Rev 1378 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 162 | decky | 1 | # |
| 2 | # Copyright (C) 2005 Martin Decky |
||
| 3 | # All rights reserved. |
||
| 4 | # |
||
| 5 | # Redistribution and use in source and binary forms, with or without |
||
| 6 | # modification, are permitted provided that the following conditions |
||
| 7 | # are met: |
||
| 8 | # |
||
| 9 | # - Redistributions of source code must retain the above copyright |
||
| 10 | # notice, this list of conditions and the following disclaimer. |
||
| 11 | # - Redistributions in binary form must reproduce the above copyright |
||
| 12 | # notice, this list of conditions and the following disclaimer in the |
||
| 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 |
||
| 15 | # derived from this software without specific prior written permission. |
||
| 16 | # |
||
| 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 |
||
| 19 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 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 |
||
| 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 |
||
| 26 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | # |
||
| 28 | |||
| 845 | decky | 29 | #include <arch/asm/regname.h> |
| 191 | decky | 30 | |
| 162 | decky | 31 | .text |
| 32 | |||
| 1220 | decky | 33 | .global userspace_asm |
| 1004 | decky | 34 | .global iret |
| 1277 | decky | 35 | .global iret_syscall |
| 210 | decky | 36 | .global memsetb |
| 37 | .global memcpy |
||
| 1288 | jermar | 38 | .global memcpy_from_uspace |
| 39 | .global memcpy_to_uspace |
||
| 40 | .global memcpy_from_uspace_failover_address |
||
| 41 | .global memcpy_to_uspace_failover_address |
||
| 185 | decky | 42 | |
| 1220 | decky | 43 | userspace_asm: |
| 44 | |||
| 45 | # r3 = uspace_uarg |
||
| 46 | # r4 = stack |
||
| 1267 | decky | 47 | # r5 = entry |
| 48 | |||
| 49 | # disable interrupts |
||
| 1220 | decky | 50 | |
| 51 | mfmsr r31 |
||
| 52 | rlwinm r31, r31, 0, 17, 15 |
||
| 53 | mtmsr r31 |
||
| 54 | |||
| 55 | # set entry point |
||
| 56 | |||
| 57 | mtsrr0 r5 |
||
| 58 | |||
| 59 | # set problem state, enable interrupts |
||
| 60 | |||
| 1267 | decky | 61 | ori r31, r31, msr_pr |
| 62 | ori r31, r31, msr_ee |
||
| 1220 | decky | 63 | mtsrr1 r31 |
| 64 | |||
| 65 | # set stack |
||
| 66 | |||
| 67 | mr sp, r4 |
||
| 68 | |||
| 69 | # jump to userspace |
||
| 70 | |||
| 71 | rfi |
||
| 72 | |||
| 1004 | decky | 73 | iret: |
| 1277 | decky | 74 | |
| 75 | # disable interrupts |
||
| 76 | |||
| 77 | mfmsr r31 |
||
| 78 | rlwinm r31, r31, 0, 17, 15 |
||
| 79 | mtmsr r31 |
||
| 80 | |||
| 1355 | decky | 81 | lwz r0, 8(sp) |
| 82 | lwz r2, 12(sp) |
||
| 83 | lwz r3, 16(sp) |
||
| 84 | lwz r4, 20(sp) |
||
| 85 | lwz r5, 24(sp) |
||
| 86 | lwz r6, 28(sp) |
||
| 87 | lwz r7, 32(sp) |
||
| 88 | lwz r8, 36(sp) |
||
| 89 | lwz r9, 40(sp) |
||
| 90 | lwz r10, 44(sp) |
||
| 91 | lwz r11, 48(sp) |
||
| 92 | lwz r13, 52(sp) |
||
| 93 | lwz r14, 56(sp) |
||
| 94 | lwz r15, 60(sp) |
||
| 95 | lwz r16, 64(sp) |
||
| 96 | lwz r17, 68(sp) |
||
| 97 | lwz r18, 72(sp) |
||
| 98 | lwz r19, 76(sp) |
||
| 99 | lwz r20, 80(sp) |
||
| 100 | lwz r21, 84(sp) |
||
| 101 | lwz r22, 88(sp) |
||
| 102 | lwz r23, 92(sp) |
||
| 103 | lwz r24, 96(sp) |
||
| 104 | lwz r25, 100(sp) |
||
| 105 | lwz r26, 104(sp) |
||
| 106 | lwz r27, 108(sp) |
||
| 107 | lwz r28, 112(sp) |
||
| 108 | lwz r29, 116(sp) |
||
| 109 | lwz r30, 120(sp) |
||
| 110 | lwz r31, 124(sp) |
||
| 1004 | decky | 111 | |
| 1355 | decky | 112 | lwz r12, 128(sp) |
| 1277 | decky | 113 | mtcr r12 |
| 114 | |||
| 1355 | decky | 115 | lwz r12, 132(sp) |
| 1267 | decky | 116 | mtsrr0 r12 |
| 1004 | decky | 117 | |
| 1355 | decky | 118 | lwz r12, 136(sp) |
| 1267 | decky | 119 | mtsrr1 r12 |
| 120 | |||
| 1355 | decky | 121 | lwz r12, 140(sp) |
| 1267 | decky | 122 | mtlr r12 |
| 123 | |||
| 1355 | decky | 124 | lwz r12, 144(sp) |
| 1277 | decky | 125 | mtctr r12 |
| 126 | |||
| 1355 | decky | 127 | lwz r12, 148(sp) |
| 1277 | decky | 128 | mtxer r12 |
| 129 | |||
| 1355 | decky | 130 | lwz r12, 152(sp) |
| 131 | lwz sp, 156(sp) |
||
| 1277 | decky | 132 | |
| 133 | rfi |
||
| 134 | |||
| 135 | iret_syscall: |
||
| 136 | |||
| 1384 | decky | 137 | # reset decrementer |
| 138 | |||
| 139 | li r31, 1000 |
||
| 140 | mtdec r31 |
||
| 141 | |||
| 1277 | decky | 142 | # disable interrupts |
| 143 | |||
| 144 | mfmsr r31 |
||
| 145 | rlwinm r31, r31, 0, 17, 15 |
||
| 146 | mtmsr r31 |
||
| 147 | |||
| 1355 | decky | 148 | lwz r0, 8(sp) |
| 149 | lwz r2, 12(sp) |
||
| 150 | lwz r4, 20(sp) |
||
| 151 | lwz r5, 24(sp) |
||
| 152 | lwz r6, 28(sp) |
||
| 153 | lwz r7, 32(sp) |
||
| 154 | lwz r8, 36(sp) |
||
| 155 | lwz r9, 40(sp) |
||
| 156 | lwz r10, 44(sp) |
||
| 157 | lwz r11, 48(sp) |
||
| 158 | lwz r13, 52(sp) |
||
| 159 | lwz r14, 56(sp) |
||
| 160 | lwz r15, 60(sp) |
||
| 161 | lwz r16, 64(sp) |
||
| 162 | lwz r17, 68(sp) |
||
| 163 | lwz r18, 72(sp) |
||
| 164 | lwz r19, 76(sp) |
||
| 165 | lwz r20, 80(sp) |
||
| 166 | lwz r21, 84(sp) |
||
| 167 | lwz r22, 88(sp) |
||
| 168 | lwz r23, 92(sp) |
||
| 169 | lwz r24, 96(sp) |
||
| 170 | lwz r25, 100(sp) |
||
| 171 | lwz r26, 104(sp) |
||
| 172 | lwz r27, 108(sp) |
||
| 173 | lwz r28, 112(sp) |
||
| 174 | lwz r29, 116(sp) |
||
| 175 | lwz r30, 120(sp) |
||
| 176 | lwz r31, 124(sp) |
||
| 1277 | decky | 177 | |
| 1355 | decky | 178 | lwz r12, 128(sp) |
| 1267 | decky | 179 | mtcr r12 |
| 180 | |||
| 1355 | decky | 181 | lwz r12, 132(sp) |
| 1277 | decky | 182 | mtsrr0 r12 |
| 183 | |||
| 1355 | decky | 184 | lwz r12, 136(sp) |
| 1277 | decky | 185 | mtsrr1 r12 |
| 186 | |||
| 1355 | decky | 187 | lwz r12, 140(sp) |
| 1277 | decky | 188 | mtlr r12 |
| 189 | |||
| 1355 | decky | 190 | lwz r12, 144(sp) |
| 1267 | decky | 191 | mtctr r12 |
| 192 | |||
| 1355 | decky | 193 | lwz r12, 148(sp) |
| 1267 | decky | 194 | mtxer r12 |
| 1277 | decky | 195 | |
| 1355 | decky | 196 | lwz r12, 152(sp) |
| 197 | lwz sp, 156(sp) |
||
| 1267 | decky | 198 | |
| 1004 | decky | 199 | rfi |
| 200 | |||
| 210 | decky | 201 | 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 |
||
| 241 | |||
| 242 | blr |
||
| 243 | |||
| 244 | memcpy: |
||
| 1288 | jermar | 245 | memcpy_from_uspace: |
| 246 | memcpy_to_uspace: |
||
| 247 | |||
| 860 | decky | 248 | srwi. r7, r5, 3 |
| 249 | addi r6, r3, -4 |
||
| 250 | addi r4, r4, -4 |
||
| 251 | beq 2f |
||
| 252 | |||
| 253 | andi. r0, r6, 3 |
||
| 254 | mtctr r7 |
||
| 255 | bne 5f |
||
| 256 | |||
| 257 | 1: |
||
| 258 | |||
| 259 | lwz r7, 4(r4) |
||
| 260 | lwzu r8, 8(r4) |
||
| 261 | stw r7, 4(r6) |
||
| 262 | stwu r8, 8(r6) |
||
| 263 | bdnz 1b |
||
| 264 | |||
| 265 | andi. r5, r5, 7 |
||
| 266 | |||
| 267 | 2: |
||
| 268 | |||
| 269 | cmplwi 0, r5, 4 |
||
| 270 | blt 3f |
||
| 271 | |||
| 272 | lwzu r0, 4(r4) |
||
| 273 | addi r5, r5, -4 |
||
| 274 | stwu r0, 4(r6) |
||
| 275 | |||
| 276 | 3: |
||
| 277 | |||
| 278 | cmpwi 0, r5, 0 |
||
| 279 | beqlr |
||
| 280 | mtctr r5 |
||
| 281 | addi r4, r4, 3 |
||
| 282 | addi r6, r6, 3 |
||
| 283 | |||
| 284 | 4: |
||
| 285 | |||
| 286 | lbzu r0, 1(r4) |
||
| 287 | stbu r0, 1(r6) |
||
| 288 | bdnz 4b |
||
| 210 | decky | 289 | blr |
| 860 | decky | 290 | |
| 291 | 5: |
||
| 292 | |||
| 293 | subfic r0, r0, 4 |
||
| 294 | mtctr r0 |
||
| 295 | |||
| 296 | 6: |
||
| 297 | |||
| 298 | lbz r7, 4(r4) |
||
| 299 | addi r4, r4, 1 |
||
| 300 | stb r7, 4(r6) |
||
| 301 | addi r6, r6, 1 |
||
| 302 | bdnz 6b |
||
| 303 | subf r5, r0, r5 |
||
| 304 | rlwinm. r7, r5, 32-3, 3, 31 |
||
| 305 | beq 2b |
||
| 306 | mtctr r7 |
||
| 307 | b 1b |
||
| 1288 | jermar | 308 | |
| 309 | memcpy_from_uspace_failover_address: |
||
| 310 | memcpy_to_uspace_failover_address: |
||
| 311 | b memcpy_from_uspace_failover_address |