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 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 }