| 1 | /*************************************************************************** |
| 2 | * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team * |
| 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 2 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, write to the * |
| 16 | * Free Software Foundation, Inc., * |
| 17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. * |
| 18 | ***************************************************************************/ |
| 19 | |
| 20 | /* |
| 21 | * PSX memory functions. |
| 22 | */ |
| 23 | |
| 24 | // TODO: Implement caches & cycle penalty. |
| 25 | |
| 26 | #include "psxmem.h" |
| 27 | #include "psxmem_map.h" |
| 28 | #include "r3000a.h" |
| 29 | #include "psxhw.h" |
| 30 | #include "debug.h" |
| 31 | |
| 32 | #include "memmap.h" |
| 33 | |
| 34 | #ifdef USE_LIBRETRO_VFS |
| 35 | #include <streams/file_stream_transforms.h> |
| 36 | #endif |
| 37 | |
| 38 | #ifndef MAP_ANONYMOUS |
| 39 | #define MAP_ANONYMOUS MAP_ANON |
| 40 | #endif |
| 41 | |
| 42 | boolean writeok = TRUE; |
| 43 | |
| 44 | #ifndef NDEBUG |
| 45 | #include "debug.h" |
| 46 | #else |
| 47 | void DebugCheckBP(u32 address, enum breakpoint_types type) {} |
| 48 | #endif |
| 49 | |
| 50 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
| 51 | enum psxMapTag tag); |
| 52 | void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag); |
| 53 | |
| 54 | void *psxMap(unsigned long addr, size_t size, int is_fixed, |
| 55 | enum psxMapTag tag) |
| 56 | { |
| 57 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
| 58 | int try_ = 0; |
| 59 | unsigned long mask; |
| 60 | void *req, *ret; |
| 61 | |
| 62 | retry: |
| 63 | if (psxMapHook != NULL) { |
| 64 | ret = psxMapHook(addr, size, 0, tag); |
| 65 | if (ret == NULL) |
| 66 | return NULL; |
| 67 | } |
| 68 | else { |
| 69 | /* avoid MAP_FIXED, it overrides existing mappings.. */ |
| 70 | /* if (is_fixed) |
| 71 | flags |= MAP_FIXED; */ |
| 72 | |
| 73 | req = (void *)addr; |
| 74 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); |
| 75 | if (ret == MAP_FAILED) |
| 76 | return NULL; |
| 77 | } |
| 78 | |
| 79 | if (addr != 0 && ret != (void *)addr) { |
| 80 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", |
| 81 | addr, ret); |
| 82 | |
| 83 | if (is_fixed) { |
| 84 | psxUnmap(ret, size, tag); |
| 85 | return NULL; |
| 86 | } |
| 87 | |
| 88 | if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2) |
| 89 | { |
| 90 | psxUnmap(ret, size, tag); |
| 91 | |
| 92 | // try to use similarly aligned memory instead |
| 93 | // (recompiler needs this) |
| 94 | mask = try_ ? 0xffff : 0xffffff; |
| 95 | addr = ((unsigned long)ret + mask) & ~mask; |
| 96 | try_++; |
| 97 | goto retry; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | return ret; |
| 102 | } |
| 103 | |
| 104 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) |
| 105 | { |
| 106 | if (psxUnmapHook != NULL) { |
| 107 | psxUnmapHook(ptr, size, tag); |
| 108 | return; |
| 109 | } |
| 110 | |
| 111 | if (ptr) |
| 112 | munmap(ptr, size); |
| 113 | } |
| 114 | |
| 115 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) |
| 116 | s8 *psxP = NULL; // Parallel Port (64K) |
| 117 | s8 *psxR = NULL; // BIOS ROM (512K) |
| 118 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) |
| 119 | |
| 120 | u8 **psxMemWLUT = NULL; |
| 121 | u8 **psxMemRLUT = NULL; |
| 122 | |
| 123 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) |
| 124 | 0x0000_0000-0x0000_ffff Kernel (64K) |
| 125 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) |
| 126 | |
| 127 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) |
| 128 | |
| 129 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) |
| 130 | |
| 131 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) |
| 132 | |
| 133 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) |
| 134 | |
| 135 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached |
| 136 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached |
| 137 | |
| 138 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached |
| 139 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached |
| 140 | */ |
| 141 | |
| 142 | int psxMemInit() { |
| 143 | int i; |
| 144 | |
| 145 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); |
| 146 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); |
| 147 | memset(psxMemRLUT, 0, 0x10000 * sizeof(void *)); |
| 148 | memset(psxMemWLUT, 0, 0x10000 * sizeof(void *)); |
| 149 | |
| 150 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
| 151 | if (psxM == NULL) |
| 152 | psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM); |
| 153 | if (psxM == NULL) { |
| 154 | SysMessage(_("mapping main RAM failed")); |
| 155 | return -1; |
| 156 | } |
| 157 | |
| 158 | psxP = &psxM[0x200000]; |
| 159 | psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER); |
| 160 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); |
| 161 | |
| 162 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || |
| 163 | psxR == NULL || psxP == NULL || psxH == NULL) { |
| 164 | SysMessage(_("Error allocating memory!")); |
| 165 | psxMemShutdown(); |
| 166 | return -1; |
| 167 | } |
| 168 | |
| 169 | // MemR |
| 170 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; |
| 171 | |
| 172 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); |
| 173 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); |
| 174 | |
| 175 | psxMemRLUT[0x1f00] = (u8 *)psxP; |
| 176 | psxMemRLUT[0x1f80] = (u8 *)psxH; |
| 177 | |
| 178 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; |
| 179 | |
| 180 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); |
| 181 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); |
| 182 | |
| 183 | // MemW |
| 184 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; |
| 185 | |
| 186 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); |
| 187 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); |
| 188 | |
| 189 | // Don't allow writes to PIO Expansion region (psxP) to take effect. |
| 190 | // NOTE: Not sure if this is needed to fix any games but seems wise, |
| 191 | // seeing as some games do read from PIO as part of copy-protection |
| 192 | // check. (See fix in psxMemReset() regarding psxP region reads). |
| 193 | psxMemWLUT[0x1f00] = NULL; |
| 194 | psxMemWLUT[0x1f80] = (u8 *)psxH; |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
| 199 | void psxMemReset() { |
| 200 | FILE *f = NULL; |
| 201 | char bios[1024]; |
| 202 | |
| 203 | memset(psxM, 0, 0x00200000); |
| 204 | memset(psxP, 0xff, 0x00010000); |
| 205 | |
| 206 | Config.HLE = TRUE; |
| 207 | |
| 208 | if (strcmp(Config.Bios, "HLE") != 0) { |
| 209 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); |
| 210 | f = fopen(bios, "rb"); |
| 211 | |
| 212 | if (f == NULL) { |
| 213 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); |
| 214 | memset(psxR, 0, 0x80000); |
| 215 | } else { |
| 216 | if (fread(psxR, 1, 0x80000, f) == 0x80000) { |
| 217 | Config.HLE = FALSE; |
| 218 | } else { |
| 219 | SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios); |
| 220 | } |
| 221 | fclose(f); |
| 222 | } |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | void psxMemShutdown() { |
| 227 | psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL; |
| 228 | psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL; |
| 229 | psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL; |
| 230 | |
| 231 | free(psxMemRLUT); psxMemRLUT = NULL; |
| 232 | free(psxMemWLUT); psxMemWLUT = NULL; |
| 233 | } |
| 234 | |
| 235 | u8 psxMemRead8(u32 mem) { |
| 236 | char *p; |
| 237 | u32 t; |
| 238 | |
| 239 | t = mem >> 16; |
| 240 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
| 241 | if ((mem & 0xffff) < 0x400) |
| 242 | return psxHu8(mem); |
| 243 | else |
| 244 | return psxHwRead8(mem); |
| 245 | } else { |
| 246 | p = (char *)(psxMemRLUT[t]); |
| 247 | if (p != NULL) { |
| 248 | if (Config.Debug) |
| 249 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); |
| 250 | return *(u8 *)(p + (mem & 0xffff)); |
| 251 | } else { |
| 252 | #ifdef PSXMEM_LOG |
| 253 | PSXMEM_LOG("err lb %8.8lx\n", mem); |
| 254 | #endif |
| 255 | return 0xFF; |
| 256 | } |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | u16 psxMemRead16(u32 mem) { |
| 261 | char *p; |
| 262 | u32 t; |
| 263 | |
| 264 | t = mem >> 16; |
| 265 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
| 266 | if ((mem & 0xffff) < 0x400) |
| 267 | return psxHu16(mem); |
| 268 | else |
| 269 | return psxHwRead16(mem); |
| 270 | } else { |
| 271 | p = (char *)(psxMemRLUT[t]); |
| 272 | if (p != NULL) { |
| 273 | if (Config.Debug) |
| 274 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); |
| 275 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); |
| 276 | } else { |
| 277 | #ifdef PSXMEM_LOG |
| 278 | PSXMEM_LOG("err lh %8.8lx\n", mem); |
| 279 | #endif |
| 280 | return 0xFFFF; |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | u32 psxMemRead32(u32 mem) { |
| 286 | char *p; |
| 287 | u32 t; |
| 288 | |
| 289 | t = mem >> 16; |
| 290 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
| 291 | if ((mem & 0xffff) < 0x400) |
| 292 | return psxHu32(mem); |
| 293 | else |
| 294 | return psxHwRead32(mem); |
| 295 | } else { |
| 296 | p = (char *)(psxMemRLUT[t]); |
| 297 | if (p != NULL) { |
| 298 | if (Config.Debug) |
| 299 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); |
| 300 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); |
| 301 | } else { |
| 302 | #ifdef PSXMEM_LOG |
| 303 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } |
| 304 | #endif |
| 305 | return 0xFFFFFFFF; |
| 306 | } |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | void psxMemWrite8(u32 mem, u8 value) { |
| 311 | char *p; |
| 312 | u32 t; |
| 313 | |
| 314 | t = mem >> 16; |
| 315 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
| 316 | if ((mem & 0xffff) < 0x400) |
| 317 | psxHu8(mem) = value; |
| 318 | else |
| 319 | psxHwWrite8(mem, value); |
| 320 | } else { |
| 321 | p = (char *)(psxMemWLUT[t]); |
| 322 | if (p != NULL) { |
| 323 | if (Config.Debug) |
| 324 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); |
| 325 | *(u8 *)(p + (mem & 0xffff)) = value; |
| 326 | #ifndef DRC_DISABLE |
| 327 | psxCpu->Clear((mem & (~3)), 1); |
| 328 | #endif |
| 329 | } else { |
| 330 | #ifdef PSXMEM_LOG |
| 331 | PSXMEM_LOG("err sb %8.8lx\n", mem); |
| 332 | #endif |
| 333 | } |
| 334 | } |
| 335 | } |
| 336 | |
| 337 | void psxMemWrite16(u32 mem, u16 value) { |
| 338 | char *p; |
| 339 | u32 t; |
| 340 | |
| 341 | t = mem >> 16; |
| 342 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
| 343 | if ((mem & 0xffff) < 0x400) |
| 344 | psxHu16ref(mem) = SWAPu16(value); |
| 345 | else |
| 346 | psxHwWrite16(mem, value); |
| 347 | } else { |
| 348 | p = (char *)(psxMemWLUT[t]); |
| 349 | if (p != NULL) { |
| 350 | if (Config.Debug) |
| 351 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); |
| 352 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); |
| 353 | #ifndef DRC_DISABLE |
| 354 | psxCpu->Clear((mem & (~3)), 1); |
| 355 | #endif |
| 356 | } else { |
| 357 | #ifdef PSXMEM_LOG |
| 358 | PSXMEM_LOG("err sh %8.8lx\n", mem); |
| 359 | #endif |
| 360 | } |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | void psxMemWrite32(u32 mem, u32 value) { |
| 365 | char *p; |
| 366 | u32 t; |
| 367 | |
| 368 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); |
| 369 | t = mem >> 16; |
| 370 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
| 371 | if ((mem & 0xffff) < 0x400) |
| 372 | psxHu32ref(mem) = SWAPu32(value); |
| 373 | else |
| 374 | psxHwWrite32(mem, value); |
| 375 | } else { |
| 376 | p = (char *)(psxMemWLUT[t]); |
| 377 | if (p != NULL) { |
| 378 | if (Config.Debug) |
| 379 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); |
| 380 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); |
| 381 | #ifndef DRC_DISABLE |
| 382 | psxCpu->Clear(mem, 1); |
| 383 | #endif |
| 384 | } else { |
| 385 | if (mem != 0xfffe0130) { |
| 386 | #ifndef DRC_DISABLE |
| 387 | if (!writeok) |
| 388 | psxCpu->Clear(mem, 1); |
| 389 | #endif |
| 390 | |
| 391 | #ifdef PSXMEM_LOG |
| 392 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } |
| 393 | #endif |
| 394 | } else { |
| 395 | int i; |
| 396 | |
| 397 | switch (value) { |
| 398 | case 0x800: case 0x804: |
| 399 | if (writeok == 0) break; |
| 400 | writeok = 0; |
| 401 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); |
| 402 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); |
| 403 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); |
| 404 | /* Required for icache interpreter otherwise Armored Core won't boot on icache interpreter */ |
| 405 | psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_ISOLATED, NULL); |
| 406 | break; |
| 407 | case 0x00: case 0x1e988: |
| 408 | if (writeok == 1) break; |
| 409 | writeok = 1; |
| 410 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; |
| 411 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); |
| 412 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); |
| 413 | /* Dynarecs might take this opportunity to flush their code cache */ |
| 414 | psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL); |
| 415 | break; |
| 416 | default: |
| 417 | #ifdef PSXMEM_LOG |
| 418 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); |
| 419 | #endif |
| 420 | break; |
| 421 | } |
| 422 | } |
| 423 | } |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | void *psxMemPointer(u32 mem) { |
| 428 | char *p; |
| 429 | u32 t; |
| 430 | |
| 431 | t = mem >> 16; |
| 432 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
| 433 | if ((mem & 0xffff) < 0x400) |
| 434 | return (void *)&psxH[mem]; |
| 435 | else |
| 436 | return NULL; |
| 437 | } else { |
| 438 | p = (char *)(psxMemWLUT[t]); |
| 439 | if (p != NULL) { |
| 440 | return (void *)(p + (mem & 0xffff)); |
| 441 | } |
| 442 | return NULL; |
| 443 | } |
| 444 | } |