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| Rev 1160 | Rev 1398 | ||
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| 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 |
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| - | 35 | ||
| - | 36 | # save R12 in SPRG1, backup CR in R12 |
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| - | 37 | # save SP in SPRG2 |
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| - | 38 | ||
| - | 39 | mtsprg1 r12 |
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| - | 40 | mfcr r12 |
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| - | 41 | mtsprg2 sp |
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| - | 42 | ||
| - | 43 | # check whether SP is in kernel |
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| - | 44 | ||
| - | 45 | andis. sp, sp, 0x8000 |
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| - | 46 | bne 1f |
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| - | 47 | ||
| - | 48 | # stack is in user-space |
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| - | 49 | ||
| - | 50 | mfsprg0 sp |
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| - | 51 | ||
| - | 52 | b 2f |
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| - | 53 | ||
| - | 54 | 1: |
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| - | 55 | ||
| - | 56 | # stack is in kernel |
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| - | 57 | ||
| - | 58 | mfsprg2 sp |
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| - | 59 | subis sp, sp, 0x8000 |
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| - | 60 | ||
| - | 61 | 2: |
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| - | 62 | ||
| - | 63 | subi sp, sp, 160 |
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| - | 64 | stw r0, 8(sp) |
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| - | 65 | stw r2, 12(sp) |
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| - | 66 | stw r3, 16(sp) |
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| - | 67 | stw r4, 20(sp) |
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| - | 68 | stw r5, 24(sp) |
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| - | 69 | stw r6, 28(sp) |
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| - | 70 | stw r7, 32(sp) |
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| - | 71 | stw r8, 36(sp) |
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| - | 72 | stw r9, 40(sp) |
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| - | 73 | stw r10, 44(sp) |
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| - | 74 | stw r11, 48(sp) |
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| - | 75 | stw r13, 52(sp) |
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| - | 76 | stw r14, 56(sp) |
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| - | 77 | stw r15, 60(sp) |
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| - | 78 | stw r16, 64(sp) |
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| - | 79 | stw r17, 68(sp) |
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| - | 80 | stw r18, 72(sp) |
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| - | 81 | stw r19, 76(sp) |
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| - | 82 | stw r20, 80(sp) |
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| - | 83 | stw r21, 84(sp) |
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| - | 84 | stw r22, 88(sp) |
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| - | 85 | stw r23, 92(sp) |
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| - | 86 | stw r24, 96(sp) |
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| - | 87 | stw r25, 100(sp) |
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| - | 88 | stw r26, 104(sp) |
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| - | 89 | stw r27, 108(sp) |
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| - | 90 | stw r28, 112(sp) |
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| - | 91 | stw r29, 116(sp) |
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| - | 92 | stw r30, 120(sp) |
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| - | 93 | stw r31, 124(sp) |
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| - | 94 | ||
| - | 95 | stw r12, 128(sp) |
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| - | 96 | ||
| - | 97 | mfsrr0 r12 |
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| - | 98 | stw r12, 132(sp) |
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| - | 99 | ||
| - | 100 | mfsrr1 r12 |
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| - | 101 | stw r12, 136(sp) |
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| - | 102 | ||
| - | 103 | mflr r12 |
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| - | 104 | stw r12, 140(sp) |
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| - | 105 | ||
| - | 106 | mfctr r12 |
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| - | 107 | stw r12, 144(sp) |
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| - | 108 | ||
| - | 109 | mfxer r12 |
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| - | 110 | stw r12, 148(sp) |
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| - | 111 | ||
| - | 112 | mfsprg1 r12 |
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| - | 113 | stw r12, 152(sp) |
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| - | 114 | ||
| - | 115 | mfsprg2 r12 |
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| - | 116 | stw r12, 156(sp) |
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| - | 117 | .endm |
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| - | 118 | ||
| - | 119 | .org 0x060 |
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| - | 120 | jump_to_kernel: |
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| - | 121 | lis r12, iret@ha |
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| - | 122 | addi r12, r12, iret@l |
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| - | 123 | mtlr r12 |
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| - | 124 | ||
| - | 125 | mfmsr r12 |
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| - | 126 | ori r12, r12, (msr_ir | msr_dr)@l |
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| - | 127 | mtsrr1 r12 |
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| - | 128 | ||
| - | 129 | addis sp, sp, 0x8000 |
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| - | 130 | mr r4, sp |
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| - | 131 | addi r4, r4, 8 |
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| - | 132 | ||
| - | 133 | rfi |
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| - | 134 | ||
| - | 135 | jump_to_kernel_syscall: |
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| - | 136 | lis r12, syscall_handler@ha |
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| - | 137 | addi r12, r12, syscall_handler@l |
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| - | 138 | mtsrr0 r12 |
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| - | 139 | ||
| - | 140 | lis r12, iret_syscall@ha |
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| - | 141 | addi r12, r12, iret_syscall@l |
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| - | 142 | mtlr r12 |
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| - | 143 | ||
| - | 144 | mfmsr r12 |
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| - | 145 | ori r12, r12, (msr_ir | msr_dr)@l |
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| - | 146 | mtsrr1 r12 |
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| - | 147 | ||
| - | 148 | addis sp, sp, 0x8000 |
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| - | 149 | rfi |
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| - | 150 | ||
| 34 | .org 0x100 |
151 | .org 0x100 |
| 35 | .global exc_system_reset |
152 | .global exc_system_reset |
| 36 | exc_system_reset: |
153 | exc_system_reset: |
| 37 | b exc_system_reset |
154 | b exc_system_reset |
| 38 | 155 | ||
| Line 42... | Line 159... | ||
| 42 | b exc_machine_check |
159 | b exc_machine_check |
| 43 | 160 | ||
| 44 | .org 0x300 |
161 | .org 0x300 |
| 45 | .global exc_data_storage |
162 | .global exc_data_storage |
| 46 | exc_data_storage: |
163 | exc_data_storage: |
| 47 | b exc_data_storage |
164 | CONTEXT_STORE |
| 48 | 165 | ||
| 49 | .org 0x380 |
166 | lis r12, pht_refill@ha |
| 50 | .global exc_data_segment |
167 | addi r12, r12, pht_refill@l |
| 51 | exc_data_segment: |
168 | mtsrr0 r12 |
| - | 169 | ||
| - | 170 | li r3, 1 |
|
| 52 | b exc_data_segment |
171 | b jump_to_kernel |
| 53 | 172 | ||
| 54 | .org 0x400 |
173 | .org 0x400 |
| 55 | .global exc_instruction_storage |
174 | .global exc_instruction_storage |
| 56 | exc_instruction_storage: |
175 | exc_instruction_storage: |
| 57 | b exc_instruction_storage |
176 | CONTEXT_STORE |
| 58 | 177 | ||
| 59 | .org 0x480 |
178 | lis r12, pht_refill@ha |
| 60 | .global exc_instruction_segment |
179 | addi r12, r12, pht_refill@l |
| 61 | exc_instruction_segment: |
180 | mtsrr0 r12 |
| - | 181 | ||
| - | 182 | li r3, 0 |
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| 62 | b exc_instruction_segment |
183 | b jump_to_kernel |
| 63 | 184 | ||
| 64 | .org 0x500 |
185 | .org 0x500 |
| 65 | .global exc_external |
186 | .global exc_external |
| 66 | exc_external: |
187 | exc_external: |
| 67 | b exc_external |
188 | b exc_external |
| Line 82... | Line 203... | ||
| 82 | b exc_fp_unavailable |
203 | b exc_fp_unavailable |
| 83 | 204 | ||
| 84 | .org 0x900 |
205 | .org 0x900 |
| 85 | .global exc_decrementer |
206 | .global exc_decrementer |
| 86 | exc_decrementer: |
207 | exc_decrementer: |
| 87 | mtspr sprg1, sp |
- | |
| 88 | - | ||
| 89 | subis sp, sp, 0x8000 |
- | |
| 90 | - | ||
| 91 | subi sp, sp, 144 |
- | |
| 92 | stw r0, 0(sp) |
- | |
| 93 | stw r2, 4(sp) |
- | |
| 94 | stw r3, 8(sp) |
208 | CONTEXT_STORE |
| 95 | stw r4, 12(sp) |
- | |
| 96 | stw r5, 16(sp) |
- | |
| 97 | stw r6, 20(sp) |
- | |
| 98 | stw r7, 24(sp) |
- | |
| 99 | stw r8, 28(sp) |
- | |
| 100 | stw r9, 32(sp) |
- | |
| 101 | stw r10, 36(sp) |
- | |
| 102 | stw r11, 40(sp) |
- | |
| 103 | stw r12, 44(sp) |
- | |
| 104 | stw r13, 48(sp) |
- | |
| 105 | stw r14, 52(sp) |
- | |
| 106 | stw r15, 56(sp) |
- | |
| 107 | stw r16, 60(sp) |
- | |
| 108 | stw r17, 64(sp) |
- | |
| 109 | stw r18, 68(sp) |
- | |
| 110 | stw r19, 72(sp) |
- | |
| 111 | stw r20, 76(sp) |
- | |
| 112 | stw r21, 80(sp) |
- | |
| 113 | stw r22, 84(sp) |
- | |
| 114 | stw r23, 88(sp) |
- | |
| 115 | stw r24, 92(sp) |
- | |
| 116 | stw r25, 96(sp) |
- | |
| 117 | stw r26, 100(sp) |
- | |
| 118 | stw r27, 104(sp) |
- | |
| 119 | stw r28, 108(sp) |
- | |
| 120 | stw r29, 112(sp) |
- | |
| 121 | stw r30, 116(sp) |
- | |
| 122 | stw r31, 120(sp) |
- | |
| 123 | - | ||
| 124 | mfspr r3, srr0 |
- | |
| 125 | stw r3, 124(sp) |
- | |
| 126 | - | ||
| 127 | mfspr r3, srr1 |
- | |
| 128 | stw r3, 128(sp) |
- | |
| 129 | - | ||
| 130 | mflr r3 |
- | |
| 131 | stw r3, 132(sp) |
- | |
| 132 | - | ||
| 133 | mfcr r3 |
- | |
| 134 | stw r3, 136(sp) |
- | |
| 135 | - | ||
| 136 | mfctr r3 |
- | |
| 137 | stw r3, 140(sp) |
- | |
| 138 | - | ||
| 139 | mfxer r3 |
- | |
| 140 | stw r3, 144(sp) |
- | |
| 141 | 209 | ||
| 142 | lis r3, exc_dispatch@ha |
210 | lis r12, exc_dispatch@ha |
| 143 | addi r3, r3, exc_dispatch@l |
211 | addi r12, r12, exc_dispatch@l |
| 144 | mtspr srr0, r3 |
- | |
| 145 | - | ||
| 146 | mfmsr r3 |
- | |
| 147 | ori r3, r3, (msr_ir | msr_dr)@l |
- | |
| 148 | mtspr srr1, r3 |
- | |
| 149 | - | ||
| 150 | lis r3, iret@ha |
- | |
| 151 | addi r3, r3, iret@l |
- | |
| 152 | mtlr r3 |
212 | mtsrr0 r12 |
| 153 | 213 | ||
| 154 | addis sp, sp, 0x8000 |
- | |
| 155 | li r3, 10 |
214 | li r3, 10 |
| 156 | rfid |
215 | b jump_to_kernel |
| 157 | 216 | ||
| 158 | .org 0xa00 |
217 | .org 0xa00 |
| 159 | .global exc_reserved0 |
218 | .global exc_reserved0 |
| 160 | exc_reserved0: |
219 | exc_reserved0: |
| 161 | b exc_reserved0 |
220 | b exc_reserved0 |
| Line 166... | Line 225... | ||
| 166 | b exc_reserved1 |
225 | b exc_reserved1 |
| 167 | 226 | ||
| 168 | .org 0xc00 |
227 | .org 0xc00 |
| 169 | .global exc_syscall |
228 | .global exc_syscall |
| 170 | exc_syscall: |
229 | exc_syscall: |
| - | 230 | CONTEXT_STORE |
|
| - | 231 | ||
| 171 | b exc_syscall |
232 | b jump_to_kernel_syscall |
| 172 | 233 | ||
| 173 | .org 0xd00 |
234 | .org 0xd00 |
| 174 | .global exc_trace |
235 | .global exc_trace |
| 175 | exc_trace: |
236 | exc_trace: |
| 176 | b exc_trace |
237 | b exc_trace |