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 static void * psxMapDefault(unsigned long addr, size_t size,
45 int is_fixed, enum psxMapTag tag)
49 ptr = calloc(1, size);
50 return ptr ? ptr : MAP_FAILED;
52 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
54 ptr = mmap((void *)(uintptr_t)addr, size,
55 PROT_READ | PROT_WRITE, flags, -1, 0);
57 if (size >= 2*1024*1024) {
58 if (ptr != MAP_FAILED && ((uintptr_t)ptr & (2*1024*1024 - 1))) {
59 // try to manually realign assuming bottom-to-top alloc
61 addr = (uintptr_t)ptr & ~(2*1024*1024 - 1);
62 ptr = mmap((void *)(uintptr_t)addr, size,
63 PROT_READ | PROT_WRITE, flags, -1, 0);
65 if (ptr != MAP_FAILED)
66 madvise(ptr, size, MADV_HUGEPAGE);
73 static void psxUnmapDefault(void *ptr, size_t size, enum psxMapTag tag)
82 void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed,
83 enum psxMapTag tag) = psxMapDefault;
84 void (*psxUnmapHook)(void *ptr, size_t size,
85 enum psxMapTag tag) = psxUnmapDefault;
87 void *psxMap(unsigned long addr, size_t size, int is_fixed,
95 ret = psxMapHook(addr, size, 0, tag);
99 if (addr != 0 && ret != (void *)(uintptr_t)addr) {
100 SysMessage("psxMap: warning: wanted to map @%08x, got %p\n",
104 psxUnmap(ret, size, tag);
108 if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2)
110 psxUnmap(ret, size, tag);
112 // try to use similarly aligned memory instead
113 // (recompiler needs this)
114 mask = try_ ? 0xffff : 0xffffff;
115 addr = ((uintptr_t)ret + mask) & ~mask;
124 void psxUnmap(void *ptr, size_t size, enum psxMapTag tag)
126 psxUnmapHook(ptr, size, tag);
129 s8 *psxM = NULL; // Kernel & User Memory (2 Meg)
130 s8 *psxP = NULL; // Parallel Port (64K)
131 s8 *psxR = NULL; // BIOS ROM (512K)
132 s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K)
134 u8 **psxMemWLUT = NULL;
135 u8 **psxMemRLUT = NULL;
137 /* Playstation Memory Map (from Playstation doc by Joshua Walker)
138 0x0000_0000-0x0000_ffff Kernel (64K)
139 0x0001_0000-0x001f_ffff User Memory (1.9 Meg)
141 0x1f00_0000-0x1f00_ffff Parallel Port (64K)
143 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes)
145 0x1f80_1000-0x1f80_2fff Hardware Registers (8K)
147 0x1fc0_0000-0x1fc7_ffff BIOS (512K)
149 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached
150 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached
152 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached
153 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached
156 static int psxMemInitMap(void)
158 psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM);
159 if (psxM == MAP_FAILED)
160 psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM);
161 if (psxM == MAP_FAILED) {
162 SysMessage(_("mapping main RAM failed"));
166 psxP = &psxM[0x200000];
168 psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER);
169 if (psxH == MAP_FAILED) {
170 SysMessage(_("Error allocating memory!"));
175 psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER);
176 if (psxR == MAP_FAILED) {
177 SysMessage(_("Error allocating memory!"));
185 static void psxMemFreeMap(void)
187 if (psxM) psxUnmap(psxM, 0x00210000, MAP_TAG_RAM);
188 if (psxH) psxUnmap(psxH, 0x10000, MAP_TAG_OTHER);
189 if (psxR) psxUnmap(psxR, 0x80000, MAP_TAG_OTHER);
190 psxM = psxH = psxR = NULL;
199 if (LIGHTREC_CUSTOM_MAP)
200 ret = lightrec_init_mmap();
202 ret = psxMemInitMap();
204 SysMessage(_("Error allocating memory!"));
209 if (DISABLE_MEM_LUTS)
212 psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *));
213 psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *));
215 if (psxMemRLUT == NULL || psxMemWLUT == NULL) {
216 SysMessage(_("Error allocating memory!"));
221 memset(psxMemRLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
222 memset(psxMemWLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *));
225 for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
227 memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *));
228 memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *));
230 psxMemRLUT[0x1f00] = (u8 *)psxP;
231 psxMemRLUT[0x1f80] = (u8 *)psxH;
233 for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16];
235 memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
236 memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *));
239 for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16];
241 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
242 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
244 // Don't allow writes to PIO Expansion region (psxP) to take effect.
245 // NOTE: Not sure if this is needed to fix any games but seems wise,
246 // seeing as some games do read from PIO as part of copy-protection
247 // check. (See fix in psxMemReset() regarding psxP region reads).
248 psxMemWLUT[0x1f00] = INVALID_PTR;
249 psxMemWLUT[0x1f80] = (u8 *)psxH;
258 memset(psxM, 0, 0x00200000);
259 memset(psxP, 0xff, 0x00010000);
263 if (strcmp(Config.Bios, "HLE") != 0) {
264 sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios);
265 f = fopen(bios, "rb");
268 SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios);
269 memset(psxR, 0, 0x80000);
271 if (fread(psxR, 1, 0x80000, f) == 0x80000) {
274 SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios);
281 void psxMemShutdown() {
282 if (LIGHTREC_CUSTOM_MAP)
283 lightrec_free_mmap();
287 free(psxMemRLUT); psxMemRLUT = NULL;
288 free(psxMemWLUT); psxMemWLUT = NULL;
293 void psxMemOnIsolate(int enable)
295 if (!DISABLE_MEM_LUTS) {
297 memset(psxMemWLUT + 0x0000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
298 memset(psxMemWLUT + 0x8000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
299 //memset(psxMemWLUT + 0xa000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *));
302 for (i = 0; i < 0x80; i++)
303 psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16];
304 memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *));
305 memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *));
309 cache_isolated = enable;
310 psxCpu->Notify(enable ? R3000ACPU_NOTIFY_CACHE_ISOLATED
311 : R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL);
314 u8 psxMemRead8(u32 mem) {
319 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
320 if ((mem & 0xffff) < 0x400)
323 return psxHwRead8(mem);
326 if (p != INVALID_PTR) {
328 DebugCheckBP((mem & 0xffffff) | 0x80000000, R1);
332 PSXMEM_LOG("err lb %8.8lx\n", mem);
339 u16 psxMemRead16(u32 mem) {
344 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
345 if ((mem & 0xffff) < 0x400)
348 return psxHwRead16(mem);
351 if (p != INVALID_PTR) {
353 DebugCheckBP((mem & 0xffffff) | 0x80000000, R2);
354 return SWAPu16(*(u16 *)p);
357 PSXMEM_LOG("err lh %8.8lx\n", mem);
364 u32 psxMemRead32(u32 mem) {
369 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
370 if ((mem & 0xffff) < 0x400)
373 return psxHwRead32(mem);
376 if (p != INVALID_PTR) {
378 DebugCheckBP((mem & 0xffffff) | 0x80000000, R4);
379 return SWAPu32(*(u32 *)p);
381 if (mem == 0xfffe0130)
382 return psxRegs.biuReg;
384 PSXMEM_LOG("err lw %8.8lx\n", mem);
391 void psxMemWrite8(u32 mem, u32 value) {
396 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
397 if ((mem & 0xffff) < 0x400)
400 psxHwWrite8(mem, value);
403 if (p != INVALID_PTR) {
405 DebugCheckBP((mem & 0xffffff) | 0x80000000, W1);
408 psxCpu->Clear((mem & (~3)), 1);
412 PSXMEM_LOG("err sb %8.8lx\n", mem);
418 void psxMemWrite16(u32 mem, u32 value) {
423 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
424 if ((mem & 0xffff) < 0x400)
425 psxHu16ref(mem) = SWAPu16(value);
427 psxHwWrite16(mem, value);
430 if (p != INVALID_PTR) {
432 DebugCheckBP((mem & 0xffffff) | 0x80000000, W2);
433 *(u16 *)p = SWAPu16(value);
435 psxCpu->Clear((mem & (~3)), 1);
439 PSXMEM_LOG("err sh %8.8lx\n", mem);
445 void psxMemWrite32(u32 mem, u32 value) {
449 // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n");
451 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
452 if ((mem & 0xffff) < 0x400)
453 psxHu32ref(mem) = SWAPu32(value);
455 psxHwWrite32(mem, value);
458 if (p != INVALID_PTR) {
460 DebugCheckBP((mem & 0xffffff) | 0x80000000, W4);
461 *(u32 *)p = SWAPu32(value);
463 psxCpu->Clear(mem, 1);
466 if (mem == 0xfffe0130) {
467 psxRegs.biuReg = value;
471 PSXMEM_LOG("err sw %8.8lx\n", mem);
477 void *psxMemPointer(u32 mem) {
482 if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) {
483 if ((mem & 0xffff) < 0x400)
484 return (void *)&psxH[mem];
489 if (p != INVALID_PTR) {