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