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Merge up to 2.6.26
Merge of 2.6.x-xfs-melb:linux:31804b by kenmcd.

/*
 *  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/thread_info.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_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_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_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_sigsuspend)
	SAVE_SWITCH_STACK
	pea	%sp@(SWITCH_STACK_SIZE)
	jbsr	do_sigsuspend
	addql	#4,%sp
	RESTORE_SWITCH_STACK
	rts

ENTRY(sys_rt_sigsuspend)
	SAVE_SWITCH_STACK
	pea	%sp@(SWITCH_STACK_SIZE)
	jbsr	do_rt_sigsuspend
	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)
	move #__NR_rt_sigreturn,%d0
	trap #0