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" },
186 { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
187 { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
189 { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
196 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
199 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
200 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
201 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
202 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
203 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
205 unsigned retro_api_version(void)
207 return RETRO_API_VERSION;
210 void retro_set_controller_port_device(unsigned port, unsigned device)
214 void retro_get_system_info(struct retro_system_info *info)
216 memset(info, 0, sizeof(*info));
217 info->library_name = "PicoDrive";
218 info->library_version = VERSION;
219 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
220 info->need_fullpath = true;
223 void retro_get_system_av_info(struct retro_system_av_info *info)
225 memset(info, 0, sizeof(*info));
226 info->timing.fps = Pico.m.pal ? 50 : 60;
227 info->timing.sample_rate = 44100;
228 info->geometry.base_width = 320;
229 info->geometry.base_height = 240;
230 info->geometry.max_width = VOUT_MAX_WIDTH;
231 info->geometry.max_height = VOUT_MAX_HEIGHT;
232 info->geometry.aspect_ratio = 4.0 / 3.0;
236 struct savestate_state {
237 const char *load_buf;
243 size_t state_read(void *p, size_t size, size_t nmemb, void *file)
245 struct savestate_state *state = file;
246 size_t bsize = size * nmemb;
248 if (state->pos + bsize > state->size) {
249 lprintf("savestate error: %u/%u\n",
250 state->pos + bsize, state->size);
251 bsize = state->size - state->pos;
256 memcpy(p, state->load_buf + state->pos, bsize);
261 size_t state_write(void *p, size_t size, size_t nmemb, void *file)
263 struct savestate_state *state = file;
264 size_t bsize = size * nmemb;
266 if (state->pos + bsize > state->size) {
267 lprintf("savestate error: %u/%u\n",
268 state->pos + bsize, state->size);
269 bsize = state->size - state->pos;
274 memcpy(state->save_buf + state->pos, p, bsize);
279 size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
281 struct savestate_state *state = file;
282 size_t bsize = size * nmemb;
288 size_t state_eof(void *file)
290 struct savestate_state *state = file;
292 return state->pos >= state->size;
295 int state_fseek(void *file, long offset, int whence)
297 struct savestate_state *state = file;
304 state->pos += offset;
307 state->pos = state->size + offset;
310 return (int)state->pos;
313 /* savestate sizes vary wildly depending if cd/32x or
314 * carthw is active, so run the whole thing to get size */
315 size_t retro_serialize_size(void)
317 struct savestate_state state = { 0, };
320 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
327 bool retro_serialize(void *data, size_t size)
329 struct savestate_state state = { 0, };
332 state.save_buf = data;
336 ret = PicoStateFP(&state, 1, NULL, state_write,
341 bool retro_unserialize(const void *data, size_t size)
343 struct savestate_state state = { 0, };
346 state.load_buf = data;
350 ret = PicoStateFP(&state, 0, state_read, NULL,
351 state_eof, state_fseek);
356 void retro_cheat_reset(void)
360 void retro_cheat_set(unsigned index, bool enabled, const char *code)
364 /* multidisk support */
365 static bool disk_ejected;
366 static unsigned int disk_current_index;
367 static unsigned int disk_count;
368 static struct disks_state {
372 static bool disk_set_eject_state(bool ejected)
375 disk_ejected = ejected;
379 static bool disk_get_eject_state(void)
384 static unsigned int disk_get_image_index(void)
386 return disk_current_index;
389 static bool disk_set_image_index(unsigned int index)
394 if (index >= sizeof(disks) / sizeof(disks[0]))
397 if (disks[index].fname == NULL) {
398 lprintf("missing disk #%u\n", index);
400 // RetroArch specifies "no disk" with index == count,
401 // so don't fail here..
402 disk_current_index = index;
406 lprintf("switching to disk %u: \"%s\"\n", index,
410 cd_type = PicoCdCheck(disks[index].fname, NULL);
411 if (cd_type != CIT_NOT_CD)
412 ret = Insert_CD(disks[index].fname, cd_type);
414 lprintf("Load failed, invalid CD image?\n");
418 disk_current_index = index;
422 static unsigned int disk_get_num_images(void)
427 static bool disk_replace_image_index(unsigned index,
428 const struct retro_game_info *info)
432 if (index >= sizeof(disks) / sizeof(disks[0]))
435 if (disks[index].fname != NULL)
436 free(disks[index].fname);
437 disks[index].fname = NULL;
440 disks[index].fname = strdup(info->path);
441 if (index == disk_current_index)
442 ret = disk_set_image_index(index);
448 static bool disk_add_image_index(void)
450 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
457 static struct retro_disk_control_callback disk_control = {
458 .set_eject_state = disk_set_eject_state,
459 .get_eject_state = disk_get_eject_state,
460 .get_image_index = disk_get_image_index,
461 .set_image_index = disk_set_image_index,
462 .get_num_images = disk_get_num_images,
463 .replace_image_index = disk_replace_image_index,
464 .add_image_index = disk_add_image_index,
467 static void disk_tray_open(void)
469 lprintf("cd tray open\n");
473 static void disk_tray_close(void)
475 lprintf("cd tray close\n");
480 static const char * const biosfiles_us[] = {
481 "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
483 static const char * const biosfiles_eu[] = {
484 "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
486 static const char * const biosfiles_jp[] = {
487 "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
490 static void make_system_path(char *buf, size_t buf_size,
491 const char *name, const char *ext)
493 const char *dir = NULL;
495 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
496 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
499 snprintf(buf, buf_size, "%s%s", name, ext);
503 static const char *find_bios(int *region, const char *cd_fname)
505 const char * const *files;
506 static char path[256];
510 if (*region == 4) { // US
511 files = biosfiles_us;
512 count = sizeof(biosfiles_us) / sizeof(char *);
513 } else if (*region == 8) { // EU
514 files = biosfiles_eu;
515 count = sizeof(biosfiles_eu) / sizeof(char *);
516 } else if (*region == 1 || *region == 2) {
517 files = biosfiles_jp;
518 count = sizeof(biosfiles_jp) / sizeof(char *);
523 for (i = 0; i < count; i++)
525 make_system_path(path, sizeof(path), files[i], ".bin");
526 f = fopen(path, "rb");
530 make_system_path(path, sizeof(path), files[i], ".zip");
531 f = fopen(path, "rb");
537 lprintf("using bios: %s\n", path);
545 bool retro_load_game(const struct retro_game_info *info)
547 enum media_type_e media_type;
548 static char carthw_path[256];
551 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
552 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
553 lprintf("RGB565 support required, sorry\n");
557 if (info == NULL || info->path == NULL) {
558 lprintf("info->path required\n");
562 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
563 if (disks[i].fname != NULL) {
564 free(disks[i].fname);
565 disks[i].fname = NULL;
569 disk_current_index = 0;
571 disks[0].fname = strdup(info->path);
573 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
575 media_type = PicoLoadMedia(info->path, carthw_path,
578 switch (media_type) {
580 lprintf("Failed to detect ROM/CD image type.\n");
583 lprintf("Invalid CD image\n");
585 case PM_BAD_CD_NO_BIOS:
586 lprintf("Missing BIOS\n");
589 lprintf("Load error\n");
597 PicoWriteSound = snd_write;
598 memset(sndBuffer, 0, sizeof(sndBuffer));
605 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
610 void retro_unload_game(void)
614 unsigned retro_get_region(void)
616 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
619 void *retro_get_memory_data(unsigned id)
621 if (id != RETRO_MEMORY_SAVE_RAM)
624 if (PicoAHW & PAHW_MCD)
625 return Pico_mcd->bram;
630 size_t retro_get_memory_size(unsigned id)
632 if (id != RETRO_MEMORY_SAVE_RAM)
635 if (PicoAHW & PAHW_MCD)
642 void retro_reset(void)
647 static const unsigned short retro_pico_map[] = {
648 [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
649 [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
650 [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
651 [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
652 [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
653 [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
654 [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
655 [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
656 [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
657 [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
658 [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
659 [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
661 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
663 static void snd_write(int len)
665 audio_batch_cb(PsndOut, len / 4);
668 static enum input_device input_name_to_val(const char *name)
670 if (strcmp(name, "3 button pad") == 0)
671 return PICO_INPUT_PAD_3BTN;
672 if (strcmp(name, "6 button pad") == 0)
673 return PICO_INPUT_PAD_6BTN;
674 if (strcmp(name, "None") == 0)
675 return PICO_INPUT_NOTHING;
677 lprintf("invalid picodrive_input: '%s'\n", name);
678 return PICO_INPUT_PAD_3BTN;
681 static void update_variables(void)
683 struct retro_variable var;
686 var.key = "picodrive_input1";
687 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
688 PicoSetInputDevice(0, input_name_to_val(var.value));
691 var.key = "picodrive_input2";
692 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
693 PicoSetInputDevice(1, input_name_to_val(var.value));
697 var.key = "picodrive_drc";
698 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
699 if (strcmp(var.value, "enabled") == 0)
700 PicoOpt |= POPT_EN_DRC;
702 PicoOpt &= ~POPT_EN_DRC;
709 bool updated = false;
712 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
717 PicoPad[0] = PicoPad[1] = 0;
718 for (pad = 0; pad < 2; pad++)
719 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
720 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
721 PicoPad[pad] |= retro_pico_map[i];
725 video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
728 void retro_init(void)
733 emu_log = fopen("/User/Documents/PicoDrive.log", "w");
735 emu_log = fopen("PicoDrive.log", "w");
741 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
743 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
745 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
746 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
747 | POPT_EN_32X|POPT_EN_PWM
748 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
750 PicoOpt |= POPT_EN_SVP_DRC;
753 PicoAutoRgnOrder = 0x184; // US, EU, JP
758 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
761 PicoDrawSetOutFormat(PDF_RGB555, 0);
762 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
764 //PicoMessage = plat_status_msg_busy_next;
765 PicoMCDopenTray = disk_tray_open;
766 PicoMCDcloseTray = disk_tray_close;
771 void retro_deinit(void)