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
18 #include <sys/types.h>
22 #include <libkern/OSCacheControl.h>
25 #include <pico/pico_int.h>
26 #include <pico/state.h>
27 #include "common/input_pico.h"
28 #include "common/version.h"
31 static retro_video_refresh_t video_cb;
32 static retro_input_poll_t input_poll_cb;
33 static retro_input_state_t input_state_cb;
34 static retro_environment_t environ_cb;
35 static retro_audio_sample_batch_t audio_batch_cb;
39 #define VOUT_MAX_WIDTH 320
40 #define VOUT_MAX_HEIGHT 240
41 static void *vout_buf;
42 static int vout_width, vout_height;
44 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
46 static void snd_write(int len);
54 /* functions called by the core */
56 void cache_flush_d_inval_i(void *start, void *end)
59 #if defined(__BLACKBERRY_QNX__)
60 msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
61 #elif defined(__MACH__)
62 size_t len = (char *)end - (char *)start;
63 sys_dcache_flush(start, len);
64 sys_icache_invalidate(start, len);
66 __clear_cache(start, end);
72 /* mmap() replacement for Windows
74 * Author: Mike Frysinger <vapier@gentoo.org>
75 * Placed into the public domain
79 * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
80 * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
81 * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
82 * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
86 #define PROT_WRITE 0x2
87 /* This flag is only available in WinXP+ */
88 #ifdef FILE_MAP_EXECUTE
92 #define FILE_MAP_EXECUTE 0
95 #define MAP_SHARED 0x01
96 #define MAP_PRIVATE 0x02
97 #define MAP_ANONYMOUS 0x20
98 #define MAP_ANON MAP_ANONYMOUS
99 #define MAP_FAILED ((void *) -1)
101 #ifdef __USE_FILE_OFFSET64
102 # define DWORD_HI(x) (x >> 32)
103 # define DWORD_LO(x) ((x) & 0xffffffff)
105 # define DWORD_HI(x) (0)
106 # define DWORD_LO(x) (x)
109 static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
111 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
114 if (!(flags & MAP_ANON) || offset)
116 } else if (flags & MAP_ANON)
120 if (prot & PROT_WRITE) {
121 if (prot & PROT_EXEC)
122 flProtect = PAGE_EXECUTE_READWRITE;
124 flProtect = PAGE_READWRITE;
125 } else if (prot & PROT_EXEC) {
126 if (prot & PROT_READ)
127 flProtect = PAGE_EXECUTE_READ;
128 else if (prot & PROT_EXEC)
129 flProtect = PAGE_EXECUTE;
131 flProtect = PAGE_READONLY;
133 off_t end = length + offset;
136 mmap_fd = INVALID_HANDLE_VALUE;
138 mmap_fd = (HANDLE)_get_osfhandle(fd);
139 h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
143 DWORD dwDesiredAccess;
144 if (prot & PROT_WRITE)
145 dwDesiredAccess = FILE_MAP_WRITE;
147 dwDesiredAccess = FILE_MAP_READ;
148 if (prot & PROT_EXEC)
149 dwDesiredAccess |= FILE_MAP_EXECUTE;
150 if (flags & MAP_PRIVATE)
151 dwDesiredAccess |= FILE_MAP_COPY;
152 void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
160 static void munmap(void *addr, size_t length)
162 UnmapViewOfFile(addr);
163 /* ruh-ro, we leaked handle from CreateFileMapping() ... */
167 #ifndef MAP_ANONYMOUS
168 #define MAP_ANONYMOUS MAP_ANON
171 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
173 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
177 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
178 if (ret == MAP_FAILED) {
179 lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
183 if (addr != 0 && ret != (void *)addr) {
184 lprintf("warning: wanted to map @%08lx, got %p\n",
196 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
199 void *ret = mremap(ptr, oldsize, newsize, 0);
200 if (ret == MAP_FAILED)
206 size_t preserve_size;
208 preserve_size = oldsize;
209 if (preserve_size > newsize)
210 preserve_size = newsize;
211 tmp = malloc(preserve_size);
214 memcpy(tmp, ptr, preserve_size);
216 munmap(ptr, oldsize);
217 ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
218 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
219 if (ret == MAP_FAILED) {
223 memcpy(ret, tmp, preserve_size);
229 void plat_munmap(void *ptr, size_t size)
235 int plat_mem_set_exec(void *ptr, size_t size)
238 int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
240 lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
242 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
244 lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
249 void emu_video_mode_change(int start_line, int line_count, int is_32cols)
251 memset(vout_buf, 0, 320 * 240 * 2);
252 vout_width = is_32cols ? 256 : 320;
253 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
256 void emu_32x_startup(void)
262 void lprintf(const char *fmt, ...)
267 fprintf(emu_log, "PicoDrive: ");
268 vfprintf(emu_log, fmt, list);
275 #include <android/log.h>
277 void lprintf(const char *fmt, ...)
282 __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
289 void retro_set_environment(retro_environment_t cb)
291 static const struct retro_variable vars[] = {
292 //{ "region", "Region; Auto|NTSC|PAL" },
293 { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
294 { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
295 { "picodrive_sprlim", "No sprite limit; disabled|enabled" },
296 { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
298 { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
305 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
308 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
309 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
310 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
311 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
312 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
314 unsigned retro_api_version(void)
316 return RETRO_API_VERSION;
319 void retro_set_controller_port_device(unsigned port, unsigned device)
323 void retro_get_system_info(struct retro_system_info *info)
325 memset(info, 0, sizeof(*info));
326 info->library_name = "PicoDrive";
327 info->library_version = VERSION;
328 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
329 info->need_fullpath = true;
332 void retro_get_system_av_info(struct retro_system_av_info *info)
334 memset(info, 0, sizeof(*info));
335 info->timing.fps = Pico.m.pal ? 50 : 60;
336 info->timing.sample_rate = 44100;
337 info->geometry.base_width = 320;
338 info->geometry.base_height = 240;
339 info->geometry.max_width = VOUT_MAX_WIDTH;
340 info->geometry.max_height = VOUT_MAX_HEIGHT;
341 info->geometry.aspect_ratio = 4.0 / 3.0;
345 struct savestate_state {
346 const char *load_buf;
352 size_t state_read(void *p, size_t size, size_t nmemb, void *file)
354 struct savestate_state *state = file;
355 size_t bsize = size * nmemb;
357 if (state->pos + bsize > state->size) {
358 lprintf("savestate error: %u/%u\n",
359 state->pos + bsize, state->size);
360 bsize = state->size - state->pos;
365 memcpy(p, state->load_buf + state->pos, bsize);
370 size_t state_write(void *p, size_t size, size_t nmemb, void *file)
372 struct savestate_state *state = file;
373 size_t bsize = size * nmemb;
375 if (state->pos + bsize > state->size) {
376 lprintf("savestate error: %u/%u\n",
377 state->pos + bsize, state->size);
378 bsize = state->size - state->pos;
383 memcpy(state->save_buf + state->pos, p, bsize);
388 size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
390 struct savestate_state *state = file;
391 size_t bsize = size * nmemb;
397 size_t state_eof(void *file)
399 struct savestate_state *state = file;
401 return state->pos >= state->size;
404 int state_fseek(void *file, long offset, int whence)
406 struct savestate_state *state = file;
413 state->pos += offset;
416 state->pos = state->size + offset;
419 return (int)state->pos;
422 /* savestate sizes vary wildly depending if cd/32x or
423 * carthw is active, so run the whole thing to get size */
424 size_t retro_serialize_size(void)
426 struct savestate_state state = { 0, };
429 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
436 bool retro_serialize(void *data, size_t size)
438 struct savestate_state state = { 0, };
441 state.save_buf = data;
445 ret = PicoStateFP(&state, 1, NULL, state_write,
450 bool retro_unserialize(const void *data, size_t size)
452 struct savestate_state state = { 0, };
455 state.load_buf = data;
459 ret = PicoStateFP(&state, 0, state_read, NULL,
460 state_eof, state_fseek);
465 void retro_cheat_reset(void)
469 void retro_cheat_set(unsigned index, bool enabled, const char *code)
473 /* multidisk support */
474 static bool disk_ejected;
475 static unsigned int disk_current_index;
476 static unsigned int disk_count;
477 static struct disks_state {
481 static bool disk_set_eject_state(bool ejected)
484 disk_ejected = ejected;
488 static bool disk_get_eject_state(void)
493 static unsigned int disk_get_image_index(void)
495 return disk_current_index;
498 static bool disk_set_image_index(unsigned int index)
503 if (index >= sizeof(disks) / sizeof(disks[0]))
506 if (disks[index].fname == NULL) {
507 lprintf("missing disk #%u\n", index);
509 // RetroArch specifies "no disk" with index == count,
510 // so don't fail here..
511 disk_current_index = index;
515 lprintf("switching to disk %u: \"%s\"\n", index,
519 cd_type = PicoCdCheck(disks[index].fname, NULL);
520 if (cd_type != CIT_NOT_CD)
521 ret = Insert_CD(disks[index].fname, cd_type);
523 lprintf("Load failed, invalid CD image?\n");
527 disk_current_index = index;
531 static unsigned int disk_get_num_images(void)
536 static bool disk_replace_image_index(unsigned index,
537 const struct retro_game_info *info)
541 if (index >= sizeof(disks) / sizeof(disks[0]))
544 if (disks[index].fname != NULL)
545 free(disks[index].fname);
546 disks[index].fname = NULL;
549 disks[index].fname = strdup(info->path);
550 if (index == disk_current_index)
551 ret = disk_set_image_index(index);
557 static bool disk_add_image_index(void)
559 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
566 static struct retro_disk_control_callback disk_control = {
567 .set_eject_state = disk_set_eject_state,
568 .get_eject_state = disk_get_eject_state,
569 .get_image_index = disk_get_image_index,
570 .set_image_index = disk_set_image_index,
571 .get_num_images = disk_get_num_images,
572 .replace_image_index = disk_replace_image_index,
573 .add_image_index = disk_add_image_index,
576 static void disk_tray_open(void)
578 lprintf("cd tray open\n");
582 static void disk_tray_close(void)
584 lprintf("cd tray close\n");
589 static const char * const biosfiles_us[] = {
590 "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
592 static const char * const biosfiles_eu[] = {
593 "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
595 static const char * const biosfiles_jp[] = {
596 "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
599 static void make_system_path(char *buf, size_t buf_size,
600 const char *name, const char *ext)
602 const char *dir = NULL;
604 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
605 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
608 snprintf(buf, buf_size, "%s%s", name, ext);
612 static const char *find_bios(int *region, const char *cd_fname)
614 const char * const *files;
615 static char path[256];
619 if (*region == 4) { // US
620 files = biosfiles_us;
621 count = sizeof(biosfiles_us) / sizeof(char *);
622 } else if (*region == 8) { // EU
623 files = biosfiles_eu;
624 count = sizeof(biosfiles_eu) / sizeof(char *);
625 } else if (*region == 1 || *region == 2) {
626 files = biosfiles_jp;
627 count = sizeof(biosfiles_jp) / sizeof(char *);
632 for (i = 0; i < count; i++)
634 make_system_path(path, sizeof(path), files[i], ".bin");
635 f = fopen(path, "rb");
639 make_system_path(path, sizeof(path), files[i], ".zip");
640 f = fopen(path, "rb");
646 lprintf("using bios: %s\n", path);
654 bool retro_load_game(const struct retro_game_info *info)
656 enum media_type_e media_type;
657 static char carthw_path[256];
660 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
661 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
662 lprintf("RGB565 support required, sorry\n");
666 if (info == NULL || info->path == NULL) {
667 lprintf("info->path required\n");
671 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
672 if (disks[i].fname != NULL) {
673 free(disks[i].fname);
674 disks[i].fname = NULL;
678 disk_current_index = 0;
680 disks[0].fname = strdup(info->path);
682 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
684 media_type = PicoLoadMedia(info->path, carthw_path,
687 switch (media_type) {
689 lprintf("Failed to detect ROM/CD image type.\n");
692 lprintf("Invalid CD image\n");
694 case PM_BAD_CD_NO_BIOS:
695 lprintf("Missing BIOS\n");
698 lprintf("Load error\n");
706 PicoWriteSound = snd_write;
707 memset(sndBuffer, 0, sizeof(sndBuffer));
714 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
719 void retro_unload_game(void)
723 unsigned retro_get_region(void)
725 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
728 void *retro_get_memory_data(unsigned id)
730 if (id != RETRO_MEMORY_SAVE_RAM)
733 if (PicoAHW & PAHW_MCD)
734 return Pico_mcd->bram;
739 size_t retro_get_memory_size(unsigned id)
741 if (id != RETRO_MEMORY_SAVE_RAM)
744 if (PicoAHW & PAHW_MCD)
751 void retro_reset(void)
756 static const unsigned short retro_pico_map[] = {
757 [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
758 [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
759 [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
760 [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
761 [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
762 [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
763 [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
764 [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
765 [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
766 [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
767 [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
768 [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
770 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
772 static void snd_write(int len)
774 audio_batch_cb(PsndOut, len / 4);
777 static enum input_device input_name_to_val(const char *name)
779 if (strcmp(name, "3 button pad") == 0)
780 return PICO_INPUT_PAD_3BTN;
781 if (strcmp(name, "6 button pad") == 0)
782 return PICO_INPUT_PAD_6BTN;
783 if (strcmp(name, "None") == 0)
784 return PICO_INPUT_NOTHING;
786 lprintf("invalid picodrive_input: '%s'\n", name);
787 return PICO_INPUT_PAD_3BTN;
790 static void update_variables(void)
792 struct retro_variable var;
795 var.key = "picodrive_input1";
796 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
797 PicoSetInputDevice(0, input_name_to_val(var.value));
800 var.key = "picodrive_input2";
801 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
802 PicoSetInputDevice(1, input_name_to_val(var.value));
805 var.key = "picodrive_sprlim";
806 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
807 if (strcmp(var.value, "enabled") == 0)
808 PicoOpt |= POPT_DIS_SPRITE_LIM;
810 PicoOpt &= ~POPT_DIS_SPRITE_LIM;
814 var.key = "picodrive_ramcart";
815 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
816 if (strcmp(var.value, "enabled") == 0)
817 PicoOpt |= POPT_EN_MCD_RAMCART;
819 PicoOpt &= ~POPT_EN_MCD_RAMCART;
824 var.key = "picodrive_drc";
825 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
826 if (strcmp(var.value, "enabled") == 0)
827 PicoOpt |= POPT_EN_DRC;
829 PicoOpt &= ~POPT_EN_DRC;
836 bool updated = false;
839 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
844 PicoPad[0] = PicoPad[1] = 0;
845 for (pad = 0; pad < 2; pad++)
846 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
847 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
848 PicoPad[pad] |= retro_pico_map[i];
852 video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
855 void retro_init(void)
860 emu_log = fopen("/User/Documents/PicoDrive.log", "w");
862 emu_log = fopen("PicoDrive.log", "w");
868 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
870 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
872 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
873 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
874 | POPT_EN_32X|POPT_EN_PWM
875 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
877 PicoOpt |= POPT_EN_DRC;
880 PicoAutoRgnOrder = 0x184; // US, EU, JP
885 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
888 PicoDrawSetOutFormat(PDF_RGB555, 0);
889 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
891 //PicoMessage = plat_status_msg_busy_next;
892 PicoMCDopenTray = disk_tray_open;
893 PicoMCDcloseTray = disk_tray_close;
898 void retro_deinit(void)