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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" | |
5b568098 | 30 | //#include "debug.h" |
31 | #define DebugCheckBP(...) | |
ce0e7ac9 | 32 | |
479d58cf | 33 | #include "lightrec/mem.h" |
ce0e7ac9 | 34 | #include "memmap.h" |
ef79bbde | 35 | |
226a5691 | 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 | ||
87e5b45f | 44 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
45 | enum psxMapTag tag); | |
46 | void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag); | |
47 | ||
48 | void *psxMap(unsigned long addr, size_t size, int is_fixed, | |
49 | enum psxMapTag tag) | |
50 | { | |
a62012a7 | 51 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
5644b26c | 52 | int try_ = 0; |
b0dd9956 | 53 | unsigned long mask; |
87e5b45f | 54 | void *req, *ret; |
55 | ||
b0dd9956 | 56 | retry: |
57 | if (psxMapHook != NULL) { | |
85f23982 | 58 | ret = psxMapHook(addr, size, 0, tag); |
59 | if (ret == NULL) | |
b012a437 | 60 | return MAP_FAILED; |
85f23982 | 61 | } |
62 | else { | |
63 | /* avoid MAP_FIXED, it overrides existing mappings.. */ | |
64 | /* if (is_fixed) | |
65 | flags |= MAP_FIXED; */ | |
66 | ||
2d724e28 | 67 | req = (void *)(uintptr_t)addr; |
85f23982 | 68 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); |
69 | if (ret == MAP_FAILED) | |
b012a437 | 70 | return ret; |
b0dd9956 | 71 | } |
87e5b45f | 72 | |
2d724e28 | 73 | if (addr != 0 && ret != (void *)(uintptr_t)addr) { |
b0dd9956 | 74 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", |
75 | addr, ret); | |
76 | ||
0069615f | 77 | if (is_fixed) { |
78 | psxUnmap(ret, size, tag); | |
b012a437 | 79 | return MAP_FAILED; |
0069615f | 80 | } |
81 | ||
2d724e28 | 82 | if (((addr ^ (unsigned long)(uintptr_t)ret) & ~0xff000000l) && try_ < 2) |
b0dd9956 | 83 | { |
84 | psxUnmap(ret, size, tag); | |
85 | ||
86 | // try to use similarly aligned memory instead | |
87 | // (recompiler needs this) | |
5644b26c | 88 | mask = try_ ? 0xffff : 0xffffff; |
2d724e28 | 89 | addr = ((uintptr_t)ret + mask) & ~mask; |
5644b26c | 90 | try_++; |
b0dd9956 | 91 | goto retry; |
92 | } | |
93 | } | |
87e5b45f | 94 | |
95 | return ret; | |
96 | } | |
97 | ||
98 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
99 | { | |
100 | if (psxUnmapHook != NULL) { | |
101 | psxUnmapHook(ptr, size, tag); | |
102 | return; | |
103 | } | |
104 | ||
88901dd2 | 105 | if (ptr) |
106 | munmap(ptr, size); | |
87e5b45f | 107 | } |
108 | ||
ef79bbde P |
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) | |
113 | ||
114 | u8 **psxMemWLUT = NULL; | |
115 | u8 **psxMemRLUT = NULL; | |
116 | ||
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) | |
120 | ||
121 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
122 | ||
123 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
124 | ||
125 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
126 | ||
127 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
128 | ||
129 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
130 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
131 | ||
132 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
133 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
134 | */ | |
135 | ||
479d58cf PC |
136 | static int psxMemInitMap(void) |
137 | { | |
a62012a7 | 138 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
b012a437 | 139 | if (psxM == MAP_FAILED) |
f23d3386 | 140 | psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM); |
b012a437 | 141 | if (psxM == MAP_FAILED) { |
a327ad27 | 142 | SysMessage(_("mapping main RAM failed")); |
5b568098 | 143 | psxM = NULL; |
a327ad27 | 144 | return -1; |
145 | } | |
ef79bbde | 146 | psxP = &psxM[0x200000]; |
5b568098 | 147 | |
a62012a7 | 148 | psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER); |
5b568098 | 149 | if (psxH == MAP_FAILED) { |
150 | SysMessage(_("Error allocating memory!")); | |
151 | psxMemShutdown(); | |
152 | return -1; | |
153 | } | |
ef79bbde | 154 | |
5b568098 | 155 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); |
156 | if (psxR == MAP_FAILED) { | |
ef79bbde | 157 | SysMessage(_("Error allocating memory!")); |
88901dd2 | 158 | psxMemShutdown(); |
ef79bbde P |
159 | return -1; |
160 | } | |
161 | ||
479d58cf PC |
162 | return 0; |
163 | } | |
164 | ||
165 | static void psxMemFreeMap(void) | |
166 | { | |
5b568098 | 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; | |
171 | psxP = NULL; | |
479d58cf PC |
172 | } |
173 | ||
174 | int psxMemInit(void) | |
175 | { | |
176 | unsigned int i; | |
177 | int ret; | |
178 | ||
640c8536 | 179 | if (LIGHTREC_CUSTOM_MAP) |
479d58cf PC |
180 | ret = lightrec_init_mmap(); |
181 | else | |
182 | ret = psxMemInitMap(); | |
183 | if (ret) { | |
184 | SysMessage(_("Error allocating memory!")); | |
185 | psxMemShutdown(); | |
186 | return -1; | |
187 | } | |
188 | ||
b012a437 PC |
189 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); |
190 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
191 | ||
192 | if (psxMemRLUT == NULL || psxMemWLUT == NULL) { | |
193 | SysMessage(_("Error allocating memory!")); | |
194 | psxMemShutdown(); | |
195 | return -1; | |
196 | } | |
197 | ||
c6b7420b | 198 | memset(psxMemRLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *)); |
199 | memset(psxMemWLUT, (int)(uintptr_t)INVALID_PTR, 0x10000 * sizeof(void *)); | |
b012a437 | 200 | |
ef79bbde P |
201 | // MemR |
202 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
203 | ||
204 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
205 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
206 | ||
207 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
208 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
209 | ||
210 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
211 | ||
212 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
213 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
214 | ||
215 | // MemW | |
216 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
217 | ||
218 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
219 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
220 | ||
6e4e5efb | 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). | |
b012a437 | 225 | psxMemWLUT[0x1f00] = INVALID_PTR; |
ef79bbde P |
226 | psxMemWLUT[0x1f80] = (u8 *)psxH; |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | void psxMemReset() { | |
232 | FILE *f = NULL; | |
233 | char bios[1024]; | |
234 | ||
235 | memset(psxM, 0, 0x00200000); | |
23643ee7 | 236 | memset(psxP, 0xff, 0x00010000); |
ef79bbde | 237 | |
9361a5aa EC |
238 | Config.HLE = TRUE; |
239 | ||
ef79bbde P |
240 | if (strcmp(Config.Bios, "HLE") != 0) { |
241 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
226a5691 | 242 | f = fopen(bios, "rb"); |
ef79bbde P |
243 | |
244 | if (f == NULL) { | |
245 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
246 | memset(psxR, 0, 0x80000); | |
ef79bbde | 247 | } else { |
9361a5aa EC |
248 | if (fread(psxR, 1, 0x80000, f) == 0x80000) { |
249 | Config.HLE = FALSE; | |
250 | } else { | |
251 | SysMessage(_("The selected BIOS:\"%s\" is of wrong size. Enabling HLE Bios!\n"), bios); | |
252 | } | |
ef79bbde | 253 | fclose(f); |
ef79bbde | 254 | } |
9361a5aa | 255 | } |
ef79bbde P |
256 | } |
257 | ||
258 | void psxMemShutdown() { | |
640c8536 | 259 | if (LIGHTREC_CUSTOM_MAP) |
479d58cf PC |
260 | lightrec_free_mmap(); |
261 | else | |
262 | psxMemFreeMap(); | |
ef79bbde | 263 | |
88901dd2 | 264 | free(psxMemRLUT); psxMemRLUT = NULL; |
265 | free(psxMemWLUT); psxMemWLUT = NULL; | |
ef79bbde P |
266 | } |
267 | ||
c6b7420b | 268 | void psxMemOnIsolate(int enable) |
269 | { | |
270 | if (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 *)); | |
274 | } else { | |
275 | int i; | |
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 *)); | |
280 | } | |
281 | psxCpu->Notify(enable ? R3000ACPU_NOTIFY_CACHE_ISOLATED | |
282 | : R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL); | |
283 | } | |
5b568098 | 284 | |
ef79bbde P |
285 | u8 psxMemRead8(u32 mem) { |
286 | char *p; | |
287 | u32 t; | |
288 | ||
289 | t = mem >> 16; | |
9dd7d179 | 290 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
291 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
292 | return psxHu8(mem); |
293 | else | |
294 | return psxHwRead8(mem); | |
295 | } else { | |
296 | p = (char *)(psxMemRLUT[t]); | |
b012a437 | 297 | if (p != INVALID_PTR) { |
ef79bbde P |
298 | if (Config.Debug) |
299 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
300 | return *(u8 *)(p + (mem & 0xffff)); | |
301 | } else { | |
302 | #ifdef PSXMEM_LOG | |
303 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
304 | #endif | |
e86be808 | 305 | return 0xFF; |
ef79bbde P |
306 | } |
307 | } | |
308 | } | |
309 | ||
310 | u16 psxMemRead16(u32 mem) { | |
311 | char *p; | |
312 | u32 t; | |
313 | ||
314 | t = mem >> 16; | |
9dd7d179 | 315 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
316 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
317 | return psxHu16(mem); |
318 | else | |
319 | return psxHwRead16(mem); | |
320 | } else { | |
321 | p = (char *)(psxMemRLUT[t]); | |
b012a437 | 322 | if (p != INVALID_PTR) { |
ef79bbde P |
323 | if (Config.Debug) |
324 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
325 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
326 | } else { | |
327 | #ifdef PSXMEM_LOG | |
328 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
329 | #endif | |
e86be808 | 330 | return 0xFFFF; |
ef79bbde P |
331 | } |
332 | } | |
333 | } | |
334 | ||
335 | u32 psxMemRead32(u32 mem) { | |
336 | char *p; | |
337 | u32 t; | |
338 | ||
339 | t = mem >> 16; | |
9dd7d179 | 340 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
341 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
342 | return psxHu32(mem); |
343 | else | |
344 | return psxHwRead32(mem); | |
345 | } else { | |
346 | p = (char *)(psxMemRLUT[t]); | |
b012a437 | 347 | if (p != INVALID_PTR) { |
ef79bbde P |
348 | if (Config.Debug) |
349 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
350 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
351 | } else { | |
c6b7420b | 352 | if (mem == 0xfffe0130) |
353 | return psxRegs.biuReg; | |
ef79bbde | 354 | #ifdef PSXMEM_LOG |
c6b7420b | 355 | PSXMEM_LOG("err lw %8.8lx\n", mem); |
ef79bbde | 356 | #endif |
e86be808 | 357 | return 0xFFFFFFFF; |
ef79bbde P |
358 | } |
359 | } | |
360 | } | |
361 | ||
362 | void psxMemWrite8(u32 mem, u8 value) { | |
363 | char *p; | |
364 | u32 t; | |
365 | ||
366 | t = mem >> 16; | |
9dd7d179 | 367 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
368 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
369 | psxHu8(mem) = value; |
370 | else | |
371 | psxHwWrite8(mem, value); | |
372 | } else { | |
373 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 374 | if (p != INVALID_PTR) { |
ef79bbde P |
375 | if (Config.Debug) |
376 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
377 | *(u8 *)(p + (mem & 0xffff)) = value; | |
630b122b | 378 | #ifndef DRC_DISABLE |
ef79bbde P |
379 | psxCpu->Clear((mem & (~3)), 1); |
380 | #endif | |
381 | } else { | |
382 | #ifdef PSXMEM_LOG | |
383 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
384 | #endif | |
385 | } | |
386 | } | |
387 | } | |
388 | ||
389 | void psxMemWrite16(u32 mem, u16 value) { | |
390 | char *p; | |
391 | u32 t; | |
392 | ||
393 | t = mem >> 16; | |
9dd7d179 | 394 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
395 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
396 | psxHu16ref(mem) = SWAPu16(value); |
397 | else | |
398 | psxHwWrite16(mem, value); | |
399 | } else { | |
400 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 401 | if (p != INVALID_PTR) { |
ef79bbde P |
402 | if (Config.Debug) |
403 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
404 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
630b122b | 405 | #ifndef DRC_DISABLE |
3e31e934 | 406 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
407 | #endif |
408 | } else { | |
409 | #ifdef PSXMEM_LOG | |
410 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
411 | #endif | |
412 | } | |
413 | } | |
414 | } | |
415 | ||
416 | void psxMemWrite32(u32 mem, u32 value) { | |
417 | char *p; | |
418 | u32 t; | |
630b122b | 419 | |
ef79bbde P |
420 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); |
421 | t = mem >> 16; | |
9dd7d179 | 422 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
630b122b | 423 | if ((mem & 0xffff) < 0x400) |
ef79bbde P |
424 | psxHu32ref(mem) = SWAPu32(value); |
425 | else | |
426 | psxHwWrite32(mem, value); | |
427 | } else { | |
428 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 429 | if (p != INVALID_PTR) { |
ef79bbde P |
430 | if (Config.Debug) |
431 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
432 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
630b122b | 433 | #ifndef DRC_DISABLE |
ef79bbde P |
434 | psxCpu->Clear(mem, 1); |
435 | #endif | |
436 | } else { | |
c6b7420b | 437 | if (mem == 0xfffe0130) { |
438 | psxRegs.biuReg = value; | |
439 | return; | |
440 | } | |
ef79bbde | 441 | #ifdef PSXMEM_LOG |
c6b7420b | 442 | PSXMEM_LOG("err sw %8.8lx\n", mem); |
ef79bbde | 443 | #endif |
ef79bbde P |
444 | } |
445 | } | |
446 | } | |
447 | ||
448 | void *psxMemPointer(u32 mem) { | |
449 | char *p; | |
450 | u32 t; | |
451 | ||
452 | t = mem >> 16; | |
9dd7d179 | 453 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
454 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
455 | return (void *)&psxH[mem]; |
456 | else | |
457 | return NULL; | |
458 | } else { | |
459 | p = (char *)(psxMemWLUT[t]); | |
b012a437 | 460 | if (p != INVALID_PTR) { |
ef79bbde P |
461 | return (void *)(p + (mem & 0xffff)); |
462 | } | |
463 | return NULL; | |
464 | } | |
465 | } |