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 |
b081408f |
16 | static int rom_alloc_size;\r |
3e49ffd0 |
17 | static const char *rom_exts[] = { "bin", "gen", "smd", "iso", "sms", "gg", "sg" };\r |
83bd0b76 |
18 | \r |
45f2f245 |
19 | void (*PicoCartUnloadHook)(void);\r |
20 | void (*PicoCartMemSetup)(void);\r |
e807ac75 |
21 | \r |
a9b3ffd3 |
22 | void (*PicoCartLoadProgressCB)(int percent) = NULL;\r |
b2451ac6 |
23 | void (*PicoCDLoadProgressCB)(const char *fname, int percent) = NULL; // handled in Pico/cd/cd_file.c\r |
a9b3ffd3 |
24 | \r |
ae87bffa |
25 | static void PicoCartDetect(const char *carthw_cfg);\r |
d6114368 |
26 | \r |
71de3cd9 |
27 | /* cso struct */\r |
28 | typedef struct _cso_struct\r |
29 | {\r |
30 | unsigned char in_buff[2*2048];\r |
31 | unsigned char out_buff[2048];\r |
32 | struct {\r |
33 | char magic[4];\r |
34 | unsigned int unused;\r |
35 | unsigned int total_bytes;\r |
36 | unsigned int total_bytes_high; // ignored here\r |
37 | unsigned int block_size; // 10h\r |
38 | unsigned char ver;\r |
39 | unsigned char align;\r |
40 | unsigned char reserved[2];\r |
41 | } header;\r |
42 | unsigned int fpos_in; // input file read pointer\r |
43 | unsigned int fpos_out; // pos in virtual decompressed file\r |
44 | int block_in_buff; // block which we have read in in_buff\r |
45 | int pad;\r |
46 | int index[0];\r |
47 | }\r |
48 | cso_struct;\r |
49 | \r |
50 | static int uncompress2(void *dest, int destLen, void *source, int sourceLen)\r |
51 | {\r |
52 | z_stream stream;\r |
53 | int err;\r |
54 | \r |
55 | stream.next_in = (Bytef*)source;\r |
56 | stream.avail_in = (uInt)sourceLen;\r |
57 | stream.next_out = dest;\r |
58 | stream.avail_out = (uInt)destLen;\r |
59 | \r |
60 | stream.zalloc = NULL;\r |
61 | stream.zfree = NULL;\r |
62 | \r |
63 | err = inflateInit2(&stream, -15);\r |
64 | if (err != Z_OK) return err;\r |
65 | \r |
66 | err = inflate(&stream, Z_FINISH);\r |
67 | if (err != Z_STREAM_END) {\r |
68 | inflateEnd(&stream);\r |
69 | return err;\r |
70 | }\r |
71 | //*destLen = stream.total_out;\r |
72 | \r |
73 | return inflateEnd(&stream);\r |
74 | }\r |
83bd0b76 |
75 | \r |
87b0845f |
76 | static const char *get_ext(const char *path)\r |
77 | {\r |
78 | const char *ext;\r |
79 | if (strlen(path) < 4)\r |
80 | return ""; // no ext\r |
81 | \r |
82 | // allow 2 or 3 char extensions for now\r |
83 | ext = path + strlen(path) - 2;\r |
84 | if (ext[-1] != '.') ext--;\r |
85 | if (ext[-1] != '.')\r |
86 | return "";\r |
87 | return ext;\r |
88 | }\r |
89 | \r |
83bd0b76 |
90 | pm_file *pm_open(const char *path)\r |
91 | {\r |
92 | pm_file *file = NULL;\r |
93 | const char *ext;\r |
94 | FILE *f;\r |
95 | \r |
87b0845f |
96 | if (path == NULL)\r |
97 | return NULL;\r |
83bd0b76 |
98 | \r |
87b0845f |
99 | ext = get_ext(path);\r |
100 | if (strcasecmp(ext, "zip") == 0)\r |
83bd0b76 |
101 | {\r |
102 | struct zipent *zipentry;\r |
103 | gzFile gzf = NULL;\r |
104 | ZIP *zipfile;\r |
105 | int i;\r |
106 | \r |
107 | zipfile = openzip(path);\r |
83bd0b76 |
108 | if (zipfile != NULL)\r |
109 | {\r |
110 | /* search for suitable file (right extension or large enough file) */\r |
111 | while ((zipentry = readzip(zipfile)) != NULL)\r |
112 | {\r |
87b0845f |
113 | ext = get_ext(zipentry->name);\r |
83bd0b76 |
114 | \r |
87b0845f |
115 | if (zipentry->uncompressed_size >= 32*1024)\r |
116 | goto found_rom_zip;\r |
3e49ffd0 |
117 | \r |
83bd0b76 |
118 | for (i = 0; i < sizeof(rom_exts)/sizeof(rom_exts[0]); i++)\r |
87b0845f |
119 | if (strcasecmp(ext, rom_exts[i]) == 0)\r |
120 | goto found_rom_zip;\r |
83bd0b76 |
121 | }\r |
122 | \r |
123 | /* zipfile given, but nothing found suitable for us inside */\r |
124 | goto zip_failed;\r |
125 | \r |
126 | found_rom_zip:\r |
127 | /* try to convert to gzip stream, so we could use standard gzio functions from zlib */\r |
128 | gzf = zip2gz(zipfile, zipentry);\r |
129 | if (gzf == NULL) goto zip_failed;\r |
130 | \r |
87b0845f |
131 | file = calloc(1, sizeof(*file));\r |
83bd0b76 |
132 | if (file == NULL) goto zip_failed;\r |
133 | file->file = zipfile;\r |
134 | file->param = gzf;\r |
135 | file->size = zipentry->uncompressed_size;\r |
136 | file->type = PMT_ZIP;\r |
87b0845f |
137 | strncpy(file->ext, ext, sizeof(file->ext) - 1);\r |
83bd0b76 |
138 | return file;\r |
139 | \r |
140 | zip_failed:\r |
141 | if (gzf) {\r |
142 | gzclose(gzf);\r |
143 | zipfile->fp = NULL; // gzclose() closed it\r |
144 | }\r |
145 | closezip(zipfile);\r |
146 | return NULL;\r |
147 | }\r |
148 | }\r |
87b0845f |
149 | else if (strcasecmp(ext, "cso") == 0)\r |
71de3cd9 |
150 | {\r |
151 | cso_struct *cso = NULL, *tmp = NULL;\r |
152 | int size;\r |
153 | f = fopen(path, "rb");\r |
154 | if (f == NULL)\r |
155 | goto cso_failed;\r |
156 | \r |
f8af9634 |
157 | #ifndef __EPOC32__\r |
2d2247c2 |
158 | /* we use our own buffering */\r |
159 | setvbuf(f, NULL, _IONBF, 0);\r |
f8af9634 |
160 | #endif\r |
2d2247c2 |
161 | \r |
71de3cd9 |
162 | cso = malloc(sizeof(*cso));\r |
163 | if (cso == NULL)\r |
164 | goto cso_failed;\r |
165 | \r |
166 | if (fread(&cso->header, 1, sizeof(cso->header), f) != sizeof(cso->header))\r |
167 | goto cso_failed;\r |
168 | \r |
169 | if (strncmp(cso->header.magic, "CISO", 4) != 0) {\r |
170 | elprintf(EL_STATUS, "cso: bad header");\r |
171 | goto cso_failed;\r |
172 | }\r |
173 | \r |
174 | if (cso->header.block_size != 2048) {\r |
175 | elprintf(EL_STATUS, "cso: bad block size (%u)", cso->header.block_size);\r |
176 | goto cso_failed;\r |
177 | }\r |
178 | \r |
179 | size = ((cso->header.total_bytes >> 11) + 1)*4 + sizeof(*cso);\r |
180 | tmp = realloc(cso, size);\r |
181 | if (tmp == NULL)\r |
182 | goto cso_failed;\r |
183 | cso = tmp;\r |
184 | elprintf(EL_STATUS, "allocated %i bytes for CSO struct", size);\r |
185 | \r |
186 | size -= sizeof(*cso); // index size\r |
187 | if (fread(cso->index, 1, size, f) != size) {\r |
188 | elprintf(EL_STATUS, "cso: premature EOF");\r |
189 | goto cso_failed;\r |
190 | }\r |
191 | \r |
192 | // all ok\r |
193 | cso->fpos_in = ftell(f);\r |
194 | cso->fpos_out = 0;\r |
195 | cso->block_in_buff = -1;\r |
87b0845f |
196 | file = calloc(1, sizeof(*file));\r |
71de3cd9 |
197 | if (file == NULL) goto cso_failed;\r |
198 | file->file = f;\r |
199 | file->param = cso;\r |
200 | file->size = cso->header.total_bytes;\r |
201 | file->type = PMT_CSO;\r |
202 | return file;\r |
203 | \r |
204 | cso_failed:\r |
205 | if (cso != NULL) free(cso);\r |
206 | if (f != NULL) fclose(f);\r |
207 | return NULL;\r |
208 | }\r |
83bd0b76 |
209 | \r |
210 | /* not a zip, treat as uncompressed file */\r |
211 | f = fopen(path, "rb");\r |
212 | if (f == NULL) return NULL;\r |
213 | \r |
87b0845f |
214 | file = calloc(1, sizeof(*file));\r |
83bd0b76 |
215 | if (file == NULL) {\r |
216 | fclose(f);\r |
217 | return NULL;\r |
218 | }\r |
219 | fseek(f, 0, SEEK_END);\r |
220 | file->file = f;\r |
221 | file->param = NULL;\r |
222 | file->size = ftell(f);\r |
223 | file->type = PMT_UNCOMPRESSED;\r |
87b0845f |
224 | strncpy(file->ext, ext, sizeof(file->ext) - 1);\r |
83bd0b76 |
225 | fseek(f, 0, SEEK_SET);\r |
d6114368 |
226 | \r |
f8af9634 |
227 | #ifndef __EPOC32__ // makes things worse on Symbian\r |
228 | if (file->size > 0x400000)\r |
229 | /* we use our own buffering */\r |
230 | setvbuf(f, NULL, _IONBF, 0);\r |
231 | #endif\r |
232 | \r |
83bd0b76 |
233 | return file;\r |
234 | }\r |
235 | \r |
236 | size_t pm_read(void *ptr, size_t bytes, pm_file *stream)\r |
237 | {\r |
238 | int ret;\r |
239 | \r |
240 | if (stream->type == PMT_UNCOMPRESSED)\r |
241 | {\r |
242 | ret = fread(ptr, 1, bytes, stream->file);\r |
243 | }\r |
244 | else if (stream->type == PMT_ZIP)\r |
245 | {\r |
246 | gzFile gf = stream->param;\r |
247 | int err;\r |
248 | ret = gzread(gf, ptr, bytes);\r |
249 | err = gzerror2(gf);\r |
250 | if (ret > 0 && (err == Z_DATA_ERROR || err == Z_STREAM_END))\r |
251 | /* we must reset stream pointer or else next seek/read fails */\r |
252 | gzrewind(gf);\r |
253 | }\r |
71de3cd9 |
254 | else if (stream->type == PMT_CSO)\r |
255 | {\r |
256 | cso_struct *cso = stream->param;\r |
257 | int read_pos, read_len, out_offs, rret;\r |
258 | int block = cso->fpos_out >> 11;\r |
259 | int index = cso->index[block];\r |
260 | int index_end = cso->index[block+1];\r |
261 | unsigned char *out = ptr, *tmp_dst;\r |
262 | \r |
263 | ret = 0;\r |
264 | while (bytes != 0)\r |
265 | {\r |
266 | out_offs = cso->fpos_out&0x7ff;\r |
267 | if (out_offs == 0 && bytes >= 2048)\r |
268 | tmp_dst = out;\r |
269 | else tmp_dst = cso->out_buff;\r |
270 | \r |
271 | read_pos = (index&0x7fffffff) << cso->header.align;\r |
272 | \r |
273 | if (index < 0) {\r |
274 | if (read_pos != cso->fpos_in)\r |
275 | fseek(stream->file, read_pos, SEEK_SET);\r |
276 | rret = fread(tmp_dst, 1, 2048, stream->file);\r |
277 | cso->fpos_in = read_pos + rret;\r |
278 | if (rret != 2048) break;\r |
279 | } else {\r |
280 | read_len = (((index_end&0x7fffffff) << cso->header.align) - read_pos) & 0xfff;\r |
281 | if (block != cso->block_in_buff)\r |
282 | {\r |
283 | if (read_pos != cso->fpos_in)\r |
ff6b7429 |
284 | fseek(stream->file, read_pos, SEEK_SET);\r |
71de3cd9 |
285 | rret = fread(cso->in_buff, 1, read_len, stream->file);\r |
286 | cso->fpos_in = read_pos + rret;\r |
287 | if (rret != read_len) {\r |
288 | elprintf(EL_STATUS, "cso: read failed @ %08x", read_pos);\r |
289 | break;\r |
290 | }\r |
291 | cso->block_in_buff = block;\r |
292 | }\r |
293 | rret = uncompress2(tmp_dst, 2048, cso->in_buff, read_len);\r |
294 | if (rret != 0) {\r |
295 | elprintf(EL_STATUS, "cso: uncompress failed @ %08x with %i", read_pos, rret);\r |
296 | break;\r |
297 | }\r |
298 | }\r |
299 | \r |
300 | rret = 2048;\r |
301 | if (out_offs != 0 || bytes < 2048) {\r |
302 | //elprintf(EL_STATUS, "cso: unaligned/nonfull @ %08x, offs=%i, len=%u", cso->fpos_out, out_offs, bytes);\r |
303 | if (bytes < rret) rret = bytes;\r |
304 | if (2048 - out_offs < rret) rret = 2048 - out_offs;\r |
305 | memcpy(out, tmp_dst + out_offs, rret);\r |
306 | }\r |
307 | ret += rret;\r |
308 | out += rret;\r |
309 | cso->fpos_out += rret;\r |
310 | bytes -= rret;\r |
311 | block++;\r |
312 | index = index_end;\r |
313 | index_end = cso->index[block+1];\r |
314 | }\r |
315 | }\r |
83bd0b76 |
316 | else\r |
317 | ret = 0;\r |
318 | \r |
319 | return ret;\r |
320 | }\r |
321 | \r |
322 | int pm_seek(pm_file *stream, long offset, int whence)\r |
323 | {\r |
324 | if (stream->type == PMT_UNCOMPRESSED)\r |
325 | {\r |
7336a99a |
326 | fseek(stream->file, offset, whence);\r |
327 | return ftell(stream->file);\r |
83bd0b76 |
328 | }\r |
329 | else if (stream->type == PMT_ZIP)\r |
330 | {\r |
66fdc0f0 |
331 | if (PicoMessage != NULL && offset > 6*1024*1024) {\r |
332 | long pos = gztell((gzFile) stream->param);\r |
333 | if (offset < pos || offset - pos > 6*1024*1024)\r |
334 | PicoMessage("Decompressing data...");\r |
335 | }\r |
83bd0b76 |
336 | return gzseek((gzFile) stream->param, offset, whence);\r |
337 | }\r |
71de3cd9 |
338 | else if (stream->type == PMT_CSO)\r |
339 | {\r |
340 | cso_struct *cso = stream->param;\r |
341 | switch (whence)\r |
342 | {\r |
343 | case SEEK_CUR: cso->fpos_out += offset; break;\r |
344 | case SEEK_SET: cso->fpos_out = offset; break;\r |
345 | case SEEK_END: cso->fpos_out = cso->header.total_bytes - offset; break;\r |
346 | }\r |
347 | return cso->fpos_out;\r |
348 | }\r |
83bd0b76 |
349 | else\r |
350 | return -1;\r |
351 | }\r |
352 | \r |
353 | int pm_close(pm_file *fp)\r |
354 | {\r |
355 | int ret = 0;\r |
356 | \r |
357 | if (fp == NULL) return EOF;\r |
358 | \r |
359 | if (fp->type == PMT_UNCOMPRESSED)\r |
360 | {\r |
361 | fclose(fp->file);\r |
362 | }\r |
363 | else if (fp->type == PMT_ZIP)\r |
364 | {\r |
365 | ZIP *zipfile = fp->file;\r |
366 | gzclose((gzFile) fp->param);\r |
367 | zipfile->fp = NULL; // gzclose() closed it\r |
368 | closezip(zipfile);\r |
369 | }\r |
71de3cd9 |
370 | else if (fp->type == PMT_CSO)\r |
371 | {\r |
372 | free(fp->param);\r |
373 | fclose(fp->file);\r |
374 | }\r |
83bd0b76 |
375 | else\r |
376 | ret = EOF;\r |
377 | \r |
378 | free(fp);\r |
379 | return ret;\r |
380 | }\r |
381 | \r |
83ff19ec |
382 | // byteswap, data needs to be int aligned, src can match dst\r |
383 | void Byteswap(void *dst, const void *src, int len)\r |
cc68a136 |
384 | {\r |
83ff19ec |
385 | const unsigned int *ps = src;\r |
386 | unsigned int *pd = dst;\r |
387 | int i, m;\r |
cc68a136 |
388 | \r |
83ff19ec |
389 | if (len < 2)\r |
390 | return;\r |
cc68a136 |
391 | \r |
83ff19ec |
392 | m = 0x00ff00ff;\r |
393 | for (i = 0; i < len / 4; i++) {\r |
394 | unsigned int t = ps[i];\r |
395 | pd[i] = ((t & m) << 8) | ((t & ~m) >> 8);\r |
cc68a136 |
396 | }\r |
cc68a136 |
397 | }\r |
398 | \r |
399 | // Interleve a 16k block and byteswap\r |
400 | static int InterleveBlock(unsigned char *dest,unsigned char *src)\r |
401 | {\r |
402 | int i=0;\r |
403 | for (i=0;i<0x2000;i++) dest[(i<<1) ]=src[ i]; // Odd\r |
404 | for (i=0;i<0x2000;i++) dest[(i<<1)+1]=src[0x2000+i]; // Even\r |
405 | return 0;\r |
406 | }\r |
407 | \r |
408 | // Decode a SMD file\r |
409 | static int DecodeSmd(unsigned char *data,int len)\r |
410 | {\r |
411 | unsigned char *temp=NULL;\r |
412 | int i=0;\r |
413 | \r |
414 | temp=(unsigned char *)malloc(0x4000);\r |
415 | if (temp==NULL) return 1;\r |
416 | memset(temp,0,0x4000);\r |
417 | \r |
418 | // Interleve each 16k block and shift down by 0x200:\r |
419 | for (i=0; i+0x4200<=len; i+=0x4000)\r |
420 | {\r |
421 | InterleveBlock(temp,data+0x200+i); // Interleve 16k to temporary buffer\r |
422 | memcpy(data+i,temp,0x4000); // Copy back in\r |
423 | }\r |
424 | \r |
425 | free(temp);\r |
426 | return 0;\r |
427 | }\r |
428 | \r |
87b0845f |
429 | static unsigned char *PicoCartAlloc(int filesize, int is_sms)\r |
cc68a136 |
430 | {\r |
cc68a136 |
431 | unsigned char *rom;\r |
432 | \r |
87b0845f |
433 | if (is_sms) {\r |
434 | // make size power of 2 for easier banking handling\r |
435 | int s = 0, tmp = filesize;\r |
436 | while ((tmp >>= 1) != 0)\r |
437 | s++;\r |
438 | if (filesize > (1 << s))\r |
439 | s++;\r |
b081408f |
440 | rom_alloc_size = 1 << s;\r |
87b0845f |
441 | }\r |
442 | else {\r |
b081408f |
443 | // make alloc size at least sizeof(mcd_state),\r |
444 | // in case we want to switch to CD mode\r |
445 | if (filesize < sizeof(mcd_state))\r |
446 | filesize = sizeof(mcd_state);\r |
447 | \r |
87b0845f |
448 | // align to 512K for memhandlers\r |
b081408f |
449 | rom_alloc_size = (filesize + 0x7ffff) & ~0x7ffff;\r |
87b0845f |
450 | }\r |
cc68a136 |
451 | \r |
b081408f |
452 | if (rom_alloc_size - filesize < 4)\r |
453 | rom_alloc_size += 4; // padding for out-of-bound exec protection\r |
cc68a136 |
454 | \r |
455 | // Allocate space for the rom plus padding\r |
b081408f |
456 | // use special address for 32x dynarec\r |
457 | rom = plat_mmap(0x02000000, rom_alloc_size);\r |
cc68a136 |
458 | return rom;\r |
459 | }\r |
460 | \r |
3e49ffd0 |
461 | int PicoCartLoad(pm_file *f,unsigned char **prom,unsigned int *psize,int is_sms)\r |
cc68a136 |
462 | {\r |
87b0845f |
463 | unsigned char *rom;\r |
464 | int size, bytes_read;\r |
cc68a136 |
465 | \r |
87b0845f |
466 | if (f == NULL)\r |
467 | return 1;\r |
468 | \r |
469 | size = f->size;\r |
cc68a136 |
470 | if (size <= 0) return 1;\r |
87b0845f |
471 | size = (size+3)&~3; // Round up to a multiple of 4\r |
cc68a136 |
472 | \r |
473 | // Allocate space for the rom plus padding\r |
87b0845f |
474 | rom = PicoCartAlloc(size, is_sms);\r |
475 | if (rom == NULL) {\r |
c6196c0f |
476 | elprintf(EL_STATUS, "out of memory (wanted %i)", size);\r |
f8af9634 |
477 | return 2;\r |
7336a99a |
478 | }\r |
cc68a136 |
479 | \r |
a9b3ffd3 |
480 | if (PicoCartLoadProgressCB != NULL)\r |
481 | {\r |
482 | // read ROM in blocks, just for fun\r |
483 | int ret;\r |
484 | unsigned char *p = rom;\r |
485 | bytes_read=0;\r |
486 | do\r |
487 | {\r |
488 | int todo = size - bytes_read;\r |
489 | if (todo > 256*1024) todo = 256*1024;\r |
490 | ret = pm_read(p,todo,f);\r |
491 | bytes_read += ret;\r |
492 | p += ret;\r |
493 | PicoCartLoadProgressCB(bytes_read * 100 / size);\r |
494 | }\r |
495 | while (ret > 0);\r |
496 | }\r |
497 | else\r |
498 | bytes_read = pm_read(rom,size,f); // Load up the rom\r |
499 | if (bytes_read <= 0) {\r |
c6196c0f |
500 | elprintf(EL_STATUS, "read failed");\r |
a9b3ffd3 |
501 | free(rom);\r |
f8af9634 |
502 | return 3;\r |
a9b3ffd3 |
503 | }\r |
bf098bc5 |
504 | \r |
3e49ffd0 |
505 | if (!is_sms)\r |
506 | {\r |
507 | // maybe we are loading MegaCD BIOS?\r |
508 | if (!(PicoAHW & PAHW_MCD) && size == 0x20000 && (!strncmp((char *)rom+0x124, "BOOT", 4) ||\r |
509 | !strncmp((char *)rom+0x128, "BOOT", 4))) {\r |
510 | PicoAHW |= PAHW_MCD;\r |
3e49ffd0 |
511 | }\r |
cc68a136 |
512 | \r |
3e49ffd0 |
513 | // Check for SMD:\r |
87b0845f |
514 | if (size >= 0x4200 && (size&0x3fff) == 0x200 &&\r |
3e49ffd0 |
515 | ((rom[0x2280] == 'S' && rom[0x280] == 'E') || (rom[0x280] == 'S' && rom[0x2281] == 'E'))) {\r |
87b0845f |
516 | elprintf(EL_STATUS, "SMD format detected.");\r |
3e49ffd0 |
517 | DecodeSmd(rom,size); size-=0x200; // Decode and byteswap SMD\r |
518 | }\r |
83ff19ec |
519 | else Byteswap(rom, rom, size); // Just byteswap\r |
21395e38 |
520 | }\r |
87b0845f |
521 | else\r |
522 | {\r |
523 | if (size >= 0x4200 && (size&0x3fff) == 0x200) {\r |
524 | elprintf(EL_STATUS, "SMD format detected.");\r |
525 | // at least here it's not interleaved\r |
526 | size -= 0x200;\r |
527 | memmove(rom, rom + 0x200, size);\r |
528 | }\r |
529 | }\r |
cc68a136 |
530 | \r |
87b0845f |
531 | if (prom) *prom = rom;\r |
532 | if (psize) *psize = size;\r |
cc68a136 |
533 | \r |
534 | return 0;\r |
535 | }\r |
536 | \r |
f8ef8ff7 |
537 | // Insert a cartridge:\r |
ae87bffa |
538 | int PicoCartInsert(unsigned char *rom, unsigned int romsize, const char *carthw_cfg)\r |
cc68a136 |
539 | {\r |
540 | // notaz: add a 68k "jump one op back" opcode to the end of ROM.\r |
541 | // This will hang the emu, but will prevent nasty crashes.\r |
542 | // note: 4 bytes are padded to every ROM\r |
d6114368 |
543 | if (rom != NULL)\r |
cc68a136 |
544 | *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped\r |
545 | \r |
cc68a136 |
546 | Pico.rom=rom;\r |
547 | Pico.romsize=romsize;\r |
548 | \r |
d6114368 |
549 | if (SRam.data) {\r |
550 | free(SRam.data);\r |
551 | SRam.data = NULL;\r |
552 | }\r |
553 | \r |
e807ac75 |
554 | if (PicoCartUnloadHook != NULL) {\r |
555 | PicoCartUnloadHook();\r |
556 | PicoCartUnloadHook = NULL;\r |
557 | }\r |
558 | \r |
3e49ffd0 |
559 | PicoAHW &= PAHW_MCD|PAHW_SMS;\r |
602133e1 |
560 | \r |
45f2f245 |
561 | PicoCartMemSetup = NULL;\r |
f8ef8ff7 |
562 | PicoDmaHook = NULL;\r |
563 | PicoResetHook = NULL;\r |
017512f2 |
564 | PicoLineHook = NULL;\r |
fad24893 |
565 | PicoLoadStateHook = NULL;\r |
945c2fdc |
566 | carthw_chunks = NULL;\r |
f8ef8ff7 |
567 | \r |
3e49ffd0 |
568 | if (!(PicoAHW & (PAHW_MCD|PAHW_SMS)))\r |
ae87bffa |
569 | PicoCartDetect(carthw_cfg);\r |
f8ef8ff7 |
570 | \r |
1dceadae |
571 | // setup correct memory map for loaded ROM\r |
9037e45d |
572 | switch (PicoAHW) {\r |
573 | default:\r |
574 | elprintf(EL_STATUS|EL_ANOMALY, "starting in unknown hw configuration: %x", PicoAHW);\r |
575 | case 0:\r |
576 | case PAHW_SVP: PicoMemSetup(); break;\r |
577 | case PAHW_MCD: PicoMemSetupCD(); break;\r |
578 | case PAHW_PICO: PicoMemSetupPico(); break;\r |
3e49ffd0 |
579 | case PAHW_SMS: PicoMemSetupMS(); break;\r |
9037e45d |
580 | }\r |
1dceadae |
581 | \r |
45f2f245 |
582 | if (PicoCartMemSetup != NULL)\r |
583 | PicoCartMemSetup();\r |
584 | \r |
3e49ffd0 |
585 | if (PicoAHW & PAHW_SMS)\r |
586 | PicoPowerMS();\r |
587 | else\r |
588 | PicoPower();\r |
589 | \r |
1cb1584b |
590 | return 0;\r |
cc68a136 |
591 | }\r |
592 | \r |
2aa27095 |
593 | void PicoCartUnload(void)\r |
cc68a136 |
594 | {\r |
3e49ffd0 |
595 | if (PicoCartUnloadHook != NULL) {\r |
596 | PicoCartUnloadHook();\r |
597 | PicoCartUnloadHook = NULL;\r |
598 | }\r |
599 | \r |
5e49c3a8 |
600 | if (PicoAHW & PAHW_32X)\r |
601 | PicoUnload32x();\r |
602 | \r |
a12b1b29 |
603 | if (Pico.rom != NULL) {\r |
053fd9b4 |
604 | SekFinishIdleDet();\r |
b081408f |
605 | plat_munmap(Pico.rom, rom_alloc_size);\r |
606 | Pico.rom = NULL;\r |
a12b1b29 |
607 | }\r |
cc68a136 |
608 | }\r |
609 | \r |
000f5335 |
610 | static unsigned int rom_crc32(void)\r |
611 | {\r |
612 | unsigned int crc;\r |
613 | elprintf(EL_STATUS, "caclulating CRC32..");\r |
614 | \r |
615 | // have to unbyteswap for calculation..\r |
83ff19ec |
616 | Byteswap(Pico.rom, Pico.rom, Pico.romsize);\r |
000f5335 |
617 | crc = crc32(0, Pico.rom, Pico.romsize);\r |
83ff19ec |
618 | Byteswap(Pico.rom, Pico.rom, Pico.romsize);\r |
000f5335 |
619 | return crc;\r |
620 | }\r |
621 | \r |
1f4e9f14 |
622 | static int rom_strcmp(int rom_offset, const char *s1)\r |
1dceadae |
623 | {\r |
1f4e9f14 |
624 | int i, len = strlen(s1);\r |
45f2f245 |
625 | const char *s_rom = (const char *)Pico.rom;\r |
1dceadae |
626 | for (i = 0; i < len; i++)\r |
45f2f245 |
627 | if (s1[i] != s_rom[(i + rom_offset) ^ 1])\r |
1dceadae |
628 | return 1;\r |
629 | return 0;\r |
630 | }\r |
631 | \r |
af37bca8 |
632 | static unsigned int rom_read32(int addr)\r |
633 | {\r |
634 | unsigned short *m = (unsigned short *)(Pico.rom + addr);\r |
635 | return (m[0] << 16) | m[1];\r |
636 | }\r |
637 | \r |
45f2f245 |
638 | static char *sskip(char *s)\r |
639 | {\r |
640 | while (*s && isspace_(*s))\r |
641 | s++;\r |
642 | return s;\r |
643 | }\r |
644 | \r |
645 | static void rstrip(char *s)\r |
646 | {\r |
647 | char *p;\r |
648 | for (p = s + strlen(s) - 1; p >= s; p--)\r |
649 | if (isspace_(*p))\r |
650 | *p = 0;\r |
651 | }\r |
652 | \r |
000f5335 |
653 | static int parse_3_vals(char *p, int *val0, int *val1, int *val2)\r |
654 | {\r |
655 | char *r;\r |
656 | *val0 = strtoul(p, &r, 0);\r |
657 | if (r == p)\r |
658 | goto bad;\r |
659 | p = sskip(r);\r |
660 | if (*p++ != ',')\r |
661 | goto bad;\r |
662 | *val1 = 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 | *val2 = strtoul(p, &r, 0);\r |
669 | if (r == p)\r |
670 | goto bad;\r |
671 | \r |
672 | return 1;\r |
673 | bad:\r |
674 | return 0;\r |
675 | }\r |
676 | \r |
45f2f245 |
677 | static int is_expr(const char *expr, char **pr)\r |
678 | {\r |
679 | int len = strlen(expr);\r |
680 | char *p = *pr;\r |
681 | \r |
682 | if (strncmp(expr, p, len) != 0)\r |
683 | return 0;\r |
684 | p = sskip(p + len);\r |
685 | if (*p != '=')\r |
686 | return 0; // wrong or malformed\r |
687 | \r |
688 | *pr = sskip(p + 1);\r |
689 | return 1;\r |
690 | }\r |
691 | \r |
ae87bffa |
692 | static void parse_carthw(const char *carthw_cfg, int *fill_sram)\r |
45f2f245 |
693 | {\r |
694 | int line = 0, any_checks_passed = 0, skip_sect = 0;\r |
000f5335 |
695 | int tmp, rom_crc = 0;\r |
45f2f245 |
696 | char buff[256], *p, *r;\r |
697 | FILE *f;\r |
698 | \r |
ae87bffa |
699 | f = fopen(carthw_cfg, "r");\r |
45f2f245 |
700 | if (f == NULL) {\r |
ae87bffa |
701 | elprintf(EL_STATUS, "couldn't open carthw.cfg!");\r |
45f2f245 |
702 | return;\r |
703 | }\r |
704 | \r |
705 | while ((p = fgets(buff, sizeof(buff), f)))\r |
706 | {\r |
707 | line++;\r |
708 | p = sskip(p);\r |
709 | if (*p == 0 || *p == '#')\r |
710 | continue;\r |
711 | \r |
712 | if (*p == '[') {\r |
713 | any_checks_passed = 0;\r |
714 | skip_sect = 0;\r |
715 | continue;\r |
716 | }\r |
717 | \r |
718 | if (skip_sect)\r |
719 | continue;\r |
720 | \r |
721 | /* look for checks */\r |
722 | if (is_expr("check_str", &p))\r |
723 | {\r |
724 | int offs;\r |
725 | offs = strtoul(p, &r, 0);\r |
726 | if (offs < 0 || offs > Pico.romsize) {\r |
727 | elprintf(EL_STATUS, "carthw:%d: check_str offs out of range: %d\n", line, offs);\r |
728 | goto bad;\r |
729 | }\r |
730 | p = sskip(r);\r |
731 | if (*p != ',')\r |
732 | goto bad;\r |
733 | p = sskip(p + 1);\r |
734 | if (*p != '"')\r |
735 | goto bad;\r |
736 | p++;\r |
737 | r = strchr(p, '"');\r |
738 | if (r == NULL)\r |
739 | goto bad;\r |
740 | *r = 0;\r |
741 | \r |
742 | if (rom_strcmp(offs, p) == 0)\r |
743 | any_checks_passed = 1;\r |
744 | else\r |
745 | skip_sect = 1;\r |
746 | continue;\r |
747 | }\r |
748 | else if (is_expr("check_size_gt", &p))\r |
749 | {\r |
750 | int size;\r |
751 | size = strtoul(p, &r, 0);\r |
752 | if (r == p || size < 0)\r |
753 | goto bad;\r |
754 | \r |
755 | if (Pico.romsize > size)\r |
756 | any_checks_passed = 1;\r |
757 | else\r |
758 | skip_sect = 1;\r |
759 | continue;\r |
760 | }\r |
761 | else if (is_expr("check_csum", &p))\r |
762 | {\r |
763 | int csum;\r |
764 | csum = strtoul(p, &r, 0);\r |
765 | if (r == p || (csum & 0xffff0000))\r |
766 | goto bad;\r |
767 | \r |
768 | if (csum == (rom_read32(0x18c) & 0xffff))\r |
769 | any_checks_passed = 1;\r |
770 | else\r |
771 | skip_sect = 1;\r |
772 | continue;\r |
773 | }\r |
000f5335 |
774 | else if (is_expr("check_crc32", &p))\r |
775 | {\r |
776 | unsigned int crc;\r |
777 | crc = strtoul(p, &r, 0);\r |
778 | if (r == p)\r |
779 | goto bad;\r |
780 | \r |
781 | if (rom_crc == 0)\r |
782 | rom_crc = rom_crc32();\r |
783 | if (crc == rom_crc)\r |
784 | any_checks_passed = 1;\r |
785 | else\r |
786 | skip_sect = 1;\r |
787 | continue;\r |
788 | }\r |
45f2f245 |
789 | \r |
790 | /* now time for actions */\r |
791 | if (is_expr("hw", &p)) {\r |
792 | if (!any_checks_passed)\r |
793 | goto no_checks;\r |
794 | rstrip(p);\r |
795 | \r |
796 | if (strcmp(p, "svp") == 0)\r |
797 | PicoSVPStartup();\r |
798 | else if (strcmp(p, "pico") == 0)\r |
799 | PicoInitPico();\r |
000f5335 |
800 | else if (strcmp(p, "prot") == 0)\r |
801 | carthw_sprot_startup();\r |
802 | else if (strcmp(p, "ssf2_mapper") == 0)\r |
803 | carthw_ssf2_startup();\r |
45f2f245 |
804 | else if (strcmp(p, "x_in_1_mapper") == 0)\r |
805 | carthw_Xin1_startup();\r |
806 | else if (strcmp(p, "realtec_mapper") == 0)\r |
807 | carthw_realtec_startup();\r |
808 | else if (strcmp(p, "radica_mapper") == 0)\r |
809 | carthw_radica_startup();\r |
000f5335 |
810 | else if (strcmp(p, "prot_lk3") == 0)\r |
811 | carthw_prot_lk3_startup();\r |
45f2f245 |
812 | else {\r |
813 | elprintf(EL_STATUS, "carthw:%d: unsupported mapper: %s", line, p);\r |
814 | skip_sect = 1;\r |
815 | }\r |
816 | continue;\r |
817 | }\r |
818 | if (is_expr("sram_range", &p)) {\r |
819 | int start, end;\r |
820 | \r |
821 | if (!any_checks_passed)\r |
822 | goto no_checks;\r |
823 | rstrip(p);\r |
824 | \r |
825 | start = strtoul(p, &r, 0);\r |
826 | if (r == p)\r |
827 | goto bad;\r |
828 | p = sskip(r);\r |
829 | if (*p != ',')\r |
830 | goto bad;\r |
831 | p = sskip(p + 1);\r |
832 | end = strtoul(p, &r, 0);\r |
833 | if (r == p)\r |
834 | goto bad;\r |
835 | if (((start | end) & 0xff000000) || start > end) {\r |
836 | elprintf(EL_STATUS, "carthw:%d: bad sram_range: %08x - %08x", line, start, end);\r |
837 | goto bad_nomsg;\r |
838 | }\r |
839 | SRam.start = start;\r |
840 | SRam.end = end;\r |
841 | continue;\r |
842 | }\r |
843 | else if (is_expr("prop", &p)) {\r |
844 | if (!any_checks_passed)\r |
845 | goto no_checks;\r |
846 | rstrip(p);\r |
847 | \r |
848 | if (strcmp(p, "no_sram") == 0)\r |
849 | SRam.flags &= ~SRF_ENABLED;\r |
850 | else if (strcmp(p, "no_eeprom") == 0)\r |
851 | SRam.flags &= ~SRF_EEPROM;\r |
852 | else if (strcmp(p, "filled_sram") == 0)\r |
853 | *fill_sram = 1;\r |
854 | else {\r |
855 | elprintf(EL_STATUS, "carthw:%d: unsupported prop: %s", line, p);\r |
856 | goto bad_nomsg;\r |
857 | }\r |
858 | continue;\r |
859 | }\r |
860 | else if (is_expr("eeprom_type", &p)) {\r |
861 | int type;\r |
862 | if (!any_checks_passed)\r |
863 | goto no_checks;\r |
864 | rstrip(p);\r |
865 | \r |
866 | type = strtoul(p, &r, 0);\r |
867 | if (r == p || type < 0)\r |
868 | goto bad;\r |
869 | SRam.eeprom_type = type;\r |
870 | SRam.flags |= SRF_EEPROM;\r |
871 | continue;\r |
872 | }\r |
873 | else if (is_expr("eeprom_lines", &p)) {\r |
874 | int scl, sda_in, sda_out;\r |
875 | if (!any_checks_passed)\r |
876 | goto no_checks;\r |
877 | rstrip(p);\r |
878 | \r |
000f5335 |
879 | if (!parse_3_vals(p, &scl, &sda_in, &sda_out))\r |
45f2f245 |
880 | goto bad;\r |
000f5335 |
881 | if (scl < 0 || scl > 15 || sda_in < 0 || sda_in > 15 ||\r |
882 | sda_out < 0 || sda_out > 15)\r |
45f2f245 |
883 | goto bad;\r |
884 | \r |
885 | SRam.eeprom_bit_cl = scl;\r |
886 | SRam.eeprom_bit_in = sda_in;\r |
887 | SRam.eeprom_bit_out= sda_out;\r |
888 | continue;\r |
889 | }\r |
000f5335 |
890 | else if ((tmp = is_expr("prot_ro_value16", &p)) || is_expr("prot_rw_value16", &p)) {\r |
891 | int addr, mask, val;\r |
892 | if (!any_checks_passed)\r |
893 | goto no_checks;\r |
894 | rstrip(p);\r |
895 | \r |
896 | if (!parse_3_vals(p, &addr, &mask, &val))\r |
897 | goto bad;\r |
898 | \r |
899 | carthw_sprot_new_location(addr, mask, val, tmp ? 1 : 0);\r |
900 | continue;\r |
901 | }\r |
45f2f245 |
902 | \r |
903 | \r |
904 | bad:\r |
905 | elprintf(EL_STATUS, "carthw:%d: unrecognized expression: %s", line, buff);\r |
906 | bad_nomsg:\r |
907 | skip_sect = 1;\r |
908 | continue;\r |
909 | \r |
910 | no_checks:\r |
911 | elprintf(EL_STATUS, "carthw:%d: command without any checks before it: %s", line, buff);\r |
912 | skip_sect = 1;\r |
913 | continue;\r |
914 | }\r |
915 | fclose(f);\r |
916 | }\r |
917 | \r |
a12b1b29 |
918 | /*\r |
919 | * various cart-specific things, which can't be handled by generic code\r |
a12b1b29 |
920 | */\r |
ae87bffa |
921 | static void PicoCartDetect(const char *carthw_cfg)\r |
1dceadae |
922 | {\r |
000f5335 |
923 | int fill_sram = 0;\r |
1dceadae |
924 | \r |
45f2f245 |
925 | memset(&SRam, 0, sizeof(SRam));\r |
1dceadae |
926 | if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')\r |
927 | {\r |
45f2f245 |
928 | SRam.start = rom_read32(0x1B4) & ~0xff000001; // align\r |
929 | SRam.end = (rom_read32(0x1B8) & ~0xff000000) | 1;\r |
1dceadae |
930 | if (Pico.rom[0x1B2] & 0x40)\r |
1dceadae |
931 | // EEPROM\r |
45f2f245 |
932 | SRam.flags |= SRF_EEPROM;\r |
933 | SRam.flags |= SRF_ENABLED;\r |
1dceadae |
934 | }\r |
45f2f245 |
935 | if (SRam.end == 0 || SRam.start > SRam.end)\r |
1dceadae |
936 | {\r |
937 | // some games may have bad headers, like S&K and Sonic3\r |
938 | // note: majority games use 0x200000 as starting address, but there are some which\r |
939 | // use something else (0x300000 by HardBall '95). Luckily they have good headers.\r |
940 | SRam.start = 0x200000;\r |
941 | SRam.end = 0x203FFF;\r |
45f2f245 |
942 | SRam.flags |= SRF_ENABLED;\r |
1dceadae |
943 | }\r |
1dceadae |
944 | \r |
945 | // set EEPROM defaults, in case it gets detected\r |
946 | SRam.eeprom_type = 0; // 7bit (24C01)\r |
1dceadae |
947 | SRam.eeprom_bit_cl = 1;\r |
948 | SRam.eeprom_bit_in = 0;\r |
949 | SRam.eeprom_bit_out= 0;\r |
950 | \r |
ae87bffa |
951 | if (carthw_cfg != NULL)\r |
952 | parse_carthw(carthw_cfg, &fill_sram);\r |
9037e45d |
953 | \r |
45f2f245 |
954 | if (SRam.flags & SRF_ENABLED)\r |
757f8dae |
955 | {\r |
45f2f245 |
956 | if (SRam.flags & SRF_EEPROM)\r |
957 | SRam.size = 0x2000;\r |
958 | else\r |
959 | SRam.size = SRam.end - SRam.start + 1;\r |
757f8dae |
960 | \r |
45f2f245 |
961 | SRam.data = calloc(SRam.size, 1);\r |
962 | if (SRam.data == NULL)\r |
963 | SRam.flags &= ~SRF_ENABLED;\r |
a12b1b29 |
964 | \r |
45f2f245 |
965 | if (SRam.eeprom_type == 1) // 1 == 0 in PD EEPROM code\r |
966 | SRam.eeprom_type = 0;\r |
0b35350d |
967 | }\r |
968 | \r |
45f2f245 |
969 | if ((SRam.flags & SRF_ENABLED) && fill_sram)\r |
757f8dae |
970 | {\r |
45f2f245 |
971 | elprintf(EL_STATUS, "SRAM fill");\r |
972 | memset(SRam.data, 0xff, SRam.size);\r |
757f8dae |
973 | }\r |
1f4e9f14 |
974 | \r |
975 | // Unusual region 'code'\r |
453d2a6e |
976 | if (rom_strcmp(0x1f0, "EUROPE") == 0 || rom_strcmp(0x1f0, "Europe") == 0)\r |
45f2f245 |
977 | *(int *) (Pico.rom + 0x1f0) = 0x20204520;\r |
1dceadae |
978 | }\r |
979 | \r |