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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 | |
33 | #include "memmap.h" | |
ef79bbde P |
34 | |
35 | #ifndef MAP_ANONYMOUS | |
36 | #define MAP_ANONYMOUS MAP_ANON | |
37 | #endif | |
38 | ||
87e5b45f | 39 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
40 | enum psxMapTag tag); | |
41 | void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag); | |
42 | ||
43 | void *psxMap(unsigned long addr, size_t size, int is_fixed, | |
44 | enum psxMapTag tag) | |
45 | { | |
46 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
5644b26c | 47 | int try_ = 0; |
b0dd9956 | 48 | unsigned long mask; |
87e5b45f | 49 | void *req, *ret; |
50 | ||
b0dd9956 | 51 | retry: |
52 | if (psxMapHook != NULL) { | |
85f23982 | 53 | ret = psxMapHook(addr, size, 0, tag); |
54 | if (ret == NULL) | |
55 | return NULL; | |
56 | } | |
57 | else { | |
58 | /* avoid MAP_FIXED, it overrides existing mappings.. */ | |
59 | /* if (is_fixed) | |
60 | flags |= MAP_FIXED; */ | |
61 | ||
62 | req = (void *)addr; | |
63 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
64 | if (ret == MAP_FAILED) | |
65 | return NULL; | |
b0dd9956 | 66 | } |
87e5b45f | 67 | |
b0dd9956 | 68 | if (addr != 0 && ret != (void *)addr) { |
69 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", | |
70 | addr, ret); | |
71 | ||
0069615f | 72 | if (is_fixed) { |
73 | psxUnmap(ret, size, tag); | |
74 | return NULL; | |
75 | } | |
76 | ||
5644b26c | 77 | if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2) |
b0dd9956 | 78 | { |
79 | psxUnmap(ret, size, tag); | |
80 | ||
81 | // try to use similarly aligned memory instead | |
82 | // (recompiler needs this) | |
5644b26c | 83 | mask = try_ ? 0xffff : 0xffffff; |
84 | addr = ((unsigned long)ret + mask) & ~mask; | |
85 | try_++; | |
b0dd9956 | 86 | goto retry; |
87 | } | |
88 | } | |
87e5b45f | 89 | |
90 | return ret; | |
91 | } | |
92 | ||
93 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
94 | { | |
95 | if (psxUnmapHook != NULL) { | |
96 | psxUnmapHook(ptr, size, tag); | |
97 | return; | |
98 | } | |
99 | ||
88901dd2 | 100 | if (ptr) |
101 | munmap(ptr, size); | |
87e5b45f | 102 | } |
103 | ||
ef79bbde P |
104 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) |
105 | s8 *psxP = NULL; // Parallel Port (64K) | |
106 | s8 *psxR = NULL; // BIOS ROM (512K) | |
107 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) | |
108 | ||
109 | u8 **psxMemWLUT = NULL; | |
110 | u8 **psxMemRLUT = NULL; | |
111 | ||
112 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) | |
113 | 0x0000_0000-0x0000_ffff Kernel (64K) | |
114 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) | |
115 | ||
116 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
117 | ||
118 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
119 | ||
120 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
121 | ||
122 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
123 | ||
124 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
125 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
126 | ||
127 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
128 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
129 | */ | |
130 | ||
131 | int psxMemInit() { | |
132 | int i; | |
133 | ||
134 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
135 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
136 | memset(psxMemRLUT, 0, 0x10000 * sizeof(void *)); | |
137 | memset(psxMemWLUT, 0, 0x10000 * sizeof(void *)); | |
138 | ||
87e5b45f | 139 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
a4874585 | 140 | if (psxM == NULL) |
f23d3386 | 141 | psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM); |
87e5b45f | 142 | if (psxM == NULL) { |
a327ad27 | 143 | SysMessage(_("mapping main RAM failed")); |
144 | return -1; | |
145 | } | |
ef79bbde P |
146 | |
147 | psxP = &psxM[0x200000]; | |
6d760c92 | 148 | psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER); |
87e5b45f | 149 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); |
ef79bbde P |
150 | |
151 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || | |
6d760c92 | 152 | psxR == NULL || psxP == NULL || psxH == NULL) { |
ef79bbde | 153 | SysMessage(_("Error allocating memory!")); |
88901dd2 | 154 | psxMemShutdown(); |
ef79bbde P |
155 | return -1; |
156 | } | |
157 | ||
158 | // MemR | |
159 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
160 | ||
161 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
162 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
163 | ||
164 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
165 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
166 | ||
167 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
168 | ||
169 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
170 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
171 | ||
172 | // MemW | |
173 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
174 | ||
175 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
176 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
177 | ||
fa18abb2 | 178 | // Don't allow writes to PIO Expansion region (psxP) to take effect. |
179 | // NOTE: Not sure if this is needed to fix any games but seems wise, | |
180 | // seeing as some games do read from PIO as part of copy-protection | |
181 | // check. (See fix in psxMemReset() regarding psxP region reads). | |
182 | psxMemWLUT[0x1f00] = NULL; | |
ef79bbde P |
183 | psxMemWLUT[0x1f80] = (u8 *)psxH; |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | void psxMemReset() { | |
189 | FILE *f = NULL; | |
190 | char bios[1024]; | |
191 | ||
192 | memset(psxM, 0, 0x00200000); | |
23643ee7 | 193 | memset(psxP, 0xff, 0x00010000); |
ef79bbde P |
194 | |
195 | if (strcmp(Config.Bios, "HLE") != 0) { | |
196 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
197 | f = fopen(bios, "rb"); | |
198 | ||
199 | if (f == NULL) { | |
200 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
201 | memset(psxR, 0, 0x80000); | |
202 | Config.HLE = TRUE; | |
203 | } else { | |
204 | fread(psxR, 1, 0x80000, f); | |
205 | fclose(f); | |
206 | Config.HLE = FALSE; | |
207 | } | |
208 | } else Config.HLE = TRUE; | |
209 | } | |
210 | ||
211 | void psxMemShutdown() { | |
88901dd2 | 212 | psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL; |
213 | psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL; | |
214 | psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL; | |
ef79bbde | 215 | |
88901dd2 | 216 | free(psxMemRLUT); psxMemRLUT = NULL; |
217 | free(psxMemWLUT); psxMemWLUT = NULL; | |
ef79bbde P |
218 | } |
219 | ||
220 | static int writeok = 1; | |
221 | ||
222 | u8 psxMemRead8(u32 mem) { | |
223 | char *p; | |
224 | u32 t; | |
225 | ||
226 | t = mem >> 16; | |
9dd7d179 | 227 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
228 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
229 | return psxHu8(mem); |
230 | else | |
231 | return psxHwRead8(mem); | |
232 | } else { | |
233 | p = (char *)(psxMemRLUT[t]); | |
234 | if (p != NULL) { | |
235 | if (Config.Debug) | |
236 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
237 | return *(u8 *)(p + (mem & 0xffff)); | |
238 | } else { | |
239 | #ifdef PSXMEM_LOG | |
240 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
241 | #endif | |
943a507a | 242 | return 0xFF; |
ef79bbde P |
243 | } |
244 | } | |
245 | } | |
246 | ||
247 | u16 psxMemRead16(u32 mem) { | |
248 | char *p; | |
249 | u32 t; | |
250 | ||
251 | t = mem >> 16; | |
9dd7d179 | 252 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
253 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
254 | return psxHu16(mem); |
255 | else | |
256 | return psxHwRead16(mem); | |
257 | } else { | |
258 | p = (char *)(psxMemRLUT[t]); | |
259 | if (p != NULL) { | |
260 | if (Config.Debug) | |
261 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
262 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
263 | } else { | |
264 | #ifdef PSXMEM_LOG | |
265 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
266 | #endif | |
943a507a | 267 | return 0xFFFF; |
ef79bbde P |
268 | } |
269 | } | |
270 | } | |
271 | ||
272 | u32 psxMemRead32(u32 mem) { | |
273 | char *p; | |
274 | u32 t; | |
275 | ||
276 | t = mem >> 16; | |
9dd7d179 | 277 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
278 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
279 | return psxHu32(mem); |
280 | else | |
281 | return psxHwRead32(mem); | |
282 | } else { | |
283 | p = (char *)(psxMemRLUT[t]); | |
284 | if (p != NULL) { | |
285 | if (Config.Debug) | |
286 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
287 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
288 | } else { | |
289 | #ifdef PSXMEM_LOG | |
290 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
291 | #endif | |
943a507a | 292 | return 0xFFFFFFFF; |
ef79bbde P |
293 | } |
294 | } | |
295 | } | |
296 | ||
297 | void psxMemWrite8(u32 mem, u8 value) { | |
298 | char *p; | |
299 | u32 t; | |
300 | ||
301 | t = mem >> 16; | |
9dd7d179 | 302 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
303 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
304 | psxHu8(mem) = value; |
305 | else | |
306 | psxHwWrite8(mem, value); | |
307 | } else { | |
308 | p = (char *)(psxMemWLUT[t]); | |
309 | if (p != NULL) { | |
310 | if (Config.Debug) | |
311 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
312 | *(u8 *)(p + (mem & 0xffff)) = value; | |
41e82ad4 | 313 | #ifndef DRC_DISABLE |
ef79bbde P |
314 | psxCpu->Clear((mem & (~3)), 1); |
315 | #endif | |
316 | } else { | |
317 | #ifdef PSXMEM_LOG | |
318 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
319 | #endif | |
320 | } | |
321 | } | |
322 | } | |
323 | ||
324 | void psxMemWrite16(u32 mem, u16 value) { | |
325 | char *p; | |
326 | u32 t; | |
327 | ||
328 | t = mem >> 16; | |
9dd7d179 | 329 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
330 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
331 | psxHu16ref(mem) = SWAPu16(value); |
332 | else | |
333 | psxHwWrite16(mem, value); | |
334 | } else { | |
335 | p = (char *)(psxMemWLUT[t]); | |
336 | if (p != NULL) { | |
337 | if (Config.Debug) | |
338 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
339 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
41e82ad4 | 340 | #ifndef DRC_DISABLE |
3e31e934 | 341 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
342 | #endif |
343 | } else { | |
344 | #ifdef PSXMEM_LOG | |
345 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
346 | #endif | |
347 | } | |
348 | } | |
349 | } | |
350 | ||
351 | void psxMemWrite32(u32 mem, u32 value) { | |
352 | char *p; | |
353 | u32 t; | |
354 | ||
355 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
356 | t = mem >> 16; | |
9dd7d179 | 357 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
358 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
359 | psxHu32ref(mem) = SWAPu32(value); |
360 | else | |
361 | psxHwWrite32(mem, value); | |
362 | } else { | |
363 | p = (char *)(psxMemWLUT[t]); | |
364 | if (p != NULL) { | |
365 | if (Config.Debug) | |
366 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
367 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
41e82ad4 | 368 | #ifndef DRC_DISABLE |
ef79bbde P |
369 | psxCpu->Clear(mem, 1); |
370 | #endif | |
371 | } else { | |
372 | if (mem != 0xfffe0130) { | |
41e82ad4 | 373 | #ifndef DRC_DISABLE |
ef79bbde P |
374 | if (!writeok) |
375 | psxCpu->Clear(mem, 1); | |
376 | #endif | |
377 | ||
378 | #ifdef PSXMEM_LOG | |
379 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
380 | #endif | |
381 | } else { | |
382 | int i; | |
383 | ||
384 | switch (value) { | |
385 | case 0x800: case 0x804: | |
386 | if (writeok == 0) break; | |
387 | writeok = 0; | |
388 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); | |
389 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); | |
390 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); | |
7bbabe80 | 391 | /* Required for icache interpreter otherwise Armored Core won't boot on icache interpreter */ |
392 | psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_ISOLATED, NULL); | |
ef79bbde P |
393 | break; |
394 | case 0x00: case 0x1e988: | |
395 | if (writeok == 1) break; | |
396 | writeok = 1; | |
397 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
398 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
399 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
7bbabe80 | 400 | /* Dynarecs might take this opportunity to flush their code cache */ |
401 | psxCpu->Notify(R3000ACPU_NOTIFY_CACHE_UNISOLATED, NULL); | |
ef79bbde P |
402 | break; |
403 | default: | |
404 | #ifdef PSXMEM_LOG | |
405 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
406 | #endif | |
407 | break; | |
408 | } | |
409 | } | |
410 | } | |
411 | } | |
412 | } | |
413 | ||
414 | void *psxMemPointer(u32 mem) { | |
415 | char *p; | |
416 | u32 t; | |
417 | ||
418 | t = mem >> 16; | |
9dd7d179 | 419 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
420 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
421 | return (void *)&psxH[mem]; |
422 | else | |
423 | return NULL; | |
424 | } else { | |
425 | p = (char *)(psxMemWLUT[t]); | |
426 | if (p != NULL) { | |
427 | return (void *)(p + (mem & 0xffff)); | |
428 | } | |
429 | return NULL; | |
430 | } | |
431 | } |