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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 | mtspr sprg1, sp |
- | |
| 36 | 35 | ||
| - | 36 | # save SP in SPRG1 |
|
| - | 37 | # save R12 in SPRG2, backup CR in R12 |
|
| - | 38 | ||
| - | 39 | mtsprg1 sp |
|
| - | 40 | mtsprg2 r12 |
|
| - | 41 | mfcr r12 |
|
| - | 42 | ||
| - | 43 | # check whether SP is in kernel |
|
| - | 44 | ||
| 37 | subis sp, sp, 0x8000 |
45 | andis. sp, sp, 0x8000 |
| - | 46 | bne 1f |
|
| - | 47 | ||
| - | 48 | # stack is in user-space |
|
| - | 49 | ||
| - | 50 | mfsprg0 sp |
|
| - | 51 | ||
| - | 52 | b 2f |
|
| 38 | 53 | ||
| - | 54 | 1: |
|
| - | 55 | ||
| - | 56 | # stack is in kernel |
|
| - | 57 | ||
| - | 58 | mfsprg1 sp |
|
| - | 59 | subis sp, sp, 0x8000 |
|
| - | 60 | ||
| - | 61 | 2: |
|
| - | 62 | ||
| 39 | subi sp, sp, 144 |
63 | subi sp, sp, 140 |
| 40 | stw r0, 0(sp) |
64 | stw r0, 0(sp) |
| 41 | stw r2, 4(sp) |
65 | stw r2, 4(sp) |
| 42 | stw r3, 8(sp) |
66 | stw r3, 8(sp) |
| 43 | stw r4, 12(sp) |
67 | stw r4, 12(sp) |
| 44 | stw r5, 16(sp) |
68 | stw r5, 16(sp) |
| 45 | stw r6, 20(sp) |
69 | stw r6, 20(sp) |
| 46 | stw r7, 24(sp) |
70 | stw r7, 24(sp) |
| 47 | stw r8, 28(sp) |
71 | stw r8, 28(sp) |
| 48 | stw r9, 32(sp) |
72 | stw r9, 32(sp) |
| 49 | stw r10, 36(sp) |
73 | stw r10, 36(sp) |
| 50 | stw r11, 40(sp) |
74 | stw r11, 40(sp) |
| 51 | stw r12, 44(sp) |
75 | stw r13, 44(sp) |
| 52 | stw r13, 48(sp) |
76 | stw r14, 48(sp) |
| 53 | stw r14, 52(sp) |
77 | stw r15, 52(sp) |
| 54 | stw r15, 56(sp) |
78 | stw r16, 56(sp) |
| 55 | stw r16, 60(sp) |
79 | stw r17, 60(sp) |
| 56 | stw r17, 64(sp) |
80 | stw r18, 64(sp) |
| 57 | stw r18, 68(sp) |
81 | stw r19, 68(sp) |
| 58 | stw r19, 72(sp) |
82 | stw r20, 72(sp) |
| 59 | stw r20, 76(sp) |
83 | stw r21, 76(sp) |
| 60 | stw r21, 80(sp) |
84 | stw r22, 80(sp) |
| 61 | stw r22, 84(sp) |
85 | stw r23, 84(sp) |
| 62 | stw r23, 88(sp) |
86 | stw r24, 88(sp) |
| 63 | stw r24, 92(sp) |
87 | stw r25, 92(sp) |
| 64 | stw r25, 96(sp) |
88 | stw r26, 96(sp) |
| 65 | stw r26, 100(sp) |
89 | stw r27, 100(sp) |
| 66 | stw r27, 104(sp) |
90 | stw r28, 104(sp) |
| 67 | stw r28, 108(sp) |
91 | stw r29, 108(sp) |
| 68 | stw r29, 112(sp) |
- | |
| 69 | stw r30, 116(sp) |
92 | stw r30, 112(sp) |
| 70 | stw r31, 120(sp) |
93 | stw r31, 116(sp) |
| 71 | 94 | ||
| 72 | mfspr r3, srr0 |
95 | mfsrr0 r3 |
| 73 | stw r3, 124(sp) |
96 | stw r3, 120(sp) |
| 74 | 97 | ||
| 75 | mfspr r3, srr1 |
98 | mfsrr1 r3 |
| 76 | stw r3, 128(sp) |
99 | stw r3, 124(sp) |
| 77 | 100 | ||
| 78 | mflr r3 |
101 | mflr r3 |
| 79 | stw r3, 132(sp) |
102 | stw r3, 128(sp) |
| 80 | 103 | ||
| 81 | mfcr r3 |
- | |
| 82 | stw r3, 136(sp) |
104 | stw r12, 132(sp) |
| 83 | 105 | ||
| 84 | mfctr r3 |
106 | mfctr r3 |
| 85 | stw r3, 140(sp) |
107 | stw r3, 136(sp) |
| 86 | 108 | ||
| 87 | mfxer r3 |
109 | mfxer r3 |
| 88 | stw r3, 144(sp) |
110 | stw r3, 140(sp) |
| 89 | .endm |
111 | .endm |
| 90 | 112 | ||
| 91 | .org 0x100 |
113 | .org 0x100 |
| 92 | .global exc_system_reset |
114 | .global exc_system_reset |
| 93 | exc_system_reset: |
115 | exc_system_reset: |
| 94 | b exc_system_reset |
116 | b exc_system_reset |
| 95 | 117 | ||
| 96 | .org 0x200 |
118 | .org 0x200 |
| 97 | .global exc_machine_check |
119 | .global exc_machine_check |
| 98 | exc_machine_check: |
120 | exc_machine_check: |
| 99 | b exc_machine_check |
121 | b exc_machine_check |
| 100 | 122 | ||
| 101 | .org 0x300 |
123 | .org 0x300 |
| 102 | .global exc_data_storage |
124 | .global exc_data_storage |
| 103 | exc_data_storage: |
125 | exc_data_storage: |
| 104 | CONTEXT_STORE |
126 | CONTEXT_STORE |
| 105 | 127 | ||
| 106 | lis r3, pht_refill@ha |
128 | lis r3, pht_refill@ha |
| 107 | addi r3, r3, pht_refill@l |
129 | addi r3, r3, pht_refill@l |
| 108 | mtspr srr0, r3 |
130 | mtsrr0 r3 |
| 109 | 131 | ||
| 110 | mfmsr r3 |
132 | mfmsr r3 |
| 111 | ori r3, r3, (msr_ir | msr_dr)@l |
133 | ori r3, r3, (msr_ir | msr_dr)@l |
| 112 | mtspr srr1, r3 |
134 | mtsrr1 r3 |
| 113 | 135 | ||
| 114 | lis r3, iret@ha |
136 | lis r3, iret@ha |
| 115 | addi r3, r3, iret@l |
137 | addi r3, r3, iret@l |
| 116 | mtlr r3 |
138 | mtlr r3 |
| 117 | 139 | ||
| 118 | addis sp, sp, 0x8000 |
140 | addis sp, sp, 0x8000 |
| - | 141 | mr r3, sp |
|
| 119 | rfi |
142 | rfi |
| 120 | 143 | ||
| 121 | .org 0x400 |
144 | .org 0x400 |
| 122 | .global exc_instruction_storage |
145 | .global exc_instruction_storage |
| 123 | exc_instruction_storage: |
146 | exc_instruction_storage: |
| - | 147 | CONTEXT_STORE |
|
| - | 148 | ||
| - | 149 | lis r3, pht_refill@ha |
|
| 124 | b exc_instruction_storage |
150 | addi r3, r3, pht_refill@l |
| - | 151 | mtsrr0 r3 |
|
| 125 | 152 | ||
| 126 | .org 0x480 |
153 | mfmsr r3 |
| 127 | .global exc_instruction_segment |
154 | ori r3, r3, (msr_ir | msr_dr)@l |
| - | 155 | mtsrr1 r3 |
|
| - | 156 | ||
| 128 | exc_instruction_segment: |
157 | lis r3, iret@ha |
| 129 | b exc_instruction_segment |
158 | addi r3, r3, iret@l |
| - | 159 | mtlr r3 |
|
| - | 160 | ||
| - | 161 | addis sp, sp, 0x8000 |
|
| - | 162 | mr r3, sp |
|
| - | 163 | rfi |
|
| 130 | 164 | ||
| 131 | .org 0x500 |
165 | .org 0x500 |
| 132 | .global exc_external |
166 | .global exc_external |
| 133 | exc_external: |
167 | exc_external: |
| 134 | b exc_external |
168 | b exc_external |
| 135 | 169 | ||
| 136 | .org 0x600 |
170 | .org 0x600 |
| 137 | .global exc_alignment |
171 | .global exc_alignment |
| 138 | exc_alignment: |
172 | exc_alignment: |
| 139 | b exc_alignment |
173 | b exc_alignment |
| 140 | 174 | ||
| 141 | .org 0x700 |
175 | .org 0x700 |
| 142 | .global exc_program |
176 | .global exc_program |
| 143 | exc_program: |
177 | exc_program: |
| 144 | b exc_program |
178 | b exc_program |
| 145 | 179 | ||
| 146 | .org 0x800 |
180 | .org 0x800 |
| 147 | .global exc_fp_unavailable |
181 | .global exc_fp_unavailable |
| 148 | exc_fp_unavailable: |
182 | exc_fp_unavailable: |
| 149 | b exc_fp_unavailable |
183 | b exc_fp_unavailable |
| 150 | 184 | ||
| 151 | .org 0x900 |
185 | .org 0x900 |
| 152 | .global exc_decrementer |
186 | .global exc_decrementer |
| 153 | exc_decrementer: |
187 | exc_decrementer: |
| 154 | CONTEXT_STORE |
188 | CONTEXT_STORE |
| 155 | 189 | ||
| 156 | lis r3, exc_dispatch@ha |
190 | lis r3, exc_dispatch@ha |
| 157 | addi r3, r3, exc_dispatch@l |
191 | addi r3, r3, exc_dispatch@l |
| 158 | mtspr srr0, r3 |
192 | mtsrr0 r3 |
| 159 | 193 | ||
| 160 | mfmsr r3 |
194 | mfmsr r3 |
| 161 | ori r3, r3, (msr_ir | msr_dr)@l |
195 | ori r3, r3, (msr_ir | msr_dr)@l |
| 162 | mtspr srr1, r3 |
196 | mtsrr1 r3 |
| 163 | 197 | ||
| 164 | lis r3, iret@ha |
198 | lis r3, iret@ha |
| 165 | addi r3, r3, iret@l |
199 | addi r3, r3, iret@l |
| 166 | mtlr r3 |
200 | mtlr r3 |
| 167 | 201 | ||
| 168 | addis sp, sp, 0x8000 |
202 | addis sp, sp, 0x8000 |
| 169 | li r3, 10 |
203 | li r3, 10 |
| - | 204 | mr r4, sp |
|
| 170 | rfi |
205 | rfi |
| 171 | 206 | ||
| 172 | .org 0xa00 |
207 | .org 0xa00 |
| 173 | .global exc_reserved0 |
208 | .global exc_reserved0 |
| 174 | exc_reserved0: |
209 | exc_reserved0: |
| 175 | b exc_reserved0 |
210 | b exc_reserved0 |
| 176 | 211 | ||
| 177 | .org 0xb00 |
212 | .org 0xb00 |
| 178 | .global exc_reserved1 |
213 | .global exc_reserved1 |
| 179 | exc_reserved1: |
214 | exc_reserved1: |
| 180 | b exc_reserved1 |
215 | b exc_reserved1 |
| 181 | 216 | ||
| 182 | .org 0xc00 |
217 | .org 0xc00 |
| 183 | .global exc_syscall |
218 | .global exc_syscall |
| 184 | exc_syscall: |
219 | exc_syscall: |
| 185 | b exc_syscall |
220 | b exc_syscall |
| 186 | 221 | ||
| 187 | .org 0xd00 |
222 | .org 0xd00 |
| 188 | .global exc_trace |
223 | .global exc_trace |
| 189 | exc_trace: |
224 | exc_trace: |
| 190 | b exc_trace |
225 | b exc_trace |
| 191 | 226 | ||