diff options
Diffstat (limited to 'arch/c6x')
114 files changed, 12579 insertions, 0 deletions
diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig new file mode 100644 index 0000000..26e67f0 --- /dev/null +++ b/arch/c6x/Kconfig @@ -0,0 +1,174 @@ +# +# For a description of the syntax of this configuration file, +# see Documentation/kbuild/kconfig-language.txt. +# + +config TMS320C6X + def_bool y + select CLKDEV_LOOKUP + select GENERIC_IRQ_SHOW + select HAVE_ARCH_TRACEHOOK + select HAVE_DMA_API_DEBUG + select HAVE_GENERIC_HARDIRQS + select HAVE_MEMBLOCK + select HAVE_SPARSE_IRQ + select OF + select OF_EARLY_FLATTREE + +config MMU + def_bool n + +config ZONE_DMA + def_bool y + +config FPU + def_bool n + +config HIGHMEM + def_bool n + +config NUMA + def_bool n + +config RWSEM_GENERIC_SPINLOCK + def_bool y + +config RWSEM_XCHGADD_ALGORITHM + def_bool n + +config GENERIC_CALIBRATE_DELAY + def_bool y + +config GENERIC_HWEIGHT + def_bool y + +config GENERIC_CLOCKEVENTS + def_bool y + +config GENERIC_CLOCKEVENTS_BROADCAST + bool + +config GENERIC_BUG + def_bool y + +config COMMON_CLKDEV + def_bool y + +config C6X_BIG_KERNEL + bool "Build a big kernel" + help + The C6X function call instruction has a limited range of +/- 2MiB. + This is sufficient for most kernels, but some kernel configurations + with lots of compiled-in functionality may require a larger range + for function calls. Use this option to have the compiler generate + function calls with 32-bit range. This will make the kernel both + larger and slower. + + If unsure, say N. + +source "init/Kconfig" + +# Use the generic interrupt handling code in kernel/irq/ + +source "kernel/Kconfig.freezer" + +config CMDLINE_BOOL + bool "Default bootloader kernel arguments" + +config CMDLINE + string "Kernel command line" + depends on CMDLINE_BOOL + default "console=ttyS0,57600" + help + On some architectures there is currently no way for the boot loader + to pass arguments to the kernel. For these architectures, you should + supply some command-line options at build time by entering them + here. + +config CMDLINE_FORCE + bool "Force default kernel command string" + depends on CMDLINE_BOOL + default n + help + Set this to have arguments from the default kernel command string + override those passed by the boot loader. + +config CPU_BIG_ENDIAN + bool "Build big-endian kernel" + default n + help + Say Y if you plan on running a kernel in big-endian mode. + Note that your board must be properly built and your board + port must properly enable any big-endian related features + of your chipset/board/processor. + +config FORCE_MAX_ZONEORDER + int "Maximum zone order" + default "13" + help + The kernel memory allocator divides physically contiguous memory + blocks into "zones", where each zone is a power of two number of + pages. This option selects the largest power of two that the kernel + keeps in the memory allocator. If you need to allocate very large + blocks of physically contiguous memory, then you may need to + increase this value. + + This config option is actually maximum order plus one. For example, + a value of 11 means that the largest free memory block is 2^10 pages. + +menu "Processor type and features" + +source "arch/c6x/platforms/Kconfig" + +config TMS320C6X_CACHES_ON + bool "L2 cache support" + default y + +config KERNEL_RAM_BASE_ADDRESS + hex "Virtual address of memory base" + default 0xe0000000 if SOC_TMS320C6455 + default 0xe0000000 if SOC_TMS320C6457 + default 0xe0000000 if SOC_TMS320C6472 + default 0x80000000 + +source "mm/Kconfig" + +source "kernel/Kconfig.preempt" + +source "kernel/Kconfig.hz" +source "kernel/time/Kconfig" + +endmenu + +menu "Executable file formats" + +source "fs/Kconfig.binfmt" + +endmenu + +source "net/Kconfig" + +source "drivers/Kconfig" + +source "fs/Kconfig" + +source "security/Kconfig" + +source "crypto/Kconfig" + +source "lib/Kconfig" + +menu "Kernel hacking" + +source "lib/Kconfig.debug" + +config ACCESS_CHECK + bool "Check the user pointer address" + default y + help + Usually the pointer transfer from user space is checked to see if its + address is in the kernel space. + + Say N here to disable that check to improve the performance. + +endmenu diff --git a/arch/c6x/Makefile b/arch/c6x/Makefile new file mode 100644 index 0000000..1d08dd0 --- /dev/null +++ b/arch/c6x/Makefile @@ -0,0 +1,60 @@ +# +# linux/arch/c6x/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. +# + +cflags-y += -mno-dsbt -msdata=none + +cflags-$(CONFIG_C6X_BIG_KERNEL) += -mlong-calls + +CFLAGS_MODULE += -mlong-calls -mno-dsbt -msdata=none + +CHECKFLAGS += + +KBUILD_CFLAGS += $(cflags-y) +KBUILD_AFLAGS += $(cflags-y) + +ifdef CONFIG_CPU_BIG_ENDIAN +KBUILD_CFLAGS += -mbig-endian +KBUILD_AFLAGS += -mbig-endian +LINKFLAGS += -mbig-endian +KBUILD_LDFLAGS += -mbig-endian +LDFLAGS += -EB +endif + +head-y := arch/c6x/kernel/head.o +core-y += arch/c6x/kernel/ arch/c6x/mm/ arch/c6x/platforms/ +libs-y += arch/c6x/lib/ + +# Default to vmlinux.bin, override when needed +all: vmlinux.bin + +boot := arch/$(ARCH)/boot + +# Are we making a dtbImage.<boardname> target? If so, crack out the boardname +DTB:=$(subst dtbImage.,,$(filter dtbImage.%, $(MAKECMDGOALS))) +export DTB + +ifneq ($(DTB),) +core-y += $(boot)/ +endif + +# With make 3.82 we cannot mix normal and wildcard targets + +vmlinux.bin: vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) + +dtbImage.%: vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) + +archclean: + $(Q)$(MAKE) $(clean)=$(boot) + +define archhelp + @echo ' vmlinux.bin - Binary kernel image (arch/$(ARCH)/boot/vmlinux.bin)' + @echo ' dtbImage.<dt> - ELF image with $(arch)/boot/dts/<dt>.dts linked in' + @echo ' - stripped elf with fdt blob' +endef diff --git a/arch/c6x/boot/Makefile b/arch/c6x/boot/Makefile new file mode 100644 index 0000000..ecca820 --- /dev/null +++ b/arch/c6x/boot/Makefile @@ -0,0 +1,30 @@ +# +# Makefile for bootable kernel images +# + +OBJCOPYFLAGS_vmlinux.bin := -O binary +$(obj)/vmlinux.bin: vmlinux FORCE + $(call if_changed,objcopy) + +DTC_FLAGS ?= -p 1024 + +ifneq ($(DTB),) +obj-y += linked_dtb.o +endif + +$(obj)/%.dtb: $(src)/dts/%.dts FORCE + $(call cmd,dtc) + +quiet_cmd_cp = CP $< $@$2 + cmd_cp = cat $< >$@$2 || (rm -f $@ && echo false) + +# Generate builtin.dtb from $(DTB).dtb +$(obj)/builtin.dtb: $(obj)/$(DTB).dtb + $(call if_changed,cp) + +$(obj)/linked_dtb.o: $(obj)/builtin.dtb + +$(obj)/dtbImage.%: vmlinux + $(call if_changed,objcopy) + +clean-files := $(obj)/*.dtb diff --git a/arch/c6x/boot/dts/dsk6455.dts b/arch/c6x/boot/dts/dsk6455.dts new file mode 100644 index 0000000..2b71f80 --- /dev/null +++ b/arch/c6x/boot/dts/dsk6455.dts @@ -0,0 +1,62 @@ +/* + * arch/c6x/boot/dts/dsk6455.dts + * + * DSK6455 Evaluation Platform For TMS320C6455 + * Copyright (C) 2011 Texas Instruments Incorporated + * + * Author: Mark Salter <msalter@redhat.com> + * + * 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. + * + */ + +/dts-v1/; + +/include/ "tms320c6455.dtsi" + +/ { + model = "Spectrum Digital DSK6455"; + compatible = "spectrum-digital,dsk6455"; + + chosen { + bootargs = "root=/dev/nfs ip=dhcp rw"; + }; + + memory { + device_type = "memory"; + reg = <0xE0000000 0x08000000>; + }; + + soc { + megamod_pic: interrupt-controller@1800000 { + interrupts = < 12 13 14 15 >; + }; + + emifa@70000000 { + flash@3,0 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "cfi-flash"; + reg = <0x3 0x0 0x400000>; + bank-width = <1>; + device-width = <1>; + partition@0 { + reg = <0x0 0x400000>; + label = "NOR"; + }; + }; + }; + + timer1: timer@2980000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 69 >; + }; + + clock-controller@029a0000 { + clock-frequency = <50000000>; + }; + }; +}; diff --git a/arch/c6x/boot/dts/evmc6457.dts b/arch/c6x/boot/dts/evmc6457.dts new file mode 100644 index 0000000..0301eb9a --- /dev/null +++ b/arch/c6x/boot/dts/evmc6457.dts @@ -0,0 +1,48 @@ +/* + * arch/c6x/boot/dts/evmc6457.dts + * + * EVMC6457 Evaluation Platform For TMS320C6457 + * + * Copyright (C) 2011 Texas Instruments Incorporated + * + * Author: Mark Salter <msalter@redhat.com> + * + * 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. + * + */ + +/dts-v1/; + +/include/ "tms320c6457.dtsi" + +/ { + model = "eInfochips EVMC6457"; + compatible = "einfochips,evmc6457"; + + chosen { + bootargs = "console=hvc root=/dev/nfs ip=dhcp rw"; + }; + + memory { + device_type = "memory"; + reg = <0xE0000000 0x10000000>; + }; + + soc { + megamod_pic: interrupt-controller@1800000 { + interrupts = < 12 13 14 15 >; + }; + + timer0: timer@2940000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 67 >; + }; + + clock-controller@29a0000 { + clock-frequency = <60000000>; + }; + }; +}; diff --git a/arch/c6x/boot/dts/evmc6472.dts b/arch/c6x/boot/dts/evmc6472.dts new file mode 100644 index 0000000..3e207b4 --- /dev/null +++ b/arch/c6x/boot/dts/evmc6472.dts @@ -0,0 +1,73 @@ +/* + * arch/c6x/boot/dts/evmc6472.dts + * + * EVMC6472 Evaluation Platform For TMS320C6472 + * + * Copyright (C) 2011 Texas Instruments Incorporated + * + * Author: Mark Salter <msalter@redhat.com> + * + * 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. + * + */ + +/dts-v1/; + +/include/ "tms320c6472.dtsi" + +/ { + model = "eInfochips EVMC6472"; + compatible = "einfochips,evmc6472"; + + chosen { + bootargs = "console=hvc root=/dev/nfs ip=dhcp rw"; + }; + + memory { + device_type = "memory"; + reg = <0xE0000000 0x10000000>; + }; + + soc { + megamod_pic: interrupt-controller@1800000 { + interrupts = < 12 13 14 15 >; + }; + + timer0: timer@25e0000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 16 >; + }; + + timer1: timer@25f0000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 16 >; + }; + + timer2: timer@2600000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 16 >; + }; + + timer3: timer@2610000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 16 >; + }; + + timer4: timer@2620000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 16 >; + }; + + timer5: timer@2630000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 16 >; + }; + + clock-controller@29a0000 { + clock-frequency = <25000000>; + }; + }; +}; diff --git a/arch/c6x/boot/dts/evmc6474.dts b/arch/c6x/boot/dts/evmc6474.dts new file mode 100644 index 0000000..4dc2912 --- /dev/null +++ b/arch/c6x/boot/dts/evmc6474.dts @@ -0,0 +1,58 @@ +/* + * arch/c6x/boot/dts/evmc6474.dts + * + * EVMC6474 Evaluation Platform For TMS320C6474 + * + * Copyright (C) 2011 Texas Instruments Incorporated + * + * Author: Mark Salter <msalter@redhat.com> + * + * 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. + * + */ + +/dts-v1/; + +/include/ "tms320c6474.dtsi" + +/ { + model = "Spectrum Digital EVMC6474"; + compatible = "spectrum-digital,evmc6474"; + + chosen { + bootargs = "console=hvc root=/dev/nfs ip=dhcp rw"; + }; + + memory { + device_type = "memory"; + reg = <0x80000000 0x08000000>; + }; + + soc { + megamod_pic: interrupt-controller@1800000 { + interrupts = < 12 13 14 15 >; + }; + + timer3: timer@2940000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 39 >; + }; + + timer4: timer@2950000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 41 >; + }; + + timer5: timer@2960000 { + interrupt-parent = <&megamod_pic>; + interrupts = < 43 >; + }; + + clock-controller@29a0000 { + clock-frequency = <50000000>; + }; + }; +}; diff --git a/arch/c6x/boot/dts/tms320c6455.dtsi b/arch/c6x/boot/dts/tms320c6455.dtsi new file mode 100644 index 0000000..a804ec1 --- /dev/null +++ b/arch/c6x/boot/dts/tms320c6455.dtsi @@ -0,0 +1,96 @@ + +/ { + #address-cells = <1>; + #size-cells = <1>; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + device_type = "cpu"; + model = "ti,c64x+"; + reg = <0>; + }; + }; + + soc { + compatible = "simple-bus"; + model = "tms320c6455"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + core_pic: interrupt-controller { + interrupt-controller; + #interrupt-cells = <1>; + compatible = "ti,c64x+core-pic"; + }; + + /* + * Megamodule interrupt controller + */ + megamod_pic: interrupt-controller@1800000 { + compatible = "ti,c64x+megamod-pic"; + interrupt-controller; + #interrupt-cells = <1>; + reg = <0x1800000 0x1000>; + interrupt-parent = <&core_pic>; + }; + + cache-controller@1840000 { + compatible = "ti,c64x+cache"; + reg = <0x01840000 0x8400>; + }; + + emifa@70000000 { + compatible = "ti,c64x+emifa", "simple-bus"; + #address-cells = <2>; + #size-cells = <1>; + reg = <0x70000000 0x100>; + ranges = <0x2 0x0 0xa0000000 0x00000008 + 0x3 0x0 0xb0000000 0x00400000 + 0x4 0x0 0xc0000000 0x10000000 + 0x5 0x0 0xD0000000 0x10000000>; + + ti,dscr-dev-enable = <13>; + ti,emifa-burst-priority = <255>; + ti,emifa-ce-config = <0x00240120 + 0x00240120 + 0x00240122 + 0x00240122>; + }; + + timer1: timer@2980000 { + compatible = "ti,c64x+timer64"; + reg = <0x2980000 0x40>; + ti,dscr-dev-enable = <4>; + }; + + clock-controller@029a0000 { + compatible = "ti,c6455-pll", "ti,c64x+pll"; + reg = <0x029a0000 0x200>; + ti,c64x+pll-bypass-delay = <1440>; + ti,c64x+pll-reset-delay = <15360>; + ti,c64x+pll-lock-delay = <24000>; + }; + + device-state-config-regs@2a80000 { + compatible = "ti,c64x+dscr"; + reg = <0x02a80000 0x41000>; + + ti,dscr-devstat = <0>; + ti,dscr-silicon-rev = <8 28 0xf>; + ti,dscr-rmii-resets = <0 0x40020 0x00040000>; + + ti,dscr-locked-regs = <0x40008 0x40004 0x0f0a0b00>; + ti,dscr-devstate-ctl-regs = + <0 12 0x40008 1 0 0 2 + 12 1 0x40008 3 0 30 2 + 13 2 0x4002c 1 0xffffffff 0 1>; + ti,dscr-devstate-stat-regs = + <0 10 0x40014 1 0 0 3 + 10 2 0x40018 1 0 0 3>; + }; + }; +}; diff --git a/arch/c6x/boot/dts/tms320c6457.dtsi b/arch/c6x/boot/dts/tms320c6457.dtsi new file mode 100644 index 0000000..35f4070 --- /dev/null +++ b/arch/c6x/boot/dts/tms320c6457.dtsi @@ -0,0 +1,68 @@ + +/ { + #address-cells = <1>; + #size-cells = <1>; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + device_type = "cpu"; + model = "ti,c64x+"; + reg = <0>; + }; + }; + + soc { + compatible = "simple-bus"; + model = "tms320c6457"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + core_pic: interrupt-controller { + interrupt-controller; + #interrupt-cells = <1>; + compatible = "ti,c64x+core-pic"; + }; + + megamod_pic: interrupt-controller@1800000 { + compatible = "ti,c64x+megamod-pic"; + interrupt-controller; + #interrupt-cells = <1>; + interrupt-parent = <&core_pic>; + reg = <0x1800000 0x1000>; + }; + + cache-controller@1840000 { + compatible = "ti,c64x+cache"; + reg = <0x01840000 0x8400>; + }; + + device-state-controller@2880800 { + compatible = "ti,c64x+dscr"; + reg = <0x02880800 0x400>; + + ti,dscr-devstat = <0x20>; + ti,dscr-silicon-rev = <0x18 28 0xf>; + ti,dscr-mac-fuse-regs = <0x114 3 4 5 6 + 0x118 0 0 1 2>; + ti,dscr-kick-regs = <0x38 0x83E70B13 + 0x3c 0x95A4F1E0>; + }; + + timer0: timer@2940000 { + compatible = "ti,c64x+timer64"; + reg = <0x2940000 0x40>; + }; + + clock-controller@29a0000 { + compatible = "ti,c6457-pll", "ti,c64x+pll"; + reg = <0x029a0000 0x200>; + ti,c64x+pll-bypass-delay = <300>; + ti,c64x+pll-reset-delay = <24000>; + ti,c64x+pll-lock-delay = <50000>; + }; + }; +}; diff --git a/arch/c6x/boot/dts/tms320c6472.dtsi b/arch/c6x/boot/dts/tms320c6472.dtsi new file mode 100644 index 0000000..b488aae --- /dev/null +++ b/arch/c6x/boot/dts/tms320c6472.dtsi @@ -0,0 +1,134 @@ + +/ { + #address-cells = <1>; + #size-cells = <1>; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + device_type = "cpu"; + reg = <0>; + model = "ti,c64x+"; + }; + cpu@1 { + device_type = "cpu"; + reg = <1>; + model = "ti,c64x+"; + }; + cpu@2 { + device_type = "cpu"; + reg = <2>; + model = "ti,c64x+"; + }; + cpu@3 { + device_type = "cpu"; + reg = <3>; + model = "ti,c64x+"; + }; + cpu@4 { + device_type = "cpu"; + reg = <4>; + model = "ti,c64x+"; + }; + cpu@5 { + device_type = "cpu"; + reg = <5>; + model = "ti,c64x+"; + }; + }; + + soc { + compatible = "simple-bus"; + model = "tms320c6472"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + core_pic: interrupt-controller { + compatible = "ti,c64x+core-pic"; + interrupt-controller; + #interrupt-cells = <1>; + }; + + megamod_pic: interrupt-controller@1800000 { + compatible = "ti,c64x+megamod-pic"; + interrupt-controller; + #interrupt-cells = <1>; + reg = <0x1800000 0x1000>; + interrupt-parent = <&core_pic>; + }; + + cache-controller@1840000 { + compatible = "ti,c64x+cache"; + reg = <0x01840000 0x8400>; + }; + + timer0: timer@25e0000 { + compatible = "ti,c64x+timer64"; + ti,core-mask = < 0x01 >; + reg = <0x25e0000 0x40>; + }; + + timer1: timer@25f0000 { + compatible = "ti,c64x+timer64"; + ti,core-mask = < 0x02 >; + reg = <0x25f0000 0x40>; + }; + + timer2: timer@2600000 { + compatible = "ti,c64x+timer64"; + ti,core-mask = < 0x04 >; + reg = <0x2600000 0x40>; + }; + + timer3: timer@2610000 { + compatible = "ti,c64x+timer64"; + ti,core-mask = < 0x08 >; + reg = <0x2610000 0x40>; + }; + + timer4: timer@2620000 { + compatible = "ti,c64x+timer64"; + ti,core-mask = < 0x10 >; + reg = <0x2620000 0x40>; + }; + + timer5: timer@2630000 { + compatible = "ti,c64x+timer64"; + ti,core-mask = < 0x20 >; + reg = <0x2630000 0x40>; + }; + + clock-controller@29a0000 { + compatible = "ti,c6472-pll", "ti,c64x+pll"; + reg = <0x029a0000 0x200>; + ti,c64x+pll-bypass-delay = <200>; + ti,c64x+pll-reset-delay = <12000>; + ti,c64x+pll-lock-delay = <80000>; + }; + + device-state-controller@2a80000 { + compatible = "ti,c64x+dscr"; + reg = <0x02a80000 0x1000>; + + ti,dscr-devstat = <0>; + ti,dscr-silicon-rev = <0x70c 16 0xff>; + + ti,dscr-mac-fuse-regs = <0x700 1 2 3 4 + 0x704 5 6 0 0>; + + ti,dscr-rmii-resets = <0x208 1 + 0x20c 1>; + + ti,dscr-locked-regs = <0x200 0x204 0x0a1e183a + 0x40c 0x420 0xbea7 + 0x41c 0x420 0xbea7>; + + ti,dscr-privperm = <0x41c 0xaaaaaaaa>; + + ti,dscr-devstate-ctl-regs = <0 13 0x200 1 0 0 1>; + }; + }; +}; diff --git a/arch/c6x/boot/dts/tms320c6474.dtsi b/arch/c6x/boot/dts/tms320c6474.dtsi new file mode 100644 index 0000000..cc601bf --- /dev/null +++ b/arch/c6x/boot/dts/tms320c6474.dtsi @@ -0,0 +1,89 @@ + +/ { + #address-cells = <1>; + #size-cells = <1>; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + device_type = "cpu"; + reg = <0>; + model = "ti,c64x+"; + }; + cpu@1 { + device_type = "cpu"; + reg = <1>; + model = "ti,c64x+"; + }; + cpu@2 { + device_type = "cpu"; + reg = <2>; + model = "ti,c64x+"; + }; + }; + + soc { + compatible = "simple-bus"; + model = "tms320c6474"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + core_pic: interrupt-controller { + interrupt-controller; + #interrupt-cells = <1>; + compatible = "ti,c64x+core-pic"; + }; + + megamod_pic: interrupt-controller@1800000 { + compatible = "ti,c64x+megamod-pic"; + interrupt-controller; + #interrupt-cells = <1>; + reg = <0x1800000 0x1000>; + interrupt-parent = <&core_pic>; + }; + + cache-controller@1840000 { + compatible = "ti,c64x+cache"; + reg = <0x01840000 0x8400>; + }; + + timer3: timer@2940000 { + compatible = "ti,c64x+timer64"; + ti,core-mask = < 0x04 >; + reg = <0x2940000 0x40>; + }; + + timer4: timer@2950000 { + compatible = "ti,c64x+timer64"; + ti,core-mask = < 0x02 >; + reg = <0x2950000 0x40>; + }; + + timer5: timer@2960000 { + compatible = "ti,c64x+timer64"; + ti,core-mask = < 0x01 >; + reg = <0x2960000 0x40>; + }; + + device-state-controller@2880800 { + compatible = "ti,c64x+dscr"; + reg = <0x02880800 0x400>; + + ti,dscr-devstat = <0x004>; + ti,dscr-silicon-rev = <0x014 28 0xf>; + ti,dscr-mac-fuse-regs = <0x34 3 4 5 6 + 0x38 0 0 1 2>; + }; + + clock-controller@29a0000 { + compatible = "ti,c6474-pll", "ti,c64x+pll"; + reg = <0x029a0000 0x200>; + ti,c64x+pll-bypass-delay = <120>; + ti,c64x+pll-reset-delay = <30000>; + ti,c64x+pll-lock-delay = <60000>; + }; + }; +}; diff --git a/arch/c6x/boot/linked_dtb.S b/arch/c6x/boot/linked_dtb.S new file mode 100644 index 0000000..57a4454 --- /dev/null +++ b/arch/c6x/boot/linked_dtb.S @@ -0,0 +1,2 @@ +.section __fdt_blob,"a" +.incbin "arch/c6x/boot/builtin.dtb" diff --git a/arch/c6x/configs/dsk6455_defconfig b/arch/c6x/configs/dsk6455_defconfig new file mode 100644 index 0000000..4663487 --- /dev/null +++ b/arch/c6x/configs/dsk6455_defconfig @@ -0,0 +1,44 @@ +CONFIG_SOC_TMS320C6455=y +CONFIG_EXPERIMENTAL=y +# CONFIG_LOCALVERSION_AUTO is not set +CONFIG_SYSVIPC=y +CONFIG_SPARSE_IRQ=y +CONFIG_LOG_BUF_SHIFT=14 +CONFIG_NAMESPACES=y +# CONFIG_UTS_NS is not set +# CONFIG_USER_NS is not set +# CONFIG_PID_NS is not set +CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_SIZE=y +CONFIG_EXPERT=y +# CONFIG_FUTEX is not set +# CONFIG_SLUB_DEBUG is not set +CONFIG_MODULES=y +CONFIG_MODULE_FORCE_LOAD=y +CONFIG_MODULE_UNLOAD=y +CONFIG_MODULE_FORCE_UNLOAD=y +CONFIG_CMDLINE_BOOL=y +CONFIG_CMDLINE="" +CONFIG_NO_HZ=y +CONFIG_HIGH_RES_TIMERS=y +CONFIG_BLK_DEV_LOOP=y +CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_RAM_COUNT=2 +CONFIG_BLK_DEV_RAM_SIZE=17000 +CONFIG_MISC_DEVICES=y +# CONFIG_INPUT is not set +# CONFIG_SERIO is not set +# CONFIG_VT is not set +# CONFIG_HW_RANDOM is not set +# CONFIG_HWMON is not set +# CONFIG_USB_SUPPORT is not set +# CONFIG_IOMMU_SUPPORT is not set +# CONFIG_MISC_FILESYSTEMS is not set +CONFIG_CRC16=y +# CONFIG_ENABLE_MUST_CHECK is not set +# CONFIG_SCHED_DEBUG is not set +# CONFIG_DEBUG_BUGVERBOSE is not set +CONFIG_MTD=y +CONFIG_MTD_CFI=y +CONFIG_MTD_CFI_AMDSTD=y +CONFIG_MTD_PHYSMAP_OF=y diff --git a/arch/c6x/configs/evmc6457_defconfig b/arch/c6x/configs/evmc6457_defconfig new file mode 100644 index 0000000..bba40e1 --- /dev/null +++ b/arch/c6x/configs/evmc6457_defconfig @@ -0,0 +1,41 @@ +CONFIG_SOC_TMS320C6457=y +CONFIG_EXPERIMENTAL=y +# CONFIG_LOCALVERSION_AUTO is not set +CONFIG_SYSVIPC=y +CONFIG_SPARSE_IRQ=y +CONFIG_LOG_BUF_SHIFT=14 +CONFIG_NAMESPACES=y +# CONFIG_UTS_NS is not set +# CONFIG_USER_NS is not set +# CONFIG_PID_NS is not set +CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_SIZE=y +CONFIG_EXPERT=y +# CONFIG_FUTEX is not set +# CONFIG_SLUB_DEBUG is not set +CONFIG_MODULES=y +CONFIG_MODULE_FORCE_LOAD=y +CONFIG_MODULE_UNLOAD=y +CONFIG_MODULE_FORCE_UNLOAD=y +CONFIG_CMDLINE_BOOL=y +CONFIG_CMDLINE="" +CONFIG_BOARD_EVM6457=y +CONFIG_NO_HZ=y +CONFIG_HIGH_RES_TIMERS=y +CONFIG_BLK_DEV_LOOP=y +CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_RAM_COUNT=2 +CONFIG_BLK_DEV_RAM_SIZE=17000 +CONFIG_MISC_DEVICES=y +# CONFIG_INPUT is not set +# CONFIG_SERIO is not set +# CONFIG_VT is not set +# CONFIG_HW_RANDOM is not set +# CONFIG_HWMON is not set +# CONFIG_USB_SUPPORT is not set +# CONFIG_IOMMU_SUPPORT is not set +# CONFIG_MISC_FILESYSTEMS is not set +CONFIG_CRC16=y +# CONFIG_ENABLE_MUST_CHECK is not set +# CONFIG_SCHED_DEBUG is not set +# CONFIG_DEBUG_BUGVERBOSE is not set diff --git a/arch/c6x/configs/evmc6472_defconfig b/arch/c6x/configs/evmc6472_defconfig new file mode 100644 index 0000000..8c46155 --- /dev/null +++ b/arch/c6x/configs/evmc6472_defconfig @@ -0,0 +1,42 @@ +CONFIG_SOC_TMS320C6472=y +CONFIG_EXPERIMENTAL=y +# CONFIG_LOCALVERSION_AUTO is not set +CONFIG_SYSVIPC=y +CONFIG_SPARSE_IRQ=y +CONFIG_LOG_BUF_SHIFT=14 +CONFIG_NAMESPACES=y +# CONFIG_UTS_NS is not set +# CONFIG_USER_NS is not set +# CONFIG_PID_NS is not set +CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_SIZE=y +CONFIG_EXPERT=y +# CONFIG_FUTEX is not set +# CONFIG_SLUB_DEBUG is not set +CONFIG_MODULES=y +CONFIG_MODULE_FORCE_LOAD=y +CONFIG_MODULE_UNLOAD=y +CONFIG_MODULE_FORCE_UNLOAD=y +CONFIG_CMDLINE_BOOL=y +CONFIG_CMDLINE="" +# CONFIG_CMDLINE_FORCE is not set +CONFIG_BOARD_EVM6472=y +CONFIG_NO_HZ=y +CONFIG_HIGH_RES_TIMERS=y +CONFIG_BLK_DEV_LOOP=y +CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_RAM_COUNT=2 +CONFIG_BLK_DEV_RAM_SIZE=17000 +CONFIG_MISC_DEVICES=y +# CONFIG_INPUT is not set +# CONFIG_SERIO is not set +# CONFIG_VT is not set +# CONFIG_HW_RANDOM is not set +# CONFIG_HWMON is not set +# CONFIG_USB_SUPPORT is not set +# CONFIG_IOMMU_SUPPORT is not set +# CONFIG_MISC_FILESYSTEMS is not set +CONFIG_CRC16=y +# CONFIG_ENABLE_MUST_CHECK is not set +# CONFIG_SCHED_DEBUG is not set +# CONFIG_DEBUG_BUGVERBOSE is not set diff --git a/arch/c6x/configs/evmc6474_defconfig b/arch/c6x/configs/evmc6474_defconfig new file mode 100644 index 0000000..15533f6 --- /dev/null +++ b/arch/c6x/configs/evmc6474_defconfig @@ -0,0 +1,42 @@ +CONFIG_SOC_TMS320C6474=y +CONFIG_EXPERIMENTAL=y +# CONFIG_LOCALVERSION_AUTO is not set +CONFIG_SYSVIPC=y +CONFIG_SPARSE_IRQ=y +CONFIG_LOG_BUF_SHIFT=14 +CONFIG_NAMESPACES=y +# CONFIG_UTS_NS is not set +# CONFIG_USER_NS is not set +# CONFIG_PID_NS is not set +CONFIG_BLK_DEV_INITRD=y +CONFIG_CC_OPTIMIZE_FOR_SIZE=y +CONFIG_EXPERT=y +# CONFIG_FUTEX is not set +# CONFIG_SLUB_DEBUG is not set +CONFIG_MODULES=y +CONFIG_MODULE_FORCE_LOAD=y +CONFIG_MODULE_UNLOAD=y +CONFIG_MODULE_FORCE_UNLOAD=y +CONFIG_CMDLINE_BOOL=y +CONFIG_CMDLINE="" +# CONFIG_CMDLINE_FORCE is not set +CONFIG_BOARD_EVM6474=y +CONFIG_NO_HZ=y +CONFIG_HIGH_RES_TIMERS=y +CONFIG_BLK_DEV_LOOP=y +CONFIG_BLK_DEV_RAM=y +CONFIG_BLK_DEV_RAM_COUNT=2 +CONFIG_BLK_DEV_RAM_SIZE=17000 +CONFIG_MISC_DEVICES=y +# CONFIG_INPUT is not set +# CONFIG_SERIO is not set +# CONFIG_VT is not set +# CONFIG_HW_RANDOM is not set +# CONFIG_HWMON is not set +# CONFIG_USB_SUPPORT is not set +# CONFIG_IOMMU_SUPPORT is not set +# CONFIG_MISC_FILESYSTEMS is not set +CONFIG_CRC16=y +# CONFIG_ENABLE_MUST_CHECK is not set +# CONFIG_SCHED_DEBUG is not set +# CONFIG_DEBUG_BUGVERBOSE is not set diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild new file mode 100644 index 0000000..13dcf78a --- /dev/null +++ b/arch/c6x/include/asm/Kbuild @@ -0,0 +1,54 @@ +include include/asm-generic/Kbuild.asm + +generic-y += atomic.h +generic-y += auxvec.h +generic-y += bitsperlong.h +generic-y += bug.h +generic-y += bugs.h +generic-y += cputime.h +generic-y += current.h +generic-y += device.h +generic-y += div64.h +generic-y += dma.h +generic-y += emergency-restart.h +generic-y += errno.h +generic-y += fb.h +generic-y += fcntl.h +generic-y += futex.h +generic-y += hw_irq.h +generic-y += io.h +generic-y += ioctl.h +generic-y += ioctls.h +generic-y += ipcbuf.h +generic-y += irq_regs.h +generic-y += kdebug.h +generic-y += kmap_types.h +generic-y += local.h +generic-y += mman.h +generic-y += mmu_context.h +generic-y += msgbuf.h +generic-y += param.h +generic-y += pci.h +generic-y += percpu.h +generic-y += pgalloc.h +generic-y += poll.h +generic-y += posix_types.h +generic-y += resource.h +generic-y += scatterlist.h +generic-y += segment.h +generic-y += sembuf.h +generic-y += shmbuf.h +generic-y += shmparam.h +generic-y += siginfo.h +generic-y += socket.h +generic-y += sockios.h +generic-y += stat.h +generic-y += statfs.h +generic-y += termbits.h +generic-y += termios.h +generic-y += tlbflush.h +generic-y += topology.h +generic-y += types.h +generic-y += ucontext.h +generic-y += user.h +generic-y += vga.h diff --git a/arch/c6x/include/asm/asm-offsets.h b/arch/c6x/include/asm/asm-offsets.h new file mode 100644 index 0000000..d370ee3 --- /dev/null +++ b/arch/c6x/include/asm/asm-offsets.h @@ -0,0 +1 @@ +#include <generated/asm-offsets.h> diff --git a/arch/c6x/include/asm/bitops.h b/arch/c6x/include/asm/bitops.h new file mode 100644 index 0000000..39ab7e8 --- /dev/null +++ b/arch/c6x/include/asm/bitops.h @@ -0,0 +1,105 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_BITOPS_H +#define _ASM_C6X_BITOPS_H + +#ifdef __KERNEL__ + +#include <linux/bitops.h> + +#include <asm/system.h> +#include <asm/byteorder.h> + +/* + * clear_bit() doesn't provide any barrier for the compiler. + */ +#define smp_mb__before_clear_bit() barrier() +#define smp_mb__after_clear_bit() barrier() + +/* + * We are lucky, DSP is perfect for bitops: do it in 3 cycles + */ + +/** + * __ffs - find first bit in word. + * @word: The word to search + * + * Undefined if no bit exists, so code should check against 0 first. + * Note __ffs(0) = undef, __ffs(1) = 0, __ffs(0x80000000) = 31. + * + */ +static inline unsigned long __ffs(unsigned long x) +{ + asm (" bitr .M1 %0,%0\n" + " nop\n" + " lmbd .L1 1,%0,%0\n" + : "+a"(x)); + + return x; +} + +/* + * ffz - find first zero in word. + * @word: The word to search + * + * Undefined if no zero exists, so code should check against ~0UL first. + */ +#define ffz(x) __ffs(~(x)) + +/** + * fls - find last (most-significant) bit set + * @x: the word to search + * + * This is defined the same way as ffs. + * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. + */ +static inline int fls(int x) +{ + if (!x) + return 0; + + asm (" lmbd .L1 1,%0,%0\n" : "+a"(x)); + + return 32 - x; +} + +/** + * ffs - find first bit set + * @x: the word to search + * + * This is defined the same way as + * the libc and compiler builtin ffs routines, therefore + * differs in spirit from the above ffz (man ffs). + * Note ffs(0) = 0, ffs(1) = 1, ffs(0x80000000) = 32. + */ +static inline int ffs(int x) +{ + if (!x) + return 0; + + return __ffs(x) + 1; +} + +#include <asm-generic/bitops/__fls.h> +#include <asm-generic/bitops/fls64.h> +#include <asm-generic/bitops/find.h> + +#include <asm-generic/bitops/sched.h> +#include <asm-generic/bitops/hweight.h> +#include <asm-generic/bitops/lock.h> + +#include <asm-generic/bitops/atomic.h> +#include <asm-generic/bitops/non-atomic.h> +#include <asm-generic/bitops/le.h> +#include <asm-generic/bitops/ext2-atomic.h> + +#endif /* __KERNEL__ */ +#endif /* _ASM_C6X_BITOPS_H */ diff --git a/arch/c6x/include/asm/byteorder.h b/arch/c6x/include/asm/byteorder.h new file mode 100644 index 0000000..166038d --- /dev/null +++ b/arch/c6x/include/asm/byteorder.h @@ -0,0 +1,12 @@ +#ifndef _ASM_C6X_BYTEORDER_H +#define _ASM_C6X_BYTEORDER_H + +#include <asm/types.h> + +#ifdef _BIG_ENDIAN +#include <linux/byteorder/big_endian.h> +#else /* _BIG_ENDIAN */ +#include <linux/byteorder/little_endian.h> +#endif /* _BIG_ENDIAN */ + +#endif /* _ASM_BYTEORDER_H */ diff --git a/arch/c6x/include/asm/cache.h b/arch/c6x/include/asm/cache.h new file mode 100644 index 0000000..6d521d9 --- /dev/null +++ b/arch/c6x/include/asm/cache.h @@ -0,0 +1,90 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2005, 2006, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_CACHE_H +#define _ASM_C6X_CACHE_H + +#include <linux/irqflags.h> + +/* + * Cache line size + */ +#define L1D_CACHE_BYTES 64 +#define L1P_CACHE_BYTES 32 +#define L2_CACHE_BYTES 128 + +/* + * L2 used as cache + */ +#define L2MODE_SIZE L2MODE_256K_CACHE + +/* + * For practical reasons the L1_CACHE_BYTES defines should not be smaller than + * the L2 line size + */ +#define L1_CACHE_BYTES L2_CACHE_BYTES + +#define L2_CACHE_ALIGN_LOW(x) \ + (((x) & ~(L2_CACHE_BYTES - 1))) +#define L2_CACHE_ALIGN_UP(x) \ + (((x) + (L2_CACHE_BYTES - 1)) & ~(L2_CACHE_BYTES - 1)) +#define L2_CACHE_ALIGN_CNT(x) \ + (((x) + (sizeof(int) - 1)) & ~(sizeof(int) - 1)) + +#define ARCH_DMA_MINALIGN L1_CACHE_BYTES +#define ARCH_SLAB_MINALIGN L1_CACHE_BYTES + +/* + * This is the granularity of hardware cacheability control. + */ +#define CACHEABILITY_ALIGN 0x01000000 + +/* + * Align a physical address to MAR regions + */ +#define CACHE_REGION_START(v) \ + (((u32) (v)) & ~(CACHEABILITY_ALIGN - 1)) +#define CACHE_REGION_END(v) \ + (((u32) (v) + (CACHEABILITY_ALIGN - 1)) & ~(CACHEABILITY_ALIGN - 1)) + +extern void __init c6x_cache_init(void); + +extern void enable_caching(unsigned long start, unsigned long end); +extern void disable_caching(unsigned long start, unsigned long end); + +extern void L1_cache_off(void); +extern void L1_cache_on(void); + +extern void L1P_cache_global_invalidate(void); +extern void L1D_cache_global_invalidate(void); +extern void L1D_cache_global_writeback(void); +extern void L1D_cache_global_writeback_invalidate(void); +extern void L2_cache_set_mode(unsigned int mode); +extern void L2_cache_global_writeback_invalidate(void); +extern void L2_cache_global_writeback(void); + +extern void L1P_cache_block_invalidate(unsigned int start, unsigned int end); +extern void L1D_cache_block_invalidate(unsigned int start, unsigned int end); +extern void L1D_cache_block_writeback_invalidate(unsigned int start, + unsigned int end); +extern void L1D_cache_block_writeback(unsigned int start, unsigned int end); +extern void L2_cache_block_invalidate(unsigned int start, unsigned int end); +extern void L2_cache_block_writeback(unsigned int start, unsigned int end); +extern void L2_cache_block_writeback_invalidate(unsigned int start, + unsigned int end); +extern void L2_cache_block_invalidate_nowait(unsigned int start, + unsigned int end); +extern void L2_cache_block_writeback_nowait(unsigned int start, + unsigned int end); + +extern void L2_cache_block_writeback_invalidate_nowait(unsigned int start, + unsigned int end); + +#endif /* _ASM_C6X_CACHE_H */ diff --git a/arch/c6x/include/asm/cacheflush.h b/arch/c6x/include/asm/cacheflush.h new file mode 100644 index 0000000..df5db90 --- /dev/null +++ b/arch/c6x/include/asm/cacheflush.h @@ -0,0 +1,65 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_CACHEFLUSH_H +#define _ASM_C6X_CACHEFLUSH_H + +#include <linux/spinlock.h> + +#include <asm/setup.h> +#include <asm/cache.h> +#include <asm/mman.h> +#include <asm/page.h> +#include <asm/string.h> + +/* + * virtually-indexed cache management (our cache is physically indexed) + */ +#define flush_cache_all() do {} while (0) +#define flush_cache_mm(mm) do {} while (0) +#define flush_cache_dup_mm(mm) do {} while (0) +#define flush_cache_range(mm, start, end) do {} while (0) +#define flush_cache_page(vma, vmaddr, pfn) do {} while (0) +#define flush_cache_vmap(start, end) do {} while (0) +#define flush_cache_vunmap(start, end) do {} while (0) +#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 +#define flush_dcache_page(page) do {} while (0) +#define flush_dcache_mmap_lock(mapping) do {} while (0) +#define flush_dcache_mmap_unlock(mapping) do {} while (0) + +/* + * physically-indexed cache management + */ +#define flush_icache_range(s, e) \ +do { \ + L1D_cache_block_writeback((s), (e)); \ + L1P_cache_block_invalidate((s), (e)); \ +} while (0) + +#define flush_icache_page(vma, page) \ +do { \ + if ((vma)->vm_flags & PROT_EXEC) \ + L1D_cache_block_writeback_invalidate(page_address(page), \ + (unsigned long) page_address(page) + PAGE_SIZE)); \ + L1P_cache_block_invalidate(page_address(page), \ + (unsigned long) page_address(page) + PAGE_SIZE)); \ +} while (0) + + +#define copy_to_user_page(vma, page, vaddr, dst, src, len) \ +do { \ + memcpy(dst, src, len); \ + flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \ +} while (0) + +#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ + memcpy(dst, src, len) + +#endif /* _ASM_C6X_CACHEFLUSH_H */ diff --git a/arch/c6x/include/asm/checksum.h b/arch/c6x/include/asm/checksum.h new file mode 100644 index 0000000..7246816 --- /dev/null +++ b/arch/c6x/include/asm/checksum.h @@ -0,0 +1,34 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_CHECKSUM_H +#define _ASM_C6X_CHECKSUM_H + +static inline __wsum +csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, + unsigned short proto, __wsum sum) +{ + unsigned long long tmp; + + asm ("add .d1 %1,%5,%1\n" + "|| addu .l1 %3,%4,%0\n" + "addu .l1 %2,%0,%0\n" +#ifndef CONFIG_CPU_BIG_ENDIAN + "|| shl .s1 %1,8,%1\n" +#endif + "addu .l1 %1,%0,%0\n" + "add .l1 %P0,%p0,%2\n" + : "=&a"(tmp), "+a"(len), "+a"(sum) + : "a" (saddr), "a" (daddr), "a" (proto)); + return sum; +} +#define csum_tcpudp_nofold csum_tcpudp_nofold + +#include <asm-generic/checksum.h> + +#endif /* _ASM_C6X_CHECKSUM_H */ diff --git a/arch/c6x/include/asm/clkdev.h b/arch/c6x/include/asm/clkdev.h new file mode 100644 index 0000000..76a070b --- /dev/null +++ b/arch/c6x/include/asm/clkdev.h @@ -0,0 +1,22 @@ +#ifndef _ASM_CLKDEV_H +#define _ASM_CLKDEV_H + +#include <linux/slab.h> + +struct clk; + +static inline int __clk_get(struct clk *clk) +{ + return 1; +} + +static inline void __clk_put(struct clk *clk) +{ +} + +static inline struct clk_lookup_alloc *__clkdev_alloc(size_t size) +{ + return kzalloc(size, GFP_KERNEL); +} + +#endif /* _ASM_CLKDEV_H */ diff --git a/arch/c6x/include/asm/clock.h b/arch/c6x/include/asm/clock.h new file mode 100644 index 0000000..bcf42b2 --- /dev/null +++ b/arch/c6x/include/asm/clock.h @@ -0,0 +1,148 @@ +/* + * TI C64X clock definitions + * + * Copyright (C) 2010, 2011 Texas Instruments. + * Contributed by: Mark Salter <msalter@redhat.com> + * + * Copied heavily from arm/mach-davinci/clock.h, so: + * + * Copyright (C) 2006-2007 Texas Instruments. + * Copyright (C) 2008-2009 Deep Root Systems, LLC + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _ASM_C6X_CLOCK_H +#define _ASM_C6X_CLOCK_H + +#ifndef __ASSEMBLER__ + +#include <linux/list.h> + +/* PLL/Reset register offsets */ +#define PLLCTL 0x100 +#define PLLM 0x110 +#define PLLPRE 0x114 +#define PLLDIV1 0x118 +#define PLLDIV2 0x11c +#define PLLDIV3 0x120 +#define PLLPOST 0x128 +#define PLLCMD 0x138 +#define PLLSTAT 0x13c +#define PLLALNCTL 0x140 +#define PLLDCHANGE 0x144 +#define PLLCKEN 0x148 +#define PLLCKSTAT 0x14c +#define PLLSYSTAT 0x150 +#define PLLDIV4 0x160 +#define PLLDIV5 0x164 +#define PLLDIV6 0x168 +#define PLLDIV7 0x16c +#define PLLDIV8 0x170 +#define PLLDIV9 0x174 +#define PLLDIV10 0x178 +#define PLLDIV11 0x17c +#define PLLDIV12 0x180 +#define PLLDIV13 0x184 +#define PLLDIV14 0x188 +#define PLLDIV15 0x18c +#define PLLDIV16 0x190 + +/* PLLM register bits */ +#define PLLM_PLLM_MASK 0xff +#define PLLM_VAL(x) ((x) - 1) + +/* PREDIV register bits */ +#define PLLPREDIV_EN BIT(15) +#define PLLPREDIV_VAL(x) ((x) - 1) + +/* PLLCTL register bits */ +#define PLLCTL_PLLEN BIT(0) +#define PLLCTL_PLLPWRDN BIT(1) +#define PLLCTL_PLLRST BIT(3) +#define PLLCTL_PLLDIS BIT(4) +#define PLLCTL_PLLENSRC BIT(5) +#define PLLCTL_CLKMODE BIT(8) + +/* PLLCMD register bits */ +#define PLLCMD_GOSTAT BIT(0) + +/* PLLSTAT register bits */ +#define PLLSTAT_GOSTAT BIT(0) + +/* PLLDIV register bits */ +#define PLLDIV_EN BIT(15) +#define PLLDIV_RATIO_MASK 0x1f +#define PLLDIV_RATIO(x) ((x) - 1) + +struct pll_data; + +struct clk { + struct list_head node; + struct module *owner; + const char *name; + unsigned long rate; + int usecount; + u32 flags; + struct clk *parent; + struct list_head children; /* list of children */ + struct list_head childnode; /* parent's child list node */ + struct pll_data *pll_data; + u32 div; + unsigned long (*recalc) (struct clk *); + int (*set_rate) (struct clk *clk, unsigned long rate); + int (*round_rate) (struct clk *clk, unsigned long rate); +}; + +/* Clock flags: SoC-specific flags start at BIT(16) */ +#define ALWAYS_ENABLED BIT(1) +#define CLK_PLL BIT(2) /* PLL-derived clock */ +#define PRE_PLL BIT(3) /* source is before PLL mult/div */ +#define FIXED_DIV_PLL BIT(4) /* fixed divisor from PLL */ +#define FIXED_RATE_PLL BIT(5) /* fixed ouput rate PLL */ + +#define MAX_PLL_SYSCLKS 16 + +struct pll_data { + void __iomem *base; + u32 num; + u32 flags; + u32 input_rate; + u32 bypass_delay; /* in loops */ + u32 reset_delay; /* in loops */ + u32 lock_delay; /* in loops */ + struct clk sysclks[MAX_PLL_SYSCLKS + 1]; +}; + +/* pll_data flag bit */ +#define PLL_HAS_PRE BIT(0) +#define PLL_HAS_MUL BIT(1) +#define PLL_HAS_POST BIT(2) + +#define CLK(dev, con, ck) \ + { \ + .dev_id = dev, \ + .con_id = con, \ + .clk = ck, \ + } \ + +extern void c6x_clks_init(struct clk_lookup *clocks); +extern int clk_register(struct clk *clk); +extern void clk_unregister(struct clk *clk); +extern void c64x_setup_clocks(void); + +extern struct pll_data c6x_soc_pll1; + +extern struct clk clkin1; +extern struct clk c6x_core_clk; +extern struct clk c6x_i2c_clk; +extern struct clk c6x_watchdog_clk; +extern struct clk c6x_mcbsp1_clk; +extern struct clk c6x_mcbsp2_clk; +extern struct clk c6x_mdio_clk; + +#endif + +#endif /* _ASM_C6X_CLOCK_H */ diff --git a/arch/c6x/include/asm/delay.h b/arch/c6x/include/asm/delay.h new file mode 100644 index 0000000..f314c2e --- /dev/null +++ b/arch/c6x/include/asm/delay.h @@ -0,0 +1,67 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_DELAY_H +#define _ASM_C6X_DELAY_H + +#include <linux/kernel.h> + +extern unsigned int ticks_per_ns_scaled; + +static inline void __delay(unsigned long loops) +{ + uint32_t tmp; + + /* 6 cycles per loop */ + asm volatile (" mv .s1 %0,%1\n" + "0: [%1] b .s1 0b\n" + " add .l1 -6,%0,%0\n" + " cmplt .l1 1,%0,%1\n" + " nop 3\n" + : "+a"(loops), "=A"(tmp)); +} + +static inline void _c6x_tickdelay(unsigned int x) +{ + uint32_t cnt, endcnt; + + asm volatile (" mvc .s2 TSCL,%0\n" + " add .s2x %0,%1,%2\n" + " || mvk .l2 1,B0\n" + "0: [B0] b .s2 0b\n" + " mvc .s2 TSCL,%0\n" + " sub .s2 %0,%2,%0\n" + " cmpgt .l2 0,%0,B0\n" + " nop 2\n" + : "=b"(cnt), "+a"(x), "=b"(endcnt) : : "B0"); +} + +/* use scaled math to avoid slow division */ +#define C6X_NDELAY_SCALE 10 + +static inline void _ndelay(unsigned int n) +{ + _c6x_tickdelay((ticks_per_ns_scaled * n) >> C6X_NDELAY_SCALE); +} + +static inline void _udelay(unsigned int n) +{ + while (n >= 10) { + _ndelay(10000); + n -= 10; + } + while (n-- > 0) + _ndelay(1000); +} + +#define udelay(x) _udelay((unsigned int)(x)) +#define ndelay(x) _ndelay((unsigned int)(x)) + +#endif /* _ASM_C6X_DELAY_H */ diff --git a/arch/c6x/include/asm/dma-mapping.h b/arch/c6x/include/asm/dma-mapping.h new file mode 100644 index 0000000..03579fd --- /dev/null +++ b/arch/c6x/include/asm/dma-mapping.h @@ -0,0 +1,91 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#ifndef _ASM_C6X_DMA_MAPPING_H +#define _ASM_C6X_DMA_MAPPING_H + +#include <linux/dma-debug.h> +#include <asm-generic/dma-coherent.h> + +#define dma_supported(d, m) 1 + +static inline int dma_set_mask(struct device *dev, u64 dma_mask) +{ + if (!dev->dma_mask || !dma_supported(dev, dma_mask)) + return -EIO; + + *dev->dma_mask = dma_mask; + + return 0; +} + +/* + * DMA errors are defined by all-bits-set in the DMA address. + */ +static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr == ~0; +} + +extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr, + size_t size, enum dma_data_direction dir); + +extern void dma_unmap_single(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir); + +extern int dma_map_sg(struct device *dev, struct scatterlist *sglist, + int nents, enum dma_data_direction direction); + +extern void dma_unmap_sg(struct device *dev, struct scatterlist *sglist, + int nents, enum dma_data_direction direction); + +static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir) +{ + dma_addr_t handle; + + handle = dma_map_single(dev, page_address(page) + offset, size, dir); + + debug_dma_map_page(dev, page, offset, size, dir, handle, false); + + return handle; +} + +static inline void dma_unmap_page(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir) +{ + dma_unmap_single(dev, handle, size, dir); + + debug_dma_unmap_page(dev, handle, size, dir, false); +} + +extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir); + +extern void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, + size_t size, + enum dma_data_direction dir); + +extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir); + +extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir); + +extern void coherent_mem_init(u32 start, u32 size); +extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t); +extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t); + +#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent((d), (s), (h), (f)) +#define dma_free_noncoherent(d, s, v, h) dma_free_coherent((d), (s), (v), (h)) + +#endif /* _ASM_C6X_DMA_MAPPING_H */ diff --git a/arch/c6x/include/asm/dscr.h b/arch/c6x/include/asm/dscr.h new file mode 100644 index 0000000..561ba83 --- /dev/null +++ b/arch/c6x/include/asm/dscr.h @@ -0,0 +1,34 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#ifndef _ASM_C6X_DSCR_H +#define _ASM_C6X_DSCR_H + +enum dscr_devstate_t { + DSCR_DEVSTATE_ENABLED, + DSCR_DEVSTATE_DISABLED, +}; + +/* + * Set the device state of the device with the given ID. + * + * Individual drivers should use this to enable or disable the + * hardware device. The devid used to identify the device being + * controlled should be a property in the device's tree node. + */ +extern void dscr_set_devstate(int devid, enum dscr_devstate_t state); + +/* + * Assert or de-assert an RMII reset. + */ +extern void dscr_rmii_reset(int id, int assert); + +extern void dscr_probe(void); + +#endif /* _ASM_C6X_DSCR_H */ diff --git a/arch/c6x/include/asm/elf.h b/arch/c6x/include/asm/elf.h new file mode 100644 index 0000000..d57865b --- /dev/null +++ b/arch/c6x/include/asm/elf.h @@ -0,0 +1,113 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_ELF_H +#define _ASM_C6X_ELF_H + +/* + * ELF register definitions.. + */ +#include <asm/ptrace.h> + +typedef unsigned long elf_greg_t; +typedef unsigned long elf_fpreg_t; + +#define ELF_NGREG 58 +#define ELF_NFPREG 1 + +typedef elf_greg_t elf_gregset_t[ELF_NGREG]; +typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; + +/* + * This is used to ensure we don't load something for the wrong architecture. + */ +#define elf_check_arch(x) ((x)->e_machine == EM_TI_C6000) + +#define elf_check_const_displacement(x) (1) + +/* + * These are used to set parameters in the core dumps. + */ +#ifdef __LITTLE_ENDIAN__ +#define ELF_DATA ELFDATA2LSB +#else +#define ELF_DATA ELFDATA2MSB +#endif + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_TI_C6000 + +/* Nothing for now. Need to setup DP... */ +#define ELF_PLAT_INIT(_r) + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#define ELF_CORE_COPY_REGS(_dest, _regs) \ + memcpy((char *) &_dest, (char *) _regs, \ + sizeof(struct pt_regs)); + +/* This yields a mask that user programs can use to figure out what + instruction set this cpu supports. */ + +#define ELF_HWCAP (0) + +/* This yields a string that ld.so will use to load implementation + specific libraries for optimization. This is more specific in + intent than poking at uname or /proc/cpuinfo. */ + +#define ELF_PLATFORM (NULL) + +#define SET_PERSONALITY(ex) set_personality(PER_LINUX) + +/* C6X specific section types */ +#define SHT_C6000_UNWIND 0x70000001 +#define SHT_C6000_PREEMPTMAP 0x70000002 +#define SHT_C6000_ATTRIBUTES 0x70000003 + +/* C6X specific DT_ tags */ +#define DT_C6000_DSBT_BASE 0x70000000 +#define DT_C6000_DSBT_SIZE 0x70000001 +#define DT_C6000_PREEMPTMAP 0x70000002 +#define DT_C6000_DSBT_INDEX 0x70000003 + +/* C6X specific relocs */ +#define R_C6000_NONE 0 +#define R_C6000_ABS32 1 +#define R_C6000_ABS16 2 +#define R_C6000_ABS8 3 +#define R_C6000_PCR_S21 4 +#define R_C6000_PCR_S12 5 +#define R_C6000_PCR_S10 6 +#define R_C6000_PCR_S7 7 +#define R_C6000_ABS_S16 8 +#define R_C6000_ABS_L16 9 +#define R_C6000_ABS_H16 10 +#define R_C6000_SBR_U15_B 11 +#define R_C6000_SBR_U15_H 12 +#define R_C6000_SBR_U15_W 13 +#define R_C6000_SBR_S16 14 +#define R_C6000_SBR_L16_B 15 +#define R_C6000_SBR_L16_H 16 +#define R_C6000_SBR_L16_W 17 +#define R_C6000_SBR_H16_B 18 +#define R_C6000_SBR_H16_H 19 +#define R_C6000_SBR_H16_W 20 +#define R_C6000_SBR_GOT_U15_W 21 +#define R_C6000_SBR_GOT_L16_W 22 +#define R_C6000_SBR_GOT_H16_W 23 +#define R_C6000_DSBT_INDEX 24 +#define R_C6000_PREL31 25 +#define R_C6000_COPY 26 +#define R_C6000_ALIGN 253 +#define R_C6000_FPHEAD 254 +#define R_C6000_NOCMP 255 + +#endif /*_ASM_C6X_ELF_H */ diff --git a/arch/c6x/include/asm/ftrace.h b/arch/c6x/include/asm/ftrace.h new file mode 100644 index 0000000..3701958 --- /dev/null +++ b/arch/c6x/include/asm/ftrace.h @@ -0,0 +1,6 @@ +#ifndef _ASM_C6X_FTRACE_H +#define _ASM_C6X_FTRACE_H + +/* empty */ + +#endif /* _ASM_C6X_FTRACE_H */ diff --git a/arch/c6x/include/asm/hardirq.h b/arch/c6x/include/asm/hardirq.h new file mode 100644 index 0000000..9621954 --- /dev/null +++ b/arch/c6x/include/asm/hardirq.h @@ -0,0 +1,20 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _ASM_C6X_HARDIRQ_H +#define _ASM_C6X_HARDIRQ_H + +extern void ack_bad_irq(int irq); +#define ack_bad_irq ack_bad_irq + +#include <asm-generic/hardirq.h> + +#endif /* _ASM_C6X_HARDIRQ_H */ diff --git a/arch/c6x/include/asm/irq.h b/arch/c6x/include/asm/irq.h new file mode 100644 index 0000000..a6ae3c9 --- /dev/null +++ b/arch/c6x/include/asm/irq.h @@ -0,0 +1,302 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * Large parts taken directly from powerpc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_IRQ_H +#define _ASM_C6X_IRQ_H + +#include <linux/threads.h> +#include <linux/list.h> +#include <linux/radix-tree.h> +#include <asm/percpu.h> + +#define irq_canonicalize(irq) (irq) + +/* + * The C64X+ core has 16 IRQ vectors. One each is used by Reset and NMI. Two + * are reserved. The remaining 12 vectors are used to route SoC interrupts. + * These interrupt vectors are prioritized with IRQ 4 having the highest + * priority and IRQ 15 having the lowest. + * + * The C64x+ megamodule provides a PIC which combines SoC IRQ sources into a + * single core IRQ vector. There are four combined sources, each of which + * feed into one of the 12 general interrupt vectors. The remaining 8 vectors + * can each route a single SoC interrupt directly. + */ +#define NR_PRIORITY_IRQS 16 + +#define NR_IRQS_LEGACY NR_PRIORITY_IRQS + +/* Total number of virq in the platform */ +#define NR_IRQS 256 + +/* This number is used when no interrupt has been assigned */ +#define NO_IRQ 0 + +/* This type is the placeholder for a hardware interrupt number. It has to + * be big enough to enclose whatever representation is used by a given + * platform. + */ +typedef unsigned long irq_hw_number_t; + +/* Interrupt controller "host" data structure. This could be defined as a + * irq domain controller. That is, it handles the mapping between hardware + * and virtual interrupt numbers for a given interrupt domain. The host + * structure is generally created by the PIC code for a given PIC instance + * (though a host can cover more than one PIC if they have a flat number + * model). It's the host callbacks that are responsible for setting the + * irq_chip on a given irq_desc after it's been mapped. + * + * The host code and data structures are fairly agnostic to the fact that + * we use an open firmware device-tree. We do have references to struct + * device_node in two places: in irq_find_host() to find the host matching + * a given interrupt controller node, and of course as an argument to its + * counterpart host->ops->match() callback. However, those are treated as + * generic pointers by the core and the fact that it's actually a device-node + * pointer is purely a convention between callers and implementation. This + * code could thus be used on other architectures by replacing those two + * by some sort of arch-specific void * "token" used to identify interrupt + * controllers. + */ +struct irq_host; +struct radix_tree_root; +struct device_node; + +/* Functions below are provided by the host and called whenever a new mapping + * is created or an old mapping is disposed. The host can then proceed to + * whatever internal data structures management is required. It also needs + * to setup the irq_desc when returning from map(). + */ +struct irq_host_ops { + /* Match an interrupt controller device node to a host, returns + * 1 on a match + */ + int (*match)(struct irq_host *h, struct device_node *node); + + /* Create or update a mapping between a virtual irq number and a hw + * irq number. This is called only once for a given mapping. + */ + int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw); + + /* Dispose of such a mapping */ + void (*unmap)(struct irq_host *h, unsigned int virq); + + /* Translate device-tree interrupt specifier from raw format coming + * from the firmware to a irq_hw_number_t (interrupt line number) and + * type (sense) that can be passed to set_irq_type(). In the absence + * of this callback, irq_create_of_mapping() and irq_of_parse_and_map() + * will return the hw number in the first cell and IRQ_TYPE_NONE for + * the type (which amount to keeping whatever default value the + * interrupt controller has for that line) + */ + int (*xlate)(struct irq_host *h, struct device_node *ctrler, + const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_type); +}; + +struct irq_host { + struct list_head link; + + /* type of reverse mapping technique */ + unsigned int revmap_type; +#define IRQ_HOST_MAP_PRIORITY 0 /* core priority irqs, get irqs 1..15 */ +#define IRQ_HOST_MAP_NOMAP 1 /* no fast reverse mapping */ +#define IRQ_HOST_MAP_LINEAR 2 /* linear map of interrupts */ +#define IRQ_HOST_MAP_TREE 3 /* radix tree */ + union { + struct { + unsigned int size; + unsigned int *revmap; + } linear; + struct radix_tree_root tree; + } revmap_data; + struct irq_host_ops *ops; + void *host_data; + irq_hw_number_t inval_irq; + + /* Optional device node pointer */ + struct device_node *of_node; +}; + +struct irq_data; +extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d); +extern irq_hw_number_t virq_to_hw(unsigned int virq); +extern bool virq_is_host(unsigned int virq, struct irq_host *host); + +/** + * irq_alloc_host - Allocate a new irq_host data structure + * @of_node: optional device-tree node of the interrupt controller + * @revmap_type: type of reverse mapping to use + * @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map + * @ops: map/unmap host callbacks + * @inval_irq: provide a hw number in that host space that is always invalid + * + * Allocates and initialize and irq_host structure. Note that in the case of + * IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns + * for all legacy interrupts except 0 (which is always the invalid irq for + * a legacy controller). For a IRQ_HOST_MAP_LINEAR, the map is allocated by + * this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated + * later during boot automatically (the reverse mapping will use the slow path + * until that happens). + */ +extern struct irq_host *irq_alloc_host(struct device_node *of_node, + unsigned int revmap_type, + unsigned int revmap_arg, + struct irq_host_ops *ops, + irq_hw_number_t inval_irq); + + +/** + * irq_find_host - Locates a host for a given device node + * @node: device-tree node of the interrupt controller + */ +extern struct irq_host *irq_find_host(struct device_node *node); + + +/** + * irq_set_default_host - Set a "default" host + * @host: default host pointer + * + * For convenience, it's possible to set a "default" host that will be used + * whenever NULL is passed to irq_create_mapping(). It makes life easier for + * platforms that want to manipulate a few hard coded interrupt numbers that + * aren't properly represented in the device-tree. + */ +extern void irq_set_default_host(struct irq_host *host); + + +/** + * irq_set_virq_count - Set the maximum number of virt irqs + * @count: number of linux virtual irqs, capped with NR_IRQS + * + * This is mainly for use by platforms like iSeries who want to program + * the virtual irq number in the controller to avoid the reverse mapping + */ +extern void irq_set_virq_count(unsigned int count); + + +/** + * irq_create_mapping - Map a hardware interrupt into linux virq space + * @host: host owning this hardware interrupt or NULL for default host + * @hwirq: hardware irq number in that host space + * + * Only one mapping per hardware interrupt is permitted. Returns a linux + * virq number. + * If the sense/trigger is to be specified, set_irq_type() should be called + * on the number returned from that call. + */ +extern unsigned int irq_create_mapping(struct irq_host *host, + irq_hw_number_t hwirq); + + +/** + * irq_dispose_mapping - Unmap an interrupt + * @virq: linux virq number of the interrupt to unmap + */ +extern void irq_dispose_mapping(unsigned int virq); + +/** + * irq_find_mapping - Find a linux virq from an hw irq number. + * @host: host owning this hardware interrupt + * @hwirq: hardware irq number in that host space + * + * This is a slow path, for use by generic code. It's expected that an + * irq controller implementation directly calls the appropriate low level + * mapping function. + */ +extern unsigned int irq_find_mapping(struct irq_host *host, + irq_hw_number_t hwirq); + +/** + * irq_create_direct_mapping - Allocate a virq for direct mapping + * @host: host to allocate the virq for or NULL for default host + * + * This routine is used for irq controllers which can choose the hardware + * interrupt numbers they generate. In such a case it's simplest to use + * the linux virq as the hardware interrupt number. + */ +extern unsigned int irq_create_direct_mapping(struct irq_host *host); + +/** + * irq_radix_revmap_insert - Insert a hw irq to linux virq number mapping. + * @host: host owning this hardware interrupt + * @virq: linux irq number + * @hwirq: hardware irq number in that host space + * + * This is for use by irq controllers that use a radix tree reverse + * mapping for fast lookup. + */ +extern void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq, + irq_hw_number_t hwirq); + +/** + * irq_radix_revmap_lookup - Find a linux virq from a hw irq number. + * @host: host owning this hardware interrupt + * @hwirq: hardware irq number in that host space + * + * This is a fast path, for use by irq controller code that uses radix tree + * revmaps + */ +extern unsigned int irq_radix_revmap_lookup(struct irq_host *host, + irq_hw_number_t hwirq); + +/** + * irq_linear_revmap - Find a linux virq from a hw irq number. + * @host: host owning this hardware interrupt + * @hwirq: hardware irq number in that host space + * + * This is a fast path, for use by irq controller code that uses linear + * revmaps. It does fallback to the slow path if the revmap doesn't exist + * yet and will create the revmap entry with appropriate locking + */ + +extern unsigned int irq_linear_revmap(struct irq_host *host, + irq_hw_number_t hwirq); + + + +/** + * irq_alloc_virt - Allocate virtual irq numbers + * @host: host owning these new virtual irqs + * @count: number of consecutive numbers to allocate + * @hint: pass a hint number, the allocator will try to use a 1:1 mapping + * + * This is a low level function that is used internally by irq_create_mapping() + * and that can be used by some irq controllers implementations for things + * like allocating ranges of numbers for MSIs. The revmaps are left untouched. + */ +extern unsigned int irq_alloc_virt(struct irq_host *host, + unsigned int count, + unsigned int hint); + +/** + * irq_free_virt - Free virtual irq numbers + * @virq: virtual irq number of the first interrupt to free + * @count: number of interrupts to free + * + * This function is the opposite of irq_alloc_virt. It will not clear reverse + * maps, this should be done previously by unmap'ing the interrupt. In fact, + * all interrupts covered by the range being freed should have been unmapped + * prior to calling this. + */ +extern void irq_free_virt(unsigned int virq, unsigned int count); + +extern void __init init_pic_c64xplus(void); + +extern void init_IRQ(void); + +struct pt_regs; + +extern asmlinkage void c6x_do_IRQ(unsigned int prio, struct pt_regs *regs); + +extern unsigned long irq_err_count; + +#endif /* _ASM_C6X_IRQ_H */ diff --git a/arch/c6x/include/asm/irqflags.h b/arch/c6x/include/asm/irqflags.h new file mode 100644 index 0000000..cf78e09 --- /dev/null +++ b/arch/c6x/include/asm/irqflags.h @@ -0,0 +1,72 @@ +/* + * C6X IRQ flag handling + * + * Copyright (C) 2010 Texas Instruments Incorporated + * Written by Mark Salter (msalter@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ + +#ifndef _ASM_IRQFLAGS_H +#define _ASM_IRQFLAGS_H + +#ifndef __ASSEMBLY__ + +/* read interrupt enabled status */ +static inline unsigned long arch_local_save_flags(void) +{ + unsigned long flags; + + asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags)); + return flags; +} + +/* set interrupt enabled status */ +static inline void arch_local_irq_restore(unsigned long flags) +{ + asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags)); +} + +/* unconditionally enable interrupts */ +static inline void arch_local_irq_enable(void) +{ + unsigned long flags = arch_local_save_flags(); + flags |= 1; + arch_local_irq_restore(flags); +} + +/* unconditionally disable interrupts */ +static inline void arch_local_irq_disable(void) +{ + unsigned long flags = arch_local_save_flags(); + flags &= ~1; + arch_local_irq_restore(flags); +} + +/* get status and disable interrupts */ +static inline unsigned long arch_local_irq_save(void) +{ + unsigned long flags; + + flags = arch_local_save_flags(); + arch_local_irq_restore(flags & ~1); + return flags; +} + +/* test flags */ +static inline int arch_irqs_disabled_flags(unsigned long flags) +{ + return (flags & 1) == 0; +} + +/* test hardware interrupt enable bit */ +static inline int arch_irqs_disabled(void) +{ + return arch_irqs_disabled_flags(arch_local_save_flags()); +} + +#endif /* __ASSEMBLY__ */ +#endif /* __ASM_IRQFLAGS_H */ diff --git a/arch/c6x/include/asm/linkage.h b/arch/c6x/include/asm/linkage.h new file mode 100644 index 0000000..376925c --- /dev/null +++ b/arch/c6x/include/asm/linkage.h @@ -0,0 +1,30 @@ +#ifndef _ASM_C6X_LINKAGE_H +#define _ASM_C6X_LINKAGE_H + +#ifdef __ASSEMBLER__ + +#define __ALIGN .align 2 +#define __ALIGN_STR ".align 2" + +#ifndef __DSBT__ +#define ENTRY(name) \ + .global name @ \ + __ALIGN @ \ +name: +#else +#define ENTRY(name) \ + .global name @ \ + .hidden name @ \ + __ALIGN @ \ +name: +#endif + +#define ENDPROC(name) \ + .type name, @function @ \ + .size name, . - name + +#endif + +#include <asm-generic/linkage.h> + +#endif /* _ASM_C6X_LINKAGE_H */ diff --git a/arch/c6x/include/asm/megamod-pic.h b/arch/c6x/include/asm/megamod-pic.h new file mode 100644 index 0000000..eca0a86 --- /dev/null +++ b/arch/c6x/include/asm/megamod-pic.h @@ -0,0 +1,9 @@ +#ifndef _C6X_MEGAMOD_PIC_H +#define _C6X_MEGAMOD_PIC_H + +#ifdef __KERNEL__ + +extern void __init megamod_pic_init(void); + +#endif /* __KERNEL__ */ +#endif /* _C6X_MEGAMOD_PIC_H */ diff --git a/arch/c6x/include/asm/mmu.h b/arch/c6x/include/asm/mmu.h new file mode 100644 index 0000000..41592bf --- /dev/null +++ b/arch/c6x/include/asm/mmu.h @@ -0,0 +1,18 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_MMU_H +#define _ASM_C6X_MMU_H + +typedef struct { + unsigned long end_brk; +} mm_context_t; + +#endif /* _ASM_C6X_MMU_H */ diff --git a/arch/c6x/include/asm/module.h b/arch/c6x/include/asm/module.h new file mode 100644 index 0000000..a453f97 --- /dev/null +++ b/arch/c6x/include/asm/module.h @@ -0,0 +1,33 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * Updated for 2.6.34 by: Mark Salter (msalter@redhat.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_MODULE_H +#define _ASM_C6X_MODULE_H + +#define Elf_Shdr Elf32_Shdr +#define Elf_Sym Elf32_Sym +#define Elf_Ehdr Elf32_Ehdr +#define Elf_Addr Elf32_Addr +#define Elf_Word Elf32_Word + +/* + * This file contains the C6x architecture specific module code. + */ +struct mod_arch_specific { +}; + +struct loaded_sections { + unsigned int new_vaddr; + unsigned int loaded; +}; + +#endif /* _ASM_C6X_MODULE_H */ diff --git a/arch/c6x/include/asm/mutex.h b/arch/c6x/include/asm/mutex.h new file mode 100644 index 0000000..7a7248e --- /dev/null +++ b/arch/c6x/include/asm/mutex.h @@ -0,0 +1,6 @@ +#ifndef _ASM_C6X_MUTEX_H +#define _ASM_C6X_MUTEX_H + +#include <asm-generic/mutex-null.h> + +#endif /* _ASM_C6X_MUTEX_H */ diff --git a/arch/c6x/include/asm/page.h b/arch/c6x/include/asm/page.h new file mode 100644 index 0000000..d18e2b0 --- /dev/null +++ b/arch/c6x/include/asm/page.h @@ -0,0 +1,11 @@ +#ifndef _ASM_C6X_PAGE_H +#define _ASM_C6X_PAGE_H + +#define VM_DATA_DEFAULT_FLAGS \ + (VM_READ | VM_WRITE | \ + ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#include <asm-generic/page.h> + +#endif /* _ASM_C6X_PAGE_H */ diff --git a/arch/c6x/include/asm/pgtable.h b/arch/c6x/include/asm/pgtable.h new file mode 100644 index 0000000..68c8af4 --- /dev/null +++ b/arch/c6x/include/asm/pgtable.h @@ -0,0 +1,81 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_PGTABLE_H +#define _ASM_C6X_PGTABLE_H + +#include <asm-generic/4level-fixup.h> + +#include <asm/setup.h> +#include <asm/page.h> + +/* + * All 32bit addresses are effectively valid for vmalloc... + * Sort of meaningless for non-VM targets. + */ +#define VMALLOC_START 0 +#define VMALLOC_END 0xffffffff + +#define pgd_present(pgd) (1) +#define pgd_none(pgd) (0) +#define pgd_bad(pgd) (0) +#define pgd_clear(pgdp) +#define kern_addr_valid(addr) (1) + +#define pmd_offset(a, b) ((void *)0) +#define pmd_none(x) (!pmd_val(x)) +#define pmd_present(x) (pmd_val(x)) +#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) +#define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK) + +#define PAGE_NONE __pgprot(0) /* these mean nothing to NO_MM */ +#define PAGE_SHARED __pgprot(0) /* these mean nothing to NO_MM */ +#define PAGE_COPY __pgprot(0) /* these mean nothing to NO_MM */ +#define PAGE_READONLY __pgprot(0) /* these mean nothing to NO_MM */ +#define PAGE_KERNEL __pgprot(0) /* these mean nothing to NO_MM */ +#define pgprot_noncached(prot) (prot) + +extern void paging_init(void); + +#define __swp_type(x) (0) +#define __swp_offset(x) (0) +#define __swp_entry(typ, off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) +#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) +#define __swp_entry_to_pte(x) ((pte_t) { (x).val }) + +static inline int pte_file(pte_t pte) +{ + return 0; +} + +#define set_pte(pteptr, pteval) (*(pteptr) = pteval) +#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) + +/* + * ZERO_PAGE is a global shared page that is always zero: used + * for zero-mapped memory areas etc.. + */ +#define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page) +extern unsigned long empty_zero_page; + +#define swapper_pg_dir ((pgd_t *) 0) + +/* + * No page table caches to initialise + */ +#define pgtable_cache_init() do { } while (0) +#define io_remap_pfn_range remap_pfn_range + +#define io_remap_page_range(vma, vaddr, paddr, size, prot) \ + remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot) + +#include <asm-generic/pgtable.h> + +#endif /* _ASM_C6X_PGTABLE_H */ diff --git a/arch/c6x/include/asm/processor.h b/arch/c6x/include/asm/processor.h new file mode 100644 index 0000000..8154c4e --- /dev/null +++ b/arch/c6x/include/asm/processor.h @@ -0,0 +1,132 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * Updated for 2.6.34: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_PROCESSOR_H +#define _ASM_C6X_PROCESSOR_H + +#include <asm/ptrace.h> +#include <asm/page.h> +#include <asm/current.h> + +/* + * Default implementation of macro that returns current + * instruction pointer ("program counter"). + */ +#define current_text_addr() \ +({ \ + void *__pc; \ + asm("mvc .S2 pce1,%0\n" : "=b"(__pc)); \ + __pc; \ +}) + +/* + * User space process size. This is mostly meaningless for NOMMU + * but some C6X processors may have RAM addresses up to 0xFFFFFFFF. + * Since calls like mmap() can return an address or an error, we + * have to allow room for error returns when code does something + * like: + * + * addr = do_mmap(...) + * if ((unsigned long)addr >= TASK_SIZE) + * ... its an error code, not an address ... + * + * Here, we allow for 4096 error codes which means we really can't + * use the last 4K page on systems with RAM extending all the way + * to the end of the 32-bit address space. + */ +#define TASK_SIZE 0xFFFFF000 + +/* + * This decides where the kernel will search for a free chunk of vm + * space during mmap's. We won't be using it + */ +#define TASK_UNMAPPED_BASE 0 + +struct thread_struct { + unsigned long long b15_14; + unsigned long long a15_14; + unsigned long long b13_12; + unsigned long long a13_12; + unsigned long long b11_10; + unsigned long long a11_10; + unsigned long long ricl_icl; + unsigned long usp; /* user stack pointer */ + unsigned long pc; /* kernel pc */ + unsigned long wchan; +}; + +#define INIT_THREAD \ +{ \ + .usp = 0, \ + .wchan = 0, \ +} + +#define INIT_MMAP { \ + &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, \ + NULL, NULL } + +#define task_pt_regs(task) \ + ((struct pt_regs *)(THREAD_START_SP + task_stack_page(task)) - 1) + +#define alloc_kernel_stack() __get_free_page(GFP_KERNEL) +#define free_kernel_stack(page) free_page((page)) + + +/* Forward declaration, a strange C thing */ +struct task_struct; + +extern void start_thread(struct pt_regs *regs, unsigned int pc, + unsigned long usp); + +/* Free all resources held by a thread. */ +static inline void release_thread(struct task_struct *dead_task) +{ +} + +/* Prepare to copy thread state - unlazy all lazy status */ +#define prepare_to_copy(tsk) do { } while (0) + +extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); + +#define copy_segments(tsk, mm) do { } while (0) +#define release_segments(mm) do { } while (0) + +/* + * saved PC of a blocked thread. + */ +#define thread_saved_pc(tsk) (task_pt_regs(tsk)->pc) + +/* + * saved kernel SP and DP of a blocked thread. + */ +#ifdef _BIG_ENDIAN +#define thread_saved_ksp(tsk) \ + (*(unsigned long *)&(tsk)->thread.b15_14) +#define thread_saved_dp(tsk) \ + (*(((unsigned long *)&(tsk)->thread.b15_14) + 1)) +#else +#define thread_saved_ksp(tsk) \ + (*(((unsigned long *)&(tsk)->thread.b15_14) + 1)) +#define thread_saved_dp(tsk) \ + (*(unsigned long *)&(tsk)->thread.b15_14) +#endif + +extern unsigned long get_wchan(struct task_struct *p); + +#define KSTK_EIP(tsk) (task_pt_regs(task)->pc) +#define KSTK_ESP(tsk) (task_pt_regs(task)->sp) + +#define cpu_relax() do { } while (0) + +extern const struct seq_operations cpuinfo_op; + +#endif /* ASM_C6X_PROCESSOR_H */ diff --git a/arch/c6x/include/asm/procinfo.h b/arch/c6x/include/asm/procinfo.h new file mode 100644 index 0000000..c139d1e --- /dev/null +++ b/arch/c6x/include/asm/procinfo.h @@ -0,0 +1,28 @@ +/* + * Copyright (C) 2010 Texas Instruments Incorporated + * Author: Mark Salter (msalter@redhat.com) + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_PROCINFO_H +#define _ASM_C6X_PROCINFO_H + +#ifdef __KERNEL__ + +struct proc_info_list { + unsigned int cpu_val; + unsigned int cpu_mask; + const char *arch_name; + const char *elf_name; + unsigned int elf_hwcap; +}; + +#else /* __KERNEL__ */ +#include <asm/elf.h> +#warning "Please include asm/elf.h instead" +#endif /* __KERNEL__ */ + +#endif /* _ASM_C6X_PROCINFO_H */ diff --git a/arch/c6x/include/asm/prom.h b/arch/c6x/include/asm/prom.h new file mode 100644 index 0000000..b4ec95f --- /dev/null +++ b/arch/c6x/include/asm/prom.h @@ -0,0 +1 @@ +/* dummy prom.h; here to make linux/of.h's #includes happy */ diff --git a/arch/c6x/include/asm/ptrace.h b/arch/c6x/include/asm/ptrace.h new file mode 100644 index 0000000..21e8d79 --- /dev/null +++ b/arch/c6x/include/asm/ptrace.h @@ -0,0 +1,174 @@ +/* + * Copyright (C) 2004, 2006, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * Updated for 2.6.34: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_PTRACE_H +#define _ASM_C6X_PTRACE_H + +#define BKPT_OPCODE 0x56454314 /* illegal opcode */ + +#ifdef _BIG_ENDIAN +#define PT_LO(odd, even) odd +#define PT_HI(odd, even) even +#else +#define PT_LO(odd, even) even +#define PT_HI(odd, even) odd +#endif + +#define PT_A4_ORG PT_LO(1, 0) +#define PT_TSR PT_HI(1, 0) +#define PT_ILC PT_LO(3, 2) +#define PT_RILC PT_HI(3, 2) +#define PT_CSR PT_LO(5, 4) +#define PT_PC PT_HI(5, 4) +#define PT_B16 PT_LO(7, 6) +#define PT_B17 PT_HI(7, 6) +#define PT_B18 PT_LO(9, 8) +#define PT_B19 PT_HI(9, 8) +#define PT_B20 PT_LO(11, 10) +#define PT_B21 PT_HI(11, 10) +#define PT_B22 PT_LO(13, 12) +#define PT_B23 PT_HI(13, 12) +#define PT_B24 PT_LO(15, 14) +#define PT_B25 PT_HI(15, 14) +#define PT_B26 PT_LO(17, 16) +#define PT_B27 PT_HI(17, 16) +#define PT_B28 PT_LO(19, 18) +#define PT_B29 PT_HI(19, 18) +#define PT_B30 PT_LO(21, 20) +#define PT_B31 PT_HI(21, 20) +#define PT_B0 PT_LO(23, 22) +#define PT_B1 PT_HI(23, 22) +#define PT_B2 PT_LO(25, 24) +#define PT_B3 PT_HI(25, 24) +#define PT_B4 PT_LO(27, 26) +#define PT_B5 PT_HI(27, 26) +#define PT_B6 PT_LO(29, 28) +#define PT_B7 PT_HI(29, 28) +#define PT_B8 PT_LO(31, 30) +#define PT_B9 PT_HI(31, 30) +#define PT_B10 PT_LO(33, 32) +#define PT_B11 PT_HI(33, 32) +#define PT_B12 PT_LO(35, 34) +#define PT_B13 PT_HI(35, 34) +#define PT_A16 PT_LO(37, 36) +#define PT_A17 PT_HI(37, 36) +#define PT_A18 PT_LO(39, 38) +#define PT_A19 PT_HI(39, 38) +#define PT_A20 PT_LO(41, 40) +#define PT_A21 PT_HI(41, 40) +#define PT_A22 PT_LO(43, 42) +#define PT_A23 PT_HI(43, 42) +#define PT_A24 PT_LO(45, 44) +#define PT_A25 PT_HI(45, 44) +#define PT_A26 PT_LO(47, 46) +#define PT_A27 PT_HI(47, 46) +#define PT_A28 PT_LO(49, 48) +#define PT_A29 PT_HI(49, 48) +#define PT_A30 PT_LO(51, 50) +#define PT_A31 PT_HI(51, 50) +#define PT_A0 PT_LO(53, 52) +#define PT_A1 PT_HI(53, 52) +#define PT_A2 PT_LO(55, 54) +#define PT_A3 PT_HI(55, 54) +#define PT_A4 PT_LO(57, 56) +#define PT_A5 PT_HI(57, 56) +#define PT_A6 PT_LO(59, 58) +#define PT_A7 PT_HI(59, 58) +#define PT_A8 PT_LO(61, 60) +#define PT_A9 PT_HI(61, 60) +#define PT_A10 PT_LO(63, 62) +#define PT_A11 PT_HI(63, 62) +#define PT_A12 PT_LO(65, 64) +#define PT_A13 PT_HI(65, 64) +#define PT_A14 PT_LO(67, 66) +#define PT_A15 PT_HI(67, 66) +#define PT_B14 PT_LO(69, 68) +#define PT_B15 PT_HI(69, 68) + +#define NR_PTREGS 70 + +#define PT_DP PT_B14 /* Data Segment Pointer (B14) */ +#define PT_SP PT_B15 /* Stack Pointer (B15) */ + +#ifndef __ASSEMBLY__ + +#ifdef _BIG_ENDIAN +#define REG_PAIR(odd, even) unsigned long odd; unsigned long even +#else +#define REG_PAIR(odd, even) unsigned long even; unsigned long odd +#endif + +/* + * this struct defines the way the registers are stored on the + * stack during a system call. fields defined with REG_PAIR + * are saved and restored using double-word memory operations + * which means the word ordering of the pair depends on endianess. + */ +struct pt_regs { + REG_PAIR(tsr, orig_a4); + REG_PAIR(rilc, ilc); + REG_PAIR(pc, csr); + + REG_PAIR(b17, b16); + REG_PAIR(b19, b18); + REG_PAIR(b21, b20); + REG_PAIR(b23, b22); + REG_PAIR(b25, b24); + REG_PAIR(b27, b26); + REG_PAIR(b29, b28); + REG_PAIR(b31, b30); + + REG_PAIR(b1, b0); + REG_PAIR(b3, b2); + REG_PAIR(b5, b4); + REG_PAIR(b7, b6); + REG_PAIR(b9, b8); + REG_PAIR(b11, b10); + REG_PAIR(b13, b12); + + REG_PAIR(a17, a16); + REG_PAIR(a19, a18); + REG_PAIR(a21, a20); + REG_PAIR(a23, a22); + REG_PAIR(a25, a24); + REG_PAIR(a27, a26); + REG_PAIR(a29, a28); + REG_PAIR(a31, a30); + + REG_PAIR(a1, a0); + REG_PAIR(a3, a2); + REG_PAIR(a5, a4); + REG_PAIR(a7, a6); + REG_PAIR(a9, a8); + REG_PAIR(a11, a10); + REG_PAIR(a13, a12); + + REG_PAIR(a15, a14); + REG_PAIR(sp, dp); +}; + +#ifdef __KERNEL__ + +#include <linux/linkage.h> + +#define user_mode(regs) ((((regs)->tsr) & 0x40) != 0) + +#define instruction_pointer(regs) ((regs)->pc) +#define profile_pc(regs) instruction_pointer(regs) +#define user_stack_pointer(regs) ((regs)->sp) + +extern void show_regs(struct pt_regs *); + +extern asmlinkage unsigned long syscall_trace_entry(struct pt_regs *regs); +extern asmlinkage void syscall_trace_exit(struct pt_regs *regs); + +#endif /* __KERNEL__ */ +#endif /* __ASSEMBLY__ */ +#endif /* _ASM_C6X_PTRACE_H */ diff --git a/arch/c6x/include/asm/sections.h b/arch/c6x/include/asm/sections.h new file mode 100644 index 0000000..f703989 --- /dev/null +++ b/arch/c6x/include/asm/sections.h @@ -0,0 +1,12 @@ +#ifndef _ASM_C6X_SECTIONS_H +#define _ASM_C6X_SECTIONS_H + +#include <asm-generic/sections.h> + +extern char _vectors_start[]; +extern char _vectors_end[]; + +extern char _data_lma[]; +extern char _fdt_start[], _fdt_end[]; + +#endif /* _ASM_C6X_SECTIONS_H */ diff --git a/arch/c6x/include/asm/setup.h b/arch/c6x/include/asm/setup.h new file mode 100644 index 0000000..1808f27 --- /dev/null +++ b/arch/c6x/include/asm/setup.h @@ -0,0 +1,32 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_SETUP_H +#define _ASM_C6X_SETUP_H + +#define COMMAND_LINE_SIZE 1024 + +#ifndef __ASSEMBLY__ +extern char c6x_command_line[COMMAND_LINE_SIZE]; + +extern int c6x_add_memory(phys_addr_t start, unsigned long size); + +extern unsigned long ram_start; +extern unsigned long ram_end; + +extern int c6x_num_cores; +extern unsigned int c6x_silicon_rev; +extern unsigned int c6x_devstat; +extern unsigned char c6x_fuse_mac[6]; + +extern void machine_init(unsigned long dt_ptr); + +#endif /* !__ASSEMBLY__ */ +#endif /* _ASM_C6X_SETUP_H */ diff --git a/arch/c6x/include/asm/sigcontext.h b/arch/c6x/include/asm/sigcontext.h new file mode 100644 index 0000000..eb702f3 --- /dev/null +++ b/arch/c6x/include/asm/sigcontext.h @@ -0,0 +1,80 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_SIGCONTEXT_H +#define _ASM_C6X_SIGCONTEXT_H + + +struct sigcontext { + unsigned long sc_mask; /* old sigmask */ + unsigned long sc_sp; /* old user stack pointer */ + + unsigned long sc_a4; + unsigned long sc_b4; + unsigned long sc_a6; + unsigned long sc_b6; + unsigned long sc_a8; + unsigned long sc_b8; + + unsigned long sc_a0; + unsigned long sc_a1; + unsigned long sc_a2; + unsigned long sc_a3; + unsigned long sc_a5; + unsigned long sc_a7; + unsigned long sc_a9; + + unsigned long sc_b0; + unsigned long sc_b1; + unsigned long sc_b2; + unsigned long sc_b3; + unsigned long sc_b5; + unsigned long sc_b7; + unsigned long sc_b9; + + unsigned long sc_a16; + unsigned long sc_a17; + unsigned long sc_a18; + unsigned long sc_a19; + unsigned long sc_a20; + unsigned long sc_a21; + unsigned long sc_a22; + unsigned long sc_a23; + unsigned long sc_a24; + unsigned long sc_a25; + unsigned long sc_a26; + unsigned long sc_a27; + unsigned long sc_a28; + unsigned long sc_a29; + unsigned long sc_a30; + unsigned long sc_a31; + + unsigned long sc_b16; + unsigned long sc_b17; + unsigned long sc_b18; + unsigned long sc_b19; + unsigned long sc_b20; + unsigned long sc_b21; + unsigned long sc_b22; + unsigned long sc_b23; + unsigned long sc_b24; + unsigned long sc_b25; + unsigned long sc_b26; + unsigned long sc_b27; + unsigned long sc_b28; + unsigned long sc_b29; + unsigned long sc_b30; + unsigned long sc_b31; + + unsigned long sc_csr; + unsigned long sc_pc; +}; + +#endif /* _ASM_C6X_SIGCONTEXT_H */ diff --git a/arch/c6x/include/asm/signal.h b/arch/c6x/include/asm/signal.h new file mode 100644 index 0000000..f1cd870 --- /dev/null +++ b/arch/c6x/include/asm/signal.h @@ -0,0 +1,17 @@ +#ifndef _ASM_C6X_SIGNAL_H +#define _ASM_C6X_SIGNAL_H + +#include <asm-generic/signal.h> + +#ifndef __ASSEMBLY__ +#include <linux/linkage.h> + +struct pt_regs; + +extern asmlinkage int do_rt_sigreturn(struct pt_regs *regs); +extern asmlinkage void do_notify_resume(struct pt_regs *regs, + u32 thread_info_flags, + int syscall); +#endif + +#endif /* _ASM_C6X_SIGNAL_H */ diff --git a/arch/c6x/include/asm/soc.h b/arch/c6x/include/asm/soc.h new file mode 100644 index 0000000..43f5015 --- /dev/null +++ b/arch/c6x/include/asm/soc.h @@ -0,0 +1,35 @@ +/* + * Miscellaneous SoC-specific hooks. + * + * Copyright (C) 2011 Texas Instruments Incorporated + * + * Author: Mark Salter <msalter@redhat.com> + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ +#ifndef _ASM_C6X_SOC_H +#define _ASM_C6X_SOC_H + +struct soc_ops { + /* Return active exception event or -1 if none */ + int (*get_exception)(void); + + /* Assert an event */ + void (*assert_event)(unsigned int evt); +}; + +extern struct soc_ops soc_ops; + +extern int soc_get_exception(void); +extern void soc_assert_event(unsigned int event); +extern int soc_mac_addr(unsigned int index, u8 *addr); + +/* + * for mmio on SoC devices. regs are always same byte order as cpu. + */ +#define soc_readl(addr) __raw_readl(addr) +#define soc_writel(b, addr) __raw_writel((b), (addr)) + +#endif /* _ASM_C6X_SOC_H */ diff --git a/arch/c6x/include/asm/string.h b/arch/c6x/include/asm/string.h new file mode 100644 index 0000000..b21517c --- /dev/null +++ b/arch/c6x/include/asm/string.h @@ -0,0 +1,21 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_STRING_H +#define _ASM_C6X_STRING_H + +#include <asm/page.h> +#include <linux/linkage.h> + +asmlinkage extern void *memcpy(void *to, const void *from, size_t n); + +#define __HAVE_ARCH_MEMCPY + +#endif /* _ASM_C6X_STRING_H */ diff --git a/arch/c6x/include/asm/swab.h b/arch/c6x/include/asm/swab.h new file mode 100644 index 0000000..fd4bb05 --- /dev/null +++ b/arch/c6x/include/asm/swab.h @@ -0,0 +1,54 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_SWAB_H +#define _ASM_C6X_SWAB_H + +static inline __attribute_const__ __u16 __c6x_swab16(__u16 val) +{ + asm("swap4 .l1 %0,%0\n" : "+a"(val)); + return val; +} + +static inline __attribute_const__ __u32 __c6x_swab32(__u32 val) +{ + asm("swap4 .l1 %0,%0\n" + "swap2 .l1 %0,%0\n" + : "+a"(val)); + return val; +} + +static inline __attribute_const__ __u64 __c6x_swab64(__u64 val) +{ + asm(" swap2 .s1 %p0,%P0\n" + "|| swap2 .l1 %P0,%p0\n" + " swap4 .l1 %p0,%p0\n" + " swap4 .l1 %P0,%P0\n" + : "+a"(val)); + return val; +} + +static inline __attribute_const__ __u32 __c6x_swahw32(__u32 val) +{ + asm("swap2 .l1 %0,%0\n" : "+a"(val)); + return val; +} + +static inline __attribute_const__ __u32 __c6x_swahb32(__u32 val) +{ + asm("swap4 .l1 %0,%0\n" : "+a"(val)); + return val; +} + +#define __arch_swab16 __c6x_swab16 +#define __arch_swab32 __c6x_swab32 +#define __arch_swab64 __c6x_swab64 +#define __arch_swahw32 __c6x_swahw32 +#define __arch_swahb32 __c6x_swahb32 + +#endif /* _ASM_C6X_SWAB_H */ diff --git a/arch/c6x/include/asm/syscall.h b/arch/c6x/include/asm/syscall.h new file mode 100644 index 0000000..ae2be31 --- /dev/null +++ b/arch/c6x/include/asm/syscall.h @@ -0,0 +1,123 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * 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. + */ + +#ifndef __ASM_C6X_SYSCALL_H +#define __ASM_C6X_SYSCALL_H + +#include <linux/err.h> +#include <linux/sched.h> + +static inline int syscall_get_nr(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->b0; +} + +static inline void syscall_rollback(struct task_struct *task, + struct pt_regs *regs) +{ + /* do nothing */ +} + +static inline long syscall_get_error(struct task_struct *task, + struct pt_regs *regs) +{ + return IS_ERR_VALUE(regs->a4) ? regs->a4 : 0; +} + +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->a4; +} + +static inline void syscall_set_return_value(struct task_struct *task, + struct pt_regs *regs, + int error, long val) +{ + regs->a4 = error ?: val; +} + +static inline void syscall_get_arguments(struct task_struct *task, + struct pt_regs *regs, unsigned int i, + unsigned int n, unsigned long *args) +{ + switch (i) { + case 0: + if (!n--) + break; + *args++ = regs->a4; + case 1: + if (!n--) + break; + *args++ = regs->b4; + case 2: + if (!n--) + break; + *args++ = regs->a6; + case 3: + if (!n--) + break; + *args++ = regs->b6; + case 4: + if (!n--) + break; + *args++ = regs->a8; + case 5: + if (!n--) + break; + *args++ = regs->b8; + case 6: + if (!n--) + break; + default: + BUG(); + } +} + +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + const unsigned long *args) +{ + switch (i) { + case 0: + if (!n--) + break; + regs->a4 = *args++; + case 1: + if (!n--) + break; + regs->b4 = *args++; + case 2: + if (!n--) + break; + regs->a6 = *args++; + case 3: + if (!n--) + break; + regs->b6 = *args++; + case 4: + if (!n--) + break; + regs->a8 = *args++; + case 5: + if (!n--) + break; + regs->a9 = *args++; + case 6: + if (!n) + break; + default: + BUG(); + } +} + +#endif /* __ASM_C6X_SYSCALLS_H */ diff --git a/arch/c6x/include/asm/syscalls.h b/arch/c6x/include/asm/syscalls.h new file mode 100644 index 0000000..aed53da --- /dev/null +++ b/arch/c6x/include/asm/syscalls.h @@ -0,0 +1,55 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * 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, version 2. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#ifndef __ASM_C6X_SYSCALLS_H +#define __ASM_C6X_SYSCALLS_H + +#include <linux/compiler.h> +#include <linux/linkage.h> +#include <linux/types.h> + +/* The array of function pointers for syscalls. */ +extern void *sys_call_table[]; + +/* The following are trampolines in entry.S to handle 64-bit arguments */ +extern long sys_pread_c6x(unsigned int fd, char __user *buf, + size_t count, off_t pos_low, off_t pos_high); +extern long sys_pwrite_c6x(unsigned int fd, const char __user *buf, + size_t count, off_t pos_low, off_t pos_high); +extern long sys_truncate64_c6x(const char __user *path, + off_t length_low, off_t length_high); +extern long sys_ftruncate64_c6x(unsigned int fd, + off_t length_low, off_t length_high); +extern long sys_fadvise64_c6x(int fd, u32 offset_lo, u32 offset_hi, + u32 len, int advice); +extern long sys_fadvise64_64_c6x(int fd, u32 offset_lo, u32 offset_hi, + u32 len_lo, u32 len_hi, int advice); +extern long sys_fallocate_c6x(int fd, int mode, + u32 offset_lo, u32 offset_hi, + u32 len_lo, u32 len_hi); +extern int sys_cache_sync(unsigned long s, unsigned long e); + +struct pt_regs; + +extern asmlinkage long sys_c6x_clone(struct pt_regs *regs); +extern asmlinkage long sys_c6x_execve(const char __user *name, + const char __user *const __user *argv, + const char __user *const __user *envp, + struct pt_regs *regs); + + +#include <asm-generic/syscalls.h> + +#endif /* __ASM_C6X_SYSCALLS_H */ diff --git a/arch/c6x/include/asm/system.h b/arch/c6x/include/asm/system.h new file mode 100644 index 0000000..e076dc0 --- /dev/null +++ b/arch/c6x/include/asm/system.h @@ -0,0 +1,168 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_SYSTEM_H +#define _ASM_C6X_SYSTEM_H + +#include <linux/linkage.h> +#include <linux/irqflags.h> + +#define prepare_to_switch() do { } while (0) + +struct task_struct; +struct thread_struct; +asmlinkage void *__switch_to(struct thread_struct *prev, + struct thread_struct *next, + struct task_struct *tsk); + +#define switch_to(prev, next, last) \ + do { \ + current->thread.wchan = (u_long) __builtin_return_address(0); \ + (last) = __switch_to(&(prev)->thread, \ + &(next)->thread, (prev)); \ + mb(); \ + current->thread.wchan = 0; \ + } while (0) + +/* Reset the board */ +#define HARD_RESET_NOW() + +#define get_creg(reg) \ + ({ unsigned int __x; \ + asm volatile ("mvc .s2 " #reg ",%0\n" : "=b"(__x)); __x; }) + +#define set_creg(reg, v) \ + do { unsigned int __x = (unsigned int)(v); \ + asm volatile ("mvc .s2 %0," #reg "\n" : : "b"(__x)); \ + } while (0) + +#define or_creg(reg, n) \ + do { unsigned __x, __n = (unsigned)(n); \ + asm volatile ("mvc .s2 " #reg ",%0\n" \ + "or .l2 %1,%0,%0\n" \ + "mvc .s2 %0," #reg "\n" \ + "nop\n" \ + : "=&b"(__x) : "b"(__n)); \ + } while (0) + +#define and_creg(reg, n) \ + do { unsigned __x, __n = (unsigned)(n); \ + asm volatile ("mvc .s2 " #reg ",%0\n" \ + "and .l2 %1,%0,%0\n" \ + "mvc .s2 %0," #reg "\n" \ + "nop\n" \ + : "=&b"(__x) : "b"(__n)); \ + } while (0) + +#define get_coreid() (get_creg(DNUM) & 0xff) + +/* Set/get IST */ +#define set_ist(x) set_creg(ISTP, x) +#define get_ist() get_creg(ISTP) + +/* + * Exception management + */ +asmlinkage void enable_exception(void); +#define disable_exception() +#define get_except_type() get_creg(EFR) +#define ack_exception(type) set_creg(ECR, 1 << (type)) +#define get_iexcept() get_creg(IERR) +#define set_iexcept(mask) set_creg(IERR, (mask)) + +/* + * Misc. functions + */ +#define nop() asm("NOP\n"); +#define mb() barrier() +#define rmb() barrier() +#define wmb() barrier() +#define set_mb(var, value) do { var = value; mb(); } while (0) +#define set_wmb(var, value) do { var = value; wmb(); } while (0) + +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() +#define smp_read_barrier_depends() do { } while (0) + +#define xchg(ptr, x) \ + ((__typeof__(*(ptr)))__xchg((unsigned int)(x), (void *) (ptr), \ + sizeof(*(ptr)))) +#define tas(ptr) xchg((ptr), 1) + +unsigned int _lmbd(unsigned int, unsigned int); +unsigned int _bitr(unsigned int); + +struct __xchg_dummy { unsigned int a[100]; }; +#define __xg(x) ((volatile struct __xchg_dummy *)(x)) + +static inline unsigned int __xchg(unsigned int x, volatile void *ptr, int size) +{ + unsigned int tmp; + unsigned long flags; + + local_irq_save(flags); + + switch (size) { + case 1: + tmp = 0; + tmp = *((unsigned char *) ptr); + *((unsigned char *) ptr) = (unsigned char) x; + break; + case 2: + tmp = 0; + tmp = *((unsigned short *) ptr); + *((unsigned short *) ptr) = x; + break; + case 4: + tmp = 0; + tmp = *((unsigned int *) ptr); + *((unsigned int *) ptr) = x; + break; + } + local_irq_restore(flags); + return tmp; +} + +#include <asm-generic/cmpxchg-local.h> + +/* + * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make + * them available. + */ +#define cmpxchg_local(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \ + (unsigned long)(o), \ + (unsigned long)(n), \ + sizeof(*(ptr)))) +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) + +#include <asm-generic/cmpxchg.h> + +#define _extu(x, s, e) \ + ({ unsigned int __x; \ + asm volatile ("extu .S2 %3,%1,%2,%0\n" : \ + "=b"(__x) : "n"(s), "n"(e), "b"(x)); \ + __x; }) + + +extern unsigned int c6x_core_freq; + +struct pt_regs; + +extern void die(char *str, struct pt_regs *fp, int nr); +extern asmlinkage int process_exception(struct pt_regs *regs); +extern void time_init(void); +extern void free_initmem(void); + +extern void (*c6x_restart)(void); +extern void (*c6x_halt)(void); + +#endif /* _ASM_C6X_SYSTEM_H */ diff --git a/arch/c6x/include/asm/thread_info.h b/arch/c6x/include/asm/thread_info.h new file mode 100644 index 0000000..fd99148 --- /dev/null +++ b/arch/c6x/include/asm/thread_info.h @@ -0,0 +1,121 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * Updated for 2.6.3x: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_THREAD_INFO_H +#define _ASM_C6X_THREAD_INFO_H + +#ifdef __KERNEL__ + +#include <asm/page.h> + +#ifdef CONFIG_4KSTACKS +#define THREAD_SIZE 4096 +#define THREAD_SHIFT 12 +#define THREAD_ORDER 0 +#else +#define THREAD_SIZE 8192 +#define THREAD_SHIFT 13 +#define THREAD_ORDER 1 +#endif + +#define THREAD_START_SP (THREAD_SIZE - 8) + +#ifndef __ASSEMBLY__ + +typedef struct { + unsigned long seg; +} mm_segment_t; + +/* + * low level task data. + */ +struct thread_info { + struct task_struct *task; /* main task structure */ + struct exec_domain *exec_domain; /* execution domain */ + unsigned long flags; /* low level flags */ + int cpu; /* cpu we're on */ + int preempt_count; /* 0 = preemptable, <0 = BUG */ + mm_segment_t addr_limit; /* thread address space */ + struct restart_block restart_block; +}; + +/* + * macros/functions for gaining access to the thread information structure + * + * preempt_count needs to be 1 initially, until the scheduler is functional. + */ +#define INIT_THREAD_INFO(tsk) \ +{ \ + .task = &tsk, \ + .exec_domain = &default_exec_domain, \ + .flags = 0, \ + .cpu = 0, \ + .preempt_count = INIT_PREEMPT_COUNT, \ + .addr_limit = KERNEL_DS, \ + .restart_block = { \ + .fn = do_no_restart_syscall, \ + }, \ +} + +#define init_thread_info (init_thread_union.thread_info) +#define init_stack (init_thread_union.stack) + +/* get the thread information struct of current task */ +static inline __attribute__((const)) +struct thread_info *current_thread_info(void) +{ + struct thread_info *ti; + asm volatile (" clr .s2 B15,0,%1,%0\n" + : "=b" (ti) + : "Iu5" (THREAD_SHIFT - 1)); + return ti; +} + +#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR + +/* thread information allocation */ +#ifdef CONFIG_DEBUG_STACK_USAGE +#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) +#else +#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK) +#endif + +#define alloc_thread_info_node(tsk, node) \ + ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER)) + +#define free_thread_info(ti) free_pages((unsigned long) (ti), THREAD_ORDER) +#define get_thread_info(ti) get_task_struct((ti)->task) +#define put_thread_info(ti) put_task_struct((ti)->task) +#endif /* __ASSEMBLY__ */ + +#define PREEMPT_ACTIVE 0x10000000 + +/* + * thread information flag bit numbers + * - pending work-to-be-done flags are in LSW + * - other flags in MSW + */ +#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ +#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ +#define TIF_SIGPENDING 2 /* signal pending */ +#define TIF_NEED_RESCHED 3 /* rescheduling necessary */ +#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ + +#define TIF_POLLING_NRFLAG 16 /* true if polling TIF_NEED_RESCHED */ +#define TIF_MEMDIE 17 /* OOM killer killed process */ + +#define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */ +#define TIF_ALLWORK_MASK 0x00007FFF /* work on any return to u-space */ + +#endif /* __KERNEL__ */ + +#endif /* _ASM_C6X_THREAD_INFO_H */ diff --git a/arch/c6x/include/asm/timer64.h b/arch/c6x/include/asm/timer64.h new file mode 100644 index 0000000..bbe27bb --- /dev/null +++ b/arch/c6x/include/asm/timer64.h @@ -0,0 +1,6 @@ +#ifndef _C6X_TIMER64_H +#define _C6X_TIMER64_H + +extern void __init timer64_init(void); + +#endif /* _C6X_TIMER64_H */ diff --git a/arch/c6x/include/asm/timex.h b/arch/c6x/include/asm/timex.h new file mode 100644 index 0000000..508c3ec --- /dev/null +++ b/arch/c6x/include/asm/timex.h @@ -0,0 +1,33 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * Modified for 2.6.34: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_TIMEX_H +#define _ASM_C6X_TIMEX_H + +#define CLOCK_TICK_RATE ((1000 * 1000000UL) / 6) + +/* 64-bit timestamp */ +typedef unsigned long long cycles_t; + +static inline cycles_t get_cycles(void) +{ + unsigned l, h; + + asm volatile (" dint\n" + " mvc .s2 TSCL,%0\n" + " mvc .s2 TSCH,%1\n" + " rint\n" + : "=b"(l), "=b"(h)); + return ((cycles_t)h << 32) | l; +} + +#endif /* _ASM_C6X_TIMEX_H */ diff --git a/arch/c6x/include/asm/tlb.h b/arch/c6x/include/asm/tlb.h new file mode 100644 index 0000000..8709e5e --- /dev/null +++ b/arch/c6x/include/asm/tlb.h @@ -0,0 +1,8 @@ +#ifndef _ASM_C6X_TLB_H +#define _ASM_C6X_TLB_H + +#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm) + +#include <asm-generic/tlb.h> + +#endif /* _ASM_C6X_TLB_H */ diff --git a/arch/c6x/include/asm/traps.h b/arch/c6x/include/asm/traps.h new file mode 100644 index 0000000..62124d7 --- /dev/null +++ b/arch/c6x/include/asm/traps.h @@ -0,0 +1,36 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_TRAPS_H +#define _ASM_C6X_TRAPS_H + +#define EXCEPT_TYPE_NXF 31 /* NMI */ +#define EXCEPT_TYPE_EXC 30 /* external exception */ +#define EXCEPT_TYPE_IXF 1 /* internal exception */ +#define EXCEPT_TYPE_SXF 0 /* software exception */ + +#define EXCEPT_CAUSE_LBX (1 << 7) /* loop buffer exception */ +#define EXCEPT_CAUSE_PRX (1 << 6) /* privilege exception */ +#define EXCEPT_CAUSE_RAX (1 << 5) /* resource access exception */ +#define EXCEPT_CAUSE_RCX (1 << 4) /* resource conflict exception */ +#define EXCEPT_CAUSE_OPX (1 << 3) /* opcode exception */ +#define EXCEPT_CAUSE_EPX (1 << 2) /* execute packet exception */ +#define EXCEPT_CAUSE_FPX (1 << 1) /* fetch packet exception */ +#define EXCEPT_CAUSE_IFX (1 << 0) /* instruction fetch exception */ + +struct exception_info { + char *kernel_str; + int signo; + int code; +}; + +extern int (*c6x_nmi_handler)(struct pt_regs *regs); + +#endif /* _ASM_C6X_TRAPS_H */ diff --git a/arch/c6x/include/asm/uaccess.h b/arch/c6x/include/asm/uaccess.h new file mode 100644 index 0000000..453dd26 --- /dev/null +++ b/arch/c6x/include/asm/uaccess.h @@ -0,0 +1,107 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_UACCESS_H +#define _ASM_C6X_UACCESS_H + +#include <linux/types.h> +#include <linux/compiler.h> +#include <linux/string.h> + +#ifdef CONFIG_ACCESS_CHECK +#define __access_ok _access_ok +#endif + +/* + * __copy_from_user/copy_to_user are based on ones in asm-generic/uaccess.h + * + * C6X supports unaligned 32 and 64 bit loads and stores. + */ +static inline __must_check long __copy_from_user(void *to, + const void __user *from, unsigned long n) +{ + u32 tmp32; + u64 tmp64; + + if (__builtin_constant_p(n)) { + switch (n) { + case 1: + *(u8 *)to = *(u8 __force *)from; + return 0; + case 4: + asm volatile ("ldnw .d1t1 *%2,%0\n" + "nop 4\n" + "stnw .d1t1 %0,*%1\n" + : "=&a"(tmp32) + : "A"(to), "a"(from) + : "memory"); + return 0; + case 8: + asm volatile ("ldndw .d1t1 *%2,%0\n" + "nop 4\n" + "stndw .d1t1 %0,*%1\n" + : "=&a"(tmp64) + : "a"(to), "a"(from) + : "memory"); + return 0; + default: + break; + } + } + + memcpy(to, (const void __force *)from, n); + return 0; +} + +static inline __must_check long __copy_to_user(void __user *to, + const void *from, unsigned long n) +{ + u32 tmp32; + u64 tmp64; + + if (__builtin_constant_p(n)) { + switch (n) { + case 1: + *(u8 __force *)to = *(u8 *)from; + return 0; + case 4: + asm volatile ("ldnw .d1t1 *%2,%0\n" + "nop 4\n" + "stnw .d1t1 %0,*%1\n" + : "=&a"(tmp32) + : "a"(to), "a"(from) + : "memory"); + return 0; + case 8: + asm volatile ("ldndw .d1t1 *%2,%0\n" + "nop 4\n" + "stndw .d1t1 %0,*%1\n" + : "=&a"(tmp64) + : "a"(to), "a"(from) + : "memory"); + return 0; + default: + break; + } + } + + memcpy((void __force *)to, from, n); + return 0; +} + +#define __copy_to_user __copy_to_user +#define __copy_from_user __copy_from_user + +extern int _access_ok(unsigned long addr, unsigned long size); +#ifdef CONFIG_ACCESS_CHECK +#define __access_ok _access_ok +#endif + +#include <asm-generic/uaccess.h> + +#endif /* _ASM_C6X_UACCESS_H */ diff --git a/arch/c6x/include/asm/unaligned.h b/arch/c6x/include/asm/unaligned.h new file mode 100644 index 0000000..b976cb7 --- /dev/null +++ b/arch/c6x/include/asm/unaligned.h @@ -0,0 +1,170 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * Rewritten for 2.6.3x: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _ASM_C6X_UNALIGNED_H +#define _ASM_C6X_UNALIGNED_H + +#include <linux/swab.h> + +/* + * The C64x+ can do unaligned word and dword accesses in hardware + * using special load/store instructions. + */ + +static inline u16 get_unaligned_le16(const void *p) +{ + const u8 *_p = p; + return _p[0] | _p[1] << 8; +} + +static inline u16 get_unaligned_be16(const void *p) +{ + const u8 *_p = p; + return _p[0] << 8 | _p[1]; +} + +static inline void put_unaligned_le16(u16 val, void *p) +{ + u8 *_p = p; + _p[0] = val; + _p[1] = val >> 8; +} + +static inline void put_unaligned_be16(u16 val, void *p) +{ + u8 *_p = p; + _p[0] = val >> 8; + _p[1] = val; +} + +static inline u32 get_unaligned32(const void *p) +{ + u32 val = (u32) p; + asm (" ldnw .d1t1 *%0,%0\n" + " nop 4\n" + : "+a"(val)); + return val; +} + +static inline void put_unaligned32(u32 val, void *p) +{ + asm volatile (" stnw .d2t1 %0,*%1\n" + : : "a"(val), "b"(p) : "memory"); +} + +static inline u64 get_unaligned64(const void *p) +{ + u64 val; + asm volatile (" ldndw .d1t1 *%1,%0\n" + " nop 4\n" + : "=a"(val) : "a"(p)); + return val; +} + +static inline void put_unaligned64(u64 val, const void *p) +{ + asm volatile (" stndw .d2t1 %0,*%1\n" + : : "a"(val), "b"(p) : "memory"); +} + +#ifdef CONFIG_CPU_BIG_ENDIAN + +#define get_unaligned_le32(p) __swab32(get_unaligned32(p)) +#define get_unaligned_le64(p) __swab64(get_unaligned64(p)) +#define get_unaligned_be32(p) get_unaligned32(p) +#define get_unaligned_be64(p) get_unaligned64(p) +#define put_unaligned_le32(v, p) put_unaligned32(__swab32(v), (p)) +#define put_unaligned_le64(v, p) put_unaligned64(__swab64(v), (p)) +#define put_unaligned_be32(v, p) put_unaligned32((v), (p)) +#define put_unaligned_be64(v, p) put_unaligned64((v), (p)) +#define get_unaligned __get_unaligned_be +#define put_unaligned __put_unaligned_be + +#else + +#define get_unaligned_le32(p) get_unaligned32(p) +#define get_unaligned_le64(p) get_unaligned64(p) +#define get_unaligned_be32(p) __swab32(get_unaligned32(p)) +#define get_unaligned_be64(p) __swab64(get_unaligned64(p)) +#define put_unaligned_le32(v, p) put_unaligned32((v), (p)) +#define put_unaligned_le64(v, p) put_unaligned64((v), (p)) +#define put_unaligned_be32(v, p) put_unaligned32(__swab32(v), (p)) +#define put_unaligned_be64(v, p) put_unaligned64(__swab64(v), (p)) +#define get_unaligned __get_unaligned_le +#define put_unaligned __put_unaligned_le + +#endif + +/* + * Cause a link-time error if we try an unaligned access other than + * 1,2,4 or 8 bytes long + */ +extern int __bad_unaligned_access_size(void); + +#define __get_unaligned_le(ptr) (typeof(*(ptr)))({ \ + sizeof(*(ptr)) == 1 ? *(ptr) : \ + (sizeof(*(ptr)) == 2 ? get_unaligned_le16((ptr)) : \ + (sizeof(*(ptr)) == 4 ? get_unaligned_le32((ptr)) : \ + (sizeof(*(ptr)) == 8 ? get_unaligned_le64((ptr)) : \ + __bad_unaligned_access_size()))); \ + }) + +#define __get_unaligned_be(ptr) (__force typeof(*(ptr)))({ \ + sizeof(*(ptr)) == 1 ? *(ptr) : \ + (sizeof(*(ptr)) == 2 ? get_unaligned_be16((ptr)) : \ + (sizeof(*(ptr)) == 4 ? get_unaligned_be32((ptr)) : \ + (sizeof(*(ptr)) == 8 ? get_unaligned_be64((ptr)) : \ + __bad_unaligned_access_size()))); \ + }) + +#define __put_unaligned_le(val, ptr) ({ \ + void *__gu_p = (ptr); \ + switch (sizeof(*(ptr))) { \ + case 1: \ + *(u8 *)__gu_p = (__force u8)(val); \ + break; \ + case 2: \ + put_unaligned_le16((__force u16)(val), __gu_p); \ + break; \ + case 4: \ + put_unaligned_le32((__force u32)(val), __gu_p); \ + break; \ + case 8: \ + put_unaligned_le64((__force u64)(val), __gu_p); \ + break; \ + default: \ + __bad_unaligned_access_size(); \ + break; \ + } \ + (void)0; }) + +#define __put_unaligned_be(val, ptr) ({ \ + void *__gu_p = (ptr); \ + switch (sizeof(*(ptr))) { \ + case 1: \ + *(u8 *)__gu_p = (__force u8)(val); \ + break; \ + case 2: \ + put_unaligned_be16((__force u16)(val), __gu_p); \ + break; \ + case 4: \ + put_unaligned_be32((__force u32)(val), __gu_p); \ + break; \ + case 8: \ + put_unaligned_be64((__force u64)(val), __gu_p); \ + break; \ + default: \ + __bad_unaligned_access_size(); \ + break; \ + } \ + (void)0; }) + +#endif /* _ASM_C6X_UNALIGNED_H */ diff --git a/arch/c6x/include/asm/unistd.h b/arch/c6x/include/asm/unistd.h new file mode 100644 index 0000000..6d54ea4 --- /dev/null +++ b/arch/c6x/include/asm/unistd.h @@ -0,0 +1,26 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * + * Based on arch/tile version. + * + * 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, version 2. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ +#if !defined(_ASM_C6X_UNISTD_H) || defined(__SYSCALL) +#define _ASM_C6X_UNISTD_H + +/* Use the standard ABI for syscalls. */ +#include <asm-generic/unistd.h> + +/* C6X-specific syscalls. */ +#define __NR_cache_sync (__NR_arch_specific_syscall + 0) +__SYSCALL(__NR_cache_sync, sys_cache_sync) + +#endif /* _ASM_C6X_UNISTD_H */ diff --git a/arch/c6x/kernel/Makefile b/arch/c6x/kernel/Makefile new file mode 100644 index 0000000..580a515 --- /dev/null +++ b/arch/c6x/kernel/Makefile @@ -0,0 +1,12 @@ +# +# Makefile for arch/c6x/kernel/ +# + +extra-y := head.o vmlinux.lds + +obj-y := process.o traps.o irq.o signal.o ptrace.o +obj-y += setup.o sys_c6x.o time.o devicetree.o +obj-y += switch_to.o entry.o vectors.o c6x_ksyms.o +obj-y += soc.o dma.o + +obj-$(CONFIG_MODULES) += module.o diff --git a/arch/c6x/kernel/asm-offsets.c b/arch/c6x/kernel/asm-offsets.c new file mode 100644 index 0000000..759ad6d --- /dev/null +++ b/arch/c6x/kernel/asm-offsets.c @@ -0,0 +1,123 @@ +/* + * Generate definitions needed by assembly language modules. + * This code generates raw asm output which is post-processed + * to extract and format the required data. + */ + +#include <linux/sched.h> +#include <linux/thread_info.h> +#include <asm/procinfo.h> +#include <linux/kbuild.h> +#include <linux/unistd.h> + +void foo(void) +{ + OFFSET(REGS_A16, pt_regs, a16); + OFFSET(REGS_A17, pt_regs, a17); + OFFSET(REGS_A18, pt_regs, a18); + OFFSET(REGS_A19, pt_regs, a19); + OFFSET(REGS_A20, pt_regs, a20); + OFFSET(REGS_A21, pt_regs, a21); + OFFSET(REGS_A22, pt_regs, a22); + OFFSET(REGS_A23, pt_regs, a23); + OFFSET(REGS_A24, pt_regs, a24); + OFFSET(REGS_A25, pt_regs, a25); + OFFSET(REGS_A26, pt_regs, a26); + OFFSET(REGS_A27, pt_regs, a27); + OFFSET(REGS_A28, pt_regs, a28); + OFFSET(REGS_A29, pt_regs, a29); + OFFSET(REGS_A30, pt_regs, a30); + OFFSET(REGS_A31, pt_regs, a31); + + OFFSET(REGS_B16, pt_regs, b16); + OFFSET(REGS_B17, pt_regs, b17); + OFFSET(REGS_B18, pt_regs, b18); + OFFSET(REGS_B19, pt_regs, b19); + OFFSET(REGS_B20, pt_regs, b20); + OFFSET(REGS_B21, pt_regs, b21); + OFFSET(REGS_B22, pt_regs, b22); + OFFSET(REGS_B23, pt_regs, b23); + OFFSET(REGS_B24, pt_regs, b24); + OFFSET(REGS_B25, pt_regs, b25); + OFFSET(REGS_B26, pt_regs, b26); + OFFSET(REGS_B27, pt_regs, b27); + OFFSET(REGS_B28, pt_regs, b28); + OFFSET(REGS_B29, pt_regs, b29); + OFFSET(REGS_B30, pt_regs, b30); + OFFSET(REGS_B31, pt_regs, b31); + + OFFSET(REGS_A0, pt_regs, a0); + OFFSET(REGS_A1, pt_regs, a1); + OFFSET(REGS_A2, pt_regs, a2); + OFFSET(REGS_A3, pt_regs, a3); + OFFSET(REGS_A4, pt_regs, a4); + OFFSET(REGS_A5, pt_regs, a5); + OFFSET(REGS_A6, pt_regs, a6); + OFFSET(REGS_A7, pt_regs, a7); + OFFSET(REGS_A8, pt_regs, a8); + OFFSET(REGS_A9, pt_regs, a9); + OFFSET(REGS_A10, pt_regs, a10); + OFFSET(REGS_A11, pt_regs, a11); + OFFSET(REGS_A12, pt_regs, a12); + OFFSET(REGS_A13, pt_regs, a13); + OFFSET(REGS_A14, pt_regs, a14); + OFFSET(REGS_A15, pt_regs, a15); + + OFFSET(REGS_B0, pt_regs, b0); + OFFSET(REGS_B1, pt_regs, b1); + OFFSET(REGS_B2, pt_regs, b2); + OFFSET(REGS_B3, pt_regs, b3); + OFFSET(REGS_B4, pt_regs, b4); + OFFSET(REGS_B5, pt_regs, b5); + OFFSET(REGS_B6, pt_regs, b6); + OFFSET(REGS_B7, pt_regs, b7); + OFFSET(REGS_B8, pt_regs, b8); + OFFSET(REGS_B9, pt_regs, b9); + OFFSET(REGS_B10, pt_regs, b10); + OFFSET(REGS_B11, pt_regs, b11); + OFFSET(REGS_B12, pt_regs, b12); + OFFSET(REGS_B13, pt_regs, b13); + OFFSET(REGS_DP, pt_regs, dp); + OFFSET(REGS_SP, pt_regs, sp); + + OFFSET(REGS_TSR, pt_regs, tsr); + OFFSET(REGS_ORIG_A4, pt_regs, orig_a4); + + DEFINE(REGS__END, sizeof(struct pt_regs)); + BLANK(); + + OFFSET(THREAD_PC, thread_struct, pc); + OFFSET(THREAD_B15_14, thread_struct, b15_14); + OFFSET(THREAD_A15_14, thread_struct, a15_14); + OFFSET(THREAD_B13_12, thread_struct, b13_12); + OFFSET(THREAD_A13_12, thread_struct, a13_12); + OFFSET(THREAD_B11_10, thread_struct, b11_10); + OFFSET(THREAD_A11_10, thread_struct, a11_10); + OFFSET(THREAD_RICL_ICL, thread_struct, ricl_icl); + BLANK(); + + OFFSET(TASK_STATE, task_struct, state); + BLANK(); + + OFFSET(THREAD_INFO_FLAGS, thread_info, flags); + OFFSET(THREAD_INFO_PREEMPT_COUNT, thread_info, preempt_count); + BLANK(); + + /* These would be unneccessary if we ran asm files + * through the preprocessor. + */ + DEFINE(KTHREAD_SIZE, THREAD_SIZE); + DEFINE(KTHREAD_SHIFT, THREAD_SHIFT); + DEFINE(KTHREAD_START_SP, THREAD_START_SP); + DEFINE(ENOSYS_, ENOSYS); + DEFINE(NR_SYSCALLS_, __NR_syscalls); + + DEFINE(_TIF_SYSCALL_TRACE, (1<<TIF_SYSCALL_TRACE)); + DEFINE(_TIF_NOTIFY_RESUME, (1<<TIF_NOTIFY_RESUME)); + DEFINE(_TIF_SIGPENDING, (1<<TIF_SIGPENDING)); + DEFINE(_TIF_NEED_RESCHED, (1<<TIF_NEED_RESCHED)); + DEFINE(_TIF_POLLING_NRFLAG, (1<<TIF_POLLING_NRFLAG)); + + DEFINE(_TIF_ALLWORK_MASK, TIF_ALLWORK_MASK); + DEFINE(_TIF_WORK_MASK, TIF_WORK_MASK); +} diff --git a/arch/c6x/kernel/c6x_ksyms.c b/arch/c6x/kernel/c6x_ksyms.c new file mode 100644 index 0000000..0ba3e0b --- /dev/null +++ b/arch/c6x/kernel/c6x_ksyms.c @@ -0,0 +1,66 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#include <linux/module.h> +#include <asm/checksum.h> +#include <linux/io.h> + +/* + * libgcc functions - used internally by the compiler... + */ +extern int __c6xabi_divi(int dividend, int divisor); +EXPORT_SYMBOL(__c6xabi_divi); + +extern unsigned __c6xabi_divu(unsigned dividend, unsigned divisor); +EXPORT_SYMBOL(__c6xabi_divu); + +extern int __c6xabi_remi(int dividend, int divisor); +EXPORT_SYMBOL(__c6xabi_remi); + +extern unsigned __c6xabi_remu(unsigned dividend, unsigned divisor); +EXPORT_SYMBOL(__c6xabi_remu); + +extern int __c6xabi_divremi(int dividend, int divisor); +EXPORT_SYMBOL(__c6xabi_divremi); + +extern unsigned __c6xabi_divremu(unsigned dividend, unsigned divisor); +EXPORT_SYMBOL(__c6xabi_divremu); + +extern unsigned long long __c6xabi_mpyll(unsigned long long src1, + unsigned long long src2); +EXPORT_SYMBOL(__c6xabi_mpyll); + +extern long long __c6xabi_negll(long long src); +EXPORT_SYMBOL(__c6xabi_negll); + +extern unsigned long long __c6xabi_llshl(unsigned long long src1, uint src2); +EXPORT_SYMBOL(__c6xabi_llshl); + +extern long long __c6xabi_llshr(long long src1, uint src2); +EXPORT_SYMBOL(__c6xabi_llshr); + +extern unsigned long long __c6xabi_llshru(unsigned long long src1, uint src2); +EXPORT_SYMBOL(__c6xabi_llshru); + +extern void __c6xabi_strasgi(int *dst, const int *src, unsigned cnt); +EXPORT_SYMBOL(__c6xabi_strasgi); + +extern void __c6xabi_push_rts(void); +EXPORT_SYMBOL(__c6xabi_push_rts); + +extern void __c6xabi_pop_rts(void); +EXPORT_SYMBOL(__c6xabi_pop_rts); + +extern void __c6xabi_strasgi_64plus(int *dst, const int *src, unsigned cnt); +EXPORT_SYMBOL(__c6xabi_strasgi_64plus); + +/* lib functions */ +EXPORT_SYMBOL(memcpy); diff --git a/arch/c6x/kernel/devicetree.c b/arch/c6x/kernel/devicetree.c new file mode 100644 index 0000000..bdb56f0 --- /dev/null +++ b/arch/c6x/kernel/devicetree.c @@ -0,0 +1,53 @@ +/* + * Architecture specific OF callbacks. + * + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#include <linux/init.h> +#include <linux/of.h> +#include <linux/of_fdt.h> +#include <linux/initrd.h> +#include <linux/memblock.h> + +void __init early_init_devtree(void *params) +{ + /* Setup flat device-tree pointer */ + initial_boot_params = params; + + /* Retrieve various informations from the /chosen node of the + * device-tree, including the platform type, initrd location and + * size and more ... + */ + of_scan_flat_dt(early_init_dt_scan_chosen, c6x_command_line); + + /* Scan memory nodes and rebuild MEMBLOCKs */ + of_scan_flat_dt(early_init_dt_scan_root, NULL); + of_scan_flat_dt(early_init_dt_scan_memory, NULL); +} + + +#ifdef CONFIG_BLK_DEV_INITRD +void __init early_init_dt_setup_initrd_arch(unsigned long start, + unsigned long end) +{ + initrd_start = (unsigned long)__va(start); + initrd_end = (unsigned long)__va(end); + initrd_below_start_ok = 1; +} +#endif + +void __init early_init_dt_add_memory_arch(u64 base, u64 size) +{ + c6x_add_memory(base, size); +} + +void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) +{ + return __va(memblock_alloc(size, align)); +} diff --git a/arch/c6x/kernel/dma.c b/arch/c6x/kernel/dma.c new file mode 100644 index 0000000..ab7b12d --- /dev/null +++ b/arch/c6x/kernel/dma.c @@ -0,0 +1,153 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/dma-mapping.h> +#include <linux/mm.h> +#include <linux/mm_types.h> +#include <linux/scatterlist.h> + +#include <asm/cacheflush.h> + +static void c6x_dma_sync(dma_addr_t handle, size_t size, + enum dma_data_direction dir) +{ + unsigned long paddr = handle; + + BUG_ON(!valid_dma_direction(dir)); + + switch (dir) { + case DMA_FROM_DEVICE: + L2_cache_block_invalidate(paddr, paddr + size); + break; + case DMA_TO_DEVICE: + L2_cache_block_writeback(paddr, paddr + size); + break; + case DMA_BIDIRECTIONAL: + L2_cache_block_writeback_invalidate(paddr, paddr + size); + break; + default: + break; + } +} + +dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, + enum dma_data_direction dir) +{ + dma_addr_t addr = virt_to_phys(ptr); + + c6x_dma_sync(addr, size, dir); + + debug_dma_map_page(dev, virt_to_page(ptr), + (unsigned long)ptr & ~PAGE_MASK, size, + dir, addr, true); + return addr; +} +EXPORT_SYMBOL(dma_map_single); + + +void dma_unmap_single(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir) +{ + c6x_dma_sync(handle, size, dir); + + debug_dma_unmap_page(dev, handle, size, dir, true); +} +EXPORT_SYMBOL(dma_unmap_single); + + +int dma_map_sg(struct device *dev, struct scatterlist *sglist, + int nents, enum dma_data_direction dir) +{ + struct scatterlist *sg; + int i; + + for_each_sg(sglist, sg, nents, i) + sg->dma_address = dma_map_single(dev, sg_virt(sg), sg->length, + dir); + + debug_dma_map_sg(dev, sglist, nents, nents, dir); + + return nents; +} +EXPORT_SYMBOL(dma_map_sg); + + +void dma_unmap_sg(struct device *dev, struct scatterlist *sglist, + int nents, enum dma_data_direction dir) +{ + struct scatterlist *sg; + int i; + + for_each_sg(sglist, sg, nents, i) + dma_unmap_single(dev, sg_dma_address(sg), sg->length, dir); + + debug_dma_unmap_sg(dev, sglist, nents, dir); +} +EXPORT_SYMBOL(dma_unmap_sg); + +void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir) +{ + c6x_dma_sync(handle, size, dir); + + debug_dma_sync_single_for_cpu(dev, handle, size, dir); +} +EXPORT_SYMBOL(dma_sync_single_for_cpu); + + +void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, + size_t size, enum dma_data_direction dir) +{ + c6x_dma_sync(handle, size, dir); + + debug_dma_sync_single_for_device(dev, handle, size, dir); +} +EXPORT_SYMBOL(dma_sync_single_for_device); + + +void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, + int nents, enum dma_data_direction dir) +{ + struct scatterlist *sg; + int i; + + for_each_sg(sglist, sg, nents, i) + dma_sync_single_for_cpu(dev, sg_dma_address(sg), + sg->length, dir); + + debug_dma_sync_sg_for_cpu(dev, sglist, nents, dir); +} +EXPORT_SYMBOL(dma_sync_sg_for_cpu); + + +void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, + int nents, enum dma_data_direction dir) +{ + struct scatterlist *sg; + int i; + + for_each_sg(sglist, sg, nents, i) + dma_sync_single_for_device(dev, sg_dma_address(sg), + sg->length, dir); + + debug_dma_sync_sg_for_device(dev, sglist, nents, dir); +} +EXPORT_SYMBOL(dma_sync_sg_for_device); + + +/* Number of entries preallocated for DMA-API debugging */ +#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16) + +static int __init dma_init(void) +{ + dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES); + + return 0; +} +fs_initcall(dma_init); diff --git a/arch/c6x/kernel/entry.S b/arch/c6x/kernel/entry.S new file mode 100644 index 0000000..3e977cc --- /dev/null +++ b/arch/c6x/kernel/entry.S @@ -0,0 +1,803 @@ +; +; Port on Texas Instruments TMS320C6x architecture +; +; Copyright (C) 2004-2011 Texas Instruments Incorporated +; Author: Aurelien Jacquiot (aurelien.jacquiot@virtuallogix.com) +; Updated for 2.6.34: Mark Salter <msalter@redhat.com> +; +; This program is free software; you can redistribute it and/or modify +; it under the terms of the GNU General Public License version 2 as +; published by the Free Software Foundation. +; + +#include <linux/sys.h> +#include <linux/linkage.h> +#include <asm/thread_info.h> +#include <asm/asm-offsets.h> +#include <asm/unistd.h> +#include <asm/errno.h> + +; Registers naming +#define DP B14 +#define SP B15 + +#ifndef CONFIG_PREEMPT +#define resume_kernel restore_all +#endif + + .altmacro + + .macro MASK_INT reg + MVC .S2 CSR,reg + CLR .S2 reg,0,0,reg + MVC .S2 reg,CSR + .endm + + .macro UNMASK_INT reg + MVC .S2 CSR,reg + SET .S2 reg,0,0,reg + MVC .S2 reg,CSR + .endm + + .macro GET_THREAD_INFO reg + SHR .S1X SP,THREAD_SHIFT,reg + SHL .S1 reg,THREAD_SHIFT,reg + .endm + + ;; + ;; This defines the normal kernel pt_regs layout. + ;; + .macro SAVE_ALL __rp __tsr + STW .D2T2 B0,*SP--[2] ; save original B0 + MVKL .S2 current_ksp,B0 + MVKH .S2 current_ksp,B0 + LDW .D2T2 *B0,B1 ; KSP + + NOP 3 + STW .D2T2 B1,*+SP[1] ; save original B1 + XOR .D2 SP,B1,B0 ; (SP ^ KSP) + LDW .D2T2 *+SP[1],B1 ; restore B0/B1 + LDW .D2T2 *++SP[2],B0 + SHR .S2 B0,THREAD_SHIFT,B0 ; 0 if already using kstack + [B0] STDW .D2T2 SP:DP,*--B1[1] ; user: save user sp/dp kstack + [B0] MV .S2 B1,SP ; and switch to kstack +||[!B0] STDW .D2T2 SP:DP,*--SP[1] ; kernel: save on current stack + + SUBAW .D2 SP,2,SP + + ADD .D1X SP,-8,A15 + || STDW .D2T1 A15:A14,*SP--[16] ; save A15:A14 + + STDW .D2T2 B13:B12,*SP--[1] + || STDW .D1T1 A13:A12,*A15--[1] + || MVC .S2 __rp,B13 + + STDW .D2T2 B11:B10,*SP--[1] + || STDW .D1T1 A11:A10,*A15--[1] + || MVC .S2 CSR,B12 + + STDW .D2T2 B9:B8,*SP--[1] + || STDW .D1T1 A9:A8,*A15--[1] + || MVC .S2 RILC,B11 + STDW .D2T2 B7:B6,*SP--[1] + || STDW .D1T1 A7:A6,*A15--[1] + || MVC .S2 ILC,B10 + + STDW .D2T2 B5:B4,*SP--[1] + || STDW .D1T1 A5:A4,*A15--[1] + + STDW .D2T2 B3:B2,*SP--[1] + || STDW .D1T1 A3:A2,*A15--[1] + || MVC .S2 __tsr,B5 + + STDW .D2T2 B1:B0,*SP--[1] + || STDW .D1T1 A1:A0,*A15--[1] + || MV .S1X B5,A5 + + STDW .D2T2 B31:B30,*SP--[1] + || STDW .D1T1 A31:A30,*A15--[1] + STDW .D2T2 B29:B28,*SP--[1] + || STDW .D1T1 A29:A28,*A15--[1] + STDW .D2T2 B27:B26,*SP--[1] + || STDW .D1T1 A27:A26,*A15--[1] + STDW .D2T2 B25:B24,*SP--[1] + || STDW .D1T1 A25:A24,*A15--[1] + STDW .D2T2 B23:B22,*SP--[1] + || STDW .D1T1 A23:A22,*A15--[1] + STDW .D2T2 B21:B20,*SP--[1] + || STDW .D1T1 A21:A20,*A15--[1] + STDW .D2T2 B19:B18,*SP--[1] + || STDW .D1T1 A19:A18,*A15--[1] + STDW .D2T2 B17:B16,*SP--[1] + || STDW .D1T1 A17:A16,*A15--[1] + + STDW .D2T2 B13:B12,*SP--[1] ; save PC and CSR + + STDW .D2T2 B11:B10,*SP--[1] ; save RILC and ILC + STDW .D2T1 A5:A4,*SP--[1] ; save TSR and orig A4 + + ;; We left an unused word on the stack just above pt_regs. + ;; It is used to save whether or not this frame is due to + ;; a syscall. It is cleared here, but the syscall handler + ;; sets it to a non-zero value. + MVK .L2 0,B1 + STW .D2T2 B1,*+SP(REGS__END+8) ; clear syscall flag + .endm + + .macro RESTORE_ALL __rp __tsr + LDDW .D2T2 *++SP[1],B9:B8 ; get TSR (B9) + LDDW .D2T2 *++SP[1],B11:B10 ; get RILC (B11) and ILC (B10) + LDDW .D2T2 *++SP[1],B13:B12 ; get PC (B13) and CSR (B12) + + ADDAW .D1X SP,30,A15 + + LDDW .D1T1 *++A15[1],A17:A16 + || LDDW .D2T2 *++SP[1],B17:B16 + LDDW .D1T1 *++A15[1],A19:A18 + || LDDW .D2T2 *++SP[1],B19:B18 + LDDW .D1T1 *++A15[1],A21:A20 + || LDDW .D2T2 *++SP[1],B21:B20 + LDDW .D1T1 *++A15[1],A23:A22 + || LDDW .D2T2 *++SP[1],B23:B22 + LDDW .D1T1 *++A15[1],A25:A24 + || LDDW .D2T2 *++SP[1],B25:B24 + LDDW .D1T1 *++A15[1],A27:A26 + || LDDW .D2T2 *++SP[1],B27:B26 + LDDW .D1T1 *++A15[1],A29:A28 + || LDDW .D2T2 *++SP[1],B29:B28 + LDDW .D1T1 *++A15[1],A31:A30 + || LDDW .D2T2 *++SP[1],B31:B30 + + LDDW .D1T1 *++A15[1],A1:A0 + || LDDW .D2T2 *++SP[1],B1:B0 + + LDDW .D1T1 *++A15[1],A3:A2 + || LDDW .D2T2 *++SP[1],B3:B2 + || MVC .S2 B9,__tsr + LDDW .D1T1 *++A15[1],A5:A4 + || LDDW .D2T2 *++SP[1],B5:B4 + || MVC .S2 B11,RILC + LDDW .D1T1 *++A15[1],A7:A6 + || LDDW .D2T2 *++SP[1],B7:B6 + || MVC .S2 B10,ILC + + LDDW .D1T1 *++A15[1],A9:A8 + || LDDW .D2T2 *++SP[1],B9:B8 + || MVC .S2 B13,__rp + + LDDW .D1T1 *++A15[1],A11:A10 + || LDDW .D2T2 *++SP[1],B11:B10 + || MVC .S2 B12,CSR + + LDDW .D1T1 *++A15[1],A13:A12 + || LDDW .D2T2 *++SP[1],B13:B12 + + MV .D2X A15,SP + || MVKL .S1 current_ksp,A15 + MVKH .S1 current_ksp,A15 + || ADDAW .D1X SP,6,A14 + STW .D1T1 A14,*A15 ; save kernel stack pointer + + LDDW .D2T1 *++SP[1],A15:A14 + + B .S2 __rp ; return from interruption + LDDW .D2T2 *+SP[1],SP:DP + NOP 4 + .endm + + .section .text + + ;; + ;; Jump to schedule() then return to ret_from_exception + ;; +_reschedule: +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 schedule,A0 + MVKH .S1 schedule,A0 + B .S2X A0 +#else + B .S1 schedule +#endif + ADDKPC .S2 ret_from_exception,B3,4 + + ;; + ;; Called before syscall handler when process is being debugged + ;; +tracesys_on: +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 syscall_trace_entry,A0 + MVKH .S1 syscall_trace_entry,A0 + B .S2X A0 +#else + B .S1 syscall_trace_entry +#endif + ADDKPC .S2 ret_from_syscall_trace,B3,3 + ADD .S1X 8,SP,A4 + +ret_from_syscall_trace: + ;; tracing returns (possibly new) syscall number + MV .D2X A4,B0 + || MVK .S2 __NR_syscalls,B1 + CMPLTU .L2 B0,B1,B1 + + [!B1] BNOP .S2 ret_from_syscall_function,5 + || MVK .S1 -ENOSYS,A4 + + ;; reload syscall args from (possibly modified) stack frame + ;; and get syscall handler addr from sys_call_table: + LDW .D2T2 *+SP(REGS_B4+8),B4 + || MVKL .S2 sys_call_table,B1 + LDW .D2T1 *+SP(REGS_A6+8),A6 + || MVKH .S2 sys_call_table,B1 + LDW .D2T2 *+B1[B0],B0 + || MVKL .S2 ret_from_syscall_function,B3 + LDW .D2T2 *+SP(REGS_B6+8),B6 + || MVKH .S2 ret_from_syscall_function,B3 + LDW .D2T1 *+SP(REGS_A8+8),A8 + LDW .D2T2 *+SP(REGS_B8+8),B8 + NOP + ; B0 = sys_call_table[__NR_*] + BNOP .S2 B0,5 ; branch to syscall handler + || LDW .D2T1 *+SP(REGS_ORIG_A4+8),A4 + +syscall_exit_work: + AND .D1 _TIF_SYSCALL_TRACE,A2,A0 + [!A0] BNOP .S1 work_pending,5 + [A0] B .S2 syscall_trace_exit + ADDKPC .S2 resume_userspace,B3,1 + MVC .S2 CSR,B1 + SET .S2 B1,0,0,B1 + MVC .S2 B1,CSR ; enable ints + +work_pending: + AND .D1 _TIF_NEED_RESCHED,A2,A0 + [!A0] BNOP .S1 work_notifysig,5 + +work_resched: +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 schedule,A1 + MVKH .S1 schedule,A1 + B .S2X A1 +#else + B .S2 schedule +#endif + ADDKPC .S2 work_rescheduled,B3,4 +work_rescheduled: + ;; make sure we don't miss an interrupt setting need_resched or + ;; sigpending between sampling and the rti + MASK_INT B2 + GET_THREAD_INFO A12 + LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2 + MVK .S1 _TIF_WORK_MASK,A1 + MVK .S1 _TIF_NEED_RESCHED,A3 + NOP 2 + AND .D1 A1,A2,A0 + || AND .S1 A3,A2,A1 + [!A0] BNOP .S1 restore_all,5 + [A1] BNOP .S1 work_resched,5 + +work_notifysig: + B .S2 do_notify_resume + LDW .D2T1 *+SP(REGS__END+8),A6 ; syscall flag + ADDKPC .S2 resume_userspace,B3,1 + ADD .S1X 8,SP,A4 ; pt_regs pointer is first arg + MV .D2X A2,B4 ; thread_info flags is second arg + + ;; + ;; On C64x+, the return way from exception and interrupt + ;; is a little bit different + ;; +ENTRY(ret_from_exception) +#ifdef CONFIG_PREEMPT + MASK_INT B2 +#endif + +ENTRY(ret_from_interrupt) + ;; + ;; Check if we are comming from user mode. + ;; + LDW .D2T2 *+SP(REGS_TSR+8),B0 + MVK .S2 0x40,B1 + NOP 3 + AND .D2 B0,B1,B0 + [!B0] BNOP .S2 resume_kernel,5 + +resume_userspace: + ;; make sure we don't miss an interrupt setting need_resched or + ;; sigpending between sampling and the rti + MASK_INT B2 + GET_THREAD_INFO A12 + LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2 + MVK .S1 _TIF_WORK_MASK,A1 + MVK .S1 _TIF_NEED_RESCHED,A3 + NOP 2 + AND .D1 A1,A2,A0 + [A0] BNOP .S1 work_pending,5 + BNOP .S1 restore_all,5 + + ;; + ;; System call handling + ;; B0 = syscall number (in sys_call_table) + ;; A4,B4,A6,B6,A8,B8 = arguments of the syscall function + ;; A4 is the return value register + ;; +system_call_saved: + MVK .L2 1,B2 + STW .D2T2 B2,*+SP(REGS__END+8) ; set syscall flag + MVC .S2 B2,ECR ; ack the software exception + + UNMASK_INT B2 ; re-enable global IT + +system_call_saved_noack: + ;; Check system call number + MVK .S2 __NR_syscalls,B1 +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKL .S1 sys_ni_syscall,A0 +#endif + CMPLTU .L2 B0,B1,B1 +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKH .S1 sys_ni_syscall,A0 +#endif + + ;; Check for ptrace + GET_THREAD_INFO A12 + +#ifdef CONFIG_C6X_BIG_KERNEL + [!B1] B .S2X A0 +#else + [!B1] B .S2 sys_ni_syscall +#endif + [!B1] ADDKPC .S2 ret_from_syscall_function,B3,4 + + ;; Get syscall handler addr from sys_call_table + ;; call tracesys_on or call syscall handler + LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2 + || MVKL .S2 sys_call_table,B1 + MVKH .S2 sys_call_table,B1 + LDW .D2T2 *+B1[B0],B0 + NOP 2 + ; A2 = thread_info flags + AND .D1 _TIF_SYSCALL_TRACE,A2,A2 + [A2] BNOP .S1 tracesys_on,5 + ;; B0 = _sys_call_table[__NR_*] + B .S2 B0 + ADDKPC .S2 ret_from_syscall_function,B3,4 + +ret_from_syscall_function: + STW .D2T1 A4,*+SP(REGS_A4+8) ; save return value in A4 + ; original A4 is in orig_A4 +syscall_exit: + ;; make sure we don't miss an interrupt setting need_resched or + ;; sigpending between sampling and the rti + MASK_INT B2 + LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2 + MVK .S1 _TIF_ALLWORK_MASK,A1 + NOP 3 + AND .D1 A1,A2,A2 ; check for work to do + [A2] BNOP .S1 syscall_exit_work,5 + +restore_all: + RESTORE_ALL NRP,NTSR + + ;; + ;; After a fork we jump here directly from resume, + ;; so that A4 contains the previous task structure. + ;; +ENTRY(ret_from_fork) +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 schedule_tail,A0 + MVKH .S1 schedule_tail,A0 + B .S2X A0 +#else + B .S2 schedule_tail +#endif + ADDKPC .S2 ret_from_fork_2,B3,4 +ret_from_fork_2: + ;; return 0 in A4 for child process + GET_THREAD_INFO A12 + BNOP .S2 syscall_exit,3 + MVK .L2 0,B0 + STW .D2T2 B0,*+SP(REGS_A4+8) +ENDPROC(ret_from_fork) + + ;; + ;; These are the interrupt handlers, responsible for calling __do_IRQ() + ;; int6 is used for syscalls (see _system_call entry) + ;; + .macro SAVE_ALL_INT + SAVE_ALL IRP,ITSR + .endm + + .macro CALL_INT int +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 c6x_do_IRQ,A0 + MVKH .S1 c6x_do_IRQ,A0 + BNOP .S2X A0,1 + MVK .S1 int,A4 + ADDAW .D2 SP,2,B4 + MVKL .S2 ret_from_interrupt,B3 + MVKH .S2 ret_from_interrupt,B3 +#else + CALLP .S2 c6x_do_IRQ,B3 + || MVK .S1 int,A4 + || ADDAW .D2 SP,2,B4 + B .S1 ret_from_interrupt + NOP 5 +#endif + .endm + +ENTRY(_int4_handler) + SAVE_ALL_INT + CALL_INT 4 +ENDPROC(_int4_handler) + +ENTRY(_int5_handler) + SAVE_ALL_INT + CALL_INT 5 +ENDPROC(_int5_handler) + +ENTRY(_int6_handler) + SAVE_ALL_INT + CALL_INT 6 +ENDPROC(_int6_handler) + +ENTRY(_int7_handler) + SAVE_ALL_INT + CALL_INT 7 +ENDPROC(_int7_handler) + +ENTRY(_int8_handler) + SAVE_ALL_INT + CALL_INT 8 +ENDPROC(_int8_handler) + +ENTRY(_int9_handler) + SAVE_ALL_INT + CALL_INT 9 +ENDPROC(_int9_handler) + +ENTRY(_int10_handler) + SAVE_ALL_INT + CALL_INT 10 +ENDPROC(_int10_handler) + +ENTRY(_int11_handler) + SAVE_ALL_INT + CALL_INT 11 +ENDPROC(_int11_handler) + +ENTRY(_int12_handler) + SAVE_ALL_INT + CALL_INT 12 +ENDPROC(_int12_handler) + +ENTRY(_int13_handler) + SAVE_ALL_INT + CALL_INT 13 +ENDPROC(_int13_handler) + +ENTRY(_int14_handler) + SAVE_ALL_INT + CALL_INT 14 +ENDPROC(_int14_handler) + +ENTRY(_int15_handler) + SAVE_ALL_INT + CALL_INT 15 +ENDPROC(_int15_handler) + + ;; + ;; Handler for uninitialized and spurious interrupts + ;; +ENTRY(_bad_interrupt) + B .S2 IRP + NOP 5 +ENDPROC(_bad_interrupt) + + ;; + ;; Entry for NMI/exceptions/syscall + ;; +ENTRY(_nmi_handler) + SAVE_ALL NRP,NTSR + + MVC .S2 EFR,B2 + CMPEQ .L2 1,B2,B2 + || MVC .S2 TSR,B1 + CLR .S2 B1,10,10,B1 + MVC .S2 B1,TSR +#ifdef CONFIG_C6X_BIG_KERNEL + [!B2] MVKL .S1 process_exception,A0 + [!B2] MVKH .S1 process_exception,A0 + [!B2] B .S2X A0 +#else + [!B2] B .S2 process_exception +#endif + [B2] B .S2 system_call_saved + [!B2] ADDAW .D2 SP,2,B1 + [!B2] MV .D1X B1,A4 + ADDKPC .S2 ret_from_trap,B3,2 + +ret_from_trap: + MV .D2X A4,B0 + [!B0] BNOP .S2 ret_from_exception,5 + +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S2 system_call_saved_noack,B3 + MVKH .S2 system_call_saved_noack,B3 +#endif + LDW .D2T2 *+SP(REGS_B0+8),B0 + LDW .D2T1 *+SP(REGS_A4+8),A4 + LDW .D2T2 *+SP(REGS_B4+8),B4 + LDW .D2T1 *+SP(REGS_A6+8),A6 + LDW .D2T2 *+SP(REGS_B6+8),B6 + LDW .D2T1 *+SP(REGS_A8+8),A8 +#ifdef CONFIG_C6X_BIG_KERNEL + || B .S2 B3 +#else + || B .S2 system_call_saved_noack +#endif + LDW .D2T2 *+SP(REGS_B8+8),B8 + NOP 4 +ENDPROC(_nmi_handler) + + ;; + ;; Jump to schedule() then return to ret_from_isr + ;; +#ifdef CONFIG_PREEMPT +resume_kernel: + GET_THREAD_INFO A12 + LDW .D1T1 *+A12(THREAD_INFO_PREEMPT_COUNT),A1 + NOP 4 + [A1] BNOP .S2 restore_all,5 + +preempt_schedule: + GET_THREAD_INFO A2 + LDW .D1T1 *+A2(THREAD_INFO_FLAGS),A1 +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S2 preempt_schedule_irq,B0 + MVKH .S2 preempt_schedule_irq,B0 + NOP 2 +#else + NOP 4 +#endif + AND .D1 _TIF_NEED_RESCHED,A1,A1 + [!A1] BNOP .S2 restore_all,5 +#ifdef CONFIG_C6X_BIG_KERNEL + B .S2 B0 +#else + B .S2 preempt_schedule_irq +#endif + ADDKPC .S2 preempt_schedule,B3,4 +#endif /* CONFIG_PREEMPT */ + +ENTRY(enable_exception) + DINT + MVC .S2 TSR,B0 + MVC .S2 B3,NRP + MVK .L2 0xc,B1 + OR .D2 B0,B1,B0 + MVC .S2 B0,TSR ; Set GEE and XEN in TSR + B .S2 NRP + NOP 5 +ENDPROC(enable_exception) + +ENTRY(sys_sigaltstack) +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 do_sigaltstack,A0 ; branch to do_sigaltstack + MVKH .S1 do_sigaltstack,A0 + B .S2X A0 +#else + B .S2 do_sigaltstack +#endif + LDW .D2T1 *+SP(REGS_SP+8),A6 + NOP 4 +ENDPROC(sys_sigaltstack) + + ;; kernel_execve +ENTRY(kernel_execve) + MVK .S2 __NR_execve,B0 + SWE + BNOP .S2 B3,5 +ENDPROC(kernel_execve) + + ;; + ;; Special system calls + ;; return address is in B3 + ;; +ENTRY(sys_clone) + ADD .D1X SP,8,A4 +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKL .S1 sys_c6x_clone,A0 + MVKH .S1 sys_c6x_clone,A0 + BNOP .S2X A0,5 +#else + || B .S2 sys_c6x_clone + NOP 5 +#endif +ENDPROC(sys_clone) + +ENTRY(sys_rt_sigreturn) + ADD .D1X SP,8,A4 +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKL .S1 do_rt_sigreturn,A0 + MVKH .S1 do_rt_sigreturn,A0 + BNOP .S2X A0,5 +#else + || B .S2 do_rt_sigreturn + NOP 5 +#endif +ENDPROC(sys_rt_sigreturn) + +ENTRY(sys_execve) + ADDAW .D2 SP,2,B6 ; put regs addr in 4th parameter + ; & adjust regs stack addr + LDW .D2T2 *+SP(REGS_B4+8),B4 + + ;; c6x_execve(char *name, char **argv, + ;; char **envp, struct pt_regs *regs) +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKL .S1 sys_c6x_execve,A0 + MVKH .S1 sys_c6x_execve,A0 + B .S2X A0 +#else + || B .S2 sys_c6x_execve +#endif + STW .D2T2 B3,*SP--[2] + ADDKPC .S2 ret_from_c6x_execve,B3,3 + +ret_from_c6x_execve: + LDW .D2T2 *++SP[2],B3 + NOP 4 + BNOP .S2 B3,5 +ENDPROC(sys_execve) + +ENTRY(sys_pread_c6x) + MV .D2X A8,B7 +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKL .S1 sys_pread64,A0 + MVKH .S1 sys_pread64,A0 + BNOP .S2X A0,5 +#else + || B .S2 sys_pread64 + NOP 5 +#endif +ENDPROC(sys_pread_c6x) + +ENTRY(sys_pwrite_c6x) + MV .D2X A8,B7 +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKL .S1 sys_pwrite64,A0 + MVKH .S1 sys_pwrite64,A0 + BNOP .S2X A0,5 +#else + || B .S2 sys_pwrite64 + NOP 5 +#endif +ENDPROC(sys_pwrite_c6x) + +;; On Entry +;; A4 - path +;; B4 - offset_lo (LE), offset_hi (BE) +;; A6 - offset_lo (BE), offset_hi (LE) +ENTRY(sys_truncate64_c6x) +#ifdef CONFIG_CPU_BIG_ENDIAN + MV .S2 B4,B5 + MV .D2X A6,B4 +#else + MV .D2X A6,B5 +#endif +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKL .S1 sys_truncate64,A0 + MVKH .S1 sys_truncate64,A0 + BNOP .S2X A0,5 +#else + || B .S2 sys_truncate64 + NOP 5 +#endif +ENDPROC(sys_truncate64_c6x) + +;; On Entry +;; A4 - fd +;; B4 - offset_lo (LE), offset_hi (BE) +;; A6 - offset_lo (BE), offset_hi (LE) +ENTRY(sys_ftruncate64_c6x) +#ifdef CONFIG_CPU_BIG_ENDIAN + MV .S2 B4,B5 + MV .D2X A6,B4 +#else + MV .D2X A6,B5 +#endif +#ifdef CONFIG_C6X_BIG_KERNEL + || MVKL .S1 sys_ftruncate64,A0 + MVKH .S1 sys_ftruncate64,A0 + BNOP .S2X A0,5 +#else + || B .S2 sys_ftruncate64 + NOP 5 +#endif +ENDPROC(sys_ftruncate64_c6x) + +#ifdef __ARCH_WANT_SYSCALL_OFF_T +;; On Entry +;; A4 - fd +;; B4 - offset_lo (LE), offset_hi (BE) +;; A6 - offset_lo (BE), offset_hi (LE) +;; B6 - len +;; A8 - advice +ENTRY(sys_fadvise64_c6x) +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 sys_fadvise64,A0 + MVKH .S1 sys_fadvise64,A0 + BNOP .S2X A0,2 +#else + B .S2 sys_fadvise64 + NOP 2 +#endif +#ifdef CONFIG_CPU_BIG_ENDIAN + MV .L2 B4,B5 + || MV .D2X A6,B4 +#else + MV .D2X A6,B5 +#endif + MV .D1X B6,A6 + MV .D2X A8,B6 +#endif +ENDPROC(sys_fadvise64_c6x) + +;; On Entry +;; A4 - fd +;; B4 - offset_lo (LE), offset_hi (BE) +;; A6 - offset_lo (BE), offset_hi (LE) +;; B6 - len_lo (LE), len_hi (BE) +;; A8 - len_lo (BE), len_hi (LE) +;; B8 - advice +ENTRY(sys_fadvise64_64_c6x) +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 sys_fadvise64_64,A0 + MVKH .S1 sys_fadvise64_64,A0 + BNOP .S2X A0,2 +#else + B .S2 sys_fadvise64_64 + NOP 2 +#endif +#ifdef CONFIG_CPU_BIG_ENDIAN + MV .L2 B4,B5 + || MV .D2X A6,B4 + MV .L1 A8,A6 + || MV .D1X B6,A7 +#else + MV .D2X A6,B5 + MV .L1 A8,A7 + || MV .D1X B6,A6 +#endif + MV .L2 B8,B6 +ENDPROC(sys_fadvise64_64_c6x) + +;; On Entry +;; A4 - fd +;; B4 - mode +;; A6 - offset_hi +;; B6 - offset_lo +;; A8 - len_hi +;; B8 - len_lo +ENTRY(sys_fallocate_c6x) +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 sys_fallocate,A0 + MVKH .S1 sys_fallocate,A0 + BNOP .S2X A0,1 +#else + B .S2 sys_fallocate + NOP +#endif + MV .D1 A6,A7 + MV .D1X B6,A6 + MV .D2X A8,B7 + MV .D2 B8,B6 +ENDPROC(sys_fallocate_c6x) + + ;; put this in .neardata for faster access when using DSBT mode + .section .neardata,"aw",@progbits + .global current_ksp + .hidden current_ksp +current_ksp: + .word init_thread_union + THREAD_START_SP diff --git a/arch/c6x/kernel/head.S b/arch/c6x/kernel/head.S new file mode 100644 index 0000000..133eab6 --- /dev/null +++ b/arch/c6x/kernel/head.S @@ -0,0 +1,84 @@ +; +; Port on Texas Instruments TMS320C6x architecture +; +; Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated +; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) +; +; This program is free software; you can redistribute it and/or modify +; it under the terms of the GNU General Public License version 2 as +; published by the Free Software Foundation. +; +#include <linux/linkage.h> +#include <linux/of_fdt.h> +#include <asm/asm-offsets.h> + + __HEAD +ENTRY(_c_int00) + ;; Save magic and pointer + MV .S1 A4,A10 + MV .S2 B4,B10 + MVKL .S2 __bss_start,B5 + MVKH .S2 __bss_start,B5 + MVKL .S2 __bss_stop,B6 + MVKH .S2 __bss_stop,B6 + SUB .L2 B6,B5,B6 ; bss size + + ;; Set the stack pointer + MVKL .S2 current_ksp,B0 + MVKH .S2 current_ksp,B0 + LDW .D2T2 *B0,B15 + + ;; clear bss + SHR .S2 B6,3,B0 ; number of dwords to clear + ZERO .L2 B13 + ZERO .L2 B12 +bss_loop: + BDEC .S2 bss_loop,B0 + NOP 3 + CMPLT .L2 B0,0,B1 + [!B1] STDW .D2T2 B13:B12,*B5++[1] + + NOP 4 + AND .D2 ~7,B15,B15 + + ;; Clear GIE and PGIE + MVC .S2 CSR,B2 + CLR .S2 B2,0,1,B2 + MVC .S2 B2,CSR + MVC .S2 TSR,B2 + CLR .S2 B2,0,1,B2 + MVC .S2 B2,TSR + MVC .S2 ITSR,B2 + CLR .S2 B2,0,1,B2 + MVC .S2 B2,ITSR + MVC .S2 NTSR,B2 + CLR .S2 B2,0,1,B2 + MVC .S2 B2,NTSR + + ;; pass DTB pointer to machine_init (or zero if none) + MVKL .S1 OF_DT_HEADER,A0 + MVKH .S1 OF_DT_HEADER,A0 + CMPEQ .L1 A10,A0,A0 + [A0] MV .S1X B10,A4 + [!A0] MVK .S1 0,A4 + +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 machine_init,A0 + MVKH .S1 machine_init,A0 + B .S2X A0 + ADDKPC .S2 0f,B3,4 +0: +#else + CALLP .S2 machine_init,B3 +#endif + + ;; Jump to Linux init +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 start_kernel,A0 + MVKH .S1 start_kernel,A0 + B .S2X A0 +#else + B .S2 start_kernel +#endif + NOP 5 +L1: BNOP .S2 L1,5 diff --git a/arch/c6x/kernel/irq.c b/arch/c6x/kernel/irq.c new file mode 100644 index 0000000..0929e4b --- /dev/null +++ b/arch/c6x/kernel/irq.c @@ -0,0 +1,728 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * + * This borrows heavily from powerpc version, which is: + * + * Derived from arch/i386/kernel/irq.c + * Copyright (C) 1992 Linus Torvalds + * Adapted from arch/i386 by Gary Thomas + * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * Updated and modified by Cort Dougan <cort@fsmlabs.com> + * Copyright (C) 1996-2001 Cort Dougan + * Adapted for Power Macintosh by Paul Mackerras + * Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au) + * + * 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. + */ +#include <linux/slab.h> +#include <linux/seq_file.h> +#include <linux/radix-tree.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/interrupt.h> +#include <linux/kernel_stat.h> + +#include <asm/megamod-pic.h> + +unsigned long irq_err_count; + +static DEFINE_RAW_SPINLOCK(core_irq_lock); + +static void mask_core_irq(struct irq_data *data) +{ + unsigned int prio = data->irq; + + BUG_ON(prio < 4 || prio >= NR_PRIORITY_IRQS); + + raw_spin_lock(&core_irq_lock); + and_creg(IER, ~(1 << prio)); + raw_spin_unlock(&core_irq_lock); +} + +static void unmask_core_irq(struct irq_data *data) +{ + unsigned int prio = data->irq; + + raw_spin_lock(&core_irq_lock); + or_creg(IER, 1 << prio); + raw_spin_unlock(&core_irq_lock); +} + +static struct irq_chip core_chip = { + .name = "core", + .irq_mask = mask_core_irq, + .irq_unmask = unmask_core_irq, +}; + +asmlinkage void c6x_do_IRQ(unsigned int prio, struct pt_regs *regs) +{ + struct pt_regs *old_regs = set_irq_regs(regs); + + irq_enter(); + + BUG_ON(prio < 4 || prio >= NR_PRIORITY_IRQS); + + generic_handle_irq(prio); + + irq_exit(); + + set_irq_regs(old_regs); +} + +static struct irq_host *core_host; + +static int core_host_map(struct irq_host *h, unsigned int virq, + irq_hw_number_t hw) +{ + if (hw < 4 || hw >= NR_PRIORITY_IRQS) + return -EINVAL; + + irq_set_status_flags(virq, IRQ_LEVEL); + irq_set_chip_and_handler(virq, &core_chip, handle_level_irq); + return 0; +} + +static struct irq_host_ops core_host_ops = { + .map = core_host_map, +}; + +void __init init_IRQ(void) +{ + struct device_node *np; + + /* Mask all priority IRQs */ + and_creg(IER, ~0xfff0); + + np = of_find_compatible_node(NULL, NULL, "ti,c64x+core-pic"); + if (np != NULL) { + /* create the core host */ + core_host = irq_alloc_host(np, IRQ_HOST_MAP_PRIORITY, 0, + &core_host_ops, 0); + if (core_host) + irq_set_default_host(core_host); + of_node_put(np); + } + + printk(KERN_INFO "Core interrupt controller initialized\n"); + + /* now we're ready for other SoC controllers */ + megamod_pic_init(); + + /* Clear all general IRQ flags */ + set_creg(ICR, 0xfff0); +} + +void ack_bad_irq(int irq) +{ + printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq); + irq_err_count++; +} + +int arch_show_interrupts(struct seq_file *p, int prec) +{ + seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count); + return 0; +} + +/* + * IRQ controller and virtual interrupts + */ + +/* The main irq map itself is an array of NR_IRQ entries containing the + * associate host and irq number. An entry with a host of NULL is free. + * An entry can be allocated if it's free, the allocator always then sets + * hwirq first to the host's invalid irq number and then fills ops. + */ +struct irq_map_entry { + irq_hw_number_t hwirq; + struct irq_host *host; +}; + +static LIST_HEAD(irq_hosts); +static DEFINE_RAW_SPINLOCK(irq_big_lock); +static DEFINE_MUTEX(revmap_trees_mutex); +static struct irq_map_entry irq_map[NR_IRQS]; +static unsigned int irq_virq_count = NR_IRQS; +static struct irq_host *irq_default_host; + +irq_hw_number_t irqd_to_hwirq(struct irq_data *d) +{ + return irq_map[d->irq].hwirq; +} +EXPORT_SYMBOL_GPL(irqd_to_hwirq); + +irq_hw_number_t virq_to_hw(unsigned int virq) +{ + return irq_map[virq].hwirq; +} +EXPORT_SYMBOL_GPL(virq_to_hw); + +bool virq_is_host(unsigned int virq, struct irq_host *host) +{ + return irq_map[virq].host == host; +} +EXPORT_SYMBOL_GPL(virq_is_host); + +static int default_irq_host_match(struct irq_host *h, struct device_node *np) +{ + return h->of_node != NULL && h->of_node == np; +} + +struct irq_host *irq_alloc_host(struct device_node *of_node, + unsigned int revmap_type, + unsigned int revmap_arg, + struct irq_host_ops *ops, + irq_hw_number_t inval_irq) +{ + struct irq_host *host; + unsigned int size = sizeof(struct irq_host); + unsigned int i; + unsigned int *rmap; + unsigned long flags; + + /* Allocate structure and revmap table if using linear mapping */ + if (revmap_type == IRQ_HOST_MAP_LINEAR) + size += revmap_arg * sizeof(unsigned int); + host = kzalloc(size, GFP_KERNEL); + if (host == NULL) + return NULL; + + /* Fill structure */ + host->revmap_type = revmap_type; + host->inval_irq = inval_irq; + host->ops = ops; + host->of_node = of_node_get(of_node); + + if (host->ops->match == NULL) + host->ops->match = default_irq_host_match; + + raw_spin_lock_irqsave(&irq_big_lock, flags); + + /* Check for the priority controller. */ + if (revmap_type == IRQ_HOST_MAP_PRIORITY) { + if (irq_map[0].host != NULL) { + raw_spin_unlock_irqrestore(&irq_big_lock, flags); + of_node_put(host->of_node); + kfree(host); + return NULL; + } + irq_map[0].host = host; + } + + list_add(&host->link, &irq_hosts); + raw_spin_unlock_irqrestore(&irq_big_lock, flags); + + /* Additional setups per revmap type */ + switch (revmap_type) { + case IRQ_HOST_MAP_PRIORITY: + /* 0 is always the invalid number for priority */ + host->inval_irq = 0; + /* setup us as the host for all priority interrupts */ + for (i = 1; i < NR_PRIORITY_IRQS; i++) { + irq_map[i].hwirq = i; + smp_wmb(); + irq_map[i].host = host; + smp_wmb(); + + ops->map(host, i, i); + } + break; + case IRQ_HOST_MAP_LINEAR: + rmap = (unsigned int *)(host + 1); + for (i = 0; i < revmap_arg; i++) + rmap[i] = NO_IRQ; + host->revmap_data.linear.size = revmap_arg; + smp_wmb(); + host->revmap_data.linear.revmap = rmap; + break; + case IRQ_HOST_MAP_TREE: + INIT_RADIX_TREE(&host->revmap_data.tree, GFP_KERNEL); + break; + default: + break; + } + + pr_debug("irq: Allocated host of type %d @0x%p\n", revmap_type, host); + + return host; +} + +struct irq_host *irq_find_host(struct device_node *node) +{ + struct irq_host *h, *found = NULL; + unsigned long flags; + + /* We might want to match the legacy controller last since + * it might potentially be set to match all interrupts in + * the absence of a device node. This isn't a problem so far + * yet though... + */ + raw_spin_lock_irqsave(&irq_big_lock, flags); + list_for_each_entry(h, &irq_hosts, link) + if (h->ops->match(h, node)) { + found = h; + break; + } + raw_spin_unlock_irqrestore(&irq_big_lock, flags); + return found; +} +EXPORT_SYMBOL_GPL(irq_find_host); + +void irq_set_default_host(struct irq_host *host) +{ + pr_debug("irq: Default host set to @0x%p\n", host); + + irq_default_host = host; +} + +void irq_set_virq_count(unsigned int count) +{ + pr_debug("irq: Trying to set virq count to %d\n", count); + + BUG_ON(count < NR_PRIORITY_IRQS); + if (count < NR_IRQS) + irq_virq_count = count; +} + +static int irq_setup_virq(struct irq_host *host, unsigned int virq, + irq_hw_number_t hwirq) +{ + int res; + + res = irq_alloc_desc_at(virq, 0); + if (res != virq) { + pr_debug("irq: -> allocating desc failed\n"); + goto error; + } + + /* map it */ + smp_wmb(); + irq_map[virq].hwirq = hwirq; + smp_mb(); + + if (host->ops->map(host, virq, hwirq)) { + pr_debug("irq: -> mapping failed, freeing\n"); + goto errdesc; + } + + irq_clear_status_flags(virq, IRQ_NOREQUEST); + + return 0; + +errdesc: + irq_free_descs(virq, 1); +error: + irq_free_virt(virq, 1); + return -1; +} + +unsigned int irq_create_direct_mapping(struct irq_host *host) +{ + unsigned int virq; + + if (host == NULL) + host = irq_default_host; + + BUG_ON(host == NULL); + WARN_ON(host->revmap_type != IRQ_HOST_MAP_NOMAP); + + virq = irq_alloc_virt(host, 1, 0); + if (virq == NO_IRQ) { + pr_debug("irq: create_direct virq allocation failed\n"); + return NO_IRQ; + } + + pr_debug("irq: create_direct obtained virq %d\n", virq); + + if (irq_setup_virq(host, virq, virq)) + return NO_IRQ; + + return virq; +} + +unsigned int irq_create_mapping(struct irq_host *host, + irq_hw_number_t hwirq) +{ + unsigned int virq, hint; + + pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", host, hwirq); + + /* Look for default host if nececssary */ + if (host == NULL) + host = irq_default_host; + if (host == NULL) { + printk(KERN_WARNING "irq_create_mapping called for" + " NULL host, hwirq=%lx\n", hwirq); + WARN_ON(1); + return NO_IRQ; + } + pr_debug("irq: -> using host @%p\n", host); + + /* Check if mapping already exists */ + virq = irq_find_mapping(host, hwirq); + if (virq != NO_IRQ) { + pr_debug("irq: -> existing mapping on virq %d\n", virq); + return virq; + } + + /* Allocate a virtual interrupt number */ + hint = hwirq % irq_virq_count; + virq = irq_alloc_virt(host, 1, hint); + if (virq == NO_IRQ) { + pr_debug("irq: -> virq allocation failed\n"); + return NO_IRQ; + } + + if (irq_setup_virq(host, virq, hwirq)) + return NO_IRQ; + + pr_debug("irq: irq %lu on host %s mapped to virtual irq %u\n", + hwirq, host->of_node ? host->of_node->full_name : "null", virq); + + return virq; +} +EXPORT_SYMBOL_GPL(irq_create_mapping); + +unsigned int irq_create_of_mapping(struct device_node *controller, + const u32 *intspec, unsigned int intsize) +{ + struct irq_host *host; + irq_hw_number_t hwirq; + unsigned int type = IRQ_TYPE_NONE; + unsigned int virq; + + if (controller == NULL) + host = irq_default_host; + else + host = irq_find_host(controller); + if (host == NULL) { + printk(KERN_WARNING "irq: no irq host found for %s !\n", + controller->full_name); + return NO_IRQ; + } + + /* If host has no translation, then we assume interrupt line */ + if (host->ops->xlate == NULL) + hwirq = intspec[0]; + else { + if (host->ops->xlate(host, controller, intspec, intsize, + &hwirq, &type)) + return NO_IRQ; + } + + /* Create mapping */ + virq = irq_create_mapping(host, hwirq); + if (virq == NO_IRQ) + return virq; + + /* Set type if specified and different than the current one */ + if (type != IRQ_TYPE_NONE && + type != (irqd_get_trigger_type(irq_get_irq_data(virq)))) + irq_set_irq_type(virq, type); + return virq; +} +EXPORT_SYMBOL_GPL(irq_create_of_mapping); + +void irq_dispose_mapping(unsigned int virq) +{ + struct irq_host *host; + irq_hw_number_t hwirq; + + if (virq == NO_IRQ) + return; + + /* Never unmap priority interrupts */ + if (virq < NR_PRIORITY_IRQS) + return; + + host = irq_map[virq].host; + if (WARN_ON(host == NULL)) + return; + + irq_set_status_flags(virq, IRQ_NOREQUEST); + + /* remove chip and handler */ + irq_set_chip_and_handler(virq, NULL, NULL); + + /* Make sure it's completed */ + synchronize_irq(virq); + + /* Tell the PIC about it */ + if (host->ops->unmap) + host->ops->unmap(host, virq); + smp_mb(); + + /* Clear reverse map */ + hwirq = irq_map[virq].hwirq; + switch (host->revmap_type) { + case IRQ_HOST_MAP_LINEAR: + if (hwirq < host->revmap_data.linear.size) + host->revmap_data.linear.revmap[hwirq] = NO_IRQ; + break; + case IRQ_HOST_MAP_TREE: + mutex_lock(&revmap_trees_mutex); + radix_tree_delete(&host->revmap_data.tree, hwirq); + mutex_unlock(&revmap_trees_mutex); + break; + } + + /* Destroy map */ + smp_mb(); + irq_map[virq].hwirq = host->inval_irq; + + irq_free_descs(virq, 1); + /* Free it */ + irq_free_virt(virq, 1); +} +EXPORT_SYMBOL_GPL(irq_dispose_mapping); + +unsigned int irq_find_mapping(struct irq_host *host, + irq_hw_number_t hwirq) +{ + unsigned int i; + unsigned int hint = hwirq % irq_virq_count; + + /* Look for default host if nececssary */ + if (host == NULL) + host = irq_default_host; + if (host == NULL) + return NO_IRQ; + + /* Slow path does a linear search of the map */ + i = hint; + do { + if (irq_map[i].host == host && + irq_map[i].hwirq == hwirq) + return i; + i++; + if (i >= irq_virq_count) + i = 4; + } while (i != hint); + return NO_IRQ; +} +EXPORT_SYMBOL_GPL(irq_find_mapping); + +unsigned int irq_radix_revmap_lookup(struct irq_host *host, + irq_hw_number_t hwirq) +{ + struct irq_map_entry *ptr; + unsigned int virq; + + if (WARN_ON_ONCE(host->revmap_type != IRQ_HOST_MAP_TREE)) + return irq_find_mapping(host, hwirq); + + /* + * The ptr returned references the static global irq_map. + * but freeing an irq can delete nodes along the path to + * do the lookup via call_rcu. + */ + rcu_read_lock(); + ptr = radix_tree_lookup(&host->revmap_data.tree, hwirq); + rcu_read_unlock(); + + /* + * If found in radix tree, then fine. + * Else fallback to linear lookup - this should not happen in practice + * as it means that we failed to insert the node in the radix tree. + */ + if (ptr) + virq = ptr - irq_map; + else + virq = irq_find_mapping(host, hwirq); + + return virq; +} + +void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq, + irq_hw_number_t hwirq) +{ + if (WARN_ON(host->revmap_type != IRQ_HOST_MAP_TREE)) + return; + + if (virq != NO_IRQ) { + mutex_lock(&revmap_trees_mutex); + radix_tree_insert(&host->revmap_data.tree, hwirq, + &irq_map[virq]); + mutex_unlock(&revmap_trees_mutex); + } +} + +unsigned int irq_linear_revmap(struct irq_host *host, + irq_hw_number_t hwirq) +{ + unsigned int *revmap; + + if (WARN_ON_ONCE(host->revmap_type != IRQ_HOST_MAP_LINEAR)) + return irq_find_mapping(host, hwirq); + + /* Check revmap bounds */ + if (unlikely(hwirq >= host->revmap_data.linear.size)) + return irq_find_mapping(host, hwirq); + + /* Check if revmap was allocated */ + revmap = host->revmap_data.linear.revmap; + if (unlikely(revmap == NULL)) + return irq_find_mapping(host, hwirq); + + /* Fill up revmap with slow path if no mapping found */ + if (unlikely(revmap[hwirq] == NO_IRQ)) + revmap[hwirq] = irq_find_mapping(host, hwirq); + + return revmap[hwirq]; +} + +unsigned int irq_alloc_virt(struct irq_host *host, + unsigned int count, + unsigned int hint) +{ + unsigned long flags; + unsigned int i, j, found = NO_IRQ; + + if (count == 0 || count > (irq_virq_count - NR_PRIORITY_IRQS)) + return NO_IRQ; + + raw_spin_lock_irqsave(&irq_big_lock, flags); + + /* Use hint for 1 interrupt if any */ + if (count == 1 && hint >= NR_PRIORITY_IRQS && + hint < irq_virq_count && irq_map[hint].host == NULL) { + found = hint; + goto hint_found; + } + + /* Look for count consecutive numbers in the allocatable + * (non-legacy) space + */ + for (i = NR_PRIORITY_IRQS, j = 0; i < irq_virq_count; i++) { + if (irq_map[i].host != NULL) + j = 0; + else + j++; + + if (j == count) { + found = i - count + 1; + break; + } + } + if (found == NO_IRQ) { + raw_spin_unlock_irqrestore(&irq_big_lock, flags); + return NO_IRQ; + } + hint_found: + for (i = found; i < (found + count); i++) { + irq_map[i].hwirq = host->inval_irq; + smp_wmb(); + irq_map[i].host = host; + } + raw_spin_unlock_irqrestore(&irq_big_lock, flags); + return found; +} + +void irq_free_virt(unsigned int virq, unsigned int count) +{ + unsigned long flags; + unsigned int i; + + WARN_ON(virq < NR_PRIORITY_IRQS); + WARN_ON(count == 0 || (virq + count) > irq_virq_count); + + if (virq < NR_PRIORITY_IRQS) { + if (virq + count < NR_PRIORITY_IRQS) + return; + count -= NR_PRIORITY_IRQS - virq; + virq = NR_PRIORITY_IRQS; + } + + if (count > irq_virq_count || virq > irq_virq_count - count) { + if (virq > irq_virq_count) + return; + count = irq_virq_count - virq; + } + + raw_spin_lock_irqsave(&irq_big_lock, flags); + for (i = virq; i < (virq + count); i++) { + struct irq_host *host; + + host = irq_map[i].host; + irq_map[i].hwirq = host->inval_irq; + smp_wmb(); + irq_map[i].host = NULL; + } + raw_spin_unlock_irqrestore(&irq_big_lock, flags); +} + +#ifdef CONFIG_VIRQ_DEBUG +static int virq_debug_show(struct seq_file *m, void *private) +{ + unsigned long flags; + struct irq_desc *desc; + const char *p; + static const char none[] = "none"; + void *data; + int i; + + seq_printf(m, "%-5s %-7s %-15s %-18s %s\n", "virq", "hwirq", + "chip name", "chip data", "host name"); + + for (i = 1; i < nr_irqs; i++) { + desc = irq_to_desc(i); + if (!desc) + continue; + + raw_spin_lock_irqsave(&desc->lock, flags); + + if (desc->action && desc->action->handler) { + struct irq_chip *chip; + + seq_printf(m, "%5d ", i); + seq_printf(m, "0x%05lx ", irq_map[i].hwirq); + + chip = irq_desc_get_chip(desc); + if (chip && chip->name) + p = chip->name; + else + p = none; + seq_printf(m, "%-15s ", p); + + data = irq_desc_get_chip_data(desc); + seq_printf(m, "0x%16p ", data); + + if (irq_map[i].host && irq_map[i].host->of_node) + p = irq_map[i].host->of_node->full_name; + else + p = none; + seq_printf(m, "%s\n", p); + } + + raw_spin_unlock_irqrestore(&desc->lock, flags); + } + + return 0; +} + +static int virq_debug_open(struct inode *inode, struct file *file) +{ + return single_open(file, virq_debug_show, inode->i_private); +} + +static const struct file_operations virq_debug_fops = { + .open = virq_debug_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init irq_debugfs_init(void) +{ + if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root, + NULL, &virq_debug_fops) == NULL) + return -ENOMEM; + + return 0; +} +device_initcall(irq_debugfs_init); +#endif /* CONFIG_VIRQ_DEBUG */ diff --git a/arch/c6x/kernel/module.c b/arch/c6x/kernel/module.c new file mode 100644 index 0000000..5fc03f1 --- /dev/null +++ b/arch/c6x/kernel/module.c @@ -0,0 +1,123 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2005, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Thomas Charleux (thomas.charleux@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#include <linux/moduleloader.h> +#include <linux/elf.h> +#include <linux/vmalloc.h> +#include <linux/kernel.h> + +static inline int fixup_pcr(u32 *ip, Elf32_Addr dest, u32 maskbits, int shift) +{ + u32 opcode; + long ep = (long)ip & ~31; + long delta = ((long)dest - ep) >> 2; + long mask = (1 << maskbits) - 1; + + if ((delta >> (maskbits - 1)) == 0 || + (delta >> (maskbits - 1)) == -1) { + opcode = *ip; + opcode &= ~(mask << shift); + opcode |= ((delta & mask) << shift); + *ip = opcode; + + pr_debug("REL PCR_S%d[%p] dest[%p] opcode[%08x]\n", + maskbits, ip, (void *)dest, opcode); + + return 0; + } + pr_err("PCR_S%d reloc %p -> %p out of range!\n", + maskbits, ip, (void *)dest); + + return -1; +} + +/* + * apply a RELA relocation + */ +int apply_relocate_add(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + Elf32_Rela *rel = (void *) sechdrs[relsec].sh_addr; + Elf_Sym *sym; + u32 *location, opcode; + unsigned int i; + Elf32_Addr v; + Elf_Addr offset = 0; + + pr_debug("Applying relocate section %u to %u with offset 0x%x\n", + relsec, sechdrs[relsec].sh_info, offset); + + 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 - offset; + + /* This is the symbol it is referring to. Note that all + undefined symbols have been resolved. */ + sym = (Elf_Sym *)sechdrs[symindex].sh_addr + + ELF32_R_SYM(rel[i].r_info); + + /* this is the adjustment to be made */ + v = sym->st_value + rel[i].r_addend; + + switch (ELF32_R_TYPE(rel[i].r_info)) { + case R_C6000_ABS32: + pr_debug("RELA ABS32: [%p] = 0x%x\n", location, v); + *location = v; + break; + case R_C6000_ABS16: + pr_debug("RELA ABS16: [%p] = 0x%x\n", location, v); + *(u16 *)location = v; + break; + case R_C6000_ABS8: + pr_debug("RELA ABS8: [%p] = 0x%x\n", location, v); + *(u8 *)location = v; + break; + case R_C6000_ABS_L16: + opcode = *location; + opcode &= ~0x7fff80; + opcode |= ((v & 0xffff) << 7); + pr_debug("RELA ABS_L16[%p] v[0x%x] opcode[0x%x]\n", + location, v, opcode); + *location = opcode; + break; + case R_C6000_ABS_H16: + opcode = *location; + opcode &= ~0x7fff80; + opcode |= ((v >> 9) & 0x7fff80); + pr_debug("RELA ABS_H16[%p] v[0x%x] opcode[0x%x]\n", + location, v, opcode); + *location = opcode; + break; + case R_C6000_PCR_S21: + if (fixup_pcr(location, v, 21, 7)) + return -ENOEXEC; + break; + case R_C6000_PCR_S12: + if (fixup_pcr(location, v, 12, 16)) + return -ENOEXEC; + break; + case R_C6000_PCR_S10: + if (fixup_pcr(location, v, 10, 13)) + return -ENOEXEC; + break; + default: + pr_err("module %s: Unknown RELA relocation: %u\n", + me->name, ELF32_R_TYPE(rel[i].r_info)); + return -ENOEXEC; + } + } + + return 0; +} diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c new file mode 100644 index 0000000..7ca8c41 --- /dev/null +++ b/arch/c6x/kernel/process.c @@ -0,0 +1,265 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#include <linux/module.h> +#include <linux/unistd.h> +#include <linux/ptrace.h> +#include <linux/init_task.h> +#include <linux/tick.h> +#include <linux/mqueue.h> +#include <linux/syscalls.h> +#include <linux/reboot.h> + +#include <asm/syscalls.h> + +/* hooks for board specific support */ +void (*c6x_restart)(void); +void (*c6x_halt)(void); + +extern asmlinkage void ret_from_fork(void); + +static struct signal_struct init_signals = INIT_SIGNALS(init_signals); +static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); + +/* + * Initial thread structure. + */ +union thread_union init_thread_union __init_task_data = { + INIT_THREAD_INFO(init_task) +}; + +/* + * Initial task structure. + */ +struct task_struct init_task = INIT_TASK(init_task); +EXPORT_SYMBOL(init_task); + +/* + * power off function, if any + */ +void (*pm_power_off)(void); +EXPORT_SYMBOL(pm_power_off); + +static void c6x_idle(void) +{ + unsigned long tmp; + + /* + * Put local_irq_enable and idle in same execute packet + * to make them atomic and avoid race to idle with + * interrupts enabled. + */ + asm volatile (" mvc .s2 CSR,%0\n" + " or .d2 1,%0,%0\n" + " mvc .s2 %0,CSR\n" + "|| idle\n" + : "=b"(tmp)); +} + +/* + * The idle loop for C64x + */ +void cpu_idle(void) +{ + /* endless idle loop with no priority at all */ + while (1) { + tick_nohz_idle_enter(); + rcu_idle_enter(); + while (1) { + local_irq_disable(); + if (need_resched()) { + local_irq_enable(); + break; + } + c6x_idle(); /* enables local irqs */ + } + rcu_idle_exit(); + tick_nohz_idle_exit(); + + preempt_enable_no_resched(); + schedule(); + preempt_disable(); + } +} + +static void halt_loop(void) +{ + printk(KERN_EMERG "System Halted, OK to turn off power\n"); + local_irq_disable(); + while (1) + asm volatile("idle\n"); +} + +void machine_restart(char *__unused) +{ + if (c6x_restart) + c6x_restart(); + halt_loop(); +} + +void machine_halt(void) +{ + if (c6x_halt) + c6x_halt(); + halt_loop(); +} + +void machine_power_off(void) +{ + if (pm_power_off) + pm_power_off(); + halt_loop(); +} + +static void kernel_thread_helper(int dummy, void *arg, int (*fn)(void *)) +{ + do_exit(fn(arg)); +} + +/* + * Create a kernel thread + */ +int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) +{ + struct pt_regs regs; + + /* + * copy_thread sets a4 to zero (child return from fork) + * so we can't just set things up to directly return to + * fn. + */ + memset(®s, 0, sizeof(regs)); + regs.b4 = (unsigned long) arg; + regs.a6 = (unsigned long) fn; + regs.pc = (unsigned long) kernel_thread_helper; + local_save_flags(regs.csr); + regs.csr |= 1; + regs.tsr = 5; /* Set GEE and GIE in TSR */ + + /* Ok, create the new process.. */ + return do_fork(flags | CLONE_VM | CLONE_UNTRACED, -1, ®s, + 0, NULL, NULL); +} +EXPORT_SYMBOL(kernel_thread); + +void flush_thread(void) +{ +} + +void exit_thread(void) +{ +} + +SYSCALL_DEFINE1(c6x_clone, struct pt_regs *, regs) +{ + unsigned long clone_flags; + unsigned long newsp; + + /* syscall puts clone_flags in A4 and usp in B4 */ + clone_flags = regs->orig_a4; + if (regs->b4) + newsp = regs->b4; + else + newsp = regs->sp; + + return do_fork(clone_flags, newsp, regs, 0, (int __user *)regs->a6, + (int __user *)regs->b6); +} + +/* + * Do necessary setup to start up a newly executed thread. + */ +void start_thread(struct pt_regs *regs, unsigned int pc, unsigned long usp) +{ + /* + * The binfmt loader will setup a "full" stack, but the C6X + * operates an "empty" stack. So we adjust the usp so that + * argc doesn't get destroyed if an interrupt is taken before + * it is read from the stack. + * + * NB: Library startup code needs to match this. + */ + usp -= 8; + + set_fs(USER_DS); + regs->pc = pc; + regs->sp = usp; + regs->tsr |= 0x40; /* set user mode */ + current->thread.usp = usp; +} + +/* + * Copy a new thread context in its stack. + */ +int copy_thread(unsigned long clone_flags, unsigned long usp, + unsigned long ustk_size, + struct task_struct *p, struct pt_regs *regs) +{ + struct pt_regs *childregs; + + childregs = task_pt_regs(p); + + *childregs = *regs; + childregs->a4 = 0; + + if (usp == -1) + /* case of __kernel_thread: we return to supervisor space */ + childregs->sp = (unsigned long)(childregs + 1); + else + /* Otherwise use the given stack */ + childregs->sp = usp; + + /* Set usp/ksp */ + p->thread.usp = childregs->sp; + /* switch_to uses stack to save/restore 14 callee-saved regs */ + thread_saved_ksp(p) = (unsigned long)childregs - 8; + p->thread.pc = (unsigned int) ret_from_fork; + p->thread.wchan = (unsigned long) ret_from_fork; +#ifdef __DSBT__ + { + unsigned long dp; + + asm volatile ("mv .S2 b14,%0\n" : "=b"(dp)); + + thread_saved_dp(p) = dp; + if (usp == -1) + childregs->dp = dp; + } +#endif + return 0; +} + +/* + * c6x_execve() executes a new program. + */ +SYSCALL_DEFINE4(c6x_execve, const char __user *, name, + const char __user *const __user *, argv, + const char __user *const __user *, envp, + struct pt_regs *, regs) +{ + int error; + char *filename; + + filename = getname(name); + error = PTR_ERR(filename); + if (IS_ERR(filename)) + goto out; + + error = do_execve(filename, argv, envp, regs); + putname(filename); +out: + return error; +} + +unsigned long get_wchan(struct task_struct *p) +{ + return p->thread.wchan; +} diff --git a/arch/c6x/kernel/ptrace.c b/arch/c6x/kernel/ptrace.c new file mode 100644 index 0000000..3c494e8 --- /dev/null +++ b/arch/c6x/kernel/ptrace.c @@ -0,0 +1,187 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * Updated for 2.6.34: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/ptrace.h> +#include <linux/tracehook.h> +#include <linux/regset.h> +#include <linux/elf.h> + +#include <asm/cacheflush.h> + +#define PT_REG_SIZE (sizeof(struct pt_regs)) + +/* + * Called by kernel/ptrace.c when detaching. + */ +void ptrace_disable(struct task_struct *child) +{ + /* nothing to do */ +} + +/* + * Get a register number from live pt_regs for the specified task. + */ +static inline long get_reg(struct task_struct *task, int regno) +{ + long *addr = (long *)task_pt_regs(task); + + if (regno == PT_TSR || regno == PT_CSR) + return 0; + + return addr[regno]; +} + +/* + * Write contents of register REGNO in task TASK. + */ +static inline int put_reg(struct task_struct *task, + int regno, + unsigned long data) +{ + unsigned long *addr = (unsigned long *)task_pt_regs(task); + + if (regno != PT_TSR && regno != PT_CSR) + addr[regno] = data; + + return 0; +} + +/* regset get/set implementations */ + +static int gpr_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + struct pt_regs *regs = task_pt_regs(target); + + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, + regs, + 0, sizeof(*regs)); +} + +static int gpr_set(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user *ubuf) +{ + int ret; + struct pt_regs *regs = task_pt_regs(target); + + /* Don't copyin TSR or CSR */ + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + ®s, + 0, PT_TSR * sizeof(long)); + if (ret) + return ret; + + ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, + PT_TSR * sizeof(long), + (PT_TSR + 1) * sizeof(long)); + if (ret) + return ret; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + ®s, + (PT_TSR + 1) * sizeof(long), + PT_CSR * sizeof(long)); + if (ret) + return ret; + + ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, + PT_CSR * sizeof(long), + (PT_CSR + 1) * sizeof(long)); + if (ret) + return ret; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + ®s, + (PT_CSR + 1) * sizeof(long), -1); + return ret; +} + +enum c6x_regset { + REGSET_GPR, +}; + +static const struct user_regset c6x_regsets[] = { + [REGSET_GPR] = { + .core_note_type = NT_PRSTATUS, + .n = ELF_NGREG, + .size = sizeof(u32), + .align = sizeof(u32), + .get = gpr_get, + .set = gpr_set + }, +}; + +static const struct user_regset_view user_c6x_native_view = { + .name = "tic6x", + .e_machine = EM_TI_C6000, + .regsets = c6x_regsets, + .n = ARRAY_SIZE(c6x_regsets), +}; + +const struct user_regset_view *task_user_regset_view(struct task_struct *task) +{ + return &user_c6x_native_view; +} + +/* + * Perform ptrace request + */ +long arch_ptrace(struct task_struct *child, long request, + unsigned long addr, unsigned long data) +{ + int ret = 0; + + switch (request) { + /* + * write the word at location addr. + */ + case PTRACE_POKETEXT: + ret = generic_ptrace_pokedata(child, addr, data); + if (ret == 0 && request == PTRACE_POKETEXT) + flush_icache_range(addr, addr + 4); + break; + default: + ret = ptrace_request(child, request, addr, data); + break; + } + + return ret; +} + +/* + * handle tracing of system call entry + * - return the revised system call number or ULONG_MAX to cause ENOSYS + */ +asmlinkage unsigned long syscall_trace_entry(struct pt_regs *regs) +{ + if (tracehook_report_syscall_entry(regs)) + /* tracing decided this syscall should not happen, so + * We'll return a bogus call number to get an ENOSYS + * error, but leave the original number in + * regs->orig_a4 + */ + return ULONG_MAX; + + return regs->b0; +} + +/* + * handle tracing of system call exit + */ +asmlinkage void syscall_trace_exit(struct pt_regs *regs) +{ + tracehook_report_syscall_exit(regs, 0); +} diff --git a/arch/c6x/kernel/setup.c b/arch/c6x/kernel/setup.c new file mode 100644 index 0000000..0c07921 --- /dev/null +++ b/arch/c6x/kernel/setup.c @@ -0,0 +1,510 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/dma-mapping.h> +#include <linux/memblock.h> +#include <linux/seq_file.h> +#include <linux/bootmem.h> +#include <linux/clkdev.h> +#include <linux/initrd.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_fdt.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/cache.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <linux/clk.h> +#include <linux/cpu.h> +#include <linux/fs.h> +#include <linux/of.h> + + +#include <asm/sections.h> +#include <asm/div64.h> +#include <asm/setup.h> +#include <asm/dscr.h> +#include <asm/clock.h> +#include <asm/soc.h> + +static const char *c6x_soc_name; + +int c6x_num_cores; +EXPORT_SYMBOL_GPL(c6x_num_cores); + +unsigned int c6x_silicon_rev; +EXPORT_SYMBOL_GPL(c6x_silicon_rev); + +/* + * Device status register. This holds information + * about device configuration needed by some drivers. + */ +unsigned int c6x_devstat; +EXPORT_SYMBOL_GPL(c6x_devstat); + +/* + * Some SoCs have fuse registers holding a unique MAC + * address. This is parsed out of the device tree with + * the resulting MAC being held here. + */ +unsigned char c6x_fuse_mac[6]; + +unsigned long memory_start; +unsigned long memory_end; + +unsigned long ram_start; +unsigned long ram_end; + +/* Uncached memory for DMA consistent use (memdma=) */ +static unsigned long dma_start __initdata; +static unsigned long dma_size __initdata; + +char c6x_command_line[COMMAND_LINE_SIZE]; + +#if defined(CONFIG_CMDLINE_BOOL) +static const char default_command_line[COMMAND_LINE_SIZE] __section(.cmdline) = + CONFIG_CMDLINE; +#endif + +struct cpuinfo_c6x { + const char *cpu_name; + const char *cpu_voltage; + const char *mmu; + const char *fpu; + char *cpu_rev; + unsigned int core_id; + char __cpu_rev[5]; +}; + +static DEFINE_PER_CPU(struct cpuinfo_c6x, cpu_data); + +unsigned int ticks_per_ns_scaled; +EXPORT_SYMBOL(ticks_per_ns_scaled); + +unsigned int c6x_core_freq; + +static void __init get_cpuinfo(void) +{ + unsigned cpu_id, rev_id, csr; + struct clk *coreclk = clk_get_sys(NULL, "core"); + unsigned long core_khz; + u64 tmp; + struct cpuinfo_c6x *p; + struct device_node *node, *np; + + p = &per_cpu(cpu_data, smp_processor_id()); + + if (!IS_ERR(coreclk)) + c6x_core_freq = clk_get_rate(coreclk); + else { + printk(KERN_WARNING + "Cannot find core clock frequency. Using 700MHz\n"); + c6x_core_freq = 700000000; + } + + core_khz = c6x_core_freq / 1000; + + tmp = (uint64_t)core_khz << C6X_NDELAY_SCALE; + do_div(tmp, 1000000); + ticks_per_ns_scaled = tmp; + + csr = get_creg(CSR); + cpu_id = csr >> 24; + rev_id = (csr >> 16) & 0xff; + + p->mmu = "none"; + p->fpu = "none"; + p->cpu_voltage = "unknown"; + + switch (cpu_id) { + case 0: + p->cpu_name = "C67x"; + p->fpu = "yes"; + break; + case 2: + p->cpu_name = "C62x"; + break; + case 8: + p->cpu_name = "C64x"; + break; + case 12: + p->cpu_name = "C64x"; + break; + case 16: + p->cpu_name = "C64x+"; + p->cpu_voltage = "1.2"; + break; + default: + p->cpu_name = "unknown"; + break; + } + + if (cpu_id < 16) { + switch (rev_id) { + case 0x1: + if (cpu_id > 8) { + p->cpu_rev = "DM640/DM641/DM642/DM643"; + p->cpu_voltage = "1.2 - 1.4"; + } else { + p->cpu_rev = "C6201"; + p->cpu_voltage = "2.5"; + } + break; + case 0x2: + p->cpu_rev = "C6201B/C6202/C6211"; + p->cpu_voltage = "1.8"; + break; + case 0x3: + p->cpu_rev = "C6202B/C6203/C6204/C6205"; + p->cpu_voltage = "1.5"; + break; + case 0x201: + p->cpu_rev = "C6701 revision 0 (early CPU)"; + p->cpu_voltage = "1.8"; + break; + case 0x202: + p->cpu_rev = "C6701/C6711/C6712"; + p->cpu_voltage = "1.8"; + break; + case 0x801: + p->cpu_rev = "C64x"; + p->cpu_voltage = "1.5"; + break; + default: + p->cpu_rev = "unknown"; + } + } else { + p->cpu_rev = p->__cpu_rev; + snprintf(p->__cpu_rev, sizeof(p->__cpu_rev), "0x%x", cpu_id); + } + + p->core_id = get_coreid(); + + node = of_find_node_by_name(NULL, "cpus"); + if (node) { + for_each_child_of_node(node, np) + if (!strcmp("cpu", np->name)) + ++c6x_num_cores; + of_node_put(node); + } + + node = of_find_node_by_name(NULL, "soc"); + if (node) { + if (of_property_read_string(node, "model", &c6x_soc_name)) + c6x_soc_name = "unknown"; + of_node_put(node); + } else + c6x_soc_name = "unknown"; + + printk(KERN_INFO "CPU%d: %s rev %s, %s volts, %uMHz\n", + p->core_id, p->cpu_name, p->cpu_rev, + p->cpu_voltage, c6x_core_freq / 1000000); +} + +/* + * Early parsing of the command line + */ +static u32 mem_size __initdata; + +/* "mem=" parsing. */ +static int __init early_mem(char *p) +{ + if (!p) + return -EINVAL; + + mem_size = memparse(p, &p); + /* don't remove all of memory when handling "mem={invalid}" */ + if (mem_size == 0) + return -EINVAL; + + return 0; +} +early_param("mem", early_mem); + +/* "memdma=<size>[@<address>]" parsing. */ +static int __init early_memdma(char *p) +{ + if (!p) + return -EINVAL; + + dma_size = memparse(p, &p); + if (*p == '@') + dma_start = memparse(p, &p); + + return 0; +} +early_param("memdma", early_memdma); + +int __init c6x_add_memory(phys_addr_t start, unsigned long size) +{ + static int ram_found __initdata; + + /* We only handle one bank (the one with PAGE_OFFSET) for now */ + if (ram_found) + return -EINVAL; + + if (start > PAGE_OFFSET || PAGE_OFFSET >= (start + size)) + return 0; + + ram_start = start; + ram_end = start + size; + + ram_found = 1; + return 0; +} + +/* + * Do early machine setup and device tree parsing. This is called very + * early on the boot process. + */ +notrace void __init machine_init(unsigned long dt_ptr) +{ + struct boot_param_header *dtb = __va(dt_ptr); + struct boot_param_header *fdt = (struct boot_param_header *)_fdt_start; + + /* interrupts must be masked */ + set_creg(IER, 2); + + /* + * Set the Interrupt Service Table (IST) to the beginning of the + * vector table. + */ + set_ist(_vectors_start); + + lockdep_init(); + + /* + * dtb is passed in from bootloader. + * fdt is linked in blob. + */ + if (dtb && dtb != fdt) + fdt = dtb; + + /* Do some early initialization based on the flat device tree */ + early_init_devtree(fdt); + + /* parse_early_param needs a boot_command_line */ + strlcpy(boot_command_line, c6x_command_line, COMMAND_LINE_SIZE); + parse_early_param(); +} + +void __init setup_arch(char **cmdline_p) +{ + int bootmap_size; + struct memblock_region *reg; + + printk(KERN_INFO "Initializing kernel\n"); + + /* Initialize command line */ + *cmdline_p = c6x_command_line; + + memory_end = ram_end; + memory_end &= ~(PAGE_SIZE - 1); + + if (mem_size && (PAGE_OFFSET + PAGE_ALIGN(mem_size)) < memory_end) + memory_end = PAGE_OFFSET + PAGE_ALIGN(mem_size); + + /* add block that this kernel can use */ + memblock_add(PAGE_OFFSET, memory_end - PAGE_OFFSET); + + /* reserve kernel text/data/bss */ + memblock_reserve(PAGE_OFFSET, + PAGE_ALIGN((unsigned long)&_end - PAGE_OFFSET)); + + if (dma_size) { + /* align to cacheability granularity */ + dma_size = CACHE_REGION_END(dma_size); + + if (!dma_start) + dma_start = memory_end - dma_size; + + /* align to cacheability granularity */ + dma_start = CACHE_REGION_START(dma_start); + + /* reserve DMA memory taken from kernel memory */ + if (memblock_is_region_memory(dma_start, dma_size)) + memblock_reserve(dma_start, dma_size); + } + + memory_start = PAGE_ALIGN((unsigned int) &_end); + + printk(KERN_INFO "Memory Start=%08lx, Memory End=%08lx\n", + memory_start, memory_end); + +#ifdef CONFIG_BLK_DEV_INITRD + /* + * Reserve initrd memory if in kernel memory. + */ + if (initrd_start < initrd_end) + if (memblock_is_region_memory(initrd_start, + initrd_end - initrd_start)) + memblock_reserve(initrd_start, + initrd_end - initrd_start); +#endif + + init_mm.start_code = (unsigned long) &_stext; + init_mm.end_code = (unsigned long) &_etext; + init_mm.end_data = memory_start; + init_mm.brk = memory_start; + + /* + * Give all the memory to the bootmap allocator, tell it to put the + * boot mem_map at the start of memory + */ + bootmap_size = init_bootmem_node(NODE_DATA(0), + memory_start >> PAGE_SHIFT, + PAGE_OFFSET >> PAGE_SHIFT, + memory_end >> PAGE_SHIFT); + memblock_reserve(memory_start, bootmap_size); + + unflatten_device_tree(); + + c6x_cache_init(); + + /* Set the whole external memory as non-cacheable */ + disable_caching(ram_start, ram_end - 1); + + /* Set caching of external RAM used by Linux */ + for_each_memblock(memory, reg) + enable_caching(CACHE_REGION_START(reg->base), + CACHE_REGION_START(reg->base + reg->size - 1)); + +#ifdef CONFIG_BLK_DEV_INITRD + /* + * Enable caching for initrd which falls outside kernel memory. + */ + if (initrd_start < initrd_end) { + if (!memblock_is_region_memory(initrd_start, + initrd_end - initrd_start)) + enable_caching(CACHE_REGION_START(initrd_start), + CACHE_REGION_START(initrd_end - 1)); + } +#endif + + /* + * Disable caching for dma coherent memory taken from kernel memory. + */ + if (dma_size && memblock_is_region_memory(dma_start, dma_size)) + disable_caching(dma_start, + CACHE_REGION_START(dma_start + dma_size - 1)); + + /* Initialize the coherent memory allocator */ + coherent_mem_init(dma_start, dma_size); + + /* + * Free all memory as a starting point. + */ + free_bootmem(PAGE_OFFSET, memory_end - PAGE_OFFSET); + + /* + * Then reserve memory which is already being used. + */ + for_each_memblock(reserved, reg) { + pr_debug("reserved - 0x%08x-0x%08x\n", + (u32) reg->base, (u32) reg->size); + reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); + } + + max_low_pfn = PFN_DOWN(memory_end); + min_low_pfn = PFN_UP(memory_start); + max_mapnr = max_low_pfn - min_low_pfn; + + /* Get kmalloc into gear */ + paging_init(); + + /* + * Probe for Device State Configuration Registers. + * We have to do this early in case timer needs to be enabled + * through DSCR. + */ + dscr_probe(); + + /* We do this early for timer and core clock frequency */ + c64x_setup_clocks(); + + /* Get CPU info */ + get_cpuinfo(); + +#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE) + conswitchp = &dummy_con; +#endif +} + +#define cpu_to_ptr(n) ((void *)((long)(n)+1)) +#define ptr_to_cpu(p) ((long)(p) - 1) + +static int show_cpuinfo(struct seq_file *m, void *v) +{ + int n = ptr_to_cpu(v); + struct cpuinfo_c6x *p = &per_cpu(cpu_data, n); + + if (n == 0) { + seq_printf(m, + "soc\t\t: %s\n" + "soc revision\t: 0x%x\n" + "soc cores\t: %d\n", + c6x_soc_name, c6x_silicon_rev, c6x_num_cores); + } + + seq_printf(m, + "\n" + "processor\t: %d\n" + "cpu\t\t: %s\n" + "core revision\t: %s\n" + "core voltage\t: %s\n" + "core id\t\t: %d\n" + "mmu\t\t: %s\n" + "fpu\t\t: %s\n" + "cpu MHz\t\t: %u\n" + "bogomips\t: %lu.%02lu\n\n", + n, + p->cpu_name, p->cpu_rev, p->cpu_voltage, + p->core_id, p->mmu, p->fpu, + (c6x_core_freq + 500000) / 1000000, + (loops_per_jiffy/(500000/HZ)), + (loops_per_jiffy/(5000/HZ))%100); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + return *pos < nr_cpu_ids ? cpu_to_ptr(*pos) : NULL; +} +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + ++*pos; + return NULL; +} +static void c_stop(struct seq_file *m, void *v) +{ +} + +const struct seq_operations cpuinfo_op = { + c_start, + c_stop, + c_next, + show_cpuinfo +}; + +static struct cpu cpu_devices[NR_CPUS]; + +static int __init topology_init(void) +{ + int i; + + for_each_present_cpu(i) + register_cpu(&cpu_devices[i], i); + + return 0; +} + +subsys_initcall(topology_init); diff --git a/arch/c6x/kernel/signal.c b/arch/c6x/kernel/signal.c new file mode 100644 index 0000000..304f675 --- /dev/null +++ b/arch/c6x/kernel/signal.c @@ -0,0 +1,377 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * Updated for 2.6.34: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/uaccess.h> +#include <linux/syscalls.h> +#include <linux/tracehook.h> + +#include <asm/ucontext.h> +#include <asm/cacheflush.h> + + +#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) + +/* + * Do a signal return, undo the signal stack. + */ + +#define RETCODE_SIZE (9 << 2) /* 9 instructions = 36 bytes */ + +struct rt_sigframe { + struct siginfo __user *pinfo; + void __user *puc; + struct siginfo info; + struct ucontext uc; + unsigned long retcode[RETCODE_SIZE >> 2]; +}; + +static int restore_sigcontext(struct pt_regs *regs, + struct sigcontext __user *sc) +{ + int err = 0; + + /* The access_ok check was done by caller, so use __get_user here */ +#define COPY(x) (err |= __get_user(regs->x, &sc->sc_##x)) + + COPY(sp); COPY(a4); COPY(b4); COPY(a6); COPY(b6); COPY(a8); COPY(b8); + COPY(a0); COPY(a1); COPY(a2); COPY(a3); COPY(a5); COPY(a7); COPY(a9); + COPY(b0); COPY(b1); COPY(b2); COPY(b3); COPY(b5); COPY(b7); COPY(b9); + + COPY(a16); COPY(a17); COPY(a18); COPY(a19); + COPY(a20); COPY(a21); COPY(a22); COPY(a23); + COPY(a24); COPY(a25); COPY(a26); COPY(a27); + COPY(a28); COPY(a29); COPY(a30); COPY(a31); + COPY(b16); COPY(b17); COPY(b18); COPY(b19); + COPY(b20); COPY(b21); COPY(b22); COPY(b23); + COPY(b24); COPY(b25); COPY(b26); COPY(b27); + COPY(b28); COPY(b29); COPY(b30); COPY(b31); + + COPY(csr); COPY(pc); + +#undef COPY + + return err; +} + +asmlinkage int do_rt_sigreturn(struct pt_regs *regs) +{ + struct rt_sigframe __user *frame; + sigset_t set; + + /* + * Since we stacked the signal on a dword boundary, + * 'sp' should be dword aligned here. If it's + * not, then the user is trying to mess with us. + */ + if (regs->sp & 7) + goto badframe; + + frame = (struct rt_sigframe __user *) ((unsigned long) regs->sp + 8); + + 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)) + goto badframe; + + return regs->a4; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +static int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, + unsigned long mask) +{ + int err = 0; + + err |= __put_user(mask, &sc->sc_mask); + + /* The access_ok check was done by caller, so use __put_user here */ +#define COPY(x) (err |= __put_user(regs->x, &sc->sc_##x)) + + COPY(sp); COPY(a4); COPY(b4); COPY(a6); COPY(b6); COPY(a8); COPY(b8); + COPY(a0); COPY(a1); COPY(a2); COPY(a3); COPY(a5); COPY(a7); COPY(a9); + COPY(b0); COPY(b1); COPY(b2); COPY(b3); COPY(b5); COPY(b7); COPY(b9); + + COPY(a16); COPY(a17); COPY(a18); COPY(a19); + COPY(a20); COPY(a21); COPY(a22); COPY(a23); + COPY(a24); COPY(a25); COPY(a26); COPY(a27); + COPY(a28); COPY(a29); COPY(a30); COPY(a31); + COPY(b16); COPY(b17); COPY(b18); COPY(b19); + COPY(b20); COPY(b21); COPY(b22); COPY(b23); + COPY(b24); COPY(b25); COPY(b26); COPY(b27); + COPY(b28); COPY(b29); COPY(b30); COPY(b31); + + COPY(csr); COPY(pc); + +#undef COPY + + return err; +} + +static inline void __user *get_sigframe(struct k_sigaction *ka, + struct pt_regs *regs, + unsigned long framesize) +{ + unsigned long sp = regs->sp; + + /* + * This is the X/Open sanctioned signal stack switching. + */ + if ((ka->sa.sa_flags & SA_ONSTACK) && sas_ss_flags(sp) == 0) + sp = current->sas_ss_sp + current->sas_ss_size; + + /* + * No matter what happens, 'sp' must be dword + * aligned. Otherwise, nasty things will happen + */ + return (void __user *)((sp - framesize) & ~7); +} + +static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info, + sigset_t *set, struct pt_regs *regs) +{ + struct rt_sigframe __user *frame; + unsigned long __user *retcode; + int err = 0; + + frame = get_sigframe(ka, regs, sizeof(*frame)); + + if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) + goto segv_and_exit; + + err |= __put_user(&frame->info, &frame->pinfo); + err |= __put_user(&frame->uc, &frame->puc); + err |= copy_siginfo_to_user(&frame->info, info); + + /* Clear all the bits of the ucontext we don't use. */ + err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext)); + + err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]); + err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); + + /* Set up to return from userspace */ + retcode = (unsigned long __user *) &frame->retcode; + + /* The access_ok check was done above, so use __put_user here */ +#define COPY(x) (err |= __put_user(x, retcode++)) + + COPY(0x0000002AUL | (__NR_rt_sigreturn << 7)); + /* MVK __NR_rt_sigreturn,B0 */ + COPY(0x10000000UL); /* SWE */ + COPY(0x00006000UL); /* NOP 4 */ + COPY(0x00006000UL); /* NOP 4 */ + COPY(0x00006000UL); /* NOP 4 */ + COPY(0x00006000UL); /* NOP 4 */ + COPY(0x00006000UL); /* NOP 4 */ + COPY(0x00006000UL); /* NOP 4 */ + COPY(0x00006000UL); /* NOP 4 */ + +#undef COPY + + if (err) + goto segv_and_exit; + + flush_icache_range((unsigned long) &frame->retcode, + (unsigned long) &frame->retcode + RETCODE_SIZE); + + retcode = (unsigned long __user *) &frame->retcode; + + /* Change user context to branch to signal handler */ + regs->sp = (unsigned long) frame - 8; + regs->b3 = (unsigned long) retcode; + regs->pc = (unsigned long) ka->sa.sa_handler; + + /* Give the signal number to the handler */ + regs->a4 = signr; + + /* + * For realtime signals we must also set the second and third + * arguments for the signal handler. + * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06 + */ + regs->b4 = (unsigned long)&frame->info; + regs->a6 = (unsigned long)&frame->uc; + + return 0; + +segv_and_exit: + force_sigsegv(signr, current); + return -EFAULT; +} + +static inline void +handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) +{ + switch (regs->a4) { + case -ERESTARTNOHAND: + if (!has_handler) + goto do_restart; + regs->a4 = -EINTR; + break; + + case -ERESTARTSYS: + if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) { + regs->a4 = -EINTR; + break; + } + /* fallthrough */ + case -ERESTARTNOINTR: +do_restart: + regs->a4 = regs->orig_a4; + regs->pc -= 4; + break; + } +} + +/* + * handle the actual delivery of a signal to userspace + */ +static int handle_signal(int sig, + siginfo_t *info, struct k_sigaction *ka, + sigset_t *oldset, struct pt_regs *regs, + int syscall) +{ + int ret; + + /* Are we from a system call? */ + if (syscall) { + /* If so, check system call restarting.. */ + switch (regs->a4) { + case -ERESTART_RESTARTBLOCK: + case -ERESTARTNOHAND: + regs->a4 = -EINTR; + break; + + case -ERESTARTSYS: + if (!(ka->sa.sa_flags & SA_RESTART)) { + regs->a4 = -EINTR; + break; + } + + /* fallthrough */ + case -ERESTARTNOINTR: + regs->a4 = regs->orig_a4; + regs->pc -= 4; + } + } + + /* Set up the stack frame */ + ret = setup_rt_frame(sig, ka, info, oldset, regs); + if (ret == 0) { + spin_lock_irq(¤t->sighand->siglock); + sigorsets(¤t->blocked, ¤t->blocked, + &ka->sa.sa_mask); + if (!(ka->sa.sa_flags & SA_NODEFER)) + sigaddset(¤t->blocked, sig); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + } + + return ret; +} + +/* + * handle a potential signal + */ +static void do_signal(struct pt_regs *regs, int syscall) +{ + struct k_sigaction ka; + siginfo_t info; + sigset_t *oldset; + int signr; + + /* we want the common case to go fast, which is why we may in certain + * cases get here from kernel mode */ + if (!user_mode(regs)) + return; + + if (test_thread_flag(TIF_RESTORE_SIGMASK)) + oldset = ¤t->saved_sigmask; + else + oldset = ¤t->blocked; + + signr = get_signal_to_deliver(&info, &ka, regs, NULL); + if (signr > 0) { + if (handle_signal(signr, &info, &ka, oldset, + regs, syscall) == 0) { + /* a signal was successfully delivered; the saved + * sigmask will have been stored in the signal frame, + * and will be restored by sigreturn, so we can simply + * clear the TIF_RESTORE_SIGMASK flag */ + if (test_thread_flag(TIF_RESTORE_SIGMASK)) + clear_thread_flag(TIF_RESTORE_SIGMASK); + + tracehook_signal_handler(signr, &info, &ka, regs, 0); + } + + return; + } + + /* did we come from a system call? */ + if (syscall) { + /* restart the system call - no handlers present */ + switch (regs->a4) { + case -ERESTARTNOHAND: + case -ERESTARTSYS: + case -ERESTARTNOINTR: + regs->a4 = regs->orig_a4; + regs->pc -= 4; + break; + + case -ERESTART_RESTARTBLOCK: + regs->a4 = regs->orig_a4; + regs->b0 = __NR_restart_syscall; + regs->pc -= 4; + break; + } + } + + /* if there's no signal to deliver, we just put the saved sigmask + * back */ + if (test_thread_flag(TIF_RESTORE_SIGMASK)) { + clear_thread_flag(TIF_RESTORE_SIGMASK); + sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); + } +} + +/* + * notification of userspace execution resumption + * - triggered by current->work.notify_resume + */ +asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags, + int syscall) +{ + /* deal with pending signal delivery */ + if (thread_info_flags & ((1 << TIF_SIGPENDING) | + (1 << TIF_RESTORE_SIGMASK))) + do_signal(regs, syscall); + + if (thread_info_flags & (1 << TIF_NOTIFY_RESUME)) { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + if (current->replacement_session_keyring) + key_replace_session_keyring(); + } +} diff --git a/arch/c6x/kernel/soc.c b/arch/c6x/kernel/soc.c new file mode 100644 index 0000000..dd45bc3 --- /dev/null +++ b/arch/c6x/kernel/soc.c @@ -0,0 +1,91 @@ +/* + * Miscellaneous SoC-specific hooks. + * + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/ctype.h> +#include <linux/etherdevice.h> +#include <asm/system.h> +#include <asm/setup.h> +#include <asm/soc.h> + +struct soc_ops soc_ops; + +int soc_get_exception(void) +{ + if (!soc_ops.get_exception) + return -1; + return soc_ops.get_exception(); +} + +void soc_assert_event(unsigned int evt) +{ + if (soc_ops.assert_event) + soc_ops.assert_event(evt); +} + +static u8 cmdline_mac[6]; + +static int __init get_mac_addr_from_cmdline(char *str) +{ + int count, i, val; + + for (count = 0; count < 6 && *str; count++, str += 3) { + if (!isxdigit(str[0]) || !isxdigit(str[1])) + return 0; + if (str[2] != ((count < 5) ? ':' : '\0')) + return 0; + + for (i = 0, val = 0; i < 2; i++) { + val = val << 4; + val |= isdigit(str[i]) ? + str[i] - '0' : toupper(str[i]) - 'A' + 10; + } + cmdline_mac[count] = val; + } + return 1; +} +__setup("emac_addr=", get_mac_addr_from_cmdline); + +/* + * Setup the MAC address for SoC ethernet devices. + * + * Before calling this function, the ethernet driver will have + * initialized the addr with local-mac-address from the device + * tree (if found). Allow command line to override, but not + * the fused address. + */ +int soc_mac_addr(unsigned int index, u8 *addr) +{ + int i, have_dt_mac = 0, have_cmdline_mac = 0, have_fuse_mac = 0; + + for (i = 0; i < 6; i++) { + if (cmdline_mac[i]) + have_cmdline_mac = 1; + if (c6x_fuse_mac[i]) + have_fuse_mac = 1; + if (addr[i]) + have_dt_mac = 1; + } + + /* cmdline overrides all */ + if (have_cmdline_mac) + memcpy(addr, cmdline_mac, 6); + else if (!have_dt_mac) { + if (have_fuse_mac) + memcpy(addr, c6x_fuse_mac, 6); + else + random_ether_addr(addr); + } + + /* adjust for specific EMAC device */ + addr[5] += index * c6x_num_cores; + return 1; +} +EXPORT_SYMBOL_GPL(soc_mac_addr); diff --git a/arch/c6x/kernel/switch_to.S b/arch/c6x/kernel/switch_to.S new file mode 100644 index 0000000..09177ed --- /dev/null +++ b/arch/c6x/kernel/switch_to.S @@ -0,0 +1,74 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter (msalter@redhat.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/linkage.h> +#include <asm/asm-offsets.h> + +#define SP B15 + + /* + * void __switch_to(struct thread_info *prev, + * struct thread_info *next, + * struct task_struct *tsk) ; + */ +ENTRY(__switch_to) + LDDW .D2T2 *+B4(THREAD_B15_14),B7:B6 + || MV .L2X A4,B5 ; prev + || MV .L1X B4,A5 ; next + || MVC .S2 RILC,B1 + + STW .D2T2 B3,*+B5(THREAD_PC) + || STDW .D1T1 A13:A12,*+A4(THREAD_A13_12) + || MVC .S2 ILC,B0 + + LDW .D2T2 *+B4(THREAD_PC),B3 + || LDDW .D1T1 *+A5(THREAD_A13_12),A13:A12 + + STDW .D1T1 A11:A10,*+A4(THREAD_A11_10) + || STDW .D2T2 B1:B0,*+B5(THREAD_RICL_ICL) +#ifndef __DSBT__ + || MVKL .S2 current_ksp,B1 +#endif + + STDW .D2T2 B15:B14,*+B5(THREAD_B15_14) + || STDW .D1T1 A15:A14,*+A4(THREAD_A15_14) +#ifndef __DSBT__ + || MVKH .S2 current_ksp,B1 +#endif + + ;; Switch to next SP + MV .S2 B7,SP +#ifdef __DSBT__ + || STW .D2T2 B7,*+B14(current_ksp) +#else + || STW .D2T2 B7,*B1 + || MV .L2 B6,B14 +#endif + || LDDW .D1T1 *+A5(THREAD_RICL_ICL),A1:A0 + + STDW .D2T2 B11:B10,*+B5(THREAD_B11_10) + || LDDW .D1T1 *+A5(THREAD_A15_14),A15:A14 + + STDW .D2T2 B13:B12,*+B5(THREAD_B13_12) + || LDDW .D1T1 *+A5(THREAD_A11_10),A11:A10 + + B .S2 B3 ; return in next E1 + || LDDW .D2T2 *+B4(THREAD_B13_12),B13:B12 + + LDDW .D2T2 *+B4(THREAD_B11_10),B11:B10 + NOP + + MV .L2X A0,B0 + || MV .S1 A6,A4 + + MVC .S2 B0,ILC + || MV .L2X A1,B1 + + MVC .S2 B1,RILC +ENDPROC(__switch_to) diff --git a/arch/c6x/kernel/sys_c6x.c b/arch/c6x/kernel/sys_c6x.c new file mode 100644 index 0000000..3e9bdfb --- /dev/null +++ b/arch/c6x/kernel/sys_c6x.c @@ -0,0 +1,74 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/syscalls.h> +#include <linux/uaccess.h> + +#include <asm/syscalls.h> + +#ifdef CONFIG_ACCESS_CHECK +int _access_ok(unsigned long addr, unsigned long size) +{ + if (!size) + return 1; + + if (!addr || addr > (0xffffffffUL - (size - 1))) + goto _bad_access; + + if (segment_eq(get_fs(), KERNEL_DS)) + return 1; + + if (memory_start <= addr && (addr + size - 1) < memory_end) + return 1; + +_bad_access: + pr_debug("Bad access attempt: pid[%d] addr[%08lx] size[0x%lx]\n", + current->pid, addr, size); + return 0; +} +EXPORT_SYMBOL(_access_ok); +#endif + +/* sys_cache_sync -- sync caches over given range */ +asmlinkage int sys_cache_sync(unsigned long s, unsigned long e) +{ + L1D_cache_block_writeback_invalidate(s, e); + L1P_cache_block_invalidate(s, e); + + return 0; +} + +/* Provide the actual syscall number to call mapping. */ +#undef __SYSCALL +#define __SYSCALL(nr, call) [nr] = (call), + +/* + * Use trampolines + */ +#define sys_pread64 sys_pread_c6x +#define sys_pwrite64 sys_pwrite_c6x +#define sys_truncate64 sys_truncate64_c6x +#define sys_ftruncate64 sys_ftruncate64_c6x +#define sys_fadvise64 sys_fadvise64_c6x +#define sys_fadvise64_64 sys_fadvise64_64_c6x +#define sys_fallocate sys_fallocate_c6x + +/* Use sys_mmap_pgoff directly */ +#define sys_mmap2 sys_mmap_pgoff + +/* + * Note that we can't include <linux/unistd.h> here since the header + * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. + */ +void *sys_call_table[__NR_syscalls] = { + [0 ... __NR_syscalls-1] = sys_ni_syscall, +#include <asm/unistd.h> +}; diff --git a/arch/c6x/kernel/time.c b/arch/c6x/kernel/time.c new file mode 100644 index 0000000..4c9f136 --- /dev/null +++ b/arch/c6x/kernel/time.c @@ -0,0 +1,65 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/clocksource.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/param.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/timex.h> +#include <linux/profile.h> + +#include <asm/timer64.h> + +static u32 sched_clock_multiplier; +#define SCHED_CLOCK_SHIFT 16 + +static cycle_t tsc_read(struct clocksource *cs) +{ + return get_cycles(); +} + +static struct clocksource clocksource_tsc = { + .name = "timestamp", + .rating = 300, + .read = tsc_read, + .mask = CLOCKSOURCE_MASK(64), + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +/* + * scheduler clock - returns current time in nanoseconds. + */ +u64 sched_clock(void) +{ + u64 tsc = get_cycles(); + + return (tsc * sched_clock_multiplier) >> SCHED_CLOCK_SHIFT; +} + +void time_init(void) +{ + u64 tmp = (u64)NSEC_PER_SEC << SCHED_CLOCK_SHIFT; + + do_div(tmp, c6x_core_freq); + sched_clock_multiplier = tmp; + + clocksource_register_hz(&clocksource_tsc, c6x_core_freq); + + /* write anything into TSCL to enable counting */ + set_creg(TSCL, 0); + + /* probe for timer64 event timer */ + timer64_init(); +} diff --git a/arch/c6x/kernel/traps.c b/arch/c6x/kernel/traps.c new file mode 100644 index 0000000..f50e3ed --- /dev/null +++ b/arch/c6x/kernel/traps.c @@ -0,0 +1,423 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/ptrace.h> +#include <linux/kallsyms.h> +#include <linux/bug.h> + +#include <asm/soc.h> +#include <asm/traps.h> + +int (*c6x_nmi_handler)(struct pt_regs *regs); + +void __init trap_init(void) +{ + ack_exception(EXCEPT_TYPE_NXF); + ack_exception(EXCEPT_TYPE_EXC); + ack_exception(EXCEPT_TYPE_IXF); + ack_exception(EXCEPT_TYPE_SXF); + enable_exception(); +} + +void show_regs(struct pt_regs *regs) +{ + pr_err("\n"); + pr_err("PC: %08lx SP: %08lx\n", regs->pc, regs->sp); + pr_err("Status: %08lx ORIG_A4: %08lx\n", regs->csr, regs->orig_a4); + pr_err("A0: %08lx B0: %08lx\n", regs->a0, regs->b0); + pr_err("A1: %08lx B1: %08lx\n", regs->a1, regs->b1); + pr_err("A2: %08lx B2: %08lx\n", regs->a2, regs->b2); + pr_err("A3: %08lx B3: %08lx\n", regs->a3, regs->b3); + pr_err("A4: %08lx B4: %08lx\n", regs->a4, regs->b4); + pr_err("A5: %08lx B5: %08lx\n", regs->a5, regs->b5); + pr_err("A6: %08lx B6: %08lx\n", regs->a6, regs->b6); + pr_err("A7: %08lx B7: %08lx\n", regs->a7, regs->b7); + pr_err("A8: %08lx B8: %08lx\n", regs->a8, regs->b8); + pr_err("A9: %08lx B9: %08lx\n", regs->a9, regs->b9); + pr_err("A10: %08lx B10: %08lx\n", regs->a10, regs->b10); + pr_err("A11: %08lx B11: %08lx\n", regs->a11, regs->b11); + pr_err("A12: %08lx B12: %08lx\n", regs->a12, regs->b12); + pr_err("A13: %08lx B13: %08lx\n", regs->a13, regs->b13); + pr_err("A14: %08lx B14: %08lx\n", regs->a14, regs->dp); + pr_err("A15: %08lx B15: %08lx\n", regs->a15, regs->sp); + pr_err("A16: %08lx B16: %08lx\n", regs->a16, regs->b16); + pr_err("A17: %08lx B17: %08lx\n", regs->a17, regs->b17); + pr_err("A18: %08lx B18: %08lx\n", regs->a18, regs->b18); + pr_err("A19: %08lx B19: %08lx\n", regs->a19, regs->b19); + pr_err("A20: %08lx B20: %08lx\n", regs->a20, regs->b20); + pr_err("A21: %08lx B21: %08lx\n", regs->a21, regs->b21); + pr_err("A22: %08lx B22: %08lx\n", regs->a22, regs->b22); + pr_err("A23: %08lx B23: %08lx\n", regs->a23, regs->b23); + pr_err("A24: %08lx B24: %08lx\n", regs->a24, regs->b24); + pr_err("A25: %08lx B25: %08lx\n", regs->a25, regs->b25); + pr_err("A26: %08lx B26: %08lx\n", regs->a26, regs->b26); + pr_err("A27: %08lx B27: %08lx\n", regs->a27, regs->b27); + pr_err("A28: %08lx B28: %08lx\n", regs->a28, regs->b28); + pr_err("A29: %08lx B29: %08lx\n", regs->a29, regs->b29); + pr_err("A30: %08lx B30: %08lx\n", regs->a30, regs->b30); + pr_err("A31: %08lx B31: %08lx\n", regs->a31, regs->b31); +} + +void dump_stack(void) +{ + unsigned long stack; + + show_stack(current, &stack); +} +EXPORT_SYMBOL(dump_stack); + + +void die(char *str, struct pt_regs *fp, int nr) +{ + console_verbose(); + pr_err("%s: %08x\n", str, nr); + show_regs(fp); + + pr_err("Process %s (pid: %d, stackpage=%08lx)\n", + current->comm, current->pid, (PAGE_SIZE + + (unsigned long) current)); + + dump_stack(); + while (1) + ; +} + +static void die_if_kernel(char *str, struct pt_regs *fp, int nr) +{ + if (user_mode(fp)) + return; + + die(str, fp, nr); +} + + +/* Internal exceptions */ +static struct exception_info iexcept_table[10] = { + { "Oops - instruction fetch", SIGBUS, BUS_ADRERR }, + { "Oops - fetch packet", SIGBUS, BUS_ADRERR }, + { "Oops - execute packet", SIGILL, ILL_ILLOPC }, + { "Oops - undefined instruction", SIGILL, ILL_ILLOPC }, + { "Oops - resource conflict", SIGILL, ILL_ILLOPC }, + { "Oops - resource access", SIGILL, ILL_PRVREG }, + { "Oops - privilege", SIGILL, ILL_PRVOPC }, + { "Oops - loops buffer", SIGILL, ILL_ILLOPC }, + { "Oops - software exception", SIGILL, ILL_ILLTRP }, + { "Oops - unknown exception", SIGILL, ILL_ILLOPC } +}; + +/* External exceptions */ +static struct exception_info eexcept_table[128] = { + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - external exception", SIGBUS, BUS_ADRERR }, + { "Oops - CPU memory protection fault", SIGSEGV, SEGV_ACCERR }, + { "Oops - CPU memory protection fault in L1P", SIGSEGV, SEGV_ACCERR }, + { "Oops - DMA memory protection fault in L1P", SIGSEGV, SEGV_ACCERR }, + { "Oops - CPU memory protection fault in L1D", SIGSEGV, SEGV_ACCERR }, + { "Oops - DMA memory protection fault in L1D", SIGSEGV, SEGV_ACCERR }, + { "Oops - CPU memory protection fault in L2", SIGSEGV, SEGV_ACCERR }, + { "Oops - DMA memory protection fault in L2", SIGSEGV, SEGV_ACCERR }, + { "Oops - EMC CPU memory protection fault", SIGSEGV, SEGV_ACCERR }, + { "Oops - EMC bus error", SIGBUS, BUS_ADRERR } +}; + +static void do_trap(struct exception_info *except_info, struct pt_regs *regs) +{ + unsigned long addr = instruction_pointer(regs); + siginfo_t info; + + if (except_info->code != TRAP_BRKPT) + pr_err("TRAP: %s PC[0x%lx] signo[%d] code[%d]\n", + except_info->kernel_str, regs->pc, + except_info->signo, except_info->code); + + die_if_kernel(except_info->kernel_str, regs, addr); + + info.si_signo = except_info->signo; + info.si_errno = 0; + info.si_code = except_info->code; + info.si_addr = (void __user *)addr; + + force_sig_info(except_info->signo, &info, current); +} + +/* + * Process an internal exception (non maskable) + */ +static int process_iexcept(struct pt_regs *regs) +{ + unsigned int iexcept_report = get_iexcept(); + unsigned int iexcept_num; + + ack_exception(EXCEPT_TYPE_IXF); + + pr_err("IEXCEPT: PC[0x%lx]\n", regs->pc); + + while (iexcept_report) { + iexcept_num = __ffs(iexcept_report); + iexcept_report &= ~(1 << iexcept_num); + set_iexcept(iexcept_report); + if (*(unsigned int *)regs->pc == BKPT_OPCODE) { + /* This is a breakpoint */ + struct exception_info bkpt_exception = { + "Oops - undefined instruction", + SIGTRAP, TRAP_BRKPT + }; + do_trap(&bkpt_exception, regs); + iexcept_report &= ~(0xFF); + set_iexcept(iexcept_report); + continue; + } + + do_trap(&iexcept_table[iexcept_num], regs); + } + return 0; +} + +/* + * Process an external exception (maskable) + */ +static void process_eexcept(struct pt_regs *regs) +{ + int evt; + + pr_err("EEXCEPT: PC[0x%lx]\n", regs->pc); + + while ((evt = soc_get_exception()) >= 0) + do_trap(&eexcept_table[evt], regs); + + ack_exception(EXCEPT_TYPE_EXC); +} + +/* + * Main exception processing + */ +asmlinkage int process_exception(struct pt_regs *regs) +{ + unsigned int type; + unsigned int type_num; + unsigned int ie_num = 9; /* default is unknown exception */ + + while ((type = get_except_type()) != 0) { + type_num = fls(type) - 1; + + switch (type_num) { + case EXCEPT_TYPE_NXF: + ack_exception(EXCEPT_TYPE_NXF); + if (c6x_nmi_handler) + (c6x_nmi_handler)(regs); + else + pr_alert("NMI interrupt!\n"); + break; + + case EXCEPT_TYPE_IXF: + if (process_iexcept(regs)) + return 1; + break; + + case EXCEPT_TYPE_EXC: + process_eexcept(regs); + break; + + case EXCEPT_TYPE_SXF: + ie_num = 8; + default: + ack_exception(type_num); + do_trap(&iexcept_table[ie_num], regs); + break; + } + } + return 0; +} + +static int kstack_depth_to_print = 48; + +static void show_trace(unsigned long *stack, unsigned long *endstack) +{ + unsigned long addr; + int i; + + pr_debug("Call trace:"); + i = 0; + while (stack + 1 <= endstack) { + addr = *stack++; + /* + * If the address is either in the text segment of the + * kernel, or in the region which contains vmalloc'ed + * memory, it *may* be the address of a calling + * routine; if so, print it so that someone tracing + * down the cause of the crash will be able to figure + * out the call path that was taken. + */ + if (__kernel_text_address(addr)) { +#ifndef CONFIG_KALLSYMS + if (i % 5 == 0) + pr_debug("\n "); +#endif + pr_debug(" [<%08lx>]", addr); + print_symbol(" %s\n", addr); + i++; + } + } + pr_debug("\n"); +} + +void show_stack(struct task_struct *task, unsigned long *stack) +{ + unsigned long *p, *endstack; + int i; + + if (!stack) { + if (task && task != current) + /* We know this is a kernel stack, + so this is the start/end */ + stack = (unsigned long *)thread_saved_ksp(task); + else + stack = (unsigned long *)&stack; + } + endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1) + & -THREAD_SIZE); + + pr_debug("Stack from %08lx:", (unsigned long)stack); + for (i = 0, p = stack; i < kstack_depth_to_print; i++) { + if (p + 1 > endstack) + break; + if (i % 8 == 0) + pr_cont("\n "); + pr_cont(" %08lx", *p++); + } + pr_cont("\n"); + show_trace(stack, endstack); +} + +int is_valid_bugaddr(unsigned long addr) +{ + return __kernel_text_address(addr); +} diff --git a/arch/c6x/kernel/vectors.S b/arch/c6x/kernel/vectors.S new file mode 100644 index 0000000..c95c66f --- /dev/null +++ b/arch/c6x/kernel/vectors.S @@ -0,0 +1,81 @@ +; +; Port on Texas Instruments TMS320C6x architecture +; +; Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated +; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) +; +; This program is free software; you can redistribute it and/or modify +; it under the terms of the GNU General Public License version 2 as +; published by the Free Software Foundation. +; +; This section handles all the interrupt vector routines. +; At RESET the processor sets up the DRAM timing parameters and +; branches to the label _c_int00 which handles initialization for the C code. +; + +#define ALIGNMENT 5 + + .macro IRQVEC name, handler + .align ALIGNMENT + .hidden \name + .global \name +\name: +#ifdef CONFIG_C6X_BIG_KERNEL + STW .D2T1 A0,*B15--[2] + || MVKL .S1 \handler,A0 + MVKH .S1 \handler,A0 + B .S2X A0 + LDW .D2T1 *++B15[2],A0 + NOP 4 + NOP + NOP + .endm +#else /* CONFIG_C6X_BIG_KERNEL */ + B .S2 \handler + NOP + NOP + NOP + NOP + NOP + NOP + NOP + .endm +#endif /* CONFIG_C6X_BIG_KERNEL */ + + .sect ".vectors","ax" + .align ALIGNMENT + .global RESET + .hidden RESET +RESET: +#ifdef CONFIG_C6X_BIG_KERNEL + MVKL .S1 _c_int00,A0 ; branch to _c_int00 + MVKH .S1 _c_int00,A0 + B .S2X A0 +#else + B .S2 _c_int00 + NOP + NOP +#endif + NOP + NOP + NOP + NOP + NOP + + + IRQVEC NMI,_nmi_handler ; NMI interrupt + IRQVEC AINT,_bad_interrupt ; reserved + IRQVEC MSGINT,_bad_interrupt ; reserved + + IRQVEC INT4,_int4_handler + IRQVEC INT5,_int5_handler + IRQVEC INT6,_int6_handler + IRQVEC INT7,_int7_handler + IRQVEC INT8,_int8_handler + IRQVEC INT9,_int9_handler + IRQVEC INT10,_int10_handler + IRQVEC INT11,_int11_handler + IRQVEC INT12,_int12_handler + IRQVEC INT13,_int13_handler + IRQVEC INT14,_int14_handler + IRQVEC INT15,_int15_handler diff --git a/arch/c6x/kernel/vmlinux.lds.S b/arch/c6x/kernel/vmlinux.lds.S new file mode 100644 index 0000000..1d81c4c --- /dev/null +++ b/arch/c6x/kernel/vmlinux.lds.S @@ -0,0 +1,162 @@ +/* + * ld script for the c6x kernel + * + * Copyright (C) 2010, 2011 Texas Instruments Incorporated + * Mark Salter <msalter@redhat.com> + */ +#include <asm-generic/vmlinux.lds.h> +#include <asm/thread_info.h> +#include <asm/page.h> + +ENTRY(_c_int00) + +#if defined(CONFIG_CPU_BIG_ENDIAN) +jiffies = jiffies_64 + 4; +#else +jiffies = jiffies_64; +#endif + +#define READONLY_SEGMENT_START \ + . = PAGE_OFFSET; +#define READWRITE_SEGMENT_START \ + . = ALIGN(128); \ + _data_lma = .; + +SECTIONS +{ + /* + * Start kernel read only segment + */ + READONLY_SEGMENT_START + + .vectors : + { + _vectors_start = .; + *(.vectors) + . = ALIGN(0x400); + _vectors_end = .; + } + + . = ALIGN(0x1000); + .cmdline : + { + *(.cmdline) + } + + /* + * This section contains data which may be shared with other + * cores. It needs to be a fixed offset from PAGE_OFFSET + * regardless of kernel configuration. + */ + .virtio_ipc_dev : + { + *(.virtio_ipc_dev) + } + + . = ALIGN(PAGE_SIZE); + .init : + { + _stext = .; + _sinittext = .; + HEAD_TEXT + INIT_TEXT + _einittext = .; + } + + __init_begin = _stext; + INIT_DATA_SECTION(16) + + PERCPU_SECTION(128) + + . = ALIGN(PAGE_SIZE); + __init_end = .; + + .text : + { + _text = .; + TEXT_TEXT + SCHED_TEXT + LOCK_TEXT + IRQENTRY_TEXT + KPROBES_TEXT + *(.fixup) + *(.gnu.warning) + } + + EXCEPTION_TABLE(16) + NOTES + + RO_DATA_SECTION(PAGE_SIZE) + .const : + { + *(.const .const.* .gnu.linkonce.r.*) + *(.switch) + } + + . = ALIGN (8) ; + __fdt_blob : AT(ADDR(__fdt_blob) - LOAD_OFFSET) + { + _fdt_start = . ; /* place for fdt blob */ + *(__fdt_blob) ; /* Any link-placed DTB */ + BYTE(0); /* section always has contents */ + . = _fdt_start + 0x4000; /* Pad up to 16kbyte */ + _fdt_end = . ; + } + + _etext = .; + + /* + * Start kernel read-write segment. + */ + READWRITE_SEGMENT_START + _sdata = .; + + .fardata : AT(ADDR(.fardata) - LOAD_OFFSET) + { + INIT_TASK_DATA(THREAD_SIZE) + NOSAVE_DATA + PAGE_ALIGNED_DATA(PAGE_SIZE) + CACHELINE_ALIGNED_DATA(128) + READ_MOSTLY_DATA(128) + DATA_DATA + CONSTRUCTORS + *(.data1) + *(.fardata .fardata.*) + *(.data.debug_bpt) + } + + .neardata ALIGN(8) : AT(ADDR(.neardata) - LOAD_OFFSET) + { + *(.neardata2 .neardata2.* .gnu.linkonce.s2.*) + *(.neardata .neardata.* .gnu.linkonce.s.*) + . = ALIGN(8); + } + + _edata = .; + + __bss_start = .; + SBSS(8) + BSS(8) + .far : + { + . = ALIGN(8); + *(.dynfar) + *(.far .far.* .gnu.linkonce.b.*) + . = ALIGN(8); + } + __bss_stop = .; + + _end = .; + + DWARF_DEBUG + + /DISCARD/ : + { + EXIT_TEXT + EXIT_DATA + EXIT_CALL + *(.discard) + *(.discard.*) + *(.interp) + } +} diff --git a/arch/c6x/lib/Makefile b/arch/c6x/lib/Makefile new file mode 100644 index 0000000..ffd3c65 --- /dev/null +++ b/arch/c6x/lib/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for arch/c6x/lib/ +# + +lib-y := divu.o divi.o pop_rts.o push_rts.o remi.o remu.o strasgi.o llshru.o +lib-y += llshr.o llshl.o negll.o mpyll.o divremi.o divremu.o +lib-y += checksum.o csum_64plus.o memcpy_64plus.o strasgi_64plus.o diff --git a/arch/c6x/lib/checksum.c b/arch/c6x/lib/checksum.c new file mode 100644 index 0000000..67cc93b --- /dev/null +++ b/arch/c6x/lib/checksum.c @@ -0,0 +1,36 @@ +/* + * 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. + */ +#include <linux/module.h> +#include <net/checksum.h> + +#include <asm/byteorder.h> + +/* + * copy from fs while checksumming, otherwise like csum_partial + */ +__wsum +csum_partial_copy_from_user(const void __user *src, void *dst, int len, + __wsum sum, int *csum_err) +{ + int missing; + + missing = __copy_from_user(dst, src, len); + if (missing) { + memset(dst + len - missing, 0, missing); + *csum_err = -EFAULT; + } else + *csum_err = 0; + + return csum_partial(dst, len, sum); +} +EXPORT_SYMBOL(csum_partial_copy_from_user); + +/* These are from csum_64plus.S */ +EXPORT_SYMBOL(csum_partial); +EXPORT_SYMBOL(csum_partial_copy); +EXPORT_SYMBOL(ip_compute_csum); +EXPORT_SYMBOL(ip_fast_csum); diff --git a/arch/c6x/lib/csum_64plus.S b/arch/c6x/lib/csum_64plus.S new file mode 100644 index 0000000..6d25896 --- /dev/null +++ b/arch/c6x/lib/csum_64plus.S @@ -0,0 +1,419 @@ +; +; linux/arch/c6x/lib/csum_64plus.s +; +; Port on Texas Instruments TMS320C6x architecture +; +; Copyright (C) 2006, 2009, 2010, 2011 Texas Instruments Incorporated +; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) +; +; This program is free software; you can redistribute it and/or modify +; it under the terms of the GNU General Public License version 2 as +; published by the Free Software Foundation. +; +#include <linux/linkage.h> + +; +;unsigned int csum_partial_copy(const char *src, char * dst, +; int len, int sum) +; +; A4: src +; B4: dst +; A6: len +; B6: sum +; return csum in A4 +; + + .text +ENTRY(csum_partial_copy) + MVC .S2 ILC,B30 + + MV .D1X B6,A31 ; given csum + ZERO .D1 A9 ; csum (a side) +|| ZERO .D2 B9 ; csum (b side) +|| SHRU .S2X A6,2,B5 ; len / 4 + + ;; Check alignment and size + AND .S1 3,A4,A1 +|| AND .S2 3,B4,B0 + OR .L2X B0,A1,B0 ; non aligned condition +|| MVC .S2 B5,ILC +|| MVK .D2 1,B2 +|| MV .D1X B5,A1 ; words condition + [!A1] B .S1 L8 + [B0] BNOP .S1 L6,5 + + SPLOOP 1 + + ;; Main loop for aligned words + LDW .D1T1 *A4++,A7 + NOP 4 + MV .S2X A7,B7 +|| EXTU .S1 A7,0,16,A16 + STW .D2T2 B7,*B4++ +|| MPYU .M2 B7,B2,B8 +|| ADD .L1 A16,A9,A9 + NOP + SPKERNEL 8,0 +|| ADD .L2 B8,B9,B9 + + ZERO .D1 A1 +|| ADD .L1X A9,B9,A9 ; add csum from a and b sides + +L6: + [!A1] BNOP .S1 L8,5 + + ;; Main loop for non-aligned words + SPLOOP 2 + || MVK .L1 1,A2 + + LDNW .D1T1 *A4++,A7 + NOP 3 + + NOP + MV .S2X A7,B7 + || EXTU .S1 A7,0,16,A16 + || MPYU .M1 A7,A2,A8 + + ADD .L1 A16,A9,A9 + SPKERNEL 6,0 + || STNW .D2T2 B7,*B4++ + || ADD .L1 A8,A9,A9 + +L8: AND .S2X 2,A6,B5 + CMPGT .L2 B5,0,B0 + [!B0] BNOP .S1 L82,4 + + ;; Manage half-word + ZERO .L1 A7 +|| ZERO .D1 A8 + +#ifdef CONFIG_CPU_BIG_ENDIAN + + LDBU .D1T1 *A4++,A7 + LDBU .D1T1 *A4++,A8 + NOP 3 + SHL .S1 A7,8,A0 + ADD .S1 A8,A9,A9 + STB .D2T1 A7,*B4++ +|| ADD .S1 A0,A9,A9 + STB .D2T1 A8,*B4++ + +#else + + LDBU .D1T1 *A4++,A7 + LDBU .D1T1 *A4++,A8 + NOP 3 + ADD .S1 A7,A9,A9 + SHL .S1 A8,8,A0 + + STB .D2T1 A7,*B4++ +|| ADD .S1 A0,A9,A9 + STB .D2T1 A8,*B4++ + +#endif + + ;; Manage eventually the last byte +L82: AND .S2X 1,A6,B0 + [!B0] BNOP .S1 L9,5 + +|| ZERO .L1 A7 + +L83: LDBU .D1T1 *A4++,A7 + NOP 4 + + MV .L2X A7,B7 + +#ifdef CONFIG_CPU_BIG_ENDIAN + + STB .D2T2 B7,*B4++ +|| SHL .S1 A7,8,A7 + ADD .S1 A7,A9,A9 + +#else + + STB .D2T2 B7,*B4++ +|| ADD .S1 A7,A9,A9 + +#endif + + ;; Fold the csum +L9: SHRU .S2X A9,16,B0 + [!B0] BNOP .S1 L10,5 + +L91: SHRU .S2X A9,16,B4 +|| EXTU .S1 A9,16,16,A3 + ADD .D1X A3,B4,A9 + + SHRU .S1 A9,16,A0 + [A0] BNOP .S1 L91,5 + +L10: ADD .D1 A31,A9,A9 + MV .D1 A9,A4 + + BNOP .S2 B3,4 + MVC .S2 B30,ILC +ENDPROC(csum_partial_copy) + +; +;unsigned short +;ip_fast_csum(unsigned char *iph, unsigned int ihl) +;{ +; unsigned int checksum = 0; +; unsigned short *tosum = (unsigned short *) iph; +; int len; +; +; len = ihl*4; +; +; if (len <= 0) +; return 0; +; +; while(len) { +; len -= 2; +; checksum += *tosum++; +; } +; if (len & 1) +; checksum += *(unsigned char*) tosum; +; +; while(checksum >> 16) +; checksum = (checksum & 0xffff) + (checksum >> 16); +; +; return ~checksum; +;} +; +; A4: iph +; B4: ihl +; return checksum in A4 +; + .text + +ENTRY(ip_fast_csum) + ZERO .D1 A5 + || MVC .S2 ILC,B30 + SHL .S2 B4,2,B0 + CMPGT .L2 B0,0,B1 + [!B1] BNOP .S1 L15,4 + [!B1] ZERO .D1 A3 + + [!B0] B .S1 L12 + SHRU .S2 B0,1,B0 + MVC .S2 B0,ILC + NOP 3 + + SPLOOP 1 + LDHU .D1T1 *A4++,A3 + NOP 3 + NOP + SPKERNEL 5,0 + || ADD .L1 A3,A5,A5 + +L12: SHRU .S1 A5,16,A0 + [!A0] BNOP .S1 L14,5 + +L13: SHRU .S2X A5,16,B4 + EXTU .S1 A5,16,16,A3 + ADD .D1X A3,B4,A5 + SHRU .S1 A5,16,A0 + [A0] BNOP .S1 L13,5 + +L14: NOT .D1 A5,A3 + EXTU .S1 A3,16,16,A3 + +L15: BNOP .S2 B3,3 + MVC .S2 B30,ILC + MV .D1 A3,A4 +ENDPROC(ip_fast_csum) + +; +;unsigned short +;do_csum(unsigned char *buff, unsigned int len) +;{ +; int odd, count; +; unsigned int result = 0; +; +; if (len <= 0) +; goto out; +; odd = 1 & (unsigned long) buff; +; if (odd) { +;#ifdef __LITTLE_ENDIAN +; result += (*buff << 8); +;#else +; result = *buff; +;#endif +; 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 int carry = 0; +; do { +; unsigned int w = *(unsigned int *) buff; +; count--; +; buff += 4; +; 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) +;#ifdef __LITTLE_ENDIAN +; result += *buff; +;#else +; result += (*buff << 8); +;#endif +; result = (result & 0xffff) + (result >> 16); +; /* add up carry.. */ +; result = (result & 0xffff) + (result >> 16); +; if (odd) +; result = ((result >> 8) & 0xff) | ((result & 0xff) << 8); +;out: +; return result; +;} +; +; A4: buff +; B4: len +; return checksum in A4 +; + +ENTRY(do_csum) + CMPGT .L2 B4,0,B0 + [!B0] BNOP .S1 L26,3 + EXTU .S1 A4,31,31,A0 + + MV .L1 A0,A3 +|| MV .S1X B3,A5 +|| MV .L2 B4,B3 +|| ZERO .D1 A1 + +#ifdef CONFIG_CPU_BIG_ENDIAN + [A0] SUB .L2 B3,1,B3 +|| [A0] LDBU .D1T1 *A4++,A1 +#else + [!A0] BNOP .S1 L21,5 +|| [A0] LDBU .D1T1 *A4++,A0 + SUB .L2 B3,1,B3 +|| SHL .S1 A0,8,A1 +L21: +#endif + SHR .S2 B3,1,B0 + [!B0] BNOP .S1 L24,3 + MVK .L1 2,A0 + AND .L1 A4,A0,A0 + + [!A0] BNOP .S1 L22,5 +|| [A0] LDHU .D1T1 *A4++,A0 + SUB .L2 B0,1,B0 +|| SUB .S2 B3,2,B3 +|| ADD .L1 A0,A1,A1 +L22: + SHR .S2 B0,1,B0 +|| ZERO .L1 A0 + + [!B0] BNOP .S1 L23,5 +|| [B0] MVC .S2 B0,ILC + + SPLOOP 3 + SPMASK L1 +|| MV .L1 A1,A2 +|| LDW .D1T1 *A4++,A1 + + NOP 4 + ADD .L1 A0,A1,A0 + ADD .L1 A2,A0,A2 + + SPKERNEL 1,2 +|| CMPGTU .L1 A1,A2,A0 + + ADD .L1 A0,A2,A6 + EXTU .S1 A6,16,16,A7 + SHRU .S2X A6,16,B0 + NOP 1 + ADD .L1X A7,B0,A1 +L23: + MVK .L2 2,B0 + AND .L2 B3,B0,B0 + [B0] LDHU .D1T1 *A4++,A0 + NOP 4 + [B0] ADD .L1 A0,A1,A1 +L24: + EXTU .S2 B3,31,31,B0 +#ifdef CONFIG_CPU_BIG_ENDIAN + [!B0] BNOP .S1 L25,4 +|| [B0] LDBU .D1T1 *A4,A0 + SHL .S1 A0,8,A0 + ADD .L1 A0,A1,A1 +L25: +#else + [B0] LDBU .D1T1 *A4,A0 + NOP 4 + [B0] ADD .L1 A0,A1,A1 +#endif + EXTU .S1 A1,16,16,A0 + SHRU .S2X A1,16,B0 + NOP 1 + ADD .L1X A0,B0,A0 + SHRU .S1 A0,16,A1 + ADD .L1 A0,A1,A0 + EXTU .S1 A0,16,16,A1 + EXTU .S1 A1,16,24,A2 + + EXTU .S1 A1,24,16,A0 +|| MV .L2X A3,B0 + + [B0] OR .L1 A0,A2,A1 +L26: + NOP 1 + BNOP .S2X A5,4 + MV .L1 A1,A4 +ENDPROC(do_csum) + +;__wsum csum_partial(const void *buff, int len, __wsum wsum) +;{ +; unsigned int sum = (__force unsigned int)wsum; +; unsigned int result = do_csum(buff, len); +; +; /* add in old sum, and carry.. */ +; result += sum; +; if (sum > result) +; result += 1; +; return (__force __wsum)result; +;} +; +ENTRY(csum_partial) + MV .L1X B3,A9 +|| CALLP .S2 do_csum,B3 +|| MV .S1 A6,A8 + BNOP .S2X A9,2 + ADD .L1 A8,A4,A1 + CMPGTU .L1 A8,A1,A0 + ADD .L1 A1,A0,A4 +ENDPROC(csum_partial) + +;unsigned short +;ip_compute_csum(unsigned char *buff, unsigned int len) +; +; A4: buff +; B4: len +; return checksum in A4 + +ENTRY(ip_compute_csum) + MV .L1X B3,A9 +|| CALLP .S2 do_csum,B3 + BNOP .S2X A9,3 + NOT .S1 A4,A4 + CLR .S1 A4,16,31,A4 +ENDPROC(ip_compute_csum) diff --git a/arch/c6x/lib/divi.S b/arch/c6x/lib/divi.S new file mode 100644 index 0000000..4bde924 --- /dev/null +++ b/arch/c6x/lib/divi.S @@ -0,0 +1,53 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + ;; ABI considerations for the divide functions + ;; The following registers are call-used: + ;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5 + ;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4 + ;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4 + ;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4 + ;; + ;; In our implementation, divu and remu are leaf functions, + ;; while both divi and remi call into divu. + ;; A0 is not clobbered by any of the functions. + ;; divu does not clobber B2 either, which is taken advantage of + ;; in remi. + ;; divi uses B5 to hold the original return address during + ;; the call to divu. + ;; remi uses B2 and A5 to hold the input values during the + ;; call to divu. It stores B3 in on the stack. + + .text +ENTRY(__c6xabi_divi) + call .s2 __c6xabi_divu +|| mv .d2 B3, B5 +|| cmpgt .l1 0, A4, A1 +|| cmpgt .l2 0, B4, B1 + + [A1] neg .l1 A4, A4 +|| [B1] neg .l2 B4, B4 +|| xor .s1x A1, B1, A1 + [A1] addkpc .s2 _divu_ret, B3, 4 +_divu_ret: + neg .l1 A4, A4 +|| mv .l2 B3,B5 +|| ret .s2 B5 + nop 5 +ENDPROC(__c6xabi_divi) diff --git a/arch/c6x/lib/divremi.S b/arch/c6x/lib/divremi.S new file mode 100644 index 0000000..64bc5aa --- /dev/null +++ b/arch/c6x/lib/divremi.S @@ -0,0 +1,46 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + .text +ENTRY(__c6xabi_divremi) + stw .d2t2 B3, *B15--[2] +|| cmpgt .l1 0, A4, A1 +|| cmpgt .l2 0, B4, B2 +|| mv .s1 A4, A5 +|| call .s2 __c6xabi_divu + + [A1] neg .l1 A4, A4 +|| [B2] neg .l2 B4, B4 +|| xor .s2x B2, A1, B0 +|| mv .d2 B4, B2 + + [B0] addkpc .s2 _divu_ret_1, B3, 1 + [!B0] addkpc .s2 _divu_ret_2, B3, 1 + nop 2 +_divu_ret_1: + neg .l1 A4, A4 +_divu_ret_2: + ldw .d2t2 *++B15[2], B3 + + mpy32 .m1x A4, B2, A6 + nop 3 + ret .s2 B3 + sub .l1 A5, A6, A5 + nop 4 +ENDPROC(__c6xabi_divremi) diff --git a/arch/c6x/lib/divremu.S b/arch/c6x/lib/divremu.S new file mode 100644 index 0000000..caa9f23 --- /dev/null +++ b/arch/c6x/lib/divremu.S @@ -0,0 +1,87 @@ +;; Copyright 2011 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + .text +ENTRY(__c6xabi_divremu) + ;; We use a series of up to 31 subc instructions. First, we find + ;; out how many leading zero bits there are in the divisor. This + ;; gives us both a shift count for aligning (shifting) the divisor + ;; to the, and the number of times we have to execute subc. + + ;; At the end, we have both the remainder and most of the quotient + ;; in A4. The top bit of the quotient is computed first and is + ;; placed in A2. + + ;; Return immediately if the dividend is zero. Setting B4 to 1 + ;; is a trick to allow us to leave the following insns in the jump + ;; delay slot without affecting the result. + mv .s2x A4, B1 + + [b1] lmbd .l2 1, B4, B1 +||[!b1] b .s2 B3 ; RETURN A +||[!b1] mvk .d2 1, B4 + +||[!b1] zero .s1 A5 + mv .l1x B1, A6 +|| shl .s2 B4, B1, B4 + + ;; The loop performs a maximum of 28 steps, so we do the + ;; first 3 here. + cmpltu .l1x A4, B4, A2 + [!A2] sub .l1x A4, B4, A4 +|| shru .s2 B4, 1, B4 +|| xor .s1 1, A2, A2 + + shl .s1 A2, 31, A2 +|| [b1] subc .l1x A4,B4,A4 +|| [b1] add .s2 -1, B1, B1 + [b1] subc .l1x A4,B4,A4 +|| [b1] add .s2 -1, B1, B1 + + ;; RETURN A may happen here (note: must happen before the next branch) +__divremu0: + cmpgt .l2 B1, 7, B0 +|| [b1] subc .l1x A4,B4,A4 +|| [b1] add .s2 -1, B1, B1 + [b1] subc .l1x A4,B4,A4 +|| [b1] add .s2 -1, B1, B1 +|| [b0] b .s1 __divremu0 + [b1] subc .l1x A4,B4,A4 +|| [b1] add .s2 -1, B1, B1 + [b1] subc .l1x A4,B4,A4 +|| [b1] add .s2 -1, B1, B1 + [b1] subc .l1x A4,B4,A4 +|| [b1] add .s2 -1, B1, B1 + [b1] subc .l1x A4,B4,A4 +|| [b1] add .s2 -1, B1, B1 + [b1] subc .l1x A4,B4,A4 +|| [b1] add .s2 -1, B1, B1 + ;; loop backwards branch happens here + + ret .s2 B3 +|| mvk .s1 32, A1 + sub .l1 A1, A6, A6 +|| extu .s1 A4, A6, A5 + shl .s1 A4, A6, A4 + shru .s1 A4, 1, A4 +|| sub .l1 A6, 1, A6 + or .l1 A2, A4, A4 + shru .s1 A4, A6, A4 + nop +ENDPROC(__c6xabi_divremu) diff --git a/arch/c6x/lib/divu.S b/arch/c6x/lib/divu.S new file mode 100644 index 0000000..64af3c0 --- /dev/null +++ b/arch/c6x/lib/divu.S @@ -0,0 +1,98 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + ;; ABI considerations for the divide functions + ;; The following registers are call-used: + ;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5 + ;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4 + ;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4 + ;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4 + ;; + ;; In our implementation, divu and remu are leaf functions, + ;; while both divi and remi call into divu. + ;; A0 is not clobbered by any of the functions. + ;; divu does not clobber B2 either, which is taken advantage of + ;; in remi. + ;; divi uses B5 to hold the original return address during + ;; the call to divu. + ;; remi uses B2 and A5 to hold the input values during the + ;; call to divu. It stores B3 in on the stack. + + .text +ENTRY(__c6xabi_divu) + ;; We use a series of up to 31 subc instructions. First, we find + ;; out how many leading zero bits there are in the divisor. This + ;; gives us both a shift count for aligning (shifting) the divisor + ;; to the, and the number of times we have to execute subc. + + ;; At the end, we have both the remainder and most of the quotient + ;; in A4. The top bit of the quotient is computed first and is + ;; placed in A2. + + ;; Return immediately if the dividend is zero. + mv .s2x A4, B1 + [B1] lmbd .l2 1, B4, B1 +|| [!B1] b .s2 B3 ; RETURN A +|| [!B1] mvk .d2 1, B4 + mv .l1x B1, A6 +|| shl .s2 B4, B1, B4 + + ;; The loop performs a maximum of 28 steps, so we do the + ;; first 3 here. + cmpltu .l1x A4, B4, A2 + [!A2] sub .l1x A4, B4, A4 +|| shru .s2 B4, 1, B4 +|| xor .s1 1, A2, A2 + + shl .s1 A2, 31, A2 +|| [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + + ;; RETURN A may happen here (note: must happen before the next branch) +_divu_loop: + cmpgt .l2 B1, 7, B0 +|| [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 +|| [B0] b .s1 _divu_loop + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + ;; loop backwards branch happens here + + ret .s2 B3 +|| mvk .s1 32, A1 + sub .l1 A1, A6, A6 + shl .s1 A4, A6, A4 + shru .s1 A4, 1, A4 +|| sub .l1 A6, 1, A6 + or .l1 A2, A4, A4 + shru .s1 A4, A6, A4 + nop +ENDPROC(__c6xabi_divu) diff --git a/arch/c6x/lib/llshl.S b/arch/c6x/lib/llshl.S new file mode 100644 index 0000000..7b105e2 --- /dev/null +++ b/arch/c6x/lib/llshl.S @@ -0,0 +1,37 @@ +;; Copyright (C) 2010 Texas Instruments Incorporated +;; Contributed by Mark Salter <msalter@redhat.com>. +;; +;; 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. + +;; uint64_t __c6xabi_llshl(uint64_t val, uint shift) + +#include <linux/linkage.h> + + .text +ENTRY(__c6xabi_llshl) + mv .l1x B4,A1 + [!A1] b .s2 B3 ; just return if zero shift + mvk .s1 32,A0 + sub .d1 A0,A1,A0 + cmplt .l1 0,A0,A2 + [A2] shru .s1 A4,A0,A0 + [!A2] neg .l1 A0,A5 +|| [A2] shl .s1 A5,A1,A5 + [!A2] shl .s1 A4,A5,A5 +|| [A2] or .d1 A5,A0,A5 +|| [!A2] mvk .l1 0,A4 + [A2] shl .s1 A4,A1,A4 + bnop .s2 B3,5 +ENDPROC(__c6xabi_llshl) diff --git a/arch/c6x/lib/llshr.S b/arch/c6x/lib/llshr.S new file mode 100644 index 0000000..fde1bec --- /dev/null +++ b/arch/c6x/lib/llshr.S @@ -0,0 +1,38 @@ +;; Copyright (C) 2010 Texas Instruments Incorporated +;; Contributed by Mark Salter <msalter@redhat.com>. +;; +;; 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. + +;; uint64_t __c6xabi_llshr(uint64_t val, uint shift) + +#include <linux/linkage.h> + + .text +ENTRY(__c6xabi_llshr) + mv .l1x B4,A1 + [!A1] b .s2 B3 ; return if zero shift count + mvk .s1 32,A0 + sub .d1 A0,A1,A0 + cmplt .l1 0,A0,A2 + [A2] shl .s1 A5,A0,A0 + nop + [!A2] neg .l1 A0,A4 +|| [A2] shru .s1 A4,A1,A4 + [!A2] shr .s1 A5,A4,A4 +|| [A2] or .d1 A4,A0,A4 + [!A2] shr .s1 A5,0x1f,A5 + [A2] shr .s1 A5,A1,A5 + bnop .s2 B3,5 +ENDPROC(__c6xabi_llshr) diff --git a/arch/c6x/lib/llshru.S b/arch/c6x/lib/llshru.S new file mode 100644 index 0000000..596ae3f --- /dev/null +++ b/arch/c6x/lib/llshru.S @@ -0,0 +1,38 @@ +;; Copyright (C) 2010 Texas Instruments Incorporated +;; Contributed by Mark Salter <msalter@redhat.com>. +;; +;; 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. + +;; uint64_t __c6xabi_llshru(uint64_t val, uint shift) + +#include <linux/linkage.h> + + .text +ENTRY(__c6xabi_llshru) + mv .l1x B4,A1 + [!A1] b .s2 B3 ; return if zero shift count + mvk .s1 32,A0 + sub .d1 A0,A1,A0 + cmplt .l1 0,A0,A2 + [A2] shl .s1 A5,A0,A0 + nop + [!A2] neg .l1 A0,A4 +|| [A2] shru .s1 A4,A1,A4 + [!A2] shru .s1 A5,A4,A4 +|| [A2] or .d1 A4,A0,A4 +|| [!A2] mvk .l1 0,A5 + [A2] shru .s1 A5,A1,A5 + bnop .s2 B3,5 +ENDPROC(__c6xabi_llshru) diff --git a/arch/c6x/lib/memcpy_64plus.S b/arch/c6x/lib/memcpy_64plus.S new file mode 100644 index 0000000..0bbc2cb --- /dev/null +++ b/arch/c6x/lib/memcpy_64plus.S @@ -0,0 +1,46 @@ +; Port on Texas Instruments TMS320C6x architecture +; +; Copyright (C) 2006, 2009, 2010 Texas Instruments Incorporated +; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) +; +; This program is free software; you can redistribute it and/or modify +; it under the terms of the GNU General Public License version 2 as +; published by the Free Software Foundation. +; + +#include <linux/linkage.h> + + .text + +ENTRY(memcpy) + AND .L1 0x1,A6,A0 + || AND .S1 0x2,A6,A1 + || AND .L2X 0x4,A6,B0 + || MV .D1 A4,A3 + || MVC .S2 ILC,B2 + + [A0] LDB .D2T1 *B4++,A5 + [A1] LDB .D2T1 *B4++,A7 + [A1] LDB .D2T1 *B4++,A8 + [B0] LDNW .D2T1 *B4++,A9 + || SHRU .S2X A6,0x3,B1 + [!B1] BNOP .S2 B3,1 + + [A0] STB .D1T1 A5,*A3++ + ||[B1] MVC .S2 B1,ILC + [A1] STB .D1T1 A7,*A3++ + [A1] STB .D1T1 A8,*A3++ + [B0] STNW .D1T1 A9,*A3++ ; return when len < 8 + + SPLOOP 2 + + LDNDW .D2T1 *B4++,A9:A8 + NOP 3 + + NOP + SPKERNEL 0,0 + || STNDW .D1T1 A9:A8,*A3++ + + BNOP .S2 B3,4 + MVC .S2 B2,ILC +ENDPROC(memcpy) diff --git a/arch/c6x/lib/mpyll.S b/arch/c6x/lib/mpyll.S new file mode 100644 index 0000000..f103441 --- /dev/null +++ b/arch/c6x/lib/mpyll.S @@ -0,0 +1,49 @@ +;; Copyright (C) 2010 Texas Instruments Incorporated +;; Contributed by Mark Salter <msalter@redhat.com>. +;; +;; 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. + +#include <linux/linkage.h> + + ;; uint64_t __c6xabi_mpyll(uint64_t x, uint64_t y) + ;; + ;; 64x64 multiply + ;; First compute partial results using 32-bit parts of x and y: + ;; + ;; b63 b32 b31 b0 + ;; ----------------------------- + ;; | 1 | 0 | + ;; ----------------------------- + ;; + ;; P0 = X0*Y0 + ;; P1 = X0*Y1 + X1*Y0 + ;; P2 = X1*Y1 + ;; + ;; result = (P2 << 64) + (P1 << 32) + P0 + ;; + ;; Since the result is also 64-bit, we can skip the P2 term. + + .text +ENTRY(__c6xabi_mpyll) + mpy32u .m1x A4,B4,A1:A0 ; X0*Y0 + b .s2 B3 + || mpy32u .m2x B5,A4,B1:B0 ; X0*Y1 (don't need upper 32-bits) + || mpy32u .m1x A5,B4,A3:A2 ; X1*Y0 (don't need upper 32-bits) + nop + nop + mv .s1 A0,A4 + add .l1x A2,B0,A5 + add .s1 A1,A5,A5 +ENDPROC(__c6xabi_mpyll) diff --git a/arch/c6x/lib/negll.S b/arch/c6x/lib/negll.S new file mode 100644 index 0000000..82f4bce --- /dev/null +++ b/arch/c6x/lib/negll.S @@ -0,0 +1,31 @@ +;; Copyright (C) 2010 Texas Instruments Incorporated +;; Contributed by Mark Salter <msalter@redhat.com>. +;; +;; 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. + +;; int64_t __c6xabi_negll(int64_t val) + +#include <linux/linkage.h> + + .text +ENTRY(__c6xabi_negll) + b .s2 B3 + mvk .l1 0,A0 + subu .l1 A0,A4,A3:A2 + sub .l1 A0,A5,A0 +|| ext .s1 A3,24,24,A5 + add .l1 A5,A0,A5 + mv .s1 A2,A4 +ENDPROC(__c6xabi_negll) diff --git a/arch/c6x/lib/pop_rts.S b/arch/c6x/lib/pop_rts.S new file mode 100644 index 0000000..d7d96c7 --- /dev/null +++ b/arch/c6x/lib/pop_rts.S @@ -0,0 +1,32 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + .text + +ENTRY(__c6xabi_pop_rts) + lddw .d2t2 *++B15, B3:B2 + lddw .d2t1 *++B15, A11:A10 + lddw .d2t2 *++B15, B11:B10 + lddw .d2t1 *++B15, A13:A12 + lddw .d2t2 *++B15, B13:B12 + lddw .d2t1 *++B15, A15:A14 +|| b .s2 B3 + ldw .d2t2 *++B15[2], B14 + nop 4 +ENDPROC(__c6xabi_pop_rts) diff --git a/arch/c6x/lib/push_rts.S b/arch/c6x/lib/push_rts.S new file mode 100644 index 0000000..f6e3db3 --- /dev/null +++ b/arch/c6x/lib/push_rts.S @@ -0,0 +1,31 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + .text + +ENTRY(__c6xabi_push_rts) + stw .d2t2 B14, *B15--[2] + stdw .d2t1 A15:A14, *B15-- +|| b .s2x A3 + stdw .d2t2 B13:B12, *B15-- + stdw .d2t1 A13:A12, *B15-- + stdw .d2t2 B11:B10, *B15-- + stdw .d2t1 A11:A10, *B15-- + stdw .d2t2 B3:B2, *B15-- +ENDPROC(__c6xabi_push_rts) diff --git a/arch/c6x/lib/remi.S b/arch/c6x/lib/remi.S new file mode 100644 index 0000000..6f2ca18 --- /dev/null +++ b/arch/c6x/lib/remi.S @@ -0,0 +1,64 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + ;; ABI considerations for the divide functions + ;; The following registers are call-used: + ;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5 + ;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4 + ;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4 + ;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4 + ;; + ;; In our implementation, divu and remu are leaf functions, + ;; while both divi and remi call into divu. + ;; A0 is not clobbered by any of the functions. + ;; divu does not clobber B2 either, which is taken advantage of + ;; in remi. + ;; divi uses B5 to hold the original return address during + ;; the call to divu. + ;; remi uses B2 and A5 to hold the input values during the + ;; call to divu. It stores B3 in on the stack. + + .text + +ENTRY(__c6xabi_remi) + stw .d2t2 B3, *B15--[2] +|| cmpgt .l1 0, A4, A1 +|| cmpgt .l2 0, B4, B2 +|| mv .s1 A4, A5 +|| call .s2 __c6xabi_divu + + [A1] neg .l1 A4, A4 +|| [B2] neg .l2 B4, B4 +|| xor .s2x B2, A1, B0 +|| mv .d2 B4, B2 + + [B0] addkpc .s2 _divu_ret_1, B3, 1 + [!B0] addkpc .s2 _divu_ret_2, B3, 1 + nop 2 +_divu_ret_1: + neg .l1 A4, A4 +_divu_ret_2: + ldw .d2t2 *++B15[2], B3 + + mpy32 .m1x A4, B2, A6 + nop 3 + ret .s2 B3 + sub .l1 A5, A6, A4 + nop 4 +ENDPROC(__c6xabi_remi) diff --git a/arch/c6x/lib/remu.S b/arch/c6x/lib/remu.S new file mode 100644 index 0000000..3fae719 --- /dev/null +++ b/arch/c6x/lib/remu.S @@ -0,0 +1,82 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + ;; ABI considerations for the divide functions + ;; The following registers are call-used: + ;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5 + ;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4 + ;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4 + ;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4 + ;; + ;; In our implementation, divu and remu are leaf functions, + ;; while both divi and remi call into divu. + ;; A0 is not clobbered by any of the functions. + ;; divu does not clobber B2 either, which is taken advantage of + ;; in remi. + ;; divi uses B5 to hold the original return address during + ;; the call to divu. + ;; remi uses B2 and A5 to hold the input values during the + ;; call to divu. It stores B3 in on the stack. + + + .text + +ENTRY(__c6xabi_remu) + ;; The ABI seems designed to prevent these functions calling each other, + ;; so we duplicate most of the divsi3 code here. + mv .s2x A4, B1 + lmbd .l2 1, B4, B1 +|| [!B1] b .s2 B3 ; RETURN A +|| [!B1] mvk .d2 1, B4 + + mv .l1x B1, A7 +|| shl .s2 B4, B1, B4 + + cmpltu .l1x A4, B4, A1 + [!A1] sub .l1x A4, B4, A4 + shru .s2 B4, 1, B4 + +_remu_loop: + cmpgt .l2 B1, 7, B0 +|| [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + ;; RETURN A may happen here (note: must happen before the next branch) + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 +|| [B0] b .s1 _remu_loop + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + ;; loop backwards branch happens here + + ret .s2 B3 + [B1] subc .l1x A4,B4,A4 +|| [B1] add .s2 -1, B1, B1 + [B1] subc .l1x A4,B4,A4 + + extu .s1 A4, A7, A4 + nop 2 +ENDPROC(__c6xabi_remu) diff --git a/arch/c6x/lib/strasgi.S b/arch/c6x/lib/strasgi.S new file mode 100644 index 0000000..de274076 --- /dev/null +++ b/arch/c6x/lib/strasgi.S @@ -0,0 +1,89 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + .text + +ENTRY(__c6xabi_strasgi) + ;; This is essentially memcpy, with alignment known to be at least + ;; 4, and the size a multiple of 4 greater than or equal to 28. + ldw .d2t1 *B4++, A0 +|| mvk .s2 16, B1 + ldw .d2t1 *B4++, A1 +|| mvk .s2 20, B2 +|| sub .d1 A6, 24, A6 + ldw .d2t1 *B4++, A5 + ldw .d2t1 *B4++, A7 +|| mv .l2x A6, B7 + ldw .d2t1 *B4++, A8 + ldw .d2t1 *B4++, A9 +|| mv .s2x A0, B5 +|| cmpltu .l2 B2, B7, B0 + +_strasgi_loop: + stw .d1t2 B5, *A4++ +|| [B0] ldw .d2t1 *B4++, A0 +|| mv .s2x A1, B5 +|| mv .l2 B7, B6 + + [B0] sub .d2 B6, 24, B7 +|| [B0] b .s2 _strasgi_loop +|| cmpltu .l2 B1, B6, B0 + + [B0] ldw .d2t1 *B4++, A1 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A5, B5 +|| cmpltu .l2 12, B6, B0 + + [B0] ldw .d2t1 *B4++, A5 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A7, B5 +|| cmpltu .l2 8, B6, B0 + + [B0] ldw .d2t1 *B4++, A7 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A8, B5 +|| cmpltu .l2 4, B6, B0 + + [B0] ldw .d2t1 *B4++, A8 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A9, B5 +|| cmpltu .l2 0, B6, B0 + + [B0] ldw .d2t1 *B4++, A9 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A0, B5 +|| cmpltu .l2 B2, B7, B0 + + ;; loop back branch happens here + + cmpltu .l2 B1, B6, B0 +|| ret .s2 b3 + + [B0] stw .d1t1 A1, *A4++ +|| cmpltu .l2 12, B6, B0 + [B0] stw .d1t1 A5, *A4++ +|| cmpltu .l2 8, B6, B0 + [B0] stw .d1t1 A7, *A4++ +|| cmpltu .l2 4, B6, B0 + [B0] stw .d1t1 A8, *A4++ +|| cmpltu .l2 0, B6, B0 + [B0] stw .d1t1 A9, *A4++ + + ;; return happens here +ENDPROC(__c6xabi_strasgi) diff --git a/arch/c6x/lib/strasgi_64plus.S b/arch/c6x/lib/strasgi_64plus.S new file mode 100644 index 0000000..c9fd159 --- /dev/null +++ b/arch/c6x/lib/strasgi_64plus.S @@ -0,0 +1,39 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; 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. + +#include <linux/linkage.h> + + .text + +ENTRY(__c6xabi_strasgi_64plus) + shru .s2x a6, 2, b31 +|| mv .s1 a4, a30 +|| mv .d2 b4, b30 + + add .s2 -4, b31, b31 + + sploopd 1 +|| mvc .s2 b31, ilc + ldw .d2t2 *b30++, b31 + nop 4 + mv .s1x b31,a31 + spkernel 6, 0 +|| stw .d1t1 a31, *a30++ + + ret .s2 b3 + nop 5 +ENDPROC(__c6xabi_strasgi_64plus) diff --git a/arch/c6x/mm/Makefile b/arch/c6x/mm/Makefile new file mode 100644 index 0000000..136a975 --- /dev/null +++ b/arch/c6x/mm/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the linux c6x-specific parts of the memory manager. +# + +obj-y := init.o dma-coherent.o diff --git a/arch/c6x/mm/dma-coherent.c b/arch/c6x/mm/dma-coherent.c new file mode 100644 index 0000000..4187e51 --- /dev/null +++ b/arch/c6x/mm/dma-coherent.c @@ -0,0 +1,143 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * DMA uncached mapping support. + * + * Using code pulled from ARM + * Copyright (C) 2000-2004 Russell King + * + */ +#include <linux/slab.h> +#include <linux/bitmap.h> +#include <linux/bitops.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/dma-mapping.h> +#include <linux/memblock.h> + +#include <asm/page.h> + +/* + * DMA coherent memory management, can be redefined using the memdma= + * kernel command line + */ + +/* none by default */ +static phys_addr_t dma_base; +static u32 dma_size; +static u32 dma_pages; + +static unsigned long *dma_bitmap; + +/* bitmap lock */ +static DEFINE_SPINLOCK(dma_lock); + +/* + * Return a DMA coherent and contiguous memory chunk from the DMA memory + */ +static inline u32 __alloc_dma_pages(int order) +{ + unsigned long flags; + u32 pos; + + spin_lock_irqsave(&dma_lock, flags); + pos = bitmap_find_free_region(dma_bitmap, dma_pages, order); + spin_unlock_irqrestore(&dma_lock, flags); + + return dma_base + (pos << PAGE_SHIFT); +} + +static void __free_dma_pages(u32 addr, int order) +{ + unsigned long flags; + u32 pos = (addr - dma_base) >> PAGE_SHIFT; + + if (addr < dma_base || (pos + (1 << order)) >= dma_pages) { + printk(KERN_ERR "%s: freeing outside range.\n", __func__); + BUG(); + } + + spin_lock_irqsave(&dma_lock, flags); + bitmap_release_region(dma_bitmap, pos, order); + spin_unlock_irqrestore(&dma_lock, flags); +} + +/* + * Allocate DMA coherent memory space and return both the kernel + * virtual and DMA address for that space. + */ +void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *handle, gfp_t gfp) +{ + u32 paddr; + int order; + + if (!dma_size || !size) + return NULL; + + order = get_count_order(((size - 1) >> PAGE_SHIFT) + 1); + + paddr = __alloc_dma_pages(order); + + if (handle) + *handle = paddr; + + if (!paddr) + return NULL; + + return phys_to_virt(paddr); +} +EXPORT_SYMBOL(dma_alloc_coherent); + +/* + * Free DMA coherent memory as defined by the above mapping. + */ +void dma_free_coherent(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle) +{ + int order; + + if (!dma_size || !size) + return; + + order = get_count_order(((size - 1) >> PAGE_SHIFT) + 1); + + __free_dma_pages(virt_to_phys(vaddr), order); +} +EXPORT_SYMBOL(dma_free_coherent); + +/* + * Initialise the coherent DMA memory allocator using the given uncached region. + */ +void __init coherent_mem_init(phys_addr_t start, u32 size) +{ + phys_addr_t bitmap_phys; + + if (!size) + return; + + printk(KERN_INFO + "Coherent memory (DMA) region start=0x%x size=0x%x\n", + start, size); + + dma_base = start; + dma_size = size; + + /* allocate bitmap */ + dma_pages = dma_size >> PAGE_SHIFT; + if (dma_size & (PAGE_SIZE - 1)) + ++dma_pages; + + bitmap_phys = memblock_alloc(BITS_TO_LONGS(dma_pages) * sizeof(long), + sizeof(long)); + + dma_bitmap = phys_to_virt(bitmap_phys); + memset(dma_bitmap, 0, dma_pages * PAGE_SIZE); +} diff --git a/arch/c6x/mm/init.c b/arch/c6x/mm/init.c new file mode 100644 index 0000000..89395f0 --- /dev/null +++ b/arch/c6x/mm/init.c @@ -0,0 +1,113 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated + * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/mm.h> +#include <linux/swap.h> +#include <linux/module.h> +#include <linux/bootmem.h> +#ifdef CONFIG_BLK_DEV_RAM +#include <linux/blkdev.h> +#endif +#include <linux/initrd.h> + +#include <asm/sections.h> + +/* + * ZERO_PAGE is a special page that is used for zero-initialized + * data and COW. + */ +unsigned long empty_zero_page; +EXPORT_SYMBOL(empty_zero_page); + +/* + * paging_init() continues the virtual memory environment setup which + * was begun by the code in arch/head.S. + * The parameters are pointers to where to stick the starting and ending + * addresses of available kernel virtual memory. + */ +void __init paging_init(void) +{ + struct pglist_data *pgdat = NODE_DATA(0); + unsigned long zones_size[MAX_NR_ZONES] = {0, }; + + empty_zero_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE); + memset((void *)empty_zero_page, 0, PAGE_SIZE); + + /* + * Set up user data space + */ + set_fs(KERNEL_DS); + + /* + * Define zones + */ + zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT; + pgdat->node_zones[ZONE_NORMAL].zone_start_pfn = + __pa(PAGE_OFFSET) >> PAGE_SHIFT; + + free_area_init(zones_size); +} + +void __init mem_init(void) +{ + int codek, datak; + unsigned long tmp; + unsigned long len = memory_end - memory_start; + + high_memory = (void *)(memory_end & PAGE_MASK); + + /* this will put all memory onto the freelists */ + totalram_pages = free_all_bootmem(); + + codek = (_etext - _stext) >> 10; + datak = (_end - _sdata) >> 10; + + tmp = nr_free_pages() << PAGE_SHIFT; + printk(KERN_INFO "Memory: %luk/%luk RAM (%dk kernel code, %dk data)\n", + tmp >> 10, len >> 10, codek, datak); +} + +#ifdef CONFIG_BLK_DEV_INITRD +void __init free_initrd_mem(unsigned long start, unsigned long end) +{ + int pages = 0; + for (; start < end; start += PAGE_SIZE) { + ClearPageReserved(virt_to_page(start)); + init_page_count(virt_to_page(start)); + free_page(start); + totalram_pages++; + pages++; + } + printk(KERN_INFO "Freeing initrd memory: %luk freed\n", + (pages * PAGE_SIZE) >> 10); +} +#endif + +void __init free_initmem(void) +{ + unsigned long addr; + + /* + * The following code should be cool even if these sections + * are not page aligned. + */ + addr = PAGE_ALIGN((unsigned long)(__init_begin)); + + /* next to check that the page we free is not a partial page */ + for (; addr + PAGE_SIZE < (unsigned long)(__init_end); + addr += PAGE_SIZE) { + ClearPageReserved(virt_to_page(addr)); + init_page_count(virt_to_page(addr)); + free_page(addr); + totalram_pages++; + } + printk(KERN_INFO "Freeing unused kernel memory: %dK freed\n", + (int) ((addr - PAGE_ALIGN((long) &__init_begin)) >> 10)); +} diff --git a/arch/c6x/platforms/Kconfig b/arch/c6x/platforms/Kconfig new file mode 100644 index 0000000..401ee67 --- /dev/null +++ b/arch/c6x/platforms/Kconfig @@ -0,0 +1,16 @@ + +config SOC_TMS320C6455 + bool "TMS320C6455" + default n + +config SOC_TMS320C6457 + bool "TMS320C6457" + default n + +config SOC_TMS320C6472 + bool "TMS320C6472" + default n + +config SOC_TMS320C6474 + bool "TMS320C6474" + default n diff --git a/arch/c6x/platforms/Makefile b/arch/c6x/platforms/Makefile new file mode 100644 index 0000000..9a95b9b --- /dev/null +++ b/arch/c6x/platforms/Makefile @@ -0,0 +1,12 @@ +# +# Makefile for arch/c6x/platforms +# +# Copyright 2010, 2011 Texas Instruments Incorporated +# + +obj-y = platform.o cache.o megamod-pic.o pll.o plldata.o timer64.o +obj-y += dscr.o + +# SoC objects +obj-$(CONFIG_SOC_TMS320C6455) += emif.o +obj-$(CONFIG_SOC_TMS320C6457) += emif.o diff --git a/arch/c6x/platforms/cache.c b/arch/c6x/platforms/cache.c new file mode 100644 index 0000000..86318a1 --- /dev/null +++ b/arch/c6x/platforms/cache.c @@ -0,0 +1,445 @@ +/* + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/io.h> + +#include <asm/cache.h> +#include <asm/soc.h> + +/* + * Internal Memory Control Registers for caches + */ +#define IMCR_CCFG 0x0000 +#define IMCR_L1PCFG 0x0020 +#define IMCR_L1PCC 0x0024 +#define IMCR_L1DCFG 0x0040 +#define IMCR_L1DCC 0x0044 +#define IMCR_L2ALLOC0 0x2000 +#define IMCR_L2ALLOC1 0x2004 +#define IMCR_L2ALLOC2 0x2008 +#define IMCR_L2ALLOC3 0x200c +#define IMCR_L2WBAR 0x4000 +#define IMCR_L2WWC 0x4004 +#define IMCR_L2WIBAR 0x4010 +#define IMCR_L2WIWC 0x4014 +#define IMCR_L2IBAR 0x4018 +#define IMCR_L2IWC 0x401c +#define IMCR_L1PIBAR 0x4020 +#define IMCR_L1PIWC 0x4024 +#define IMCR_L1DWIBAR 0x4030 +#define IMCR_L1DWIWC 0x4034 +#define IMCR_L1DWBAR 0x4040 +#define IMCR_L1DWWC 0x4044 +#define IMCR_L1DIBAR 0x4048 +#define IMCR_L1DIWC 0x404c +#define IMCR_L2WB 0x5000 +#define IMCR_L2WBINV 0x5004 +#define IMCR_L2INV 0x5008 +#define IMCR_L1PINV 0x5028 +#define IMCR_L1DWB 0x5040 +#define IMCR_L1DWBINV 0x5044 +#define IMCR_L1DINV 0x5048 +#define IMCR_MAR_BASE 0x8000 +#define IMCR_MAR96_111 0x8180 +#define IMCR_MAR128_191 0x8200 +#define IMCR_MAR224_239 0x8380 +#define IMCR_L2MPFAR 0xa000 +#define IMCR_L2MPFSR 0xa004 +#define IMCR_L2MPFCR 0xa008 +#define IMCR_L2MPLK0 0xa100 +#define IMCR_L2MPLK1 0xa104 +#define IMCR_L2MPLK2 0xa108 +#define IMCR_L2MPLK3 0xa10c +#define IMCR_L2MPLKCMD 0xa110 +#define IMCR_L2MPLKSTAT 0xa114 +#define IMCR_L2MPPA_BASE 0xa200 +#define IMCR_L1PMPFAR 0xa400 +#define IMCR_L1PMPFSR 0xa404 +#define IMCR_L1PMPFCR 0xa408 +#define IMCR_L1PMPLK0 0xa500 +#define IMCR_L1PMPLK1 0xa504 +#define IMCR_L1PMPLK2 0xa508 +#define IMCR_L1PMPLK3 0xa50c +#define IMCR_L1PMPLKCMD 0xa510 +#define IMCR_L1PMPLKSTAT 0xa514 +#define IMCR_L1PMPPA_BASE 0xa600 +#define IMCR_L1DMPFAR 0xac00 +#define IMCR_L1DMPFSR 0xac04 +#define IMCR_L1DMPFCR 0xac08 +#define IMCR_L1DMPLK0 0xad00 +#define IMCR_L1DMPLK1 0xad04 +#define IMCR_L1DMPLK2 0xad08 +#define IMCR_L1DMPLK3 0xad0c +#define IMCR_L1DMPLKCMD 0xad10 +#define IMCR_L1DMPLKSTAT 0xad14 +#define IMCR_L1DMPPA_BASE 0xae00 +#define IMCR_L2PDWAKE0 0xc040 +#define IMCR_L2PDWAKE1 0xc044 +#define IMCR_L2PDSLEEP0 0xc050 +#define IMCR_L2PDSLEEP1 0xc054 +#define IMCR_L2PDSTAT0 0xc060 +#define IMCR_L2PDSTAT1 0xc064 + +/* + * CCFG register values and bits + */ +#define L2MODE_0K_CACHE 0x0 +#define L2MODE_32K_CACHE 0x1 +#define L2MODE_64K_CACHE 0x2 +#define L2MODE_128K_CACHE 0x3 +#define L2MODE_256K_CACHE 0x7 + +#define L2PRIO_URGENT 0x0 +#define L2PRIO_HIGH 0x1 +#define L2PRIO_MEDIUM 0x2 +#define L2PRIO_LOW 0x3 + +#define CCFG_ID 0x100 /* Invalidate L1P bit */ +#define CCFG_IP 0x200 /* Invalidate L1D bit */ + +static void __iomem *cache_base; + +/* + * L1 & L2 caches generic functions + */ +#define imcr_get(reg) soc_readl(cache_base + (reg)) +#define imcr_set(reg, value) \ +do { \ + soc_writel((value), cache_base + (reg)); \ + soc_readl(cache_base + (reg)); \ +} while (0) + +static void cache_block_operation_wait(unsigned int wc_reg) +{ + /* Wait for completion */ + while (imcr_get(wc_reg)) + cpu_relax(); +} + +static DEFINE_SPINLOCK(cache_lock); + +/* + * Generic function to perform a block cache operation as + * invalidate or writeback/invalidate + */ +static void cache_block_operation(unsigned int *start, + unsigned int *end, + unsigned int bar_reg, + unsigned int wc_reg) +{ + unsigned long flags; + unsigned int wcnt = + (L2_CACHE_ALIGN_CNT((unsigned int) end) + - L2_CACHE_ALIGN_LOW((unsigned int) start)) >> 2; + unsigned int wc = 0; + + for (; wcnt; wcnt -= wc, start += wc) { +loop: + spin_lock_irqsave(&cache_lock, flags); + + /* + * If another cache operation is occuring + */ + if (unlikely(imcr_get(wc_reg))) { + spin_unlock_irqrestore(&cache_lock, flags); + + /* Wait for previous operation completion */ + cache_block_operation_wait(wc_reg); + + /* Try again */ + goto loop; + } + + imcr_set(bar_reg, L2_CACHE_ALIGN_LOW((unsigned int) start)); + + if (wcnt > 0xffff) + wc = 0xffff; + else + wc = wcnt; + + /* Set word count value in the WC register */ + imcr_set(wc_reg, wc & 0xffff); + + spin_unlock_irqrestore(&cache_lock, flags); + + /* Wait for completion */ + cache_block_operation_wait(wc_reg); + } +} + +static void cache_block_operation_nowait(unsigned int *start, + unsigned int *end, + unsigned int bar_reg, + unsigned int wc_reg) +{ + unsigned long flags; + unsigned int wcnt = + (L2_CACHE_ALIGN_CNT((unsigned int) end) + - L2_CACHE_ALIGN_LOW((unsigned int) start)) >> 2; + unsigned int wc = 0; + + for (; wcnt; wcnt -= wc, start += wc) { + + spin_lock_irqsave(&cache_lock, flags); + + imcr_set(bar_reg, L2_CACHE_ALIGN_LOW((unsigned int) start)); + + if (wcnt > 0xffff) + wc = 0xffff; + else + wc = wcnt; + + /* Set word count value in the WC register */ + imcr_set(wc_reg, wc & 0xffff); + + spin_unlock_irqrestore(&cache_lock, flags); + + /* Don't wait for completion on last cache operation */ + if (wcnt > 0xffff) + cache_block_operation_wait(wc_reg); + } +} + +/* + * L1 caches management + */ + +/* + * Disable L1 caches + */ +void L1_cache_off(void) +{ + unsigned int dummy; + + imcr_set(IMCR_L1PCFG, 0); + dummy = imcr_get(IMCR_L1PCFG); + + imcr_set(IMCR_L1DCFG, 0); + dummy = imcr_get(IMCR_L1DCFG); +} + +/* + * Enable L1 caches + */ +void L1_cache_on(void) +{ + unsigned int dummy; + + imcr_set(IMCR_L1PCFG, 7); + dummy = imcr_get(IMCR_L1PCFG); + + imcr_set(IMCR_L1DCFG, 7); + dummy = imcr_get(IMCR_L1DCFG); +} + +/* + * L1P global-invalidate all + */ +void L1P_cache_global_invalidate(void) +{ + unsigned int set = 1; + imcr_set(IMCR_L1PINV, set); + while (imcr_get(IMCR_L1PINV) & 1) + cpu_relax(); +} + +/* + * L1D global-invalidate all + * + * Warning: this operation causes all updated data in L1D to + * be discarded rather than written back to the lower levels of + * memory + */ +void L1D_cache_global_invalidate(void) +{ + unsigned int set = 1; + imcr_set(IMCR_L1DINV, set); + while (imcr_get(IMCR_L1DINV) & 1) + cpu_relax(); +} + +void L1D_cache_global_writeback(void) +{ + unsigned int set = 1; + imcr_set(IMCR_L1DWB, set); + while (imcr_get(IMCR_L1DWB) & 1) + cpu_relax(); +} + +void L1D_cache_global_writeback_invalidate(void) +{ + unsigned int set = 1; + imcr_set(IMCR_L1DWBINV, set); + while (imcr_get(IMCR_L1DWBINV) & 1) + cpu_relax(); +} + +/* + * L2 caches management + */ + +/* + * Set L2 operation mode + */ +void L2_cache_set_mode(unsigned int mode) +{ + unsigned int ccfg = imcr_get(IMCR_CCFG); + + /* Clear and set the L2MODE bits in CCFG */ + ccfg &= ~7; + ccfg |= (mode & 7); + imcr_set(IMCR_CCFG, ccfg); + ccfg = imcr_get(IMCR_CCFG); +} + +/* + * L2 global-writeback and global-invalidate all + */ +void L2_cache_global_writeback_invalidate(void) +{ + imcr_set(IMCR_L2WBINV, 1); + while (imcr_get(IMCR_L2WBINV)) + cpu_relax(); +} + +/* + * L2 global-writeback all + */ +void L2_cache_global_writeback(void) +{ + imcr_set(IMCR_L2WB, 1); + while (imcr_get(IMCR_L2WB)) + cpu_relax(); +} + +/* + * Cacheability controls + */ +void enable_caching(unsigned long start, unsigned long end) +{ + unsigned int mar = IMCR_MAR_BASE + ((start >> 24) << 2); + unsigned int mar_e = IMCR_MAR_BASE + ((end >> 24) << 2); + + for (; mar <= mar_e; mar += 4) + imcr_set(mar, imcr_get(mar) | 1); +} + +void disable_caching(unsigned long start, unsigned long end) +{ + unsigned int mar = IMCR_MAR_BASE + ((start >> 24) << 2); + unsigned int mar_e = IMCR_MAR_BASE + ((end >> 24) << 2); + + for (; mar <= mar_e; mar += 4) + imcr_set(mar, imcr_get(mar) & ~1); +} + + +/* + * L1 block operations + */ +void L1P_cache_block_invalidate(unsigned int start, unsigned int end) +{ + cache_block_operation((unsigned int *) start, + (unsigned int *) end, + IMCR_L1PIBAR, IMCR_L1PIWC); +} + +void L1D_cache_block_invalidate(unsigned int start, unsigned int end) +{ + cache_block_operation((unsigned int *) start, + (unsigned int *) end, + IMCR_L1DIBAR, IMCR_L1DIWC); +} + +void L1D_cache_block_writeback_invalidate(unsigned int start, unsigned int end) +{ + cache_block_operation((unsigned int *) start, + (unsigned int *) end, + IMCR_L1DWIBAR, IMCR_L1DWIWC); +} + +void L1D_cache_block_writeback(unsigned int start, unsigned int end) +{ + cache_block_operation((unsigned int *) start, + (unsigned int *) end, + IMCR_L1DWBAR, IMCR_L1DWWC); +} + +/* + * L2 block operations + */ +void L2_cache_block_invalidate(unsigned int start, unsigned int end) +{ + cache_block_operation((unsigned int *) start, + (unsigned int *) end, + IMCR_L2IBAR, IMCR_L2IWC); +} + +void L2_cache_block_writeback(unsigned int start, unsigned int end) +{ + cache_block_operation((unsigned int *) start, + (unsigned int *) end, + IMCR_L2WBAR, IMCR_L2WWC); +} + +void L2_cache_block_writeback_invalidate(unsigned int start, unsigned int end) +{ + cache_block_operation((unsigned int *) start, + (unsigned int *) end, + IMCR_L2WIBAR, IMCR_L2WIWC); +} + +void L2_cache_block_invalidate_nowait(unsigned int start, unsigned int end) +{ + cache_block_operation_nowait((unsigned int *) start, + (unsigned int *) end, + IMCR_L2IBAR, IMCR_L2IWC); +} + +void L2_cache_block_writeback_nowait(unsigned int start, unsigned int end) +{ + cache_block_operation_nowait((unsigned int *) start, + (unsigned int *) end, + IMCR_L2WBAR, IMCR_L2WWC); +} + +void L2_cache_block_writeback_invalidate_nowait(unsigned int start, + unsigned int end) +{ + cache_block_operation_nowait((unsigned int *) start, + (unsigned int *) end, + IMCR_L2WIBAR, IMCR_L2WIWC); +} + + +/* + * L1 and L2 caches configuration + */ +void __init c6x_cache_init(void) +{ + struct device_node *node; + + node = of_find_compatible_node(NULL, NULL, "ti,c64x+cache"); + if (!node) + return; + + cache_base = of_iomap(node, 0); + + of_node_put(node); + + if (!cache_base) + return; + + /* Set L2 caches on the the whole L2 SRAM memory */ + L2_cache_set_mode(L2MODE_SIZE); + + /* Enable L1 */ + L1_cache_on(); +} diff --git a/arch/c6x/platforms/dscr.c b/arch/c6x/platforms/dscr.c new file mode 100644 index 0000000..f848a65 --- /dev/null +++ b/arch/c6x/platforms/dscr.c @@ -0,0 +1,598 @@ +/* + * Device State Control Registers driver + * + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* + * The Device State Control Registers (DSCR) provide SoC level control over + * a number of peripherals. Details vary considerably among the various SoC + * parts. In general, the DSCR block will provide one or more configuration + * registers often protected by a lock register. One or more key values must + * be written to a lock register in order to unlock the configuration register. + * The configuration register may be used to enable (and disable in some + * cases) SoC pin drivers, peripheral clock sources (internal or pin), etc. + * In some cases, a configuration register is write once or the individual + * bits are write once. That is, you may be able to enable a device, but + * will not be able to disable it. + * + * In addition to device configuration, the DSCR block may provide registers + * which are used to reset SoC peripherals, provide device ID information, + * provide MAC addresses, and other miscellaneous functions. + */ + +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <asm/soc.h> +#include <asm/dscr.h> + +#define MAX_DEVSTATE_IDS 32 +#define MAX_DEVCTL_REGS 8 +#define MAX_DEVSTAT_REGS 8 +#define MAX_LOCKED_REGS 4 +#define MAX_SOC_EMACS 2 + +struct rmii_reset_reg { + u32 reg; + u32 mask; +}; + +/* + * Some registerd may be locked. In order to write to these + * registers, the key value must first be written to the lockreg. + */ +struct locked_reg { + u32 reg; /* offset from base */ + u32 lockreg; /* offset from base */ + u32 key; /* unlock key */ +}; + +/* + * This describes a contiguous area of like control bits used to enable/disable + * SoC devices. Each controllable device is given an ID which is used by the + * individual device drivers to control the device state. These IDs start at + * zero and are assigned sequentially to the control bitfield ranges described + * by this structure. + */ +struct devstate_ctl_reg { + u32 reg; /* register holding the control bits */ + u8 start_id; /* start id of this range */ + u8 num_ids; /* number of devices in this range */ + u8 enable_only; /* bits are write-once to enable only */ + u8 enable; /* value used to enable device */ + u8 disable; /* value used to disable device */ + u8 shift; /* starting (rightmost) bit in range */ + u8 nbits; /* number of bits per device */ +}; + + +/* + * This describes a region of status bits indicating the state of + * various devices. This is used internally to wait for status + * change completion when enabling/disabling a device. Status is + * optional and not all device controls will have a corresponding + * status. + */ +struct devstate_stat_reg { + u32 reg; /* register holding the status bits */ + u8 start_id; /* start id of this range */ + u8 num_ids; /* number of devices in this range */ + u8 enable; /* value indicating enabled state */ + u8 disable; /* value indicating disabled state */ + u8 shift; /* starting (rightmost) bit in range */ + u8 nbits; /* number of bits per device */ +}; + +struct devstate_info { + struct devstate_ctl_reg *ctl; + struct devstate_stat_reg *stat; +}; + +/* These are callbacks to SOC-specific code. */ +struct dscr_ops { + void (*init)(struct device_node *node); +}; + +struct dscr_regs { + spinlock_t lock; + void __iomem *base; + u32 kick_reg[2]; + u32 kick_key[2]; + struct locked_reg locked[MAX_LOCKED_REGS]; + struct devstate_info devstate_info[MAX_DEVSTATE_IDS]; + struct rmii_reset_reg rmii_resets[MAX_SOC_EMACS]; + struct devstate_ctl_reg devctl[MAX_DEVCTL_REGS]; + struct devstate_stat_reg devstat[MAX_DEVSTAT_REGS]; +}; + +static struct dscr_regs dscr; + +static struct locked_reg *find_locked_reg(u32 reg) +{ + int i; + + for (i = 0; i < MAX_LOCKED_REGS; i++) + if (dscr.locked[i].key && reg == dscr.locked[i].reg) + return &dscr.locked[i]; + return NULL; +} + +/* + * Write to a register with one lock + */ +static void dscr_write_locked1(u32 reg, u32 val, + u32 lock, u32 key) +{ + void __iomem *reg_addr = dscr.base + reg; + void __iomem *lock_addr = dscr.base + lock; + + /* + * For some registers, the lock is relocked after a short number + * of cycles. We have to put the lock write and register write in + * the same fetch packet to meet this timing. The .align ensures + * the two stw instructions are in the same fetch packet. + */ + asm volatile ("b .s2 0f\n" + "nop 5\n" + " .align 5\n" + "0:\n" + "stw .D1T2 %3,*%2\n" + "stw .D1T2 %1,*%0\n" + : + : "a"(reg_addr), "b"(val), "a"(lock_addr), "b"(key) + ); + + /* in case the hw doesn't reset the lock */ + soc_writel(0, lock_addr); +} + +/* + * Write to a register protected by two lock registers + */ +static void dscr_write_locked2(u32 reg, u32 val, + u32 lock0, u32 key0, + u32 lock1, u32 key1) +{ + soc_writel(key0, dscr.base + lock0); + soc_writel(key1, dscr.base + lock1); + soc_writel(val, dscr.base + reg); + soc_writel(0, dscr.base + lock0); + soc_writel(0, dscr.base + lock1); +} + +static void dscr_write(u32 reg, u32 val) +{ + struct locked_reg *lock; + + lock = find_locked_reg(reg); + if (lock) + dscr_write_locked1(reg, val, lock->lockreg, lock->key); + else if (dscr.kick_key[0]) + dscr_write_locked2(reg, val, dscr.kick_reg[0], dscr.kick_key[0], + dscr.kick_reg[1], dscr.kick_key[1]); + else + soc_writel(val, dscr.base + reg); +} + + +/* + * Drivers can use this interface to enable/disable SoC IP blocks. + */ +void dscr_set_devstate(int id, enum dscr_devstate_t state) +{ + struct devstate_ctl_reg *ctl; + struct devstate_stat_reg *stat; + struct devstate_info *info; + u32 ctl_val, val; + int ctl_shift, ctl_mask; + unsigned long flags; + + if (!dscr.base) + return; + + if (id < 0 || id >= MAX_DEVSTATE_IDS) + return; + + info = &dscr.devstate_info[id]; + ctl = info->ctl; + stat = info->stat; + + if (ctl == NULL) + return; + + ctl_shift = ctl->shift + ctl->nbits * (id - ctl->start_id); + ctl_mask = ((1 << ctl->nbits) - 1) << ctl_shift; + + switch (state) { + case DSCR_DEVSTATE_ENABLED: + ctl_val = ctl->enable << ctl_shift; + break; + case DSCR_DEVSTATE_DISABLED: + if (ctl->enable_only) + return; + ctl_val = ctl->disable << ctl_shift; + break; + default: + return; + } + + spin_lock_irqsave(&dscr.lock, flags); + + val = soc_readl(dscr.base + ctl->reg); + val &= ~ctl_mask; + val |= ctl_val; + + dscr_write(ctl->reg, val); + + spin_unlock_irqrestore(&dscr.lock, flags); + + if (!stat) + return; + + ctl_shift = stat->shift + stat->nbits * (id - stat->start_id); + + if (state == DSCR_DEVSTATE_ENABLED) + ctl_val = stat->enable; + else + ctl_val = stat->disable; + + do { + val = soc_readl(dscr.base + stat->reg); + val >>= ctl_shift; + val &= ((1 << stat->nbits) - 1); + } while (val != ctl_val); +} +EXPORT_SYMBOL(dscr_set_devstate); + +/* + * Drivers can use this to reset RMII module. + */ +void dscr_rmii_reset(int id, int assert) +{ + struct rmii_reset_reg *r; + unsigned long flags; + u32 val; + + if (id < 0 || id >= MAX_SOC_EMACS) + return; + + r = &dscr.rmii_resets[id]; + if (r->mask == 0) + return; + + spin_lock_irqsave(&dscr.lock, flags); + + val = soc_readl(dscr.base + r->reg); + if (assert) + dscr_write(r->reg, val | r->mask); + else + dscr_write(r->reg, val & ~(r->mask)); + + spin_unlock_irqrestore(&dscr.lock, flags); +} +EXPORT_SYMBOL(dscr_rmii_reset); + +static void __init dscr_parse_devstat(struct device_node *node, + void __iomem *base) +{ + u32 val; + int err; + + err = of_property_read_u32_array(node, "ti,dscr-devstat", &val, 1); + if (!err) + c6x_devstat = soc_readl(base + val); + printk(KERN_INFO "DEVSTAT: %08x\n", c6x_devstat); +} + +static void __init dscr_parse_silicon_rev(struct device_node *node, + void __iomem *base) +{ + u32 vals[3]; + int err; + + err = of_property_read_u32_array(node, "ti,dscr-silicon-rev", vals, 3); + if (!err) { + c6x_silicon_rev = soc_readl(base + vals[0]); + c6x_silicon_rev >>= vals[1]; + c6x_silicon_rev &= vals[2]; + } +} + +/* + * Some SoCs will have a pair of fuse registers which hold + * an ethernet MAC address. The "ti,dscr-mac-fuse-regs" + * property is a mapping from fuse register bytes to MAC + * address bytes. The expected format is: + * + * ti,dscr-mac-fuse-regs = <reg0 b3 b2 b1 b0 + * reg1 b3 b2 b1 b0> + * + * reg0 and reg1 are the offsets of the two fuse registers. + * b3-b0 positionally represent bytes within the fuse register. + * b3 is the most significant byte and b0 is the least. + * Allowable values for b3-b0 are: + * + * 0 = fuse register byte not used in MAC address + * 1-6 = index+1 into c6x_fuse_mac[] + */ +static void __init dscr_parse_mac_fuse(struct device_node *node, + void __iomem *base) +{ + u32 vals[10], fuse; + int f, i, j, err; + + err = of_property_read_u32_array(node, "ti,dscr-mac-fuse-regs", + vals, 10); + if (err) + return; + + for (f = 0; f < 2; f++) { + fuse = soc_readl(base + vals[f * 5]); + for (j = (f * 5) + 1, i = 24; i >= 0; i -= 8, j++) + if (vals[j] && vals[j] <= 6) + c6x_fuse_mac[vals[j] - 1] = fuse >> i; + } +} + +static void __init dscr_parse_rmii_resets(struct device_node *node, + void __iomem *base) +{ + const __be32 *p; + int i, size; + + /* look for RMII reset registers */ + p = of_get_property(node, "ti,dscr-rmii-resets", &size); + if (p) { + /* parse all the reg/mask pairs we can handle */ + size /= (sizeof(*p) * 2); + if (size > MAX_SOC_EMACS) + size = MAX_SOC_EMACS; + + for (i = 0; i < size; i++) { + dscr.rmii_resets[i].reg = be32_to_cpup(p++); + dscr.rmii_resets[i].mask = be32_to_cpup(p++); + } + } +} + + +static void __init dscr_parse_privperm(struct device_node *node, + void __iomem *base) +{ + u32 vals[2]; + int err; + + err = of_property_read_u32_array(node, "ti,dscr-privperm", vals, 2); + if (err) + return; + dscr_write(vals[0], vals[1]); +} + +/* + * SoCs may have "locked" DSCR registers which can only be written + * to only after writing a key value to a lock registers. These + * regisers can be described with the "ti,dscr-locked-regs" property. + * This property provides a list of register descriptions with each + * description consisting of three values. + * + * ti,dscr-locked-regs = <reg0 lockreg0 key0 + * ... + * regN lockregN keyN>; + * + * reg is the offset of the locked register + * lockreg is the offset of the lock register + * key is the unlock key written to lockreg + * + */ +static void __init dscr_parse_locked_regs(struct device_node *node, + void __iomem *base) +{ + struct locked_reg *r; + const __be32 *p; + int i, size; + + p = of_get_property(node, "ti,dscr-locked-regs", &size); + if (p) { + /* parse all the register descriptions we can handle */ + size /= (sizeof(*p) * 3); + if (size > MAX_LOCKED_REGS) + size = MAX_LOCKED_REGS; + + for (i = 0; i < size; i++) { + r = &dscr.locked[i]; + + r->reg = be32_to_cpup(p++); + r->lockreg = be32_to_cpup(p++); + r->key = be32_to_cpup(p++); + } + } +} + +/* + * SoCs may have DSCR registers which are only write enabled after + * writing specific key values to two registers. The two key registers + * and the key values can be parsed from a "ti,dscr-kick-regs" + * propety with the following layout: + * + * ti,dscr-kick-regs = <kickreg0 key0 kickreg1 key1> + * + * kickreg is the offset of the "kick" register + * key is the value which unlocks writing for protected regs + */ +static void __init dscr_parse_kick_regs(struct device_node *node, + void __iomem *base) +{ + u32 vals[4]; + int err; + + err = of_property_read_u32_array(node, "ti,dscr-kick-regs", vals, 4); + if (!err) { + dscr.kick_reg[0] = vals[0]; + dscr.kick_key[0] = vals[1]; + dscr.kick_reg[1] = vals[2]; + dscr.kick_key[1] = vals[3]; + } +} + + +/* + * SoCs may provide controls to enable/disable individual IP blocks. These + * controls in the DSCR usually control pin drivers but also may control + * clocking and or resets. The device tree is used to describe the bitfields + * in registers used to control device state. The number of bits and their + * values may vary even within the same register. + * + * The layout of these bitfields is described by the ti,dscr-devstate-ctl-regs + * property. This property is a list where each element describes a contiguous + * range of control fields with like properties. Each element of the list + * consists of 7 cells with the following values: + * + * start_id num_ids reg enable disable start_bit nbits + * + * start_id is device id for the first device control in the range + * num_ids is the number of device controls in the range + * reg is the offset of the register holding the control bits + * enable is the value to enable a device + * disable is the value to disable a device (0xffffffff if cannot disable) + * start_bit is the bit number of the first bit in the range + * nbits is the number of bits per device control + */ +static void __init dscr_parse_devstate_ctl_regs(struct device_node *node, + void __iomem *base) +{ + struct devstate_ctl_reg *r; + const __be32 *p; + int i, j, size; + + p = of_get_property(node, "ti,dscr-devstate-ctl-regs", &size); + if (p) { + /* parse all the ranges we can handle */ + size /= (sizeof(*p) * 7); + if (size > MAX_DEVCTL_REGS) + size = MAX_DEVCTL_REGS; + + for (i = 0; i < size; i++) { + r = &dscr.devctl[i]; + + r->start_id = be32_to_cpup(p++); + r->num_ids = be32_to_cpup(p++); + r->reg = be32_to_cpup(p++); + r->enable = be32_to_cpup(p++); + r->disable = be32_to_cpup(p++); + if (r->disable == 0xffffffff) + r->enable_only = 1; + r->shift = be32_to_cpup(p++); + r->nbits = be32_to_cpup(p++); + + for (j = r->start_id; + j < (r->start_id + r->num_ids); + j++) + dscr.devstate_info[j].ctl = r; + } + } +} + +/* + * SoCs may provide status registers indicating the state (enabled/disabled) of + * devices on the SoC. The device tree is used to describe the bitfields in + * registers used to provide device status. The number of bits and their + * values used to provide status may vary even within the same register. + * + * The layout of these bitfields is described by the ti,dscr-devstate-stat-regs + * property. This property is a list where each element describes a contiguous + * range of status fields with like properties. Each element of the list + * consists of 7 cells with the following values: + * + * start_id num_ids reg enable disable start_bit nbits + * + * start_id is device id for the first device status in the range + * num_ids is the number of devices covered by the range + * reg is the offset of the register holding the status bits + * enable is the value indicating device is enabled + * disable is the value indicating device is disabled + * start_bit is the bit number of the first bit in the range + * nbits is the number of bits per device status + */ +static void __init dscr_parse_devstate_stat_regs(struct device_node *node, + void __iomem *base) +{ + struct devstate_stat_reg *r; + const __be32 *p; + int i, j, size; + + p = of_get_property(node, "ti,dscr-devstate-stat-regs", &size); + if (p) { + /* parse all the ranges we can handle */ + size /= (sizeof(*p) * 7); + if (size > MAX_DEVSTAT_REGS) + size = MAX_DEVSTAT_REGS; + + for (i = 0; i < size; i++) { + r = &dscr.devstat[i]; + + r->start_id = be32_to_cpup(p++); + r->num_ids = be32_to_cpup(p++); + r->reg = be32_to_cpup(p++); + r->enable = be32_to_cpup(p++); + r->disable = be32_to_cpup(p++); + r->shift = be32_to_cpup(p++); + r->nbits = be32_to_cpup(p++); + + for (j = r->start_id; + j < (r->start_id + r->num_ids); + j++) + dscr.devstate_info[j].stat = r; + } + } +} + +static struct of_device_id dscr_ids[] __initdata = { + { .compatible = "ti,c64x+dscr" }, + {} +}; + +/* + * Probe for DSCR area. + * + * This has to be done early on in case timer or interrupt controller + * needs something. e.g. On C6455 SoC, timer must be enabled through + * DSCR before it is functional. + */ +void __init dscr_probe(void) +{ + struct device_node *node; + void __iomem *base; + + spin_lock_init(&dscr.lock); + + node = of_find_matching_node(NULL, dscr_ids); + if (!node) + return; + + base = of_iomap(node, 0); + if (!base) { + of_node_put(node); + return; + } + + dscr.base = base; + + dscr_parse_devstat(node, base); + dscr_parse_silicon_rev(node, base); + dscr_parse_mac_fuse(node, base); + dscr_parse_rmii_resets(node, base); + dscr_parse_locked_regs(node, base); + dscr_parse_kick_regs(node, base); + dscr_parse_devstate_ctl_regs(node, base); + dscr_parse_devstate_stat_regs(node, base); + dscr_parse_privperm(node, base); +} diff --git a/arch/c6x/platforms/emif.c b/arch/c6x/platforms/emif.c new file mode 100644 index 0000000..8b564de --- /dev/null +++ b/arch/c6x/platforms/emif.c @@ -0,0 +1,87 @@ +/* + * External Memory Interface + * + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/io.h> +#include <asm/soc.h> +#include <asm/dscr.h> + +#define NUM_EMIFA_CHIP_ENABLES 4 + +struct emifa_regs { + u32 midr; + u32 stat; + u32 reserved1[6]; + u32 bprio; + u32 reserved2[23]; + u32 cecfg[NUM_EMIFA_CHIP_ENABLES]; + u32 reserved3[4]; + u32 awcc; + u32 reserved4[7]; + u32 intraw; + u32 intmsk; + u32 intmskset; + u32 intmskclr; +}; + +static struct of_device_id emifa_match[] __initdata = { + { .compatible = "ti,c64x+emifa" }, + {} +}; + +/* + * Parse device tree for existence of an EMIF (External Memory Interface) + * and initialize it if found. + */ +static int __init c6x_emifa_init(void) +{ + struct emifa_regs __iomem *regs; + struct device_node *node; + const __be32 *p; + u32 val; + int i, len, err; + + node = of_find_matching_node(NULL, emifa_match); + if (!node) + return 0; + + regs = of_iomap(node, 0); + if (!regs) + return 0; + + /* look for a dscr-based enable for emifa pin buffers */ + err = of_property_read_u32_array(node, "ti,dscr-dev-enable", &val, 1); + if (!err) + dscr_set_devstate(val, DSCR_DEVSTATE_ENABLED); + + /* set up the chip enables */ + p = of_get_property(node, "ti,emifa-ce-config", &len); + if (p) { + len /= sizeof(u32); + if (len > NUM_EMIFA_CHIP_ENABLES) + len = NUM_EMIFA_CHIP_ENABLES; + for (i = 0; i <= len; i++) + soc_writel(be32_to_cpup(&p[i]), ®s->cecfg[i]); + } + + err = of_property_read_u32_array(node, "ti,emifa-burst-priority", &val, 1); + if (!err) + soc_writel(val, ®s->bprio); + + err = of_property_read_u32_array(node, "ti,emifa-async-wait-control", &val, 1); + if (!err) + soc_writel(val, ®s->awcc); + + iounmap(regs); + of_node_put(node); + return 0; +} +pure_initcall(c6x_emifa_init); diff --git a/arch/c6x/platforms/megamod-pic.c b/arch/c6x/platforms/megamod-pic.c new file mode 100644 index 0000000..7c37a94 --- /dev/null +++ b/arch/c6x/platforms/megamod-pic.c @@ -0,0 +1,349 @@ +/* + * Support for C64x+ Megamodule Interrupt Controller + * + * Copyright (C) 2010, 2011 Texas Instruments Incorporated + * Contributed by: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> +#include <linux/slab.h> +#include <asm/soc.h> +#include <asm/megamod-pic.h> + +#define NR_COMBINERS 4 +#define NR_MUX_OUTPUTS 12 + +#define IRQ_UNMAPPED 0xffff + +/* + * Megamodule Interrupt Controller register layout + */ +struct megamod_regs { + u32 evtflag[8]; + u32 evtset[8]; + u32 evtclr[8]; + u32 reserved0[8]; + u32 evtmask[8]; + u32 mevtflag[8]; + u32 expmask[8]; + u32 mexpflag[8]; + u32 intmux_unused; + u32 intmux[7]; + u32 reserved1[8]; + u32 aegmux[2]; + u32 reserved2[14]; + u32 intxstat; + u32 intxclr; + u32 intdmask; + u32 reserved3[13]; + u32 evtasrt; +}; + +struct megamod_pic { + struct irq_host *irqhost; + struct megamod_regs __iomem *regs; + raw_spinlock_t lock; + + /* hw mux mapping */ + unsigned int output_to_irq[NR_MUX_OUTPUTS]; +}; + +static struct megamod_pic *mm_pic; + +struct megamod_cascade_data { + struct megamod_pic *pic; + int index; +}; + +static struct megamod_cascade_data cascade_data[NR_COMBINERS]; + +static void mask_megamod(struct irq_data *data) +{ + struct megamod_pic *pic = irq_data_get_irq_chip_data(data); + irq_hw_number_t src = irqd_to_hwirq(data); + u32 __iomem *evtmask = &pic->regs->evtmask[src / 32]; + + raw_spin_lock(&pic->lock); + soc_writel(soc_readl(evtmask) | (1 << (src & 31)), evtmask); + raw_spin_unlock(&pic->lock); +} + +static void unmask_megamod(struct irq_data *data) +{ + struct megamod_pic *pic = irq_data_get_irq_chip_data(data); + irq_hw_number_t src = irqd_to_hwirq(data); + u32 __iomem *evtmask = &pic->regs->evtmask[src / 32]; + + raw_spin_lock(&pic->lock); + soc_writel(soc_readl(evtmask) & ~(1 << (src & 31)), evtmask); + raw_spin_unlock(&pic->lock); +} + +static struct irq_chip megamod_chip = { + .name = "megamod", + .irq_mask = mask_megamod, + .irq_unmask = unmask_megamod, +}; + +static void megamod_irq_cascade(unsigned int irq, struct irq_desc *desc) +{ + struct megamod_cascade_data *cascade; + struct megamod_pic *pic; + u32 events; + int n, idx; + + cascade = irq_desc_get_handler_data(desc); + + pic = cascade->pic; + idx = cascade->index; + + while ((events = soc_readl(&pic->regs->mevtflag[idx])) != 0) { + n = __ffs(events); + + irq = irq_linear_revmap(pic->irqhost, idx * 32 + n); + + soc_writel(1 << n, &pic->regs->evtclr[idx]); + + generic_handle_irq(irq); + } +} + +static int megamod_map(struct irq_host *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct megamod_pic *pic = h->host_data; + int i; + + /* We shouldn't see a hwirq which is muxed to core controller */ + for (i = 0; i < NR_MUX_OUTPUTS; i++) + if (pic->output_to_irq[i] == hw) + return -1; + + irq_set_chip_data(virq, pic); + irq_set_chip_and_handler(virq, &megamod_chip, handle_level_irq); + + /* Set default irq type */ + irq_set_irq_type(virq, IRQ_TYPE_NONE); + + return 0; +} + +static int megamod_xlate(struct irq_host *h, struct device_node *ct, + const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_type) + +{ + /* megamod intspecs must have 1 cell */ + BUG_ON(intsize != 1); + *out_hwirq = intspec[0]; + *out_type = IRQ_TYPE_NONE; + return 0; +} + +static struct irq_host_ops megamod_host_ops = { + .map = megamod_map, + .xlate = megamod_xlate, +}; + +static void __init set_megamod_mux(struct megamod_pic *pic, int src, int output) +{ + int index, offset; + u32 val; + + if (src < 0 || src >= (NR_COMBINERS * 32)) { + pic->output_to_irq[output] = IRQ_UNMAPPED; + return; + } + + /* four mappings per mux register */ + index = output / 4; + offset = (output & 3) * 8; + + val = soc_readl(&pic->regs->intmux[index]); + val &= ~(0xff << offset); + val |= src << offset; + soc_writel(val, &pic->regs->intmux[index]); +} + +/* + * Parse the MUX mapping, if one exists. + * + * The MUX map is an array of up to 12 cells; one for each usable core priority + * interrupt. The value of a given cell is the megamodule interrupt source + * which is to me MUXed to the output corresponding to the cell position + * withing the array. The first cell in the array corresponds to priority + * 4 and the last (12th) cell corresponds to priority 15. The allowed + * values are 4 - ((NR_COMBINERS * 32) - 1). Note that the combined interrupt + * sources (0 - 3) are not allowed to be mapped through this property. They + * are handled through the "interrupts" property. This allows us to use a + * value of zero as a "do not map" placeholder. + */ +static void __init parse_priority_map(struct megamod_pic *pic, + int *mapping, int size) +{ + struct device_node *np = pic->irqhost->of_node; + const __be32 *map; + int i, maplen; + u32 val; + + map = of_get_property(np, "ti,c64x+megamod-pic-mux", &maplen); + if (map) { + maplen /= 4; + if (maplen > size) + maplen = size; + + for (i = 0; i < maplen; i++) { + val = be32_to_cpup(map); + if (val && val >= 4) + mapping[i] = val; + ++map; + } + } +} + +static struct megamod_pic * __init init_megamod_pic(struct device_node *np) +{ + struct megamod_pic *pic; + int i, irq; + int mapping[NR_MUX_OUTPUTS]; + + pr_info("Initializing C64x+ Megamodule PIC\n"); + + pic = kzalloc(sizeof(struct megamod_pic), GFP_KERNEL); + if (!pic) { + pr_err("%s: Could not alloc PIC structure.\n", np->full_name); + return NULL; + } + + pic->irqhost = irq_alloc_host(np, IRQ_HOST_MAP_LINEAR, + NR_COMBINERS * 32, &megamod_host_ops, + IRQ_UNMAPPED); + if (!pic->irqhost) { + pr_err("%s: Could not alloc host.\n", np->full_name); + goto error_free; + } + + pic->irqhost->host_data = pic; + + raw_spin_lock_init(&pic->lock); + + pic->regs = of_iomap(np, 0); + if (!pic->regs) { + pr_err("%s: Could not map registers.\n", np->full_name); + goto error_free; + } + + /* Initialize MUX map */ + for (i = 0; i < ARRAY_SIZE(mapping); i++) + mapping[i] = IRQ_UNMAPPED; + + parse_priority_map(pic, mapping, ARRAY_SIZE(mapping)); + + /* + * We can have up to 12 interrupts cascading to the core controller. + * These cascades can be from the combined interrupt sources or for + * individual interrupt sources. The "interrupts" property only + * deals with the cascaded combined interrupts. The individual + * interrupts muxed to the core controller use the core controller + * as their interrupt parent. + */ + for (i = 0; i < NR_COMBINERS; i++) { + + irq = irq_of_parse_and_map(np, i); + if (irq == NO_IRQ) + continue; + + /* + * We count on the core priority interrupts (4 - 15) being + * direct mapped. Check that device tree provided something + * in that range. + */ + if (irq < 4 || irq >= NR_PRIORITY_IRQS) { + pr_err("%s: combiner-%d virq %d out of range!\n", + np->full_name, i, irq); + continue; + } + + /* record the mapping */ + mapping[irq - 4] = i; + + pr_debug("%s: combiner-%d cascading to virq %d\n", + np->full_name, i, irq); + + cascade_data[i].pic = pic; + cascade_data[i].index = i; + + /* mask and clear all events in combiner */ + soc_writel(~0, &pic->regs->evtmask[i]); + soc_writel(~0, &pic->regs->evtclr[i]); + + irq_set_handler_data(irq, &cascade_data[i]); + irq_set_chained_handler(irq, megamod_irq_cascade); + } + + /* Finally, set up the MUX registers */ + for (i = 0; i < NR_MUX_OUTPUTS; i++) { + if (mapping[i] != IRQ_UNMAPPED) { + pr_debug("%s: setting mux %d to priority %d\n", + np->full_name, mapping[i], i + 4); + set_megamod_mux(pic, mapping[i], i); + } + } + + return pic; + +error_free: + kfree(pic); + + return NULL; +} + +/* + * Return next active event after ACK'ing it. + * Return -1 if no events active. + */ +static int get_exception(void) +{ + int i, bit; + u32 mask; + + for (i = 0; i < NR_COMBINERS; i++) { + mask = soc_readl(&mm_pic->regs->mexpflag[i]); + if (mask) { + bit = __ffs(mask); + soc_writel(1 << bit, &mm_pic->regs->evtclr[i]); + return (i * 32) + bit; + } + } + return -1; +} + +static void assert_event(unsigned int val) +{ + soc_writel(val, &mm_pic->regs->evtasrt); +} + +void __init megamod_pic_init(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "ti,c64x+megamod-pic"); + if (!np) + return; + + mm_pic = init_megamod_pic(np); + of_node_put(np); + + soc_ops.get_exception = get_exception; + soc_ops.assert_event = assert_event; + + return; +} diff --git a/arch/c6x/platforms/platform.c b/arch/c6x/platforms/platform.c new file mode 100644 index 0000000..26c1a35 --- /dev/null +++ b/arch/c6x/platforms/platform.c @@ -0,0 +1,17 @@ +/* + * Copyright 2011 Texas Instruments Incorporated + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#include <linux/init.h> +#include <linux/of_platform.h> + +static int __init c6x_device_probe(void) +{ + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); + return 0; +} +core_initcall(c6x_device_probe); diff --git a/arch/c6x/platforms/pll.c b/arch/c6x/platforms/pll.c new file mode 100644 index 0000000..3aa898f --- /dev/null +++ b/arch/c6x/platforms/pll.c @@ -0,0 +1,444 @@ +/* + * Clock and PLL control for C64x+ devices + * + * Copyright (C) 2010, 2011 Texas Instruments. + * Contributed by: Mark Salter <msalter@redhat.com> + * + * Copied heavily from arm/mach-davinci/clock.c, so: + * + * Copyright (C) 2006-2007 Texas Instruments. + * Copyright (C) 2008-2009 Deep Root Systems, LLC + * + * 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. + */ + +#include <linux/module.h> +#include <linux/clkdev.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/err.h> + +#include <asm/clock.h> +#include <asm/soc.h> + +static LIST_HEAD(clocks); +static DEFINE_MUTEX(clocks_mutex); +static DEFINE_SPINLOCK(clockfw_lock); + +static void __clk_enable(struct clk *clk) +{ + if (clk->parent) + __clk_enable(clk->parent); + clk->usecount++; +} + +static void __clk_disable(struct clk *clk) +{ + if (WARN_ON(clk->usecount == 0)) + return; + --clk->usecount; + + if (clk->parent) + __clk_disable(clk->parent); +} + +int clk_enable(struct clk *clk) +{ + unsigned long flags; + + if (clk == NULL || IS_ERR(clk)) + return -EINVAL; + + spin_lock_irqsave(&clockfw_lock, flags); + __clk_enable(clk); + spin_unlock_irqrestore(&clockfw_lock, flags); + + return 0; +} +EXPORT_SYMBOL(clk_enable); + +void clk_disable(struct clk *clk) +{ + unsigned long flags; + + if (clk == NULL || IS_ERR(clk)) + return; + + spin_lock_irqsave(&clockfw_lock, flags); + __clk_disable(clk); + spin_unlock_irqrestore(&clockfw_lock, flags); +} +EXPORT_SYMBOL(clk_disable); + +unsigned long clk_get_rate(struct clk *clk) +{ + if (clk == NULL || IS_ERR(clk)) + return -EINVAL; + + return clk->rate; +} +EXPORT_SYMBOL(clk_get_rate); + +long clk_round_rate(struct clk *clk, unsigned long rate) +{ + if (clk == NULL || IS_ERR(clk)) + return -EINVAL; + + if (clk->round_rate) + return clk->round_rate(clk, rate); + + return clk->rate; +} +EXPORT_SYMBOL(clk_round_rate); + +/* Propagate rate to children */ +static void propagate_rate(struct clk *root) +{ + struct clk *clk; + + list_for_each_entry(clk, &root->children, childnode) { + if (clk->recalc) + clk->rate = clk->recalc(clk); + propagate_rate(clk); + } +} + +int clk_set_rate(struct clk *clk, unsigned long rate) +{ + unsigned long flags; + int ret = -EINVAL; + + if (clk == NULL || IS_ERR(clk)) + return ret; + + if (clk->set_rate) + ret = clk->set_rate(clk, rate); + + spin_lock_irqsave(&clockfw_lock, flags); + if (ret == 0) { + if (clk->recalc) + clk->rate = clk->recalc(clk); + propagate_rate(clk); + } + spin_unlock_irqrestore(&clockfw_lock, flags); + + return ret; +} +EXPORT_SYMBOL(clk_set_rate); + +int clk_set_parent(struct clk *clk, struct clk *parent) +{ + unsigned long flags; + + if (clk == NULL || IS_ERR(clk)) + return -EINVAL; + + /* Cannot change parent on enabled clock */ + if (WARN_ON(clk->usecount)) + return -EINVAL; + + mutex_lock(&clocks_mutex); + clk->parent = parent; + list_del_init(&clk->childnode); + list_add(&clk->childnode, &clk->parent->children); + mutex_unlock(&clocks_mutex); + + spin_lock_irqsave(&clockfw_lock, flags); + if (clk->recalc) + clk->rate = clk->recalc(clk); + propagate_rate(clk); + spin_unlock_irqrestore(&clockfw_lock, flags); + + return 0; +} +EXPORT_SYMBOL(clk_set_parent); + +int clk_register(struct clk *clk) +{ + if (clk == NULL || IS_ERR(clk)) + return -EINVAL; + + if (WARN(clk->parent && !clk->parent->rate, + "CLK: %s parent %s has no rate!\n", + clk->name, clk->parent->name)) + return -EINVAL; + + mutex_lock(&clocks_mutex); + list_add_tail(&clk->node, &clocks); + if (clk->parent) + list_add_tail(&clk->childnode, &clk->parent->children); + mutex_unlock(&clocks_mutex); + + /* If rate is already set, use it */ + if (clk->rate) + return 0; + + /* Else, see if there is a way to calculate it */ + if (clk->recalc) + clk->rate = clk->recalc(clk); + + /* Otherwise, default to parent rate */ + else if (clk->parent) + clk->rate = clk->parent->rate; + + return 0; +} +EXPORT_SYMBOL(clk_register); + +void clk_unregister(struct clk *clk) +{ + if (clk == NULL || IS_ERR(clk)) + return; + + mutex_lock(&clocks_mutex); + list_del(&clk->node); + list_del(&clk->childnode); + mutex_unlock(&clocks_mutex); +} +EXPORT_SYMBOL(clk_unregister); + + +static u32 pll_read(struct pll_data *pll, int reg) +{ + return soc_readl(pll->base + reg); +} + +static unsigned long clk_sysclk_recalc(struct clk *clk) +{ + u32 v, plldiv = 0; + struct pll_data *pll; + unsigned long rate = clk->rate; + + if (WARN_ON(!clk->parent)) + return rate; + + rate = clk->parent->rate; + + /* the parent must be a PLL */ + if (WARN_ON(!clk->parent->pll_data)) + return rate; + + pll = clk->parent->pll_data; + + /* If pre-PLL, source clock is before the multiplier and divider(s) */ + if (clk->flags & PRE_PLL) + rate = pll->input_rate; + + if (!clk->div) { + pr_debug("%s: (no divider) rate = %lu KHz\n", + clk->name, rate / 1000); + return rate; + } + + if (clk->flags & FIXED_DIV_PLL) { + rate /= clk->div; + pr_debug("%s: (fixed divide by %d) rate = %lu KHz\n", + clk->name, clk->div, rate / 1000); + return rate; + } + + v = pll_read(pll, clk->div); + if (v & PLLDIV_EN) + plldiv = (v & PLLDIV_RATIO_MASK) + 1; + + if (plldiv == 0) + plldiv = 1; + + rate /= plldiv; + + pr_debug("%s: (divide by %d) rate = %lu KHz\n", + clk->name, plldiv, rate / 1000); + + return rate; +} + +static unsigned long clk_leafclk_recalc(struct clk *clk) +{ + if (WARN_ON(!clk->parent)) + return clk->rate; + + pr_debug("%s: (parent %s) rate = %lu KHz\n", + clk->name, clk->parent->name, clk->parent->rate / 1000); + + return clk->parent->rate; +} + +static unsigned long clk_pllclk_recalc(struct clk *clk) +{ + u32 ctrl, mult = 0, prediv = 0, postdiv = 0; + u8 bypass; + struct pll_data *pll = clk->pll_data; + unsigned long rate = clk->rate; + + if (clk->flags & FIXED_RATE_PLL) + return rate; + + ctrl = pll_read(pll, PLLCTL); + rate = pll->input_rate = clk->parent->rate; + + if (ctrl & PLLCTL_PLLEN) + bypass = 0; + else + bypass = 1; + + if (pll->flags & PLL_HAS_MUL) { + mult = pll_read(pll, PLLM); + mult = (mult & PLLM_PLLM_MASK) + 1; + } + if (pll->flags & PLL_HAS_PRE) { + prediv = pll_read(pll, PLLPRE); + if (prediv & PLLDIV_EN) + prediv = (prediv & PLLDIV_RATIO_MASK) + 1; + else + prediv = 0; + } + if (pll->flags & PLL_HAS_POST) { + postdiv = pll_read(pll, PLLPOST); + if (postdiv & PLLDIV_EN) + postdiv = (postdiv & PLLDIV_RATIO_MASK) + 1; + else + postdiv = 1; + } + + if (!bypass) { + if (prediv) + rate /= prediv; + if (mult) + rate *= mult; + if (postdiv) + rate /= postdiv; + + pr_debug("PLL%d: input = %luMHz, pre[%d] mul[%d] post[%d] " + "--> %luMHz output.\n", + pll->num, clk->parent->rate / 1000000, + prediv, mult, postdiv, rate / 1000000); + } else + pr_debug("PLL%d: input = %luMHz, bypass mode.\n", + pll->num, clk->parent->rate / 1000000); + + return rate; +} + + +static void __init __init_clk(struct clk *clk) +{ + INIT_LIST_HEAD(&clk->node); + INIT_LIST_HEAD(&clk->children); + INIT_LIST_HEAD(&clk->childnode); + + if (!clk->recalc) { + + /* Check if clock is a PLL */ + if (clk->pll_data) + clk->recalc = clk_pllclk_recalc; + + /* Else, if it is a PLL-derived clock */ + else if (clk->flags & CLK_PLL) + clk->recalc = clk_sysclk_recalc; + + /* Otherwise, it is a leaf clock (PSC clock) */ + else if (clk->parent) + clk->recalc = clk_leafclk_recalc; + } +} + +void __init c6x_clks_init(struct clk_lookup *clocks) +{ + struct clk_lookup *c; + struct clk *clk; + size_t num_clocks = 0; + + for (c = clocks; c->clk; c++) { + clk = c->clk; + + __init_clk(clk); + clk_register(clk); + num_clocks++; + + /* Turn on clocks that Linux doesn't otherwise manage */ + if (clk->flags & ALWAYS_ENABLED) + clk_enable(clk); + } + + clkdev_add_table(clocks, num_clocks); +} + +#ifdef CONFIG_DEBUG_FS + +#include <linux/debugfs.h> +#include <linux/seq_file.h> + +#define CLKNAME_MAX 10 /* longest clock name */ +#define NEST_DELTA 2 +#define NEST_MAX 4 + +static void +dump_clock(struct seq_file *s, unsigned nest, struct clk *parent) +{ + char *state; + char buf[CLKNAME_MAX + NEST_DELTA * NEST_MAX]; + struct clk *clk; + unsigned i; + + if (parent->flags & CLK_PLL) + state = "pll"; + else + state = ""; + + /* <nest spaces> name <pad to end> */ + memset(buf, ' ', sizeof(buf) - 1); + buf[sizeof(buf) - 1] = 0; + i = strlen(parent->name); + memcpy(buf + nest, parent->name, + min(i, (unsigned)(sizeof(buf) - 1 - nest))); + + seq_printf(s, "%s users=%2d %-3s %9ld Hz\n", + buf, parent->usecount, state, clk_get_rate(parent)); + /* REVISIT show device associations too */ + + /* cost is now small, but not linear... */ + list_for_each_entry(clk, &parent->children, childnode) { + dump_clock(s, nest + NEST_DELTA, clk); + } +} + +static int c6x_ck_show(struct seq_file *m, void *v) +{ + struct clk *clk; + + /* + * Show clock tree; We trust nonzero usecounts equate to PSC enables... + */ + mutex_lock(&clocks_mutex); + list_for_each_entry(clk, &clocks, node) + if (!clk->parent) + dump_clock(m, 0, clk); + mutex_unlock(&clocks_mutex); + + return 0; +} + +static int c6x_ck_open(struct inode *inode, struct file *file) +{ + return single_open(file, c6x_ck_show, NULL); +} + +static const struct file_operations c6x_ck_operations = { + .open = c6x_ck_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init c6x_clk_debugfs_init(void) +{ + debugfs_create_file("c6x_clocks", S_IFREG | S_IRUGO, NULL, NULL, + &c6x_ck_operations); + + return 0; +} +device_initcall(c6x_clk_debugfs_init); +#endif /* CONFIG_DEBUG_FS */ diff --git a/arch/c6x/platforms/plldata.c b/arch/c6x/platforms/plldata.c new file mode 100644 index 0000000..2cfd6f4 --- /dev/null +++ b/arch/c6x/platforms/plldata.c @@ -0,0 +1,404 @@ +/* + * Port on Texas Instruments TMS320C6x architecture + * + * Copyright (C) 2011 Texas Instruments Incorporated + * Author: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/ioport.h> +#include <linux/clkdev.h> +#include <linux/of.h> +#include <linux/of_address.h> + +#include <asm/clock.h> +#include <asm/setup.h> +#include <asm/irq.h> + +/* + * Common SoC clock support. + */ + +/* Default input for PLL1 */ +struct clk clkin1 = { + .name = "clkin1", + .node = LIST_HEAD_INIT(clkin1.node), + .children = LIST_HEAD_INIT(clkin1.children), + .childnode = LIST_HEAD_INIT(clkin1.childnode), +}; + +struct pll_data c6x_soc_pll1 = { + .num = 1, + .sysclks = { + { + .name = "pll1", + .parent = &clkin1, + .pll_data = &c6x_soc_pll1, + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk1", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk2", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk3", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk4", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk5", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk6", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk7", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk8", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk9", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk10", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk11", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk12", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk13", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk14", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk15", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + { + .name = "pll1_sysclk16", + .parent = &c6x_soc_pll1.sysclks[0], + .flags = CLK_PLL, + }, + }, +}; + +/* CPU core clock */ +struct clk c6x_core_clk = { + .name = "core", +}; + +/* miscellaneous IO clocks */ +struct clk c6x_i2c_clk = { + .name = "i2c", +}; + +struct clk c6x_watchdog_clk = { + .name = "watchdog", +}; + +struct clk c6x_mcbsp1_clk = { + .name = "mcbsp1", +}; + +struct clk c6x_mcbsp2_clk = { + .name = "mcbsp2", +}; + +struct clk c6x_mdio_clk = { + .name = "mdio", +}; + + +#ifdef CONFIG_SOC_TMS320C6455 +static struct clk_lookup c6455_clks[] = { + CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]), + CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]), + CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]), + CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]), + CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]), + CLK(NULL, "core", &c6x_core_clk), + CLK("i2c_davinci.1", NULL, &c6x_i2c_clk), + CLK("watchdog", NULL, &c6x_watchdog_clk), + CLK("2c81800.mdio", NULL, &c6x_mdio_clk), + CLK("", NULL, NULL) +}; + + +static void __init c6455_setup_clocks(struct device_node *node) +{ + struct pll_data *pll = &c6x_soc_pll1; + struct clk *sysclks = pll->sysclks; + + pll->flags = PLL_HAS_PRE | PLL_HAS_MUL; + + sysclks[2].flags |= FIXED_DIV_PLL; + sysclks[2].div = 3; + sysclks[3].flags |= FIXED_DIV_PLL; + sysclks[3].div = 6; + sysclks[4].div = PLLDIV4; + sysclks[5].div = PLLDIV5; + + c6x_core_clk.parent = &sysclks[0]; + c6x_i2c_clk.parent = &sysclks[3]; + c6x_watchdog_clk.parent = &sysclks[3]; + c6x_mdio_clk.parent = &sysclks[3]; + + c6x_clks_init(c6455_clks); +} +#endif /* CONFIG_SOC_TMS320C6455 */ + +#ifdef CONFIG_SOC_TMS320C6457 +static struct clk_lookup c6457_clks[] = { + CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]), + CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]), + CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]), + CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]), + CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]), + CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]), + CLK(NULL, "core", &c6x_core_clk), + CLK("i2c_davinci.1", NULL, &c6x_i2c_clk), + CLK("watchdog", NULL, &c6x_watchdog_clk), + CLK("2c81800.mdio", NULL, &c6x_mdio_clk), + CLK("", NULL, NULL) +}; + +static void __init c6457_setup_clocks(struct device_node *node) +{ + struct pll_data *pll = &c6x_soc_pll1; + struct clk *sysclks = pll->sysclks; + + pll->flags = PLL_HAS_MUL | PLL_HAS_POST; + + sysclks[1].flags |= FIXED_DIV_PLL; + sysclks[1].div = 1; + sysclks[2].flags |= FIXED_DIV_PLL; + sysclks[2].div = 3; + sysclks[3].flags |= FIXED_DIV_PLL; + sysclks[3].div = 6; + sysclks[4].div = PLLDIV4; + sysclks[5].div = PLLDIV5; + + c6x_core_clk.parent = &sysclks[1]; + c6x_i2c_clk.parent = &sysclks[3]; + c6x_watchdog_clk.parent = &sysclks[5]; + c6x_mdio_clk.parent = &sysclks[5]; + + c6x_clks_init(c6457_clks); +} +#endif /* CONFIG_SOC_TMS320C6455 */ + +#ifdef CONFIG_SOC_TMS320C6472 +static struct clk_lookup c6472_clks[] = { + CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]), + CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]), + CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]), + CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]), + CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]), + CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]), + CLK(NULL, "pll1_sysclk6", &c6x_soc_pll1.sysclks[6]), + CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]), + CLK(NULL, "pll1_sysclk8", &c6x_soc_pll1.sysclks[8]), + CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]), + CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]), + CLK(NULL, "core", &c6x_core_clk), + CLK("i2c_davinci.1", NULL, &c6x_i2c_clk), + CLK("watchdog", NULL, &c6x_watchdog_clk), + CLK("2c81800.mdio", NULL, &c6x_mdio_clk), + CLK("", NULL, NULL) +}; + +/* assumptions used for delay loop calculations */ +#define MIN_CLKIN1_KHz 15625 +#define MAX_CORE_KHz 700000 +#define MIN_PLLOUT_KHz MIN_CLKIN1_KHz + +static void __init c6472_setup_clocks(struct device_node *node) +{ + struct pll_data *pll = &c6x_soc_pll1; + struct clk *sysclks = pll->sysclks; + int i; + + pll->flags = PLL_HAS_MUL; + + for (i = 1; i <= 6; i++) { + sysclks[i].flags |= FIXED_DIV_PLL; + sysclks[i].div = 1; + } + + sysclks[7].flags |= FIXED_DIV_PLL; + sysclks[7].div = 3; + sysclks[8].flags |= FIXED_DIV_PLL; + sysclks[8].div = 6; + sysclks[9].flags |= FIXED_DIV_PLL; + sysclks[9].div = 2; + sysclks[10].div = PLLDIV10; + + c6x_core_clk.parent = &sysclks[get_coreid() + 1]; + c6x_i2c_clk.parent = &sysclks[8]; + c6x_watchdog_clk.parent = &sysclks[8]; + c6x_mdio_clk.parent = &sysclks[5]; + + c6x_clks_init(c6472_clks); +} +#endif /* CONFIG_SOC_TMS320C6472 */ + + +#ifdef CONFIG_SOC_TMS320C6474 +static struct clk_lookup c6474_clks[] = { + CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]), + CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]), + CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]), + CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]), + CLK(NULL, "pll1_sysclk11", &c6x_soc_pll1.sysclks[11]), + CLK(NULL, "pll1_sysclk12", &c6x_soc_pll1.sysclks[12]), + CLK(NULL, "pll1_sysclk13", &c6x_soc_pll1.sysclks[13]), + CLK(NULL, "core", &c6x_core_clk), + CLK("i2c_davinci.1", NULL, &c6x_i2c_clk), + CLK("mcbsp.1", NULL, &c6x_mcbsp1_clk), + CLK("mcbsp.2", NULL, &c6x_mcbsp2_clk), + CLK("watchdog", NULL, &c6x_watchdog_clk), + CLK("2c81800.mdio", NULL, &c6x_mdio_clk), + CLK("", NULL, NULL) +}; + +static void __init c6474_setup_clocks(struct device_node *node) +{ + struct pll_data *pll = &c6x_soc_pll1; + struct clk *sysclks = pll->sysclks; + + pll->flags = PLL_HAS_MUL; + + sysclks[7].flags |= FIXED_DIV_PLL; + sysclks[7].div = 1; + sysclks[9].flags |= FIXED_DIV_PLL; + sysclks[9].div = 3; + sysclks[10].flags |= FIXED_DIV_PLL; + sysclks[10].div = 6; + + sysclks[11].div = PLLDIV11; + + sysclks[12].flags |= FIXED_DIV_PLL; + sysclks[12].div = 2; + + sysclks[13].div = PLLDIV13; + + c6x_core_clk.parent = &sysclks[7]; + c6x_i2c_clk.parent = &sysclks[10]; + c6x_watchdog_clk.parent = &sysclks[10]; + c6x_mcbsp1_clk.parent = &sysclks[10]; + c6x_mcbsp2_clk.parent = &sysclks[10]; + + c6x_clks_init(c6474_clks); +} +#endif /* CONFIG_SOC_TMS320C6474 */ + +static struct of_device_id c6x_clkc_match[] __initdata = { +#ifdef CONFIG_SOC_TMS320C6455 + { .compatible = "ti,c6455-pll", .data = c6455_setup_clocks }, +#endif +#ifdef CONFIG_SOC_TMS320C6457 + { .compatible = "ti,c6457-pll", .data = c6457_setup_clocks }, +#endif +#ifdef CONFIG_SOC_TMS320C6472 + { .compatible = "ti,c6472-pll", .data = c6472_setup_clocks }, +#endif +#ifdef CONFIG_SOC_TMS320C6474 + { .compatible = "ti,c6474-pll", .data = c6474_setup_clocks }, +#endif + { .compatible = "ti,c64x+pll" }, + {} +}; + +void __init c64x_setup_clocks(void) +{ + void (*__setup_clocks)(struct device_node *np); + struct pll_data *pll = &c6x_soc_pll1; + struct device_node *node; + const struct of_device_id *id; + int err; + u32 val; + + node = of_find_matching_node(NULL, c6x_clkc_match); + if (!node) + return; + + pll->base = of_iomap(node, 0); + if (!pll->base) + goto out; + + err = of_property_read_u32(node, "clock-frequency", &val); + if (err || val == 0) { + pr_err("%s: no clock-frequency found! Using %dMHz\n", + node->full_name, (int)val / 1000000); + val = 25000000; + } + clkin1.rate = val; + + err = of_property_read_u32(node, "ti,c64x+pll-bypass-delay", &val); + if (err) + val = 5000; + pll->bypass_delay = val; + + err = of_property_read_u32(node, "ti,c64x+pll-reset-delay", &val); + if (err) + val = 30000; + pll->reset_delay = val; + + err = of_property_read_u32(node, "ti,c64x+pll-lock-delay", &val); + if (err) + val = 30000; + pll->lock_delay = val; + + /* id->data is a pointer to SoC-specific setup */ + id = of_match_node(c6x_clkc_match, node); + if (id && id->data) { + __setup_clocks = id->data; + __setup_clocks(node); + } + +out: + of_node_put(node); +} diff --git a/arch/c6x/platforms/timer64.c b/arch/c6x/platforms/timer64.c new file mode 100644 index 0000000..03c03c2 --- /dev/null +++ b/arch/c6x/platforms/timer64.c @@ -0,0 +1,244 @@ +/* + * Copyright (C) 2010, 2011 Texas Instruments Incorporated + * Contributed by: Mark Salter (msalter@redhat.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/clockchips.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> +#include <asm/soc.h> +#include <asm/dscr.h> +#include <asm/timer64.h> + +struct timer_regs { + u32 reserved0; + u32 emumgt; + u32 reserved1; + u32 reserved2; + u32 cntlo; + u32 cnthi; + u32 prdlo; + u32 prdhi; + u32 tcr; + u32 tgcr; + u32 wdtcr; +}; + +static struct timer_regs __iomem *timer; + +#define TCR_TSTATLO 0x001 +#define TCR_INVOUTPLO 0x002 +#define TCR_INVINPLO 0x004 +#define TCR_CPLO 0x008 +#define TCR_ENAMODELO_ONCE 0x040 +#define TCR_ENAMODELO_CONT 0x080 +#define TCR_ENAMODELO_MASK 0x0c0 +#define TCR_PWIDLO_MASK 0x030 +#define TCR_CLKSRCLO 0x100 +#define TCR_TIENLO 0x200 +#define TCR_TSTATHI (0x001 << 16) +#define TCR_INVOUTPHI (0x002 << 16) +#define TCR_CPHI (0x008 << 16) +#define TCR_PWIDHI_MASK (0x030 << 16) +#define TCR_ENAMODEHI_ONCE (0x040 << 16) +#define TCR_ENAMODEHI_CONT (0x080 << 16) +#define TCR_ENAMODEHI_MASK (0x0c0 << 16) + +#define TGCR_TIMLORS 0x001 +#define TGCR_TIMHIRS 0x002 +#define TGCR_TIMMODE_UD32 0x004 +#define TGCR_TIMMODE_WDT64 0x008 +#define TGCR_TIMMODE_CD32 0x00c +#define TGCR_TIMMODE_MASK 0x00c +#define TGCR_PSCHI_MASK (0x00f << 8) +#define TGCR_TDDRHI_MASK (0x00f << 12) + +/* + * Timer clocks are divided down from the CPU clock + * The divisor is in the EMUMGTCLKSPD register + */ +#define TIMER_DIVISOR \ + ((soc_readl(&timer->emumgt) & (0xf << 16)) >> 16) + +#define TIMER64_RATE (c6x_core_freq / TIMER_DIVISOR) + +#define TIMER64_MODE_DISABLED 0 +#define TIMER64_MODE_ONE_SHOT TCR_ENAMODELO_ONCE +#define TIMER64_MODE_PERIODIC TCR_ENAMODELO_CONT + +static int timer64_mode; +static int timer64_devstate_id = -1; + +static void timer64_config(unsigned long period) +{ + u32 tcr = soc_readl(&timer->tcr) & ~TCR_ENAMODELO_MASK; + + soc_writel(tcr, &timer->tcr); + soc_writel(period - 1, &timer->prdlo); + soc_writel(0, &timer->cntlo); + tcr |= timer64_mode; + soc_writel(tcr, &timer->tcr); +} + +static void timer64_enable(void) +{ + u32 val; + + if (timer64_devstate_id >= 0) + dscr_set_devstate(timer64_devstate_id, DSCR_DEVSTATE_ENABLED); + + /* disable timer, reset count */ + soc_writel(soc_readl(&timer->tcr) & ~TCR_ENAMODELO_MASK, &timer->tcr); + soc_writel(0, &timer->prdlo); + + /* use internal clock and 1 cycle pulse width */ + val = soc_readl(&timer->tcr); + soc_writel(val & ~(TCR_CLKSRCLO | TCR_PWIDLO_MASK), &timer->tcr); + + /* dual 32-bit unchained mode */ + val = soc_readl(&timer->tgcr) & ~TGCR_TIMMODE_MASK; + soc_writel(val, &timer->tgcr); + soc_writel(val | (TGCR_TIMLORS | TGCR_TIMMODE_UD32), &timer->tgcr); +} + +static void timer64_disable(void) +{ + /* disable timer, reset count */ + soc_writel(soc_readl(&timer->tcr) & ~TCR_ENAMODELO_MASK, &timer->tcr); + soc_writel(0, &timer->prdlo); + + if (timer64_devstate_id >= 0) + dscr_set_devstate(timer64_devstate_id, DSCR_DEVSTATE_DISABLED); +} + +static int next_event(unsigned long delta, + struct clock_event_device *evt) +{ + timer64_config(delta); + return 0; +} + +static void set_clock_mode(enum clock_event_mode mode, + struct clock_event_device *evt) +{ + switch (mode) { + case CLOCK_EVT_MODE_PERIODIC: + timer64_enable(); + timer64_mode = TIMER64_MODE_PERIODIC; + timer64_config(TIMER64_RATE / HZ); + break; + case CLOCK_EVT_MODE_ONESHOT: + timer64_enable(); + timer64_mode = TIMER64_MODE_ONE_SHOT; + break; + case CLOCK_EVT_MODE_UNUSED: + case CLOCK_EVT_MODE_SHUTDOWN: + timer64_mode = TIMER64_MODE_DISABLED; + timer64_disable(); + break; + case CLOCK_EVT_MODE_RESUME: + break; + } +} + +static struct clock_event_device t64_clockevent_device = { + .name = "TIMER64_EVT32_TIMER", + .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC, + .rating = 200, + .set_mode = set_clock_mode, + .set_next_event = next_event, +}; + +static irqreturn_t timer_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *cd = &t64_clockevent_device; + + cd->event_handler(cd); + + return IRQ_HANDLED; +} + +static struct irqaction timer_iact = { + .name = "timer", + .flags = IRQF_TIMER, + .handler = timer_interrupt, + .dev_id = &t64_clockevent_device, +}; + +void __init timer64_init(void) +{ + struct clock_event_device *cd = &t64_clockevent_device; + struct device_node *np, *first = NULL; + u32 val; + int err, found = 0; + + for_each_compatible_node(np, NULL, "ti,c64x+timer64") { + err = of_property_read_u32(np, "ti,core-mask", &val); + if (!err) { + if (val & (1 << get_coreid())) { + found = 1; + break; + } + } else if (!first) + first = np; + } + if (!found) { + /* try first one with no core-mask */ + if (first) + np = of_node_get(first); + else { + pr_debug("Cannot find ti,c64x+timer64 timer.\n"); + return; + } + } + + timer = of_iomap(np, 0); + if (!timer) { + pr_debug("%s: Cannot map timer registers.\n", np->full_name); + goto out; + } + pr_debug("%s: Timer registers=%p.\n", np->full_name, timer); + + cd->irq = irq_of_parse_and_map(np, 0); + if (cd->irq == NO_IRQ) { + pr_debug("%s: Cannot find interrupt.\n", np->full_name); + iounmap(timer); + goto out; + } + + /* If there is a device state control, save the ID. */ + err = of_property_read_u32(np, "ti,dscr-dev-enable", &val); + if (!err) { + timer64_devstate_id = val; + + /* + * It is necessary to enable the timer block here because + * the TIMER_DIVISOR macro needs to read a timer register + * to get the divisor. + */ + dscr_set_devstate(timer64_devstate_id, DSCR_DEVSTATE_ENABLED); + } + + pr_debug("%s: Timer irq=%d.\n", np->full_name, cd->irq); + + clockevents_calc_mult_shift(cd, c6x_core_freq / TIMER_DIVISOR, 5); + + cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd); + cd->min_delta_ns = clockevent_delta2ns(250, cd); + + cd->cpumask = cpumask_of(smp_processor_id()); + + clockevents_register_device(cd); + setup_irq(cd->irq, &timer_iact); + +out: + of_node_put(np); + return; +} |
