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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 iret_syscall |
| 36 | .global memsetb |
36 | .global memsetb |
| 37 | .global memcpy |
37 | .global memcpy |
| 38 | .global memcpy_from_uspace |
38 | .global memcpy_from_uspace |
| 39 | .global memcpy_to_uspace |
39 | .global memcpy_to_uspace |
| 40 | .global memcpy_from_uspace_failover_address |
40 | .global memcpy_from_uspace_failover_address |
| 41 | .global memcpy_to_uspace_failover_address |
41 | .global memcpy_to_uspace_failover_address |
| 42 | 42 | ||
| 43 | userspace_asm: |
43 | userspace_asm: |
| 44 | 44 | ||
| 45 | # r3 = uspace_uarg |
45 | # r3 = uspace_uarg |
| 46 | # r4 = stack |
46 | # r4 = stack |
| 47 | # r5 = entry |
47 | # r5 = entry |
| 48 | 48 | ||
| 49 | # disable interrupts |
49 | # disable interrupts |
| 50 | 50 | ||
| 51 | mfmsr r31 |
51 | mfmsr r31 |
| 52 | rlwinm r31, r31, 0, 17, 15 |
52 | rlwinm r31, r31, 0, 17, 15 |
| 53 | mtmsr r31 |
53 | mtmsr r31 |
| 54 | 54 | ||
| 55 | # set entry point |
55 | # set entry point |
| 56 | 56 | ||
| 57 | mtsrr0 r5 |
57 | mtsrr0 r5 |
| 58 | 58 | ||
| 59 | # set problem state, enable interrupts |
59 | # set problem state, enable interrupts |
| 60 | 60 | ||
| 61 | ori r31, r31, msr_pr |
61 | ori r31, r31, msr_pr |
| 62 | ori r31, r31, msr_ee |
62 | ori r31, r31, msr_ee |
| 63 | mtsrr1 r31 |
63 | mtsrr1 r31 |
| 64 | 64 | ||
| 65 | # set stack |
65 | # set stack |
| 66 | 66 | ||
| 67 | mr sp, r4 |
67 | mr sp, r4 |
| - | 68 | ||
| - | 69 | # %r6 is defined to hold pcb_ptr - set it to 0 |
|
| - | 70 | ||
| - | 71 | xor r6, r6, r6 |
|
| 68 | 72 | ||
| 69 | # jump to userspace |
73 | # jump to userspace |
| 70 | 74 | ||
| 71 | rfi |
75 | rfi |
| 72 | 76 | ||
| 73 | iret: |
77 | iret: |
| 74 | 78 | ||
| 75 | # disable interrupts |
79 | # disable interrupts |
| 76 | 80 | ||
| 77 | mfmsr r31 |
81 | mfmsr r31 |
| 78 | rlwinm r31, r31, 0, 17, 15 |
82 | rlwinm r31, r31, 0, 17, 15 |
| 79 | mtmsr r31 |
83 | mtmsr r31 |
| 80 | 84 | ||
| 81 | lwz r0, 8(sp) |
85 | lwz r0, 8(sp) |
| 82 | lwz r2, 12(sp) |
86 | lwz r2, 12(sp) |
| 83 | lwz r3, 16(sp) |
87 | lwz r3, 16(sp) |
| 84 | lwz r4, 20(sp) |
88 | lwz r4, 20(sp) |
| 85 | lwz r5, 24(sp) |
89 | lwz r5, 24(sp) |
| 86 | lwz r6, 28(sp) |
90 | lwz r6, 28(sp) |
| 87 | lwz r7, 32(sp) |
91 | lwz r7, 32(sp) |
| 88 | lwz r8, 36(sp) |
92 | lwz r8, 36(sp) |
| 89 | lwz r9, 40(sp) |
93 | lwz r9, 40(sp) |
| 90 | lwz r10, 44(sp) |
94 | lwz r10, 44(sp) |
| 91 | lwz r11, 48(sp) |
95 | lwz r11, 48(sp) |
| 92 | lwz r13, 52(sp) |
96 | lwz r13, 52(sp) |
| 93 | lwz r14, 56(sp) |
97 | lwz r14, 56(sp) |
| 94 | lwz r15, 60(sp) |
98 | lwz r15, 60(sp) |
| 95 | lwz r16, 64(sp) |
99 | lwz r16, 64(sp) |
| 96 | lwz r17, 68(sp) |
100 | lwz r17, 68(sp) |
| 97 | lwz r18, 72(sp) |
101 | lwz r18, 72(sp) |
| 98 | lwz r19, 76(sp) |
102 | lwz r19, 76(sp) |
| 99 | lwz r20, 80(sp) |
103 | lwz r20, 80(sp) |
| 100 | lwz r21, 84(sp) |
104 | lwz r21, 84(sp) |
| 101 | lwz r22, 88(sp) |
105 | lwz r22, 88(sp) |
| 102 | lwz r23, 92(sp) |
106 | lwz r23, 92(sp) |
| 103 | lwz r24, 96(sp) |
107 | lwz r24, 96(sp) |
| 104 | lwz r25, 100(sp) |
108 | lwz r25, 100(sp) |
| 105 | lwz r26, 104(sp) |
109 | lwz r26, 104(sp) |
| 106 | lwz r27, 108(sp) |
110 | lwz r27, 108(sp) |
| 107 | lwz r28, 112(sp) |
111 | lwz r28, 112(sp) |
| 108 | lwz r29, 116(sp) |
112 | lwz r29, 116(sp) |
| 109 | lwz r30, 120(sp) |
113 | lwz r30, 120(sp) |
| 110 | lwz r31, 124(sp) |
114 | lwz r31, 124(sp) |
| 111 | 115 | ||
| 112 | lwz r12, 128(sp) |
116 | lwz r12, 128(sp) |
| 113 | mtcr r12 |
117 | mtcr r12 |
| 114 | 118 | ||
| 115 | lwz r12, 132(sp) |
119 | lwz r12, 132(sp) |
| 116 | mtsrr0 r12 |
120 | mtsrr0 r12 |
| 117 | 121 | ||
| 118 | lwz r12, 136(sp) |
122 | lwz r12, 136(sp) |
| 119 | mtsrr1 r12 |
123 | mtsrr1 r12 |
| 120 | 124 | ||
| 121 | lwz r12, 140(sp) |
125 | lwz r12, 140(sp) |
| 122 | mtlr r12 |
126 | mtlr r12 |
| 123 | 127 | ||
| 124 | lwz r12, 144(sp) |
128 | lwz r12, 144(sp) |
| 125 | mtctr r12 |
129 | mtctr r12 |
| 126 | 130 | ||
| 127 | lwz r12, 148(sp) |
131 | lwz r12, 148(sp) |
| 128 | mtxer r12 |
132 | mtxer r12 |
| 129 | 133 | ||
| 130 | lwz r12, 152(sp) |
134 | lwz r12, 156(sp) |
| 131 | lwz sp, 156(sp) |
135 | lwz sp, 160(sp) |
| 132 | 136 | ||
| 133 | rfi |
137 | rfi |
| 134 | 138 | ||
| 135 | iret_syscall: |
139 | iret_syscall: |
| 136 | 140 | ||
| 137 | # reset decrementer |
141 | # reset decrementer |
| 138 | 142 | ||
| 139 | li r31, 1000 |
143 | li r31, 1000 |
| 140 | mtdec r31 |
144 | mtdec r31 |
| 141 | 145 | ||
| 142 | # disable interrupts |
146 | # disable interrupts |
| 143 | 147 | ||
| 144 | mfmsr r31 |
148 | mfmsr r31 |
| 145 | rlwinm r31, r31, 0, 17, 15 |
149 | rlwinm r31, r31, 0, 17, 15 |
| 146 | mtmsr r31 |
150 | mtmsr r31 |
| 147 | 151 | ||
| 148 | lwz r0, 8(sp) |
152 | lwz r0, 8(sp) |
| 149 | lwz r2, 12(sp) |
153 | lwz r2, 12(sp) |
| 150 | lwz r4, 20(sp) |
154 | lwz r4, 20(sp) |
| 151 | lwz r5, 24(sp) |
155 | lwz r5, 24(sp) |
| 152 | lwz r6, 28(sp) |
156 | lwz r6, 28(sp) |
| 153 | lwz r7, 32(sp) |
157 | lwz r7, 32(sp) |
| 154 | lwz r8, 36(sp) |
158 | lwz r8, 36(sp) |
| 155 | lwz r9, 40(sp) |
159 | lwz r9, 40(sp) |
| 156 | lwz r10, 44(sp) |
160 | lwz r10, 44(sp) |
| 157 | lwz r11, 48(sp) |
161 | lwz r11, 48(sp) |
| 158 | lwz r13, 52(sp) |
162 | lwz r13, 52(sp) |
| 159 | lwz r14, 56(sp) |
163 | lwz r14, 56(sp) |
| 160 | lwz r15, 60(sp) |
164 | lwz r15, 60(sp) |
| 161 | lwz r16, 64(sp) |
165 | lwz r16, 64(sp) |
| 162 | lwz r17, 68(sp) |
166 | lwz r17, 68(sp) |
| 163 | lwz r18, 72(sp) |
167 | lwz r18, 72(sp) |
| 164 | lwz r19, 76(sp) |
168 | lwz r19, 76(sp) |
| 165 | lwz r20, 80(sp) |
169 | lwz r20, 80(sp) |
| 166 | lwz r21, 84(sp) |
170 | lwz r21, 84(sp) |
| 167 | lwz r22, 88(sp) |
171 | lwz r22, 88(sp) |
| 168 | lwz r23, 92(sp) |
172 | lwz r23, 92(sp) |
| 169 | lwz r24, 96(sp) |
173 | lwz r24, 96(sp) |
| 170 | lwz r25, 100(sp) |
174 | lwz r25, 100(sp) |
| 171 | lwz r26, 104(sp) |
175 | lwz r26, 104(sp) |
| 172 | lwz r27, 108(sp) |
176 | lwz r27, 108(sp) |
| 173 | lwz r28, 112(sp) |
177 | lwz r28, 112(sp) |
| 174 | lwz r29, 116(sp) |
178 | lwz r29, 116(sp) |
| 175 | lwz r30, 120(sp) |
179 | lwz r30, 120(sp) |
| 176 | lwz r31, 124(sp) |
180 | lwz r31, 124(sp) |
| 177 | 181 | ||
| 178 | lwz r12, 128(sp) |
182 | lwz r12, 128(sp) |
| 179 | mtcr r12 |
183 | mtcr r12 |
| 180 | 184 | ||
| 181 | lwz r12, 132(sp) |
185 | lwz r12, 132(sp) |
| 182 | mtsrr0 r12 |
186 | mtsrr0 r12 |
| 183 | 187 | ||
| 184 | lwz r12, 136(sp) |
188 | lwz r12, 136(sp) |
| 185 | mtsrr1 r12 |
189 | mtsrr1 r12 |
| 186 | 190 | ||
| 187 | lwz r12, 140(sp) |
191 | lwz r12, 140(sp) |
| 188 | mtlr r12 |
192 | mtlr r12 |
| 189 | 193 | ||
| 190 | lwz r12, 144(sp) |
194 | lwz r12, 144(sp) |
| 191 | mtctr r12 |
195 | mtctr r12 |
| 192 | 196 | ||
| 193 | lwz r12, 148(sp) |
197 | lwz r12, 148(sp) |
| 194 | mtxer r12 |
198 | mtxer r12 |
| 195 | 199 | ||
| 196 | lwz r12, 152(sp) |
200 | lwz r12, 156(sp) |
| 197 | lwz sp, 156(sp) |
201 | lwz sp, 160(sp) |
| 198 | 202 | ||
| 199 | rfi |
203 | rfi |
| 200 | 204 | ||
| 201 | memsetb: |
205 | memsetb: |
| 202 | rlwimi r5, r5, 8, 16, 23 |
- | |
| 203 | rlwimi r5, r5, 16, 0, 15 |
- | |
| 204 | - | ||
| 205 | addi r14, r3, -4 |
- | |
| 206 | - | ||
| 207 | cmplwi 0, r4, 4 |
- | |
| 208 | blt 7f |
- | |
| 209 | - | ||
| 210 | stwu r5, 4(r14) |
- | |
| 211 | beqlr |
- | |
| 212 | - | ||
| 213 | andi. r15, r14, 3 |
- | |
| 214 | add r4, r15, r4 |
- | |
| 215 | subf r14, r15, r14 |
- | |
| 216 | srwi r15, r4, 2 |
- | |
| 217 | mtctr r15 |
- | |
| 218 | - | ||
| 219 | bdz 6f |
- | |
| 220 | - | ||
| 221 | 1: |
- | |
| 222 | stwu r5, 4(r14) |
- | |
| 223 | bdnz 1b |
- | |
| 224 | - | ||
| 225 | 6: |
- | |
| 226 | - | ||
| 227 | andi. r4, r4, 3 |
- | |
| 228 | - | ||
| 229 | 7: |
- | |
| 230 | - | ||
| 231 | cmpwi 0, r4, 0 |
- | |
| 232 | beqlr |
- | |
| 233 | - | ||
| 234 | mtctr r4 |
- | |
| 235 | addi r6, r6, 3 |
- | |
| 236 | - | ||
| 237 | 8: |
- | |
| 238 | - | ||
| 239 | stbu r5, 1(r14) |
- | |
| 240 | bdnz 8b |
206 | b _memsetb |
| 241 | - | ||
| 242 | blr |
- | |
| 243 | 207 | ||
| 244 | memcpy: |
208 | memcpy: |
| 245 | memcpy_from_uspace: |
209 | memcpy_from_uspace: |
| 246 | memcpy_to_uspace: |
210 | memcpy_to_uspace: |
| 247 | 211 | ||
| 248 | srwi. r7, r5, 3 |
212 | srwi. r7, r5, 3 |
| 249 | addi r6, r3, -4 |
213 | addi r6, r3, -4 |
| 250 | addi r4, r4, -4 |
214 | addi r4, r4, -4 |
| 251 | beq 2f |
215 | beq 2f |
| 252 | 216 | ||
| 253 | andi. r0, r6, 3 |
217 | andi. r0, r6, 3 |
| 254 | mtctr r7 |
218 | mtctr r7 |
| 255 | bne 5f |
219 | bne 5f |
| 256 | 220 | ||
| 257 | 1: |
221 | 1: |
| 258 | 222 | ||
| 259 | lwz r7, 4(r4) |
223 | lwz r7, 4(r4) |
| 260 | lwzu r8, 8(r4) |
224 | lwzu r8, 8(r4) |
| 261 | stw r7, 4(r6) |
225 | stw r7, 4(r6) |
| 262 | stwu r8, 8(r6) |
226 | stwu r8, 8(r6) |
| 263 | bdnz 1b |
227 | bdnz 1b |
| 264 | 228 | ||
| 265 | andi. r5, r5, 7 |
229 | andi. r5, r5, 7 |
| 266 | 230 | ||
| 267 | 2: |
231 | 2: |
| 268 | 232 | ||
| 269 | cmplwi 0, r5, 4 |
233 | cmplwi 0, r5, 4 |
| 270 | blt 3f |
234 | blt 3f |
| 271 | 235 | ||
| 272 | lwzu r0, 4(r4) |
236 | lwzu r0, 4(r4) |
| 273 | addi r5, r5, -4 |
237 | addi r5, r5, -4 |
| 274 | stwu r0, 4(r6) |
238 | stwu r0, 4(r6) |
| 275 | 239 | ||
| 276 | 3: |
240 | 3: |
| 277 | 241 | ||
| 278 | cmpwi 0, r5, 0 |
242 | cmpwi 0, r5, 0 |
| 279 | beqlr |
243 | beqlr |
| 280 | mtctr r5 |
244 | mtctr r5 |
| 281 | addi r4, r4, 3 |
245 | addi r4, r4, 3 |
| 282 | addi r6, r6, 3 |
246 | addi r6, r6, 3 |
| 283 | 247 | ||
| 284 | 4: |
248 | 4: |
| 285 | 249 | ||
| 286 | lbzu r0, 1(r4) |
250 | lbzu r0, 1(r4) |
| 287 | stbu r0, 1(r6) |
251 | stbu r0, 1(r6) |
| 288 | bdnz 4b |
252 | bdnz 4b |
| 289 | blr |
253 | blr |
| 290 | 254 | ||
| 291 | 5: |
255 | 5: |
| 292 | 256 | ||
| 293 | subfic r0, r0, 4 |
257 | subfic r0, r0, 4 |
| 294 | mtctr r0 |
258 | mtctr r0 |
| 295 | 259 | ||
| 296 | 6: |
260 | 6: |
| 297 | 261 | ||
| 298 | lbz r7, 4(r4) |
262 | lbz r7, 4(r4) |
| 299 | addi r4, r4, 1 |
263 | addi r4, r4, 1 |
| 300 | stb r7, 4(r6) |
264 | stb r7, 4(r6) |
| 301 | addi r6, r6, 1 |
265 | addi r6, r6, 1 |
| 302 | bdnz 6b |
266 | bdnz 6b |
| 303 | subf r5, r0, r5 |
267 | subf r5, r0, r5 |
| 304 | rlwinm. r7, r5, 32-3, 3, 31 |
268 | rlwinm. r7, r5, 32-3, 3, 31 |
| 305 | beq 2b |
269 | beq 2b |
| 306 | mtctr r7 |
270 | mtctr r7 |
| 307 | b 1b |
271 | b 1b |
| 308 | 272 | ||
| 309 | memcpy_from_uspace_failover_address: |
273 | memcpy_from_uspace_failover_address: |
| 310 | memcpy_to_uspace_failover_address: |
274 | memcpy_to_uspace_failover_address: |
| 311 | b memcpy_from_uspace_failover_address |
275 | # return zero, failure |
| - | 276 | xor r3, r3, r3 |
|
| - | 277 | blr |
|
| 312 | 278 | ||