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
43 void DebugCheckBP(u32 address, enum breakpoint_types type) {}
46 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
48 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
50 void *psxMap(unsigned long addr, size_t size, int is_fixed,
54 #ifdef MAP_FIXED_NOREPLACE
55 int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE;
57 int flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED;
60 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
68 if (psxMapHook != NULL) {
69 ret = psxMapHook(addr, size, 0, tag);
74 /* avoid MAP_FIXED, it overrides existing mappings.. */
76 flags |= MAP_FIXED; */
79 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
80 if (ret == MAP_FAILED)
84 if (addr != 0 && ret != (void *)addr) {
85 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
89 psxUnmap(ret, size, tag);
93 if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2)
95 psxUnmap(ret, size, tag);
97 // try to use similarly aligned memory instead
98 // (recompiler needs this)
99 mask = try_ ? 0xffff : 0xffffff;
100 addr = ((unsigned long)ret + mask) & ~mask;
109 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
111 if (psxUnmapHook != NULL) {
112 psxUnmapHook(ptr, size, tag);
120 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
121 s8 *psxP = NULL; // Parallel Port (64K)
122 s8 *psxR = NULL; // BIOS ROM (512K)
123 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
125 u8 **psxMemWLUT = NULL;
126 u8 **psxMemRLUT = NULL;
128 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
129 0x0000_0000-0x0000_ffff Kernel (64K)
130 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
132 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
134 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
136 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
138 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
140 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
141 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
143 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
144 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
150 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
151 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
152 memset(psxMemRLUT, 0, 0x10000 * sizeof(void *));
153 memset(psxMemWLUT, 0, 0x10000 * sizeof(void *));
156 psxM = psxMap(0x30000000, 0x00210000, 1, MAP_TAG_RAM);
158 psxM = psxMap(0x70000000, 0x00210000, 1, MAP_TAG_RAM);
161 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
165 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
168 SysMessage(_("mapping main RAM failed"));
172 psxP = &psxM[0x200000];
174 psxH = psxMap(0x4f800000, 0x10000, 0, MAP_TAG_OTHER);
176 psxH = psxMap(0x8f800000, 0x10000, 0, MAP_TAG_OTHER);
178 psxR = psxMap(0x4fc00000, 0x80000, 0, MAP_TAG_OTHER);
180 psxR = psxMap(0x8fc00000, 0x80000, 0, MAP_TAG_OTHER);
182 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
183 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
186 if (psxMemRLUT == NULL || psxMemWLUT == NULL ||
187 psxR == NULL || psxP == NULL || psxH == NULL) {
188 SysMessage(_("Error allocating memory!"));
194 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
196 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
197 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
199 psxMemRLUT[0x1f00] = (u8 *)psxP;
200 psxMemRLUT[0x1f80] = (u8 *)psxH;
202 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
204 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
205 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
208 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
210 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
211 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
213 psxMemWLUT[0x1f00] = (u8 *)psxP;
214 psxMemWLUT[0x1f80] = (u8 *)psxH;
223 memset(psxM, 0, 0x00200000);
224 memset(psxP, 0xff, 0x00010000);
226 if (strcmp(Config.Bios, "HLE") != 0) {
227 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
228 f = fopen(bios, "rb");
231 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
232 memset(psxR, 0, 0x80000);
235 fread(psxR, 1, 0x80000, f);
239 } else Config.HLE = TRUE;
242 void psxMemShutdown() {
243 psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL;
244 psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL;
245 psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL;
247 free(psxMemRLUT); psxMemRLUT = NULL;
248 free(psxMemWLUT); psxMemWLUT = NULL;
251 static int writeok = 1;
253 u8 psxMemRead8(u32 mem) {
258 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
259 if ((mem & 0xffff) < 0x400)
262 return psxHwRead8(mem);
264 p = (char *)(psxMemRLUT[t]);
267 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
268 return *(u8 *)(p + (mem & 0xffff));
271 PSXMEM_LOG("err lb %8.8lx\n", mem);
278 u16 psxMemRead16(u32 mem) {
283 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
284 if ((mem & 0xffff) < 0x400)
287 return psxHwRead16(mem);
289 p = (char *)(psxMemRLUT[t]);
292 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
293 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
296 PSXMEM_LOG("err lh %8.8lx\n", mem);
303 u32 psxMemRead32(u32 mem) {
308 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
309 if ((mem & 0xffff) < 0x400)
312 return psxHwRead32(mem);
314 p = (char *)(psxMemRLUT[t]);
317 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
318 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
321 if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); }
328 void psxMemWrite8(u32 mem, u8 value) {
333 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
334 if ((mem & 0xffff) < 0x400)
337 psxHwWrite8(mem, value);
339 p = (char *)(psxMemWLUT[t]);
342 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
343 *(u8 *)(p + (mem & 0xffff)) = value;
345 psxCpu->Clear((mem & (~3)), 1);
349 PSXMEM_LOG("err sb %8.8lx\n", mem);
355 void psxMemWrite16(u32 mem, u16 value) {
360 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
361 if ((mem & 0xffff) < 0x400)
362 psxHu16ref(mem) = SWAPu16(value);
364 psxHwWrite16(mem, value);
366 p = (char *)(psxMemWLUT[t]);
369 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
370 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
372 psxCpu->Clear((mem & (~3)), 1);
376 PSXMEM_LOG("err sh %8.8lx\n", mem);
382 void psxMemWrite32(u32 mem, u32 value) {
386 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
388 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
389 if ((mem & 0xffff) < 0x400)
390 psxHu32ref(mem) = SWAPu32(value);
392 psxHwWrite32(mem, value);
394 p = (char *)(psxMemWLUT[t]);
397 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
398 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
400 psxCpu->Clear(mem, 1);
403 if (mem != 0xfffe0130) {
406 psxCpu->Clear(mem, 1);
410 if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); }
416 case 0x800: case 0x804:
417 if (writeok == 0) break;
419 memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *));
420 memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *));
421 memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *));
423 case 0x00: case 0x1e988:
424 if (writeok == 1) break;
426 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
427 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
428 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
432 PSXMEM_LOG("unk %8.8lx = %x\n", mem, value);
441 void *psxMemPointer(u32 mem) {
446 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
447 if ((mem & 0xffff) < 0x400)
448 return (void *)&psxH[mem];
452 p = (char *)(psxMemWLUT[t]);
454 return (void *)(p + (mem & 0xffff));