diff options
Diffstat (limited to 'arch/h8300/kernel/entry.S')
-rw-r--r-- | arch/h8300/kernel/entry.S | 402 |
1 files changed, 0 insertions, 402 deletions
diff --git a/arch/h8300/kernel/entry.S b/arch/h8300/kernel/entry.S deleted file mode 100644 index 94bd30f11df6..000000000000 --- a/arch/h8300/kernel/entry.S +++ /dev/null @@ -1,402 +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> - -#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,@_sw_usp - mov.l @sp,er0 /* restore saved er0 */ - orc #0x10,ccr /* switch kernel stack */ - mov.l @_sw_ksp,sp - sub.l #(LRET-LORIG),sp /* allocate LORIG - LRET */ - SAVEREGS - mov.l @_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 @_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,@_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 _system_call -.globl _ret_from_exception -.globl _ret_from_fork -.globl _ret_from_kernel_thread -.globl _ret_from_interrupt -.globl _interrupt_redirect_table -.globl _sw_ksp,_sw_usp -.globl _resume -.globl _interrupt_entry -.globl _trace_break - -#if defined(CONFIG_ROMKERNEL) - .section .int_redirect,"ax" -_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 @_trace_break - .long 0 -#endif - - jsr @_interrupt_entry /* NMI */ - jmp @_system_call /* TRAPA #0 (System call) */ - .long 0 - .long 0 - jmp @_trace_break /* TRAPA #3 (breakpoint) */ - .rept INTERRUPTS-12 - jsr @_interrupt_entry - .endr -#endif -#if defined(CONFIG_RAMKERNEL) -.globl _interrupt_redirect_table - .section .bss -_interrupt_redirect_table: - .space 4 -#endif - - .section .text - .align 2 -_interrupt_entry: - SAVE_ALL - mov.l sp,er0 - add.l #LVEC,er0 - btst #4,r1l - bne 1f - /* user LVEC */ - mov.l @_sw_usp,er0 - adds #4,er0 -1: - mov.l @er0,er0 /* LVEC address */ -#if defined(CONFIG_ROMKERNEL) - sub.l #_interrupt_redirect_table,er0 -#endif -#if defined(CONFIG_RAMKERNEL) - mov.l @_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 @_do_IRQ - jmp @_ret_from_interrupt - -_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 @_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 @_do_syscall_trace -1: - cmp.l #NR_syscalls,er4 - bcc badsys - SHLL2 er4 - mov.l #_sys_call_table,er0 - add.l er4,er0 - mov.l @er0,er4 - beq _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 @_do_syscall_trace -2: -#if defined(CONFIG_SYSCALL_PRINT) - jsr @_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 - -_ret_from_exception: -#if defined(CONFIG_PREEMPT) - orc #0x80,ccr -#endif -_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 @_do_notify_resume - bra restore_all:8 -work_resched: - mov.l sp,er0 - jsr @_set_esp0 - jsr @_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 @_set_esp0 - jsr @_schedule - orc #0x80,ccr - bra need_resched:8 -#endif - -_ret_from_fork: - mov.l er2,er0 - jsr @_schedule_tail - jmp @_ret_from_exception - -_ret_from_kernel_thread: - mov.l er2,er0 - jsr @_schedule_tail - mov.l @(LER4:16,sp),er0 - mov.l @(LER5:16,sp),er1 - jsr @er1 - jmp @_ret_from_exception - -_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 @_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,@_sw_usp - mov.l @(THREAD_KSP:16,er1),sp - - /* restore status register */ - mov.w @(THREAD_CCR+2:16,er1),r3 - - ldc r3l,ccr - rts - -_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 @_set_esp0 - mov.l @_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 @_trace_trap - jmp @_ret_from_exception - - .section .bss -_sw_ksp: - .space 4 -_sw_usp: - .space 4 - - .end |