Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 { | |
84e8cd6d DH |
26 | * | struct frv_frame0 { |
27 | * | struct user_context { | |
28 | * | struct user_int_regs | |
29 | * | struct user_fpmedia_regs | |
30 | * | } | |
31 | * | struct frv_debug_regs | |
32 | * | } | |
1da177e4 LT |
33 | * | struct pt_regs [user exception] |
34 | * | } | |
35 | * +---------------------- <-- __kernel_frame0_ptr (maybe GR28) | |
36 | * | | |
37 | * | kernel stack | |
38 | * | | |
39 | * |...................... | |
40 | * | struct pt_regs [kernel exception] | |
41 | * |...................... <-- __kernel_frame0_ptr (maybe GR28) | |
42 | * | | |
43 | * | kernel stack | |
44 | * | | |
45 | * |...................... <-- stack pointer (GR1) | |
46 | * | | |
47 | * | unused stack space | |
48 | * | | |
49 | * +---------------------- | |
50 | * | struct thread_info | |
51 | * +0x0000 +---------------------- <-- __current_thread_info (GR15); | |
52 | * | |
53 | * note that GR28 points to the current exception frame | |
54 | */ | |
55 | ||
56 | #ifndef _ASM_REGISTERS_H | |
57 | #define _ASM_REGISTERS_H | |
58 | ||
59 | #ifndef __ASSEMBLY__ | |
84e8cd6d | 60 | #define __OFFSET(X,N) ((X)+(N)*4) |
1da177e4 LT |
61 | #define __OFFSETC(X,N) xxxxxxxxxxxxxxxxxxxxxxxx |
62 | #else | |
84e8cd6d DH |
63 | #define __OFFSET(X,N) ((X)+(N)*4) |
64 | #define __OFFSETC(X,N) ((X)+(N)) | |
1da177e4 LT |
65 | #endif |
66 | ||
67 | /*****************************************************************************/ | |
68 | /* | |
69 | * Exception/Interrupt frame | |
70 | * - held on kernel stack | |
71 | * - 8-byte aligned on stack (old SP is saved in frame) | |
72 | * - GR0 is fixed 0, so we don't save it | |
73 | */ | |
74 | #ifndef __ASSEMBLY__ | |
75 | ||
76 | struct pt_regs { | |
77 | unsigned long psr; /* Processor Status Register */ | |
78 | unsigned long isr; /* Integer Status Register */ | |
79 | unsigned long ccr; /* Condition Code Register */ | |
80 | unsigned long cccr; /* Condition Code for Conditional Insns Register */ | |
81 | unsigned long lr; /* Link Register */ | |
82 | unsigned long lcr; /* Loop Count Register */ | |
83 | unsigned long pc; /* Program Counter Register */ | |
84 | unsigned long __status; /* exception status */ | |
85 | unsigned long syscallno; /* syscall number or -1 */ | |
86 | unsigned long orig_gr8; /* original syscall arg #1 */ | |
87 | unsigned long gner0; | |
88 | unsigned long gner1; | |
89 | unsigned long long iacc0; | |
90 | unsigned long tbr; /* GR0 is fixed zero, so we use this for TBR */ | |
91 | unsigned long sp; /* GR1: USP/KSP */ | |
92 | unsigned long fp; /* GR2: FP */ | |
93 | unsigned long gr3; | |
94 | unsigned long gr4; | |
95 | unsigned long gr5; | |
96 | unsigned long gr6; | |
97 | unsigned long gr7; /* syscall number */ | |
98 | unsigned long gr8; /* 1st syscall param; syscall return */ | |
99 | unsigned long gr9; /* 2nd syscall param */ | |
100 | unsigned long gr10; /* 3rd syscall param */ | |
101 | unsigned long gr11; /* 4th syscall param */ | |
102 | unsigned long gr12; /* 5th syscall param */ | |
103 | unsigned long gr13; /* 6th syscall param */ | |
104 | unsigned long gr14; | |
105 | unsigned long gr15; | |
106 | unsigned long gr16; /* GP pointer */ | |
107 | unsigned long gr17; /* small data */ | |
108 | unsigned long gr18; /* PIC/PID */ | |
109 | unsigned long gr19; | |
110 | unsigned long gr20; | |
111 | unsigned long gr21; | |
112 | unsigned long gr22; | |
113 | unsigned long gr23; | |
114 | unsigned long gr24; | |
115 | unsigned long gr25; | |
116 | unsigned long gr26; | |
117 | unsigned long gr27; | |
118 | struct pt_regs *next_frame; /* GR28 - next exception frame */ | |
119 | unsigned long gr29; /* GR29 - OS reserved */ | |
120 | unsigned long gr30; /* GR30 - OS reserved */ | |
121 | unsigned long gr31; /* GR31 - OS reserved */ | |
122 | } __attribute__((aligned(8))); | |
123 | ||
124 | #endif | |
125 | ||
1da177e4 LT |
126 | #define REG__STATUS_STEP 0x00000001 /* - reenable single stepping on return */ |
127 | #define REG__STATUS_STEPPED 0x00000002 /* - single step caused exception */ | |
128 | #define REG__STATUS_BROKE 0x00000004 /* - BREAK insn caused exception */ | |
129 | #define REG__STATUS_SYSC_ENTRY 0x40000000 /* - T on syscall entry (ptrace.c only) */ | |
130 | #define REG__STATUS_SYSC_EXIT 0x80000000 /* - T on syscall exit (ptrace.c only) */ | |
131 | ||
84e8cd6d | 132 | #define REG_GR(R) __OFFSET(REG_GR0, (R)) |
1da177e4 LT |
133 | |
134 | #define REG_SP REG_GR(1) | |
135 | #define REG_FP REG_GR(2) | |
136 | #define REG_PREV_FRAME REG_GR(28) /* previous exception frame pointer (old gr28 value) */ | |
137 | #define REG_CURR_TASK REG_GR(29) /* current task */ | |
138 | ||
139 | /*****************************************************************************/ | |
140 | /* | |
84e8cd6d | 141 | * debugging registers |
1da177e4 LT |
142 | */ |
143 | #ifndef __ASSEMBLY__ | |
144 | ||
84e8cd6d | 145 | struct frv_debug_regs |
1da177e4 | 146 | { |
1da177e4 | 147 | unsigned long dcr; |
84e8cd6d DH |
148 | unsigned long ibar[4] __attribute__((aligned(8))); |
149 | unsigned long dbar[4] __attribute__((aligned(8))); | |
150 | unsigned long dbdr[4][4] __attribute__((aligned(8))); | |
151 | unsigned long dbmr[4][4] __attribute__((aligned(8))); | |
1da177e4 LT |
152 | } __attribute__((aligned(8))); |
153 | ||
154 | #endif | |
155 | ||
1da177e4 LT |
156 | /*****************************************************************************/ |
157 | /* | |
158 | * userspace registers | |
159 | */ | |
160 | #ifndef __ASSEMBLY__ | |
161 | ||
162 | struct user_int_regs | |
163 | { | |
164 | /* integer registers | |
165 | * - up to gr[31] mirror pt_regs | |
166 | * - total size must be multiple of 8 bytes | |
167 | */ | |
168 | unsigned long psr; /* Processor Status Register */ | |
169 | unsigned long isr; /* Integer Status Register */ | |
170 | unsigned long ccr; /* Condition Code Register */ | |
171 | unsigned long cccr; /* Condition Code for Conditional Insns Register */ | |
172 | unsigned long lr; /* Link Register */ | |
173 | unsigned long lcr; /* Loop Count Register */ | |
174 | unsigned long pc; /* Program Counter Register */ | |
175 | unsigned long __status; /* exception status */ | |
176 | unsigned long syscallno; /* syscall number or -1 */ | |
177 | unsigned long orig_gr8; /* original syscall arg #1 */ | |
178 | unsigned long gner[2]; | |
179 | unsigned long long iacc[1]; | |
180 | ||
181 | union { | |
182 | unsigned long tbr; | |
183 | unsigned long gr[64]; | |
184 | }; | |
185 | }; | |
186 | ||
187 | struct user_fpmedia_regs | |
188 | { | |
189 | /* FP/Media registers */ | |
190 | unsigned long fr[64]; | |
191 | unsigned long fner[2]; | |
192 | unsigned long msr[2]; | |
193 | unsigned long acc[8]; | |
194 | unsigned char accg[8]; | |
195 | unsigned long fsr[1]; | |
196 | }; | |
197 | ||
198 | struct user_context | |
199 | { | |
200 | struct user_int_regs i; | |
201 | struct user_fpmedia_regs f; | |
202 | ||
203 | /* we provide a context extension so that we can save the regs for CPUs that | |
204 | * implement many more of Fujitsu's lavish register spec | |
205 | */ | |
206 | void *extension; | |
207 | } __attribute__((aligned(8))); | |
208 | ||
84e8cd6d DH |
209 | struct frv_frame0 { |
210 | union { | |
211 | struct pt_regs regs; | |
212 | struct user_context uc; | |
213 | }; | |
214 | ||
215 | struct frv_debug_regs debug; | |
216 | ||
217 | } __attribute__((aligned(32))); | |
218 | ||
1da177e4 LT |
219 | #endif |
220 | ||
84e8cd6d DH |
221 | #define __INT_GR(R) __OFFSET(__INT_GR0, (R)) |
222 | ||
223 | #define __FPMEDIA_FR(R) __OFFSET(__FPMEDIA_FR0, (R)) | |
224 | #define __FPMEDIA_FNER(R) __OFFSET(__FPMEDIA_FNER0, (R)) | |
225 | #define __FPMEDIA_MSR(R) __OFFSET(__FPMEDIA_MSR0, (R)) | |
226 | #define __FPMEDIA_ACC(R) __OFFSET(__FPMEDIA_ACC0, (R)) | |
227 | #define __FPMEDIA_ACCG(R) __OFFSETC(__FPMEDIA_ACCG0, (R)) | |
228 | #define __FPMEDIA_FSR(R) __OFFSET(__FPMEDIA_FSR0, (R)) | |
229 | ||
230 | #define __THREAD_GR(R) __OFFSET(__THREAD_GR16, (R) - 16) | |
1da177e4 LT |
231 | |
232 | #endif /* _ASM_REGISTERS_H */ |