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
 45ENTRY(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
 54ENTRY(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
 66ENTRY(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
 76ENTRY(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
 84ENTRY(ret_from_fork)
 85	movel	%d1,%sp@-
 86	jsr	schedule_tail
 87	addql	#4,%sp
 88	jra	ret_from_exception
 89
 90ENTRY(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
 98ENTRY(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
106ENTRY(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
114ENTRY(sys_sigreturn)
115	SAVE_SWITCH_STACK
116	jbsr	do_sigreturn
117	RESTORE_SWITCH_STACK
118	rts
119
120ENTRY(sys_rt_sigreturn)
121	SAVE_SWITCH_STACK
122	jbsr	do_rt_sigreturn
123	RESTORE_SWITCH_STACK
124	rts
125
126ENTRY(ret_from_user_signal)
127	moveq #__NR_sigreturn,%d0
128	trap #0
129
130ENTRY(ret_from_user_rt_signal)
131	movel #__NR_rt_sigreturn,%d0
132	trap #0
133