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 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
44 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
46 void *psxMap(unsigned long addr, size_t size, int is_fixed,
50 #ifdef MAP_FIXED_NOREPLACE
51 int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE;
53 int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED;
56 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
64 if (psxMapHook != NULL) {
65 ret = psxMapHook(addr, size, 0, tag);
70 /* avoid MAP_FIXED, it overrides existing mappings.. */
72 flags |= MAP_FIXED; */
75 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
76 if (ret == MAP_FAILED)
80 if (addr != 0 && ret != (void *)addr) {
81 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
85 psxUnmap(ret, size, tag);
89 if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2)
91 psxUnmap(ret, size, tag);
93 // try to use similarly aligned memory instead
94 // (recompiler needs this)
95 mask = try_ ? 0xffff : 0xffffff;
96 addr = ((unsigned long)ret + mask) & ~mask;
105 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
107 if (psxUnmapHook != NULL) {
108 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
146 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
147 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
148 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
149 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
152 psxM = psxMap(0x30000000, 0x00210000, 1, MAP_TAG_RAM);
154 psxM = psxMap(0x70000000, 0x00210000, 1, MAP_TAG_RAM);
157 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
161 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
164 SysMessage(_("mapping main RAM failed"));
168 psxP = &psxM[0x200000];
170 psxH = psxMap(0x4f800000, 0x10000, 0, MAP_TAG_OTHER);
172 psxH = psxMap(0x8f800000, 0x10000, 0, MAP_TAG_OTHER);
174 psxR = psxMap(0x4fc00000, 0x80000, 0, MAP_TAG_OTHER);
176 psxR = psxMap(0x8fc00000, 0x80000, 0, MAP_TAG_OTHER);
178 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
179 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
182 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
183 psxR == NULL || psxP == NULL || psxH == NULL) {
184 SysMessage(_("Error allocating memory!"));
190 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
192 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
193 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
195 psxMemRLUT[0x1f00] = (u8 *)psxP;
196 psxMemRLUT[0x1f80] = (u8 *)psxH;
198 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
200 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
201 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
204 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
206 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
207 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
209 psxMemWLUT[0x1f00] = (u8 *)psxP;
210 psxMemWLUT[0x1f80] = (u8 *)psxH;
219 memset(psxM, 0, 0x00200000);
220 memset(psxP, 0xff, 0x00010000);
222 if (strcmp(Config.Bios, "HLE") != 0) {
223 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
224 f = fopen(bios, "rb");
227 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
228 memset(psxR, 0, 0x80000);
231 fread(psxR, 1, 0x80000, f);
235 } else Config.HLE = TRUE;
238 void psxMemShutdown() {
239 psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
240 psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
241 psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
243 free(psxMemRLUT); psxMemRLUT = NULL;
244 free(psxMemWLUT); psxMemWLUT = NULL;
247 static int writeok = 1;
249 u8 psxMemRead8(u32 mem) {
254 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
255 if ((mem & 0xffff) < 0x400)
258 return psxHwRead8(mem);
260 p = (char *)(psxMemRLUT[t]);
263 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
264 return *(u8 *)(p + (mem & 0xffff));
267 PSXMEM_LOG("err lb %8.8lx\n", mem);
274 u16 psxMemRead16(u32 mem) {
279 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
280 if ((mem & 0xffff) < 0x400)
283 return psxHwRead16(mem);
285 p = (char *)(psxMemRLUT[t]);
288 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
289 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
292 PSXMEM_LOG("err lh %8.8lx\n", mem);
299 u32 psxMemRead32(u32 mem) {
304 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
305 if ((mem & 0xffff) < 0x400)
308 return psxHwRead32(mem);
310 p = (char *)(psxMemRLUT[t]);
313 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
314 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
317 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
324 void psxMemWrite8(u32 mem, u8 value) {
329 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
330 if ((mem & 0xffff) < 0x400)
333 psxHwWrite8(mem, value);
335 p = (char *)(psxMemWLUT[t]);
338 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
339 *(u8 *)(p + (mem & 0xffff)) = value;
341 psxCpu->Clear((mem & (~3)), 1);
345 PSXMEM_LOG("err sb %8.8lx\n", mem);
351 void psxMemWrite16(u32 mem, u16 value) {
356 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
357 if ((mem & 0xffff) < 0x400)
358 psxHu16ref(mem) = SWAPu16(value);
360 psxHwWrite16(mem, value);
362 p = (char *)(psxMemWLUT[t]);
365 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
366 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
368 psxCpu->Clear((mem & (~3)), 1);
372 PSXMEM_LOG("err sh %8.8lx\n", mem);
378 void psxMemWrite32(u32 mem, u32 value) {
382 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
384 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
385 if ((mem & 0xffff) < 0x400)
386 psxHu32ref(mem) = SWAPu32(value);
388 psxHwWrite32(mem, value);
390 p = (char *)(psxMemWLUT[t]);
393 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
394 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
396 psxCpu->Clear(mem, 1);
399 if (mem != 0xfffe0130) {
402 psxCpu->Clear(mem, 1);
406 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
412 case 0x800: case 0x804:
413 if (writeok == 0) break;
415 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
416 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
417 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
419 case 0x00: case 0x1e988:
420 if (writeok == 1) break;
422 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
423 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
424 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
428 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
437 void *psxMemPointer(u32 mem) {
442 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
443 if ((mem & 0xffff) < 0x400)
444 return (void *)&psxH[mem];
448 p = (char *)(psxMemWLUT[t]);
450 return (void *)(p + (mem & 0xffff));