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| 1 | # |
1 | # |
| 2 | # Copyright (C) 2005 Martin Decky |
2 | # Copyright (C) 2005 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 | 30 | ||
| 31 | .text |
31 | .text |
| 32 | 32 | ||
| 33 | .global userspace_asm |
33 | .global userspace_asm |
| 34 | .global iret |
34 | .global iret |
| - | 35 | .global iret_syscall |
|
| 35 | .global memsetb |
36 | .global memsetb |
| 36 | .global memcpy |
37 | .global memcpy |
| 37 | 38 | ||
| 38 | userspace_asm: |
39 | userspace_asm: |
| 39 | 40 | ||
| 40 | # r3 = uspace_uarg |
41 | # r3 = uspace_uarg |
| 41 | # r4 = stack |
42 | # r4 = stack |
| 42 | # r5 = entry |
43 | # r5 = entry |
| 43 | 44 | ||
| 44 | # disable interrupts |
45 | # disable interrupts |
| 45 | 46 | ||
| 46 | mfmsr r31 |
47 | mfmsr r31 |
| 47 | rlwinm r31, r31, 0, 17, 15 |
48 | rlwinm r31, r31, 0, 17, 15 |
| 48 | mtmsr r31 |
49 | mtmsr r31 |
| 49 | 50 | ||
| 50 | # set entry point |
51 | # set entry point |
| 51 | 52 | ||
| 52 | mtsrr0 r5 |
53 | mtsrr0 r5 |
| 53 | 54 | ||
| 54 | # set problem state, enable interrupts |
55 | # set problem state, enable interrupts |
| 55 | 56 | ||
| 56 | ori r31, r31, msr_pr |
57 | ori r31, r31, msr_pr |
| 57 | ori r31, r31, msr_ee |
58 | ori r31, r31, msr_ee |
| 58 | mtsrr1 r31 |
59 | mtsrr1 r31 |
| 59 | 60 | ||
| 60 | # set stack |
61 | # set stack |
| 61 | 62 | ||
| 62 | mr sp, r4 |
63 | mr sp, r4 |
| 63 | 64 | ||
| 64 | # jump to userspace |
65 | # jump to userspace |
| 65 | 66 | ||
| 66 | rfi |
67 | rfi |
| 67 | 68 | ||
| 68 | iret: |
69 | iret: |
| - | 70 | ||
| - | 71 | # disable interrupts |
|
| - | 72 | ||
| - | 73 | mfmsr r31 |
|
| - | 74 | rlwinm r31, r31, 0, 17, 15 |
|
| - | 75 | mtmsr r31 |
|
| - | 76 | ||
| 69 | lwz r0, 0(sp) |
77 | lwz r0, 0(sp) |
| 70 | lwz r2, 4(sp) |
78 | lwz r2, 4(sp) |
| 71 | lwz r3, 8(sp) |
79 | lwz r3, 8(sp) |
| 72 | lwz r4, 12(sp) |
80 | lwz r4, 12(sp) |
| 73 | lwz r5, 16(sp) |
81 | lwz r5, 16(sp) |
| 74 | lwz r6, 20(sp) |
82 | lwz r6, 20(sp) |
| 75 | lwz r7, 24(sp) |
83 | lwz r7, 24(sp) |
| 76 | lwz r8, 28(sp) |
84 | lwz r8, 28(sp) |
| 77 | lwz r9, 32(sp) |
85 | lwz r9, 32(sp) |
| 78 | lwz r10, 36(sp) |
86 | lwz r10, 36(sp) |
| 79 | lwz r11, 40(sp) |
87 | lwz r11, 40(sp) |
| 80 | lwz r13, 44(sp) |
88 | lwz r13, 44(sp) |
| 81 | lwz r14, 48(sp) |
89 | lwz r14, 48(sp) |
| 82 | lwz r15, 52(sp) |
90 | lwz r15, 52(sp) |
| 83 | lwz r16, 56(sp) |
91 | lwz r16, 56(sp) |
| 84 | lwz r17, 60(sp) |
92 | lwz r17, 60(sp) |
| 85 | lwz r18, 64(sp) |
93 | lwz r18, 64(sp) |
| 86 | lwz r19, 68(sp) |
94 | lwz r19, 68(sp) |
| 87 | lwz r20, 72(sp) |
95 | lwz r20, 72(sp) |
| 88 | lwz r21, 76(sp) |
96 | lwz r21, 76(sp) |
| 89 | lwz r22, 80(sp) |
97 | lwz r22, 80(sp) |
| 90 | lwz r23, 84(sp) |
98 | lwz r23, 84(sp) |
| 91 | lwz r24, 88(sp) |
99 | lwz r24, 88(sp) |
| 92 | lwz r25, 92(sp) |
100 | lwz r25, 92(sp) |
| 93 | lwz r26, 96(sp) |
101 | lwz r26, 96(sp) |
| 94 | lwz r27, 100(sp) |
102 | lwz r27, 100(sp) |
| 95 | lwz r28, 104(sp) |
103 | lwz r28, 104(sp) |
| 96 | lwz r29, 108(sp) |
104 | lwz r29, 108(sp) |
| 97 | lwz r30, 112(sp) |
105 | lwz r30, 112(sp) |
| 98 | lwz r31, 116(sp) |
106 | lwz r31, 116(sp) |
| 99 | 107 | ||
| 100 | lwz r12, 120(sp) |
108 | lwz r12, 120(sp) |
| 101 | mtsrr0 r12 |
109 | mtcr r12 |
| 102 | 110 | ||
| 103 | lwz r12, 124(sp) |
111 | lwz r12, 124(sp) |
| 104 | mtsrr1 r12 |
112 | mtsrr0 r12 |
| 105 | 113 | ||
| 106 | lwz r12, 128(sp) |
114 | lwz r12, 128(sp) |
| 107 | mtlr r12 |
115 | mtsrr1 r12 |
| 108 | 116 | ||
| 109 | lwz r12, 132(sp) |
117 | lwz r12, 132(sp) |
| 110 | mtcr r12 |
118 | mtlr r12 |
| 111 | 119 | ||
| 112 | lwz r12, 136(sp) |
120 | lwz r12, 136(sp) |
| 113 | mtctr r12 |
121 | mtctr r12 |
| 114 | 122 | ||
| 115 | lwz r12, 140(sp) |
123 | lwz r12, 140(sp) |
| 116 | mtxer r12 |
124 | mtxer r12 |
| - | 125 | ||
| - | 126 | lwz r12, 144(sp) |
|
| - | 127 | lwz sp, 148(sp) |
|
| - | 128 | ||
| - | 129 | rfi |
|
| 117 | 130 | ||
| 118 | mfsprg1 sp |
131 | iret_syscall: |
| 119 | mfsprg2 r12 |
- | |
| 120 | 132 | ||
| - | 133 | # disable interrupts |
|
| - | 134 | ||
| - | 135 | mfmsr r31 |
|
| - | 136 | rlwinm r31, r31, 0, 17, 15 |
|
| - | 137 | mtmsr r31 |
|
| - | 138 | ||
| - | 139 | lwz r0, 0(sp) |
|
| - | 140 | lwz r2, 4(sp) |
|
| - | 141 | lwz r4, 12(sp) |
|
| - | 142 | lwz r5, 16(sp) |
|
| - | 143 | lwz r6, 20(sp) |
|
| - | 144 | lwz r7, 24(sp) |
|
| - | 145 | lwz r8, 28(sp) |
|
| - | 146 | lwz r9, 32(sp) |
|
| - | 147 | lwz r10, 36(sp) |
|
| - | 148 | lwz r11, 40(sp) |
|
| - | 149 | lwz r13, 44(sp) |
|
| - | 150 | lwz r14, 48(sp) |
|
| - | 151 | lwz r15, 52(sp) |
|
| - | 152 | lwz r16, 56(sp) |
|
| - | 153 | lwz r17, 60(sp) |
|
| - | 154 | lwz r18, 64(sp) |
|
| - | 155 | lwz r19, 68(sp) |
|
| - | 156 | lwz r20, 72(sp) |
|
| - | 157 | lwz r21, 76(sp) |
|
| - | 158 | lwz r22, 80(sp) |
|
| - | 159 | lwz r23, 84(sp) |
|
| - | 160 | lwz r24, 88(sp) |
|
| - | 161 | lwz r25, 92(sp) |
|
| - | 162 | lwz r26, 96(sp) |
|
| - | 163 | lwz r27, 100(sp) |
|
| - | 164 | lwz r28, 104(sp) |
|
| - | 165 | lwz r29, 108(sp) |
|
| - | 166 | lwz r30, 112(sp) |
|
| - | 167 | lwz r31, 116(sp) |
|
| - | 168 | ||
| - | 169 | lwz r12, 120(sp) |
|
| - | 170 | mtcr r12 |
|
| - | 171 | ||
| - | 172 | lwz r12, 124(sp) |
|
| - | 173 | mtsrr0 r12 |
|
| - | 174 | ||
| - | 175 | lwz r12, 128(sp) |
|
| - | 176 | mtsrr1 r12 |
|
| - | 177 | ||
| - | 178 | lwz r12, 132(sp) |
|
| - | 179 | mtlr r12 |
|
| - | 180 | ||
| - | 181 | lwz r12, 136(sp) |
|
| - | 182 | mtctr r12 |
|
| - | 183 | ||
| - | 184 | lwz r12, 140(sp) |
|
| - | 185 | mtxer r12 |
|
| - | 186 | ||
| - | 187 | lwz r12, 144(sp) |
|
| - | 188 | lwz sp, 148(sp) |
|
| - | 189 | ||
| 121 | rfi |
190 | rfi |
| 122 | 191 | ||
| 123 | memsetb: |
192 | memsetb: |
| 124 | rlwimi r5, r5, 8, 16, 23 |
193 | rlwimi r5, r5, 8, 16, 23 |
| 125 | rlwimi r5, r5, 16, 0, 15 |
194 | rlwimi r5, r5, 16, 0, 15 |
| 126 | 195 | ||
| 127 | addi r14, r3, -4 |
196 | addi r14, r3, -4 |
| 128 | 197 | ||
| 129 | cmplwi 0, r4, 4 |
198 | cmplwi 0, r4, 4 |
| 130 | blt 7f |
199 | blt 7f |
| 131 | 200 | ||
| 132 | stwu r5, 4(r14) |
201 | stwu r5, 4(r14) |
| 133 | beqlr |
202 | beqlr |
| 134 | 203 | ||
| 135 | andi. r15, r14, 3 |
204 | andi. r15, r14, 3 |
| 136 | add r4, r15, r4 |
205 | add r4, r15, r4 |
| 137 | subf r14, r15, r14 |
206 | subf r14, r15, r14 |
| 138 | srwi r15, r4, 2 |
207 | srwi r15, r4, 2 |
| 139 | mtctr r15 |
208 | mtctr r15 |
| 140 | 209 | ||
| 141 | bdz 6f |
210 | bdz 6f |
| 142 | 211 | ||
| 143 | 1: |
212 | 1: |
| 144 | stwu r5, 4(r14) |
213 | stwu r5, 4(r14) |
| 145 | bdnz 1b |
214 | bdnz 1b |
| 146 | 215 | ||
| 147 | 6: |
216 | 6: |
| 148 | 217 | ||
| 149 | andi. r4, r4, 3 |
218 | andi. r4, r4, 3 |
| 150 | 219 | ||
| 151 | 7: |
220 | 7: |
| 152 | 221 | ||
| 153 | cmpwi 0, r4, 0 |
222 | cmpwi 0, r4, 0 |
| 154 | beqlr |
223 | beqlr |
| 155 | 224 | ||
| 156 | mtctr r4 |
225 | mtctr r4 |
| 157 | addi r6, r6, 3 |
226 | addi r6, r6, 3 |
| 158 | 227 | ||
| 159 | 8: |
228 | 8: |
| 160 | 229 | ||
| 161 | stbu r5, 1(r14) |
230 | stbu r5, 1(r14) |
| 162 | bdnz 8b |
231 | bdnz 8b |
| 163 | 232 | ||
| 164 | blr |
233 | blr |
| 165 | 234 | ||
| 166 | memcpy: |
235 | memcpy: |
| 167 | srwi. r7, r5, 3 |
236 | srwi. r7, r5, 3 |
| 168 | addi r6, r3, -4 |
237 | addi r6, r3, -4 |
| 169 | addi r4, r4, -4 |
238 | addi r4, r4, -4 |
| 170 | beq 2f |
239 | beq 2f |
| 171 | 240 | ||
| 172 | andi. r0, r6, 3 |
241 | andi. r0, r6, 3 |
| 173 | mtctr r7 |
242 | mtctr r7 |
| 174 | bne 5f |
243 | bne 5f |
| 175 | 244 | ||
| 176 | 1: |
245 | 1: |
| 177 | 246 | ||
| 178 | lwz r7, 4(r4) |
247 | lwz r7, 4(r4) |
| 179 | lwzu r8, 8(r4) |
248 | lwzu r8, 8(r4) |
| 180 | stw r7, 4(r6) |
249 | stw r7, 4(r6) |
| 181 | stwu r8, 8(r6) |
250 | stwu r8, 8(r6) |
| 182 | bdnz 1b |
251 | bdnz 1b |
| 183 | 252 | ||
| 184 | andi. r5, r5, 7 |
253 | andi. r5, r5, 7 |
| 185 | 254 | ||
| 186 | 2: |
255 | 2: |
| 187 | 256 | ||
| 188 | cmplwi 0, r5, 4 |
257 | cmplwi 0, r5, 4 |
| 189 | blt 3f |
258 | blt 3f |
| 190 | 259 | ||
| 191 | lwzu r0, 4(r4) |
260 | lwzu r0, 4(r4) |
| 192 | addi r5, r5, -4 |
261 | addi r5, r5, -4 |
| 193 | stwu r0, 4(r6) |
262 | stwu r0, 4(r6) |
| 194 | 263 | ||
| 195 | 3: |
264 | 3: |
| 196 | 265 | ||
| 197 | cmpwi 0, r5, 0 |
266 | cmpwi 0, r5, 0 |
| 198 | beqlr |
267 | beqlr |
| 199 | mtctr r5 |
268 | mtctr r5 |
| 200 | addi r4, r4, 3 |
269 | addi r4, r4, 3 |
| 201 | addi r6, r6, 3 |
270 | addi r6, r6, 3 |
| 202 | 271 | ||
| 203 | 4: |
272 | 4: |
| 204 | 273 | ||
| 205 | lbzu r0, 1(r4) |
274 | lbzu r0, 1(r4) |
| 206 | stbu r0, 1(r6) |
275 | stbu r0, 1(r6) |
| 207 | bdnz 4b |
276 | bdnz 4b |
| 208 | blr |
277 | blr |
| 209 | 278 | ||
| 210 | 5: |
279 | 5: |
| 211 | 280 | ||
| 212 | subfic r0, r0, 4 |
281 | subfic r0, r0, 4 |
| 213 | mtctr r0 |
282 | mtctr r0 |
| 214 | 283 | ||
| 215 | 6: |
284 | 6: |
| 216 | 285 | ||
| 217 | lbz r7, 4(r4) |
286 | lbz r7, 4(r4) |
| 218 | addi r4, r4, 1 |
287 | addi r4, r4, 1 |
| 219 | stb r7, 4(r6) |
288 | stb r7, 4(r6) |
| 220 | addi r6, r6, 1 |
289 | addi r6, r6, 1 |
| 221 | bdnz 6b |
290 | bdnz 6b |
| 222 | subf r5, r0, r5 |
291 | subf r5, r0, r5 |
| 223 | rlwinm. r7, r5, 32-3, 3, 31 |
292 | rlwinm. r7, r5, 32-3, 3, 31 |
| 224 | beq 2b |
293 | beq 2b |
| 225 | mtctr r7 |
294 | mtctr r7 |
| 226 | b 1b |
295 | b 1b |
| 227 | 296 | ||