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 #ifndef MAP_ANONYMOUS
  35 #define MAP_ANONYMOUS MAP_ANON
  36 #endif
  37
  38 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
  39                 enum psxMapTag tag);
  40 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
  41
  42 void *psxMap(unsigned long addr, size_t size, int is_fixed,
  43                 enum psxMapTag tag)
  44 {
  45         int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  46         int tried_to_align = 0;
  47         unsigned long mask;
  48         void *req, *ret;
  49
  50 retry:
  51         if (psxMapHook != NULL) {
  52                 ret = psxMapHook(addr, size, is_fixed, tag);
  53                 goto out;
  54         }
  55
  56         /* avoid MAP_FIXED, it overrides existing mappings.. */
  57         /* if (is_fixed)
  58                 flags |= MAP_FIXED; */
  59
  60         req = (void *)addr;
  61         ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  62         if (ret == MAP_FAILED)
  63                 return NULL;
  64
  65 out:
  66         if (addr != 0 && ret != (void *)addr) {
  67                 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
  68                         addr, ret);
  69
  70                 if (is_fixed) {
  71                         psxUnmap(ret, size, tag);
  72                         return NULL;
  73                 }
  74
  75                 if (ret != NULL && ((addr ^ (long)ret) & 0x00ffffff)
  76                     && !tried_to_align)
  77                 {
  78                         psxUnmap(ret, size, tag);
  79
  80                         // try to use similarly aligned memory instead
  81                         // (recompiler needs this)
  82                         mask = (addr - 1) & ~addr & 0x07ffffff;
  83                         addr = (unsigned long)(ret + mask) & ~mask;
  84                         tried_to_align = 1;
  85                         goto retry;
  86                 }
  87         }
  88
  89         return ret;
  90 }
  91
  92 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
  93 {
  94         if (psxUnmapHook != NULL) {
  95                 psxUnmapHook(ptr, size, tag);
  96                 return;
  97         }
  98
  99         if (ptr)
 100                 munmap(ptr, size);
 101 }
 102
 103 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
 104 s8 *psxP = NULL; // Parallel Port (64K)
 105 s8 *psxR = NULL; // BIOS ROM (512K)
 106 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
 107
 108 u8 **psxMemWLUT = NULL;
 109 u8 **psxMemRLUT = NULL;
 110
 111 /*  Playstation Memory Map (from Playstation doc by Joshua Walker)
 112 0x0000_0000-0x0000_ffff         Kernel (64K)
 113 0x0001_0000-0x001f_ffff         User Memory (1.9 Meg)
 114
 115 0x1f00_0000-0x1f00_ffff         Parallel Port (64K)
 116
 117 0x1f80_0000-0x1f80_03ff         Scratch Pad (1024 bytes)
 118
 119 0x1f80_1000-0x1f80_2fff         Hardware Registers (8K)
 120
 121 0x1fc0_0000-0x1fc7_ffff         BIOS (512K)
 122
 123 0x8000_0000-0x801f_ffff         Kernel and User Memory Mirror (2 Meg) Cached
 124 0x9fc0_0000-0x9fc7_ffff         BIOS Mirror (512K) Cached
 125
 126 0xa000_0000-0xa01f_ffff         Kernel and User Memory Mirror (2 Meg) Uncached
 127 0xbfc0_0000-0xbfc7_ffff         BIOS Mirror (512K) Uncached
 128 */
 129
 130 int psxMemInit() {
 131         int i;
 132
 133         psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 134         psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 135         memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
 136         memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
 137
 138         psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
 139 #ifndef RAM_FIXED
 140 #ifdef __BLACKBERRY_QNX__
 141         if (psxM == NULL)
 142                 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
 143 #else
 144         if (psxM == NULL)
 145                 psxM = psxMap(0x78000000, 0x00210000, 0, MAP_TAG_RAM);
 146 #endif
 147 #endif
 148         if (psxM == NULL) {
 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 (psxMemRLUT == NULL || psxMemWLUT == NULL ||
 158             psxR == NULL || psxP == NULL || psxH == NULL) {
 159                 SysMessage(_("Error allocating memory!"));
 160                 psxMemShutdown();
 161                 return -1;
 162         }
 163
 164 // MemR
 165         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 166
 167         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
 168         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
 169
 170         psxMemRLUT[0x1f00] = (u8 *)psxP;
 171         psxMemRLUT[0x1f80] = (u8 *)psxH;
 172
 173         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
 174
 175         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 176         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 177
 178 // MemW
 179         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 180
 181         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 182         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 183
 184         psxMemWLUT[0x1f00] = (u8 *)psxP;
 185         psxMemWLUT[0x1f80] = (u8 *)psxH;
 186
 187         return 0;
 188 }
 189
 190 void psxMemReset() {
 191         FILE *f = NULL;
 192         char bios[1024];
 193
 194         memset(psxM, 0, 0x00200000);
 195         memset(psxP, 0, 0x00010000);
 196
 197         if (strcmp(Config.Bios, "HLE") != 0) {
 198                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 199                 f = fopen(bios, "rb");
 200
 201                 if (f == NULL) {
 202                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 203                         memset(psxR, 0, 0x80000);
 204                         Config.HLE = TRUE;
 205                 } else {
 206                         fread(psxR, 1, 0x80000, f);
 207                         fclose(f);
 208                         Config.HLE = FALSE;
 209                 }
 210         } else Config.HLE = TRUE;
 211 }
 212
 213 void psxMemShutdown() {
 214         psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
 215         psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
 216         psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
 217
 218         free(psxMemRLUT); psxMemRLUT = NULL;
 219         free(psxMemWLUT); psxMemWLUT = NULL;
 220 }
 221
 222 static int writeok = 1;
 223
 224 u8 psxMemRead8(u32 mem) {
 225         char *p;
 226         u32 t;
 227
 228         t = mem >> 16;
 229         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 230                 if ((mem & 0xffff) < 0x400)
 231                         return psxHu8(mem);
 232                 else
 233                         return psxHwRead8(mem);
 234         } else {
 235                 p = (char *)(psxMemRLUT[t]);
 236                 if (p != NULL) {
 237                         if (Config.Debug)
 238                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 239                         return *(u8 *)(p + (mem & 0xffff));
 240                 } else {
 241 #ifdef PSXMEM_LOG
 242                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 243 #endif
 244                         return 0;
 245                 }
 246         }
 247 }
 248
 249 u16 psxMemRead16(u32 mem) {
 250         char *p;
 251         u32 t;
 252
 253         t = mem >> 16;
 254         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 255                 if ((mem & 0xffff) < 0x400)
 256                         return psxHu16(mem);
 257                 else
 258                         return psxHwRead16(mem);
 259         } else {
 260                 p = (char *)(psxMemRLUT[t]);
 261                 if (p != NULL) {
 262                         if (Config.Debug)
 263                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 264                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 265                 } else {
 266 #ifdef PSXMEM_LOG
 267                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 268 #endif
 269                         return 0;
 270                 }
 271         }
 272 }
 273
 274 u32 psxMemRead32(u32 mem) {
 275         char *p;
 276         u32 t;
 277
 278         t = mem >> 16;
 279         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 280                 if ((mem & 0xffff) < 0x400)
 281                         return psxHu32(mem);
 282                 else
 283                         return psxHwRead32(mem);
 284         } else {
 285                 p = (char *)(psxMemRLUT[t]);
 286                 if (p != NULL) {
 287                         if (Config.Debug)
 288                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 289                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 290                 } else {
 291 #ifdef PSXMEM_LOG
 292                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 293 #endif
 294                         return 0;
 295                 }
 296         }
 297 }
 298
 299 void psxMemWrite8(u32 mem, u8 value) {
 300         char *p;
 301         u32 t;
 302
 303         t = mem >> 16;
 304         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 305                 if ((mem & 0xffff) < 0x400)
 306                         psxHu8(mem) = value;
 307                 else
 308                         psxHwWrite8(mem, value);
 309         } else {
 310                 p = (char *)(psxMemWLUT[t]);
 311                 if (p != NULL) {
 312                         if (Config.Debug)
 313                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 314                         *(u8 *)(p + (mem & 0xffff)) = value;
 315 #ifdef PSXREC
 316                         psxCpu->Clear((mem & (~3)), 1);
 317 #endif
 318                 } else {
 319 #ifdef PSXMEM_LOG
 320                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 321 #endif
 322                 }
 323         }
 324 }
 325
 326 void psxMemWrite16(u32 mem, u16 value) {
 327         char *p;
 328         u32 t;
 329
 330         t = mem >> 16;
 331         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 332                 if ((mem & 0xffff) < 0x400)
 333                         psxHu16ref(mem) = SWAPu16(value);
 334                 else
 335                         psxHwWrite16(mem, value);
 336         } else {
 337                 p = (char *)(psxMemWLUT[t]);
 338                 if (p != NULL) {
 339                         if (Config.Debug)
 340                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 341                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 342 #ifdef PSXREC
 343                         psxCpu->Clear((mem & (~3)), 1);
 344 #endif
 345                 } else {
 346 #ifdef PSXMEM_LOG
 347                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 348 #endif
 349                 }
 350         }
 351 }
 352
 353 void psxMemWrite32(u32 mem, u32 value) {
 354         char *p;
 355         u32 t;
 356
 357 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 358         t = mem >> 16;
 359         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 360                 if ((mem & 0xffff) < 0x400)
 361                         psxHu32ref(mem) = SWAPu32(value);
 362                 else
 363                         psxHwWrite32(mem, value);
 364         } else {
 365                 p = (char *)(psxMemWLUT[t]);
 366                 if (p != NULL) {
 367                         if (Config.Debug)
 368                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 369                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 370 #ifdef PSXREC
 371                         psxCpu->Clear(mem, 1);
 372 #endif
 373                 } else {
 374                         if (mem != 0xfffe0130) {
 375 #ifdef PSXREC
 376                                 if (!writeok)
 377                                         psxCpu->Clear(mem, 1);
 378 #endif
 379
 380 #ifdef PSXMEM_LOG
 381                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 382 #endif
 383                         } else {
 384                                 int i;
 385
 386                                 switch (value) {
 387                                         case 0x800: case 0x804:
 388                                                 if (writeok == 0) break;
 389                                                 writeok = 0;
 390                                                 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
 391                                                 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
 392                                                 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
 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                                                 break;
 401                                         default:
 402 #ifdef PSXMEM_LOG
 403                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 404 #endif
 405                                                 break;
 406                                 }
 407                         }
 408                 }
 409         }
 410 }
 411
 412 void *psxMemPointer(u32 mem) {
 413         char *p;
 414         u32 t;
 415
 416         t = mem >> 16;
 417         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 418                 if ((mem & 0xffff) < 0x400)
 419                         return (void *)&psxH[mem];
 420                 else
 421                         return NULL;
 422         } else {
 423                 p = (char *)(psxMemWLUT[t]);
 424                 if (p != NULL) {
 425                         return (void *)(p + (mem & 0xffff));
 426                 }
 427                 return NULL;
 428         }
 429 }