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)
47 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
49 return mmap((void *)(uintptr_t)addr, size,
50 PROT_READ | PROT_WRITE, flags, -1, 0);
53 static void psxUnmapDefault(void *ptr, size_t size, enum psxMapTag tag)
58 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
59 enum psxMapTag tag) = psxMapDefault;
60 void (*psxUnmapHook)(void *ptr, size_t size,
61 enum psxMapTag tag) = psxUnmapDefault;
63 void *psxMap(unsigned long addr, size_t size, int is_fixed,
71 ret = psxMapHook(addr, size, 0, tag);
75 if (addr != 0 && ret != (void *)(uintptr_t)addr) {
76 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
80 psxUnmap(ret, size, tag);
84 if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2)
86 psxUnmap(ret, size, tag);
88 // try to use similarly aligned memory instead
89 // (recompiler needs this)
90 mask = try_ ? 0xffff : 0xffffff;
91 addr = ((uintptr_t)ret + mask) & ~mask;
100 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
102 psxUnmapHook(ptr, size, tag);
105 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
106 s8 *psxP = NULL; // Parallel Port (64K)
107 s8 *psxR = NULL; // BIOS ROM (512K)
108 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
110 u8 **psxMemWLUT = NULL;
111 u8 **psxMemRLUT = NULL;
113 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
114 0x0000_0000-0x0000_ffff Kernel (64K)
115 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
117 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
119 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
121 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
123 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
125 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
126 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
128 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
129 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
132 static int psxMemInitMap(void)
134 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
135 if (psxM == MAP_FAILED)
136 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
137 if (psxM == MAP_FAILED) {
138 SysMessage(_("mapping main RAM failed"));
142 psxP = &psxM[0x200000];
144 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
145 if (psxH == MAP_FAILED) {
146 SysMessage(_("Error allocating memory!"));
151 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
152 if (psxR == MAP_FAILED) {
153 SysMessage(_("Error allocating memory!"));
161 static void psxMemFreeMap(void)
163 if (psxM) psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
164 if (psxH) psxUnmap(psxH, 0x10000, MAP_TAG_OTHER);
165 if (psxR) psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
166 psxM = psxH = psxR = NULL;
175 if (LIGHTREC_CUSTOM_MAP)
176 ret = lightrec_init_mmap();
178 ret = psxMemInitMap();
180 SysMessage(_("Error allocating memory!"));
185 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
186 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
188 if (psxMemRLUT == NULL || psxMemWLUT == NULL) {
189 SysMessage(_("Error allocating memory!"));
194 memset(psxMemRLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
195 memset(psxMemWLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
198 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
200 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
201 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
203 psxMemRLUT[0x1f00] = (u8 *)psxP;
204 psxMemRLUT[0x1f80] = (u8 *)psxH;
206 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
208 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
209 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
212 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
214 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
215 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
217 // Don't allow writes to PIO Expansion region (psxP) to take effect.
218 // NOTE: Not sure if this is needed to fix any games but seems wise,
219 // seeing as some games do read from PIO as part of copy-protection
220 // check. (See fix in psxMemReset() regarding psxP region reads).
221 psxMemWLUT[0x1f00] = INVALID_PTR;
222 psxMemWLUT[0x1f80] = (u8 *)psxH;
231 memset(psxM, 0, 0x00200000);
232 memset(psxP, 0xff, 0x00010000);
236 if (strcmp(Config.Bios, "HLE") != 0) {
237 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
238 f = fopen(bios, "rb");
241 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
242 memset(psxR, 0, 0x80000);
244 if (fread(psxR, 1, 0x80000, f) == 0x80000) {
247 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
254 void psxMemShutdown() {
255 if (LIGHTREC_CUSTOM_MAP)
256 lightrec_free_mmap();
260 free(psxMemRLUT); psxMemRLUT = NULL;
261 free(psxMemWLUT); psxMemWLUT = NULL;
264 void psxMemOnIsolate(int enable)
267 memset(psxMemWLUT + 0x0000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
268 memset(psxMemWLUT + 0x8000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
269 //memset(psxMemWLUT + 0xa000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
272 for (i = 0; i < 0x80; i++)
273 psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
274 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
275 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
277 psxCpu->Notify(enable ? R3000ACPU_NOTIFY_CACHE_ISOLATED
278 : R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
281 u8 psxMemRead8(u32 mem) {
286 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
287 if ((mem & 0xffff) < 0x400)
290 return psxHwRead8(mem);
292 p = (char *)(psxMemRLUT[t]);
293 if (p != INVALID_PTR) {
295 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
296 return *(u8 *)(p + (mem & 0xffff));
299 PSXMEM_LOG("err lb %8.8lx\n", mem);
306 u16 psxMemRead16(u32 mem) {
311 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
312 if ((mem & 0xffff) < 0x400)
315 return psxHwRead16(mem);
317 p = (char *)(psxMemRLUT[t]);
318 if (p != INVALID_PTR) {
320 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
321 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
324 PSXMEM_LOG("err lh %8.8lx\n", mem);
331 u32 psxMemRead32(u32 mem) {
336 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
337 if ((mem & 0xffff) < 0x400)
340 return psxHwRead32(mem);
342 p = (char *)(psxMemRLUT[t]);
343 if (p != INVALID_PTR) {
345 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
346 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
348 if (mem == 0xfffe0130)
349 return psxRegs.biuReg;
351 PSXMEM_LOG("err lw %8.8lx\n", mem);
358 void psxMemWrite8(u32 mem, u8 value) {
363 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
364 if ((mem & 0xffff) < 0x400)
367 psxHwWrite8(mem, value);
369 p = (char *)(psxMemWLUT[t]);
370 if (p != INVALID_PTR) {
372 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
373 *(u8 *)(p + (mem & 0xffff)) = value;
375 psxCpu->Clear((mem & (~3)), 1);
379 PSXMEM_LOG("err sb %8.8lx\n", mem);
385 void psxMemWrite16(u32 mem, u16 value) {
390 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
391 if ((mem & 0xffff) < 0x400)
392 psxHu16ref(mem) = SWAPu16(value);
394 psxHwWrite16(mem, value);
396 p = (char *)(psxMemWLUT[t]);
397 if (p != INVALID_PTR) {
399 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
400 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
402 psxCpu->Clear((mem & (~3)), 1);
406 PSXMEM_LOG("err sh %8.8lx\n", mem);
412 void psxMemWrite32(u32 mem, u32 value) {
416 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
418 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
419 if ((mem & 0xffff) < 0x400)
420 psxHu32ref(mem) = SWAPu32(value);
422 psxHwWrite32(mem, value);
424 p = (char *)(psxMemWLUT[t]);
425 if (p != INVALID_PTR) {
427 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
428 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
430 psxCpu->Clear(mem, 1);
433 if (mem == 0xfffe0130) {
434 psxRegs.biuReg = value;
438 PSXMEM_LOG("err sw %8.8lx\n", mem);
444 void *psxMemPointer(u32 mem) {
449 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
450 if ((mem & 0xffff) < 0x400)
451 return (void *)&psxH[mem];
455 p = (char *)(psxMemWLUT[t]);
456 if (p != INVALID_PTR) {
457 return (void *)(p + (mem & 0xffff));