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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 0x060 |
119 | .org 0x060 |
120 | jump_to_kernel: |
120 | jump_to_kernel: |
121 | lis r12, iret@ha |
121 | lis r12, iret@ha |
122 | addi r12, r12, iret@l |
122 | addi r12, r12, iret@l |
123 | mtlr r12 |
123 | mtlr r12 |
124 | 124 | ||
125 | mfmsr r12 |
125 | mfmsr r12 |
126 | ori r12, r12, (msr_ir | msr_dr)@l |
126 | ori r12, r12, (msr_ir | msr_dr)@l |
127 | mtsrr1 r12 |
127 | mtsrr1 r12 |
128 | 128 | ||
129 | addis sp, sp, 0x8000 |
129 | addis sp, sp, 0x8000 |
130 | mr r4, sp |
130 | mr r4, sp |
131 | addi r4, r4, 8 |
131 | addi r4, r4, 8 |
132 | 132 | ||
133 | rfi |
133 | rfi |
134 | 134 | ||
135 | jump_to_kernel_syscall: |
135 | jump_to_kernel_syscall: |
136 | lis r12, syscall_handler@ha |
136 | lis r12, syscall_handler@ha |
137 | addi r12, r12, syscall_handler@l |
137 | addi r12, r12, syscall_handler@l |
138 | mtsrr0 r12 |
138 | mtsrr0 r12 |
139 | 139 | ||
140 | lis r12, iret_syscall@ha |
140 | lis r12, iret_syscall@ha |
141 | addi r12, r12, iret_syscall@l |
141 | addi r12, r12, iret_syscall@l |
142 | mtlr r12 |
142 | mtlr r12 |
143 | 143 | ||
144 | mfmsr r12 |
144 | mfmsr r12 |
145 | ori r12, r12, (msr_ir | msr_dr)@l |
145 | ori r12, r12, (msr_ir | msr_dr)@l |
146 | mtsrr1 r12 |
146 | mtsrr1 r12 |
147 | 147 | ||
148 | addis sp, sp, 0x8000 |
148 | addis sp, sp, 0x8000 |
149 | rfi |
149 | rfi |
150 | 150 | ||
151 | .org 0x100 |
151 | .org 0x100 |
152 | .global exc_system_reset |
152 | .global exc_system_reset |
153 | exc_system_reset: |
153 | exc_system_reset: |
- | 154 | CONTEXT_STORE |
|
- | 155 | ||
- | 156 | lis r12, exc_dispatch@ha |
|
- | 157 | addi r12, r12, exc_dispatch@l |
|
- | 158 | mtsrr0 r12 |
|
- | 159 | ||
- | 160 | li r3, 0 |
|
154 | b exc_system_reset |
161 | b jump_to_kernel |
155 | 162 | ||
156 | .org 0x200 |
163 | .org 0x200 |
157 | .global exc_machine_check |
164 | .global exc_machine_check |
158 | exc_machine_check: |
165 | exc_machine_check: |
- | 166 | CONTEXT_STORE |
|
- | 167 | ||
- | 168 | lis r12, exc_dispatch@ha |
|
- | 169 | addi r12, r12, exc_dispatch@l |
|
- | 170 | mtsrr0 r12 |
|
- | 171 | ||
- | 172 | li r3, 1 |
|
159 | b exc_machine_check |
173 | b jump_to_kernel |
160 | 174 | ||
161 | .org 0x300 |
175 | .org 0x300 |
162 | .global exc_data_storage |
176 | .global exc_data_storage |
163 | exc_data_storage: |
177 | exc_data_storage: |
164 | CONTEXT_STORE |
178 | CONTEXT_STORE |
165 | 179 | ||
166 | lis r12, pht_refill@ha |
180 | lis r12, exc_dispatch@ha |
167 | addi r12, r12, pht_refill@l |
181 | addi r12, r12, exc_dispatch@l |
168 | mtsrr0 r12 |
182 | mtsrr0 r12 |
169 | 183 | ||
170 | li r3, 1 |
184 | li r3, 2 |
171 | b jump_to_kernel |
185 | b jump_to_kernel |
172 | 186 | ||
173 | .org 0x400 |
187 | .org 0x400 |
174 | .global exc_instruction_storage |
188 | .global exc_instruction_storage |
175 | exc_instruction_storage: |
189 | exc_instruction_storage: |
176 | CONTEXT_STORE |
190 | CONTEXT_STORE |
177 | 191 | ||
178 | lis r12, pht_refill@ha |
192 | lis r12, exc_dispatch@ha |
179 | addi r12, r12, pht_refill@l |
193 | addi r12, r12, exc_dispatch@l |
180 | mtsrr0 r12 |
194 | mtsrr0 r12 |
181 | 195 | ||
182 | li r3, 0 |
196 | li r3, 3 |
183 | b jump_to_kernel |
197 | b jump_to_kernel |
184 | 198 | ||
185 | .org 0x500 |
199 | .org 0x500 |
186 | .global exc_external |
200 | .global exc_external |
187 | exc_external: |
201 | exc_external: |
188 | CONTEXT_STORE |
202 | CONTEXT_STORE |
189 | 203 | ||
190 | lis r12, extint_handler@ha |
204 | lis r12, exc_dispatch@ha |
191 | addi r12, r12, extint_handler@l |
205 | addi r12, r12, exc_dispatch@l |
192 | mtsrr0 r12 |
206 | mtsrr0 r12 |
193 | 207 | ||
194 | li r3, 0 |
208 | li r3, 4 |
195 | b jump_to_kernel |
209 | b jump_to_kernel |
196 | 210 | ||
197 | .org 0x600 |
211 | .org 0x600 |
198 | .global exc_alignment |
212 | .global exc_alignment |
199 | exc_alignment: |
213 | exc_alignment: |
- | 214 | CONTEXT_STORE |
|
- | 215 | ||
- | 216 | lis r12, exc_dispatch@ha |
|
- | 217 | addi r12, r12, exc_dispatch@l |
|
- | 218 | mtsrr0 r12 |
|
- | 219 | ||
- | 220 | li r3, 5 |
|
200 | b exc_alignment |
221 | b jump_to_kernel |
201 | 222 | ||
202 | .org 0x700 |
223 | .org 0x700 |
203 | .global exc_program |
224 | .global exc_program |
204 | exc_program: |
225 | exc_program: |
- | 226 | CONTEXT_STORE |
|
- | 227 | ||
- | 228 | lis r12, exc_dispatch@ha |
|
- | 229 | addi r12, r12, exc_dispatch@l |
|
- | 230 | mtsrr0 r12 |
|
- | 231 | ||
- | 232 | li r3, 6 |
|
205 | b exc_program |
233 | b jump_to_kernel |
206 | 234 | ||
207 | .org 0x800 |
235 | .org 0x800 |
208 | .global exc_fp_unavailable |
236 | .global exc_fp_unavailable |
209 | exc_fp_unavailable: |
237 | exc_fp_unavailable: |
- | 238 | CONTEXT_STORE |
|
- | 239 | ||
- | 240 | lis r12, exc_dispatch@ha |
|
- | 241 | addi r12, r12, exc_dispatch@l |
|
- | 242 | mtsrr0 r12 |
|
- | 243 | ||
- | 244 | li r3, 7 |
|
210 | b exc_fp_unavailable |
245 | b jump_to_kernel |
211 | 246 | ||
212 | .org 0x900 |
247 | .org 0x900 |
213 | .global exc_decrementer |
248 | .global exc_decrementer |
214 | exc_decrementer: |
249 | exc_decrementer: |
215 | CONTEXT_STORE |
250 | CONTEXT_STORE |
216 | 251 | ||
217 | lis r12, exc_dispatch@ha |
252 | lis r12, exc_dispatch@ha |
218 | addi r12, r12, exc_dispatch@l |
253 | addi r12, r12, exc_dispatch@l |
219 | mtsrr0 r12 |
254 | mtsrr0 r12 |
220 | 255 | ||
221 | li r3, 10 |
256 | li r3, 8 |
222 | b jump_to_kernel |
257 | b jump_to_kernel |
223 | 258 | ||
224 | .org 0xa00 |
259 | .org 0xa00 |
225 | .global exc_reserved0 |
260 | .global exc_reserved0 |
226 | exc_reserved0: |
261 | exc_reserved0: |
- | 262 | CONTEXT_STORE |
|
- | 263 | ||
- | 264 | lis r12, exc_dispatch@ha |
|
- | 265 | addi r12, r12, exc_dispatch@l |
|
- | 266 | mtsrr0 r12 |
|
- | 267 | ||
- | 268 | li r3, 9 |
|
227 | b exc_reserved0 |
269 | b jump_to_kernel |
228 | 270 | ||
229 | .org 0xb00 |
271 | .org 0xb00 |
230 | .global exc_reserved1 |
272 | .global exc_reserved1 |
231 | exc_reserved1: |
273 | exc_reserved1: |
- | 274 | CONTEXT_STORE |
|
- | 275 | ||
- | 276 | lis r12, exc_dispatch@ha |
|
- | 277 | addi r12, r12, exc_dispatch@l |
|
- | 278 | mtsrr0 r12 |
|
- | 279 | ||
- | 280 | li r3, 10 |
|
232 | b exc_reserved1 |
281 | b jump_to_kernel |
233 | 282 | ||
234 | .org 0xc00 |
283 | .org 0xc00 |
235 | .global exc_syscall |
284 | .global exc_syscall |
236 | exc_syscall: |
285 | exc_syscall: |
237 | CONTEXT_STORE |
286 | CONTEXT_STORE |
238 | 287 | ||
239 | b jump_to_kernel_syscall |
288 | b jump_to_kernel_syscall |
240 | 289 | ||
241 | .org 0xd00 |
290 | .org 0xd00 |
242 | .global exc_trace |
291 | .global exc_trace |
243 | exc_trace: |
292 | exc_trace: |
- | 293 | CONTEXT_STORE |
|
- | 294 | ||
- | 295 | lis r12, exc_dispatch@ha |
|
- | 296 | addi r12, r12, exc_dispatch@l |
|
- | 297 | mtsrr0 r12 |
|
- | 298 | ||
- | 299 | li r3, 12 |
|
244 | b exc_trace |
300 | b jump_to_kernel |
245 | 301 |