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, vout_offset;
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);
255 vout_height = line_count;
256 vout_offset = vout_width * start_line;
259 void emu_32x_startup(void)
265 void lprintf(const char *fmt, ...)
270 fprintf(emu_log, "PicoDrive: ");
271 vfprintf(emu_log, fmt, list);
278 #include <android/log.h>
280 void lprintf(const char *fmt, ...)
285 __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
292 void retro_set_environment(retro_environment_t cb)
294 static const struct retro_variable vars[] = {
295 //{ "region", "Region; Auto|NTSC|PAL" },
296 { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
297 { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
298 { "picodrive_sprlim", "No sprite limit; disabled|enabled" },
299 { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
301 { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
308 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
311 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
312 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
313 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
314 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
315 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
317 unsigned retro_api_version(void)
319 return RETRO_API_VERSION;
322 void retro_set_controller_port_device(unsigned port, unsigned device)
326 void retro_get_system_info(struct retro_system_info *info)
328 memset(info, 0, sizeof(*info));
329 info->library_name = "PicoDrive";
330 info->library_version = VERSION;
331 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
332 info->need_fullpath = true;
335 void retro_get_system_av_info(struct retro_system_av_info *info)
337 memset(info, 0, sizeof(*info));
338 info->timing.fps = Pico.m.pal ? 50 : 60;
339 info->timing.sample_rate = 44100;
340 info->geometry.base_width = 320;
341 info->geometry.base_height = vout_height;
342 info->geometry.max_width = VOUT_MAX_WIDTH;
343 info->geometry.max_height = VOUT_MAX_HEIGHT;
344 info->geometry.aspect_ratio = 0.0f;
348 struct savestate_state {
349 const char *load_buf;
355 size_t state_read(void *p, size_t size, size_t nmemb, void *file)
357 struct savestate_state *state = file;
358 size_t bsize = size * nmemb;
360 if (state->pos + bsize > state->size) {
361 lprintf("savestate error: %u/%u\n",
362 state->pos + bsize, state->size);
363 bsize = state->size - state->pos;
368 memcpy(p, state->load_buf + state->pos, bsize);
373 size_t state_write(void *p, size_t size, size_t nmemb, void *file)
375 struct savestate_state *state = file;
376 size_t bsize = size * nmemb;
378 if (state->pos + bsize > state->size) {
379 lprintf("savestate error: %u/%u\n",
380 state->pos + bsize, state->size);
381 bsize = state->size - state->pos;
386 memcpy(state->save_buf + state->pos, p, bsize);
391 size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
393 struct savestate_state *state = file;
394 size_t bsize = size * nmemb;
400 size_t state_eof(void *file)
402 struct savestate_state *state = file;
404 return state->pos >= state->size;
407 int state_fseek(void *file, long offset, int whence)
409 struct savestate_state *state = file;
416 state->pos += offset;
419 state->pos = state->size + offset;
422 return (int)state->pos;
425 /* savestate sizes vary wildly depending if cd/32x or
426 * carthw is active, so run the whole thing to get size */
427 size_t retro_serialize_size(void)
429 struct savestate_state state = { 0, };
432 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
439 bool retro_serialize(void *data, size_t size)
441 struct savestate_state state = { 0, };
444 state.save_buf = data;
448 ret = PicoStateFP(&state, 1, NULL, state_write,
453 bool retro_unserialize(const void *data, size_t size)
455 struct savestate_state state = { 0, };
458 state.load_buf = data;
462 ret = PicoStateFP(&state, 0, state_read, NULL,
463 state_eof, state_fseek);
468 void retro_cheat_reset(void)
472 void retro_cheat_set(unsigned index, bool enabled, const char *code)
476 /* multidisk support */
477 static bool disk_ejected;
478 static unsigned int disk_current_index;
479 static unsigned int disk_count;
480 static struct disks_state {
484 static bool disk_set_eject_state(bool ejected)
487 disk_ejected = ejected;
491 static bool disk_get_eject_state(void)
496 static unsigned int disk_get_image_index(void)
498 return disk_current_index;
501 static bool disk_set_image_index(unsigned int index)
503 enum cd_img_type cd_type;
506 if (index >= sizeof(disks) / sizeof(disks[0]))
509 if (disks[index].fname == NULL) {
510 lprintf("missing disk #%u\n", index);
512 // RetroArch specifies "no disk" with index == count,
513 // so don't fail here..
514 disk_current_index = index;
518 lprintf("switching to disk %u: \"%s\"\n", index,
522 cd_type = PicoCdCheck(disks[index].fname, NULL);
523 if (cd_type != CIT_NOT_CD)
524 ret = cdd_load(disks[index].fname, cd_type);
526 lprintf("Load failed, invalid CD image?\n");
530 disk_current_index = index;
534 static unsigned int disk_get_num_images(void)
539 static bool disk_replace_image_index(unsigned index,
540 const struct retro_game_info *info)
544 if (index >= sizeof(disks) / sizeof(disks[0]))
547 if (disks[index].fname != NULL)
548 free(disks[index].fname);
549 disks[index].fname = NULL;
552 disks[index].fname = strdup(info->path);
553 if (index == disk_current_index)
554 ret = disk_set_image_index(index);
560 static bool disk_add_image_index(void)
562 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
569 static struct retro_disk_control_callback disk_control = {
570 .set_eject_state = disk_set_eject_state,
571 .get_eject_state = disk_get_eject_state,
572 .get_image_index = disk_get_image_index,
573 .set_image_index = disk_set_image_index,
574 .get_num_images = disk_get_num_images,
575 .replace_image_index = disk_replace_image_index,
576 .add_image_index = disk_add_image_index,
579 static void disk_tray_open(void)
581 lprintf("cd tray open\n");
585 static void disk_tray_close(void)
587 lprintf("cd tray close\n");
592 static const char * const biosfiles_us[] = {
593 "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
595 static const char * const biosfiles_eu[] = {
596 "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
598 static const char * const biosfiles_jp[] = {
599 "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
602 static void make_system_path(char *buf, size_t buf_size,
603 const char *name, const char *ext)
605 const char *dir = NULL;
607 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
608 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
611 snprintf(buf, buf_size, "%s%s", name, ext);
615 static const char *find_bios(int *region, const char *cd_fname)
617 const char * const *files;
618 static char path[256];
622 if (*region == 4) { // US
623 files = biosfiles_us;
624 count = sizeof(biosfiles_us) / sizeof(char *);
625 } else if (*region == 8) { // EU
626 files = biosfiles_eu;
627 count = sizeof(biosfiles_eu) / sizeof(char *);
628 } else if (*region == 1 || *region == 2) {
629 files = biosfiles_jp;
630 count = sizeof(biosfiles_jp) / sizeof(char *);
635 for (i = 0; i < count; i++)
637 make_system_path(path, sizeof(path), files[i], ".bin");
638 f = fopen(path, "rb");
642 make_system_path(path, sizeof(path), files[i], ".zip");
643 f = fopen(path, "rb");
649 lprintf("using bios: %s\n", path);
657 bool retro_load_game(const struct retro_game_info *info)
659 enum media_type_e media_type;
660 static char carthw_path[256];
663 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
664 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
665 lprintf("RGB565 support required, sorry\n");
669 if (info == NULL || info->path == NULL) {
670 lprintf("info->path required\n");
674 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
675 if (disks[i].fname != NULL) {
676 free(disks[i].fname);
677 disks[i].fname = NULL;
681 disk_current_index = 0;
683 disks[0].fname = strdup(info->path);
685 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
687 media_type = PicoLoadMedia(info->path, carthw_path,
690 switch (media_type) {
692 lprintf("Failed to detect ROM/CD image type.\n");
695 lprintf("Invalid CD image\n");
697 case PM_BAD_CD_NO_BIOS:
698 lprintf("Missing BIOS\n");
701 lprintf("Load error\n");
709 PicoWriteSound = snd_write;
710 memset(sndBuffer, 0, sizeof(sndBuffer));
717 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
722 void retro_unload_game(void)
726 unsigned retro_get_region(void)
728 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
731 void *retro_get_memory_data(unsigned id)
733 if (id != RETRO_MEMORY_SAVE_RAM)
736 if (PicoAHW & PAHW_MCD)
737 return Pico_mcd->bram;
742 size_t retro_get_memory_size(unsigned id)
747 if (id != RETRO_MEMORY_SAVE_RAM)
750 if (PicoAHW & PAHW_MCD)
754 if (Pico.m.frame_count == 0)
757 // if game doesn't write to sram, don't report it to
758 // libretro so that RA doesn't write out zeroed .srm
759 for (i = 0, sum = 0; i < SRam.size; i++)
762 return (sum != 0) ? SRam.size : 0;
765 void retro_reset(void)
770 static const unsigned short retro_pico_map[] = {
771 [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
772 [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
773 [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
774 [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
775 [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
776 [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
777 [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
778 [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
779 [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
780 [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
781 [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
782 [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
784 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
786 static void snd_write(int len)
788 audio_batch_cb(PsndOut, len / 4);
791 static enum input_device input_name_to_val(const char *name)
793 if (strcmp(name, "3 button pad") == 0)
794 return PICO_INPUT_PAD_3BTN;
795 if (strcmp(name, "6 button pad") == 0)
796 return PICO_INPUT_PAD_6BTN;
797 if (strcmp(name, "None") == 0)
798 return PICO_INPUT_NOTHING;
800 lprintf("invalid picodrive_input: '%s'\n", name);
801 return PICO_INPUT_PAD_3BTN;
804 static void update_variables(void)
806 struct retro_variable var;
809 var.key = "picodrive_input1";
810 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
811 PicoSetInputDevice(0, input_name_to_val(var.value));
814 var.key = "picodrive_input2";
815 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
816 PicoSetInputDevice(1, input_name_to_val(var.value));
819 var.key = "picodrive_sprlim";
820 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
821 if (strcmp(var.value, "enabled") == 0)
822 PicoOpt |= POPT_DIS_SPRITE_LIM;
824 PicoOpt &= ~POPT_DIS_SPRITE_LIM;
828 var.key = "picodrive_ramcart";
829 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
830 if (strcmp(var.value, "enabled") == 0)
831 PicoOpt |= POPT_EN_MCD_RAMCART;
833 PicoOpt &= ~POPT_EN_MCD_RAMCART;
838 var.key = "picodrive_drc";
839 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
840 if (strcmp(var.value, "enabled") == 0)
841 PicoOpt |= POPT_EN_DRC;
843 PicoOpt &= ~POPT_EN_DRC;
850 bool updated = false;
853 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
858 PicoPad[0] = PicoPad[1] = 0;
859 for (pad = 0; pad < 2; pad++)
860 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
861 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
862 PicoPad[pad] |= retro_pico_map[i];
866 video_cb((short *)vout_buf + vout_offset,
867 vout_width, vout_height, vout_width * 2);
870 void retro_init(void)
875 emu_log = fopen("/User/Documents/PicoDrive.log", "w");
877 emu_log = fopen("PicoDrive.log", "w");
883 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
885 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
887 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
888 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
889 | POPT_EN_32X|POPT_EN_PWM
890 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
892 PicoOpt |= POPT_EN_DRC;
895 PicoAutoRgnOrder = 0x184; // US, EU, JP
899 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
902 PicoDrawSetOutFormat(PDF_RGB555, 0);
903 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
905 //PicoMessage = plat_status_msg_busy_next;
906 PicoMCDopenTray = disk_tray_open;
907 PicoMCDcloseTray = disk_tray_close;
912 void retro_deinit(void)