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 "r3000a.h"
  28 #include "psxhw.h"
  29 #include "debug.h"
  30 #include <sys/mman.h>
  31
  32 #ifndef MAP_ANONYMOUS
  33 #define MAP_ANONYMOUS MAP_ANON
  34 #endif
  35
  36 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
  37 s8 *psxP = NULL; // Parallel Port (64K)
  38 s8 *psxR = NULL; // BIOS ROM (512K)
  39 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
  40
  41 u8 **psxMemWLUT = NULL;
  42 u8 **psxMemRLUT = NULL;
  43
  44 /*  Playstation Memory Map (from Playstation doc by Joshua Walker)
  45 0x0000_0000-0x0000_ffff         Kernel (64K)
  46 0x0001_0000-0x001f_ffff         User Memory (1.9 Meg)
  47
  48 0x1f00_0000-0x1f00_ffff         Parallel Port (64K)
  49
  50 0x1f80_0000-0x1f80_03ff         Scratch Pad (1024 bytes)
  51
  52 0x1f80_1000-0x1f80_2fff         Hardware Registers (8K)
  53
  54 0x1fc0_0000-0x1fc7_ffff         BIOS (512K)
  55
  56 0x8000_0000-0x801f_ffff         Kernel and User Memory Mirror (2 Meg) Cached
  57 0x9fc0_0000-0x9fc7_ffff         BIOS Mirror (512K) Cached
  58
  59 0xa000_0000-0xa01f_ffff         Kernel and User Memory Mirror (2 Meg) Uncached
  60 0xbfc0_0000-0xbfc7_ffff         BIOS Mirror (512K) Uncached
  61 */
  62
  63 #if 1
  64 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed);
  65 void  plat_munmap(void *ptr, size_t size);
  66 #else
  67 #define plat_mmap(addr, size, need_exec, is_fixed) \
  68         mmap((void *)addr, size, PROT_WRITE | PROT_READ, \
  69         MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0)
  70 #define plat_munmap munmap
  71 #endif
  72
  73 int psxMemInit() {
  74         int i;
  75
  76         psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
  77         psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
  78         memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
  79         memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
  80
  81         psxM = plat_mmap(0x80000000, 0x00210000, 0, 1);
  82 #ifndef RAM_FIXED
  83         if (psxM == MAP_FAILED)
  84                 psxM = mmap((void *)0x70000000, 0x00210000,
  85                         PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
  86 #endif
  87         if (psxM == MAP_FAILED) {
  88                 SysMessage(_("mapping main RAM failed"));
  89                 return -1;
  90         }
  91
  92         psxP = &psxM[0x200000];
  93         psxH = mmap((void *)0x1f800000, 0x00010000,
  94                 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
  95
  96         psxR = mmap((void *)0x1fc00000, 0x80000,
  97                 PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
  98
  99         if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
 100                 psxR == MAP_FAILED ||
 101                 psxP == NULL || psxH != (void *)0x1f800000) {
 102                 SysMessage(_("Error allocating memory!"));
 103                 return -1;
 104         }
 105
 106 // MemR
 107         for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 108
 109         memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
 110         memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
 111
 112         psxMemRLUT[0x1f00] = (u8 *)psxP;
 113         psxMemRLUT[0x1f80] = (u8 *)psxH;
 114
 115         for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
 116
 117         memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 118         memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
 119
 120 // MemW
 121         for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
 122
 123         memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 124         memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 125
 126         psxMemWLUT[0x1f00] = (u8 *)psxP;
 127         psxMemWLUT[0x1f80] = (u8 *)psxH;
 128
 129         return 0;
 130 }
 131
 132 void psxMemReset() {
 133         FILE *f = NULL;
 134         char bios[1024];
 135
 136         memset(psxM, 0, 0x00200000);
 137         memset(psxP, 0, 0x00010000);
 138
 139         if (strcmp(Config.Bios, "HLE") != 0) {
 140                 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
 141                 f = fopen(bios, "rb");
 142
 143                 if (f == NULL) {
 144                         SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
 145                         memset(psxR, 0, 0x80000);
 146                         Config.HLE = TRUE;
 147                 } else {
 148                         fread(psxR, 1, 0x80000, f);
 149                         fclose(f);
 150                         Config.HLE = FALSE;
 151                 }
 152         } else Config.HLE = TRUE;
 153 }
 154
 155 void psxMemShutdown() {
 156         plat_munmap(psxM, 0x00210000);
 157         munmap(psxH, 0x1f800000);
 158         munmap(psxR, 0x80000);
 159
 160         free(psxMemRLUT);
 161         free(psxMemWLUT);
 162 }
 163
 164 static int writeok = 1;
 165
 166 u8 psxMemRead8(u32 mem) {
 167         char *p;
 168         u32 t;
 169
 170         t = mem >> 16;
 171         if (t == 0x1f80) {
 172                 if (mem < 0x1f801000)
 173                         return psxHu8(mem);
 174                 else
 175                         return psxHwRead8(mem);
 176         } else {
 177                 p = (char *)(psxMemRLUT[t]);
 178                 if (p != NULL) {
 179                         if (Config.Debug)
 180                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
 181                         return *(u8 *)(p + (mem & 0xffff));
 182                 } else {
 183 #ifdef PSXMEM_LOG
 184                         PSXMEM_LOG("err lb %8.8lx\n", mem);
 185 #endif
 186                         return 0;
 187                 }
 188         }
 189 }
 190
 191 u16 psxMemRead16(u32 mem) {
 192         char *p;
 193         u32 t;
 194
 195         t = mem >> 16;
 196         if (t == 0x1f80) {
 197                 if (mem < 0x1f801000)
 198                         return psxHu16(mem);
 199                 else
 200                         return psxHwRead16(mem);
 201         } else {
 202                 p = (char *)(psxMemRLUT[t]);
 203                 if (p != NULL) {
 204                         if (Config.Debug)
 205                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
 206                         return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
 207                 } else {
 208 #ifdef PSXMEM_LOG
 209                         PSXMEM_LOG("err lh %8.8lx\n", mem);
 210 #endif
 211                         return 0;
 212                 }
 213         }
 214 }
 215
 216 u32 psxMemRead32(u32 mem) {
 217         char *p;
 218         u32 t;
 219
 220         t = mem >> 16;
 221         if (t == 0x1f80) {
 222                 if (mem < 0x1f801000)
 223                         return psxHu32(mem);
 224                 else
 225                         return psxHwRead32(mem);
 226         } else {
 227                 p = (char *)(psxMemRLUT[t]);
 228                 if (p != NULL) {
 229                         if (Config.Debug)
 230                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
 231                         return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
 232                 } else {
 233 #ifdef PSXMEM_LOG
 234                         if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
 235 #endif
 236                         return 0;
 237                 }
 238         }
 239 }
 240
 241 void psxMemWrite8(u32 mem, u8 value) {
 242         char *p;
 243         u32 t;
 244
 245         t = mem >> 16;
 246         if (t == 0x1f80) {
 247                 if (mem < 0x1f801000)
 248                         psxHu8(mem) = value;
 249                 else
 250                         psxHwWrite8(mem, value);
 251         } else {
 252                 p = (char *)(psxMemWLUT[t]);
 253                 if (p != NULL) {
 254                         if (Config.Debug)
 255                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
 256                         *(u8 *)(p + (mem & 0xffff)) = value;
 257 #ifdef PSXREC
 258                         psxCpu->Clear((mem & (~3)), 1);
 259 #endif
 260                 } else {
 261 #ifdef PSXMEM_LOG
 262                         PSXMEM_LOG("err sb %8.8lx\n", mem);
 263 #endif
 264                 }
 265         }
 266 }
 267
 268 void psxMemWrite16(u32 mem, u16 value) {
 269         char *p;
 270         u32 t;
 271
 272         t = mem >> 16;
 273         if (t == 0x1f80) {
 274                 if (mem < 0x1f801000)
 275                         psxHu16ref(mem) = SWAPu16(value);
 276                 else
 277                         psxHwWrite16(mem, value);
 278         } else {
 279                 p = (char *)(psxMemWLUT[t]);
 280                 if (p != NULL) {
 281                         if (Config.Debug)
 282                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
 283                         *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
 284 #ifdef PSXREC
 285                         psxCpu->Clear((mem & (~3)), 1);
 286 #endif
 287                 } else {
 288 #ifdef PSXMEM_LOG
 289                         PSXMEM_LOG("err sh %8.8lx\n", mem);
 290 #endif
 291                 }
 292         }
 293 }
 294
 295 void psxMemWrite32(u32 mem, u32 value) {
 296         char *p;
 297         u32 t;
 298
 299 //      if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
 300         t = mem >> 16;
 301         if (t == 0x1f80) {
 302                 if (mem < 0x1f801000)
 303                         psxHu32ref(mem) = SWAPu32(value);
 304                 else
 305                         psxHwWrite32(mem, value);
 306         } else {
 307                 p = (char *)(psxMemWLUT[t]);
 308                 if (p != NULL) {
 309                         if (Config.Debug)
 310                                 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
 311                         *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
 312 #ifdef PSXREC
 313                         psxCpu->Clear(mem, 1);
 314 #endif
 315                 } else {
 316                         if (mem != 0xfffe0130) {
 317 #ifdef PSXREC
 318                                 if (!writeok)
 319                                         psxCpu->Clear(mem, 1);
 320 #endif
 321
 322 #ifdef PSXMEM_LOG
 323                                 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
 324 #endif
 325                         } else {
 326                                 int i;
 327
 328                                 switch (value) {
 329                                         case 0x800: case 0x804:
 330                                                 if (writeok == 0) break;
 331                                                 writeok = 0;
 332                                                 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
 333                                                 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
 334                                                 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
 335                                                 break;
 336                                         case 0x00: case 0x1e988:
 337                                                 if (writeok == 1) break;
 338                                                 writeok = 1;
 339                                                 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
 340                                                 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
 341                                                 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
 342                                                 break;
 343                                         default:
 344 #ifdef PSXMEM_LOG
 345                                                 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
 346 #endif
 347                                                 break;
 348                                 }
 349                         }
 350                 }
 351         }
 352 }
 353
 354 void *psxMemPointer(u32 mem) {
 355         char *p;
 356         u32 t;
 357
 358         t = mem >> 16;
 359         if (t == 0x1f80) {
 360                 if (mem < 0x1f801000)
 361                         return (void *)&psxH[mem];
 362                 else
 363                         return NULL;
 364         } else {
 365                 p = (char *)(psxMemWLUT[t]);
 366                 if (p != NULL) {
 367                         return (void *)(p + (mem & 0xffff));
 368                 }
 369                 return NULL;
 370         }
 371 }