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h8300 entry.S update

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Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yoshinori Sato 2007-07-15 23:38:36 -07:00 committed by Linus Torvalds
parent 542f739d12
commit 2fea299f74
8 changed files with 199 additions and 460 deletions
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3
arch/h8300/kernel/Makefile
View File

@ -6,6 +6,7 @@ extra-y := vmlinux.lds
obj-y := process.o traps.o ptrace.o irq.o \
sys_h8300.o time.o semaphore.o signal.o \
setup.o gpio.o init_task.o syscalls.o
setup.o gpio.o init_task.o syscalls.o \
entry.o
obj-$(CONFIG_MODULES) += module.o h8300_ksyms.o

310
arch/h8300/platform/h8s/entry.S → arch/h8300/kernel/entry.S
View File

@ -1,11 +1,10 @@
/* -*- mode: asm -*-
*
* linux/arch/h8300/platform/h8s/entry.S
* linux/arch/h8300/platform/h8300h/entry.S
*
* Yoshinori Sato <ysato@users.sourceforge.jp>
* David McCullough <davidm@snapgear.com>
*
* fairly heavy changes to fix syscall args and signal processing
* by David McCullough <davidm@snapgear.com>
*/
/*
@ -23,13 +22,66 @@
#include <asm/thread_info.h>
#include <asm/errno.h>
#if defined(CONFIG_CPU_H8300H)
#define USERRET 8
INTERRUPTS = 64
.h8300h
.macro SHLL2 reg
shll.l \reg
shll.l \reg
.endm
.macro SHLR2 reg
shlr.l \reg
shlr.l \reg
.endm
.macro SAVEREGS
mov.l er0,@-sp
mov.l er1,@-sp
mov.l er2,@-sp
mov.l er3,@-sp
.endm
.macro RESTOREREGS
mov.l @sp+,er3
mov.l @sp+,er2
.endm
.macro SAVEEXR
.endm
.macro RESTOREEXR
.endm
#endif
#if defined(CONFIG_CPU_H8S)
#define USERRET 10
#define USEREXR 8
INTERRUPTS = 128
.h8300s
.macro SHLL2 reg
shll.l #2,\reg
.endm
.macro SHLR2 reg
shlr.l #2,\reg
.endm
.macro SAVEREGS
stm.l er0-er3,@-sp
.endm
.macro RESTOREREGS
ldm.l @sp+,er2-er3
.endm
.macro SAVEEXR
mov.w @(USEREXR:16,er0),r1
mov.w r1,@(LEXR-LER3:16,sp) /* copy EXR */
.endm
.macro RESTOREEXR
mov.w @(LEXR-LER1:16,sp),r1 /* restore EXR */
mov.b r1l,r1h
mov.w r1,@(USEREXR:16,er0)
.endm
#endif
/* CPU context save/restore macros. */
.macro SAVE_ALL
mov.l er0,@-sp
stc ccr,r0l /* check kernel mode */
btst #4,r0l
bne 5f
@ -39,42 +91,38 @@
mov.l @sp,er0 /* restore saved er0 */
orc #0x10,ccr /* switch kernel stack */
mov.l @SYMBOL_NAME(sw_ksp),sp
sub.l #(LRET-LORIG),sp /* allocate LORIG - LRET */
stm.l er0-er3,@-sp
mov.l @SYMBOL_NAME(sw_usp),er0
mov.l @(10:16,er0),er1 /* copy the RET addr */
mov.l er1,@(LRET-LER3:16,sp)
mov.w @(8:16,er0),r1
mov.w r1,@(LEXR-LER3:16,sp) /* copy EXR */
sub.l #(LRET-LORIG),sp /* allocate LORIG - LRET */
SAVEREGS
mov.l @SYMBOL_NAME(sw_usp),er0
mov.l @(USERRET:16,er0),er1 /* copy the RET addr */
mov.l er1,@(LRET-LER3:16,sp)
SAVEEXR
mov.w e1,r1 /* e1 highbyte = ccr */
and #0xef,r1h /* mask mode? flag */
sub.w r0,r0
mov.b r1h,r0l
mov.w r0,@(LCCR-LER3:16,sp) /* copy ccr */
mov.l @(LORIG-LER3:16,sp),er0
mov.l er0,@(LER0-LER3:16,sp) /* copy ER0 */
mov.w e1,r1 /* e1 highbyte = ccr */
and #0xef,r1h /* mask mode? flag */
bra 6f
5:
/* kernel mode */
mov.l @sp,er0 /* restore saved er0 */
subs #2,sp /* set dummy ccr */
stm.l er0-er3,@-sp
SAVEREGS
mov.w @(LRET-LER3:16,sp),r1 /* copy old ccr */
6:
mov.b r1h,r1l
mov.b #0,r1h
mov.w r1,@(LCCR-LER3:16,sp)
6:
mov.w r1,@(LCCR-LER3:16,sp) /* set ccr */
mov.l er6,@-sp /* syscall arg #6 */
mov.l er5,@-sp /* syscall arg #5 */
mov.l er4,@-sp /* syscall arg #4 */
.endm
.endm /* r1 = ccr */
.macro RESTORE_ALL
mov.l @sp+,er4
mov.l @sp+,er5
mov.l @sp+,er6
ldm.l @sp+,er2-er3
RESTOREREGS
mov.w @(LCCR-LER1:16,sp),r0 /* check kernel mode */
btst #4,r0l
bne 7f
@ -83,18 +131,16 @@
mov.l @SYMBOL_NAME(sw_usp),er0
mov.l @(LER0-LER1:16,sp),er1 /* restore ER0 */
mov.l er1,@er0
mov.w @(LEXR-LER1:16,sp),r1 /* restore EXR */
mov.b r1l,r1h
mov.w r1,@(8:16,er0)
RESTOREEXR
mov.w @(LCCR-LER1:16,sp),r1 /* restore the RET addr */
mov.b r1l,r1h
mov.b @(LRET+1-LER1:16,sp),r1l
mov.w r1,e1
mov.w @(LRET+2-LER1:16,sp),r1
mov.l er1,@(10:16,er0)
mov.l er1,@(USERRET:16,er0)
mov.l @sp+,er1
add.l #(LRET-LER1),sp /* remove LORIG - LRET */
add.l #(LRET-LER1),sp /* remove LORIG - LRET */
mov.l sp,@SYMBOL_NAME(sw_ksp)
andc #0xef,ccr /* switch to user mode */
mov.l er0,sp
@ -108,7 +154,7 @@
adds #4,sp /* remove the sw created LVEC */
rte
.endm
.globl SYMBOL_NAME(system_call)
.globl SYMBOL_NAME(ret_from_exception)
.globl SYMBOL_NAME(ret_from_fork)
@ -116,16 +162,25 @@
.globl SYMBOL_NAME(interrupt_redirect_table)
.globl SYMBOL_NAME(sw_ksp),SYMBOL_NAME(sw_usp)
.globl SYMBOL_NAME(resume)
.globl SYMBOL_NAME(trace_break)
.globl SYMBOL_NAME(interrupt_entry)
INTERRUPTS = 128
.globl SYMBOL_NAME(trace_break)
#if defined(CONFIG_ROMKERNEL)
.section .int_redirect,"ax"
SYMBOL_NAME_LABEL(interrupt_redirect_table)
#if defined(CONFIG_CPU_H8300H)
.rept 7
.long 0
.endr
#endif
#if defined(CONFIG_CPU_H8S)
.rept 5
.long 0
.endr
jmp @SYMBOL_NAME(trace_break)
.long 0
#endif
jsr @SYMBOL_NAME(interrupt_entry) /* NMI */
jmp @SYMBOL_NAME(system_call) /* TRAPA #0 (System call) */
.long 0
@ -141,20 +196,20 @@ SYMBOL_NAME_LABEL(interrupt_redirect_table)
SYMBOL_NAME_LABEL(interrupt_redirect_table)
.space 4
#endif
.section .text
.align 2
SYMBOL_NAME_LABEL(interrupt_entry)
SAVE_ALL
mov.w @(LCCR,sp),r0
btst #4,r0l
mov.l sp,er0
add.l #LVEC,er0
btst #4,r1l
bne 1f
/* user LVEC */
mov.l @SYMBOL_NAME(sw_usp),er0
mov.l @(4:16,er0),er0
bra 2f
adds #4,er0
1:
mov.l @(LVEC:16,sp),er0
2:
mov.l @er0,er0 /* LVEC address */
#if defined(CONFIG_ROMKERNEL)
sub.l #SYMBOL_NAME(interrupt_redirect_table),er0
#endif
@ -162,69 +217,62 @@ SYMBOL_NAME_LABEL(interrupt_entry)
mov.l @SYMBOL_NAME(interrupt_redirect_table),er1
sub.l er1,er0
#endif
shlr.l #2,er0
SHLR2 er0
dec.l #1,er0
mov.l sp,er1
subs #4,er1 /* adjust ret_pc */
jsr @SYMBOL_NAME(process_int)
mov.l @SYMBOL_NAME(irq_stat)+CPUSTAT_SOFTIRQ_PENDING,er0
beq 1f
jsr @SYMBOL_NAME(do_softirq)
1:
jmp @SYMBOL_NAME(ret_from_exception)
jsr @SYMBOL_NAME(do_IRQ)
jmp @SYMBOL_NAME(ret_from_interrupt)
SYMBOL_NAME_LABEL(system_call)
subs #4,sp /* dummy LVEC */
SAVE_ALL
andc #0x7f,ccr
mov.l er0,er4
mov.l #-ENOSYS,er0
mov.l er0,@(LER0:16,sp)
/* save top of frame */
mov.l sp,er0
jsr @SYMBOL_NAME(set_esp0)
cmp.l #NR_syscalls,er4
bcc SYMBOL_NAME(ret_from_exception):16
shll.l #2,er4
mov.l #SYMBOL_NAME(sys_call_table),er0
add.l er4,er0
mov.l @er0,er0
mov.l er0,er4
beq SYMBOL_NAME(ret_from_exception):16
mov.l sp,er2
and.w #0xe000,r2
mov.b @((TASK_FLAGS+3-(TIF_SYSCALL_TRACE >> 3)):16,er2),r2l
mov.b @((TI_FLAGS+3-(TIF_SYSCALL_TRACE >> 3)):16,er2),r2l
btst #(TIF_SYSCALL_TRACE & 7),r2l
mov.l @(LER1:16,sp),er0
mov.l @(LER2:16,sp),er1
mov.l @(LER3:16,sp),er2
andc #0x7f,ccr
jsr @er4
mov.l er0,@(LER0:16,sp) /* save the return value */
#if defined(CONFIG_SYSCALL_PRINT)
jsr @SYMBOL_NAME(syscall_print)
#endif
bra SYMBOL_NAME(ret_from_exception):8
beq 1f
jsr @SYMBOL_NAME(do_syscall_trace)
1:
jsr SYMBOL_NAME(syscall_trace)
cmp.l #NR_syscalls,er4
bcc badsys
SHLL2 er4
mov.l #SYMBOL_NAME(sys_call_table),er0
add.l er4,er0
mov.l @er0,er4
beq SYMBOL_NAME(ret_from_exception):16
mov.l @(LER1:16,sp),er0
mov.l @(LER2:16,sp),er1
mov.l @(LER3:16,sp),er2
jsr @er4
mov.l er0,@(LER0:16,sp) /* save the return value */
jsr @SYMBOL_NAME(syscall_trace)
bra SYMBOL_NAME(ret_from_exception):8
mov.l sp,er2
and.w #0xe000,r2
mov.b @((TI_FLAGS+3-(TIF_SYSCALL_TRACE >> 3)):16,er2),r2l
btst #(TIF_SYSCALL_TRACE & 7),r2l
beq 2f
jsr @SYMBOL_NAME(do_syscall_trace)
2:
#if defined(CONFIG_SYSCALL_PRINT)
jsr @SYMBOL_NAME(syscall_print)
#endif
orc #0x80,ccr
bra resume_userspace
SYMBOL_NAME_LABEL(ret_from_fork)
mov.l er2,er0
jsr @SYMBOL_NAME(schedule_tail)
bra SYMBOL_NAME(ret_from_exception):8
badsys:
mov.l #-ENOSYS,er0
mov.l er0,@(LER0:16,sp)
bra resume_userspace
SYMBOL_NAME_LABEL(reschedule)
/* save top of frame */
mov.l sp,er0
jsr @SYMBOL_NAME(set_esp0)
jsr @SYMBOL_NAME(schedule)
#if !defined(CONFIG_PREEMPT)
#define resume_kernel restore_all
#endif
SYMBOL_NAME_LABEL(ret_from_exception)
#if defined(CONFIG_PREEMPT)
@ -232,58 +280,68 @@ SYMBOL_NAME_LABEL(ret_from_exception)
#endif
SYMBOL_NAME_LABEL(ret_from_interrupt)
mov.b @(LCCR+1:16,sp),r0l
btst #4,r0l /* check if returning to kernel */
bne done:8 /* if so, skip resched, signals */
btst #4,r0l
bne resume_kernel:8 /* return from kernel */
resume_userspace:
andc #0x7f,ccr
mov.l sp,er4
and.w #0xe000,r4
and.w #0xe000,r4 /* er4 <- current thread info */
mov.l @(TI_FLAGS:16,er4),er1
and.l #_TIF_WORK_MASK,er1
beq done:8
1:
mov.l @(TI_FLAGS:16,er4),er1
beq restore_all:8
work_pending:
btst #TIF_NEED_RESCHED,r1l
bne SYMBOL_NAME(reschedule):16
bne work_resched:8
/* work notifysig */
mov.l sp,er0
subs #4,er0 /* adjust retpc */
mov.l er2,er1
jsr @SYMBOL_NAME(do_signal)
#if defined(CONFIG_PREEMPT)
bra done:8 /* userspace thoru */
3:
btst #4,r0l
beq done:8 /* userspace thoru */
4:
mov.l @(TI_PRE_COUNT:16,er4),er1
bne done:8
mov.l @(TI_FLAGS:16,er4),er1
btst #TIF_NEED_RESCHED,r1l
beq done:8
mov.b r0l,r0l
bpl done:8 /* interrupt off (exception path?) */
mov.l #PREEMPT_ACTIVE,er1
mov.l er1,@(TI_PRE_COUNT:16,er4)
andc #0x7f,ccr
subs #4,er0 /* er0: pt_regs */
jsr @SYMBOL_NAME(do_notify_resume)
bra restore_all:8
work_resched:
mov.l sp,er0
jsr @SYMBOL_NAME(set_esp0)
jsr @SYMBOL_NAME(schedule)
sub.l er1,er1
mov.l er1,@(TI_PRE_COUNT:16,er4)
orc #0x80,ccr
bra 4b:8
#endif
done:
bra resume_userspace:8
restore_all:
RESTORE_ALL /* Does RTE */
#if defined(CONFIG_PREEMPT)
resume_kernel:
mov.l @(TI_PRE_COUNT:16,er4),er0
bne restore_all:8
need_resched:
mov.l @(TI_FLAGS:16,er4),er0
btst #TIF_NEED_RESCHED,r0l
beq restore_all:8
mov.b @(LCCR+1:16,sp),r0l /* Interrupt Enabled? */
bmi restore_all:8
mov.l #PREEMPT_ACTIVE,er0
mov.l er0,@(TI_PRE_COUNT:16,er4)
andc #0x7f,ccr
mov.l sp,er0
jsr @SYMBOL_NAME(set_esp0)
jsr @SYMBOL_NAME(schedule)
orc #0x80,ccr
bra need_resched:8
#endif
SYMBOL_NAME_LABEL(ret_from_fork)
mov.l er2,er0
jsr @SYMBOL_NAME(schedule_tail)
jmp @SYMBOL_NAME(ret_from_exception)
SYMBOL_NAME_LABEL(resume)
/*
* er0 = prev
* er1 = next
* return last in er2
* Beware - when entering resume, offset of tss is in d1,
* prev (the current task) is in a0, next (the new task)
* is in a1 and d2.b is non-zero if the mm structure is
* shared between the tasks, so don't change these
* registers until their contents are no longer needed.
*/
/* save sr */
sub.w r3,r3
stc ccr,r3l
stc exr,r3h
mov.w r3,@(THREAD_CCR+2:16,er0)
/* disable interrupts */
@ -291,41 +349,45 @@ SYMBOL_NAME_LABEL(resume)
mov.l @SYMBOL_NAME(sw_usp),er3
mov.l er3,@(THREAD_USP:16,er0)
mov.l sp,@(THREAD_KSP:16,er0)
/* Skip address space switching if they are the same. */
/* FIXME: what did we hack out of here, this does nothing! */
mov.l @(THREAD_USP:16,er1),er0
mov.l er0,@SYMBOL_NAME(sw_usp)
mov.l @(THREAD_KSP:16,er1),sp
/* restore status register */
mov.w @(THREAD_CCR+2:16,er1),r3
ldc r3l,ccr
ldc r3h,exr
rts
SYMBOL_NAME_LABEL(trace_break)
subs #4,sp /* dummy LVEC */
subs #4,sp
SAVE_ALL
sub.l er1,er1
dec.l #1,er1
mov.l er1,@(LORIG,sp)
mov.l er1,@(LORIG,sp)
mov.l sp,er0
jsr @SYMBOL_NAME(set_esp0)
mov.l @SYMBOL_NAME(sw_usp),er0
mov.l @er0,er1
mov.w @(-2:16,er1),r2
cmp.w #0x5730,r2
beq 1f
subs #2,er1
mov.l er1,@er0
mov.l er1,@er0
1:
and.w #0xff,e1
mov.l er1,er0
jsr @SYMBOL_NAME(trace_trap)
jmp @SYMBOL_NAME(ret_from_exception)
jmp @SYMBOL_NAME(ret_from_exception)
.section .bss
SYMBOL_NAME_LABEL(sw_ksp)
.space 4
.space 4
SYMBOL_NAME_LABEL(sw_usp)
.space 4
.space 4
.end

2
arch/h8300/kernel/ptrace.c
View File

@ -219,7 +219,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
return ret;
}
asmlinkage void syscall_trace(void)
asmlinkage void do_syscall_trace(void)
{
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;

6
arch/h8300/kernel/signal.c
View File

@ -547,3 +547,9 @@ asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset)
}
return 0;
}
asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags)
{
if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
do_signal(regs, NULL);
}

2
arch/h8300/platform/h8300h/Makefile
View File

@ -4,4 +4,4 @@
# Reuse any files we can from the H8/300H
#
obj-y := entry.o irq_pin.o ptrace_h8300h.o
obj-y := irq_pin.o ptrace_h8300h.o

332
arch/h8300/platform/h8300h/entry.S
View File

@ -1,332 +0,0 @@
/* -*- mode: asm -*-
*
* linux/arch/h8300/platform/h8300h/entry.S
*
* Yoshinori Sato <ysato@users.sourceforge.jp>
* David McCullough <davidm@snapgear.com>
*
*/
/*
* entry.S
* include exception/interrupt gateway
* system call entry
*/
#include <linux/sys.h>
#include <asm/unistd.h>
#include <asm/setup.h>
#include <asm/segment.h>
#include <asm/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#include <asm/errno.h>
.h8300h
/* CPU context save/restore macros. */
.macro SAVE_ALL
mov.l er0,@-sp
stc ccr,r0l /* check kernel mode */
btst #4,r0l
bne 5f
mov.l sp,@SYMBOL_NAME(sw_usp) /* user mode */
mov.l @sp,er0
orc #0x10,ccr
mov.l @SYMBOL_NAME(sw_ksp),sp
sub.l #(LRET-LORIG),sp /* allocate LORIG - LRET */
mov.l er0,@-sp
mov.l er1,@-sp
mov.l @SYMBOL_NAME(sw_usp),er0
mov.l @(8:16,er0),er1 /* copy the RET addr */
mov.l er1,@(LRET-LER1:16,sp)
mov.w e1,r1 /* e1 highbyte = ccr */
and #0xef,r1h /* mask mode? flag */
sub.w r0,r0
mov.b r1h,r0l
mov.w r0,@(LCCR-LER1:16,sp) /* copy ccr */
mov.l @(LORIG-LER1:16,sp),er0
mov.l er0,@(LER0-LER1:16,sp) /* copy ER0 */
bra 6f
5:
mov.l @sp,er0 /* kernel mode */
subs #2,sp /* dummy ccr */
mov.l er0,@-sp
mov.l er1,@-sp
mov.w @(LRET-LER1:16,sp),r1 /* copy old ccr */
mov.b r1h,r1l
mov.b #0,r1h
mov.w r1,@(LCCR-LER1:16,sp) /* set ccr */
6:
mov.l er2,@-sp
mov.l er3,@-sp
mov.l er6,@-sp /* syscall arg #6 */
mov.l er5,@-sp /* syscall arg #5 */
mov.l er4,@-sp /* syscall arg #4 */
.endm
.macro RESTORE_ALL
mov.l @sp+,er4
mov.l @sp+,er5
mov.l @sp+,er6
mov.l @sp+,er3
mov.l @sp+,er2
mov.w @(LCCR-LER1:16,sp),r0 /* check kernel mode */
btst #4,r0l
bne 7f
orc #0x80,ccr
mov.l @SYMBOL_NAME(sw_usp),er0
mov.l @(LER0-LER1:16,sp),er1 /* restore ER0 */
mov.l er1,@er0
mov.w @(LCCR-LER1:16,sp),r1 /* restore the RET addr */
mov.b r1l,r1h
mov.b @(LRET+1-LER1:16,sp),r1l
mov.w r1,e1
mov.w @(LRET+2-LER1:16,sp),r1
mov.l er1,@(8:16,er0)
mov.l @sp+,er1
add.l #(LRET-LER1),sp /* remove LORIG - LRET */
mov.l sp,@SYMBOL_NAME(sw_ksp)
mov.l er0,sp
bra 8f
7:
mov.l @sp+,er1
adds #4,sp
adds #2,sp
8:
mov.l @sp+,er0
adds #4,sp /* remove the sw created LVEC */
rte
.endm
.globl SYMBOL_NAME(system_call)
.globl SYMBOL_NAME(ret_from_exception)
.globl SYMBOL_NAME(ret_from_fork)
.globl SYMBOL_NAME(ret_from_interrupt)
.globl SYMBOL_NAME(interrupt_redirect_table)
.globl SYMBOL_NAME(sw_ksp),SYMBOL_NAME(sw_usp)
.globl SYMBOL_NAME(resume)
.globl SYMBOL_NAME(interrupt_redirect_table)
.globl SYMBOL_NAME(interrupt_entry)
.globl SYMBOL_NAME(system_call)
.globl SYMBOL_NAME(trace_break)
#if defined(CONFIG_ROMKERNEL)
INTERRUPTS = 64
.section .int_redirect,"ax"
SYMBOL_NAME_LABEL(interrupt_redirect_table)
.rept 7
.long 0
.endr
jsr @SYMBOL_NAME(interrupt_entry) /* NMI */
jmp @SYMBOL_NAME(system_call) /* TRAPA #0 (System call) */
.long 0
.long 0
jmp @SYMBOL_NAME(trace_break) /* TRAPA #3 (breakpoint) */
.rept INTERRUPTS-12
jsr @SYMBOL_NAME(interrupt_entry)
.endr
#endif
#if defined(CONFIG_RAMKERNEL)
.globl SYMBOL_NAME(interrupt_redirect_table)
.section .bss
SYMBOL_NAME_LABEL(interrupt_redirect_table)
.space 4
#endif
.section .text
.align 2
SYMBOL_NAME_LABEL(interrupt_entry)
SAVE_ALL
mov.w @(LCCR,sp),r0
btst #4,r0l
bne 1f
mov.l @SYMBOL_NAME(sw_usp),er0
mov.l @(4:16,er0),er0
bra 2f
1:
mov.l @(LVEC,sp),er0
2:
#if defined(CONFIG_ROMKERNEL)
sub.l #SYMBOL_NAME(interrupt_redirect_table),er0
#endif
#if defined(CONFIG_RAMKERNEL)
mov.l @SYMBOL_NAME(interrupt_redirect_table),er1
sub.l er1,er0
#endif
shlr.l er0
shlr.l er0
dec.l #1,er0
mov.l sp,er1
subs #4,er1 /* adjust ret_pc */
jsr @SYMBOL_NAME(do_IRQ)
mov.l @SYMBOL_NAME(irq_stat)+CPUSTAT_SOFTIRQ_PENDING,er0
beq 1f
jsr @SYMBOL_NAME(do_softirq)
1:
jmp @SYMBOL_NAME(ret_from_interrupt)
SYMBOL_NAME_LABEL(system_call)
subs #4,sp /* dummy LVEC */
SAVE_ALL
mov.w @(LCCR:16,sp),r1
bset #4,r1l
ldc r1l,ccr
mov.l er0,er4
mov.l #-ENOSYS,er0
mov.l er0,@(LER0:16,sp)
/* save top of frame */
mov.l sp,er0
jsr @SYMBOL_NAME(set_esp0)
cmp.l #NR_syscalls,er4
bcc SYMBOL_NAME(ret_from_exception):16
shll.l er4
shll.l er4
mov.l #SYMBOL_NAME(sys_call_table),er0
add.l er4,er0
mov.l @er0,er4
beq SYMBOL_NAME(ret_from_exception):16
mov.l sp,er2
and.w #0xe000,r2
mov.b @((TASK_FLAGS+3-(TIF_SYSCALL_TRACE >> 3)):16,er2),r2l
btst #(TIF_SYSCALL_TRACE & 7),r2l
bne 1f
mov.l @(LER1:16,sp),er0
mov.l @(LER2:16,sp),er1
mov.l @(LER3:16,sp),er2
jsr @er4
mov.l er0,@(LER0:16,sp) /* save the return value */
#if defined(CONFIG_SYSCALL_PRINT)
jsr @SYMBOL_NAME(syscall_print)
#endif
bra SYMBOL_NAME(ret_from_exception):8
1:
jsr SYMBOL_NAME(syscall_trace)
mov.l @(LER1:16,sp),er0
mov.l @(LER2:16,sp),er1
mov.l @(LER3:16,sp),er2
jsr @er4
mov.l er0,@(LER0:16,sp) /* save the return value */
jsr @SYMBOL_NAME(syscall_trace)
bra SYMBOL_NAME(ret_from_exception):8
SYMBOL_NAME_LABEL(ret_from_fork)
mov.l er2,er0
jsr @SYMBOL_NAME(schedule_tail)
bra SYMBOL_NAME(ret_from_exception):8
SYMBOL_NAME_LABEL(reschedule)
/* save top of frame */
mov.l sp,er0
jsr @SYMBOL_NAME(set_esp0)
jsr @SYMBOL_NAME(schedule)
SYMBOL_NAME_LABEL(ret_from_exception)
#if defined(CONFIG_PREEMPT)
orc #0x80,ccr
#endif
SYMBOL_NAME_LABEL(ret_from_interrupt)
mov.b @(LCCR+1:16,sp),r0l
btst #4,r0l /* check if returning to kernel */
bne done:8 /* if so, skip resched, signals */
andc #0x7f,ccr
mov.l sp,er4
and.w #0xe000,r4
mov.l @(TI_FLAGS:16,er4),er1
and.l #_TIF_WORK_MASK,er1
beq done:8
1:
mov.l @(TI_FLAGS:16,er4),er1
btst #TIF_NEED_RESCHED,r1l
bne SYMBOL_NAME(reschedule):16
mov.l sp,er0
subs #4,er0 /* adjust retpc */
mov.l er2,er1
jsr @SYMBOL_NAME(do_signal)
#if defined(CONFIG_PREEMPT)
bra done:8 /* userspace thoru */
3:
btst #4,r0l
beq done:8 /* userspace thoru */
4:
mov.l @(TI_PRE_COUNT:16,er4),er1
bne done:8
mov.l @(TI_FLAGS:16,er4),er1
btst #TIF_NEED_RESCHED,r1l
beq done:8
mov.b r0l,r0l
bpl done:8 /* interrupt off (exception path?) */
mov.l #PREEMPT_ACTIVE,er1
mov.l er1,@(TI_PRE_COUNT:16,er4)
andc #0x7f,ccr
jsr @SYMBOL_NAME(schedule)
sub.l er1,er1
mov.l er1,@(TI_PRE_COUNT:16,er4)
orc #0x80,ccr
bra 4b:8
#endif
done:
RESTORE_ALL /* Does RTE */
SYMBOL_NAME_LABEL(resume)
/*
* Beware - when entering resume, offset of tss is in d1,
* prev (the current task) is in a0, next (the new task)
* is in a1 and d2.b is non-zero if the mm structure is
* shared between the tasks, so don't change these
* registers until their contents are no longer needed.
*/
/* save sr */
sub.w r3,r3
stc ccr,r3l
mov.w r3,@(THREAD_CCR+2:16,er0)
/* disable interrupts */
orc #0x80,ccr
mov.l @SYMBOL_NAME(sw_usp),er3
mov.l er3,@(THREAD_USP:16,er0)
mov.l sp,@(THREAD_KSP:16,er0)
/* Skip address space switching if they are the same. */
/* FIXME: what did we hack out of here, this does nothing! */
mov.l @(THREAD_USP:16,er1),er0
mov.l er0,@SYMBOL_NAME(sw_usp)
mov.l @(THREAD_KSP:16,er1),sp
/* restore status register */
mov.w @(THREAD_CCR+2:16,er1),r3
ldc r3l,ccr
rts
SYMBOL_NAME_LABEL(trace_break)
subs #4,sp
SAVE_ALL
sub.l er1,er1
dec.l #1,er1
mov.l er1,@(LORIG,sp)
mov.l sp,er0
jsr @SYMBOL_NAME(set_esp0)
mov.l @SYMBOL_NAME(sw_usp),er0
mov.l @er0,er1
subs #2,er1
mov.l er1,@er0
and.w #0xff,e1
mov.l er1,er0
jsr @SYMBOL_NAME(trace_trap)
jmp @SYMBOL_NAME(ret_from_exception)
.section .bss
SYMBOL_NAME_LABEL(sw_ksp)
.space 4
SYMBOL_NAME_LABEL(sw_usp)
.space 4

2
arch/h8300/platform/h8s/Makefile
View File

@ -4,4 +4,4 @@
# Reuse any files we can from the H8S
#
obj-y := entry.o ints_h8s.o ptrace_h8s.o
obj-y := ints_h8s.o ptrace_h8s.o

2
include/asm-h8300/thread_info.h
View File

@ -92,6 +92,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
#define TIF_MEMDIE 5
#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
@ -99,6 +100,7 @@ static inline struct thread_info *current_thread_info(void)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */