summaryrefslogtreecommitdiffstats
path: root/arch/m68k/kernel
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-24 17:20:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-24 17:20:51 -0700
commit2c05b2c838e7adaabb7265ad5d5b632315c20821 (patch)
treecb29c9de665f216825a7932afb7c6329ab9ae158 /arch/m68k/kernel
parentc511dc1fb6bee58363eb203d53393784f2589d02 (diff)
parentb1f7735ef47a97108f945eac48812855b6599139 (diff)
downloadop-kernel-dev-2c05b2c838e7adaabb7265ad5d5b632315c20821.zip
op-kernel-dev-2c05b2c838e7adaabb7265ad5d5b632315c20821.tar.gz
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Pull m68knommu arch update from Greg Ungerer: "Quite a varied set of changes this time. - A little more merge cleanup, this time the assembler entry code. - New sub-architecture support for the ColdFire 5251/5253 and 5441x CPU families. - Specific clk support code for the ColdFire 520x and 532x CPU familes. - Refactoring of the ColdFire GPIO support. - PCI bus support for some ColdFire CPUS that have PCI hardware (54xx family). This showed up a few problems with ColdFire cache, allocating coherent memory and bi-directional DMA support. Fixes for those too." * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: (21 commits) m68k: allow PCI bus to be enabled for ColdFire m54xx CPUs m68k: add PCI bus code support for the ColdFire M54xx SoC family m68k: add IO access definitions to support PCI on ColdFire platforms m68k: add PCI bus support definitions for the ColdFire M54xx SoC family m68k: common PCI support definitions and code m68k: add support for DMA_BIDIRECTIONAL in dma support functions m68k: fix ColdFire clear cache operation m68k: use simpler dma_alloc_coherent() for ColdFire CPUs m68knommu: platform support for 8390 based ethernet used on some boards m68knommu: Add clk definitions for m532x. m68knommu: Add clk definitions for m520x. m68knommu: Add rtc device for m5441x. m68knommu: add definitions for the third interrupt controller on devices that don't have a third interrupt controller. m68knommu: Add support for the Coldfire m5441x. m68knommu: use MCF_IRQ_PIT1 instead of MCFINT_VECBASE + MCFINT_PIT1 coldfire-qspi: Add support for the Coldfire 5251/5253. m68knommu: Add support for the Coldfire 5251/5253 m68knommu: refactor Coldfire GPIO not to require GPIOLIB, eliminate mcf_gpio_chips. m68k: merge the MMU and non-MMU versions of the entry.S code m68k: use jbsr to call functions instead of bsrl ...
Diffstat (limited to 'arch/m68k/kernel')
-rw-r--r--arch/m68k/kernel/Makefile1
-rw-r--r--arch/m68k/kernel/dma.c5
-rw-r--r--arch/m68k/kernel/entry.S452
-rw-r--r--arch/m68k/kernel/entry_mm.S419
-rw-r--r--arch/m68k/kernel/entry_no.S130
-rw-r--r--arch/m68k/kernel/pcibios.c109
6 files changed, 562 insertions, 554 deletions
diff --git a/arch/m68k/kernel/Makefile b/arch/m68k/kernel/Makefile
index 5c7070e..068ad49 100644
--- a/arch/m68k/kernel/Makefile
+++ b/arch/m68k/kernel/Makefile
@@ -18,6 +18,7 @@ obj-y += setup.o signal.o sys_m68k.o syscalltable.o time.o traps.o
obj-$(CONFIG_MMU_MOTOROLA) += ints.o vectors.o
obj-$(CONFIG_MMU_SUN3) += ints.o vectors.o
+obj-$(CONFIG_PCI) += pcibios.o
ifndef CONFIG_MMU_SUN3
obj-y += dma.o
diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c
index f6daf6e..e546a55 100644
--- a/arch/m68k/kernel/dma.c
+++ b/arch/m68k/kernel/dma.c
@@ -16,7 +16,7 @@
#include <asm/pgalloc.h>
-#ifdef CONFIG_MMU
+#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t flag)
@@ -96,7 +96,7 @@ void dma_free_coherent(struct device *dev, size_t size,
free_pages((unsigned long)vaddr, get_order(size));
}
-#endif /* CONFIG_MMU */
+#endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
EXPORT_SYMBOL(dma_alloc_coherent);
EXPORT_SYMBOL(dma_free_coherent);
@@ -105,6 +105,7 @@ void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
switch (dir) {
+ case DMA_BIDIRECTIONAL:
case DMA_TO_DEVICE:
cache_push(handle, size);
break;
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S
index b8daf64..165ee9f 100644
--- a/arch/m68k/kernel/entry.S
+++ b/arch/m68k/kernel/entry.S
@@ -1,5 +1,451 @@
-#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
-#include "entry_mm.S"
+/* -*- mode: asm -*-
+ *
+ * linux/arch/m68k/kernel/entry.S
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file README.legal in the main directory of this archive
+ * for more details.
+ *
+ * Linux/m68k support by Hamish Macdonald
+ *
+ * 68060 fixes by Jesper Skov
+ *
+ */
+
+/*
+ * entry.S contains the system-call and fault low-level handling routines.
+ * This also contains the timer-interrupt handler, as well as all interrupts
+ * and faults that can result in a task-switch.
+ *
+ * NOTE: This code handles signal-recognition, which happens every time
+ * after a timer-interrupt and after each system call.
+ *
+ */
+
+/*
+ * 12/03/96 Jes: Currently we only support m68k single-cpu systems, so
+ * all pointers that used to be 'current' are now entry
+ * number 0 in the 'current_set' list.
+ *
+ * 6/05/00 RZ: addedd writeback completion after return from sighandler
+ * for 68040
+ */
+
+#include <linux/linkage.h>
+#include <asm/errno.h>
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/traps.h>
+#include <asm/unistd.h>
+#include <asm/asm-offsets.h>
+#include <asm/entry.h>
+
+.globl system_call, buserr, trap, resume
+.globl sys_call_table
+.globl sys_fork, sys_clone, sys_vfork
+.globl ret_from_interrupt, bad_interrupt
+.globl auto_irqhandler_fixup
+.globl user_irqvec_fixup
+
+.text
+ENTRY(sys_fork)
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ jbsr m68k_fork
+ addql #4,%sp
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_clone)
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ jbsr m68k_clone
+ addql #4,%sp
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_vfork)
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ jbsr m68k_vfork
+ addql #4,%sp
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_sigreturn)
+ SAVE_SWITCH_STACK
+ jbsr do_sigreturn
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(sys_rt_sigreturn)
+ SAVE_SWITCH_STACK
+ jbsr do_rt_sigreturn
+ RESTORE_SWITCH_STACK
+ rts
+
+ENTRY(buserr)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ movel %sp,%sp@- | stack frame pointer argument
+ jbsr buserr_c
+ addql #4,%sp
+ jra ret_from_exception
+
+ENTRY(trap)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ movel %sp,%sp@- | stack frame pointer argument
+ jbsr trap_c
+ addql #4,%sp
+ jra ret_from_exception
+
+ | After a fork we jump here directly from resume,
+ | so that %d1 contains the previous task
+ | schedule_tail now used regardless of CONFIG_SMP
+ENTRY(ret_from_fork)
+ movel %d1,%sp@-
+ jsr schedule_tail
+ addql #4,%sp
+ jra ret_from_exception
+
+#if defined(CONFIG_COLDFIRE) || !defined(CONFIG_MMU)
+
+#ifdef TRAP_DBG_INTERRUPT
+
+.globl dbginterrupt
+ENTRY(dbginterrupt)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ movel %sp,%sp@- /* stack frame pointer argument */
+ jsr dbginterrupt_c
+ addql #4,%sp
+ jra ret_from_exception
+#endif
+
+ENTRY(reschedule)
+ /* save top of frame */
+ pea %sp@
+ jbsr set_esp0
+ addql #4,%sp
+ pea ret_from_exception
+ jmp schedule
+
+ENTRY(ret_from_user_signal)
+ moveq #__NR_sigreturn,%d0
+ trap #0
+
+ENTRY(ret_from_user_rt_signal)
+ movel #__NR_rt_sigreturn,%d0
+ trap #0
+
#else
-#include "entry_no.S"
+
+do_trace_entry:
+ movel #-ENOSYS,%sp@(PT_OFF_D0)| needed for strace
+ subql #4,%sp
+ SAVE_SWITCH_STACK
+ jbsr syscall_trace
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+ movel %sp@(PT_OFF_ORIG_D0),%d0
+ cmpl #NR_syscalls,%d0
+ jcs syscall
+badsys:
+ movel #-ENOSYS,%sp@(PT_OFF_D0)
+ jra ret_from_syscall
+
+do_trace_exit:
+ subql #4,%sp
+ SAVE_SWITCH_STACK
+ jbsr syscall_trace
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+ jra .Lret_from_exception
+
+ENTRY(ret_from_signal)
+ movel %curptr@(TASK_STACK),%a1
+ tstb %a1@(TINFO_FLAGS+2)
+ jge 1f
+ jbsr syscall_trace
+1: RESTORE_SWITCH_STACK
+ addql #4,%sp
+/* on 68040 complete pending writebacks if any */
+#ifdef CONFIG_M68040
+ bfextu %sp@(PT_OFF_FORMATVEC){#0,#4},%d0
+ subql #7,%d0 | bus error frame ?
+ jbne 1f
+ movel %sp,%sp@-
+ jbsr berr_040cleanup
+ addql #4,%sp
+1:
+#endif
+ jra .Lret_from_exception
+
+ENTRY(system_call)
+ SAVE_ALL_SYS
+
+ GET_CURRENT(%d1)
+ movel %d1,%a1
+
+ | save top of frame
+ movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0)
+
+ | syscall trace?
+ tstb %a1@(TINFO_FLAGS+2)
+ jmi do_trace_entry
+ cmpl #NR_syscalls,%d0
+ jcc badsys
+syscall:
+ jbsr @(sys_call_table,%d0:l:4)@(0)
+ movel %d0,%sp@(PT_OFF_D0) | save the return value
+ret_from_syscall:
+ |oriw #0x0700,%sr
+ movel %curptr@(TASK_STACK),%a1
+ movew %a1@(TINFO_FLAGS+2),%d0
+ jne syscall_exit_work
+1: RESTORE_ALL
+
+syscall_exit_work:
+ btst #5,%sp@(PT_OFF_SR) | check if returning to kernel
+ bnes 1b | if so, skip resched, signals
+ lslw #1,%d0
+ jcs do_trace_exit
+ jmi do_delayed_trace
+ lslw #8,%d0
+ jne do_signal_return
+ pea resume_userspace
+ jra schedule
+
+
+ENTRY(ret_from_exception)
+.Lret_from_exception:
+ btst #5,%sp@(PT_OFF_SR) | check if returning to kernel
+ bnes 1f | if so, skip resched, signals
+ | only allow interrupts when we are really the last one on the
+ | kernel stack, otherwise stack overflow can occur during
+ | heavy interrupt load
+ andw #ALLOWINT,%sr
+
+resume_userspace:
+ movel %curptr@(TASK_STACK),%a1
+ moveb %a1@(TINFO_FLAGS+3),%d0
+ jne exit_work
+1: RESTORE_ALL
+
+exit_work:
+ | save top of frame
+ movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0)
+ lslb #1,%d0
+ jne do_signal_return
+ pea resume_userspace
+ jra schedule
+
+
+do_signal_return:
+ |andw #ALLOWINT,%sr
+ subql #4,%sp | dummy return address
+ SAVE_SWITCH_STACK
+ pea %sp@(SWITCH_STACK_SIZE)
+ bsrl do_notify_resume
+ addql #4,%sp
+ RESTORE_SWITCH_STACK
+ addql #4,%sp
+ jbra resume_userspace
+
+do_delayed_trace:
+ bclr #7,%sp@(PT_OFF_SR) | clear trace bit in SR
+ pea 1 | send SIGTRAP
+ movel %curptr,%sp@-
+ pea LSIGTRAP
+ jbsr send_sig
+ addql #8,%sp
+ addql #4,%sp
+ jbra resume_userspace
+
+
+/* This is the main interrupt handler for autovector interrupts */
+
+ENTRY(auto_inthandler)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ movel %d0,%a1
+ addqb #1,%a1@(TINFO_PREEMPT+1)
+ | put exception # in d0
+ bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0
+ subw #VEC_SPUR,%d0
+
+ movel %sp,%sp@-
+ movel %d0,%sp@- | put vector # on stack
+auto_irqhandler_fixup = . + 2
+ jsr do_IRQ | process the IRQ
+ addql #8,%sp | pop parameters off stack
+
+ret_from_interrupt:
+ movel %curptr@(TASK_STACK),%a1
+ subqb #1,%a1@(TINFO_PREEMPT+1)
+ jeq ret_from_last_interrupt
+2: RESTORE_ALL
+
+ ALIGN
+ret_from_last_interrupt:
+ moveq #(~ALLOWINT>>8)&0xff,%d0
+ andb %sp@(PT_OFF_SR),%d0
+ jne 2b
+
+ /* check if we need to do software interrupts */
+ tstl irq_stat+CPUSTAT_SOFTIRQ_PENDING
+ jeq .Lret_from_exception
+ pea ret_from_exception
+ jra do_softirq
+
+/* Handler for user defined interrupt vectors */
+
+ENTRY(user_inthandler)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ movel %d0,%a1
+ addqb #1,%a1@(TINFO_PREEMPT+1)
+ | put exception # in d0
+ bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0
+user_irqvec_fixup = . + 2
+ subw #VEC_USER,%d0
+
+ movel %sp,%sp@-
+ movel %d0,%sp@- | put vector # on stack
+ jsr do_IRQ | process the IRQ
+ addql #8,%sp | pop parameters off stack
+
+ movel %curptr@(TASK_STACK),%a1
+ subqb #1,%a1@(TINFO_PREEMPT+1)
+ jeq ret_from_last_interrupt
+ RESTORE_ALL
+
+/* Handler for uninitialized and spurious interrupts */
+
+ENTRY(bad_inthandler)
+ SAVE_ALL_INT
+ GET_CURRENT(%d0)
+ movel %d0,%a1
+ addqb #1,%a1@(TINFO_PREEMPT+1)
+
+ movel %sp,%sp@-
+ jsr handle_badint
+ addql #4,%sp
+
+ movel %curptr@(TASK_STACK),%a1
+ subqb #1,%a1@(TINFO_PREEMPT+1)
+ jeq ret_from_last_interrupt
+ RESTORE_ALL
+
+
+resume:
+ /*
+ * Beware - when entering resume, prev (the current task) is
+ * in a0, next (the new task) is in a1,so don't change these
+ * registers until their contents are no longer needed.
+ */
+
+ /* save sr */
+ movew %sr,%a0@(TASK_THREAD+THREAD_SR)
+
+ /* save fs (sfc,%dfc) (may be pointing to kernel memory) */
+ movec %sfc,%d0
+ movew %d0,%a0@(TASK_THREAD+THREAD_FS)
+
+ /* save usp */
+ /* it is better to use a movel here instead of a movew 8*) */
+ movec %usp,%d0
+ movel %d0,%a0@(TASK_THREAD+THREAD_USP)
+
+ /* save non-scratch registers on stack */
+ SAVE_SWITCH_STACK
+
+ /* save current kernel stack pointer */
+ movel %sp,%a0@(TASK_THREAD+THREAD_KSP)
+
+ /* save floating point context */
+#ifndef CONFIG_M68KFPU_EMU_ONLY
+#ifdef CONFIG_M68KFPU_EMU
+ tstl m68k_fputype
+ jeq 3f
+#endif
+ fsave %a0@(TASK_THREAD+THREAD_FPSTATE)
+
+#if defined(CONFIG_M68060)
+#if !defined(CPU_M68060_ONLY)
+ btst #3,m68k_cputype+3
+ beqs 1f
+#endif
+ /* The 060 FPU keeps status in bits 15-8 of the first longword */
+ tstb %a0@(TASK_THREAD+THREAD_FPSTATE+2)
+ jeq 3f
+#if !defined(CPU_M68060_ONLY)
+ jra 2f
+#endif
+#endif /* CONFIG_M68060 */
+#if !defined(CPU_M68060_ONLY)
+1: tstb %a0@(TASK_THREAD+THREAD_FPSTATE)
+ jeq 3f
+#endif
+2: fmovemx %fp0-%fp7,%a0@(TASK_THREAD+THREAD_FPREG)
+ fmoveml %fpcr/%fpsr/%fpiar,%a0@(TASK_THREAD+THREAD_FPCNTL)
+3:
+#endif /* CONFIG_M68KFPU_EMU_ONLY */
+ /* Return previous task in %d1 */
+ movel %curptr,%d1
+
+ /* switch to new task (a1 contains new task) */
+ movel %a1,%curptr
+
+ /* restore floating point context */
+#ifndef CONFIG_M68KFPU_EMU_ONLY
+#ifdef CONFIG_M68KFPU_EMU
+ tstl m68k_fputype
+ jeq 4f
+#endif
+#if defined(CONFIG_M68060)
+#if !defined(CPU_M68060_ONLY)
+ btst #3,m68k_cputype+3
+ beqs 1f
+#endif
+ /* The 060 FPU keeps status in bits 15-8 of the first longword */
+ tstb %a1@(TASK_THREAD+THREAD_FPSTATE+2)
+ jeq 3f
+#if !defined(CPU_M68060_ONLY)
+ jra 2f
+#endif
+#endif /* CONFIG_M68060 */
+#if !defined(CPU_M68060_ONLY)
+1: tstb %a1@(TASK_THREAD+THREAD_FPSTATE)
+ jeq 3f
#endif
+2: fmovemx %a1@(TASK_THREAD+THREAD_FPREG),%fp0-%fp7
+ fmoveml %a1@(TASK_THREAD+THREAD_FPCNTL),%fpcr/%fpsr/%fpiar
+3: frestore %a1@(TASK_THREAD+THREAD_FPSTATE)
+4:
+#endif /* CONFIG_M68KFPU_EMU_ONLY */
+
+ /* restore the kernel stack pointer */
+ movel %a1@(TASK_THREAD+THREAD_KSP),%sp
+
+ /* restore non-scratch registers */
+ RESTORE_SWITCH_STACK
+
+ /* restore user stack pointer */
+ movel %a1@(TASK_THREAD+THREAD_USP),%a0
+ movel %a0,%usp
+
+ /* restore fs (sfc,%dfc) */
+ movew %a1@(TASK_THREAD+THREAD_FS),%a0
+ movec %a0,%sfc
+ movec %a0,%dfc
+
+ /* restore status register */
+ movew %a1@(TASK_THREAD+THREAD_SR),%sr
+
+ rts
+
+#endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
diff --git a/arch/m68k/kernel/entry_mm.S b/arch/m68k/kernel/entry_mm.S
deleted file mode 100644
index f29e73c..0000000
--- a/arch/m68k/kernel/entry_mm.S
+++ /dev/null
@@ -1,419 +0,0 @@
-/* -*- mode: asm -*-
- *
- * linux/arch/m68k/kernel/entry.S
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file README.legal in the main directory of this archive
- * for more details.
- *
- * Linux/m68k support by Hamish Macdonald
- *
- * 68060 fixes by Jesper Skov
- *
- */
-
-/*
- * entry.S contains the system-call and fault low-level handling routines.
- * This also contains the timer-interrupt handler, as well as all interrupts
- * and faults that can result in a task-switch.
- *
- * NOTE: This code handles signal-recognition, which happens every time
- * after a timer-interrupt and after each system call.
- *
- */
-
-/*
- * 12/03/96 Jes: Currently we only support m68k single-cpu systems, so
- * all pointers that used to be 'current' are now entry
- * number 0 in the 'current_set' list.
- *
- * 6/05/00 RZ: addedd writeback completion after return from sighandler
- * for 68040
- */
-
-#include <linux/linkage.h>
-#include <asm/entry.h>
-#include <asm/errno.h>
-#include <asm/setup.h>
-#include <asm/segment.h>
-#include <asm/traps.h>
-#include <asm/unistd.h>
-
-#include <asm/asm-offsets.h>
-
-.globl system_call, buserr, trap, resume
-.globl sys_call_table
-.globl sys_fork, sys_clone, sys_vfork
-.globl ret_from_interrupt, bad_interrupt
-.globl auto_irqhandler_fixup
-.globl user_irqvec_fixup
-
-.text
-ENTRY(buserr)
- SAVE_ALL_INT
- GET_CURRENT(%d0)
- movel %sp,%sp@- | stack frame pointer argument
- bsrl buserr_c
- addql #4,%sp
- jra .Lret_from_exception
-
-ENTRY(trap)
- SAVE_ALL_INT
- GET_CURRENT(%d0)
- movel %sp,%sp@- | stack frame pointer argument
- bsrl trap_c
- addql #4,%sp
- jra .Lret_from_exception
-
- | After a fork we jump here directly from resume,
- | so that %d1 contains the previous task
- | schedule_tail now used regardless of CONFIG_SMP
-ENTRY(ret_from_fork)
- movel %d1,%sp@-
- jsr schedule_tail
- addql #4,%sp
- jra .Lret_from_exception
-
-do_trace_entry:
- movel #-ENOSYS,%sp@(PT_OFF_D0)| needed for strace
- subql #4,%sp
- SAVE_SWITCH_STACK
- jbsr syscall_trace
- RESTORE_SWITCH_STACK
- addql #4,%sp
- movel %sp@(PT_OFF_ORIG_D0),%d0
- cmpl #NR_syscalls,%d0
- jcs syscall
-badsys:
- movel #-ENOSYS,%sp@(PT_OFF_D0)
- jra ret_from_syscall
-
-do_trace_exit:
- subql #4,%sp
- SAVE_SWITCH_STACK
- jbsr syscall_trace
- RESTORE_SWITCH_STACK
- addql #4,%sp
- jra .Lret_from_exception
-
-ENTRY(ret_from_signal)
- movel %curptr@(TASK_STACK),%a1
- tstb %a1@(TINFO_FLAGS+2)
- jge 1f
- jbsr syscall_trace
-1: RESTORE_SWITCH_STACK
- addql #4,%sp
-/* on 68040 complete pending writebacks if any */
-#ifdef CONFIG_M68040
- bfextu %sp@(PT_OFF_FORMATVEC){#0,#4},%d0
- subql #7,%d0 | bus error frame ?
- jbne 1f
- movel %sp,%sp@-
- jbsr berr_040cleanup
- addql #4,%sp
-1:
-#endif
- jra .Lret_from_exception
-
-ENTRY(system_call)
- SAVE_ALL_SYS
-
- GET_CURRENT(%d1)
- movel %d1,%a1
-
- | save top of frame
- movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0)
-
- | syscall trace?
- tstb %a1@(TINFO_FLAGS+2)
- jmi do_trace_entry
- cmpl #NR_syscalls,%d0
- jcc badsys
-syscall:
- jbsr @(sys_call_table,%d0:l:4)@(0)
- movel %d0,%sp@(PT_OFF_D0) | save the return value
-ret_from_syscall:
- |oriw #0x0700,%sr
- movel %curptr@(TASK_STACK),%a1
- movew %a1@(TINFO_FLAGS+2),%d0
- jne syscall_exit_work
-1: RESTORE_ALL
-
-syscall_exit_work:
- btst #5,%sp@(PT_OFF_SR) | check if returning to kernel
- bnes 1b | if so, skip resched, signals
- lslw #1,%d0
- jcs do_trace_exit
- jmi do_delayed_trace
- lslw #8,%d0
- jne do_signal_return
- pea resume_userspace
- jra schedule
-
-
-ENTRY(ret_from_exception)
-.Lret_from_exception:
- btst #5,%sp@(PT_OFF_SR) | check if returning to kernel
- bnes 1f | if so, skip resched, signals
- | only allow interrupts when we are really the last one on the
- | kernel stack, otherwise stack overflow can occur during
- | heavy interrupt load
- andw #ALLOWINT,%sr
-
-resume_userspace:
- movel %curptr@(TASK_STACK),%a1
- moveb %a1@(TINFO_FLAGS+3),%d0
- jne exit_work
-1: RESTORE_ALL
-
-exit_work:
- | save top of frame
- movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0)
- lslb #1,%d0
- jne do_signal_return
- pea resume_userspace
- jra schedule
-
-
-do_signal_return:
- |andw #ALLOWINT,%sr
- subql #4,%sp | dummy return address
- SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- bsrl do_notify_resume
- addql #4,%sp
- RESTORE_SWITCH_STACK
- addql #4,%sp
- jbra resume_userspace
-
-do_delayed_trace:
- bclr #7,%sp@(PT_OFF_SR) | clear trace bit in SR
- pea 1 | send SIGTRAP
- movel %curptr,%sp@-
- pea LSIGTRAP
- jbsr send_sig
- addql #8,%sp
- addql #4,%sp
- jbra resume_userspace
-
-
-/* This is the main interrupt handler for autovector interrupts */
-
-ENTRY(auto_inthandler)
- SAVE_ALL_INT
- GET_CURRENT(%d0)
- movel %d0,%a1
- addqb #1,%a1@(TINFO_PREEMPT+1)
- | put exception # in d0
- bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0
- subw #VEC_SPUR,%d0
-
- movel %sp,%sp@-
- movel %d0,%sp@- | put vector # on stack
-auto_irqhandler_fixup = . + 2
- jsr do_IRQ | process the IRQ
- addql #8,%sp | pop parameters off stack
-
-ret_from_interrupt:
- movel %curptr@(TASK_STACK),%a1
- subqb #1,%a1@(TINFO_PREEMPT+1)
- jeq ret_from_last_interrupt
-2: RESTORE_ALL
-
- ALIGN
-ret_from_last_interrupt:
- moveq #(~ALLOWINT>>8)&0xff,%d0
- andb %sp@(PT_OFF_SR),%d0
- jne 2b
-
- /* check if we need to do software interrupts */
- tstl irq_stat+CPUSTAT_SOFTIRQ_PENDING
- jeq .Lret_from_exception
- pea ret_from_exception
- jra do_softirq
-
-/* Handler for user defined interrupt vectors */
-
-ENTRY(user_inthandler)
- SAVE_ALL_INT
- GET_CURRENT(%d0)
- movel %d0,%a1
- addqb #1,%a1@(TINFO_PREEMPT+1)
- | put exception # in d0
- bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0
-user_irqvec_fixup = . + 2
- subw #VEC_USER,%d0
-
- movel %sp,%sp@-
- movel %d0,%sp@- | put vector # on stack
- jsr do_IRQ | process the IRQ
- addql #8,%sp | pop parameters off stack
-
- movel %curptr@(TASK_STACK),%a1
- subqb #1,%a1@(TINFO_PREEMPT+1)
- jeq ret_from_last_interrupt
- RESTORE_ALL
-
-/* Handler for uninitialized and spurious interrupts */
-
-ENTRY(bad_inthandler)
- SAVE_ALL_INT
- GET_CURRENT(%d0)
- movel %d0,%a1
- addqb #1,%a1@(TINFO_PREEMPT+1)
-
- movel %sp,%sp@-
- jsr handle_badint
- addql #4,%sp
-
- movel %curptr@(TASK_STACK),%a1
- subqb #1,%a1@(TINFO_PREEMPT+1)
- jeq ret_from_last_interrupt
- RESTORE_ALL
-
-
-ENTRY(sys_fork)
- SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr m68k_fork
- addql #4,%sp
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(sys_clone)
- SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr m68k_clone
- addql #4,%sp
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(sys_vfork)
- SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr m68k_vfork
- addql #4,%sp
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(sys_sigreturn)
- SAVE_SWITCH_STACK
- jbsr do_sigreturn
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(sys_rt_sigreturn)
- SAVE_SWITCH_STACK
- jbsr do_rt_sigreturn
- RESTORE_SWITCH_STACK
- rts
-
-resume:
- /*
- * Beware - when entering resume, prev (the current task) is
- * in a0, next (the new task) is in a1,so don't change these
- * registers until their contents are no longer needed.
- */
-
- /* save sr */
- movew %sr,%a0@(TASK_THREAD+THREAD_SR)
-
- /* save fs (sfc,%dfc) (may be pointing to kernel memory) */
- movec %sfc,%d0
- movew %d0,%a0@(TASK_THREAD+THREAD_FS)
-
- /* save usp */
- /* it is better to use a movel here instead of a movew 8*) */
- movec %usp,%d0
- movel %d0,%a0@(TASK_THREAD+THREAD_USP)
-
- /* save non-scratch registers on stack */
- SAVE_SWITCH_STACK
-
- /* save current kernel stack pointer */
- movel %sp,%a0@(TASK_THREAD+THREAD_KSP)
-
- /* save floating point context */
-#ifndef CONFIG_M68KFPU_EMU_ONLY
-#ifdef CONFIG_M68KFPU_EMU
- tstl m68k_fputype
- jeq 3f
-#endif
- fsave %a0@(TASK_THREAD+THREAD_FPSTATE)
-
-#if defined(CONFIG_M68060)
-#if !defined(CPU_M68060_ONLY)
- btst #3,m68k_cputype+3
- beqs 1f
-#endif
- /* The 060 FPU keeps status in bits 15-8 of the first longword */
- tstb %a0@(TASK_THREAD+THREAD_FPSTATE+2)
- jeq 3f
-#if !defined(CPU_M68060_ONLY)
- jra 2f
-#endif
-#endif /* CONFIG_M68060 */
-#if !defined(CPU_M68060_ONLY)
-1: tstb %a0@(TASK_THREAD+THREAD_FPSTATE)
- jeq 3f
-#endif
-2: fmovemx %fp0-%fp7,%a0@(TASK_THREAD+THREAD_FPREG)
- fmoveml %fpcr/%fpsr/%fpiar,%a0@(TASK_THREAD+THREAD_FPCNTL)
-3:
-#endif /* CONFIG_M68KFPU_EMU_ONLY */
- /* Return previous task in %d1 */
- movel %curptr,%d1
-
- /* switch to new task (a1 contains new task) */
- movel %a1,%curptr
-
- /* restore floating point context */
-#ifndef CONFIG_M68KFPU_EMU_ONLY
-#ifdef CONFIG_M68KFPU_EMU
- tstl m68k_fputype
- jeq 4f
-#endif
-#if defined(CONFIG_M68060)
-#if !defined(CPU_M68060_ONLY)
- btst #3,m68k_cputype+3
- beqs 1f
-#endif
- /* The 060 FPU keeps status in bits 15-8 of the first longword */
- tstb %a1@(TASK_THREAD+THREAD_FPSTATE+2)
- jeq 3f
-#if !defined(CPU_M68060_ONLY)
- jra 2f
-#endif
-#endif /* CONFIG_M68060 */
-#if !defined(CPU_M68060_ONLY)
-1: tstb %a1@(TASK_THREAD+THREAD_FPSTATE)
- jeq 3f
-#endif
-2: fmovemx %a1@(TASK_THREAD+THREAD_FPREG),%fp0-%fp7
- fmoveml %a1@(TASK_THREAD+THREAD_FPCNTL),%fpcr/%fpsr/%fpiar
-3: frestore %a1@(TASK_THREAD+THREAD_FPSTATE)
-4:
-#endif /* CONFIG_M68KFPU_EMU_ONLY */
-
- /* restore the kernel stack pointer */
- movel %a1@(TASK_THREAD+THREAD_KSP),%sp
-
- /* restore non-scratch registers */
- RESTORE_SWITCH_STACK
-
- /* restore user stack pointer */
- movel %a1@(TASK_THREAD+THREAD_USP),%a0
- movel %a0,%usp
-
- /* restore fs (sfc,%dfc) */
- movew %a1@(TASK_THREAD+THREAD_FS),%a0
- movec %a0,%sfc
- movec %a0,%dfc
-
- /* restore status register */
- movew %a1@(TASK_THREAD+THREAD_SR),%sr
-
- rts
-
diff --git a/arch/m68k/kernel/entry_no.S b/arch/m68k/kernel/entry_no.S
deleted file mode 100644
index d80cba4..0000000
--- a/arch/m68k/kernel/entry_no.S
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
- * linux/arch/m68knommu/kernel/entry.S
- *
- * Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
- * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>,
- * Kenneth Albanowski <kjahds@kjahds.com>,
- * Copyright (C) 2000 Lineo Inc. (www.lineo.com)
- *
- * Based on:
- *
- * linux/arch/m68k/kernel/entry.S
- *
- * Copyright (C) 1991, 1992 Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file README.legal in the main directory of this archive
- * for more details.
- *
- * Linux/m68k support by Hamish Macdonald
- *
- * 68060 fixes by Jesper Skov
- * ColdFire support by Greg Ungerer (gerg@snapgear.com)
- * 5307 fixes by David W. Miller
- * linux 2.4 support David McCullough <davidm@snapgear.com>
- */
-
-#include <linux/linkage.h>
-#include <asm/errno.h>
-#include <asm/setup.h>
-#include <asm/segment.h>
-#include <asm/asm-offsets.h>
-#include <asm/entry.h>
-#include <asm/unistd.h>
-
-.text
-
-.globl buserr
-.globl trap
-.globl ret_from_exception
-.globl ret_from_signal
-.globl sys_fork
-.globl sys_clone
-.globl sys_vfork
-
-ENTRY(buserr)
- SAVE_ALL_INT
- GET_CURRENT(%d0)
- movel %sp,%sp@- /* stack frame pointer argument */
- jsr buserr_c
- addql #4,%sp
- jra ret_from_exception
-
-ENTRY(trap)
- SAVE_ALL_INT
- GET_CURRENT(%d0)
- movel %sp,%sp@- /* stack frame pointer argument */
- jsr trap_c
- addql #4,%sp
- jra ret_from_exception
-
-#ifdef TRAP_DBG_INTERRUPT
-
-.globl dbginterrupt
-ENTRY(dbginterrupt)
- SAVE_ALL_INT
- GET_CURRENT(%d0)
- movel %sp,%sp@- /* stack frame pointer argument */
- jsr dbginterrupt_c
- addql #4,%sp
- jra ret_from_exception
-#endif
-
-ENTRY(reschedule)
- /* save top of frame */
- pea %sp@
- jbsr set_esp0
- addql #4,%sp
- pea ret_from_exception
- jmp schedule
-
-ENTRY(ret_from_fork)
- movel %d1,%sp@-
- jsr schedule_tail
- addql #4,%sp
- jra ret_from_exception
-
-ENTRY(sys_fork)
- SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr m68k_fork
- addql #4,%sp
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(sys_vfork)
- SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr m68k_vfork
- addql #4,%sp
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(sys_clone)
- SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr m68k_clone
- addql #4,%sp
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(sys_sigreturn)
- SAVE_SWITCH_STACK
- jbsr do_sigreturn
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(sys_rt_sigreturn)
- SAVE_SWITCH_STACK
- jbsr do_rt_sigreturn
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(ret_from_user_signal)
- moveq #__NR_sigreturn,%d0
- trap #0
-
-ENTRY(ret_from_user_rt_signal)
- movel #__NR_rt_sigreturn,%d0
- trap #0
-
diff --git a/arch/m68k/kernel/pcibios.c b/arch/m68k/kernel/pcibios.c
new file mode 100644
index 0000000..b2988aa
--- /dev/null
+++ b/arch/m68k/kernel/pcibios.c
@@ -0,0 +1,109 @@
+/*
+ * pci.c -- basic PCI support code
+ *
+ * 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.
+ *
+ * (C) Copyright 2011, Greg Ungerer <gerg@uclinux.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+
+/*
+ * From arch/i386/kernel/pci-i386.c:
+ *
+ * We need to avoid collisions with `mirrored' VGA ports
+ * and other strange ISA hardware, so we always want the
+ * addresses to be allocated in the 0x000-0x0ff region
+ * modulo 0x400.
+ *
+ * Why? Because some silly external IO cards only decode
+ * the low 10 bits of the IO address. The 0x00-0xff region
+ * is reserved for motherboard devices that decode all 16
+ * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
+ * but we want to try to avoid allocating at 0x2900-0x2bff
+ * which might be mirrored at 0x0100-0x03ff..
+ */
+resource_size_t pcibios_align_resource(void *data, const struct resource *res,
+ resource_size_t size, resource_size_t align)
+{
+ resource_size_t start = res->start;
+
+ if ((res->flags & IORESOURCE_IO) && (start & 0x300))
+ start = (start + 0x3ff) & ~0x3ff;
+
+ start = (start + align - 1) & ~(align - 1);
+
+ return start;
+}
+
+/*
+ * This is taken from the ARM code for this.
+ */
+int pcibios_enable_device(struct pci_dev *dev, int mask)
+{
+ struct resource *r;
+ u16 cmd, newcmd;
+ int idx;
+
+ pci_read_config_word(dev, PCI_COMMAND, &cmd);
+ newcmd = cmd;
+
+ for (idx = 0; idx < 6; idx++) {
+ /* Only set up the requested stuff */
+ if (!(mask & (1 << idx)))
+ continue;
+
+ r = dev->resource + idx;
+ if (!r->start && r->end) {
+ pr_err(KERN_ERR "PCI: Device %s not available because of resource collisions\n",
+ pci_name(dev));
+ return -EINVAL;
+ }
+ if (r->flags & IORESOURCE_IO)
+ newcmd |= PCI_COMMAND_IO;
+ if (r->flags & IORESOURCE_MEM)
+ newcmd |= PCI_COMMAND_MEMORY;
+ }
+
+ /*
+ * Bridges (eg, cardbus bridges) need to be fully enabled
+ */
+ if ((dev->class >> 16) == PCI_BASE_CLASS_BRIDGE)
+ newcmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
+
+
+ if (newcmd != cmd) {
+ pr_info("PCI: enabling device %s (0x%04x -> 0x%04x)\n",
+ pci_name(dev), cmd, newcmd);
+ pci_write_config_word(dev, PCI_COMMAND, newcmd);
+ }
+ return 0;
+}
+
+void pcibios_update_irq(struct pci_dev *dev, int irq)
+{
+ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
+}
+
+void __devinit pcibios_fixup_bus(struct pci_bus *bus)
+{
+ struct pci_dev *dev;
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 8);
+ pci_write_config_byte(dev, PCI_LATENCY_TIMER, 32);
+ }
+}
+
+char __devinit *pcibios_setup(char *str)
+{
+ return str;
+}
+
OpenPOWER on IntegriCloud