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"
35 #define MAP_ANONYMOUS MAP_ANON
38 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
40 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
42 void *psxMap(unsigned long addr, size_t size, int is_fixed,
45 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
51 if (psxMapHook != NULL) {
52 ret = psxMapHook(addr, size, 0, tag);
57 /* avoid MAP_FIXED, it overrides existing mappings.. */
59 flags |= MAP_FIXED; */
62 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
63 if (ret == MAP_FAILED)
67 if (addr != 0 && ret != (void *)addr) {
68 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
72 psxUnmap(ret, size, tag);
76 if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2)
78 psxUnmap(ret, size, tag);
80 // try to use similarly aligned memory instead
81 // (recompiler needs this)
82 mask = try_ ? 0xffff : 0xffffff;
83 addr = ((unsigned long)ret + mask) & ~mask;
92 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
94 if (psxUnmapHook != NULL) {
95 psxUnmapHook(ptr, size, tag);
103 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
104 s8 *psxP = NULL; // Parallel Port (64K)
105 s8 *psxR = NULL; // BIOS ROM (512K)
106 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
108 u8 **psxMemWLUT = NULL;
109 u8 **psxMemRLUT = NULL;
111 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
112 0x0000_0000-0x0000_ffff Kernel (64K)
113 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
115 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
117 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
119 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
121 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
123 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
124 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
126 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
127 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
133 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
134 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
135 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
136 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
138 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
141 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
144 SysMessage(_("mapping main RAM failed"));
148 psxP = &psxM[0x200000];
149 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
150 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
152 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
153 psxR == NULL || psxP == NULL || psxH == NULL) {
154 SysMessage(_("Error allocating memory!"));
160 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
162 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
163 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
165 psxMemRLUT[0x1f00] = (u8 *)psxP;
166 psxMemRLUT[0x1f80] = (u8 *)psxH;
168 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
170 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
171 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
174 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
176 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
177 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
179 // Don't allow writes to PIO Expansion region (psxP) to take effect.
180 // NOTE: Not sure if this is needed to fix any games but seems wise,
181 // seeing as some games do read from PIO as part of copy-protection
182 // check. (See fix in psxMemReset() regarding psxP region reads).
183 psxMemWLUT[0x1f00] = NULL;
184 psxMemWLUT[0x1f80] = (u8 *)psxH;
193 memset(psxM, 0, 0x00200000);
194 memset(psxP, 0xff, 0x00010000);
196 if (strcmp(Config.Bios, "HLE") != 0) {
197 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
198 f = fopen(bios, "rb");
201 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
202 memset(psxR, 0, 0x80000);
205 fread(psxR, 1, 0x80000, f);
209 } else Config.HLE = TRUE;
212 void psxMemShutdown() {
213 psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
214 psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
215 psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
217 free(psxMemRLUT); psxMemRLUT = NULL;
218 free(psxMemWLUT); psxMemWLUT = NULL;
221 static int writeok = 1;
223 u8 psxMemRead8(u32 mem) {
228 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
229 if ((mem & 0xffff) < 0x400)
232 return psxHwRead8(mem);
234 p = (char *)(psxMemRLUT[t]);
237 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
238 return *(u8 *)(p + (mem & 0xffff));
241 PSXMEM_LOG("err lb %8.8lx\n", mem);
248 u16 psxMemRead16(u32 mem) {
253 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
254 if ((mem & 0xffff) < 0x400)
257 return psxHwRead16(mem);
259 p = (char *)(psxMemRLUT[t]);
262 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
263 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
266 PSXMEM_LOG("err lh %8.8lx\n", mem);
273 u32 psxMemRead32(u32 mem) {
278 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
279 if ((mem & 0xffff) < 0x400)
282 return psxHwRead32(mem);
284 p = (char *)(psxMemRLUT[t]);
287 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
288 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
291 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
298 void psxMemWrite8(u32 mem, u8 value) {
303 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
304 if ((mem & 0xffff) < 0x400)
307 psxHwWrite8(mem, value);
309 p = (char *)(psxMemWLUT[t]);
312 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
313 *(u8 *)(p + (mem & 0xffff)) = value;
315 psxCpu->Clear((mem & (~3)), 1);
319 PSXMEM_LOG("err sb %8.8lx\n", mem);
325 void psxMemWrite16(u32 mem, u16 value) {
330 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
331 if ((mem & 0xffff) < 0x400)
332 psxHu16ref(mem) = SWAPu16(value);
334 psxHwWrite16(mem, value);
336 p = (char *)(psxMemWLUT[t]);
339 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
340 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
342 psxCpu->Clear((mem & (~3)), 1);
346 PSXMEM_LOG("err sh %8.8lx\n", mem);
352 void psxMemWrite32(u32 mem, u32 value) {
356 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
358 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
359 if ((mem & 0xffff) < 0x400)
360 psxHu32ref(mem) = SWAPu32(value);
362 psxHwWrite32(mem, value);
364 p = (char *)(psxMemWLUT[t]);
367 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
368 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
370 psxCpu->Clear(mem, 1);
373 if (mem != 0xfffe0130) {
376 psxCpu->Clear(mem, 1);
380 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
386 case 0x800: case 0x804:
387 if (writeok == 0) break;
389 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
390 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
391 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
393 case 0x00: case 0x1e988:
394 if (writeok == 1) break;
396 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
397 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
398 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
402 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
411 void *psxMemPointer(u32 mem) {
416 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
417 if ((mem & 0xffff) < 0x400)
418 return (void *)&psxH[mem];
422 p = (char *)(psxMemWLUT[t]);
424 return (void *)(p + (mem & 0xffff));