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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> |
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 | ||
115 | ENTRY(sys_sigsuspend) | |
116 | SAVE_SWITCH_STACK | |
117 | pea %sp@(SWITCH_STACK_SIZE) | |
118 | jbsr do_sigsuspend | |
119 | addql #4,%sp | |
120 | RESTORE_SWITCH_STACK | |
121 | rts | |
122 | ||
123 | ENTRY(sys_rt_sigsuspend) | |
124 | SAVE_SWITCH_STACK | |
125 | pea %sp@(SWITCH_STACK_SIZE) | |
126 | jbsr do_rt_sigsuspend | |
127 | addql #4,%sp | |
128 | RESTORE_SWITCH_STACK | |
129 | rts | |
130 | ||
131 | ENTRY(sys_sigreturn) | |
132 | SAVE_SWITCH_STACK | |
133 | jbsr do_sigreturn | |
134 | RESTORE_SWITCH_STACK | |
135 | rts | |
136 | ||
137 | ENTRY(sys_rt_sigreturn) | |
138 | SAVE_SWITCH_STACK | |
139 | jbsr do_rt_sigreturn | |
140 | RESTORE_SWITCH_STACK | |
141 | rts | |
142 | ||
2d7f16d6 WC |
143 | ENTRY(ret_from_user_signal) |
144 | moveq #__NR_sigreturn,%d0 | |
145 | trap #0 | |
146 | ||
147 | ENTRY(ret_from_user_rt_signal) | |
760d6e78 | 148 | movel #__NR_rt_sigreturn,%d0 |
2d7f16d6 WC |
149 | trap #0 |
150 |