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 |
16 | static const char *rom_exts[] = { "bin", "gen", "smd", "iso", "sms", "gg", "sg" };\r |
83bd0b76 |
17 | \r |
45f2f245 |
18 | void (*PicoCartUnloadHook)(void);\r |
19 | void (*PicoCartMemSetup)(void);\r |
e807ac75 |
20 | \r |
a9b3ffd3 |
21 | void (*PicoCartLoadProgressCB)(int percent) = NULL;\r |
b2451ac6 |
22 | void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled in Pico/cd/cd_file.c\r |
a9b3ffd3 |
23 | \r |
ae87bffa |
24 | static void PicoCartDetect(const char *carthw_cfg);\r |
d6114368 |
25 | \r |
71de3cd9 |
26 | /* cso struct */\r |
27 | typedef 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 |
47 | cso_struct;\r |
48 | \r |
49 | static 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 |
75 | static 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 |
89 | pm_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 |
125 | found_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 |
139 | zip_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 |
203 | cso_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 |
235 | size_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 |
321 | int 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 |
352 | int 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 |
382 | void 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 |
399 | static 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 |
408 | static 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 |
428 | static 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 |
436 | static 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 |
466 | int 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 |
ae87bffa |
544 | int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_cfg)\r |
cc68a136 |
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 |
ae87bffa |
575 | PicoCartDetect(carthw_cfg);\r |
f8ef8ff7 |
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 |
599 | void 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 |
616 | static 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 |
628 | static 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 |
638 | static 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 |
644 | static char *sskip(char *s)\r |
645 | {\r |
646 | while (*s && isspace_(*s))\r |
647 | s++;\r |
648 | return s;\r |
649 | }\r |
650 | \r |
651 | static 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 |
659 | static 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 |
679 | bad:\r |
680 | return 0;\r |
681 | }\r |
682 | \r |
45f2f245 |
683 | static 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 |
ae87bffa |
698 | static void parse_carthw(const char *carthw_cfg, int *fill_sram)\r |
45f2f245 |
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 |
ae87bffa |
705 | f = fopen(carthw_cfg, "r");\r |
45f2f245 |
706 | if (f == NULL) {\r |
ae87bffa |
707 | elprintf(EL_STATUS, "couldn't open carthw.cfg!");\r |
45f2f245 |
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 |
910 | bad:\r |
911 | elprintf(EL_STATUS, "carthw:%d: unrecognized expression: %s", line, buff);\r |
912 | bad_nomsg:\r |
913 | skip_sect = 1;\r |
914 | continue;\r |
915 | \r |
916 | no_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 |
ae87bffa |
927 | static void PicoCartDetect(const char *carthw_cfg)\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 |
ae87bffa |
957 | if (carthw_cfg != NULL)\r |
958 | parse_carthw(carthw_cfg, &fill_sram);\r |
9037e45d |
959 | \r |
45f2f245 |
960 | if (SRam.flags & SRF_ENABLED)\r |
757f8dae |
961 | {\r |
45f2f245 |
962 | if (SRam.flags & SRF_EEPROM)\r |
963 | SRam.size = 0x2000;\r |
964 | else\r |
965 | SRam.size = SRam.end - SRam.start + 1;\r |
757f8dae |
966 | \r |
45f2f245 |
967 | SRam.data = calloc(SRam.size, 1);\r |
968 | if (SRam.data == NULL)\r |
969 | SRam.flags &= ~SRF_ENABLED;\r |
a12b1b29 |
970 | \r |
45f2f245 |
971 | if (SRam.eeprom_type == 1) // 1 == 0 in PD EEPROM code\r |
972 | SRam.eeprom_type = 0;\r |
0b35350d |
973 | }\r |
974 | \r |
45f2f245 |
975 | if ((SRam.flags & SRF_ENABLED) && fill_sram)\r |
757f8dae |
976 | {\r |
45f2f245 |
977 | elprintf(EL_STATUS, "SRAM fill");\r |
978 | memset(SRam.data, 0xff, SRam.size);\r |
757f8dae |
979 | }\r |
1f4e9f14 |
980 | \r |
981 | // Unusual region 'code'\r |
453d2a6e |
982 | if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)\r |
45f2f245 |
983 | *(int *) (Pico.rom + 0x1f0) = 0x20204520;\r |
1dceadae |
984 | }\r |
985 | \r |