libpcsxcore/psxmem.c

   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 MAP_FAILED;
  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 ret;
  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 MAP_FAILED;
  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         psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
 146         if (psxM == MAP_FAILED)
 147                 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
 148         if (psxM == MAP_FAILED) {
 149                 SysMessage(_("mapping main RAM failed"));
 150                 return -1;
 151         }
 152
 153         psxP = &psxM[0x200000];
 154         psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
 155         psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
 156
 157         if (psxR == MAP_FAILED || psxH == MAP_FAILED) {
 158                 SysMessage(_("Error allocating memory!"));
 159                 psxMemShutdown();
 160                 return -1;
 161         }
 162
 163         psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 164         psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 165
 166         if (psxMemRLUT == NULL || psxMemWLUT == NULL) {
 167                 SysMessage(_("Error allocating memory!"));
 168                 psxMemShutdown();
 169                 return -1;
 170         }
 171
 172         memset(psxMemRLUT, 0xff, 0x10000 * sizeof(void *));
 173         memset(psxMemWLUT, 0xff, 0x10000 * sizeof(void *));
 174
 175 // MemR
 176         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 177
 178         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
 179         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
 180
 181         psxMemRLUT[0x1f00] = (u8 *)psxP;
 182         psxMemRLUT[0x1f80] = (u8 *)psxH;
 183
 184         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
 185
 186         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 187         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 188
 189 // MemW
 190         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 191
 192         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 193         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 194
 195         // Don't allow writes to PIO Expansion region (psxP) to take effect.
 196         // NOTE: Not sure if this is needed to fix any games but seems wise,
 197         //       seeing as some games do read from PIO as part of copy-protection
 198         //       check. (See fix in psxMemReset() regarding psxP region reads).
 199         psxMemWLUT[0x1f00] = INVALID_PTR;
 200         psxMemWLUT[0x1f80] = (u8 *)psxH;
 201
 202         return 0;
 203 }
 204
 205 void psxMemReset() {
 206         FILE *f = NULL;
 207         char bios[1024];
 208
 209         memset(psxM, 0, 0x00200000);
 210         memset(psxP, 0xff, 0x00010000);
 211
 212         Config.HLE = TRUE;
 213
 214         if (strcmp(Config.Bios, "HLE") != 0) {
 215                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 216                 f = fopen(bios, "rb");
 217
 218                 if (f == NULL) {
 219                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 220                         memset(psxR, 0, 0x80000);
 221                 } else {
 222                         if (fread(psxR, 1, 0x80000, f) == 0x80000) {
 223                                 Config.HLE = FALSE;
 224                         } else {
 225                                 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
 226                         }
 227                         fclose(f);
 228                 }
 229         }
 230 }
 231
 232 void psxMemShutdown() {
 233         psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
 234         psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
 235         psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
 236
 237         free(psxMemRLUT); psxMemRLUT = NULL;
 238         free(psxMemWLUT); psxMemWLUT = NULL;
 239 }
 240
 241 u8 psxMemRead8(u32 mem) {
 242         char *p;
 243         u32 t;
 244
 245         t = mem >> 16;
 246         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 247                 if ((mem & 0xffff) < 0x400)
 248                         return psxHu8(mem);
 249                 else
 250                         return psxHwRead8(mem);
 251         } else {
 252                 p = (char *)(psxMemRLUT[t]);
 253                 if (p != INVALID_PTR) {
 254                         if (Config.Debug)
 255                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 256                         return *(u8 *)(p + (mem & 0xffff));
 257                 } else {
 258 #ifdef PSXMEM_LOG
 259                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 260 #endif
 261                         return 0xFF;
 262                 }
 263         }
 264 }
 265
 266 u16 psxMemRead16(u32 mem) {
 267         char *p;
 268         u32 t;
 269
 270         t = mem >> 16;
 271         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 272                 if ((mem & 0xffff) < 0x400)
 273                         return psxHu16(mem);
 274                 else
 275                         return psxHwRead16(mem);
 276         } else {
 277                 p = (char *)(psxMemRLUT[t]);
 278                 if (p != INVALID_PTR) {
 279                         if (Config.Debug)
 280                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 281                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 282                 } else {
 283 #ifdef PSXMEM_LOG
 284                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 285 #endif
 286                         return 0xFFFF;
 287                 }
 288         }
 289 }
 290
 291 u32 psxMemRead32(u32 mem) {
 292         char *p;
 293         u32 t;
 294
 295         t = mem >> 16;
 296         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 297                 if ((mem & 0xffff) < 0x400)
 298                         return psxHu32(mem);
 299                 else
 300                         return psxHwRead32(mem);
 301         } else {
 302                 p = (char *)(psxMemRLUT[t]);
 303                 if (p != INVALID_PTR) {
 304                         if (Config.Debug)
 305                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 306                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 307                 } else {
 308 #ifdef PSXMEM_LOG
 309                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 310 #endif
 311                         return 0xFFFFFFFF;
 312                 }
 313         }
 314 }
 315
 316 void psxMemWrite8(u32 mem, u8 value) {
 317         char *p;
 318         u32 t;
 319
 320         t = mem >> 16;
 321         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 322                 if ((mem & 0xffff) < 0x400)
 323                         psxHu8(mem) = value;
 324                 else
 325                         psxHwWrite8(mem, value);
 326         } else {
 327                 p = (char *)(psxMemWLUT[t]);
 328                 if (p != INVALID_PTR) {
 329                         if (Config.Debug)
 330                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 331                         *(u8 *)(p + (mem & 0xffff)) = value;
 332 #ifndef DRC_DISABLE
 333                         psxCpu->Clear((mem & (~3)), 1);
 334 #endif
 335                 } else {
 336 #ifdef PSXMEM_LOG
 337                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 338 #endif
 339                 }
 340         }
 341 }
 342
 343 void psxMemWrite16(u32 mem, u16 value) {
 344         char *p;
 345         u32 t;
 346
 347         t = mem >> 16;
 348         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 349                 if ((mem & 0xffff) < 0x400)
 350                         psxHu16ref(mem) = SWAPu16(value);
 351                 else
 352                         psxHwWrite16(mem, value);
 353         } else {
 354                 p = (char *)(psxMemWLUT[t]);
 355                 if (p != INVALID_PTR) {
 356                         if (Config.Debug)
 357                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 358                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 359 #ifndef DRC_DISABLE
 360                         psxCpu->Clear((mem & (~3)), 1);
 361 #endif
 362                 } else {
 363 #ifdef PSXMEM_LOG
 364                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 365 #endif
 366                 }
 367         }
 368 }
 369
 370 void psxMemWrite32(u32 mem, u32 value) {
 371         char *p;
 372         u32 t;
 373
 374 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 375         t = mem >> 16;
 376         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 377                 if ((mem & 0xffff) < 0x400)
 378                         psxHu32ref(mem) = SWAPu32(value);
 379                 else
 380                         psxHwWrite32(mem, value);
 381         } else {
 382                 p = (char *)(psxMemWLUT[t]);
 383                 if (p != INVALID_PTR) {
 384                         if (Config.Debug)
 385                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 386                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 387 #ifndef DRC_DISABLE
 388                         psxCpu->Clear(mem, 1);
 389 #endif
 390                 } else {
 391                         if (mem != 0xfffe0130) {
 392 #ifndef DRC_DISABLE
 393                                 if (!writeok)
 394                                         psxCpu->Clear(mem, 1);
 395 #endif
 396
 397 #ifdef PSXMEM_LOG
 398                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 399 #endif
 400                         } else {
 401                                 int i;
 402
 403                                 switch (value) {
 404                                         case 0x800: case 0x804:
 405                                                 if (writeok == 0) break;
 406                                                 writeok = 0;
 407                                                 memset(psxMemWLUT + 0x0000, 0xff, 0x80 * sizeof(void *));
 408                                                 memset(psxMemWLUT + 0x8000, 0xff, 0x80 * sizeof(void *));
 409                                                 memset(psxMemWLUT + 0xa000, 0xff, 0x80 * sizeof(void *));
 410                                                 /* Required for icache interpreter otherwise Armored Core won't boot on icache interpreter */
 411                                                 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_ISOLATED, NULL);
 412                                                 break;
 413                                         case 0x00: case 0x1e988:
 414                                                 if (writeok == 1) break;
 415                                                 writeok = 1;
 416                                                 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 417                                                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 418                                                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 419                                                 /* Dynarecs might take this opportunity to flush their code cache */
 420                                                 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
 421                                                 break;
 422                                         default:
 423 #ifdef PSXMEM_LOG
 424                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 425 #endif
 426                                                 break;
 427                                 }
 428                         }
 429                 }
 430         }
 431 }
 432
 433 void *psxMemPointer(u32 mem) {
 434         char *p;
 435         u32 t;
 436
 437         t = mem >> 16;
 438         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 439                 if ((mem & 0xffff) < 0x400)
 440                         return (void *)&psxH[mem];
 441                 else
 442                         return NULL;
 443         } else {
 444                 p = (char *)(psxMemWLUT[t]);
 445                 if (p != INVALID_PTR) {
 446                         return (void *)(p + (mem & 0xffff));
 447                 }
 448                 return NULL;
 449         }
 450 }