diff options
Diffstat (limited to 'arch/m68knommu/platform/68328/entry.S')
-rw-r--r-- | arch/m68knommu/platform/68328/entry.S | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/arch/m68knommu/platform/68328/entry.S b/arch/m68knommu/platform/68328/entry.S deleted file mode 100644 index 676960cf022a..000000000000 --- a/arch/m68knommu/platform/68328/entry.S +++ /dev/null @@ -1,263 +0,0 @@ -/* - * linux/arch/m68knommu/platform/68328/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 - */ - -#include <linux/sys.h> -#include <linux/linkage.h> -#include <asm/thread_info.h> -#include <asm/unistd.h> -#include <asm/errno.h> -#include <asm/setup.h> -#include <asm/segment.h> -#include <asm/traps.h> -#include <asm/asm-offsets.h> -#include <asm/entry.h> - -.text - -.globl system_call -.globl resume -.globl ret_from_exception -.globl ret_from_signal -.globl sys_call_table -.globl ret_from_interrupt -.globl bad_interrupt -.globl inthandler1 -.globl inthandler2 -.globl inthandler3 -.globl inthandler4 -.globl inthandler5 -.globl inthandler6 -.globl inthandler7 - -badsys: - movel #-ENOSYS,%sp@(PT_OFF_D0) - jra ret_from_exception - -do_trace: - movel #-ENOSYS,%sp@(PT_OFF_D0) /* needed for strace*/ - subql #4,%sp - SAVE_SWITCH_STACK - jbsr syscall_trace_enter - RESTORE_SWITCH_STACK - addql #4,%sp - movel %sp@(PT_OFF_ORIG_D0),%d1 - movel #-ENOSYS,%d0 - cmpl #NR_syscalls,%d1 - jcc 1f - lsl #2,%d1 - lea sys_call_table, %a0 - jbsr %a0@(%d1) - -1: movel %d0,%sp@(PT_OFF_D0) /* save the return value */ - subql #4,%sp /* dummy return address */ - SAVE_SWITCH_STACK - jbsr syscall_trace_leave - -ret_from_signal: - RESTORE_SWITCH_STACK - addql #4,%sp - jra ret_from_exception - -ENTRY(system_call) - SAVE_ALL - - /* save top of frame*/ - pea %sp@ - jbsr set_esp0 - addql #4,%sp - - movel %sp@(PT_OFF_ORIG_D0),%d0 - - movel %sp,%d1 /* get thread_info pointer */ - andl #-THREAD_SIZE,%d1 - movel %d1,%a2 - btst #(TIF_SYSCALL_TRACE%8),%a2@(TI_FLAGS+(31-TIF_SYSCALL_TRACE)/8) - jne do_trace - cmpl #NR_syscalls,%d0 - jcc badsys - lsl #2,%d0 - lea sys_call_table,%a0 - movel %a0@(%d0), %a0 - jbsr %a0@ - movel %d0,%sp@(PT_OFF_D0) /* save the return value*/ - -ret_from_exception: - btst #5,%sp@(PT_OFF_SR) /* check if returning to kernel*/ - jeq Luser_return /* if so, skip resched, signals*/ - -Lkernel_return: - RESTORE_ALL - -Luser_return: - /* 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 - - movel %sp,%d1 /* get thread_info pointer */ - andl #-THREAD_SIZE,%d1 - movel %d1,%a2 -1: - move %a2@(TI_FLAGS),%d1 /* thread_info->flags */ - jne Lwork_to_do - RESTORE_ALL - -Lwork_to_do: - movel %a2@(TI_FLAGS),%d1 /* thread_info->flags */ - btst #TIF_NEED_RESCHED,%d1 - jne reschedule - -Lsignal_return: - subql #4,%sp /* dummy return address*/ - SAVE_SWITCH_STACK - pea %sp@(SWITCH_STACK_SIZE) - bsrw do_signal - addql #4,%sp - RESTORE_SWITCH_STACK - addql #4,%sp - jra 1b - -/* - * This is the main interrupt handler, responsible for calling process_int() - */ -inthandler1: - SAVE_ALL - movew %sp@(PT_OFF_FORMATVEC), %d0 - and #0x3ff, %d0 - - movel %sp,%sp@- - movel #65,%sp@- /* put vector # on stack*/ - jbsr process_int /* process the IRQ*/ -3: addql #8,%sp /* pop parameters off stack*/ - bra ret_from_interrupt - -inthandler2: - SAVE_ALL - movew %sp@(PT_OFF_FORMATVEC), %d0 - and #0x3ff, %d0 - - movel %sp,%sp@- - movel #66,%sp@- /* put vector # on stack*/ - jbsr process_int /* process the IRQ*/ -3: addql #8,%sp /* pop parameters off stack*/ - bra ret_from_interrupt - -inthandler3: - SAVE_ALL - movew %sp@(PT_OFF_FORMATVEC), %d0 - and #0x3ff, %d0 - - movel %sp,%sp@- - movel #67,%sp@- /* put vector # on stack*/ - jbsr process_int /* process the IRQ*/ -3: addql #8,%sp /* pop parameters off stack*/ - bra ret_from_interrupt - -inthandler4: - SAVE_ALL - movew %sp@(PT_OFF_FORMATVEC), %d0 - and #0x3ff, %d0 - - movel %sp,%sp@- - movel #68,%sp@- /* put vector # on stack*/ - jbsr process_int /* process the IRQ*/ -3: addql #8,%sp /* pop parameters off stack*/ - bra ret_from_interrupt - -inthandler5: - SAVE_ALL - movew %sp@(PT_OFF_FORMATVEC), %d0 - and #0x3ff, %d0 - - movel %sp,%sp@- - movel #69,%sp@- /* put vector # on stack*/ - jbsr process_int /* process the IRQ*/ -3: addql #8,%sp /* pop parameters off stack*/ - bra ret_from_interrupt - -inthandler6: - SAVE_ALL - movew %sp@(PT_OFF_FORMATVEC), %d0 - and #0x3ff, %d0 - - movel %sp,%sp@- - movel #70,%sp@- /* put vector # on stack*/ - jbsr process_int /* process the IRQ*/ -3: addql #8,%sp /* pop parameters off stack*/ - bra ret_from_interrupt - -inthandler7: - SAVE_ALL - movew %sp@(PT_OFF_FORMATVEC), %d0 - and #0x3ff, %d0 - - movel %sp,%sp@- - movel #71,%sp@- /* put vector # on stack*/ - jbsr process_int /* process the IRQ*/ -3: addql #8,%sp /* pop parameters off stack*/ - bra ret_from_interrupt - -inthandler: - SAVE_ALL - movew %sp@(PT_OFF_FORMATVEC), %d0 - and #0x3ff, %d0 - - movel %sp,%sp@- - movel %d0,%sp@- /* put vector # on stack*/ - jbsr process_int /* process the IRQ*/ -3: addql #8,%sp /* pop parameters off stack*/ - bra ret_from_interrupt - -ret_from_interrupt: - jeq 1f -2: - RESTORE_ALL -1: - moveb %sp@(PT_OFF_SR), %d0 - and #7, %d0 - jhi 2b - - /* check if we need to do software interrupts */ - jeq ret_from_exception - - pea ret_from_exception - jra do_softirq - - -/* - * Handler for uninitialized and spurious interrupts. - */ -ENTRY(bad_interrupt) - addql #1,num_spurious - rte - -/* - * 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. - */ -ENTRY(resume) - movel %a0,%d1 /* save prev thread in d1 */ - movew %sr,%a0@(TASK_THREAD+THREAD_SR) /* save sr */ - movel %usp,%a2 /* save usp */ - movel %a2,%a0@(TASK_THREAD+THREAD_USP) - - SAVE_SWITCH_STACK - movel %sp,%a0@(TASK_THREAD+THREAD_KSP) /* save kernel stack */ - movel %a1@(TASK_THREAD+THREAD_KSP),%sp /* restore new thread stack */ - RESTORE_SWITCH_STACK - - movel %a1@(TASK_THREAD+THREAD_USP),%a0 /* restore user stack */ - movel %a0,%usp - movew %a1@(TASK_THREAD+THREAD_SR),%sr /* restore thread status reg */ - rts - |