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
16 #include <libkern/OSCacheControl.h>
19 #include <pico/pico_int.h>
20 #include <pico/state.h>
21 #include "common/input_pico.h"
22 #include "common/version.h"
26 #define MAP_ANONYMOUS MAP_ANON
29 static retro_video_refresh_t video_cb;
30 static retro_input_poll_t input_poll_cb;
31 static retro_input_state_t input_state_cb;
32 static retro_environment_t environ_cb;
33 static retro_audio_sample_batch_t audio_batch_cb;
37 #define VOUT_MAX_WIDTH 320
38 #define VOUT_MAX_HEIGHT 240
39 static void *vout_buf;
40 static int vout_width, vout_height;
42 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
44 static void snd_write(int len);
52 /* functions called by the core */
54 void cache_flush_d_inval_i(void *start, void *end)
57 #if defined(__BLACKBERRY_QNX__)
58 msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
59 #elif defined(__MACH__)
60 size_t len = (char *)end - (char *)start;
61 sys_dcache_flush(start, len);
62 sys_icache_invalidate(start, len);
64 __clear_cache(start, end);
69 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
71 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
75 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
76 if (ret == MAP_FAILED) {
77 lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
81 if (addr != 0 && ret != (void *)addr) {
82 lprintf("warning: wanted to map @%08lx, got %p\n",
94 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
97 void *ret = mremap(ptr, oldsize, newsize, 0);
98 if (ret == MAP_FAILED)
104 size_t preserve_size;
106 preserve_size = oldsize;
107 if (preserve_size > newsize)
108 preserve_size = newsize;
109 tmp = malloc(preserve_size);
112 memcpy(tmp, ptr, preserve_size);
114 munmap(ptr, oldsize);
115 ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
116 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
117 if (ret == MAP_FAILED) {
121 memcpy(ret, tmp, preserve_size);
127 void plat_munmap(void *ptr, size_t size)
133 int plat_mem_set_exec(void *ptr, size_t size)
135 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
137 lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
142 void emu_video_mode_change(int start_line, int line_count, int is_32cols)
144 memset(vout_buf, 0, 320 * 240 * 2);
145 vout_width = is_32cols ? 256 : 320;
146 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
149 void emu_32x_startup(void)
155 void lprintf(const char *fmt, ...)
160 fprintf(emu_log, "PicoDrive: ");
161 vfprintf(emu_log, fmt, list);
168 #include <android/log.h>
170 void lprintf(const char *fmt, ...)
175 __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
182 void retro_set_environment(retro_environment_t cb)
184 static const struct retro_variable vars[] = {
185 //{ "region", "Region; Auto|NTSC|PAL" },
191 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
194 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
195 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
196 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
197 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
198 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
200 unsigned retro_api_version(void)
202 return RETRO_API_VERSION;
205 void retro_set_controller_port_device(unsigned port, unsigned device)
209 void retro_get_system_info(struct retro_system_info *info)
211 memset(info, 0, sizeof(*info));
212 info->library_name = "PicoDrive";
213 info->library_version = VERSION;
214 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
215 info->need_fullpath = true;
218 void retro_get_system_av_info(struct retro_system_av_info *info)
220 memset(info, 0, sizeof(*info));
221 info->timing.fps = Pico.m.pal ? 50 : 60;
222 info->timing.sample_rate = 44100;
223 info->geometry.base_width = 320;
224 info->geometry.base_height = 240;
225 info->geometry.max_width = VOUT_MAX_WIDTH;
226 info->geometry.max_height = VOUT_MAX_HEIGHT;
227 info->geometry.aspect_ratio = 4.0 / 3.0;
231 struct savestate_state {
232 const char *load_buf;
238 size_t state_read(void *p, size_t size, size_t nmemb, void *file)
240 struct savestate_state *state = file;
241 size_t bsize = size * nmemb;
243 if (state->pos + bsize > state->size) {
244 lprintf("savestate error: %u/%u\n",
245 state->pos + bsize, state->size);
246 bsize = state->size - state->pos;
251 memcpy(p, state->load_buf + state->pos, bsize);
256 size_t state_write(void *p, size_t size, size_t nmemb, void *file)
258 struct savestate_state *state = file;
259 size_t bsize = size * nmemb;
261 if (state->pos + bsize > state->size) {
262 lprintf("savestate error: %u/%u\n",
263 state->pos + bsize, state->size);
264 bsize = state->size - state->pos;
269 memcpy(state->save_buf + state->pos, p, bsize);
274 size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
276 struct savestate_state *state = file;
277 size_t bsize = size * nmemb;
283 size_t state_eof(void *file)
285 struct savestate_state *state = file;
287 return state->pos >= state->size;
290 int state_fseek(void *file, long offset, int whence)
292 struct savestate_state *state = file;
299 state->pos += offset;
302 state->pos = state->size + offset;
305 return (int)state->pos;
308 /* savestate sizes vary wildly depending if cd/32x or
309 * carthw is active, so run the whole thing to get size */
310 size_t retro_serialize_size(void)
312 struct savestate_state state = { 0, };
315 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
322 bool retro_serialize(void *data, size_t size)
324 struct savestate_state state = { 0, };
327 state.save_buf = data;
331 ret = PicoStateFP(&state, 1, NULL, state_write,
336 bool retro_unserialize(const void *data, size_t size)
338 struct savestate_state state = { 0, };
341 state.load_buf = data;
345 ret = PicoStateFP(&state, 0, state_read, NULL,
346 state_eof, state_fseek);
351 void retro_cheat_reset(void)
355 void retro_cheat_set(unsigned index, bool enabled, const char *code)
359 /* multidisk support */
360 static bool disk_ejected;
361 static unsigned int disk_current_index;
362 static unsigned int disk_count;
363 static struct disks_state {
367 static bool disk_set_eject_state(bool ejected)
370 disk_ejected = ejected;
374 static bool disk_get_eject_state(void)
379 static unsigned int disk_get_image_index(void)
381 return disk_current_index;
384 static bool disk_set_image_index(unsigned int index)
389 if (index >= sizeof(disks) / sizeof(disks[0]))
392 if (disks[index].fname == NULL) {
393 lprintf("missing disk #%u\n", index);
395 // RetroArch specifies "no disk" with index == count,
396 // so don't fail here..
397 disk_current_index = index;
401 lprintf("switching to disk %u: \"%s\"\n", index,
405 cd_type = PicoCdCheck(disks[index].fname, NULL);
406 if (cd_type != CIT_NOT_CD)
407 ret = Insert_CD(disks[index].fname, cd_type);
409 lprintf("Load failed, invalid CD image?\n");
413 disk_current_index = index;
417 static unsigned int disk_get_num_images(void)
422 static bool disk_replace_image_index(unsigned index,
423 const struct retro_game_info *info)
427 if (index >= sizeof(disks) / sizeof(disks[0]))
430 if (disks[index].fname != NULL)
431 free(disks[index].fname);
432 disks[index].fname = NULL;
435 disks[index].fname = strdup(info->path);
436 if (index == disk_current_index)
437 ret = disk_set_image_index(index);
443 static bool disk_add_image_index(void)
445 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
452 static struct retro_disk_control_callback disk_control = {
453 .set_eject_state = disk_set_eject_state,
454 .get_eject_state = disk_get_eject_state,
455 .get_image_index = disk_get_image_index,
456 .set_image_index = disk_set_image_index,
457 .get_num_images = disk_get_num_images,
458 .replace_image_index = disk_replace_image_index,
459 .add_image_index = disk_add_image_index,
462 static void disk_tray_open(void)
464 lprintf("cd tray open\n");
468 static void disk_tray_close(void)
470 lprintf("cd tray close\n");
475 static const char * const biosfiles_us[] = {
476 "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
478 static const char * const biosfiles_eu[] = {
479 "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
481 static const char * const biosfiles_jp[] = {
482 "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
485 static void make_system_path(char *buf, size_t buf_size,
486 const char *name, const char *ext)
488 const char *dir = NULL;
490 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
491 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
494 snprintf(buf, buf_size, "%s%s", name, ext);
498 static const char *find_bios(int *region, const char *cd_fname)
500 const char * const *files;
501 static char path[256];
505 if (*region == 4) { // US
506 files = biosfiles_us;
507 count = sizeof(biosfiles_us) / sizeof(char *);
508 } else if (*region == 8) { // EU
509 files = biosfiles_eu;
510 count = sizeof(biosfiles_eu) / sizeof(char *);
511 } else if (*region == 1 || *region == 2) {
512 files = biosfiles_jp;
513 count = sizeof(biosfiles_jp) / sizeof(char *);
518 for (i = 0; i < count; i++)
520 make_system_path(path, sizeof(path), files[i], ".bin");
521 f = fopen(path, "rb");
525 make_system_path(path, sizeof(path), files[i], ".zip");
526 f = fopen(path, "rb");
532 lprintf("using bios: %s\n", path);
540 bool retro_load_game(const struct retro_game_info *info)
542 enum media_type_e media_type;
543 static char carthw_path[256];
546 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
547 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
548 lprintf("RGB565 suppot required, sorry\n");
552 if (info == NULL || info->path == NULL) {
553 lprintf("info->path required\n");
557 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
558 if (disks[i].fname != NULL) {
559 free(disks[i].fname);
560 disks[i].fname = NULL;
564 disk_current_index = 0;
566 disks[0].fname = strdup(info->path);
568 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
570 media_type = PicoLoadMedia(info->path, carthw_path,
573 switch (media_type) {
575 lprintf("Failed to detect ROM/CD image type.\n");
578 lprintf("Invalid CD image\n");
580 case PM_BAD_CD_NO_BIOS:
581 lprintf("Missing BIOS\n");
584 lprintf("Load error\n");
592 PicoWriteSound = snd_write;
593 memset(sndBuffer, 0, sizeof(sndBuffer));
600 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
605 void retro_unload_game(void)
609 unsigned retro_get_region(void)
611 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
614 void *retro_get_memory_data(unsigned id)
616 if (id != RETRO_MEMORY_SAVE_RAM)
619 if (PicoAHW & PAHW_MCD)
620 return Pico_mcd->bram;
625 size_t retro_get_memory_size(unsigned id)
627 if (id != RETRO_MEMORY_SAVE_RAM)
630 if (PicoAHW & PAHW_MCD)
637 void retro_reset(void)
642 static const unsigned short retro_pico_map[] = {
643 [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
644 [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
645 [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
646 [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
647 [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
648 [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
649 [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
650 [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
651 [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
652 [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
653 [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
654 [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
656 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
658 static void snd_write(int len)
660 audio_batch_cb(PsndOut, len / 4);
665 bool updated = false;
668 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
669 ; //update_variables(true);
673 PicoPad[0] = PicoPad[1] = 0;
674 for (pad = 0; pad < 2; pad++)
675 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
676 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
677 PicoPad[pad] |= retro_pico_map[i];
681 video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
684 void retro_init(void)
689 emu_log = fopen("/User/Documents/PicoDrive.log", "w");
691 emu_log = fopen("PicoDrive.log", "w");
697 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
699 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
701 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
702 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
703 | POPT_EN_32X|POPT_EN_PWM
704 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
706 PicoOpt |= POPT_EN_SVP_DRC;
709 PicoAutoRgnOrder = 0x184; // US, EU, JP
714 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
717 PicoDrawSetOutFormat(PDF_RGB555, 0);
718 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
720 //PicoMessage = plat_status_msg_busy_next;
721 PicoMCDopenTray = disk_tray_open;
722 PicoMCDcloseTray = disk_tray_close;
725 void retro_deinit(void)