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 #include <sys/mman.h>
  32
  33 #ifndef MAP_ANONYMOUS
  34 #define MAP_ANONYMOUS MAP_ANON
  35 #endif
  36
  37 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
  38                 enum psxMapTag tag);
  39 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
  40
  41 void *psxMap(unsigned long addr, size_t size, int is_fixed,
  42                 enum psxMapTag tag)
  43 {
  44         int flags = MAP_PRIVATE | MAP_ANONYMOUS;
  45         int tried_to_align = 0;
  46         unsigned long mask;
  47         void *req, *ret;
  48
  49 retry:
  50         if (psxMapHook != NULL) {
  51                 ret = psxMapHook(addr, size, is_fixed, tag);
  52                 goto out;
  53         }
  54
  55         if (is_fixed)
  56                 flags |= MAP_FIXED;
  57
  58         req = (void *)addr;
  59         ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
  60         if (ret == MAP_FAILED)
  61                 return NULL;
  62
  63 out:
  64         if (addr != 0 && ret != (void *)addr) {
  65                 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
  66                         addr, ret);
  67
  68                 if (ret != NULL && ((addr ^ (long)ret) & 0x00ffffff)
  69                     && !tried_to_align)
  70                 {
  71                         psxUnmap(ret, size, tag);
  72
  73                         // try to use similarly aligned memory instead
  74                         // (recompiler needs this)
  75                         mask = (addr - 1) & ~addr & 0x07ffffff;
  76                         addr = (unsigned long)(ret + mask) & ~mask;
  77                         tried_to_align = 1;
  78                         goto retry;
  79                 }
  80         }
  81
  82         return ret;
  83 }
  84
  85 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
  86 {
  87         if (psxUnmapHook != NULL) {
  88                 psxUnmapHook(ptr, size, tag);
  89                 return;
  90         }
  91
  92         munmap(ptr, size);
  93 }
  94
  95 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
  96 s8 *psxP = NULL; // Parallel Port (64K)
  97 s8 *psxR = NULL; // BIOS ROM (512K)
  98 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
  99
 100 u8 **psxMemWLUT = NULL;
 101 u8 **psxMemRLUT = NULL;
 102
 103 /*  Playstation Memory Map (from Playstation doc by Joshua Walker)
 104 0x0000_0000-0x0000_ffff         Kernel (64K)
 105 0x0001_0000-0x001f_ffff         User Memory (1.9 Meg)
 106
 107 0x1f00_0000-0x1f00_ffff         Parallel Port (64K)
 108
 109 0x1f80_0000-0x1f80_03ff         Scratch Pad (1024 bytes)
 110
 111 0x1f80_1000-0x1f80_2fff         Hardware Registers (8K)
 112
 113 0x1fc0_0000-0x1fc7_ffff         BIOS (512K)
 114
 115 0x8000_0000-0x801f_ffff         Kernel and User Memory Mirror (2 Meg) Cached
 116 0x9fc0_0000-0x9fc7_ffff         BIOS Mirror (512K) Cached
 117
 118 0xa000_0000-0xa01f_ffff         Kernel and User Memory Mirror (2 Meg) Uncached
 119 0xbfc0_0000-0xbfc7_ffff         BIOS Mirror (512K) Uncached
 120 */
 121
 122 int psxMemInit() {
 123         int i;
 124
 125         psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 126         psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
 127         memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
 128         memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
 129
 130         psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
 131 #ifndef RAM_FIXED
 132 #ifdef __BLACKBERRY_QNX__
 133         if (psxM == NULL)
 134                 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
 135 #else
 136         if (psxM == NULL)
 137                 psxM = psxMap(0x78000000, 0x00210000, 0, MAP_TAG_RAM);
 138 #endif
 139 #endif
 140         if (psxM == NULL) {
 141                 SysMessage(_("mapping main RAM failed"));
 142                 return -1;
 143         }
 144
 145         psxP = &psxM[0x200000];
 146         psxH = psxMap(0x1f800000, 0x10000, 1, MAP_TAG_OTHER);
 147         psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
 148
 149         if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
 150                 psxR == NULL || psxP == NULL || psxH != (void *)0x1f800000) {
 151                 SysMessage(_("Error allocating memory!"));
 152                 return -1;
 153         }
 154
 155 // MemR
 156         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 157
 158         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
 159         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
 160
 161         psxMemRLUT[0x1f00] = (u8 *)psxP;
 162         psxMemRLUT[0x1f80] = (u8 *)psxH;
 163
 164         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
 165
 166         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 167         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 168
 169 // MemW
 170         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 171
 172         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 173         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 174
 175         psxMemWLUT[0x1f00] = (u8 *)psxP;
 176         psxMemWLUT[0x1f80] = (u8 *)psxH;
 177
 178         return 0;
 179 }
 180
 181 void psxMemReset() {
 182         FILE *f = NULL;
 183         char bios[1024];
 184
 185         memset(psxM, 0, 0x00200000);
 186         memset(psxP, 0, 0x00010000);
 187
 188         if (strcmp(Config.Bios, "HLE") != 0) {
 189                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 190                 f = fopen(bios, "rb");
 191
 192                 if (f == NULL) {
 193                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 194                         memset(psxR, 0, 0x80000);
 195                         Config.HLE = TRUE;
 196                 } else {
 197                         fread(psxR, 1, 0x80000, f);
 198                         fclose(f);
 199                         Config.HLE = FALSE;
 200                 }
 201         } else Config.HLE = TRUE;
 202 }
 203
 204 void psxMemShutdown() {
 205         psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
 206         psxUnmap(psxH, 0x10000, MAP_TAG_OTHER);
 207         psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
 208
 209         free(psxMemRLUT);
 210         free(psxMemWLUT);
 211 }
 212
 213 static int writeok = 1;
 214
 215 u8 psxMemRead8(u32 mem) {
 216         char *p;
 217         u32 t;
 218
 219         t = mem >> 16;
 220         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 221                 if ((mem & 0xffff) < 0x400)
 222                         return psxHu8(mem);
 223                 else
 224                         return psxHwRead8(mem);
 225         } else {
 226                 p = (char *)(psxMemRLUT[t]);
 227                 if (p != NULL) {
 228                         if (Config.Debug)
 229                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 230                         return *(u8 *)(p + (mem & 0xffff));
 231                 } else {
 232 #ifdef PSXMEM_LOG
 233                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 234 #endif
 235                         return 0;
 236                 }
 237         }
 238 }
 239
 240 u16 psxMemRead16(u32 mem) {
 241         char *p;
 242         u32 t;
 243
 244         t = mem >> 16;
 245         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 246                 if ((mem & 0xffff) < 0x400)
 247                         return psxHu16(mem);
 248                 else
 249                         return psxHwRead16(mem);
 250         } else {
 251                 p = (char *)(psxMemRLUT[t]);
 252                 if (p != NULL) {
 253                         if (Config.Debug)
 254                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 255                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 256                 } else {
 257 #ifdef PSXMEM_LOG
 258                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 259 #endif
 260                         return 0;
 261                 }
 262         }
 263 }
 264
 265 u32 psxMemRead32(u32 mem) {
 266         char *p;
 267         u32 t;
 268
 269         t = mem >> 16;
 270         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 271                 if ((mem & 0xffff) < 0x400)
 272                         return psxHu32(mem);
 273                 else
 274                         return psxHwRead32(mem);
 275         } else {
 276                 p = (char *)(psxMemRLUT[t]);
 277                 if (p != NULL) {
 278                         if (Config.Debug)
 279                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 280                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 281                 } else {
 282 #ifdef PSXMEM_LOG
 283                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 284 #endif
 285                         return 0;
 286                 }
 287         }
 288 }
 289
 290 void psxMemWrite8(u32 mem, u8 value) {
 291         char *p;
 292         u32 t;
 293
 294         t = mem >> 16;
 295         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 296                 if ((mem & 0xffff) < 0x400)
 297                         psxHu8(mem) = value;
 298                 else
 299                         psxHwWrite8(mem, value);
 300         } else {
 301                 p = (char *)(psxMemWLUT[t]);
 302                 if (p != NULL) {
 303                         if (Config.Debug)
 304                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 305                         *(u8 *)(p + (mem & 0xffff)) = value;
 306 #ifdef PSXREC
 307                         psxCpu->Clear((mem & (~3)), 1);
 308 #endif
 309                 } else {
 310 #ifdef PSXMEM_LOG
 311                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 312 #endif
 313                 }
 314         }
 315 }
 316
 317 void psxMemWrite16(u32 mem, u16 value) {
 318         char *p;
 319         u32 t;
 320
 321         t = mem >> 16;
 322         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 323                 if ((mem & 0xffff) < 0x400)
 324                         psxHu16ref(mem) = SWAPu16(value);
 325                 else
 326                         psxHwWrite16(mem, value);
 327         } else {
 328                 p = (char *)(psxMemWLUT[t]);
 329                 if (p != NULL) {
 330                         if (Config.Debug)
 331                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 332                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 333 #ifdef PSXREC
 334                         psxCpu->Clear((mem & (~3)), 1);
 335 #endif
 336                 } else {
 337 #ifdef PSXMEM_LOG
 338                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 339 #endif
 340                 }
 341         }
 342 }
 343
 344 void psxMemWrite32(u32 mem, u32 value) {
 345         char *p;
 346         u32 t;
 347
 348 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 349         t = mem >> 16;
 350         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 351                 if ((mem & 0xffff) < 0x400)
 352                         psxHu32ref(mem) = SWAPu32(value);
 353                 else
 354                         psxHwWrite32(mem, value);
 355         } else {
 356                 p = (char *)(psxMemWLUT[t]);
 357                 if (p != NULL) {
 358                         if (Config.Debug)
 359                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 360                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 361 #ifdef PSXREC
 362                         psxCpu->Clear(mem, 1);
 363 #endif
 364                 } else {
 365                         if (mem != 0xfffe0130) {
 366 #ifdef PSXREC
 367                                 if (!writeok)
 368                                         psxCpu->Clear(mem, 1);
 369 #endif
 370
 371 #ifdef PSXMEM_LOG
 372                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 373 #endif
 374                         } else {
 375                                 int i;
 376
 377                                 switch (value) {
 378                                         case 0x800: case 0x804:
 379                                                 if (writeok == 0) break;
 380                                                 writeok = 0;
 381                                                 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
 382                                                 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
 383                                                 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
 384                                                 break;
 385                                         case 0x00: case 0x1e988:
 386                                                 if (writeok == 1) break;
 387                                                 writeok = 1;
 388                                                 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 389                                                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 390                                                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 391                                                 break;
 392                                         default:
 393 #ifdef PSXMEM_LOG
 394                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 395 #endif
 396                                                 break;
 397                                 }
 398                         }
 399                 }
 400         }
 401 }
 402
 403 void *psxMemPointer(u32 mem) {
 404         char *p;
 405         u32 t;
 406
 407         t = mem >> 16;
 408         if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
 409                 if ((mem & 0xffff) < 0x400)
 410                         return (void *)&psxH[mem];
 411                 else
 412                         return NULL;
 413         } else {
 414                 p = (char *)(psxMemWLUT[t]);
 415                 if (p != NULL) {
 416                         return (void *)(p + (mem & 0xffff));
 417                 }
 418                 return NULL;
 419         }
 420 }