| 1 | /* armcopro.c -- co-processor interface: ARM6 Instruction Emulator. |
| 2 | Copyright (C) 1994, 2000 Advanced RISC Machines Ltd. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 3 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
| 16 | |
| 17 | #include "armdefs.h" |
| 18 | #include "armos.h" |
| 19 | #include "armemu.h" |
| 20 | #include "ansidecl.h" |
| 21 | #include "iwmmxt.h" |
| 22 | |
| 23 | /* Dummy Co-processors. */ |
| 24 | |
| 25 | static unsigned |
| 26 | NoCoPro3R (ARMul_State * state ATTRIBUTE_UNUSED, |
| 27 | unsigned a ATTRIBUTE_UNUSED, |
| 28 | ARMword b ATTRIBUTE_UNUSED) |
| 29 | { |
| 30 | return ARMul_CANT; |
| 31 | } |
| 32 | |
| 33 | static unsigned |
| 34 | NoCoPro4R (ARMul_State * state ATTRIBUTE_UNUSED, |
| 35 | unsigned a ATTRIBUTE_UNUSED, |
| 36 | ARMword b ATTRIBUTE_UNUSED, |
| 37 | ARMword c ATTRIBUTE_UNUSED) |
| 38 | { |
| 39 | return ARMul_CANT; |
| 40 | } |
| 41 | |
| 42 | static unsigned |
| 43 | NoCoPro4W (ARMul_State * state ATTRIBUTE_UNUSED, |
| 44 | unsigned a ATTRIBUTE_UNUSED, |
| 45 | ARMword b ATTRIBUTE_UNUSED, |
| 46 | ARMword * c ATTRIBUTE_UNUSED) |
| 47 | { |
| 48 | return ARMul_CANT; |
| 49 | } |
| 50 | |
| 51 | /* The XScale Co-processors. */ |
| 52 | |
| 53 | /* Coprocessor 15: System Control. */ |
| 54 | static void write_cp14_reg (unsigned, ARMword); |
| 55 | static ARMword read_cp14_reg (unsigned); |
| 56 | |
| 57 | /* There are two sets of registers for copro 15. |
| 58 | One set is available when opcode_2 is 0 and |
| 59 | the other set when opcode_2 >= 1. */ |
| 60 | static ARMword XScale_cp15_opcode_2_is_0_Regs[16]; |
| 61 | static ARMword XScale_cp15_opcode_2_is_not_0_Regs[16]; |
| 62 | /* There are also a set of breakpoint registers |
| 63 | which are accessed via CRm instead of opcode_2. */ |
| 64 | static ARMword XScale_cp15_DBR1; |
| 65 | static ARMword XScale_cp15_DBCON; |
| 66 | static ARMword XScale_cp15_IBCR0; |
| 67 | static ARMword XScale_cp15_IBCR1; |
| 68 | |
| 69 | static unsigned |
| 70 | XScale_cp15_init (ARMul_State * state ATTRIBUTE_UNUSED) |
| 71 | { |
| 72 | int i; |
| 73 | |
| 74 | for (i = 16; i--;) |
| 75 | { |
| 76 | XScale_cp15_opcode_2_is_0_Regs[i] = 0; |
| 77 | XScale_cp15_opcode_2_is_not_0_Regs[i] = 0; |
| 78 | } |
| 79 | |
| 80 | /* Initialise the processor ID. */ |
| 81 | XScale_cp15_opcode_2_is_0_Regs[0] = 0x69052000; |
| 82 | |
| 83 | /* Initialise the cache type. */ |
| 84 | XScale_cp15_opcode_2_is_not_0_Regs[0] = 0x0B1AA1AA; |
| 85 | |
| 86 | /* Initialise the ARM Control Register. */ |
| 87 | XScale_cp15_opcode_2_is_0_Regs[1] = 0x00000078; |
| 88 | |
| 89 | return TRUE; |
| 90 | } |
| 91 | |
| 92 | /* Check an access to a register. */ |
| 93 | |
| 94 | static unsigned |
| 95 | check_cp15_access (ARMul_State * state, |
| 96 | unsigned reg, |
| 97 | unsigned CRm, |
| 98 | unsigned opcode_1, |
| 99 | unsigned opcode_2) |
| 100 | { |
| 101 | /* Do not allow access to these register in USER mode. */ |
| 102 | if (state->Mode == USER26MODE || state->Mode == USER32MODE) |
| 103 | return ARMul_CANT; |
| 104 | |
| 105 | /* Opcode_1should be zero. */ |
| 106 | if (opcode_1 != 0) |
| 107 | return ARMul_CANT; |
| 108 | |
| 109 | /* Different register have different access requirements. */ |
| 110 | switch (reg) |
| 111 | { |
| 112 | case 0: |
| 113 | case 1: |
| 114 | /* CRm must be 0. Opcode_2 can be anything. */ |
| 115 | if (CRm != 0) |
| 116 | return ARMul_CANT; |
| 117 | break; |
| 118 | case 2: |
| 119 | case 3: |
| 120 | /* CRm must be 0. Opcode_2 must be zero. */ |
| 121 | if ((CRm != 0) || (opcode_2 != 0)) |
| 122 | return ARMul_CANT; |
| 123 | break; |
| 124 | case 4: |
| 125 | /* Access not allowed. */ |
| 126 | return ARMul_CANT; |
| 127 | case 5: |
| 128 | case 6: |
| 129 | /* Opcode_2 must be zero. CRm must be 0. */ |
| 130 | if ((CRm != 0) || (opcode_2 != 0)) |
| 131 | return ARMul_CANT; |
| 132 | break; |
| 133 | case 7: |
| 134 | /* Permissable combinations: |
| 135 | Opcode_2 CRm |
| 136 | 0 5 |
| 137 | 0 6 |
| 138 | 0 7 |
| 139 | 1 5 |
| 140 | 1 6 |
| 141 | 1 10 |
| 142 | 4 10 |
| 143 | 5 2 |
| 144 | 6 5 */ |
| 145 | switch (opcode_2) |
| 146 | { |
| 147 | default: return ARMul_CANT; |
| 148 | case 6: if (CRm != 5) return ARMul_CANT; break; |
| 149 | case 5: if (CRm != 2) return ARMul_CANT; break; |
| 150 | case 4: if (CRm != 10) return ARMul_CANT; break; |
| 151 | case 1: if ((CRm != 5) && (CRm != 6) && (CRm != 10)) return ARMul_CANT; break; |
| 152 | case 0: if ((CRm < 5) || (CRm > 7)) return ARMul_CANT; break; |
| 153 | } |
| 154 | break; |
| 155 | |
| 156 | case 8: |
| 157 | /* Permissable combinations: |
| 158 | Opcode_2 CRm |
| 159 | 0 5 |
| 160 | 0 6 |
| 161 | 0 7 |
| 162 | 1 5 |
| 163 | 1 6 */ |
| 164 | if (opcode_2 > 1) |
| 165 | return ARMul_CANT; |
| 166 | if ((CRm < 5) || (CRm > 7)) |
| 167 | return ARMul_CANT; |
| 168 | if (opcode_2 == 1 && CRm == 7) |
| 169 | return ARMul_CANT; |
| 170 | break; |
| 171 | case 9: |
| 172 | /* Opcode_2 must be zero or one. CRm must be 1 or 2. */ |
| 173 | if ( ((CRm != 0) && (CRm != 1)) |
| 174 | || ((opcode_2 != 1) && (opcode_2 != 2))) |
| 175 | return ARMul_CANT; |
| 176 | break; |
| 177 | case 10: |
| 178 | /* Opcode_2 must be zero or one. CRm must be 4 or 8. */ |
| 179 | if ( ((CRm != 0) && (CRm != 1)) |
| 180 | || ((opcode_2 != 4) && (opcode_2 != 8))) |
| 181 | return ARMul_CANT; |
| 182 | break; |
| 183 | case 11: |
| 184 | /* Access not allowed. */ |
| 185 | return ARMul_CANT; |
| 186 | case 12: |
| 187 | /* Access not allowed. */ |
| 188 | return ARMul_CANT; |
| 189 | case 13: |
| 190 | /* Opcode_2 must be zero. CRm must be 0. */ |
| 191 | if ((CRm != 0) || (opcode_2 != 0)) |
| 192 | return ARMul_CANT; |
| 193 | break; |
| 194 | case 14: |
| 195 | /* Opcode_2 must be 0. CRm must be 0, 3, 4, 8 or 9. */ |
| 196 | if (opcode_2 != 0) |
| 197 | return ARMul_CANT; |
| 198 | |
| 199 | if ((CRm != 0) && (CRm != 3) && (CRm != 4) && (CRm != 8) && (CRm != 9)) |
| 200 | return ARMul_CANT; |
| 201 | break; |
| 202 | case 15: |
| 203 | /* Opcode_2 must be zero. CRm must be 1. */ |
| 204 | if ((CRm != 1) || (opcode_2 != 0)) |
| 205 | return ARMul_CANT; |
| 206 | break; |
| 207 | default: |
| 208 | /* Should never happen. */ |
| 209 | return ARMul_CANT; |
| 210 | } |
| 211 | |
| 212 | return ARMul_DONE; |
| 213 | } |
| 214 | |
| 215 | /* Store a value into one of coprocessor 15's registers. */ |
| 216 | |
| 217 | static void |
| 218 | write_cp15_reg (ARMul_State * state, |
| 219 | unsigned reg, |
| 220 | unsigned opcode_2, |
| 221 | unsigned CRm, |
| 222 | ARMword value) |
| 223 | { |
| 224 | if (opcode_2) |
| 225 | { |
| 226 | switch (reg) |
| 227 | { |
| 228 | case 0: /* Cache Type. */ |
| 229 | /* Writes are not allowed. */ |
| 230 | return; |
| 231 | |
| 232 | case 1: /* Auxillary Control. */ |
| 233 | /* Only BITS (5, 4) and BITS (1, 0) can be written. */ |
| 234 | value &= 0x33; |
| 235 | break; |
| 236 | |
| 237 | default: |
| 238 | return; |
| 239 | } |
| 240 | |
| 241 | XScale_cp15_opcode_2_is_not_0_Regs [reg] = value; |
| 242 | } |
| 243 | else |
| 244 | { |
| 245 | switch (reg) |
| 246 | { |
| 247 | case 0: /* ID. */ |
| 248 | /* Writes are not allowed. */ |
| 249 | return; |
| 250 | |
| 251 | case 1: /* ARM Control. */ |
| 252 | /* Only BITS (13, 11), BITS (9, 7) and BITS (2, 0) can be written. |
| 253 | BITS (31, 14) and BIT (10) write as zero, BITS (6, 3) write as one. */ |
| 254 | value &= 0x00003b87; |
| 255 | value |= 0x00000078; |
| 256 | |
| 257 | /* Change the endianness if necessary. */ |
| 258 | if ((value & ARMul_CP15_R1_ENDIAN) != |
| 259 | (XScale_cp15_opcode_2_is_0_Regs [reg] & ARMul_CP15_R1_ENDIAN)) |
| 260 | { |
| 261 | state->bigendSig = value & ARMul_CP15_R1_ENDIAN; |
| 262 | /* Force ARMulator to notice these now. */ |
| 263 | state->Emulate = CHANGEMODE; |
| 264 | } |
| 265 | break; |
| 266 | |
| 267 | case 2: /* Translation Table Base. */ |
| 268 | /* Only BITS (31, 14) can be written. */ |
| 269 | value &= 0xffffc000; |
| 270 | break; |
| 271 | |
| 272 | case 3: /* Domain Access Control. */ |
| 273 | /* All bits writable. */ |
| 274 | break; |
| 275 | |
| 276 | case 5: /* Fault Status Register. */ |
| 277 | /* BITS (10, 9) and BITS (7, 0) can be written. */ |
| 278 | value &= 0x000006ff; |
| 279 | break; |
| 280 | |
| 281 | case 6: /* Fault Address Register. */ |
| 282 | /* All bits writable. */ |
| 283 | break; |
| 284 | |
| 285 | case 7: /* Cache Functions. */ |
| 286 | case 8: /* TLB Operations. */ |
| 287 | case 10: /* TLB Lock Down. */ |
| 288 | /* Ignore writes. */ |
| 289 | return; |
| 290 | |
| 291 | case 9: /* Data Cache Lock. */ |
| 292 | /* Only BIT (0) can be written. */ |
| 293 | value &= 0x1; |
| 294 | break; |
| 295 | |
| 296 | case 13: /* Process ID. */ |
| 297 | /* Only BITS (31, 25) are writable. */ |
| 298 | value &= 0xfe000000; |
| 299 | break; |
| 300 | |
| 301 | case 14: /* DBR0, DBR1, DBCON, IBCR0, IBCR1 */ |
| 302 | /* All bits can be written. Which register is accessed is |
| 303 | dependent upon CRm. */ |
| 304 | switch (CRm) |
| 305 | { |
| 306 | case 0: /* DBR0 */ |
| 307 | break; |
| 308 | case 3: /* DBR1 */ |
| 309 | XScale_cp15_DBR1 = value; |
| 310 | break; |
| 311 | case 4: /* DBCON */ |
| 312 | XScale_cp15_DBCON = value; |
| 313 | break; |
| 314 | case 8: /* IBCR0 */ |
| 315 | XScale_cp15_IBCR0 = value; |
| 316 | break; |
| 317 | case 9: /* IBCR1 */ |
| 318 | XScale_cp15_IBCR1 = value; |
| 319 | break; |
| 320 | default: |
| 321 | return; |
| 322 | } |
| 323 | break; |
| 324 | |
| 325 | case 15: /* Coprpcessor Access Register. */ |
| 326 | /* Access is only valid if CRm == 1. */ |
| 327 | if (CRm != 1) |
| 328 | return; |
| 329 | |
| 330 | /* Only BITS (13, 0) may be written. */ |
| 331 | value &= 0x00003fff; |
| 332 | break; |
| 333 | |
| 334 | default: |
| 335 | return; |
| 336 | } |
| 337 | |
| 338 | XScale_cp15_opcode_2_is_0_Regs [reg] = value; |
| 339 | } |
| 340 | |
| 341 | return; |
| 342 | } |
| 343 | |
| 344 | /* Return the value in a cp15 register. */ |
| 345 | |
| 346 | ARMword |
| 347 | read_cp15_reg (unsigned reg, unsigned opcode_2, unsigned CRm) |
| 348 | { |
| 349 | if (opcode_2 == 0) |
| 350 | { |
| 351 | if (reg == 15 && CRm != 1) |
| 352 | return 0; |
| 353 | |
| 354 | if (reg == 14) |
| 355 | { |
| 356 | switch (CRm) |
| 357 | { |
| 358 | case 3: return XScale_cp15_DBR1; |
| 359 | case 4: return XScale_cp15_DBCON; |
| 360 | case 8: return XScale_cp15_IBCR0; |
| 361 | case 9: return XScale_cp15_IBCR1; |
| 362 | default: |
| 363 | break; |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | return XScale_cp15_opcode_2_is_0_Regs [reg]; |
| 368 | } |
| 369 | else |
| 370 | return XScale_cp15_opcode_2_is_not_0_Regs [reg]; |
| 371 | |
| 372 | return 0; |
| 373 | } |
| 374 | |
| 375 | static unsigned |
| 376 | XScale_cp15_MRC (ARMul_State * state, |
| 377 | unsigned type ATTRIBUTE_UNUSED, |
| 378 | ARMword instr, |
| 379 | ARMword * value) |
| 380 | { |
| 381 | unsigned opcode_2 = BITS (5, 7); |
| 382 | unsigned CRm = BITS (0, 3); |
| 383 | unsigned reg = BITS (16, 19); |
| 384 | unsigned result; |
| 385 | |
| 386 | result = check_cp15_access (state, reg, CRm, BITS (21, 23), opcode_2); |
| 387 | |
| 388 | if (result == ARMul_DONE) |
| 389 | * value = read_cp15_reg (reg, opcode_2, CRm); |
| 390 | |
| 391 | return result; |
| 392 | } |
| 393 | |
| 394 | static unsigned |
| 395 | XScale_cp15_MCR (ARMul_State * state, |
| 396 | unsigned type ATTRIBUTE_UNUSED, |
| 397 | ARMword instr, |
| 398 | ARMword value) |
| 399 | { |
| 400 | unsigned opcode_2 = BITS (5, 7); |
| 401 | unsigned CRm = BITS (0, 3); |
| 402 | unsigned reg = BITS (16, 19); |
| 403 | unsigned result; |
| 404 | |
| 405 | result = check_cp15_access (state, reg, CRm, BITS (21, 23), opcode_2); |
| 406 | |
| 407 | if (result == ARMul_DONE) |
| 408 | write_cp15_reg (state, reg, opcode_2, CRm, value); |
| 409 | |
| 410 | return result; |
| 411 | } |
| 412 | |
| 413 | static unsigned |
| 414 | XScale_cp15_read_reg (ARMul_State * state ATTRIBUTE_UNUSED, |
| 415 | unsigned reg, |
| 416 | ARMword * value) |
| 417 | { |
| 418 | /* FIXME: Not sure what to do about the alternative register set |
| 419 | here. For now default to just accessing CRm == 0 registers. */ |
| 420 | * value = read_cp15_reg (reg, 0, 0); |
| 421 | |
| 422 | return TRUE; |
| 423 | } |
| 424 | |
| 425 | static unsigned |
| 426 | XScale_cp15_write_reg (ARMul_State * state ATTRIBUTE_UNUSED, |
| 427 | unsigned reg, |
| 428 | ARMword value) |
| 429 | { |
| 430 | /* FIXME: Not sure what to do about the alternative register set |
| 431 | here. For now default to just accessing CRm == 0 registers. */ |
| 432 | write_cp15_reg (state, reg, 0, 0, value); |
| 433 | |
| 434 | return TRUE; |
| 435 | } |
| 436 | |
| 437 | /* Check for special XScale memory access features. */ |
| 438 | |
| 439 | void |
| 440 | XScale_check_memacc (ARMul_State * state, ARMword * address, int store) |
| 441 | { |
| 442 | ARMword dbcon, r0, r1; |
| 443 | int e1, e0; |
| 444 | |
| 445 | if (!state->is_XScale) |
| 446 | return; |
| 447 | |
| 448 | /* Check for PID-ification. |
| 449 | XXX BTB access support will require this test failing. */ |
| 450 | r0 = (read_cp15_reg (13, 0, 0) & 0xfe000000); |
| 451 | if (r0 && (* address & 0xfe000000) == 0) |
| 452 | * address |= r0; |
| 453 | |
| 454 | /* Check alignment fault enable/disable. */ |
| 455 | if ((read_cp15_reg (1, 0, 0) & ARMul_CP15_R1_ALIGN) && (* address & 3)) |
| 456 | { |
| 457 | /* Set the FSR and FAR. |
| 458 | Do not use XScale_set_fsr_far as this checks the DCSR register. */ |
| 459 | write_cp15_reg (state, 5, 0, 0, ARMul_CP15_R5_MMU_EXCPT); |
| 460 | write_cp15_reg (state, 6, 0, 0, * address); |
| 461 | |
| 462 | ARMul_Abort (state, ARMul_DataAbortV); |
| 463 | } |
| 464 | |
| 465 | if (XScale_debug_moe (state, -1)) |
| 466 | return; |
| 467 | |
| 468 | /* Check the data breakpoint registers. */ |
| 469 | dbcon = read_cp15_reg (14, 0, 4); |
| 470 | r0 = read_cp15_reg (14, 0, 0); |
| 471 | r1 = read_cp15_reg (14, 0, 3); |
| 472 | e0 = dbcon & ARMul_CP15_DBCON_E0; |
| 473 | |
| 474 | if (dbcon & ARMul_CP15_DBCON_M) |
| 475 | { |
| 476 | /* r1 is a inverse mask. */ |
| 477 | if (e0 != 0 && ((store && e0 != 3) || (!store && e0 != 1)) |
| 478 | && ((* address & ~r1) == (r0 & ~r1))) |
| 479 | { |
| 480 | XScale_debug_moe (state, ARMul_CP14_R10_MOE_DB); |
| 481 | ARMul_OSHandleSWI (state, SWI_Breakpoint); |
| 482 | } |
| 483 | } |
| 484 | else |
| 485 | { |
| 486 | if (e0 != 0 && ((store && e0 != 3) || (!store && e0 != 1)) |
| 487 | && ((* address & ~3) == (r0 & ~3))) |
| 488 | { |
| 489 | XScale_debug_moe (state, ARMul_CP14_R10_MOE_DB); |
| 490 | ARMul_OSHandleSWI (state, SWI_Breakpoint); |
| 491 | } |
| 492 | |
| 493 | e1 = (dbcon & ARMul_CP15_DBCON_E1) >> 2; |
| 494 | if (e1 != 0 && ((store && e1 != 3) || (!store && e1 != 1)) |
| 495 | && ((* address & ~3) == (r1 & ~3))) |
| 496 | { |
| 497 | XScale_debug_moe (state, ARMul_CP14_R10_MOE_DB); |
| 498 | ARMul_OSHandleSWI (state, SWI_Breakpoint); |
| 499 | } |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | /* Set the XScale FSR and FAR registers. */ |
| 504 | |
| 505 | void |
| 506 | XScale_set_fsr_far (ARMul_State * state, ARMword fsr, ARMword far) |
| 507 | { |
| 508 | if (!state->is_XScale || (read_cp14_reg (10) & (1UL << 31)) == 0) |
| 509 | return; |
| 510 | |
| 511 | write_cp15_reg (state, 5, 0, 0, fsr); |
| 512 | write_cp15_reg (state, 6, 0, 0, far); |
| 513 | } |
| 514 | |
| 515 | /* Set the XScale debug `method of entry' if it is enabled. */ |
| 516 | |
| 517 | int |
| 518 | XScale_debug_moe (ARMul_State * state, int moe) |
| 519 | { |
| 520 | ARMword value; |
| 521 | |
| 522 | if (!state->is_XScale) |
| 523 | return 1; |
| 524 | |
| 525 | value = read_cp14_reg (10); |
| 526 | if (value & (1UL << 31)) |
| 527 | { |
| 528 | if (moe != -1) |
| 529 | { |
| 530 | value &= ~0x1c; |
| 531 | value |= moe; |
| 532 | |
| 533 | write_cp14_reg (10, value); |
| 534 | } |
| 535 | return 1; |
| 536 | } |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | /* Coprocessor 13: Interrupt Controller and Bus Controller. */ |
| 541 | |
| 542 | /* There are two sets of registers for copro 13. |
| 543 | One set (of three registers) is available when CRm is 0 |
| 544 | and the other set (of six registers) when CRm is 1. */ |
| 545 | |
| 546 | static ARMword XScale_cp13_CR0_Regs[16]; |
| 547 | static ARMword XScale_cp13_CR1_Regs[16]; |
| 548 | |
| 549 | static unsigned |
| 550 | XScale_cp13_init (ARMul_State * state ATTRIBUTE_UNUSED) |
| 551 | { |
| 552 | int i; |
| 553 | |
| 554 | for (i = 16; i--;) |
| 555 | { |
| 556 | XScale_cp13_CR0_Regs[i] = 0; |
| 557 | XScale_cp13_CR1_Regs[i] = 0; |
| 558 | } |
| 559 | |
| 560 | return TRUE; |
| 561 | } |
| 562 | |
| 563 | /* Check an access to a register. */ |
| 564 | |
| 565 | static unsigned |
| 566 | check_cp13_access (ARMul_State * state, |
| 567 | unsigned reg, |
| 568 | unsigned CRm, |
| 569 | unsigned opcode_1, |
| 570 | unsigned opcode_2) |
| 571 | { |
| 572 | /* Do not allow access to these registers in USER mode. */ |
| 573 | if (state->Mode == USER26MODE || state->Mode == USER32MODE) |
| 574 | return ARMul_CANT; |
| 575 | |
| 576 | /* The opcodes should be zero. */ |
| 577 | if ((opcode_1 != 0) || (opcode_2 != 0)) |
| 578 | return ARMul_CANT; |
| 579 | |
| 580 | /* Do not allow access to these register if bit |
| 581 | 13 of coprocessor 15's register 15 is zero. */ |
| 582 | if (! CP_ACCESS_ALLOWED (state, 13)) |
| 583 | return ARMul_CANT; |
| 584 | |
| 585 | /* Registers 0, 4 and 8 are defined when CRm == 0. |
| 586 | Registers 0, 1, 4, 5, 6, 7, 8 are defined when CRm == 1. |
| 587 | For all other CRm values undefined behaviour results. */ |
| 588 | if (CRm == 0) |
| 589 | { |
| 590 | if (reg == 0 || reg == 4 || reg == 8) |
| 591 | return ARMul_DONE; |
| 592 | } |
| 593 | else if (CRm == 1) |
| 594 | { |
| 595 | if (reg == 0 || reg == 1 || (reg >= 4 && reg <= 8)) |
| 596 | return ARMul_DONE; |
| 597 | } |
| 598 | |
| 599 | return ARMul_CANT; |
| 600 | } |
| 601 | |
| 602 | /* Store a value into one of coprocessor 13's registers. */ |
| 603 | |
| 604 | static void |
| 605 | write_cp13_reg (unsigned reg, unsigned CRm, ARMword value) |
| 606 | { |
| 607 | switch (CRm) |
| 608 | { |
| 609 | case 0: |
| 610 | switch (reg) |
| 611 | { |
| 612 | case 0: /* INTCTL */ |
| 613 | /* Only BITS (3:0) can be written. */ |
| 614 | value &= 0xf; |
| 615 | break; |
| 616 | |
| 617 | case 4: /* INTSRC */ |
| 618 | /* No bits may be written. */ |
| 619 | return; |
| 620 | |
| 621 | case 8: /* INTSTR */ |
| 622 | /* Only BITS (1:0) can be written. */ |
| 623 | value &= 0x3; |
| 624 | break; |
| 625 | |
| 626 | default: |
| 627 | /* Should not happen. Ignore any writes to unimplemented registers. */ |
| 628 | return; |
| 629 | } |
| 630 | |
| 631 | XScale_cp13_CR0_Regs [reg] = value; |
| 632 | break; |
| 633 | |
| 634 | case 1: |
| 635 | switch (reg) |
| 636 | { |
| 637 | case 0: /* BCUCTL */ |
| 638 | /* Only BITS (30:28) and BITS (3:0) can be written. |
| 639 | BIT(31) is write ignored. */ |
| 640 | value &= 0x7000000f; |
| 641 | value |= XScale_cp13_CR1_Regs[0] & (1UL << 31); |
| 642 | break; |
| 643 | |
| 644 | case 1: /* BCUMOD */ |
| 645 | /* Only bit 0 is accecssible. */ |
| 646 | value &= 1; |
| 647 | value |= XScale_cp13_CR1_Regs[1] & ~ 1; |
| 648 | break; |
| 649 | |
| 650 | case 4: /* ELOG0 */ |
| 651 | case 5: /* ELOG1 */ |
| 652 | case 6: /* ECAR0 */ |
| 653 | case 7: /* ECAR1 */ |
| 654 | /* No bits can be written. */ |
| 655 | return; |
| 656 | |
| 657 | case 8: /* ECTST */ |
| 658 | /* Only BITS (7:0) can be written. */ |
| 659 | value &= 0xff; |
| 660 | break; |
| 661 | |
| 662 | default: |
| 663 | /* Should not happen. Ignore any writes to unimplemented registers. */ |
| 664 | return; |
| 665 | } |
| 666 | |
| 667 | XScale_cp13_CR1_Regs [reg] = value; |
| 668 | break; |
| 669 | |
| 670 | default: |
| 671 | /* Should not happen. */ |
| 672 | break; |
| 673 | } |
| 674 | |
| 675 | return; |
| 676 | } |
| 677 | |
| 678 | /* Return the value in a cp13 register. */ |
| 679 | |
| 680 | static ARMword |
| 681 | read_cp13_reg (unsigned reg, unsigned CRm) |
| 682 | { |
| 683 | if (CRm == 0) |
| 684 | return XScale_cp13_CR0_Regs [reg]; |
| 685 | else if (CRm == 1) |
| 686 | return XScale_cp13_CR1_Regs [reg]; |
| 687 | |
| 688 | return 0; |
| 689 | } |
| 690 | |
| 691 | static unsigned |
| 692 | XScale_cp13_LDC (ARMul_State * state, unsigned type, ARMword instr, ARMword data) |
| 693 | { |
| 694 | unsigned reg = BITS (12, 15); |
| 695 | unsigned result; |
| 696 | |
| 697 | result = check_cp13_access (state, reg, 0, 0, 0); |
| 698 | |
| 699 | if (result == ARMul_DONE && type == ARMul_DATA) |
| 700 | write_cp13_reg (reg, 0, data); |
| 701 | |
| 702 | return result; |
| 703 | } |
| 704 | |
| 705 | static unsigned |
| 706 | XScale_cp13_STC (ARMul_State * state, unsigned type, ARMword instr, ARMword * data) |
| 707 | { |
| 708 | unsigned reg = BITS (12, 15); |
| 709 | unsigned result; |
| 710 | |
| 711 | result = check_cp13_access (state, reg, 0, 0, 0); |
| 712 | |
| 713 | if (result == ARMul_DONE && type == ARMul_DATA) |
| 714 | * data = read_cp13_reg (reg, 0); |
| 715 | |
| 716 | return result; |
| 717 | } |
| 718 | |
| 719 | static unsigned |
| 720 | XScale_cp13_MRC (ARMul_State * state, |
| 721 | unsigned type ATTRIBUTE_UNUSED, |
| 722 | ARMword instr, |
| 723 | ARMword * value) |
| 724 | { |
| 725 | unsigned CRm = BITS (0, 3); |
| 726 | unsigned reg = BITS (16, 19); |
| 727 | unsigned result; |
| 728 | |
| 729 | result = check_cp13_access (state, reg, CRm, BITS (21, 23), BITS (5, 7)); |
| 730 | |
| 731 | if (result == ARMul_DONE) |
| 732 | * value = read_cp13_reg (reg, CRm); |
| 733 | |
| 734 | return result; |
| 735 | } |
| 736 | |
| 737 | static unsigned |
| 738 | XScale_cp13_MCR (ARMul_State * state, |
| 739 | unsigned type ATTRIBUTE_UNUSED, |
| 740 | ARMword instr, |
| 741 | ARMword value) |
| 742 | { |
| 743 | unsigned CRm = BITS (0, 3); |
| 744 | unsigned reg = BITS (16, 19); |
| 745 | unsigned result; |
| 746 | |
| 747 | result = check_cp13_access (state, reg, CRm, BITS (21, 23), BITS (5, 7)); |
| 748 | |
| 749 | if (result == ARMul_DONE) |
| 750 | write_cp13_reg (reg, CRm, value); |
| 751 | |
| 752 | return result; |
| 753 | } |
| 754 | |
| 755 | static unsigned |
| 756 | XScale_cp13_read_reg (ARMul_State * state ATTRIBUTE_UNUSED, |
| 757 | unsigned reg, |
| 758 | ARMword * value) |
| 759 | { |
| 760 | /* FIXME: Not sure what to do about the alternative register set |
| 761 | here. For now default to just accessing CRm == 0 registers. */ |
| 762 | * value = read_cp13_reg (reg, 0); |
| 763 | |
| 764 | return TRUE; |
| 765 | } |
| 766 | |
| 767 | static unsigned |
| 768 | XScale_cp13_write_reg (ARMul_State * state ATTRIBUTE_UNUSED, |
| 769 | unsigned reg, |
| 770 | ARMword value) |
| 771 | { |
| 772 | /* FIXME: Not sure what to do about the alternative register set |
| 773 | here. For now default to just accessing CRm == 0 registers. */ |
| 774 | write_cp13_reg (reg, 0, value); |
| 775 | |
| 776 | return TRUE; |
| 777 | } |
| 778 | |
| 779 | /* Coprocessor 14: Performance Monitoring, Clock and Power management, |
| 780 | Software Debug. */ |
| 781 | |
| 782 | static ARMword XScale_cp14_Regs[16]; |
| 783 | |
| 784 | static unsigned |
| 785 | XScale_cp14_init (ARMul_State * state ATTRIBUTE_UNUSED) |
| 786 | { |
| 787 | int i; |
| 788 | |
| 789 | for (i = 16; i--;) |
| 790 | XScale_cp14_Regs[i] = 0; |
| 791 | |
| 792 | return TRUE; |
| 793 | } |
| 794 | |
| 795 | /* Check an access to a register. */ |
| 796 | |
| 797 | static unsigned |
| 798 | check_cp14_access (ARMul_State * state, |
| 799 | unsigned reg, |
| 800 | unsigned CRm, |
| 801 | unsigned opcode1, |
| 802 | unsigned opcode2) |
| 803 | { |
| 804 | /* Not allowed to access these register in USER mode. */ |
| 805 | if (state->Mode == USER26MODE || state->Mode == USER32MODE) |
| 806 | return ARMul_CANT; |
| 807 | |
| 808 | /* CRm should be zero. */ |
| 809 | if (CRm != 0) |
| 810 | return ARMul_CANT; |
| 811 | |
| 812 | /* OPcodes should be zero. */ |
| 813 | if (opcode1 != 0 || opcode2 != 0) |
| 814 | return ARMul_CANT; |
| 815 | |
| 816 | /* Accessing registers 4 or 5 has unpredicatable results. */ |
| 817 | if (reg >= 4 && reg <= 5) |
| 818 | return ARMul_CANT; |
| 819 | |
| 820 | return ARMul_DONE; |
| 821 | } |
| 822 | |
| 823 | /* Store a value into one of coprocessor 14's registers. */ |
| 824 | |
| 825 | static void |
| 826 | write_cp14_reg (unsigned reg, ARMword value) |
| 827 | { |
| 828 | switch (reg) |
| 829 | { |
| 830 | case 0: /* PMNC */ |
| 831 | /* Only BITS (27:12), BITS (10:8) and BITS (6:0) can be written. */ |
| 832 | value &= 0x0ffff77f; |
| 833 | |
| 834 | /* Reset the clock counter if necessary. */ |
| 835 | if (value & ARMul_CP14_R0_CLKRST) |
| 836 | XScale_cp14_Regs [1] = 0; |
| 837 | break; |
| 838 | |
| 839 | case 4: |
| 840 | case 5: |
| 841 | /* We should not normally reach this code. The debugger interface |
| 842 | can bypass the normal checks though, so it could happen. */ |
| 843 | value = 0; |
| 844 | break; |
| 845 | |
| 846 | case 6: /* CCLKCFG */ |
| 847 | /* Only BITS (3:0) can be written. */ |
| 848 | value &= 0xf; |
| 849 | break; |
| 850 | |
| 851 | case 7: /* PWRMODE */ |
| 852 | /* Although BITS (1:0) can be written with non-zero values, this would |
| 853 | have the side effect of putting the processor to sleep. Thus in |
| 854 | order for the register to be read again, it would have to go into |
| 855 | ACTIVE mode, which means that any read will see these bits as zero. |
| 856 | |
| 857 | Rather than trying to implement complex reset-to-zero-upon-read logic |
| 858 | we just override the write value with zero. */ |
| 859 | value = 0; |
| 860 | break; |
| 861 | |
| 862 | case 10: /* DCSR */ |
| 863 | /* Only BITS (31:30), BITS (23:22), BITS (20:16) and BITS (5:0) can |
| 864 | be written. */ |
| 865 | value &= 0xc0df003f; |
| 866 | break; |
| 867 | |
| 868 | case 11: /* TBREG */ |
| 869 | /* No writes are permitted. */ |
| 870 | value = 0; |
| 871 | break; |
| 872 | |
| 873 | case 14: /* TXRXCTRL */ |
| 874 | /* Only BITS (31:30) can be written. */ |
| 875 | value &= 0xc0000000; |
| 876 | break; |
| 877 | |
| 878 | default: |
| 879 | /* All bits can be written. */ |
| 880 | break; |
| 881 | } |
| 882 | |
| 883 | XScale_cp14_Regs [reg] = value; |
| 884 | } |
| 885 | |
| 886 | /* Return the value in a cp14 register. Not a static function since |
| 887 | it is used by the code to emulate the BKPT instruction in armemu.c. */ |
| 888 | |
| 889 | ARMword |
| 890 | read_cp14_reg (unsigned reg) |
| 891 | { |
| 892 | return XScale_cp14_Regs [reg]; |
| 893 | } |
| 894 | |
| 895 | static unsigned |
| 896 | XScale_cp14_LDC (ARMul_State * state, unsigned type, ARMword instr, ARMword data) |
| 897 | { |
| 898 | unsigned reg = BITS (12, 15); |
| 899 | unsigned result; |
| 900 | |
| 901 | result = check_cp14_access (state, reg, 0, 0, 0); |
| 902 | |
| 903 | if (result == ARMul_DONE && type == ARMul_DATA) |
| 904 | write_cp14_reg (reg, data); |
| 905 | |
| 906 | return result; |
| 907 | } |
| 908 | |
| 909 | static unsigned |
| 910 | XScale_cp14_STC (ARMul_State * state, unsigned type, ARMword instr, ARMword * data) |
| 911 | { |
| 912 | unsigned reg = BITS (12, 15); |
| 913 | unsigned result; |
| 914 | |
| 915 | result = check_cp14_access (state, reg, 0, 0, 0); |
| 916 | |
| 917 | if (result == ARMul_DONE && type == ARMul_DATA) |
| 918 | * data = read_cp14_reg (reg); |
| 919 | |
| 920 | return result; |
| 921 | } |
| 922 | |
| 923 | static unsigned |
| 924 | XScale_cp14_MRC |
| 925 | ( |
| 926 | ARMul_State * state, |
| 927 | unsigned type ATTRIBUTE_UNUSED, |
| 928 | ARMword instr, |
| 929 | ARMword * value |
| 930 | ) |
| 931 | { |
| 932 | unsigned reg = BITS (16, 19); |
| 933 | unsigned result; |
| 934 | |
| 935 | result = check_cp14_access (state, reg, BITS (0, 3), BITS (21, 23), BITS (5, 7)); |
| 936 | |
| 937 | if (result == ARMul_DONE) |
| 938 | * value = read_cp14_reg (reg); |
| 939 | |
| 940 | return result; |
| 941 | } |
| 942 | |
| 943 | static unsigned |
| 944 | XScale_cp14_MCR |
| 945 | ( |
| 946 | ARMul_State * state, |
| 947 | unsigned type ATTRIBUTE_UNUSED, |
| 948 | ARMword instr, |
| 949 | ARMword value |
| 950 | ) |
| 951 | { |
| 952 | unsigned reg = BITS (16, 19); |
| 953 | unsigned result; |
| 954 | |
| 955 | result = check_cp14_access (state, reg, BITS (0, 3), BITS (21, 23), BITS (5, 7)); |
| 956 | |
| 957 | if (result == ARMul_DONE) |
| 958 | write_cp14_reg (reg, value); |
| 959 | |
| 960 | return result; |
| 961 | } |
| 962 | |
| 963 | static unsigned |
| 964 | XScale_cp14_read_reg |
| 965 | ( |
| 966 | ARMul_State * state ATTRIBUTE_UNUSED, |
| 967 | unsigned reg, |
| 968 | ARMword * value |
| 969 | ) |
| 970 | { |
| 971 | * value = read_cp14_reg (reg); |
| 972 | |
| 973 | return TRUE; |
| 974 | } |
| 975 | |
| 976 | static unsigned |
| 977 | XScale_cp14_write_reg |
| 978 | ( |
| 979 | ARMul_State * state ATTRIBUTE_UNUSED, |
| 980 | unsigned reg, |
| 981 | ARMword value |
| 982 | ) |
| 983 | { |
| 984 | write_cp14_reg (reg, value); |
| 985 | |
| 986 | return TRUE; |
| 987 | } |
| 988 | |
| 989 | /* Here's ARMulator's MMU definition. A few things to note: |
| 990 | 1) It has eight registers, but only two are defined. |
| 991 | 2) You can only access its registers with MCR and MRC. |
| 992 | 3) MMU Register 0 (ID) returns 0x41440110 |
| 993 | 4) Register 1 only has 4 bits defined. Bits 0 to 3 are unused, bit 4 |
| 994 | controls 32/26 bit program space, bit 5 controls 32/26 bit data space, |
| 995 | bit 6 controls late abort timimg and bit 7 controls big/little endian. */ |
| 996 | |
| 997 | static ARMword MMUReg[8]; |
| 998 | |
| 999 | static unsigned |
| 1000 | MMUInit (ARMul_State * state) |
| 1001 | { |
| 1002 | MMUReg[1] = state->prog32Sig << 4 | |
| 1003 | state->data32Sig << 5 | state->lateabtSig << 6 | state->bigendSig << 7; |
| 1004 | |
| 1005 | ARMul_ConsolePrint (state, ", MMU present"); |
| 1006 | |
| 1007 | return TRUE; |
| 1008 | } |
| 1009 | |
| 1010 | static unsigned |
| 1011 | MMUMRC (ARMul_State * state ATTRIBUTE_UNUSED, |
| 1012 | unsigned type ATTRIBUTE_UNUSED, |
| 1013 | ARMword instr, |
| 1014 | ARMword * value) |
| 1015 | { |
| 1016 | int reg = BITS (16, 19) & 7; |
| 1017 | |
| 1018 | if (reg == 0) |
| 1019 | *value = 0x41440110; |
| 1020 | else |
| 1021 | *value = MMUReg[reg]; |
| 1022 | |
| 1023 | return ARMul_DONE; |
| 1024 | } |
| 1025 | |
| 1026 | static unsigned |
| 1027 | MMUMCR (ARMul_State * state, |
| 1028 | unsigned type ATTRIBUTE_UNUSED, |
| 1029 | ARMword instr, |
| 1030 | ARMword value) |
| 1031 | { |
| 1032 | int reg = BITS (16, 19) & 7; |
| 1033 | |
| 1034 | MMUReg[reg] = value; |
| 1035 | |
| 1036 | if (reg == 1) |
| 1037 | { |
| 1038 | ARMword p,d,l,b; |
| 1039 | |
| 1040 | p = state->prog32Sig; |
| 1041 | d = state->data32Sig; |
| 1042 | l = state->lateabtSig; |
| 1043 | b = state->bigendSig; |
| 1044 | |
| 1045 | state->prog32Sig = value >> 4 & 1; |
| 1046 | state->data32Sig = value >> 5 & 1; |
| 1047 | state->lateabtSig = value >> 6 & 1; |
| 1048 | state->bigendSig = value >> 7 & 1; |
| 1049 | |
| 1050 | if ( p != state->prog32Sig |
| 1051 | || d != state->data32Sig |
| 1052 | || l != state->lateabtSig |
| 1053 | || b != state->bigendSig) |
| 1054 | /* Force ARMulator to notice these now. */ |
| 1055 | state->Emulate = CHANGEMODE; |
| 1056 | } |
| 1057 | |
| 1058 | return ARMul_DONE; |
| 1059 | } |
| 1060 | |
| 1061 | static unsigned |
| 1062 | MMURead (ARMul_State * state ATTRIBUTE_UNUSED, unsigned reg, ARMword * value) |
| 1063 | { |
| 1064 | if (reg == 0) |
| 1065 | *value = 0x41440110; |
| 1066 | else if (reg < 8) |
| 1067 | *value = MMUReg[reg]; |
| 1068 | |
| 1069 | return TRUE; |
| 1070 | } |
| 1071 | |
| 1072 | static unsigned |
| 1073 | MMUWrite (ARMul_State * state, unsigned reg, ARMword value) |
| 1074 | { |
| 1075 | if (reg < 8) |
| 1076 | MMUReg[reg] = value; |
| 1077 | |
| 1078 | if (reg == 1) |
| 1079 | { |
| 1080 | ARMword p,d,l,b; |
| 1081 | |
| 1082 | p = state->prog32Sig; |
| 1083 | d = state->data32Sig; |
| 1084 | l = state->lateabtSig; |
| 1085 | b = state->bigendSig; |
| 1086 | |
| 1087 | state->prog32Sig = value >> 4 & 1; |
| 1088 | state->data32Sig = value >> 5 & 1; |
| 1089 | state->lateabtSig = value >> 6 & 1; |
| 1090 | state->bigendSig = value >> 7 & 1; |
| 1091 | |
| 1092 | if ( p != state->prog32Sig |
| 1093 | || d != state->data32Sig |
| 1094 | || l != state->lateabtSig |
| 1095 | || b != state->bigendSig) |
| 1096 | /* Force ARMulator to notice these now. */ |
| 1097 | state->Emulate = CHANGEMODE; |
| 1098 | } |
| 1099 | |
| 1100 | return TRUE; |
| 1101 | } |
| 1102 | |
| 1103 | |
| 1104 | /* What follows is the Validation Suite Coprocessor. It uses two |
| 1105 | co-processor numbers (4 and 5) and has the follwing functionality. |
| 1106 | Sixteen registers. Both co-processor nuimbers can be used in an MCR |
| 1107 | and MRC to access these registers. CP 4 can LDC and STC to and from |
| 1108 | the registers. CP 4 and CP 5 CDP 0 will busy wait for the number of |
| 1109 | cycles specified by a CP register. CP 5 CDP 1 issues a FIQ after a |
| 1110 | number of cycles (specified in a CP register), CDP 2 issues an IRQW |
| 1111 | in the same way, CDP 3 and 4 turn of the FIQ and IRQ source, and CDP 5 |
| 1112 | stores a 32 bit time value in a CP register (actually it's the total |
| 1113 | number of N, S, I, C and F cyles). */ |
| 1114 | |
| 1115 | static ARMword ValReg[16]; |
| 1116 | |
| 1117 | static unsigned |
| 1118 | ValLDC (ARMul_State * state ATTRIBUTE_UNUSED, |
| 1119 | unsigned type, |
| 1120 | ARMword instr, |
| 1121 | ARMword data) |
| 1122 | { |
| 1123 | static unsigned words; |
| 1124 | |
| 1125 | if (type != ARMul_DATA) |
| 1126 | words = 0; |
| 1127 | else |
| 1128 | { |
| 1129 | ValReg[BITS (12, 15)] = data; |
| 1130 | |
| 1131 | if (BIT (22)) |
| 1132 | /* It's a long access, get two words. */ |
| 1133 | if (words++ != 4) |
| 1134 | return ARMul_INC; |
| 1135 | } |
| 1136 | |
| 1137 | return ARMul_DONE; |
| 1138 | } |
| 1139 | |
| 1140 | static unsigned |
| 1141 | ValSTC (ARMul_State * state ATTRIBUTE_UNUSED, |
| 1142 | unsigned type, |
| 1143 | ARMword instr, |
| 1144 | ARMword * data) |
| 1145 | { |
| 1146 | static unsigned words; |
| 1147 | |
| 1148 | if (type != ARMul_DATA) |
| 1149 | words = 0; |
| 1150 | else |
| 1151 | { |
| 1152 | * data = ValReg[BITS (12, 15)]; |
| 1153 | |
| 1154 | if (BIT (22)) |
| 1155 | /* It's a long access, get two words. */ |
| 1156 | if (words++ != 4) |
| 1157 | return ARMul_INC; |
| 1158 | } |
| 1159 | |
| 1160 | return ARMul_DONE; |
| 1161 | } |
| 1162 | |
| 1163 | static unsigned |
| 1164 | ValMRC (ARMul_State * state ATTRIBUTE_UNUSED, |
| 1165 | unsigned type ATTRIBUTE_UNUSED, |
| 1166 | ARMword instr, |
| 1167 | ARMword * value) |
| 1168 | { |
| 1169 | *value = ValReg[BITS (16, 19)]; |
| 1170 | |
| 1171 | return ARMul_DONE; |
| 1172 | } |
| 1173 | |
| 1174 | static unsigned |
| 1175 | ValMCR (ARMul_State * state ATTRIBUTE_UNUSED, |
| 1176 | unsigned type ATTRIBUTE_UNUSED, |
| 1177 | ARMword instr, |
| 1178 | ARMword value) |
| 1179 | { |
| 1180 | ValReg[BITS (16, 19)] = value; |
| 1181 | |
| 1182 | return ARMul_DONE; |
| 1183 | } |
| 1184 | |
| 1185 | static unsigned |
| 1186 | ValCDP (ARMul_State * state, unsigned type, ARMword instr) |
| 1187 | { |
| 1188 | static unsigned long finish = 0; |
| 1189 | |
| 1190 | if (BITS (20, 23) != 0) |
| 1191 | return ARMul_CANT; |
| 1192 | |
| 1193 | if (type == ARMul_FIRST) |
| 1194 | { |
| 1195 | ARMword howlong; |
| 1196 | |
| 1197 | howlong = ValReg[BITS (0, 3)]; |
| 1198 | |
| 1199 | /* First cycle of a busy wait. */ |
| 1200 | finish = ARMul_Time (state) + howlong; |
| 1201 | |
| 1202 | return howlong == 0 ? ARMul_DONE : ARMul_BUSY; |
| 1203 | } |
| 1204 | else if (type == ARMul_BUSY) |
| 1205 | { |
| 1206 | if (ARMul_Time (state) >= finish) |
| 1207 | return ARMul_DONE; |
| 1208 | else |
| 1209 | return ARMul_BUSY; |
| 1210 | } |
| 1211 | |
| 1212 | return ARMul_CANT; |
| 1213 | } |
| 1214 | |
| 1215 | static unsigned |
| 1216 | DoAFIQ (ARMul_State * state) |
| 1217 | { |
| 1218 | state->NfiqSig = LOW; |
| 1219 | state->Exception++; |
| 1220 | return 0; |
| 1221 | } |
| 1222 | |
| 1223 | static unsigned |
| 1224 | DoAIRQ (ARMul_State * state) |
| 1225 | { |
| 1226 | state->NirqSig = LOW; |
| 1227 | state->Exception++; |
| 1228 | return 0; |
| 1229 | } |
| 1230 | |
| 1231 | static unsigned |
| 1232 | IntCDP (ARMul_State * state, unsigned type, ARMword instr) |
| 1233 | { |
| 1234 | static unsigned long finish; |
| 1235 | ARMword howlong; |
| 1236 | |
| 1237 | howlong = ValReg[BITS (0, 3)]; |
| 1238 | |
| 1239 | switch ((int) BITS (20, 23)) |
| 1240 | { |
| 1241 | case 0: |
| 1242 | if (type == ARMul_FIRST) |
| 1243 | { |
| 1244 | /* First cycle of a busy wait. */ |
| 1245 | finish = ARMul_Time (state) + howlong; |
| 1246 | |
| 1247 | return howlong == 0 ? ARMul_DONE : ARMul_BUSY; |
| 1248 | } |
| 1249 | else if (type == ARMul_BUSY) |
| 1250 | { |
| 1251 | if (ARMul_Time (state) >= finish) |
| 1252 | return ARMul_DONE; |
| 1253 | else |
| 1254 | return ARMul_BUSY; |
| 1255 | } |
| 1256 | return ARMul_DONE; |
| 1257 | |
| 1258 | case 1: |
| 1259 | if (howlong == 0) |
| 1260 | ARMul_Abort (state, ARMul_FIQV); |
| 1261 | else |
| 1262 | ARMul_ScheduleEvent (state, howlong, DoAFIQ); |
| 1263 | return ARMul_DONE; |
| 1264 | |
| 1265 | case 2: |
| 1266 | if (howlong == 0) |
| 1267 | ARMul_Abort (state, ARMul_IRQV); |
| 1268 | else |
| 1269 | ARMul_ScheduleEvent (state, howlong, DoAIRQ); |
| 1270 | return ARMul_DONE; |
| 1271 | |
| 1272 | case 3: |
| 1273 | state->NfiqSig = HIGH; |
| 1274 | state->Exception--; |
| 1275 | return ARMul_DONE; |
| 1276 | |
| 1277 | case 4: |
| 1278 | state->NirqSig = HIGH; |
| 1279 | state->Exception--; |
| 1280 | return ARMul_DONE; |
| 1281 | |
| 1282 | case 5: |
| 1283 | ValReg[BITS (0, 3)] = ARMul_Time (state); |
| 1284 | return ARMul_DONE; |
| 1285 | } |
| 1286 | |
| 1287 | return ARMul_CANT; |
| 1288 | } |
| 1289 | |
| 1290 | /* Install co-processor instruction handlers in this routine. */ |
| 1291 | |
| 1292 | unsigned |
| 1293 | ARMul_CoProInit (ARMul_State * state) |
| 1294 | { |
| 1295 | unsigned int i; |
| 1296 | |
| 1297 | /* Initialise tham all first. */ |
| 1298 | for (i = 0; i < 16; i++) |
| 1299 | ARMul_CoProDetach (state, i); |
| 1300 | |
| 1301 | /* Install CoPro Instruction handlers here. |
| 1302 | The format is: |
| 1303 | ARMul_CoProAttach (state, CP Number, Init routine, Exit routine |
| 1304 | LDC routine, STC routine, MRC routine, MCR routine, |
| 1305 | CDP routine, Read Reg routine, Write Reg routine). */ |
| 1306 | if (state->is_ep9312) |
| 1307 | { |
| 1308 | ARMul_CoProAttach (state, 4, NULL, NULL, DSPLDC4, DSPSTC4, |
| 1309 | DSPMRC4, DSPMCR4, DSPCDP4, NULL, NULL); |
| 1310 | ARMul_CoProAttach (state, 5, NULL, NULL, DSPLDC5, DSPSTC5, |
| 1311 | DSPMRC5, DSPMCR5, DSPCDP5, NULL, NULL); |
| 1312 | ARMul_CoProAttach (state, 6, NULL, NULL, NULL, NULL, |
| 1313 | DSPMRC6, DSPMCR6, DSPCDP6, NULL, NULL); |
| 1314 | } |
| 1315 | else |
| 1316 | { |
| 1317 | ARMul_CoProAttach (state, 4, NULL, NULL, ValLDC, ValSTC, |
| 1318 | ValMRC, ValMCR, ValCDP, NULL, NULL); |
| 1319 | |
| 1320 | ARMul_CoProAttach (state, 5, NULL, NULL, NULL, NULL, |
| 1321 | ValMRC, ValMCR, IntCDP, NULL, NULL); |
| 1322 | } |
| 1323 | |
| 1324 | if (state->is_XScale) |
| 1325 | { |
| 1326 | ARMul_CoProAttach (state, 13, XScale_cp13_init, NULL, |
| 1327 | XScale_cp13_LDC, XScale_cp13_STC, XScale_cp13_MRC, |
| 1328 | XScale_cp13_MCR, NULL, XScale_cp13_read_reg, |
| 1329 | XScale_cp13_write_reg); |
| 1330 | |
| 1331 | ARMul_CoProAttach (state, 14, XScale_cp14_init, NULL, |
| 1332 | XScale_cp14_LDC, XScale_cp14_STC, XScale_cp14_MRC, |
| 1333 | XScale_cp14_MCR, NULL, XScale_cp14_read_reg, |
| 1334 | XScale_cp14_write_reg); |
| 1335 | |
| 1336 | ARMul_CoProAttach (state, 15, XScale_cp15_init, NULL, |
| 1337 | NULL, NULL, XScale_cp15_MRC, XScale_cp15_MCR, |
| 1338 | NULL, XScale_cp15_read_reg, XScale_cp15_write_reg); |
| 1339 | } |
| 1340 | else |
| 1341 | { |
| 1342 | ARMul_CoProAttach (state, 15, MMUInit, NULL, NULL, NULL, |
| 1343 | MMUMRC, MMUMCR, NULL, MMURead, MMUWrite); |
| 1344 | } |
| 1345 | |
| 1346 | if (state->is_iWMMXt) |
| 1347 | { |
| 1348 | ARMul_CoProAttach (state, 0, NULL, NULL, IwmmxtLDC, IwmmxtSTC, |
| 1349 | NULL, NULL, IwmmxtCDP, NULL, NULL); |
| 1350 | |
| 1351 | ARMul_CoProAttach (state, 1, NULL, NULL, NULL, NULL, |
| 1352 | IwmmxtMRC, IwmmxtMCR, IwmmxtCDP, NULL, NULL); |
| 1353 | } |
| 1354 | |
| 1355 | /* No handlers below here. */ |
| 1356 | |
| 1357 | /* Call all the initialisation routines. */ |
| 1358 | for (i = 0; i < 16; i++) |
| 1359 | if (state->CPInit[i]) |
| 1360 | (state->CPInit[i]) (state); |
| 1361 | |
| 1362 | return TRUE; |
| 1363 | } |
| 1364 | |
| 1365 | /* Install co-processor finalisation routines in this routine. */ |
| 1366 | |
| 1367 | void |
| 1368 | ARMul_CoProExit (ARMul_State * state) |
| 1369 | { |
| 1370 | register unsigned i; |
| 1371 | |
| 1372 | for (i = 0; i < 16; i++) |
| 1373 | if (state->CPExit[i]) |
| 1374 | (state->CPExit[i]) (state); |
| 1375 | |
| 1376 | for (i = 0; i < 16; i++) /* Detach all handlers. */ |
| 1377 | ARMul_CoProDetach (state, i); |
| 1378 | } |
| 1379 | |
| 1380 | /* Routines to hook Co-processors into ARMulator. */ |
| 1381 | |
| 1382 | void |
| 1383 | ARMul_CoProAttach (ARMul_State * state, |
| 1384 | unsigned number, |
| 1385 | ARMul_CPInits * init, |
| 1386 | ARMul_CPExits * exit, |
| 1387 | ARMul_LDCs * ldc, |
| 1388 | ARMul_STCs * stc, |
| 1389 | ARMul_MRCs * mrc, |
| 1390 | ARMul_MCRs * mcr, |
| 1391 | ARMul_CDPs * cdp, |
| 1392 | ARMul_CPReads * read, |
| 1393 | ARMul_CPWrites * write) |
| 1394 | { |
| 1395 | if (init != NULL) |
| 1396 | state->CPInit[number] = init; |
| 1397 | if (exit != NULL) |
| 1398 | state->CPExit[number] = exit; |
| 1399 | if (ldc != NULL) |
| 1400 | state->LDC[number] = ldc; |
| 1401 | if (stc != NULL) |
| 1402 | state->STC[number] = stc; |
| 1403 | if (mrc != NULL) |
| 1404 | state->MRC[number] = mrc; |
| 1405 | if (mcr != NULL) |
| 1406 | state->MCR[number] = mcr; |
| 1407 | if (cdp != NULL) |
| 1408 | state->CDP[number] = cdp; |
| 1409 | if (read != NULL) |
| 1410 | state->CPRead[number] = read; |
| 1411 | if (write != NULL) |
| 1412 | state->CPWrite[number] = write; |
| 1413 | } |
| 1414 | |
| 1415 | void |
| 1416 | ARMul_CoProDetach (ARMul_State * state, unsigned number) |
| 1417 | { |
| 1418 | ARMul_CoProAttach (state, number, NULL, NULL, |
| 1419 | NoCoPro4R, NoCoPro4W, NoCoPro4W, NoCoPro4R, |
| 1420 | NoCoPro3R, NULL, NULL); |
| 1421 | |
| 1422 | state->CPInit[number] = NULL; |
| 1423 | state->CPExit[number] = NULL; |
| 1424 | state->CPRead[number] = NULL; |
| 1425 | state->CPWrite[number] = NULL; |
| 1426 | } |