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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" | |
27 | #include "r3000a.h" | |
28 | #include "psxhw.h" | |
fc8145b7 | 29 | #include "debug.h" |
ef79bbde P |
30 | #include <sys/mman.h> |
31 | ||
32 | #ifndef MAP_ANONYMOUS | |
33 | #define MAP_ANONYMOUS MAP_ANON | |
34 | #endif | |
35 | ||
36 | s8 *psxM = NULL; // Kernel & User Memory (2 Meg) | |
37 | s8 *psxP = NULL; // Parallel Port (64K) | |
38 | s8 *psxR = NULL; // BIOS ROM (512K) | |
39 | s8 *psxH = NULL; // Scratch Pad (1K) & Hardware Registers (8K) | |
40 | ||
41 | u8 **psxMemWLUT = NULL; | |
42 | u8 **psxMemRLUT = NULL; | |
43 | ||
44 | /* Playstation Memory Map (from Playstation doc by Joshua Walker) | |
45 | 0x0000_0000-0x0000_ffff Kernel (64K) | |
46 | 0x0001_0000-0x001f_ffff User Memory (1.9 Meg) | |
47 | ||
48 | 0x1f00_0000-0x1f00_ffff Parallel Port (64K) | |
49 | ||
50 | 0x1f80_0000-0x1f80_03ff Scratch Pad (1024 bytes) | |
51 | ||
52 | 0x1f80_1000-0x1f80_2fff Hardware Registers (8K) | |
53 | ||
54 | 0x1fc0_0000-0x1fc7_ffff BIOS (512K) | |
55 | ||
56 | 0x8000_0000-0x801f_ffff Kernel and User Memory Mirror (2 Meg) Cached | |
57 | 0x9fc0_0000-0x9fc7_ffff BIOS Mirror (512K) Cached | |
58 | ||
59 | 0xa000_0000-0xa01f_ffff Kernel and User Memory Mirror (2 Meg) Uncached | |
60 | 0xbfc0_0000-0xbfc7_ffff BIOS Mirror (512K) Uncached | |
61 | */ | |
62 | ||
63 | int psxMemInit() { | |
64 | int i; | |
65 | ||
66 | psxMemRLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
67 | psxMemWLUT = (u8 **)malloc(0x10000 * sizeof(void *)); | |
68 | memset(psxMemRLUT, 0, 0x10000 * sizeof(void *)); | |
69 | memset(psxMemWLUT, 0, 0x10000 * sizeof(void *)); | |
70 | ||
f95a77f7 | 71 | psxM = mmap((void *)0x80000000, 0x00220000, |
ef79bbde P |
72 | PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
73 | ||
74 | psxP = &psxM[0x200000]; | |
75 | psxH = &psxM[0x210000]; | |
76 | ||
a06c1d6e | 77 | psxR = mmap((void *)0x9fc00000, 0x80000, |
78 | PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
ef79bbde P |
79 | |
80 | if (psxMemRLUT == NULL || psxMemWLUT == NULL || | |
a06c1d6e | 81 | psxM != (void *)0x80000000 || psxR != (void *)0x9fc00000 || |
82 | psxP == NULL || psxH == NULL) { | |
ef79bbde P |
83 | SysMessage(_("Error allocating memory!")); |
84 | return -1; | |
85 | } | |
86 | ||
87 | // MemR | |
88 | for (i = 0; i < 0x80; i++) psxMemRLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
89 | ||
90 | memcpy(psxMemRLUT + 0x8000, psxMemRLUT, 0x80 * sizeof(void *)); | |
91 | memcpy(psxMemRLUT + 0xa000, psxMemRLUT, 0x80 * sizeof(void *)); | |
92 | ||
93 | psxMemRLUT[0x1f00] = (u8 *)psxP; | |
94 | psxMemRLUT[0x1f80] = (u8 *)psxH; | |
95 | ||
96 | for (i = 0; i < 0x08; i++) psxMemRLUT[i + 0x1fc0] = (u8 *)&psxR[i << 16]; | |
97 | ||
98 | memcpy(psxMemRLUT + 0x9fc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
99 | memcpy(psxMemRLUT + 0xbfc0, psxMemRLUT + 0x1fc0, 0x08 * sizeof(void *)); | |
100 | ||
101 | // MemW | |
102 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (u8 *)&psxM[(i & 0x1f) << 16]; | |
103 | ||
104 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
105 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
106 | ||
107 | psxMemWLUT[0x1f00] = (u8 *)psxP; | |
108 | psxMemWLUT[0x1f80] = (u8 *)psxH; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | void psxMemReset() { | |
114 | FILE *f = NULL; | |
115 | char bios[1024]; | |
116 | ||
117 | memset(psxM, 0, 0x00200000); | |
118 | memset(psxP, 0, 0x00010000); | |
119 | ||
120 | if (strcmp(Config.Bios, "HLE") != 0) { | |
121 | sprintf(bios, "%s/%s", Config.BiosDir, Config.Bios); | |
122 | f = fopen(bios, "rb"); | |
123 | ||
124 | if (f == NULL) { | |
125 | SysMessage(_("Could not open BIOS:\"%s\". Enabling HLE Bios!\n"), bios); | |
126 | memset(psxR, 0, 0x80000); | |
127 | Config.HLE = TRUE; | |
128 | } else { | |
129 | fread(psxR, 1, 0x80000, f); | |
130 | fclose(f); | |
131 | Config.HLE = FALSE; | |
132 | } | |
133 | } else Config.HLE = TRUE; | |
134 | } | |
135 | ||
136 | void psxMemShutdown() { | |
137 | munmap(psxM, 0x00220000); | |
a06c1d6e | 138 | munmap(psxR, 0x80000); |
ef79bbde | 139 | |
ef79bbde P |
140 | free(psxMemRLUT); |
141 | free(psxMemWLUT); | |
142 | } | |
143 | ||
144 | static int writeok = 1; | |
145 | ||
146 | u8 psxMemRead8(u32 mem) { | |
147 | char *p; | |
148 | u32 t; | |
149 | ||
150 | t = mem >> 16; | |
151 | if (t == 0x1f80) { | |
152 | if (mem < 0x1f801000) | |
153 | return psxHu8(mem); | |
154 | else | |
155 | return psxHwRead8(mem); | |
156 | } else { | |
157 | p = (char *)(psxMemRLUT[t]); | |
158 | if (p != NULL) { | |
159 | if (Config.Debug) | |
160 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R1); | |
161 | return *(u8 *)(p + (mem & 0xffff)); | |
162 | } else { | |
163 | #ifdef PSXMEM_LOG | |
164 | PSXMEM_LOG("err lb %8.8lx\n", mem); | |
165 | #endif | |
166 | return 0; | |
167 | } | |
168 | } | |
169 | } | |
170 | ||
171 | u16 psxMemRead16(u32 mem) { | |
172 | char *p; | |
173 | u32 t; | |
174 | ||
175 | t = mem >> 16; | |
176 | if (t == 0x1f80) { | |
177 | if (mem < 0x1f801000) | |
178 | return psxHu16(mem); | |
179 | else | |
180 | return psxHwRead16(mem); | |
181 | } else { | |
182 | p = (char *)(psxMemRLUT[t]); | |
183 | if (p != NULL) { | |
184 | if (Config.Debug) | |
185 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R2); | |
186 | return SWAPu16(*(u16 *)(p + (mem & 0xffff))); | |
187 | } else { | |
188 | #ifdef PSXMEM_LOG | |
189 | PSXMEM_LOG("err lh %8.8lx\n", mem); | |
190 | #endif | |
191 | return 0; | |
192 | } | |
193 | } | |
194 | } | |
195 | ||
196 | u32 psxMemRead32(u32 mem) { | |
197 | char *p; | |
198 | u32 t; | |
199 | ||
200 | t = mem >> 16; | |
201 | if (t == 0x1f80) { | |
202 | if (mem < 0x1f801000) | |
203 | return psxHu32(mem); | |
204 | else | |
205 | return psxHwRead32(mem); | |
206 | } else { | |
207 | p = (char *)(psxMemRLUT[t]); | |
208 | if (p != NULL) { | |
209 | if (Config.Debug) | |
210 | DebugCheckBP((mem & 0xffffff) | 0x80000000, R4); | |
211 | return SWAPu32(*(u32 *)(p + (mem & 0xffff))); | |
212 | } else { | |
213 | #ifdef PSXMEM_LOG | |
214 | if (writeok) { PSXMEM_LOG("err lw %8.8lx\n", mem); } | |
215 | #endif | |
216 | return 0; | |
217 | } | |
218 | } | |
219 | } | |
220 | ||
221 | void psxMemWrite8(u32 mem, u8 value) { | |
222 | char *p; | |
223 | u32 t; | |
224 | ||
225 | t = mem >> 16; | |
226 | if (t == 0x1f80) { | |
227 | if (mem < 0x1f801000) | |
228 | psxHu8(mem) = value; | |
229 | else | |
230 | psxHwWrite8(mem, value); | |
231 | } else { | |
232 | p = (char *)(psxMemWLUT[t]); | |
233 | if (p != NULL) { | |
234 | if (Config.Debug) | |
235 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W1); | |
236 | *(u8 *)(p + (mem & 0xffff)) = value; | |
237 | #ifdef PSXREC | |
238 | psxCpu->Clear((mem & (~3)), 1); | |
239 | #endif | |
240 | } else { | |
241 | #ifdef PSXMEM_LOG | |
242 | PSXMEM_LOG("err sb %8.8lx\n", mem); | |
243 | #endif | |
244 | } | |
245 | } | |
246 | } | |
247 | ||
248 | void psxMemWrite16(u32 mem, u16 value) { | |
249 | char *p; | |
250 | u32 t; | |
251 | ||
252 | t = mem >> 16; | |
253 | if (t == 0x1f80) { | |
254 | if (mem < 0x1f801000) | |
255 | psxHu16ref(mem) = SWAPu16(value); | |
256 | else | |
257 | psxHwWrite16(mem, value); | |
258 | } else { | |
259 | p = (char *)(psxMemWLUT[t]); | |
260 | if (p != NULL) { | |
261 | if (Config.Debug) | |
262 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W2); | |
263 | *(u16 *)(p + (mem & 0xffff)) = SWAPu16(value); | |
264 | #ifdef PSXREC | |
3e31e934 | 265 | psxCpu->Clear((mem & (~3)), 1); |
ef79bbde P |
266 | #endif |
267 | } else { | |
268 | #ifdef PSXMEM_LOG | |
269 | PSXMEM_LOG("err sh %8.8lx\n", mem); | |
270 | #endif | |
271 | } | |
272 | } | |
273 | } | |
274 | ||
275 | void psxMemWrite32(u32 mem, u32 value) { | |
276 | char *p; | |
277 | u32 t; | |
278 | ||
279 | // if ((mem&0x1fffff) == 0x71E18 || value == 0x48088800) SysPrintf("t2fix!!\n"); | |
280 | t = mem >> 16; | |
281 | if (t == 0x1f80) { | |
282 | if (mem < 0x1f801000) | |
283 | psxHu32ref(mem) = SWAPu32(value); | |
284 | else | |
285 | psxHwWrite32(mem, value); | |
286 | } else { | |
287 | p = (char *)(psxMemWLUT[t]); | |
288 | if (p != NULL) { | |
289 | if (Config.Debug) | |
290 | DebugCheckBP((mem & 0xffffff) | 0x80000000, W4); | |
291 | *(u32 *)(p + (mem & 0xffff)) = SWAPu32(value); | |
292 | #ifdef PSXREC | |
293 | psxCpu->Clear(mem, 1); | |
294 | #endif | |
295 | } else { | |
296 | if (mem != 0xfffe0130) { | |
297 | #ifdef PSXREC | |
298 | if (!writeok) | |
299 | psxCpu->Clear(mem, 1); | |
300 | #endif | |
301 | ||
302 | #ifdef PSXMEM_LOG | |
303 | if (writeok) { PSXMEM_LOG("err sw %8.8lx\n", mem); } | |
304 | #endif | |
305 | } else { | |
306 | int i; | |
307 | ||
308 | switch (value) { | |
309 | case 0x800: case 0x804: | |
310 | if (writeok == 0) break; | |
311 | writeok = 0; | |
312 | memset(psxMemWLUT + 0x0000, 0, 0x80 * sizeof(void *)); | |
313 | memset(psxMemWLUT + 0x8000, 0, 0x80 * sizeof(void *)); | |
314 | memset(psxMemWLUT + 0xa000, 0, 0x80 * sizeof(void *)); | |
315 | break; | |
316 | case 0x00: case 0x1e988: | |
317 | if (writeok == 1) break; | |
318 | writeok = 1; | |
319 | for (i = 0; i < 0x80; i++) psxMemWLUT[i + 0x0000] = (void *)&psxM[(i & 0x1f) << 16]; | |
320 | memcpy(psxMemWLUT + 0x8000, psxMemWLUT, 0x80 * sizeof(void *)); | |
321 | memcpy(psxMemWLUT + 0xa000, psxMemWLUT, 0x80 * sizeof(void *)); | |
322 | break; | |
323 | default: | |
324 | #ifdef PSXMEM_LOG | |
325 | PSXMEM_LOG("unk %8.8lx = %x\n", mem, value); | |
326 | #endif | |
327 | break; | |
328 | } | |
329 | } | |
330 | } | |
331 | } | |
332 | } | |
333 | ||
334 | void *psxMemPointer(u32 mem) { | |
335 | char *p; | |
336 | u32 t; | |
337 | ||
338 | t = mem >> 16; | |
339 | if (t == 0x1f80) { | |
340 | if (mem < 0x1f801000) | |
341 | return (void *)&psxH[mem]; | |
342 | else | |
343 | return NULL; | |
344 | } else { | |
345 | p = (char *)(psxMemWLUT[t]); | |
346 | if (p != NULL) { | |
347 | return (void *)(p + (mem & 0xffff)); | |
348 | } | |
349 | return NULL; | |
350 | } | |
351 | } |