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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, 164 |
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 | mfdar r12 |
113 | stw r12, 152(sp) |
113 | stw r12, 152(sp) |
114 | 114 | ||
115 | mfsprg2 r12 |
115 | mfsprg1 r12 |
116 | stw r12, 156(sp) |
116 | stw r12, 156(sp) |
- | 117 | ||
- | 118 | mfsprg2 r12 |
|
- | 119 | stw r12, 160(sp) |
|
117 | .endm |
120 | .endm |
118 | 121 | ||
119 | .org 0x100 |
122 | .org 0x100 |
120 | .global exc_system_reset |
123 | .global exc_system_reset |
121 | exc_system_reset: |
124 | exc_system_reset: |
122 | CONTEXT_STORE |
125 | CONTEXT_STORE |
123 | 126 | ||
124 | li r3, 0 |
127 | li r3, 0 |
125 | b jump_to_kernel |
128 | b jump_to_kernel |
126 | 129 | ||
127 | .org 0x200 |
130 | .org 0x200 |
128 | .global exc_machine_check |
131 | .global exc_machine_check |
129 | exc_machine_check: |
132 | exc_machine_check: |
130 | CONTEXT_STORE |
133 | CONTEXT_STORE |
131 | 134 | ||
132 | li r3, 1 |
135 | li r3, 1 |
133 | b jump_to_kernel |
136 | b jump_to_kernel |
134 | 137 | ||
135 | .org 0x300 |
138 | .org 0x300 |
136 | .global exc_data_storage |
139 | .global exc_data_storage |
137 | exc_data_storage: |
140 | exc_data_storage: |
138 | CONTEXT_STORE |
141 | CONTEXT_STORE |
139 | 142 | ||
140 | li r3, 2 |
- | |
141 | mr r4, sp |
- | |
142 | addi r4, r4, 8 |
- | |
143 | bl pht_real_refill |
- | |
144 | - | ||
145 | cmpwi r3, 0 |
- | |
146 | bne iret_real |
- | |
147 | - | ||
148 | li r3, 2 |
- | |
149 | b jump_to_kernel |
143 | b data_storage |
150 | 144 | ||
151 | .org 0x400 |
145 | .org 0x400 |
152 | .global exc_instruction_storage |
146 | .global exc_instruction_storage |
153 | exc_instruction_storage: |
147 | exc_instruction_storage: |
154 | CONTEXT_STORE |
148 | CONTEXT_STORE |
155 | 149 | ||
156 | li r3, 3 |
- | |
157 | mr r4, sp |
- | |
158 | addi r4, r4, 8 |
- | |
159 | bl pht_real_refill |
- | |
160 | - | ||
161 | cmpwi r3, 0 |
- | |
162 | bne iret_real |
- | |
163 | - | ||
164 | li r3, 3 |
- | |
165 | b jump_to_kernel |
150 | b instruction_storage |
166 | 151 | ||
167 | .org 0x500 |
152 | .org 0x500 |
168 | .global exc_external |
153 | .global exc_external |
169 | exc_external: |
154 | exc_external: |
170 | CONTEXT_STORE |
155 | CONTEXT_STORE |
171 | 156 | ||
172 | li r3, 4 |
157 | li r3, 4 |
173 | b jump_to_kernel |
158 | b jump_to_kernel |
174 | 159 | ||
175 | .org 0x600 |
160 | .org 0x600 |
176 | .global exc_alignment |
161 | .global exc_alignment |
177 | exc_alignment: |
162 | exc_alignment: |
178 | CONTEXT_STORE |
163 | CONTEXT_STORE |
179 | 164 | ||
180 | li r3, 5 |
165 | li r3, 5 |
181 | b jump_to_kernel |
166 | b jump_to_kernel |
182 | 167 | ||
183 | .org 0x700 |
168 | .org 0x700 |
184 | .global exc_program |
169 | .global exc_program |
185 | exc_program: |
170 | exc_program: |
186 | CONTEXT_STORE |
171 | CONTEXT_STORE |
187 | 172 | ||
188 | li r3, 6 |
173 | li r3, 6 |
189 | b jump_to_kernel |
174 | b jump_to_kernel |
190 | 175 | ||
191 | .org 0x800 |
176 | .org 0x800 |
192 | .global exc_fp_unavailable |
177 | .global exc_fp_unavailable |
193 | exc_fp_unavailable: |
178 | exc_fp_unavailable: |
194 | CONTEXT_STORE |
179 | CONTEXT_STORE |
195 | 180 | ||
196 | li r3, 7 |
181 | li r3, 7 |
197 | b jump_to_kernel |
182 | b jump_to_kernel |
198 | 183 | ||
199 | .org 0x900 |
184 | .org 0x900 |
200 | .global exc_decrementer |
185 | .global exc_decrementer |
201 | exc_decrementer: |
186 | exc_decrementer: |
202 | CONTEXT_STORE |
187 | CONTEXT_STORE |
203 | 188 | ||
204 | li r3, 8 |
189 | li r3, 8 |
205 | b jump_to_kernel |
190 | b jump_to_kernel |
206 | 191 | ||
207 | .org 0xa00 |
192 | .org 0xa00 |
208 | .global exc_reserved0 |
193 | .global exc_reserved0 |
209 | exc_reserved0: |
194 | exc_reserved0: |
210 | CONTEXT_STORE |
195 | CONTEXT_STORE |
211 | 196 | ||
212 | li r3, 9 |
197 | li r3, 9 |
213 | b jump_to_kernel |
198 | b jump_to_kernel |
214 | 199 | ||
215 | .org 0xb00 |
200 | .org 0xb00 |
216 | .global exc_reserved1 |
201 | .global exc_reserved1 |
217 | exc_reserved1: |
202 | exc_reserved1: |
218 | CONTEXT_STORE |
203 | CONTEXT_STORE |
219 | 204 | ||
220 | li r3, 10 |
205 | li r3, 10 |
221 | b jump_to_kernel |
206 | b jump_to_kernel |
222 | 207 | ||
223 | .org 0xc00 |
208 | .org 0xc00 |
224 | .global exc_syscall |
209 | .global exc_syscall |
225 | exc_syscall: |
210 | exc_syscall: |
226 | CONTEXT_STORE |
211 | CONTEXT_STORE |
227 | 212 | ||
228 | b jump_to_kernel_syscall |
213 | b jump_to_kernel_syscall |
229 | 214 | ||
230 | .org 0xd00 |
215 | .org 0xd00 |
231 | .global exc_trace |
216 | .global exc_trace |
232 | exc_trace: |
217 | exc_trace: |
233 | CONTEXT_STORE |
218 | CONTEXT_STORE |
234 | 219 | ||
235 | li r3, 12 |
220 | li r3, 12 |
236 | b jump_to_kernel |
221 | b jump_to_kernel |
237 | 222 | ||
- | 223 | .org 0x1000 |
|
- | 224 | .global exc_itlb_miss |
|
- | 225 | exc_itlb_miss: |
|
- | 226 | CONTEXT_STORE |
|
- | 227 | ||
- | 228 | b tlb_miss |
|
- | 229 | ||
- | 230 | .org 0x1100 |
|
- | 231 | .global exc_dtlb_miss_load |
|
- | 232 | exc_dtlb_miss_load: |
|
- | 233 | CONTEXT_STORE |
|
- | 234 | ||
- | 235 | b tlb_miss |
|
- | 236 | ||
- | 237 | .org 0x1200 |
|
- | 238 | .global exc_dtlb_miss_store |
|
- | 239 | exc_dtlb_miss_store: |
|
- | 240 | CONTEXT_STORE |
|
- | 241 | ||
- | 242 | b tlb_miss |
|
- | 243 | ||
238 | .org 0x4000 |
244 | .org 0x4000 |
- | 245 | data_storage: |
|
- | 246 | li r3, 2 |
|
- | 247 | mr r4, sp |
|
- | 248 | addi r4, r4, 8 |
|
- | 249 | bl pht_refill_real |
|
- | 250 | ||
- | 251 | cmpwi r3, 0 |
|
- | 252 | bne iret_real |
|
- | 253 | ||
- | 254 | li r3, 2 |
|
- | 255 | b jump_to_kernel |
|
- | 256 | ||
- | 257 | instruction_storage: |
|
- | 258 | li r3, 3 |
|
- | 259 | mr r4, sp |
|
- | 260 | addi r4, r4, 8 |
|
- | 261 | bl pht_refill_real |
|
- | 262 | ||
- | 263 | cmpwi r3, 0 |
|
- | 264 | bne iret_real |
|
- | 265 | ||
- | 266 | li r3, 3 |
|
- | 267 | b jump_to_kernel |
|
- | 268 | ||
- | 269 | tlb_miss: |
|
- | 270 | li r3, 16 |
|
- | 271 | mfspr r4, tlbmiss |
|
- | 272 | mfspr r5, ptehi |
|
- | 273 | mfspr r6, ptelo |
|
- | 274 | mr r7, sp |
|
- | 275 | addi r7, r7, 20 |
|
- | 276 | ||
- | 277 | bl tlb_refill_real |
|
- | 278 | b iret_real |
|
- | 279 | ||
239 | jump_to_kernel: |
280 | jump_to_kernel: |
240 | lis r12, iret@ha |
281 | lis r12, iret@ha |
241 | addi r12, r12, iret@l |
282 | addi r12, r12, iret@l |
242 | mtlr r12 |
283 | mtlr r12 |
243 | 284 | ||
244 | lis r12, exc_dispatch@ha |
285 | lis r12, exc_dispatch@ha |
245 | addi r12, r12, exc_dispatch@l |
286 | addi r12, r12, exc_dispatch@l |
246 | mtsrr0 r12 |
287 | mtsrr0 r12 |
247 | 288 | ||
248 | mfmsr r12 |
289 | mfmsr r12 |
249 | ori r12, r12, (msr_ir | msr_dr)@l |
290 | ori r12, r12, (msr_ir | msr_dr)@l |
250 | mtsrr1 r12 |
291 | mtsrr1 r12 |
251 | 292 | ||
252 | addis sp, sp, 0x8000 |
293 | addis sp, sp, 0x8000 |
253 | mr r4, sp |
294 | mr r4, sp |
254 | addi r4, r4, 8 |
295 | addi r4, r4, 8 |
255 | 296 | ||
256 | rfi |
297 | rfi |
257 | 298 | ||
258 | jump_to_kernel_syscall: |
299 | jump_to_kernel_syscall: |
259 | lis r12, syscall_handler@ha |
300 | lis r12, syscall_handler@ha |
260 | addi r12, r12, syscall_handler@l |
301 | addi r12, r12, syscall_handler@l |
261 | mtsrr0 r12 |
302 | mtsrr0 r12 |
262 | 303 | ||
263 | lis r12, iret_syscall@ha |
304 | lis r12, iret_syscall@ha |
264 | addi r12, r12, iret_syscall@l |
305 | addi r12, r12, iret_syscall@l |
265 | mtlr r12 |
306 | mtlr r12 |
266 | 307 | ||
267 | mfmsr r12 |
308 | mfmsr r12 |
268 | ori r12, r12, (msr_ir | msr_dr)@l |
309 | ori r12, r12, (msr_ir | msr_dr)@l |
269 | mtsrr1 r12 |
310 | mtsrr1 r12 |
270 | 311 | ||
271 | addis sp, sp, 0x8000 |
312 | addis sp, sp, 0x8000 |
272 | rfi |
313 | rfi |
273 | 314 | ||
274 | iret_real: |
315 | iret_real: |
275 | - | ||
276 | lwz r0, 8(sp) |
316 | lwz r0, 8(sp) |
277 | lwz r2, 12(sp) |
317 | lwz r2, 12(sp) |
278 | lwz r3, 16(sp) |
318 | lwz r3, 16(sp) |
279 | lwz r4, 20(sp) |
319 | lwz r4, 20(sp) |
280 | lwz r5, 24(sp) |
320 | lwz r5, 24(sp) |
281 | lwz r6, 28(sp) |
321 | lwz r6, 28(sp) |
282 | lwz r7, 32(sp) |
322 | lwz r7, 32(sp) |
283 | lwz r8, 36(sp) |
323 | lwz r8, 36(sp) |
284 | lwz r9, 40(sp) |
324 | lwz r9, 40(sp) |
285 | lwz r10, 44(sp) |
325 | lwz r10, 44(sp) |
286 | lwz r11, 48(sp) |
326 | lwz r11, 48(sp) |
287 | lwz r13, 52(sp) |
327 | lwz r13, 52(sp) |
288 | lwz r14, 56(sp) |
328 | lwz r14, 56(sp) |
289 | lwz r15, 60(sp) |
329 | lwz r15, 60(sp) |
290 | lwz r16, 64(sp) |
330 | lwz r16, 64(sp) |
291 | lwz r17, 68(sp) |
331 | lwz r17, 68(sp) |
292 | lwz r18, 72(sp) |
332 | lwz r18, 72(sp) |
293 | lwz r19, 76(sp) |
333 | lwz r19, 76(sp) |
294 | lwz r20, 80(sp) |
334 | lwz r20, 80(sp) |
295 | lwz r21, 84(sp) |
335 | lwz r21, 84(sp) |
296 | lwz r22, 88(sp) |
336 | lwz r22, 88(sp) |
297 | lwz r23, 92(sp) |
337 | lwz r23, 92(sp) |
298 | lwz r24, 96(sp) |
338 | lwz r24, 96(sp) |
299 | lwz r25, 100(sp) |
339 | lwz r25, 100(sp) |
300 | lwz r26, 104(sp) |
340 | lwz r26, 104(sp) |
301 | lwz r27, 108(sp) |
341 | lwz r27, 108(sp) |
302 | lwz r28, 112(sp) |
342 | lwz r28, 112(sp) |
303 | lwz r29, 116(sp) |
343 | lwz r29, 116(sp) |
304 | lwz r30, 120(sp) |
344 | lwz r30, 120(sp) |
305 | lwz r31, 124(sp) |
345 | lwz r31, 124(sp) |
306 | 346 | ||
307 | lwz r12, 128(sp) |
347 | lwz r12, 128(sp) |
308 | mtcr r12 |
348 | mtcr r12 |
309 | 349 | ||
310 | lwz r12, 132(sp) |
350 | lwz r12, 132(sp) |
311 | mtsrr0 r12 |
351 | mtsrr0 r12 |
312 | 352 | ||
313 | lwz r12, 136(sp) |
353 | lwz r12, 136(sp) |
314 | mtsrr1 r12 |
354 | mtsrr1 r12 |
315 | 355 | ||
316 | lwz r12, 140(sp) |
356 | lwz r12, 140(sp) |
317 | mtlr r12 |
357 | mtlr r12 |
318 | 358 | ||
319 | lwz r12, 144(sp) |
359 | lwz r12, 144(sp) |
320 | mtctr r12 |
360 | mtctr r12 |
321 | 361 | ||
322 | lwz r12, 148(sp) |
362 | lwz r12, 148(sp) |
323 | mtxer r12 |
363 | mtxer r12 |
324 | 364 | ||
325 | lwz r12, 152(sp) |
365 | lwz r12, 156(sp) |
326 | lwz sp, 156(sp) |
366 | lwz sp, 160(sp) |
327 | 367 | ||
328 | rfi |
368 | rfi |
329 | 369 | ||
330 | 370 | ||
331 |
|
371 |
|
332 | 372 | ||
333 | 373 | ||
334 | 374 |