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