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"
34 #ifdef USE_LIBRETRO_VFS
35 #include <streams/file_stream_transforms.h>
39 #define MAP_ANONYMOUS MAP_ANON
42 boolean writeok = TRUE;
47 void DebugCheckBP(u32 address, enum breakpoint_types type) {}
50 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
52 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
54 void *psxMap(unsigned long addr, size_t size, int is_fixed,
57 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
63 if (psxMapHook != NULL) {
64 ret = psxMapHook(addr, size, 0, tag);
69 /* avoid MAP_FIXED, it overrides existing mappings.. */
71 flags |= MAP_FIXED; */
74 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
75 if (ret == MAP_FAILED)
79 if (addr != 0 && ret != (void *)addr) {
80 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
84 psxUnmap(ret, size, tag);
88 if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2)
90 psxUnmap(ret, size, tag);
92 // try to use similarly aligned memory instead
93 // (recompiler needs this)
94 mask = try_ ? 0xffff : 0xffffff;
95 addr = ((unsigned long)ret + mask) & ~mask;
104 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
106 if (psxUnmapHook != NULL) {
107 psxUnmapHook(ptr, size, tag);
115 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
116 s8 *psxP = NULL; // Parallel Port (64K)
117 s8 *psxR = NULL; // BIOS ROM (512K)
118 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
120 u8 **psxMemWLUT = NULL;
121 u8 **psxMemRLUT = NULL;
123 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
124 0x0000_0000-0x0000_ffff Kernel (64K)
125 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
127 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
129 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
131 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
133 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
135 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
136 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
138 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
139 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
145 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
146 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
147 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
148 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
150 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
152 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
154 SysMessage(_("mapping main RAM failed"));
158 psxP = &psxM[0x200000];
159 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
160 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
162 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
163 psxR == NULL || psxP == NULL || psxH == NULL) {
164 SysMessage(_("Error allocating memory!"));
170 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
172 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
173 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
175 psxMemRLUT[0x1f00] = (u8 *)psxP;
176 psxMemRLUT[0x1f80] = (u8 *)psxH;
178 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
180 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
181 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
184 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
186 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
187 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
189 // Don't allow writes to PIO Expansion region (psxP) to take effect.
190 // NOTE: Not sure if this is needed to fix any games but seems wise,
191 // seeing as some games do read from PIO as part of copy-protection
192 // check. (See fix in psxMemReset() regarding psxP region reads).
193 psxMemWLUT[0x1f00] = NULL;
194 psxMemWLUT[0x1f80] = (u8 *)psxH;
203 memset(psxM, 0, 0x00200000);
204 memset(psxP, 0xff, 0x00010000);
208 if (strcmp(Config.Bios, "HLE") != 0) {
209 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
210 f = fopen(bios, "rb");
213 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
214 memset(psxR, 0, 0x80000);
216 if (fread(psxR, 1, 0x80000, f) == 0x80000) {
219 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
226 void psxMemShutdown() {
227 psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
228 psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
229 psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
231 free(psxMemRLUT); psxMemRLUT = NULL;
232 free(psxMemWLUT); psxMemWLUT = NULL;
235 u8 psxMemRead8(u32 mem) {
240 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
241 if ((mem & 0xffff) < 0x400)
244 return psxHwRead8(mem);
246 p = (char *)(psxMemRLUT[t]);
249 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
250 return *(u8 *)(p + (mem & 0xffff));
253 PSXMEM_LOG("err lb %8.8lx\n", mem);
260 u16 psxMemRead16(u32 mem) {
265 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
266 if ((mem & 0xffff) < 0x400)
269 return psxHwRead16(mem);
271 p = (char *)(psxMemRLUT[t]);
274 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
275 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
278 PSXMEM_LOG("err lh %8.8lx\n", mem);
285 u32 psxMemRead32(u32 mem) {
290 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
291 if ((mem & 0xffff) < 0x400)
294 return psxHwRead32(mem);
296 p = (char *)(psxMemRLUT[t]);
299 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
300 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
303 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
310 void psxMemWrite8(u32 mem, u8 value) {
315 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
316 if ((mem & 0xffff) < 0x400)
319 psxHwWrite8(mem, value);
321 p = (char *)(psxMemWLUT[t]);
324 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
325 *(u8 *)(p + (mem & 0xffff)) = value;
327 psxCpu->Clear((mem & (~3)), 1);
331 PSXMEM_LOG("err sb %8.8lx\n", mem);
337 void psxMemWrite16(u32 mem, u16 value) {
342 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
343 if ((mem & 0xffff) < 0x400)
344 psxHu16ref(mem) = SWAPu16(value);
346 psxHwWrite16(mem, value);
348 p = (char *)(psxMemWLUT[t]);
351 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
352 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
354 psxCpu->Clear((mem & (~3)), 1);
358 PSXMEM_LOG("err sh %8.8lx\n", mem);
364 void psxMemWrite32(u32 mem, u32 value) {
368 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
370 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
371 if ((mem & 0xffff) < 0x400)
372 psxHu32ref(mem) = SWAPu32(value);
374 psxHwWrite32(mem, value);
376 p = (char *)(psxMemWLUT[t]);
379 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
380 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
382 psxCpu->Clear(mem, 1);
385 if (mem != 0xfffe0130) {
388 psxCpu->Clear(mem, 1);
392 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
398 case 0x800: case 0x804:
399 if (writeok == 0) break;
401 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
402 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
403 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
404 /* Required for icache interpreter otherwise Armored Core won't boot on icache interpreter */
405 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_ISOLATED, NULL);
407 case 0x00: case 0x1e988:
408 if (writeok == 1) break;
410 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
411 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
412 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
413 /* Dynarecs might take this opportunity to flush their code cache */
414 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
418 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
427 void *psxMemPointer(u32 mem) {
432 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
433 if ((mem & 0xffff) < 0x400)
434 return (void *)&psxH[mem];
438 p = (char *)(psxMemWLUT[t]);
440 return (void *)(p + (mem & 0xffff));