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(...)
36 #define MAP_ANONYMOUS MAP_ANON
39 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
41 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
43 void *psxMap(unsigned long addr, size_t size, int is_fixed,
46 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
52 if (psxMapHook != NULL) {
53 ret = psxMapHook(addr, size, 0, tag);
58 /* avoid MAP_FIXED, it overrides existing mappings.. */
60 flags |= MAP_FIXED; */
63 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
64 if (ret == MAP_FAILED)
68 if (addr != 0 && ret != (void *)addr) {
69 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
73 psxUnmap(ret, size, tag);
77 if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2)
79 psxUnmap(ret, size, tag);
81 // try to use similarly aligned memory instead
82 // (recompiler needs this)
83 mask = try_ ? 0xffff : 0xffffff;
84 addr = ((unsigned long)ret + mask) & ~mask;
93 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
95 if (psxUnmapHook != NULL) {
96 psxUnmapHook(ptr, size, tag);
104 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
105 s8 *psxP = NULL; // Parallel Port (64K)
106 s8 *psxR = NULL; // BIOS ROM (512K)
107 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
109 u8 **psxMemWLUT = NULL;
110 u8 **psxMemRLUT = NULL;
112 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
113 0x0000_0000-0x0000_ffff Kernel (64K)
114 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
116 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
118 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
120 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
122 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
124 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
125 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
127 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
128 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
134 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
135 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
136 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
137 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
139 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
141 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
143 SysMessage(_("mapping main RAM failed"));
147 psxP = &psxM[0x200000];
148 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
149 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
151 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
152 psxR == NULL || psxP == NULL || psxH == NULL) {
153 SysMessage(_("Error allocating memory!"));
159 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
161 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
162 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
164 psxMemRLUT[0x1f00] = (u8 *)psxP;
165 psxMemRLUT[0x1f80] = (u8 *)psxH;
167 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
169 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
170 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
173 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
175 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
176 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
178 // Don't allow writes to PIO Expansion region (psxP) to take effect.
179 // NOTE: Not sure if this is needed to fix any games but seems wise,
180 // seeing as some games do read from PIO as part of copy-protection
181 // check. (See fix in psxMemReset() regarding psxP region reads).
182 psxMemWLUT[0x1f00] = NULL;
183 psxMemWLUT[0x1f80] = (u8 *)psxH;
192 memset(psxM, 0, 0x00200000);
193 memset(psxP, 0xff, 0x00010000);
195 if (strcmp(Config.Bios, "HLE") != 0) {
196 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
197 f = fopen(bios, "rb");
200 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
201 memset(psxR, 0, 0x80000);
204 fread(psxR, 1, 0x80000, f);
208 } else Config.HLE = TRUE;
211 void psxMemShutdown() {
212 psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
213 psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
214 psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
216 free(psxMemRLUT); psxMemRLUT = NULL;
217 free(psxMemWLUT); psxMemWLUT = NULL;
220 static int writeok = 1;
222 u8 psxMemRead8(u32 mem) {
227 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
228 if ((mem & 0xffff) < 0x400)
231 return psxHwRead8(mem);
233 p = (char *)(psxMemRLUT[t]);
236 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
237 return *(u8 *)(p + (mem & 0xffff));
240 PSXMEM_LOG("err lb %8.8lx\n", mem);
247 u16 psxMemRead16(u32 mem) {
252 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
253 if ((mem & 0xffff) < 0x400)
256 return psxHwRead16(mem);
258 p = (char *)(psxMemRLUT[t]);
261 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
262 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
265 PSXMEM_LOG("err lh %8.8lx\n", mem);
272 u32 psxMemRead32(u32 mem) {
277 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
278 if ((mem & 0xffff) < 0x400)
281 return psxHwRead32(mem);
283 p = (char *)(psxMemRLUT[t]);
286 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
287 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
290 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
297 void psxMemWrite8(u32 mem, u8 value) {
302 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
303 if ((mem & 0xffff) < 0x400)
306 psxHwWrite8(mem, value);
308 p = (char *)(psxMemWLUT[t]);
311 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
312 *(u8 *)(p + (mem & 0xffff)) = value;
314 psxCpu->Clear((mem & (~3)), 1);
318 PSXMEM_LOG("err sb %8.8lx\n", mem);
324 void psxMemWrite16(u32 mem, u16 value) {
329 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
330 if ((mem & 0xffff) < 0x400)
331 psxHu16ref(mem) = SWAPu16(value);
333 psxHwWrite16(mem, value);
335 p = (char *)(psxMemWLUT[t]);
338 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
339 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
341 psxCpu->Clear((mem & (~3)), 1);
345 PSXMEM_LOG("err sh %8.8lx\n", mem);
351 void psxMemWrite32(u32 mem, u32 value) {
355 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
357 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
358 if ((mem & 0xffff) < 0x400)
359 psxHu32ref(mem) = SWAPu32(value);
361 psxHwWrite32(mem, value);
363 p = (char *)(psxMemWLUT[t]);
366 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
367 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
369 psxCpu->Clear(mem, 1);
372 if (mem != 0xfffe0130) {
375 psxCpu->Clear(mem, 1);
379 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
385 case 0x800: case 0x804:
386 if (writeok == 0) break;
388 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
389 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
390 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
391 /* Required for icache interpreter otherwise Armored Core won't boot on icache interpreter */
392 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_ISOLATED, NULL);
394 case 0x00: case 0x1e988:
395 if (writeok == 1) break;
397 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
398 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
399 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
400 /* Dynarecs might take this opportunity to flush their code cache */
401 psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
405 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
414 void *psxMemPointer(u32 mem) {
419 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
420 if ((mem & 0xffff) < 0x400)
421 return (void *)&psxH[mem];
425 p = (char *)(psxMemWLUT[t]);
427 return (void *)(p + (mem & 0xffff));