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(...)
33 #include "lightrec/mem.h"
36 #ifdef USE_LIBRETRO_VFS
37 #include <streams/file_stream_transforms.h>
41 #define MAP_ANONYMOUS MAP_ANON
44 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
46 void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag);
48 void *psxMap(unsigned long addr, size_t size, int is_fixed,
51 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
57 if (psxMapHook != NULL) {
58 ret = psxMapHook(addr, size, 0, tag);
63 /* avoid MAP_FIXED, it overrides existing mappings.. */
65 flags |= MAP_FIXED; */
67 req = (void *)(uintptr_t)addr;
68 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
69 if (ret == MAP_FAILED)
73 if (addr != 0 && ret != (void *)(uintptr_t)addr) {
74 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
78 psxUnmap(ret, size, tag);
82 if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2)
84 psxUnmap(ret, size, tag);
86 // try to use similarly aligned memory instead
87 // (recompiler needs this)
88 mask = try_ ? 0xffff : 0xffffff;
89 addr = ((uintptr_t)ret + mask) & ~mask;
98 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
100 if (psxUnmapHook != NULL) {
101 psxUnmapHook(ptr, size, tag);
109 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
110 s8 *psxP = NULL; // Parallel Port (64K)
111 s8 *psxR = NULL; // BIOS ROM (512K)
112 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
114 u8 **psxMemWLUT = NULL;
115 u8 **psxMemRLUT = NULL;
117 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
118 0x0000_0000-0x0000_ffff Kernel (64K)
119 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
121 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
123 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
125 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
127 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
129 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
130 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
132 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
133 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
136 static int psxMemInitMap(void)
138 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
139 if (psxM == MAP_FAILED)
140 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
141 if (psxM == MAP_FAILED) {
142 SysMessage(_("mapping main RAM failed"));
146 psxP = &psxM[0x200000];
148 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
149 if (psxH == MAP_FAILED) {
150 SysMessage(_("Error allocating memory!"));
155 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
156 if (psxR == MAP_FAILED) {
157 SysMessage(_("Error allocating memory!"));
165 static void psxMemFreeMap(void)
167 if (psxM) psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
168 if (psxH) psxUnmap(psxH, 0x10000, MAP_TAG_OTHER);
169 if (psxR) psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
170 psxM = psxH = psxR = NULL;
179 if (LIGHTREC_CUSTOM_MAP)
180 ret = lightrec_init_mmap();
182 ret = psxMemInitMap();
184 SysMessage(_("Error allocating memory!"));
189 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
190 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
192 if (psxMemRLUT == NULL || psxMemWLUT == NULL) {
193 SysMessage(_("Error allocating memory!"));
198 memset(psxMemRLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
199 memset(psxMemWLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
202 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
204 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
205 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
207 psxMemRLUT[0x1f00] = (u8 *)psxP;
208 psxMemRLUT[0x1f80] = (u8 *)psxH;
210 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
212 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
213 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
216 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
218 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
219 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
221 // Don't allow writes to PIO Expansion region (psxP) to take effect.
222 // NOTE: Not sure if this is needed to fix any games but seems wise,
223 // seeing as some games do read from PIO as part of copy-protection
224 // check. (See fix in psxMemReset() regarding psxP region reads).
225 psxMemWLUT[0x1f00] = INVALID_PTR;
226 psxMemWLUT[0x1f80] = (u8 *)psxH;
235 memset(psxM, 0, 0x00200000);
236 memset(psxP, 0xff, 0x00010000);
240 if (strcmp(Config.Bios, "HLE") != 0) {
241 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
242 f = fopen(bios, "rb");
245 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
246 memset(psxR, 0, 0x80000);
248 if (fread(psxR, 1, 0x80000, f) == 0x80000) {
251 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
258 void psxMemShutdown() {
259 if (LIGHTREC_CUSTOM_MAP)
260 lightrec_free_mmap();
264 free(psxMemRLUT); psxMemRLUT = NULL;
265 free(psxMemWLUT); psxMemWLUT = NULL;
268 void psxMemOnIsolate(int enable)
271 memset(psxMemWLUT + 0x0000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
272 memset(psxMemWLUT + 0x8000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
273 //memset(psxMemWLUT + 0xa000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
276 for (i = 0; i < 0x80; i++)
277 psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
278 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
279 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
281 psxCpu->Notify(enable ? R3000ACPU_NOTIFY_CACHE_ISOLATED
282 : R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
285 u8 psxMemRead8(u32 mem) {
290 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
291 if ((mem & 0xffff) < 0x400)
294 return psxHwRead8(mem);
296 p = (char *)(psxMemRLUT[t]);
297 if (p != INVALID_PTR) {
299 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
300 return *(u8 *)(p + (mem & 0xffff));
303 PSXMEM_LOG("err lb %8.8lx\n", mem);
310 u16 psxMemRead16(u32 mem) {
315 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
316 if ((mem & 0xffff) < 0x400)
319 return psxHwRead16(mem);
321 p = (char *)(psxMemRLUT[t]);
322 if (p != INVALID_PTR) {
324 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
325 return SWAPu16(*(u16 *)(p + (mem & 0xffff)));
328 PSXMEM_LOG("err lh %8.8lx\n", mem);
335 u32 psxMemRead32(u32 mem) {
340 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
341 if ((mem & 0xffff) < 0x400)
344 return psxHwRead32(mem);
346 p = (char *)(psxMemRLUT[t]);
347 if (p != INVALID_PTR) {
349 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
350 return SWAPu32(*(u32 *)(p + (mem & 0xffff)));
352 if (mem == 0xfffe0130)
353 return psxRegs.biuReg;
355 PSXMEM_LOG("err lw %8.8lx\n", mem);
362 void psxMemWrite8(u32 mem, u8 value) {
367 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
368 if ((mem & 0xffff) < 0x400)
371 psxHwWrite8(mem, value);
373 p = (char *)(psxMemWLUT[t]);
374 if (p != INVALID_PTR) {
376 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
377 *(u8 *)(p + (mem & 0xffff)) = value;
379 psxCpu->Clear((mem & (~3)), 1);
383 PSXMEM_LOG("err sb %8.8lx\n", mem);
389 void psxMemWrite16(u32 mem, u16 value) {
394 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
395 if ((mem & 0xffff) < 0x400)
396 psxHu16ref(mem) = SWAPu16(value);
398 psxHwWrite16(mem, value);
400 p = (char *)(psxMemWLUT[t]);
401 if (p != INVALID_PTR) {
403 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
404 *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value);
406 psxCpu->Clear((mem & (~3)), 1);
410 PSXMEM_LOG("err sh %8.8lx\n", mem);
416 void psxMemWrite32(u32 mem, u32 value) {
420 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
422 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
423 if ((mem & 0xffff) < 0x400)
424 psxHu32ref(mem) = SWAPu32(value);
426 psxHwWrite32(mem, value);
428 p = (char *)(psxMemWLUT[t]);
429 if (p != INVALID_PTR) {
431 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
432 *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value);
434 psxCpu->Clear(mem, 1);
437 if (mem == 0xfffe0130) {
438 psxRegs.biuReg = value;
442 PSXMEM_LOG("err sw %8.8lx\n", mem);
448 void *psxMemPointer(u32 mem) {
453 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
454 if ((mem & 0xffff) < 0x400)
455 return (void *)&psxH[mem];
459 p = (char *)(psxMemWLUT[t]);
460 if (p != INVALID_PTR) {
461 return (void *)(p + (mem & 0xffff));