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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" | |
fc8145b7 | 30 | #include "debug.h" |
ce0e7ac9 | 31 | |
32 | #include "memmap.h" | |
ef79bbde P |
33 | |
34 | #ifndef MAP_ANONYMOUS | |
35 | #define MAP_ANONYMOUS MAP_ANON | |
36 | #endif | |
37 | ||
87e5b45f | 38 | void *(*psxMapHook)(unsigned long addr, size_t size, int is_fixed, |
39 | enum psxMapTag tag); | |
40 | void (*psxUnmapHook)(void *ptr, size_t size, enum psxMapTag tag); | |
41 | ||
42 | void *psxMap(unsigned long addr, size_t size, int is_fixed, | |
43 | enum psxMapTag tag) | |
44 | { | |
45 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; | |
5644b26c | 46 | int try_ = 0; |
b0dd9956 | 47 | unsigned long mask; |
87e5b45f | 48 | void *req, *ret; |
49 | ||
b0dd9956 | 50 | retry: |
51 | if (psxMapHook != NULL) { | |
85f23982 | 52 | ret = psxMapHook(addr, size, 0, tag); |
53 | if (ret == NULL) | |
54 | return NULL; | |
55 | } | |
56 | else { | |
57 | /* avoid MAP_FIXED, it overrides existing mappings.. */ | |
58 | /* if (is_fixed) | |
59 | flags |= MAP_FIXED; */ | |
60 | ||
61 | req = (void *)addr; | |
62 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); | |
63 | if (ret == MAP_FAILED) | |
64 | return NULL; | |
b0dd9956 | 65 | } |
87e5b45f | 66 | |
b0dd9956 | 67 | if (addr != 0 && ret != (void *)addr) { |
68 | SysMessage("psxMap: warning: wanted to map @%08x, got %p\n", | |
69 | addr, ret); | |
70 | ||
0069615f | 71 | if (is_fixed) { |
72 | psxUnmap(ret, size, tag); | |
73 | return NULL; | |
74 | } | |
75 | ||
5644b26c | 76 | if (((addr ^ (unsigned long)ret) & ~0xff000000l) && try_ < 2) |
b0dd9956 | 77 | { |
78 | psxUnmap(ret, size, tag); | |
79 | ||
80 | // try to use similarly aligned memory instead | |
81 | // (recompiler needs this) | |
5644b26c | 82 | mask = try_ ? 0xffff : 0xffffff; |
83 | addr = ((unsigned long)ret + mask) & ~mask; | |
84 | try_++; | |
b0dd9956 | 85 | goto retry; |
86 | } | |
87 | } | |
87e5b45f | 88 | |
89 | return ret; | |
90 | } | |
91 | ||
92 | void psxUnmap(void *ptr, size_t size, enum psxMapTag tag) | |
93 | { | |
94 | if (psxUnmapHook != NULL) { | |
95 | psxUnmapHook(ptr, size, tag); | |
96 | return; | |
97 | } | |
98 | ||
88901dd2 | 99 | if (ptr) |
100 | munmap(ptr, size); | |
87e5b45f | 101 | } |
102 | ||
ef79bbde P |
103 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) |
104 | s8 *psxP = NULL; // Parallel Port (64K) | |
105 | s8 *psxR = NULL; // BIOS ROM (512K) | |
106 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) | |
107 | ||
108 | u8 **psxMemWLUT = NULL; | |
109 | u8 **psxMemRLUT = NULL; | |
110 | ||
111 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) | |
112 | 0x0000_0000-0x0000_ffff Kernel (64K) | |
113 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) | |
114 | ||
115 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
116 | ||
117 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
118 | ||
119 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
120 | ||
121 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
122 | ||
123 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
124 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
125 | ||
126 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
127 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
128 | */ | |
129 | ||
130 | int psxMemInit() { | |
131 | int i; | |
132 | ||
133 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
134 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
135 | memset(psxMemRLUT, 0, 0x10000 * sizeof(void *)); | |
136 | memset(psxMemWLUT, 0, 0x10000 * sizeof(void *)); | |
137 | ||
87e5b45f | 138 | psxM = psxMap(0x80000000, 0x00210000, 1, MAP_TAG_RAM); |
a327ad27 | 139 | #ifndef RAM_FIXED |
a4874585 | 140 | if (psxM == NULL) |
f23d3386 | 141 | psxM = psxMap(0x77000000, 0x00210000, 0, MAP_TAG_RAM); |
a327ad27 | 142 | #endif |
87e5b45f | 143 | if (psxM == NULL) { |
a327ad27 | 144 | SysMessage(_("mapping main RAM failed")); |
145 | return -1; | |
146 | } | |
ef79bbde P |
147 | |
148 | psxP = &psxM[0x200000]; | |
6d760c92 | 149 | psxH = psxMap(0x1f800000, 0x10000, 0, MAP_TAG_OTHER); |
87e5b45f | 150 | psxR = psxMap(0x1fc00000, 0x80000, 0, MAP_TAG_OTHER); |
ef79bbde P |
151 | |
152 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || | |
6d760c92 | 153 | psxR == NULL || psxP == NULL || psxH == NULL) { |
ef79bbde | 154 | SysMessage(_("Error allocating memory!")); |
88901dd2 | 155 | psxMemShutdown(); |
ef79bbde P |
156 | return -1; |
157 | } | |
158 | ||
159 | // MemR | |
160 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
161 | ||
162 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
163 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
164 | ||
165 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
166 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
167 | ||
168 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
169 | ||
170 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
171 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
172 | ||
173 | // MemW | |
174 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
175 | ||
176 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
177 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
178 | ||
fa18abb2 | 179 | // Don't allow writes to PIO Expansion region (psxP) to take effect. |
180 | // NOTE: Not sure if this is needed to fix any games but seems wise, | |
181 | // seeing as some games do read from PIO as part of copy-protection | |
182 | // check. (See fix in psxMemReset() regarding psxP region reads). | |
183 | psxMemWLUT[0x1f00] = NULL; | |
ef79bbde P |
184 | psxMemWLUT[0x1f80] = (u8 *)psxH; |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
189 | void psxMemReset() { | |
190 | FILE *f = NULL; | |
191 | char bios[1024]; | |
192 | ||
193 | memset(psxM, 0, 0x00200000); | |
23643ee7 | 194 | memset(psxP, 0xff, 0x00010000); |
ef79bbde P |
195 | |
196 | if (strcmp(Config.Bios, "HLE") != 0) { | |
197 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
198 | f = fopen(bios, "rb"); | |
199 | ||
200 | if (f == NULL) { | |
201 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
202 | memset(psxR, 0, 0x80000); | |
203 | Config.HLE = TRUE; | |
204 | } else { | |
205 | fread(psxR, 1, 0x80000, f); | |
206 | fclose(f); | |
207 | Config.HLE = FALSE; | |
208 | } | |
209 | } else Config.HLE = TRUE; | |
210 | } | |
211 | ||
212 | void psxMemShutdown() { | |
88901dd2 | 213 | psxUnmap(psxM, 0x00210000, MAP_TAG_RAM); psxM = NULL; |
214 | psxUnmap(psxH, 0x10000, MAP_TAG_OTHER); psxH = NULL; | |
215 | psxUnmap(psxR, 0x80000, MAP_TAG_OTHER); psxR = NULL; | |
ef79bbde | 216 | |
88901dd2 | 217 | free(psxMemRLUT); psxMemRLUT = NULL; |
218 | free(psxMemWLUT); psxMemWLUT = NULL; | |
ef79bbde P |
219 | } |
220 | ||
221 | static int writeok = 1; | |
222 | ||
223 | u8 psxMemRead8(u32 mem) { | |
224 | char *p; | |
225 | u32 t; | |
226 | ||
227 | t = mem >> 16; | |
9dd7d179 | 228 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
229 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
230 | return psxHu8(mem); |
231 | else | |
232 | return psxHwRead8(mem); | |
233 | } else { | |
234 | p = (char *)(psxMemRLUT[t]); | |
235 | if (p != NULL) { | |
236 | if (Config.Debug) | |
237 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
238 | return *(u8 *)(p + (mem & 0xffff)); | |
239 | } else { | |
240 | #ifdef PSXMEM_LOG | |
241 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
242 | #endif | |
943a507a | 243 | return 0xFF; |
ef79bbde P |
244 | } |
245 | } | |
246 | } | |
247 | ||
248 | u16 psxMemRead16(u32 mem) { | |
249 | char *p; | |
250 | u32 t; | |
251 | ||
252 | t = mem >> 16; | |
9dd7d179 | 253 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
254 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
255 | return psxHu16(mem); |
256 | else | |
257 | return psxHwRead16(mem); | |
258 | } else { | |
259 | p = (char *)(psxMemRLUT[t]); | |
260 | if (p != NULL) { | |
261 | if (Config.Debug) | |
262 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
263 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
264 | } else { | |
265 | #ifdef PSXMEM_LOG | |
266 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
267 | #endif | |
943a507a | 268 | return 0xFFFF; |
ef79bbde P |
269 | } |
270 | } | |
271 | } | |
272 | ||
273 | u32 psxMemRead32(u32 mem) { | |
274 | char *p; | |
275 | u32 t; | |
276 | ||
277 | t = mem >> 16; | |
9dd7d179 | 278 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
279 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
280 | return psxHu32(mem); |
281 | else | |
282 | return psxHwRead32(mem); | |
283 | } else { | |
284 | p = (char *)(psxMemRLUT[t]); | |
285 | if (p != NULL) { | |
286 | if (Config.Debug) | |
287 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
288 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
289 | } else { | |
290 | #ifdef PSXMEM_LOG | |
291 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
292 | #endif | |
943a507a | 293 | return 0xFFFFFFFF; |
ef79bbde P |
294 | } |
295 | } | |
296 | } | |
297 | ||
298 | void psxMemWrite8(u32 mem, u8 value) { | |
299 | char *p; | |
300 | u32 t; | |
301 | ||
302 | t = mem >> 16; | |
9dd7d179 | 303 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
304 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
305 | psxHu8(mem) = value; |
306 | else | |
307 | psxHwWrite8(mem, value); | |
308 | } else { | |
309 | p = (char *)(psxMemWLUT[t]); | |
310 | if (p != NULL) { | |
311 | if (Config.Debug) | |
312 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
313 | *(u8 *)(p + (mem & 0xffff)) = value; | |
41e82ad4 | 314 | #ifndef DRC_DISABLE |
ef79bbde P |
315 | psxCpu->Clear((mem & (~3)), 1); |
316 | #endif | |
317 | } else { | |
318 | #ifdef PSXMEM_LOG | |
319 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
320 | #endif | |
321 | } | |
322 | } | |
323 | } | |
324 | ||
325 | void psxMemWrite16(u32 mem, u16 value) { | |
326 | char *p; | |
327 | u32 t; | |
328 | ||
329 | t = mem >> 16; | |
9dd7d179 | 330 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
331 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
332 | psxHu16ref(mem) = SWAPu16(value); |
333 | else | |
334 | psxHwWrite16(mem, value); | |
335 | } else { | |
336 | p = (char *)(psxMemWLUT[t]); | |
337 | if (p != NULL) { | |
338 | if (Config.Debug) | |
339 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
340 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
41e82ad4 | 341 | #ifndef DRC_DISABLE |
3e31e934 | 342 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
343 | #endif |
344 | } else { | |
345 | #ifdef PSXMEM_LOG | |
346 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
347 | #endif | |
348 | } | |
349 | } | |
350 | } | |
351 | ||
352 | void psxMemWrite32(u32 mem, u32 value) { | |
353 | char *p; | |
354 | u32 t; | |
355 | ||
356 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
357 | t = mem >> 16; | |
9dd7d179 | 358 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
359 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
360 | psxHu32ref(mem) = SWAPu32(value); |
361 | else | |
362 | psxHwWrite32(mem, value); | |
363 | } else { | |
364 | p = (char *)(psxMemWLUT[t]); | |
365 | if (p != NULL) { | |
366 | if (Config.Debug) | |
367 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
368 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
41e82ad4 | 369 | #ifndef DRC_DISABLE |
ef79bbde P |
370 | psxCpu->Clear(mem, 1); |
371 | #endif | |
372 | } else { | |
373 | if (mem != 0xfffe0130) { | |
41e82ad4 | 374 | #ifndef DRC_DISABLE |
ef79bbde P |
375 | if (!writeok) |
376 | psxCpu->Clear(mem, 1); | |
377 | #endif | |
378 | ||
379 | #ifdef PSXMEM_LOG | |
380 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
381 | #endif | |
382 | } else { | |
383 | int i; | |
384 | ||
385 | switch (value) { | |
386 | case 0x800: case 0x804: | |
387 | if (writeok == 0) break; | |
388 | writeok = 0; | |
389 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); | |
390 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); | |
391 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); | |
392 | break; | |
393 | case 0x00: case 0x1e988: | |
394 | if (writeok == 1) break; | |
395 | writeok = 1; | |
396 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
397 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
398 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
399 | break; | |
400 | default: | |
401 | #ifdef PSXMEM_LOG | |
402 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
403 | #endif | |
404 | break; | |
405 | } | |
406 | } | |
407 | } | |
408 | } | |
409 | } | |
410 | ||
411 | void *psxMemPointer(u32 mem) { | |
412 | char *p; | |
413 | u32 t; | |
414 | ||
415 | t = mem >> 16; | |
9dd7d179 | 416 | if (t == 0x1f80 || t == 0x9f80 || t == 0xbf80) { |
417 | if ((mem & 0xffff) < 0x400) | |
ef79bbde P |
418 | return (void *)&psxH[mem]; |
419 | else | |
420 | return NULL; | |
421 | } else { | |
422 | p = (char *)(psxMemWLUT[t]); | |
423 | if (p != NULL) { | |
424 | return (void *)(p + (mem & 0xffff)); | |
425 | } | |
426 | return NULL; | |
427 | } | |
428 | } |