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