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/arch/m68knommu/kernel/entry.S

https://bitbucket.org/evzijst/gittest
Assembly | 143 lines | 126 code | 17 blank | 0 comment | 1 complexity | d0bc404c1c19c59b287a7e75437795c1 MD5 | raw file
  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/config.h>
 28#include <linux/sys.h>
 29#include <linux/linkage.h>
 30#include <asm/thread_info.h>
 31#include <asm/errno.h>
 32#include <asm/setup.h>
 33#include <asm/segment.h>
 34#include <asm/asm-offsets.h>
 35#include <asm/entry.h>
 36
 37.text
 38
 39.globl buserr
 40.globl trap
 41.globl ret_from_exception
 42.globl ret_from_signal
 43.globl sys_fork
 44.globl sys_clone
 45.globl sys_vfork
 46
 47ENTRY(buserr)
 48	SAVE_ALL
 49	moveq	#-1,%d0
 50	movel	%d0,%sp@(PT_ORIG_D0)
 51	movel	%sp,%sp@- 		/* stack frame pointer argument */
 52	jsr	buserr_c
 53	addql	#4,%sp
 54	jra	ret_from_exception
 55
 56ENTRY(trap)
 57	SAVE_ALL
 58	moveq	#-1,%d0
 59	movel	%d0,%sp@(PT_ORIG_D0)
 60	movel	%sp,%sp@- 		/* stack frame pointer argument */
 61	jsr	trap_c
 62	addql	#4,%sp
 63	jra	ret_from_exception
 64
 65#ifdef TRAP_DBG_INTERRUPT
 66
 67.globl dbginterrupt
 68ENTRY(dbginterrupt)
 69	SAVE_ALL
 70	moveq	#-1,%d0
 71	movel	%d0,%sp@(PT_ORIG_D0)
 72	movel	%sp,%sp@- 		/* stack frame pointer argument */
 73	jsr	dbginterrupt_c
 74	addql	#4,%sp
 75	jra	ret_from_exception
 76#endif
 77
 78ENTRY(reschedule)
 79	/* save top of frame */
 80	pea	%sp@
 81	jbsr	set_esp0
 82	addql	#4,%sp
 83	pea	ret_from_exception
 84	jmp	schedule
 85
 86ENTRY(ret_from_fork)
 87	movel	%d1,%sp@-
 88	jsr	schedule_tail
 89	addql	#4,%sp
 90	jra	ret_from_exception
 91
 92ENTRY(sys_fork)
 93	SAVE_SWITCH_STACK
 94	pea	%sp@(SWITCH_STACK_SIZE)
 95	jbsr	m68k_fork
 96	addql	#4,%sp
 97	RESTORE_SWITCH_STACK
 98	rts
 99
100ENTRY(sys_vfork)
101	SAVE_SWITCH_STACK
102	pea	%sp@(SWITCH_STACK_SIZE)
103	jbsr	m68k_vfork
104	addql	#4,%sp
105	RESTORE_SWITCH_STACK
106	rts
107
108ENTRY(sys_clone)
109	SAVE_SWITCH_STACK
110	pea	%sp@(SWITCH_STACK_SIZE)
111	jbsr	m68k_clone
112	addql	#4,%sp
113	RESTORE_SWITCH_STACK
114	rts
115
116ENTRY(sys_sigsuspend)
117	SAVE_SWITCH_STACK
118	pea	%sp@(SWITCH_STACK_SIZE)
119	jbsr	do_sigsuspend
120	addql	#4,%sp
121	RESTORE_SWITCH_STACK
122	rts
123
124ENTRY(sys_rt_sigsuspend)
125	SAVE_SWITCH_STACK
126	pea	%sp@(SWITCH_STACK_SIZE)
127	jbsr	do_rt_sigsuspend
128	addql	#4,%sp
129	RESTORE_SWITCH_STACK
130	rts
131
132ENTRY(sys_sigreturn)
133	SAVE_SWITCH_STACK
134	jbsr	do_sigreturn
135	RESTORE_SWITCH_STACK
136	rts
137
138ENTRY(sys_rt_sigreturn)
139	SAVE_SWITCH_STACK
140	jbsr	do_rt_sigreturn
141	RESTORE_SWITCH_STACK
142	rts
143