arch/m68knommu/kernel/entry.S

   1 /*
   2  *  linux/arch/m68knommu/kernel/entry.S
   3  *
   4  *  Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
   5  *  Copyright (C) 1998  D. Jeff Dionne <jeff@lineo.ca>,
   6  *                      Kenneth Albanowski <kjahds@kjahds.com>,
   7  *  Copyright (C) 2000  Lineo Inc. (www.lineo.com)
   8  *
   9  * Based on:
  10  *
  11  *  linux/arch/m68k/kernel/entry.S
  12  *
  13  *  Copyright (C) 1991, 1992  Linus Torvalds
  14  *
  15  * This file is subject to the terms and conditions of the GNU General Public
  16  * License.  See the file README.legal in the main directory of this archive
  17  * for more details.
  18  *
  19  * Linux/m68k support by Hamish Macdonald
  20  *
  21  * 68060 fixes by Jesper Skov
  22  * ColdFire support by Greg Ungerer (gerg@snapgear.com)
  23  * 5307 fixes by David W. Miller
  24  * linux 2.4 support David McCullough <davidm@snapgear.com>
  25  */
  26
  27 #include <linux/sys.h>
  28 #include <linux/linkage.h>
  29 #include <asm/errno.h>
  30 #include <asm/setup.h>
  31 #include <asm/segment.h>
  32 #include <asm/asm-offsets.h>
  33 #include <asm/entry.h>
  34 #include <asm/unistd.h>
  35
  36 .text
  37
  38 .globl buserr
  39 .globl trap
  40 .globl ret_from_exception
  41 .globl ret_from_signal
  42 .globl sys_fork
  43 .globl sys_clone
  44 .globl sys_vfork
  45
  46 ENTRY(buserr)
  47         SAVE_ALL
  48         moveq   #-1,%d0
  49         movel   %d0,%sp@(PT_OFF_ORIG_D0)
  50         movel   %sp,%sp@-               /* stack frame pointer argument */
  51         jsr     buserr_c
  52         addql   #4,%sp
  53         jra     ret_from_exception
  54
  55 ENTRY(trap)
  56         SAVE_ALL
  57         moveq   #-1,%d0
  58         movel   %d0,%sp@(PT_OFF_ORIG_D0)
  59         movel   %sp,%sp@-               /* stack frame pointer argument */
  60         jsr     trap_c
  61         addql   #4,%sp
  62         jra     ret_from_exception
  63
  64 #ifdef TRAP_DBG_INTERRUPT
  65
  66 .globl dbginterrupt
  67 ENTRY(dbginterrupt)
  68         SAVE_ALL
  69         moveq   #-1,%d0
  70         movel   %d0,%sp@(PT_OFF_ORIG_D0)
  71         movel   %sp,%sp@-               /* stack frame pointer argument */
  72         jsr     dbginterrupt_c
  73         addql   #4,%sp
  74         jra     ret_from_exception
  75 #endif
  76
  77 ENTRY(reschedule)
  78         /* save top of frame */
  79         pea     %sp@
  80         jbsr    set_esp0
  81         addql   #4,%sp
  82         pea     ret_from_exception
  83         jmp     schedule
  84
  85 ENTRY(ret_from_fork)
  86         movel   %d1,%sp@-
  87         jsr     schedule_tail
  88         addql   #4,%sp
  89         jra     ret_from_exception
  90
  91 ENTRY(sys_fork)
  92         SAVE_SWITCH_STACK
  93         pea     %sp@(SWITCH_STACK_SIZE)
  94         jbsr    m68k_fork
  95         addql   #4,%sp
  96         RESTORE_SWITCH_STACK
  97         rts
  98
  99 ENTRY(sys_vfork)
 100         SAVE_SWITCH_STACK
 101         pea     %sp@(SWITCH_STACK_SIZE)
 102         jbsr    m68k_vfork
 103         addql   #4,%sp
 104         RESTORE_SWITCH_STACK
 105         rts
 106
 107 ENTRY(sys_clone)
 108         SAVE_SWITCH_STACK
 109         pea     %sp@(SWITCH_STACK_SIZE)
 110         jbsr    m68k_clone
 111         addql   #4,%sp
 112         RESTORE_SWITCH_STACK
 113         rts
 114
 115 ENTRY(sys_sigsuspend)
 116         SAVE_SWITCH_STACK
 117         pea     %sp@(SWITCH_STACK_SIZE)
 118         jbsr    do_sigsuspend
 119         addql   #4,%sp
 120         RESTORE_SWITCH_STACK
 121         rts
 122
 123 ENTRY(sys_rt_sigsuspend)
 124         SAVE_SWITCH_STACK
 125         pea     %sp@(SWITCH_STACK_SIZE)
 126         jbsr    do_rt_sigsuspend
 127         addql   #4,%sp
 128         RESTORE_SWITCH_STACK
 129         rts
 130
 131 ENTRY(sys_sigreturn)
 132         SAVE_SWITCH_STACK
 133         jbsr    do_sigreturn
 134         RESTORE_SWITCH_STACK
 135         rts
 136
 137 ENTRY(sys_rt_sigreturn)
 138         SAVE_SWITCH_STACK
 139         jbsr    do_rt_sigreturn
 140         RESTORE_SWITCH_STACK
 141         rts
 142
 143 ENTRY(ret_from_user_signal)
 144         moveq #__NR_sigreturn,%d0
 145         trap #0
 146
 147 ENTRY(ret_from_user_rt_signal)
 148         move #__NR_rt_sigreturn,%d0
 149         trap #0
 150