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32x: famec support
[picodrive.git] / pico / cart.c
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cc68a136 1// This is part of Pico Library\r
2\r
3// (c) Copyright 2004 Dave, All rights reserved.\r
6cadc2da 4// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r
cc68a136 5// Free for non-commercial use.\r
6\r
7// For commercial use, separate licencing terms must be obtained.\r
8\r
9\r
efcba75f 10#include "pico_int.h"\r
83bd0b76 11#include "../zlib/zlib.h"\r
12#include "../unzip/unzip.h"\r
13#include "../unzip/unzip_stream.h"\r
14\r
7336a99a 15\r
3e49ffd0 16static const char *rom_exts[] = { "bin", "gen", "smd", "iso", "sms", "gg", "sg" };\r
83bd0b76 17\r
45f2f245 18void (*PicoCartUnloadHook)(void);\r
19void (*PicoCartMemSetup)(void);\r
e807ac75 20\r
a9b3ffd3 21void (*PicoCartLoadProgressCB)(int percent) = NULL;\r
b2451ac6 22void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled in Pico/cd/cd_file.c\r
a9b3ffd3 23\r
d6114368 24static void PicoCartDetect(void);\r
25\r
71de3cd9 26/* cso struct */\r
27typedef struct _cso_struct\r
28{\r
29 unsigned char in_buff[2*2048];\r
30 unsigned char out_buff[2048];\r
31 struct {\r
32 char magic[4];\r
33 unsigned int unused;\r
34 unsigned int total_bytes;\r
35 unsigned int total_bytes_high; // ignored here\r
36 unsigned int block_size; // 10h\r
37 unsigned char ver;\r
38 unsigned char align;\r
39 unsigned char reserved[2];\r
40 } header;\r
41 unsigned int fpos_in; // input file read pointer\r
42 unsigned int fpos_out; // pos in virtual decompressed file\r
43 int block_in_buff; // block which we have read in in_buff\r
44 int pad;\r
45 int index[0];\r
46}\r
47cso_struct;\r
48\r
49static int uncompress2(void *dest, int destLen, void *source, int sourceLen)\r
50{\r
51 z_stream stream;\r
52 int err;\r
53\r
54 stream.next_in = (Bytef*)source;\r
55 stream.avail_in = (uInt)sourceLen;\r
56 stream.next_out = dest;\r
57 stream.avail_out = (uInt)destLen;\r
58\r
59 stream.zalloc = NULL;\r
60 stream.zfree = NULL;\r
61\r
62 err = inflateInit2(&stream, -15);\r
63 if (err != Z_OK) return err;\r
64\r
65 err = inflate(&stream, Z_FINISH);\r
66 if (err != Z_STREAM_END) {\r
67 inflateEnd(&stream);\r
68 return err;\r
69 }\r
70 //*destLen = stream.total_out;\r
71\r
72 return inflateEnd(&stream);\r
73}\r
83bd0b76 74\r
87b0845f 75static const char *get_ext(const char *path)\r
76{\r
77 const char *ext;\r
78 if (strlen(path) < 4)\r
79 return ""; // no ext\r
80\r
81 // allow 2 or 3 char extensions for now\r
82 ext = path + strlen(path) - 2;\r
83 if (ext[-1] != '.') ext--;\r
84 if (ext[-1] != '.')\r
85 return "";\r
86 return ext;\r
87}\r
88\r
83bd0b76 89pm_file *pm_open(const char *path)\r
90{\r
91 pm_file *file = NULL;\r
92 const char *ext;\r
93 FILE *f;\r
94\r
87b0845f 95 if (path == NULL)\r
96 return NULL;\r
83bd0b76 97\r
87b0845f 98 ext = get_ext(path);\r
99 if (strcasecmp(ext, "zip") == 0)\r
83bd0b76 100 {\r
101 struct zipent *zipentry;\r
102 gzFile gzf = NULL;\r
103 ZIP *zipfile;\r
104 int i;\r
105\r
106 zipfile = openzip(path);\r
83bd0b76 107 if (zipfile != NULL)\r
108 {\r
109 /* search for suitable file (right extension or large enough file) */\r
110 while ((zipentry = readzip(zipfile)) != NULL)\r
111 {\r
87b0845f 112 ext = get_ext(zipentry->name);\r
83bd0b76 113\r
87b0845f 114 if (zipentry->uncompressed_size >= 32*1024)\r
115 goto found_rom_zip;\r
3e49ffd0 116\r
83bd0b76 117 for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++)\r
87b0845f 118 if (strcasecmp(ext, rom_exts[i]) == 0)\r
119 goto found_rom_zip;\r
83bd0b76 120 }\r
121\r
122 /* zipfile given, but nothing found suitable for us inside */\r
123 goto zip_failed;\r
124\r
125found_rom_zip:\r
126 /* try to convert to gzip stream, so we could use standard gzio functions from zlib */\r
127 gzf = zip2gz(zipfile, zipentry);\r
128 if (gzf == NULL) goto zip_failed;\r
129\r
87b0845f 130 file = calloc(1, sizeof(*file));\r
83bd0b76 131 if (file == NULL) goto zip_failed;\r
132 file->file = zipfile;\r
133 file->param = gzf;\r
134 file->size = zipentry->uncompressed_size;\r
135 file->type = PMT_ZIP;\r
87b0845f 136 strncpy(file->ext, ext, sizeof(file->ext) - 1);\r
83bd0b76 137 return file;\r
138\r
139zip_failed:\r
140 if (gzf) {\r
141 gzclose(gzf);\r
142 zipfile->fp = NULL; // gzclose() closed it\r
143 }\r
144 closezip(zipfile);\r
145 return NULL;\r
146 }\r
147 }\r
87b0845f 148 else if (strcasecmp(ext, "cso") == 0)\r
71de3cd9 149 {\r
150 cso_struct *cso = NULL, *tmp = NULL;\r
151 int size;\r
152 f = fopen(path, "rb");\r
153 if (f == NULL)\r
154 goto cso_failed;\r
155\r
f8af9634 156#ifndef __EPOC32__\r
2d2247c2 157 /* we use our own buffering */\r
158 setvbuf(f, NULL, _IONBF, 0);\r
f8af9634 159#endif\r
2d2247c2 160\r
71de3cd9 161 cso = malloc(sizeof(*cso));\r
162 if (cso == NULL)\r
163 goto cso_failed;\r
164\r
165 if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))\r
166 goto cso_failed;\r
167\r
168 if (strncmp(cso->header.magic, "CISO", 4) != 0) {\r
169 elprintf(EL_STATUS, "cso: bad header");\r
170 goto cso_failed;\r
171 }\r
172\r
173 if (cso->header.block_size != 2048) {\r
174 elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size);\r
175 goto cso_failed;\r
176 }\r
177\r
178 size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso);\r
179 tmp = realloc(cso, size);\r
180 if (tmp == NULL)\r
181 goto cso_failed;\r
182 cso = tmp;\r
183 elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size);\r
184\r
185 size -= sizeof(*cso); // index size\r
186 if (fread(cso->index, 1, size, f) != size) {\r
187 elprintf(EL_STATUS, "cso: premature EOF");\r
188 goto cso_failed;\r
189 }\r
190\r
191 // all ok\r
192 cso->fpos_in = ftell(f);\r
193 cso->fpos_out = 0;\r
194 cso->block_in_buff = -1;\r
87b0845f 195 file = calloc(1, sizeof(*file));\r
71de3cd9 196 if (file == NULL) goto cso_failed;\r
197 file->file = f;\r
198 file->param = cso;\r
199 file->size = cso->header.total_bytes;\r
200 file->type = PMT_CSO;\r
201 return file;\r
202\r
203cso_failed:\r
204 if (cso != NULL) free(cso);\r
205 if (f != NULL) fclose(f);\r
206 return NULL;\r
207 }\r
83bd0b76 208\r
209 /* not a zip, treat as uncompressed file */\r
210 f = fopen(path, "rb");\r
211 if (f == NULL) return NULL;\r
212\r
87b0845f 213 file = calloc(1, sizeof(*file));\r
83bd0b76 214 if (file == NULL) {\r
215 fclose(f);\r
216 return NULL;\r
217 }\r
218 fseek(f, 0, SEEK_END);\r
219 file->file = f;\r
220 file->param = NULL;\r
221 file->size = ftell(f);\r
222 file->type = PMT_UNCOMPRESSED;\r
87b0845f 223 strncpy(file->ext, ext, sizeof(file->ext) - 1);\r
83bd0b76 224 fseek(f, 0, SEEK_SET);\r
d6114368 225\r
f8af9634 226#ifndef __EPOC32__ // makes things worse on Symbian\r
227 if (file->size > 0x400000)\r
228 /* we use our own buffering */\r
229 setvbuf(f, NULL, _IONBF, 0);\r
230#endif\r
231\r
83bd0b76 232 return file;\r
233}\r
234\r
235size_t pm_read(void *ptr, size_t bytes, pm_file *stream)\r
236{\r
237 int ret;\r
238\r
239 if (stream->type == PMT_UNCOMPRESSED)\r
240 {\r
241 ret = fread(ptr, 1, bytes, stream->file);\r
242 }\r
243 else if (stream->type == PMT_ZIP)\r
244 {\r
245 gzFile gf = stream->param;\r
246 int err;\r
247 ret = gzread(gf, ptr, bytes);\r
248 err = gzerror2(gf);\r
249 if (ret > 0 && (err == Z_DATA_ERROR || err == Z_STREAM_END))\r
250 /* we must reset stream pointer or else next seek/read fails */\r
251 gzrewind(gf);\r
252 }\r
71de3cd9 253 else if (stream->type == PMT_CSO)\r
254 {\r
255 cso_struct *cso = stream->param;\r
256 int read_pos, read_len, out_offs, rret;\r
257 int block = cso->fpos_out >> 11;\r
258 int index = cso->index[block];\r
259 int index_end = cso->index[block+1];\r
260 unsigned char *out = ptr, *tmp_dst;\r
261\r
262 ret = 0;\r
263 while (bytes != 0)\r
264 {\r
265 out_offs = cso->fpos_out&0x7ff;\r
266 if (out_offs == 0 && bytes >= 2048)\r
267 tmp_dst = out;\r
268 else tmp_dst = cso->out_buff;\r
269\r
270 read_pos = (index&0x7fffffff) << cso->header.align;\r
271\r
272 if (index < 0) {\r
273 if (read_pos != cso->fpos_in)\r
274 fseek(stream->file, read_pos, SEEK_SET);\r
275 rret = fread(tmp_dst, 1, 2048, stream->file);\r
276 cso->fpos_in = read_pos + rret;\r
277 if (rret != 2048) break;\r
278 } else {\r
279 read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff;\r
280 if (block != cso->block_in_buff)\r
281 {\r
282 if (read_pos != cso->fpos_in)\r
ff6b7429 283 fseek(stream->file, read_pos, SEEK_SET);\r
71de3cd9 284 rret = fread(cso->in_buff, 1, read_len, stream->file);\r
285 cso->fpos_in = read_pos + rret;\r
286 if (rret != read_len) {\r
287 elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos);\r
288 break;\r
289 }\r
290 cso->block_in_buff = block;\r
291 }\r
292 rret = uncompress2(tmp_dst, 2048, cso->in_buff, read_len);\r
293 if (rret != 0) {\r
294 elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret);\r
295 break;\r
296 }\r
297 }\r
298\r
299 rret = 2048;\r
300 if (out_offs != 0 || bytes < 2048) {\r
301 //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes);\r
302 if (bytes < rret) rret = bytes;\r
303 if (2048 - out_offs < rret) rret = 2048 - out_offs;\r
304 memcpy(out, tmp_dst + out_offs, rret);\r
305 }\r
306 ret += rret;\r
307 out += rret;\r
308 cso->fpos_out += rret;\r
309 bytes -= rret;\r
310 block++;\r
311 index = index_end;\r
312 index_end = cso->index[block+1];\r
313 }\r
314 }\r
83bd0b76 315 else\r
316 ret = 0;\r
317\r
318 return ret;\r
319}\r
320\r
321int pm_seek(pm_file *stream, long offset, int whence)\r
322{\r
323 if (stream->type == PMT_UNCOMPRESSED)\r
324 {\r
7336a99a 325 fseek(stream->file, offset, whence);\r
326 return ftell(stream->file);\r
83bd0b76 327 }\r
328 else if (stream->type == PMT_ZIP)\r
329 {\r
66fdc0f0 330 if (PicoMessage != NULL && offset > 6*1024*1024) {\r
331 long pos = gztell((gzFile) stream->param);\r
332 if (offset < pos || offset - pos > 6*1024*1024)\r
333 PicoMessage("Decompressing data...");\r
334 }\r
83bd0b76 335 return gzseek((gzFile) stream->param, offset, whence);\r
336 }\r
71de3cd9 337 else if (stream->type == PMT_CSO)\r
338 {\r
339 cso_struct *cso = stream->param;\r
340 switch (whence)\r
341 {\r
342 case SEEK_CUR: cso->fpos_out += offset; break;\r
343 case SEEK_SET: cso->fpos_out = offset; break;\r
344 case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break;\r
345 }\r
346 return cso->fpos_out;\r
347 }\r
83bd0b76 348 else\r
349 return -1;\r
350}\r
351\r
352int pm_close(pm_file *fp)\r
353{\r
354 int ret = 0;\r
355\r
356 if (fp == NULL) return EOF;\r
357\r
358 if (fp->type == PMT_UNCOMPRESSED)\r
359 {\r
360 fclose(fp->file);\r
361 }\r
362 else if (fp->type == PMT_ZIP)\r
363 {\r
364 ZIP *zipfile = fp->file;\r
365 gzclose((gzFile) fp->param);\r
366 zipfile->fp = NULL; // gzclose() closed it\r
367 closezip(zipfile);\r
368 }\r
71de3cd9 369 else if (fp->type == PMT_CSO)\r
370 {\r
371 free(fp->param);\r
372 fclose(fp->file);\r
373 }\r
83bd0b76 374 else\r
375 ret = EOF;\r
376\r
377 free(fp);\r
378 return ret;\r
379}\r
380\r
83ff19ec 381// byteswap, data needs to be int aligned, src can match dst\r
382void Byteswap(void *dst, const void *src, int len)\r
cc68a136 383{\r
83ff19ec 384 const unsigned int *ps = src;\r
385 unsigned int *pd = dst;\r
386 int i, m;\r
cc68a136 387\r
83ff19ec 388 if (len < 2)\r
389 return;\r
cc68a136 390\r
83ff19ec 391 m = 0x00ff00ff;\r
392 for (i = 0; i < len / 4; i++) {\r
393 unsigned int t = ps[i];\r
394 pd[i] = ((t & m) << 8) | ((t & ~m) >> 8);\r
cc68a136 395 }\r
cc68a136 396}\r
397\r
398// Interleve a 16k block and byteswap\r
399static int InterleveBlock(unsigned char *dest,unsigned char *src)\r
400{\r
401 int i=0;\r
402 for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd\r
403 for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even\r
404 return 0;\r
405}\r
406\r
407// Decode a SMD file\r
408static int DecodeSmd(unsigned char *data,int len)\r
409{\r
410 unsigned char *temp=NULL;\r
411 int i=0;\r
412\r
413 temp=(unsigned char *)malloc(0x4000);\r
414 if (temp==NULL) return 1;\r
415 memset(temp,0,0x4000);\r
416\r
417 // Interleve each 16k block and shift down by 0x200:\r
418 for (i=0; i+0x4200<=len; i+=0x4000)\r
419 {\r
420 InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer\r
421 memcpy(data+i,temp,0x4000); // Copy back in\r
422 }\r
423\r
424 free(temp);\r
425 return 0;\r
426}\r
427\r
bf098bc5 428static unsigned char *cd_realloc(void *old, int filesize)\r
429{\r
430 unsigned char *rom;\r
bf098bc5 431 rom=realloc(old, sizeof(mcd_state));\r
432 if (rom) memset(rom+0x20000, 0, sizeof(mcd_state)-0x20000);\r
433 return rom;\r
434}\r
435\r
87b0845f 436static unsigned char *PicoCartAlloc(int filesize, int is_sms)\r
cc68a136 437{\r
438 int alloc_size;\r
439 unsigned char *rom;\r
440\r
87b0845f 441 if (PicoAHW & PAHW_MCD)\r
442 return cd_realloc(NULL, filesize);\r
443\r
444 if (is_sms) {\r
445 // make size power of 2 for easier banking handling\r
446 int s = 0, tmp = filesize;\r
447 while ((tmp >>= 1) != 0)\r
448 s++;\r
449 if (filesize > (1 << s))\r
450 s++;\r
451 alloc_size = 1 << s;\r
452 }\r
453 else {\r
454 // align to 512K for memhandlers\r
455 alloc_size = (filesize + 0x7ffff) & ~0x7ffff;\r
456 }\r
cc68a136 457\r
87b0845f 458 if (alloc_size - filesize < 4)\r
459 alloc_size += 4; // padding for out-of-bound exec protection\r
cc68a136 460\r
461 // Allocate space for the rom plus padding\r
87b0845f 462 rom = calloc(alloc_size, 1);\r
cc68a136 463 return rom;\r
464}\r
465\r
3e49ffd0 466int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)\r
cc68a136 467{\r
87b0845f 468 unsigned char *rom;\r
469 int size, bytes_read;\r
cc68a136 470\r
87b0845f 471 if (f == NULL)\r
472 return 1;\r
473\r
474 size = f->size;\r
cc68a136 475 if (size <= 0) return 1;\r
87b0845f 476 size = (size+3)&~3; // Round up to a multiple of 4\r
cc68a136 477\r
478 // Allocate space for the rom plus padding\r
87b0845f 479 rom = PicoCartAlloc(size, is_sms);\r
480 if (rom == NULL) {\r
c6196c0f 481 elprintf(EL_STATUS, "out of memory (wanted %i)", size);\r
f8af9634 482 return 2;\r
7336a99a 483 }\r
cc68a136 484\r
a9b3ffd3 485 if (PicoCartLoadProgressCB != NULL)\r
486 {\r
487 // read ROM in blocks, just for fun\r
488 int ret;\r
489 unsigned char *p = rom;\r
490 bytes_read=0;\r
491 do\r
492 {\r
493 int todo = size - bytes_read;\r
494 if (todo > 256*1024) todo = 256*1024;\r
495 ret = pm_read(p,todo,f);\r
496 bytes_read += ret;\r
497 p += ret;\r
498 PicoCartLoadProgressCB(bytes_read * 100 / size);\r
499 }\r
500 while (ret > 0);\r
501 }\r
502 else\r
503 bytes_read = pm_read(rom,size,f); // Load up the rom\r
504 if (bytes_read <= 0) {\r
c6196c0f 505 elprintf(EL_STATUS, "read failed");\r
a9b3ffd3 506 free(rom);\r
f8af9634 507 return 3;\r
a9b3ffd3 508 }\r
bf098bc5 509\r
3e49ffd0 510 if (!is_sms)\r
511 {\r
512 // maybe we are loading MegaCD BIOS?\r
513 if (!(PicoAHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||\r
514 !strncmp((char *)rom+0x128, "BOOT", 4))) {\r
515 PicoAHW |= PAHW_MCD;\r
516 rom = cd_realloc(rom, size);\r
517 }\r
cc68a136 518\r
3e49ffd0 519 // Check for SMD:\r
87b0845f 520 if (size >= 0x4200 && (size&0x3fff) == 0x200 &&\r
3e49ffd0 521 ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {\r
87b0845f 522 elprintf(EL_STATUS, "SMD format detected.");\r
3e49ffd0 523 DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD\r
524 }\r
83ff19ec 525 else Byteswap(rom, rom, size); // Just byteswap\r
21395e38 526 }\r
87b0845f 527 else\r
528 {\r
529 if (size >= 0x4200 && (size&0x3fff) == 0x200) {\r
530 elprintf(EL_STATUS, "SMD format detected.");\r
531 // at least here it's not interleaved\r
532 size -= 0x200;\r
533 memmove(rom, rom + 0x200, size);\r
534 }\r
535 }\r
cc68a136 536\r
87b0845f 537 if (prom) *prom = rom;\r
538 if (psize) *psize = size;\r
cc68a136 539\r
540 return 0;\r
541}\r
542\r
f8ef8ff7 543// Insert a cartridge:\r
cc68a136 544int PicoCartInsert(unsigned char *rom,unsigned int romsize)\r
545{\r
546 // notaz: add a 68k "jump one op back" opcode to the end of ROM.\r
547 // This will hang the emu, but will prevent nasty crashes.\r
548 // note: 4 bytes are padded to every ROM\r
d6114368 549 if (rom != NULL)\r
cc68a136 550 *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped\r
551\r
cc68a136 552 Pico.rom=rom;\r
553 Pico.romsize=romsize;\r
554\r
d6114368 555 if (SRam.data) {\r
556 free(SRam.data);\r
557 SRam.data = NULL;\r
558 }\r
559\r
e807ac75 560 if (PicoCartUnloadHook != NULL) {\r
561 PicoCartUnloadHook();\r
562 PicoCartUnloadHook = NULL;\r
563 }\r
564\r
3e49ffd0 565 PicoAHW &= PAHW_MCD|PAHW_SMS;\r
602133e1 566\r
45f2f245 567 PicoCartMemSetup = NULL;\r
f8ef8ff7 568 PicoDmaHook = NULL;\r
569 PicoResetHook = NULL;\r
017512f2 570 PicoLineHook = NULL;\r
fad24893 571 PicoLoadStateHook = NULL;\r
945c2fdc 572 carthw_chunks = NULL;\r
f8ef8ff7 573\r
3e49ffd0 574 if (!(PicoAHW & (PAHW_MCD|PAHW_SMS)))\r
f8ef8ff7 575 PicoCartDetect();\r
576\r
1dceadae 577 // setup correct memory map for loaded ROM\r
9037e45d 578 switch (PicoAHW) {\r
579 default:\r
580 elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoAHW);\r
581 case 0:\r
582 case PAHW_SVP: PicoMemSetup(); break;\r
583 case PAHW_MCD: PicoMemSetupCD(); break;\r
584 case PAHW_PICO: PicoMemSetupPico(); break;\r
3e49ffd0 585 case PAHW_SMS: PicoMemSetupMS(); break;\r
9037e45d 586 }\r
1dceadae 587\r
45f2f245 588 if (PicoCartMemSetup != NULL)\r
589 PicoCartMemSetup();\r
590\r
3e49ffd0 591 if (PicoAHW & PAHW_SMS)\r
592 PicoPowerMS();\r
593 else\r
594 PicoPower();\r
595\r
1cb1584b 596 return 0;\r
cc68a136 597}\r
598\r
2aa27095 599void PicoCartUnload(void)\r
cc68a136 600{\r
3e49ffd0 601 if (PicoCartUnloadHook != NULL) {\r
602 PicoCartUnloadHook();\r
603 PicoCartUnloadHook = NULL;\r
604 }\r
605\r
5e49c3a8 606 if (PicoAHW & PAHW_32X)\r
607 PicoUnload32x();\r
608\r
a12b1b29 609 if (Pico.rom != NULL) {\r
053fd9b4 610 SekFinishIdleDet();\r
a12b1b29 611 free(Pico.rom);\r
612 Pico.rom=NULL;\r
613 }\r
cc68a136 614}\r
615\r
000f5335 616static unsigned int rom_crc32(void)\r
617{\r
618 unsigned int crc;\r
619 elprintf(EL_STATUS, "caclulating CRC32..");\r
620\r
621 // have to unbyteswap for calculation..\r
83ff19ec 622 Byteswap(Pico.rom, Pico.rom, Pico.romsize);\r
000f5335 623 crc = crc32(0, Pico.rom, Pico.romsize);\r
83ff19ec 624 Byteswap(Pico.rom, Pico.rom, Pico.romsize);\r
000f5335 625 return crc;\r
626}\r
627\r
1f4e9f14 628static int rom_strcmp(int rom_offset, const char *s1)\r
1dceadae 629{\r
1f4e9f14 630 int i, len = strlen(s1);\r
45f2f245 631 const char *s_rom = (const char *)Pico.rom;\r
1dceadae 632 for (i = 0; i < len; i++)\r
45f2f245 633 if (s1[i] != s_rom[(i + rom_offset) ^ 1])\r
1dceadae 634 return 1;\r
635 return 0;\r
636}\r
637\r
af37bca8 638static unsigned int rom_read32(int addr)\r
639{\r
640 unsigned short *m = (unsigned short *)(Pico.rom + addr);\r
641 return (m[0] << 16) | m[1];\r
642}\r
643\r
45f2f245 644static char *sskip(char *s)\r
645{\r
646 while (*s && isspace_(*s))\r
647 s++;\r
648 return s;\r
649}\r
650\r
651static void rstrip(char *s)\r
652{\r
653 char *p;\r
654 for (p = s + strlen(s) - 1; p >= s; p--)\r
655 if (isspace_(*p))\r
656 *p = 0;\r
657}\r
658\r
000f5335 659static int parse_3_vals(char *p, int *val0, int *val1, int *val2)\r
660{\r
661 char *r;\r
662 *val0 = strtoul(p, &r, 0);\r
663 if (r == p)\r
664 goto bad;\r
665 p = sskip(r);\r
666 if (*p++ != ',')\r
667 goto bad;\r
668 *val1 = strtoul(p, &r, 0);\r
669 if (r == p)\r
670 goto bad;\r
671 p = sskip(r);\r
672 if (*p++ != ',')\r
673 goto bad;\r
674 *val2 = strtoul(p, &r, 0);\r
675 if (r == p)\r
676 goto bad;\r
677\r
678 return 1;\r
679bad:\r
680 return 0;\r
681}\r
682\r
45f2f245 683static int is_expr(const char *expr, char **pr)\r
684{\r
685 int len = strlen(expr);\r
686 char *p = *pr;\r
687\r
688 if (strncmp(expr, p, len) != 0)\r
689 return 0;\r
690 p = sskip(p + len);\r
691 if (*p != '=')\r
692 return 0; // wrong or malformed\r
693\r
694 *pr = sskip(p + 1);\r
695 return 1;\r
696}\r
697\r
698static void parse_carthw(int *fill_sram)\r
699{\r
700 int line = 0, any_checks_passed = 0, skip_sect = 0;\r
000f5335 701 int tmp, rom_crc = 0;\r
45f2f245 702 char buff[256], *p, *r;\r
703 FILE *f;\r
704\r
705 f = fopen("carthw.cfg", "r");\r
706 if (f == NULL) {\r
707 elprintf(EL_STATUS, "couldn't open carthw.txt!");\r
708 return;\r
709 }\r
710\r
711 while ((p = fgets(buff, sizeof(buff), f)))\r
712 {\r
713 line++;\r
714 p = sskip(p);\r
715 if (*p == 0 || *p == '#')\r
716 continue;\r
717\r
718 if (*p == '[') {\r
719 any_checks_passed = 0;\r
720 skip_sect = 0;\r
721 continue;\r
722 }\r
723 \r
724 if (skip_sect)\r
725 continue;\r
726\r
727 /* look for checks */\r
728 if (is_expr("check_str", &p))\r
729 {\r
730 int offs;\r
731 offs = strtoul(p, &r, 0);\r
732 if (offs < 0 || offs > Pico.romsize) {\r
733 elprintf(EL_STATUS, "carthw:%d: check_str offs out of range: %d\n", line, offs);\r
734 goto bad;\r
735 }\r
736 p = sskip(r);\r
737 if (*p != ',')\r
738 goto bad;\r
739 p = sskip(p + 1);\r
740 if (*p != '"')\r
741 goto bad;\r
742 p++;\r
743 r = strchr(p, '"');\r
744 if (r == NULL)\r
745 goto bad;\r
746 *r = 0;\r
747\r
748 if (rom_strcmp(offs, p) == 0)\r
749 any_checks_passed = 1;\r
750 else\r
751 skip_sect = 1;\r
752 continue;\r
753 }\r
754 else if (is_expr("check_size_gt", &p))\r
755 {\r
756 int size;\r
757 size = strtoul(p, &r, 0);\r
758 if (r == p || size < 0)\r
759 goto bad;\r
760\r
761 if (Pico.romsize > size)\r
762 any_checks_passed = 1;\r
763 else\r
764 skip_sect = 1;\r
765 continue;\r
766 }\r
767 else if (is_expr("check_csum", &p))\r
768 {\r
769 int csum;\r
770 csum = strtoul(p, &r, 0);\r
771 if (r == p || (csum & 0xffff0000))\r
772 goto bad;\r
773\r
774 if (csum == (rom_read32(0x18c) & 0xffff))\r
775 any_checks_passed = 1;\r
776 else\r
777 skip_sect = 1;\r
778 continue;\r
779 }\r
000f5335 780 else if (is_expr("check_crc32", &p))\r
781 {\r
782 unsigned int crc;\r
783 crc = strtoul(p, &r, 0);\r
784 if (r == p)\r
785 goto bad;\r
786\r
787 if (rom_crc == 0)\r
788 rom_crc = rom_crc32();\r
789 if (crc == rom_crc)\r
790 any_checks_passed = 1;\r
791 else\r
792 skip_sect = 1;\r
793 continue;\r
794 }\r
45f2f245 795\r
796 /* now time for actions */\r
797 if (is_expr("hw", &p)) {\r
798 if (!any_checks_passed)\r
799 goto no_checks;\r
800 rstrip(p);\r
801\r
802 if (strcmp(p, "svp") == 0)\r
803 PicoSVPStartup();\r
804 else if (strcmp(p, "pico") == 0)\r
805 PicoInitPico();\r
000f5335 806 else if (strcmp(p, "prot") == 0)\r
807 carthw_sprot_startup();\r
808 else if (strcmp(p, "ssf2_mapper") == 0)\r
809 carthw_ssf2_startup();\r
45f2f245 810 else if (strcmp(p, "x_in_1_mapper") == 0)\r
811 carthw_Xin1_startup();\r
812 else if (strcmp(p, "realtec_mapper") == 0)\r
813 carthw_realtec_startup();\r
814 else if (strcmp(p, "radica_mapper") == 0)\r
815 carthw_radica_startup();\r
000f5335 816 else if (strcmp(p, "prot_lk3") == 0)\r
817 carthw_prot_lk3_startup();\r
45f2f245 818 else {\r
819 elprintf(EL_STATUS, "carthw:%d: unsupported mapper: %s", line, p);\r
820 skip_sect = 1;\r
821 }\r
822 continue;\r
823 }\r
824 if (is_expr("sram_range", &p)) {\r
825 int start, end;\r
826\r
827 if (!any_checks_passed)\r
828 goto no_checks;\r
829 rstrip(p);\r
830\r
831 start = strtoul(p, &r, 0);\r
832 if (r == p)\r
833 goto bad;\r
834 p = sskip(r);\r
835 if (*p != ',')\r
836 goto bad;\r
837 p = sskip(p + 1);\r
838 end = strtoul(p, &r, 0);\r
839 if (r == p)\r
840 goto bad;\r
841 if (((start | end) & 0xff000000) || start > end) {\r
842 elprintf(EL_STATUS, "carthw:%d: bad sram_range: %08x - %08x", line, start, end);\r
843 goto bad_nomsg;\r
844 }\r
845 SRam.start = start;\r
846 SRam.end = end;\r
847 continue;\r
848 }\r
849 else if (is_expr("prop", &p)) {\r
850 if (!any_checks_passed)\r
851 goto no_checks;\r
852 rstrip(p);\r
853\r
854 if (strcmp(p, "no_sram") == 0)\r
855 SRam.flags &= ~SRF_ENABLED;\r
856 else if (strcmp(p, "no_eeprom") == 0)\r
857 SRam.flags &= ~SRF_EEPROM;\r
858 else if (strcmp(p, "filled_sram") == 0)\r
859 *fill_sram = 1;\r
860 else {\r
861 elprintf(EL_STATUS, "carthw:%d: unsupported prop: %s", line, p);\r
862 goto bad_nomsg;\r
863 }\r
864 continue;\r
865 }\r
866 else if (is_expr("eeprom_type", &p)) {\r
867 int type;\r
868 if (!any_checks_passed)\r
869 goto no_checks;\r
870 rstrip(p);\r
871\r
872 type = strtoul(p, &r, 0);\r
873 if (r == p || type < 0)\r
874 goto bad;\r
875 SRam.eeprom_type = type;\r
876 SRam.flags |= SRF_EEPROM;\r
877 continue;\r
878 }\r
879 else if (is_expr("eeprom_lines", &p)) {\r
880 int scl, sda_in, sda_out;\r
881 if (!any_checks_passed)\r
882 goto no_checks;\r
883 rstrip(p);\r
884\r
000f5335 885 if (!parse_3_vals(p, &scl, &sda_in, &sda_out))\r
45f2f245 886 goto bad;\r
000f5335 887 if (scl < 0 || scl > 15 || sda_in < 0 || sda_in > 15 ||\r
888 sda_out < 0 || sda_out > 15)\r
45f2f245 889 goto bad;\r
890\r
891 SRam.eeprom_bit_cl = scl;\r
892 SRam.eeprom_bit_in = sda_in;\r
893 SRam.eeprom_bit_out= sda_out;\r
894 continue;\r
895 }\r
000f5335 896 else if ((tmp = is_expr("prot_ro_value16", &p)) || is_expr("prot_rw_value16", &p)) {\r
897 int addr, mask, val;\r
898 if (!any_checks_passed)\r
899 goto no_checks;\r
900 rstrip(p);\r
901\r
902 if (!parse_3_vals(p, &addr, &mask, &val))\r
903 goto bad;\r
904\r
905 carthw_sprot_new_location(addr, mask, val, tmp ? 1 : 0);\r
906 continue;\r
907 }\r
45f2f245 908\r
909\r
910bad:\r
911 elprintf(EL_STATUS, "carthw:%d: unrecognized expression: %s", line, buff);\r
912bad_nomsg:\r
913 skip_sect = 1;\r
914 continue;\r
915\r
916no_checks:\r
917 elprintf(EL_STATUS, "carthw:%d: command without any checks before it: %s", line, buff);\r
918 skip_sect = 1;\r
919 continue;\r
920 }\r
921 fclose(f);\r
922}\r
923\r
a12b1b29 924/*\r
925 * various cart-specific things, which can't be handled by generic code\r
a12b1b29 926 */\r
d6114368 927static void PicoCartDetect(void)\r
1dceadae 928{\r
000f5335 929 int fill_sram = 0;\r
1dceadae 930\r
45f2f245 931 memset(&SRam, 0, sizeof(SRam));\r
1dceadae 932 if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')\r
933 {\r
45f2f245 934 SRam.start = rom_read32(0x1B4) & ~0xff000001; // align\r
935 SRam.end = (rom_read32(0x1B8) & ~0xff000000) | 1;\r
1dceadae 936 if (Pico.rom[0x1B2] & 0x40)\r
1dceadae 937 // EEPROM\r
45f2f245 938 SRam.flags |= SRF_EEPROM;\r
939 SRam.flags |= SRF_ENABLED;\r
1dceadae 940 }\r
45f2f245 941 if (SRam.end == 0 || SRam.start > SRam.end)\r
1dceadae 942 {\r
943 // some games may have bad headers, like S&K and Sonic3\r
944 // note: majority games use 0x200000 as starting address, but there are some which\r
945 // use something else (0x300000 by HardBall '95). Luckily they have good headers.\r
946 SRam.start = 0x200000;\r
947 SRam.end = 0x203FFF;\r
45f2f245 948 SRam.flags |= SRF_ENABLED;\r
1dceadae 949 }\r
1dceadae 950\r
951 // set EEPROM defaults, in case it gets detected\r
952 SRam.eeprom_type = 0; // 7bit (24C01)\r
1dceadae 953 SRam.eeprom_bit_cl = 1;\r
954 SRam.eeprom_bit_in = 0;\r
955 SRam.eeprom_bit_out= 0;\r
956\r
45f2f245 957 parse_carthw(&fill_sram);\r
9037e45d 958\r
45f2f245 959 if (SRam.flags & SRF_ENABLED)\r
757f8dae 960 {\r
45f2f245 961 if (SRam.flags & SRF_EEPROM)\r
962 SRam.size = 0x2000;\r
963 else\r
964 SRam.size = SRam.end - SRam.start + 1;\r
757f8dae 965\r
45f2f245 966 SRam.data = calloc(SRam.size, 1);\r
967 if (SRam.data == NULL)\r
968 SRam.flags &= ~SRF_ENABLED;\r
a12b1b29 969\r
45f2f245 970 if (SRam.eeprom_type == 1) // 1 == 0 in PD EEPROM code\r
971 SRam.eeprom_type = 0;\r
0b35350d 972 }\r
973\r
45f2f245 974 if ((SRam.flags & SRF_ENABLED) && fill_sram)\r
757f8dae 975 {\r
45f2f245 976 elprintf(EL_STATUS, "SRAM fill");\r
977 memset(SRam.data, 0xff, SRam.size);\r
757f8dae 978 }\r
1f4e9f14 979\r
980 // Unusual region 'code'\r
453d2a6e 981 if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)\r
45f2f245 982 *(int *) (Pico.rom + 0x1f0) = 0x20204520;\r
1dceadae 983}\r
984\r
fast MegaDrive/MegaCD/32X emulator