2 * libretro core glue for PicoDrive
5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
9 #define _GNU_SOURCE 1 // mremap
20 #include <libkern/OSCacheControl.h>
23 #include <pico/pico_int.h>
24 #include <pico/state.h>
25 #include "common/input_pico.h"
26 #include "common/version.h"
30 #define MAP_ANONYMOUS MAP_ANON
33 static retro_video_refresh_t video_cb;
34 static retro_input_poll_t input_poll_cb;
35 static retro_input_state_t input_state_cb;
36 static retro_environment_t environ_cb;
37 static retro_audio_sample_batch_t audio_batch_cb;
41 #define VOUT_MAX_WIDTH 320
42 #define VOUT_MAX_HEIGHT 240
43 static void *vout_buf;
44 static int vout_width, vout_height;
46 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
48 static void snd_write(int len);
56 /* functions called by the core */
58 void cache_flush_d_inval_i(void *start, void *end)
61 #if defined(__BLACKBERRY_QNX__)
62 msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
63 #elif defined(__MACH__)
64 size_t len = (char *)end - (char *)start;
65 sys_dcache_flush(start, len);
66 sys_icache_invalidate(start, len);
68 __clear_cache(start, end);
74 void* mmap(void *desired_addr,
95 #define MAP_ANONYMOUS 0
97 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
101 void *ret = mmap((void*)addr,size,PROT_READ | PROT_WRITE, flags, -1, 0);
102 if (addr != 0 && ret != (void *)addr) {
103 lprintf("warning: wanted to map @%08lx, got %p\n",
112 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
116 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
117 if (ret == MAP_FAILED) {
118 lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
122 if (addr != 0 && ret != (void *)addr) {
123 lprintf("warning: wanted to map @%08lx, got %p\n",
136 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
139 void *ret = mremap(ptr, oldsize, newsize, 0);
140 if (ret == MAP_FAILED)
146 size_t preserve_size;
148 preserve_size = oldsize;
149 if (preserve_size > newsize)
150 preserve_size = newsize;
151 tmp = malloc(preserve_size);
154 memcpy(tmp, ptr, preserve_size);
156 munmap(ptr, oldsize);
157 ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
158 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
159 if (ret == MAP_FAILED) {
163 memcpy(ret, tmp, preserve_size);
169 void plat_munmap(void *ptr, size_t size)
175 int plat_mem_set_exec(void *ptr, size_t size)
178 int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
180 lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
182 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
184 lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
189 void emu_video_mode_change(int start_line, int line_count, int is_32cols)
191 memset(vout_buf, 0, 320 * 240 * 2);
192 vout_width = is_32cols ? 256 : 320;
193 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
196 void emu_32x_startup(void)
202 void lprintf(const char *fmt, ...)
207 fprintf(emu_log, "PicoDrive: ");
208 vfprintf(emu_log, fmt, list);
215 #include <android/log.h>
217 void lprintf(const char *fmt, ...)
222 __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
229 void retro_set_environment(retro_environment_t cb)
231 static const struct retro_variable vars[] = {
232 //{ "region", "Region; Auto|NTSC|PAL" },
238 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
241 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
242 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
243 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
244 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
245 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
247 unsigned retro_api_version(void)
249 return RETRO_API_VERSION;
252 void retro_set_controller_port_device(unsigned port, unsigned device)
256 void retro_get_system_info(struct retro_system_info *info)
258 memset(info, 0, sizeof(*info));
259 info->library_name = "PicoDrive";
260 info->library_version = VERSION;
261 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
262 info->need_fullpath = true;
265 void retro_get_system_av_info(struct retro_system_av_info *info)
267 memset(info, 0, sizeof(*info));
268 info->timing.fps = Pico.m.pal ? 50 : 60;
269 info->timing.sample_rate = 44100;
270 info->geometry.base_width = 320;
271 info->geometry.base_height = 240;
272 info->geometry.max_width = VOUT_MAX_WIDTH;
273 info->geometry.max_height = VOUT_MAX_HEIGHT;
274 info->geometry.aspect_ratio = 4.0 / 3.0;
278 struct savestate_state {
279 const char *load_buf;
285 size_t state_read(void *p, size_t size, size_t nmemb, void *file)
287 struct savestate_state *state = file;
288 size_t bsize = size * nmemb;
290 if (state->pos + bsize > state->size) {
291 lprintf("savestate error: %u/%u\n",
292 state->pos + bsize, state->size);
293 bsize = state->size - state->pos;
298 memcpy(p, state->load_buf + state->pos, bsize);
303 size_t state_write(void *p, size_t size, size_t nmemb, void *file)
305 struct savestate_state *state = file;
306 size_t bsize = size * nmemb;
308 if (state->pos + bsize > state->size) {
309 lprintf("savestate error: %u/%u\n",
310 state->pos + bsize, state->size);
311 bsize = state->size - state->pos;
316 memcpy(state->save_buf + state->pos, p, bsize);
321 size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
323 struct savestate_state *state = file;
324 size_t bsize = size * nmemb;
330 size_t state_eof(void *file)
332 struct savestate_state *state = file;
334 return state->pos >= state->size;
337 int state_fseek(void *file, long offset, int whence)
339 struct savestate_state *state = file;
346 state->pos += offset;
349 state->pos = state->size + offset;
352 return (int)state->pos;
355 /* savestate sizes vary wildly depending if cd/32x or
356 * carthw is active, so run the whole thing to get size */
357 size_t retro_serialize_size(void)
359 struct savestate_state state = { 0, };
362 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
369 bool retro_serialize(void *data, size_t size)
371 struct savestate_state state = { 0, };
374 state.save_buf = data;
378 ret = PicoStateFP(&state, 1, NULL, state_write,
383 bool retro_unserialize(const void *data, size_t size)
385 struct savestate_state state = { 0, };
388 state.load_buf = data;
392 ret = PicoStateFP(&state, 0, state_read, NULL,
393 state_eof, state_fseek);
398 void retro_cheat_reset(void)
402 void retro_cheat_set(unsigned index, bool enabled, const char *code)
406 /* multidisk support */
407 static bool disk_ejected;
408 static unsigned int disk_current_index;
409 static unsigned int disk_count;
410 static struct disks_state {
414 static bool disk_set_eject_state(bool ejected)
417 disk_ejected = ejected;
421 static bool disk_get_eject_state(void)
426 static unsigned int disk_get_image_index(void)
428 return disk_current_index;
431 static bool disk_set_image_index(unsigned int index)
436 if (index >= sizeof(disks) / sizeof(disks[0]))
439 if (disks[index].fname == NULL) {
440 lprintf("missing disk #%u\n", index);
442 // RetroArch specifies "no disk" with index == count,
443 // so don't fail here..
444 disk_current_index = index;
448 lprintf("switching to disk %u: \"%s\"\n", index,
452 cd_type = PicoCdCheck(disks[index].fname, NULL);
453 if (cd_type != CIT_NOT_CD)
454 ret = Insert_CD(disks[index].fname, cd_type);
456 lprintf("Load failed, invalid CD image?\n");
460 disk_current_index = index;
464 static unsigned int disk_get_num_images(void)
469 static bool disk_replace_image_index(unsigned index,
470 const struct retro_game_info *info)
474 if (index >= sizeof(disks) / sizeof(disks[0]))
477 if (disks[index].fname != NULL)
478 free(disks[index].fname);
479 disks[index].fname = NULL;
482 disks[index].fname = strdup(info->path);
483 if (index == disk_current_index)
484 ret = disk_set_image_index(index);
490 static bool disk_add_image_index(void)
492 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
499 static struct retro_disk_control_callback disk_control = {
500 .set_eject_state = disk_set_eject_state,
501 .get_eject_state = disk_get_eject_state,
502 .get_image_index = disk_get_image_index,
503 .set_image_index = disk_set_image_index,
504 .get_num_images = disk_get_num_images,
505 .replace_image_index = disk_replace_image_index,
506 .add_image_index = disk_add_image_index,
509 static void disk_tray_open(void)
511 lprintf("cd tray open\n");
515 static void disk_tray_close(void)
517 lprintf("cd tray close\n");
522 static const char * const biosfiles_us[] = {
523 "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
525 static const char * const biosfiles_eu[] = {
526 "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
528 static const char * const biosfiles_jp[] = {
529 "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
532 static void make_system_path(char *buf, size_t buf_size,
533 const char *name, const char *ext)
535 const char *dir = NULL;
537 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
538 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
541 snprintf(buf, buf_size, "%s%s", name, ext);
545 static const char *find_bios(int *region, const char *cd_fname)
547 const char * const *files;
548 static char path[256];
552 if (*region == 4) { // US
553 files = biosfiles_us;
554 count = sizeof(biosfiles_us) / sizeof(char *);
555 } else if (*region == 8) { // EU
556 files = biosfiles_eu;
557 count = sizeof(biosfiles_eu) / sizeof(char *);
558 } else if (*region == 1 || *region == 2) {
559 files = biosfiles_jp;
560 count = sizeof(biosfiles_jp) / sizeof(char *);
565 for (i = 0; i < count; i++)
567 make_system_path(path, sizeof(path), files[i], ".bin");
568 f = fopen(path, "rb");
572 make_system_path(path, sizeof(path), files[i], ".zip");
573 f = fopen(path, "rb");
579 lprintf("using bios: %s\n", path);
587 bool retro_load_game(const struct retro_game_info *info)
589 enum media_type_e media_type;
590 static char carthw_path[256];
593 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
594 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
595 lprintf("RGB565 suppot required, sorry\n");
599 if (info == NULL || info->path == NULL) {
600 lprintf("info->path required\n");
604 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
605 if (disks[i].fname != NULL) {
606 free(disks[i].fname);
607 disks[i].fname = NULL;
611 disk_current_index = 0;
613 disks[0].fname = strdup(info->path);
615 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
617 media_type = PicoLoadMedia(info->path, carthw_path,
620 switch (media_type) {
622 lprintf("Failed to detect ROM/CD image type.\n");
625 lprintf("Invalid CD image\n");
627 case PM_BAD_CD_NO_BIOS:
628 lprintf("Missing BIOS\n");
631 lprintf("Load error\n");
639 PicoWriteSound = snd_write;
640 memset(sndBuffer, 0, sizeof(sndBuffer));
647 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
652 void retro_unload_game(void)
656 unsigned retro_get_region(void)
658 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
661 void *retro_get_memory_data(unsigned id)
663 if (id != RETRO_MEMORY_SAVE_RAM)
666 if (PicoAHW & PAHW_MCD)
667 return Pico_mcd->bram;
672 size_t retro_get_memory_size(unsigned id)
674 if (id != RETRO_MEMORY_SAVE_RAM)
677 if (PicoAHW & PAHW_MCD)
684 void retro_reset(void)
689 static const unsigned short retro_pico_map[] = {
690 [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
691 [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
692 [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
693 [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
694 [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
695 [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
696 [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
697 [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
698 [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
699 [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
700 [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
701 [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
703 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
705 static void snd_write(int len)
707 audio_batch_cb(PsndOut, len / 4);
712 bool updated = false;
715 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
716 ; //update_variables(true);
720 PicoPad[0] = PicoPad[1] = 0;
721 for (pad = 0; pad < 2; pad++)
722 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
723 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
724 PicoPad[pad] |= retro_pico_map[i];
728 video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
731 void retro_init(void)
736 emu_log = fopen("/User/Documents/PicoDrive.log", "w");
738 emu_log = fopen("PicoDrive.log", "w");
744 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
746 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
748 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
749 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
750 | POPT_EN_32X|POPT_EN_PWM
751 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
753 PicoOpt |= POPT_EN_SVP_DRC;
756 PicoAutoRgnOrder = 0x184; // US, EU, JP
761 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
764 PicoDrawSetOutFormat(PDF_RGB555, 0);
765 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
767 //PicoMessage = plat_status_msg_busy_next;
768 PicoMCDopenTray = disk_tray_open;
769 PicoMCDcloseTray = disk_tray_close;
772 void retro_deinit(void)