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git01.mediatek.com / filogic / uboot / 9b4faf25cf4976cc4951c2c08ca803fbbbb62539 / . / arch / blackfin / include / asm / entry.h
blob: 404144f4f8afbb30b7f12d4f5d668667ea339612 [file] [log] [blame]
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]1/*
Mike Frysinger66c4cf42008-02-04 19:26:55 -0500[diff] [blame]2 * entry.h - routines for context saving and restoring (for interrupts/exceptions)
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]3 *
Aubrey Li314d22f2007-04-05 18:31:18 +0800[diff] [blame]4 * Copyright (c) 2005-2007 Analog Devices Inc.
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]5 *
6 * See file CREDITS for list of people who contributed to this
7 * project.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
Aubrey Li314d22f2007-04-05 18:31:18 +0800[diff] [blame]21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
22 * MA 02110-1301 USA
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]23 */
24
25#ifndef __BLACKFIN_ENTRY_H
26#define __BLACKFIN_ENTRY_H
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]27#ifdef __ASSEMBLY__
28
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]29#define SAVE_ALL_INT save_context_no_interrupts
30#define SAVE_ALL_SYS save_context_no_interrupts
31#define SAVE_CONTEXT save_context_with_interrupts
32
33#define RESTORE_ALL restore_context_no_interrupts
34#define RESTORE_ALL_SYS restore_context_no_interrupts
35#define RESTORE_CONTEXT restore_context_with_interrupts
36
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]37/*
38 * Code to save processor context.
39 * We even save the register which are preserved by a function call
40 * - r4, r5, r6, r7, p3, p4, p5
41 */
42.macro save_context_with_interrupts
43 [--sp] = R0;
44 [--sp] = ( R7:0, P5:0 );
45 [--sp] = fp;
46 [--sp] = usp;
47
48 [--sp] = i0;
49 [--sp] = i1;
50 [--sp] = i2;
51 [--sp] = i3;
52
53 [--sp] = m0;
54 [--sp] = m1;
55 [--sp] = m2;
56 [--sp] = m3;
57
58 [--sp] = l0;
59 [--sp] = l1;
60 [--sp] = l2;
61 [--sp] = l3;
62
63 [--sp] = b0;
64 [--sp] = b1;
65 [--sp] = b2;
66 [--sp] = b3;
67 [--sp] = a0.x;
68 [--sp] = a0.w;
69 [--sp] = a1.x;
70 [--sp] = a1.w;
71
72 [--sp] = LC0;
73 [--sp] = LC1;
74 [--sp] = LT0;
75 [--sp] = LT1;
76 [--sp] = LB0;
77 [--sp] = LB1;
78
79 [--sp] = ASTAT;
80
81 [--sp] = r0; /* Skip reserved */
82 [--sp] = RETS;
83 [--sp] = RETI;
84 [--sp] = RETX;
85 [--sp] = RETN;
86 [--sp] = RETE;
87 [--sp] = SEQSTAT;
88 [--sp] = SYSCFG;
Robin Getz230d0012009-12-21 16:35:48 -0500[diff] [blame]89#ifdef CONFIG_CMD_KGDB
90 p0.l = lo(IPEND)
91 p0.h = hi(IPEND)
92 r0 = [p0];
93#endif
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]94 [--sp] = r0; /* Skip IPEND as well. */
95.endm
96
97.macro save_context_no_interrupts
98 [--sp] = R0;
99 [--sp] = ( R7:0, P5:0 );
100 [--sp] = fp;
101 [--sp] = usp;
102
103 [--sp] = i0;
104 [--sp] = i1;
105 [--sp] = i2;
106 [--sp] = i3;
107
108 [--sp] = m0;
109 [--sp] = m1;
110 [--sp] = m2;
111 [--sp] = m3;
112
113 [--sp] = l0;
114 [--sp] = l1;
115 [--sp] = l2;
116 [--sp] = l3;
117
118 [--sp] = b0;
119 [--sp] = b1;
120 [--sp] = b2;
121 [--sp] = b3;
122 [--sp] = a0.x;
123 [--sp] = a0.w;
124 [--sp] = a1.x;
125 [--sp] = a1.w;
126
127 [--sp] = LC0;
128 [--sp] = LC1;
129 [--sp] = LT0;
130 [--sp] = LT1;
131 [--sp] = LB0;
132 [--sp] = LB1;
133
134 [--sp] = ASTAT;
135
136 [--sp] = r0; /* Skip reserved */
137 [--sp] = RETS;
138 r0 = RETI;
139 [--sp] = r0;
140 [--sp] = RETX;
141 [--sp] = RETN;
142 [--sp] = RETE;
143 [--sp] = SEQSTAT;
144 [--sp] = SYSCFG;
Robin Getz230d0012009-12-21 16:35:48 -0500[diff] [blame]145#ifdef CONFIG_CMD_KGDB
146 p0.l = lo(IPEND)
147 p0.h = hi(IPEND)
148 r0 = [p0];
149#endif
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]150 [--sp] = r0; /* Skip IPEND as well. */
151.endm
152
153.macro restore_context_no_interrupts
154 sp += 4;
155 SYSCFG = [sp++];
156 SEQSTAT = [sp++];
157 RETE = [sp++];
158 RETN = [sp++];
159 RETX = [sp++];
160 r0 = [sp++];
161 RETI = r0;
162 RETS = [sp++];
163
164 sp += 4;
165
166 ASTAT = [sp++];
167
168 LB1 = [sp++];
169 LB0 = [sp++];
170 LT1 = [sp++];
171 LT0 = [sp++];
172 LC1 = [sp++];
173 LC0 = [sp++];
174
175 a1.w = [sp++];
176 a1.x = [sp++];
177 a0.w = [sp++];
178 a0.x = [sp++];
179 b3 = [sp++];
180 b2 = [sp++];
181 b1 = [sp++];
182 b0 = [sp++];
183
184 l3 = [sp++];
185 l2 = [sp++];
186 l1 = [sp++];
187 l0 = [sp++];
188
189 m3 = [sp++];
190 m2 = [sp++];
191 m1 = [sp++];
192 m0 = [sp++];
193
194 i3 = [sp++];
195 i2 = [sp++];
196 i1 = [sp++];
197 i0 = [sp++];
198
199 sp += 4;
200 fp = [sp++];
201
202 ( R7 : 0, P5 : 0) = [ SP ++ ];
203 sp += 4;
204.endm
205
206.macro restore_context_with_interrupts
207 sp += 4;
208 SYSCFG = [sp++];
209 SEQSTAT = [sp++];
210 RETE = [sp++];
211 RETN = [sp++];
212 RETX = [sp++];
213 RETI = [sp++];
214 RETS = [sp++];
215
216 sp += 4;
217
218 ASTAT = [sp++];
219
220 LB1 = [sp++];
221 LB0 = [sp++];
222 LT1 = [sp++];
223 LT0 = [sp++];
224 LC1 = [sp++];
225 LC0 = [sp++];
226
227 a1.w = [sp++];
228 a1.x = [sp++];
229 a0.w = [sp++];
230 a0.x = [sp++];
231 b3 = [sp++];
232 b2 = [sp++];
233 b1 = [sp++];
234 b0 = [sp++];
235
236 l3 = [sp++];
237 l2 = [sp++];
238 l1 = [sp++];
239 l0 = [sp++];
240
241 m3 = [sp++];
242 m2 = [sp++];
243 m1 = [sp++];
244 m0 = [sp++];
245
246 i3 = [sp++];
247 i2 = [sp++];
248 i1 = [sp++];
249 i0 = [sp++];
250
251 sp += 4;
252 fp = [sp++];
253
254 ( R7 : 0, P5 : 0) = [ SP ++ ];
255 sp += 4;
256.endm
257
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]258#endif
Aubrey.Li9da597f2007-03-09 13:38:44 +0800[diff] [blame]259#endif