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1 | /* registers.h: register frame declarations |
2 | * | |
3 | * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | /* | |
13 | * notes: | |
14 | * | |
15 | * (1) that the members of all these structures are carefully aligned to permit | |
16 | * usage of STD/STDF instructions | |
17 | * | |
18 | * (2) if you change these structures, you must change the code in | |
19 | * arch/frvnommu/kernel/{break.S,entry.S,switch_to.S,gdb-stub.c} | |
20 | * | |
21 | * | |
22 | * the kernel stack space block looks like this: | |
23 | * | |
24 | * +0x2000 +---------------------- | |
25 | * | union { | |
26 | * | struct user_context | |
27 | * | struct pt_regs [user exception] | |
28 | * | } | |
29 | * +---------------------- <-- __kernel_frame0_ptr (maybe GR28) | |
30 | * | | |
31 | * | kernel stack | |
32 | * | | |
33 | * |...................... | |
34 | * | struct pt_regs [kernel exception] | |
35 | * |...................... <-- __kernel_frame0_ptr (maybe GR28) | |
36 | * | | |
37 | * | kernel stack | |
38 | * | | |
39 | * |...................... <-- stack pointer (GR1) | |
40 | * | | |
41 | * | unused stack space | |
42 | * | | |
43 | * +---------------------- | |
44 | * | struct thread_info | |
45 | * +0x0000 +---------------------- <-- __current_thread_info (GR15); | |
46 | * | |
47 | * note that GR28 points to the current exception frame | |
48 | */ | |
49 | ||
50 | #ifndef _ASM_REGISTERS_H | |
51 | #define _ASM_REGISTERS_H | |
52 | ||
53 | #ifndef __ASSEMBLY__ | |
54 | #define __OFFSET(X) (X) | |
55 | #define __OFFSETC(X,N) xxxxxxxxxxxxxxxxxxxxxxxx | |
56 | #else | |
57 | #define __OFFSET(X) ((X)*4) | |
58 | #define __OFFSETC(X,N) ((X)*4+(N)) | |
59 | #endif | |
60 | ||
61 | /*****************************************************************************/ | |
62 | /* | |
63 | * Exception/Interrupt frame | |
64 | * - held on kernel stack | |
65 | * - 8-byte aligned on stack (old SP is saved in frame) | |
66 | * - GR0 is fixed 0, so we don't save it | |
67 | */ | |
68 | #ifndef __ASSEMBLY__ | |
69 | ||
70 | struct pt_regs { | |
71 | unsigned long psr; /* Processor Status Register */ | |
72 | unsigned long isr; /* Integer Status Register */ | |
73 | unsigned long ccr; /* Condition Code Register */ | |
74 | unsigned long cccr; /* Condition Code for Conditional Insns Register */ | |
75 | unsigned long lr; /* Link Register */ | |
76 | unsigned long lcr; /* Loop Count Register */ | |
77 | unsigned long pc; /* Program Counter Register */ | |
78 | unsigned long __status; /* exception status */ | |
79 | unsigned long syscallno; /* syscall number or -1 */ | |
80 | unsigned long orig_gr8; /* original syscall arg #1 */ | |
81 | unsigned long gner0; | |
82 | unsigned long gner1; | |
83 | unsigned long long iacc0; | |
84 | unsigned long tbr; /* GR0 is fixed zero, so we use this for TBR */ | |
85 | unsigned long sp; /* GR1: USP/KSP */ | |
86 | unsigned long fp; /* GR2: FP */ | |
87 | unsigned long gr3; | |
88 | unsigned long gr4; | |
89 | unsigned long gr5; | |
90 | unsigned long gr6; | |
91 | unsigned long gr7; /* syscall number */ | |
92 | unsigned long gr8; /* 1st syscall param; syscall return */ | |
93 | unsigned long gr9; /* 2nd syscall param */ | |
94 | unsigned long gr10; /* 3rd syscall param */ | |
95 | unsigned long gr11; /* 4th syscall param */ | |
96 | unsigned long gr12; /* 5th syscall param */ | |
97 | unsigned long gr13; /* 6th syscall param */ | |
98 | unsigned long gr14; | |
99 | unsigned long gr15; | |
100 | unsigned long gr16; /* GP pointer */ | |
101 | unsigned long gr17; /* small data */ | |
102 | unsigned long gr18; /* PIC/PID */ | |
103 | unsigned long gr19; | |
104 | unsigned long gr20; | |
105 | unsigned long gr21; | |
106 | unsigned long gr22; | |
107 | unsigned long gr23; | |
108 | unsigned long gr24; | |
109 | unsigned long gr25; | |
110 | unsigned long gr26; | |
111 | unsigned long gr27; | |
112 | struct pt_regs *next_frame; /* GR28 - next exception frame */ | |
113 | unsigned long gr29; /* GR29 - OS reserved */ | |
114 | unsigned long gr30; /* GR30 - OS reserved */ | |
115 | unsigned long gr31; /* GR31 - OS reserved */ | |
116 | } __attribute__((aligned(8))); | |
117 | ||
118 | #endif | |
119 | ||
120 | #define REG_PSR __OFFSET( 0) /* Processor Status Register */ | |
121 | #define REG_ISR __OFFSET( 1) /* Integer Status Register */ | |
122 | #define REG_CCR __OFFSET( 2) /* Condition Code Register */ | |
123 | #define REG_CCCR __OFFSET( 3) /* Condition Code for Conditional Insns Register */ | |
124 | #define REG_LR __OFFSET( 4) /* Link Register */ | |
125 | #define REG_LCR __OFFSET( 5) /* Loop Count Register */ | |
126 | #define REG_PC __OFFSET( 6) /* Program Counter */ | |
127 | ||
128 | #define REG__STATUS __OFFSET( 7) /* exception status */ | |
129 | #define REG__STATUS_STEP 0x00000001 /* - reenable single stepping on return */ | |
130 | #define REG__STATUS_STEPPED 0x00000002 /* - single step caused exception */ | |
131 | #define REG__STATUS_BROKE 0x00000004 /* - BREAK insn caused exception */ | |
132 | #define REG__STATUS_SYSC_ENTRY 0x40000000 /* - T on syscall entry (ptrace.c only) */ | |
133 | #define REG__STATUS_SYSC_EXIT 0x80000000 /* - T on syscall exit (ptrace.c only) */ | |
134 | ||
135 | #define REG_SYSCALLNO __OFFSET( 8) /* syscall number or -1 */ | |
136 | #define REG_ORIG_GR8 __OFFSET( 9) /* saved GR8 for signal handling */ | |
137 | #define REG_GNER0 __OFFSET(10) | |
138 | #define REG_GNER1 __OFFSET(11) | |
139 | #define REG_IACC0 __OFFSET(12) | |
140 | ||
141 | #define REG_TBR __OFFSET(14) /* Trap Vector Register */ | |
142 | #define REG_GR(R) __OFFSET((14+(R))) | |
143 | #define REG__END REG_GR(32) | |
144 | ||
145 | #define REG_SP REG_GR(1) | |
146 | #define REG_FP REG_GR(2) | |
147 | #define REG_PREV_FRAME REG_GR(28) /* previous exception frame pointer (old gr28 value) */ | |
148 | #define REG_CURR_TASK REG_GR(29) /* current task */ | |
149 | ||
150 | /*****************************************************************************/ | |
151 | /* | |
152 | * extension tacked in front of the exception frame in debug mode | |
153 | */ | |
154 | #ifndef __ASSEMBLY__ | |
155 | ||
156 | struct pt_debug_regs | |
157 | { | |
158 | unsigned long bpsr; | |
159 | unsigned long dcr; | |
160 | unsigned long brr; | |
161 | unsigned long nmar; | |
162 | struct pt_regs normal_regs; | |
163 | } __attribute__((aligned(8))); | |
164 | ||
165 | #endif | |
166 | ||
167 | #define REG_NMAR __OFFSET(-1) | |
168 | #define REG_BRR __OFFSET(-2) | |
169 | #define REG_DCR __OFFSET(-3) | |
170 | #define REG_BPSR __OFFSET(-4) | |
171 | #define REG__DEBUG_XTRA __OFFSET(4) | |
172 | ||
173 | /*****************************************************************************/ | |
174 | /* | |
175 | * userspace registers | |
176 | */ | |
177 | #ifndef __ASSEMBLY__ | |
178 | ||
179 | struct user_int_regs | |
180 | { | |
181 | /* integer registers | |
182 | * - up to gr[31] mirror pt_regs | |
183 | * - total size must be multiple of 8 bytes | |
184 | */ | |
185 | unsigned long psr; /* Processor Status Register */ | |
186 | unsigned long isr; /* Integer Status Register */ | |
187 | unsigned long ccr; /* Condition Code Register */ | |
188 | unsigned long cccr; /* Condition Code for Conditional Insns Register */ | |
189 | unsigned long lr; /* Link Register */ | |
190 | unsigned long lcr; /* Loop Count Register */ | |
191 | unsigned long pc; /* Program Counter Register */ | |
192 | unsigned long __status; /* exception status */ | |
193 | unsigned long syscallno; /* syscall number or -1 */ | |
194 | unsigned long orig_gr8; /* original syscall arg #1 */ | |
195 | unsigned long gner[2]; | |
196 | unsigned long long iacc[1]; | |
197 | ||
198 | union { | |
199 | unsigned long tbr; | |
200 | unsigned long gr[64]; | |
201 | }; | |
202 | }; | |
203 | ||
204 | struct user_fpmedia_regs | |
205 | { | |
206 | /* FP/Media registers */ | |
207 | unsigned long fr[64]; | |
208 | unsigned long fner[2]; | |
209 | unsigned long msr[2]; | |
210 | unsigned long acc[8]; | |
211 | unsigned char accg[8]; | |
212 | unsigned long fsr[1]; | |
213 | }; | |
214 | ||
215 | struct user_context | |
216 | { | |
217 | struct user_int_regs i; | |
218 | struct user_fpmedia_regs f; | |
219 | ||
220 | /* we provide a context extension so that we can save the regs for CPUs that | |
221 | * implement many more of Fujitsu's lavish register spec | |
222 | */ | |
223 | void *extension; | |
224 | } __attribute__((aligned(8))); | |
225 | ||
226 | #endif | |
227 | ||
228 | #define NR_USER_INT_REGS (14 + 64) | |
229 | #define NR_USER_FPMEDIA_REGS (64 + 2 + 2 + 8 + 8/4 + 1) | |
230 | #define NR_USER_CONTEXT (NR_USER_INT_REGS + NR_USER_FPMEDIA_REGS + 1) | |
231 | ||
232 | #define USER_CONTEXT_SIZE (((NR_USER_CONTEXT + 1) & ~1) * 4) | |
233 | ||
234 | #define __THREAD_FRAME __OFFSET(0) | |
235 | #define __THREAD_CURR __OFFSET(1) | |
236 | #define __THREAD_SP __OFFSET(2) | |
237 | #define __THREAD_FP __OFFSET(3) | |
238 | #define __THREAD_LR __OFFSET(4) | |
239 | #define __THREAD_PC __OFFSET(5) | |
240 | #define __THREAD_GR(R) __OFFSET(6 + (R) - 16) | |
241 | #define __THREAD_FRAME0 __OFFSET(19) | |
242 | #define __THREAD_USER __OFFSET(19) | |
243 | ||
244 | #define __USER_INT __OFFSET(0) | |
245 | #define __INT_GR(R) __OFFSET(14 + (R)) | |
246 | ||
247 | #define __USER_FPMEDIA __OFFSET(NR_USER_INT_REGS) | |
248 | #define __FPMEDIA_FR(R) __OFFSET(NR_USER_INT_REGS + (R)) | |
249 | #define __FPMEDIA_FNER(R) __OFFSET(NR_USER_INT_REGS + 64 + (R)) | |
250 | #define __FPMEDIA_MSR(R) __OFFSET(NR_USER_INT_REGS + 66 + (R)) | |
251 | #define __FPMEDIA_ACC(R) __OFFSET(NR_USER_INT_REGS + 68 + (R)) | |
252 | #define __FPMEDIA_ACCG(R) __OFFSETC(NR_USER_INT_REGS + 76, (R)) | |
253 | #define __FPMEDIA_FSR(R) __OFFSET(NR_USER_INT_REGS + 78 + (R)) | |
254 | ||
255 | #endif /* _ASM_REGISTERS_H */ |