1 /***************************************************************************
2 * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
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. *
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. *
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 ***************************************************************************/
21 * PSX memory functions.
24 // TODO: Implement caches & cycle penalty.
27 #include "psxmem_map.h"
31 #define DebugCheckBP(...)
33 #include "lightrec/mem.h"
36 #ifdef USE_LIBRETRO_VFS
37 #include <streams/file_stream_transforms.h>
41 #define MAP_ANONYMOUS MAP_ANON
44 static void * psxMapDefault(unsigned long addr, size_t size,
45 int is_fixed, enum psxMapTag tag)
51 return ptr ? ptr : MAP_FAILED;
53 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
55 return mmap((void *)(uintptr_t)addr, size,
56 PROT_READ | PROT_WRITE, flags, -1, 0);
60 static void psxUnmapDefault(void *ptr, size_t size, enum psxMapTag tag)
69 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
70 enum psxMapTag tag) = psxMapDefault;
71 void (*psxUnmapHook)(void *ptr, size_t size,
72 enum psxMapTag tag) = psxUnmapDefault;
74 void *psxMap(unsigned long addr, size_t size, int is_fixed,
82 ret = psxMapHook(addr, size, 0, tag);
86 if (addr != 0 && ret != (void *)(uintptr_t)addr) {
87 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
91 psxUnmap(ret, size, tag);
95 if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2)
97 psxUnmap(ret, size, tag);
99 // try to use similarly aligned memory instead
100 // (recompiler needs this)
101 mask = try_ ? 0xffff : 0xffffff;
102 addr = ((uintptr_t)ret + mask) & ~mask;
111 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
113 psxUnmapHook(ptr, size, tag);
116 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
117 s8 *psxP = NULL; // Parallel Port (64K)
118 s8 *psxR = NULL; // BIOS ROM (512K)
119 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
121 u8 **psxMemWLUT = NULL;
122 u8 **psxMemRLUT = NULL;
124 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
125 0x0000_0000-0x0000_ffff Kernel (64K)
126 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
128 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
130 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
132 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
134 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
136 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
137 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
139 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
140 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
143 static int psxMemInitMap(void)
145 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
146 if (psxM == MAP_FAILED)
147 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
148 if (psxM == MAP_FAILED) {
149 SysMessage(_("mapping main RAM failed"));
153 psxP = &psxM[0x200000];
155 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
156 if (psxH == MAP_FAILED) {
157 SysMessage(_("Error allocating memory!"));
162 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
163 if (psxR == MAP_FAILED) {
164 SysMessage(_("Error allocating memory!"));
172 static void psxMemFreeMap(void)
174 if (psxM) psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
175 if (psxH) psxUnmap(psxH, 0x10000, MAP_TAG_OTHER);
176 if (psxR) psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
177 psxM = psxH = psxR = NULL;
186 if (LIGHTREC_CUSTOM_MAP)
187 ret = lightrec_init_mmap();
189 ret = psxMemInitMap();
191 SysMessage(_("Error allocating memory!"));
196 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
197 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
199 if (psxMemRLUT == NULL || psxMemWLUT == NULL) {
200 SysMessage(_("Error allocating memory!"));
205 memset(psxMemRLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
206 memset(psxMemWLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
209 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
211 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
212 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
214 psxMemRLUT[0x1f00] = (u8 *)psxP;
215 psxMemRLUT[0x1f80] = (u8 *)psxH;
217 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
219 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
220 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
223 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
225 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
226 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
228 // Don't allow writes to PIO Expansion region (psxP) to take effect.
229 // NOTE: Not sure if this is needed to fix any games but seems wise,
230 // seeing as some games do read from PIO as part of copy-protection
231 // check. (See fix in psxMemReset() regarding psxP region reads).
232 psxMemWLUT[0x1f00] = INVALID_PTR;
233 psxMemWLUT[0x1f80] = (u8 *)psxH;
242 memset(psxM, 0, 0x00200000);
243 memset(psxP, 0xff, 0x00010000);
247 if (strcmp(Config.Bios, "HLE") != 0) {
248 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
249 f = fopen(bios, "rb");
252 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
253 memset(psxR, 0, 0x80000);
255 if (fread(psxR, 1, 0x80000, f) == 0x80000) {
258 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
265 void psxMemShutdown() {
266 if (LIGHTREC_CUSTOM_MAP)
267 lightrec_free_mmap();
271 free(psxMemRLUT); psxMemRLUT = NULL;
272 free(psxMemWLUT); psxMemWLUT = NULL;
275 void psxMemOnIsolate(int enable)
278 memset(psxMemWLUT + 0x0000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
279 memset(psxMemWLUT + 0x8000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
280 //memset(psxMemWLUT + 0xa000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
283 for (i = 0; i < 0x80; i++)
284 psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
285 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
286 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
288 psxCpu->Notify(enable ? R3000ACPU_NOTIFY_CACHE_ISOLATED
289 : R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
292 u8 psxMemRead8(u32 mem) {
297 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
298 if ((mem & 0xffff) < 0x400)
301 return psxHwRead8(mem);
303 p = (char *)(psxMemRLUT[t]);
304 if (p != INVALID_PTR) {
306 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
307 return *(u8 *)(p + (mem & 0xffff));
310 PSXMEM_LOG("err lb %8.8lx\n", mem);
317 u16 psxMemRead16(u32 mem) {
322 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
323 if ((mem & 0xffff) < 0x400)
326 return psxHwRead16(mem);
328 p = (char *)(psxMemRLUT[t]);
329 if (p != INVALID_PTR) {
331 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
332 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
335 PSXMEM_LOG("err lh %8.8lx\n", mem);
342 u32 psxMemRead32(u32 mem) {
347 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
348 if ((mem & 0xffff) < 0x400)
351 return psxHwRead32(mem);
353 p = (char *)(psxMemRLUT[t]);
354 if (p != INVALID_PTR) {
356 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
357 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
359 if (mem == 0xfffe0130)
360 return psxRegs.biuReg;
362 PSXMEM_LOG("err lw %8.8lx\n", mem);
369 void psxMemWrite8(u32 mem, u8 value) {
374 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
375 if ((mem & 0xffff) < 0x400)
378 psxHwWrite8(mem, value);
380 p = (char *)(psxMemWLUT[t]);
381 if (p != INVALID_PTR) {
383 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
384 *(u8 *)(p + (mem & 0xffff)) = value;
386 psxCpu->Clear((mem & (~3)), 1);
390 PSXMEM_LOG("err sb %8.8lx\n", mem);
396 void psxMemWrite16(u32 mem, u16 value) {
401 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
402 if ((mem & 0xffff) < 0x400)
403 psxHu16ref(mem) = SWAPu16(value);
405 psxHwWrite16(mem, value);
407 p = (char *)(psxMemWLUT[t]);
408 if (p != INVALID_PTR) {
410 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
411 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
413 psxCpu->Clear((mem & (~3)), 1);
417 PSXMEM_LOG("err sh %8.8lx\n", mem);
423 void psxMemWrite32(u32 mem, u32 value) {
427 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
429 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
430 if ((mem & 0xffff) < 0x400)
431 psxHu32ref(mem) = SWAPu32(value);
433 psxHwWrite32(mem, value);
435 p = (char *)(psxMemWLUT[t]);
436 if (p != INVALID_PTR) {
438 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
439 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
441 psxCpu->Clear(mem, 1);
444 if (mem == 0xfffe0130) {
445 psxRegs.biuReg = value;
449 PSXMEM_LOG("err sw %8.8lx\n", mem);
455 void *psxMemPointer(u32 mem) {
460 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
461 if ((mem & 0xffff) < 0x400)
462 return (void *)&psxH[mem];
466 p = (char *)(psxMemWLUT[t]);
467 if (p != INVALID_PTR) {
468 return (void *)(p + (mem & 0xffff));