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1 | # |
1 | # |
2 | # Copyright (C) 2006 Martin Decky |
2 | # Copyright (C) 2006 Martin Decky |
3 | # All rights reserved. |
3 | # All rights reserved. |
4 | # |
4 | # |
5 | # Redistribution and use in source and binary forms, with or without |
5 | # Redistribution and use in source and binary forms, with or without |
6 | # modification, are permitted provided that the following conditions |
6 | # modification, are permitted provided that the following conditions |
7 | # are met: |
7 | # are met: |
8 | # |
8 | # |
9 | # - Redistributions of source code must retain the above copyright |
9 | # - Redistributions of source code must retain the above copyright |
10 | # notice, this list of conditions and the following disclaimer. |
10 | # notice, this list of conditions and the following disclaimer. |
11 | # - Redistributions in binary form must reproduce the above copyright |
11 | # - Redistributions in binary form must reproduce the above copyright |
12 | # notice, this list of conditions and the following disclaimer in the |
12 | # notice, this list of conditions and the following disclaimer in the |
13 | # documentation and/or other materials provided with the distribution. |
13 | # documentation and/or other materials provided with the distribution. |
14 | # - The name of the author may not be used to endorse or promote products |
14 | # - The name of the author may not be used to endorse or promote products |
15 | # derived from this software without specific prior written permission. |
15 | # derived from this software without specific prior written permission. |
16 | # |
16 | # |
17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | # |
27 | # |
28 | 28 | ||
29 | #include <arch/asm/regname.h> |
29 | #include <arch/asm/regname.h> |
30 | #include <arch/mm/page.h> |
30 | #include <arch/mm/page.h> |
31 | 31 | ||
32 | .section K_UNMAPPED_TEXT_START, "ax" |
32 | .section K_UNMAPPED_TEXT_START, "ax" |
33 | 33 | ||
34 | .macro CONTEXT_STORE |
34 | .macro CONTEXT_STORE |
35 | 35 | ||
36 | # save R12 in SPRG1, backup CR in R12 |
36 | # save R12 in SPRG1, backup CR in R12 |
37 | # save SP in SPRG2 |
37 | # save SP in SPRG2 |
38 | 38 | ||
39 | mtsprg1 r12 |
39 | mtsprg1 r12 |
40 | mfcr r12 |
40 | mfcr r12 |
41 | mtsprg2 sp |
41 | mtsprg2 sp |
42 | 42 | ||
43 | # check whether SP is in kernel |
43 | # check whether SP is in kernel |
44 | 44 | ||
45 | andis. sp, sp, 0x8000 |
45 | andis. sp, sp, 0x8000 |
46 | bne 1f |
46 | bne 1f |
47 | 47 | ||
48 | # stack is in user-space |
48 | # stack is in user-space |
49 | 49 | ||
50 | mfsprg0 sp |
50 | mfsprg0 sp |
51 | 51 | ||
52 | b 2f |
52 | b 2f |
53 | 53 | ||
54 | 1: |
54 | 1: |
55 | 55 | ||
56 | # stack is in kernel |
56 | # stack is in kernel |
57 | 57 | ||
58 | mfsprg2 sp |
58 | mfsprg2 sp |
59 | subis sp, sp, 0x8000 |
59 | subis sp, sp, 0x8000 |
60 | 60 | ||
61 | 2: |
61 | 2: |
62 | 62 | ||
63 | subi sp, sp, 160 |
63 | subi sp, sp, 160 |
64 | stw r0, 8(sp) |
64 | stw r0, 8(sp) |
65 | stw r2, 12(sp) |
65 | stw r2, 12(sp) |
66 | stw r3, 16(sp) |
66 | stw r3, 16(sp) |
67 | stw r4, 20(sp) |
67 | stw r4, 20(sp) |
68 | stw r5, 24(sp) |
68 | stw r5, 24(sp) |
69 | stw r6, 28(sp) |
69 | stw r6, 28(sp) |
70 | stw r7, 32(sp) |
70 | stw r7, 32(sp) |
71 | stw r8, 36(sp) |
71 | stw r8, 36(sp) |
72 | stw r9, 40(sp) |
72 | stw r9, 40(sp) |
73 | stw r10, 44(sp) |
73 | stw r10, 44(sp) |
74 | stw r11, 48(sp) |
74 | stw r11, 48(sp) |
75 | stw r13, 52(sp) |
75 | stw r13, 52(sp) |
76 | stw r14, 56(sp) |
76 | stw r14, 56(sp) |
77 | stw r15, 60(sp) |
77 | stw r15, 60(sp) |
78 | stw r16, 64(sp) |
78 | stw r16, 64(sp) |
79 | stw r17, 68(sp) |
79 | stw r17, 68(sp) |
80 | stw r18, 72(sp) |
80 | stw r18, 72(sp) |
81 | stw r19, 76(sp) |
81 | stw r19, 76(sp) |
82 | stw r20, 80(sp) |
82 | stw r20, 80(sp) |
83 | stw r21, 84(sp) |
83 | stw r21, 84(sp) |
84 | stw r22, 88(sp) |
84 | stw r22, 88(sp) |
85 | stw r23, 92(sp) |
85 | stw r23, 92(sp) |
86 | stw r24, 96(sp) |
86 | stw r24, 96(sp) |
87 | stw r25, 100(sp) |
87 | stw r25, 100(sp) |
88 | stw r26, 104(sp) |
88 | stw r26, 104(sp) |
89 | stw r27, 108(sp) |
89 | stw r27, 108(sp) |
90 | stw r28, 112(sp) |
90 | stw r28, 112(sp) |
91 | stw r29, 116(sp) |
91 | stw r29, 116(sp) |
92 | stw r30, 120(sp) |
92 | stw r30, 120(sp) |
93 | stw r31, 124(sp) |
93 | stw r31, 124(sp) |
94 | 94 | ||
95 | stw r12, 128(sp) |
95 | stw r12, 128(sp) |
96 | 96 | ||
97 | mfsrr0 r12 |
97 | mfsrr0 r12 |
98 | stw r12, 132(sp) |
98 | stw r12, 132(sp) |
99 | 99 | ||
100 | mfsrr1 r12 |
100 | mfsrr1 r12 |
101 | stw r12, 136(sp) |
101 | stw r12, 136(sp) |
102 | 102 | ||
103 | mflr r12 |
103 | mflr r12 |
104 | stw r12, 140(sp) |
104 | stw r12, 140(sp) |
105 | 105 | ||
106 | mfctr r12 |
106 | mfctr r12 |
107 | stw r12, 144(sp) |
107 | stw r12, 144(sp) |
108 | 108 | ||
109 | mfxer r12 |
109 | mfxer r12 |
110 | stw r12, 148(sp) |
110 | stw r12, 148(sp) |
111 | 111 | ||
112 | mfsprg1 r12 |
112 | mfsprg1 r12 |
113 | stw r12, 152(sp) |
113 | stw r12, 152(sp) |
114 | 114 | ||
115 | mfsprg2 r12 |
115 | mfsprg2 r12 |
116 | stw r12, 156(sp) |
116 | stw r12, 156(sp) |
117 | .endm |
117 | .endm |
118 | 118 | ||
119 | .org 0x100 |
119 | .org 0x100 |
120 | .global exc_system_reset |
120 | .global exc_system_reset |
121 | exc_system_reset: |
121 | exc_system_reset: |
122 | CONTEXT_STORE |
122 | CONTEXT_STORE |
123 | 123 | ||
124 | lis r12, exc_dispatch@ha |
- | |
125 | addi r12, r12, exc_dispatch@l |
- | |
126 | mtsrr0 r12 |
- | |
127 | - | ||
128 | li r3, 0 |
124 | li r3, 0 |
129 | b jump_to_kernel |
125 | b jump_to_kernel |
130 | 126 | ||
131 | .org 0x200 |
127 | .org 0x200 |
132 | .global exc_machine_check |
128 | .global exc_machine_check |
133 | exc_machine_check: |
129 | exc_machine_check: |
134 | CONTEXT_STORE |
130 | CONTEXT_STORE |
135 | 131 | ||
136 | lis r12, exc_dispatch@ha |
- | |
137 | addi r12, r12, exc_dispatch@l |
- | |
138 | mtsrr0 r12 |
- | |
139 | - | ||
140 | li r3, 1 |
132 | li r3, 1 |
141 | b jump_to_kernel |
133 | b jump_to_kernel |
142 | 134 | ||
143 | .org 0x300 |
135 | .org 0x300 |
144 | .global exc_data_storage |
136 | .global exc_data_storage |
145 | exc_data_storage: |
137 | exc_data_storage: |
146 | CONTEXT_STORE |
138 | CONTEXT_STORE |
147 | 139 | ||
- | 140 | # li r3, 2 |
|
148 | lis r12, exc_dispatch@ha |
141 | # mr r4, sp |
149 | addi r12, r12, exc_dispatch@l |
142 | # addi r4, r4, 8 |
- | 143 | # bl pht_real_refill |
|
- | 144 | ||
150 | mtsrr0 r12 |
145 | # cmpwi r3, 0 |
- | 146 | # bne iret_real |
|
151 | 147 | ||
152 | li r3, 2 |
148 | li r3, 2 |
153 | b jump_to_kernel |
149 | b jump_to_kernel |
154 | 150 | ||
155 | .org 0x400 |
151 | .org 0x400 |
156 | .global exc_instruction_storage |
152 | .global exc_instruction_storage |
157 | exc_instruction_storage: |
153 | exc_instruction_storage: |
158 | CONTEXT_STORE |
154 | CONTEXT_STORE |
159 | 155 | ||
- | 156 | # li r3, 3 |
|
160 | lis r12, exc_dispatch@ha |
157 | # mr r4, sp |
161 | addi r12, r12, exc_dispatch@l |
158 | # addi r4, r4, 8 |
162 | mtsrr0 r12 |
159 | # bl pht_real_refill |
163 | 160 | ||
- | 161 | # cmpwi r3, 0 |
|
- | 162 | # bne iret_real |
|
- | 163 | ||
164 | li r3, 3 |
164 | li r3, 3 |
165 | b jump_to_kernel |
165 | b jump_to_kernel |
166 | 166 | ||
167 | .org 0x500 |
167 | .org 0x500 |
168 | .global exc_external |
168 | .global exc_external |
169 | exc_external: |
169 | exc_external: |
170 | CONTEXT_STORE |
170 | CONTEXT_STORE |
171 | 171 | ||
172 | lis r12, exc_dispatch@ha |
- | |
173 | addi r12, r12, exc_dispatch@l |
- | |
174 | mtsrr0 r12 |
- | |
175 | - | ||
176 | li r3, 4 |
172 | li r3, 4 |
177 | b jump_to_kernel |
173 | b jump_to_kernel |
178 | 174 | ||
179 | .org 0x600 |
175 | .org 0x600 |
180 | .global exc_alignment |
176 | .global exc_alignment |
181 | exc_alignment: |
177 | exc_alignment: |
182 | CONTEXT_STORE |
178 | CONTEXT_STORE |
183 | 179 | ||
184 | lis r12, exc_dispatch@ha |
- | |
185 | addi r12, r12, exc_dispatch@l |
- | |
186 | mtsrr0 r12 |
- | |
187 | - | ||
188 | li r3, 5 |
180 | li r3, 5 |
189 | b jump_to_kernel |
181 | b jump_to_kernel |
190 | 182 | ||
191 | .org 0x700 |
183 | .org 0x700 |
192 | .global exc_program |
184 | .global exc_program |
193 | exc_program: |
185 | exc_program: |
194 | CONTEXT_STORE |
186 | CONTEXT_STORE |
195 | 187 | ||
196 | lis r12, exc_dispatch@ha |
- | |
197 | addi r12, r12, exc_dispatch@l |
- | |
198 | mtsrr0 r12 |
- | |
199 | - | ||
200 | li r3, 6 |
188 | li r3, 6 |
201 | b jump_to_kernel |
189 | b jump_to_kernel |
202 | 190 | ||
203 | .org 0x800 |
191 | .org 0x800 |
204 | .global exc_fp_unavailable |
192 | .global exc_fp_unavailable |
205 | exc_fp_unavailable: |
193 | exc_fp_unavailable: |
206 | CONTEXT_STORE |
194 | CONTEXT_STORE |
207 | 195 | ||
208 | lis r12, exc_dispatch@ha |
- | |
209 | addi r12, r12, exc_dispatch@l |
- | |
210 | mtsrr0 r12 |
- | |
211 | - | ||
212 | li r3, 7 |
196 | li r3, 7 |
213 | b jump_to_kernel |
197 | b jump_to_kernel |
214 | 198 | ||
215 | .org 0x900 |
199 | .org 0x900 |
216 | .global exc_decrementer |
200 | .global exc_decrementer |
217 | exc_decrementer: |
201 | exc_decrementer: |
218 | CONTEXT_STORE |
202 | CONTEXT_STORE |
219 | - | ||
220 | lis r12, exc_dispatch@ha |
- | |
221 | addi r12, r12, exc_dispatch@l |
- | |
222 | mtsrr0 r12 |
- | |
223 | 203 | ||
224 | li r3, 8 |
204 | li r3, 8 |
225 | b jump_to_kernel |
205 | b jump_to_kernel |
226 | 206 | ||
227 | .org 0xa00 |
207 | .org 0xa00 |
228 | .global exc_reserved0 |
208 | .global exc_reserved0 |
229 | exc_reserved0: |
209 | exc_reserved0: |
230 | CONTEXT_STORE |
210 | CONTEXT_STORE |
231 | 211 | ||
232 | lis r12, exc_dispatch@ha |
- | |
233 | addi r12, r12, exc_dispatch@l |
- | |
234 | mtsrr0 r12 |
- | |
235 | - | ||
236 | li r3, 9 |
212 | li r3, 9 |
237 | b jump_to_kernel |
213 | b jump_to_kernel |
238 | 214 | ||
239 | .org 0xb00 |
215 | .org 0xb00 |
240 | .global exc_reserved1 |
216 | .global exc_reserved1 |
241 | exc_reserved1: |
217 | exc_reserved1: |
242 | CONTEXT_STORE |
218 | CONTEXT_STORE |
243 | 219 | ||
244 | lis r12, exc_dispatch@ha |
- | |
245 | addi r12, r12, exc_dispatch@l |
- | |
246 | mtsrr0 r12 |
- | |
247 | - | ||
248 | li r3, 10 |
220 | li r3, 10 |
249 | b jump_to_kernel |
221 | b jump_to_kernel |
250 | 222 | ||
251 | .org 0xc00 |
223 | .org 0xc00 |
252 | .global exc_syscall |
224 | .global exc_syscall |
253 | exc_syscall: |
225 | exc_syscall: |
254 | CONTEXT_STORE |
226 | CONTEXT_STORE |
255 | 227 | ||
256 | b jump_to_kernel_syscall |
228 | b jump_to_kernel_syscall |
257 | 229 | ||
258 | .org 0xd00 |
230 | .org 0xd00 |
259 | .global exc_trace |
231 | .global exc_trace |
260 | exc_trace: |
232 | exc_trace: |
261 | CONTEXT_STORE |
233 | CONTEXT_STORE |
262 | 234 | ||
263 | lis r12, exc_dispatch@ha |
- | |
264 | addi r12, r12, exc_dispatch@l |
- | |
265 | mtsrr0 r12 |
- | |
266 | - | ||
267 | li r3, 12 |
235 | li r3, 12 |
268 | b jump_to_kernel |
236 | b jump_to_kernel |
269 | 237 | ||
270 | .org 0x4000 |
238 | .org 0x4000 |
271 | jump_to_kernel: |
239 | jump_to_kernel: |
272 | lis r12, iret@ha |
240 | lis r12, iret@ha |
273 | addi r12, r12, iret@l |
241 | addi r12, r12, iret@l |
274 | mtlr r12 |
242 | mtlr r12 |
- | 243 | ||
- | 244 | lis r12, exc_dispatch@ha |
|
- | 245 | addi r12, r12, exc_dispatch@l |
|
- | 246 | mtsrr0 r12 |
|
275 | 247 | ||
276 | mfmsr r12 |
248 | mfmsr r12 |
277 | ori r12, r12, (msr_ir | msr_dr)@l |
249 | ori r12, r12, (msr_ir | msr_dr)@l |
278 | mtsrr1 r12 |
250 | mtsrr1 r12 |
279 | 251 | ||
280 | addis sp, sp, 0x8000 |
252 | addis sp, sp, 0x8000 |
281 | mr r4, sp |
253 | mr r4, sp |
282 | addi r4, r4, 8 |
254 | addi r4, r4, 8 |
283 | 255 | ||
284 | rfi |
256 | rfi |
285 | 257 | ||
286 | jump_to_kernel_syscall: |
258 | jump_to_kernel_syscall: |
287 | lis r12, syscall_handler@ha |
259 | lis r12, syscall_handler@ha |
288 | addi r12, r12, syscall_handler@l |
260 | addi r12, r12, syscall_handler@l |
289 | mtsrr0 r12 |
261 | mtsrr0 r12 |
290 | 262 | ||
291 | lis r12, iret_syscall@ha |
263 | lis r12, iret_syscall@ha |
292 | addi r12, r12, iret_syscall@l |
264 | addi r12, r12, iret_syscall@l |
293 | mtlr r12 |
265 | mtlr r12 |
294 | 266 | ||
295 | mfmsr r12 |
267 | mfmsr r12 |
296 | ori r12, r12, (msr_ir | msr_dr)@l |
268 | ori r12, r12, (msr_ir | msr_dr)@l |
297 | mtsrr1 r12 |
269 | mtsrr1 r12 |
298 | 270 | ||
299 | addis sp, sp, 0x8000 |
271 | addis sp, sp, 0x8000 |
300 | rfi |
272 | rfi |
- | 273 | ||
- | 274 | iret_real: |
|
- | 275 | ||
- | 276 | lwz r0, 8(sp) |
|
- | 277 | lwz r2, 12(sp) |
|
- | 278 | lwz r3, 16(sp) |
|
- | 279 | lwz r4, 20(sp) |
|
- | 280 | lwz r5, 24(sp) |
|
- | 281 | lwz r6, 28(sp) |
|
- | 282 | lwz r7, 32(sp) |
|
- | 283 | lwz r8, 36(sp) |
|
- | 284 | lwz r9, 40(sp) |
|
- | 285 | lwz r10, 44(sp) |
|
- | 286 | lwz r11, 48(sp) |
|
- | 287 | lwz r13, 52(sp) |
|
- | 288 | lwz r14, 56(sp) |
|
- | 289 | lwz r15, 60(sp) |
|
- | 290 | lwz r16, 64(sp) |
|
- | 291 | lwz r17, 68(sp) |
|
- | 292 | lwz r18, 72(sp) |
|
- | 293 | lwz r19, 76(sp) |
|
- | 294 | lwz r20, 80(sp) |
|
- | 295 | lwz r21, 84(sp) |
|
- | 296 | lwz r22, 88(sp) |
|
- | 297 | lwz r23, 92(sp) |
|
- | 298 | lwz r24, 96(sp) |
|
- | 299 | lwz r25, 100(sp) |
|
- | 300 | lwz r26, 104(sp) |
|
- | 301 | lwz r27, 108(sp) |
|
- | 302 | lwz r28, 112(sp) |
|
- | 303 | lwz r29, 116(sp) |
|
- | 304 | lwz r30, 120(sp) |
|
- | 305 | lwz r31, 124(sp) |
|
- | 306 | ||
- | 307 | lwz r12, 128(sp) |
|
- | 308 | mtcr r12 |
|
- | 309 | ||
- | 310 | lwz r12, 132(sp) |
|
- | 311 | mtsrr0 r12 |
|
- | 312 | ||
- | 313 | lwz r12, 136(sp) |
|
- | 314 | mtsrr1 r12 |
|
- | 315 | ||
- | 316 | lwz r12, 140(sp) |
|
- | 317 | mtlr r12 |
|
- | 318 | ||
- | 319 | lwz r12, 144(sp) |
|
- | 320 | mtctr r12 |
|
- | 321 | ||
- | 322 | lwz r12, 148(sp) |
|
- | 323 | mtxer r12 |
|
- | 324 | ||
- | 325 | lwz r12, 152(sp) |
|
- | 326 | lwz sp, 156(sp) |
|
- | 327 | ||
- | 328 | rfi |
|
301 | 329 | ||
302 | 330 | ||
303 |
|
331 |
|
304 | 332 | ||
305 | 333 | ||
306 | 334 |