From 2fea299f74c846157b068be8ae15b406db0719d9 Mon Sep 17 00:00:00 2001 From: Yoshinori Sato Date: Sun, 15 Jul 2007 23:38:36 -0700 Subject: h8300 entry.S update Signed-off-by: Yoshinori Sato Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/h8300/kernel/Makefile | 3 +- arch/h8300/kernel/entry.S | 393 ++++++++++++++++++++++++++++++++++++ arch/h8300/kernel/ptrace.c | 2 +- arch/h8300/kernel/signal.c | 6 + arch/h8300/platform/h8300h/Makefile | 2 +- arch/h8300/platform/h8300h/entry.S | 332 ------------------------------ arch/h8300/platform/h8s/Makefile | 2 +- arch/h8300/platform/h8s/entry.S | 331 ------------------------------ 8 files changed, 404 insertions(+), 667 deletions(-) create mode 100644 arch/h8300/kernel/entry.S delete mode 100644 arch/h8300/platform/h8300h/entry.S delete mode 100644 arch/h8300/platform/h8s/entry.S (limited to 'arch') diff --git a/arch/h8300/kernel/Makefile b/arch/h8300/kernel/Makefile index ccc1a7fbf94b..874f6aefee65 100644 --- a/arch/h8300/kernel/Makefile +++ b/arch/h8300/kernel/Makefile @@ -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 diff --git a/arch/h8300/kernel/entry.S b/arch/h8300/kernel/entry.S new file mode 100644 index 000000000000..ca7431690300 --- /dev/null +++ b/arch/h8300/kernel/entry.S @@ -0,0 +1,393 @@ +/* -*- mode: asm -*- + * + * linux/arch/h8300/platform/h8300h/entry.S + * + * Yoshinori Sato + * David McCullough + * + */ + +/* + * entry.S + * include exception/interrupt gateway + * system call entry + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#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 + + /* user mode */ + mov.l sp,@SYMBOL_NAME(sw_usp) + 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 */ + 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.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 */ + 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) /* set ccr */ + mov.l er6,@-sp /* syscall arg #6 */ + mov.l er5,@-sp /* syscall arg #5 */ + mov.l er4,@-sp /* syscall arg #4 */ + .endm /* r1 = ccr */ + + .macro RESTORE_ALL + mov.l @sp+,er4 + mov.l @sp+,er5 + mov.l @sp+,er6 + RESTOREREGS + 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 + 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,@(USERRET:16,er0) + + mov.l @sp+,er1 + 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 + 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_entry) +.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 + .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.l sp,er0 + add.l #LVEC,er0 + btst #4,r1l + bne 1f + /* user LVEC */ + mov.l @SYMBOL_NAME(sw_usp),er0 + adds #4,er0 +1: + mov.l @er0,er0 /* LVEC address */ +#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 + SHLR2 er0 + dec.l #1,er0 + mov.l sp,er1 + subs #4,er1 /* adjust ret_pc */ + 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 + + /* save top of frame */ + mov.l sp,er0 + jsr @SYMBOL_NAME(set_esp0) + 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 1f + jsr @SYMBOL_NAME(do_syscall_trace) +1: + 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 */ + 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 + +badsys: + mov.l #-ENOSYS,er0 + mov.l er0,@(LER0:16,sp) + bra resume_userspace + +#if !defined(CONFIG_PREEMPT) +#define resume_kernel restore_all +#endif + +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 + bne resume_kernel:8 /* return from kernel */ +resume_userspace: + andc #0x7f,ccr + mov.l sp,er4 + and.w #0xe000,r4 /* er4 <- current thread info */ + mov.l @(TI_FLAGS:16,er4),er1 + and.l #_TIF_WORK_MASK,er1 + beq restore_all:8 +work_pending: + btst #TIF_NEED_RESCHED,r1l + bne work_resched:8 + /* work notifysig */ + mov.l sp,er0 + 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) + 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) + /* + * 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 + mov.w @(-2:16,er1),r2 + cmp.w #0x5730,r2 + beq 1f + subs #2,er1 + mov.l er1,@er0 +1: + 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 + + .end diff --git a/arch/h8300/kernel/ptrace.c b/arch/h8300/kernel/ptrace.c index 8f2411db7eaf..8a7a991b8f76 100644 --- a/arch/h8300/kernel/ptrace.c +++ b/arch/h8300/kernel/ptrace.c @@ -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; diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c index 02955604d760..62ea12d339b9 100644 --- a/arch/h8300/kernel/signal.c +++ b/arch/h8300/kernel/signal.c @@ -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); +} diff --git a/arch/h8300/platform/h8300h/Makefile b/arch/h8300/platform/h8300h/Makefile index b24ea08aa0a7..c5096369ea50 100644 --- a/arch/h8300/platform/h8300h/Makefile +++ b/arch/h8300/platform/h8300h/Makefile @@ -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 diff --git a/arch/h8300/platform/h8300h/entry.S b/arch/h8300/platform/h8300h/entry.S deleted file mode 100644 index f86ac3b5d4de..000000000000 --- a/arch/h8300/platform/h8300h/entry.S +++ /dev/null @@ -1,332 +0,0 @@ -/* -*- mode: asm -*- - * - * linux/arch/h8300/platform/h8300h/entry.S - * - * Yoshinori Sato - * David McCullough - * - */ - -/* - * entry.S - * include exception/interrupt gateway - * system call entry - */ - -#include -#include -#include -#include -#include -#include -#include -#include - - .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 diff --git a/arch/h8300/platform/h8s/Makefile b/arch/h8300/platform/h8s/Makefile index 0847b15d4256..bf1241883766 100644 --- a/arch/h8300/platform/h8s/Makefile +++ b/arch/h8300/platform/h8s/Makefile @@ -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 diff --git a/arch/h8300/platform/h8s/entry.S b/arch/h8300/platform/h8s/entry.S deleted file mode 100644 index f3d6b8e8f959..000000000000 --- a/arch/h8300/platform/h8s/entry.S +++ /dev/null @@ -1,331 +0,0 @@ -/* -*- mode: asm -*- - * - * linux/arch/h8300/platform/h8s/entry.S - * - * Yoshinori Sato - * - * fairly heavy changes to fix syscall args and signal processing - * by David McCullough - */ - -/* - * entry.S - * include exception/interrupt gateway - * system call entry - */ - -#include -#include -#include -#include -#include -#include -#include -#include - - .h8300s - -/* CPU context save/restore macros. */ - - .macro SAVE_ALL - mov.l er0,@-sp - - stc ccr,r0l /* check kernel mode */ - btst #4,r0l - bne 5f - - /* user mode */ - mov.l sp,@SYMBOL_NAME(sw_usp) - 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 */ - - 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 */ - bra 6f -5: - /* kernel mode */ - mov.l @sp,er0 /* restore saved er0 */ - subs #2,sp /* set dummy ccr */ - stm.l er0-er3,@-sp - mov.w @(LRET-LER3:16,sp),r1 /* copy old ccr */ - mov.b r1h,r1l - mov.b #0,r1h - mov.w r1,@(LCCR-LER3:16,sp) -6: - 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 - ldm.l @sp+,er2-er3 - 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 @(LEXR-LER1:16,sp),r1 /* restore EXR */ - mov.b r1l,r1h - mov.w r1,@(8:16,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,@(10:16,er0) - - mov.l @sp+,er1 - 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 - 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(trace_break) -.globl SYMBOL_NAME(interrupt_entry) - -INTERRUPTS = 128 -#if defined(CONFIG_ROMKERNEL) - .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:16,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 #2,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) - -SYMBOL_NAME_LABEL(system_call) - subs #4,sp /* dummy LVEC */ - SAVE_ALL - 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 - 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 -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) - /* - * er0 = prev - * er1 = next - * return last in er2 - */ - - /* save sr */ - sub.w r3,r3 - stc ccr,r3l - stc exr,r3h - 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 - ldc r3h,exr - - rts - -SYMBOL_NAME_LABEL(trace_break) - subs #4,sp /* dummy LVEC */ - 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 -- cgit v1.2.3