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Diffstat (limited to 'arch/m68k/platform/coldfire/entry.S')
| -rw-r--r-- | arch/m68k/platform/coldfire/entry.S | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/arch/m68k/platform/coldfire/entry.S b/arch/m68k/platform/coldfire/entry.S deleted file mode 100644 index 881ab8e379d4..000000000000 --- a/arch/m68k/platform/coldfire/entry.S +++ /dev/null @@ -1,203 +0,0 @@ -/* - * linux/arch/m68knommu/platform/5307/entry.S - * - * Copyright (C) 1999-2007, 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) - * Copyright (C) 2004-2006 Macq Electronique SA. (www.macqel.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> - * Bug, speed and maintainability fixes by Philippe De Muyter <phdm@macqel.be> - */ - -#include <linux/linkage.h> -#include <asm/unistd.h> -#include <asm/thread_info.h> -#include <asm/errno.h> -#include <asm/setup.h> -#include <asm/segment.h> -#include <asm/asm-offsets.h> -#include <asm/entry.h> - -#ifdef CONFIG_COLDFIRE_SW_A7 -/* - * Define software copies of the supervisor and user stack pointers. - */ -.bss -sw_ksp: -.long 0 -sw_usp: -.long 0 -#endif /* CONFIG_COLDFIRE_SW_A7 */ - -.text - -.globl system_call -.globl resume -.globl ret_from_exception -.globl ret_from_signal -.globl sys_call_table -.globl inthandler - -enosys: - mov.l #sys_ni_syscall,%d3 - bra 1f - -ENTRY(system_call) - SAVE_ALL_SYS - move #0x2000,%sr /* enable intrs again */ - GET_CURRENT(%d2) - - cmpl #NR_syscalls,%d0 - jcc enosys - lea sys_call_table,%a0 - lsll #2,%d0 /* movel %a0@(%d0:l:4),%d3 */ - movel %a0@(%d0),%d3 - jeq enosys - -1: - movel %sp,%d2 /* get thread_info pointer */ - andl #-THREAD_SIZE,%d2 /* at start of kernel stack */ - movel %d2,%a0 - movel %a0@,%a1 /* save top of frame */ - movel %sp,%a1@(TASK_THREAD+THREAD_ESP0) - btst #(TIF_SYSCALL_TRACE%8),%a0@(TINFO_FLAGS+(31-TIF_SYSCALL_TRACE)/8) - bnes 1f - - movel %d3,%a0 - jbsr %a0@ - movel %d0,%sp@(PT_OFF_D0) /* save the return value */ - jra ret_from_exception -1: - movel #-ENOSYS,%d2 /* strace needs -ENOSYS in PT_OFF_D0 */ - movel %d2,PT_OFF_D0(%sp) /* on syscall entry */ - subql #4,%sp - SAVE_SWITCH_STACK - jbsr syscall_trace_enter - RESTORE_SWITCH_STACK - addql #4,%sp - movel %d3,%a0 - jbsr %a0@ - 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 - -ret_from_exception: - move #0x2700,%sr /* disable intrs */ - btst #5,%sp@(PT_OFF_SR) /* check if returning to kernel */ - jeq Luser_return /* if so, skip resched, signals */ - -#ifdef CONFIG_PREEMPT - movel %sp,%d1 /* get thread_info pointer */ - andl #-THREAD_SIZE,%d1 /* at base of kernel stack */ - movel %d1,%a0 - movel %a0@(TINFO_FLAGS),%d1 /* get thread_info->flags */ - andl #(1<<TIF_NEED_RESCHED),%d1 - jeq Lkernel_return - - movel %a0@(TINFO_PREEMPT),%d1 - cmpl #0,%d1 - jne Lkernel_return - - pea Lkernel_return - jmp preempt_schedule_irq /* preempt the kernel */ -#endif - -Lkernel_return: - moveml %sp@,%d1-%d5/%a0-%a2 - lea %sp@(32),%sp /* space for 8 regs */ - movel %sp@+,%d0 - addql #4,%sp /* orig d0 */ - addl %sp@+,%sp /* stk adj */ - rte - -Luser_return: - movel %sp,%d1 /* get thread_info pointer */ - andl #-THREAD_SIZE,%d1 /* at base of kernel stack */ - movel %d1,%a0 - moveb %a0@(TINFO_FLAGS+3),%d1 /* thread_info->flags (low 8 bits) */ - jne Lwork_to_do /* still work to do */ - -Lreturn: - RESTORE_USER - -Lwork_to_do: - movel %a0@(TINFO_FLAGS),%d1 /* get thread_info->flags */ - move #0x2000,%sr /* enable intrs again */ - btst #TIF_NEED_RESCHED,%d1 - jne reschedule - -Lsignal_return: - subql #4,%sp /* dummy return address */ - SAVE_SWITCH_STACK - pea %sp@(SWITCH_STACK_SIZE) - jsr do_notify_resume - addql #4,%sp - RESTORE_SWITCH_STACK - addql #4,%sp - jmp Luser_return - -/* - * This is the generic interrupt handler (for all hardware interrupt - * sources). Calls up to high level code to do all the work. - */ -ENTRY(inthandler) - SAVE_ALL_INT - GET_CURRENT(%d2) - - movew %sp@(PT_OFF_FORMATVEC),%d0 /* put exception # in d0 */ - andl #0x03fc,%d0 /* mask out vector only */ - - movel %sp,%sp@- /* push regs arg */ - lsrl #2,%d0 /* calculate real vector # */ - movel %d0,%sp@- /* push vector number */ - jbsr do_IRQ /* call high level irq handler */ - lea %sp@(8),%sp /* pop args off stack */ - - bra ret_from_exception - -/* - * 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) - movew %sr,%d1 /* save current status */ - movew %d1,%a0@(TASK_THREAD+THREAD_SR) - movel %a0,%d1 /* get prev thread in d1 */ - SAVE_SWITCH_STACK - movel %sp,%a0@(TASK_THREAD+THREAD_KSP) /* save kernel stack pointer */ - RDUSP /* movel %usp,%a3 */ - movel %a3,%a0@(TASK_THREAD+THREAD_USP) /* save thread user stack */ -#ifdef CONFIG_MMU - movel %a1,%a2 /* set new current */ -#endif - movel %a1@(TASK_THREAD+THREAD_USP),%a3 /* restore thread user stack */ - WRUSP /* movel %a3,%usp */ - movel %a1@(TASK_THREAD+THREAD_KSP),%sp /* restore new kernel stack */ - movew %a1@(TASK_THREAD+THREAD_SR),%d7 /* restore new status */ - movew %d7,%sr - RESTORE_SWITCH_STACK - rts - |