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ef79bbde P |
1 | /*************************************************************************** |
2 | * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team * | |
3 | * * | |
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. * | |
8 | * * | |
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. * | |
13 | * * | |
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 | ***************************************************************************/ | |
19 | ||
20 | /* | |
21 | * PSX memory functions. | |
22 | */ | |
23 | ||
24 | // TODO: Implement caches & cycle penalty. | |
25 | ||
26 | #include "psxmem.h" | |
87e5b45f | 27 | #include "psxmem_map.h" |
ef79bbde P |
28 | #include "r3000a.h" |
29 | #include "psxhw.h" | |
7d7672a5 | 30 | //#include "debug.h" |
31 | #define DebugCheckBP(...) | |
ce0e7ac9 | 32 | |
7a8d521f | 33 | #include "lightrec/mem.h" |
ce0e7ac9 | 34 | #include "memmap.h" |
ef79bbde | 35 | |
7a8d521f | 36 | #ifdef USE_LIBRETRO_VFS |
37 | #include <streams/file_stream_transforms.h> | |
38 | #endif | |
39 | ||
ef79bbde P |
40 | #ifndef MAP_ANONYMOUS |
41 | #define MAP_ANONYMOUS MAP_ANON | |
42 | #endif | |
43 | ||
826ba56b PC |
44 | static void * psxMapDefault(unsigned long addr, size_t size, |
45 | int is_fixed, enum psxMapTag tag) | |
46 | { | |
47 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
48 | ||
49 | return mmap((void *)(uintptr_t)addr, size, | |
50 | PROT_READ | PROT_WRITE, flags, -1, 0); | |
51 | } | |
52 | ||
53 | static void psxUnmapDefault(void *ptr, size_t size, enum psxMapTag tag) | |
54 | { | |
55 | munmap(ptr, size); | |
56 | } | |
57 | ||
87e5b45f | 58 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
826ba56b PC |
59 | enum psxMapTag tag) = psxMapDefault; |
60 | void (*psxUnmapHook)(void *ptr, size_t size, | |
61 | enum psxMapTag tag) = psxUnmapDefault; | |
87e5b45f | 62 | |
63 | void *psxMap(unsigned long addr, size_t size, int is_fixed, | |
64 | enum psxMapTag tag) | |
65 | { | |
5644b26c | 66 | int try_ = 0; |
b0dd9956 | 67 | unsigned long mask; |
826ba56b | 68 | void *ret; |
87e5b45f | 69 | |
b0dd9956 | 70 | retry: |
826ba56b PC |
71 | ret = psxMapHook(addr, size, 0, tag); |
72 | if (ret == NULL) | |
73 | return MAP_FAILED; | |
87e5b45f | 74 | |
77e1e479 | 75 | if (addr != 0 && ret != (void *)(uintptr_t)addr) { |
b0dd9956 | 76 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", |
77 | addr, ret); | |
78 | ||
0069615f | 79 | if (is_fixed) { |
80 | psxUnmap(ret, size, tag); | |
7a8d521f | 81 | return MAP_FAILED; |
0069615f | 82 | } |
83 | ||
77e1e479 | 84 | if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2) |
b0dd9956 | 85 | { |
86 | psxUnmap(ret, size, tag); | |
87 | ||
88 | // try to use similarly aligned memory instead | |
89 | // (recompiler needs this) | |
5644b26c | 90 | mask = try_ ? 0xffff : 0xffffff; |
77e1e479 | 91 | addr = ((uintptr_t)ret + mask) & ~mask; |
5644b26c | 92 | try_++; |
b0dd9956 | 93 | goto retry; |
94 | } | |
95 | } | |
87e5b45f | 96 | |
97 | return ret; | |
98 | } | |
99 | ||
100 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
101 | { | |
826ba56b | 102 | psxUnmapHook(ptr, size, tag); |
87e5b45f | 103 | } |
104 | ||
ef79bbde P |
105 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) |
106 | s8 *psxP = NULL; // Parallel Port (64K) | |
107 | s8 *psxR = NULL; // BIOS ROM (512K) | |
108 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) | |
109 | ||
110 | u8 **psxMemWLUT = NULL; | |
111 | u8 **psxMemRLUT = NULL; | |
112 | ||
113 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) | |
114 | 0x0000_0000-0x0000_ffff Kernel (64K) | |
115 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) | |
116 | ||
117 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
118 | ||
119 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
120 | ||
121 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
122 | ||
123 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
124 | ||
125 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
126 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
127 | ||
128 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
129 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
130 | */ | |
131 | ||
7a8d521f | 132 | static int psxMemInitMap(void) |
133 | { | |
87e5b45f | 134 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
7a8d521f | 135 | if (psxM == MAP_FAILED) |
f23d3386 | 136 | psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM); |
7a8d521f | 137 | if (psxM == MAP_FAILED) { |
a327ad27 | 138 | SysMessage(_("mapping main RAM failed")); |
7a8d521f | 139 | psxM = NULL; |
a327ad27 | 140 | return -1; |
141 | } | |
ef79bbde | 142 | psxP = &psxM[0x200000]; |
7a8d521f | 143 | |
6d760c92 | 144 | psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER); |
7a8d521f | 145 | if (psxH == MAP_FAILED) { |
146 | SysMessage(_("Error allocating memory!")); | |
147 | psxMemShutdown(); | |
148 | return -1; | |
149 | } | |
150 | ||
87e5b45f | 151 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); |
7a8d521f | 152 | if (psxR == MAP_FAILED) { |
153 | SysMessage(_("Error allocating memory!")); | |
154 | psxMemShutdown(); | |
155 | return -1; | |
156 | } | |
ef79bbde | 157 | |
7a8d521f | 158 | return 0; |
159 | } | |
160 | ||
161 | static void psxMemFreeMap(void) | |
162 | { | |
163 | if (psxM) psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); | |
164 | if (psxH) psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); | |
165 | if (psxR) psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); | |
166 | psxM = psxH = psxR = NULL; | |
167 | psxP = NULL; | |
168 | } | |
169 | ||
170 | int psxMemInit(void) | |
171 | { | |
172 | unsigned int i; | |
173 | int ret; | |
174 | ||
175 | if (LIGHTREC_CUSTOM_MAP) | |
176 | ret = lightrec_init_mmap(); | |
177 | else | |
178 | ret = psxMemInitMap(); | |
179 | if (ret) { | |
180 | SysMessage(_("Error allocating memory!")); | |
181 | psxMemShutdown(); | |
182 | return -1; | |
183 | } | |
184 | ||
185 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
186 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
187 | ||
188 | if (psxMemRLUT == NULL || psxMemWLUT == NULL) { | |
ef79bbde | 189 | SysMessage(_("Error allocating memory!")); |
88901dd2 | 190 | psxMemShutdown(); |
ef79bbde P |
191 | return -1; |
192 | } | |
193 | ||
679d5ee3 | 194 | memset(psxMemRLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *)); |
195 | memset(psxMemWLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *)); | |
7a8d521f | 196 | |
ef79bbde P |
197 | // MemR |
198 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
199 | ||
200 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
201 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
202 | ||
203 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
204 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
205 | ||
206 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
207 | ||
208 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
209 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
210 | ||
211 | // MemW | |
212 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
213 | ||
214 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
215 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
216 | ||
fa18abb2 | 217 | // Don't allow writes to PIO Expansion region (psxP) to take effect. |
218 | // NOTE: Not sure if this is needed to fix any games but seems wise, | |
219 | // seeing as some games do read from PIO as part of copy-protection | |
220 | // check. (See fix in psxMemReset() regarding psxP region reads). | |
7a8d521f | 221 | psxMemWLUT[0x1f00] = INVALID_PTR; |
ef79bbde P |
222 | psxMemWLUT[0x1f80] = (u8 *)psxH; |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | void psxMemReset() { | |
228 | FILE *f = NULL; | |
229 | char bios[1024]; | |
230 | ||
231 | memset(psxM, 0, 0x00200000); | |
23643ee7 | 232 | memset(psxP, 0xff, 0x00010000); |
ef79bbde | 233 | |
7a8d521f | 234 | Config.HLE = TRUE; |
235 | ||
ef79bbde P |
236 | if (strcmp(Config.Bios, "HLE") != 0) { |
237 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
238 | f = fopen(bios, "rb"); | |
239 | ||
240 | if (f == NULL) { | |
241 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
242 | memset(psxR, 0, 0x80000); | |
ef79bbde | 243 | } else { |
7a8d521f | 244 | if (fread(psxR, 1, 0x80000, f) == 0x80000) { |
245 | Config.HLE = FALSE; | |
246 | } else { | |
247 | SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios); | |
248 | } | |
ef79bbde | 249 | fclose(f); |
ef79bbde | 250 | } |
7a8d521f | 251 | } |
ef79bbde P |
252 | } |
253 | ||
254 | void psxMemShutdown() { | |
7a8d521f | 255 | if (LIGHTREC_CUSTOM_MAP) |
256 | lightrec_free_mmap(); | |
257 | else | |
258 | psxMemFreeMap(); | |
ef79bbde | 259 | |
88901dd2 | 260 | free(psxMemRLUT); psxMemRLUT = NULL; |
261 | free(psxMemWLUT); psxMemWLUT = NULL; | |
ef79bbde P |
262 | } |
263 | ||
679d5ee3 | 264 | void psxMemOnIsolate(int enable) |
265 | { | |
266 | if (enable) { | |
267 | memset(psxMemWLUT + 0x0000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *)); | |
268 | memset(psxMemWLUT + 0x8000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *)); | |
269 | //memset(psxMemWLUT + 0xa000, (int)(uintptr_t)INVALID_PTR, 0x80 * sizeof(void *)); | |
270 | } else { | |
271 | int i; | |
272 | for (i = 0; i < 0x80; i++) | |
273 | psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
274 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
275 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
276 | } | |
277 | psxCpu->Notify(enable ? R3000ACPU_NOTIFY_CACHE_ISOLATED | |
278 | : R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL); | |
279 | } | |
ef79bbde P |
280 | |
281 | u8 psxMemRead8(u32 mem) { | |
282 | char *p; | |
283 | u32 t; | |
284 | ||
285 | t = mem >> 16; | |
9dd7d179 | 286 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
287 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
288 | return psxHu8(mem); |
289 | else | |
290 | return psxHwRead8(mem); | |
291 | } else { | |
292 | p = (char *)(psxMemRLUT[t]); | |
7a8d521f | 293 | if (p != INVALID_PTR) { |
ef79bbde P |
294 | if (Config.Debug) |
295 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
296 | return *(u8 *)(p + (mem & 0xffff)); | |
297 | } else { | |
298 | #ifdef PSXMEM_LOG | |
299 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
300 | #endif | |
943a507a | 301 | return 0xFF; |
ef79bbde P |
302 | } |
303 | } | |
304 | } | |
305 | ||
306 | u16 psxMemRead16(u32 mem) { | |
307 | char *p; | |
308 | u32 t; | |
309 | ||
310 | t = mem >> 16; | |
9dd7d179 | 311 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
312 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
313 | return psxHu16(mem); |
314 | else | |
315 | return psxHwRead16(mem); | |
316 | } else { | |
317 | p = (char *)(psxMemRLUT[t]); | |
7a8d521f | 318 | if (p != INVALID_PTR) { |
ef79bbde P |
319 | if (Config.Debug) |
320 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
321 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
322 | } else { | |
323 | #ifdef PSXMEM_LOG | |
324 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
325 | #endif | |
943a507a | 326 | return 0xFFFF; |
ef79bbde P |
327 | } |
328 | } | |
329 | } | |
330 | ||
331 | u32 psxMemRead32(u32 mem) { | |
332 | char *p; | |
333 | u32 t; | |
334 | ||
335 | t = mem >> 16; | |
9dd7d179 | 336 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
337 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
338 | return psxHu32(mem); |
339 | else | |
340 | return psxHwRead32(mem); | |
341 | } else { | |
342 | p = (char *)(psxMemRLUT[t]); | |
7a8d521f | 343 | if (p != INVALID_PTR) { |
ef79bbde P |
344 | if (Config.Debug) |
345 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
346 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
347 | } else { | |
679d5ee3 | 348 | if (mem == 0xfffe0130) |
349 | return psxRegs.biuReg; | |
ef79bbde | 350 | #ifdef PSXMEM_LOG |
679d5ee3 | 351 | PSXMEM_LOG("err lw %8.8lx\n", mem); |
ef79bbde | 352 | #endif |
943a507a | 353 | return 0xFFFFFFFF; |
ef79bbde P |
354 | } |
355 | } | |
356 | } | |
357 | ||
358 | void psxMemWrite8(u32 mem, u8 value) { | |
359 | char *p; | |
360 | u32 t; | |
361 | ||
362 | t = mem >> 16; | |
9dd7d179 | 363 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
364 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
365 | psxHu8(mem) = value; |
366 | else | |
367 | psxHwWrite8(mem, value); | |
368 | } else { | |
369 | p = (char *)(psxMemWLUT[t]); | |
7a8d521f | 370 | if (p != INVALID_PTR) { |
ef79bbde P |
371 | if (Config.Debug) |
372 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
373 | *(u8 *)(p + (mem & 0xffff)) = value; | |
41e82ad4 | 374 | #ifndef DRC_DISABLE |
ef79bbde P |
375 | psxCpu->Clear((mem & (~3)), 1); |
376 | #endif | |
377 | } else { | |
378 | #ifdef PSXMEM_LOG | |
379 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
380 | #endif | |
381 | } | |
382 | } | |
383 | } | |
384 | ||
385 | void psxMemWrite16(u32 mem, u16 value) { | |
386 | char *p; | |
387 | u32 t; | |
388 | ||
389 | t = mem >> 16; | |
9dd7d179 | 390 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
391 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
392 | psxHu16ref(mem) = SWAPu16(value); |
393 | else | |
394 | psxHwWrite16(mem, value); | |
395 | } else { | |
396 | p = (char *)(psxMemWLUT[t]); | |
7a8d521f | 397 | if (p != INVALID_PTR) { |
ef79bbde P |
398 | if (Config.Debug) |
399 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
400 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
41e82ad4 | 401 | #ifndef DRC_DISABLE |
3e31e934 | 402 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
403 | #endif |
404 | } else { | |
405 | #ifdef PSXMEM_LOG | |
406 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
407 | #endif | |
408 | } | |
409 | } | |
410 | } | |
411 | ||
412 | void psxMemWrite32(u32 mem, u32 value) { | |
413 | char *p; | |
414 | u32 t; | |
415 | ||
416 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
417 | t = mem >> 16; | |
9dd7d179 | 418 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
419 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
420 | psxHu32ref(mem) = SWAPu32(value); |
421 | else | |
422 | psxHwWrite32(mem, value); | |
423 | } else { | |
424 | p = (char *)(psxMemWLUT[t]); | |
7a8d521f | 425 | if (p != INVALID_PTR) { |
ef79bbde P |
426 | if (Config.Debug) |
427 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
428 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
41e82ad4 | 429 | #ifndef DRC_DISABLE |
ef79bbde P |
430 | psxCpu->Clear(mem, 1); |
431 | #endif | |
432 | } else { | |
679d5ee3 | 433 | if (mem == 0xfffe0130) { |
434 | psxRegs.biuReg = value; | |
435 | return; | |
436 | } | |
ef79bbde | 437 | #ifdef PSXMEM_LOG |
679d5ee3 | 438 | PSXMEM_LOG("err sw %8.8lx\n", mem); |
ef79bbde | 439 | #endif |
ef79bbde P |
440 | } |
441 | } | |
442 | } | |
443 | ||
444 | void *psxMemPointer(u32 mem) { | |
445 | char *p; | |
446 | u32 t; | |
447 | ||
448 | t = mem >> 16; | |
9dd7d179 | 449 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
450 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
451 | return (void *)&psxH[mem]; |
452 | else | |
453 | return NULL; | |
454 | } else { | |
455 | p = (char *)(psxMemWLUT[t]); | |
7a8d521f | 456 | if (p != INVALID_PTR) { |
ef79bbde P |
457 | return (void *)(p + (mem & 0xffff)); |
458 | } | |
459 | return NULL; | |
460 | } | |
461 | } |