[deliverable/linux.git] / arch / m68knommu / kernel / entry.S

/*
 *  linux/arch/m68knommu/kernel/entry.S
 *
 *  Copyright (C) 1999-2002, 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) 
 *
 * 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>
 */

#include <linux/sys.h>
#include <linux/linkage.h>
#include <asm/errno.h>
#include <asm/setup.h>
#include <asm/segment.h>
#include <asm/asm-offsets.h>
#include <asm/entry.h>
#include <asm/unistd.h>

.text

.globl buserr
.globl trap
.globl ret_from_exception
.globl ret_from_signal
.globl sys_fork
.globl sys_clone
.globl sys_vfork

ENTRY(buserr)
	SAVE_ALL
	moveq	#-1,%d0
	movel	%d0,%sp@(PT_OFF_ORIG_D0)
	movel	%sp,%sp@- 		/* stack frame pointer argument */
	jsr	buserr_c
	addql	#4,%sp
	jra	ret_from_exception

ENTRY(trap)
	SAVE_ALL
	moveq	#-1,%d0
	movel	%d0,%sp@(PT_OFF_ORIG_D0)
	movel	%sp,%sp@- 		/* stack frame pointer argument */
	jsr	trap_c
	addql	#4,%sp
	jra	ret_from_exception

#ifdef TRAP_DBG_INTERRUPT

.globl dbginterrupt
ENTRY(dbginterrupt)
	SAVE_ALL
	moveq	#-1,%d0
	movel	%d0,%sp@(PT_OFF_ORIG_D0)
	movel	%sp,%sp@- 		/* stack frame pointer argument */
	jsr	dbginterrupt_c
	addql	#4,%sp
	jra	ret_from_exception
#endif

ENTRY(reschedule)
	/* save top of frame */
	pea	%sp@
	jbsr	set_esp0
	addql	#4,%sp
	pea	ret_from_exception
	jmp	schedule

ENTRY(ret_from_fork)
	movel	%d1,%sp@-
	jsr	schedule_tail
	addql	#4,%sp
	jra	ret_from_exception

ENTRY(sys_fork)
	SAVE_SWITCH_STACK
	pea	%sp@(SWITCH_STACK_SIZE)
	jbsr	m68k_fork
	addql	#4,%sp
	RESTORE_SWITCH_STACK
	rts

ENTRY(sys_vfork)
	SAVE_SWITCH_STACK
	pea	%sp@(SWITCH_STACK_SIZE)
	jbsr	m68k_vfork
	addql	#4,%sp
	RESTORE_SWITCH_STACK
	rts

ENTRY(sys_clone)
	SAVE_SWITCH_STACK
	pea	%sp@(SWITCH_STACK_SIZE)
	jbsr	m68k_clone
	addql	#4,%sp
	RESTORE_SWITCH_STACK
	rts

ENTRY(sys_sigreturn)
	SAVE_SWITCH_STACK
	jbsr	do_sigreturn
	RESTORE_SWITCH_STACK
	rts

ENTRY(sys_rt_sigreturn)
	SAVE_SWITCH_STACK
	jbsr	do_rt_sigreturn
	RESTORE_SWITCH_STACK
	rts

ENTRY(ret_from_user_signal)
	moveq #__NR_sigreturn,%d0
	trap #0

ENTRY(ret_from_user_rt_signal)
	movel #__NR_rt_sigreturn,%d0
	trap #0
Commit	Line	Data
1da177e4 LT	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
1da177e4 LT	27	#include <linux/sys.h>
1da177e4 LT	28	#include <linux/linkage.h>
1da177e4 LT	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>
2d7f16d6	34	#include <asm/unistd.h>
1da177e4 LT	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
c84b564e	49	movel %d0,%sp@(PT_OFF_ORIG_D0)
1da177e4 LT	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
c84b564e	58	movel %d0,%sp@(PT_OFF_ORIG_D0)
1da177e4 LT	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
c84b564e	70	movel %d0,%sp@(PT_OFF_ORIG_D0)
1da177e4 LT	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
1da177e4 LT	115	ENTRY(sys_sigreturn)
	116	SAVE_SWITCH_STACK
	117	jbsr do_sigreturn
	118	RESTORE_SWITCH_STACK
	119	rts
	120
	121	ENTRY(sys_rt_sigreturn)
	122	SAVE_SWITCH_STACK
	123	jbsr do_rt_sigreturn
	124	RESTORE_SWITCH_STACK
	125	rts
	126
2d7f16d6 WC	127	ENTRY(ret_from_user_signal)
	128	moveq #__NR_sigreturn,%d0
	129	trap #0
	130
	131	ENTRY(ret_from_user_rt_signal)
760d6e78	132	movel #__NR_rt_sigreturn,%d0
2d7f16d6 WC	133	trap #0
2d7f16d6 WC	134