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 "common/input_pico.h"
21 #include "common/version.h"
25 #define MAP_ANONYMOUS MAP_ANON
28 static retro_video_refresh_t video_cb;
29 static retro_input_poll_t input_poll_cb;
30 static retro_input_state_t input_state_cb;
31 static retro_environment_t environ_cb;
32 static retro_audio_sample_batch_t audio_batch_cb;
36 #define VOUT_MAX_WIDTH 320
37 #define VOUT_MAX_HEIGHT 240
38 static void *vout_buf;
39 static int vout_width, vout_height;
41 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
43 static void snd_write(int len);
51 /* functions called by the core */
53 void cache_flush_d_inval_i(void *start, void *end)
56 #if defined(__BLACKBERRY_QNX__)
57 msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
58 #elif defined(__MACH__)
59 size_t len = (char *)end - (char *)start;
60 sys_dcache_flush(start, len);
61 sys_icache_invalidate(start, len);
63 __clear_cache(start, end);
68 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
70 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
74 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
75 if (ret == MAP_FAILED) {
76 lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
80 if (addr != 0 && ret != (void *)addr) {
81 lprintf("warning: wanted to map @%08lx, got %p\n",
93 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
96 void *ret = mremap(ptr, oldsize, newsize, 0);
97 if (ret == MAP_FAILED)
103 size_t preserve_size;
105 preserve_size = oldsize;
106 if (preserve_size > newsize)
107 preserve_size = newsize;
108 tmp = malloc(preserve_size);
111 memcpy(tmp, ptr, preserve_size);
113 munmap(ptr, oldsize);
114 ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
115 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
116 if (ret == MAP_FAILED) {
120 memcpy(ret, tmp, preserve_size);
126 void plat_munmap(void *ptr, size_t size)
132 int plat_mem_set_exec(void *ptr, size_t size)
134 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
136 lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
141 void emu_video_mode_change(int start_line, int line_count, int is_32cols)
143 memset(vout_buf, 0, 320 * 240 * 2);
144 vout_width = is_32cols ? 256 : 320;
145 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
148 void emu_32x_startup(void)
154 void lprintf(const char *fmt, ...)
159 fprintf(emu_log, "PicoDrive: ");
160 vfprintf(emu_log, fmt, list);
167 #include <android/log.h>
169 void lprintf(const char *fmt, ...)
174 __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
181 void retro_set_environment(retro_environment_t cb)
183 static const struct retro_variable vars[] = {
184 //{ "region", "Region; Auto|NTSC|PAL" },
190 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
193 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
194 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
195 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
196 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
197 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
199 unsigned retro_api_version(void)
201 return RETRO_API_VERSION;
204 void retro_set_controller_port_device(unsigned port, unsigned device)
208 void retro_get_system_info(struct retro_system_info *info)
210 memset(info, 0, sizeof(*info));
211 info->library_name = "PicoDrive";
212 info->library_version = VERSION;
213 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
214 info->need_fullpath = true;
217 void retro_get_system_av_info(struct retro_system_av_info *info)
219 memset(info, 0, sizeof(*info));
220 info->timing.fps = Pico.m.pal ? 50 : 60;
221 info->timing.sample_rate = 44100;
222 info->geometry.base_width = 320;
223 info->geometry.base_height = 240;
224 info->geometry.max_width = VOUT_MAX_WIDTH;
225 info->geometry.max_height = VOUT_MAX_HEIGHT;
226 info->geometry.aspect_ratio = 4.0 / 3.0;
229 /* savestates - TODO */
230 size_t retro_serialize_size(void)
235 bool retro_serialize(void *data, size_t size)
240 bool retro_unserialize(const void *data, size_t size)
246 void retro_cheat_reset(void)
250 void retro_cheat_set(unsigned index, bool enabled, const char *code)
254 /* multidisk support */
255 static bool disk_ejected;
256 static unsigned int disk_current_index;
257 static unsigned int disk_count;
258 static struct disks_state {
262 static bool disk_set_eject_state(bool ejected)
265 disk_ejected = ejected;
269 static bool disk_get_eject_state(void)
274 static unsigned int disk_get_image_index(void)
276 return disk_current_index;
279 static bool disk_set_image_index(unsigned int index)
284 if (index >= sizeof(disks) / sizeof(disks[0]))
287 if (disks[index].fname == NULL) {
288 lprintf("missing disk #%u\n", index);
290 // RetroArch specifies "no disk" with index == count,
291 // so don't fail here..
292 disk_current_index = index;
296 lprintf("switching to disk %u: \"%s\"\n", index,
300 cd_type = PicoCdCheck(disks[index].fname, NULL);
301 if (cd_type != CIT_NOT_CD)
302 ret = Insert_CD(disks[index].fname, cd_type);
304 lprintf("Load failed, invalid CD image?\n");
308 disk_current_index = index;
312 static unsigned int disk_get_num_images(void)
317 static bool disk_replace_image_index(unsigned index,
318 const struct retro_game_info *info)
322 if (index >= sizeof(disks) / sizeof(disks[0]))
325 if (disks[index].fname != NULL)
326 free(disks[index].fname);
327 disks[index].fname = NULL;
330 disks[index].fname = strdup(info->path);
331 if (index == disk_current_index)
332 ret = disk_set_image_index(index);
338 static bool disk_add_image_index(void)
340 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
347 static struct retro_disk_control_callback disk_control = {
348 .set_eject_state = disk_set_eject_state,
349 .get_eject_state = disk_get_eject_state,
350 .get_image_index = disk_get_image_index,
351 .set_image_index = disk_set_image_index,
352 .get_num_images = disk_get_num_images,
353 .replace_image_index = disk_replace_image_index,
354 .add_image_index = disk_add_image_index,
357 static void disk_tray_open(void)
359 lprintf("cd tray open\n");
363 static void disk_tray_close(void)
365 lprintf("cd tray close\n");
370 static const char * const biosfiles_us[] = {
371 "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
373 static const char * const biosfiles_eu[] = {
374 "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
376 static const char * const biosfiles_jp[] = {
377 "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
380 static void make_system_path(char *buf, size_t buf_size,
381 const char *name, const char *ext)
383 const char *dir = NULL;
385 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
386 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
389 snprintf(buf, buf_size, "%s%s", name, ext);
393 static const char *find_bios(int *region, const char *cd_fname)
395 const char * const *files;
396 static char path[256];
400 if (*region == 4) { // US
401 files = biosfiles_us;
402 count = sizeof(biosfiles_us) / sizeof(char *);
403 } else if (*region == 8) { // EU
404 files = biosfiles_eu;
405 count = sizeof(biosfiles_eu) / sizeof(char *);
406 } else if (*region == 1 || *region == 2) {
407 files = biosfiles_jp;
408 count = sizeof(biosfiles_jp) / sizeof(char *);
413 for (i = 0; i < count; i++)
415 make_system_path(path, sizeof(path), files[i], ".bin");
416 f = fopen(path, "rb");
420 make_system_path(path, sizeof(path), files[i], ".zip");
421 f = fopen(path, "rb");
427 lprintf("using bios: %s\n", path);
435 bool retro_load_game(const struct retro_game_info *info)
437 enum media_type_e media_type;
438 static char carthw_path[256];
441 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
442 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
443 lprintf("RGB565 suppot required, sorry\n");
447 if (info == NULL || info->path == NULL) {
448 lprintf("info->path required\n");
452 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
453 if (disks[i].fname != NULL) {
454 free(disks[i].fname);
455 disks[i].fname = NULL;
459 disk_current_index = 0;
461 disks[0].fname = strdup(info->path);
463 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
465 media_type = PicoLoadMedia(info->path, carthw_path,
468 switch (media_type) {
470 lprintf("Failed to detect ROM/CD image type.\n");
473 lprintf("Invalid CD image\n");
475 case PM_BAD_CD_NO_BIOS:
476 lprintf("Missing BIOS\n");
479 lprintf("Load error\n");
487 PicoWriteSound = snd_write;
488 memset(sndBuffer, 0, sizeof(sndBuffer));
495 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
500 void retro_unload_game(void)
504 unsigned retro_get_region(void)
506 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
509 void *retro_get_memory_data(unsigned id)
511 if (id != RETRO_MEMORY_SAVE_RAM)
514 if (PicoAHW & PAHW_MCD)
515 return Pico_mcd->bram;
520 size_t retro_get_memory_size(unsigned id)
522 if (id != RETRO_MEMORY_SAVE_RAM)
525 if (PicoAHW & PAHW_MCD)
532 void retro_reset(void)
537 static const unsigned short retro_pico_map[] = {
538 [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
539 [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
540 [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
541 [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
542 [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
543 [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
544 [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
545 [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
546 [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
547 [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
548 [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
549 [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
551 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
553 static void snd_write(int len)
555 audio_batch_cb(PsndOut, len / 4);
560 bool updated = false;
563 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
564 ; //update_variables(true);
568 PicoPad[0] = PicoPad[1] = 0;
569 for (pad = 0; pad < 2; pad++)
570 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
571 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
572 PicoPad[pad] |= retro_pico_map[i];
576 video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
579 void retro_init(void)
584 emu_log = fopen("/User/Documents/PicoDrive.log", "w");
586 emu_log = fopen("PicoDrive.log", "w");
592 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
594 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
596 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
597 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
598 | POPT_EN_32X|POPT_EN_PWM
599 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
601 PicoOpt |= POPT_EN_SVP_DRC;
604 PicoAutoRgnOrder = 0x184; // US, EU, JP
609 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
612 PicoDrawSetOutFormat(PDF_RGB555, 0);
613 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
615 //PicoMessage = plat_status_msg_busy_next;
616 PicoMCDopenTray = disk_tray_open;
617 PicoMCDcloseTray = disk_tray_close;
620 void retro_deinit(void)