arch/m68k/kernel/entry_no.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/linkage.h>
  28 #include <asm/errno.h>
  29 #include <asm/setup.h>
  30 #include <asm/segment.h>
  31 #include <asm/asm-offsets.h>
  32 #include <asm/entry.h>
  33 #include <asm/unistd.h>
  34
  35 .text
  36
  37 .globl buserr
  38 .globl trap
  39 .globl ret_from_exception
  40 .globl ret_from_signal
  41 .globl sys_fork
  42 .globl sys_clone
  43 .globl sys_vfork
  44
  45 ENTRY(buserr)
  46         SAVE_ALL
  47         moveq   #-1,%d0
  48         movel   %d0,%sp@(PT_OFF_ORIG_D0)
  49         movel   %sp,%sp@-               /* stack frame pointer argument */
  50         jsr     buserr_c
  51         addql   #4,%sp
  52         jra     ret_from_exception
  53
  54 ENTRY(trap)
  55         SAVE_ALL
  56         moveq   #-1,%d0
  57         movel   %d0,%sp@(PT_OFF_ORIG_D0)
  58         movel   %sp,%sp@-               /* stack frame pointer argument */
  59         jsr     trap_c
  60         addql   #4,%sp
  61         jra     ret_from_exception
  62
  63 #ifdef TRAP_DBG_INTERRUPT
  64
  65 .globl dbginterrupt
  66 ENTRY(dbginterrupt)
  67         SAVE_ALL
  68         moveq   #-1,%d0
  69         movel   %d0,%sp@(PT_OFF_ORIG_D0)
  70         movel   %sp,%sp@-               /* stack frame pointer argument */
  71         jsr     dbginterrupt_c
  72         addql   #4,%sp
  73         jra     ret_from_exception
  74 #endif
  75
  76 ENTRY(reschedule)
  77         /* save top of frame */
  78         pea     %sp@
  79         jbsr    set_esp0
  80         addql   #4,%sp
  81         pea     ret_from_exception
  82         jmp     schedule
  83
  84 ENTRY(ret_from_fork)
  85         movel   %d1,%sp@-
  86         jsr     schedule_tail
  87         addql   #4,%sp
  88         jra     ret_from_exception
  89
  90 ENTRY(sys_fork)
  91         SAVE_SWITCH_STACK
  92         pea     %sp@(SWITCH_STACK_SIZE)
  93         jbsr    m68k_fork
  94         addql   #4,%sp
  95         RESTORE_SWITCH_STACK
  96         rts
  97
  98 ENTRY(sys_vfork)
  99         SAVE_SWITCH_STACK
 100         pea     %sp@(SWITCH_STACK_SIZE)
 101         jbsr    m68k_vfork
 102         addql   #4,%sp
 103         RESTORE_SWITCH_STACK
 104         rts
 105
 106 ENTRY(sys_clone)
 107         SAVE_SWITCH_STACK
 108         pea     %sp@(SWITCH_STACK_SIZE)
 109         jbsr    m68k_clone
 110         addql   #4,%sp
 111         RESTORE_SWITCH_STACK
 112         rts
 113
 114 ENTRY(sys_sigreturn)
 115         SAVE_SWITCH_STACK
 116         jbsr    do_sigreturn
 117         RESTORE_SWITCH_STACK
 118         rts
 119
 120 ENTRY(sys_rt_sigreturn)
 121         SAVE_SWITCH_STACK
 122         jbsr    do_rt_sigreturn
 123         RESTORE_SWITCH_STACK
 124         rts
 125
 126 ENTRY(ret_from_user_signal)
 127         moveq #__NR_sigreturn,%d0
 128         trap #0
 129
 130 ENTRY(ret_from_user_rt_signal)
 131         movel #__NR_rt_sigreturn,%d0
 132         trap #0
 133