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git01.mediatek.com / filogic / uboot / 66c4cf437bceb0c3a4878b61d3e08c21b81d2cbb / . / include / asm-blackfin / entry.h
blob: ef74d686af89f708699ac9dc3ebcd275cd59d491 [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;
89 [--sp] = r0; /* Skip IPEND as well. */
90.endm
91
92.macro save_context_no_interrupts
93 [--sp] = R0;
94 [--sp] = ( R7:0, P5:0 );
95 [--sp] = fp;
96 [--sp] = usp;
97
98 [--sp] = i0;
99 [--sp] = i1;
100 [--sp] = i2;
101 [--sp] = i3;
102
103 [--sp] = m0;
104 [--sp] = m1;
105 [--sp] = m2;
106 [--sp] = m3;
107
108 [--sp] = l0;
109 [--sp] = l1;
110 [--sp] = l2;
111 [--sp] = l3;
112
113 [--sp] = b0;
114 [--sp] = b1;
115 [--sp] = b2;
116 [--sp] = b3;
117 [--sp] = a0.x;
118 [--sp] = a0.w;
119 [--sp] = a1.x;
120 [--sp] = a1.w;
121
122 [--sp] = LC0;
123 [--sp] = LC1;
124 [--sp] = LT0;
125 [--sp] = LT1;
126 [--sp] = LB0;
127 [--sp] = LB1;
128
129 [--sp] = ASTAT;
130
131 [--sp] = r0; /* Skip reserved */
132 [--sp] = RETS;
133 r0 = RETI;
134 [--sp] = r0;
135 [--sp] = RETX;
136 [--sp] = RETN;
137 [--sp] = RETE;
138 [--sp] = SEQSTAT;
139 [--sp] = SYSCFG;
140 [--sp] = r0; /* Skip IPEND as well. */
141.endm
142
143.macro restore_context_no_interrupts
144 sp += 4;
145 SYSCFG = [sp++];
146 SEQSTAT = [sp++];
147 RETE = [sp++];
148 RETN = [sp++];
149 RETX = [sp++];
150 r0 = [sp++];
151 RETI = r0;
152 RETS = [sp++];
153
154 sp += 4;
155
156 ASTAT = [sp++];
157
158 LB1 = [sp++];
159 LB0 = [sp++];
160 LT1 = [sp++];
161 LT0 = [sp++];
162 LC1 = [sp++];
163 LC0 = [sp++];
164
165 a1.w = [sp++];
166 a1.x = [sp++];
167 a0.w = [sp++];
168 a0.x = [sp++];
169 b3 = [sp++];
170 b2 = [sp++];
171 b1 = [sp++];
172 b0 = [sp++];
173
174 l3 = [sp++];
175 l2 = [sp++];
176 l1 = [sp++];
177 l0 = [sp++];
178
179 m3 = [sp++];
180 m2 = [sp++];
181 m1 = [sp++];
182 m0 = [sp++];
183
184 i3 = [sp++];
185 i2 = [sp++];
186 i1 = [sp++];
187 i0 = [sp++];
188
189 sp += 4;
190 fp = [sp++];
191
192 ( R7 : 0, P5 : 0) = [ SP ++ ];
193 sp += 4;
194.endm
195
196.macro restore_context_with_interrupts
197 sp += 4;
198 SYSCFG = [sp++];
199 SEQSTAT = [sp++];
200 RETE = [sp++];
201 RETN = [sp++];
202 RETX = [sp++];
203 RETI = [sp++];
204 RETS = [sp++];
205
206 sp += 4;
207
208 ASTAT = [sp++];
209
210 LB1 = [sp++];
211 LB0 = [sp++];
212 LT1 = [sp++];
213 LT0 = [sp++];
214 LC1 = [sp++];
215 LC0 = [sp++];
216
217 a1.w = [sp++];
218 a1.x = [sp++];
219 a0.w = [sp++];
220 a0.x = [sp++];
221 b3 = [sp++];
222 b2 = [sp++];
223 b1 = [sp++];
224 b0 = [sp++];
225
226 l3 = [sp++];
227 l2 = [sp++];
228 l1 = [sp++];
229 l0 = [sp++];
230
231 m3 = [sp++];
232 m2 = [sp++];
233 m1 = [sp++];
234 m0 = [sp++];
235
236 i3 = [sp++];
237 i2 = [sp++];
238 i1 = [sp++];
239 i0 = [sp++];
240
241 sp += 4;
242 fp = [sp++];
243
244 ( R7 : 0, P5 : 0) = [ SP ++ ];
245 sp += 4;
246.endm
247
Wolfgang Denk97caf672006-03-12 02:12:27 +0100[diff] [blame]248#endif
Aubrey.Li9da597f2007-03-09 13:38:44 +0800[diff] [blame]249#endif