diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh64 | |
| download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/sh64')
75 files changed, 17847 insertions, 0 deletions
diff --git a/arch/sh64/Kconfig b/arch/sh64/Kconfig new file mode 100644 index 0000000..76eb81f --- /dev/null +++ b/arch/sh64/Kconfig @@ -0,0 +1,293 @@ +# +# For a description of the syntax of this configuration file, +# see Documentation/kbuild/config-language.txt. +# + +mainmenu "Linux/SH64 Kernel Configuration" + +config SUPERH + bool + default y + +config SUPERH64 + bool + default y + +config MMU + bool + default y + +config UID16 + bool + default y + +config RWSEM_GENERIC_SPINLOCK + bool + default y + +config GENERIC_CALIBRATE_DELAY + bool + default y + +config LOG_BUF_SHIFT + int + default 14 + +config RWSEM_XCHGADD_ALGORITHM + bool + +config GENERIC_ISA_DMA + bool + +source init/Kconfig + +menu "System type" + +choice + prompt "SuperH system type" + default SH_SIMULATOR + +config SH_GENERIC + bool "Generic" + +config SH_SIMULATOR + bool "Simulator" + +config SH_CAYMAN + bool "Cayman" + +config SH_ROMRAM + bool "ROM/RAM" + +config SH_HARP + bool "ST50-Harp" + +endchoice + +choice + prompt "Processor family" + default CPU_SH5 + +config CPU_SH5 + bool "SH-5" + +endchoice + +choice + prompt "Processor type" + +config CPU_SUBTYPE_SH5_101 + bool "SH5-101" + depends on CPU_SH5 + +config CPU_SUBTYPE_SH5_103 + bool "SH5-103" + depends on CPU_SH5 + +endchoice + +choice + prompt "Endianness" + default LITTLE_ENDIAN + +config LITTLE_ENDIAN + bool "Little-Endian" + +config BIG_ENDIAN + bool "Big-Endian" + +endchoice + +config SH_FPU + bool "FPU support" + default y + +config SH64_FPU_DENORM_FLUSH + depends on SH_FPU + bool "Flush floating point denorms to zero" + +choice + prompt "Page table levels" + default SH64_PGTABLE_2_LEVEL + +config SH64_PGTABLE_2_LEVEL + bool "2" + +config SH64_PGTABLE_3_LEVEL + bool "3" + +endchoice + +choice + prompt "HugeTLB page size" + depends on HUGETLB_PAGE && MMU + default HUGETLB_PAGE_SIZE_64K + +config HUGETLB_PAGE_SIZE_64K + bool "64K" + +config HUGETLB_PAGE_SIZE_1MB + bool "1MB" + +config HUGETLB_PAGE_SIZE_512MB + bool "512MB" + +endchoice + +config SH64_USER_MISALIGNED_FIXUP + bool "Fixup misaligned loads/stores occurring in user mode" + +comment "Memory options" + +config CACHED_MEMORY_OFFSET + hex "Cached Area Offset" + depends on SH_HARP || SH_CAYMAN || SH_SIMULATOR + default "20000000" + +config MEMORY_START + hex "Physical memory start address" + depends on SH_HARP || SH_CAYMAN || SH_SIMULATOR + default "80000000" + +config MEMORY_SIZE_IN_MB + int "Memory size (in MB)" if SH_HARP || SH_CAYMAN || SH_SIMULATOR + default "64" if SH_HARP || SH_CAYMAN + default "8" if SH_SIMULATOR + +comment "Cache options" + +config DCACHE_DISABLED + bool "DCache Disabling" + depends on SH_HARP || SH_CAYMAN || SH_SIMULATOR + +choice + prompt "DCache mode" + depends on !DCACHE_DISABLED && !SH_SIMULATOR + default DCACHE_WRITE_BACK + +config DCACHE_WRITE_BACK + bool "Write-back" + +config DCACHE_WRITE_THROUGH + bool "Write-through" + +endchoice + +config ICACHE_DISABLED + bool "ICache Disabling" + depends on SH_HARP || SH_CAYMAN || SH_SIMULATOR + +config PCIDEVICE_MEMORY_START + hex + depends on SH_HARP || SH_CAYMAN || SH_SIMULATOR + default "C0000000" + +config DEVICE_MEMORY_START + hex + depends on SH_HARP || SH_CAYMAN || SH_SIMULATOR + default "E0000000" + +config FLASH_MEMORY_START + hex "Flash memory/on-chip devices start address" + depends on SH_HARP || SH_CAYMAN || SH_SIMULATOR + default "00000000" + +config PCI_BLOCK_START + hex "PCI block start address" + depends on SH_HARP || SH_CAYMAN || SH_SIMULATOR + default "40000000" + +comment "CPU Subtype specific options" + +config SH64_ID2815_WORKAROUND + bool "Include workaround for SH5-101 cut2 silicon defect ID2815" + +comment "Misc options" +config HEARTBEAT + bool "Heartbeat LED" + +config HDSP253_LED + bool "Support for HDSP-253 LED" + depends on SH_CAYMAN + +config SH_DMA + tristate "DMA controller (DMAC) support" + +config PREEMPT + bool "Preemptible Kernel (EXPERIMENTAL)" + depends on EXPERIMENTAL + +endmenu + +menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)" + +config ISA + bool + +config SBUS + bool + +config PCI + bool "PCI support" + help + Find out whether you have a PCI motherboard. PCI is the name of a + bus system, i.e. the way the CPU talks to the other stuff inside + your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or + VESA. If you have PCI, say Y, otherwise N. + + The PCI-HOWTO, available from + <http://www.tldp.org/docs.html#howto>, contains valuable + information about which PCI hardware does work under Linux and which + doesn't. + +config SH_PCIDMA_NONCOHERENT + bool "Cache and PCI noncoherent" + depends on PCI + default y + help + Enable this option if your platform does not have a CPU cache which + remains coherent with PCI DMA. It is safest to say 'Y', although you + will see better performance if you can say 'N', because the PCI DMA + code will not have to flush the CPU's caches. If you have a PCI host + bridge integrated with your SH CPU, refer carefully to the chip specs + to see if you can say 'N' here. Otherwise, leave it as 'Y'. + +source "drivers/pci/Kconfig" + +source "drivers/pcmcia/Kconfig" + +source "drivers/pci/hotplug/Kconfig" + +endmenu + +menu "Executable file formats" + +source "fs/Kconfig.binfmt" + +endmenu + +source "drivers/Kconfig" + +source "fs/Kconfig" + +source "arch/sh64/oprofile/Kconfig" + +source "arch/sh64/Kconfig.debug" + +source "security/Kconfig" + +source "crypto/Kconfig" + +source "lib/Kconfig" + +# +# Use the generic interrupt handling code in kernel/irq/: +# +config GENERIC_HARDIRQS + bool + default y + +config GENERIC_IRQ_PROBE + bool + default y + diff --git a/arch/sh64/Kconfig.debug b/arch/sh64/Kconfig.debug new file mode 100644 index 0000000..26d842c --- /dev/null +++ b/arch/sh64/Kconfig.debug @@ -0,0 +1,44 @@ +menu "Kernel hacking" + +source "lib/Kconfig.debug" + +config EARLY_PRINTK + bool "Early SCIF console support" + +config DEBUG_KERNEL_WITH_GDB_STUB + bool "GDB Stub kernel debug" + +config SH64_PROC_TLB + bool "Debug: report TLB fill/purge activity through /proc/tlb" + depends on PROC_FS + +config SH64_PROC_ASIDS + bool "Debug: report ASIDs through /proc/asids" + depends on PROC_FS + +config SH64_SR_WATCH + bool "Debug: set SR.WATCH to enable hardware watchpoints and trace" + +config POOR_MANS_STRACE + bool "Debug: enable rudimentary strace facility" + help + This option allows system calls to be traced to the console. It also + aids in detecting kernel stack underflow. It is useful for debugging + early-userland problems (e.g. init incurring fatal exceptions.) + +config SH_ALPHANUMERIC + bool "Enable debug outputs to on-board alphanumeric display" + +config SH_NO_BSS_INIT + bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)" + +config FRAME_POINTER + bool "Compile the kernel with frame pointers" + default y if KGDB + help + If you say Y here the resulting kernel image will be slightly larger + and slower, but it will give very useful debugging information. + If you don't debug the kernel, you can say N, but we may not be able + to solve problems without frame pointers. + +endmenu diff --git a/arch/sh64/Makefile b/arch/sh64/Makefile new file mode 100644 index 0000000..b4fd8e1 --- /dev/null +++ b/arch/sh64/Makefile @@ -0,0 +1,116 @@ +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2000, 2001 Paolo Alberelli +# Copyright (C) 2003, 2004 Paul Mundt +# +# This file is included by the global makefile so that you can add your own +# architecture-specific flags and dependencies. Remember to do have actions +# for "archclean" and "archdep" for cleaning up and making dependencies for +# this architecture +# + +cpu-y := -mb +cpu-$(CONFIG_LITTLE_ENDIAN) := -ml + +cpu-$(CONFIG_CPU_SH5) += -m5-32media-nofpu + +ifdef CONFIG_LITTLE_ENDIAN +LDFLAGS_vmlinux += --defsym 'jiffies=jiffies_64' +LDFLAGS += -EL -mshlelf32_linux +else +LDFLAGS_vmlinux += --defsym 'jiffies=jiffies_64+4' +LDFLAGS += -EB -mshelf32_linux +endif + +# No requirements for endianess support from AFLAGS, 'as' always run through gcc +AFLAGS += -m5 -isa=sh64 -traditional +CFLAGS += $(cpu-y) + +LDFLAGS_vmlinux += --defsym phys_stext=_stext-$(CONFIG_CACHED_MEMORY_OFFSET) \ + --defsym phys_stext_shmedia=phys_stext+1 \ + -e phys_stext_shmedia + +OBJCOPYFLAGS := -O binary -R .note -R .comment -R .stab -R .stabstr -S + +# +# arch/sh64/defconfig never had any hope of being +# frequently updated, so use one that does +# +KBUILD_DEFCONFIG := cayman_defconfig + +ifdef LOADADDR +LINKFLAGS += -Ttext $(word 1,$(LOADADDR)) +endif + +machine-$(CONFIG_SH_CAYMAN) := cayman +machine-$(CONFIG_SH_SIMULATOR) := sim +machine-$(CONFIG_SH_HARP) := harp +machine-$(CONFIG_SH_ROMRAM) := romram + +head-y := arch/$(ARCH)/kernel/head.o arch/$(ARCH)/kernel/init_task.o + +core-y += arch/sh64/kernel/ arch/sh64/mm/ + +ifneq ($(machine-y),) +core-y += arch/sh64/mach-$(machine-y)/ +endif + +LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name) +libs-y += arch/$(ARCH)/lib/ $(LIBGCC) + +drivers-$(CONFIG_OPROFILE) += arch/sh64/oprofile/ + +boot := arch/$(ARCH)/boot + +zImage: vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + +compressed: zImage + +archclean: + $(Q)$(MAKE) $(clean)=$(boot) + +prepare: include/asm-$(ARCH)/asm-offsets.h arch/$(ARCH)/lib/syscalltab.h + +include/asm-$(ARCH)/asm-offsets.h: arch/$(ARCH)/kernel/asm-offsets.s \ + include/asm include/linux/version.h + $(call filechk,gen-asm-offsets) + +define filechk_gen-syscalltab + (set -e; \ + echo "/*"; \ + echo " * DO NOT MODIFY."; \ + echo " *"; \ + echo " * This file was generated by arch/$(ARCH)/Makefile"; \ + echo " * Any changes will be reverted at build time."; \ + echo " */"; \ + echo ""; \ + echo "#ifndef __SYSCALLTAB_H"; \ + echo "#define __SYSCALLTAB_H"; \ + echo ""; \ + echo "#include <linux/kernel.h>"; \ + echo ""; \ + echo "struct syscall_info {"; \ + echo " const char *name;"; \ + echo "} syscall_info_table[] = {"; \ + sed -e '/^.*\.long /!d;s// { "/;s/\(\([^/]*\)\/\)\{1\}.*/\2/; \ + s/[ \t]*$$//g;s/$$/" },/;s/\("\)sys_/\1/g'; \ + echo "};"; \ + echo ""; \ + echo "#define NUM_SYSCALL_INFO_ENTRIES ARRAY_SIZE(syscall_info_table)"; \ + echo ""; \ + echo "#endif /* __SYSCALLTAB_H */" ) +endef + +arch/$(ARCH)/lib/syscalltab.h: arch/sh64/kernel/syscalls.S + $(call filechk,gen-syscalltab) + +CLEAN_FILES += include/asm-$(ARCH)/asm-offsets.h arch/$(ARCH)/lib/syscalltab.h + +define archhelp + @echo ' zImage - Compressed kernel image (arch/sh64/boot/zImage)' +endef + diff --git a/arch/sh64/boot/Makefile b/arch/sh64/boot/Makefile new file mode 100644 index 0000000..fb71087 --- /dev/null +++ b/arch/sh64/boot/Makefile @@ -0,0 +1,20 @@ +# +# arch/sh64/boot/Makefile +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2002 Stuart Menefy +# + +targets := zImage +subdir- := compressed + +$(obj)/zImage: $(obj)/compressed/vmlinux FORCE + $(call if_changed,objcopy) + @echo 'Kernel: $@ is ready' + +$(obj)/compressed/vmlinux: FORCE + $(Q)$(MAKE) $(build)=$(obj)/compressed $@ + diff --git a/arch/sh64/boot/compressed/Makefile b/arch/sh64/boot/compressed/Makefile new file mode 100644 index 0000000..9cd2167 --- /dev/null +++ b/arch/sh64/boot/compressed/Makefile @@ -0,0 +1,46 @@ +# +# linux/arch/sh64/boot/compressed/Makefile +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2002 Stuart Menefy +# Copyright (C) 2004 Paul Mundt +# +# create a compressed vmlinux image from the original vmlinux +# + +targets := vmlinux vmlinux.bin vmlinux.bin.gz \ + head.o misc.o cache.o piggy.o vmlinux.lds + +EXTRA_AFLAGS := -traditional + +OBJECTS := $(obj)/head.o $(obj)/misc.o $(obj)/cache.o + +# +# ZIMAGE_OFFSET is the load offset of the compression loader +# (4M for the kernel plus 64K for this loader) +# +ZIMAGE_OFFSET = $(shell printf "0x%8x" $$[$(CONFIG_MEMORY_START)+0x400000+0x10000]) + +LDFLAGS_vmlinux := -Ttext $(ZIMAGE_OFFSET) -e startup \ + -T $(obj)/../../kernel/vmlinux.lds \ + --no-warn-mismatch + +$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o FORCE + $(call if_changed,ld) + @: + +$(obj)/vmlinux.bin: vmlinux FORCE + $(call if_changed,objcopy) + +$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE + $(call if_changed,gzip) + +LDFLAGS_piggy.o := -r --format binary --oformat elf32-sh64-linux -T +OBJCOPYFLAGS += -R .empty_zero_page + +$(obj)/piggy.o: $(obj)/vmlinux.lds $(obj)/vmlinux.bin.gz FORCE + $(call if_changed,ld) + diff --git a/arch/sh64/boot/compressed/cache.c b/arch/sh64/boot/compressed/cache.c new file mode 100644 index 0000000..7087073 --- /dev/null +++ b/arch/sh64/boot/compressed/cache.c @@ -0,0 +1,39 @@ +/* + * arch/shmedia/boot/compressed/cache.c -- simple cache management functions + * + * Code extracted from sh-ipl+g, sh-stub.c, which has the copyright: + * + * This is originally based on an m68k software stub written by Glenn + * Engel at HP, but has changed quite a bit. + * + * Modifications for the SH by Ben Lee and Steve Chamberlain + * +**************************************************************************** + + THIS SOFTWARE IS NOT COPYRIGHTED + + HP offers the following for use in the public domain. HP makes no + warranty with regard to the software or it's performance and the + user accepts the software "AS IS" with all faults. + + HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD + TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES + OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + +****************************************************************************/ + +#define CACHE_ENABLE 0 +#define CACHE_DISABLE 1 + +int cache_control(unsigned int command) +{ + volatile unsigned int *p = (volatile unsigned int *) 0x80000000; + int i; + + for (i = 0; i < (32 * 1024); i += 32) { + (void *) *p; + p += (32 / sizeof (int)); + } + + return 0; +} diff --git a/arch/sh64/boot/compressed/head.S b/arch/sh64/boot/compressed/head.S new file mode 100644 index 0000000..82040b1 --- /dev/null +++ b/arch/sh64/boot/compressed/head.S @@ -0,0 +1,164 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/shmedia/boot/compressed/head.S + * + * Copied from + * arch/shmedia/kernel/head.S + * which carried the copyright: + * Copyright (C) 2000, 2001 Paolo Alberelli + * + * Modification for compressed loader: + * Copyright (C) 2002 Stuart Menefy (stuart.menefy@st.com) + */ + +#include <linux/linkage.h> +#include <asm/registers.h> +#include <asm/cache.h> +#include <asm/mmu_context.h> + +/* + * Fixed TLB entries to identity map the beginning of RAM + */ +#define MMUIR_TEXT_H 0x0000000000000003 | CONFIG_MEMORY_START + /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */ +#define MMUIR_TEXT_L 0x000000000000009a | CONFIG_MEMORY_START + /* 512 Mb, Cacheable (Write-back), execute, Not User, Ph. Add. */ + +#define MMUDR_CACHED_H 0x0000000000000003 | CONFIG_MEMORY_START + /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */ +#define MMUDR_CACHED_L 0x000000000000015a | CONFIG_MEMORY_START + /* 512 Mb, Cacheable (Write-back), read/write, Not User, Ph. Add. */ + +#define ICCR0_INIT_VAL ICCR0_ON | ICCR0_ICI /* ICE + ICI */ +#define ICCR1_INIT_VAL ICCR1_NOLOCK /* No locking */ + +#if 1 +#define OCCR0_INIT_VAL OCCR0_ON | OCCR0_OCI | OCCR0_WB /* OCE + OCI + WB */ +#else +#define OCCR0_INIT_VAL OCCR0_OFF +#endif +#define OCCR1_INIT_VAL OCCR1_NOLOCK /* No locking */ + + .text + + .global startup +startup: + /* + * Prevent speculative fetch on device memory due to + * uninitialized target registers. + * This must be executed before the first branch. + */ + ptabs/u ZERO, tr0 + ptabs/u ZERO, tr1 + ptabs/u ZERO, tr2 + ptabs/u ZERO, tr3 + ptabs/u ZERO, tr4 + ptabs/u ZERO, tr5 + ptabs/u ZERO, tr6 + ptabs/u ZERO, tr7 + synci + + /* + * Set initial TLB entries for cached and uncached regions. + * Note: PTA/BLINK is PIC code, PTABS/BLINK isn't ! + */ + /* Clear ITLBs */ + pta 1f, tr1 + movi ITLB_FIXED, r21 + movi ITLB_LAST_VAR_UNRESTRICTED+TLB_STEP, r22 +1: putcfg r21, 0, ZERO /* Clear MMUIR[n].PTEH.V */ + addi r21, TLB_STEP, r21 + bne r21, r22, tr1 + + /* Clear DTLBs */ + pta 1f, tr1 + movi DTLB_FIXED, r21 + movi DTLB_LAST_VAR_UNRESTRICTED+TLB_STEP, r22 +1: putcfg r21, 0, ZERO /* Clear MMUDR[n].PTEH.V */ + addi r21, TLB_STEP, r21 + bne r21, r22, tr1 + + /* Map one big (512Mb) page for ITLB */ + movi ITLB_FIXED, r21 + movi MMUIR_TEXT_L, r22 /* PTEL first */ + putcfg r21, 1, r22 /* Set MMUIR[0].PTEL */ + movi MMUIR_TEXT_H, r22 /* PTEH last */ + putcfg r21, 0, r22 /* Set MMUIR[0].PTEH */ + + /* Map one big CACHED (512Mb) page for DTLB */ + movi DTLB_FIXED, r21 + movi MMUDR_CACHED_L, r22 /* PTEL first */ + putcfg r21, 1, r22 /* Set MMUDR[0].PTEL */ + movi MMUDR_CACHED_H, r22 /* PTEH last */ + putcfg r21, 0, r22 /* Set MMUDR[0].PTEH */ + + /* ICache */ + movi ICCR_BASE, r21 + movi ICCR0_INIT_VAL, r22 + movi ICCR1_INIT_VAL, r23 + putcfg r21, ICCR_REG0, r22 + putcfg r21, ICCR_REG1, r23 + synci + + /* OCache */ + movi OCCR_BASE, r21 + movi OCCR0_INIT_VAL, r22 + movi OCCR1_INIT_VAL, r23 + putcfg r21, OCCR_REG0, r22 + putcfg r21, OCCR_REG1, r23 + synco + + /* + * Enable the MMU. + * From here-on code can be non-PIC. + */ + movi SR_HARMLESS | SR_ENABLE_MMU, r22 + putcon r22, SSR + movi 1f, r22 + putcon r22, SPC + synco + rte /* And now go into the hyperspace ... */ +1: /* ... that's the next instruction ! */ + + /* Set initial stack pointer */ + movi datalabel stack_start, r0 + ld.l r0, 0, r15 + + /* + * Clear bss + */ + pt 1f, tr1 + movi datalabel __bss_start, r22 + movi datalabel _end, r23 +1: st.l r22, 0, ZERO + addi r22, 4, r22 + bne r22, r23, tr1 + + /* + * Decompress the kernel. + */ + pt decompress_kernel, tr0 + blink tr0, r18 + + /* + * Disable the MMU. + */ + movi SR_HARMLESS, r22 + putcon r22, SSR + movi 1f, r22 + putcon r22, SPC + synco + rte /* And now go into the hyperspace ... */ +1: /* ... that's the next instruction ! */ + + /* Jump into the decompressed kernel */ + movi datalabel (CONFIG_MEMORY_START + 0x2000)+1, r19 + ptabs r19, tr0 + blink tr0, r18 + + /* Shouldn't return here, but just in case, loop forever */ + pt 1f, tr0 +1: blink tr0, ZERO diff --git a/arch/sh64/boot/compressed/install.sh b/arch/sh64/boot/compressed/install.sh new file mode 100644 index 0000000..90589f0 --- /dev/null +++ b/arch/sh64/boot/compressed/install.sh @@ -0,0 +1,56 @@ +#!/bin/sh +# +# arch/sh/boot/install.sh +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 1995 by Linus Torvalds +# +# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin +# Adapted from code in arch/i386/boot/install.sh by Russell King +# Adapted from code in arch/arm/boot/install.sh by Stuart Menefy +# +# "make install" script for sh architecture +# +# Arguments: +# $1 - kernel version +# $2 - kernel image file +# $3 - kernel map file +# $4 - default install path (blank if root directory) +# + +# User may have a custom install script + +if [ -x /sbin/installkernel ]; then + exec /sbin/installkernel "$@" +fi + +if [ "$2" = "zImage" ]; then +# Compressed install + echo "Installing compressed kernel" + if [ -f $4/vmlinuz-$1 ]; then + mv $4/vmlinuz-$1 $4/vmlinuz.old + fi + + if [ -f $4/System.map-$1 ]; then + mv $4/System.map-$1 $4/System.old + fi + + cat $2 > $4/vmlinuz-$1 + cp $3 $4/System.map-$1 +else +# Normal install + echo "Installing normal kernel" + if [ -f $4/vmlinux-$1 ]; then + mv $4/vmlinux-$1 $4/vmlinux.old + fi + + if [ -f $4/System.map ]; then + mv $4/System.map $4/System.old + fi + + cat $2 > $4/vmlinux-$1 + cp $3 $4/System.map +fi diff --git a/arch/sh64/boot/compressed/misc.c b/arch/sh64/boot/compressed/misc.c new file mode 100644 index 0000000..89dbf45 --- /dev/null +++ b/arch/sh64/boot/compressed/misc.c @@ -0,0 +1,251 @@ +/* + * arch/shmedia/boot/compressed/misc.c + * + * This is a collection of several routines from gzip-1.0.3 + * adapted for Linux. + * + * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994 + * + * Adapted for SHmedia from sh by Stuart Menefy, May 2002 + */ + +#include <linux/config.h> +#include <asm/uaccess.h> + +/* cache.c */ +#define CACHE_ENABLE 0 +#define CACHE_DISABLE 1 +int cache_control(unsigned int command); + +/* + * gzip declarations + */ + +#define OF(args) args +#define STATIC static + +#undef memset +#undef memcpy +#define memzero(s, n) memset ((s), 0, (n)) + +typedef unsigned char uch; +typedef unsigned short ush; +typedef unsigned long ulg; + +#define WSIZE 0x8000 /* Window size must be at least 32k, */ + /* and a power of two */ + +static uch *inbuf; /* input buffer */ +static uch window[WSIZE]; /* Sliding window buffer */ + +static unsigned insize = 0; /* valid bytes in inbuf */ +static unsigned inptr = 0; /* index of next byte to be processed in inbuf */ +static unsigned outcnt = 0; /* bytes in output buffer */ + +/* gzip flag byte */ +#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */ +#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */ +#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */ +#define ORIG_NAME 0x08 /* bit 3 set: original file name present */ +#define COMMENT 0x10 /* bit 4 set: file comment present */ +#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */ +#define RESERVED 0xC0 /* bit 6,7: reserved */ + +#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf()) + +/* Diagnostic functions */ +#ifdef DEBUG +# define Assert(cond,msg) {if(!(cond)) error(msg);} +# define Trace(x) fprintf x +# define Tracev(x) {if (verbose) fprintf x ;} +# define Tracevv(x) {if (verbose>1) fprintf x ;} +# define Tracec(c,x) {if (verbose && (c)) fprintf x ;} +# define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;} +#else +# define Assert(cond,msg) +# define Trace(x) +# define Tracev(x) +# define Tracevv(x) +# define Tracec(c,x) +# define Tracecv(c,x) +#endif + +static int fill_inbuf(void); +static void flush_window(void); +static void error(char *m); +static void gzip_mark(void **); +static void gzip_release(void **); + +extern char input_data[]; +extern int input_len; + +static long bytes_out = 0; +static uch *output_data; +static unsigned long output_ptr = 0; + +static void *malloc(int size); +static void free(void *where); +static void error(char *m); +static void gzip_mark(void **); +static void gzip_release(void **); + +static void puts(const char *); + +extern int _text; /* Defined in vmlinux.lds.S */ +extern int _end; +static unsigned long free_mem_ptr; +static unsigned long free_mem_end_ptr; + +#define HEAP_SIZE 0x10000 + +#include "../../../../lib/inflate.c" + +static void *malloc(int size) +{ + void *p; + + if (size < 0) + error("Malloc error\n"); + if (free_mem_ptr == 0) + error("Memory error\n"); + + free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */ + + p = (void *) free_mem_ptr; + free_mem_ptr += size; + + if (free_mem_ptr >= free_mem_end_ptr) + error("\nOut of memory\n"); + + return p; +} + +static void free(void *where) +{ /* Don't care */ +} + +static void gzip_mark(void **ptr) +{ + *ptr = (void *) free_mem_ptr; +} + +static void gzip_release(void **ptr) +{ + free_mem_ptr = (long) *ptr; +} + +void puts(const char *s) +{ +} + +void *memset(void *s, int c, size_t n) +{ + int i; + char *ss = (char *) s; + + for (i = 0; i < n; i++) + ss[i] = c; + return s; +} + +void *memcpy(void *__dest, __const void *__src, size_t __n) +{ + int i; + char *d = (char *) __dest, *s = (char *) __src; + + for (i = 0; i < __n; i++) + d[i] = s[i]; + return __dest; +} + +/* =========================================================================== + * Fill the input buffer. This is called only when the buffer is empty + * and at least one byte is really needed. + */ +static int fill_inbuf(void) +{ + if (insize != 0) { + error("ran out of input data\n"); + } + + inbuf = input_data; + insize = input_len; + inptr = 1; + return inbuf[0]; +} + +/* =========================================================================== + * Write the output window window[0..outcnt-1] and update crc and bytes_out. + * (Used for the decompressed data only.) + */ +static void flush_window(void) +{ + ulg c = crc; /* temporary variable */ + unsigned n; + uch *in, *out, ch; + + in = window; + out = &output_data[output_ptr]; + for (n = 0; n < outcnt; n++) { + ch = *out++ = *in++; + c = crc_32_tab[((int) c ^ ch) & 0xff] ^ (c >> 8); + } + crc = c; + bytes_out += (ulg) outcnt; + output_ptr += (ulg) outcnt; + outcnt = 0; + puts("."); +} + +static void error(char *x) +{ + puts("\n\n"); + puts(x); + puts("\n\n -- System halted"); + + while (1) ; /* Halt */ +} + +#define STACK_SIZE (4096) +long __attribute__ ((aligned(8))) user_stack[STACK_SIZE]; +long *stack_start = &user_stack[STACK_SIZE]; + +void decompress_kernel(void) +{ + output_data = (uch *) (CONFIG_MEMORY_START + 0x2000); + free_mem_ptr = (unsigned long) &_end; + free_mem_end_ptr = free_mem_ptr + HEAP_SIZE; + + makecrc(); + puts("Uncompressing Linux... "); + cache_control(CACHE_ENABLE); + gunzip(); + puts("\n"); + +#if 0 + /* When booting from ROM may want to do something like this if the + * boot loader doesn't. + */ + + /* Set up the parameters and command line */ + { + volatile unsigned int *parambase = + (int *) (CONFIG_MEMORY_START + 0x1000); + + parambase[0] = 0x1; /* MOUNT_ROOT_RDONLY */ + parambase[1] = 0x0; /* RAMDISK_FLAGS */ + parambase[2] = 0x0200; /* ORIG_ROOT_DEV */ + parambase[3] = 0x0; /* LOADER_TYPE */ + parambase[4] = 0x0; /* INITRD_START */ + parambase[5] = 0x0; /* INITRD_SIZE */ + parambase[6] = 0; + + strcpy((char *) ((int) parambase + 0x100), + "console=ttySC0,38400"); + } +#endif + + puts("Ok, booting the kernel.\n"); + + cache_control(CACHE_DISABLE); +} diff --git a/arch/sh64/boot/compressed/vmlinux.lds.S b/arch/sh64/boot/compressed/vmlinux.lds.S new file mode 100644 index 0000000..15a737d --- /dev/null +++ b/arch/sh64/boot/compressed/vmlinux.lds.S @@ -0,0 +1,65 @@ +/* + * ld script to make compressed SuperH/shmedia Linux kernel+decompression + * bootstrap + * Modified by Stuart Menefy from arch/sh/vmlinux.lds.S written by Niibe Yutaka + */ + +#include <linux/config.h> + +#ifdef CONFIG_LITTLE_ENDIAN +/* OUTPUT_FORMAT("elf32-sh64l-linux", "elf32-sh64l-linux", "elf32-sh64l-linux") */ +#define NOP 0x6ff0fff0 +#else +/* OUTPUT_FORMAT("elf32-sh64", "elf32-sh64", "elf32-sh64") */ +#define NOP 0xf0fff06f +#endif + +OUTPUT_FORMAT("elf32-sh64-linux") +OUTPUT_ARCH(sh) +ENTRY(_start) + +#define ALIGNED_GAP(section, align) (((ADDR(section)+SIZEOF(section)+(align)-1) & ~((align)-1))-ADDR(section)) +#define FOLLOWING(section, align) AT (LOADADDR(section) + ALIGNED_GAP(section,align)) + +SECTIONS +{ + _text = .; /* Text and read-only data */ + + .text : { + *(.text) + *(.text64) + *(.text..SHmedia32) + *(.fixup) + *(.gnu.warning) + } = NOP + . = ALIGN(4); + .rodata : { *(.rodata) } + + /* There is no 'real' reason for eight byte alignment, four would work + * as well, but gdb downloads much (*4) faster with this. + */ + . = ALIGN(8); + .image : { *(.image) } + . = ALIGN(4); + _etext = .; /* End of text section */ + + .data : /* Data */ + FOLLOWING(.image, 4) + { + _data = .; + *(.data) + } + _data_image = LOADADDR(.data);/* Address of data section in ROM */ + + _edata = .; /* End of data section */ + + .stack : { stack = .; _stack = .; } + + . = ALIGN(4); + __bss_start = .; /* BSS */ + .bss : { + *(.bss) + } + . = ALIGN(4); + _end = . ; +} diff --git a/arch/sh64/configs/cayman_defconfig b/arch/sh64/configs/cayman_defconfig new file mode 100644 index 0000000..48f2740 --- /dev/null +++ b/arch/sh64/configs/cayman_defconfig @@ -0,0 +1,837 @@ +# +# Automatically generated make config: don't edit +# Linux kernel version: 2.6.11 +# Fri Feb 25 18:14:31 2005 +# +CONFIG_SUPERH=y +CONFIG_SUPERH64=y +CONFIG_MMU=y +CONFIG_UID16=y +CONFIG_RWSEM_GENERIC_SPINLOCK=y +CONFIG_GENERIC_CALIBRATE_DELAY=y +CONFIG_LOG_BUF_SHIFT=14 + +# +# Code maturity level options +# +CONFIG_EXPERIMENTAL=y +CONFIG_CLEAN_COMPILE=y +CONFIG_BROKEN_ON_SMP=y + +# +# General setup +# +CONFIG_LOCALVERSION="" +CONFIG_SWAP=y +# CONFIG_SYSVIPC is not set +CONFIG_POSIX_MQUEUE=y +# CONFIG_BSD_PROCESS_ACCT is not set +CONFIG_SYSCTL=y +# CONFIG_AUDIT is not set +# CONFIG_HOTPLUG is not set +CONFIG_KOBJECT_UEVENT=y +# CONFIG_IKCONFIG is not set +# CONFIG_EMBEDDED is not set +CONFIG_KALLSYMS=y +# CONFIG_KALLSYMS_ALL is not set +# CONFIG_KALLSYMS_EXTRA_PASS is not set +CONFIG_FUTEX=y +CONFIG_EPOLL=y +# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set +CONFIG_SHMEM=y +CONFIG_CC_ALIGN_FUNCTIONS=0 +CONFIG_CC_ALIGN_LABELS=0 +CONFIG_CC_ALIGN_LOOPS=0 +CONFIG_CC_ALIGN_JUMPS=0 +# CONFIG_TINY_SHMEM is not set + +# +# Loadable module support +# +# CONFIG_MODULES is not set + +# +# System type +# +# CONFIG_SH_GENERIC is not set +# CONFIG_SH_SIMULATOR is not set +CONFIG_SH_CAYMAN=y +# CONFIG_SH_ROMRAM is not set +# CONFIG_SH_HARP is not set +CONFIG_CPU_SH5=y +CONFIG_CPU_SUBTYPE_SH5_101=y +# CONFIG_CPU_SUBTYPE_SH5_103 is not set +CONFIG_LITTLE_ENDIAN=y +# CONFIG_BIG_ENDIAN is not set +CONFIG_SH_FPU=y +# CONFIG_SH64_FPU_DENORM_FLUSH is not set +CONFIG_SH64_PGTABLE_2_LEVEL=y +# CONFIG_SH64_PGTABLE_3_LEVEL is not set +CONFIG_HUGETLB_PAGE_SIZE_64K=y +# CONFIG_HUGETLB_PAGE_SIZE_1MB is not set +# CONFIG_HUGETLB_PAGE_SIZE_512MB is not set +CONFIG_SH64_USER_MISALIGNED_FIXUP=y + +# +# Memory options +# +CONFIG_CACHED_MEMORY_OFFSET=0x20000000 +CONFIG_MEMORY_START=0x80000000 +CONFIG_MEMORY_SIZE_IN_MB=128 + +# +# Cache options +# +# CONFIG_DCACHE_DISABLED is not set +CONFIG_DCACHE_WRITE_BACK=y +# CONFIG_DCACHE_WRITE_THROUGH is not set +# CONFIG_ICACHE_DISABLED is not set +CONFIG_PCIDEVICE_MEMORY_START=C0000000 +CONFIG_DEVICE_MEMORY_START=E0000000 +CONFIG_FLASH_MEMORY_START=0x00000000 +CONFIG_PCI_BLOCK_START=0x40000000 + +# +# CPU Subtype specific options +# +CONFIG_SH64_ID2815_WORKAROUND=y + +# +# Misc options +# +CONFIG_HEARTBEAT=y +CONFIG_HDSP253_LED=y +CONFIG_SH_DMA=y +CONFIG_PREEMPT=y + +# +# Bus options (PCI, PCMCIA, EISA, MCA, ISA) +# +CONFIG_SUPERHYWAY=y +CONFIG_PCI=y +CONFIG_SH_PCIDMA_NONCOHERENT=y +CONFIG_PCI_LEGACY_PROC=y +CONFIG_PCI_NAMES=y + +# +# PCCARD (PCMCIA/CardBus) support +# +# CONFIG_PCCARD is not set + +# +# PC-card bridges +# + +# +# PCI Hotplug Support +# +# CONFIG_HOTPLUG_PCI is not set + +# +# Executable file formats +# +CONFIG_BINFMT_ELF=y +# CONFIG_BINFMT_FLAT is not set +# CONFIG_BINFMT_MISC is not set + +# +# Device Drivers +# + +# +# Generic Driver Options +# +CONFIG_STANDALONE=y +CONFIG_PREVENT_FIRMWARE_BUILD=y +# CONFIG_FW_LOADER is not set +# CONFIG_DEBUG_DRIVER is not set + +# +# Memory Technology Devices (MTD) +# +# CONFIG_MTD is not set + +# +# Parallel port support +# +# CONFIG_PARPORT is not set + +# +# Plug and Play support +# + +# +# Block devices +# +# CONFIG_BLK_DEV_FD is not set +# CONFIG_BLK_CPQ_DA is not set +# CONFIG_BLK_CPQ_CISS_DA is not set +# CONFIG_BLK_DEV_DAC960 is not set +# CONFIG_BLK_DEV_UMEM is not set +# CONFIG_BLK_DEV_COW_COMMON is not set +CONFIG_BLK_DEV_LOOP=y +# CONFIG_BLK_DEV_CRYPTOLOOP is not set +# CONFIG_BLK_DEV_NBD is not set +# CONFIG_BLK_DEV_SX8 is not set +CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_RAM_COUNT=16 +CONFIG_BLK_DEV_RAM_SIZE=4096 +# CONFIG_BLK_DEV_INITRD is not set +CONFIG_INITRAMFS_SOURCE="" +# CONFIG_LBD is not set +# CONFIG_CDROM_PKTCDVD is not set + +# +# IO Schedulers +# +CONFIG_IOSCHED_NOOP=y +CONFIG_IOSCHED_AS=y +CONFIG_IOSCHED_DEADLINE=y +CONFIG_IOSCHED_CFQ=y +# CONFIG_ATA_OVER_ETH is not set + +# +# ATA/ATAPI/MFM/RLL support +# +# CONFIG_IDE is not set + +# +# SCSI device support +# +CONFIG_SCSI=y +CONFIG_SCSI_PROC_FS=y + +# +# SCSI support type (disk, tape, CD-ROM) +# +CONFIG_BLK_DEV_SD=y +# CONFIG_CHR_DEV_ST is not set +# CONFIG_CHR_DEV_OSST is not set +# CONFIG_BLK_DEV_SR is not set +# CONFIG_CHR_DEV_SG is not set + +# +# Some SCSI devices (e.g. CD jukebox) support multiple LUNs +# +CONFIG_SCSI_MULTI_LUN=y +# CONFIG_SCSI_CONSTANTS is not set +# CONFIG_SCSI_LOGGING is not set + +# +# SCSI Transport Attributes +# +CONFIG_SCSI_SPI_ATTRS=y +# CONFIG_SCSI_FC_ATTRS is not set +# CONFIG_SCSI_ISCSI_ATTRS is not set + +# +# SCSI low-level drivers +# +# CONFIG_BLK_DEV_3W_XXXX_RAID is not set +# CONFIG_SCSI_3W_9XXX is not set +# CONFIG_SCSI_ACARD is not set +# CONFIG_SCSI_AACRAID is not set +# CONFIG_SCSI_AIC7XXX is not set +# CONFIG_SCSI_AIC7XXX_OLD is not set +# CONFIG_SCSI_AIC79XX is not set +# CONFIG_SCSI_DPT_I2O is not set +# CONFIG_MEGARAID_NEWGEN is not set +# CONFIG_MEGARAID_LEGACY is not set +# CONFIG_SCSI_SATA is not set +# CONFIG_SCSI_BUSLOGIC is not set +# CONFIG_SCSI_DMX3191D is not set +# CONFIG_SCSI_EATA is not set +# CONFIG_SCSI_EATA_PIO is not set +# CONFIG_SCSI_FUTURE_DOMAIN is not set +# CONFIG_SCSI_GDTH is not set +# CONFIG_SCSI_IPS is not set +# CONFIG_SCSI_INITIO is not set +# CONFIG_SCSI_INIA100 is not set +CONFIG_SCSI_SYM53C8XX_2=y +CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=0 +CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS=16 +CONFIG_SCSI_SYM53C8XX_MAX_TAGS=64 +# CONFIG_SCSI_SYM53C8XX_IOMAPPED is not set +# CONFIG_SCSI_IPR is not set +# CONFIG_SCSI_QLOGIC_ISP is not set +# CONFIG_SCSI_QLOGIC_FC is not set +# CONFIG_SCSI_QLOGIC_1280 is not set +CONFIG_SCSI_QLA2XXX=y +# CONFIG_SCSI_QLA21XX is not set +# CONFIG_SCSI_QLA22XX is not set +# CONFIG_SCSI_QLA2300 is not set +# CONFIG_SCSI_QLA2322 is not set +# CONFIG_SCSI_QLA6312 is not set +# CONFIG_SCSI_DC395x is not set +# CONFIG_SCSI_DC390T is not set +# CONFIG_SCSI_NSP32 is not set +# CONFIG_SCSI_DEBUG is not set + +# +# Multi-device support (RAID and LVM) +# +# CONFIG_MD is not set + +# +# Fusion MPT device support +# +# CONFIG_FUSION is not set + +# +# IEEE 1394 (FireWire) support +# +# CONFIG_IEEE1394 is not set + +# +# I2O device support +# +# CONFIG_I2O is not set + +# +# Networking support +# +CONFIG_NET=y + +# +# Networking options +# +CONFIG_PACKET=y +# CONFIG_PACKET_MMAP is not set +# CONFIG_NETLINK_DEV is not set +CONFIG_UNIX=y +# CONFIG_NET_KEY is not set +CONFIG_INET=y +# CONFIG_IP_MULTICAST is not set +# CONFIG_IP_ADVANCED_ROUTER is not set +CONFIG_IP_PNP=y +# CONFIG_IP_PNP_DHCP is not set +# CONFIG_IP_PNP_BOOTP is not set +# CONFIG_IP_PNP_RARP is not set +# CONFIG_NET_IPIP is not set +# CONFIG_NET_IPGRE is not set +# CONFIG_ARPD is not set +# CONFIG_SYN_COOKIES is not set +# CONFIG_INET_AH is not set +# CONFIG_INET_ESP is not set +# CONFIG_INET_IPCOMP is not set +# CONFIG_INET_TUNNEL is not set +CONFIG_IP_TCPDIAG=y +# CONFIG_IP_TCPDIAG_IPV6 is not set +# CONFIG_IPV6 is not set +# CONFIG_NETFILTER is not set + +# +# SCTP Configuration (EXPERIMENTAL) +# +# CONFIG_IP_SCTP is not set +# CONFIG_ATM is not set +# CONFIG_BRIDGE is not set +# CONFIG_VLAN_8021Q is not set +# CONFIG_DECNET is not set +# CONFIG_LLC2 is not set +# CONFIG_IPX is not set +# CONFIG_ATALK is not set +# CONFIG_X25 is not set +# CONFIG_LAPB is not set +# CONFIG_NET_DIVERT is not set +# CONFIG_ECONET is not set +# CONFIG_WAN_ROUTER is not set + +# +# QoS and/or fair queueing +# +# CONFIG_NET_SCHED is not set +# CONFIG_NET_CLS_ROUTE is not set + +# +# Network testing +# +# CONFIG_NET_PKTGEN is not set +# CONFIG_NETPOLL is not set +# CONFIG_NET_POLL_CONTROLLER is not set +# CONFIG_HAMRADIO is not set +# CONFIG_IRDA is not set +# CONFIG_BT is not set +CONFIG_NETDEVICES=y +# CONFIG_DUMMY is not set +# CONFIG_BONDING is not set +# CONFIG_EQUALIZER is not set +# CONFIG_TUN is not set + +# +# ARCnet devices +# +# CONFIG_ARCNET is not set + +# +# Ethernet (10 or 100Mbit) +# +CONFIG_NET_ETHERNET=y +# CONFIG_MII is not set +# CONFIG_STNIC is not set +# CONFIG_HAPPYMEAL is not set +# CONFIG_SUNGEM is not set +# CONFIG_NET_VENDOR_3COM is not set + +# +# Tulip family network device support +# +CONFIG_NET_TULIP=y +# CONFIG_DE2104X is not set +CONFIG_TULIP=y +# CONFIG_TULIP_MWI is not set +# CONFIG_TULIP_MMIO is not set +# CONFIG_TULIP_NAPI is not set +# CONFIG_DE4X5 is not set +# CONFIG_WINBOND_840 is not set +# CONFIG_DM9102 is not set +# CONFIG_HP100 is not set +CONFIG_NET_PCI=y +# CONFIG_PCNET32 is not set +# CONFIG_AMD8111_ETH is not set +# CONFIG_ADAPTEC_STARFIRE is not set +# CONFIG_B44 is not set +# CONFIG_FORCEDETH is not set +# CONFIG_DGRS is not set +# CONFIG_EEPRO100 is not set +# CONFIG_E100 is not set +# CONFIG_FEALNX is not set +# CONFIG_NATSEMI is not set +# CONFIG_NE2K_PCI is not set +# CONFIG_8139CP is not set +# CONFIG_8139TOO is not set +# CONFIG_SIS900 is not set +# CONFIG_EPIC100 is not set +# CONFIG_SUNDANCE is not set +# CONFIG_TLAN is not set +# CONFIG_VIA_RHINE is not set + +# +# Ethernet (1000 Mbit) +# +# CONFIG_ACENIC is not set +# CONFIG_DL2K is not set +# CONFIG_E1000 is not set +# CONFIG_NS83820 is not set +# CONFIG_HAMACHI is not set +# CONFIG_YELLOWFIN is not set +# CONFIG_R8169 is not set +# CONFIG_SK98LIN is not set +# CONFIG_VIA_VELOCITY is not set +# CONFIG_TIGON3 is not set + +# +# Ethernet (10000 Mbit) +# +# CONFIG_IXGB is not set +# CONFIG_S2IO is not set + +# +# Token Ring devices +# +# CONFIG_TR is not set + +# +# Wireless LAN (non-hamradio) +# +# CONFIG_NET_RADIO is not set + +# +# Wan interfaces +# +# CONFIG_WAN is not set +# CONFIG_FDDI is not set +# CONFIG_HIPPI is not set +# CONFIG_PPP is not set +# CONFIG_SLIP is not set +# CONFIG_NET_FC is not set +# CONFIG_SHAPER is not set +# CONFIG_NETCONSOLE is not set + +# +# ISDN subsystem +# +# CONFIG_ISDN is not set + +# +# Telephony Support +# +# CONFIG_PHONE is not set + +# +# Input device support +# +CONFIG_INPUT=y + +# +# Userland interfaces +# +CONFIG_INPUT_MOUSEDEV=y +CONFIG_INPUT_MOUSEDEV_PSAUX=y +CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024 +CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768 +# CONFIG_INPUT_JOYDEV is not set +# CONFIG_INPUT_TSDEV is not set +# CONFIG_INPUT_EVDEV is not set +# CONFIG_INPUT_EVBUG is not set + +# +# Input I/O drivers +# +# CONFIG_GAMEPORT is not set +CONFIG_SOUND_GAMEPORT=y +CONFIG_SERIO=y +CONFIG_SERIO_I8042=y +CONFIG_SERIO_SERPORT=y +# CONFIG_SERIO_CT82C710 is not set +# CONFIG_SERIO_PCIPS2 is not set +CONFIG_SERIO_LIBPS2=y +# CONFIG_SERIO_RAW is not set + +# +# Input Device Drivers +# +CONFIG_INPUT_KEYBOARD=y +CONFIG_KEYBOARD_ATKBD=y +# CONFIG_KEYBOARD_SUNKBD is not set +# CONFIG_KEYBOARD_LKKBD is not set +# CONFIG_KEYBOARD_XTKBD is not set +# CONFIG_KEYBOARD_NEWTON is not set +CONFIG_INPUT_MOUSE=y +CONFIG_MOUSE_PS2=y +# CONFIG_MOUSE_SERIAL is not set +# CONFIG_MOUSE_VSXXXAA is not set +# CONFIG_INPUT_JOYSTICK is not set +# CONFIG_INPUT_TOUCHSCREEN is not set +# CONFIG_INPUT_MISC is not set + +# +# Character devices +# +CONFIG_VT=y +CONFIG_VT_CONSOLE=y +CONFIG_HW_CONSOLE=y +# CONFIG_SERIAL_NONSTANDARD is not set + +# +# Serial drivers +# +# CONFIG_SERIAL_8250 is not set + +# +# Non-8250 serial port support +# +CONFIG_SERIAL_SH_SCI=y +CONFIG_SERIAL_SH_SCI_CONSOLE=y +CONFIG_SERIAL_CORE=y +CONFIG_SERIAL_CORE_CONSOLE=y +CONFIG_UNIX98_PTYS=y +CONFIG_LEGACY_PTYS=y +CONFIG_LEGACY_PTY_COUNT=256 + +# +# IPMI +# +# CONFIG_IPMI_HANDLER is not set + +# +# Watchdog Cards +# +CONFIG_WATCHDOG=y +# CONFIG_WATCHDOG_NOWAYOUT is not set + +# +# Watchdog Device Drivers +# +# CONFIG_SOFT_WATCHDOG is not set +# CONFIG_SH_WDT is not set + +# +# PCI-based Watchdog Cards +# +# CONFIG_PCIPCWATCHDOG is not set +# CONFIG_WDTPCI is not set +# CONFIG_RTC is not set +# CONFIG_GEN_RTC is not set +# CONFIG_DTLK is not set +# CONFIG_R3964 is not set +# CONFIG_APPLICOM is not set + +# +# Ftape, the floppy tape device driver +# +# CONFIG_DRM is not set +# CONFIG_RAW_DRIVER is not set + +# +# I2C support +# +# CONFIG_I2C is not set + +# +# Dallas's 1-wire bus +# +# CONFIG_W1 is not set + +# +# Misc devices +# + +# +# Multimedia devices +# +# CONFIG_VIDEO_DEV is not set + +# +# Digital Video Broadcasting Devices +# +# CONFIG_DVB is not set + +# +# Graphics support +# +CONFIG_FB=y +CONFIG_FB_MODE_HELPERS=y +# CONFIG_FB_TILEBLITTING is not set +# CONFIG_FB_CIRRUS is not set +# CONFIG_FB_PM2 is not set +# CONFIG_FB_CYBER2000 is not set +# CONFIG_FB_ASILIANT is not set +# CONFIG_FB_IMSTT is not set +# CONFIG_FB_EPSON1355 is not set +# CONFIG_FB_RIVA is not set +# CONFIG_FB_MATROX is not set +# CONFIG_FB_RADEON_OLD is not set +# CONFIG_FB_RADEON is not set +# CONFIG_FB_ATY128 is not set +# CONFIG_FB_ATY is not set +# CONFIG_FB_SAVAGE is not set +# CONFIG_FB_SIS is not set +# CONFIG_FB_NEOMAGIC is not set +CONFIG_FB_KYRO=y +# CONFIG_FB_3DFX is not set +# CONFIG_FB_VOODOO1 is not set +# CONFIG_FB_TRIDENT is not set +# CONFIG_FB_VIRTUAL is not set + +# +# Console display driver support +# +# CONFIG_VGA_CONSOLE is not set +CONFIG_DUMMY_CONSOLE=y +CONFIG_FRAMEBUFFER_CONSOLE=y +CONFIG_FONTS=y +# CONFIG_FONT_8x8 is not set +CONFIG_FONT_8x16=y +# CONFIG_FONT_6x11 is not set +# CONFIG_FONT_PEARL_8x8 is not set +# CONFIG_FONT_ACORN_8x8 is not set +# CONFIG_FONT_MINI_4x6 is not set +# CONFIG_FONT_SUN8x16 is not set +# CONFIG_FONT_SUN12x22 is not set + +# +# Logo configuration +# +CONFIG_LOGO=y +# CONFIG_LOGO_LINUX_MONO is not set +# CONFIG_LOGO_LINUX_VGA16 is not set +# CONFIG_LOGO_LINUX_CLUT224 is not set +# CONFIG_LOGO_SUPERH_MONO is not set +# CONFIG_LOGO_SUPERH_VGA16 is not set +CONFIG_LOGO_SUPERH_CLUT224=y +# CONFIG_BACKLIGHT_LCD_SUPPORT is not set + +# +# Sound +# +# CONFIG_SOUND is not set + +# +# USB support +# +# CONFIG_USB is not set +CONFIG_USB_ARCH_HAS_HCD=y +CONFIG_USB_ARCH_HAS_OHCI=y + +# +# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support' may also be needed; see USB_STORAGE Help for more information +# + +# +# USB Gadget Support +# +# CONFIG_USB_GADGET is not set + +# +# MMC/SD Card support +# +# CONFIG_MMC is not set + +# +# InfiniBand support +# +# CONFIG_INFINIBAND is not set + +# +# File systems +# +CONFIG_EXT2_FS=y +# CONFIG_EXT2_FS_XATTR is not set +CONFIG_EXT3_FS=y +CONFIG_EXT3_FS_XATTR=y +# CONFIG_EXT3_FS_POSIX_ACL is not set +# CONFIG_EXT3_FS_SECURITY is not set +CONFIG_JBD=y +# CONFIG_JBD_DEBUG is not set +CONFIG_FS_MBCACHE=y +# CONFIG_REISERFS_FS is not set +# CONFIG_JFS_FS is not set + +# +# XFS support +# +# CONFIG_XFS_FS is not set +CONFIG_MINIX_FS=y +CONFIG_ROMFS_FS=y +# CONFIG_QUOTA is not set +CONFIG_DNOTIFY=y +# CONFIG_AUTOFS_FS is not set +# CONFIG_AUTOFS4_FS is not set + +# +# CD-ROM/DVD Filesystems +# +# CONFIG_ISO9660_FS is not set +# CONFIG_UDF_FS is not set + +# +# DOS/FAT/NT Filesystems +# +# CONFIG_MSDOS_FS is not set +# CONFIG_VFAT_FS is not set +# CONFIG_NTFS_FS is not set + +# +# Pseudo filesystems +# +CONFIG_PROC_FS=y +CONFIG_PROC_KCORE=y +CONFIG_SYSFS=y +# CONFIG_DEVFS_FS is not set +# CONFIG_DEVPTS_FS_XATTR is not set +CONFIG_TMPFS=y +# CONFIG_TMPFS_XATTR is not set +CONFIG_HUGETLBFS=y +CONFIG_HUGETLB_PAGE=y +CONFIG_RAMFS=y + +# +# Miscellaneous filesystems +# +# CONFIG_ADFS_FS is not set +# CONFIG_AFFS_FS is not set +# CONFIG_HFS_FS is not set +# CONFIG_HFSPLUS_FS is not set +# CONFIG_BEFS_FS is not set +# CONFIG_BFS_FS is not set +# CONFIG_EFS_FS is not set +# CONFIG_CRAMFS is not set +# CONFIG_VXFS_FS is not set +# CONFIG_HPFS_FS is not set +# CONFIG_QNX4FS_FS is not set +# CONFIG_SYSV_FS is not set +# CONFIG_UFS_FS is not set + +# +# Network File Systems +# +CONFIG_NFS_FS=y +CONFIG_NFS_V3=y +# CONFIG_NFS_V4 is not set +# CONFIG_NFS_DIRECTIO is not set +# CONFIG_NFSD is not set +CONFIG_ROOT_NFS=y +CONFIG_LOCKD=y +CONFIG_LOCKD_V4=y +CONFIG_SUNRPC=y +# CONFIG_RPCSEC_GSS_KRB5 is not set +# CONFIG_RPCSEC_GSS_SPKM3 is not set +# CONFIG_SMB_FS is not set +# CONFIG_CIFS is not set +# CONFIG_NCP_FS is not set +# CONFIG_CODA_FS is not set +# CONFIG_AFS_FS is not set + +# +# Partition Types +# +CONFIG_PARTITION_ADVANCED=y +# CONFIG_ACORN_PARTITION is not set +# CONFIG_OSF_PARTITION is not set +# CONFIG_AMIGA_PARTITION is not set +# CONFIG_ATARI_PARTITION is not set +# CONFIG_MAC_PARTITION is not set +CONFIG_MSDOS_PARTITION=y +# CONFIG_BSD_DISKLABEL is not set +# CONFIG_MINIX_SUBPARTITION is not set +# CONFIG_SOLARIS_X86_PARTITION is not set +# CONFIG_UNIXWARE_DISKLABEL is not set +# CONFIG_LDM_PARTITION is not set +# CONFIG_SGI_PARTITION is not set +# CONFIG_ULTRIX_PARTITION is not set +# CONFIG_SUN_PARTITION is not set +# CONFIG_EFI_PARTITION is not set + +# +# Native Language Support +# +# CONFIG_NLS is not set + +# +# Profiling support +# +# CONFIG_PROFILING is not set + +# +# Kernel hacking +# +CONFIG_DEBUG_KERNEL=y +CONFIG_MAGIC_SYSRQ=y +CONFIG_SCHEDSTATS=y +# CONFIG_DEBUG_SPINLOCK is not set +# CONFIG_DEBUG_KOBJECT is not set +CONFIG_DEBUG_FS=y +CONFIG_FRAME_POINTER=y +# CONFIG_EARLY_PRINTK is not set +# CONFIG_DEBUG_KERNEL_WITH_GDB_STUB is not set +CONFIG_SH64_PROC_TLB=y +CONFIG_SH64_PROC_ASIDS=y +CONFIG_SH64_SR_WATCH=y +# CONFIG_POOR_MANS_STRACE is not set +# CONFIG_SH_ALPHANUMERIC is not set +# CONFIG_SH_NO_BSS_INIT is not set + +# +# Security options +# +# CONFIG_KEYS is not set +# CONFIG_SECURITY is not set + +# +# Cryptographic options +# +# CONFIG_CRYPTO is not set + +# +# Hardware crypto devices +# + +# +# Library routines +# +# CONFIG_CRC_CCITT is not set +CONFIG_CRC32=y +# CONFIG_LIBCRC32C is not set +CONFIG_GENERIC_HARDIRQS=y +CONFIG_GENERIC_IRQ_PROBE=y diff --git a/arch/sh64/kernel/Makefile b/arch/sh64/kernel/Makefile new file mode 100644 index 0000000..5816657 --- /dev/null +++ b/arch/sh64/kernel/Makefile @@ -0,0 +1,36 @@ +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2000, 2001 Paolo Alberelli +# Copyright (C) 2003 Paul Mundt +# +# Makefile for the Linux sh64 kernel. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +extra-y := head.o init_task.o vmlinux.lds + +obj-y := process.o signal.o entry.o traps.o irq.o irq_intc.o \ + ptrace.o setup.o time.o sys_sh64.o semaphore.o sh_ksyms.o \ + switchto.o syscalls.o + +obj-$(CONFIG_HEARTBEAT) += led.o +obj-$(CONFIG_SH_ALPHANUMERIC) += alphanum.o +obj-$(CONFIG_SH_DMA) += dma.o +obj-$(CONFIG_SH_FPU) += fpu.o +obj-$(CONFIG_EARLY_PRINTK) += early_printk.o +obj-$(CONFIG_KALLSYMS) += unwind.o +obj-$(CONFIG_PCI) += pci-dma.o pcibios.o +obj-$(CONFIG_MODULES) += module.o + +ifeq ($(CONFIG_PCI),y) +obj-$(CONFIG_CPU_SH5) += pci_sh5.o +endif + +USE_STANDARD_AS_RULE := true + diff --git a/arch/sh64/kernel/alphanum.c b/arch/sh64/kernel/alphanum.c new file mode 100644 index 0000000..56d6f9f --- /dev/null +++ b/arch/sh64/kernel/alphanum.c @@ -0,0 +1,45 @@ +/* + * arch/sh64/kernel/alpanum.c + * + * Copyright (C) 2002 Stuart Menefy <stuart.menefy@st.com> + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * Machine-independent functions for handling 8-digit alphanumeric display + * (e.g. Agilent HDSP-253x) + */ +#include <linux/config.h> +#include <linux/stddef.h> +#include <linux/sched.h> + +void mach_alphanum(int pos, unsigned char val); +void mach_led(int pos, int val); + +void print_seg(char *file, int line) +{ + int i; + unsigned int nibble; + + for (i = 0; i < 5; i++) { + mach_alphanum(i, file[i]); + } + + for (i = 0; i < 3; i++) { + nibble = ((line >> (i * 4)) & 0xf); + mach_alphanum(7 - i, nibble + ((nibble > 9) ? 55 : 48)); + } +} + +void print_seg_num(unsigned num) +{ + int i; + unsigned int nibble; + + for (i = 0; i < 8; i++) { + nibble = ((num >> (i * 4)) & 0xf); + + mach_alphanum(7 - i, nibble + ((nibble > 9) ? 55 : 48)); + } +} + diff --git a/arch/sh64/kernel/asm-offsets.c b/arch/sh64/kernel/asm-offsets.c new file mode 100644 index 0000000..ca76537 --- /dev/null +++ b/arch/sh64/kernel/asm-offsets.c @@ -0,0 +1,33 @@ +/* + * This program is used to generate definitions needed by + * assembly language modules. + * + * We use the technique used in the OSF Mach kernel code: + * generate asm statements containing #defines, + * compile this file to assembler, and then extract the + * #defines from the assembly-language output. + */ + +#include <linux/stddef.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <asm/thread_info.h> + +#define DEFINE(sym, val) \ + asm volatile("\n->" #sym " %0 " #val : : "i" (val)) + +#define BLANK() asm volatile("\n->" : : ) + +int main(void) +{ + /* offsets into the thread_info struct */ + DEFINE(TI_TASK, offsetof(struct thread_info, task)); + DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain)); + DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); + DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count)); + DEFINE(TI_CPU, offsetof(struct thread_info, cpu)); + DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); + DEFINE(TI_RESTART_BLOCK,offsetof(struct thread_info, restart_block)); + + return 0; +} diff --git a/arch/sh64/kernel/dma.c b/arch/sh64/kernel/dma.c new file mode 100644 index 0000000..09cd9f4 --- /dev/null +++ b/arch/sh64/kernel/dma.c @@ -0,0 +1,297 @@ +/* + * arch/sh64/kernel/dma.c + * + * DMA routines for the SH-5 DMAC. + * + * Copyright (C) 2003 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/init.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/types.h> +#include <linux/irq.h> +#include <linux/spinlock.h> +#include <linux/mm.h> +#include <asm/hardware.h> +#include <asm/dma.h> +#include <asm/signal.h> +#include <asm/errno.h> +#include <asm/io.h> + +typedef struct { + unsigned long dev_addr; + unsigned long mem_addr; + + unsigned int mode; + unsigned int count; +} dma_info_t; + +static dma_info_t dma_info[MAX_DMA_CHANNELS]; +static DEFINE_SPINLOCK(dma_spin_lock); + +/* arch/sh64/kernel/irq_intc.c */ +extern void make_intc_irq(unsigned int irq); + +/* DMAC Interrupts */ +#define DMA_IRQ_DMTE0 18 +#define DMA_IRQ_DERR 22 + +#define DMAC_COMMON_BASE (dmac_base + 0x08) +#define DMAC_SAR_BASE (dmac_base + 0x10) +#define DMAC_DAR_BASE (dmac_base + 0x18) +#define DMAC_COUNT_BASE (dmac_base + 0x20) +#define DMAC_CTRL_BASE (dmac_base + 0x28) +#define DMAC_STATUS_BASE (dmac_base + 0x30) + +#define DMAC_SAR(n) (DMAC_SAR_BASE + ((n) * 0x28)) +#define DMAC_DAR(n) (DMAC_DAR_BASE + ((n) * 0x28)) +#define DMAC_COUNT(n) (DMAC_COUNT_BASE + ((n) * 0x28)) +#define DMAC_CTRL(n) (DMAC_CTRL_BASE + ((n) * 0x28)) +#define DMAC_STATUS(n) (DMAC_STATUS_BASE + ((n) * 0x28)) + +/* DMAC.COMMON Bit Definitions */ +#define DMAC_COMMON_PR 0x00000001 /* Priority */ + /* Bits 1-2 Reserved */ +#define DMAC_COMMON_ME 0x00000008 /* Master Enable */ +#define DMAC_COMMON_NMI 0x00000010 /* NMI Flag */ + /* Bits 5-6 Reserved */ +#define DMAC_COMMON_ER 0x00000780 /* Error Response */ +#define DMAC_COMMON_AAE 0x00007800 /* Address Alignment Error */ + /* Bits 15-63 Reserved */ + +/* DMAC.SAR Bit Definitions */ +#define DMAC_SAR_ADDR 0xffffffff /* Source Address */ + +/* DMAC.DAR Bit Definitions */ +#define DMAC_DAR_ADDR 0xffffffff /* Destination Address */ + +/* DMAC.COUNT Bit Definitions */ +#define DMAC_COUNT_CNT 0xffffffff /* Transfer Count */ + +/* DMAC.CTRL Bit Definitions */ +#define DMAC_CTRL_TS 0x00000007 /* Transfer Size */ +#define DMAC_CTRL_SI 0x00000018 /* Source Increment */ +#define DMAC_CTRL_DI 0x00000060 /* Destination Increment */ +#define DMAC_CTRL_RS 0x00000780 /* Resource Select */ +#define DMAC_CTRL_IE 0x00000800 /* Interrupt Enable */ +#define DMAC_CTRL_TE 0x00001000 /* Transfer Enable */ + /* Bits 15-63 Reserved */ + +/* DMAC.STATUS Bit Definitions */ +#define DMAC_STATUS_TE 0x00000001 /* Transfer End */ +#define DMAC_STATUS_AAE 0x00000002 /* Address Alignment Error */ + /* Bits 2-63 Reserved */ + +static unsigned long dmac_base; + +void set_dma_count(unsigned int chan, unsigned int count); +void set_dma_addr(unsigned int chan, unsigned int addr); + +static irqreturn_t dma_mte(int irq, void *dev_id, struct pt_regs *regs) +{ + unsigned int chan = irq - DMA_IRQ_DMTE0; + dma_info_t *info = dma_info + chan; + u64 status; + + if (info->mode & DMA_MODE_WRITE) { + sh64_out64(info->mem_addr & DMAC_SAR_ADDR, DMAC_SAR(chan)); + } else { + sh64_out64(info->mem_addr & DMAC_DAR_ADDR, DMAC_DAR(chan)); + } + + set_dma_count(chan, info->count); + + /* Clear the TE bit */ + status = sh64_in64(DMAC_STATUS(chan)); + status &= ~DMAC_STATUS_TE; + sh64_out64(status, DMAC_STATUS(chan)); + + return IRQ_HANDLED; +} + +static struct irqaction irq_dmte = { + .handler = dma_mte, + .flags = SA_INTERRUPT, + .name = "DMA MTE", +}; + +static irqreturn_t dma_err(int irq, void *dev_id, struct pt_regs *regs) +{ + u64 tmp; + u8 chan; + + printk(KERN_NOTICE "DMAC: Got a DMA Error!\n"); + + tmp = sh64_in64(DMAC_COMMON_BASE); + + /* Check for the type of error */ + if ((chan = tmp & DMAC_COMMON_AAE)) { + /* It's an address alignment error.. */ + printk(KERN_NOTICE "DMAC: Alignment error on channel %d, ", chan); + + printk(KERN_NOTICE "SAR: 0x%08llx, DAR: 0x%08llx, COUNT: %lld\n", + (sh64_in64(DMAC_SAR(chan)) & DMAC_SAR_ADDR), + (sh64_in64(DMAC_DAR(chan)) & DMAC_DAR_ADDR), + (sh64_in64(DMAC_COUNT(chan)) & DMAC_COUNT_CNT)); + + } else if ((chan = tmp & DMAC_COMMON_ER)) { + /* Something else went wrong.. */ + printk(KERN_NOTICE "DMAC: Error on channel %d\n", chan); + } + + /* Reset the ME bit to clear the interrupt */ + tmp |= DMAC_COMMON_ME; + sh64_out64(tmp, DMAC_COMMON_BASE); + + return IRQ_HANDLED; +} + +static struct irqaction irq_derr = { + .handler = dma_err, + .flags = SA_INTERRUPT, + .name = "DMA Error", +}; + +static inline unsigned long calc_xmit_shift(unsigned int chan) +{ + return sh64_in64(DMAC_CTRL(chan)) & 0x03; +} + +void setup_dma(unsigned int chan, dma_info_t *info) +{ + unsigned int irq = DMA_IRQ_DMTE0 + chan; + dma_info_t *dma = dma_info + chan; + + make_intc_irq(irq); + setup_irq(irq, &irq_dmte); + dma = info; +} + +void enable_dma(unsigned int chan) +{ + u64 ctrl; + + ctrl = sh64_in64(DMAC_CTRL(chan)); + ctrl |= DMAC_CTRL_TE; + sh64_out64(ctrl, DMAC_CTRL(chan)); +} + +void disable_dma(unsigned int chan) +{ + u64 ctrl; + + ctrl = sh64_in64(DMAC_CTRL(chan)); + ctrl &= ~DMAC_CTRL_TE; + sh64_out64(ctrl, DMAC_CTRL(chan)); +} + +void set_dma_mode(unsigned int chan, char mode) +{ + dma_info_t *info = dma_info + chan; + + info->mode = mode; + + set_dma_addr(chan, info->mem_addr); + set_dma_count(chan, info->count); +} + +void set_dma_addr(unsigned int chan, unsigned int addr) +{ + dma_info_t *info = dma_info + chan; + unsigned long sar, dar; + + info->mem_addr = addr; + sar = (info->mode & DMA_MODE_WRITE) ? info->mem_addr : info->dev_addr; + dar = (info->mode & DMA_MODE_WRITE) ? info->dev_addr : info->mem_addr; + + sh64_out64(sar & DMAC_SAR_ADDR, DMAC_SAR(chan)); + sh64_out64(dar & DMAC_SAR_ADDR, DMAC_DAR(chan)); +} + +void set_dma_count(unsigned int chan, unsigned int count) +{ + dma_info_t *info = dma_info + chan; + u64 tmp; + + info->count = count; + + tmp = (info->count >> calc_xmit_shift(chan)) & DMAC_COUNT_CNT; + + sh64_out64(tmp, DMAC_COUNT(chan)); +} + +unsigned long claim_dma_lock(void) +{ + unsigned long flags; + + spin_lock_irqsave(&dma_spin_lock, flags); + + return flags; +} + +void release_dma_lock(unsigned long flags) +{ + spin_unlock_irqrestore(&dma_spin_lock, flags); +} + +int get_dma_residue(unsigned int chan) +{ + return sh64_in64(DMAC_COUNT(chan) << calc_xmit_shift(chan)); +} + +int __init init_dma(void) +{ + struct vcr_info vcr; + u64 tmp; + + /* Remap the DMAC */ + dmac_base = onchip_remap(PHYS_DMAC_BLOCK, 1024, "DMAC"); + if (!dmac_base) { + printk(KERN_ERR "Unable to remap DMAC\n"); + return -ENOMEM; + } + + /* Report DMAC.VCR Info */ + vcr = sh64_get_vcr_info(dmac_base); + printk("DMAC: Module ID: 0x%04x, Module version: 0x%04x\n", + vcr.mod_id, vcr.mod_vers); + + /* Set the ME bit */ + tmp = sh64_in64(DMAC_COMMON_BASE); + tmp |= DMAC_COMMON_ME; + sh64_out64(tmp, DMAC_COMMON_BASE); + + /* Enable the DMAC Error Interrupt */ + make_intc_irq(DMA_IRQ_DERR); + setup_irq(DMA_IRQ_DERR, &irq_derr); + + return 0; +} + +static void __exit exit_dma(void) +{ + onchip_unmap(dmac_base); + free_irq(DMA_IRQ_DERR, 0); +} + +module_init(init_dma); +module_exit(exit_dma); + +MODULE_AUTHOR("Paul Mundt"); +MODULE_DESCRIPTION("DMA API for SH-5 DMAC"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(setup_dma); +EXPORT_SYMBOL(claim_dma_lock); +EXPORT_SYMBOL(release_dma_lock); +EXPORT_SYMBOL(enable_dma); +EXPORT_SYMBOL(disable_dma); +EXPORT_SYMBOL(set_dma_mode); +EXPORT_SYMBOL(set_dma_addr); +EXPORT_SYMBOL(set_dma_count); +EXPORT_SYMBOL(get_dma_residue); + diff --git a/arch/sh64/kernel/early_printk.c b/arch/sh64/kernel/early_printk.c new file mode 100644 index 0000000..8c8a76e --- /dev/null +++ b/arch/sh64/kernel/early_printk.c @@ -0,0 +1,105 @@ +/* + * arch/sh64/kernel/early_printk.c + * + * SH-5 Early SCIF console (cloned and hacked from sh implementation) + * + * Copyright (C) 2003, 2004 Paul Mundt <lethal@linux-sh.org> + * Copyright (C) 2002 M. R. Brown <mrbrown@0xd6.org> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/console.h> +#include <linux/tty.h> +#include <linux/init.h> +#include <asm/io.h> +#include <asm/hardware.h> + +#define SCIF_BASE_ADDR 0x01030000 +#define SCIF_ADDR_SH5 PHYS_PERIPHERAL_BLOCK+SCIF_BASE_ADDR + +/* + * Fixed virtual address where SCIF is mapped (should already be done + * in arch/sh64/kernel/head.S!). + */ +#define SCIF_REG 0xfa030000 + +enum { + SCIF_SCSMR2 = SCIF_REG + 0x00, + SCIF_SCBRR2 = SCIF_REG + 0x04, + SCIF_SCSCR2 = SCIF_REG + 0x08, + SCIF_SCFTDR2 = SCIF_REG + 0x0c, + SCIF_SCFSR2 = SCIF_REG + 0x10, + SCIF_SCFRDR2 = SCIF_REG + 0x14, + SCIF_SCFCR2 = SCIF_REG + 0x18, + SCIF_SCFDR2 = SCIF_REG + 0x1c, + SCIF_SCSPTR2 = SCIF_REG + 0x20, + SCIF_SCLSR2 = SCIF_REG + 0x24, +}; + +static void sh_console_putc(int c) +{ + while (!(ctrl_inw(SCIF_SCFSR2) & 0x20)) + cpu_relax(); + + ctrl_outb(c, SCIF_SCFTDR2); + ctrl_outw((ctrl_inw(SCIF_SCFSR2) & 0x9f), SCIF_SCFSR2); + + if (c == '\n') + sh_console_putc('\r'); +} + +static void sh_console_flush(void) +{ + ctrl_outw((ctrl_inw(SCIF_SCFSR2) & 0xbf), SCIF_SCFSR2); + + while (!(ctrl_inw(SCIF_SCFSR2) & 0x40)) + cpu_relax(); + + ctrl_outw((ctrl_inw(SCIF_SCFSR2) & 0xbf), SCIF_SCFSR2); +} + +static void sh_console_write(struct console *con, const char *s, unsigned count) +{ + while (count-- > 0) + sh_console_putc(*s++); + + sh_console_flush(); +} + +static int __init sh_console_setup(struct console *con, char *options) +{ + con->cflag = CREAD | HUPCL | CLOCAL | B19200 | CS8; + + return 0; +} + +static struct console sh_console = { + .name = "scifcon", + .write = sh_console_write, + .setup = sh_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, +}; + +void __init enable_early_printk(void) +{ + ctrl_outb(0x2a, SCIF_SCBRR2); /* 19200bps */ + + ctrl_outw(0x04, SCIF_SCFCR2); /* Reset TFRST */ + ctrl_outw(0x10, SCIF_SCFCR2); /* TTRG0=1 */ + + ctrl_outw(0, SCIF_SCSPTR2); + ctrl_outw(0x60, SCIF_SCFSR2); + ctrl_outw(0, SCIF_SCLSR2); + ctrl_outw(0x30, SCIF_SCSCR2); + + register_console(&sh_console); +} + +void disable_early_printk(void) +{ + unregister_console(&sh_console); +} + diff --git a/arch/sh64/kernel/entry.S b/arch/sh64/kernel/entry.S new file mode 100644 index 0000000..2e2cfe2 --- /dev/null +++ b/arch/sh64/kernel/entry.S @@ -0,0 +1,2103 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/entry.S + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2004, 2005 Paul Mundt + * Copyright (C) 2003, 2004 Richard Curnow + * + */ + +#include <linux/config.h> +#include <linux/errno.h> +#include <linux/sys.h> + +#include <asm/processor.h> +#include <asm/registers.h> +#include <asm/unistd.h> +#include <asm/thread_info.h> +#include <asm/asm-offsets.h> + +/* + * SR fields. + */ +#define SR_ASID_MASK 0x00ff0000 +#define SR_FD_MASK 0x00008000 +#define SR_SS 0x08000000 +#define SR_BL 0x10000000 +#define SR_MD 0x40000000 + +/* + * Event code. + */ +#define EVENT_INTERRUPT 0 +#define EVENT_FAULT_TLB 1 +#define EVENT_FAULT_NOT_TLB 2 +#define EVENT_DEBUG 3 + +/* EXPEVT values */ +#define RESET_CAUSE 0x20 +#define DEBUGSS_CAUSE 0x980 + +/* + * Frame layout. Quad index. + */ +#define FRAME_T(x) FRAME_TBASE+(x*8) +#define FRAME_R(x) FRAME_RBASE+(x*8) +#define FRAME_S(x) FRAME_SBASE+(x*8) +#define FSPC 0 +#define FSSR 1 +#define FSYSCALL_ID 2 + +/* Arrange the save frame to be a multiple of 32 bytes long */ +#define FRAME_SBASE 0 +#define FRAME_RBASE (FRAME_SBASE+(3*8)) /* SYSCALL_ID - SSR - SPC */ +#define FRAME_TBASE (FRAME_RBASE+(63*8)) /* r0 - r62 */ +#define FRAME_PBASE (FRAME_TBASE+(8*8)) /* tr0 -tr7 */ +#define FRAME_SIZE (FRAME_PBASE+(2*8)) /* pad0-pad1 */ + +#define FP_FRAME_SIZE FP_FRAME_BASE+(33*8) /* dr0 - dr31 + fpscr */ +#define FP_FRAME_BASE 0 + +#define SAVED_R2 0*8 +#define SAVED_R3 1*8 +#define SAVED_R4 2*8 +#define SAVED_R5 3*8 +#define SAVED_R18 4*8 +#define SAVED_R6 5*8 +#define SAVED_TR0 6*8 + +/* These are the registers saved in the TLB path that aren't saved in the first + level of the normal one. */ +#define TLB_SAVED_R25 7*8 +#define TLB_SAVED_TR1 8*8 +#define TLB_SAVED_TR2 9*8 +#define TLB_SAVED_TR3 10*8 +#define TLB_SAVED_TR4 11*8 +/* Save R0/R1 : PT-migrating compiler currently dishounours -ffixed-r0 and -ffixed-r1 causing + breakage otherwise. */ +#define TLB_SAVED_R0 12*8 +#define TLB_SAVED_R1 13*8 + +#define CLI() \ + getcon SR, r6; \ + ori r6, 0xf0, r6; \ + putcon r6, SR; + +#define STI() \ + getcon SR, r6; \ + andi r6, ~0xf0, r6; \ + putcon r6, SR; + +#ifdef CONFIG_PREEMPT +# define preempt_stop() CLI() +#else +# define preempt_stop() +# define resume_kernel restore_all +#endif + + .section .data, "aw" + +#define FAST_TLBMISS_STACK_CACHELINES 4 +#define FAST_TLBMISS_STACK_QUADWORDS (4*FAST_TLBMISS_STACK_CACHELINES) + +/* Register back-up area for all exceptions */ + .balign 32 + /* Allow for 16 quadwords to be pushed by fast tlbmiss handling + * register saves etc. */ + .fill FAST_TLBMISS_STACK_QUADWORDS, 8, 0x0 +/* This is 32 byte aligned by construction */ +/* Register back-up area for all exceptions */ +reg_save_area: + .quad 0 + .quad 0 + .quad 0 + .quad 0 + + .quad 0 + .quad 0 + .quad 0 + .quad 0 + + .quad 0 + .quad 0 + .quad 0 + .quad 0 + + .quad 0 + .quad 0 + +/* Save area for RESVEC exceptions. We cannot use reg_save_area because of + * reentrancy. Note this area may be accessed via physical address. + * Align so this fits a whole single cache line, for ease of purging. + */ + .balign 32,0,32 +resvec_save_area: + .quad 0 + .quad 0 + .quad 0 + .quad 0 + .quad 0 + .balign 32,0,32 + +/* Jump table of 3rd level handlers */ +trap_jtable: + .long do_exception_error /* 0x000 */ + .long do_exception_error /* 0x020 */ + .long tlb_miss_load /* 0x040 */ + .long tlb_miss_store /* 0x060 */ + ! ARTIFICIAL pseudo-EXPEVT setting + .long do_debug_interrupt /* 0x080 */ + .long tlb_miss_load /* 0x0A0 */ + .long tlb_miss_store /* 0x0C0 */ + .long do_address_error_load /* 0x0E0 */ + .long do_address_error_store /* 0x100 */ +#ifdef CONFIG_SH_FPU + .long do_fpu_error /* 0x120 */ +#else + .long do_exception_error /* 0x120 */ +#endif + .long do_exception_error /* 0x140 */ + .long system_call /* 0x160 */ + .long do_reserved_inst /* 0x180 */ + .long do_illegal_slot_inst /* 0x1A0 */ + .long do_NMI /* 0x1C0 */ + .long do_exception_error /* 0x1E0 */ + .rept 15 + .long do_IRQ /* 0x200 - 0x3C0 */ + .endr + .long do_exception_error /* 0x3E0 */ + .rept 32 + .long do_IRQ /* 0x400 - 0x7E0 */ + .endr + .long fpu_error_or_IRQA /* 0x800 */ + .long fpu_error_or_IRQB /* 0x820 */ + .long do_IRQ /* 0x840 */ + .long do_IRQ /* 0x860 */ + .rept 6 + .long do_exception_error /* 0x880 - 0x920 */ + .endr + .long do_software_break_point /* 0x940 */ + .long do_exception_error /* 0x960 */ + .long do_single_step /* 0x980 */ + + .rept 3 + .long do_exception_error /* 0x9A0 - 0x9E0 */ + .endr + .long do_IRQ /* 0xA00 */ + .long do_IRQ /* 0xA20 */ + .long itlb_miss_or_IRQ /* 0xA40 */ + .long do_IRQ /* 0xA60 */ + .long do_IRQ /* 0xA80 */ + .long itlb_miss_or_IRQ /* 0xAA0 */ + .long do_exception_error /* 0xAC0 */ + .long do_address_error_exec /* 0xAE0 */ + .rept 8 + .long do_exception_error /* 0xB00 - 0xBE0 */ + .endr + .rept 18 + .long do_IRQ /* 0xC00 - 0xE20 */ + .endr + + .section .text64, "ax" + +/* + * --- Exception/Interrupt/Event Handling Section + */ + +/* + * VBR and RESVEC blocks. + * + * First level handler for VBR-based exceptions. + * + * To avoid waste of space, align to the maximum text block size. + * This is assumed to be at most 128 bytes or 32 instructions. + * DO NOT EXCEED 32 instructions on the first level handlers ! + * + * Also note that RESVEC is contained within the VBR block + * where the room left (1KB - TEXT_SIZE) allows placing + * the RESVEC block (at most 512B + TEXT_SIZE). + * + * So first (and only) level handler for RESVEC-based exceptions. + * + * Where the fault/interrupt is handled (not_a_tlb_miss, tlb_miss + * and interrupt) we are a lot tight with register space until + * saving onto the stack frame, which is done in handle_exception(). + * + */ + +#define TEXT_SIZE 128 +#define BLOCK_SIZE 1664 /* Dynamic check, 13*128 */ + + .balign TEXT_SIZE +LVBR_block: + .space 256, 0 /* Power-on class handler, */ + /* not required here */ +not_a_tlb_miss: + synco /* TAKum03020 (but probably a good idea anyway.) */ + /* Save original stack pointer into KCR1 */ + putcon SP, KCR1 + + /* Save other original registers into reg_save_area */ + movi reg_save_area, SP + st.q SP, SAVED_R2, r2 + st.q SP, SAVED_R3, r3 + st.q SP, SAVED_R4, r4 + st.q SP, SAVED_R5, r5 + st.q SP, SAVED_R6, r6 + st.q SP, SAVED_R18, r18 + gettr tr0, r3 + st.q SP, SAVED_TR0, r3 + + /* Set args for Non-debug, Not a TLB miss class handler */ + getcon EXPEVT, r2 + movi ret_from_exception, r3 + ori r3, 1, r3 + movi EVENT_FAULT_NOT_TLB, r4 + or SP, ZERO, r5 + getcon KCR1, SP + pta handle_exception, tr0 + blink tr0, ZERO + + .balign 256 + ! VBR+0x200 + nop + .balign 256 + ! VBR+0x300 + nop + .balign 256 + /* + * Instead of the natural .balign 1024 place RESVEC here + * respecting the final 1KB alignment. + */ + .balign TEXT_SIZE + /* + * Instead of '.space 1024-TEXT_SIZE' place the RESVEC + * block making sure the final alignment is correct. + */ +tlb_miss: + synco /* TAKum03020 (but probably a good idea anyway.) */ + putcon SP, KCR1 + movi reg_save_area, SP + /* SP is guaranteed 32-byte aligned. */ + st.q SP, TLB_SAVED_R0 , r0 + st.q SP, TLB_SAVED_R1 , r1 + st.q SP, SAVED_R2 , r2 + st.q SP, SAVED_R3 , r3 + st.q SP, SAVED_R4 , r4 + st.q SP, SAVED_R5 , r5 + st.q SP, SAVED_R6 , r6 + st.q SP, SAVED_R18, r18 + + /* Save R25 for safety; as/ld may want to use it to achieve the call to + * the code in mm/tlbmiss.c */ + st.q SP, TLB_SAVED_R25, r25 + gettr tr0, r2 + gettr tr1, r3 + gettr tr2, r4 + gettr tr3, r5 + gettr tr4, r18 + st.q SP, SAVED_TR0 , r2 + st.q SP, TLB_SAVED_TR1 , r3 + st.q SP, TLB_SAVED_TR2 , r4 + st.q SP, TLB_SAVED_TR3 , r5 + st.q SP, TLB_SAVED_TR4 , r18 + + pt do_fast_page_fault, tr0 + getcon SSR, r2 + getcon EXPEVT, r3 + getcon TEA, r4 + shlri r2, 30, r2 + andi r2, 1, r2 /* r2 = SSR.MD */ + blink tr0, LINK + + pt fixup_to_invoke_general_handler, tr1 + + /* If the fast path handler fixed the fault, just drop through quickly + to the restore code right away to return to the excepting context. + */ + beqi/u r2, 0, tr1 + +fast_tlb_miss_restore: + ld.q SP, SAVED_TR0, r2 + ld.q SP, TLB_SAVED_TR1, r3 + ld.q SP, TLB_SAVED_TR2, r4 + + ld.q SP, TLB_SAVED_TR3, r5 + ld.q SP, TLB_SAVED_TR4, r18 + + ptabs r2, tr0 + ptabs r3, tr1 + ptabs r4, tr2 + ptabs r5, tr3 + ptabs r18, tr4 + + ld.q SP, TLB_SAVED_R0, r0 + ld.q SP, TLB_SAVED_R1, r1 + ld.q SP, SAVED_R2, r2 + ld.q SP, SAVED_R3, r3 + ld.q SP, SAVED_R4, r4 + ld.q SP, SAVED_R5, r5 + ld.q SP, SAVED_R6, r6 + ld.q SP, SAVED_R18, r18 + ld.q SP, TLB_SAVED_R25, r25 + + getcon KCR1, SP + rte + nop /* for safety, in case the code is run on sh5-101 cut1.x */ + +fixup_to_invoke_general_handler: + + /* OK, new method. Restore stuff that's not expected to get saved into + the 'first-level' reg save area, then just fall through to setting + up the registers and calling the second-level handler. */ + + /* 2nd level expects r2,3,4,5,6,18,tr0 to be saved. So we must restore + r25,tr1-4 and save r6 to get into the right state. */ + + ld.q SP, TLB_SAVED_TR1, r3 + ld.q SP, TLB_SAVED_TR2, r4 + ld.q SP, TLB_SAVED_TR3, r5 + ld.q SP, TLB_SAVED_TR4, r18 + ld.q SP, TLB_SAVED_R25, r25 + + ld.q SP, TLB_SAVED_R0, r0 + ld.q SP, TLB_SAVED_R1, r1 + + ptabs/u r3, tr1 + ptabs/u r4, tr2 + ptabs/u r5, tr3 + ptabs/u r18, tr4 + + /* Set args for Non-debug, TLB miss class handler */ + getcon EXPEVT, r2 + movi ret_from_exception, r3 + ori r3, 1, r3 + movi EVENT_FAULT_TLB, r4 + or SP, ZERO, r5 + getcon KCR1, SP + pta handle_exception, tr0 + blink tr0, ZERO + +/* NB TAKE GREAT CARE HERE TO ENSURE THAT THE INTERRUPT CODE + DOES END UP AT VBR+0x600 */ + nop + nop + nop + nop + nop + nop + + .balign 256 + /* VBR + 0x600 */ + +interrupt: + synco /* TAKum03020 (but probably a good idea anyway.) */ + /* Save original stack pointer into KCR1 */ + putcon SP, KCR1 + + /* Save other original registers into reg_save_area */ + movi reg_save_area, SP + st.q SP, SAVED_R2, r2 + st.q SP, SAVED_R3, r3 + st.q SP, SAVED_R4, r4 + st.q SP, SAVED_R5, r5 + st.q SP, SAVED_R6, r6 + st.q SP, SAVED_R18, r18 + gettr tr0, r3 + st.q SP, SAVED_TR0, r3 + + /* Set args for interrupt class handler */ + getcon INTEVT, r2 + movi ret_from_irq, r3 + ori r3, 1, r3 + movi EVENT_INTERRUPT, r4 + or SP, ZERO, r5 + getcon KCR1, SP + pta handle_exception, tr0 + blink tr0, ZERO + .balign TEXT_SIZE /* let's waste the bare minimum */ + +LVBR_block_end: /* Marker. Used for total checking */ + + .balign 256 +LRESVEC_block: + /* Panic handler. Called with MMU off. Possible causes/actions: + * - Reset: Jump to program start. + * - Single Step: Turn off Single Step & return. + * - Others: Call panic handler, passing PC as arg. + * (this may need to be extended...) + */ +reset_or_panic: + synco /* TAKum03020 (but probably a good idea anyway.) */ + putcon SP, DCR + /* First save r0-1 and tr0, as we need to use these */ + movi resvec_save_area-CONFIG_CACHED_MEMORY_OFFSET, SP + st.q SP, 0, r0 + st.q SP, 8, r1 + gettr tr0, r0 + st.q SP, 32, r0 + + /* Check cause */ + getcon EXPEVT, r0 + movi RESET_CAUSE, r1 + sub r1, r0, r1 /* r1=0 if reset */ + movi _stext-CONFIG_CACHED_MEMORY_OFFSET, r0 + ori r0, 1, r0 + ptabs r0, tr0 + beqi r1, 0, tr0 /* Jump to start address if reset */ + + getcon EXPEVT, r0 + movi DEBUGSS_CAUSE, r1 + sub r1, r0, r1 /* r1=0 if single step */ + pta single_step_panic, tr0 + beqi r1, 0, tr0 /* jump if single step */ + + /* Now jump to where we save the registers. */ + movi panic_stash_regs-CONFIG_CACHED_MEMORY_OFFSET, r1 + ptabs r1, tr0 + blink tr0, r63 + +single_step_panic: + /* We are in a handler with Single Step set. We need to resume the + * handler, by turning on MMU & turning off Single Step. */ + getcon SSR, r0 + movi SR_MMU, r1 + or r0, r1, r0 + movi ~SR_SS, r1 + and r0, r1, r0 + putcon r0, SSR + /* Restore EXPEVT, as the rte won't do this */ + getcon PEXPEVT, r0 + putcon r0, EXPEVT + /* Restore regs */ + ld.q SP, 32, r0 + ptabs r0, tr0 + ld.q SP, 0, r0 + ld.q SP, 8, r1 + getcon DCR, SP + synco + rte + + + .balign 256 +debug_exception: + synco /* TAKum03020 (but probably a good idea anyway.) */ + /* + * Single step/software_break_point first level handler. + * Called with MMU off, so the first thing we do is enable it + * by doing an rte with appropriate SSR. + */ + putcon SP, DCR + /* Save SSR & SPC, together with R0 & R1, as we need to use 2 regs. */ + movi resvec_save_area-CONFIG_CACHED_MEMORY_OFFSET, SP + + /* With the MMU off, we are bypassing the cache, so purge any + * data that will be made stale by the following stores. + */ + ocbp SP, 0 + synco + + st.q SP, 0, r0 + st.q SP, 8, r1 + getcon SPC, r0 + st.q SP, 16, r0 + getcon SSR, r0 + st.q SP, 24, r0 + + /* Enable MMU, block exceptions, set priv mode, disable single step */ + movi SR_MMU | SR_BL | SR_MD, r1 + or r0, r1, r0 + movi ~SR_SS, r1 + and r0, r1, r0 + putcon r0, SSR + /* Force control to debug_exception_2 when rte is executed */ + movi debug_exeception_2, r0 + ori r0, 1, r0 /* force SHmedia, just in case */ + putcon r0, SPC + getcon DCR, SP + synco + rte +debug_exeception_2: + /* Restore saved regs */ + putcon SP, KCR1 + movi resvec_save_area, SP + ld.q SP, 24, r0 + putcon r0, SSR + ld.q SP, 16, r0 + putcon r0, SPC + ld.q SP, 0, r0 + ld.q SP, 8, r1 + + /* Save other original registers into reg_save_area */ + movi reg_save_area, SP + st.q SP, SAVED_R2, r2 + st.q SP, SAVED_R3, r3 + st.q SP, SAVED_R4, r4 + st.q SP, SAVED_R5, r5 + st.q SP, SAVED_R6, r6 + st.q SP, SAVED_R18, r18 + gettr tr0, r3 + st.q SP, SAVED_TR0, r3 + + /* Set args for debug class handler */ + getcon EXPEVT, r2 + movi ret_from_exception, r3 + ori r3, 1, r3 + movi EVENT_DEBUG, r4 + or SP, ZERO, r5 + getcon KCR1, SP + pta handle_exception, tr0 + blink tr0, ZERO + + .balign 256 +debug_interrupt: + /* !!! WE COME HERE IN REAL MODE !!! */ + /* Hook-up debug interrupt to allow various debugging options to be + * hooked into its handler. */ + /* Save original stack pointer into KCR1 */ + synco + putcon SP, KCR1 + movi resvec_save_area-CONFIG_CACHED_MEMORY_OFFSET, SP + ocbp SP, 0 + ocbp SP, 32 + synco + + /* Save other original registers into reg_save_area thru real addresses */ + st.q SP, SAVED_R2, r2 + st.q SP, SAVED_R3, r3 + st.q SP, SAVED_R4, r4 + st.q SP, SAVED_R5, r5 + st.q SP, SAVED_R6, r6 + st.q SP, SAVED_R18, r18 + gettr tr0, r3 + st.q SP, SAVED_TR0, r3 + + /* move (spc,ssr)->(pspc,pssr). The rte will shift + them back again, so that they look like the originals + as far as the real handler code is concerned. */ + getcon spc, r6 + putcon r6, pspc + getcon ssr, r6 + putcon r6, pssr + + ! construct useful SR for handle_exception + movi 3, r6 + shlli r6, 30, r6 + getcon sr, r18 + or r18, r6, r6 + putcon r6, ssr + + ! SSR is now the current SR with the MD and MMU bits set + ! i.e. the rte will switch back to priv mode and put + ! the mmu back on + + ! construct spc + movi handle_exception, r18 + ori r18, 1, r18 ! for safety (do we need this?) + putcon r18, spc + + /* Set args for Non-debug, Not a TLB miss class handler */ + + ! EXPEVT==0x80 is unused, so 'steal' this value to put the + ! debug interrupt handler in the vectoring table + movi 0x80, r2 + movi ret_from_exception, r3 + ori r3, 1, r3 + movi EVENT_FAULT_NOT_TLB, r4 + + or SP, ZERO, r5 + movi CONFIG_CACHED_MEMORY_OFFSET, r6 + add r6, r5, r5 + getcon KCR1, SP + + synco ! for safety + rte ! -> handle_exception, switch back to priv mode again + +LRESVEC_block_end: /* Marker. Unused. */ + + .balign TEXT_SIZE + +/* + * Second level handler for VBR-based exceptions. Pre-handler. + * In common to all stack-frame sensitive handlers. + * + * Inputs: + * (KCR0) Current [current task union] + * (KCR1) Original SP + * (r2) INTEVT/EXPEVT + * (r3) appropriate return address + * (r4) Event (0 = interrupt, 1 = TLB miss fault, 2 = Not TLB miss fault, 3=debug) + * (r5) Pointer to reg_save_area + * (SP) Original SP + * + * Available registers: + * (r6) + * (r18) + * (tr0) + * + */ +handle_exception: + /* Common 2nd level handler. */ + + /* First thing we need an appropriate stack pointer */ + getcon SSR, r6 + shlri r6, 30, r6 + andi r6, 1, r6 + pta stack_ok, tr0 + bne r6, ZERO, tr0 /* Original stack pointer is fine */ + + /* Set stack pointer for user fault */ + getcon KCR0, SP + movi THREAD_SIZE, r6 /* Point to the end */ + add SP, r6, SP + +stack_ok: + +/* DEBUG : check for underflow/overflow of the kernel stack */ + pta no_underflow, tr0 + getcon KCR0, r6 + movi 1024, r18 + add r6, r18, r6 + bge SP, r6, tr0 ! ? below 1k from bottom of stack : danger zone + +/* Just panic to cause a crash. */ +bad_sp: + ld.b r63, 0, r6 + nop + +no_underflow: + pta bad_sp, tr0 + getcon kcr0, r6 + movi THREAD_SIZE, r18 + add r18, r6, r6 + bgt SP, r6, tr0 ! sp above the stack + + /* Make some room for the BASIC frame. */ + movi -(FRAME_SIZE), r6 + add SP, r6, SP + +/* Could do this with no stalling if we had another spare register, but the + code below will be OK. */ + ld.q r5, SAVED_R2, r6 + ld.q r5, SAVED_R3, r18 + st.q SP, FRAME_R(2), r6 + ld.q r5, SAVED_R4, r6 + st.q SP, FRAME_R(3), r18 + ld.q r5, SAVED_R5, r18 + st.q SP, FRAME_R(4), r6 + ld.q r5, SAVED_R6, r6 + st.q SP, FRAME_R(5), r18 + ld.q r5, SAVED_R18, r18 + st.q SP, FRAME_R(6), r6 + ld.q r5, SAVED_TR0, r6 + st.q SP, FRAME_R(18), r18 + st.q SP, FRAME_T(0), r6 + + /* Keep old SP around */ + getcon KCR1, r6 + + /* Save the rest of the general purpose registers */ + st.q SP, FRAME_R(0), r0 + st.q SP, FRAME_R(1), r1 + st.q SP, FRAME_R(7), r7 + st.q SP, FRAME_R(8), r8 + st.q SP, FRAME_R(9), r9 + st.q SP, FRAME_R(10), r10 + st.q SP, FRAME_R(11), r11 + st.q SP, FRAME_R(12), r12 + st.q SP, FRAME_R(13), r13 + st.q SP, FRAME_R(14), r14 + + /* SP is somewhere else */ + st.q SP, FRAME_R(15), r6 + + st.q SP, FRAME_R(16), r16 + st.q SP, FRAME_R(17), r17 + /* r18 is saved earlier. */ + st.q SP, FRAME_R(19), r19 + st.q SP, FRAME_R(20), r20 + st.q SP, FRAME_R(21), r21 + st.q SP, FRAME_R(22), r22 + st.q SP, FRAME_R(23), r23 + st.q SP, FRAME_R(24), r24 + st.q SP, FRAME_R(25), r25 + st.q SP, FRAME_R(26), r26 + st.q SP, FRAME_R(27), r27 + st.q SP, FRAME_R(28), r28 + st.q SP, FRAME_R(29), r29 + st.q SP, FRAME_R(30), r30 + st.q SP, FRAME_R(31), r31 + st.q SP, FRAME_R(32), r32 + st.q SP, FRAME_R(33), r33 + st.q SP, FRAME_R(34), r34 + st.q SP, FRAME_R(35), r35 + st.q SP, FRAME_R(36), r36 + st.q SP, FRAME_R(37), r37 + st.q SP, FRAME_R(38), r38 + st.q SP, FRAME_R(39), r39 + st.q SP, FRAME_R(40), r40 + st.q SP, FRAME_R(41), r41 + st.q SP, FRAME_R(42), r42 + st.q SP, FRAME_R(43), r43 + st.q SP, FRAME_R(44), r44 + st.q SP, FRAME_R(45), r45 + st.q SP, FRAME_R(46), r46 + st.q SP, FRAME_R(47), r47 + st.q SP, FRAME_R(48), r48 + st.q SP, FRAME_R(49), r49 + st.q SP, FRAME_R(50), r50 + st.q SP, FRAME_R(51), r51 + st.q SP, FRAME_R(52), r52 + st.q SP, FRAME_R(53), r53 + st.q SP, FRAME_R(54), r54 + st.q SP, FRAME_R(55), r55 + st.q SP, FRAME_R(56), r56 + st.q SP, FRAME_R(57), r57 + st.q SP, FRAME_R(58), r58 + st.q SP, FRAME_R(59), r59 + st.q SP, FRAME_R(60), r60 + st.q SP, FRAME_R(61), r61 + st.q SP, FRAME_R(62), r62 + + /* + * Save the S* registers. + */ + getcon SSR, r61 + st.q SP, FRAME_S(FSSR), r61 + getcon SPC, r62 + st.q SP, FRAME_S(FSPC), r62 + movi -1, r62 /* Reset syscall_nr */ + st.q SP, FRAME_S(FSYSCALL_ID), r62 + + /* Save the rest of the target registers */ + gettr tr1, r6 + st.q SP, FRAME_T(1), r6 + gettr tr2, r6 + st.q SP, FRAME_T(2), r6 + gettr tr3, r6 + st.q SP, FRAME_T(3), r6 + gettr tr4, r6 + st.q SP, FRAME_T(4), r6 + gettr tr5, r6 + st.q SP, FRAME_T(5), r6 + gettr tr6, r6 + st.q SP, FRAME_T(6), r6 + gettr tr7, r6 + st.q SP, FRAME_T(7), r6 + + ! setup FP so that unwinder can wind back through nested kernel mode + ! exceptions + add SP, ZERO, r14 + +#ifdef CONFIG_POOR_MANS_STRACE + /* We've pushed all the registers now, so only r2-r4 hold anything + * useful. Move them into callee save registers */ + or r2, ZERO, r28 + or r3, ZERO, r29 + or r4, ZERO, r30 + + /* Preserve r2 as the event code */ + movi evt_debug, r3 + ori r3, 1, r3 + ptabs r3, tr0 + + or SP, ZERO, r6 + getcon TRA, r5 + blink tr0, LINK + + or r28, ZERO, r2 + or r29, ZERO, r3 + or r30, ZERO, r4 +#endif + + /* For syscall and debug race condition, get TRA now */ + getcon TRA, r5 + + /* We are in a safe position to turn SR.BL off, but set IMASK=0xf + * Also set FD, to catch FPU usage in the kernel. + * + * benedict.gaster@superh.com 29/07/2002 + * + * On all SH5-101 revisions it is unsafe to raise the IMASK and at the + * same time change BL from 1->0, as any pending interrupt of a level + * higher than he previous value of IMASK will leak through and be + * taken unexpectedly. + * + * To avoid this we raise the IMASK and then issue another PUTCON to + * enable interrupts. + */ + getcon SR, r6 + movi SR_IMASK | SR_FD, r7 + or r6, r7, r6 + putcon r6, SR + movi SR_UNBLOCK_EXC, r7 + and r6, r7, r6 + putcon r6, SR + + + /* Now call the appropriate 3rd level handler */ + or r3, ZERO, LINK + movi trap_jtable, r3 + shlri r2, 3, r2 + ldx.l r2, r3, r3 + shlri r2, 2, r2 + ptabs r3, tr0 + or SP, ZERO, r3 + blink tr0, ZERO + +/* + * Second level handler for VBR-based exceptions. Post-handlers. + * + * Post-handlers for interrupts (ret_from_irq), exceptions + * (ret_from_exception) and common reentrance doors (restore_all + * to get back to the original context, ret_from_syscall loop to + * check kernel exiting). + * + * ret_with_reschedule and work_notifysig are an inner lables of + * the ret_from_syscall loop. + * + * In common to all stack-frame sensitive handlers. + * + * Inputs: + * (SP) struct pt_regs *, original register's frame pointer (basic) + * + */ + .global ret_from_irq +ret_from_irq: +#ifdef CONFIG_POOR_MANS_STRACE + pta evt_debug_ret_from_irq, tr0 + ori SP, 0, r2 + blink tr0, LINK +#endif + ld.q SP, FRAME_S(FSSR), r6 + shlri r6, 30, r6 + andi r6, 1, r6 + pta resume_kernel, tr0 + bne r6, ZERO, tr0 /* no further checks */ + STI() + pta ret_with_reschedule, tr0 + blink tr0, ZERO /* Do not check softirqs */ + + .global ret_from_exception +ret_from_exception: + preempt_stop() + +#ifdef CONFIG_POOR_MANS_STRACE + pta evt_debug_ret_from_exc, tr0 + ori SP, 0, r2 + blink tr0, LINK +#endif + + ld.q SP, FRAME_S(FSSR), r6 + shlri r6, 30, r6 + andi r6, 1, r6 + pta resume_kernel, tr0 + bne r6, ZERO, tr0 /* no further checks */ + + /* Check softirqs */ + +#ifdef CONFIG_PREEMPT + pta ret_from_syscall, tr0 + blink tr0, ZERO + +resume_kernel: + pta restore_all, tr0 + + getcon KCR0, r6 + ld.l r6, TI_PRE_COUNT, r7 + beq/u r7, ZERO, tr0 + +need_resched: + ld.l r6, TI_FLAGS, r7 + movi (1 << TIF_NEED_RESCHED), r8 + and r8, r7, r8 + bne r8, ZERO, tr0 + + getcon SR, r7 + andi r7, 0xf0, r7 + bne r7, ZERO, tr0 + + movi ((PREEMPT_ACTIVE >> 16) & 65535), r8 + shori (PREEMPT_ACTIVE & 65535), r8 + st.l r6, TI_PRE_COUNT, r8 + + STI() + movi schedule, r7 + ori r7, 1, r7 + ptabs r7, tr1 + blink tr1, LINK + + st.l r6, TI_PRE_COUNT, ZERO + CLI() + + pta need_resched, tr1 + blink tr1, ZERO +#endif + + .global ret_from_syscall +ret_from_syscall: + +ret_with_reschedule: + getcon KCR0, r6 ! r6 contains current_thread_info + ld.l r6, TI_FLAGS, r7 ! r7 contains current_thread_info->flags + + ! FIXME:!!! + ! no handling of TIF_SYSCALL_TRACE yet!! + + movi (1 << TIF_NEED_RESCHED), r8 + and r8, r7, r8 + pta work_resched, tr0 + bne r8, ZERO, tr0 + + pta restore_all, tr1 + + movi (1 << TIF_SIGPENDING), r8 + and r8, r7, r8 + pta work_notifysig, tr0 + bne r8, ZERO, tr0 + + blink tr1, ZERO + +work_resched: + pta ret_from_syscall, tr0 + gettr tr0, LINK + movi schedule, r6 + ptabs r6, tr0 + blink tr0, ZERO /* Call schedule(), return on top */ + +work_notifysig: + gettr tr1, LINK + + movi do_signal, r6 + ptabs r6, tr0 + or SP, ZERO, r2 + or ZERO, ZERO, r3 + blink tr0, LINK /* Call do_signal(regs, 0), return here */ + +restore_all: + /* Do prefetches */ + + ld.q SP, FRAME_T(0), r6 + ld.q SP, FRAME_T(1), r7 + ld.q SP, FRAME_T(2), r8 + ld.q SP, FRAME_T(3), r9 + ptabs r6, tr0 + ptabs r7, tr1 + ptabs r8, tr2 + ptabs r9, tr3 + ld.q SP, FRAME_T(4), r6 + ld.q SP, FRAME_T(5), r7 + ld.q SP, FRAME_T(6), r8 + ld.q SP, FRAME_T(7), r9 + ptabs r6, tr4 + ptabs r7, tr5 + ptabs r8, tr6 + ptabs r9, tr7 + + ld.q SP, FRAME_R(0), r0 + ld.q SP, FRAME_R(1), r1 + ld.q SP, FRAME_R(2), r2 + ld.q SP, FRAME_R(3), r3 + ld.q SP, FRAME_R(4), r4 + ld.q SP, FRAME_R(5), r5 + ld.q SP, FRAME_R(6), r6 + ld.q SP, FRAME_R(7), r7 + ld.q SP, FRAME_R(8), r8 + ld.q SP, FRAME_R(9), r9 + ld.q SP, FRAME_R(10), r10 + ld.q SP, FRAME_R(11), r11 + ld.q SP, FRAME_R(12), r12 + ld.q SP, FRAME_R(13), r13 + ld.q SP, FRAME_R(14), r14 + + ld.q SP, FRAME_R(16), r16 + ld.q SP, FRAME_R(17), r17 + ld.q SP, FRAME_R(18), r18 + ld.q SP, FRAME_R(19), r19 + ld.q SP, FRAME_R(20), r20 + ld.q SP, FRAME_R(21), r21 + ld.q SP, FRAME_R(22), r22 + ld.q SP, FRAME_R(23), r23 + ld.q SP, FRAME_R(24), r24 + ld.q SP, FRAME_R(25), r25 + ld.q SP, FRAME_R(26), r26 + ld.q SP, FRAME_R(27), r27 + ld.q SP, FRAME_R(28), r28 + ld.q SP, FRAME_R(29), r29 + ld.q SP, FRAME_R(30), r30 + ld.q SP, FRAME_R(31), r31 + ld.q SP, FRAME_R(32), r32 + ld.q SP, FRAME_R(33), r33 + ld.q SP, FRAME_R(34), r34 + ld.q SP, FRAME_R(35), r35 + ld.q SP, FRAME_R(36), r36 + ld.q SP, FRAME_R(37), r37 + ld.q SP, FRAME_R(38), r38 + ld.q SP, FRAME_R(39), r39 + ld.q SP, FRAME_R(40), r40 + ld.q SP, FRAME_R(41), r41 + ld.q SP, FRAME_R(42), r42 + ld.q SP, FRAME_R(43), r43 + ld.q SP, FRAME_R(44), r44 + ld.q SP, FRAME_R(45), r45 + ld.q SP, FRAME_R(46), r46 + ld.q SP, FRAME_R(47), r47 + ld.q SP, FRAME_R(48), r48 + ld.q SP, FRAME_R(49), r49 + ld.q SP, FRAME_R(50), r50 + ld.q SP, FRAME_R(51), r51 + ld.q SP, FRAME_R(52), r52 + ld.q SP, FRAME_R(53), r53 + ld.q SP, FRAME_R(54), r54 + ld.q SP, FRAME_R(55), r55 + ld.q SP, FRAME_R(56), r56 + ld.q SP, FRAME_R(57), r57 + ld.q SP, FRAME_R(58), r58 + + getcon SR, r59 + movi SR_BLOCK_EXC, r60 + or r59, r60, r59 + putcon r59, SR /* SR.BL = 1, keep nesting out */ + ld.q SP, FRAME_S(FSSR), r61 + ld.q SP, FRAME_S(FSPC), r62 + movi SR_ASID_MASK, r60 + and r59, r60, r59 + andc r61, r60, r61 /* Clear out older ASID */ + or r59, r61, r61 /* Retain current ASID */ + putcon r61, SSR + putcon r62, SPC + + /* Ignore FSYSCALL_ID */ + + ld.q SP, FRAME_R(59), r59 + ld.q SP, FRAME_R(60), r60 + ld.q SP, FRAME_R(61), r61 + ld.q SP, FRAME_R(62), r62 + + /* Last touch */ + ld.q SP, FRAME_R(15), SP + rte + nop + +/* + * Third level handlers for VBR-based exceptions. Adapting args to + * and/or deflecting to fourth level handlers. + * + * Fourth level handlers interface. + * Most are C-coded handlers directly pointed by the trap_jtable. + * (Third = Fourth level) + * Inputs: + * (r2) fault/interrupt code, entry number (e.g. NMI = 14, + * IRL0-3 (0000) = 16, RTLBMISS = 2, SYSCALL = 11, etc ...) + * (r3) struct pt_regs *, original register's frame pointer + * (r4) Event (0 = interrupt, 1 = TLB miss fault, 2 = Not TLB miss fault) + * (r5) TRA control register (for syscall/debug benefit only) + * (LINK) return address + * (SP) = r3 + * + * Kernel TLB fault handlers will get a slightly different interface. + * (r2) struct pt_regs *, original register's frame pointer + * (r3) writeaccess, whether it's a store fault as opposed to load fault + * (r4) execaccess, whether it's a ITLB fault as opposed to DTLB fault + * (r5) Effective Address of fault + * (LINK) return address + * (SP) = r2 + * + * fpu_error_or_IRQ? is a helper to deflect to the right cause. + * + */ +tlb_miss_load: + or SP, ZERO, r2 + or ZERO, ZERO, r3 /* Read */ + or ZERO, ZERO, r4 /* Data */ + getcon TEA, r5 + pta call_do_page_fault, tr0 + beq ZERO, ZERO, tr0 + +tlb_miss_store: + or SP, ZERO, r2 + movi 1, r3 /* Write */ + or ZERO, ZERO, r4 /* Data */ + getcon TEA, r5 + pta call_do_page_fault, tr0 + beq ZERO, ZERO, tr0 + +itlb_miss_or_IRQ: + pta its_IRQ, tr0 + beqi/u r4, EVENT_INTERRUPT, tr0 + or SP, ZERO, r2 + or ZERO, ZERO, r3 /* Read */ + movi 1, r4 /* Text */ + getcon TEA, r5 + /* Fall through */ + +call_do_page_fault: + movi do_page_fault, r6 + ptabs r6, tr0 + blink tr0, ZERO + +fpu_error_or_IRQA: + pta its_IRQ, tr0 + beqi/l r4, EVENT_INTERRUPT, tr0 +#ifdef CONFIG_SH_FPU + movi do_fpu_state_restore, r6 +#else + movi do_exception_error, r6 +#endif + ptabs r6, tr0 + blink tr0, ZERO + +fpu_error_or_IRQB: + pta its_IRQ, tr0 + beqi/l r4, EVENT_INTERRUPT, tr0 +#ifdef CONFIG_SH_FPU + movi do_fpu_state_restore, r6 +#else + movi do_exception_error, r6 +#endif + ptabs r6, tr0 + blink tr0, ZERO + +its_IRQ: + movi do_IRQ, r6 + ptabs r6, tr0 + blink tr0, ZERO + +/* + * system_call/unknown_trap third level handler: + * + * Inputs: + * (r2) fault/interrupt code, entry number (TRAP = 11) + * (r3) struct pt_regs *, original register's frame pointer + * (r4) Not used. Event (0=interrupt, 1=TLB miss fault, 2=Not TLB miss fault) + * (r5) TRA Control Reg (0x00xyzzzz: x=1 SYSCALL, y = #args, z=nr) + * (SP) = r3 + * (LINK) return address: ret_from_exception + * (*r3) Syscall parms: SC#, arg0, arg1, ..., arg5 in order (Saved r2/r7) + * + * Outputs: + * (*r3) Syscall reply (Saved r2) + * (LINK) In case of syscall only it can be scrapped. + * Common second level post handler will be ret_from_syscall. + * Common (non-trace) exit point to that is syscall_ret (saving + * result to r2). Common bad exit point is syscall_bad (returning + * ENOSYS then saved to r2). + * + */ + +unknown_trap: + /* Unknown Trap or User Trace */ + movi do_unknown_trapa, r6 + ptabs r6, tr0 + ld.q r3, FRAME_R(9), r2 /* r2 = #arg << 16 | syscall # */ + andi r2, 0x1ff, r2 /* r2 = syscall # */ + blink tr0, LINK + + pta syscall_ret, tr0 + blink tr0, ZERO + + /* New syscall implementation*/ +system_call: + pta unknown_trap, tr0 + or r5, ZERO, r4 /* TRA (=r5) -> r4 */ + shlri r4, 20, r4 + bnei r4, 1, tr0 /* unknown_trap if not 0x1yzzzz */ + + /* It's a system call */ + st.q r3, FRAME_S(FSYSCALL_ID), r5 /* ID (0x1yzzzz) -> stack */ + andi r5, 0x1ff, r5 /* syscall # -> r5 */ + + STI() + + pta syscall_allowed, tr0 + movi NR_syscalls - 1, r4 /* Last valid */ + bgeu/l r4, r5, tr0 + +syscall_bad: + /* Return ENOSYS ! */ + movi -(ENOSYS), r2 /* Fall-through */ + + .global syscall_ret +syscall_ret: + st.q SP, FRAME_R(9), r2 /* Expecting SP back to BASIC frame */ + +#ifdef CONFIG_POOR_MANS_STRACE + /* nothing useful in registers at this point */ + + movi evt_debug2, r5 + ori r5, 1, r5 + ptabs r5, tr0 + ld.q SP, FRAME_R(9), r2 + or SP, ZERO, r3 + blink tr0, LINK +#endif + + ld.q SP, FRAME_S(FSPC), r2 + addi r2, 4, r2 /* Move PC, being pre-execution event */ + st.q SP, FRAME_S(FSPC), r2 + pta ret_from_syscall, tr0 + blink tr0, ZERO + + +/* A different return path for ret_from_fork, because we now need + * to call schedule_tail with the later kernels. Because prev is + * loaded into r2 by switch_to() means we can just call it straight away + */ + +.global ret_from_fork +ret_from_fork: + + movi schedule_tail,r5 + ori r5, 1, r5 + ptabs r5, tr0 + blink tr0, LINK + +#ifdef CONFIG_POOR_MANS_STRACE + /* nothing useful in registers at this point */ + + movi evt_debug2, r5 + ori r5, 1, r5 + ptabs r5, tr0 + ld.q SP, FRAME_R(9), r2 + or SP, ZERO, r3 + blink tr0, LINK +#endif + + ld.q SP, FRAME_S(FSPC), r2 + addi r2, 4, r2 /* Move PC, being pre-execution event */ + st.q SP, FRAME_S(FSPC), r2 + pta ret_from_syscall, tr0 + blink tr0, ZERO + + + +syscall_allowed: + /* Use LINK to deflect the exit point, default is syscall_ret */ + pta syscall_ret, tr0 + gettr tr0, LINK + pta syscall_notrace, tr0 + + getcon KCR0, r2 + ld.l r2, TI_FLAGS, r4 + movi (1 << TIF_SYSCALL_TRACE), r6 + and r6, r4, r6 + beq/l r6, ZERO, tr0 + + /* Trace it by calling syscall_trace before and after */ + movi syscall_trace, r4 + ptabs r4, tr0 + blink tr0, LINK + /* Reload syscall number as r5 is trashed by syscall_trace */ + ld.q SP, FRAME_S(FSYSCALL_ID), r5 + andi r5, 0x1ff, r5 + + pta syscall_ret_trace, tr0 + gettr tr0, LINK + +syscall_notrace: + /* Now point to the appropriate 4th level syscall handler */ + movi sys_call_table, r4 + shlli r5, 2, r5 + ldx.l r4, r5, r5 + ptabs r5, tr0 + + /* Prepare original args */ + ld.q SP, FRAME_R(2), r2 + ld.q SP, FRAME_R(3), r3 + ld.q SP, FRAME_R(4), r4 + ld.q SP, FRAME_R(5), r5 + ld.q SP, FRAME_R(6), r6 + ld.q SP, FRAME_R(7), r7 + + /* And now the trick for those syscalls requiring regs * ! */ + or SP, ZERO, r8 + + /* Call it */ + blink tr0, ZERO /* LINK is already properly set */ + +syscall_ret_trace: + /* We get back here only if under trace */ + st.q SP, FRAME_R(9), r2 /* Save return value */ + + movi syscall_trace, LINK + ptabs LINK, tr0 + blink tr0, LINK + + /* This needs to be done after any syscall tracing */ + ld.q SP, FRAME_S(FSPC), r2 + addi r2, 4, r2 /* Move PC, being pre-execution event */ + st.q SP, FRAME_S(FSPC), r2 + + pta ret_from_syscall, tr0 + blink tr0, ZERO /* Resume normal return sequence */ + +/* + * --- Switch to running under a particular ASID and return the previous ASID value + * --- The caller is assumed to have done a cli before calling this. + * + * Input r2 : new ASID + * Output r2 : old ASID + */ + + .global switch_and_save_asid +switch_and_save_asid: + getcon sr, r0 + movi 255, r4 + shlli r4, 16, r4 /* r4 = mask to select ASID */ + and r0, r4, r3 /* r3 = shifted old ASID */ + andi r2, 255, r2 /* mask down new ASID */ + shlli r2, 16, r2 /* align new ASID against SR.ASID */ + andc r0, r4, r0 /* efface old ASID from SR */ + or r0, r2, r0 /* insert the new ASID */ + putcon r0, ssr + movi 1f, r0 + putcon r0, spc + rte + nop +1: + ptabs LINK, tr0 + shlri r3, 16, r2 /* r2 = old ASID */ + blink tr0, r63 + + .global route_to_panic_handler +route_to_panic_handler: + /* Switch to real mode, goto panic_handler, don't return. Useful for + last-chance debugging, e.g. if no output wants to go to the console. + */ + + movi panic_handler - CONFIG_CACHED_MEMORY_OFFSET, r1 + ptabs r1, tr0 + pta 1f, tr1 + gettr tr1, r0 + putcon r0, spc + getcon sr, r0 + movi 1, r1 + shlli r1, 31, r1 + andc r0, r1, r0 + putcon r0, ssr + rte + nop +1: /* Now in real mode */ + blink tr0, r63 + nop + + .global peek_real_address_q +peek_real_address_q: + /* Two args: + r2 : real mode address to peek + r2(out) : result quadword + + This is provided as a cheapskate way of manipulating device + registers for debugging (to avoid the need to onchip_remap the debug + module, and to avoid the need to onchip_remap the watchpoint + controller in a way that identity maps sufficient bits to avoid the + SH5-101 cut2 silicon defect). + + This code is not performance critical + */ + + add.l r2, r63, r2 /* sign extend address */ + getcon sr, r0 /* r0 = saved original SR */ + movi 1, r1 + shlli r1, 28, r1 + or r0, r1, r1 /* r0 with block bit set */ + putcon r1, sr /* now in critical section */ + movi 1, r36 + shlli r36, 31, r36 + andc r1, r36, r1 /* turn sr.mmu off in real mode section */ + + putcon r1, ssr + movi .peek0 - CONFIG_CACHED_MEMORY_OFFSET, r36 /* real mode target address */ + movi 1f, r37 /* virtual mode return addr */ + putcon r36, spc + + synco + rte + nop + +.peek0: /* come here in real mode, don't touch caches!! + still in critical section (sr.bl==1) */ + putcon r0, ssr + putcon r37, spc + /* Here's the actual peek. If the address is bad, all bets are now off + * what will happen (handlers invoked in real-mode = bad news) */ + ld.q r2, 0, r2 + synco + rte /* Back to virtual mode */ + nop + +1: + ptabs LINK, tr0 + blink tr0, r63 + + .global poke_real_address_q +poke_real_address_q: + /* Two args: + r2 : real mode address to poke + r3 : quadword value to write. + + This is provided as a cheapskate way of manipulating device + registers for debugging (to avoid the need to onchip_remap the debug + module, and to avoid the need to onchip_remap the watchpoint + controller in a way that identity maps sufficient bits to avoid the + SH5-101 cut2 silicon defect). + + This code is not performance critical + */ + + add.l r2, r63, r2 /* sign extend address */ + getcon sr, r0 /* r0 = saved original SR */ + movi 1, r1 + shlli r1, 28, r1 + or r0, r1, r1 /* r0 with block bit set */ + putcon r1, sr /* now in critical section */ + movi 1, r36 + shlli r36, 31, r36 + andc r1, r36, r1 /* turn sr.mmu off in real mode section */ + + putcon r1, ssr + movi .poke0-CONFIG_CACHED_MEMORY_OFFSET, r36 /* real mode target address */ + movi 1f, r37 /* virtual mode return addr */ + putcon r36, spc + + synco + rte + nop + +.poke0: /* come here in real mode, don't touch caches!! + still in critical section (sr.bl==1) */ + putcon r0, ssr + putcon r37, spc + /* Here's the actual poke. If the address is bad, all bets are now off + * what will happen (handlers invoked in real-mode = bad news) */ + st.q r2, 0, r3 + synco + rte /* Back to virtual mode */ + nop + +1: + ptabs LINK, tr0 + blink tr0, r63 + +/* + * --- User Access Handling Section + */ + +/* + * User Access support. It all moved to non inlined Assembler + * functions in here. + * + * __kernel_size_t __copy_user(void *__to, const void *__from, + * __kernel_size_t __n) + * + * Inputs: + * (r2) target address + * (r3) source address + * (r4) size in bytes + * + * Ouputs: + * (*r2) target data + * (r2) non-copied bytes + * + * If a fault occurs on the user pointer, bail out early and return the + * number of bytes not copied in r2. + * Strategy : for large blocks, call a real memcpy function which can + * move >1 byte at a time using unaligned ld/st instructions, and can + * manipulate the cache using prefetch + alloco to improve the speed + * further. If a fault occurs in that function, just revert to the + * byte-by-byte approach used for small blocks; this is rare so the + * performance hit for that case does not matter. + * + * For small blocks it's not worth the overhead of setting up and calling + * the memcpy routine; do the copy a byte at a time. + * + */ + .global __copy_user +__copy_user: + pta __copy_user_byte_by_byte, tr1 + movi 16, r0 ! this value is a best guess, should tune it by benchmarking + bge/u r0, r4, tr1 + pta copy_user_memcpy, tr0 + addi SP, -32, SP + /* Save arguments in case we have to fix-up unhandled page fault */ + st.q SP, 0, r2 + st.q SP, 8, r3 + st.q SP, 16, r4 + st.q SP, 24, r35 ! r35 is callee-save + /* Save LINK in a register to reduce RTS time later (otherwise + ld SP,*,LINK;ptabs LINK;trn;blink trn,r63 becomes a critical path) */ + ori LINK, 0, r35 + blink tr0, LINK + + /* Copy completed normally if we get back here */ + ptabs r35, tr0 + ld.q SP, 24, r35 + /* don't restore r2-r4, pointless */ + /* set result=r2 to zero as the copy must have succeeded. */ + or r63, r63, r2 + addi SP, 32, SP + blink tr0, r63 ! RTS + + .global __copy_user_fixup +__copy_user_fixup: + /* Restore stack frame */ + ori r35, 0, LINK + ld.q SP, 24, r35 + ld.q SP, 16, r4 + ld.q SP, 8, r3 + ld.q SP, 0, r2 + addi SP, 32, SP + /* Fall through to original code, in the 'same' state we entered with */ + +/* The slow byte-by-byte method is used if the fast copy traps due to a bad + user address. In that rare case, the speed drop can be tolerated. */ +__copy_user_byte_by_byte: + pta ___copy_user_exit, tr1 + pta ___copy_user1, tr0 + beq/u r4, r63, tr1 /* early exit for zero length copy */ + sub r2, r3, r0 + addi r0, -1, r0 + +___copy_user1: + ld.b r3, 0, r5 /* Fault address 1 */ + + /* Could rewrite this to use just 1 add, but the second comes 'free' + due to load latency */ + addi r3, 1, r3 + addi r4, -1, r4 /* No real fixup required */ +___copy_user2: + stx.b r3, r0, r5 /* Fault address 2 */ + bne r4, ZERO, tr0 + +___copy_user_exit: + or r4, ZERO, r2 + ptabs LINK, tr0 + blink tr0, ZERO + +/* + * __kernel_size_t __clear_user(void *addr, __kernel_size_t size) + * + * Inputs: + * (r2) target address + * (r3) size in bytes + * + * Ouputs: + * (*r2) zero-ed target data + * (r2) non-zero-ed bytes + */ + .global __clear_user +__clear_user: + pta ___clear_user_exit, tr1 + pta ___clear_user1, tr0 + beq/u r3, r63, tr1 + +___clear_user1: + st.b r2, 0, ZERO /* Fault address */ + addi r2, 1, r2 + addi r3, -1, r3 /* No real fixup required */ + bne r3, ZERO, tr0 + +___clear_user_exit: + or r3, ZERO, r2 + ptabs LINK, tr0 + blink tr0, ZERO + + +/* + * int __strncpy_from_user(unsigned long __dest, unsigned long __src, + * int __count) + * + * Inputs: + * (r2) target address + * (r3) source address + * (r4) maximum size in bytes + * + * Ouputs: + * (*r2) copied data + * (r2) -EFAULT (in case of faulting) + * copied data (otherwise) + */ + .global __strncpy_from_user +__strncpy_from_user: + pta ___strncpy_from_user1, tr0 + pta ___strncpy_from_user_done, tr1 + or r4, ZERO, r5 /* r5 = original count */ + beq/u r4, r63, tr1 /* early exit if r4==0 */ + movi -(EFAULT), r6 /* r6 = reply, no real fixup */ + or ZERO, ZERO, r7 /* r7 = data, clear top byte of data */ + +___strncpy_from_user1: + ld.b r3, 0, r7 /* Fault address: only in reading */ + st.b r2, 0, r7 + addi r2, 1, r2 + addi r3, 1, r3 + beq/u ZERO, r7, tr1 + addi r4, -1, r4 /* return real number of copied bytes */ + bne/l ZERO, r4, tr0 + +___strncpy_from_user_done: + sub r5, r4, r6 /* If done, return copied */ + +___strncpy_from_user_exit: + or r6, ZERO, r2 + ptabs LINK, tr0 + blink tr0, ZERO + +/* + * extern long __strnlen_user(const char *__s, long __n) + * + * Inputs: + * (r2) source address + * (r3) source size in bytes + * + * Ouputs: + * (r2) -EFAULT (in case of faulting) + * string length (otherwise) + */ + .global __strnlen_user +__strnlen_user: + pta ___strnlen_user_set_reply, tr0 + pta ___strnlen_user1, tr1 + or ZERO, ZERO, r5 /* r5 = counter */ + movi -(EFAULT), r6 /* r6 = reply, no real fixup */ + or ZERO, ZERO, r7 /* r7 = data, clear top byte of data */ + beq r3, ZERO, tr0 + +___strnlen_user1: + ldx.b r2, r5, r7 /* Fault address: only in reading */ + addi r3, -1, r3 /* No real fixup */ + addi r5, 1, r5 + beq r3, ZERO, tr0 + bne r7, ZERO, tr1 +! The line below used to be active. This meant led to a junk byte lying between each pair +! of entries in the argv & envp structures in memory. Whilst the program saw the right data +! via the argv and envp arguments to main, it meant the 'flat' representation visible through +! /proc/$pid/cmdline was corrupt, causing trouble with ps, for example. +! addi r5, 1, r5 /* Include '\0' */ + +___strnlen_user_set_reply: + or r5, ZERO, r6 /* If done, return counter */ + +___strnlen_user_exit: + or r6, ZERO, r2 + ptabs LINK, tr0 + blink tr0, ZERO + +/* + * extern long __get_user_asm_?(void *val, long addr) + * + * Inputs: + * (r2) dest address + * (r3) source address (in User Space) + * + * Ouputs: + * (r2) -EFAULT (faulting) + * 0 (not faulting) + */ + .global __get_user_asm_b +__get_user_asm_b: + or r2, ZERO, r4 + movi -(EFAULT), r2 /* r2 = reply, no real fixup */ + +___get_user_asm_b1: + ld.b r3, 0, r5 /* r5 = data */ + st.b r4, 0, r5 + or ZERO, ZERO, r2 + +___get_user_asm_b_exit: + ptabs LINK, tr0 + blink tr0, ZERO + + + .global __get_user_asm_w +__get_user_asm_w: + or r2, ZERO, r4 + movi -(EFAULT), r2 /* r2 = reply, no real fixup */ + +___get_user_asm_w1: + ld.w r3, 0, r5 /* r5 = data */ + st.w r4, 0, r5 + or ZERO, ZERO, r2 + +___get_user_asm_w_exit: + ptabs LINK, tr0 + blink tr0, ZERO + + + .global __get_user_asm_l +__get_user_asm_l: + or r2, ZERO, r4 + movi -(EFAULT), r2 /* r2 = reply, no real fixup */ + +___get_user_asm_l1: + ld.l r3, 0, r5 /* r5 = data */ + st.l r4, 0, r5 + or ZERO, ZERO, r2 + +___get_user_asm_l_exit: + ptabs LINK, tr0 + blink tr0, ZERO + + + .global __get_user_asm_q +__get_user_asm_q: + or r2, ZERO, r4 + movi -(EFAULT), r2 /* r2 = reply, no real fixup */ + +___get_user_asm_q1: + ld.q r3, 0, r5 /* r5 = data */ + st.q r4, 0, r5 + or ZERO, ZERO, r2 + +___get_user_asm_q_exit: + ptabs LINK, tr0 + blink tr0, ZERO + +/* + * extern long __put_user_asm_?(void *pval, long addr) + * + * Inputs: + * (r2) kernel pointer to value + * (r3) dest address (in User Space) + * + * Ouputs: + * (r2) -EFAULT (faulting) + * 0 (not faulting) + */ + .global __put_user_asm_b +__put_user_asm_b: + ld.b r2, 0, r4 /* r4 = data */ + movi -(EFAULT), r2 /* r2 = reply, no real fixup */ + +___put_user_asm_b1: + st.b r3, 0, r4 + or ZERO, ZERO, r2 + +___put_user_asm_b_exit: + ptabs LINK, tr0 + blink tr0, ZERO + + + .global __put_user_asm_w +__put_user_asm_w: + ld.w r2, 0, r4 /* r4 = data */ + movi -(EFAULT), r2 /* r2 = reply, no real fixup */ + +___put_user_asm_w1: + st.w r3, 0, r4 + or ZERO, ZERO, r2 + +___put_user_asm_w_exit: + ptabs LINK, tr0 + blink tr0, ZERO + + + .global __put_user_asm_l +__put_user_asm_l: + ld.l r2, 0, r4 /* r4 = data */ + movi -(EFAULT), r2 /* r2 = reply, no real fixup */ + +___put_user_asm_l1: + st.l r3, 0, r4 + or ZERO, ZERO, r2 + +___put_user_asm_l_exit: + ptabs LINK, tr0 + blink tr0, ZERO + + + .global __put_user_asm_q +__put_user_asm_q: + ld.q r2, 0, r4 /* r4 = data */ + movi -(EFAULT), r2 /* r2 = reply, no real fixup */ + +___put_user_asm_q1: + st.q r3, 0, r4 + or ZERO, ZERO, r2 + +___put_user_asm_q_exit: + ptabs LINK, tr0 + blink tr0, ZERO + +panic_stash_regs: + /* The idea is : when we get an unhandled panic, we dump the registers + to a known memory location, the just sit in a tight loop. + This allows the human to look at the memory region through the GDB + session (assuming the debug module's SHwy initiator isn't locked up + or anything), to hopefully analyze the cause of the panic. */ + + /* On entry, former r15 (SP) is in DCR + former r0 is at resvec_saved_area + 0 + former r1 is at resvec_saved_area + 8 + former tr0 is at resvec_saved_area + 32 + DCR is the only register whose value is lost altogether. + */ + + movi 0xffffffff80000000, r0 ! phy of dump area + ld.q SP, 0x000, r1 ! former r0 + st.q r0, 0x000, r1 + ld.q SP, 0x008, r1 ! former r1 + st.q r0, 0x008, r1 + st.q r0, 0x010, r2 + st.q r0, 0x018, r3 + st.q r0, 0x020, r4 + st.q r0, 0x028, r5 + st.q r0, 0x030, r6 + st.q r0, 0x038, r7 + st.q r0, 0x040, r8 + st.q r0, 0x048, r9 + st.q r0, 0x050, r10 + st.q r0, 0x058, r11 + st.q r0, 0x060, r12 + st.q r0, 0x068, r13 + st.q r0, 0x070, r14 + getcon dcr, r14 + st.q r0, 0x078, r14 + st.q r0, 0x080, r16 + st.q r0, 0x088, r17 + st.q r0, 0x090, r18 + st.q r0, 0x098, r19 + st.q r0, 0x0a0, r20 + st.q r0, 0x0a8, r21 + st.q r0, 0x0b0, r22 + st.q r0, 0x0b8, r23 + st.q r0, 0x0c0, r24 + st.q r0, 0x0c8, r25 + st.q r0, 0x0d0, r26 + st.q r0, 0x0d8, r27 + st.q r0, 0x0e0, r28 + st.q r0, 0x0e8, r29 + st.q r0, 0x0f0, r30 + st.q r0, 0x0f8, r31 + st.q r0, 0x100, r32 + st.q r0, 0x108, r33 + st.q r0, 0x110, r34 + st.q r0, 0x118, r35 + st.q r0, 0x120, r36 + st.q r0, 0x128, r37 + st.q r0, 0x130, r38 + st.q r0, 0x138, r39 + st.q r0, 0x140, r40 + st.q r0, 0x148, r41 + st.q r0, 0x150, r42 + st.q r0, 0x158, r43 + st.q r0, 0x160, r44 + st.q r0, 0x168, r45 + st.q r0, 0x170, r46 + st.q r0, 0x178, r47 + st.q r0, 0x180, r48 + st.q r0, 0x188, r49 + st.q r0, 0x190, r50 + st.q r0, 0x198, r51 + st.q r0, 0x1a0, r52 + st.q r0, 0x1a8, r53 + st.q r0, 0x1b0, r54 + st.q r0, 0x1b8, r55 + st.q r0, 0x1c0, r56 + st.q r0, 0x1c8, r57 + st.q r0, 0x1d0, r58 + st.q r0, 0x1d8, r59 + st.q r0, 0x1e0, r60 + st.q r0, 0x1e8, r61 + st.q r0, 0x1f0, r62 + st.q r0, 0x1f8, r63 ! bogus, but for consistency's sake... + + ld.q SP, 0x020, r1 ! former tr0 + st.q r0, 0x200, r1 + gettr tr1, r1 + st.q r0, 0x208, r1 + gettr tr2, r1 + st.q r0, 0x210, r1 + gettr tr3, r1 + st.q r0, 0x218, r1 + gettr tr4, r1 + st.q r0, 0x220, r1 + gettr tr5, r1 + st.q r0, 0x228, r1 + gettr tr6, r1 + st.q r0, 0x230, r1 + gettr tr7, r1 + st.q r0, 0x238, r1 + + getcon sr, r1 + getcon ssr, r2 + getcon pssr, r3 + getcon spc, r4 + getcon pspc, r5 + getcon intevt, r6 + getcon expevt, r7 + getcon pexpevt, r8 + getcon tra, r9 + getcon tea, r10 + getcon kcr0, r11 + getcon kcr1, r12 + getcon vbr, r13 + getcon resvec, r14 + + st.q r0, 0x240, r1 + st.q r0, 0x248, r2 + st.q r0, 0x250, r3 + st.q r0, 0x258, r4 + st.q r0, 0x260, r5 + st.q r0, 0x268, r6 + st.q r0, 0x270, r7 + st.q r0, 0x278, r8 + st.q r0, 0x280, r9 + st.q r0, 0x288, r10 + st.q r0, 0x290, r11 + st.q r0, 0x298, r12 + st.q r0, 0x2a0, r13 + st.q r0, 0x2a8, r14 + + getcon SPC,r2 + getcon SSR,r3 + getcon EXPEVT,r4 + /* Prepare to jump to C - physical address */ + movi panic_handler-CONFIG_CACHED_MEMORY_OFFSET, r1 + ori r1, 1, r1 + ptabs r1, tr0 + getcon DCR, SP + blink tr0, ZERO + nop + nop + nop + nop + + + + +/* + * --- Signal Handling Section + */ + +/* + * extern long long _sa_default_rt_restorer + * extern long long _sa_default_restorer + * + * or, better, + * + * extern void _sa_default_rt_restorer(void) + * extern void _sa_default_restorer(void) + * + * Code prototypes to do a sys_rt_sigreturn() or sys_sysreturn() + * from user space. Copied into user space by signal management. + * Both must be quad aligned and 2 quad long (4 instructions). + * + */ + .balign 8 + .global sa_default_rt_restorer +sa_default_rt_restorer: + movi 0x10, r9 + shori __NR_rt_sigreturn, r9 + trapa r9 + nop + + .balign 8 + .global sa_default_restorer +sa_default_restorer: + movi 0x10, r9 + shori __NR_sigreturn, r9 + trapa r9 + nop + +/* + * --- __ex_table Section + */ + +/* + * User Access Exception Table. + */ + .section __ex_table, "a" + + .global asm_uaccess_start /* Just a marker */ +asm_uaccess_start: + + .long ___copy_user1, ___copy_user_exit + .long ___copy_user2, ___copy_user_exit + .long ___clear_user1, ___clear_user_exit + .long ___strncpy_from_user1, ___strncpy_from_user_exit + .long ___strnlen_user1, ___strnlen_user_exit + .long ___get_user_asm_b1, ___get_user_asm_b_exit + .long ___get_user_asm_w1, ___get_user_asm_w_exit + .long ___get_user_asm_l1, ___get_user_asm_l_exit + .long ___get_user_asm_q1, ___get_user_asm_q_exit + .long ___put_user_asm_b1, ___put_user_asm_b_exit + .long ___put_user_asm_w1, ___put_user_asm_w_exit + .long ___put_user_asm_l1, ___put_user_asm_l_exit + .long ___put_user_asm_q1, ___put_user_asm_q_exit + + .global asm_uaccess_end /* Just a marker */ +asm_uaccess_end: + + + + +/* + * --- .text.init Section + */ + + .section .text.init, "ax" + +/* + * void trap_init (void) + * + */ + .global trap_init +trap_init: + addi SP, -24, SP /* Room to save r28/r29/r30 */ + st.q SP, 0, r28 + st.q SP, 8, r29 + st.q SP, 16, r30 + + /* Set VBR and RESVEC */ + movi LVBR_block, r19 + andi r19, -4, r19 /* reset MMUOFF + reserved */ + /* For RESVEC exceptions we force the MMU off, which means we need the + physical address. */ + movi LRESVEC_block-CONFIG_CACHED_MEMORY_OFFSET, r20 + andi r20, -4, r20 /* reset reserved */ + ori r20, 1, r20 /* set MMUOFF */ + putcon r19, VBR + putcon r20, RESVEC + + /* Sanity check */ + movi LVBR_block_end, r21 + andi r21, -4, r21 + movi BLOCK_SIZE, r29 /* r29 = expected size */ + or r19, ZERO, r30 + add r19, r29, r19 + + /* + * Ugly, but better loop forever now than crash afterwards. + * We should print a message, but if we touch LVBR or + * LRESVEC blocks we should not be surprised if we get stuck + * in trap_init(). + */ + pta trap_init_loop, tr1 + gettr tr1, r28 /* r28 = trap_init_loop */ + sub r21, r30, r30 /* r30 = actual size */ + + /* + * VBR/RESVEC handlers overlap by being bigger than + * allowed. Very bad. Just loop forever. + * (r28) panic/loop address + * (r29) expected size + * (r30) actual size + */ +trap_init_loop: + bne r19, r21, tr1 + + /* Now that exception vectors are set up reset SR.BL */ + getcon SR, r22 + movi SR_UNBLOCK_EXC, r23 + and r22, r23, r22 + putcon r22, SR + + addi SP, 24, SP + ptabs LINK, tr0 + blink tr0, ZERO + diff --git a/arch/sh64/kernel/fpu.c b/arch/sh64/kernel/fpu.c new file mode 100644 index 0000000..8ad4ed6 --- /dev/null +++ b/arch/sh64/kernel/fpu.c @@ -0,0 +1,170 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/fpu.c + * + * Copyright (C) 2001 Manuela Cirronis, Paolo Alberelli + * Copyright (C) 2002 STMicroelectronics Limited + * Author : Stuart Menefy + * + * Started from SH4 version: + * Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka + * + */ + +#include <linux/sched.h> +#include <linux/signal.h> +#include <asm/processor.h> +#include <asm/user.h> +#include <asm/io.h> + +/* + * Initially load the FPU with signalling NANS. This bit pattern + * has the property that no matter whether considered as single or as + * double precision, it still represents a signalling NAN. + */ +#define sNAN64 0xFFFFFFFFFFFFFFFFULL +#define sNAN32 0xFFFFFFFFUL + +static union sh_fpu_union init_fpuregs = { + .hard = { + .fp_regs = { [0 ... 63] = sNAN32 }, + .fpscr = FPSCR_INIT + } +}; + +inline void fpsave(struct sh_fpu_hard_struct *fpregs) +{ + asm volatile("fst.p %0, (0*8), fp0\n\t" + "fst.p %0, (1*8), fp2\n\t" + "fst.p %0, (2*8), fp4\n\t" + "fst.p %0, (3*8), fp6\n\t" + "fst.p %0, (4*8), fp8\n\t" + "fst.p %0, (5*8), fp10\n\t" + "fst.p %0, (6*8), fp12\n\t" + "fst.p %0, (7*8), fp14\n\t" + "fst.p %0, (8*8), fp16\n\t" + "fst.p %0, (9*8), fp18\n\t" + "fst.p %0, (10*8), fp20\n\t" + "fst.p %0, (11*8), fp22\n\t" + "fst.p %0, (12*8), fp24\n\t" + "fst.p %0, (13*8), fp26\n\t" + "fst.p %0, (14*8), fp28\n\t" + "fst.p %0, (15*8), fp30\n\t" + "fst.p %0, (16*8), fp32\n\t" + "fst.p %0, (17*8), fp34\n\t" + "fst.p %0, (18*8), fp36\n\t" + "fst.p %0, (19*8), fp38\n\t" + "fst.p %0, (20*8), fp40\n\t" + "fst.p %0, (21*8), fp42\n\t" + "fst.p %0, (22*8), fp44\n\t" + "fst.p %0, (23*8), fp46\n\t" + "fst.p %0, (24*8), fp48\n\t" + "fst.p %0, (25*8), fp50\n\t" + "fst.p %0, (26*8), fp52\n\t" + "fst.p %0, (27*8), fp54\n\t" + "fst.p %0, (28*8), fp56\n\t" + "fst.p %0, (29*8), fp58\n\t" + "fst.p %0, (30*8), fp60\n\t" + "fst.p %0, (31*8), fp62\n\t" + + "fgetscr fr63\n\t" + "fst.s %0, (32*8), fr63\n\t" + : /* no output */ + : "r" (fpregs) + : "memory"); +} + + +static inline void +fpload(struct sh_fpu_hard_struct *fpregs) +{ + asm volatile("fld.p %0, (0*8), fp0\n\t" + "fld.p %0, (1*8), fp2\n\t" + "fld.p %0, (2*8), fp4\n\t" + "fld.p %0, (3*8), fp6\n\t" + "fld.p %0, (4*8), fp8\n\t" + "fld.p %0, (5*8), fp10\n\t" + "fld.p %0, (6*8), fp12\n\t" + "fld.p %0, (7*8), fp14\n\t" + "fld.p %0, (8*8), fp16\n\t" + "fld.p %0, (9*8), fp18\n\t" + "fld.p %0, (10*8), fp20\n\t" + "fld.p %0, (11*8), fp22\n\t" + "fld.p %0, (12*8), fp24\n\t" + "fld.p %0, (13*8), fp26\n\t" + "fld.p %0, (14*8), fp28\n\t" + "fld.p %0, (15*8), fp30\n\t" + "fld.p %0, (16*8), fp32\n\t" + "fld.p %0, (17*8), fp34\n\t" + "fld.p %0, (18*8), fp36\n\t" + "fld.p %0, (19*8), fp38\n\t" + "fld.p %0, (20*8), fp40\n\t" + "fld.p %0, (21*8), fp42\n\t" + "fld.p %0, (22*8), fp44\n\t" + "fld.p %0, (23*8), fp46\n\t" + "fld.p %0, (24*8), fp48\n\t" + "fld.p %0, (25*8), fp50\n\t" + "fld.p %0, (26*8), fp52\n\t" + "fld.p %0, (27*8), fp54\n\t" + "fld.p %0, (28*8), fp56\n\t" + "fld.p %0, (29*8), fp58\n\t" + "fld.p %0, (30*8), fp60\n\t" + + "fld.s %0, (32*8), fr63\n\t" + "fputscr fr63\n\t" + + "fld.p %0, (31*8), fp62\n\t" + : /* no output */ + : "r" (fpregs) ); +} + +void fpinit(struct sh_fpu_hard_struct *fpregs) +{ + *fpregs = init_fpuregs.hard; +} + +asmlinkage void +do_fpu_error(unsigned long ex, struct pt_regs *regs) +{ + struct task_struct *tsk = current; + + regs->pc += 4; + + tsk->thread.trap_no = 11; + tsk->thread.error_code = 0; + force_sig(SIGFPE, tsk); +} + + +asmlinkage void +do_fpu_state_restore(unsigned long ex, struct pt_regs *regs) +{ + void die(const char *str, struct pt_regs *regs, long err); + + if (! user_mode(regs)) + die("FPU used in kernel", regs, ex); + + regs->sr &= ~SR_FD; + + if (last_task_used_math == current) + return; + + grab_fpu(); + if (last_task_used_math != NULL) { + /* Other processes fpu state, save away */ + fpsave(&last_task_used_math->thread.fpu.hard); + } + last_task_used_math = current; + if (used_math()) { + fpload(¤t->thread.fpu.hard); + } else { + /* First time FPU user. */ + fpload(&init_fpuregs.hard); + set_used_math(); + } + release_fpu(); +} + diff --git a/arch/sh64/kernel/head.S b/arch/sh64/kernel/head.S new file mode 100644 index 0000000..cc0b628 --- /dev/null +++ b/arch/sh64/kernel/head.S @@ -0,0 +1,373 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/head.S + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003, 2004 Paul Mundt + * + * + * benedict.gaster@superh.com: 2nd May 2002 + * Moved definition of empty_zero_page to its own section allowing + * it to be placed at an absolute address known at load time. + * + * lethal@linux-sh.org: 9th May 2003 + * Kill off GLOBAL_NAME() usage. + * + * lethal@linux-sh.org: 8th May 2004 + * Add early SCIF console DTLB mapping. + */ + +#include <linux/config.h> + +#include <asm/page.h> +#include <asm/mmu_context.h> +#include <asm/cache.h> +#include <asm/tlb.h> +#include <asm/processor.h> +#include <asm/registers.h> +#include <asm/thread_info.h> + +/* + * MMU defines: TLB boundaries. + */ + +#define MMUIR_FIRST ITLB_FIXED +#define MMUIR_END ITLB_LAST_VAR_UNRESTRICTED+TLB_STEP +#define MMUIR_STEP TLB_STEP + +#define MMUDR_FIRST DTLB_FIXED +#define MMUDR_END DTLB_LAST_VAR_UNRESTRICTED+TLB_STEP +#define MMUDR_STEP TLB_STEP + +/* Safety check : CONFIG_CACHED_MEMORY_OFFSET has to be a multiple of 512Mb */ +#if (CONFIG_CACHED_MEMORY_OFFSET & ((1UL<<29)-1)) +#error "CONFIG_CACHED_MEMORY_OFFSET must be a multiple of 512Mb" +#endif + +/* + * MMU defines: Fixed TLBs. + */ +/* Deal safely with the case where the base of RAM is not 512Mb aligned */ + +#define ALIGN_512M_MASK (0xffffffffe0000000) +#define ALIGNED_EFFECTIVE ((CONFIG_CACHED_MEMORY_OFFSET + CONFIG_MEMORY_START) & ALIGN_512M_MASK) +#define ALIGNED_PHYSICAL (CONFIG_MEMORY_START & ALIGN_512M_MASK) + +#define MMUIR_TEXT_H (0x0000000000000003 | ALIGNED_EFFECTIVE) + /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */ + +#define MMUIR_TEXT_L (0x000000000000009a | ALIGNED_PHYSICAL) + /* 512 Mb, Cacheable, Write-back, execute, Not User, Ph. Add. */ + +#define MMUDR_CACHED_H 0x0000000000000003 | ALIGNED_EFFECTIVE + /* Enabled, Shared, ASID 0, Eff. Add. 0xA0000000 */ +#define MMUDR_CACHED_L 0x000000000000015a | ALIGNED_PHYSICAL + /* 512 Mb, Cacheable, Write-back, read/write, Not User, Ph. Add. */ + +#ifdef CONFIG_ICACHE_DISABLED +#define ICCR0_INIT_VAL ICCR0_OFF /* ICACHE off */ +#else +#define ICCR0_INIT_VAL ICCR0_ON | ICCR0_ICI /* ICE + ICI */ +#endif +#define ICCR1_INIT_VAL ICCR1_NOLOCK /* No locking */ + +#if defined (CONFIG_DCACHE_DISABLED) +#define OCCR0_INIT_VAL OCCR0_OFF /* D-cache: off */ +#elif defined (CONFIG_DCACHE_WRITE_THROUGH) +#define OCCR0_INIT_VAL OCCR0_ON | OCCR0_OCI | OCCR0_WT /* D-cache: on, */ + /* WT, invalidate */ +#elif defined (CONFIG_DCACHE_WRITE_BACK) +#define OCCR0_INIT_VAL OCCR0_ON | OCCR0_OCI | OCCR0_WB /* D-cache: on, */ + /* WB, invalidate */ +#else +#error preprocessor flag CONFIG_DCACHE_... not recognized! +#endif + +#define OCCR1_INIT_VAL OCCR1_NOLOCK /* No locking */ + + .section .empty_zero_page, "aw" + .global empty_zero_page + +empty_zero_page: + .long 1 /* MOUNT_ROOT_RDONLY */ + .long 0 /* RAMDISK_FLAGS */ + .long 0x0200 /* ORIG_ROOT_DEV */ + .long 1 /* LOADER_TYPE */ + .long 0x00800000 /* INITRD_START */ + .long 0x00800000 /* INITRD_SIZE */ + .long 0 + + .text + .balign 4096,0,4096 + + .section .data, "aw" + .balign PAGE_SIZE + + .section .data, "aw" + .balign PAGE_SIZE + + .global swapper_pg_dir +swapper_pg_dir: + .space PAGE_SIZE, 0 + + .global empty_bad_page +empty_bad_page: + .space PAGE_SIZE, 0 + + .global empty_bad_pte_table +empty_bad_pte_table: + .space PAGE_SIZE, 0 + + .global fpu_in_use +fpu_in_use: .quad 0 + + + .section .text, "ax" + .balign L1_CACHE_BYTES +/* + * Condition at the entry of __stext: + * . Reset state: + * . SR.FD = 1 (FPU disabled) + * . SR.BL = 1 (Exceptions disabled) + * . SR.MD = 1 (Privileged Mode) + * . SR.MMU = 0 (MMU Disabled) + * . SR.CD = 0 (CTC User Visible) + * . SR.IMASK = Undefined (Interrupt Mask) + * + * Operations supposed to be performed by __stext: + * . prevent speculative fetch onto device memory while MMU is off + * . reflect as much as possible SH5 ABI (r15, r26, r27, r18) + * . first, save CPU state and set it to something harmless + * . any CPU detection and/or endianness settings (?) + * . initialize EMI/LMI (but not TMU/RTC/INTC/SCIF): TBD + * . set initial TLB entries for cached and uncached regions + * (no fine granularity paging) + * . set initial cache state + * . enable MMU and caches + * . set CPU to a consistent state + * . registers (including stack pointer and current/KCR0) + * . NOT expecting to set Exception handling nor VBR/RESVEC/DCR + * at this stage. This is all to later Linux initialization steps. + * . initialize FPU + * . clear BSS + * . jump into start_kernel() + * . be prepared to hopeless start_kernel() returns. + * + */ + .global _stext +_stext: + /* + * Prevent speculative fetch on device memory due to + * uninitialized target registers. + */ + ptabs/u ZERO, tr0 + ptabs/u ZERO, tr1 + ptabs/u ZERO, tr2 + ptabs/u ZERO, tr3 + ptabs/u ZERO, tr4 + ptabs/u ZERO, tr5 + ptabs/u ZERO, tr6 + ptabs/u ZERO, tr7 + synci + + /* + * Read/Set CPU state. After this block: + * r29 = Initial SR + */ + getcon SR, r29 + movi SR_HARMLESS, r20 + putcon r20, SR + + /* + * Initialize EMI/LMI. To Be Done. + */ + + /* + * CPU detection and/or endianness settings (?). To Be Done. + * Pure PIC code here, please ! Just save state into r30. + * After this block: + * r30 = CPU type/Platform Endianness + */ + + /* + * Set initial TLB entries for cached and uncached regions. + * Note: PTA/BLINK is PIC code, PTABS/BLINK isn't ! + */ + /* Clear ITLBs */ + pta clear_ITLB, tr1 + movi MMUIR_FIRST, r21 + movi MMUIR_END, r22 +clear_ITLB: + putcfg r21, 0, ZERO /* Clear MMUIR[n].PTEH.V */ + addi r21, MMUIR_STEP, r21 + bne r21, r22, tr1 + + /* Clear DTLBs */ + pta clear_DTLB, tr1 + movi MMUDR_FIRST, r21 + movi MMUDR_END, r22 +clear_DTLB: + putcfg r21, 0, ZERO /* Clear MMUDR[n].PTEH.V */ + addi r21, MMUDR_STEP, r21 + bne r21, r22, tr1 + + /* Map one big (512Mb) page for ITLB */ + movi MMUIR_FIRST, r21 + movi MMUIR_TEXT_L, r22 /* PTEL first */ + add.l r22, r63, r22 /* Sign extend */ + putcfg r21, 1, r22 /* Set MMUIR[0].PTEL */ + movi MMUIR_TEXT_H, r22 /* PTEH last */ + add.l r22, r63, r22 /* Sign extend */ + putcfg r21, 0, r22 /* Set MMUIR[0].PTEH */ + + /* Map one big CACHED (512Mb) page for DTLB */ + movi MMUDR_FIRST, r21 + movi MMUDR_CACHED_L, r22 /* PTEL first */ + add.l r22, r63, r22 /* Sign extend */ + putcfg r21, 1, r22 /* Set MMUDR[0].PTEL */ + movi MMUDR_CACHED_H, r22 /* PTEH last */ + add.l r22, r63, r22 /* Sign extend */ + putcfg r21, 0, r22 /* Set MMUDR[0].PTEH */ + +#ifdef CONFIG_EARLY_PRINTK + /* + * Setup a DTLB translation for SCIF phys. + */ + addi r21, MMUDR_STEP, r21 + movi 0x0a03, r22 /* SCIF phys */ + shori 0x0148, r22 + putcfg r21, 1, r22 /* PTEL first */ + movi 0xfa03, r22 /* 0xfa030000, fixed SCIF virt */ + shori 0x0003, r22 + putcfg r21, 0, r22 /* PTEH last */ +#endif + + /* + * Set cache behaviours. + */ + /* ICache */ + movi ICCR_BASE, r21 + movi ICCR0_INIT_VAL, r22 + movi ICCR1_INIT_VAL, r23 + putcfg r21, ICCR_REG0, r22 + putcfg r21, ICCR_REG1, r23 + + /* OCache */ + movi OCCR_BASE, r21 + movi OCCR0_INIT_VAL, r22 + movi OCCR1_INIT_VAL, r23 + putcfg r21, OCCR_REG0, r22 + putcfg r21, OCCR_REG1, r23 + + + /* + * Enable Caches and MMU. Do the first non-PIC jump. + * Now head.S global variables, constants and externs + * can be used. + */ + getcon SR, r21 + movi SR_ENABLE_MMU, r22 + or r21, r22, r21 + putcon r21, SSR + movi hyperspace, r22 + ori r22, 1, r22 /* Make it SHmedia, not required but..*/ + putcon r22, SPC + synco + rte /* And now go into the hyperspace ... */ +hyperspace: /* ... that's the next instruction ! */ + + /* + * Set CPU to a consistent state. + * r31 = FPU support flag + * tr0/tr7 in use. Others give a chance to loop somewhere safe + */ + movi start_kernel, r32 + ori r32, 1, r32 + + ptabs r32, tr0 /* r32 = _start_kernel address */ + pta/u hopeless, tr1 + pta/u hopeless, tr2 + pta/u hopeless, tr3 + pta/u hopeless, tr4 + pta/u hopeless, tr5 + pta/u hopeless, tr6 + pta/u hopeless, tr7 + gettr tr1, r28 /* r28 = hopeless address */ + + /* Set initial stack pointer */ + movi init_thread_union, SP + putcon SP, KCR0 /* Set current to init_task */ + movi THREAD_SIZE, r22 /* Point to the end */ + add SP, r22, SP + + /* + * Initialize FPU. + * Keep FPU flag in r31. After this block: + * r31 = FPU flag + */ + movi fpu_in_use, r31 /* Temporary */ + +#ifdef CONFIG_SH_FPU + getcon SR, r21 + movi SR_ENABLE_FPU, r22 + and r21, r22, r22 + putcon r22, SR /* Try to enable */ + getcon SR, r22 + xor r21, r22, r21 + shlri r21, 15, r21 /* Supposedly 0/1 */ + st.q r31, 0 , r21 /* Set fpu_in_use */ +#else + movi 0, r21 + st.q r31, 0 , r21 /* Set fpu_in_use */ +#endif + or r21, ZERO, r31 /* Set FPU flag at last */ + +#ifndef CONFIG_SH_NO_BSS_INIT +/* Don't clear BSS if running on slow platforms such as an RTL simulation, + remote memory via SHdebug link, etc. For these the memory can be guaranteed + to be all zero on boot anyway. */ + /* + * Clear bss + */ + pta clear_quad, tr1 + movi __bss_start, r22 + movi _end, r23 +clear_quad: + st.q r22, 0, ZERO + addi r22, 8, r22 + bne r22, r23, tr1 /* Both quad aligned, see vmlinux.lds.S */ +#endif + pta/u hopeless, tr1 + + /* Say bye to head.S but be prepared to wrongly get back ... */ + blink tr0, LINK + + /* If we ever get back here through LINK/tr1-tr7 */ + pta/u hopeless, tr7 + +hopeless: + /* + * Something's badly wrong here. Loop endlessly, + * there's nothing more we can do about it. + * + * Note on hopeless: it can be jumped into invariably + * before or after jumping into hyperspace. The only + * requirement is to be PIC called (PTA) before and + * any way (PTA/PTABS) after. According to Virtual + * to Physical mapping a simulator/emulator can easily + * tell where we came here from just looking at hopeless + * (PC) address. + * + * For debugging purposes: + * (r28) hopeless/loop address + * (r29) Original SR + * (r30) CPU type/Platform endianness + * (r31) FPU Support + * (r32) _start_kernel address + */ + blink tr7, ZERO + + diff --git a/arch/sh64/kernel/init_task.c b/arch/sh64/kernel/init_task.c new file mode 100644 index 0000000..de2d07d --- /dev/null +++ b/arch/sh64/kernel/init_task.c @@ -0,0 +1,46 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/init_task.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003 Paul Mundt + * + */ +#include <linux/rwsem.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/init_task.h> +#include <linux/mqueue.h> + +#include <asm/uaccess.h> +#include <asm/pgtable.h> + +static struct fs_struct init_fs = INIT_FS; +static struct files_struct init_files = INIT_FILES; +static struct signal_struct init_signals = INIT_SIGNALS(init_signals); +static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); +struct mm_struct init_mm = INIT_MM(init_mm); + +struct pt_regs fake_swapper_regs; + +/* + * Initial thread structure. + * + * We need to make sure that this is THREAD_SIZE-byte aligned due + * to the way process stacks are handled. This is done by having a + * special "init_task" linker map entry.. + */ +union thread_union init_thread_union + __attribute__((__section__(".data.init_task"))) = + { INIT_THREAD_INFO(init_task) }; + +/* + * Initial task structure. + * + * All other task structs will be allocated on slabs in fork.c + */ +struct task_struct init_task = INIT_TASK(init_task); + diff --git a/arch/sh64/kernel/irq.c b/arch/sh64/kernel/irq.c new file mode 100644 index 0000000..9fc2b71 --- /dev/null +++ b/arch/sh64/kernel/irq.c @@ -0,0 +1,116 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/irq.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003 Paul Mundt + * + */ + +/* + * IRQs are in fact implemented a bit like signal handlers for the kernel. + * Naturally it's not a 1:1 relation, but there are similarities. + */ + +#include <linux/config.h> +#include <linux/errno.h> +#include <linux/kernel_stat.h> +#include <linux/signal.h> +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/timex.h> +#include <linux/slab.h> +#include <linux/random.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/init.h> +#include <linux/seq_file.h> +#include <linux/bitops.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/smp.h> +#include <asm/pgalloc.h> +#include <asm/delay.h> +#include <asm/irq.h> +#include <linux/irq.h> + +void ack_bad_irq(unsigned int irq) +{ + printk("unexpected IRQ trap at irq %02x\n", irq); +} + +#if defined(CONFIG_PROC_FS) +int show_interrupts(struct seq_file *p, void *v) +{ + int i = *(loff_t *) v, j; + struct irqaction * action; + unsigned long flags; + + if (i == 0) { + seq_puts(p, " "); + for (j=0; j<NR_CPUS; j++) + if (cpu_online(j)) + seq_printf(p, "CPU%d ",j); + seq_putc(p, '\n'); + } + + if (i < NR_IRQS) { + spin_lock_irqsave(&irq_desc[i].lock, flags); + action = irq_desc[i].action; + if (!action) + goto unlock; + seq_printf(p, "%3d: ",i); + seq_printf(p, "%10u ", kstat_irqs(i)); + seq_printf(p, " %14s", irq_desc[i].handler->typename); + seq_printf(p, " %s", action->name); + + for (action=action->next; action; action = action->next) + seq_printf(p, ", %s", action->name); + seq_putc(p, '\n'); +unlock: + spin_unlock_irqrestore(&irq_desc[i].lock, flags); + } + return 0; +} +#endif + +/* + * do_NMI handles all Non-Maskable Interrupts. + */ +asmlinkage void do_NMI(unsigned long vector_num, struct pt_regs * regs) +{ + if (regs->sr & 0x40000000) + printk("unexpected NMI trap in system mode\n"); + else + printk("unexpected NMI trap in user mode\n"); + + /* No statistics */ +} + +/* + * do_IRQ handles all normal device IRQ's. + */ +asmlinkage int do_IRQ(unsigned long vector_num, struct pt_regs * regs) +{ + int irq; + + irq_enter(); + + irq = irq_demux(vector_num); + + if (irq >= 0) { + __do_IRQ(irq, regs); + } else { + printk("unexpected IRQ trap at vector %03lx\n", vector_num); + } + + irq_exit(); + + return 1; +} + diff --git a/arch/sh64/kernel/irq_intc.c b/arch/sh64/kernel/irq_intc.c new file mode 100644 index 0000000..43f88f3 --- /dev/null +++ b/arch/sh64/kernel/irq_intc.c @@ -0,0 +1,272 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/irq_intc.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003 Paul Mundt + * + * Interrupt Controller support for SH5 INTC. + * Per-interrupt selective. IRLM=0 (Fixed priority) is not + * supported being useless without a cascaded interrupt + * controller. + * + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/stddef.h> +#include <linux/bitops.h> /* this includes also <asm/registers.h */ + /* which is required to remap register */ + /* names used into __asm__ blocks... */ + +#include <asm/hardware.h> +#include <asm/platform.h> +#include <asm/page.h> +#include <asm/io.h> +#include <asm/irq.h> + +/* + * Maybe the generic Peripheral block could move to a more + * generic include file. INTC Block will be defined here + * and only here to make INTC self-contained in a single + * file. + */ +#define INTC_BLOCK_OFFSET 0x01000000 + +/* Base */ +#define INTC_BASE PHYS_PERIPHERAL_BLOCK + \ + INTC_BLOCK_OFFSET + +/* Address */ +#define INTC_ICR_SET (intc_virt + 0x0) +#define INTC_ICR_CLEAR (intc_virt + 0x8) +#define INTC_INTPRI_0 (intc_virt + 0x10) +#define INTC_INTSRC_0 (intc_virt + 0x50) +#define INTC_INTSRC_1 (intc_virt + 0x58) +#define INTC_INTREQ_0 (intc_virt + 0x60) +#define INTC_INTREQ_1 (intc_virt + 0x68) +#define INTC_INTENB_0 (intc_virt + 0x70) +#define INTC_INTENB_1 (intc_virt + 0x78) +#define INTC_INTDSB_0 (intc_virt + 0x80) +#define INTC_INTDSB_1 (intc_virt + 0x88) + +#define INTC_ICR_IRLM 0x1 +#define INTC_INTPRI_PREGS 8 /* 8 Priority Registers */ +#define INTC_INTPRI_PPREG 8 /* 8 Priorities per Register */ + + +/* + * Mapper between the vector ordinal and the IRQ number + * passed to kernel/device drivers. + */ +int intc_evt_to_irq[(0xE20/0x20)+1] = { + -1, -1, -1, -1, -1, -1, -1, -1, /* 0x000 - 0x0E0 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 0x100 - 0x1E0 */ + 0, 0, 0, 0, 0, 1, 0, 0, /* 0x200 - 0x2E0 */ + 2, 0, 0, 3, 0, 0, 0, -1, /* 0x300 - 0x3E0 */ + 32, 33, 34, 35, 36, 37, 38, -1, /* 0x400 - 0x4E0 */ + -1, -1, -1, 63, -1, -1, -1, -1, /* 0x500 - 0x5E0 */ + -1, -1, 18, 19, 20, 21, 22, -1, /* 0x600 - 0x6E0 */ + 39, 40, 41, 42, -1, -1, -1, -1, /* 0x700 - 0x7E0 */ + 4, 5, 6, 7, -1, -1, -1, -1, /* 0x800 - 0x8E0 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 0x900 - 0x9E0 */ + 12, 13, 14, 15, 16, 17, -1, -1, /* 0xA00 - 0xAE0 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 0xB00 - 0xBE0 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 0xC00 - 0xCE0 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 0xD00 - 0xDE0 */ + -1, -1 /* 0xE00 - 0xE20 */ +}; + +/* + * Opposite mapper. + */ +static int IRQ_to_vectorN[NR_INTC_IRQS] = { + 0x12, 0x15, 0x18, 0x1B, 0x40, 0x41, 0x42, 0x43, /* 0- 7 */ + -1, -1, -1, -1, 0x50, 0x51, 0x52, 0x53, /* 8-15 */ + 0x54, 0x55, 0x32, 0x33, 0x34, 0x35, 0x36, -1, /* 16-23 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 24-31 */ + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x38, /* 32-39 */ + 0x39, 0x3A, 0x3B, -1, -1, -1, -1, -1, /* 40-47 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 48-55 */ + -1, -1, -1, -1, -1, -1, -1, 0x2B, /* 56-63 */ + +}; + +static unsigned long intc_virt; + +static unsigned int startup_intc_irq(unsigned int irq); +static void shutdown_intc_irq(unsigned int irq); +static void enable_intc_irq(unsigned int irq); +static void disable_intc_irq(unsigned int irq); +static void mask_and_ack_intc(unsigned int); +static void end_intc_irq(unsigned int irq); + +static struct hw_interrupt_type intc_irq_type = { + "INTC", + startup_intc_irq, + shutdown_intc_irq, + enable_intc_irq, + disable_intc_irq, + mask_and_ack_intc, + end_intc_irq +}; + +static int irlm; /* IRL mode */ + +static unsigned int startup_intc_irq(unsigned int irq) +{ + enable_intc_irq(irq); + return 0; /* never anything pending */ +} + +static void shutdown_intc_irq(unsigned int irq) +{ + disable_intc_irq(irq); +} + +static void enable_intc_irq(unsigned int irq) +{ + unsigned long reg; + unsigned long bitmask; + + if ((irq <= IRQ_IRL3) && (irlm == NO_PRIORITY)) + printk("Trying to use straight IRL0-3 with an encoding platform.\n"); + + if (irq < 32) { + reg = INTC_INTENB_0; + bitmask = 1 << irq; + } else { + reg = INTC_INTENB_1; + bitmask = 1 << (irq - 32); + } + + ctrl_outl(bitmask, reg); +} + +static void disable_intc_irq(unsigned int irq) +{ + unsigned long reg; + unsigned long bitmask; + + if (irq < 32) { + reg = INTC_INTDSB_0; + bitmask = 1 << irq; + } else { + reg = INTC_INTDSB_1; + bitmask = 1 << (irq - 32); + } + + ctrl_outl(bitmask, reg); +} + +static void mask_and_ack_intc(unsigned int irq) +{ + disable_intc_irq(irq); +} + +static void end_intc_irq(unsigned int irq) +{ + enable_intc_irq(irq); +} + +/* For future use, if we ever support IRLM=0) */ +void make_intc_irq(unsigned int irq) +{ + disable_irq_nosync(irq); + irq_desc[irq].handler = &intc_irq_type; + disable_intc_irq(irq); +} + +#if defined(CONFIG_PROC_FS) && defined(CONFIG_SYSCTL) +int intc_irq_describe(char* p, int irq) +{ + if (irq < NR_INTC_IRQS) + return sprintf(p, "(0x%3x)", IRQ_to_vectorN[irq]*0x20); + else + return 0; +} +#endif + +void __init init_IRQ(void) +{ + unsigned long long __dummy0, __dummy1=~0x00000000100000f0; + unsigned long reg; + unsigned long data; + int i; + + intc_virt = onchip_remap(INTC_BASE, 1024, "INTC"); + if (!intc_virt) { + panic("Unable to remap INTC\n"); + } + + + /* Set default: per-line enable/disable, priority driven ack/eoi */ + for (i = 0; i < NR_INTC_IRQS; i++) { + if (platform_int_priority[i] != NO_PRIORITY) { + irq_desc[i].handler = &intc_irq_type; + } + } + + + /* Disable all interrupts and set all priorities to 0 to avoid trouble */ + ctrl_outl(-1, INTC_INTDSB_0); + ctrl_outl(-1, INTC_INTDSB_1); + + for (reg = INTC_INTPRI_0, i = 0; i < INTC_INTPRI_PREGS; i++, reg += 8) + ctrl_outl( NO_PRIORITY, reg); + + + /* Set IRLM */ + /* If all the priorities are set to 'no priority', then + * assume we are using encoded mode. + */ + irlm = platform_int_priority[IRQ_IRL0] + platform_int_priority[IRQ_IRL1] + \ + platform_int_priority[IRQ_IRL2] + platform_int_priority[IRQ_IRL3]; + + if (irlm == NO_PRIORITY) { + /* IRLM = 0 */ + reg = INTC_ICR_CLEAR; + i = IRQ_INTA; + printk("Trying to use encoded IRL0-3. IRLs unsupported.\n"); + } else { + /* IRLM = 1 */ + reg = INTC_ICR_SET; + i = IRQ_IRL0; + } + ctrl_outl(INTC_ICR_IRLM, reg); + + /* Set interrupt priorities according to platform description */ + for (data = 0, reg = INTC_INTPRI_0; i < NR_INTC_IRQS; i++) { + data |= platform_int_priority[i] << ((i % INTC_INTPRI_PPREG) * 4); + if ((i % INTC_INTPRI_PPREG) == (INTC_INTPRI_PPREG - 1)) { + /* Upon the 7th, set Priority Register */ + ctrl_outl(data, reg); + data = 0; + reg += 8; + } + } + +#ifdef CONFIG_SH_CAYMAN + { + extern void init_cayman_irq(void); + + init_cayman_irq(); + } +#endif + + /* + * And now let interrupts come in. + * sti() is not enough, we need to + * lower priority, too. + */ + __asm__ __volatile__("getcon " __SR ", %0\n\t" + "and %0, %1, %0\n\t" + "putcon %0, " __SR "\n\t" + : "=&r" (__dummy0) + : "r" (__dummy1)); +} diff --git a/arch/sh64/kernel/led.c b/arch/sh64/kernel/led.c new file mode 100644 index 0000000..cf993c4 --- /dev/null +++ b/arch/sh64/kernel/led.c @@ -0,0 +1,41 @@ +/* + * arch/sh64/kernel/led.c + * + * Copyright (C) 2002 Stuart Menefy <stuart.menefy@st.com> + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * Flash the LEDs + */ +#include <linux/config.h> +#include <linux/stddef.h> +#include <linux/sched.h> + +void mach_led(int pos, int val); + +/* acts like an actual heart beat -- ie thump-thump-pause... */ +void heartbeat(void) +{ + static unsigned int cnt = 0, period = 0, dist = 0; + + if (cnt == 0 || cnt == dist) { + mach_led(-1, 1); + } else if (cnt == 7 || cnt == dist + 7) { + mach_led(-1, 0); + } + + if (++cnt > period) { + cnt = 0; + + /* + * The hyperbolic function below modifies the heartbeat period + * length in dependency of the current (5min) load. It goes + * through the points f(0)=126, f(1)=86, f(5)=51, f(inf)->30. + */ + period = ((672 << FSHIFT) / (5 * avenrun[0] + + (7 << FSHIFT))) + 30; + dist = period / 4; + } +} + diff --git a/arch/sh64/kernel/module.c b/arch/sh64/kernel/module.c new file mode 100644 index 0000000..2598f6b --- /dev/null +++ b/arch/sh64/kernel/module.c @@ -0,0 +1,161 @@ +/* Kernel module help for sh64. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + Copyright 2004 SuperH (UK) Ltd + Author: Richard Curnow + + Based on the sh version, and on code from the sh64-specific parts of + modutils, originally written by Richard Curnow and Ben Gaster. + +*/ +#include <linux/moduleloader.h> +#include <linux/elf.h> +#include <linux/vmalloc.h> +#include <linux/fs.h> +#include <linux/string.h> +#include <linux/kernel.h> + +#if 0 +#define DEBUGP printk +#else +#define DEBUGP(fmt...) +#endif + +void *module_alloc(unsigned long size) +{ + if (size == 0) + return NULL; + return vmalloc(size); +} + + +/* Free memory returned from module_alloc */ +void module_free(struct module *mod, void *module_region) +{ + vfree(module_region); + /* FIXME: If module_region == mod->init_region, trim exception + table entries. */ +} + +/* We don't need anything special. */ +int module_frob_arch_sections(Elf_Ehdr *hdr, + Elf_Shdr *sechdrs, + char *secstrings, + struct module *mod) +{ + return 0; +} + +int apply_relocate_add(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + unsigned int i; + Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; + Elf32_Sym *sym; + Elf32_Addr relocation; + uint32_t *location; + int align; + int is_shmedia; + + DEBUGP("Applying relocate section %u to %u\n", relsec, + sechdrs[relsec].sh_info); + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { + /* This is where to make the change */ + location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr + + rel[i].r_offset; + /* This is the symbol it is referring to. Note that all + undefined symbols have been resolved. */ + sym = (Elf32_Sym *)sechdrs[symindex].sh_addr + + ELF32_R_SYM(rel[i].r_info); + relocation = sym->st_value + rel[i].r_addend; + align = (int)location & 3; + + /* For text addresses, bit2 of the st_other field indicates + * whether the symbol is SHmedia (1) or SHcompact (0). If + * SHmedia, the LSB of the symbol needs to be asserted + * for the CPU to be in SHmedia mode when it starts executing + * the branch target. */ + is_shmedia = (sym->st_other & 4) ? 1 : 0; + if (is_shmedia) { + relocation |= 1; + } + + switch (ELF32_R_TYPE(rel[i].r_info)) { + case R_SH_DIR32: + DEBUGP("R_SH_DIR32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation); + *location += relocation; + break; + case R_SH_REL32: + DEBUGP("R_SH_REL32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation); + relocation -= (Elf32_Addr) location; + *location += relocation; + break; + case R_SH_IMM_LOW16: + DEBUGP("R_SH_IMM_LOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation); + *location = (*location & ~0x3fffc00) | + ((relocation & 0xffff) << 10); + break; + case R_SH_IMM_MEDLOW16: + DEBUGP("R_SH_IMM_MEDLOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation); + *location = (*location & ~0x3fffc00) | + (((relocation >> 16) & 0xffff) << 10); + break; + case R_SH_IMM_LOW16_PCREL: + DEBUGP("R_SH_IMM_LOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation); + relocation -= (Elf32_Addr) location; + *location = (*location & ~0x3fffc00) | + ((relocation & 0xffff) << 10); + break; + case R_SH_IMM_MEDLOW16_PCREL: + DEBUGP("R_SH_IMM_MEDLOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation); + relocation -= (Elf32_Addr) location; + *location = (*location & ~0x3fffc00) | + (((relocation >> 16) & 0xffff) << 10); + break; + default: + printk(KERN_ERR "module %s: Unknown relocation: %u\n", + me->name, ELF32_R_TYPE(rel[i].r_info)); + return -ENOEXEC; + } + } + return 0; +} + +int apply_relocate(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + printk(KERN_ERR "module %s: REL RELOCATION unsupported\n", + me->name); + return -ENOEXEC; +} + +int module_finalize(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, + struct module *me) +{ + return 0; +} + +void module_arch_cleanup(struct module *mod) +{ +} + diff --git a/arch/sh64/kernel/pci-dma.c b/arch/sh64/kernel/pci-dma.c new file mode 100644 index 0000000..a36c3d7 --- /dev/null +++ b/arch/sh64/kernel/pci-dma.c @@ -0,0 +1,50 @@ +/* + * Copyright (C) 2001 David J. Mckay (david.mckay@st.com) + * Copyright (C) 2003 Paul Mundt (lethal@linux-sh.org) + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * Dynamic DMA mapping support. + */ +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/string.h> +#include <linux/pci.h> +#include <asm/io.h> + +void *consistent_alloc(struct pci_dev *hwdev, size_t size, + dma_addr_t *dma_handle) +{ + void *ret; + int gfp = GFP_ATOMIC; + void *vp; + + if (hwdev == NULL || hwdev->dma_mask != 0xffffffff) + gfp |= GFP_DMA; + + ret = (void *)__get_free_pages(gfp, get_order(size)); + + /* now call our friend ioremap_nocache to give us an uncached area */ + vp = ioremap_nocache(virt_to_phys(ret), size); + + if (vp != NULL) { + memset(vp, 0, size); + *dma_handle = virt_to_bus(ret); + dma_cache_wback_inv((unsigned long)ret, size); + } + + return vp; +} + +void consistent_free(struct pci_dev *hwdev, size_t size, + void *vaddr, dma_addr_t dma_handle) +{ + void *alloc; + + alloc = bus_to_virt((unsigned long)dma_handle); + free_pages((unsigned long)alloc, get_order(size)); + + iounmap(vaddr); +} + diff --git a/arch/sh64/kernel/pci_sh5.c b/arch/sh64/kernel/pci_sh5.c new file mode 100644 index 0000000..6197879 --- /dev/null +++ b/arch/sh64/kernel/pci_sh5.c @@ -0,0 +1,541 @@ +/* + * Copyright (C) 2001 David J. Mckay (david.mckay@st.com) + * Copyright (C) 2003, 2004 Paul Mundt + * Copyright (C) 2004 Richard Curnow + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * Support functions for the SH5 PCI hardware. + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/rwsem.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/types.h> +#include <asm/pci.h> +#include <linux/irq.h> + +#include <asm/io.h> +#include <asm/hardware.h> +#include "pci_sh5.h" + +static unsigned long pcicr_virt; +unsigned long pciio_virt; + +static void __init pci_fixup_ide_bases(struct pci_dev *d) +{ + int i; + + /* + * PCI IDE controllers use non-standard I/O port decoding, respect it. + */ + if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE) + return; + printk("PCI: IDE base address fixup for %s\n", pci_name(d)); + for(i=0; i<4; i++) { + struct resource *r = &d->resource[i]; + if ((r->start & ~0x80) == 0x374) { + r->start |= 2; + r->end = r->start; + } + } +} +DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases); + +char * __init pcibios_setup(char *str) +{ + return str; +} + +/* Rounds a number UP to the nearest power of two. Used for + * sizing the PCI window. + */ +static u32 __init r2p2(u32 num) +{ + int i = 31; + u32 tmp = num; + + if (num == 0) + return 0; + + do { + if (tmp & (1 << 31)) + break; + i--; + tmp <<= 1; + } while (i >= 0); + + tmp = 1 << i; + /* If the original number isn't a power of 2, round it up */ + if (tmp != num) + tmp <<= 1; + + return tmp; +} + +extern unsigned long long memory_start, memory_end; + +int __init sh5pci_init(unsigned memStart, unsigned memSize) +{ + u32 lsr0; + u32 uval; + + pcicr_virt = onchip_remap(SH5PCI_ICR_BASE, 1024, "PCICR"); + if (!pcicr_virt) { + panic("Unable to remap PCICR\n"); + } + + pciio_virt = onchip_remap(SH5PCI_IO_BASE, 0x10000, "PCIIO"); + if (!pciio_virt) { + panic("Unable to remap PCIIO\n"); + } + + pr_debug("Register base addres is 0x%08lx\n", pcicr_virt); + + /* Clear snoop registers */ + SH5PCI_WRITE(CSCR0, 0); + SH5PCI_WRITE(CSCR1, 0); + + pr_debug("Wrote to reg\n"); + + /* Switch off interrupts */ + SH5PCI_WRITE(INTM, 0); + SH5PCI_WRITE(AINTM, 0); + SH5PCI_WRITE(PINTM, 0); + + /* Set bus active, take it out of reset */ + uval = SH5PCI_READ(CR); + + /* Set command Register */ + SH5PCI_WRITE(CR, uval | CR_LOCK_MASK | CR_CFINT| CR_FTO | CR_PFE | CR_PFCS | CR_BMAM); + + uval=SH5PCI_READ(CR); + pr_debug("CR is actually 0x%08x\n",uval); + + /* Allow it to be a master */ + /* NB - WE DISABLE I/O ACCESS to stop overlap */ + /* set WAIT bit to enable stepping, an attempt to improve stability */ + SH5PCI_WRITE_SHORT(CSR_CMD, + PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_WAIT); + + /* + ** Set translation mapping memory in order to convert the address + ** used for the main bus, to the PCI internal address. + */ + SH5PCI_WRITE(MBR,0x40000000); + + /* Always set the max size 512M */ + SH5PCI_WRITE(MBMR, PCISH5_MEM_SIZCONV(512*1024*1024)); + + /* + ** I/O addresses are mapped at internal PCI specific address + ** as is described into the configuration bridge table. + ** These are changed to 0, to allow cards that have legacy + ** io such as vga to function correctly. We set the SH5 IOBAR to + ** 256K, which is a bit big as we can only have 64K of address space + */ + + SH5PCI_WRITE(IOBR,0x0); + + pr_debug("PCI:Writing 0x%08x to IOBR\n",0); + + /* Set up a 256K window. Totally pointless waste of address space */ + SH5PCI_WRITE(IOBMR,0); + pr_debug("PCI:Writing 0x%08x to IOBMR\n",0); + + /* The SH5 has a HUGE 256K I/O region, which breaks the PCI spec. Ideally, + * we would want to map the I/O region somewhere, but it is so big this is not + * that easy! + */ + SH5PCI_WRITE(CSR_IBAR0,~0); + /* Set memory size value */ + memSize = memory_end - memory_start; + + /* Now we set up the mbars so the PCI bus can see the memory of the machine */ + if (memSize < (1024 * 1024)) { + printk(KERN_ERR "PCISH5: Ridiculous memory size of 0x%x?\n", memSize); + return -EINVAL; + } + + /* Set LSR 0 */ + lsr0 = (memSize > (512 * 1024 * 1024)) ? 0x1ff00001 : ((r2p2(memSize) - 0x100000) | 0x1); + SH5PCI_WRITE(LSR0, lsr0); + + pr_debug("PCI:Writing 0x%08x to LSR0\n",lsr0); + + /* Set MBAR 0 */ + SH5PCI_WRITE(CSR_MBAR0, memory_start); + SH5PCI_WRITE(LAR0, memory_start); + + SH5PCI_WRITE(CSR_MBAR1,0); + SH5PCI_WRITE(LAR1,0); + SH5PCI_WRITE(LSR1,0); + + pr_debug("PCI:Writing 0x%08llx to CSR_MBAR0\n",memory_start); + pr_debug("PCI:Writing 0x%08llx to LAR0\n",memory_start); + + /* Enable the PCI interrupts on the device */ + SH5PCI_WRITE(INTM, ~0); + SH5PCI_WRITE(AINTM, ~0); + SH5PCI_WRITE(PINTM, ~0); + + pr_debug("Switching on all error interrupts\n"); + + return(0); +} + +static int sh5pci_read(struct pci_bus *bus, unsigned int devfn, int where, + int size, u32 *val) +{ + SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where)); + + switch (size) { + case 1: + *val = (u8)SH5PCI_READ_BYTE(PDR + (where & 3)); + break; + case 2: + *val = (u16)SH5PCI_READ_SHORT(PDR + (where & 2)); + break; + case 4: + *val = SH5PCI_READ(PDR); + break; + } + + return PCIBIOS_SUCCESSFUL; +} + +static int sh5pci_write(struct pci_bus *bus, unsigned int devfn, int where, + int size, u32 val) +{ + SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where)); + + switch (size) { + case 1: + SH5PCI_WRITE_BYTE(PDR + (where & 3), (u8)val); + break; + case 2: + SH5PCI_WRITE_SHORT(PDR + (where & 2), (u16)val); + break; + case 4: + SH5PCI_WRITE(PDR, val); + break; + } + + return PCIBIOS_SUCCESSFUL; +} + +static struct pci_ops pci_config_ops = { + .read = sh5pci_read, + .write = sh5pci_write, +}; + +/* Everything hangs off this */ +static struct pci_bus *pci_root_bus; + + +static u8 __init no_swizzle(struct pci_dev *dev, u8 * pin) +{ + pr_debug("swizzle for dev %d on bus %d slot %d pin is %d\n", + dev->devfn,dev->bus->number, PCI_SLOT(dev->devfn),*pin); + return PCI_SLOT(dev->devfn); +} + +static inline u8 bridge_swizzle(u8 pin, u8 slot) +{ + return (((pin-1) + slot) % 4) + 1; +} + +u8 __init common_swizzle(struct pci_dev *dev, u8 *pinp) +{ + if (dev->bus->number != 0) { + u8 pin = *pinp; + do { + pin = bridge_swizzle(pin, PCI_SLOT(dev->devfn)); + /* Move up the chain of bridges. */ + dev = dev->bus->self; + } while (dev->bus->self); + *pinp = pin; + + /* The slot is the slot of the last bridge. */ + } + + return PCI_SLOT(dev->devfn); +} + +/* This needs to be shunted out of here into the board specific bit */ + +static int __init map_cayman_irq(struct pci_dev *dev, u8 slot, u8 pin) +{ + int result = -1; + + /* The complication here is that the PCI IRQ lines from the Cayman's 2 + 5V slots get into the CPU via a different path from the IRQ lines + from the 3 3.3V slots. Thus, we have to detect whether the card's + interrupts go via the 5V or 3.3V path, i.e. the 'bridge swizzling' + at the point where we cross from 5V to 3.3V is not the normal case. + + The added complication is that we don't know that the 5V slots are + always bus 2, because a card containing a PCI-PCI bridge may be + plugged into a 3.3V slot, and this changes the bus numbering. + + Also, the Cayman has an intermediate PCI bus that goes a custom + expansion board header (and to the secondary bridge). This bus has + never been used in practice. + + The 1ary onboard PCI-PCI bridge is device 3 on bus 0 + The 2ary onboard PCI-PCI bridge is device 0 on the 2ary bus of the 1ary bridge. + */ + + struct slot_pin { + int slot; + int pin; + } path[4]; + int i=0; + + while (dev->bus->number > 0) { + + slot = path[i].slot = PCI_SLOT(dev->devfn); + pin = path[i].pin = bridge_swizzle(pin, slot); + dev = dev->bus->self; + i++; + if (i > 3) panic("PCI path to root bus too long!\n"); + } + + slot = PCI_SLOT(dev->devfn); + /* This is the slot on bus 0 through which the device is eventually + reachable. */ + + /* Now work back up. */ + if ((slot < 3) || (i == 0)) { + /* Bus 0 (incl. PCI-PCI bridge itself) : perform the final + swizzle now. */ + result = IRQ_INTA + bridge_swizzle(pin, slot) - 1; + } else { + i--; + slot = path[i].slot; + pin = path[i].pin; + if (slot > 0) { + panic("PCI expansion bus device found - not handled!\n"); + } else { + if (i > 0) { + /* 5V slots */ + i--; + slot = path[i].slot; + pin = path[i].pin; + /* 'pin' was swizzled earlier wrt slot, don't do it again. */ + result = IRQ_P2INTA + (pin - 1); + } else { + /* IRQ for 2ary PCI-PCI bridge : unused */ + result = -1; + } + } + } + + return result; +} + +irqreturn_t pcish5_err_irq(int irq, void *dev_id, struct pt_regs *regs) +{ + unsigned pci_int, pci_air, pci_cir, pci_aint; + + pci_int = SH5PCI_READ(INT); + pci_cir = SH5PCI_READ(CIR); + pci_air = SH5PCI_READ(AIR); + + if (pci_int) { + printk("PCI INTERRUPT (at %08llx)!\n", regs->pc); + printk("PCI INT -> 0x%x\n", pci_int & 0xffff); + printk("PCI AIR -> 0x%x\n", pci_air); + printk("PCI CIR -> 0x%x\n", pci_cir); + SH5PCI_WRITE(INT, ~0); + } + + pci_aint = SH5PCI_READ(AINT); + if (pci_aint) { + printk("PCI ARB INTERRUPT!\n"); + printk("PCI AINT -> 0x%x\n", pci_aint); + printk("PCI AIR -> 0x%x\n", pci_air); + printk("PCI CIR -> 0x%x\n", pci_cir); + SH5PCI_WRITE(AINT, ~0); + } + + return IRQ_HANDLED; +} + +irqreturn_t pcish5_serr_irq(int irq, void *dev_id, struct pt_regs *regs) +{ + printk("SERR IRQ\n"); + + return IRQ_NONE; +} + +#define ROUND_UP(x, a) (((x) + (a) - 1) & ~((a) - 1)) + +static void __init +pcibios_size_bridge(struct pci_bus *bus, struct resource *ior, + struct resource *memr) +{ + struct resource io_res, mem_res; + struct pci_dev *dev; + struct pci_dev *bridge = bus->self; + struct list_head *ln; + + if (!bridge) + return; /* host bridge, nothing to do */ + + /* set reasonable default locations for pcibios_align_resource */ + io_res.start = PCIBIOS_MIN_IO; + mem_res.start = PCIBIOS_MIN_MEM; + + io_res.end = io_res.start; + mem_res.end = mem_res.start; + + /* Collect information about how our direct children are layed out. */ + for (ln=bus->devices.next; ln != &bus->devices; ln=ln->next) { + int i; + dev = pci_dev_b(ln); + + /* Skip bridges for now */ + if (dev->class >> 8 == PCI_CLASS_BRIDGE_PCI) + continue; + + for (i = 0; i < PCI_NUM_RESOURCES; i++) { + struct resource res; + unsigned long size; + + memcpy(&res, &dev->resource[i], sizeof(res)); + size = res.end - res.start + 1; + + if (res.flags & IORESOURCE_IO) { + res.start = io_res.end; + pcibios_align_resource(dev, &res, size, 0); + io_res.end = res.start + size; + } else if (res.flags & IORESOURCE_MEM) { + res.start = mem_res.end; + pcibios_align_resource(dev, &res, size, 0); + mem_res.end = res.start + size; + } + } + } + + /* And for all of the subordinate busses. */ + for (ln=bus->children.next; ln != &bus->children; ln=ln->next) + pcibios_size_bridge(pci_bus_b(ln), &io_res, &mem_res); + + /* turn the ending locations into sizes (subtract start) */ + io_res.end -= io_res.start; + mem_res.end -= mem_res.start; + + /* Align the sizes up by bridge rules */ + io_res.end = ROUND_UP(io_res.end, 4*1024) - 1; + mem_res.end = ROUND_UP(mem_res.end, 1*1024*1024) - 1; + + /* Adjust the bridge's allocation requirements */ + bridge->resource[0].end = bridge->resource[0].start + io_res.end; + bridge->resource[1].end = bridge->resource[1].start + mem_res.end; + + bridge->resource[PCI_BRIDGE_RESOURCES].end = + bridge->resource[PCI_BRIDGE_RESOURCES].start + io_res.end; + bridge->resource[PCI_BRIDGE_RESOURCES+1].end = + bridge->resource[PCI_BRIDGE_RESOURCES+1].start + mem_res.end; + + /* adjust parent's resource requirements */ + if (ior) { + ior->end = ROUND_UP(ior->end, 4*1024); + ior->end += io_res.end; + } + + if (memr) { + memr->end = ROUND_UP(memr->end, 1*1024*1024); + memr->end += mem_res.end; + } +} + +#undef ROUND_UP + +static void __init pcibios_size_bridges(void) +{ + struct resource io_res, mem_res; + + memset(&io_res, 0, sizeof(io_res)); + memset(&mem_res, 0, sizeof(mem_res)); + + pcibios_size_bridge(pci_root_bus, &io_res, &mem_res); +} + +static int __init pcibios_init(void) +{ + if (request_irq(IRQ_ERR, pcish5_err_irq, + SA_INTERRUPT, "PCI Error",NULL) < 0) { + printk(KERN_ERR "PCISH5: Cannot hook PCI_PERR interrupt\n"); + return -EINVAL; + } + + if (request_irq(IRQ_SERR, pcish5_serr_irq, + SA_INTERRUPT, "PCI SERR interrupt", NULL) < 0) { + printk(KERN_ERR "PCISH5: Cannot hook PCI_SERR interrupt\n"); + return -EINVAL; + } + + /* The pci subsytem needs to know where memory is and how much + * of it there is. I've simply made these globals. A better mechanism + * is probably needed. + */ + sh5pci_init(__pa(memory_start), + __pa(memory_end) - __pa(memory_start)); + + pci_root_bus = pci_scan_bus(0, &pci_config_ops, NULL); + pcibios_size_bridges(); + pci_assign_unassigned_resources(); + pci_fixup_irqs(no_swizzle, map_cayman_irq); + + return 0; +} + +subsys_initcall(pcibios_init); + +void __init pcibios_fixup_bus(struct pci_bus *bus) +{ + struct pci_dev *dev = bus->self; + int i; + +#if 1 + if(dev) { + for(i=0; i<3; i++) { + bus->resource[i] = + &dev->resource[PCI_BRIDGE_RESOURCES+i]; + bus->resource[i]->name = bus->name; + } + bus->resource[0]->flags |= IORESOURCE_IO; + bus->resource[1]->flags |= IORESOURCE_MEM; + + /* For now, propagate host limits to the bus; + * we'll adjust them later. */ + +#if 1 + bus->resource[0]->end = 64*1024 - 1 ; + bus->resource[1]->end = PCIBIOS_MIN_MEM+(256*1024*1024)-1; + bus->resource[0]->start = PCIBIOS_MIN_IO; + bus->resource[1]->start = PCIBIOS_MIN_MEM; +#else + bus->resource[0]->end = 0 + bus->resource[1]->end = 0 + bus->resource[0]->start =0 + bus->resource[1]->start = 0; +#endif + /* Turn off downstream PF memory address range by default */ + bus->resource[2]->start = 1024*1024; + bus->resource[2]->end = bus->resource[2]->start - 1; + } +#endif + +} + diff --git a/arch/sh64/kernel/pci_sh5.h b/arch/sh64/kernel/pci_sh5.h new file mode 100644 index 0000000..8f21f5d --- /dev/null +++ b/arch/sh64/kernel/pci_sh5.h @@ -0,0 +1,107 @@ +/* + * Copyright (C) 2001 David J. Mckay (david.mckay@st.com) + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * Defintions for the SH5 PCI hardware. + */ + +/* Product ID */ +#define PCISH5_PID 0x350d + +/* vendor ID */ +#define PCISH5_VID 0x1054 + +/* Configuration types */ +#define ST_TYPE0 0x00 /* Configuration cycle type 0 */ +#define ST_TYPE1 0x01 /* Configuration cycle type 1 */ + +/* VCR data */ +#define PCISH5_VCR_STATUS 0x00 +#define PCISH5_VCR_VERSION 0x08 + +/* +** ICR register offsets and bits +*/ +#define PCISH5_ICR_CR 0x100 /* PCI control register values */ +#define CR_PBAM (1<<12) +#define CR_PFCS (1<<11) +#define CR_FTO (1<<10) +#define CR_PFE (1<<9) +#define CR_TBS (1<<8) +#define CR_SPUE (1<<7) +#define CR_BMAM (1<<6) +#define CR_HOST (1<<5) +#define CR_CLKEN (1<<4) +#define CR_SOCS (1<<3) +#define CR_IOCS (1<<2) +#define CR_RSTCTL (1<<1) +#define CR_CFINT (1<<0) +#define CR_LOCK_MASK 0xa5000000 + +#define PCISH5_ICR_INT 0x114 /* Interrupt registert values */ +#define INT_MADIM (1<<2) + +#define PCISH5_ICR_LSR0 0X104 /* Local space register values */ +#define PCISH5_ICR_LSR1 0X108 /* Local space register values */ +#define PCISH5_ICR_LAR0 0x10c /* Local address register values */ +#define PCISH5_ICR_LAR1 0x110 /* Local address register values */ +#define PCISH5_ICR_INTM 0x118 /* Interrupt mask register values */ +#define PCISH5_ICR_AIR 0x11c /* Interrupt error address information register values */ +#define PCISH5_ICR_CIR 0x120 /* Interrupt error command information register values */ +#define PCISH5_ICR_AINT 0x130 /* Interrupt error arbiter interrupt register values */ +#define PCISH5_ICR_AINTM 0x134 /* Interrupt error arbiter interrupt mask register values */ +#define PCISH5_ICR_BMIR 0x138 /* Interrupt error info register of bus master values */ +#define PCISH5_ICR_PAR 0x1c0 /* Pio address register values */ +#define PCISH5_ICR_MBR 0x1c4 /* Memory space bank register values */ +#define PCISH5_ICR_IOBR 0x1c8 /* I/O space bank register values */ +#define PCISH5_ICR_PINT 0x1cc /* power management interrupt register values */ +#define PCISH5_ICR_PINTM 0x1d0 /* power management interrupt mask register values */ +#define PCISH5_ICR_MBMR 0x1d8 /* memory space bank mask register values */ +#define PCISH5_ICR_IOBMR 0x1dc /* I/O space bank mask register values */ +#define PCISH5_ICR_CSCR0 0x210 /* PCI cache snoop control register 0 */ +#define PCISH5_ICR_CSCR1 0x214 /* PCI cache snoop control register 1 */ +#define PCISH5_ICR_PDR 0x220 /* Pio data register values */ + +/* These are configs space registers */ +#define PCISH5_ICR_CSR_VID 0x000 /* Vendor id */ +#define PCISH5_ICR_CSR_DID 0x002 /* Device id */ +#define PCISH5_ICR_CSR_CMD 0x004 /* Command register */ +#define PCISH5_ICR_CSR_STATUS 0x006 /* Stautus */ +#define PCISH5_ICR_CSR_IBAR0 0x010 /* I/O base address register */ +#define PCISH5_ICR_CSR_MBAR0 0x014 /* First Memory base address register */ +#define PCISH5_ICR_CSR_MBAR1 0x018 /* Second Memory base address register */ + + + +/* Base address of registers */ +#define SH5PCI_ICR_BASE (PHYS_PCI_BLOCK + 0x00040000) +#define SH5PCI_IO_BASE (PHYS_PCI_BLOCK + 0x00800000) +/* #define SH5PCI_VCR_BASE (P2SEG_PCICB_BLOCK + P2SEG) */ + +/* Register selection macro */ +#define PCISH5_ICR_REG(x) ( pcicr_virt + (PCISH5_ICR_##x)) +/* #define PCISH5_VCR_REG(x) ( SH5PCI_VCR_BASE (PCISH5_VCR_##x)) */ + +/* Write I/O functions */ +#define SH5PCI_WRITE(reg,val) ctrl_outl((u32)(val),PCISH5_ICR_REG(reg)) +#define SH5PCI_WRITE_SHORT(reg,val) ctrl_outw((u16)(val),PCISH5_ICR_REG(reg)) +#define SH5PCI_WRITE_BYTE(reg,val) ctrl_outb((u8)(val),PCISH5_ICR_REG(reg)) + +/* Read I/O functions */ +#define SH5PCI_READ(reg) ctrl_inl(PCISH5_ICR_REG(reg)) +#define SH5PCI_READ_SHORT(reg) ctrl_inw(PCISH5_ICR_REG(reg)) +#define SH5PCI_READ_BYTE(reg) ctrl_inb(PCISH5_ICR_REG(reg)) + +/* Set PCI config bits */ +#define SET_CONFIG_BITS(bus,devfn,where) ((((bus) << 16) | ((devfn) << 8) | ((where) & ~3)) | 0x80000000) + +/* Set PCI command register */ +#define CONFIG_CMD(bus, devfn, where) SET_CONFIG_BITS(bus->number,devfn,where) + +/* Size converters */ +#define PCISH5_MEM_SIZCONV(x) (((x / 0x40000) - 1) << 18) +#define PCISH5_IO_SIZCONV(x) (((x / 0x40000) - 1) << 18) + + diff --git a/arch/sh64/kernel/pcibios.c b/arch/sh64/kernel/pcibios.c new file mode 100644 index 0000000..50c61dc --- /dev/null +++ b/arch/sh64/kernel/pcibios.c @@ -0,0 +1,168 @@ +/* + * $Id: pcibios.c,v 1.1 2001/08/24 12:38:19 dwmw2 Exp $ + * + * arch/sh/kernel/pcibios.c + * + * Copyright (C) 2002 STMicroelectronics Limited + * Author : David J. McKay + * + * Copyright (C) 2004 Richard Curnow, SuperH UK Limited + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * This is GPL'd. + * + * Provided here are generic versions of: + * pcibios_update_resource() + * pcibios_align_resource() + * pcibios_enable_device() + * pcibios_set_master() + * pcibios_update_irq() + * + * These functions are collected here to reduce duplication of common + * code amongst the many platform-specific PCI support code files. + * + * Platform-specific files are expected to provide: + * pcibios_fixup_bus() + * pcibios_init() + * pcibios_setup() + * pcibios_fixup_pbus_ranges() + */ + +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/init.h> + +void +pcibios_update_resource(struct pci_dev *dev, struct resource *root, + struct resource *res, int resource) +{ + u32 new, check; + int reg; + + new = res->start | (res->flags & PCI_REGION_FLAG_MASK); + if (resource < 6) { + reg = PCI_BASE_ADDRESS_0 + 4*resource; + } else if (resource == PCI_ROM_RESOURCE) { + res->flags |= IORESOURCE_ROM_ENABLE; + new |= PCI_ROM_ADDRESS_ENABLE; + reg = dev->rom_base_reg; + } else { + /* Somebody might have asked allocation of a non-standard resource */ + return; + } + + pci_write_config_dword(dev, reg, new); + pci_read_config_dword(dev, reg, &check); + if ((new ^ check) & ((new & PCI_BASE_ADDRESS_SPACE_IO) ? PCI_BASE_ADDRESS_IO_MASK : PCI_BASE_ADDRESS_MEM_MASK)) { + printk(KERN_ERR "PCI: Error while updating region " + "%s/%d (%08x != %08x)\n", pci_name(dev), resource, + new, check); + } +} + +/* + * We need to avoid collisions with `mirrored' VGA ports + * and other strange ISA hardware, so we always want the + * addresses to be allocated in the 0x000-0x0ff region + * modulo 0x400. + */ +void pcibios_align_resource(void *data, struct resource *res, + unsigned long size, unsigned long align) +{ + if (res->flags & IORESOURCE_IO) { + unsigned long start = res->start; + + if (start & 0x300) { + start = (start + 0x3ff) & ~0x3ff; + res->start = start; + } + } +} + +static void pcibios_enable_bridge(struct pci_dev *dev) +{ + struct pci_bus *bus = dev->subordinate; + u16 cmd, old_cmd; + + pci_read_config_word(dev, PCI_COMMAND, &cmd); + old_cmd = cmd; + + if (bus->resource[0]->flags & IORESOURCE_IO) { + cmd |= PCI_COMMAND_IO; + } + if ((bus->resource[1]->flags & IORESOURCE_MEM) || + (bus->resource[2]->flags & IORESOURCE_PREFETCH)) { + cmd |= PCI_COMMAND_MEMORY; + } + + if (cmd != old_cmd) { + pci_write_config_word(dev, PCI_COMMAND, cmd); + } + + printk("PCI bridge %s, command register -> %04x\n", + pci_name(dev), cmd); + +} + + + +int pcibios_enable_device(struct pci_dev *dev, int mask) +{ + u16 cmd, old_cmd; + int idx; + struct resource *r; + + if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { + pcibios_enable_bridge(dev); + } + + pci_read_config_word(dev, PCI_COMMAND, &cmd); + old_cmd = cmd; + for(idx=0; idx<6; idx++) { + if (!(mask & (1 << idx))) + continue; + r = &dev->resource[idx]; + if (!r->start && r->end) { + printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev)); + return -EINVAL; + } + if (r->flags & IORESOURCE_IO) + cmd |= PCI_COMMAND_IO; + if (r->flags & IORESOURCE_MEM) + cmd |= PCI_COMMAND_MEMORY; + } + if (dev->resource[PCI_ROM_RESOURCE].start) + cmd |= PCI_COMMAND_MEMORY; + if (cmd != old_cmd) { + printk(KERN_INFO "PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd); + pci_write_config_word(dev, PCI_COMMAND, cmd); + } + return 0; +} + +/* + * If we set up a device for bus mastering, we need to check and set + * the latency timer as it may not be properly set. + */ +unsigned int pcibios_max_latency = 255; + +void pcibios_set_master(struct pci_dev *dev) +{ + u8 lat; + pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat); + if (lat < 16) + lat = (64 <= pcibios_max_latency) ? 64 : pcibios_max_latency; + else if (lat > pcibios_max_latency) + lat = pcibios_max_latency; + else + return; + printk(KERN_INFO "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat); + pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat); +} + +void __init pcibios_update_irq(struct pci_dev *dev, int irq) +{ + pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq); +} diff --git a/arch/sh64/kernel/process.c b/arch/sh64/kernel/process.c new file mode 100644 index 0000000..efde41c --- /dev/null +++ b/arch/sh64/kernel/process.c @@ -0,0 +1,962 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/process.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003 Paul Mundt + * Copyright (C) 2003, 2004 Richard Curnow + * + * Started from SH3/4 version: + * Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima + * + * In turn started from i386 version: + * Copyright (C) 1995 Linus Torvalds + * + */ + +/* + * This file handles the architecture-dependent parts of process handling.. + */ + +/* Temporary flags/tests. All to be removed/undefined. BEGIN */ +#define IDLE_TRACE +#define VM_SHOW_TABLES +#define VM_TEST_FAULT +#define VM_TEST_RTLBMISS +#define VM_TEST_WTLBMISS + +#undef VM_SHOW_TABLES +#undef IDLE_TRACE +/* Temporary flags/tests. All to be removed/undefined. END */ + +#define __KERNEL_SYSCALLS__ +#include <stdarg.h> + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/rwsem.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/ptrace.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/user.h> +#include <linux/a.out.h> +#include <linux/interrupt.h> +#include <linux/unistd.h> +#include <linux/delay.h> +#include <linux/reboot.h> +#include <linux/init.h> + +#include <asm/uaccess.h> +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/processor.h> /* includes also <asm/registers.h> */ +#include <asm/mmu_context.h> +#include <asm/elf.h> +#include <asm/page.h> + +#include <linux/irq.h> + +struct task_struct *last_task_used_math = NULL; + +#ifdef IDLE_TRACE +#ifdef VM_SHOW_TABLES +/* For testing */ +static void print_PTE(long base) +{ + int i, skip=0; + long long x, y, *p = (long long *) base; + + for (i=0; i< 512; i++, p++){ + if (*p == 0) { + if (!skip) { + skip++; + printk("(0s) "); + } + } else { + skip=0; + x = (*p) >> 32; + y = (*p) & 0xffffffff; + printk("%08Lx%08Lx ", x, y); + if (!((i+1)&0x3)) printk("\n"); + } + } +} + +/* For testing */ +static void print_DIR(long base) +{ + int i, skip=0; + long *p = (long *) base; + + for (i=0; i< 512; i++, p++){ + if (*p == 0) { + if (!skip) { + skip++; + printk("(0s) "); + } + } else { + skip=0; + printk("%08lx ", *p); + if (!((i+1)&0x7)) printk("\n"); + } + } +} + +/* For testing */ +static void print_vmalloc_first_tables(void) +{ + +#define PRESENT 0x800 /* Bit 11 */ + + /* + * Do it really dirty by looking at raw addresses, + * raw offsets, no types. If we used pgtable/pgalloc + * macros/definitions we could hide potential bugs. + * + * Note that pointers are 32-bit for CDC. + */ + long pgdt, pmdt, ptet; + + pgdt = (long) &swapper_pg_dir; + printk("-->PGD (0x%08lx):\n", pgdt); + print_DIR(pgdt); + printk("\n"); + + /* VMALLOC pool is mapped at 0xc0000000, second (pointer) entry in PGD */ + pgdt += 4; + pmdt = (long) (* (long *) pgdt); + if (!(pmdt & PRESENT)) { + printk("No PMD\n"); + return; + } else pmdt &= 0xfffff000; + + printk("-->PMD (0x%08lx):\n", pmdt); + print_DIR(pmdt); + printk("\n"); + + /* Get the pmdt displacement for 0xc0000000 */ + pmdt += 2048; + + /* just look at first two address ranges ... */ + /* ... 0xc0000000 ... */ + ptet = (long) (* (long *) pmdt); + if (!(ptet & PRESENT)) { + printk("No PTE0\n"); + return; + } else ptet &= 0xfffff000; + + printk("-->PTE0 (0x%08lx):\n", ptet); + print_PTE(ptet); + printk("\n"); + + /* ... 0xc0001000 ... */ + ptet += 4; + if (!(ptet & PRESENT)) { + printk("No PTE1\n"); + return; + } else ptet &= 0xfffff000; + printk("-->PTE1 (0x%08lx):\n", ptet); + print_PTE(ptet); + printk("\n"); +} +#else +#define print_vmalloc_first_tables() +#endif /* VM_SHOW_TABLES */ + +static void test_VM(void) +{ + void *a, *b, *c; + +#ifdef VM_SHOW_TABLES + printk("Initial PGD/PMD/PTE\n"); +#endif + print_vmalloc_first_tables(); + + printk("Allocating 2 bytes\n"); + a = vmalloc(2); + print_vmalloc_first_tables(); + + printk("Allocating 4100 bytes\n"); + b = vmalloc(4100); + print_vmalloc_first_tables(); + + printk("Allocating 20234 bytes\n"); + c = vmalloc(20234); + print_vmalloc_first_tables(); + +#ifdef VM_TEST_FAULT + /* Here you may want to fault ! */ + +#ifdef VM_TEST_RTLBMISS + printk("Ready to fault upon read.\n"); + if (* (char *) a) { + printk("RTLBMISSed on area a !\n"); + } + printk("RTLBMISSed on area a !\n"); +#endif + +#ifdef VM_TEST_WTLBMISS + printk("Ready to fault upon write.\n"); + *((char *) b) = 'L'; + printk("WTLBMISSed on area b !\n"); +#endif + +#endif /* VM_TEST_FAULT */ + + printk("Deallocating the 4100 byte chunk\n"); + vfree(b); + print_vmalloc_first_tables(); + + printk("Deallocating the 2 byte chunk\n"); + vfree(a); + print_vmalloc_first_tables(); + + printk("Deallocating the last chunk\n"); + vfree(c); + print_vmalloc_first_tables(); +} + +extern unsigned long volatile jiffies; +int once = 0; +unsigned long old_jiffies; +int pid = -1, pgid = -1; + +void idle_trace(void) +{ + + _syscall0(int, getpid) + _syscall1(int, getpgid, int, pid) + + if (!once) { + /* VM allocation/deallocation simple test */ + test_VM(); + pid = getpid(); + + printk("Got all through to Idle !!\n"); + printk("I'm now going to loop forever ...\n"); + printk("Any ! below is a timer tick.\n"); + printk("Any . below is a getpgid system call from pid = %d.\n", pid); + + + old_jiffies = jiffies; + once++; + } + + if (old_jiffies != jiffies) { + old_jiffies = jiffies - old_jiffies; + switch (old_jiffies) { + case 1: + printk("!"); + break; + case 2: + printk("!!"); + break; + case 3: + printk("!!!"); + break; + case 4: + printk("!!!!"); + break; + default: + printk("(%d!)", (int) old_jiffies); + } + old_jiffies = jiffies; + } + pgid = getpgid(pid); + printk("."); +} +#else +#define idle_trace() do { } while (0) +#endif /* IDLE_TRACE */ + +static int hlt_counter = 1; + +#define HARD_IDLE_TIMEOUT (HZ / 3) + +void disable_hlt(void) +{ + hlt_counter++; +} + +void enable_hlt(void) +{ + hlt_counter--; +} + +static int __init nohlt_setup(char *__unused) +{ + hlt_counter = 1; + return 1; +} + +static int __init hlt_setup(char *__unused) +{ + hlt_counter = 0; + return 1; +} + +__setup("nohlt", nohlt_setup); +__setup("hlt", hlt_setup); + +static inline void hlt(void) +{ + if (hlt_counter) + return; + + __asm__ __volatile__ ("sleep" : : : "memory"); +} + +/* + * The idle loop on a uniprocessor SH.. + */ +void default_idle(void) +{ + /* endless idle loop with no priority at all */ + while (1) { + if (hlt_counter) { + while (1) + if (need_resched()) + break; + } else { + local_irq_disable(); + while (!need_resched()) { + local_irq_enable(); + idle_trace(); + hlt(); + local_irq_disable(); + } + local_irq_enable(); + } + schedule(); + } +} + +void cpu_idle(void) +{ + default_idle(); +} + +void machine_restart(char * __unused) +{ + extern void phys_stext(void); + + phys_stext(); +} + +void machine_halt(void) +{ + for (;;); +} + +void machine_power_off(void) +{ + extern void enter_deep_standby(void); + + enter_deep_standby(); +} + +void show_regs(struct pt_regs * regs) +{ + unsigned long long ah, al, bh, bl, ch, cl; + + printk("\n"); + + ah = (regs->pc) >> 32; + al = (regs->pc) & 0xffffffff; + bh = (regs->regs[18]) >> 32; + bl = (regs->regs[18]) & 0xffffffff; + ch = (regs->regs[15]) >> 32; + cl = (regs->regs[15]) & 0xffffffff; + printk("PC : %08Lx%08Lx LINK: %08Lx%08Lx SP : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->sr) >> 32; + al = (regs->sr) & 0xffffffff; + asm volatile ("getcon " __TEA ", %0" : "=r" (bh)); + asm volatile ("getcon " __TEA ", %0" : "=r" (bl)); + bh = (bh) >> 32; + bl = (bl) & 0xffffffff; + asm volatile ("getcon " __KCR0 ", %0" : "=r" (ch)); + asm volatile ("getcon " __KCR0 ", %0" : "=r" (cl)); + ch = (ch) >> 32; + cl = (cl) & 0xffffffff; + printk("SR : %08Lx%08Lx TEA : %08Lx%08Lx KCR0: %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[0]) >> 32; + al = (regs->regs[0]) & 0xffffffff; + bh = (regs->regs[1]) >> 32; + bl = (regs->regs[1]) & 0xffffffff; + ch = (regs->regs[2]) >> 32; + cl = (regs->regs[2]) & 0xffffffff; + printk("R0 : %08Lx%08Lx R1 : %08Lx%08Lx R2 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[3]) >> 32; + al = (regs->regs[3]) & 0xffffffff; + bh = (regs->regs[4]) >> 32; + bl = (regs->regs[4]) & 0xffffffff; + ch = (regs->regs[5]) >> 32; + cl = (regs->regs[5]) & 0xffffffff; + printk("R3 : %08Lx%08Lx R4 : %08Lx%08Lx R5 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[6]) >> 32; + al = (regs->regs[6]) & 0xffffffff; + bh = (regs->regs[7]) >> 32; + bl = (regs->regs[7]) & 0xffffffff; + ch = (regs->regs[8]) >> 32; + cl = (regs->regs[8]) & 0xffffffff; + printk("R6 : %08Lx%08Lx R7 : %08Lx%08Lx R8 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[9]) >> 32; + al = (regs->regs[9]) & 0xffffffff; + bh = (regs->regs[10]) >> 32; + bl = (regs->regs[10]) & 0xffffffff; + ch = (regs->regs[11]) >> 32; + cl = (regs->regs[11]) & 0xffffffff; + printk("R9 : %08Lx%08Lx R10 : %08Lx%08Lx R11 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[12]) >> 32; + al = (regs->regs[12]) & 0xffffffff; + bh = (regs->regs[13]) >> 32; + bl = (regs->regs[13]) & 0xffffffff; + ch = (regs->regs[14]) >> 32; + cl = (regs->regs[14]) & 0xffffffff; + printk("R12 : %08Lx%08Lx R13 : %08Lx%08Lx R14 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[16]) >> 32; + al = (regs->regs[16]) & 0xffffffff; + bh = (regs->regs[17]) >> 32; + bl = (regs->regs[17]) & 0xffffffff; + ch = (regs->regs[19]) >> 32; + cl = (regs->regs[19]) & 0xffffffff; + printk("R16 : %08Lx%08Lx R17 : %08Lx%08Lx R19 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[20]) >> 32; + al = (regs->regs[20]) & 0xffffffff; + bh = (regs->regs[21]) >> 32; + bl = (regs->regs[21]) & 0xffffffff; + ch = (regs->regs[22]) >> 32; + cl = (regs->regs[22]) & 0xffffffff; + printk("R20 : %08Lx%08Lx R21 : %08Lx%08Lx R22 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[23]) >> 32; + al = (regs->regs[23]) & 0xffffffff; + bh = (regs->regs[24]) >> 32; + bl = (regs->regs[24]) & 0xffffffff; + ch = (regs->regs[25]) >> 32; + cl = (regs->regs[25]) & 0xffffffff; + printk("R23 : %08Lx%08Lx R24 : %08Lx%08Lx R25 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[26]) >> 32; + al = (regs->regs[26]) & 0xffffffff; + bh = (regs->regs[27]) >> 32; + bl = (regs->regs[27]) & 0xffffffff; + ch = (regs->regs[28]) >> 32; + cl = (regs->regs[28]) & 0xffffffff; + printk("R26 : %08Lx%08Lx R27 : %08Lx%08Lx R28 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[29]) >> 32; + al = (regs->regs[29]) & 0xffffffff; + bh = (regs->regs[30]) >> 32; + bl = (regs->regs[30]) & 0xffffffff; + ch = (regs->regs[31]) >> 32; + cl = (regs->regs[31]) & 0xffffffff; + printk("R29 : %08Lx%08Lx R30 : %08Lx%08Lx R31 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[32]) >> 32; + al = (regs->regs[32]) & 0xffffffff; + bh = (regs->regs[33]) >> 32; + bl = (regs->regs[33]) & 0xffffffff; + ch = (regs->regs[34]) >> 32; + cl = (regs->regs[34]) & 0xffffffff; + printk("R32 : %08Lx%08Lx R33 : %08Lx%08Lx R34 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[35]) >> 32; + al = (regs->regs[35]) & 0xffffffff; + bh = (regs->regs[36]) >> 32; + bl = (regs->regs[36]) & 0xffffffff; + ch = (regs->regs[37]) >> 32; + cl = (regs->regs[37]) & 0xffffffff; + printk("R35 : %08Lx%08Lx R36 : %08Lx%08Lx R37 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[38]) >> 32; + al = (regs->regs[38]) & 0xffffffff; + bh = (regs->regs[39]) >> 32; + bl = (regs->regs[39]) & 0xffffffff; + ch = (regs->regs[40]) >> 32; + cl = (regs->regs[40]) & 0xffffffff; + printk("R38 : %08Lx%08Lx R39 : %08Lx%08Lx R40 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[41]) >> 32; + al = (regs->regs[41]) & 0xffffffff; + bh = (regs->regs[42]) >> 32; + bl = (regs->regs[42]) & 0xffffffff; + ch = (regs->regs[43]) >> 32; + cl = (regs->regs[43]) & 0xffffffff; + printk("R41 : %08Lx%08Lx R42 : %08Lx%08Lx R43 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[44]) >> 32; + al = (regs->regs[44]) & 0xffffffff; + bh = (regs->regs[45]) >> 32; + bl = (regs->regs[45]) & 0xffffffff; + ch = (regs->regs[46]) >> 32; + cl = (regs->regs[46]) & 0xffffffff; + printk("R44 : %08Lx%08Lx R45 : %08Lx%08Lx R46 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[47]) >> 32; + al = (regs->regs[47]) & 0xffffffff; + bh = (regs->regs[48]) >> 32; + bl = (regs->regs[48]) & 0xffffffff; + ch = (regs->regs[49]) >> 32; + cl = (regs->regs[49]) & 0xffffffff; + printk("R47 : %08Lx%08Lx R48 : %08Lx%08Lx R49 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[50]) >> 32; + al = (regs->regs[50]) & 0xffffffff; + bh = (regs->regs[51]) >> 32; + bl = (regs->regs[51]) & 0xffffffff; + ch = (regs->regs[52]) >> 32; + cl = (regs->regs[52]) & 0xffffffff; + printk("R50 : %08Lx%08Lx R51 : %08Lx%08Lx R52 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[53]) >> 32; + al = (regs->regs[53]) & 0xffffffff; + bh = (regs->regs[54]) >> 32; + bl = (regs->regs[54]) & 0xffffffff; + ch = (regs->regs[55]) >> 32; + cl = (regs->regs[55]) & 0xffffffff; + printk("R53 : %08Lx%08Lx R54 : %08Lx%08Lx R55 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[56]) >> 32; + al = (regs->regs[56]) & 0xffffffff; + bh = (regs->regs[57]) >> 32; + bl = (regs->regs[57]) & 0xffffffff; + ch = (regs->regs[58]) >> 32; + cl = (regs->regs[58]) & 0xffffffff; + printk("R56 : %08Lx%08Lx R57 : %08Lx%08Lx R58 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[59]) >> 32; + al = (regs->regs[59]) & 0xffffffff; + bh = (regs->regs[60]) >> 32; + bl = (regs->regs[60]) & 0xffffffff; + ch = (regs->regs[61]) >> 32; + cl = (regs->regs[61]) & 0xffffffff; + printk("R59 : %08Lx%08Lx R60 : %08Lx%08Lx R61 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[62]) >> 32; + al = (regs->regs[62]) & 0xffffffff; + bh = (regs->tregs[0]) >> 32; + bl = (regs->tregs[0]) & 0xffffffff; + ch = (regs->tregs[1]) >> 32; + cl = (regs->tregs[1]) & 0xffffffff; + printk("R62 : %08Lx%08Lx T0 : %08Lx%08Lx T1 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->tregs[2]) >> 32; + al = (regs->tregs[2]) & 0xffffffff; + bh = (regs->tregs[3]) >> 32; + bl = (regs->tregs[3]) & 0xffffffff; + ch = (regs->tregs[4]) >> 32; + cl = (regs->tregs[4]) & 0xffffffff; + printk("T2 : %08Lx%08Lx T3 : %08Lx%08Lx T4 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->tregs[5]) >> 32; + al = (regs->tregs[5]) & 0xffffffff; + bh = (regs->tregs[6]) >> 32; + bl = (regs->tregs[6]) & 0xffffffff; + ch = (regs->tregs[7]) >> 32; + cl = (regs->tregs[7]) & 0xffffffff; + printk("T5 : %08Lx%08Lx T6 : %08Lx%08Lx T7 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + /* + * If we're in kernel mode, dump the stack too.. + */ + if (!user_mode(regs)) { + void show_stack(struct task_struct *tsk, unsigned long *sp); + unsigned long sp = regs->regs[15] & 0xffffffff; + struct task_struct *tsk = get_current(); + + tsk->thread.kregs = regs; + + show_stack(tsk, (unsigned long *)sp); + } +} + +struct task_struct * alloc_task_struct(void) +{ + /* Get task descriptor pages */ + return (struct task_struct *) + __get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)); +} + +void free_task_struct(struct task_struct *p) +{ + free_pages((unsigned long) p, get_order(THREAD_SIZE)); +} + +/* + * Create a kernel thread + */ + +/* + * This is the mechanism for creating a new kernel thread. + * + * NOTE! Only a kernel-only process(ie the swapper or direct descendants + * who haven't done an "execve()") should use this: it will work within + * a system call from a "real" process, but the process memory space will + * not be free'd until both the parent and the child have exited. + */ +int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) +{ + /* A bit less processor dependent than older sh ... */ + unsigned int reply; + +static __inline__ _syscall2(int,clone,unsigned long,flags,unsigned long,newsp) +static __inline__ _syscall1(int,exit,int,ret) + + reply = clone(flags | CLONE_VM, 0); + if (!reply) { + /* Child */ + reply = exit(fn(arg)); + } + + return reply; +} + +/* + * Free current thread data structures etc.. + */ +void exit_thread(void) +{ + /* See arch/sparc/kernel/process.c for the precedent for doing this -- RPC. + + The SH-5 FPU save/restore approach relies on last_task_used_math + pointing to a live task_struct. When another task tries to use the + FPU for the 1st time, the FPUDIS trap handling (see + arch/sh64/kernel/fpu.c) will save the existing FPU state to the + FP regs field within last_task_used_math before re-loading the new + task's FPU state (or initialising it if the FPU has been used + before). So if last_task_used_math is stale, and its page has already been + re-allocated for another use, the consequences are rather grim. Unless we + null it here, there is no other path through which it would get safely + nulled. */ + +#ifdef CONFIG_SH_FPU + if (last_task_used_math == current) { + last_task_used_math = NULL; + } +#endif +} + +void flush_thread(void) +{ + + /* Called by fs/exec.c (flush_old_exec) to remove traces of a + * previously running executable. */ +#ifdef CONFIG_SH_FPU + if (last_task_used_math == current) { + last_task_used_math = NULL; + } + /* Force FPU state to be reinitialised after exec */ + clear_used_math(); +#endif + + /* if we are a kernel thread, about to change to user thread, + * update kreg + */ + if(current->thread.kregs==&fake_swapper_regs) { + current->thread.kregs = + ((struct pt_regs *)(THREAD_SIZE + (unsigned long) current) - 1); + current->thread.uregs = current->thread.kregs; + } +} + +void release_thread(struct task_struct *dead_task) +{ + /* do nothing */ +} + +/* Fill in the fpu structure for a core dump.. */ +int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) +{ +#ifdef CONFIG_SH_FPU + int fpvalid; + struct task_struct *tsk = current; + + fpvalid = !!tsk_used_math(tsk); + if (fpvalid) { + if (current == last_task_used_math) { + grab_fpu(); + fpsave(&tsk->thread.fpu.hard); + release_fpu(); + last_task_used_math = 0; + regs->sr |= SR_FD; + } + + memcpy(fpu, &tsk->thread.fpu.hard, sizeof(*fpu)); + } + + return fpvalid; +#else + return 0; /* Task didn't use the fpu at all. */ +#endif +} + +asmlinkage void ret_from_fork(void); + +int copy_thread(int nr, unsigned long clone_flags, unsigned long usp, + unsigned long unused, + struct task_struct *p, struct pt_regs *regs) +{ + struct pt_regs *childregs; + unsigned long long se; /* Sign extension */ + +#ifdef CONFIG_SH_FPU + if(last_task_used_math == current) { + grab_fpu(); + fpsave(¤t->thread.fpu.hard); + release_fpu(); + last_task_used_math = NULL; + regs->sr |= SR_FD; + } +#endif + /* Copy from sh version */ + childregs = ((struct pt_regs *)(THREAD_SIZE + (unsigned long) p->thread_info )) - 1; + + *childregs = *regs; + + if (user_mode(regs)) { + childregs->regs[15] = usp; + p->thread.uregs = childregs; + } else { + childregs->regs[15] = (unsigned long)p->thread_info + THREAD_SIZE; + } + + childregs->regs[9] = 0; /* Set return value for child */ + childregs->sr |= SR_FD; /* Invalidate FPU flag */ + + p->thread.sp = (unsigned long) childregs; + p->thread.pc = (unsigned long) ret_from_fork; + + /* + * Sign extend the edited stack. + * Note that thread.pc and thread.pc will stay + * 32-bit wide and context switch must take care + * of NEFF sign extension. + */ + + se = childregs->regs[15]; + se = (se & NEFF_SIGN) ? (se | NEFF_MASK) : se; + childregs->regs[15] = se; + + return 0; +} + +/* + * fill in the user structure for a core dump.. + */ +void dump_thread(struct pt_regs * regs, struct user * dump) +{ + dump->magic = CMAGIC; + dump->start_code = current->mm->start_code; + dump->start_data = current->mm->start_data; + dump->start_stack = regs->regs[15] & ~(PAGE_SIZE - 1); + dump->u_tsize = (current->mm->end_code - dump->start_code) >> PAGE_SHIFT; + dump->u_dsize = (current->mm->brk + (PAGE_SIZE-1) - dump->start_data) >> PAGE_SHIFT; + dump->u_ssize = (current->mm->start_stack - dump->start_stack + + PAGE_SIZE - 1) >> PAGE_SHIFT; + /* Debug registers will come here. */ + + dump->regs = *regs; + + dump->u_fpvalid = dump_fpu(regs, &dump->fpu); +} + +asmlinkage int sys_fork(unsigned long r2, unsigned long r3, + unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs *pregs) +{ + return do_fork(SIGCHLD, pregs->regs[15], pregs, 0, 0, 0); +} + +asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, + unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs *pregs) +{ + if (!newsp) + newsp = pregs->regs[15]; + return do_fork(clone_flags, newsp, pregs, 0, 0, 0); +} + +/* + * This is trivial, and on the face of it looks like it + * could equally well be done in user mode. + * + * Not so, for quite unobvious reasons - register pressure. + * In user mode vfork() cannot have a stack frame, and if + * done by calling the "clone()" system call directly, you + * do not have enough call-clobbered registers to hold all + * the information you need. + */ +asmlinkage int sys_vfork(unsigned long r2, unsigned long r3, + unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs *pregs) +{ + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, pregs->regs[15], pregs, 0, 0, 0); +} + +/* + * sys_execve() executes a new program. + */ +asmlinkage int sys_execve(char *ufilename, char **uargv, + char **uenvp, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs *pregs) +{ + int error; + char *filename; + + lock_kernel(); + filename = getname((char __user *)ufilename); + error = PTR_ERR(filename); + if (IS_ERR(filename)) + goto out; + + error = do_execve(filename, + (char __user * __user *)uargv, + (char __user * __user *)uenvp, + pregs); + if (error == 0) { + task_lock(current); + current->ptrace &= ~PT_DTRACE; + task_unlock(current); + } + putname(filename); +out: + unlock_kernel(); + return error; +} + +/* + * These bracket the sleeping functions.. + */ +extern void interruptible_sleep_on(wait_queue_head_t *q); + +#define mid_sched ((unsigned long) interruptible_sleep_on) + +static int in_sh64_switch_to(unsigned long pc) +{ + extern char __sh64_switch_to_end; + /* For a sleeping task, the PC is somewhere in the middle of the function, + so we don't have to worry about masking the LSB off */ + return (pc >= (unsigned long) sh64_switch_to) && + (pc < (unsigned long) &__sh64_switch_to_end); +} + +unsigned long get_wchan(struct task_struct *p) +{ + unsigned long schedule_fp; + unsigned long sh64_switch_to_fp; + unsigned long schedule_caller_pc; + unsigned long pc; + + if (!p || p == current || p->state == TASK_RUNNING) + return 0; + + /* + * The same comment as on the Alpha applies here, too ... + */ + pc = thread_saved_pc(p); + +#ifdef CONFIG_FRAME_POINTER + if (in_sh64_switch_to(pc)) { + sh64_switch_to_fp = (long) p->thread.sp; + /* r14 is saved at offset 4 in the sh64_switch_to frame */ + schedule_fp = *(unsigned long *) (long)(sh64_switch_to_fp + 4); + + /* and the caller of 'schedule' is (currently!) saved at offset 24 + in the frame of schedule (from disasm) */ + schedule_caller_pc = *(unsigned long *) (long)(schedule_fp + 24); + return schedule_caller_pc; + } +#endif + return pc; +} + +/* Provide a /proc/asids file that lists out the + ASIDs currently associated with the processes. (If the DM.PC register is + examined through the debug link, this shows ASID + PC. To make use of this, + the PID->ASID relationship needs to be known. This is primarily for + debugging.) + */ + +#if defined(CONFIG_SH64_PROC_ASIDS) +#include <linux/init.h> +#include <linux/proc_fs.h> + +static int +asids_proc_info(char *buf, char **start, off_t fpos, int length, int *eof, void *data) +{ + int len=0; + struct task_struct *p; + read_lock(&tasklist_lock); + for_each_process(p) { + int pid = p->pid; + struct mm_struct *mm; + if (!pid) continue; + mm = p->mm; + if (mm) { + unsigned long asid, context; + context = mm->context; + asid = (context & 0xff); + len += sprintf(buf+len, "%5d : %02lx\n", pid, asid); + } else { + len += sprintf(buf+len, "%5d : (none)\n", pid); + } + } + read_unlock(&tasklist_lock); + *eof = 1; + return len; +} + +static int __init register_proc_asids(void) +{ + create_proc_read_entry("asids", 0, NULL, asids_proc_info, NULL); + return 0; +} + +__initcall(register_proc_asids); +#endif + diff --git a/arch/sh64/kernel/ptrace.c b/arch/sh64/kernel/ptrace.c new file mode 100644 index 0000000..800288c --- /dev/null +++ b/arch/sh64/kernel/ptrace.c @@ -0,0 +1,376 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/ptrace.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003 Paul Mundt + * + * Started from SH3/4 version: + * SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka + * + * Original x86 implementation: + * By Ross Biro 1/23/92 + * edited by Linus Torvalds + * + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/errno.h> +#include <linux/ptrace.h> +#include <linux/user.h> + +#include <asm/io.h> +#include <asm/uaccess.h> +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/processor.h> +#include <asm/mmu_context.h> + +/* This mask defines the bits of the SR which the user is not allowed to + change, which are everything except S, Q, M, PR, SZ, FR. */ +#define SR_MASK (0xffff8cfd) + +/* + * does not yet catch signals sent when the child dies. + * in exit.c or in signal.c. + */ + +/* + * This routine will get a word from the user area in the process kernel stack. + */ +static inline int get_stack_long(struct task_struct *task, int offset) +{ + unsigned char *stack; + + stack = (unsigned char *)(task->thread.uregs); + stack += offset; + return (*((int *)stack)); +} + +static inline unsigned long +get_fpu_long(struct task_struct *task, unsigned long addr) +{ + unsigned long tmp; + struct pt_regs *regs; + regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1; + + if (!tsk_used_math(task)) { + if (addr == offsetof(struct user_fpu_struct, fpscr)) { + tmp = FPSCR_INIT; + } else { + tmp = 0xffffffffUL; /* matches initial value in fpu.c */ + } + return tmp; + } + + if (last_task_used_math == task) { + grab_fpu(); + fpsave(&task->thread.fpu.hard); + release_fpu(); + last_task_used_math = 0; + regs->sr |= SR_FD; + } + + tmp = ((long *)&task->thread.fpu)[addr / sizeof(unsigned long)]; + return tmp; +} + +/* + * This routine will put a word into the user area in the process kernel stack. + */ +static inline int put_stack_long(struct task_struct *task, int offset, + unsigned long data) +{ + unsigned char *stack; + + stack = (unsigned char *)(task->thread.uregs); + stack += offset; + *(unsigned long *) stack = data; + return 0; +} + +static inline int +put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data) +{ + struct pt_regs *regs; + + regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1; + + if (!tsk_used_math(task)) { + fpinit(&task->thread.fpu.hard); + set_stopped_child_used_math(task); + } else if (last_task_used_math == task) { + grab_fpu(); + fpsave(&task->thread.fpu.hard); + release_fpu(); + last_task_used_math = 0; + regs->sr |= SR_FD; + } + + ((long *)&task->thread.fpu)[addr / sizeof(unsigned long)] = data; + return 0; +} + +asmlinkage int sys_ptrace(long request, long pid, long addr, long data) +{ + struct task_struct *child; + extern void poke_real_address_q(unsigned long long addr, unsigned long long data); +#define WPC_DBRMODE 0x0d104008 + static int first_call = 1; + int ret; + + lock_kernel(); + + if (first_call) { + /* Set WPC.DBRMODE to 0. This makes all debug events get + * delivered through RESVEC, i.e. into the handlers in entry.S. + * (If the kernel was downloaded using a remote gdb, WPC.DBRMODE + * would normally be left set to 1, which makes debug events get + * delivered through DBRVEC, i.e. into the remote gdb's + * handlers. This prevents ptrace getting them, and confuses + * the remote gdb.) */ + printk("DBRMODE set to 0 to permit native debugging\n"); + poke_real_address_q(WPC_DBRMODE, 0); + first_call = 0; + } + + ret = -EPERM; + if (request == PTRACE_TRACEME) { + /* are we already being traced? */ + if (current->ptrace & PT_PTRACED) + goto out; + /* set the ptrace bit in the process flags. */ + current->ptrace |= PT_PTRACED; + ret = 0; + goto out; + } + ret = -ESRCH; + read_lock(&tasklist_lock); + child = find_task_by_pid(pid); + if (child) + get_task_struct(child); + read_unlock(&tasklist_lock); + if (!child) + goto out; + + ret = -EPERM; + if (pid == 1) /* you may not mess with init */ + goto out_tsk; + + if (request == PTRACE_ATTACH) { + ret = ptrace_attach(child); + goto out_tsk; + } + + ret = ptrace_check_attach(child, request == PTRACE_KILL); + if (ret < 0) + goto out_tsk; + + switch (request) { + /* when I and D space are separate, these will need to be fixed. */ + case PTRACE_PEEKTEXT: /* read word at location addr. */ + case PTRACE_PEEKDATA: { + unsigned long tmp; + int copied; + + copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0); + ret = -EIO; + if (copied != sizeof(tmp)) + break; + ret = put_user(tmp,(unsigned long *) data); + break; + } + + /* read the word at location addr in the USER area. */ + case PTRACE_PEEKUSR: { + unsigned long tmp; + + ret = -EIO; + if ((addr & 3) || addr < 0) + break; + + if (addr < sizeof(struct pt_regs)) + tmp = get_stack_long(child, addr); + else if ((addr >= offsetof(struct user, fpu)) && + (addr < offsetof(struct user, u_fpvalid))) { + tmp = get_fpu_long(child, addr - offsetof(struct user, fpu)); + } else if (addr == offsetof(struct user, u_fpvalid)) { + tmp = !!tsk_used_math(child); + } else { + break; + } + ret = put_user(tmp, (unsigned long *)data); + break; + } + + /* when I and D space are separate, this will have to be fixed. */ + case PTRACE_POKETEXT: /* write the word at location addr. */ + case PTRACE_POKEDATA: + ret = 0; + if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data)) + break; + ret = -EIO; + break; + + case PTRACE_POKEUSR: + /* write the word at location addr in the USER area. We must + disallow any changes to certain SR bits or u_fpvalid, since + this could crash the kernel or result in a security + loophole. */ + ret = -EIO; + if ((addr & 3) || addr < 0) + break; + + if (addr < sizeof(struct pt_regs)) { + /* Ignore change of top 32 bits of SR */ + if (addr == offsetof (struct pt_regs, sr)+4) + { + ret = 0; + break; + } + /* If lower 32 bits of SR, ignore non-user bits */ + if (addr == offsetof (struct pt_regs, sr)) + { + long cursr = get_stack_long(child, addr); + data &= ~(SR_MASK); + data |= (cursr & SR_MASK); + } + ret = put_stack_long(child, addr, data); + } + else if ((addr >= offsetof(struct user, fpu)) && + (addr < offsetof(struct user, u_fpvalid))) { + ret = put_fpu_long(child, addr - offsetof(struct user, fpu), data); + } + break; + + case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ + case PTRACE_CONT: { /* restart after signal. */ + ret = -EIO; + if ((unsigned long) data > _NSIG) + break; + if (request == PTRACE_SYSCALL) + set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); + else + clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); + child->exit_code = data; + wake_up_process(child); + ret = 0; + break; + } + +/* + * make the child exit. Best I can do is send it a sigkill. + * perhaps it should be put in the status that it wants to + * exit. + */ + case PTRACE_KILL: { + ret = 0; + if (child->exit_state == EXIT_ZOMBIE) /* already dead */ + break; + child->exit_code = SIGKILL; + wake_up_process(child); + break; + } + + case PTRACE_SINGLESTEP: { /* set the trap flag. */ + struct pt_regs *regs; + + ret = -EIO; + if ((unsigned long) data > _NSIG) + break; + clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); + if ((child->ptrace & PT_DTRACE) == 0) { + /* Spurious delayed TF traps may occur */ + child->ptrace |= PT_DTRACE; + } + + regs = child->thread.uregs; + + regs->sr |= SR_SSTEP; /* auto-resetting upon exception */ + + child->exit_code = data; + /* give it a chance to run. */ + wake_up_process(child); + ret = 0; + break; + } + + case PTRACE_DETACH: /* detach a process that was attached. */ + ret = ptrace_detach(child, data); + break; + + default: + ret = ptrace_request(child, request, addr, data); + break; + } +out_tsk: + put_task_struct(child); +out: + unlock_kernel(); + return ret; +} + +asmlinkage void syscall_trace(void) +{ + struct task_struct *tsk = current; + + if (!test_thread_flag(TIF_SYSCALL_TRACE)) + return; + if (!(tsk->ptrace & PT_PTRACED)) + return; + + ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) + ? 0x80 : 0)); + /* + * this isn't the same as continuing with a signal, but it will do + * for normal use. strace only continues with a signal if the + * stopping signal is not SIGTRAP. -brl + */ + if (tsk->exit_code) { + send_sig(tsk->exit_code, tsk, 1); + tsk->exit_code = 0; + } +} + +/* Called with interrupts disabled */ +asmlinkage void do_single_step(unsigned long long vec, struct pt_regs *regs) +{ + /* This is called after a single step exception (DEBUGSS). + There is no need to change the PC, as it is a post-execution + exception, as entry.S does not do anything to the PC for DEBUGSS. + We need to clear the Single Step setting in SR to avoid + continually stepping. */ + local_irq_enable(); + regs->sr &= ~SR_SSTEP; + force_sig(SIGTRAP, current); +} + +/* Called with interrupts disabled */ +asmlinkage void do_software_break_point(unsigned long long vec, + struct pt_regs *regs) +{ + /* We need to forward step the PC, to counteract the backstep done + in signal.c. */ + local_irq_enable(); + force_sig(SIGTRAP, current); + regs->pc += 4; +} + +/* + * Called by kernel/ptrace.c when detaching.. + * + * Make sure single step bits etc are not set. + */ +void ptrace_disable(struct task_struct *child) +{ + /* nothing to do.. */ +} diff --git a/arch/sh64/kernel/semaphore.c b/arch/sh64/kernel/semaphore.c new file mode 100644 index 0000000..72c1653 --- /dev/null +++ b/arch/sh64/kernel/semaphore.c @@ -0,0 +1,140 @@ +/* + * Just taken from alpha implementation. + * This can't work well, perhaps. + */ +/* + * Generic semaphore code. Buyer beware. Do your own + * specific changes in <asm/semaphore-helper.h> + */ + +#include <linux/errno.h> +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/wait.h> +#include <linux/init.h> +#include <asm/semaphore.h> +#include <asm/semaphore-helper.h> + +spinlock_t semaphore_wake_lock; + +/* + * Semaphores are implemented using a two-way counter: + * The "count" variable is decremented for each process + * that tries to sleep, while the "waking" variable is + * incremented when the "up()" code goes to wake up waiting + * processes. + * + * Notably, the inline "up()" and "down()" functions can + * efficiently test if they need to do any extra work (up + * needs to do something only if count was negative before + * the increment operation. + * + * waking_non_zero() (from asm/semaphore.h) must execute + * atomically. + * + * When __up() is called, the count was negative before + * incrementing it, and we need to wake up somebody. + * + * This routine adds one to the count of processes that need to + * wake up and exit. ALL waiting processes actually wake up but + * only the one that gets to the "waking" field first will gate + * through and acquire the semaphore. The others will go back + * to sleep. + * + * Note that these functions are only called when there is + * contention on the lock, and as such all this is the + * "non-critical" part of the whole semaphore business. The + * critical part is the inline stuff in <asm/semaphore.h> + * where we want to avoid any extra jumps and calls. + */ +void __up(struct semaphore *sem) +{ + wake_one_more(sem); + wake_up(&sem->wait); +} + +/* + * Perform the "down" function. Return zero for semaphore acquired, + * return negative for signalled out of the function. + * + * If called from __down, the return is ignored and the wait loop is + * not interruptible. This means that a task waiting on a semaphore + * using "down()" cannot be killed until someone does an "up()" on + * the semaphore. + * + * If called from __down_interruptible, the return value gets checked + * upon return. If the return value is negative then the task continues + * with the negative value in the return register (it can be tested by + * the caller). + * + * Either form may be used in conjunction with "up()". + * + */ + +#define DOWN_VAR \ + struct task_struct *tsk = current; \ + wait_queue_t wait; \ + init_waitqueue_entry(&wait, tsk); + +#define DOWN_HEAD(task_state) \ + \ + \ + tsk->state = (task_state); \ + add_wait_queue(&sem->wait, &wait); \ + \ + /* \ + * Ok, we're set up. sem->count is known to be less than zero \ + * so we must wait. \ + * \ + * We can let go the lock for purposes of waiting. \ + * We re-acquire it after awaking so as to protect \ + * all semaphore operations. \ + * \ + * If "up()" is called before we call waking_non_zero() then \ + * we will catch it right away. If it is called later then \ + * we will have to go through a wakeup cycle to catch it. \ + * \ + * Multiple waiters contend for the semaphore lock to see \ + * who gets to gate through and who has to wait some more. \ + */ \ + for (;;) { + +#define DOWN_TAIL(task_state) \ + tsk->state = (task_state); \ + } \ + tsk->state = TASK_RUNNING; \ + remove_wait_queue(&sem->wait, &wait); + +void __sched __down(struct semaphore * sem) +{ + DOWN_VAR + DOWN_HEAD(TASK_UNINTERRUPTIBLE) + if (waking_non_zero(sem)) + break; + schedule(); + DOWN_TAIL(TASK_UNINTERRUPTIBLE) +} + +int __sched __down_interruptible(struct semaphore * sem) +{ + int ret = 0; + DOWN_VAR + DOWN_HEAD(TASK_INTERRUPTIBLE) + + ret = waking_non_zero_interruptible(sem, tsk); + if (ret) + { + if (ret == 1) + /* ret != 0 only if we get interrupted -arca */ + ret = 0; + break; + } + schedule(); + DOWN_TAIL(TASK_INTERRUPTIBLE) + return ret; +} + +int __down_trylock(struct semaphore * sem) +{ + return waking_non_zero_trylock(sem); +} diff --git a/arch/sh64/kernel/setup.c b/arch/sh64/kernel/setup.c new file mode 100644 index 0000000..c7a7b816 --- /dev/null +++ b/arch/sh64/kernel/setup.c @@ -0,0 +1,385 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/setup.c + * + * sh64 Arch Support + * + * This file handles the architecture-dependent parts of initialization + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003, 2004 Paul Mundt + * + * benedict.gaster@superh.com: 2nd May 2002 + * Modified to use the empty_zero_page to pass command line arguments. + * + * benedict.gaster@superh.com: 3rd May 2002 + * Added support for ramdisk, removing statically linked romfs at the same time. + * + * lethal@linux-sh.org: 15th May 2003 + * Added generic procfs cpuinfo reporting. Make boards just export their name. + * + * lethal@linux-sh.org: 25th May 2003 + * Added generic get_cpu_subtype() for subtype reporting from cpu_data->type. + * + */ +#include <linux/errno.h> +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/stddef.h> +#include <linux/unistd.h> +#include <linux/ptrace.h> +#include <linux/slab.h> +#include <linux/user.h> +#include <linux/a.out.h> +#include <linux/tty.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/config.h> +#include <linux/init.h> +#include <linux/seq_file.h> +#include <linux/blkdev.h> +#include <linux/bootmem.h> +#include <linux/console.h> +#include <linux/root_dev.h> +#include <linux/cpu.h> +#include <linux/initrd.h> +#include <asm/processor.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/platform.h> +#include <asm/uaccess.h> +#include <asm/system.h> +#include <asm/io.h> +#include <asm/sections.h> +#include <asm/setup.h> +#include <asm/smp.h> + +#ifdef CONFIG_VT +#include <linux/console.h> +#endif + +struct screen_info screen_info; + +#ifdef CONFIG_BLK_DEV_RAM +extern int rd_doload; /* 1 = load ramdisk, 0 = don't load */ +extern int rd_prompt; /* 1 = prompt for ramdisk, 0 = don't prompt */ +extern int rd_image_start; /* starting block # of image */ +#endif + +extern int root_mountflags; +extern char *get_system_type(void); +extern void platform_setup(void); +extern void platform_monitor(void); +extern void platform_reserve(void); +extern int sh64_cache_init(void); +extern int sh64_tlb_init(void); + +#define RAMDISK_IMAGE_START_MASK 0x07FF +#define RAMDISK_PROMPT_FLAG 0x8000 +#define RAMDISK_LOAD_FLAG 0x4000 + +static char command_line[COMMAND_LINE_SIZE] = { 0, }; +unsigned long long memory_start = CONFIG_MEMORY_START; +unsigned long long memory_end = CONFIG_MEMORY_START + (CONFIG_MEMORY_SIZE_IN_MB * 1024 * 1024); + +struct sh_cpuinfo boot_cpu_data; + +static inline void parse_mem_cmdline (char ** cmdline_p) +{ + char c = ' ', *to = command_line, *from = COMMAND_LINE; + int len = 0; + + /* Save unparsed command line copy for /proc/cmdline */ + memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE); + saved_command_line[COMMAND_LINE_SIZE-1] = '\0'; + + for (;;) { + /* + * "mem=XXX[kKmM]" defines a size of memory. + */ + if (c == ' ' && !memcmp(from, "mem=", 4)) { + if (to != command_line) + to--; + { + unsigned long mem_size; + + mem_size = memparse(from+4, &from); + memory_end = memory_start + mem_size; + } + } + c = *(from++); + if (!c) + break; + if (COMMAND_LINE_SIZE <= ++len) + break; + *(to++) = c; + } + *to = '\0'; + + *cmdline_p = command_line; +} + +static void __init sh64_cpu_type_detect(void) +{ + extern unsigned long long peek_real_address_q(unsigned long long addr); + unsigned long long cir; + /* Do peeks in real mode to avoid having to set up a mapping for the + WPC registers. On SH5-101 cut2, such a mapping would be exposed to + an address translation erratum which would make it hard to set up + correctly. */ + cir = peek_real_address_q(0x0d000008); + + if ((cir & 0xffff) == 0x5103) { + boot_cpu_data.type = CPU_SH5_103; + } else if (((cir >> 32) & 0xffff) == 0x51e2) { + /* CPU.VCR aliased at CIR address on SH5-101 */ + boot_cpu_data.type = CPU_SH5_101; + } else { + boot_cpu_data.type = CPU_SH_NONE; + } +} + +void __init setup_arch(char **cmdline_p) +{ + unsigned long bootmap_size, i; + unsigned long first_pfn, start_pfn, last_pfn, pages; + +#ifdef CONFIG_EARLY_PRINTK + extern void enable_early_printk(void); + + /* + * Setup Early SCIF console + */ + enable_early_printk(); +#endif + + /* + * Setup TLB mappings + */ + sh64_tlb_init(); + + /* + * Caches are already initialized by the time we get here, so we just + * fill in cpu_data info for the caches. + */ + sh64_cache_init(); + + platform_setup(); + platform_monitor(); + + sh64_cpu_type_detect(); + + ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); + +#ifdef CONFIG_BLK_DEV_RAM + rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; + rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); + rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); +#endif + + if (!MOUNT_ROOT_RDONLY) + root_mountflags &= ~MS_RDONLY; + init_mm.start_code = (unsigned long) _text; + init_mm.end_code = (unsigned long) _etext; + init_mm.end_data = (unsigned long) _edata; + init_mm.brk = (unsigned long) _end; + + code_resource.start = __pa(_text); + code_resource.end = __pa(_etext)-1; + data_resource.start = __pa(_etext); + data_resource.end = __pa(_edata)-1; + + parse_mem_cmdline(cmdline_p); + + /* + * Find the lowest and highest page frame numbers we have available + */ + first_pfn = PFN_DOWN(memory_start); + last_pfn = PFN_DOWN(memory_end); + pages = last_pfn - first_pfn; + + /* + * Partially used pages are not usable - thus + * we are rounding upwards: + */ + start_pfn = PFN_UP(__pa(_end)); + + /* + * Find a proper area for the bootmem bitmap. After this + * bootstrap step all allocations (until the page allocator + * is intact) must be done via bootmem_alloc(). + */ + bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, + first_pfn, + last_pfn); + /* + * Round it up. + */ + bootmap_size = PFN_PHYS(PFN_UP(bootmap_size)); + + /* + * Register fully available RAM pages with the bootmem allocator. + */ + free_bootmem_node(NODE_DATA(0), PFN_PHYS(first_pfn), PFN_PHYS(pages)); + + /* + * Reserve all kernel sections + bootmem bitmap + a guard page. + */ + reserve_bootmem_node(NODE_DATA(0), PFN_PHYS(first_pfn), + (PFN_PHYS(start_pfn) + bootmap_size + PAGE_SIZE) - PFN_PHYS(first_pfn)); + + /* + * Reserve platform dependent sections + */ + platform_reserve(); + +#ifdef CONFIG_BLK_DEV_INITRD + if (LOADER_TYPE && INITRD_START) { + if (INITRD_START + INITRD_SIZE <= (PFN_PHYS(last_pfn))) { + reserve_bootmem_node(NODE_DATA(0), INITRD_START + __MEMORY_START, INITRD_SIZE); + + initrd_start = + (long) INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0; + + initrd_end = initrd_start + INITRD_SIZE; + } else { + printk("initrd extends beyond end of memory " + "(0x%08lx > 0x%08lx)\ndisabling initrd\n", + (long) INITRD_START + INITRD_SIZE, + PFN_PHYS(last_pfn)); + initrd_start = 0; + } + } +#endif + + /* + * Claim all RAM, ROM, and I/O resources. + */ + + /* Kernel RAM */ + request_resource(&iomem_resource, &code_resource); + request_resource(&iomem_resource, &data_resource); + + /* Other KRAM space */ + for (i = 0; i < STANDARD_KRAM_RESOURCES - 2; i++) + request_resource(&iomem_resource, + &platform_parms.kram_res_p[i]); + + /* XRAM space */ + for (i = 0; i < STANDARD_XRAM_RESOURCES; i++) + request_resource(&iomem_resource, + &platform_parms.xram_res_p[i]); + + /* ROM space */ + for (i = 0; i < STANDARD_ROM_RESOURCES; i++) + request_resource(&iomem_resource, + &platform_parms.rom_res_p[i]); + + /* I/O space */ + for (i = 0; i < STANDARD_IO_RESOURCES; i++) + request_resource(&ioport_resource, + &platform_parms.io_res_p[i]); + + +#ifdef CONFIG_VT +#if defined(CONFIG_VGA_CONSOLE) + conswitchp = &vga_con; +#elif defined(CONFIG_DUMMY_CONSOLE) + conswitchp = &dummy_con; +#endif +#endif + + printk("Hardware FPU: %s\n", fpu_in_use ? "enabled" : "disabled"); + + paging_init(); +} + +void __xchg_called_with_bad_pointer(void) +{ + printk(KERN_EMERG "xchg() called with bad pointer !\n"); +} + +static struct cpu cpu[1]; + +static int __init topology_init(void) +{ + return register_cpu(cpu, 0, NULL); +} + +subsys_initcall(topology_init); + +/* + * Get CPU information + */ +static const char *cpu_name[] = { + [CPU_SH5_101] = "SH5-101", + [CPU_SH5_103] = "SH5-103", + [CPU_SH_NONE] = "Unknown", +}; + +const char *get_cpu_subtype(void) +{ + return cpu_name[boot_cpu_data.type]; +} + +#ifdef CONFIG_PROC_FS +static int show_cpuinfo(struct seq_file *m,void *v) +{ + unsigned int cpu = smp_processor_id(); + + if (!cpu) + seq_printf(m, "machine\t\t: %s\n", get_system_type()); + + seq_printf(m, "processor\t: %d\n", cpu); + seq_printf(m, "cpu family\t: SH-5\n"); + seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype()); + + seq_printf(m, "icache size\t: %dK-bytes\n", + (boot_cpu_data.icache.ways * + boot_cpu_data.icache.sets * + boot_cpu_data.icache.linesz) >> 10); + seq_printf(m, "dcache size\t: %dK-bytes\n", + (boot_cpu_data.dcache.ways * + boot_cpu_data.dcache.sets * + boot_cpu_data.dcache.linesz) >> 10); + seq_printf(m, "itlb entries\t: %d\n", boot_cpu_data.itlb.entries); + seq_printf(m, "dtlb entries\t: %d\n", boot_cpu_data.dtlb.entries); + +#define PRINT_CLOCK(name, value) \ + seq_printf(m, name " clock\t: %d.%02dMHz\n", \ + ((value) / 1000000), ((value) % 1000000)/10000) + + PRINT_CLOCK("cpu", boot_cpu_data.cpu_clock); + PRINT_CLOCK("bus", boot_cpu_data.bus_clock); + PRINT_CLOCK("module", boot_cpu_data.module_clock); + + seq_printf(m, "bogomips\t: %lu.%02lu\n\n", + (loops_per_jiffy*HZ+2500)/500000, + ((loops_per_jiffy*HZ+2500)/5000) % 100); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + return (void*)(*pos == 0); +} +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + return NULL; +} +static void c_stop(struct seq_file *m, void *v) +{ +} +struct seq_operations cpuinfo_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = show_cpuinfo, +}; +#endif /* CONFIG_PROC_FS */ diff --git a/arch/sh64/kernel/sh_ksyms.c b/arch/sh64/kernel/sh_ksyms.c new file mode 100644 index 0000000..0b5497d --- /dev/null +++ b/arch/sh64/kernel/sh_ksyms.c @@ -0,0 +1,89 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/sh_ksyms.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * + */ + +#include <linux/config.h> +#include <linux/rwsem.h> +#include <linux/module.h> +#include <linux/smp.h> +#include <linux/user.h> +#include <linux/elfcore.h> +#include <linux/sched.h> +#include <linux/in6.h> +#include <linux/interrupt.h> +#include <linux/smp_lock.h> +#include <linux/tty.h> + +#include <asm/semaphore.h> +#include <asm/processor.h> +#include <asm/uaccess.h> +#include <asm/checksum.h> +#include <asm/io.h> +#include <asm/delay.h> +#include <asm/irq.h> + +extern void dump_thread(struct pt_regs *, struct user *); +extern int dump_fpu(struct pt_regs *, elf_fpregset_t *); + +#if 0 +/* Not yet - there's no declaration of drive_info anywhere. */ +#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE) +extern struct drive_info_struct drive_info; +EXPORT_SYMBOL(drive_info); +#endif +#endif + +/* platform dependent support */ +EXPORT_SYMBOL(dump_thread); +EXPORT_SYMBOL(dump_fpu); +EXPORT_SYMBOL(iounmap); +EXPORT_SYMBOL(enable_irq); +EXPORT_SYMBOL(disable_irq); +EXPORT_SYMBOL(kernel_thread); + +/* Networking helper routines. */ +EXPORT_SYMBOL(csum_partial_copy); + +EXPORT_SYMBOL(strpbrk); +EXPORT_SYMBOL(strstr); + +#ifdef CONFIG_VT +EXPORT_SYMBOL(screen_info); +#endif + +EXPORT_SYMBOL(__down); +EXPORT_SYMBOL(__down_trylock); +EXPORT_SYMBOL(__up); +EXPORT_SYMBOL(__put_user_asm_l); +EXPORT_SYMBOL(__get_user_asm_l); +EXPORT_SYMBOL(memcmp); +EXPORT_SYMBOL(memcpy); +EXPORT_SYMBOL(memset); +EXPORT_SYMBOL(memscan); +EXPORT_SYMBOL(strchr); +EXPORT_SYMBOL(strlen); + +EXPORT_SYMBOL(flush_dcache_page); + +/* For ext3 */ +EXPORT_SYMBOL(sh64_page_clear); + +/* Ugh. These come in from libgcc.a at link time. */ + +extern void __sdivsi3(void); +extern void __muldi3(void); +extern void __udivsi3(void); +extern char __div_table; +EXPORT_SYMBOL(__sdivsi3); +EXPORT_SYMBOL(__muldi3); +EXPORT_SYMBOL(__udivsi3); +EXPORT_SYMBOL(__div_table); + + diff --git a/arch/sh64/kernel/signal.c b/arch/sh64/kernel/signal.c new file mode 100644 index 0000000..45ad102 --- /dev/null +++ b/arch/sh64/kernel/signal.c @@ -0,0 +1,727 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/signal.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003 Paul Mundt + * Copyright (C) 2004 Richard Curnow + * + * Started from sh version. + * + */ +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/kernel.h> +#include <linux/signal.h> +#include <linux/errno.h> +#include <linux/wait.h> +#include <linux/personality.h> +#include <linux/suspend.h> +#include <linux/ptrace.h> +#include <linux/unistd.h> +#include <linux/stddef.h> +#include <linux/personality.h> +#include <asm/ucontext.h> +#include <asm/uaccess.h> +#include <asm/pgtable.h> + + +#define REG_RET 9 +#define REG_ARG1 2 +#define REG_ARG2 3 +#define REG_ARG3 4 +#define REG_SP 15 +#define REG_PR 18 +#define REF_REG_RET regs->regs[REG_RET] +#define REF_REG_SP regs->regs[REG_SP] +#define DEREF_REG_PR regs->regs[REG_PR] + +#define DEBUG_SIG 0 + +#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) + +asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset); + +/* + * Atomically swap in the new signal mask, and wait for a signal. + */ + +asmlinkage int +sys_sigsuspend(old_sigset_t mask, + unsigned long r3, unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs * regs) +{ + sigset_t saveset; + + mask &= _BLOCKABLE; + spin_lock_irq(¤t->sighand->siglock); + saveset = current->blocked; + siginitset(¤t->blocked, mask); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + REF_REG_RET = -EINTR; + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + regs->pc += 4; /* because sys_sigreturn decrements the pc */ + if (do_signal(regs, &saveset)) { + /* pc now points at signal handler. Need to decrement + it because entry.S will increment it. */ + regs->pc -= 4; + return -EINTR; + } + } +} + +asmlinkage int +sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize, + unsigned long r4, unsigned long r5, unsigned long r6, + unsigned long r7, + struct pt_regs * regs) +{ + sigset_t saveset, newset; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (copy_from_user(&newset, unewset, sizeof(newset))) + return -EFAULT; + sigdelsetmask(&newset, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + saveset = current->blocked; + current->blocked = newset; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + REF_REG_RET = -EINTR; + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + regs->pc += 4; /* because sys_sigreturn decrements the pc */ + if (do_signal(regs, &saveset)) { + /* pc now points at signal handler. Need to decrement + it because entry.S will increment it. */ + regs->pc -= 4; + return -EINTR; + } + } +} + +asmlinkage int +sys_sigaction(int sig, const struct old_sigaction __user *act, + struct old_sigaction __user *oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + + if (act) { + old_sigset_t mask; + if (!access_ok(VERIFY_READ, act, sizeof(*act)) || + __get_user(new_ka.sa.sa_handler, &act->sa_handler) || + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) + return -EFAULT; + __get_user(new_ka.sa.sa_flags, &act->sa_flags); + __get_user(mask, &act->sa_mask); + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) { + if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || + __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) + return -EFAULT; + __put_user(old_ka.sa.sa_flags, &oact->sa_flags); + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); + } + + return ret; +} + +asmlinkage int +sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, + unsigned long r4, unsigned long r5, unsigned long r6, + unsigned long r7, + struct pt_regs * regs) +{ + return do_sigaltstack(uss, uoss, REF_REG_SP); +} + + +/* + * Do a signal return; undo the signal stack. + */ + +struct sigframe +{ + struct sigcontext sc; + unsigned long extramask[_NSIG_WORDS-1]; + long long retcode[2]; +}; + +struct rt_sigframe +{ + struct siginfo __user *pinfo; + void *puc; + struct siginfo info; + struct ucontext uc; + long long retcode[2]; +}; + +#ifdef CONFIG_SH_FPU +static inline int +restore_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) +{ + int err = 0; + int fpvalid; + + err |= __get_user (fpvalid, &sc->sc_fpvalid); + conditional_used_math(fpvalid); + if (! fpvalid) + return err; + + if (current == last_task_used_math) { + last_task_used_math = NULL; + regs->sr |= SR_FD; + } + + err |= __copy_from_user(¤t->thread.fpu.hard, &sc->sc_fpregs[0], + (sizeof(long long) * 32) + (sizeof(int) * 1)); + + return err; +} + +static inline int +setup_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) +{ + int err = 0; + int fpvalid; + + fpvalid = !!used_math(); + err |= __put_user(fpvalid, &sc->sc_fpvalid); + if (! fpvalid) + return err; + + if (current == last_task_used_math) { + grab_fpu(); + fpsave(¤t->thread.fpu.hard); + release_fpu(); + last_task_used_math = NULL; + regs->sr |= SR_FD; + } + + err |= __copy_to_user(&sc->sc_fpregs[0], ¤t->thread.fpu.hard, + (sizeof(long long) * 32) + (sizeof(int) * 1)); + clear_used_math(); + + return err; +} +#else +static inline int +restore_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) +{} +static inline int +setup_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) +{} +#endif + +static int +restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, long long *r2_p) +{ + unsigned int err = 0; + unsigned long long current_sr, new_sr; +#define SR_MASK 0xffff8cfd + +#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) + + COPY(regs[0]); COPY(regs[1]); COPY(regs[2]); COPY(regs[3]); + COPY(regs[4]); COPY(regs[5]); COPY(regs[6]); COPY(regs[7]); + COPY(regs[8]); COPY(regs[9]); COPY(regs[10]); COPY(regs[11]); + COPY(regs[12]); COPY(regs[13]); COPY(regs[14]); COPY(regs[15]); + COPY(regs[16]); COPY(regs[17]); COPY(regs[18]); COPY(regs[19]); + COPY(regs[20]); COPY(regs[21]); COPY(regs[22]); COPY(regs[23]); + COPY(regs[24]); COPY(regs[25]); COPY(regs[26]); COPY(regs[27]); + COPY(regs[28]); COPY(regs[29]); COPY(regs[30]); COPY(regs[31]); + COPY(regs[32]); COPY(regs[33]); COPY(regs[34]); COPY(regs[35]); + COPY(regs[36]); COPY(regs[37]); COPY(regs[38]); COPY(regs[39]); + COPY(regs[40]); COPY(regs[41]); COPY(regs[42]); COPY(regs[43]); + COPY(regs[44]); COPY(regs[45]); COPY(regs[46]); COPY(regs[47]); + COPY(regs[48]); COPY(regs[49]); COPY(regs[50]); COPY(regs[51]); + COPY(regs[52]); COPY(regs[53]); COPY(regs[54]); COPY(regs[55]); + COPY(regs[56]); COPY(regs[57]); COPY(regs[58]); COPY(regs[59]); + COPY(regs[60]); COPY(regs[61]); COPY(regs[62]); + COPY(tregs[0]); COPY(tregs[1]); COPY(tregs[2]); COPY(tregs[3]); + COPY(tregs[4]); COPY(tregs[5]); COPY(tregs[6]); COPY(tregs[7]); + + /* Prevent the signal handler manipulating SR in a way that can + crash the kernel. i.e. only allow S, Q, M, PR, SZ, FR to be + modified */ + current_sr = regs->sr; + err |= __get_user(new_sr, &sc->sc_sr); + regs->sr &= SR_MASK; + regs->sr |= (new_sr & ~SR_MASK); + + COPY(pc); + +#undef COPY + + /* Must do this last in case it sets regs->sr.fd (i.e. after rest of sr + * has been restored above.) */ + err |= restore_sigcontext_fpu(regs, sc); + + regs->syscall_nr = -1; /* disable syscall checks */ + err |= __get_user(*r2_p, &sc->sc_regs[REG_RET]); + return err; +} + +asmlinkage int sys_sigreturn(unsigned long r2, unsigned long r3, + unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs * regs) +{ + struct sigframe __user *frame = (struct sigframe __user *) (long) REF_REG_SP; + sigset_t set; + long long ret; + + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + + if (__get_user(set.sig[0], &frame->sc.oldmask) + || (_NSIG_WORDS > 1 + && __copy_from_user(&set.sig[1], &frame->extramask, + sizeof(frame->extramask)))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + if (restore_sigcontext(regs, &frame->sc, &ret)) + goto badframe; + regs->pc -= 4; + + return (int) ret; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +asmlinkage int sys_rt_sigreturn(unsigned long r2, unsigned long r3, + unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7, + struct pt_regs * regs) +{ + struct rt_sigframe __user *frame = (struct rt_sigframe __user *) (long) REF_REG_SP; + sigset_t set; + stack_t __user st; + long long ret; + + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + + if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) + goto badframe; + + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ret)) + goto badframe; + regs->pc -= 4; + + if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st))) + goto badframe; + /* It is more difficult to avoid calling this function than to + call it and ignore errors. */ + do_sigaltstack(&st, NULL, REF_REG_SP); + + return (int) ret; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +/* + * Set up a signal frame. + */ + +static int +setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, + unsigned long mask) +{ + int err = 0; + + /* Do this first, otherwise is this sets sr->fd, that value isn't preserved. */ + err |= setup_sigcontext_fpu(regs, sc); + +#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) + + COPY(regs[0]); COPY(regs[1]); COPY(regs[2]); COPY(regs[3]); + COPY(regs[4]); COPY(regs[5]); COPY(regs[6]); COPY(regs[7]); + COPY(regs[8]); COPY(regs[9]); COPY(regs[10]); COPY(regs[11]); + COPY(regs[12]); COPY(regs[13]); COPY(regs[14]); COPY(regs[15]); + COPY(regs[16]); COPY(regs[17]); COPY(regs[18]); COPY(regs[19]); + COPY(regs[20]); COPY(regs[21]); COPY(regs[22]); COPY(regs[23]); + COPY(regs[24]); COPY(regs[25]); COPY(regs[26]); COPY(regs[27]); + COPY(regs[28]); COPY(regs[29]); COPY(regs[30]); COPY(regs[31]); + COPY(regs[32]); COPY(regs[33]); COPY(regs[34]); COPY(regs[35]); + COPY(regs[36]); COPY(regs[37]); COPY(regs[38]); COPY(regs[39]); + COPY(regs[40]); COPY(regs[41]); COPY(regs[42]); COPY(regs[43]); + COPY(regs[44]); COPY(regs[45]); COPY(regs[46]); COPY(regs[47]); + COPY(regs[48]); COPY(regs[49]); COPY(regs[50]); COPY(regs[51]); + COPY(regs[52]); COPY(regs[53]); COPY(regs[54]); COPY(regs[55]); + COPY(regs[56]); COPY(regs[57]); COPY(regs[58]); COPY(regs[59]); + COPY(regs[60]); COPY(regs[61]); COPY(regs[62]); + COPY(tregs[0]); COPY(tregs[1]); COPY(tregs[2]); COPY(tregs[3]); + COPY(tregs[4]); COPY(tregs[5]); COPY(tregs[6]); COPY(tregs[7]); + COPY(sr); COPY(pc); + +#undef COPY + + err |= __put_user(mask, &sc->oldmask); + + return err; +} + +/* + * Determine which stack to use.. + */ +static inline void __user * +get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size) +{ + if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! on_sig_stack(sp)) + sp = current->sas_ss_sp + current->sas_ss_size; + + return (void __user *)((sp - frame_size) & -8ul); +} + +void sa_default_restorer(void); /* See comments below */ +void sa_default_rt_restorer(void); /* See comments below */ + +static void setup_frame(int sig, struct k_sigaction *ka, + sigset_t *set, struct pt_regs *regs) +{ + struct sigframe __user *frame; + int err = 0; + int signal; + + frame = get_sigframe(ka, regs->regs[REG_SP], sizeof(*frame)); + + if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) + goto give_sigsegv; + + signal = current_thread_info()->exec_domain + && current_thread_info()->exec_domain->signal_invmap + && sig < 32 + ? current_thread_info()->exec_domain->signal_invmap[sig] + : sig; + + err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); + + /* Give up earlier as i386, in case */ + if (err) + goto give_sigsegv; + + if (_NSIG_WORDS > 1) { + err |= __copy_to_user(frame->extramask, &set->sig[1], + sizeof(frame->extramask)); } + + /* Give up earlier as i386, in case */ + if (err) + goto give_sigsegv; + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa.sa_flags & SA_RESTORER) { + DEREF_REG_PR = (unsigned long) ka->sa.sa_restorer | 0x1; + + /* + * On SH5 all edited pointers are subject to NEFF + */ + DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ? + (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR; + } else { + /* + * Different approach on SH5. + * . Endianness independent asm code gets placed in entry.S . + * This is limited to four ASM instructions corresponding + * to two long longs in size. + * . err checking is done on the else branch only + * . flush_icache_range() is called upon __put_user() only + * . all edited pointers are subject to NEFF + * . being code, linker turns ShMedia bit on, always + * dereference index -1. + */ + DEREF_REG_PR = (unsigned long) frame->retcode | 0x01; + DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ? + (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR; + + if (__copy_to_user(frame->retcode, + (unsigned long long)sa_default_restorer & (~1), 16) != 0) + goto give_sigsegv; + + /* Cohere the trampoline with the I-cache. */ + flush_cache_sigtramp(DEREF_REG_PR-1, DEREF_REG_PR-1+16); + } + + /* + * Set up registers for signal handler. + * All edited pointers are subject to NEFF. + */ + regs->regs[REG_SP] = (unsigned long) frame; + regs->regs[REG_SP] = (regs->regs[REG_SP] & NEFF_SIGN) ? + (regs->regs[REG_SP] | NEFF_MASK) : regs->regs[REG_SP]; + regs->regs[REG_ARG1] = signal; /* Arg for signal handler */ + + /* FIXME: + The glibc profiling support for SH-5 needs to be passed a sigcontext + so it can retrieve the PC. At some point during 2003 the glibc + support was changed to receive the sigcontext through the 2nd + argument, but there are still versions of libc.so in use that use + the 3rd argument. Until libc.so is stabilised, pass the sigcontext + through both 2nd and 3rd arguments. + */ + + regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->sc; + regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->sc; + + regs->pc = (unsigned long) ka->sa.sa_handler; + regs->pc = (regs->pc & NEFF_SIGN) ? (regs->pc | NEFF_MASK) : regs->pc; + + set_fs(USER_DS); + +#if DEBUG_SIG + /* Broken %016Lx */ + printk("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n", + signal, + current->comm, current->pid, frame, + regs->pc >> 32, regs->pc & 0xffffffff, + DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff); +#endif + + return; + +give_sigsegv: + force_sigsegv(sig, current); +} + +static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, + sigset_t *set, struct pt_regs *regs) +{ + struct rt_sigframe __user *frame; + int err = 0; + int signal; + + frame = get_sigframe(ka, regs->regs[REG_SP], sizeof(*frame)); + + if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) + goto give_sigsegv; + + signal = current_thread_info()->exec_domain + && current_thread_info()->exec_domain->signal_invmap + && sig < 32 + ? current_thread_info()->exec_domain->signal_invmap[sig] + : sig; + + err |= __put_user(&frame->info, &frame->pinfo); + err |= __put_user(&frame->uc, &frame->puc); + err |= copy_siginfo_to_user(&frame->info, info); + + /* Give up earlier as i386, in case */ + if (err) + goto give_sigsegv; + + /* Create the ucontext. */ + err |= __put_user(0, &frame->uc.uc_flags); + err |= __put_user(0, &frame->uc.uc_link); + err |= __put_user((void *)current->sas_ss_sp, + &frame->uc.uc_stack.ss_sp); + err |= __put_user(sas_ss_flags(regs->regs[REG_SP]), + &frame->uc.uc_stack.ss_flags); + err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); + err |= setup_sigcontext(&frame->uc.uc_mcontext, + regs, set->sig[0]); + err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); + + /* Give up earlier as i386, in case */ + if (err) + goto give_sigsegv; + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + if (ka->sa.sa_flags & SA_RESTORER) { + DEREF_REG_PR = (unsigned long) ka->sa.sa_restorer | 0x1; + + /* + * On SH5 all edited pointers are subject to NEFF + */ + DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ? + (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR; + } else { + /* + * Different approach on SH5. + * . Endianness independent asm code gets placed in entry.S . + * This is limited to four ASM instructions corresponding + * to two long longs in size. + * . err checking is done on the else branch only + * . flush_icache_range() is called upon __put_user() only + * . all edited pointers are subject to NEFF + * . being code, linker turns ShMedia bit on, always + * dereference index -1. + */ + + DEREF_REG_PR = (unsigned long) frame->retcode | 0x01; + DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ? + (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR; + + if (__copy_to_user(frame->retcode, + (unsigned long long)sa_default_rt_restorer & (~1), 16) != 0) + goto give_sigsegv; + + flush_icache_range(DEREF_REG_PR-1, DEREF_REG_PR-1+15); + } + + /* + * Set up registers for signal handler. + * All edited pointers are subject to NEFF. + */ + regs->regs[REG_SP] = (unsigned long) frame; + regs->regs[REG_SP] = (regs->regs[REG_SP] & NEFF_SIGN) ? + (regs->regs[REG_SP] | NEFF_MASK) : regs->regs[REG_SP]; + regs->regs[REG_ARG1] = signal; /* Arg for signal handler */ + regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->info; + regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->uc.uc_mcontext; + regs->pc = (unsigned long) ka->sa.sa_handler; + regs->pc = (regs->pc & NEFF_SIGN) ? (regs->pc | NEFF_MASK) : regs->pc; + + set_fs(USER_DS); + +#if DEBUG_SIG + /* Broken %016Lx */ + printk("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n", + signal, + current->comm, current->pid, frame, + regs->pc >> 32, regs->pc & 0xffffffff, + DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff); +#endif + + return; + +give_sigsegv: + force_sigsegv(sig, current); +} + +/* + * OK, we're invoking a handler + */ + +static void +handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka, + sigset_t *oldset, struct pt_regs * regs) +{ + /* Are we from a system call? */ + if (regs->syscall_nr >= 0) { + /* If so, check system call restarting.. */ + switch (regs->regs[REG_RET]) { + case -ERESTARTNOHAND: + regs->regs[REG_RET] = -EINTR; + break; + + case -ERESTARTSYS: + if (!(ka->sa.sa_flags & SA_RESTART)) { + regs->regs[REG_RET] = -EINTR; + break; + } + /* fallthrough */ + case -ERESTARTNOINTR: + /* Decode syscall # */ + regs->regs[REG_RET] = regs->syscall_nr; + regs->pc -= 4; + } + } + + /* Set up the stack frame */ + if (ka->sa.sa_flags & SA_SIGINFO) + setup_rt_frame(sig, ka, info, oldset, regs); + else + setup_frame(sig, ka, oldset, regs); + + if (!(ka->sa.sa_flags & SA_NODEFER)) { + spin_lock_irq(¤t->sighand->siglock); + sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); + sigaddset(¤t->blocked,sig); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + } +} + +/* + * Note that 'init' is a special process: it doesn't get signals it doesn't + * want to handle. Thus you cannot kill init even with a SIGKILL even by + * mistake. + * + * Note that we go through the signals twice: once to check the signals that + * the kernel can handle, and then we build all the user-level signal handling + * stack-frames in one go after that. + */ +int do_signal(struct pt_regs *regs, sigset_t *oldset) +{ + siginfo_t info; + int signr; + struct k_sigaction ka; + + /* + * We want the common case to go fast, which + * is why we may in certain cases get here from + * kernel mode. Just return without doing anything + * if so. + */ + if (!user_mode(regs)) + return 1; + + if (try_to_freeze(0)) + goto no_signal; + + if (!oldset) + oldset = ¤t->blocked; + + signr = get_signal_to_deliver(&info, &ka, regs, 0); + + if (signr > 0) { + /* Whee! Actually deliver the signal. */ + handle_signal(signr, &info, &ka, oldset, regs); + return 1; + } + +no_signal: + /* Did we come from a system call? */ + if (regs->syscall_nr >= 0) { + /* Restart the system call - no handlers present */ + if (regs->regs[REG_RET] == -ERESTARTNOHAND || + regs->regs[REG_RET] == -ERESTARTSYS || + regs->regs[REG_RET] == -ERESTARTNOINTR) { + /* Decode Syscall # */ + regs->regs[REG_RET] = regs->syscall_nr; + regs->pc -= 4; + } + } + return 0; +} diff --git a/arch/sh64/kernel/switchto.S b/arch/sh64/kernel/switchto.S new file mode 100644 index 0000000..45b2d90 --- /dev/null +++ b/arch/sh64/kernel/switchto.S @@ -0,0 +1,198 @@ +/* + * arch/sh64/kernel/switchto.S + * + * sh64 context switch + * + * Copyright (C) 2004 Richard Curnow + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. +*/ + + .section .text..SHmedia32,"ax" + .little + + .balign 32 + + .type sh64_switch_to,@function + .global sh64_switch_to + .global __sh64_switch_to_end +sh64_switch_to: + +/* Incoming args + r2 - prev + r3 - &prev->thread + r4 - next + r5 - &next->thread + + Outgoing results + r2 - last (=prev) : this just stays in r2 throughout + + Want to create a full (struct pt_regs) on the stack to allow backtracing + functions to work. However, we only need to populate the callee-save + register slots in this structure; since we're a function our ancestors must + have themselves preserved all caller saved state in the stack. This saves + some wasted effort since we won't need to look at the values. + + In particular, all caller-save registers are immediately available for + scratch use. + +*/ + +#define FRAME_SIZE (76*8 + 8) + + movi FRAME_SIZE, r0 + sub.l r15, r0, r15 + ! Do normal-style register save to support backtrace + + st.l r15, 0, r18 ! save link reg + st.l r15, 4, r14 ! save fp + add.l r15, r63, r14 ! setup frame pointer + + ! hopefully this looks normal to the backtrace now. + + addi.l r15, 8, r1 ! base of pt_regs + addi.l r1, 24, r0 ! base of pt_regs.regs + addi.l r0, (63*8), r8 ! base of pt_regs.trregs + + /* Note : to be fixed? + struct pt_regs is really designed for holding the state on entry + to an exception, i.e. pc,sr,regs etc. However, for the context + switch state, some of this is not required. But the unwinder takes + struct pt_regs * as an arg so we have to build this structure + to allow unwinding switched tasks in show_state() */ + + st.q r0, ( 9*8), r9 + st.q r0, (10*8), r10 + st.q r0, (11*8), r11 + st.q r0, (12*8), r12 + st.q r0, (13*8), r13 + st.q r0, (14*8), r14 ! for unwind, want to look as though we took a trap at + ! the point where the process is left in suspended animation, i.e. current + ! fp here, not the saved one. + st.q r0, (16*8), r16 + + st.q r0, (24*8), r24 + st.q r0, (25*8), r25 + st.q r0, (26*8), r26 + st.q r0, (27*8), r27 + st.q r0, (28*8), r28 + st.q r0, (29*8), r29 + st.q r0, (30*8), r30 + st.q r0, (31*8), r31 + st.q r0, (32*8), r32 + st.q r0, (33*8), r33 + st.q r0, (34*8), r34 + st.q r0, (35*8), r35 + + st.q r0, (44*8), r44 + st.q r0, (45*8), r45 + st.q r0, (46*8), r46 + st.q r0, (47*8), r47 + st.q r0, (48*8), r48 + st.q r0, (49*8), r49 + st.q r0, (50*8), r50 + st.q r0, (51*8), r51 + st.q r0, (52*8), r52 + st.q r0, (53*8), r53 + st.q r0, (54*8), r54 + st.q r0, (55*8), r55 + st.q r0, (56*8), r56 + st.q r0, (57*8), r57 + st.q r0, (58*8), r58 + st.q r0, (59*8), r59 + + ! do this early as pta->gettr has no pipeline forwarding (=> 5 cycle latency) + ! Use a local label to avoid creating a symbol that will confuse the ! + ! backtrace + pta .Lsave_pc, tr0 + + gettr tr5, r45 + gettr tr6, r46 + gettr tr7, r47 + st.q r8, (5*8), r45 + st.q r8, (6*8), r46 + st.q r8, (7*8), r47 + + ! Now switch context + gettr tr0, r9 + st.l r3, 0, r15 ! prev->thread.sp + st.l r3, 8, r1 ! prev->thread.kregs + st.l r3, 4, r9 ! prev->thread.pc + st.q r1, 0, r9 ! save prev->thread.pc into pt_regs->pc + + ! Load PC for next task (init value or save_pc later) + ld.l r5, 4, r18 ! next->thread.pc + ! Switch stacks + ld.l r5, 0, r15 ! next->thread.sp + ptabs r18, tr0 + + ! Update current + ld.l r4, 4, r9 ! next->thread_info (2nd element of next task_struct) + putcon r9, kcr0 ! current = next->thread_info + + ! go to save_pc for a reschedule, or the initial thread.pc for a new process + blink tr0, r63 + + ! Restore (when we come back to a previously saved task) +.Lsave_pc: + addi.l r15, 32, r0 ! r0 = next's regs + addi.l r0, (63*8), r8 ! r8 = next's tr_regs + + ld.q r8, (5*8), r45 + ld.q r8, (6*8), r46 + ld.q r8, (7*8), r47 + ptabs r45, tr5 + ptabs r46, tr6 + ptabs r47, tr7 + + ld.q r0, ( 9*8), r9 + ld.q r0, (10*8), r10 + ld.q r0, (11*8), r11 + ld.q r0, (12*8), r12 + ld.q r0, (13*8), r13 + ld.q r0, (14*8), r14 + ld.q r0, (16*8), r16 + + ld.q r0, (24*8), r24 + ld.q r0, (25*8), r25 + ld.q r0, (26*8), r26 + ld.q r0, (27*8), r27 + ld.q r0, (28*8), r28 + ld.q r0, (29*8), r29 + ld.q r0, (30*8), r30 + ld.q r0, (31*8), r31 + ld.q r0, (32*8), r32 + ld.q r0, (33*8), r33 + ld.q r0, (34*8), r34 + ld.q r0, (35*8), r35 + + ld.q r0, (44*8), r44 + ld.q r0, (45*8), r45 + ld.q r0, (46*8), r46 + ld.q r0, (47*8), r47 + ld.q r0, (48*8), r48 + ld.q r0, (49*8), r49 + ld.q r0, (50*8), r50 + ld.q r0, (51*8), r51 + ld.q r0, (52*8), r52 + ld.q r0, (53*8), r53 + ld.q r0, (54*8), r54 + ld.q r0, (55*8), r55 + ld.q r0, (56*8), r56 + ld.q r0, (57*8), r57 + ld.q r0, (58*8), r58 + ld.q r0, (59*8), r59 + + ! epilogue + ld.l r15, 0, r18 + ld.l r15, 4, r14 + ptabs r18, tr0 + movi FRAME_SIZE, r0 + add r15, r0, r15 + blink tr0, r63 +__sh64_switch_to_end: +.LFE1: + .size sh64_switch_to,.LFE1-sh64_switch_to + diff --git a/arch/sh64/kernel/sys_sh64.c b/arch/sh64/kernel/sys_sh64.c new file mode 100644 index 0000000..4546845b --- /dev/null +++ b/arch/sh64/kernel/sys_sh64.c @@ -0,0 +1,300 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/sys_sh64.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * + * This file contains various random system calls that + * have a non-standard calling sequence on the Linux/SH5 + * platform. + * + * Mostly taken from i386 version. + * + */ + +#include <linux/errno.h> +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/sem.h> +#include <linux/msg.h> +#include <linux/shm.h> +#include <linux/stat.h> +#include <linux/mman.h> +#include <linux/file.h> +#include <linux/utsname.h> +#include <linux/syscalls.h> +#include <asm/uaccess.h> +#include <asm/ipc.h> +#include <asm/ptrace.h> + +#define REG_3 3 + +/* + * sys_pipe() is the normal C calling standard for creating + * a pipe. It's not the way Unix traditionally does this, though. + */ +#ifdef NEW_PIPE_IMPLEMENTATION +asmlinkage int sys_pipe(unsigned long * fildes, + unsigned long dummy_r3, + unsigned long dummy_r4, + unsigned long dummy_r5, + unsigned long dummy_r6, + unsigned long dummy_r7, + struct pt_regs * regs) /* r8 = pt_regs forced by entry.S */ +{ + int fd[2]; + int ret; + + ret = do_pipe(fd); + if (ret == 0) + /* + *********************************************************************** + * To avoid the copy_to_user we prefer to break the ABIs convention, * + * packing the valid pair of file IDs into a single register (r3); * + * while r2 is the return code as defined by the sh5-ABIs. * + * BE CAREFUL: pipe stub, into glibc, must be aware of this solution * + *********************************************************************** + +#ifdef __LITTLE_ENDIAN__ + regs->regs[REG_3] = (((unsigned long long) fd[1]) << 32) | ((unsigned long long) fd[0]); +#else + regs->regs[REG_3] = (((unsigned long long) fd[0]) << 32) | ((unsigned long long) fd[1]); +#endif + + */ + /* although not very clever this is endianess independent */ + regs->regs[REG_3] = (unsigned long long) *((unsigned long long *) fd); + + return ret; +} + +#else +asmlinkage int sys_pipe(unsigned long * fildes) +{ + int fd[2]; + int error; + + error = do_pipe(fd); + if (!error) { + if (copy_to_user(fildes, fd, 2*sizeof(int))) + error = -EFAULT; + } + return error; +} + +#endif + +/* + * To avoid cache alias, we map the shard page with same color. + */ +#define COLOUR_ALIGN(addr) (((addr)+SHMLBA-1)&~(SHMLBA-1)) + +unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, unsigned long flags) +{ + struct vm_area_struct *vma; + + if (flags & MAP_FIXED) { + /* We do not accept a shared mapping if it would violate + * cache aliasing constraints. + */ + if ((flags & MAP_SHARED) && (addr & (SHMLBA - 1))) + return -EINVAL; + return addr; + } + + if (len > TASK_SIZE) + return -ENOMEM; + if (!addr) + addr = TASK_UNMAPPED_BASE; + + if (flags & MAP_PRIVATE) + addr = PAGE_ALIGN(addr); + else + addr = COLOUR_ALIGN(addr); + + for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) { + /* At this point: (!vma || addr < vma->vm_end). */ + if (TASK_SIZE - len < addr) + return -ENOMEM; + if (!vma || addr + len <= vma->vm_start) + return addr; + addr = vma->vm_end; + if (!(flags & MAP_PRIVATE)) + addr = COLOUR_ALIGN(addr); + } +} + +/* common code for old and new mmaps */ +static inline long do_mmap2( + unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) +{ + int error = -EBADF; + struct file * file = NULL; + + flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + if (!(flags & MAP_ANONYMOUS)) { + file = fget(fd); + if (!file) + goto out; + } + + down_write(¤t->mm->mmap_sem); + error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); + up_write(¤t->mm->mmap_sem); + + if (file) + fput(file); +out: + return error; +} + +asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) +{ + return do_mmap2(addr, len, prot, flags, fd, pgoff); +} + +asmlinkage int old_mmap(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + int fd, unsigned long off) +{ + if (off & ~PAGE_MASK) + return -EINVAL; + return do_mmap2(addr, len, prot, flags, fd, off>>PAGE_SHIFT); +} + +/* + * sys_ipc() is the de-multiplexer for the SysV IPC calls.. + * + * This is really horribly ugly. + */ +asmlinkage int sys_ipc(uint call, int first, int second, + int third, void __user *ptr, long fifth) +{ + int version, ret; + + version = call >> 16; /* hack for backward compatibility */ + call &= 0xffff; + + if (call <= SEMCTL) + switch (call) { + case SEMOP: + return sys_semtimedop(first, (struct sembuf __user *)ptr, + second, NULL); + case SEMTIMEDOP: + return sys_semtimedop(first, (struct sembuf __user *)ptr, + second, + (const struct timespec __user *)fifth); + case SEMGET: + return sys_semget (first, second, third); + case SEMCTL: { + union semun fourth; + if (!ptr) + return -EINVAL; + if (get_user(fourth.__pad, (void * __user *) ptr)) + return -EFAULT; + return sys_semctl (first, second, third, fourth); + } + default: + return -EINVAL; + } + + if (call <= MSGCTL) + switch (call) { + case MSGSND: + return sys_msgsnd (first, (struct msgbuf __user *) ptr, + second, third); + case MSGRCV: + switch (version) { + case 0: { + struct ipc_kludge tmp; + if (!ptr) + return -EINVAL; + + if (copy_from_user(&tmp, + (struct ipc_kludge __user *) ptr, + sizeof (tmp))) + return -EFAULT; + return sys_msgrcv (first, tmp.msgp, second, + tmp.msgtyp, third); + } + default: + return sys_msgrcv (first, + (struct msgbuf __user *) ptr, + second, fifth, third); + } + case MSGGET: + return sys_msgget ((key_t) first, second); + case MSGCTL: + return sys_msgctl (first, second, + (struct msqid_ds __user *) ptr); + default: + return -EINVAL; + } + if (call <= SHMCTL) + switch (call) { + case SHMAT: + switch (version) { + default: { + ulong raddr; + ret = do_shmat (first, (char __user *) ptr, + second, &raddr); + if (ret) + return ret; + return put_user (raddr, (ulong __user *) third); + } + case 1: /* iBCS2 emulator entry point */ + if (!segment_eq(get_fs(), get_ds())) + return -EINVAL; + return do_shmat (first, (char __user *) ptr, + second, (ulong *) third); + } + case SHMDT: + return sys_shmdt ((char __user *)ptr); + case SHMGET: + return sys_shmget (first, second, third); + case SHMCTL: + return sys_shmctl (first, second, + (struct shmid_ds __user *) ptr); + default: + return -EINVAL; + } + + return -EINVAL; +} + +asmlinkage int sys_uname(struct old_utsname * name) +{ + int err; + if (!name) + return -EFAULT; + down_read(&uts_sem); + err=copy_to_user(name, &system_utsname, sizeof (*name)); + up_read(&uts_sem); + return err?-EFAULT:0; +} + +/* Copy from mips version */ +asmlinkage long sys_shmatcall(int shmid, char __user *shmaddr, + int shmflg) +{ + unsigned long raddr; + int err; + + err = do_shmat(shmid, shmaddr, shmflg, &raddr); + if (err) + return err; + + err = raddr; + return err; +} diff --git a/arch/sh64/kernel/syscalls.S b/arch/sh64/kernel/syscalls.S new file mode 100644 index 0000000..8ed417d --- /dev/null +++ b/arch/sh64/kernel/syscalls.S @@ -0,0 +1,345 @@ +/* + * arch/sh64/kernel/syscalls.S + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2004 Paul Mundt + * Copyright (C) 2003, 2004 Richard Curnow + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/sys.h> + + .section .data, "aw" + .balign 32 + +/* + * System calls jump table + */ + .globl sys_call_table +sys_call_table: + .long sys_ni_syscall /* 0 - old "setup()" system call */ + .long sys_exit + .long sys_fork + .long sys_read + .long sys_write + .long sys_open /* 5 */ + .long sys_close + .long sys_waitpid + .long sys_creat + .long sys_link + .long sys_unlink /* 10 */ + .long sys_execve + .long sys_chdir + .long sys_time + .long sys_mknod + .long sys_chmod /* 15 */ + .long sys_lchown16 + .long sys_ni_syscall /* old break syscall holder */ + .long sys_stat + .long sys_lseek + .long sys_getpid /* 20 */ + .long sys_mount + .long sys_oldumount + .long sys_setuid16 + .long sys_getuid16 + .long sys_stime /* 25 */ + .long sys_ptrace + .long sys_alarm + .long sys_fstat + .long sys_pause + .long sys_utime /* 30 */ + .long sys_ni_syscall /* old stty syscall holder */ + .long sys_ni_syscall /* old gtty syscall holder */ + .long sys_access + .long sys_nice + .long sys_ni_syscall /* 35 */ /* old ftime syscall holder */ + .long sys_sync + .long sys_kill + .long sys_rename + .long sys_mkdir + .long sys_rmdir /* 40 */ + .long sys_dup + .long sys_pipe + .long sys_times + .long sys_ni_syscall /* old prof syscall holder */ + .long sys_brk /* 45 */ + .long sys_setgid16 + .long sys_getgid16 + .long sys_signal + .long sys_geteuid16 + .long sys_getegid16 /* 50 */ + .long sys_acct + .long sys_umount /* recycled never used phys( */ + .long sys_ni_syscall /* old lock syscall holder */ + .long sys_ioctl + .long sys_fcntl /* 55 */ + .long sys_ni_syscall /* old mpx syscall holder */ + .long sys_setpgid + .long sys_ni_syscall /* old ulimit syscall holder */ + .long sys_ni_syscall /* sys_olduname */ + .long sys_umask /* 60 */ + .long sys_chroot + .long sys_ustat + .long sys_dup2 + .long sys_getppid + .long sys_getpgrp /* 65 */ + .long sys_setsid + .long sys_sigaction + .long sys_sgetmask + .long sys_ssetmask + .long sys_setreuid16 /* 70 */ + .long sys_setregid16 + .long sys_sigsuspend + .long sys_sigpending + .long sys_sethostname + .long sys_setrlimit /* 75 */ + .long sys_old_getrlimit + .long sys_getrusage + .long sys_gettimeofday + .long sys_settimeofday + .long sys_getgroups16 /* 80 */ + .long sys_setgroups16 + .long sys_ni_syscall /* sys_oldselect */ + .long sys_symlink + .long sys_lstat + .long sys_readlink /* 85 */ + .long sys_uselib + .long sys_swapon + .long sys_reboot + .long old_readdir + .long old_mmap /* 90 */ + .long sys_munmap + .long sys_truncate + .long sys_ftruncate + .long sys_fchmod + .long sys_fchown16 /* 95 */ + .long sys_getpriority + .long sys_setpriority + .long sys_ni_syscall /* old profil syscall holder */ + .long sys_statfs + .long sys_fstatfs /* 100 */ + .long sys_ni_syscall /* ioperm */ + .long sys_socketcall /* Obsolete implementation of socket syscall */ + .long sys_syslog + .long sys_setitimer + .long sys_getitimer /* 105 */ + .long sys_newstat + .long sys_newlstat + .long sys_newfstat + .long sys_uname + .long sys_ni_syscall /* 110 */ /* iopl */ + .long sys_vhangup + .long sys_ni_syscall /* idle */ + .long sys_ni_syscall /* vm86old */ + .long sys_wait4 + .long sys_swapoff /* 115 */ + .long sys_sysinfo + .long sys_ipc /* Obsolete ipc syscall implementation */ + .long sys_fsync + .long sys_sigreturn + .long sys_clone /* 120 */ + .long sys_setdomainname + .long sys_newuname + .long sys_ni_syscall /* sys_modify_ldt */ + .long sys_adjtimex + .long sys_mprotect /* 125 */ + .long sys_sigprocmask + .long sys_ni_syscall /* old "create_module" */ + .long sys_init_module + .long sys_delete_module + .long sys_ni_syscall /* 130: old "get_kernel_syms" */ + .long sys_quotactl + .long sys_getpgid + .long sys_fchdir + .long sys_bdflush + .long sys_sysfs /* 135 */ + .long sys_personality + .long sys_ni_syscall /* for afs_syscall */ + .long sys_setfsuid16 + .long sys_setfsgid16 + .long sys_llseek /* 140 */ + .long sys_getdents + .long sys_select + .long sys_flock + .long sys_msync + .long sys_readv /* 145 */ + .long sys_writev + .long sys_getsid + .long sys_fdatasync + .long sys_sysctl + .long sys_mlock /* 150 */ + .long sys_munlock + .long sys_mlockall + .long sys_munlockall + .long sys_sched_setparam + .long sys_sched_getparam /* 155 */ + .long sys_sched_setscheduler + .long sys_sched_getscheduler + .long sys_sched_yield + .long sys_sched_get_priority_max + .long sys_sched_get_priority_min /* 160 */ + .long sys_sched_rr_get_interval + .long sys_nanosleep + .long sys_mremap + .long sys_setresuid16 + .long sys_getresuid16 /* 165 */ + .long sys_ni_syscall /* vm86 */ + .long sys_ni_syscall /* old "query_module" */ + .long sys_poll + .long sys_nfsservctl + .long sys_setresgid16 /* 170 */ + .long sys_getresgid16 + .long sys_prctl + .long sys_rt_sigreturn + .long sys_rt_sigaction + .long sys_rt_sigprocmask /* 175 */ + .long sys_rt_sigpending + .long sys_rt_sigtimedwait + .long sys_rt_sigqueueinfo + .long sys_rt_sigsuspend + .long sys_pread64 /* 180 */ + .long sys_pwrite64 + .long sys_chown16 + .long sys_getcwd + .long sys_capget + .long sys_capset /* 185 */ + .long sys_sigaltstack + .long sys_sendfile + .long sys_ni_syscall /* streams1 */ + .long sys_ni_syscall /* streams2 */ + .long sys_vfork /* 190 */ + .long sys_getrlimit + .long sys_mmap2 + .long sys_truncate64 + .long sys_ftruncate64 + .long sys_stat64 /* 195 */ + .long sys_lstat64 + .long sys_fstat64 + .long sys_lchown + .long sys_getuid + .long sys_getgid /* 200 */ + .long sys_geteuid + .long sys_getegid + .long sys_setreuid + .long sys_setregid + .long sys_getgroups /* 205 */ + .long sys_setgroups + .long sys_fchown + .long sys_setresuid + .long sys_getresuid + .long sys_setresgid /* 210 */ + .long sys_getresgid + .long sys_chown + .long sys_setuid + .long sys_setgid + .long sys_setfsuid /* 215 */ + .long sys_setfsgid + .long sys_pivot_root + .long sys_mincore + .long sys_madvise + /* Broken-out socket family (maintain backwards compatibility in syscall + numbering with 2.4) */ + .long sys_socket /* 220 */ + .long sys_bind + .long sys_connect + .long sys_listen + .long sys_accept + .long sys_getsockname /* 225 */ + .long sys_getpeername + .long sys_socketpair + .long sys_send + .long sys_sendto + .long sys_recv /* 230*/ + .long sys_recvfrom + .long sys_shutdown + .long sys_setsockopt + .long sys_getsockopt + .long sys_sendmsg /* 235 */ + .long sys_recvmsg + /* Broken-out IPC family (maintain backwards compatibility in syscall + numbering with 2.4) */ + .long sys_semop + .long sys_semget + .long sys_semctl + .long sys_msgsnd /* 240 */ + .long sys_msgrcv + .long sys_msgget + .long sys_msgctl + .long sys_shmatcall + .long sys_shmdt /* 245 */ + .long sys_shmget + .long sys_shmctl + /* Rest of syscalls listed in 2.4 i386 unistd.h */ + .long sys_getdents64 + .long sys_fcntl64 + .long sys_ni_syscall /* 250 reserved for TUX */ + .long sys_ni_syscall /* Reserved for Security */ + .long sys_gettid + .long sys_readahead + .long sys_setxattr + .long sys_lsetxattr /* 255 */ + .long sys_fsetxattr + .long sys_getxattr + .long sys_lgetxattr + .long sys_fgetxattr + .long sys_listxattr /* 260 */ + .long sys_llistxattr + .long sys_flistxattr + .long sys_removexattr + .long sys_lremovexattr + .long sys_fremovexattr /* 265 */ + .long sys_tkill + .long sys_sendfile64 + .long sys_futex + .long sys_sched_setaffinity + .long sys_sched_getaffinity /* 270 */ + .long sys_ni_syscall + .long sys_ni_syscall + .long sys_io_setup + .long sys_io_destroy + .long sys_io_getevents /* 275 */ + .long sys_io_submit + .long sys_io_cancel + .long sys_fadvise64 + .long sys_ni_syscall + .long sys_exit_group /* 280 */ + /* Rest of new 2.6 syscalls */ + .long sys_lookup_dcookie + .long sys_epoll_create + .long sys_epoll_ctl + .long sys_epoll_wait + .long sys_remap_file_pages /* 285 */ + .long sys_set_tid_address + .long sys_timer_create + .long sys_timer_settime + .long sys_timer_gettime + .long sys_timer_getoverrun /* 290 */ + .long sys_timer_delete + .long sys_clock_settime + .long sys_clock_gettime + .long sys_clock_getres + .long sys_clock_nanosleep /* 295 */ + .long sys_statfs64 + .long sys_fstatfs64 + .long sys_tgkill + .long sys_utimes + .long sys_fadvise64_64 /* 300 */ + .long sys_ni_syscall /* Reserved for vserver */ + .long sys_ni_syscall /* Reserved for mbind */ + .long sys_ni_syscall /* get_mempolicy */ + .long sys_ni_syscall /* set_mempolicy */ + .long sys_mq_open /* 305 */ + .long sys_mq_unlink + .long sys_mq_timedsend + .long sys_mq_timedreceive + .long sys_mq_notify + .long sys_mq_getsetattr /* 310 */ + .long sys_ni_syscall /* Reserved for kexec */ + .long sys_waitid + .long sys_add_key + .long sys_request_key + .long sys_keyctl /* 315 */ + diff --git a/arch/sh64/kernel/time.c b/arch/sh64/kernel/time.c new file mode 100644 index 0000000..6c84da3 --- /dev/null +++ b/arch/sh64/kernel/time.c @@ -0,0 +1,610 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/time.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003, 2004 Paul Mundt + * Copyright (C) 2003 Richard Curnow + * + * Original TMU/RTC code taken from sh version. + * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka + * Some code taken from i386 version. + * Copyright (C) 1991, 1992, 1995 Linus Torvalds + */ + +#include <linux/config.h> +#include <linux/errno.h> +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/time.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/profile.h> +#include <linux/smp.h> + +#include <asm/registers.h> /* required by inline __asm__ stmt. */ + +#include <asm/processor.h> +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/delay.h> + +#include <linux/timex.h> +#include <linux/irq.h> +#include <asm/hardware.h> + +#define TMU_TOCR_INIT 0x00 +#define TMU0_TCR_INIT 0x0020 +#define TMU_TSTR_INIT 1 +#define TMU_TSTR_OFF 0 + +/* RCR1 Bits */ +#define RCR1_CF 0x80 /* Carry Flag */ +#define RCR1_CIE 0x10 /* Carry Interrupt Enable */ +#define RCR1_AIE 0x08 /* Alarm Interrupt Enable */ +#define RCR1_AF 0x01 /* Alarm Flag */ + +/* RCR2 Bits */ +#define RCR2_PEF 0x80 /* PEriodic interrupt Flag */ +#define RCR2_PESMASK 0x70 /* Periodic interrupt Set */ +#define RCR2_RTCEN 0x08 /* ENable RTC */ +#define RCR2_ADJ 0x04 /* ADJustment (30-second) */ +#define RCR2_RESET 0x02 /* Reset bit */ +#define RCR2_START 0x01 /* Start bit */ + +/* Clock, Power and Reset Controller */ +#define CPRC_BLOCK_OFF 0x01010000 +#define CPRC_BASE PHYS_PERIPHERAL_BLOCK + CPRC_BLOCK_OFF + +#define FRQCR (cprc_base+0x0) +#define WTCSR (cprc_base+0x0018) +#define STBCR (cprc_base+0x0030) + +/* Time Management Unit */ +#define TMU_BLOCK_OFF 0x01020000 +#define TMU_BASE PHYS_PERIPHERAL_BLOCK + TMU_BLOCK_OFF +#define TMU0_BASE tmu_base + 0x8 + (0xc * 0x0) +#define TMU1_BASE tmu_base + 0x8 + (0xc * 0x1) +#define TMU2_BASE tmu_base + 0x8 + (0xc * 0x2) + +#define TMU_TOCR tmu_base+0x0 /* Byte access */ +#define TMU_TSTR tmu_base+0x4 /* Byte access */ + +#define TMU0_TCOR TMU0_BASE+0x0 /* Long access */ +#define TMU0_TCNT TMU0_BASE+0x4 /* Long access */ +#define TMU0_TCR TMU0_BASE+0x8 /* Word access */ + +/* Real Time Clock */ +#define RTC_BLOCK_OFF 0x01040000 +#define RTC_BASE PHYS_PERIPHERAL_BLOCK + RTC_BLOCK_OFF + +#define R64CNT rtc_base+0x00 +#define RSECCNT rtc_base+0x04 +#define RMINCNT rtc_base+0x08 +#define RHRCNT rtc_base+0x0c +#define RWKCNT rtc_base+0x10 +#define RDAYCNT rtc_base+0x14 +#define RMONCNT rtc_base+0x18 +#define RYRCNT rtc_base+0x1c /* 16bit */ +#define RSECAR rtc_base+0x20 +#define RMINAR rtc_base+0x24 +#define RHRAR rtc_base+0x28 +#define RWKAR rtc_base+0x2c +#define RDAYAR rtc_base+0x30 +#define RMONAR rtc_base+0x34 +#define RCR1 rtc_base+0x38 +#define RCR2 rtc_base+0x3c + +#ifndef BCD_TO_BIN +#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10) +#endif + +#ifndef BIN_TO_BCD +#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10) +#endif + +#define TICK_SIZE (tick_nsec / 1000) + +extern unsigned long wall_jiffies; + +u64 jiffies_64 = INITIAL_JIFFIES; + +static unsigned long tmu_base, rtc_base; +unsigned long cprc_base; + +/* Variables to allow interpolation of time of day to resolution better than a + * jiffy. */ + +/* This is effectively protected by xtime_lock */ +static unsigned long ctc_last_interrupt; +static unsigned long long usecs_per_jiffy = 1000000/HZ; /* Approximation */ + +#define CTC_JIFFY_SCALE_SHIFT 40 + +/* 2**CTC_JIFFY_SCALE_SHIFT / ctc_ticks_per_jiffy */ +static unsigned long long scaled_recip_ctc_ticks_per_jiffy; + +/* Estimate number of microseconds that have elapsed since the last timer tick, + by scaling the delta that has occured in the CTC register. + + WARNING WARNING WARNING : This algorithm relies on the CTC decrementing at + the CPU clock rate. If the CPU sleeps, the CTC stops counting. Bear this + in mind if enabling SLEEP_WORKS in process.c. In that case, this algorithm + probably needs to use TMU.TCNT0 instead. This will work even if the CPU is + sleeping, though will be coarser. + + FIXME : What if usecs_per_tick is moving around too much, e.g. if an adjtime + is running or if the freq or tick arguments of adjtimex are modified after + we have calibrated the scaling factor? This will result in either a jump at + the end of a tick period, or a wrap backwards at the start of the next one, + if the application is reading the time of day often enough. I think we + ought to do better than this. For this reason, usecs_per_jiffy is left + separated out in the calculation below. This allows some future hook into + the adjtime-related stuff in kernel/timer.c to remove this hazard. + +*/ + +static unsigned long usecs_since_tick(void) +{ + unsigned long long current_ctc; + long ctc_ticks_since_interrupt; + unsigned long long ull_ctc_ticks_since_interrupt; + unsigned long result; + + unsigned long long mul1_out; + unsigned long long mul1_out_high; + unsigned long long mul2_out_low, mul2_out_high; + + /* Read CTC register */ + asm ("getcon cr62, %0" : "=r" (current_ctc)); + /* Note, the CTC counts down on each CPU clock, not up. + Note(2), use long type to get correct wraparound arithmetic when + the counter crosses zero. */ + ctc_ticks_since_interrupt = (long) ctc_last_interrupt - (long) current_ctc; + ull_ctc_ticks_since_interrupt = (unsigned long long) ctc_ticks_since_interrupt; + + /* Inline assembly to do 32x32x32->64 multiplier */ + asm volatile ("mulu.l %1, %2, %0" : + "=r" (mul1_out) : + "r" (ull_ctc_ticks_since_interrupt), "r" (usecs_per_jiffy)); + + mul1_out_high = mul1_out >> 32; + + asm volatile ("mulu.l %1, %2, %0" : + "=r" (mul2_out_low) : + "r" (mul1_out), "r" (scaled_recip_ctc_ticks_per_jiffy)); + +#if 1 + asm volatile ("mulu.l %1, %2, %0" : + "=r" (mul2_out_high) : + "r" (mul1_out_high), "r" (scaled_recip_ctc_ticks_per_jiffy)); +#endif + + result = (unsigned long) (((mul2_out_high << 32) + mul2_out_low) >> CTC_JIFFY_SCALE_SHIFT); + + return result; +} + +void do_gettimeofday(struct timeval *tv) +{ + unsigned long flags; + unsigned long seq; + unsigned long usec, sec; + + do { + seq = read_seqbegin_irqsave(&xtime_lock, flags); + usec = usecs_since_tick(); + { + unsigned long lost = jiffies - wall_jiffies; + + if (lost) + usec += lost * (1000000 / HZ); + } + + sec = xtime.tv_sec; + usec += xtime.tv_nsec / 1000; + } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); + + while (usec >= 1000000) { + usec -= 1000000; + sec++; + } + + tv->tv_sec = sec; + tv->tv_usec = usec; +} + +int do_settimeofday(struct timespec *tv) +{ + time_t wtm_sec, sec = tv->tv_sec; + long wtm_nsec, nsec = tv->tv_nsec; + + if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC) + return -EINVAL; + + write_seqlock_irq(&xtime_lock); + /* + * This is revolting. We need to set "xtime" correctly. However, the + * value in this location is the value at the most recent update of + * wall time. Discover what correction gettimeofday() would have + * made, and then undo it! + */ + nsec -= 1000 * (usecs_since_tick() + + (jiffies - wall_jiffies) * (1000000 / HZ)); + + wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec); + wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec); + + set_normalized_timespec(&xtime, sec, nsec); + set_normalized_timespec(&wall_to_monotonic, wtm_sec, wtm_nsec); + + time_adjust = 0; /* stop active adjtime() */ + time_status |= STA_UNSYNC; + time_maxerror = NTP_PHASE_LIMIT; + time_esterror = NTP_PHASE_LIMIT; + write_sequnlock_irq(&xtime_lock); + clock_was_set(); + + return 0; +} + +static int set_rtc_time(unsigned long nowtime) +{ + int retval = 0; + int real_seconds, real_minutes, cmos_minutes; + + ctrl_outb(RCR2_RESET, RCR2); /* Reset pre-scaler & stop RTC */ + + cmos_minutes = ctrl_inb(RMINCNT); + BCD_TO_BIN(cmos_minutes); + + /* + * since we're only adjusting minutes and seconds, + * don't interfere with hour overflow. This avoids + * messing with unknown time zones but requires your + * RTC not to be off by more than 15 minutes + */ + real_seconds = nowtime % 60; + real_minutes = nowtime / 60; + if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1) + real_minutes += 30; /* correct for half hour time zone */ + real_minutes %= 60; + + if (abs(real_minutes - cmos_minutes) < 30) { + BIN_TO_BCD(real_seconds); + BIN_TO_BCD(real_minutes); + ctrl_outb(real_seconds, RSECCNT); + ctrl_outb(real_minutes, RMINCNT); + } else { + printk(KERN_WARNING + "set_rtc_time: can't update from %d to %d\n", + cmos_minutes, real_minutes); + retval = -1; + } + + ctrl_outb(RCR2_RTCEN|RCR2_START, RCR2); /* Start RTC */ + + return retval; +} + +/* last time the RTC clock got updated */ +static long last_rtc_update = 0; + +/* + * timer_interrupt() needs to keep up the real-time clock, + * as well as call the "do_timer()" routine every clocktick + */ +static inline void do_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + unsigned long long current_ctc; + asm ("getcon cr62, %0" : "=r" (current_ctc)); + ctc_last_interrupt = (unsigned long) current_ctc; + + do_timer(regs); +#ifndef CONFIG_SMP + update_process_times(user_mode(regs)); +#endif + profile_tick(CPU_PROFILING, regs); + +#ifdef CONFIG_HEARTBEAT + { + extern void heartbeat(void); + + heartbeat(); + } +#endif + + /* + * If we have an externally synchronized Linux clock, then update + * RTC clock accordingly every ~11 minutes. Set_rtc_mmss() has to be + * called as close as possible to 500 ms before the new second starts. + */ + if ((time_status & STA_UNSYNC) == 0 && + xtime.tv_sec > last_rtc_update + 660 && + (xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 && + (xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) { + if (set_rtc_time(xtime.tv_sec) == 0) + last_rtc_update = xtime.tv_sec; + else + last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */ + } +} + +/* + * This is the same as the above, except we _also_ save the current + * Time Stamp Counter value at the time of the timer interrupt, so that + * we later on can estimate the time of day more exactly. + */ +static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + unsigned long timer_status; + + /* Clear UNF bit */ + timer_status = ctrl_inw(TMU0_TCR); + timer_status &= ~0x100; + ctrl_outw(timer_status, TMU0_TCR); + + /* + * Here we are in the timer irq handler. We just have irqs locally + * disabled but we don't know if the timer_bh is running on the other + * CPU. We need to avoid to SMP race with it. NOTE: we don' t need + * the irq version of write_lock because as just said we have irq + * locally disabled. -arca + */ + write_lock(&xtime_lock); + do_timer_interrupt(irq, NULL, regs); + write_unlock(&xtime_lock); + + return IRQ_HANDLED; +} + +static unsigned long get_rtc_time(void) +{ + unsigned int sec, min, hr, wk, day, mon, yr, yr100; + + again: + do { + ctrl_outb(0, RCR1); /* Clear CF-bit */ + sec = ctrl_inb(RSECCNT); + min = ctrl_inb(RMINCNT); + hr = ctrl_inb(RHRCNT); + wk = ctrl_inb(RWKCNT); + day = ctrl_inb(RDAYCNT); + mon = ctrl_inb(RMONCNT); + yr = ctrl_inw(RYRCNT); + yr100 = (yr >> 8); + yr &= 0xff; + } while ((ctrl_inb(RCR1) & RCR1_CF) != 0); + + BCD_TO_BIN(yr100); + BCD_TO_BIN(yr); + BCD_TO_BIN(mon); + BCD_TO_BIN(day); + BCD_TO_BIN(hr); + BCD_TO_BIN(min); + BCD_TO_BIN(sec); + + if (yr > 99 || mon < 1 || mon > 12 || day > 31 || day < 1 || + hr > 23 || min > 59 || sec > 59) { + printk(KERN_ERR + "SH RTC: invalid value, resetting to 1 Jan 2000\n"); + ctrl_outb(RCR2_RESET, RCR2); /* Reset & Stop */ + ctrl_outb(0, RSECCNT); + ctrl_outb(0, RMINCNT); + ctrl_outb(0, RHRCNT); + ctrl_outb(6, RWKCNT); + ctrl_outb(1, RDAYCNT); + ctrl_outb(1, RMONCNT); + ctrl_outw(0x2000, RYRCNT); + ctrl_outb(RCR2_RTCEN|RCR2_START, RCR2); /* Start */ + goto again; + } + + return mktime(yr100 * 100 + yr, mon, day, hr, min, sec); +} + +static __init unsigned int get_cpu_hz(void) +{ + unsigned int count; + unsigned long __dummy; + unsigned long ctc_val_init, ctc_val; + + /* + ** Regardless the toolchain, force the compiler to use the + ** arbitrary register r3 as a clock tick counter. + ** NOTE: r3 must be in accordance with rtc_interrupt() + */ + register unsigned long long __rtc_irq_flag __asm__ ("r3"); + + local_irq_enable(); + do {} while (ctrl_inb(R64CNT) != 0); + ctrl_outb(RCR1_CIE, RCR1); /* Enable carry interrupt */ + + /* + * r3 is arbitrary. CDC does not support "=z". + */ + ctc_val_init = 0xffffffff; + ctc_val = ctc_val_init; + + asm volatile("gettr tr0, %1\n\t" + "putcon %0, " __CTC "\n\t" + "and %2, r63, %2\n\t" + "pta $+4, tr0\n\t" + "beq/l %2, r63, tr0\n\t" + "ptabs %1, tr0\n\t" + "getcon " __CTC ", %0\n\t" + : "=r"(ctc_val), "=r" (__dummy), "=r" (__rtc_irq_flag) + : "0" (0)); + local_irq_disable(); + /* + * SH-3: + * CPU clock = 4 stages * loop + * tst rm,rm if id ex + * bt/s 1b if id ex + * add #1,rd if id ex + * (if) pipe line stole + * tst rm,rm if id ex + * .... + * + * + * SH-4: + * CPU clock = 6 stages * loop + * I don't know why. + * .... + * + * SH-5: + * Use CTC register to count. This approach returns the right value + * even if the I-cache is disabled (e.g. whilst debugging.) + * + */ + + count = ctc_val_init - ctc_val; /* CTC counts down */ + +#if defined (CONFIG_SH_SIMULATOR) + /* + * Let's pretend we are a 5MHz SH-5 to avoid a too + * little timer interval. Also to keep delay + * calibration within a reasonable time. + */ + return 5000000; +#else + /* + * This really is count by the number of clock cycles + * by the ratio between a complete R64CNT + * wrap-around (128) and CUI interrupt being raised (64). + */ + return count*2; +#endif +} + +static irqreturn_t rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + ctrl_outb(0, RCR1); /* Disable Carry Interrupts */ + regs->regs[3] = 1; /* Using r3 */ + + return IRQ_HANDLED; +} + +static struct irqaction irq0 = { timer_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "timer", NULL, NULL}; +static struct irqaction irq1 = { rtc_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "rtc", NULL, NULL}; + +void __init time_init(void) +{ + unsigned int cpu_clock, master_clock, bus_clock, module_clock; + unsigned long interval; + unsigned long frqcr, ifc, pfc; + static int ifc_table[] = { 2, 4, 6, 8, 10, 12, 16, 24 }; +#define bfc_table ifc_table /* Same */ +#define pfc_table ifc_table /* Same */ + + tmu_base = onchip_remap(TMU_BASE, 1024, "TMU"); + if (!tmu_base) { + panic("Unable to remap TMU\n"); + } + + rtc_base = onchip_remap(RTC_BASE, 1024, "RTC"); + if (!rtc_base) { + panic("Unable to remap RTC\n"); + } + + cprc_base = onchip_remap(CPRC_BASE, 1024, "CPRC"); + if (!cprc_base) { + panic("Unable to remap CPRC\n"); + } + + xtime.tv_sec = get_rtc_time(); + xtime.tv_nsec = 0; + + setup_irq(TIMER_IRQ, &irq0); + setup_irq(RTC_IRQ, &irq1); + + /* Check how fast it is.. */ + cpu_clock = get_cpu_hz(); + + /* Note careful order of operations to maintain reasonable precision and avoid overflow. */ + scaled_recip_ctc_ticks_per_jiffy = ((1ULL << CTC_JIFFY_SCALE_SHIFT) / (unsigned long long)(cpu_clock / HZ)); + + disable_irq(RTC_IRQ); + + printk("CPU clock: %d.%02dMHz\n", + (cpu_clock / 1000000), (cpu_clock % 1000000)/10000); + { + unsigned short bfc; + frqcr = ctrl_inl(FRQCR); + ifc = ifc_table[(frqcr>> 6) & 0x0007]; + bfc = bfc_table[(frqcr>> 3) & 0x0007]; + pfc = pfc_table[(frqcr>> 12) & 0x0007]; + master_clock = cpu_clock * ifc; + bus_clock = master_clock/bfc; + } + + printk("Bus clock: %d.%02dMHz\n", + (bus_clock/1000000), (bus_clock % 1000000)/10000); + module_clock = master_clock/pfc; + printk("Module clock: %d.%02dMHz\n", + (module_clock/1000000), (module_clock % 1000000)/10000); + interval = (module_clock/(HZ*4)); + + printk("Interval = %ld\n", interval); + + current_cpu_data.cpu_clock = cpu_clock; + current_cpu_data.master_clock = master_clock; + current_cpu_data.bus_clock = bus_clock; + current_cpu_data.module_clock = module_clock; + + /* Start TMU0 */ + ctrl_outb(TMU_TSTR_OFF, TMU_TSTR); + ctrl_outb(TMU_TOCR_INIT, TMU_TOCR); + ctrl_outw(TMU0_TCR_INIT, TMU0_TCR); + ctrl_outl(interval, TMU0_TCOR); + ctrl_outl(interval, TMU0_TCNT); + ctrl_outb(TMU_TSTR_INIT, TMU_TSTR); +} + +void enter_deep_standby(void) +{ + /* Disable watchdog timer */ + ctrl_outl(0xa5000000, WTCSR); + /* Configure deep standby on sleep */ + ctrl_outl(0x03, STBCR); + +#ifdef CONFIG_SH_ALPHANUMERIC + { + extern void mach_alphanum(int position, unsigned char value); + extern void mach_alphanum_brightness(int setting); + char halted[] = "Halted. "; + int i; + mach_alphanum_brightness(6); /* dimmest setting above off */ + for (i=0; i<8; i++) { + mach_alphanum(i, halted[i]); + } + asm __volatile__ ("synco"); + } +#endif + + asm __volatile__ ("sleep"); + asm __volatile__ ("synci"); + asm __volatile__ ("nop"); + asm __volatile__ ("nop"); + asm __volatile__ ("nop"); + asm __volatile__ ("nop"); + panic("Unexpected wakeup!\n"); +} + +/* + * Scheduler clock - returns current time in nanosec units. + */ +unsigned long long sched_clock(void) +{ + return (unsigned long long)jiffies * (1000000000 / HZ); +} + diff --git a/arch/sh64/kernel/traps.c b/arch/sh64/kernel/traps.c new file mode 100644 index 0000000..224b7f5 --- /dev/null +++ b/arch/sh64/kernel/traps.c @@ -0,0 +1,961 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/traps.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003, 2004 Paul Mundt + * Copyright (C) 2003, 2004 Richard Curnow + * + */ + +/* + * 'Traps.c' handles hardware traps and faults after we have saved some + * state in 'entry.S'. + */ +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/ptrace.h> +#include <linux/timer.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/spinlock.h> +#include <linux/kallsyms.h> +#include <linux/interrupt.h> +#include <linux/sysctl.h> +#include <linux/module.h> + +#include <asm/system.h> +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/atomic.h> +#include <asm/processor.h> +#include <asm/pgtable.h> + +#undef DEBUG_EXCEPTION +#ifdef DEBUG_EXCEPTION +/* implemented in ../lib/dbg.c */ +extern void show_excp_regs(char *fname, int trapnr, int signr, + struct pt_regs *regs); +#else +#define show_excp_regs(a, b, c, d) +#endif + +static void do_unhandled_exception(int trapnr, int signr, char *str, char *fn_name, + unsigned long error_code, struct pt_regs *regs, struct task_struct *tsk); + +#define DO_ERROR(trapnr, signr, str, name, tsk) \ +asmlinkage void do_##name(unsigned long error_code, struct pt_regs *regs) \ +{ \ + do_unhandled_exception(trapnr, signr, str, __stringify(name), error_code, regs, current); \ +} + +spinlock_t die_lock; + +void die(const char * str, struct pt_regs * regs, long err) +{ + console_verbose(); + spin_lock_irq(&die_lock); + printk("%s: %lx\n", str, (err & 0xffffff)); + show_regs(regs); + spin_unlock_irq(&die_lock); + do_exit(SIGSEGV); +} + +static inline void die_if_kernel(const char * str, struct pt_regs * regs, long err) +{ + if (!user_mode(regs)) + die(str, regs, err); +} + +static void die_if_no_fixup(const char * str, struct pt_regs * regs, long err) +{ + if (!user_mode(regs)) { + const struct exception_table_entry *fixup; + fixup = search_exception_tables(regs->pc); + if (fixup) { + regs->pc = fixup->fixup; + return; + } + die(str, regs, err); + } +} + +DO_ERROR(13, SIGILL, "illegal slot instruction", illegal_slot_inst, current) +DO_ERROR(87, SIGSEGV, "address error (exec)", address_error_exec, current) + + +/* Implement misaligned load/store handling for kernel (and optionally for user + mode too). Limitation : only SHmedia mode code is handled - there is no + handling at all for misaligned accesses occurring in SHcompact code yet. */ + +static int misaligned_fixup(struct pt_regs *regs); + +asmlinkage void do_address_error_load(unsigned long error_code, struct pt_regs *regs) +{ + if (misaligned_fixup(regs) < 0) { + do_unhandled_exception(7, SIGSEGV, "address error(load)", + "do_address_error_load", + error_code, regs, current); + } + return; +} + +asmlinkage void do_address_error_store(unsigned long error_code, struct pt_regs *regs) +{ + if (misaligned_fixup(regs) < 0) { + do_unhandled_exception(8, SIGSEGV, "address error(store)", + "do_address_error_store", + error_code, regs, current); + } + return; +} + +#if defined(CONFIG_SH64_ID2815_WORKAROUND) + +#define OPCODE_INVALID 0 +#define OPCODE_USER_VALID 1 +#define OPCODE_PRIV_VALID 2 + +/* getcon/putcon - requires checking which control register is referenced. */ +#define OPCODE_CTRL_REG 3 + +/* Table of valid opcodes for SHmedia mode. + Form a 10-bit value by concatenating the major/minor opcodes i.e. + opcode[31:26,20:16]. The 6 MSBs of this value index into the following + array. The 4 LSBs select the bit-pair in the entry (bits 1:0 correspond to + LSBs==4'b0000 etc). */ +static unsigned long shmedia_opcode_table[64] = { + 0x55554044,0x54445055,0x15141514,0x14541414,0x00000000,0x10001000,0x01110055,0x04050015, + 0x00000444,0xc0000000,0x44545515,0x40405555,0x55550015,0x10005555,0x55555505,0x04050000, + 0x00000555,0x00000404,0x00040445,0x15151414,0x00000000,0x00000000,0x00000000,0x00000000, + 0x00000055,0x40404444,0x00000404,0xc0009495,0x00000000,0x00000000,0x00000000,0x00000000, + 0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555, + 0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555, + 0x80005050,0x04005055,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555,0x55555555, + 0x81055554,0x00000404,0x55555555,0x55555555,0x00000000,0x00000000,0x00000000,0x00000000 +}; + +void do_reserved_inst(unsigned long error_code, struct pt_regs *regs) +{ + /* Workaround SH5-101 cut2 silicon defect #2815 : + in some situations, inter-mode branches from SHcompact -> SHmedia + which should take ITLBMISS or EXECPROT exceptions at the target + falsely take RESINST at the target instead. */ + + unsigned long opcode = 0x6ff4fff0; /* guaranteed reserved opcode */ + unsigned long pc, aligned_pc; + int get_user_error; + int trapnr = 12; + int signr = SIGILL; + char *exception_name = "reserved_instruction"; + + pc = regs->pc; + if ((pc & 3) == 1) { + /* SHmedia : check for defect. This requires executable vmas + to be readable too. */ + aligned_pc = pc & ~3; + if (!access_ok(VERIFY_READ, aligned_pc, sizeof(unsigned long))) { + get_user_error = -EFAULT; + } else { + get_user_error = __get_user(opcode, (unsigned long *)aligned_pc); + } + if (get_user_error >= 0) { + unsigned long index, shift; + unsigned long major, minor, combined; + unsigned long reserved_field; + reserved_field = opcode & 0xf; /* These bits are currently reserved as zero in all valid opcodes */ + major = (opcode >> 26) & 0x3f; + minor = (opcode >> 16) & 0xf; + combined = (major << 4) | minor; + index = major; + shift = minor << 1; + if (reserved_field == 0) { + int opcode_state = (shmedia_opcode_table[index] >> shift) & 0x3; + switch (opcode_state) { + case OPCODE_INVALID: + /* Trap. */ + break; + case OPCODE_USER_VALID: + /* Restart the instruction : the branch to the instruction will now be from an RTE + not from SHcompact so the silicon defect won't be triggered. */ + return; + case OPCODE_PRIV_VALID: + if (!user_mode(regs)) { + /* Should only ever get here if a module has + SHcompact code inside it. If so, the same fix up is needed. */ + return; /* same reason */ + } + /* Otherwise, user mode trying to execute a privileged instruction - + fall through to trap. */ + break; + case OPCODE_CTRL_REG: + /* If in privileged mode, return as above. */ + if (!user_mode(regs)) return; + /* In user mode ... */ + if (combined == 0x9f) { /* GETCON */ + unsigned long regno = (opcode >> 20) & 0x3f; + if (regno >= 62) { + return; + } + /* Otherwise, reserved or privileged control register, => trap */ + } else if (combined == 0x1bf) { /* PUTCON */ + unsigned long regno = (opcode >> 4) & 0x3f; + if (regno >= 62) { + return; + } + /* Otherwise, reserved or privileged control register, => trap */ + } else { + /* Trap */ + } + break; + default: + /* Fall through to trap. */ + break; + } + } + /* fall through to normal resinst processing */ + } else { + /* Error trying to read opcode. This typically means a + real fault, not a RESINST any more. So change the + codes. */ + trapnr = 87; + exception_name = "address error (exec)"; + signr = SIGSEGV; + } + } + + do_unhandled_exception(trapnr, signr, exception_name, "do_reserved_inst", error_code, regs, current); +} + +#else /* CONFIG_SH64_ID2815_WORKAROUND */ + +/* If the workaround isn't needed, this is just a straightforward reserved + instruction */ +DO_ERROR(12, SIGILL, "reserved instruction", reserved_inst, current) + +#endif /* CONFIG_SH64_ID2815_WORKAROUND */ + + +#include <asm/system.h> + +/* Called with interrupts disabled */ +asmlinkage void do_exception_error(unsigned long ex, struct pt_regs *regs) +{ + PLS(); + show_excp_regs(__FUNCTION__, -1, -1, regs); + die_if_kernel("exception", regs, ex); +} + +int do_unknown_trapa(unsigned long scId, struct pt_regs *regs) +{ + /* Syscall debug */ + printk("System call ID error: [0x1#args:8 #syscall:16 0x%lx]\n", scId); + + die_if_kernel("unknown trapa", regs, scId); + + return -ENOSYS; +} + +void show_stack(struct task_struct *tsk, unsigned long *sp) +{ +#ifdef CONFIG_KALLSYMS + extern void sh64_unwind(struct pt_regs *regs); + struct pt_regs *regs; + + regs = tsk ? tsk->thread.kregs : NULL; + + sh64_unwind(regs); +#else + printk(KERN_ERR "Can't backtrace on sh64 without CONFIG_KALLSYMS\n"); +#endif +} + +void show_task(unsigned long *sp) +{ + show_stack(NULL, sp); +} + +void dump_stack(void) +{ + show_task(NULL); +} +/* Needed by any user of WARN_ON in view of the defn in include/asm-sh/bug.h */ +EXPORT_SYMBOL(dump_stack); + +static void do_unhandled_exception(int trapnr, int signr, char *str, char *fn_name, + unsigned long error_code, struct pt_regs *regs, struct task_struct *tsk) +{ + show_excp_regs(fn_name, trapnr, signr, regs); + tsk->thread.error_code = error_code; + tsk->thread.trap_no = trapnr; + + if (user_mode(regs)) + force_sig(signr, tsk); + + die_if_no_fixup(str, regs, error_code); +} + +static int read_opcode(unsigned long long pc, unsigned long *result_opcode, int from_user_mode) +{ + int get_user_error; + unsigned long aligned_pc; + unsigned long opcode; + + if ((pc & 3) == 1) { + /* SHmedia */ + aligned_pc = pc & ~3; + if (from_user_mode) { + if (!access_ok(VERIFY_READ, aligned_pc, sizeof(unsigned long))) { + get_user_error = -EFAULT; + } else { + get_user_error = __get_user(opcode, (unsigned long *)aligned_pc); + *result_opcode = opcode; + } + return get_user_error; + } else { + /* If the fault was in the kernel, we can either read + * this directly, or if not, we fault. + */ + *result_opcode = *(unsigned long *) aligned_pc; + return 0; + } + } else if ((pc & 1) == 0) { + /* SHcompact */ + /* TODO : provide handling for this. We don't really support + user-mode SHcompact yet, and for a kernel fault, this would + have to come from a module built for SHcompact. */ + return -EFAULT; + } else { + /* misaligned */ + return -EFAULT; + } +} + +static int address_is_sign_extended(__u64 a) +{ + __u64 b; +#if (NEFF == 32) + b = (__u64)(__s64)(__s32)(a & 0xffffffffUL); + return (b == a) ? 1 : 0; +#else +#error "Sign extend check only works for NEFF==32" +#endif +} + +static int generate_and_check_address(struct pt_regs *regs, + __u32 opcode, + int displacement_not_indexed, + int width_shift, + __u64 *address) +{ + /* return -1 for fault, 0 for OK */ + + __u64 base_address, addr; + int basereg; + + basereg = (opcode >> 20) & 0x3f; + base_address = regs->regs[basereg]; + if (displacement_not_indexed) { + __s64 displacement; + displacement = (opcode >> 10) & 0x3ff; + displacement = ((displacement << 54) >> 54); /* sign extend */ + addr = (__u64)((__s64)base_address + (displacement << width_shift)); + } else { + __u64 offset; + int offsetreg; + offsetreg = (opcode >> 10) & 0x3f; + offset = regs->regs[offsetreg]; + addr = base_address + offset; + } + + /* Check sign extended */ + if (!address_is_sign_extended(addr)) { + return -1; + } + +#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) + /* Check accessible. For misaligned access in the kernel, assume the + address is always accessible (and if not, just fault when the + load/store gets done.) */ + if (user_mode(regs)) { + if (addr >= TASK_SIZE) { + return -1; + } + /* Do access_ok check later - it depends on whether it's a load or a store. */ + } +#endif + + *address = addr; + return 0; +} + +/* Default value as for sh */ +#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) +static int user_mode_unaligned_fixup_count = 10; +static int user_mode_unaligned_fixup_enable = 1; +#endif + +static int kernel_mode_unaligned_fixup_count = 32; + +static void misaligned_kernel_word_load(__u64 address, int do_sign_extend, __u64 *result) +{ + unsigned short x; + unsigned char *p, *q; + p = (unsigned char *) (int) address; + q = (unsigned char *) &x; + q[0] = p[0]; + q[1] = p[1]; + + if (do_sign_extend) { + *result = (__u64)(__s64) *(short *) &x; + } else { + *result = (__u64) x; + } +} + +static void misaligned_kernel_word_store(__u64 address, __u64 value) +{ + unsigned short x; + unsigned char *p, *q; + p = (unsigned char *) (int) address; + q = (unsigned char *) &x; + + x = (__u16) value; + p[0] = q[0]; + p[1] = q[1]; +} + +static int misaligned_load(struct pt_regs *regs, + __u32 opcode, + int displacement_not_indexed, + int width_shift, + int do_sign_extend) +{ + /* Return -1 for a fault, 0 for OK */ + int error; + int destreg; + __u64 address; + + error = generate_and_check_address(regs, opcode, + displacement_not_indexed, width_shift, &address); + if (error < 0) { + return error; + } + + destreg = (opcode >> 4) & 0x3f; +#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) + if (user_mode(regs)) { + __u64 buffer; + + if (!access_ok(VERIFY_READ, (unsigned long) address, 1UL<<width_shift)) { + return -1; + } + + if (__copy_user(&buffer, (const void *)(int)address, (1 << width_shift)) > 0) { + return -1; /* fault */ + } + switch (width_shift) { + case 1: + if (do_sign_extend) { + regs->regs[destreg] = (__u64)(__s64) *(__s16 *) &buffer; + } else { + regs->regs[destreg] = (__u64) *(__u16 *) &buffer; + } + break; + case 2: + regs->regs[destreg] = (__u64)(__s64) *(__s32 *) &buffer; + break; + case 3: + regs->regs[destreg] = buffer; + break; + default: + printk("Unexpected width_shift %d in misaligned_load, PC=%08lx\n", + width_shift, (unsigned long) regs->pc); + break; + } + } else +#endif + { + /* kernel mode - we can take short cuts since if we fault, it's a genuine bug */ + __u64 lo, hi; + + switch (width_shift) { + case 1: + misaligned_kernel_word_load(address, do_sign_extend, ®s->regs[destreg]); + break; + case 2: + asm ("ldlo.l %1, 0, %0" : "=r" (lo) : "r" (address)); + asm ("ldhi.l %1, 3, %0" : "=r" (hi) : "r" (address)); + regs->regs[destreg] = lo | hi; + break; + case 3: + asm ("ldlo.q %1, 0, %0" : "=r" (lo) : "r" (address)); + asm ("ldhi.q %1, 7, %0" : "=r" (hi) : "r" (address)); + regs->regs[destreg] = lo | hi; + break; + + default: + printk("Unexpected width_shift %d in misaligned_load, PC=%08lx\n", + width_shift, (unsigned long) regs->pc); + break; + } + } + + return 0; + +} + +static int misaligned_store(struct pt_regs *regs, + __u32 opcode, + int displacement_not_indexed, + int width_shift) +{ + /* Return -1 for a fault, 0 for OK */ + int error; + int srcreg; + __u64 address; + + error = generate_and_check_address(regs, opcode, + displacement_not_indexed, width_shift, &address); + if (error < 0) { + return error; + } + + srcreg = (opcode >> 4) & 0x3f; +#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) + if (user_mode(regs)) { + __u64 buffer; + + if (!access_ok(VERIFY_WRITE, (unsigned long) address, 1UL<<width_shift)) { + return -1; + } + + switch (width_shift) { + case 1: + *(__u16 *) &buffer = (__u16) regs->regs[srcreg]; + break; + case 2: + *(__u32 *) &buffer = (__u32) regs->regs[srcreg]; + break; + case 3: + buffer = regs->regs[srcreg]; + break; + default: + printk("Unexpected width_shift %d in misaligned_store, PC=%08lx\n", + width_shift, (unsigned long) regs->pc); + break; + } + + if (__copy_user((void *)(int)address, &buffer, (1 << width_shift)) > 0) { + return -1; /* fault */ + } + } else +#endif + { + /* kernel mode - we can take short cuts since if we fault, it's a genuine bug */ + __u64 val = regs->regs[srcreg]; + + switch (width_shift) { + case 1: + misaligned_kernel_word_store(address, val); + break; + case 2: + asm ("stlo.l %1, 0, %0" : : "r" (val), "r" (address)); + asm ("sthi.l %1, 3, %0" : : "r" (val), "r" (address)); + break; + case 3: + asm ("stlo.q %1, 0, %0" : : "r" (val), "r" (address)); + asm ("sthi.q %1, 7, %0" : : "r" (val), "r" (address)); + break; + + default: + printk("Unexpected width_shift %d in misaligned_store, PC=%08lx\n", + width_shift, (unsigned long) regs->pc); + break; + } + } + + return 0; + +} + +#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) +/* Never need to fix up misaligned FPU accesses within the kernel since that's a real + error. */ +static int misaligned_fpu_load(struct pt_regs *regs, + __u32 opcode, + int displacement_not_indexed, + int width_shift, + int do_paired_load) +{ + /* Return -1 for a fault, 0 for OK */ + int error; + int destreg; + __u64 address; + + error = generate_and_check_address(regs, opcode, + displacement_not_indexed, width_shift, &address); + if (error < 0) { + return error; + } + + destreg = (opcode >> 4) & 0x3f; + if (user_mode(regs)) { + __u64 buffer; + __u32 buflo, bufhi; + + if (!access_ok(VERIFY_READ, (unsigned long) address, 1UL<<width_shift)) { + return -1; + } + + if (__copy_user(&buffer, (const void *)(int)address, (1 << width_shift)) > 0) { + return -1; /* fault */ + } + /* 'current' may be the current owner of the FPU state, so + context switch the registers into memory so they can be + indexed by register number. */ + if (last_task_used_math == current) { + grab_fpu(); + fpsave(¤t->thread.fpu.hard); + release_fpu(); + last_task_used_math = NULL; + regs->sr |= SR_FD; + } + + buflo = *(__u32*) &buffer; + bufhi = *(1 + (__u32*) &buffer); + + switch (width_shift) { + case 2: + current->thread.fpu.hard.fp_regs[destreg] = buflo; + break; + case 3: + if (do_paired_load) { + current->thread.fpu.hard.fp_regs[destreg] = buflo; + current->thread.fpu.hard.fp_regs[destreg+1] = bufhi; + } else { +#if defined(CONFIG_LITTLE_ENDIAN) + current->thread.fpu.hard.fp_regs[destreg] = bufhi; + current->thread.fpu.hard.fp_regs[destreg+1] = buflo; +#else + current->thread.fpu.hard.fp_regs[destreg] = buflo; + current->thread.fpu.hard.fp_regs[destreg+1] = bufhi; +#endif + } + break; + default: + printk("Unexpected width_shift %d in misaligned_fpu_load, PC=%08lx\n", + width_shift, (unsigned long) regs->pc); + break; + } + return 0; + } else { + die ("Misaligned FPU load inside kernel", regs, 0); + return -1; + } + + +} + +static int misaligned_fpu_store(struct pt_regs *regs, + __u32 opcode, + int displacement_not_indexed, + int width_shift, + int do_paired_load) +{ + /* Return -1 for a fault, 0 for OK */ + int error; + int srcreg; + __u64 address; + + error = generate_and_check_address(regs, opcode, + displacement_not_indexed, width_shift, &address); + if (error < 0) { + return error; + } + + srcreg = (opcode >> 4) & 0x3f; + if (user_mode(regs)) { + __u64 buffer; + /* Initialise these to NaNs. */ + __u32 buflo=0xffffffffUL, bufhi=0xffffffffUL; + + if (!access_ok(VERIFY_WRITE, (unsigned long) address, 1UL<<width_shift)) { + return -1; + } + + /* 'current' may be the current owner of the FPU state, so + context switch the registers into memory so they can be + indexed by register number. */ + if (last_task_used_math == current) { + grab_fpu(); + fpsave(¤t->thread.fpu.hard); + release_fpu(); + last_task_used_math = NULL; + regs->sr |= SR_FD; + } + + switch (width_shift) { + case 2: + buflo = current->thread.fpu.hard.fp_regs[srcreg]; + break; + case 3: + if (do_paired_load) { + buflo = current->thread.fpu.hard.fp_regs[srcreg]; + bufhi = current->thread.fpu.hard.fp_regs[srcreg+1]; + } else { +#if defined(CONFIG_LITTLE_ENDIAN) + bufhi = current->thread.fpu.hard.fp_regs[srcreg]; + buflo = current->thread.fpu.hard.fp_regs[srcreg+1]; +#else + buflo = current->thread.fpu.hard.fp_regs[srcreg]; + bufhi = current->thread.fpu.hard.fp_regs[srcreg+1]; +#endif + } + break; + default: + printk("Unexpected width_shift %d in misaligned_fpu_store, PC=%08lx\n", + width_shift, (unsigned long) regs->pc); + break; + } + + *(__u32*) &buffer = buflo; + *(1 + (__u32*) &buffer) = bufhi; + if (__copy_user((void *)(int)address, &buffer, (1 << width_shift)) > 0) { + return -1; /* fault */ + } + return 0; + } else { + die ("Misaligned FPU load inside kernel", regs, 0); + return -1; + } +} +#endif + +static int misaligned_fixup(struct pt_regs *regs) +{ + unsigned long opcode; + int error; + int major, minor; + +#if !defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) + /* Never fixup user mode misaligned accesses without this option enabled. */ + return -1; +#else + if (!user_mode_unaligned_fixup_enable) return -1; +#endif + + error = read_opcode(regs->pc, &opcode, user_mode(regs)); + if (error < 0) { + return error; + } + major = (opcode >> 26) & 0x3f; + minor = (opcode >> 16) & 0xf; + +#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) + if (user_mode(regs) && (user_mode_unaligned_fixup_count > 0)) { + --user_mode_unaligned_fixup_count; + /* Only do 'count' worth of these reports, to remove a potential DoS against syslog */ + printk("Fixing up unaligned userspace access in \"%s\" pid=%d pc=0x%08x ins=0x%08lx\n", + current->comm, current->pid, (__u32)regs->pc, opcode); + } else +#endif + if (!user_mode(regs) && (kernel_mode_unaligned_fixup_count > 0)) { + --kernel_mode_unaligned_fixup_count; + if (in_interrupt()) { + printk("Fixing up unaligned kernelspace access in interrupt pc=0x%08x ins=0x%08lx\n", + (__u32)regs->pc, opcode); + } else { + printk("Fixing up unaligned kernelspace access in \"%s\" pid=%d pc=0x%08x ins=0x%08lx\n", + current->comm, current->pid, (__u32)regs->pc, opcode); + } + } + + + switch (major) { + case (0x84>>2): /* LD.W */ + error = misaligned_load(regs, opcode, 1, 1, 1); + break; + case (0xb0>>2): /* LD.UW */ + error = misaligned_load(regs, opcode, 1, 1, 0); + break; + case (0x88>>2): /* LD.L */ + error = misaligned_load(regs, opcode, 1, 2, 1); + break; + case (0x8c>>2): /* LD.Q */ + error = misaligned_load(regs, opcode, 1, 3, 0); + break; + + case (0xa4>>2): /* ST.W */ + error = misaligned_store(regs, opcode, 1, 1); + break; + case (0xa8>>2): /* ST.L */ + error = misaligned_store(regs, opcode, 1, 2); + break; + case (0xac>>2): /* ST.Q */ + error = misaligned_store(regs, opcode, 1, 3); + break; + + case (0x40>>2): /* indexed loads */ + switch (minor) { + case 0x1: /* LDX.W */ + error = misaligned_load(regs, opcode, 0, 1, 1); + break; + case 0x5: /* LDX.UW */ + error = misaligned_load(regs, opcode, 0, 1, 0); + break; + case 0x2: /* LDX.L */ + error = misaligned_load(regs, opcode, 0, 2, 1); + break; + case 0x3: /* LDX.Q */ + error = misaligned_load(regs, opcode, 0, 3, 0); + break; + default: + error = -1; + break; + } + break; + + case (0x60>>2): /* indexed stores */ + switch (minor) { + case 0x1: /* STX.W */ + error = misaligned_store(regs, opcode, 0, 1); + break; + case 0x2: /* STX.L */ + error = misaligned_store(regs, opcode, 0, 2); + break; + case 0x3: /* STX.Q */ + error = misaligned_store(regs, opcode, 0, 3); + break; + default: + error = -1; + break; + } + break; + +#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) + case (0x94>>2): /* FLD.S */ + error = misaligned_fpu_load(regs, opcode, 1, 2, 0); + break; + case (0x98>>2): /* FLD.P */ + error = misaligned_fpu_load(regs, opcode, 1, 3, 1); + break; + case (0x9c>>2): /* FLD.D */ + error = misaligned_fpu_load(regs, opcode, 1, 3, 0); + break; + case (0x1c>>2): /* floating indexed loads */ + switch (minor) { + case 0x8: /* FLDX.S */ + error = misaligned_fpu_load(regs, opcode, 0, 2, 0); + break; + case 0xd: /* FLDX.P */ + error = misaligned_fpu_load(regs, opcode, 0, 3, 1); + break; + case 0x9: /* FLDX.D */ + error = misaligned_fpu_load(regs, opcode, 0, 3, 0); + break; + default: + error = -1; + break; + } + break; + case (0xb4>>2): /* FLD.S */ + error = misaligned_fpu_store(regs, opcode, 1, 2, 0); + break; + case (0xb8>>2): /* FLD.P */ + error = misaligned_fpu_store(regs, opcode, 1, 3, 1); + break; + case (0xbc>>2): /* FLD.D */ + error = misaligned_fpu_store(regs, opcode, 1, 3, 0); + break; + case (0x3c>>2): /* floating indexed stores */ + switch (minor) { + case 0x8: /* FSTX.S */ + error = misaligned_fpu_store(regs, opcode, 0, 2, 0); + break; + case 0xd: /* FSTX.P */ + error = misaligned_fpu_store(regs, opcode, 0, 3, 1); + break; + case 0x9: /* FSTX.D */ + error = misaligned_fpu_store(regs, opcode, 0, 3, 0); + break; + default: + error = -1; + break; + } + break; +#endif + + default: + /* Fault */ + error = -1; + break; + } + + if (error < 0) { + return error; + } else { + regs->pc += 4; /* Skip the instruction that's just been emulated */ + return 0; + } + +} + +static ctl_table unaligned_table[] = { + {1, "kernel_reports", &kernel_mode_unaligned_fixup_count, + sizeof(int), 0644, NULL, &proc_dointvec}, +#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) + {2, "user_reports", &user_mode_unaligned_fixup_count, + sizeof(int), 0644, NULL, &proc_dointvec}, + {3, "user_enable", &user_mode_unaligned_fixup_enable, + sizeof(int), 0644, NULL, &proc_dointvec}, +#endif + {0} +}; + +static ctl_table unaligned_root[] = { + {1, "unaligned_fixup", NULL, 0, 0555, unaligned_table}, + {0} +}; + +static ctl_table sh64_root[] = { + {1, "sh64", NULL, 0, 0555, unaligned_root}, + {0} +}; +static struct ctl_table_header *sysctl_header; +static int __init init_sysctl(void) +{ + sysctl_header = register_sysctl_table(sh64_root, 0); + return 0; +} + +__initcall(init_sysctl); + + +asmlinkage void do_debug_interrupt(unsigned long code, struct pt_regs *regs) +{ + u64 peek_real_address_q(u64 addr); + u64 poke_real_address_q(u64 addr, u64 val); + unsigned long long DM_EXP_CAUSE_PHY = 0x0c100010; + unsigned long long exp_cause; + /* It's not worth ioremapping the debug module registers for the amount + of access we make to them - just go direct to their physical + addresses. */ + exp_cause = peek_real_address_q(DM_EXP_CAUSE_PHY); + if (exp_cause & ~4) { + printk("DM.EXP_CAUSE had unexpected bits set (=%08lx)\n", + (unsigned long)(exp_cause & 0xffffffff)); + } + show_state(); + /* Clear all DEBUGINT causes */ + poke_real_address_q(DM_EXP_CAUSE_PHY, 0x0); +} + diff --git a/arch/sh64/kernel/unwind.c b/arch/sh64/kernel/unwind.c new file mode 100644 index 0000000..f934f97 --- /dev/null +++ b/arch/sh64/kernel/unwind.c @@ -0,0 +1,326 @@ +/* + * arch/sh64/kernel/unwind.c + * + * Copyright (C) 2004 Paul Mundt + * Copyright (C) 2004 Richard Curnow + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/kallsyms.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <asm/page.h> +#include <asm/ptrace.h> +#include <asm/processor.h> +#include <asm/io.h> + +static u8 regcache[63]; + +/* + * Finding the previous stack frame isn't horribly straightforward as it is + * on some other platforms. In the sh64 case, we don't have "linked" stack + * frames, so we need to do a bit of work to determine the previous frame, + * and in turn, the previous r14/r18 pair. + * + * There are generally a few cases which determine where we can find out + * the r14/r18 values. In the general case, this can be determined by poking + * around the prologue of the symbol PC is in (note that we absolutely must + * have frame pointer support as well as the kernel symbol table mapped, + * otherwise we can't even get this far). + * + * In other cases, such as the interrupt/exception path, we can poke around + * the sp/fp. + * + * Notably, this entire approach is somewhat error prone, and in the event + * that the previous frame cannot be determined, that's all we can do. + * Either way, this still leaves us with a more correct backtrace then what + * we would be able to come up with by walking the stack (which is garbage + * for anything beyond the first frame). + * -- PFM. + */ +static int lookup_prev_stack_frame(unsigned long fp, unsigned long pc, + unsigned long *pprev_fp, unsigned long *pprev_pc, + struct pt_regs *regs) +{ + const char *sym; + char *modname, namebuf[128]; + unsigned long offset, size; + unsigned long prologue = 0; + unsigned long fp_displacement = 0; + unsigned long fp_prev = 0; + unsigned long offset_r14 = 0, offset_r18 = 0; + int i, found_prologue_end = 0; + + sym = kallsyms_lookup(pc, &size, &offset, &modname, namebuf); + if (!sym) + return -EINVAL; + + prologue = pc - offset; + if (!prologue) + return -EINVAL; + + /* Validate fp, to avoid risk of dereferencing a bad pointer later. + Assume 128Mb since that's the amount of RAM on a Cayman. Modify + when there is an SH-5 board with more. */ + if ((fp < (unsigned long) phys_to_virt(__MEMORY_START)) || + (fp >= (unsigned long)(phys_to_virt(__MEMORY_START)) + 128*1024*1024) || + ((fp & 7) != 0)) { + return -EINVAL; + } + + /* + * Depth to walk, depth is completely arbitrary. + */ + for (i = 0; i < 100; i++, prologue += sizeof(unsigned long)) { + unsigned long op; + u8 major, minor; + u8 src, dest, disp; + + op = *(unsigned long *)prologue; + + major = (op >> 26) & 0x3f; + src = (op >> 20) & 0x3f; + minor = (op >> 16) & 0xf; + disp = (op >> 10) & 0x3f; + dest = (op >> 4) & 0x3f; + + /* + * Stack frame creation happens in a number of ways.. in the + * general case when the stack frame is less than 511 bytes, + * it's generally created by an addi or addi.l: + * + * addi/addi.l r15, -FRAME_SIZE, r15 + * + * in the event that the frame size is bigger than this, it's + * typically created using a movi/sub pair as follows: + * + * movi FRAME_SIZE, rX + * sub r15, rX, r15 + */ + + switch (major) { + case (0x00 >> 2): + switch (minor) { + case 0x8: /* add.l */ + case 0x9: /* add */ + /* Look for r15, r63, r14 */ + if (src == 15 && disp == 63 && dest == 14) + found_prologue_end = 1; + + break; + case 0xa: /* sub.l */ + case 0xb: /* sub */ + if (src != 15 || dest != 15) + continue; + + fp_displacement -= regcache[disp]; + fp_prev = fp - fp_displacement; + break; + } + break; + case (0xa8 >> 2): /* st.l */ + if (src != 15) + continue; + + switch (dest) { + case 14: + if (offset_r14 || fp_displacement == 0) + continue; + + offset_r14 = (u64)(((((s64)op >> 10) & 0x3ff) << 54) >> 54); + offset_r14 *= sizeof(unsigned long); + offset_r14 += fp_displacement; + break; + case 18: + if (offset_r18 || fp_displacement == 0) + continue; + + offset_r18 = (u64)(((((s64)op >> 10) & 0x3ff) << 54) >> 54); + offset_r18 *= sizeof(unsigned long); + offset_r18 += fp_displacement; + break; + } + + break; + case (0xcc >> 2): /* movi */ + if (dest >= 63) { + printk(KERN_NOTICE "%s: Invalid dest reg %d " + "specified in movi handler. Failed " + "opcode was 0x%lx: ", __FUNCTION__, + dest, op); + + continue; + } + + /* Sign extend */ + regcache[dest] = + ((((s64)(u64)op >> 10) & 0xffff) << 54) >> 54; + break; + case (0xd0 >> 2): /* addi */ + case (0xd4 >> 2): /* addi.l */ + /* Look for r15, -FRAME_SIZE, r15 */ + if (src != 15 || dest != 15) + continue; + + /* Sign extended frame size.. */ + fp_displacement += + (u64)(((((s64)op >> 10) & 0x3ff) << 54) >> 54); + fp_prev = fp - fp_displacement; + break; + } + + if (found_prologue_end && offset_r14 && (offset_r18 || *pprev_pc) && fp_prev) + break; + } + + if (offset_r14 == 0 || fp_prev == 0) { + if (!offset_r14) + pr_debug("Unable to find r14 offset\n"); + if (!fp_prev) + pr_debug("Unable to find previous fp\n"); + + return -EINVAL; + } + + /* For innermost leaf function, there might not be a offset_r18 */ + if (!*pprev_pc && (offset_r18 == 0)) + return -EINVAL; + + *pprev_fp = *(unsigned long *)(fp_prev + offset_r14); + + if (offset_r18) + *pprev_pc = *(unsigned long *)(fp_prev + offset_r18); + + *pprev_pc &= ~1; + + return 0; +} + +/* Don't put this on the stack since we'll want to call sh64_unwind + * when we're close to underflowing the stack anyway. */ +static struct pt_regs here_regs; + +extern const char syscall_ret; +extern const char ret_from_syscall; +extern const char ret_from_exception; +extern const char ret_from_irq; + +static void sh64_unwind_inner(struct pt_regs *regs); + +static void unwind_nested (unsigned long pc, unsigned long fp) +{ + if ((fp >= __MEMORY_START) && + ((fp & 7) == 0)) { + sh64_unwind_inner((struct pt_regs *) fp); + } +} + +static void sh64_unwind_inner(struct pt_regs *regs) +{ + unsigned long pc, fp; + int ofs = 0; + int first_pass; + + pc = regs->pc & ~1; + fp = regs->regs[14]; + + first_pass = 1; + for (;;) { + int cond; + unsigned long next_fp, next_pc; + + if (pc == ((unsigned long) &syscall_ret & ~1)) { + printk("SYSCALL\n"); + unwind_nested(pc,fp); + return; + } + + if (pc == ((unsigned long) &ret_from_syscall & ~1)) { + printk("SYSCALL (PREEMPTED)\n"); + unwind_nested(pc,fp); + return; + } + + /* In this case, the PC is discovered by lookup_prev_stack_frame but + it has 4 taken off it to look like the 'caller' */ + if (pc == ((unsigned long) &ret_from_exception & ~1)) { + printk("EXCEPTION\n"); + unwind_nested(pc,fp); + return; + } + + if (pc == ((unsigned long) &ret_from_irq & ~1)) { + printk("IRQ\n"); + unwind_nested(pc,fp); + return; + } + + cond = ((pc >= __MEMORY_START) && (fp >= __MEMORY_START) && + ((pc & 3) == 0) && ((fp & 7) == 0)); + + pc -= ofs; + + printk("[<%08lx>] ", pc); + print_symbol("%s\n", pc); + + if (first_pass) { + /* If the innermost frame is a leaf function, it's + * possible that r18 is never saved out to the stack. + */ + next_pc = regs->regs[18]; + } else { + next_pc = 0; + } + + if (lookup_prev_stack_frame(fp, pc, &next_fp, &next_pc, regs) == 0) { + ofs = sizeof(unsigned long); + pc = next_pc & ~1; + fp = next_fp; + } else { + printk("Unable to lookup previous stack frame\n"); + break; + } + first_pass = 0; + } + + printk("\n"); + +} + +void sh64_unwind(struct pt_regs *regs) +{ + if (!regs) { + /* + * Fetch current regs if we have no other saved state to back + * trace from. + */ + regs = &here_regs; + + __asm__ __volatile__ ("ori r14, 0, %0" : "=r" (regs->regs[14])); + __asm__ __volatile__ ("ori r15, 0, %0" : "=r" (regs->regs[15])); + __asm__ __volatile__ ("ori r18, 0, %0" : "=r" (regs->regs[18])); + + __asm__ __volatile__ ("gettr tr0, %0" : "=r" (regs->tregs[0])); + __asm__ __volatile__ ("gettr tr1, %0" : "=r" (regs->tregs[1])); + __asm__ __volatile__ ("gettr tr2, %0" : "=r" (regs->tregs[2])); + __asm__ __volatile__ ("gettr tr3, %0" : "=r" (regs->tregs[3])); + __asm__ __volatile__ ("gettr tr4, %0" : "=r" (regs->tregs[4])); + __asm__ __volatile__ ("gettr tr5, %0" : "=r" (regs->tregs[5])); + __asm__ __volatile__ ("gettr tr6, %0" : "=r" (regs->tregs[6])); + __asm__ __volatile__ ("gettr tr7, %0" : "=r" (regs->tregs[7])); + + __asm__ __volatile__ ( + "pta 0f, tr0\n\t" + "blink tr0, %0\n\t" + "0: nop" + : "=r" (regs->pc) + ); + } + + printk("\nCall Trace:\n"); + sh64_unwind_inner(regs); +} + diff --git a/arch/sh64/kernel/vmlinux.lds.S b/arch/sh64/kernel/vmlinux.lds.S new file mode 100644 index 0000000..7d9f7a6 --- /dev/null +++ b/arch/sh64/kernel/vmlinux.lds.S @@ -0,0 +1,181 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh5/vmlinux.lds.S + * + * ld script to make ST50 Linux kernel + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * + * benedict.gaster@superh.com: 2nd May 2002 + * Add definition of empty_zero_page to be the first page of kernel image. + * + * benedict.gaster@superh.com: 3rd May 2002 + * Added support for ramdisk, removing statically linked romfs at the same time. + * + * lethal@linux-sh.org: 9th May 2003 + * Kill off GLOBAL_NAME() usage and other CDC-isms. + * + * lethal@linux-sh.org: 19th May 2003 + * Remove support for ancient toolchains. + */ + +#include <linux/config.h> +#include <asm/page.h> +#include <asm/cache.h> +#include <asm/processor.h> +#include <asm/thread_info.h> + +#define LOAD_OFFSET CONFIG_CACHED_MEMORY_OFFSET +#include <asm-generic/vmlinux.lds.h> + +#ifdef NOTDEF +#ifdef CONFIG_LITTLE_ENDIAN +OUTPUT_FORMAT("elf32-sh64l-linux", "elf32-sh64l-linux", "elf32-sh64l-linux") +#else +OUTPUT_FORMAT("elf32-sh64", "elf32-sh64", "elf32-sh64") +#endif +#endif + +OUTPUT_ARCH(sh:sh5) + +#define C_PHYS(x) AT (ADDR(x) - LOAD_OFFSET) + +ENTRY(__start) +SECTIONS +{ + . = CONFIG_CACHED_MEMORY_OFFSET + CONFIG_MEMORY_START + PAGE_SIZE; + _text = .; /* Text and read-only data */ + text = .; /* Text and read-only data */ + + .empty_zero_page : C_PHYS(.empty_zero_page) { + *(.empty_zero_page) + } = 0 + + .text : C_PHYS(.text) { + *(.text) + *(.text64) + *(.text..SHmedia32) + SCHED_TEXT + LOCK_TEXT + *(.fixup) + *(.gnu.warning) +#ifdef CONFIG_LITTLE_ENDIAN + } = 0x6ff0fff0 +#else + } = 0xf0fff06f +#endif + + /* We likely want __ex_table to be Cache Line aligned */ + . = ALIGN(L1_CACHE_BYTES); /* Exception table */ + __start___ex_table = .; + __ex_table : C_PHYS(__ex_table) { *(__ex_table) } + __stop___ex_table = .; + + RODATA + + _etext = .; /* End of text section */ + + .data : C_PHYS(.data) { /* Data */ + *(.data) + CONSTRUCTORS + } + + . = ALIGN(PAGE_SIZE); + .data.page_aligned : C_PHYS(.data.page_aligned) { *(.data.page_aligned) } + + . = ALIGN(L1_CACHE_BYTES); + __per_cpu_start = .; + .data.percpu : C_PHYS(.data.percpu) { *(.data.percpu) } + __per_cpu_end = . ; + .data.cacheline_aligned : C_PHYS(.data.cacheline_aligned) { *(.data.cacheline_aligned) } + + _edata = .; /* End of data section */ + + . = ALIGN(THREAD_SIZE); /* init_task: structure size aligned */ + .data.init_task : C_PHYS(.data.init_task) { *(.data.init_task) } + + . = ALIGN(PAGE_SIZE); /* Init code and data */ + __init_begin = .; + _sinittext = .; + .init.text : C_PHYS(.init.text) { *(.init.text) } + _einittext = .; + .init.data : C_PHYS(.init.data) { *(.init.data) } + . = ALIGN(L1_CACHE_BYTES); /* Better if Cache Line aligned */ + __setup_start = .; + .init.setup : C_PHYS(.init.setup) { *(.init.setup) } + __setup_end = .; + __initcall_start = .; + .initcall.init : C_PHYS(.initcall.init) { + *(.initcall1.init) + *(.initcall2.init) + *(.initcall3.init) + *(.initcall4.init) + *(.initcall5.init) + *(.initcall6.init) + *(.initcall7.init) + } + __initcall_end = .; + __con_initcall_start = .; + .con_initcall.init : C_PHYS(.con_initcall.init) { *(.con_initcall.init) } + __con_initcall_end = .; + SECURITY_INIT + __initramfs_start = .; + .init.ramfs : C_PHYS(.init.ramfs) { *(.init.ramfs) } + __initramfs_end = .; + . = ALIGN(PAGE_SIZE); + __init_end = .; + + /* Align to the biggest single data representation, head and tail */ + . = ALIGN(8); + __bss_start = .; /* BSS */ + .bss : C_PHYS(.bss) { + *(.bss) + } + . = ALIGN(8); + _end = . ; + + /* Sections to be discarded */ + /DISCARD/ : { + *(.exit.text) + *(.exit.data) + *(.exitcall.exit) + } + + /* Stabs debugging sections. */ + .stab 0 : C_PHYS(.stab) { *(.stab) } + .stabstr 0 : C_PHYS(.stabstr) { *(.stabstr) } + .stab.excl 0 : C_PHYS(.stab.excl) { *(.stab.excl) } + .stab.exclstr 0 : C_PHYS(.stab.exclstr) { *(.stab.exclstr) } + .stab.index 0 : C_PHYS(.stab.index) { *(.stab.index) } + .stab.indexstr 0 : C_PHYS(.stab.indexstr) { *(.stab.indexstr) } + .comment 0 : C_PHYS(.comment) { *(.comment) } + /* DWARF debug sections. + Symbols in the DWARF debugging section are relative to the beginning + of the section so we begin .debug at 0. */ + /* DWARF 1 */ + .debug 0 : C_PHYS(.debug) { *(.debug) } + .line 0 : C_PHYS(.line) { *(.line) } + /* GNU DWARF 1 extensions */ + .debug_srcinfo 0 : C_PHYS(.debug_srcinfo) { *(.debug_srcinfo) } + .debug_sfnames 0 : C_PHYS(.debug_sfnames) { *(.debug_sfnames) } + /* DWARF 1.1 and DWARF 2 */ + .debug_aranges 0 : C_PHYS(.debug_aranges) { *(.debug_aranges) } + .debug_pubnames 0 : C_PHYS(.debug_pubnames) { *(.debug_pubnames) } + /* DWARF 2 */ + .debug_info 0 : C_PHYS(.debug_info) { *(.debug_info) } + .debug_abbrev 0 : C_PHYS(.debug_abbrev) { *(.debug_abbrev) } + .debug_line 0 : C_PHYS(.debug_line) { *(.debug_line) } + .debug_frame 0 : C_PHYS(.debug_frame) { *(.debug_frame) } + .debug_str 0 : C_PHYS(.debug_str) { *(.debug_str) } + .debug_loc 0 : C_PHYS(.debug_loc) { *(.debug_loc) } + .debug_macinfo 0 : C_PHYS(.debug_macinfo) { *(.debug_macinfo) } + /* SGI/MIPS DWARF 2 extensions */ + .debug_weaknames 0 : C_PHYS(.debug_weaknames) { *(.debug_weaknames) } + .debug_funcnames 0 : C_PHYS(.debug_funcnames) { *(.debug_funcnames) } + .debug_typenames 0 : C_PHYS(.debug_typenames) { *(.debug_typenames) } + .debug_varnames 0 : C_PHYS(.debug_varnames) { *(.debug_varnames) } + /* These must appear regardless of . */ +} diff --git a/arch/sh64/lib/Makefile b/arch/sh64/lib/Makefile new file mode 100644 index 0000000..6a4cc3f --- /dev/null +++ b/arch/sh64/lib/Makefile @@ -0,0 +1,19 @@ +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2000, 2001 Paolo Alberelli +# Coprygith (C) 2003 Paul Mundt +# +# Makefile for the SH-5 specific library files.. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +# Panic should really be compiled as PIC +lib-y := udelay.o c-checksum.o dbg.o io.o panic.o memcpy.o copy_user_memcpy.o \ + page_copy.o page_clear.o iomap.o + diff --git a/arch/sh64/lib/c-checksum.c b/arch/sh64/lib/c-checksum.c new file mode 100644 index 0000000..a82d8f1 --- /dev/null +++ b/arch/sh64/lib/c-checksum.c @@ -0,0 +1,231 @@ +/* + * arch/sh/lib/csum_parial.c + * + * This file contains network checksum routines that are better done + * in an architecture-specific manner due to speed.. + */ + +#undef DEBUG + +#include <linux/config.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <asm/byteorder.h> +#include <asm/uaccess.h> + +static inline unsigned short from64to16(unsigned long long x) +{ + /* add up 32-bit words for 33 bits */ + x = (x & 0xffffffff) + (x >> 32); + /* add up 16-bit and 17-bit words for 17+c bits */ + x = (x & 0xffff) + (x >> 16); + /* add up 16-bit and 2-bit for 16+c bit */ + x = (x & 0xffff) + (x >> 16); + /* add up carry.. */ + x = (x & 0xffff) + (x >> 16); + return x; +} + +static inline unsigned short foldto16(unsigned long x) +{ + /* add up 16-bit for 17 bits */ + x = (x & 0xffff) + (x >> 16); + /* add up carry.. */ + x = (x & 0xffff) + (x >> 16); + return x; +} + +static inline unsigned short myfoldto16(unsigned long long x) +{ + /* Fold down to 32-bits so we don't loose in the typedef-less + network stack. */ + /* 64 to 33 */ + x = (x & 0xffffffff) + (x >> 32); + /* 33 to 32 */ + x = (x & 0xffffffff) + (x >> 32); + + /* add up 16-bit for 17 bits */ + x = (x & 0xffff) + (x >> 16); + /* add up carry.. */ + x = (x & 0xffff) + (x >> 16); + return x; +} + +#define odd(x) ((x)&1) +#define U16(x) ntohs(x) + +static unsigned long do_csum(const unsigned char *buff, int len) +{ + int odd, count; + unsigned long result = 0; + + pr_debug("do_csum buff %p, len %d (0x%x)\n", buff, len, len); +#ifdef DEBUG + for (i = 0; i < len; i++) { + if ((i % 26) == 0) + printk("\n"); + printk("%02X ", buff[i]); + } +#endif + + if (len <= 0) + goto out; + + odd = 1 & (unsigned long) buff; + if (odd) { + result = *buff << 8; + len--; + buff++; + } + count = len >> 1; /* nr of 16-bit words.. */ + if (count) { + if (2 & (unsigned long) buff) { + result += *(unsigned short *) buff; + count--; + len -= 2; + buff += 2; + } + count >>= 1; /* nr of 32-bit words.. */ + if (count) { + unsigned long carry = 0; + do { + unsigned long w = *(unsigned long *) buff; + buff += 4; + count--; + result += carry; + result += w; + carry = (w > result); + } while (count); + result += carry; + result = (result & 0xffff) + (result >> 16); + } + if (len & 2) { + result += *(unsigned short *) buff; + buff += 2; + } + } + if (len & 1) + result += *buff; + result = foldto16(result); + if (odd) + result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); + + pr_debug("\nCHECKSUM is 0x%x\n", result); + + out: + return result; +} + +/* computes the checksum of a memory block at buff, length len, + and adds in "sum" (32-bit) */ +unsigned int csum_partial(const unsigned char *buff, int len, unsigned int sum) +{ + unsigned long long result = do_csum(buff, len); + + /* add in old sum, and carry.. */ + result += sum; + /* 32+c bits -> 32 bits */ + result = (result & 0xffffffff) + (result >> 32); + + pr_debug("csum_partial, buff %p len %d sum 0x%x result=0x%016Lx\n", + buff, len, sum, result); + + return result; +} + +/* Copy while checksumming, otherwise like csum_partial. */ +unsigned int +csum_partial_copy(const unsigned char *src, unsigned char *dst, int len, unsigned int sum) +{ + sum = csum_partial(src, len, sum); + memcpy(dst, src, len); + + return sum; +} + +/* Copy from userspace and compute checksum. If we catch an exception + then zero the rest of the buffer. */ +unsigned int +csum_partial_copy_from_user(const unsigned char *src, unsigned char *dst, int len, + unsigned int sum, int *err_ptr) +{ + int missing; + + pr_debug + ("csum_partial_copy_from_user src %p, dest %p, len %d, sum %08x, err_ptr %p\n", + src, dst, len, sum, err_ptr); + missing = copy_from_user(dst, src, len); + pr_debug(" access_ok %d\n", __access_ok((unsigned long) src, len)); + pr_debug(" missing %d\n", missing); + if (missing) { + memset(dst + len - missing, 0, missing); + *err_ptr = -EFAULT; + } + + return csum_partial(dst, len, sum); +} + +/* Copy to userspace and compute checksum. */ +unsigned int +csum_partial_copy_to_user(const unsigned char *src, unsigned char *dst, int len, + unsigned int sum, int *err_ptr) +{ + sum = csum_partial(src, len, sum); + + if (copy_to_user(dst, src, len)) + *err_ptr = -EFAULT; + + return sum; +} + +/* + * This is a version of ip_compute_csum() optimized for IP headers, + * which always checksum on 4 octet boundaries. + */ +unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl) +{ + pr_debug("ip_fast_csum %p,%d\n", iph, ihl); + + return ~do_csum(iph, ihl * 4); +} + +unsigned int csum_tcpudp_nofold(unsigned long saddr, + unsigned long daddr, + unsigned short len, + unsigned short proto, unsigned int sum) +{ + unsigned long long result; + + pr_debug("ntohs(0x%x)=0x%x\n", 0xdead, ntohs(0xdead)); + pr_debug("htons(0x%x)=0x%x\n", 0xdead, htons(0xdead)); + + result = ((unsigned long long) saddr + + (unsigned long long) daddr + + (unsigned long long) sum + + ((unsigned long long) ntohs(len) << 16) + + ((unsigned long long) proto << 8)); + + /* Fold down to 32-bits so we don't loose in the typedef-less + network stack. */ + /* 64 to 33 */ + result = (result & 0xffffffff) + (result >> 32); + /* 33 to 32 */ + result = (result & 0xffffffff) + (result >> 32); + + pr_debug("%s saddr %x daddr %x len %x proto %x sum %x result %08Lx\n", + __FUNCTION__, saddr, daddr, len, proto, sum, result); + + return result; +} + +// Post SIM: +unsigned int +csum_partial_copy_nocheck(const unsigned char *src, unsigned char *dst, int len, unsigned int sum) +{ + // unsigned dummy; + pr_debug("csum_partial_copy_nocheck src %p dst %p len %d\n", src, dst, + len); + + return csum_partial_copy(src, dst, len, sum); +} diff --git a/arch/sh64/lib/copy_user_memcpy.S b/arch/sh64/lib/copy_user_memcpy.S new file mode 100644 index 0000000..2a62816 --- /dev/null +++ b/arch/sh64/lib/copy_user_memcpy.S @@ -0,0 +1,217 @@ +! +! Fast SH memcpy +! +! by Toshiyasu Morita (tm@netcom.com) +! hacked by J"orn Rernnecke (joern.rennecke@superh.com) ("o for o-umlaut) +! SH5 code Copyright 2002 SuperH Ltd. +! +! Entry: ARG0: destination pointer +! ARG1: source pointer +! ARG2: byte count +! +! Exit: RESULT: destination pointer +! any other registers in the range r0-r7: trashed +! +! Notes: Usually one wants to do small reads and write a longword, but +! unfortunately it is difficult in some cases to concatanate bytes +! into a longword on the SH, so this does a longword read and small +! writes. +! +! This implementation makes two assumptions about how it is called: +! +! 1.: If the byte count is nonzero, the address of the last byte to be +! copied is unsigned greater than the address of the first byte to +! be copied. This could be easily swapped for a signed comparison, +! but the algorithm used needs some comparison. +! +! 2.: When there are two or three bytes in the last word of an 11-or-more +! bytes memory chunk to b copied, the rest of the word can be read +! without side effects. +! This could be easily changed by increasing the minumum size of +! a fast memcpy and the amount subtracted from r7 before L_2l_loop be 2, +! however, this would cost a few extra cyles on average. +! For SHmedia, the assumption is that any quadword can be read in its +! enirety if at least one byte is included in the copy. + +/* Imported into Linux kernel by Richard Curnow. This is used to implement the + __copy_user function in the general case, so it has to be a distinct + function from intra-kernel memcpy to allow for exception fix-ups in the + event that the user pointer is bad somewhere in the copy (e.g. due to + running off the end of the vma). + + Note, this algorithm will be slightly wasteful in the case where the source + and destination pointers are equally aligned, because the stlo/sthi pairs + could then be merged back into single stores. If there are a lot of cache + misses, this is probably offset by the stall lengths on the preloads. + +*/ + +/* NOTE : Prefetches removed and allocos guarded by synco to avoid TAKum03020 + * erratum. The first two prefetches are nop-ed out to avoid upsetting the + * instruction counts used in the jump address calculation. + * */ + + .section .text..SHmedia32,"ax" + .little + .balign 32 + .global copy_user_memcpy + .global copy_user_memcpy_end +copy_user_memcpy: + +#define LDUAQ(P,O,D0,D1) ldlo.q P,O,D0; ldhi.q P,O+7,D1 +#define STUAQ(P,O,D0,D1) stlo.q P,O,D0; sthi.q P,O+7,D1 +#define LDUAL(P,O,D0,D1) ldlo.l P,O,D0; ldhi.l P,O+3,D1 +#define STUAL(P,O,D0,D1) stlo.l P,O,D0; sthi.l P,O+3,D1 + + nop ! ld.b r3,0,r63 ! TAKum03020 + pta/l Large,tr0 + movi 25,r0 + bgeu/u r4,r0,tr0 + nsb r4,r0 + shlli r0,5,r0 + movi (L1-L0+63*32 + 1) & 0xffff,r1 + sub r1, r0, r0 +L0: ptrel r0,tr0 + add r2,r4,r5 + ptabs r18,tr1 + add r3,r4,r6 + blink tr0,r63 + +/* Rearranged to make cut2 safe */ + .balign 8 +L4_7: /* 4..7 byte memcpy cntd. */ + stlo.l r2, 0, r0 + or r6, r7, r6 + sthi.l r5, -1, r6 + stlo.l r5, -4, r6 + blink tr1,r63 + + .balign 8 +L1: /* 0 byte memcpy */ + nop + blink tr1,r63 + nop + nop + nop + nop + +L2_3: /* 2 or 3 byte memcpy cntd. */ + st.b r5,-1,r6 + blink tr1,r63 + + /* 1 byte memcpy */ + ld.b r3,0,r0 + st.b r2,0,r0 + blink tr1,r63 + +L8_15: /* 8..15 byte memcpy cntd. */ + stlo.q r2, 0, r0 + or r6, r7, r6 + sthi.q r5, -1, r6 + stlo.q r5, -8, r6 + blink tr1,r63 + + /* 2 or 3 byte memcpy */ + ld.b r3,0,r0 + nop ! ld.b r2,0,r63 ! TAKum03020 + ld.b r3,1,r1 + st.b r2,0,r0 + pta/l L2_3,tr0 + ld.b r6,-1,r6 + st.b r2,1,r1 + blink tr0, r63 + + /* 4 .. 7 byte memcpy */ + LDUAL (r3, 0, r0, r1) + pta L4_7, tr0 + ldlo.l r6, -4, r7 + or r0, r1, r0 + sthi.l r2, 3, r0 + ldhi.l r6, -1, r6 + blink tr0, r63 + + /* 8 .. 15 byte memcpy */ + LDUAQ (r3, 0, r0, r1) + pta L8_15, tr0 + ldlo.q r6, -8, r7 + or r0, r1, r0 + sthi.q r2, 7, r0 + ldhi.q r6, -1, r6 + blink tr0, r63 + + /* 16 .. 24 byte memcpy */ + LDUAQ (r3, 0, r0, r1) + LDUAQ (r3, 8, r8, r9) + or r0, r1, r0 + sthi.q r2, 7, r0 + or r8, r9, r8 + sthi.q r2, 15, r8 + ldlo.q r6, -8, r7 + ldhi.q r6, -1, r6 + stlo.q r2, 8, r8 + stlo.q r2, 0, r0 + or r6, r7, r6 + sthi.q r5, -1, r6 + stlo.q r5, -8, r6 + blink tr1,r63 + +Large: + ! ld.b r2, 0, r63 ! TAKum03020 + pta/l Loop_ua, tr1 + ori r3, -8, r7 + sub r2, r7, r22 + sub r3, r2, r6 + add r2, r4, r5 + ldlo.q r3, 0, r0 + addi r5, -16, r5 + movi 64+8, r27 ! could subtract r7 from that. + stlo.q r2, 0, r0 + sthi.q r2, 7, r0 + ldx.q r22, r6, r0 + bgtu/l r27, r4, tr1 + + addi r5, -48, r27 + pta/l Loop_line, tr0 + addi r6, 64, r36 + addi r6, -24, r19 + addi r6, -16, r20 + addi r6, -8, r21 + +Loop_line: + ! ldx.q r22, r36, r63 ! TAKum03020 + alloco r22, 32 + synco + addi r22, 32, r22 + ldx.q r22, r19, r23 + sthi.q r22, -25, r0 + ldx.q r22, r20, r24 + ldx.q r22, r21, r25 + stlo.q r22, -32, r0 + ldx.q r22, r6, r0 + sthi.q r22, -17, r23 + sthi.q r22, -9, r24 + sthi.q r22, -1, r25 + stlo.q r22, -24, r23 + stlo.q r22, -16, r24 + stlo.q r22, -8, r25 + bgeu r27, r22, tr0 + +Loop_ua: + addi r22, 8, r22 + sthi.q r22, -1, r0 + stlo.q r22, -8, r0 + ldx.q r22, r6, r0 + bgtu/l r5, r22, tr1 + + add r3, r4, r7 + ldlo.q r7, -8, r1 + sthi.q r22, 7, r0 + ldhi.q r7, -1, r7 + ptabs r18,tr1 + stlo.q r22, 0, r0 + or r1, r7, r1 + sthi.q r5, 15, r1 + stlo.q r5, 8, r1 + blink tr1, r63 +copy_user_memcpy_end: + nop diff --git a/arch/sh64/lib/dbg.c b/arch/sh64/lib/dbg.c new file mode 100644 index 0000000..526feda --- /dev/null +++ b/arch/sh64/lib/dbg.c @@ -0,0 +1,430 @@ +/*-------------------------------------------------------------------------- +-- +-- Identity : Linux50 Debug Funcions +-- +-- File : arch/sh64/lib/dbg.C +-- +-- Copyright 2000, 2001 STMicroelectronics Limited. +-- Copyright 2004 Richard Curnow (evt_debug etc) +-- +--------------------------------------------------------------------------*/ +#include <linux/config.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <asm/mmu_context.h> + +typedef u64 regType_t; + +static regType_t getConfigReg(u64 id) +{ + register u64 reg __asm__("r2"); + asm volatile ("getcfg %1, 0, %0":"=r" (reg):"r"(id)); + return (reg); +} + +/* ======================================================================= */ + +static char *szTab[] = { "4k", "64k", "1M", "512M" }; +static char *protTab[] = { "----", + "---R", + "--X-", + "--XR", + "-W--", + "-W-R", + "-WX-", + "-WXR", + "U---", + "U--R", + "U-X-", + "U-XR", + "UW--", + "UW-R", + "UWX-", + "UWXR" +}; +#define ITLB_BASE 0x00000000 +#define DTLB_BASE 0x00800000 +#define MAX_TLBs 64 +/* PTE High */ +#define GET_VALID(pte) ((pte) & 0x1) +#define GET_SHARED(pte) ((pte) & 0x2) +#define GET_ASID(pte) ((pte >> 2) & 0x0ff) +#define GET_EPN(pte) ((pte) & 0xfffff000) + +/* PTE Low */ +#define GET_CBEHAVIOR(pte) ((pte) & 0x3) +#define GET_PAGE_SIZE(pte) szTab[((pte >> 3) & 0x3)] +#define GET_PROTECTION(pte) protTab[((pte >> 6) & 0xf)] +#define GET_PPN(pte) ((pte) & 0xfffff000) + +#define PAGE_1K_MASK 0x00000000 +#define PAGE_4K_MASK 0x00000010 +#define PAGE_64K_MASK 0x00000080 +#define MMU_PAGESIZE_MASK (PAGE_64K_MASK | PAGE_4K_MASK) +#define PAGE_1MB_MASK MMU_PAGESIZE_MASK +#define PAGE_1K (1024) +#define PAGE_4K (1024 * 4) +#define PAGE_64K (1024 * 64) +#define PAGE_1MB (1024 * 1024) + +#define HOW_TO_READ_TLB_CONTENT \ + "[ ID] PPN EPN ASID Share CB P.Size PROT.\n" + +void print_single_tlb(unsigned long tlb, int single_print) +{ + regType_t pteH; + regType_t pteL; + unsigned int valid, shared, asid, epn, cb, ppn; + char *pSize; + char *pProt; + + /* + ** in case of single print <single_print> is true, this implies: + ** 1) print the TLB in any case also if NOT VALID + ** 2) print out the header + */ + + pteH = getConfigReg(tlb); + valid = GET_VALID(pteH); + if (single_print) + printk(HOW_TO_READ_TLB_CONTENT); + else if (!valid) + return; + + pteL = getConfigReg(tlb + 1); + + shared = GET_SHARED(pteH); + asid = GET_ASID(pteH); + epn = GET_EPN(pteH); + cb = GET_CBEHAVIOR(pteL); + pSize = GET_PAGE_SIZE(pteL); + pProt = GET_PROTECTION(pteL); + ppn = GET_PPN(pteL); + printk("[%c%2ld] 0x%08x 0x%08x %03d %02x %02x %4s %s\n", + ((valid) ? ' ' : 'u'), ((tlb & 0x0ffff) / TLB_STEP), + ppn, epn, asid, shared, cb, pSize, pProt); +} + +void print_dtlb(void) +{ + int count; + unsigned long tlb; + + printk(" ================= SH-5 D-TLBs Status ===================\n"); + printk(HOW_TO_READ_TLB_CONTENT); + tlb = DTLB_BASE; + for (count = 0; count < MAX_TLBs; count++, tlb += TLB_STEP) + print_single_tlb(tlb, 0); + printk + (" =============================================================\n"); +} + +void print_itlb(void) +{ + int count; + unsigned long tlb; + + printk(" ================= SH-5 I-TLBs Status ===================\n"); + printk(HOW_TO_READ_TLB_CONTENT); + tlb = ITLB_BASE; + for (count = 0; count < MAX_TLBs; count++, tlb += TLB_STEP) + print_single_tlb(tlb, 0); + printk + (" =============================================================\n"); +} + +/* ======================================================================= */ + +#ifdef CONFIG_POOR_MANS_STRACE + +#include "syscalltab.h" + +struct ring_node { + int evt; + int ret_addr; + int event; + int tra; + int pid; + unsigned long sp; + unsigned long pc; +}; + +static struct ring_node event_ring[16]; +static int event_ptr = 0; + +struct stored_syscall_data { + int pid; + int syscall_number; +}; + +#define N_STORED_SYSCALLS 16 + +static struct stored_syscall_data stored_syscalls[N_STORED_SYSCALLS]; +static int syscall_next=0; +static int syscall_next_print=0; + +void evt_debug(int evt, int ret_addr, int event, int tra, struct pt_regs *regs) +{ + int syscallno = tra & 0xff; + unsigned long sp; + unsigned long stack_bottom; + int pid; + struct ring_node *rr; + + pid = current->pid; + stack_bottom = (unsigned long) current->thread_info; + asm volatile("ori r15, 0, %0" : "=r" (sp)); + rr = event_ring + event_ptr; + rr->evt = evt; + rr->ret_addr = ret_addr; + rr->event = event; + rr->tra = tra; + rr->pid = pid; + rr->sp = sp; + rr->pc = regs->pc; + + if (sp < stack_bottom + 3092) { + printk("evt_debug : stack underflow report\n"); + int i, j; + for (j=0, i = event_ptr; j<16; j++) { + rr = event_ring + i; + printk("evt=%08x event=%08x tra=%08x pid=%5d sp=%08lx pc=%08lx\n", + rr->evt, rr->event, rr->tra, rr->pid, rr->sp, rr->pc); + i--; + i &= 15; + } + panic("STACK UNDERFLOW\n"); + } + + event_ptr = (event_ptr + 1) & 15; + + if ((event == 2) && (evt == 0x160)) { + if (syscallno < NUM_SYSCALL_INFO_ENTRIES) { + /* Store the syscall information to print later. We + * can't print this now - currently we're running with + * SR.BL=1, so we can't take a tlbmiss (which could occur + * in the console drivers under printk). + * + * Just overwrite old entries on ring overflow - this + * is only for last-hope debugging. */ + stored_syscalls[syscall_next].pid = current->pid; + stored_syscalls[syscall_next].syscall_number = syscallno; + syscall_next++; + syscall_next &= (N_STORED_SYSCALLS - 1); + } + } +} + +static void drain_syscalls(void) { + while (syscall_next_print != syscall_next) { + printk("Task %d: %s()\n", + stored_syscalls[syscall_next_print].pid, + syscall_info_table[stored_syscalls[syscall_next_print].syscall_number].name); + syscall_next_print++; + syscall_next_print &= (N_STORED_SYSCALLS - 1); + } +} + +void evt_debug2(unsigned int ret) +{ + drain_syscalls(); + printk("Task %d: syscall returns %08x\n", current->pid, ret); +} + +void evt_debug_ret_from_irq(struct pt_regs *regs) +{ + int pid; + struct ring_node *rr; + + pid = current->pid; + rr = event_ring + event_ptr; + rr->evt = 0xffff; + rr->ret_addr = 0; + rr->event = 0; + rr->tra = 0; + rr->pid = pid; + rr->pc = regs->pc; + event_ptr = (event_ptr + 1) & 15; +} + +void evt_debug_ret_from_exc(struct pt_regs *regs) +{ + int pid; + struct ring_node *rr; + + pid = current->pid; + rr = event_ring + event_ptr; + rr->evt = 0xfffe; + rr->ret_addr = 0; + rr->event = 0; + rr->tra = 0; + rr->pid = pid; + rr->pc = regs->pc; + event_ptr = (event_ptr + 1) & 15; +} + +#endif /* CONFIG_POOR_MANS_STRACE */ + +/* ======================================================================= */ + +void show_excp_regs(char *from, int trapnr, int signr, struct pt_regs *regs) +{ + + unsigned long long ah, al, bh, bl, ch, cl; + + printk("\n"); + printk("EXCEPTION - %s: task %d; Linux trap # %d; signal = %d\n", + ((from) ? from : "???"), current->pid, trapnr, signr); + + asm volatile ("getcon " __EXPEVT ", %0":"=r"(ah)); + asm volatile ("getcon " __EXPEVT ", %0":"=r"(al)); + ah = (ah) >> 32; + al = (al) & 0xffffffff; + asm volatile ("getcon " __KCR1 ", %0":"=r"(bh)); + asm volatile ("getcon " __KCR1 ", %0":"=r"(bl)); + bh = (bh) >> 32; + bl = (bl) & 0xffffffff; + asm volatile ("getcon " __INTEVT ", %0":"=r"(ch)); + asm volatile ("getcon " __INTEVT ", %0":"=r"(cl)); + ch = (ch) >> 32; + cl = (cl) & 0xffffffff; + printk("EXPE: %08Lx%08Lx KCR1: %08Lx%08Lx INTE: %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + asm volatile ("getcon " __PEXPEVT ", %0":"=r"(ah)); + asm volatile ("getcon " __PEXPEVT ", %0":"=r"(al)); + ah = (ah) >> 32; + al = (al) & 0xffffffff; + asm volatile ("getcon " __PSPC ", %0":"=r"(bh)); + asm volatile ("getcon " __PSPC ", %0":"=r"(bl)); + bh = (bh) >> 32; + bl = (bl) & 0xffffffff; + asm volatile ("getcon " __PSSR ", %0":"=r"(ch)); + asm volatile ("getcon " __PSSR ", %0":"=r"(cl)); + ch = (ch) >> 32; + cl = (cl) & 0xffffffff; + printk("PEXP: %08Lx%08Lx PSPC: %08Lx%08Lx PSSR: %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->pc) >> 32; + al = (regs->pc) & 0xffffffff; + bh = (regs->regs[18]) >> 32; + bl = (regs->regs[18]) & 0xffffffff; + ch = (regs->regs[15]) >> 32; + cl = (regs->regs[15]) & 0xffffffff; + printk("PC : %08Lx%08Lx LINK: %08Lx%08Lx SP : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->sr) >> 32; + al = (regs->sr) & 0xffffffff; + asm volatile ("getcon " __TEA ", %0":"=r"(bh)); + asm volatile ("getcon " __TEA ", %0":"=r"(bl)); + bh = (bh) >> 32; + bl = (bl) & 0xffffffff; + asm volatile ("getcon " __KCR0 ", %0":"=r"(ch)); + asm volatile ("getcon " __KCR0 ", %0":"=r"(cl)); + ch = (ch) >> 32; + cl = (cl) & 0xffffffff; + printk("SR : %08Lx%08Lx TEA : %08Lx%08Lx KCR0: %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[0]) >> 32; + al = (regs->regs[0]) & 0xffffffff; + bh = (regs->regs[1]) >> 32; + bl = (regs->regs[1]) & 0xffffffff; + ch = (regs->regs[2]) >> 32; + cl = (regs->regs[2]) & 0xffffffff; + printk("R0 : %08Lx%08Lx R1 : %08Lx%08Lx R2 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[3]) >> 32; + al = (regs->regs[3]) & 0xffffffff; + bh = (regs->regs[4]) >> 32; + bl = (regs->regs[4]) & 0xffffffff; + ch = (regs->regs[5]) >> 32; + cl = (regs->regs[5]) & 0xffffffff; + printk("R3 : %08Lx%08Lx R4 : %08Lx%08Lx R5 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[6]) >> 32; + al = (regs->regs[6]) & 0xffffffff; + bh = (regs->regs[7]) >> 32; + bl = (regs->regs[7]) & 0xffffffff; + ch = (regs->regs[8]) >> 32; + cl = (regs->regs[8]) & 0xffffffff; + printk("R6 : %08Lx%08Lx R7 : %08Lx%08Lx R8 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + + ah = (regs->regs[9]) >> 32; + al = (regs->regs[9]) & 0xffffffff; + bh = (regs->regs[10]) >> 32; + bl = (regs->regs[10]) & 0xffffffff; + ch = (regs->regs[11]) >> 32; + cl = (regs->regs[11]) & 0xffffffff; + printk("R9 : %08Lx%08Lx R10 : %08Lx%08Lx R11 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + printk("....\n"); + + ah = (regs->tregs[0]) >> 32; + al = (regs->tregs[0]) & 0xffffffff; + bh = (regs->tregs[1]) >> 32; + bl = (regs->tregs[1]) & 0xffffffff; + ch = (regs->tregs[2]) >> 32; + cl = (regs->tregs[2]) & 0xffffffff; + printk("T0 : %08Lx%08Lx T1 : %08Lx%08Lx T2 : %08Lx%08Lx\n", + ah, al, bh, bl, ch, cl); + printk("....\n"); + + print_dtlb(); + print_itlb(); +} + +/* ======================================================================= */ + +/* +** Depending on <base> scan the MMU, Data or Instrction side +** looking for a valid mapping matching Eaddr & asid. +** Return -1 if not found or the TLB id entry otherwise. +** Note: it works only for 4k pages! +*/ +static unsigned long +lookup_mmu_side(unsigned long base, unsigned long Eaddr, unsigned long asid) +{ + regType_t pteH; + unsigned long epn; + int count; + + epn = Eaddr & 0xfffff000; + + for (count = 0; count < MAX_TLBs; count++, base += TLB_STEP) { + pteH = getConfigReg(base); + if (GET_VALID(pteH)) + if ((unsigned long) GET_EPN(pteH) == epn) + if ((unsigned long) GET_ASID(pteH) == asid) + break; + } + return ((unsigned long) ((count < MAX_TLBs) ? base : -1)); +} + +unsigned long lookup_dtlb(unsigned long Eaddr) +{ + unsigned long asid = get_asid(); + return (lookup_mmu_side((u64) DTLB_BASE, Eaddr, asid)); +} + +unsigned long lookup_itlb(unsigned long Eaddr) +{ + unsigned long asid = get_asid(); + return (lookup_mmu_side((u64) ITLB_BASE, Eaddr, asid)); +} + +void print_page(struct page *page) +{ + printk(" page[%p] -> index 0x%lx, count 0x%x, flags 0x%lx\n", + page, page->index, page_count(page), page->flags); + printk(" address_space = %p, pages =%ld\n", page->mapping, + page->mapping->nrpages); + +} diff --git a/arch/sh64/lib/io.c b/arch/sh64/lib/io.c new file mode 100644 index 0000000..277e11b --- /dev/null +++ b/arch/sh64/lib/io.c @@ -0,0 +1,140 @@ +/* + * Copyright (C) 2000 David J. Mckay (david.mckay@st.com) + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * This file contains the I/O routines for use on the overdrive board + * + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/delay.h> +#include <asm/system.h> +#include <asm/processor.h> +#include <asm/io.h> + +/* + * readX/writeX() are used to access memory mapped devices. On some + * architectures the memory mapped IO stuff needs to be accessed + * differently. On the SuperH architecture, we just read/write the + * memory location directly. + */ + +/* This is horrible at the moment - needs more work to do something sensible */ +#define IO_DELAY() + +#define OUT_DELAY(x,type) \ +void out##x##_p(unsigned type value,unsigned long port){out##x(value,port);IO_DELAY();} + +#define IN_DELAY(x,type) \ +unsigned type in##x##_p(unsigned long port) {unsigned type tmp=in##x(port);IO_DELAY();return tmp;} + +#if 1 +OUT_DELAY(b, long) OUT_DELAY(w, long) OUT_DELAY(l, long) + IN_DELAY(b, long) IN_DELAY(w, long) IN_DELAY(l, long) +#endif +/* Now for the string version of these functions */ +void outsb(unsigned long port, const void *addr, unsigned long count) +{ + int i; + unsigned char *p = (unsigned char *) addr; + + for (i = 0; i < count; i++, p++) { + outb(*p, port); + } +} + +void insb(unsigned long port, void *addr, unsigned long count) +{ + int i; + unsigned char *p = (unsigned char *) addr; + + for (i = 0; i < count; i++, p++) { + *p = inb(port); + } +} + +/* For the 16 and 32 bit string functions, we have to worry about alignment. + * The SH does not do unaligned accesses, so we have to read as bytes and + * then write as a word or dword. + * This can be optimised a lot more, especially in the case where the data + * is aligned + */ + +void outsw(unsigned long port, const void *addr, unsigned long count) +{ + int i; + unsigned short tmp; + unsigned char *p = (unsigned char *) addr; + + for (i = 0; i < count; i++, p += 2) { + tmp = (*p) | ((*(p + 1)) << 8); + outw(tmp, port); + } +} + +void insw(unsigned long port, void *addr, unsigned long count) +{ + int i; + unsigned short tmp; + unsigned char *p = (unsigned char *) addr; + + for (i = 0; i < count; i++, p += 2) { + tmp = inw(port); + p[0] = tmp & 0xff; + p[1] = (tmp >> 8) & 0xff; + } +} + +void outsl(unsigned long port, const void *addr, unsigned long count) +{ + int i; + unsigned tmp; + unsigned char *p = (unsigned char *) addr; + + for (i = 0; i < count; i++, p += 4) { + tmp = (*p) | ((*(p + 1)) << 8) | ((*(p + 2)) << 16) | + ((*(p + 3)) << 24); + outl(tmp, port); + } +} + +void insl(unsigned long port, void *addr, unsigned long count) +{ + int i; + unsigned tmp; + unsigned char *p = (unsigned char *) addr; + + for (i = 0; i < count; i++, p += 4) { + tmp = inl(port); + p[0] = tmp & 0xff; + p[1] = (tmp >> 8) & 0xff; + p[2] = (tmp >> 16) & 0xff; + p[3] = (tmp >> 24) & 0xff; + + } +} + +void memcpy_toio(void __iomem *to, const void *from, long count) +{ + unsigned char *p = (unsigned char *) from; + + while (count) { + count--; + writeb(*p++, to++); + } +} + +void memcpy_fromio(void *to, void __iomem *from, long count) +{ + int i; + unsigned char *p = (unsigned char *) to; + + for (i = 0; i < count; i++) { + p[i] = readb(from); + from++; + } +} diff --git a/arch/sh64/lib/iomap.c b/arch/sh64/lib/iomap.c new file mode 100644 index 0000000..83c5f0c --- /dev/null +++ b/arch/sh64/lib/iomap.c @@ -0,0 +1,55 @@ +/* + * arch/sh64/lib/iomap.c + * + * Generic sh64 iomap interface + * + * Copyright (C) 2004 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/config.h> +#include <linux/pci.h> +#include <asm/io.h> + +void __iomem *__attribute__ ((weak)) +ioport_map(unsigned long port, unsigned int len) +{ + return (void __iomem *)port; +} + +void ioport_unmap(void __iomem *addr) +{ + /* Nothing .. */ +} + +void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max) +{ + unsigned long start = pci_resource_start(dev, bar); + unsigned long len = pci_resource_len(dev, bar); + unsigned long flags = pci_resource_flags(dev, bar); + + if (!len) + return NULL; + if (max && len > max) + len = max; + if (flags & IORESOURCE_IO) + return ioport_map(start + pciio_virt, len); + if (flags & IORESOURCE_MEM) + return (void __iomem *)start; + + /* What? */ + return NULL; +} + +void pci_iounmap(struct pci_dev *dev, void __iomem *addr) +{ + /* Nothing .. */ +} + +EXPORT_SYMBOL(ioport_map); +EXPORT_SYMBOL(ioport_unmap); +EXPORT_SYMBOL(pci_iomap); +EXPORT_SYMBOL(pci_iounmap); + diff --git a/arch/sh64/lib/memcpy.c b/arch/sh64/lib/memcpy.c new file mode 100644 index 0000000..c785d0a --- /dev/null +++ b/arch/sh64/lib/memcpy.c @@ -0,0 +1,82 @@ +/* + * Copyright (C) 2002 Mark Debbage (Mark.Debbage@superh.com) + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <asm/string.h> + +// This is a simplistic optimization of memcpy to increase the +// granularity of access beyond one byte using aligned +// loads and stores. This is not an optimal implementation +// for SH-5 (especially with regard to prefetching and the cache), +// and a better version should be provided later ... + +void *memcpy(void *dest, const void *src, size_t count) +{ + char *d = (char *) dest, *s = (char *) src; + + if (count >= 32) { + int i = 8 - (((unsigned long) d) & 0x7); + + if (i != 8) + while (i-- && count--) { + *d++ = *s++; + } + + if (((((unsigned long) d) & 0x7) == 0) && + ((((unsigned long) s) & 0x7) == 0)) { + while (count >= 32) { + unsigned long long t1, t2, t3, t4; + t1 = *(unsigned long long *) (s); + t2 = *(unsigned long long *) (s + 8); + t3 = *(unsigned long long *) (s + 16); + t4 = *(unsigned long long *) (s + 24); + *(unsigned long long *) (d) = t1; + *(unsigned long long *) (d + 8) = t2; + *(unsigned long long *) (d + 16) = t3; + *(unsigned long long *) (d + 24) = t4; + d += 32; + s += 32; + count -= 32; + } + while (count >= 8) { + *(unsigned long long *) d = + *(unsigned long long *) s; + d += 8; + s += 8; + count -= 8; + } + } + + if (((((unsigned long) d) & 0x3) == 0) && + ((((unsigned long) s) & 0x3) == 0)) { + while (count >= 4) { + *(unsigned long *) d = *(unsigned long *) s; + d += 4; + s += 4; + count -= 4; + } + } + + if (((((unsigned long) d) & 0x1) == 0) && + ((((unsigned long) s) & 0x1) == 0)) { + while (count >= 2) { + *(unsigned short *) d = *(unsigned short *) s; + d += 2; + s += 2; + count -= 2; + } + } + } + + while (count--) { + *d++ = *s++; + } + + return d; +} diff --git a/arch/sh64/lib/page_clear.S b/arch/sh64/lib/page_clear.S new file mode 100644 index 0000000..ac0111d --- /dev/null +++ b/arch/sh64/lib/page_clear.S @@ -0,0 +1,54 @@ +/* + Copyright 2003 Richard Curnow, SuperH (UK) Ltd. + + This file is subject to the terms and conditions of the GNU General Public + License. See the file "COPYING" in the main directory of this archive + for more details. + + Tight version of memset for the case of just clearing a page. It turns out + that having the alloco's spaced out slightly due to the increment/branch + pair causes them to contend less for access to the cache. Similarly, + keeping the stores apart from the allocos causes less contention. => Do two + separate loops. Do multiple stores per loop to amortise the + increment/branch cost a little. + + Parameters: + r2 : source effective address (start of page) + + Always clears 4096 bytes. + + Note : alloco guarded by synco to avoid TAKum03020 erratum + +*/ + + .section .text..SHmedia32,"ax" + .little + + .balign 8 + .global sh64_page_clear +sh64_page_clear: + pta/l 1f, tr1 + pta/l 2f, tr2 + ptabs/l r18, tr0 + + movi 4096, r7 + add r2, r7, r7 + add r2, r63, r6 +1: + alloco r6, 0 + synco ! TAKum03020 + addi r6, 32, r6 + bgt/l r7, r6, tr1 + + add r2, r63, r6 +2: + st.q r6, 0, r63 + st.q r6, 8, r63 + st.q r6, 16, r63 + st.q r6, 24, r63 + addi r6, 32, r6 + bgt/l r7, r6, tr2 + + blink tr0, r63 + + diff --git a/arch/sh64/lib/page_copy.S b/arch/sh64/lib/page_copy.S new file mode 100644 index 0000000..e159c3c --- /dev/null +++ b/arch/sh64/lib/page_copy.S @@ -0,0 +1,91 @@ +/* + Copyright 2003 Richard Curnow, SuperH (UK) Ltd. + + This file is subject to the terms and conditions of the GNU General Public + License. See the file "COPYING" in the main directory of this archive + for more details. + + Tight version of mempy for the case of just copying a page. + Prefetch strategy empirically optimised against RTL simulations + of SH5-101 cut2 eval chip with Cayman board DDR memory. + + Parameters: + r2 : source effective address (start of page) + r3 : destination effective address (start of page) + + Always copies 4096 bytes. + + Points to review. + * Currently the prefetch is 4 lines ahead and the alloco is 2 lines ahead. + It seems like the prefetch needs to be at at least 4 lines ahead to get + the data into the cache in time, and the allocos contend with outstanding + prefetches for the same cache set, so it's better to have the numbers + different. + */ + + .section .text..SHmedia32,"ax" + .little + + .balign 8 + .global sh64_page_copy +sh64_page_copy: + + /* Copy 4096 bytes worth of data from r2 to r3. + Do prefetches 4 lines ahead. + Do alloco 2 lines ahead */ + + pta 1f, tr1 + pta 2f, tr2 + pta 3f, tr3 + ptabs r18, tr0 + +#if 0 + /* TAKum03020 */ + ld.q r2, 0x00, r63 + ld.q r2, 0x20, r63 + ld.q r2, 0x40, r63 + ld.q r2, 0x60, r63 +#endif + alloco r3, 0x00 + synco ! TAKum03020 + alloco r3, 0x20 + synco ! TAKum03020 + + movi 3968, r6 + add r3, r6, r6 + addi r6, 64, r7 + addi r7, 64, r8 + sub r2, r3, r60 + addi r60, 8, r61 + addi r61, 8, r62 + addi r62, 8, r23 + addi r60, 0x80, r22 + +/* Minimal code size. The extra branches inside the loop don't cost much + because they overlap with the time spent waiting for prefetches to + complete. */ +1: +#if 0 + /* TAKum03020 */ + bge/u r3, r6, tr2 ! skip prefetch for last 4 lines + ldx.q r3, r22, r63 ! prefetch 4 lines hence +#endif +2: + bge/u r3, r7, tr3 ! skip alloco for last 2 lines + alloco r3, 0x40 ! alloc destination line 2 lines ahead + synco ! TAKum03020 +3: + ldx.q r3, r60, r36 + ldx.q r3, r61, r37 + ldx.q r3, r62, r38 + ldx.q r3, r23, r39 + st.q r3, 0, r36 + st.q r3, 8, r37 + st.q r3, 16, r38 + st.q r3, 24, r39 + addi r3, 32, r3 + bgt/l r8, r3, tr1 + + blink tr0, r63 ! return + + diff --git a/arch/sh64/lib/panic.c b/arch/sh64/lib/panic.c new file mode 100644 index 0000000..c9eb1cb --- /dev/null +++ b/arch/sh64/lib/panic.c @@ -0,0 +1,58 @@ +/* + * Copyright (C) 2003 Richard Curnow, SuperH UK Limited + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <linux/kernel.h> +#include <asm/io.h> +#include <asm/registers.h> + +/* THIS IS A PHYSICAL ADDRESS */ +#define HDSP2534_ADDR (0x04002100) + +#ifdef CONFIG_SH_CAYMAN + +static void poor_mans_delay(void) +{ + int i; + for (i = 0; i < 2500000; i++) { + } /* poor man's delay */ +} + +static void show_value(unsigned long x) +{ + int i; + unsigned nibble; + for (i = 0; i < 8; i++) { + nibble = ((x >> (i * 4)) & 0xf); + + ctrl_outb(nibble + ((nibble > 9) ? 55 : 48), + HDSP2534_ADDR + 0xe0 + ((7 - i) << 2)); + } +} + +#endif + +void +panic_handler(unsigned long panicPC, unsigned long panicSSR, + unsigned long panicEXPEVT) +{ +#ifdef CONFIG_SH_CAYMAN + while (1) { + /* This piece of code displays the PC on the LED display */ + show_value(panicPC); + poor_mans_delay(); + show_value(panicSSR); + poor_mans_delay(); + show_value(panicEXPEVT); + poor_mans_delay(); + } +#endif + + /* Never return from the panic handler */ + for (;;) ; + +} diff --git a/arch/sh64/lib/udelay.c b/arch/sh64/lib/udelay.c new file mode 100644 index 0000000..dad2f25 --- /dev/null +++ b/arch/sh64/lib/udelay.c @@ -0,0 +1,60 @@ +/* + * arch/sh64/lib/udelay.c + * + * Delay routines, using a pre-computed "loops_per_jiffy" value. + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003, 2004 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/config.h> +#include <linux/sched.h> +#include <asm/param.h> + +extern unsigned long loops_per_jiffy; + +/* + * Use only for very small delays (< 1 msec). + * + * The active part of our cycle counter is only 32-bits wide, and + * we're treating the difference between two marks as signed. On + * a 1GHz box, that's about 2 seconds. + */ + +void __delay(int loops) +{ + long long dummy; + __asm__ __volatile__("gettr tr0, %1\n\t" + "pta $+4, tr0\n\t" + "addi %0, -1, %0\n\t" + "bne %0, r63, tr0\n\t" + "ptabs %1, tr0\n\t":"=r"(loops), + "=r"(dummy) + :"0"(loops)); +} + +void __udelay(unsigned long long usecs, unsigned long lpj) +{ + usecs *= (((unsigned long long) HZ << 32) / 1000000) * lpj; + __delay((long long) usecs >> 32); +} + +void __ndelay(unsigned long long nsecs, unsigned long lpj) +{ + nsecs *= (((unsigned long long) HZ << 32) / 1000000000) * lpj; + __delay((long long) nsecs >> 32); +} + +void udelay(unsigned long usecs) +{ + __udelay(usecs, loops_per_jiffy); +} + +void ndelay(unsigned long nsecs) +{ + __ndelay(nsecs, loops_per_jiffy); +} + diff --git a/arch/sh64/mach-cayman/Makefile b/arch/sh64/mach-cayman/Makefile new file mode 100644 index 0000000..67a2258 --- /dev/null +++ b/arch/sh64/mach-cayman/Makefile @@ -0,0 +1,11 @@ +# +# Makefile for the Hitachi Cayman specific parts of the kernel +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +obj-y := setup.o irq.o iomap.o +obj-$(CONFIG_HEARTBEAT) += led.o + diff --git a/arch/sh64/mach-cayman/iomap.c b/arch/sh64/mach-cayman/iomap.c new file mode 100644 index 0000000..d6a538c --- /dev/null +++ b/arch/sh64/mach-cayman/iomap.c @@ -0,0 +1,24 @@ +/* + * arch/sh64/mach-cayman/iomap.c + * + * Cayman iomap interface + * + * Copyright (C) 2004 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/config.h> +#include <linux/pci.h> +#include <asm/io.h> +#include <asm/cayman.h> + +void __iomem *ioport_map(unsigned long port, unsigned int len) +{ + if (port < 0x400) + return (void __iomem *)((port << 2) | smsc_superio_virt); + + return (void __iomem *)port; +} + diff --git a/arch/sh64/mach-cayman/irq.c b/arch/sh64/mach-cayman/irq.c new file mode 100644 index 0000000..f797c84 --- /dev/null +++ b/arch/sh64/mach-cayman/irq.c @@ -0,0 +1,196 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/kernel/irq_cayman.c + * + * SH-5 Cayman Interrupt Support + * + * This file handles the board specific parts of the Cayman interrupt system + * + * Copyright (C) 2002 Stuart Menefy + */ + +#include <linux/config.h> +#include <asm/irq.h> +#include <asm/page.h> +#include <asm/io.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/signal.h> +#include <asm/cayman.h> + +unsigned long epld_virt; + +#define EPLD_BASE 0x04002000 +#define EPLD_STATUS_BASE (epld_virt + 0x10) +#define EPLD_MASK_BASE (epld_virt + 0x20) + +/* Note the SMSC SuperIO chip and SMSC LAN chip interrupts are all muxed onto + the same SH-5 interrupt */ + +static irqreturn_t cayman_interrupt_smsc(int irq, void *dev_id, struct pt_regs *regs) +{ + printk(KERN_INFO "CAYMAN: spurious SMSC interrupt\n"); + return IRQ_NONE; +} + +static irqreturn_t cayman_interrupt_pci2(int irq, void *dev_id, struct pt_regs *regs) +{ + printk(KERN_INFO "CAYMAN: spurious PCI interrupt, IRQ %d\n", irq); + return IRQ_NONE; +} + +static struct irqaction cayman_action_smsc = { + .name = "Cayman SMSC Mux", + .handler = cayman_interrupt_smsc, + .flags = SA_INTERRUPT, +}; + +static struct irqaction cayman_action_pci2 = { + .name = "Cayman PCI2 Mux", + .handler = cayman_interrupt_pci2, + .flags = SA_INTERRUPT, +}; + +static void enable_cayman_irq(unsigned int irq) +{ + unsigned long flags; + unsigned long mask; + unsigned int reg; + unsigned char bit; + + irq -= START_EXT_IRQS; + reg = EPLD_MASK_BASE + ((irq / 8) << 2); + bit = 1<<(irq % 8); + local_irq_save(flags); + mask = ctrl_inl(reg); + mask |= bit; + ctrl_outl(mask, reg); + local_irq_restore(flags); +} + +void disable_cayman_irq(unsigned int irq) +{ + unsigned long flags; + unsigned long mask; + unsigned int reg; + unsigned char bit; + + irq -= START_EXT_IRQS; + reg = EPLD_MASK_BASE + ((irq / 8) << 2); + bit = 1<<(irq % 8); + local_irq_save(flags); + mask = ctrl_inl(reg); + mask &= ~bit; + ctrl_outl(mask, reg); + local_irq_restore(flags); +} + +static void ack_cayman_irq(unsigned int irq) +{ + disable_cayman_irq(irq); +} + +static void end_cayman_irq(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) + enable_cayman_irq(irq); +} + +static unsigned int startup_cayman_irq(unsigned int irq) +{ + enable_cayman_irq(irq); + return 0; /* never anything pending */ +} + +static void shutdown_cayman_irq(unsigned int irq) +{ + disable_cayman_irq(irq); +} + +struct hw_interrupt_type cayman_irq_type = { + .typename = "Cayman-IRQ", + .startup = startup_cayman_irq, + .shutdown = shutdown_cayman_irq, + .enable = enable_cayman_irq, + .disable = disable_cayman_irq, + .ack = ack_cayman_irq, + .end = end_cayman_irq, +}; + +int cayman_irq_demux(int evt) +{ + int irq = intc_evt_to_irq[evt]; + + if (irq == SMSC_IRQ) { + unsigned long status; + int i; + + status = ctrl_inl(EPLD_STATUS_BASE) & + ctrl_inl(EPLD_MASK_BASE) & 0xff; + if (status == 0) { + irq = -1; + } else { + for (i=0; i<8; i++) { + if (status & (1<<i)) + break; + } + irq = START_EXT_IRQS + i; + } + } + + if (irq == PCI2_IRQ) { + unsigned long status; + int i; + + status = ctrl_inl(EPLD_STATUS_BASE + 3 * sizeof(u32)) & + ctrl_inl(EPLD_MASK_BASE + 3 * sizeof(u32)) & 0xff; + if (status == 0) { + irq = -1; + } else { + for (i=0; i<8; i++) { + if (status & (1<<i)) + break; + } + irq = START_EXT_IRQS + (3 * 8) + i; + } + } + + return irq; +} + +#if defined(CONFIG_PROC_FS) && defined(CONFIG_SYSCTL) +int cayman_irq_describe(char* p, int irq) +{ + if (irq < NR_INTC_IRQS) { + return intc_irq_describe(p, irq); + } else if (irq < NR_INTC_IRQS + 8) { + return sprintf(p, "(SMSC %d)", irq - NR_INTC_IRQS); + } else if ((irq >= NR_INTC_IRQS + 24) && (irq < NR_INTC_IRQS + 32)) { + return sprintf(p, "(PCI2 %d)", irq - (NR_INTC_IRQS + 24)); + } + + return 0; +} +#endif + +void init_cayman_irq(void) +{ + int i; + + epld_virt = onchip_remap(EPLD_BASE, 1024, "EPLD"); + if (!epld_virt) { + printk(KERN_ERR "Cayman IRQ: Unable to remap EPLD\n"); + return; + } + + for (i=0; i<NR_EXT_IRQS; i++) { + irq_desc[START_EXT_IRQS + i].handler = &cayman_irq_type; + } + + /* Setup the SMSC interrupt */ + setup_irq(SMSC_IRQ, &cayman_action_smsc); + setup_irq(PCI2_IRQ, &cayman_action_pci2); +} diff --git a/arch/sh64/mach-cayman/led.c b/arch/sh64/mach-cayman/led.c new file mode 100644 index 0000000..8b3cc4c --- /dev/null +++ b/arch/sh64/mach-cayman/led.c @@ -0,0 +1,51 @@ +/* + * arch/sh64/kernel/led_cayman.c + * + * Copyright (C) 2002 Stuart Menefy <stuart.menefy@st.com> + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * Flash the LEDs + */ +#include <asm/io.h> + +/* +** It is supposed these functions to be used for a low level +** debugging (via Cayman LEDs), hence to be available as soon +** as possible. +** Unfortunately Cayman LEDs relies on Cayman EPLD to be mapped +** (this happen when IRQ are initialized... quite late). +** These triky dependencies should be removed. Temporary, it +** may be enough to NOP until EPLD is mapped. +*/ + +extern unsigned long epld_virt; + +#define LED_ADDR (epld_virt + 0x008) +#define HDSP2534_ADDR (epld_virt + 0x100) + +void mach_led(int position, int value) +{ + if (!epld_virt) + return; + + if (value) + ctrl_outl(0, LED_ADDR); + else + ctrl_outl(1, LED_ADDR); + +} + +void mach_alphanum(int position, unsigned char value) +{ + if (!epld_virt) + return; + + ctrl_outb(value, HDSP2534_ADDR + 0xe0 + (position << 2)); +} + +void mach_alphanum_brightness(int setting) +{ + ctrl_outb(setting & 7, HDSP2534_ADDR + 0xc0); +} diff --git a/arch/sh64/mach-cayman/setup.c b/arch/sh64/mach-cayman/setup.c new file mode 100644 index 0000000..c793245 --- /dev/null +++ b/arch/sh64/mach-cayman/setup.c @@ -0,0 +1,246 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mach-cayman/setup.c + * + * SH5 Cayman support + * + * This file handles the architecture-dependent parts of initialization + * + * Copyright David J. Mckay. + * Needs major work! + * + * benedict.gaster@superh.com: 3rd May 2002 + * Added support for ramdisk, removing statically linked romfs at the same time. + * + * lethal@linux-sh.org: 15th May 2003 + * Use the generic procfs cpuinfo interface, just return a valid board name. + */ + +#include <linux/stddef.h> +#include <linux/init.h> +#include <linux/config.h> +#include <linux/mm.h> +#include <linux/bootmem.h> +#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/seq_file.h> +#include <asm/processor.h> +#include <asm/platform.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/page.h> + +/* + * Platform Dependent Interrupt Priorities. + */ + +/* Using defaults defined in irq.h */ +#define RES NO_PRIORITY /* Disabled */ +#define IR0 IRL0_PRIORITY /* IRLs */ +#define IR1 IRL1_PRIORITY +#define IR2 IRL2_PRIORITY +#define IR3 IRL3_PRIORITY +#define PCA INTA_PRIORITY /* PCI Ints */ +#define PCB INTB_PRIORITY +#define PCC INTC_PRIORITY +#define PCD INTD_PRIORITY +#define SER TOP_PRIORITY +#define ERR TOP_PRIORITY +#define PW0 TOP_PRIORITY +#define PW1 TOP_PRIORITY +#define PW2 TOP_PRIORITY +#define PW3 TOP_PRIORITY +#define DM0 NO_PRIORITY /* DMA Ints */ +#define DM1 NO_PRIORITY +#define DM2 NO_PRIORITY +#define DM3 NO_PRIORITY +#define DAE NO_PRIORITY +#define TU0 TIMER_PRIORITY /* TMU Ints */ +#define TU1 NO_PRIORITY +#define TU2 NO_PRIORITY +#define TI2 NO_PRIORITY +#define ATI NO_PRIORITY /* RTC Ints */ +#define PRI NO_PRIORITY +#define CUI RTC_PRIORITY +#define ERI SCIF_PRIORITY /* SCIF Ints */ +#define RXI SCIF_PRIORITY +#define BRI SCIF_PRIORITY +#define TXI SCIF_PRIORITY +#define ITI TOP_PRIORITY /* WDT Ints */ + +/* Setup for the SMSC FDC37C935 */ +#define SMSC_SUPERIO_BASE 0x04000000 +#define SMSC_CONFIG_PORT_ADDR 0x3f0 +#define SMSC_INDEX_PORT_ADDR SMSC_CONFIG_PORT_ADDR +#define SMSC_DATA_PORT_ADDR 0x3f1 + +#define SMSC_ENTER_CONFIG_KEY 0x55 +#define SMSC_EXIT_CONFIG_KEY 0xaa + +#define SMCS_LOGICAL_DEV_INDEX 0x07 +#define SMSC_DEVICE_ID_INDEX 0x20 +#define SMSC_DEVICE_REV_INDEX 0x21 +#define SMSC_ACTIVATE_INDEX 0x30 +#define SMSC_PRIMARY_BASE_INDEX 0x60 +#define SMSC_SECONDARY_BASE_INDEX 0x62 +#define SMSC_PRIMARY_INT_INDEX 0x70 +#define SMSC_SECONDARY_INT_INDEX 0x72 + +#define SMSC_IDE1_DEVICE 1 +#define SMSC_KEYBOARD_DEVICE 7 +#define SMSC_CONFIG_REGISTERS 8 + +#define SMSC_SUPERIO_READ_INDEXED(index) ({ \ + outb((index), SMSC_INDEX_PORT_ADDR); \ + inb(SMSC_DATA_PORT_ADDR); }) +#define SMSC_SUPERIO_WRITE_INDEXED(val, index) ({ \ + outb((index), SMSC_INDEX_PORT_ADDR); \ + outb((val), SMSC_DATA_PORT_ADDR); }) + +#define IDE1_PRIMARY_BASE 0x01f0 +#define IDE1_SECONDARY_BASE 0x03f6 + +unsigned long smsc_superio_virt; + +/* + * Platform dependent structures: maps and parms block. + */ +struct resource io_resources[] = { + /* To be updated with external devices */ +}; + +struct resource kram_resources[] = { + { "Kernel code", 0, 0 }, /* These must be last in the array */ + { "Kernel data", 0, 0 } /* These must be last in the array */ +}; + +struct resource xram_resources[] = { + /* To be updated with external devices */ +}; + +struct resource rom_resources[] = { + /* To be updated with external devices */ +}; + +struct sh64_platform platform_parms = { + .readonly_rootfs = 1, + .initial_root_dev = 0x0100, + .loader_type = 1, + .io_res_p = io_resources, + .io_res_count = ARRAY_SIZE(io_resources), + .kram_res_p = kram_resources, + .kram_res_count = ARRAY_SIZE(kram_resources), + .xram_res_p = xram_resources, + .xram_res_count = ARRAY_SIZE(xram_resources), + .rom_res_p = rom_resources, + .rom_res_count = ARRAY_SIZE(rom_resources), +}; + +int platform_int_priority[NR_INTC_IRQS] = { + IR0, IR1, IR2, IR3, PCA, PCB, PCC, PCD, /* IRQ 0- 7 */ + RES, RES, RES, RES, SER, ERR, PW3, PW2, /* IRQ 8-15 */ + PW1, PW0, DM0, DM1, DM2, DM3, DAE, RES, /* IRQ 16-23 */ + RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 24-31 */ + TU0, TU1, TU2, TI2, ATI, PRI, CUI, ERI, /* IRQ 32-39 */ + RXI, BRI, TXI, RES, RES, RES, RES, RES, /* IRQ 40-47 */ + RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 48-55 */ + RES, RES, RES, RES, RES, RES, RES, ITI, /* IRQ 56-63 */ +}; + +static int __init smsc_superio_setup(void) +{ + unsigned char devid, devrev; + + smsc_superio_virt = onchip_remap(SMSC_SUPERIO_BASE, 1024, "SMSC SuperIO"); + if (!smsc_superio_virt) { + panic("Unable to remap SMSC SuperIO\n"); + } + + /* Initially the chip is in run state */ + /* Put it into configuration state */ + outb(SMSC_ENTER_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR); + outb(SMSC_ENTER_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR); + + /* Read device ID info */ + devid = SMSC_SUPERIO_READ_INDEXED(SMSC_DEVICE_ID_INDEX); + devrev = SMSC_SUPERIO_READ_INDEXED(SMSC_DEVICE_REV_INDEX); + printk("SMSC SuperIO devid %02x rev %02x\n", devid, devrev); + + /* Select the keyboard device */ + SMSC_SUPERIO_WRITE_INDEXED(SMSC_KEYBOARD_DEVICE, SMCS_LOGICAL_DEV_INDEX); + + /* enable it */ + SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_ACTIVATE_INDEX); + + /* Select the interrupts */ + /* On a PC keyboard is IRQ1, mouse is IRQ12 */ + SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_PRIMARY_INT_INDEX); + SMSC_SUPERIO_WRITE_INDEXED(12, SMSC_SECONDARY_INT_INDEX); + +#ifdef CONFIG_IDE + /* + * Only IDE1 exists on the Cayman + */ + + /* Power it on */ + SMSC_SUPERIO_WRITE_INDEXED(1 << SMSC_IDE1_DEVICE, 0x22); + + SMSC_SUPERIO_WRITE_INDEXED(SMSC_IDE1_DEVICE, SMCS_LOGICAL_DEV_INDEX); + SMSC_SUPERIO_WRITE_INDEXED(1, SMSC_ACTIVATE_INDEX); + + SMSC_SUPERIO_WRITE_INDEXED(IDE1_PRIMARY_BASE >> 8, + SMSC_PRIMARY_BASE_INDEX + 0); + SMSC_SUPERIO_WRITE_INDEXED(IDE1_PRIMARY_BASE & 0xff, + SMSC_PRIMARY_BASE_INDEX + 1); + + SMSC_SUPERIO_WRITE_INDEXED(IDE1_SECONDARY_BASE >> 8, + SMSC_SECONDARY_BASE_INDEX + 0); + SMSC_SUPERIO_WRITE_INDEXED(IDE1_SECONDARY_BASE & 0xff, + SMSC_SECONDARY_BASE_INDEX + 1); + + SMSC_SUPERIO_WRITE_INDEXED(14, SMSC_PRIMARY_INT_INDEX); + + SMSC_SUPERIO_WRITE_INDEXED(SMSC_CONFIG_REGISTERS, + SMCS_LOGICAL_DEV_INDEX); + + SMSC_SUPERIO_WRITE_INDEXED(0x00, 0xc2); /* GP42 = nIDE1_OE */ + SMSC_SUPERIO_WRITE_INDEXED(0x01, 0xc5); /* GP45 = IDE1_IRQ */ + SMSC_SUPERIO_WRITE_INDEXED(0x00, 0xc6); /* GP46 = nIOROP */ + SMSC_SUPERIO_WRITE_INDEXED(0x00, 0xc7); /* GP47 = nIOWOP */ +#endif + + /* Exit the configuraton state */ + outb(SMSC_EXIT_CONFIG_KEY, SMSC_CONFIG_PORT_ADDR); + + return 0; +} + +/* This is grotty, but, because kernel is always referenced on the link line + * before any devices, this is safe. + */ +__initcall(smsc_superio_setup); + +void __init platform_setup(void) +{ + /* Cayman platform leaves the decision to head.S, for now */ + platform_parms.fpu_flags = fpu_in_use; +} + +void __init platform_monitor(void) +{ + /* Nothing yet .. */ +} + +void __init platform_reserve(void) +{ + /* Nothing yet .. */ +} + +const char *get_system_type(void) +{ + return "Hitachi Cayman"; +} + diff --git a/arch/sh64/mach-harp/Makefile b/arch/sh64/mach-harp/Makefile new file mode 100644 index 0000000..63f065b --- /dev/null +++ b/arch/sh64/mach-harp/Makefile @@ -0,0 +1,14 @@ +# +# Makefile for the ST50 Harp specific parts of the kernel +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +O_TARGET := harp.o + +obj-y := setup.o + +include $(TOPDIR)/Rules.make + diff --git a/arch/sh64/mach-harp/setup.c b/arch/sh64/mach-harp/setup.c new file mode 100644 index 0000000..3938a65 --- /dev/null +++ b/arch/sh64/mach-harp/setup.c @@ -0,0 +1,139 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mach-harp/setup.c + * + * SH-5 Simulator Platform Support + * + * This file handles the architecture-dependent parts of initialization + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * + * benedict.gaster@superh.com: 3rd May 2002 + * Added support for ramdisk, removing statically linked romfs at the same time. * + * + * lethal@linux-sh.org: 15th May 2003 + * Use the generic procfs cpuinfo interface, just return a valid board name. + */ + +#include <linux/stddef.h> +#include <linux/init.h> +#include <linux/config.h> +#include <linux/mm.h> +#include <linux/bootmem.h> +#include <linux/delay.h> +#include <linux/kernel.h> +#include <asm/processor.h> +#include <asm/platform.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/page.h> + +#define RES_COUNT(res) ((sizeof((res))/sizeof(struct resource))) + +/* + * Platform Dependent Interrupt Priorities. + */ + +/* Using defaults defined in irq.h */ +#define RES NO_PRIORITY /* Disabled */ +#define IR0 IRL0_PRIORITY /* IRLs */ +#define IR1 IRL1_PRIORITY +#define IR2 IRL2_PRIORITY +#define IR3 IRL3_PRIORITY +#define PCA INTA_PRIORITY /* PCI Ints */ +#define PCB INTB_PRIORITY +#define PCC INTC_PRIORITY +#define PCD INTD_PRIORITY +#define SER TOP_PRIORITY +#define ERR TOP_PRIORITY +#define PW0 TOP_PRIORITY +#define PW1 TOP_PRIORITY +#define PW2 TOP_PRIORITY +#define PW3 TOP_PRIORITY +#define DM0 NO_PRIORITY /* DMA Ints */ +#define DM1 NO_PRIORITY +#define DM2 NO_PRIORITY +#define DM3 NO_PRIORITY +#define DAE NO_PRIORITY +#define TU0 TIMER_PRIORITY /* TMU Ints */ +#define TU1 NO_PRIORITY +#define TU2 NO_PRIORITY +#define TI2 NO_PRIORITY +#define ATI NO_PRIORITY /* RTC Ints */ +#define PRI NO_PRIORITY +#define CUI RTC_PRIORITY +#define ERI SCIF_PRIORITY /* SCIF Ints */ +#define RXI SCIF_PRIORITY +#define BRI SCIF_PRIORITY +#define TXI SCIF_PRIORITY +#define ITI TOP_PRIORITY /* WDT Ints */ + +/* + * Platform dependent structures: maps and parms block. + */ +struct resource io_resources[] = { + /* To be updated with external devices */ +}; + +struct resource kram_resources[] = { + { "Kernel code", 0, 0 }, /* These must be last in the array */ + { "Kernel data", 0, 0 } /* These must be last in the array */ +}; + +struct resource xram_resources[] = { + /* To be updated with external devices */ +}; + +struct resource rom_resources[] = { + /* To be updated with external devices */ +}; + +struct sh64_platform platform_parms = { + .readonly_rootfs = 1, + .initial_root_dev = 0x0100, + .loader_type = 1, + .io_res_p = io_resources, + .io_res_count = RES_COUNT(io_resources), + .kram_res_p = kram_resources, + .kram_res_count = RES_COUNT(kram_resources), + .xram_res_p = xram_resources, + .xram_res_count = RES_COUNT(xram_resources), + .rom_res_p = rom_resources, + .rom_res_count = RES_COUNT(rom_resources), +}; + +int platform_int_priority[NR_INTC_IRQS] = { + IR0, IR1, IR2, IR3, PCA, PCB, PCC, PCD, /* IRQ 0- 7 */ + RES, RES, RES, RES, SER, ERR, PW3, PW2, /* IRQ 8-15 */ + PW1, PW0, DM0, DM1, DM2, DM3, DAE, RES, /* IRQ 16-23 */ + RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 24-31 */ + TU0, TU1, TU2, TI2, ATI, PRI, CUI, ERI, /* IRQ 32-39 */ + RXI, BRI, TXI, RES, RES, RES, RES, RES, /* IRQ 40-47 */ + RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 48-55 */ + RES, RES, RES, RES, RES, RES, RES, ITI, /* IRQ 56-63 */ +}; + +void __init platform_setup(void) +{ + /* Harp platform leaves the decision to head.S, for now */ + platform_parms.fpu_flags = fpu_in_use; +} + +void __init platform_monitor(void) +{ + /* Nothing yet .. */ +} + +void __init platform_reserve(void) +{ + /* Nothing yet .. */ +} + +const char *get_system_type(void) +{ + return "ST50 Harp"; +} + diff --git a/arch/sh64/mach-romram/Makefile b/arch/sh64/mach-romram/Makefile new file mode 100644 index 0000000..02d05c0 --- /dev/null +++ b/arch/sh64/mach-romram/Makefile @@ -0,0 +1,14 @@ +# +# Makefile for the SH-5 ROM/RAM specific parts of the kernel +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +O_TARGET := romram.o + +obj-y := setup.o + +include $(TOPDIR)/Rules.make + diff --git a/arch/sh64/mach-romram/setup.c b/arch/sh64/mach-romram/setup.c new file mode 100644 index 0000000..a9ba03f --- /dev/null +++ b/arch/sh64/mach-romram/setup.c @@ -0,0 +1,142 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mach-romram/setup.c + * + * SH-5 ROM/RAM Platform Support + * + * This file handles the architecture-dependent parts of initialization + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * + * benedict.gaster@superh.com: 3rd May 2002 + * Added support for ramdisk, removing statically linked romfs at the same time. * + * + * lethal@linux-sh.org: 15th May 2003 + * Use the generic procfs cpuinfo interface, just return a valid board name. + * + * Sean.McGoogan@superh.com 17th Feb 2004 + * copied from arch/sh64/mach-harp/setup.c + */ + +#include <linux/stddef.h> +#include <linux/init.h> +#include <linux/config.h> +#include <linux/mm.h> +#include <linux/bootmem.h> +#include <linux/delay.h> +#include <linux/kernel.h> +#include <asm/processor.h> +#include <asm/platform.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/page.h> + +#define RES_COUNT(res) ((sizeof((res))/sizeof(struct resource))) + +/* + * Platform Dependent Interrupt Priorities. + */ + +/* Using defaults defined in irq.h */ +#define RES NO_PRIORITY /* Disabled */ +#define IR0 IRL0_PRIORITY /* IRLs */ +#define IR1 IRL1_PRIORITY +#define IR2 IRL2_PRIORITY +#define IR3 IRL3_PRIORITY +#define PCA INTA_PRIORITY /* PCI Ints */ +#define PCB INTB_PRIORITY +#define PCC INTC_PRIORITY +#define PCD INTD_PRIORITY +#define SER TOP_PRIORITY +#define ERR TOP_PRIORITY +#define PW0 TOP_PRIORITY +#define PW1 TOP_PRIORITY +#define PW2 TOP_PRIORITY +#define PW3 TOP_PRIORITY +#define DM0 NO_PRIORITY /* DMA Ints */ +#define DM1 NO_PRIORITY +#define DM2 NO_PRIORITY +#define DM3 NO_PRIORITY +#define DAE NO_PRIORITY +#define TU0 TIMER_PRIORITY /* TMU Ints */ +#define TU1 NO_PRIORITY +#define TU2 NO_PRIORITY +#define TI2 NO_PRIORITY +#define ATI NO_PRIORITY /* RTC Ints */ +#define PRI NO_PRIORITY +#define CUI RTC_PRIORITY +#define ERI SCIF_PRIORITY /* SCIF Ints */ +#define RXI SCIF_PRIORITY +#define BRI SCIF_PRIORITY +#define TXI SCIF_PRIORITY +#define ITI TOP_PRIORITY /* WDT Ints */ + +/* + * Platform dependent structures: maps and parms block. + */ +struct resource io_resources[] = { + /* To be updated with external devices */ +}; + +struct resource kram_resources[] = { + { "Kernel code", 0, 0 }, /* These must be last in the array */ + { "Kernel data", 0, 0 } /* These must be last in the array */ +}; + +struct resource xram_resources[] = { + /* To be updated with external devices */ +}; + +struct resource rom_resources[] = { + /* To be updated with external devices */ +}; + +struct sh64_platform platform_parms = { + .readonly_rootfs = 1, + .initial_root_dev = 0x0100, + .loader_type = 1, + .io_res_p = io_resources, + .io_res_count = RES_COUNT(io_resources), + .kram_res_p = kram_resources, + .kram_res_count = RES_COUNT(kram_resources), + .xram_res_p = xram_resources, + .xram_res_count = RES_COUNT(xram_resources), + .rom_res_p = rom_resources, + .rom_res_count = RES_COUNT(rom_resources), +}; + +int platform_int_priority[NR_INTC_IRQS] = { + IR0, IR1, IR2, IR3, PCA, PCB, PCC, PCD, /* IRQ 0- 7 */ + RES, RES, RES, RES, SER, ERR, PW3, PW2, /* IRQ 8-15 */ + PW1, PW0, DM0, DM1, DM2, DM3, DAE, RES, /* IRQ 16-23 */ + RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 24-31 */ + TU0, TU1, TU2, TI2, ATI, PRI, CUI, ERI, /* IRQ 32-39 */ + RXI, BRI, TXI, RES, RES, RES, RES, RES, /* IRQ 40-47 */ + RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 48-55 */ + RES, RES, RES, RES, RES, RES, RES, ITI, /* IRQ 56-63 */ +}; + +void __init platform_setup(void) +{ + /* ROM/RAM platform leaves the decision to head.S, for now */ + platform_parms.fpu_flags = fpu_in_use; +} + +void __init platform_monitor(void) +{ + /* Nothing yet .. */ +} + +void __init platform_reserve(void) +{ + /* Nothing yet .. */ +} + +const char *get_system_type(void) +{ + return "ROM/RAM"; +} + diff --git a/arch/sh64/mach-sim/Makefile b/arch/sh64/mach-sim/Makefile new file mode 100644 index 0000000..819c407 --- /dev/null +++ b/arch/sh64/mach-sim/Makefile @@ -0,0 +1,14 @@ +# +# Makefile for the SH-5 Simulator specific parts of the kernel +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +O_TARGET := sim.o + +obj-y := setup.o + +include $(TOPDIR)/Rules.make + diff --git a/arch/sh64/mach-sim/setup.c b/arch/sh64/mach-sim/setup.c new file mode 100644 index 0000000..a68639c --- /dev/null +++ b/arch/sh64/mach-sim/setup.c @@ -0,0 +1,164 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mach-sim/setup.c + * + * ST50 Simulator Platform Support + * + * This file handles the architecture-dependent parts of initialization + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * + * lethal@linux-sh.org: 15th May 2003 + * Use the generic procfs cpuinfo interface, just return a valid board name. + */ + +#include <linux/stddef.h> +#include <linux/init.h> +#include <linux/config.h> +#include <linux/mm.h> +#include <linux/bootmem.h> +#include <linux/delay.h> +#include <linux/kernel.h> +#include <asm/addrspace.h> +#include <asm/processor.h> +#include <asm/platform.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/page.h> + +#ifdef CONFIG_BLK_DEV_INITRD +#include "../rootfs/rootfs.h" +#endif + +static __init void platform_monitor(void); +static __init void platform_setup(void); +static __init void platform_reserve(void); + + +#define PHYS_MEMORY CONFIG_MEMORY_SIZE_IN_MB*1024*1024 + +#if (PHYS_MEMORY < P1SEG_FOOTPRINT_RAM) +#error "Invalid kernel configuration. Physical memory below footprint requirements." +#endif + +#define RAM_DISK_START CONFIG_MEMORY_START+P1SEG_INITRD_BLOCK /* Top of 4MB */ +#ifdef PLATFORM_ROMFS_SIZE +#define RAM_DISK_SIZE (PAGE_ALIGN(PLATFORM_ROMFS_SIZE)) /* Variable Top */ +#if ((RAM_DISK_START + RAM_DISK_SIZE) > (CONFIG_MEMORY_START + PHYS_MEMORY)) +#error "Invalid kernel configuration. ROM RootFS exceeding physical memory." +#endif +#else +#define RAM_DISK_SIZE P1SEG_INITRD_BLOCK_SIZE /* Top of 4MB */ +#endif + +#define RES_COUNT(res) ((sizeof((res))/sizeof(struct resource))) + +/* + * Platform Dependent Interrupt Priorities. + */ + +/* Using defaults defined in irq.h */ +#define RES NO_PRIORITY /* Disabled */ +#define IR0 IRL0_PRIORITY /* IRLs */ +#define IR1 IRL1_PRIORITY +#define IR2 IRL2_PRIORITY +#define IR3 IRL3_PRIORITY +#define PCA INTA_PRIORITY /* PCI Ints */ +#define PCB INTB_PRIORITY +#define PCC INTC_PRIORITY +#define PCD INTD_PRIORITY +#define SER TOP_PRIORITY +#define ERR TOP_PRIORITY +#define PW0 TOP_PRIORITY +#define PW1 TOP_PRIORITY +#define PW2 TOP_PRIORITY +#define PW3 TOP_PRIORITY +#define DM0 NO_PRIORITY /* DMA Ints */ +#define DM1 NO_PRIORITY +#define DM2 NO_PRIORITY +#define DM3 NO_PRIORITY +#define DAE NO_PRIORITY +#define TU0 TIMER_PRIORITY /* TMU Ints */ +#define TU1 NO_PRIORITY +#define TU2 NO_PRIORITY +#define TI2 NO_PRIORITY +#define ATI NO_PRIORITY /* RTC Ints */ +#define PRI NO_PRIORITY +#define CUI RTC_PRIORITY +#define ERI SCIF_PRIORITY /* SCIF Ints */ +#define RXI SCIF_PRIORITY +#define BRI SCIF_PRIORITY +#define TXI SCIF_PRIORITY +#define ITI TOP_PRIORITY /* WDT Ints */ + +/* + * Platform dependent structures: maps and parms block. + */ +struct resource io_resources[] = { + /* Nothing yet .. */ +}; + +struct resource kram_resources[] = { + { "Kernel code", 0, 0 }, /* These must be last in the array */ + { "Kernel data", 0, 0 } /* These must be last in the array */ +}; + +struct resource xram_resources[] = { + /* Nothing yet .. */ +}; + +struct resource rom_resources[] = { + /* Nothing yet .. */ +}; + +struct sh64_platform platform_parms = { + .readonly_rootfs = 1, + .initial_root_dev = 0x0100, + .loader_type = 1, + .initrd_start = RAM_DISK_START, + .initrd_size = RAM_DISK_SIZE, + .io_res_p = io_resources, + .io_res_count = RES_COUNT(io_resources), + .kram_res_p = kram_resources, + .kram_res_count = RES_COUNT(kram_resources), + .xram_res_p = xram_resources, + .xram_res_count = RES_COUNT(xram_resources), + .rom_res_p = rom_resources, + .rom_res_count = RES_COUNT(rom_resources), +}; + +int platform_int_priority[NR_IRQS] = { + IR0, IR1, IR2, IR3, PCA, PCB, PCC, PCD, /* IRQ 0- 7 */ + RES, RES, RES, RES, SER, ERR, PW3, PW2, /* IRQ 8-15 */ + PW1, PW0, DM0, DM1, DM2, DM3, DAE, RES, /* IRQ 16-23 */ + RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 24-31 */ + TU0, TU1, TU2, TI2, ATI, PRI, CUI, ERI, /* IRQ 32-39 */ + RXI, BRI, TXI, RES, RES, RES, RES, RES, /* IRQ 40-47 */ + RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 48-55 */ + RES, RES, RES, RES, RES, RES, RES, ITI, /* IRQ 56-63 */ +}; + +void __init platform_setup(void) +{ + /* Simulator platform leaves the decision to head.S */ + platform_parms.fpu_flags = fpu_in_use; +} + +void __init platform_monitor(void) +{ + /* Nothing yet .. */ +} + +void __init platform_reserve(void) +{ + /* Nothing yet .. */ +} + +const char *get_system_type(void) +{ + return "SH-5 Simulator"; +} + diff --git a/arch/sh64/mm/Makefile b/arch/sh64/mm/Makefile new file mode 100644 index 0000000..ff19378 --- /dev/null +++ b/arch/sh64/mm/Makefile @@ -0,0 +1,44 @@ +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2000, 2001 Paolo Alberelli +# Copyright (C) 2003, 2004 Paul Mundt +# +# Makefile for the sh64-specific parts of the Linux memory manager. +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +obj-y := init.o fault.o ioremap.o extable.o cache.o tlbmiss.o tlb.o + +obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o + +# Special flags for tlbmiss.o. This puts restrictions on the number of +# caller-save registers that the compiler can target when building this file. +# This is required because the code is called from a context in entry.S where +# very few registers have been saved in the exception handler (for speed +# reasons). +# The caller save registers that have been saved and which can be used are +# r2,r3,r4,r5 : argument passing +# r15, r18 : SP and LINK +# tr0-4 : allow all caller-save TR's. The compiler seems to be able to make +# use of them, so it's probably beneficial to performance to save them +# and have them available for it. +# +# The resources not listed below are callee save, i.e. the compiler is free to +# use any of them and will spill them to the stack itself. + +CFLAGS_tlbmiss.o += -ffixed-r7 \ + -ffixed-r8 -ffixed-r9 -ffixed-r10 -ffixed-r11 -ffixed-r12 \ + -ffixed-r13 -ffixed-r14 -ffixed-r16 -ffixed-r17 -ffixed-r19 \ + -ffixed-r20 -ffixed-r21 -ffixed-r22 -ffixed-r23 \ + -ffixed-r24 -ffixed-r25 -ffixed-r26 -ffixed-r27 \ + -ffixed-r36 -ffixed-r37 -ffixed-r38 -ffixed-r39 -ffixed-r40 \ + -ffixed-r41 -ffixed-r42 -ffixed-r43 \ + -ffixed-r60 -ffixed-r61 -ffixed-r62 \ + -fomit-frame-pointer + diff --git a/arch/sh64/mm/cache.c b/arch/sh64/mm/cache.c new file mode 100644 index 0000000..3b87e25 --- /dev/null +++ b/arch/sh64/mm/cache.c @@ -0,0 +1,1041 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mm/cache.c + * + * Original version Copyright (C) 2000, 2001 Paolo Alberelli + * Second version Copyright (C) benedict.gaster@superh.com 2002 + * Third version Copyright Richard.Curnow@superh.com 2003 + * Hacks to third version Copyright (C) 2003 Paul Mundt + */ + +/****************************************************************************/ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/mman.h> +#include <linux/mm.h> +#include <linux/threads.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/processor.h> +#include <asm/cache.h> +#include <asm/tlb.h> +#include <asm/io.h> +#include <asm/uaccess.h> +#include <asm/mmu_context.h> +#include <asm/pgalloc.h> /* for flush_itlb_range */ + +#include <linux/proc_fs.h> + +/* This function is in entry.S */ +extern unsigned long switch_and_save_asid(unsigned long new_asid); + +/* Wired TLB entry for the D-cache */ +static unsigned long long dtlb_cache_slot; + +/** + * sh64_cache_init() + * + * This is pretty much just a straightforward clone of the SH + * detect_cpu_and_cache_system(). + * + * This function is responsible for setting up all of the cache + * info dynamically as well as taking care of CPU probing and + * setting up the relevant subtype data. + * + * FIXME: For the time being, we only really support the SH5-101 + * out of the box, and don't support dynamic probing for things + * like the SH5-103 or even cut2 of the SH5-101. Implement this + * later! + */ +int __init sh64_cache_init(void) +{ + /* + * First, setup some sane values for the I-cache. + */ + cpu_data->icache.ways = 4; + cpu_data->icache.sets = 256; + cpu_data->icache.linesz = L1_CACHE_BYTES; + + /* + * FIXME: This can probably be cleaned up a bit as well.. for example, + * do we really need the way shift _and_ the way_step_shift ?? Judging + * by the existing code, I would guess no.. is there any valid reason + * why we need to be tracking this around? + */ + cpu_data->icache.way_shift = 13; + cpu_data->icache.entry_shift = 5; + cpu_data->icache.set_shift = 4; + cpu_data->icache.way_step_shift = 16; + cpu_data->icache.asid_shift = 2; + + /* + * way offset = cache size / associativity, so just don't factor in + * associativity in the first place.. + */ + cpu_data->icache.way_ofs = cpu_data->icache.sets * + cpu_data->icache.linesz; + + cpu_data->icache.asid_mask = 0x3fc; + cpu_data->icache.idx_mask = 0x1fe0; + cpu_data->icache.epn_mask = 0xffffe000; + cpu_data->icache.flags = 0; + + /* + * Next, setup some sane values for the D-cache. + * + * On the SH5, these are pretty consistent with the I-cache settings, + * so we just copy over the existing definitions.. these can be fixed + * up later, especially if we add runtime CPU probing. + * + * Though in the meantime it saves us from having to duplicate all of + * the above definitions.. + */ + cpu_data->dcache = cpu_data->icache; + + /* + * Setup any cache-related flags here + */ +#if defined(CONFIG_DCACHE_WRITE_THROUGH) + set_bit(SH_CACHE_MODE_WT, &(cpu_data->dcache.flags)); +#elif defined(CONFIG_DCACHE_WRITE_BACK) + set_bit(SH_CACHE_MODE_WB, &(cpu_data->dcache.flags)); +#endif + + /* + * We also need to reserve a slot for the D-cache in the DTLB, so we + * do this now .. + */ + dtlb_cache_slot = sh64_get_wired_dtlb_entry(); + + return 0; +} + +#ifdef CONFIG_DCACHE_DISABLED +#define sh64_dcache_purge_all() do { } while (0) +#define sh64_dcache_purge_coloured_phy_page(paddr, eaddr) do { } while (0) +#define sh64_dcache_purge_user_range(mm, start, end) do { } while (0) +#define sh64_dcache_purge_phy_page(paddr) do { } while (0) +#define sh64_dcache_purge_virt_page(mm, eaddr) do { } while (0) +#define sh64_dcache_purge_kernel_range(start, end) do { } while (0) +#define sh64_dcache_wback_current_user_range(start, end) do { } while (0) +#endif + +/*##########################################################################*/ + +/* From here onwards, a rewrite of the implementation, + by Richard.Curnow@superh.com. + + The major changes in this compared to the old version are; + 1. use more selective purging through OCBP instead of using ALLOCO to purge + by natural replacement. This avoids purging out unrelated cache lines + that happen to be in the same set. + 2. exploit the APIs copy_user_page and clear_user_page better + 3. be more selective about I-cache purging, in particular use invalidate_all + more sparingly. + + */ + +/*########################################################################## + SUPPORT FUNCTIONS + ##########################################################################*/ + +/****************************************************************************/ +/* The following group of functions deal with mapping and unmapping a temporary + page into the DTLB slot that have been set aside for our exclusive use. */ +/* In order to accomplish this, we use the generic interface for adding and + removing a wired slot entry as defined in arch/sh64/mm/tlb.c */ +/****************************************************************************/ + +static unsigned long slot_own_flags; + +static inline void sh64_setup_dtlb_cache_slot(unsigned long eaddr, unsigned long asid, unsigned long paddr) +{ + local_irq_save(slot_own_flags); + sh64_setup_tlb_slot(dtlb_cache_slot, eaddr, asid, paddr); +} + +static inline void sh64_teardown_dtlb_cache_slot(void) +{ + sh64_teardown_tlb_slot(dtlb_cache_slot); + local_irq_restore(slot_own_flags); +} + +/****************************************************************************/ + +#ifndef CONFIG_ICACHE_DISABLED + +static void __inline__ sh64_icache_inv_all(void) +{ + unsigned long long addr, flag, data; + unsigned int flags; + + addr=ICCR0; + flag=ICCR0_ICI; + data=0; + + /* Make this a critical section for safety (probably not strictly necessary.) */ + local_irq_save(flags); + + /* Without %1 it gets unexplicably wrong */ + asm volatile("getcfg %3, 0, %0\n\t" + "or %0, %2, %0\n\t" + "putcfg %3, 0, %0\n\t" + "synci" + : "=&r" (data) + : "0" (data), "r" (flag), "r" (addr)); + + local_irq_restore(flags); +} + +static void sh64_icache_inv_kernel_range(unsigned long start, unsigned long end) +{ + /* Invalidate range of addresses [start,end] from the I-cache, where + * the addresses lie in the kernel superpage. */ + + unsigned long long ullend, addr, aligned_start; +#if (NEFF == 32) + aligned_start = (unsigned long long)(signed long long)(signed long) start; +#else +#error "NEFF != 32" +#endif + aligned_start &= L1_CACHE_ALIGN_MASK; + addr = aligned_start; +#if (NEFF == 32) + ullend = (unsigned long long) (signed long long) (signed long) end; +#else +#error "NEFF != 32" +#endif + while (addr <= ullend) { + asm __volatile__ ("icbi %0, 0" : : "r" (addr)); + addr += L1_CACHE_BYTES; + } +} + +static void sh64_icache_inv_user_page(struct vm_area_struct *vma, unsigned long eaddr) +{ + /* If we get called, we know that vma->vm_flags contains VM_EXEC. + Also, eaddr is page-aligned. */ + + unsigned long long addr, end_addr; + unsigned long flags = 0; + unsigned long running_asid, vma_asid; + addr = eaddr; + end_addr = addr + PAGE_SIZE; + + /* Check whether we can use the current ASID for the I-cache + invalidation. For example, if we're called via + access_process_vm->flush_cache_page->here, (e.g. when reading from + /proc), 'running_asid' will be that of the reader, not of the + victim. + + Also, note the risk that we might get pre-empted between the ASID + compare and blocking IRQs, and before we regain control, the + pid->ASID mapping changes. However, the whole cache will get + invalidated when the mapping is renewed, so the worst that can + happen is that the loop below ends up invalidating somebody else's + cache entries. + */ + + running_asid = get_asid(); + vma_asid = (vma->vm_mm->context & MMU_CONTEXT_ASID_MASK); + if (running_asid != vma_asid) { + local_irq_save(flags); + switch_and_save_asid(vma_asid); + } + while (addr < end_addr) { + /* Worth unrolling a little */ + asm __volatile__("icbi %0, 0" : : "r" (addr)); + asm __volatile__("icbi %0, 32" : : "r" (addr)); + asm __volatile__("icbi %0, 64" : : "r" (addr)); + asm __volatile__("icbi %0, 96" : : "r" (addr)); + addr += 128; + } + if (running_asid != vma_asid) { + switch_and_save_asid(running_asid); + local_irq_restore(flags); + } +} + +/****************************************************************************/ + +static void sh64_icache_inv_user_page_range(struct mm_struct *mm, + unsigned long start, unsigned long end) +{ + /* Used for invalidating big chunks of I-cache, i.e. assume the range + is whole pages. If 'start' or 'end' is not page aligned, the code + is conservative and invalidates to the ends of the enclosing pages. + This is functionally OK, just a performance loss. */ + + /* See the comments below in sh64_dcache_purge_user_range() regarding + the choice of algorithm. However, for the I-cache option (2) isn't + available because there are no physical tags so aliases can't be + resolved. The icbi instruction has to be used through the user + mapping. Because icbi is cheaper than ocbp on a cache hit, it + would be cheaper to use the selective code for a large range than is + possible with the D-cache. Just assume 64 for now as a working + figure. + */ + + int n_pages; + + if (!mm) return; + + n_pages = ((end - start) >> PAGE_SHIFT); + if (n_pages >= 64) { + sh64_icache_inv_all(); + } else { + unsigned long aligned_start; + unsigned long eaddr; + unsigned long after_last_page_start; + unsigned long mm_asid, current_asid; + unsigned long long flags = 0ULL; + + mm_asid = mm->context & MMU_CONTEXT_ASID_MASK; + current_asid = get_asid(); + + if (mm_asid != current_asid) { + /* Switch ASID and run the invalidate loop under cli */ + local_irq_save(flags); + switch_and_save_asid(mm_asid); + } + + aligned_start = start & PAGE_MASK; + after_last_page_start = PAGE_SIZE + ((end - 1) & PAGE_MASK); + + while (aligned_start < after_last_page_start) { + struct vm_area_struct *vma; + unsigned long vma_end; + vma = find_vma(mm, aligned_start); + if (!vma || (aligned_start <= vma->vm_end)) { + /* Avoid getting stuck in an error condition */ + aligned_start += PAGE_SIZE; + continue; + } + vma_end = vma->vm_end; + if (vma->vm_flags & VM_EXEC) { + /* Executable */ + eaddr = aligned_start; + while (eaddr < vma_end) { + sh64_icache_inv_user_page(vma, eaddr); + eaddr += PAGE_SIZE; + } + } + aligned_start = vma->vm_end; /* Skip to start of next region */ + } + if (mm_asid != current_asid) { + switch_and_save_asid(current_asid); + local_irq_restore(flags); + } + } +} + +static void sh64_icache_inv_user_small_range(struct mm_struct *mm, + unsigned long start, int len) +{ + + /* Invalidate a small range of user context I-cache, not necessarily + page (or even cache-line) aligned. */ + + unsigned long long eaddr = start; + unsigned long long eaddr_end = start + len; + unsigned long current_asid, mm_asid; + unsigned long long flags; + unsigned long long epage_start; + + /* Since this is used inside ptrace, the ASID in the mm context + typically won't match current_asid. We'll have to switch ASID to do + this. For safety, and given that the range will be small, do all + this under cli. + + Note, there is a hazard that the ASID in mm->context is no longer + actually associated with mm, i.e. if the mm->context has started a + new cycle since mm was last active. However, this is just a + performance issue: all that happens is that we invalidate lines + belonging to another mm, so the owning process has to refill them + when that mm goes live again. mm itself can't have any cache + entries because there will have been a flush_cache_all when the new + mm->context cycle started. */ + + /* Align to start of cache line. Otherwise, suppose len==8 and start + was at 32N+28 : the last 4 bytes wouldn't get invalidated. */ + eaddr = start & L1_CACHE_ALIGN_MASK; + eaddr_end = start + len; + + local_irq_save(flags); + mm_asid = mm->context & MMU_CONTEXT_ASID_MASK; + current_asid = switch_and_save_asid(mm_asid); + + epage_start = eaddr & PAGE_MASK; + + while (eaddr < eaddr_end) + { + asm __volatile__("icbi %0, 0" : : "r" (eaddr)); + eaddr += L1_CACHE_BYTES; + } + switch_and_save_asid(current_asid); + local_irq_restore(flags); +} + +static void sh64_icache_inv_current_user_range(unsigned long start, unsigned long end) +{ + /* The icbi instruction never raises ITLBMISS. i.e. if there's not a + cache hit on the virtual tag the instruction ends there, without a + TLB lookup. */ + + unsigned long long aligned_start; + unsigned long long ull_end; + unsigned long long addr; + + ull_end = end; + + /* Just invalidate over the range using the natural addresses. TLB + miss handling will be OK (TBC). Since it's for the current process, + either we're already in the right ASID context, or the ASIDs have + been recycled since we were last active in which case we might just + invalidate another processes I-cache entries : no worries, just a + performance drop for him. */ + aligned_start = start & L1_CACHE_ALIGN_MASK; + addr = aligned_start; + while (addr < ull_end) { + asm __volatile__ ("icbi %0, 0" : : "r" (addr)); + asm __volatile__ ("nop"); + asm __volatile__ ("nop"); + addr += L1_CACHE_BYTES; + } +} + +#endif /* !CONFIG_ICACHE_DISABLED */ + +/****************************************************************************/ + +#ifndef CONFIG_DCACHE_DISABLED + +/* Buffer used as the target of alloco instructions to purge data from cache + sets by natural eviction. -- RPC */ +#define DUMMY_ALLOCO_AREA_SIZE L1_CACHE_SIZE_BYTES + (1024 * 4) +static unsigned char dummy_alloco_area[DUMMY_ALLOCO_AREA_SIZE] __cacheline_aligned = { 0, }; + +/****************************************************************************/ + +static void __inline__ sh64_dcache_purge_sets(int sets_to_purge_base, int n_sets) +{ + /* Purge all ways in a particular block of sets, specified by the base + set number and number of sets. Can handle wrap-around, if that's + needed. */ + + int dummy_buffer_base_set; + unsigned long long eaddr, eaddr0, eaddr1; + int j; + int set_offset; + + dummy_buffer_base_set = ((int)&dummy_alloco_area & cpu_data->dcache.idx_mask) >> cpu_data->dcache.entry_shift; + set_offset = sets_to_purge_base - dummy_buffer_base_set; + + for (j=0; j<n_sets; j++, set_offset++) { + set_offset &= (cpu_data->dcache.sets - 1); + eaddr0 = (unsigned long long)dummy_alloco_area + (set_offset << cpu_data->dcache.entry_shift); + + /* Do one alloco which hits the required set per cache way. For + write-back mode, this will purge the #ways resident lines. There's + little point unrolling this loop because the allocos stall more if + they're too close together. */ + eaddr1 = eaddr0 + cpu_data->dcache.way_ofs * cpu_data->dcache.ways; + for (eaddr=eaddr0; eaddr<eaddr1; eaddr+=cpu_data->dcache.way_ofs) { + asm __volatile__ ("alloco %0, 0" : : "r" (eaddr)); + asm __volatile__ ("synco"); /* TAKum03020 */ + } + + eaddr1 = eaddr0 + cpu_data->dcache.way_ofs * cpu_data->dcache.ways; + for (eaddr=eaddr0; eaddr<eaddr1; eaddr+=cpu_data->dcache.way_ofs) { + /* Load from each address. Required because alloco is a NOP if + the cache is write-through. Write-through is a config option. */ + if (test_bit(SH_CACHE_MODE_WT, &(cpu_data->dcache.flags))) + *(volatile unsigned char *)(int)eaddr; + } + } + + /* Don't use OCBI to invalidate the lines. That costs cycles directly. + If the dummy block is just left resident, it will naturally get + evicted as required. */ + + return; +} + +/****************************************************************************/ + +static void sh64_dcache_purge_all(void) +{ + /* Purge the entire contents of the dcache. The most efficient way to + achieve this is to use alloco instructions on a region of unused + memory equal in size to the cache, thereby causing the current + contents to be discarded by natural eviction. The alternative, + namely reading every tag, setting up a mapping for the corresponding + page and doing an OCBP for the line, would be much more expensive. + */ + + sh64_dcache_purge_sets(0, cpu_data->dcache.sets); + + return; + +} + +/****************************************************************************/ + +static void sh64_dcache_purge_kernel_range(unsigned long start, unsigned long end) +{ + /* Purge the range of addresses [start,end] from the D-cache. The + addresses lie in the superpage mapping. There's no harm if we + overpurge at either end - just a small performance loss. */ + unsigned long long ullend, addr, aligned_start; +#if (NEFF == 32) + aligned_start = (unsigned long long)(signed long long)(signed long) start; +#else +#error "NEFF != 32" +#endif + aligned_start &= L1_CACHE_ALIGN_MASK; + addr = aligned_start; +#if (NEFF == 32) + ullend = (unsigned long long) (signed long long) (signed long) end; +#else +#error "NEFF != 32" +#endif + while (addr <= ullend) { + asm __volatile__ ("ocbp %0, 0" : : "r" (addr)); + addr += L1_CACHE_BYTES; + } + return; +} + +/* Assumes this address (+ (2**n_synbits) pages up from it) aren't used for + anything else in the kernel */ +#define MAGIC_PAGE0_START 0xffffffffec000000ULL + +static void sh64_dcache_purge_coloured_phy_page(unsigned long paddr, unsigned long eaddr) +{ + /* Purge the physical page 'paddr' from the cache. It's known that any + cache lines requiring attention have the same page colour as the the + address 'eaddr'. + + This relies on the fact that the D-cache matches on physical tags + when no virtual tag matches. So we create an alias for the original + page and purge through that. (Alternatively, we could have done + this by switching ASID to match the original mapping and purged + through that, but that involves ASID switching cost + probably a + TLBMISS + refill anyway.) + */ + + unsigned long long magic_page_start; + unsigned long long magic_eaddr, magic_eaddr_end; + + magic_page_start = MAGIC_PAGE0_START + (eaddr & CACHE_OC_SYN_MASK); + + /* As long as the kernel is not pre-emptible, this doesn't need to be + under cli/sti. */ + + sh64_setup_dtlb_cache_slot(magic_page_start, get_asid(), paddr); + + magic_eaddr = magic_page_start; + magic_eaddr_end = magic_eaddr + PAGE_SIZE; + while (magic_eaddr < magic_eaddr_end) { + /* Little point in unrolling this loop - the OCBPs are blocking + and won't go any quicker (i.e. the loop overhead is parallel + to part of the OCBP execution.) */ + asm __volatile__ ("ocbp %0, 0" : : "r" (magic_eaddr)); + magic_eaddr += L1_CACHE_BYTES; + } + + sh64_teardown_dtlb_cache_slot(); +} + +/****************************************************************************/ + +static void sh64_dcache_purge_phy_page(unsigned long paddr) +{ + /* Pure a page given its physical start address, by creating a + temporary 1 page mapping and purging across that. Even if we know + the virtual address (& vma or mm) of the page, the method here is + more elegant because it avoids issues of coping with page faults on + the purge instructions (i.e. no special-case code required in the + critical path in the TLB miss handling). */ + + unsigned long long eaddr_start, eaddr, eaddr_end; + int i; + + /* As long as the kernel is not pre-emptible, this doesn't need to be + under cli/sti. */ + + eaddr_start = MAGIC_PAGE0_START; + for (i=0; i < (1 << CACHE_OC_N_SYNBITS); i++) { + sh64_setup_dtlb_cache_slot(eaddr_start, get_asid(), paddr); + + eaddr = eaddr_start; + eaddr_end = eaddr + PAGE_SIZE; + while (eaddr < eaddr_end) { + asm __volatile__ ("ocbp %0, 0" : : "r" (eaddr)); + eaddr += L1_CACHE_BYTES; + } + + sh64_teardown_dtlb_cache_slot(); + eaddr_start += PAGE_SIZE; + } +} + +static void sh64_dcache_purge_user_page(struct mm_struct *mm, unsigned long eaddr) +{ + pgd_t *pgd; + pmd_t *pmd; + pte_t *pte; + pte_t entry; + unsigned long paddr; + + /* NOTE : all the callers of this have mm->page_table_lock held, so the + following page table traversal is safe even on SMP/pre-emptible. */ + + if (!mm) return; /* No way to find physical address of page */ + pgd = pgd_offset(mm, eaddr); + if (pgd_bad(*pgd)) return; + + pmd = pmd_offset(pgd, eaddr); + if (pmd_none(*pmd) || pmd_bad(*pmd)) return; + + pte = pte_offset_kernel(pmd, eaddr); + entry = *pte; + if (pte_none(entry) || !pte_present(entry)) return; + + paddr = pte_val(entry) & PAGE_MASK; + + sh64_dcache_purge_coloured_phy_page(paddr, eaddr); + +} +/****************************************************************************/ + +static void sh64_dcache_purge_user_range(struct mm_struct *mm, + unsigned long start, unsigned long end) +{ + /* There are at least 5 choices for the implementation of this, with + pros (+), cons(-), comments(*): + + 1. ocbp each line in the range through the original user's ASID + + no lines spuriously evicted + - tlbmiss handling (must either handle faults on demand => extra + special-case code in tlbmiss critical path), or map the page in + advance (=> flush_tlb_range in advance to avoid multiple hits) + - ASID switching + - expensive for large ranges + + 2. temporarily map each page in the range to a special effective + address and ocbp through the temporary mapping; relies on the + fact that SH-5 OCB* always do TLB lookup and match on ptags (they + never look at the etags) + + no spurious evictions + - expensive for large ranges + * surely cheaper than (1) + + 3. walk all the lines in the cache, check the tags, if a match + occurs create a page mapping to ocbp the line through + + no spurious evictions + - tag inspection overhead + - (especially for small ranges) + - potential cost of setting up/tearing down page mapping for + every line that matches the range + * cost partly independent of range size + + 4. walk all the lines in the cache, check the tags, if a match + occurs use 4 * alloco to purge the line (+3 other probably + innocent victims) by natural eviction + + no tlb mapping overheads + - spurious evictions + - tag inspection overhead + + 5. implement like flush_cache_all + + no tag inspection overhead + - spurious evictions + - bad for small ranges + + (1) can be ruled out as more expensive than (2). (2) appears best + for small ranges. The choice between (3), (4) and (5) for large + ranges and the range size for the large/small boundary need + benchmarking to determine. + + For now use approach (2) for small ranges and (5) for large ones. + + */ + + int n_pages; + + n_pages = ((end - start) >> PAGE_SHIFT); + if (n_pages >= 64) { +#if 1 + sh64_dcache_purge_all(); +#else + unsigned long long set, way; + unsigned long mm_asid = mm->context & MMU_CONTEXT_ASID_MASK; + for (set = 0; set < cpu_data->dcache.sets; set++) { + unsigned long long set_base_config_addr = CACHE_OC_ADDRESS_ARRAY + (set << cpu_data->dcache.set_shift); + for (way = 0; way < cpu_data->dcache.ways; way++) { + unsigned long long config_addr = set_base_config_addr + (way << cpu_data->dcache.way_step_shift); + unsigned long long tag0; + unsigned long line_valid; + + asm __volatile__("getcfg %1, 0, %0" : "=r" (tag0) : "r" (config_addr)); + line_valid = tag0 & SH_CACHE_VALID; + if (line_valid) { + unsigned long cache_asid; + unsigned long epn; + + cache_asid = (tag0 & cpu_data->dcache.asid_mask) >> cpu_data->dcache.asid_shift; + /* The next line needs some + explanation. The virtual tags + encode bits [31:13] of the virtual + address, bit [12] of the 'tag' being + implied by the cache set index. */ + epn = (tag0 & cpu_data->dcache.epn_mask) | ((set & 0x80) << cpu_data->dcache.entry_shift); + + if ((cache_asid == mm_asid) && (start <= epn) && (epn < end)) { + /* TODO : could optimise this + call by batching multiple + adjacent sets together. */ + sh64_dcache_purge_sets(set, 1); + break; /* Don't waste time inspecting other ways for this set */ + } + } + } + } +#endif + } else { + /* 'Small' range */ + unsigned long aligned_start; + unsigned long eaddr; + unsigned long last_page_start; + + aligned_start = start & PAGE_MASK; + /* 'end' is 1 byte beyond the end of the range */ + last_page_start = (end - 1) & PAGE_MASK; + + eaddr = aligned_start; + while (eaddr <= last_page_start) { + sh64_dcache_purge_user_page(mm, eaddr); + eaddr += PAGE_SIZE; + } + } + return; +} + +static void sh64_dcache_wback_current_user_range(unsigned long start, unsigned long end) +{ + unsigned long long aligned_start; + unsigned long long ull_end; + unsigned long long addr; + + ull_end = end; + + /* Just wback over the range using the natural addresses. TLB miss + handling will be OK (TBC) : the range has just been written to by + the signal frame setup code, so the PTEs must exist. + + Note, if we have CONFIG_PREEMPT and get preempted inside this loop, + it doesn't matter, even if the pid->ASID mapping changes whilst + we're away. In that case the cache will have been flushed when the + mapping was renewed. So the writebacks below will be nugatory (and + we'll doubtless have to fault the TLB entry/ies in again with the + new ASID), but it's a rare case. + */ + aligned_start = start & L1_CACHE_ALIGN_MASK; + addr = aligned_start; + while (addr < ull_end) { + asm __volatile__ ("ocbwb %0, 0" : : "r" (addr)); + addr += L1_CACHE_BYTES; + } +} + +/****************************************************************************/ + +/* These *MUST* lie in an area of virtual address space that's otherwise unused. */ +#define UNIQUE_EADDR_START 0xe0000000UL +#define UNIQUE_EADDR_END 0xe8000000UL + +static unsigned long sh64_make_unique_eaddr(unsigned long user_eaddr, unsigned long paddr) +{ + /* Given a physical address paddr, and a user virtual address + user_eaddr which will eventually be mapped to it, create a one-off + kernel-private eaddr mapped to the same paddr. This is used for + creating special destination pages for copy_user_page and + clear_user_page */ + + static unsigned long current_pointer = UNIQUE_EADDR_START; + unsigned long coloured_pointer; + + if (current_pointer == UNIQUE_EADDR_END) { + sh64_dcache_purge_all(); + current_pointer = UNIQUE_EADDR_START; + } + + coloured_pointer = (current_pointer & ~CACHE_OC_SYN_MASK) | (user_eaddr & CACHE_OC_SYN_MASK); + sh64_setup_dtlb_cache_slot(coloured_pointer, get_asid(), paddr); + + current_pointer += (PAGE_SIZE << CACHE_OC_N_SYNBITS); + + return coloured_pointer; +} + +/****************************************************************************/ + +static void sh64_copy_user_page_coloured(void *to, void *from, unsigned long address) +{ + void *coloured_to; + + /* Discard any existing cache entries of the wrong colour. These are + present quite often, if the kernel has recently used the page + internally, then given it up, then it's been allocated to the user. + */ + sh64_dcache_purge_coloured_phy_page(__pa(to), (unsigned long) to); + + coloured_to = (void *) sh64_make_unique_eaddr(address, __pa(to)); + sh64_page_copy(from, coloured_to); + + sh64_teardown_dtlb_cache_slot(); +} + +static void sh64_clear_user_page_coloured(void *to, unsigned long address) +{ + void *coloured_to; + + /* Discard any existing kernel-originated lines of the wrong colour (as + above) */ + sh64_dcache_purge_coloured_phy_page(__pa(to), (unsigned long) to); + + coloured_to = (void *) sh64_make_unique_eaddr(address, __pa(to)); + sh64_page_clear(coloured_to); + + sh64_teardown_dtlb_cache_slot(); +} + +#endif /* !CONFIG_DCACHE_DISABLED */ + +/****************************************************************************/ + +/*########################################################################## + EXTERNALLY CALLABLE API. + ##########################################################################*/ + +/* These functions are described in Documentation/cachetlb.txt. + Each one of these functions varies in behaviour depending on whether the + I-cache and/or D-cache are configured out. + + Note that the Linux term 'flush' corresponds to what is termed 'purge' in + the sh/sh64 jargon for the D-cache, i.e. write back dirty data then + invalidate the cache lines, and 'invalidate' for the I-cache. + */ + +#undef FLUSH_TRACE + +void flush_cache_all(void) +{ + /* Invalidate the entire contents of both caches, after writing back to + memory any dirty data from the D-cache. */ + sh64_dcache_purge_all(); + sh64_icache_inv_all(); +} + +/****************************************************************************/ + +void flush_cache_mm(struct mm_struct *mm) +{ + /* Invalidate an entire user-address space from both caches, after + writing back dirty data (e.g. for shared mmap etc). */ + + /* This could be coded selectively by inspecting all the tags then + doing 4*alloco on any set containing a match (as for + flush_cache_range), but fork/exit/execve (where this is called from) + are expensive anyway. */ + + /* Have to do a purge here, despite the comments re I-cache below. + There could be odd-coloured dirty data associated with the mm still + in the cache - if this gets written out through natural eviction + after the kernel has reused the page there will be chaos. + */ + + sh64_dcache_purge_all(); + + /* The mm being torn down won't ever be active again, so any Icache + lines tagged with its ASID won't be visible for the rest of the + lifetime of this ASID cycle. Before the ASID gets reused, there + will be a flush_cache_all. Hence we don't need to touch the + I-cache. This is similar to the lack of action needed in + flush_tlb_mm - see fault.c. */ +} + +/****************************************************************************/ + +void flush_cache_range(struct vm_area_struct *vma, unsigned long start, + unsigned long end) +{ + struct mm_struct *mm = vma->vm_mm; + + /* Invalidate (from both caches) the range [start,end) of virtual + addresses from the user address space specified by mm, after writing + back any dirty data. + + Note(1), 'end' is 1 byte beyond the end of the range to flush. + + Note(2), this is called with mm->page_table_lock held.*/ + + sh64_dcache_purge_user_range(mm, start, end); + sh64_icache_inv_user_page_range(mm, start, end); +} + +/****************************************************************************/ + +void flush_cache_page(struct vm_area_struct *vma, unsigned long eaddr, unsigned long pfn) +{ + /* Invalidate any entries in either cache for the vma within the user + address space vma->vm_mm for the page starting at virtual address + 'eaddr'. This seems to be used primarily in breaking COW. Note, + the I-cache must be searched too in case the page in question is + both writable and being executed from (e.g. stack trampolines.) + + Note(1), this is called with mm->page_table_lock held. + */ + + sh64_dcache_purge_phy_page(pfn << PAGE_SHIFT); + + if (vma->vm_flags & VM_EXEC) { + sh64_icache_inv_user_page(vma, eaddr); + } +} + +/****************************************************************************/ + +#ifndef CONFIG_DCACHE_DISABLED + +void copy_user_page(void *to, void *from, unsigned long address, struct page *page) +{ + /* 'from' and 'to' are kernel virtual addresses (within the superpage + mapping of the physical RAM). 'address' is the user virtual address + where the copy 'to' will be mapped after. This allows a custom + mapping to be used to ensure that the new copy is placed in the + right cache sets for the user to see it without having to bounce it + out via memory. Note however : the call to flush_page_to_ram in + (generic)/mm/memory.c:(break_cow) undoes all this good work in that one + very important case! + + TBD : can we guarantee that on every call, any cache entries for + 'from' are in the same colour sets as 'address' also? i.e. is this + always used just to deal with COW? (I suspect not). */ + + /* There are two possibilities here for when the page 'from' was last accessed: + * by the kernel : this is OK, no purge required. + * by the/a user (e.g. for break_COW) : need to purge. + + If the potential user mapping at 'address' is the same colour as + 'from' there is no need to purge any cache lines from the 'from' + page mapped into cache sets of colour 'address'. (The copy will be + accessing the page through 'from'). + */ + + if (((address ^ (unsigned long) from) & CACHE_OC_SYN_MASK) != 0) { + sh64_dcache_purge_coloured_phy_page(__pa(from), address); + } + + if (((address ^ (unsigned long) to) & CACHE_OC_SYN_MASK) == 0) { + /* No synonym problem on destination */ + sh64_page_copy(from, to); + } else { + sh64_copy_user_page_coloured(to, from, address); + } + + /* Note, don't need to flush 'from' page from the cache again - it's + done anyway by the generic code */ +} + +void clear_user_page(void *to, unsigned long address, struct page *page) +{ + /* 'to' is a kernel virtual address (within the superpage + mapping of the physical RAM). 'address' is the user virtual address + where the 'to' page will be mapped after. This allows a custom + mapping to be used to ensure that the new copy is placed in the + right cache sets for the user to see it without having to bounce it + out via memory. + */ + + if (((address ^ (unsigned long) to) & CACHE_OC_SYN_MASK) == 0) { + /* No synonym problem on destination */ + sh64_page_clear(to); + } else { + sh64_clear_user_page_coloured(to, address); + } +} + +#endif /* !CONFIG_DCACHE_DISABLED */ + +/****************************************************************************/ + +void flush_dcache_page(struct page *page) +{ + sh64_dcache_purge_phy_page(page_to_phys(page)); + wmb(); +} + +/****************************************************************************/ + +void flush_icache_range(unsigned long start, unsigned long end) +{ + /* Flush the range [start,end] of kernel virtual adddress space from + the I-cache. The corresponding range must be purged from the + D-cache also because the SH-5 doesn't have cache snooping between + the caches. The addresses will be visible through the superpage + mapping, therefore it's guaranteed that there no cache entries for + the range in cache sets of the wrong colour. + + Primarily used for cohering the I-cache after a module has + been loaded. */ + + /* We also make sure to purge the same range from the D-cache since + flush_page_to_ram() won't be doing this for us! */ + + sh64_dcache_purge_kernel_range(start, end); + wmb(); + sh64_icache_inv_kernel_range(start, end); +} + +/****************************************************************************/ + +void flush_icache_user_range(struct vm_area_struct *vma, + struct page *page, unsigned long addr, int len) +{ + /* Flush the range of user (defined by vma->vm_mm) address space + starting at 'addr' for 'len' bytes from the cache. The range does + not straddle a page boundary, the unique physical page containing + the range is 'page'. This seems to be used mainly for invalidating + an address range following a poke into the program text through the + ptrace() call from another process (e.g. for BRK instruction + insertion). */ + + sh64_dcache_purge_coloured_phy_page(page_to_phys(page), addr); + mb(); + + if (vma->vm_flags & VM_EXEC) { + sh64_icache_inv_user_small_range(vma->vm_mm, addr, len); + } +} + +/*########################################################################## + ARCH/SH64 PRIVATE CALLABLE API. + ##########################################################################*/ + +void flush_cache_sigtramp(unsigned long start, unsigned long end) +{ + /* For the address range [start,end), write back the data from the + D-cache and invalidate the corresponding region of the I-cache for + the current process. Used to flush signal trampolines on the stack + to make them executable. */ + + sh64_dcache_wback_current_user_range(start, end); + wmb(); + sh64_icache_inv_current_user_range(start, end); +} + diff --git a/arch/sh64/mm/extable.c b/arch/sh64/mm/extable.c new file mode 100644 index 0000000..9da50e28b --- /dev/null +++ b/arch/sh64/mm/extable.c @@ -0,0 +1,81 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mm/extable.c + * + * Copyright (C) 2003 Richard Curnow + * Copyright (C) 2003, 2004 Paul Mundt + * + * Cloned from the 2.5 SH version.. + */ +#include <linux/config.h> +#include <linux/rwsem.h> +#include <linux/module.h> +#include <asm/uaccess.h> + +extern unsigned long copy_user_memcpy, copy_user_memcpy_end; +extern void __copy_user_fixup(void); + +static const struct exception_table_entry __copy_user_fixup_ex = { + .fixup = (unsigned long)&__copy_user_fixup, +}; + +/* Some functions that may trap due to a bad user-mode address have too many loads + and stores in them to make it at all practical to label each one and put them all in + the main exception table. + + In particular, the fast memcpy routine is like this. It's fix-up is just to fall back + to a slow byte-at-a-time copy, which is handled the conventional way. So it's functionally + OK to just handle any trap occurring in the fast memcpy with that fixup. */ +static const struct exception_table_entry *check_exception_ranges(unsigned long addr) +{ + if ((addr >= (unsigned long)©_user_memcpy) && + (addr <= (unsigned long)©_user_memcpy_end)) + return &__copy_user_fixup_ex; + + return NULL; +} + +/* Simple binary search */ +const struct exception_table_entry * +search_extable(const struct exception_table_entry *first, + const struct exception_table_entry *last, + unsigned long value) +{ + const struct exception_table_entry *mid; + + mid = check_exception_ranges(value); + if (mid) + return mid; + + while (first <= last) { + long diff; + + mid = (last - first) / 2 + first; + diff = mid->insn - value; + if (diff == 0) + return mid; + else if (diff < 0) + first = mid+1; + else + last = mid-1; + } + + return NULL; +} + +int fixup_exception(struct pt_regs *regs) +{ + const struct exception_table_entry *fixup; + + fixup = search_exception_tables(regs->pc); + if (fixup) { + regs->pc = fixup->fixup; + return 1; + } + + return 0; +} + diff --git a/arch/sh64/mm/fault.c b/arch/sh64/mm/fault.c new file mode 100644 index 0000000..a249328 --- /dev/null +++ b/arch/sh64/mm/fault.c @@ -0,0 +1,601 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mm/fault.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003 Richard Curnow (/proc/tlb, bug fixes) + * Copyright (C) 2003 Paul Mundt + * + */ + +#include <linux/signal.h> +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/ptrace.h> +#include <linux/mman.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/interrupt.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/tlb.h> +#include <asm/uaccess.h> +#include <asm/pgalloc.h> +#include <asm/mmu_context.h> +#include <asm/registers.h> /* required by inline asm statements */ + +#if defined(CONFIG_SH64_PROC_TLB) +#include <linux/init.h> +#include <linux/proc_fs.h> +/* Count numbers of tlb refills in each region */ +static unsigned long long calls_to_update_mmu_cache = 0ULL; +static unsigned long long calls_to_flush_tlb_page = 0ULL; +static unsigned long long calls_to_flush_tlb_range = 0ULL; +static unsigned long long calls_to_flush_tlb_mm = 0ULL; +static unsigned long long calls_to_flush_tlb_all = 0ULL; +unsigned long long calls_to_do_slow_page_fault = 0ULL; +unsigned long long calls_to_do_fast_page_fault = 0ULL; + +/* Count size of ranges for flush_tlb_range */ +static unsigned long long flush_tlb_range_1 = 0ULL; +static unsigned long long flush_tlb_range_2 = 0ULL; +static unsigned long long flush_tlb_range_3_4 = 0ULL; +static unsigned long long flush_tlb_range_5_7 = 0ULL; +static unsigned long long flush_tlb_range_8_11 = 0ULL; +static unsigned long long flush_tlb_range_12_15 = 0ULL; +static unsigned long long flush_tlb_range_16_up = 0ULL; + +static unsigned long long page_not_present = 0ULL; + +#endif + +extern void die(const char *,struct pt_regs *,long); + +#define PFLAG(val,flag) (( (val) & (flag) ) ? #flag : "" ) +#define PPROT(flag) PFLAG(pgprot_val(prot),flag) + +static inline void print_prots(pgprot_t prot) +{ + printk("prot is 0x%08lx\n",pgprot_val(prot)); + + printk("%s %s %s %s %s\n",PPROT(_PAGE_SHARED),PPROT(_PAGE_READ), + PPROT(_PAGE_EXECUTE),PPROT(_PAGE_WRITE),PPROT(_PAGE_USER)); +} + +static inline void print_vma(struct vm_area_struct *vma) +{ + printk("vma start 0x%08lx\n", vma->vm_start); + printk("vma end 0x%08lx\n", vma->vm_end); + + print_prots(vma->vm_page_prot); + printk("vm_flags 0x%08lx\n", vma->vm_flags); +} + +static inline void print_task(struct task_struct *tsk) +{ + printk("Task pid %d\n", tsk->pid); +} + +static pte_t *lookup_pte(struct mm_struct *mm, unsigned long address) +{ + pgd_t *dir; + pmd_t *pmd; + pte_t *pte; + pte_t entry; + + dir = pgd_offset(mm, address); + if (pgd_none(*dir)) { + return NULL; + } + + pmd = pmd_offset(dir, address); + if (pmd_none(*pmd)) { + return NULL; + } + + pte = pte_offset_kernel(pmd, address); + entry = *pte; + + if (pte_none(entry)) { + return NULL; + } + if (!pte_present(entry)) { + return NULL; + } + + return pte; +} + +/* + * This routine handles page faults. It determines the address, + * and the problem, and then passes it off to one of the appropriate + * routines. + */ +asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess, + unsigned long textaccess, unsigned long address) +{ + struct task_struct *tsk; + struct mm_struct *mm; + struct vm_area_struct * vma; + const struct exception_table_entry *fixup; + pte_t *pte; + +#if defined(CONFIG_SH64_PROC_TLB) + ++calls_to_do_slow_page_fault; +#endif + + /* SIM + * Note this is now called with interrupts still disabled + * This is to cope with being called for a missing IO port + * address with interupts disabled. This should be fixed as + * soon as we have a better 'fast path' miss handler. + * + * Plus take care how you try and debug this stuff. + * For example, writing debug data to a port which you + * have just faulted on is not going to work. + */ + + tsk = current; + mm = tsk->mm; + + /* Not an IO address, so reenable interrupts */ + local_irq_enable(); + + /* + * If we're in an interrupt or have no user + * context, we must not take the fault.. + */ + if (in_interrupt() || !mm) + goto no_context; + + /* TLB misses upon some cache flushes get done under cli() */ + down_read(&mm->mmap_sem); + + vma = find_vma(mm, address); + + if (!vma) { +#ifdef DEBUG_FAULT + print_task(tsk); + printk("%s:%d fault, address is 0x%08x PC %016Lx textaccess %d writeaccess %d\n", + __FUNCTION__,__LINE__, + address,regs->pc,textaccess,writeaccess); + show_regs(regs); +#endif + goto bad_area; + } + if (vma->vm_start <= address) { + goto good_area; + } + + if (!(vma->vm_flags & VM_GROWSDOWN)) { +#ifdef DEBUG_FAULT + print_task(tsk); + printk("%s:%d fault, address is 0x%08x PC %016Lx textaccess %d writeaccess %d\n", + __FUNCTION__,__LINE__, + address,regs->pc,textaccess,writeaccess); + show_regs(regs); + + print_vma(vma); +#endif + goto bad_area; + } + if (expand_stack(vma, address)) { +#ifdef DEBUG_FAULT + print_task(tsk); + printk("%s:%d fault, address is 0x%08x PC %016Lx textaccess %d writeaccess %d\n", + __FUNCTION__,__LINE__, + address,regs->pc,textaccess,writeaccess); + show_regs(regs); +#endif + goto bad_area; + } +/* + * Ok, we have a good vm_area for this memory access, so + * we can handle it.. + */ +good_area: + if (textaccess) { + if (!(vma->vm_flags & VM_EXEC)) + goto bad_area; + } else { + if (writeaccess) { + if (!(vma->vm_flags & VM_WRITE)) + goto bad_area; + } else { + if (!(vma->vm_flags & VM_READ)) + goto bad_area; + } + } + + /* + * If for any reason at all we couldn't handle the fault, + * make sure we exit gracefully rather than endlessly redo + * the fault. + */ +survive: + switch (handle_mm_fault(mm, vma, address, writeaccess)) { + case 1: + tsk->min_flt++; + break; + case 2: + tsk->maj_flt++; + break; + case 0: + goto do_sigbus; + default: + goto out_of_memory; + } + /* If we get here, the page fault has been handled. Do the TLB refill + now from the newly-setup PTE, to avoid having to fault again right + away on the same instruction. */ + pte = lookup_pte (mm, address); + if (!pte) { + /* From empirical evidence, we can get here, due to + !pte_present(pte). (e.g. if a swap-in occurs, and the page + is swapped back out again before the process that wanted it + gets rescheduled?) */ + goto no_pte; + } + + __do_tlb_refill(address, textaccess, pte); + +no_pte: + + up_read(&mm->mmap_sem); + return; + +/* + * Something tried to access memory that isn't in our memory map.. + * Fix it, but check if it's kernel or user first.. + */ +bad_area: +#ifdef DEBUG_FAULT + printk("fault:bad area\n"); +#endif + up_read(&mm->mmap_sem); + + if (user_mode(regs)) { + static int count=0; + siginfo_t info; + if (count < 4) { + /* This is really to help debug faults when starting + * usermode, so only need a few */ + count++; + printk("user mode bad_area address=%08lx pid=%d (%s) pc=%08lx\n", + address, current->pid, current->comm, + (unsigned long) regs->pc); +#if 0 + show_regs(regs); +#endif + } + if (tsk->pid == 1) { + panic("INIT had user mode bad_area\n"); + } + tsk->thread.address = address; + tsk->thread.error_code = writeaccess; + info.si_signo = SIGSEGV; + info.si_errno = 0; + info.si_addr = (void *) address; + force_sig_info(SIGSEGV, &info, tsk); + return; + } + +no_context: +#ifdef DEBUG_FAULT + printk("fault:No context\n"); +#endif + /* Are we prepared to handle this kernel fault? */ + fixup = search_exception_tables(regs->pc); + if (fixup) { + regs->pc = fixup->fixup; + return; + } + +/* + * Oops. The kernel tried to access some bad page. We'll have to + * terminate things with extreme prejudice. + * + */ + if (address < PAGE_SIZE) + printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference"); + else + printk(KERN_ALERT "Unable to handle kernel paging request"); + printk(" at virtual address %08lx\n", address); + printk(KERN_ALERT "pc = %08Lx%08Lx\n", regs->pc >> 32, regs->pc & 0xffffffff); + die("Oops", regs, writeaccess); + do_exit(SIGKILL); + +/* + * We ran out of memory, or some other thing happened to us that made + * us unable to handle the page fault gracefully. + */ +out_of_memory: + if (current->pid == 1) { + panic("INIT out of memory\n"); + yield(); + goto survive; + } + printk("fault:Out of memory\n"); + up_read(&mm->mmap_sem); + if (current->pid == 1) { + yield(); + down_read(&mm->mmap_sem); + goto survive; + } + printk("VM: killing process %s\n", tsk->comm); + if (user_mode(regs)) + do_exit(SIGKILL); + goto no_context; + +do_sigbus: + printk("fault:Do sigbus\n"); + up_read(&mm->mmap_sem); + + /* + * Send a sigbus, regardless of whether we were in kernel + * or user mode. + */ + tsk->thread.address = address; + tsk->thread.error_code = writeaccess; + tsk->thread.trap_no = 14; + force_sig(SIGBUS, tsk); + + /* Kernel mode? Handle exceptions or die */ + if (!user_mode(regs)) + goto no_context; +} + + +void flush_tlb_all(void); + +void update_mmu_cache(struct vm_area_struct * vma, + unsigned long address, pte_t pte) +{ +#if defined(CONFIG_SH64_PROC_TLB) + ++calls_to_update_mmu_cache; +#endif + + /* + * This appears to get called once for every pte entry that gets + * established => I don't think it's efficient to try refilling the + * TLBs with the pages - some may not get accessed even. Also, for + * executable pages, it is impossible to determine reliably here which + * TLB they should be mapped into (or both even). + * + * So, just do nothing here and handle faults on demand. In the + * TLBMISS handling case, the refill is now done anyway after the pte + * has been fixed up, so that deals with most useful cases. + */ +} + +static void __flush_tlb_page(struct vm_area_struct *vma, unsigned long page) +{ + unsigned long long match, pteh=0, lpage; + unsigned long tlb; + struct mm_struct *mm; + + mm = vma->vm_mm; + + if (mm->context == NO_CONTEXT) + return; + + /* + * Sign-extend based on neff. + */ + lpage = (page & NEFF_SIGN) ? (page | NEFF_MASK) : page; + match = ((mm->context & MMU_CONTEXT_ASID_MASK) << PTEH_ASID_SHIFT) | PTEH_VALID; + match |= lpage; + + /* Do ITLB : don't bother for pages in non-exectutable VMAs */ + if (vma->vm_flags & VM_EXEC) { + for_each_itlb_entry(tlb) { + asm volatile ("getcfg %1, 0, %0" + : "=r" (pteh) + : "r" (tlb) ); + + if (pteh == match) { + __flush_tlb_slot(tlb); + break; + } + + } + } + + /* Do DTLB : any page could potentially be in here. */ + for_each_dtlb_entry(tlb) { + asm volatile ("getcfg %1, 0, %0" + : "=r" (pteh) + : "r" (tlb) ); + + if (pteh == match) { + __flush_tlb_slot(tlb); + break; + } + + } +} + +void flush_tlb_page(struct vm_area_struct *vma, unsigned long page) +{ + unsigned long flags; + +#if defined(CONFIG_SH64_PROC_TLB) + ++calls_to_flush_tlb_page; +#endif + + if (vma->vm_mm) { + page &= PAGE_MASK; + local_irq_save(flags); + __flush_tlb_page(vma, page); + local_irq_restore(flags); + } +} + +void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, + unsigned long end) +{ + unsigned long flags; + unsigned long long match, pteh=0, pteh_epn, pteh_low; + unsigned long tlb; + struct mm_struct *mm; + + mm = vma->vm_mm; + +#if defined(CONFIG_SH64_PROC_TLB) + ++calls_to_flush_tlb_range; + + { + unsigned long size = (end - 1) - start; + size >>= 12; /* divide by PAGE_SIZE */ + size++; /* end=start+4096 => 1 page */ + switch (size) { + case 1 : flush_tlb_range_1++; break; + case 2 : flush_tlb_range_2++; break; + case 3 ... 4 : flush_tlb_range_3_4++; break; + case 5 ... 7 : flush_tlb_range_5_7++; break; + case 8 ... 11 : flush_tlb_range_8_11++; break; + case 12 ... 15 : flush_tlb_range_12_15++; break; + default : flush_tlb_range_16_up++; break; + } + } +#endif + + if (mm->context == NO_CONTEXT) + return; + + local_irq_save(flags); + + start &= PAGE_MASK; + end &= PAGE_MASK; + + match = ((mm->context & MMU_CONTEXT_ASID_MASK) << PTEH_ASID_SHIFT) | PTEH_VALID; + + /* Flush ITLB */ + for_each_itlb_entry(tlb) { + asm volatile ("getcfg %1, 0, %0" + : "=r" (pteh) + : "r" (tlb) ); + + pteh_epn = pteh & PAGE_MASK; + pteh_low = pteh & ~PAGE_MASK; + + if (pteh_low == match && pteh_epn >= start && pteh_epn <= end) + __flush_tlb_slot(tlb); + } + + /* Flush DTLB */ + for_each_dtlb_entry(tlb) { + asm volatile ("getcfg %1, 0, %0" + : "=r" (pteh) + : "r" (tlb) ); + + pteh_epn = pteh & PAGE_MASK; + pteh_low = pteh & ~PAGE_MASK; + + if (pteh_low == match && pteh_epn >= start && pteh_epn <= end) + __flush_tlb_slot(tlb); + } + + local_irq_restore(flags); +} + +void flush_tlb_mm(struct mm_struct *mm) +{ + unsigned long flags; + +#if defined(CONFIG_SH64_PROC_TLB) + ++calls_to_flush_tlb_mm; +#endif + + if (mm->context == NO_CONTEXT) + return; + + local_irq_save(flags); + + mm->context=NO_CONTEXT; + if(mm==current->mm) + activate_context(mm); + + local_irq_restore(flags); + +} + +void flush_tlb_all(void) +{ + /* Invalidate all, including shared pages, excluding fixed TLBs */ + + unsigned long flags, tlb; + +#if defined(CONFIG_SH64_PROC_TLB) + ++calls_to_flush_tlb_all; +#endif + + local_irq_save(flags); + + /* Flush each ITLB entry */ + for_each_itlb_entry(tlb) { + __flush_tlb_slot(tlb); + } + + /* Flush each DTLB entry */ + for_each_dtlb_entry(tlb) { + __flush_tlb_slot(tlb); + } + + local_irq_restore(flags); +} + +void flush_tlb_kernel_range(unsigned long start, unsigned long end) +{ + /* FIXME: Optimize this later.. */ + flush_tlb_all(); +} + +#if defined(CONFIG_SH64_PROC_TLB) +/* Procfs interface to read the performance information */ + +static int +tlb_proc_info(char *buf, char **start, off_t fpos, int length, int *eof, void *data) +{ + int len=0; + len += sprintf(buf+len, "do_fast_page_fault called %12lld times\n", calls_to_do_fast_page_fault); + len += sprintf(buf+len, "do_slow_page_fault called %12lld times\n", calls_to_do_slow_page_fault); + len += sprintf(buf+len, "update_mmu_cache called %12lld times\n", calls_to_update_mmu_cache); + len += sprintf(buf+len, "flush_tlb_page called %12lld times\n", calls_to_flush_tlb_page); + len += sprintf(buf+len, "flush_tlb_range called %12lld times\n", calls_to_flush_tlb_range); + len += sprintf(buf+len, "flush_tlb_mm called %12lld times\n", calls_to_flush_tlb_mm); + len += sprintf(buf+len, "flush_tlb_all called %12lld times\n", calls_to_flush_tlb_all); + len += sprintf(buf+len, "flush_tlb_range_sizes\n" + " 1 : %12lld\n" + " 2 : %12lld\n" + " 3 - 4 : %12lld\n" + " 5 - 7 : %12lld\n" + " 8 - 11 : %12lld\n" + "12 - 15 : %12lld\n" + "16+ : %12lld\n", + flush_tlb_range_1, flush_tlb_range_2, flush_tlb_range_3_4, + flush_tlb_range_5_7, flush_tlb_range_8_11, flush_tlb_range_12_15, + flush_tlb_range_16_up); + len += sprintf(buf+len, "page not present %12lld times\n", page_not_present); + *eof = 1; + return len; +} + +static int __init register_proc_tlb(void) +{ + create_proc_read_entry("tlb", 0, NULL, tlb_proc_info, NULL); + return 0; +} + +__initcall(register_proc_tlb); + +#endif diff --git a/arch/sh64/mm/hugetlbpage.c b/arch/sh64/mm/hugetlbpage.c new file mode 100644 index 0000000..bcad2ae --- /dev/null +++ b/arch/sh64/mm/hugetlbpage.c @@ -0,0 +1,264 @@ +/* + * arch/sh64/mm/hugetlbpage.c + * + * SuperH HugeTLB page support. + * + * Cloned from sparc64 by Paul Mundt. + * + * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com) + */ + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/mm.h> +#include <linux/hugetlb.h> +#include <linux/pagemap.h> +#include <linux/smp_lock.h> +#include <linux/slab.h> +#include <linux/sysctl.h> + +#include <asm/mman.h> +#include <asm/pgalloc.h> +#include <asm/tlb.h> +#include <asm/tlbflush.h> +#include <asm/cacheflush.h> + +static pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr) +{ + pgd_t *pgd; + pmd_t *pmd; + pte_t *pte = NULL; + + pgd = pgd_offset(mm, addr); + if (pgd) { + pmd = pmd_alloc(mm, pgd, addr); + if (pmd) + pte = pte_alloc_map(mm, pmd, addr); + } + return pte; +} + +static pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) +{ + pgd_t *pgd; + pmd_t *pmd; + pte_t *pte = NULL; + + pgd = pgd_offset(mm, addr); + if (pgd) { + pmd = pmd_offset(pgd, addr); + if (pmd) + pte = pte_offset_map(pmd, addr); + } + return pte; +} + +#define mk_pte_huge(entry) do { pte_val(entry) |= _PAGE_SZHUGE; } while (0) + +static void set_huge_pte(struct mm_struct *mm, struct vm_area_struct *vma, + struct page *page, pte_t * page_table, int write_access) +{ + unsigned long i; + pte_t entry; + + add_mm_counter(mm, rss, HPAGE_SIZE / PAGE_SIZE); + + if (write_access) + entry = pte_mkwrite(pte_mkdirty(mk_pte(page, + vma->vm_page_prot))); + else + entry = pte_wrprotect(mk_pte(page, vma->vm_page_prot)); + entry = pte_mkyoung(entry); + mk_pte_huge(entry); + + for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) { + set_pte(page_table, entry); + page_table++; + + pte_val(entry) += PAGE_SIZE; + } +} + +/* + * This function checks for proper alignment of input addr and len parameters. + */ +int is_aligned_hugepage_range(unsigned long addr, unsigned long len) +{ + if (len & ~HPAGE_MASK) + return -EINVAL; + if (addr & ~HPAGE_MASK) + return -EINVAL; + return 0; +} + +int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src, + struct vm_area_struct *vma) +{ + pte_t *src_pte, *dst_pte, entry; + struct page *ptepage; + unsigned long addr = vma->vm_start; + unsigned long end = vma->vm_end; + int i; + + while (addr < end) { + dst_pte = huge_pte_alloc(dst, addr); + if (!dst_pte) + goto nomem; + src_pte = huge_pte_offset(src, addr); + BUG_ON(!src_pte || pte_none(*src_pte)); + entry = *src_pte; + ptepage = pte_page(entry); + get_page(ptepage); + for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) { + set_pte(dst_pte, entry); + pte_val(entry) += PAGE_SIZE; + dst_pte++; + } + add_mm_counter(dst, rss, HPAGE_SIZE / PAGE_SIZE); + addr += HPAGE_SIZE; + } + return 0; + +nomem: + return -ENOMEM; +} + +int follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, + struct page **pages, struct vm_area_struct **vmas, + unsigned long *position, int *length, int i) +{ + unsigned long vaddr = *position; + int remainder = *length; + + WARN_ON(!is_vm_hugetlb_page(vma)); + + while (vaddr < vma->vm_end && remainder) { + if (pages) { + pte_t *pte; + struct page *page; + + pte = huge_pte_offset(mm, vaddr); + + /* hugetlb should be locked, and hence, prefaulted */ + BUG_ON(!pte || pte_none(*pte)); + + page = pte_page(*pte); + + WARN_ON(!PageCompound(page)); + + get_page(page); + pages[i] = page; + } + + if (vmas) + vmas[i] = vma; + + vaddr += PAGE_SIZE; + --remainder; + ++i; + } + + *length = remainder; + *position = vaddr; + + return i; +} + +struct page *follow_huge_addr(struct mm_struct *mm, + unsigned long address, int write) +{ + return ERR_PTR(-EINVAL); +} + +int pmd_huge(pmd_t pmd) +{ + return 0; +} + +struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, + pmd_t *pmd, int write) +{ + return NULL; +} + +void unmap_hugepage_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + struct mm_struct *mm = vma->vm_mm; + unsigned long address; + pte_t *pte; + struct page *page; + int i; + + BUG_ON(start & (HPAGE_SIZE - 1)); + BUG_ON(end & (HPAGE_SIZE - 1)); + + for (address = start; address < end; address += HPAGE_SIZE) { + pte = huge_pte_offset(mm, address); + BUG_ON(!pte); + if (pte_none(*pte)) + continue; + page = pte_page(*pte); + put_page(page); + for (i = 0; i < (1 << HUGETLB_PAGE_ORDER); i++) { + pte_clear(mm, address+(i*PAGE_SIZE), pte); + pte++; + } + } + add_mm_counter(mm, rss, -((end - start) >> PAGE_SHIFT)); + flush_tlb_range(vma, start, end); +} + +int hugetlb_prefault(struct address_space *mapping, struct vm_area_struct *vma) +{ + struct mm_struct *mm = current->mm; + unsigned long addr; + int ret = 0; + + BUG_ON(vma->vm_start & ~HPAGE_MASK); + BUG_ON(vma->vm_end & ~HPAGE_MASK); + + spin_lock(&mm->page_table_lock); + for (addr = vma->vm_start; addr < vma->vm_end; addr += HPAGE_SIZE) { + unsigned long idx; + pte_t *pte = huge_pte_alloc(mm, addr); + struct page *page; + + if (!pte) { + ret = -ENOMEM; + goto out; + } + if (!pte_none(*pte)) + continue; + + idx = ((addr - vma->vm_start) >> HPAGE_SHIFT) + + (vma->vm_pgoff >> (HPAGE_SHIFT - PAGE_SHIFT)); + page = find_get_page(mapping, idx); + if (!page) { + /* charge the fs quota first */ + if (hugetlb_get_quota(mapping)) { + ret = -ENOMEM; + goto out; + } + page = alloc_huge_page(); + if (!page) { + hugetlb_put_quota(mapping); + ret = -ENOMEM; + goto out; + } + ret = add_to_page_cache(page, mapping, idx, GFP_ATOMIC); + if (! ret) { + unlock_page(page); + } else { + hugetlb_put_quota(mapping); + free_huge_page(page); + goto out; + } + } + set_huge_pte(mm, vma, page, pte, vma->vm_flags & VM_WRITE); + } +out: + spin_unlock(&mm->page_table_lock); + return ret; +} diff --git a/arch/sh64/mm/init.c b/arch/sh64/mm/init.c new file mode 100644 index 0000000..a65e8bb --- /dev/null +++ b/arch/sh64/mm/init.c @@ -0,0 +1,196 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mm/init.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003, 2004 Paul Mundt + * + */ + +#include <linux/init.h> +#include <linux/rwsem.h> +#include <linux/mm.h> +#include <linux/swap.h> +#include <linux/bootmem.h> + +#include <asm/mmu_context.h> +#include <asm/page.h> +#include <asm/pgalloc.h> +#include <asm/pgtable.h> +#include <asm/tlb.h> + +#ifdef CONFIG_BLK_DEV_INITRD +#include <linux/blk.h> +#endif + +DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); + +/* + * Cache of MMU context last used. + */ +unsigned long mmu_context_cache; +pgd_t * mmu_pdtp_cache; +int after_bootmem = 0; + +/* + * BAD_PAGE is the page that is used for page faults when linux + * is out-of-memory. Older versions of linux just did a + * do_exit(), but using this instead means there is less risk + * for a process dying in kernel mode, possibly leaving an inode + * unused etc.. + * + * BAD_PAGETABLE is the accompanying page-table: it is initialized + * to point to BAD_PAGE entries. + * + * ZERO_PAGE is a special page that is used for zero-initialized + * data and COW. + */ + +extern unsigned char empty_zero_page[PAGE_SIZE]; +extern unsigned char empty_bad_page[PAGE_SIZE]; +extern pte_t empty_bad_pte_table[PTRS_PER_PTE]; +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; + +extern char _text, _etext, _edata, __bss_start, _end; +extern char __init_begin, __init_end; + +/* It'd be good if these lines were in the standard header file. */ +#define START_PFN (NODE_DATA(0)->bdata->node_boot_start >> PAGE_SHIFT) +#define MAX_LOW_PFN (NODE_DATA(0)->bdata->node_low_pfn) + + +void show_mem(void) +{ + int i, total = 0, reserved = 0; + int shared = 0, cached = 0; + + printk("Mem-info:\n"); + show_free_areas(); + printk("Free swap: %6ldkB\n",nr_swap_pages<<(PAGE_SHIFT-10)); + i = max_mapnr; + while (i-- > 0) { + total++; + if (PageReserved(mem_map+i)) + reserved++; + else if (PageSwapCache(mem_map+i)) + cached++; + else if (page_count(mem_map+i)) + shared += page_count(mem_map+i) - 1; + } + printk("%d pages of RAM\n",total); + printk("%d reserved pages\n",reserved); + printk("%d pages shared\n",shared); + printk("%d pages swap cached\n",cached); + printk("%ld pages in page table cache\n",pgtable_cache_size); +} + +/* + * paging_init() sets up the page tables. + * + * head.S already did a lot to set up address translation for the kernel. + * Here we comes with: + * . MMU enabled + * . ASID set (SR) + * . some 512MB regions being mapped of which the most relevant here is: + * . CACHED segment (ASID 0 [irrelevant], shared AND NOT user) + * . possible variable length regions being mapped as: + * . UNCACHED segment (ASID 0 [irrelevant], shared AND NOT user) + * . All of the memory regions are placed, independently from the platform + * on high addresses, above 0x80000000. + * . swapper_pg_dir is already cleared out by the .space directive + * in any case swapper does not require a real page directory since + * it's all kernel contained. + * + * Those pesky NULL-reference errors in the kernel are then + * dealt with by not mapping address 0x00000000 at all. + * + */ +void __init paging_init(void) +{ + unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0}; + + pgd_init((unsigned long)swapper_pg_dir); + pgd_init((unsigned long)swapper_pg_dir + + sizeof(pgd_t) * USER_PTRS_PER_PGD); + + mmu_context_cache = MMU_CONTEXT_FIRST_VERSION; + + /* + * All memory is good as ZONE_NORMAL (fall-through) and ZONE_DMA. + */ + zones_size[ZONE_DMA] = MAX_LOW_PFN - START_PFN; + NODE_DATA(0)->node_mem_map = NULL; + free_area_init_node(0, NODE_DATA(0), zones_size, __MEMORY_START >> PAGE_SHIFT, 0); +} + +void __init mem_init(void) +{ + int codesize, reservedpages, datasize, initsize; + int tmp; + + max_mapnr = num_physpages = MAX_LOW_PFN - START_PFN; + high_memory = (void *)__va(MAX_LOW_PFN * PAGE_SIZE); + + /* + * Clear the zero-page. + * This is not required but we might want to re-use + * this very page to pass boot parameters, one day. + */ + memset(empty_zero_page, 0, PAGE_SIZE); + + /* this will put all low memory onto the freelists */ + totalram_pages += free_all_bootmem_node(NODE_DATA(0)); + reservedpages = 0; + for (tmp = 0; tmp < num_physpages; tmp++) + /* + * Only count reserved RAM pages + */ + if (PageReserved(mem_map+tmp)) + reservedpages++; + + after_bootmem = 1; + + codesize = (unsigned long) &_etext - (unsigned long) &_text; + datasize = (unsigned long) &_edata - (unsigned long) &_etext; + initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; + + printk("Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init)\n", + (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), + max_mapnr << (PAGE_SHIFT-10), + codesize >> 10, + reservedpages << (PAGE_SHIFT-10), + datasize >> 10, + initsize >> 10); +} + +void free_initmem(void) +{ + unsigned long addr; + + addr = (unsigned long)(&__init_begin); + for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { + ClearPageReserved(virt_to_page(addr)); + set_page_count(virt_to_page(addr), 1); + free_page(addr); + totalram_pages++; + } + printk ("Freeing unused kernel memory: %ldk freed\n", (&__init_end - &__init_begin) >> 10); +} + +#ifdef CONFIG_BLK_DEV_INITRD +void free_initrd_mem(unsigned long start, unsigned long end) +{ + unsigned long p; + for (p = start; p < end; p += PAGE_SIZE) { + ClearPageReserved(virt_to_page(p)); + set_page_count(virt_to_page(p), 1); + free_page(p); + totalram_pages++; + } + printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); +} +#endif + diff --git a/arch/sh64/mm/ioremap.c b/arch/sh64/mm/ioremap.c new file mode 100644 index 0000000..f4003da --- /dev/null +++ b/arch/sh64/mm/ioremap.c @@ -0,0 +1,469 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mm/ioremap.c + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003, 2004 Paul Mundt + * + * Mostly derived from arch/sh/mm/ioremap.c which, in turn is mostly + * derived from arch/i386/mm/ioremap.c . + * + * (C) Copyright 1995 1996 Linus Torvalds + */ +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/sched.h> +#include <linux/string.h> +#include <asm/io.h> +#include <asm/pgalloc.h> +#include <asm/tlbflush.h> +#include <linux/ioport.h> +#include <linux/bootmem.h> +#include <linux/proc_fs.h> + +static void shmedia_mapioaddr(unsigned long, unsigned long); +static unsigned long shmedia_ioremap(struct resource *, u32, int); + +static inline void remap_area_pte(pte_t * pte, unsigned long address, unsigned long size, + unsigned long phys_addr, unsigned long flags) +{ + unsigned long end; + unsigned long pfn; + pgprot_t pgprot = __pgprot(_PAGE_PRESENT | _PAGE_READ | + _PAGE_WRITE | _PAGE_DIRTY | + _PAGE_ACCESSED | _PAGE_SHARED | flags); + + address &= ~PMD_MASK; + end = address + size; + if (end > PMD_SIZE) + end = PMD_SIZE; + if (address >= end) + BUG(); + + pfn = phys_addr >> PAGE_SHIFT; + + pr_debug(" %s: pte %p address %lx size %lx phys_addr %lx\n", + __FUNCTION__,pte,address,size,phys_addr); + + do { + if (!pte_none(*pte)) { + printk("remap_area_pte: page already exists\n"); + BUG(); + } + + set_pte(pte, pfn_pte(pfn, pgprot)); + address += PAGE_SIZE; + pfn++; + pte++; + } while (address && (address < end)); +} + +static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size, + unsigned long phys_addr, unsigned long flags) +{ + unsigned long end; + + address &= ~PGDIR_MASK; + end = address + size; + + if (end > PGDIR_SIZE) + end = PGDIR_SIZE; + + phys_addr -= address; + + if (address >= end) + BUG(); + + do { + pte_t * pte = pte_alloc_kernel(&init_mm, pmd, address); + if (!pte) + return -ENOMEM; + remap_area_pte(pte, address, end - address, address + phys_addr, flags); + address = (address + PMD_SIZE) & PMD_MASK; + pmd++; + } while (address && (address < end)); + return 0; +} + +static int remap_area_pages(unsigned long address, unsigned long phys_addr, + unsigned long size, unsigned long flags) +{ + int error; + pgd_t * dir; + unsigned long end = address + size; + + phys_addr -= address; + dir = pgd_offset_k(address); + flush_cache_all(); + if (address >= end) + BUG(); + spin_lock(&init_mm.page_table_lock); + do { + pmd_t *pmd = pmd_alloc(&init_mm, dir, address); + error = -ENOMEM; + if (!pmd) + break; + if (remap_area_pmd(pmd, address, end - address, + phys_addr + address, flags)) { + break; + } + error = 0; + address = (address + PGDIR_SIZE) & PGDIR_MASK; + dir++; + } while (address && (address < end)); + spin_unlock(&init_mm.page_table_lock); + flush_tlb_all(); + return 0; +} + +/* + * Generic mapping function (not visible outside): + */ + +/* + * Remap an arbitrary physical address space into the kernel virtual + * address space. Needed when the kernel wants to access high addresses + * directly. + * + * NOTE! We need to allow non-page-aligned mappings too: we will obviously + * have to convert them into an offset in a page-aligned mapping, but the + * caller shouldn't need to know that small detail. + */ +void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags) +{ + void * addr; + struct vm_struct * area; + unsigned long offset, last_addr; + + /* Don't allow wraparound or zero size */ + last_addr = phys_addr + size - 1; + if (!size || last_addr < phys_addr) + return NULL; + + /* + * Mappings have to be page-aligned + */ + offset = phys_addr & ~PAGE_MASK; + phys_addr &= PAGE_MASK; + size = PAGE_ALIGN(last_addr + 1) - phys_addr; + + /* + * Ok, go for it.. + */ + area = get_vm_area(size, VM_IOREMAP); + pr_debug("Get vm_area returns %p addr %p\n",area,area->addr); + if (!area) + return NULL; + area->phys_addr = phys_addr; + addr = area->addr; + if (remap_area_pages((unsigned long)addr, phys_addr, size, flags)) { + vunmap(addr); + return NULL; + } + return (void *) (offset + (char *)addr); +} + +void iounmap(void *addr) +{ + struct vm_struct *area; + + vfree((void *) (PAGE_MASK & (unsigned long) addr)); + area = remove_vm_area((void *) (PAGE_MASK & (unsigned long) addr)); + if (!area) { + printk(KERN_ERR "iounmap: bad address %p\n", addr); + return; + } + + kfree(area); +} + +static struct resource shmedia_iomap = { + .name = "shmedia_iomap", + .start = IOBASE_VADDR + PAGE_SIZE, + .end = IOBASE_END - 1, +}; + +static void shmedia_mapioaddr(unsigned long pa, unsigned long va); +static void shmedia_unmapioaddr(unsigned long vaddr); +static unsigned long shmedia_ioremap(struct resource *res, u32 pa, int sz); + +/* + * We have the same problem as the SPARC, so lets have the same comment: + * Our mini-allocator... + * Boy this is gross! We need it because we must map I/O for + * timers and interrupt controller before the kmalloc is available. + */ + +#define XNMLN 15 +#define XNRES 10 + +struct xresource { + struct resource xres; /* Must be first */ + int xflag; /* 1 == used */ + char xname[XNMLN+1]; +}; + +static struct xresource xresv[XNRES]; + +static struct xresource *xres_alloc(void) +{ + struct xresource *xrp; + int n; + + xrp = xresv; + for (n = 0; n < XNRES; n++) { + if (xrp->xflag == 0) { + xrp->xflag = 1; + return xrp; + } + xrp++; + } + return NULL; +} + +static void xres_free(struct xresource *xrp) +{ + xrp->xflag = 0; +} + +static struct resource *shmedia_find_resource(struct resource *root, + unsigned long vaddr) +{ + struct resource *res; + + for (res = root->child; res; res = res->sibling) + if (res->start <= vaddr && res->end >= vaddr) + return res; + + return NULL; +} + +static unsigned long shmedia_alloc_io(unsigned long phys, unsigned long size, + const char *name) +{ + static int printed_full = 0; + struct xresource *xres; + struct resource *res; + char *tack; + int tlen; + + if (name == NULL) name = "???"; + + if ((xres = xres_alloc()) != 0) { + tack = xres->xname; + res = &xres->xres; + } else { + if (!printed_full) { + printk("%s: done with statics, switching to kmalloc\n", + __FUNCTION__); + printed_full = 1; + } + tlen = strlen(name); + tack = kmalloc(sizeof (struct resource) + tlen + 1, GFP_KERNEL); + if (!tack) + return -ENOMEM; + memset(tack, 0, sizeof(struct resource)); + res = (struct resource *) tack; + tack += sizeof (struct resource); + } + + strncpy(tack, name, XNMLN); + tack[XNMLN] = 0; + res->name = tack; + + return shmedia_ioremap(res, phys, size); +} + +static unsigned long shmedia_ioremap(struct resource *res, u32 pa, int sz) +{ + unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK); + unsigned long round_sz = (offset + sz + PAGE_SIZE-1) & PAGE_MASK; + unsigned long va; + unsigned int psz; + + if (allocate_resource(&shmedia_iomap, res, round_sz, + shmedia_iomap.start, shmedia_iomap.end, + PAGE_SIZE, NULL, NULL) != 0) { + panic("alloc_io_res(%s): cannot occupy\n", + (res->name != NULL)? res->name: "???"); + } + + va = res->start; + pa &= PAGE_MASK; + + psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE; + + /* log at boot time ... */ + printk("mapioaddr: %6s [%2d page%s] va 0x%08lx pa 0x%08x\n", + ((res->name != NULL) ? res->name : "???"), + psz, psz == 1 ? " " : "s", va, pa); + + for (psz = res->end - res->start + 1; psz != 0; psz -= PAGE_SIZE) { + shmedia_mapioaddr(pa, va); + va += PAGE_SIZE; + pa += PAGE_SIZE; + } + + res->start += offset; + res->end = res->start + sz - 1; /* not strictly necessary.. */ + + return res->start; +} + +static void shmedia_free_io(struct resource *res) +{ + unsigned long len = res->end - res->start + 1; + + BUG_ON((len & (PAGE_SIZE - 1)) != 0); + + while (len) { + len -= PAGE_SIZE; + shmedia_unmapioaddr(res->start + len); + } + + release_resource(res); +} + +static void *sh64_get_page(void) +{ + extern int after_bootmem; + void *page; + + if (after_bootmem) { + page = (void *)get_zeroed_page(GFP_ATOMIC); + } else { + page = alloc_bootmem_pages(PAGE_SIZE); + } + + if (!page || ((unsigned long)page & ~PAGE_MASK)) + panic("sh64_get_page: Out of memory already?\n"); + + return page; +} + +static void shmedia_mapioaddr(unsigned long pa, unsigned long va) +{ + pgd_t *pgdp; + pmd_t *pmdp; + pte_t *ptep, pte; + pgprot_t prot; + unsigned long flags = 1; /* 1 = CB0-1 device */ + + pr_debug("shmedia_mapiopage pa %08lx va %08lx\n", pa, va); + + pgdp = pgd_offset_k(va); + if (pgd_none(*pgdp) || !pgd_present(*pgdp)) { + pmdp = (pmd_t *)sh64_get_page(); + set_pgd(pgdp, __pgd((unsigned long)pmdp | _KERNPG_TABLE)); + } + + pmdp = pmd_offset(pgdp, va); + if (pmd_none(*pmdp) || !pmd_present(*pmdp) ) { + ptep = (pte_t *)sh64_get_page(); + set_pmd(pmdp, __pmd((unsigned long)ptep + _PAGE_TABLE)); + } + + prot = __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | + _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_SHARED | flags); + + pte = pfn_pte(pa >> PAGE_SHIFT, prot); + ptep = pte_offset_kernel(pmdp, va); + + if (!pte_none(*ptep) && + pte_val(*ptep) != pte_val(pte)) + pte_ERROR(*ptep); + + set_pte(ptep, pte); + + flush_tlb_kernel_range(va, PAGE_SIZE); +} + +static void shmedia_unmapioaddr(unsigned long vaddr) +{ + pgd_t *pgdp; + pmd_t *pmdp; + pte_t *ptep; + + pgdp = pgd_offset_k(vaddr); + pmdp = pmd_offset(pgdp, vaddr); + + if (pmd_none(*pmdp) || pmd_bad(*pmdp)) + return; + + ptep = pte_offset_kernel(pmdp, vaddr); + + if (pte_none(*ptep) || !pte_present(*ptep)) + return; + + clear_page((void *)ptep); + pte_clear(&init_mm, vaddr, ptep); +} + +unsigned long onchip_remap(unsigned long phys, unsigned long size, const char *name) +{ + if (size < PAGE_SIZE) + size = PAGE_SIZE; + + return shmedia_alloc_io(phys, size, name); +} + +void onchip_unmap(unsigned long vaddr) +{ + struct resource *res; + unsigned int psz; + + res = shmedia_find_resource(&shmedia_iomap, vaddr); + if (!res) { + printk(KERN_ERR "%s: Failed to free 0x%08lx\n", + __FUNCTION__, vaddr); + return; + } + + psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE; + + printk(KERN_DEBUG "unmapioaddr: %6s [%2d page%s] freed\n", + res->name, psz, psz == 1 ? " " : "s"); + + shmedia_free_io(res); + + if ((char *)res >= (char *)xresv && + (char *)res < (char *)&xresv[XNRES]) { + xres_free((struct xresource *)res); + } else { + kfree(res); + } +} + +#ifdef CONFIG_PROC_FS +static int +ioremap_proc_info(char *buf, char **start, off_t fpos, int length, int *eof, + void *data) +{ + char *p = buf, *e = buf + length; + struct resource *r; + const char *nm; + + for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) { + if (p + 32 >= e) /* Better than nothing */ + break; + if ((nm = r->name) == 0) nm = "???"; + p += sprintf(p, "%08lx-%08lx: %s\n", r->start, r->end, nm); + } + + return p-buf; +} +#endif /* CONFIG_PROC_FS */ + +static int __init register_proc_onchip(void) +{ +#ifdef CONFIG_PROC_FS + create_proc_read_entry("io_map",0,0, ioremap_proc_info, &shmedia_iomap); +#endif + return 0; +} + +__initcall(register_proc_onchip); diff --git a/arch/sh64/mm/tlb.c b/arch/sh64/mm/tlb.c new file mode 100644 index 0000000..d517e7d --- /dev/null +++ b/arch/sh64/mm/tlb.c @@ -0,0 +1,166 @@ +/* + * arch/sh64/mm/tlb.c + * + * Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org> + * Copyright (C) 2003 Richard Curnow <richard.curnow@superh.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + */ +#include <linux/mm.h> +#include <linux/init.h> +#include <asm/page.h> +#include <asm/tlb.h> +#include <asm/mmu_context.h> + +/** + * sh64_tlb_init + * + * Perform initial setup for the DTLB and ITLB. + */ +int __init sh64_tlb_init(void) +{ + /* Assign some sane DTLB defaults */ + cpu_data->dtlb.entries = 64; + cpu_data->dtlb.step = 0x10; + + cpu_data->dtlb.first = DTLB_FIXED | cpu_data->dtlb.step; + cpu_data->dtlb.next = cpu_data->dtlb.first; + + cpu_data->dtlb.last = DTLB_FIXED | + ((cpu_data->dtlb.entries - 1) * + cpu_data->dtlb.step); + + /* And again for the ITLB */ + cpu_data->itlb.entries = 64; + cpu_data->itlb.step = 0x10; + + cpu_data->itlb.first = ITLB_FIXED | cpu_data->itlb.step; + cpu_data->itlb.next = cpu_data->itlb.first; + cpu_data->itlb.last = ITLB_FIXED | + ((cpu_data->itlb.entries - 1) * + cpu_data->itlb.step); + + return 0; +} + +/** + * sh64_next_free_dtlb_entry + * + * Find the next available DTLB entry + */ +unsigned long long sh64_next_free_dtlb_entry(void) +{ + return cpu_data->dtlb.next; +} + +/** + * sh64_get_wired_dtlb_entry + * + * Allocate a wired (locked-in) entry in the DTLB + */ +unsigned long long sh64_get_wired_dtlb_entry(void) +{ + unsigned long long entry = sh64_next_free_dtlb_entry(); + + cpu_data->dtlb.first += cpu_data->dtlb.step; + cpu_data->dtlb.next += cpu_data->dtlb.step; + + return entry; +} + +/** + * sh64_put_wired_dtlb_entry + * + * @entry: Address of TLB slot. + * + * Free a wired (locked-in) entry in the DTLB. + * + * Works like a stack, last one to allocate must be first one to free. + */ +int sh64_put_wired_dtlb_entry(unsigned long long entry) +{ + __flush_tlb_slot(entry); + + /* + * We don't do any particularly useful tracking of wired entries, + * so this approach works like a stack .. last one to be allocated + * has to be the first one to be freed. + * + * We could potentially load wired entries into a list and work on + * rebalancing the list periodically (which also entails moving the + * contents of a TLB entry) .. though I have a feeling that this is + * more trouble than it's worth. + */ + + /* + * Entry must be valid .. we don't want any ITLB addresses! + */ + if (entry <= DTLB_FIXED) + return -EINVAL; + + /* + * Next, check if we're within range to be freed. (ie, must be the + * entry beneath the first 'free' entry! + */ + if (entry < (cpu_data->dtlb.first - cpu_data->dtlb.step)) + return -EINVAL; + + /* If we are, then bring this entry back into the list */ + cpu_data->dtlb.first -= cpu_data->dtlb.step; + cpu_data->dtlb.next = entry; + + return 0; +} + +/** + * sh64_setup_tlb_slot + * + * @config_addr: Address of TLB slot. + * @eaddr: Virtual address. + * @asid: Address Space Identifier. + * @paddr: Physical address. + * + * Load up a virtual<->physical translation for @eaddr<->@paddr in the + * pre-allocated TLB slot @config_addr (see sh64_get_wired_dtlb_entry). + */ +inline void sh64_setup_tlb_slot(unsigned long long config_addr, + unsigned long eaddr, + unsigned long asid, + unsigned long paddr) +{ + unsigned long long pteh, ptel; + + /* Sign extension */ +#if (NEFF == 32) + pteh = (unsigned long long)(signed long long)(signed long) eaddr; +#else +#error "Can't sign extend more than 32 bits yet" +#endif + pteh &= PAGE_MASK; + pteh |= (asid << PTEH_ASID_SHIFT) | PTEH_VALID; +#if (NEFF == 32) + ptel = (unsigned long long)(signed long long)(signed long) paddr; +#else +#error "Can't sign extend more than 32 bits yet" +#endif + ptel &= PAGE_MASK; + ptel |= (_PAGE_CACHABLE | _PAGE_READ | _PAGE_WRITE); + + asm volatile("putcfg %0, 1, %1\n\t" + "putcfg %0, 0, %2\n" + : : "r" (config_addr), "r" (ptel), "r" (pteh)); +} + +/** + * sh64_teardown_tlb_slot + * + * @config_addr: Address of TLB slot. + * + * Teardown any existing mapping in the TLB slot @config_addr. + */ +inline void sh64_teardown_tlb_slot(unsigned long long config_addr) + __attribute__ ((alias("__flush_tlb_slot"))); + diff --git a/arch/sh64/mm/tlbmiss.c b/arch/sh64/mm/tlbmiss.c new file mode 100644 index 0000000..c861595 --- /dev/null +++ b/arch/sh64/mm/tlbmiss.c @@ -0,0 +1,280 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * arch/sh64/mm/tlbmiss.c + * + * Original code from fault.c + * Copyright (C) 2000, 2001 Paolo Alberelli + * + * Fast PTE->TLB refill path + * Copyright (C) 2003 Richard.Curnow@superh.com + * + * IMPORTANT NOTES : + * The do_fast_page_fault function is called from a context in entry.S where very few registers + * have been saved. In particular, the code in this file must be compiled not to use ANY + * caller-save regiseters that are not part of the restricted save set. Also, it means that + * code in this file must not make calls to functions elsewhere in the kernel, or else the + * excepting context will see corruption in its caller-save registers. Plus, the entry.S save + * area is non-reentrant, so this code has to run with SR.BL==1, i.e. no interrupts taken inside + * it and panic on any exception. + * + */ + +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/ptrace.h> +#include <linux/mman.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/interrupt.h> + +#include <asm/system.h> +#include <asm/tlb.h> +#include <asm/io.h> +#include <asm/uaccess.h> +#include <asm/pgalloc.h> +#include <asm/mmu_context.h> +#include <asm/registers.h> /* required by inline asm statements */ + +/* Callable from fault.c, so not static */ +inline void __do_tlb_refill(unsigned long address, + unsigned long long is_text_not_data, pte_t *pte) +{ + unsigned long long ptel; + unsigned long long pteh=0; + struct tlb_info *tlbp; + unsigned long long next; + + /* Get PTEL first */ + ptel = pte_val(*pte); + + /* + * Set PTEH register + */ + pteh = address & MMU_VPN_MASK; + + /* Sign extend based on neff. */ +#if (NEFF == 32) + /* Faster sign extension */ + pteh = (unsigned long long)(signed long long)(signed long)pteh; +#else + /* General case */ + pteh = (pteh & NEFF_SIGN) ? (pteh | NEFF_MASK) : pteh; +#endif + + /* Set the ASID. */ + pteh |= get_asid() << PTEH_ASID_SHIFT; + pteh |= PTEH_VALID; + + /* Set PTEL register, set_pte has performed the sign extension */ + ptel &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */ + + tlbp = is_text_not_data ? &(cpu_data->itlb) : &(cpu_data->dtlb); + next = tlbp->next; + __flush_tlb_slot(next); + asm volatile ("putcfg %0,1,%2\n\n\t" + "putcfg %0,0,%1\n" + : : "r" (next), "r" (pteh), "r" (ptel) ); + + next += TLB_STEP; + if (next > tlbp->last) next = tlbp->first; + tlbp->next = next; + +} + +static int handle_vmalloc_fault(struct mm_struct *mm, unsigned long protection_flags, + unsigned long long textaccess, + unsigned long address) +{ + pgd_t *dir; + pmd_t *pmd; + static pte_t *pte; + pte_t entry; + + dir = pgd_offset_k(address); + pmd = pmd_offset(dir, address); + + if (pmd_none(*pmd)) { + return 0; + } + + if (pmd_bad(*pmd)) { + pmd_clear(pmd); + return 0; + } + + pte = pte_offset_kernel(pmd, address); + entry = *pte; + + if (pte_none(entry) || !pte_present(entry)) { + return 0; + } + + if ((pte_val(entry) & protection_flags) != protection_flags) { + return 0; + } + + __do_tlb_refill(address, textaccess, pte); + + return 1; +} + +static int handle_tlbmiss(struct mm_struct *mm, unsigned long long protection_flags, + unsigned long long textaccess, + unsigned long address) +{ + pgd_t *dir; + pmd_t *pmd; + pte_t *pte; + pte_t entry; + + /* NB. The PGD currently only contains a single entry - there is no + page table tree stored for the top half of the address space since + virtual pages in that region should never be mapped in user mode. + (In kernel mode, the only things in that region are the 512Mb super + page (locked in), and vmalloc (modules) + I/O device pages (handled + by handle_vmalloc_fault), so no PGD for the upper half is required + by kernel mode either). + + See how mm->pgd is allocated and initialised in pgd_alloc to see why + the next test is necessary. - RPC */ + if (address >= (unsigned long) TASK_SIZE) { + /* upper half - never has page table entries. */ + return 0; + } + dir = pgd_offset(mm, address); + if (pgd_none(*dir)) { + return 0; + } + if (!pgd_present(*dir)) { + return 0; + } + + pmd = pmd_offset(dir, address); + if (pmd_none(*pmd)) { + return 0; + } + if (!pmd_present(*pmd)) { + return 0; + } + pte = pte_offset_kernel(pmd, address); + entry = *pte; + if (pte_none(entry)) { + return 0; + } + if (!pte_present(entry)) { + return 0; + } + + /* If the page doesn't have sufficient protection bits set to service the + kind of fault being handled, there's not much point doing the TLB refill. + Punt the fault to the general handler. */ + if ((pte_val(entry) & protection_flags) != protection_flags) { + return 0; + } + + __do_tlb_refill(address, textaccess, pte); + + return 1; +} + +/* Put all this information into one structure so that everything is just arithmetic + relative to a single base address. This reduces the number of movi/shori pairs needed + just to load addresses of static data. */ +struct expevt_lookup { + unsigned short protection_flags[8]; + unsigned char is_text_access[8]; + unsigned char is_write_access[8]; +}; + +#define PRU (1<<9) +#define PRW (1<<8) +#define PRX (1<<7) +#define PRR (1<<6) + +#define DIRTY (_PAGE_DIRTY | _PAGE_ACCESSED) +#define YOUNG (_PAGE_ACCESSED) + +/* Sized as 8 rather than 4 to allow checking the PTE's PRU bit against whether + the fault happened in user mode or privileged mode. */ +static struct expevt_lookup expevt_lookup_table = { + .protection_flags = {PRX, PRX, 0, 0, PRR, PRR, PRW, PRW}, + .is_text_access = {1, 1, 0, 0, 0, 0, 0, 0} +}; + +/* + This routine handles page faults that can be serviced just by refilling a + TLB entry from an existing page table entry. (This case represents a very + large majority of page faults.) Return 1 if the fault was successfully + handled. Return 0 if the fault could not be handled. (This leads into the + general fault handling in fault.c which deals with mapping file-backed + pages, stack growth, segmentation faults, swapping etc etc) + */ +asmlinkage int do_fast_page_fault(unsigned long long ssr_md, unsigned long long expevt, + unsigned long address) +{ + struct task_struct *tsk; + struct mm_struct *mm; + unsigned long long textaccess; + unsigned long long protection_flags; + unsigned long long index; + unsigned long long expevt4; + + /* The next few lines implement a way of hashing EXPEVT into a small array index + which can be used to lookup parameters specific to the type of TLBMISS being + handled. Note: + ITLBMISS has EXPEVT==0xa40 + RTLBMISS has EXPEVT==0x040 + WTLBMISS has EXPEVT==0x060 + */ + + expevt4 = (expevt >> 4); + /* TODO : xor ssr_md into this expression too. Then we can check that PRU is set + when it needs to be. */ + index = expevt4 ^ (expevt4 >> 5); + index &= 7; + protection_flags = expevt_lookup_table.protection_flags[index]; + textaccess = expevt_lookup_table.is_text_access[index]; + +#ifdef CONFIG_SH64_PROC_TLB + ++calls_to_do_fast_page_fault; +#endif + + /* SIM + * Note this is now called with interrupts still disabled + * This is to cope with being called for a missing IO port + * address with interupts disabled. This should be fixed as + * soon as we have a better 'fast path' miss handler. + * + * Plus take care how you try and debug this stuff. + * For example, writing debug data to a port which you + * have just faulted on is not going to work. + */ + + tsk = current; + mm = tsk->mm; + + if ((address >= VMALLOC_START && address < VMALLOC_END) || + (address >= IOBASE_VADDR && address < IOBASE_END)) { + if (ssr_md) { + /* Process-contexts can never have this address range mapped */ + if (handle_vmalloc_fault(mm, protection_flags, textaccess, address)) { + return 1; + } + } + } else if (!in_interrupt() && mm) { + if (handle_tlbmiss(mm, protection_flags, textaccess, address)) { + return 1; + } + } + + return 0; +} + diff --git a/arch/sh64/oprofile/Kconfig b/arch/sh64/oprofile/Kconfig new file mode 100644 index 0000000..19d3773 --- /dev/null +++ b/arch/sh64/oprofile/Kconfig @@ -0,0 +1,23 @@ + +menu "Profiling support" + depends on EXPERIMENTAL + +config PROFILING + bool "Profiling support (EXPERIMENTAL)" + help + Say Y here to enable the extended profiling support mechanisms used + by profilers such as OProfile. + + +config OPROFILE + tristate "OProfile system profiling (EXPERIMENTAL)" + depends on PROFILING + help + OProfile is a profiling system capable of profiling the + whole system, include the kernel, kernel modules, libraries, + and applications. + + If unsure, say N. + +endmenu + diff --git a/arch/sh64/oprofile/Makefile b/arch/sh64/oprofile/Makefile new file mode 100644 index 0000000..11a451f --- /dev/null +++ b/arch/sh64/oprofile/Makefile @@ -0,0 +1,12 @@ +obj-$(CONFIG_OPROFILE) += oprofile.o + +DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \ + oprof.o cpu_buffer.o buffer_sync.o \ + event_buffer.o oprofile_files.o \ + oprofilefs.o oprofile_stats.o \ + timer_int.o ) + +profdrvr-y := op_model_null.o + +oprofile-y := $(DRIVER_OBJS) $(profdrvr-y) + diff --git a/arch/sh64/oprofile/op_model_null.c b/arch/sh64/oprofile/op_model_null.c new file mode 100644 index 0000000..a845b08 --- /dev/null +++ b/arch/sh64/oprofile/op_model_null.c @@ -0,0 +1,23 @@ +/* + * arch/sh/oprofile/op_model_null.c + * + * Copyright (C) 2003 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/kernel.h> +#include <linux/oprofile.h> +#include <linux/init.h> +#include <linux/errno.h> + +int __init oprofile_arch_init(struct oprofile_operations *ops) +{ + return -ENODEV; +} + +void oprofile_arch_exit(void) +{ +} + |
