Rev 1269 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 1269 | Rev 1277 | ||
|---|---|---|---|
| 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 SP in SPRG1 |
36 | # save R12 in SPRG1, backup CR in R12 |
| 37 | # save R12 in SPRG2, backup CR in R12 |
37 | # save SP in SPRG2 |
| 38 | 38 | ||
| 39 | mtsprg1 sp |
- | |
| 40 | mtsprg2 r12 |
39 | mtsprg1 r12 |
| 41 | mfcr r12 |
40 | mfcr r12 |
| - | 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 | mfsprg1 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, 140 |
63 | subi sp, sp, 148 |
| 64 | stw r0, 0(sp) |
64 | stw r0, 0(sp) |
| 65 | stw r2, 4(sp) |
65 | stw r2, 4(sp) |
| 66 | stw r3, 8(sp) |
66 | stw r3, 8(sp) |
| 67 | stw r4, 12(sp) |
67 | stw r4, 12(sp) |
| 68 | stw r5, 16(sp) |
68 | stw r5, 16(sp) |
| 69 | stw r6, 20(sp) |
69 | stw r6, 20(sp) |
| 70 | stw r7, 24(sp) |
70 | stw r7, 24(sp) |
| 71 | stw r8, 28(sp) |
71 | stw r8, 28(sp) |
| 72 | stw r9, 32(sp) |
72 | stw r9, 32(sp) |
| 73 | stw r10, 36(sp) |
73 | stw r10, 36(sp) |
| 74 | stw r11, 40(sp) |
74 | stw r11, 40(sp) |
| 75 | stw r13, 44(sp) |
75 | stw r13, 44(sp) |
| 76 | stw r14, 48(sp) |
76 | stw r14, 48(sp) |
| 77 | stw r15, 52(sp) |
77 | stw r15, 52(sp) |
| 78 | stw r16, 56(sp) |
78 | stw r16, 56(sp) |
| 79 | stw r17, 60(sp) |
79 | stw r17, 60(sp) |
| 80 | stw r18, 64(sp) |
80 | stw r18, 64(sp) |
| 81 | stw r19, 68(sp) |
81 | stw r19, 68(sp) |
| 82 | stw r20, 72(sp) |
82 | stw r20, 72(sp) |
| 83 | stw r21, 76(sp) |
83 | stw r21, 76(sp) |
| 84 | stw r22, 80(sp) |
84 | stw r22, 80(sp) |
| 85 | stw r23, 84(sp) |
85 | stw r23, 84(sp) |
| 86 | stw r24, 88(sp) |
86 | stw r24, 88(sp) |
| 87 | stw r25, 92(sp) |
87 | stw r25, 92(sp) |
| 88 | stw r26, 96(sp) |
88 | stw r26, 96(sp) |
| 89 | stw r27, 100(sp) |
89 | stw r27, 100(sp) |
| 90 | stw r28, 104(sp) |
90 | stw r28, 104(sp) |
| 91 | stw r29, 108(sp) |
91 | stw r29, 108(sp) |
| 92 | stw r30, 112(sp) |
92 | stw r30, 112(sp) |
| 93 | stw r31, 116(sp) |
93 | stw r31, 116(sp) |
| 94 | 94 | ||
| 95 | mfsrr0 r3 |
- | |
| 96 | stw r3, 120(sp) |
95 | stw r12, 120(sp) |
| 97 | 96 | ||
| 98 | mfsrr1 r3 |
97 | mfsrr0 r12 |
| 99 | stw r3, 124(sp) |
98 | stw r12, 124(sp) |
| 100 | 99 | ||
| 101 | mflr r3 |
100 | mfsrr1 r12 |
| 102 | stw r3, 128(sp) |
101 | stw r12, 128(sp) |
| 103 | 102 | ||
| - | 103 | mflr r12 |
|
| 104 | stw r12, 132(sp) |
104 | stw r12, 132(sp) |
| 105 | 105 | ||
| 106 | mfctr r3 |
106 | mfctr r12 |
| 107 | stw r3, 136(sp) |
107 | stw r12, 136(sp) |
| 108 | 108 | ||
| 109 | mfxer r3 |
109 | mfxer r12 |
| 110 | stw r3, 140(sp) |
110 | stw r12, 140(sp) |
| - | 111 | ||
| - | 112 | mfsprg1 r12 |
|
| - | 113 | stw r12, 144(sp) |
|
| - | 114 | ||
| - | 115 | mfsprg2 r12 |
|
| - | 116 | stw r12, 148(sp) |
|
| 111 | .endm |
117 | .endm |
| 112 | 118 | ||
| - | 119 | .org 0x060 |
|
| - | 120 | jump_to_kernel: |
|
| - | 121 | lis r12, iret@ha |
|
| - | 122 | addi r12, r12, iret@l |
|
| - | 123 | mtlr r12 |
|
| - | 124 | ||
| - | 125 | mfmsr r12 |
|
| - | 126 | ori r12, r12, (msr_ir | msr_dr)@l |
|
| - | 127 | mtsrr1 r12 |
|
| - | 128 | ||
| - | 129 | addis sp, sp, 0x8000 |
|
| - | 130 | mr r4, sp |
|
| - | 131 | rfi |
|
| - | 132 | ||
| - | 133 | jump_to_kernel_syscall: |
|
| - | 134 | lis r12, syscall_handler@ha |
|
| - | 135 | addi r12, r12, syscall_handler@l |
|
| - | 136 | mtsrr0 r12 |
|
| - | 137 | ||
| - | 138 | lis r12, iret_syscall@ha |
|
| - | 139 | addi r12, r12, iret_syscall@l |
|
| - | 140 | mtlr r12 |
|
| - | 141 | ||
| - | 142 | mfmsr r12 |
|
| - | 143 | ori r12, r12, (msr_ir | msr_dr)@l |
|
| - | 144 | mtsrr1 r12 |
|
| - | 145 | ||
| - | 146 | addis sp, sp, 0x8000 |
|
| - | 147 | rfi |
|
| - | 148 | ||
| 113 | .org 0x100 |
149 | .org 0x100 |
| 114 | .global exc_system_reset |
150 | .global exc_system_reset |
| 115 | exc_system_reset: |
151 | exc_system_reset: |
| 116 | b exc_system_reset |
152 | b exc_system_reset |
| 117 | 153 | ||
| 118 | .org 0x200 |
154 | .org 0x200 |
| 119 | .global exc_machine_check |
155 | .global exc_machine_check |
| 120 | exc_machine_check: |
156 | exc_machine_check: |
| 121 | b exc_machine_check |
157 | b exc_machine_check |
| 122 | 158 | ||
| 123 | .org 0x300 |
159 | .org 0x300 |
| 124 | .global exc_data_storage |
160 | .global exc_data_storage |
| 125 | exc_data_storage: |
161 | exc_data_storage: |
| 126 | CONTEXT_STORE |
162 | CONTEXT_STORE |
| 127 | 163 | ||
| 128 | lis r3, pht_refill@ha |
164 | lis r12, pht_refill@ha |
| 129 | addi r3, r3, pht_refill@l |
165 | addi r12, r12, pht_refill@l |
| 130 | mtsrr0 r3 |
166 | mtsrr0 r12 |
| 131 | - | ||
| 132 | mfmsr r3 |
- | |
| 133 | ori r3, r3, (msr_ir | msr_dr)@l |
- | |
| 134 | mtsrr1 r3 |
- | |
| 135 | - | ||
| 136 | lis r3, iret@ha |
- | |
| 137 | addi r3, r3, iret@l |
- | |
| 138 | mtlr r3 |
- | |
| 139 | 167 | ||
| 140 | addis sp, sp, 0x8000 |
- | |
| 141 | li r3, 1 |
168 | li r3, 1 |
| 142 | mr r4, sp |
169 | b jump_to_kernel |
| 143 | rfi |
- | |
| 144 | 170 | ||
| 145 | .org 0x400 |
171 | .org 0x400 |
| 146 | .global exc_instruction_storage |
172 | .global exc_instruction_storage |
| 147 | exc_instruction_storage: |
173 | exc_instruction_storage: |
| 148 | CONTEXT_STORE |
174 | CONTEXT_STORE |
| 149 | 175 | ||
| 150 | lis r3, pht_refill@ha |
176 | lis r12, pht_refill@ha |
| 151 | addi r3, r3, pht_refill@l |
177 | addi r12, r12, pht_refill@l |
| 152 | mtsrr0 r3 |
178 | mtsrr0 r12 |
| 153 | - | ||
| 154 | mfmsr r3 |
- | |
| 155 | ori r3, r3, (msr_ir | msr_dr)@l |
- | |
| 156 | mtsrr1 r3 |
- | |
| 157 | - | ||
| 158 | lis r3, iret@ha |
- | |
| 159 | addi r3, r3, iret@l |
- | |
| 160 | mtlr r3 |
- | |
| 161 | 179 | ||
| 162 | addis sp, sp, 0x8000 |
- | |
| 163 | li r3, 0 |
180 | li r3, 0 |
| 164 | mr r4, sp |
181 | b jump_to_kernel |
| 165 | rfi |
- | |
| 166 | 182 | ||
| 167 | .org 0x500 |
183 | .org 0x500 |
| 168 | .global exc_external |
184 | .global exc_external |
| 169 | exc_external: |
185 | exc_external: |
| 170 | b exc_external |
186 | b exc_external |
| 171 | 187 | ||
| 172 | .org 0x600 |
188 | .org 0x600 |
| 173 | .global exc_alignment |
189 | .global exc_alignment |
| 174 | exc_alignment: |
190 | exc_alignment: |
| 175 | b exc_alignment |
191 | b exc_alignment |
| 176 | 192 | ||
| 177 | .org 0x700 |
193 | .org 0x700 |
| 178 | .global exc_program |
194 | .global exc_program |
| 179 | exc_program: |
195 | exc_program: |
| 180 | b exc_program |
196 | b exc_program |
| 181 | 197 | ||
| 182 | .org 0x800 |
198 | .org 0x800 |
| 183 | .global exc_fp_unavailable |
199 | .global exc_fp_unavailable |
| 184 | exc_fp_unavailable: |
200 | exc_fp_unavailable: |
| 185 | b exc_fp_unavailable |
201 | b exc_fp_unavailable |
| 186 | 202 | ||
| 187 | .org 0x900 |
203 | .org 0x900 |
| 188 | .global exc_decrementer |
204 | .global exc_decrementer |
| 189 | exc_decrementer: |
205 | exc_decrementer: |
| 190 | CONTEXT_STORE |
206 | CONTEXT_STORE |
| 191 | 207 | ||
| 192 | lis r3, exc_dispatch@ha |
208 | lis r12, exc_dispatch@ha |
| 193 | addi r3, r3, exc_dispatch@l |
209 | addi r12, r12, exc_dispatch@l |
| 194 | mtsrr0 r3 |
210 | mtsrr0 r12 |
| 195 | - | ||
| 196 | mfmsr r3 |
- | |
| 197 | ori r3, r3, (msr_ir | msr_dr)@l |
- | |
| 198 | mtsrr1 r3 |
- | |
| 199 | - | ||
| 200 | lis r3, iret@ha |
- | |
| 201 | addi r3, r3, iret@l |
- | |
| 202 | mtlr r3 |
- | |
| 203 | 211 | ||
| 204 | addis sp, sp, 0x8000 |
- | |
| 205 | li r3, 10 |
212 | li r3, 10 |
| 206 | mr r4, sp |
213 | b jump_to_kernel |
| 207 | rfi |
- | |
| 208 | 214 | ||
| 209 | .org 0xa00 |
215 | .org 0xa00 |
| 210 | .global exc_reserved0 |
216 | .global exc_reserved0 |
| 211 | exc_reserved0: |
217 | exc_reserved0: |
| 212 | b exc_reserved0 |
218 | b exc_reserved0 |
| 213 | 219 | ||
| 214 | .org 0xb00 |
220 | .org 0xb00 |
| 215 | .global exc_reserved1 |
221 | .global exc_reserved1 |
| 216 | exc_reserved1: |
222 | exc_reserved1: |
| 217 | b exc_reserved1 |
223 | b exc_reserved1 |
| 218 | 224 | ||
| 219 | .org 0xc00 |
225 | .org 0xc00 |
| 220 | .global exc_syscall |
226 | .global exc_syscall |
| 221 | exc_syscall: |
227 | exc_syscall: |
| - | 228 | CONTEXT_STORE |
|
| - | 229 | ||
| 222 | b exc_syscall |
230 | b jump_to_kernel_syscall |
| 223 | 231 | ||
| 224 | .org 0xd00 |
232 | .org 0xd00 |
| 225 | .global exc_trace |
233 | .global exc_trace |
| 226 | exc_trace: |
234 | exc_trace: |
| 227 | b exc_trace |
235 | b exc_trace |
| 228 | 236 | ||