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"
32 #define MAP_ANONYMOUS MAP_ANON
35 static retro_video_refresh_t video_cb;
36 static retro_input_poll_t input_poll_cb;
37 static retro_input_state_t input_state_cb;
38 static retro_environment_t environ_cb;
39 static retro_audio_sample_batch_t audio_batch_cb;
43 #define VOUT_MAX_WIDTH 320
44 #define VOUT_MAX_HEIGHT 240
45 static void *vout_buf;
46 static int vout_width, vout_height;
48 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
50 static void snd_write(int len);
58 /* functions called by the core */
60 void cache_flush_d_inval_i(void *start, void *end)
63 #if defined(__BLACKBERRY_QNX__)
64 msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
65 #elif defined(__MACH__)
66 size_t len = (char *)end - (char *)start;
67 sys_dcache_flush(start, len);
68 sys_icache_invalidate(start, len);
70 __clear_cache(start, end);
76 /* mmap() replacement for Windows
78 * Author: Mike Frysinger <vapier@gentoo.org>
79 * Placed into the public domain
83 * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
84 * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
85 * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
86 * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
90 #define PROT_WRITE 0x2
91 /* This flag is only available in WinXP+ */
92 #ifdef FILE_MAP_EXECUTE
96 #define FILE_MAP_EXECUTE 0
99 #define MAP_SHARED 0x01
100 #define MAP_PRIVATE 0x02
101 #define MAP_ANONYMOUS 0x20
102 #define MAP_ANON MAP_ANONYMOUS
103 #define MAP_FAILED ((void *) -1)
105 #ifdef __USE_FILE_OFFSET64
106 # define DWORD_HI(x) (x >> 32)
107 # define DWORD_LO(x) ((x) & 0xffffffff)
109 # define DWORD_HI(x) (0)
110 # define DWORD_LO(x) (x)
113 static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
115 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
118 if (!(flags & MAP_ANON) || offset)
120 } else if (flags & MAP_ANON)
124 if (prot & PROT_WRITE) {
125 if (prot & PROT_EXEC)
126 flProtect = PAGE_EXECUTE_READWRITE;
128 flProtect = PAGE_READWRITE;
129 } else if (prot & PROT_EXEC) {
130 if (prot & PROT_READ)
131 flProtect = PAGE_EXECUTE_READ;
132 else if (prot & PROT_EXEC)
133 flProtect = PAGE_EXECUTE;
135 flProtect = PAGE_READONLY;
137 off_t end = length + offset;
140 mmap_fd = INVALID_HANDLE_VALUE;
142 mmap_fd = (HANDLE)_get_osfhandle(fd);
143 h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
147 DWORD dwDesiredAccess;
148 if (prot & PROT_WRITE)
149 dwDesiredAccess = FILE_MAP_WRITE;
151 dwDesiredAccess = FILE_MAP_READ;
152 if (prot & PROT_EXEC)
153 dwDesiredAccess |= FILE_MAP_EXECUTE;
154 if (flags & MAP_PRIVATE)
155 dwDesiredAccess |= FILE_MAP_COPY;
156 void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
164 static void munmap(void *addr, size_t length)
166 UnmapViewOfFile(addr);
167 /* ruh-ro, we leaked handle from CreateFileMapping() ... */
170 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
174 void *ret = mmap((void*)addr,size,PROT_READ | PROT_WRITE, flags, -1, 0);
175 if (addr != 0 && ret != (void *)addr) {
176 lprintf("warning: wanted to map @%08lx, got %p\n",
185 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
189 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
190 if (ret == MAP_FAILED) {
191 lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
195 if (addr != 0 && ret != (void *)addr) {
196 lprintf("warning: wanted to map @%08lx, got %p\n",
209 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
212 void *ret = mremap(ptr, oldsize, newsize, 0);
213 if (ret == MAP_FAILED)
219 size_t preserve_size;
221 preserve_size = oldsize;
222 if (preserve_size > newsize)
223 preserve_size = newsize;
224 tmp = malloc(preserve_size);
227 memcpy(tmp, ptr, preserve_size);
229 munmap(ptr, oldsize);
230 ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
231 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
232 if (ret == MAP_FAILED) {
236 memcpy(ret, tmp, preserve_size);
242 void plat_munmap(void *ptr, size_t size)
248 int plat_mem_set_exec(void *ptr, size_t size)
251 int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
253 lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
255 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
257 lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
262 void emu_video_mode_change(int start_line, int line_count, int is_32cols)
264 memset(vout_buf, 0, 320 * 240 * 2);
265 vout_width = is_32cols ? 256 : 320;
266 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
269 void emu_32x_startup(void)
275 void lprintf(const char *fmt, ...)
280 fprintf(emu_log, "PicoDrive: ");
281 vfprintf(emu_log, fmt, list);
288 #include <android/log.h>
290 void lprintf(const char *fmt, ...)
295 __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
302 void retro_set_environment(retro_environment_t cb)
304 static const struct retro_variable vars[] = {
305 //{ "region", "Region; Auto|NTSC|PAL" },
311 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
314 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
315 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
316 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
317 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
318 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
320 unsigned retro_api_version(void)
322 return RETRO_API_VERSION;
325 void retro_set_controller_port_device(unsigned port, unsigned device)
329 void retro_get_system_info(struct retro_system_info *info)
331 memset(info, 0, sizeof(*info));
332 info->library_name = "PicoDrive";
333 info->library_version = VERSION;
334 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
335 info->need_fullpath = true;
338 void retro_get_system_av_info(struct retro_system_av_info *info)
340 memset(info, 0, sizeof(*info));
341 info->timing.fps = Pico.m.pal ? 50 : 60;
342 info->timing.sample_rate = 44100;
343 info->geometry.base_width = 320;
344 info->geometry.base_height = 240;
345 info->geometry.max_width = VOUT_MAX_WIDTH;
346 info->geometry.max_height = VOUT_MAX_HEIGHT;
347 info->geometry.aspect_ratio = 4.0 / 3.0;
351 struct savestate_state {
352 const char *load_buf;
358 size_t state_read(void *p, size_t size, size_t nmemb, void *file)
360 struct savestate_state *state = file;
361 size_t bsize = size * nmemb;
363 if (state->pos + bsize > state->size) {
364 lprintf("savestate error: %u/%u\n",
365 state->pos + bsize, state->size);
366 bsize = state->size - state->pos;
371 memcpy(p, state->load_buf + state->pos, bsize);
376 size_t state_write(void *p, size_t size, size_t nmemb, void *file)
378 struct savestate_state *state = file;
379 size_t bsize = size * nmemb;
381 if (state->pos + bsize > state->size) {
382 lprintf("savestate error: %u/%u\n",
383 state->pos + bsize, state->size);
384 bsize = state->size - state->pos;
389 memcpy(state->save_buf + state->pos, p, bsize);
394 size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
396 struct savestate_state *state = file;
397 size_t bsize = size * nmemb;
403 size_t state_eof(void *file)
405 struct savestate_state *state = file;
407 return state->pos >= state->size;
410 int state_fseek(void *file, long offset, int whence)
412 struct savestate_state *state = file;
419 state->pos += offset;
422 state->pos = state->size + offset;
425 return (int)state->pos;
428 /* savestate sizes vary wildly depending if cd/32x or
429 * carthw is active, so run the whole thing to get size */
430 size_t retro_serialize_size(void)
432 struct savestate_state state = { 0, };
435 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
442 bool retro_serialize(void *data, size_t size)
444 struct savestate_state state = { 0, };
447 state.save_buf = data;
451 ret = PicoStateFP(&state, 1, NULL, state_write,
456 bool retro_unserialize(const void *data, size_t size)
458 struct savestate_state state = { 0, };
461 state.load_buf = data;
465 ret = PicoStateFP(&state, 0, state_read, NULL,
466 state_eof, state_fseek);
471 void retro_cheat_reset(void)
475 void retro_cheat_set(unsigned index, bool enabled, const char *code)
479 /* multidisk support */
480 static bool disk_ejected;
481 static unsigned int disk_current_index;
482 static unsigned int disk_count;
483 static struct disks_state {
487 static bool disk_set_eject_state(bool ejected)
490 disk_ejected = ejected;
494 static bool disk_get_eject_state(void)
499 static unsigned int disk_get_image_index(void)
501 return disk_current_index;
504 static bool disk_set_image_index(unsigned int index)
509 if (index >= sizeof(disks) / sizeof(disks[0]))
512 if (disks[index].fname == NULL) {
513 lprintf("missing disk #%u\n", index);
515 // RetroArch specifies "no disk" with index == count,
516 // so don't fail here..
517 disk_current_index = index;
521 lprintf("switching to disk %u: \"%s\"\n", index,
525 cd_type = PicoCdCheck(disks[index].fname, NULL);
526 if (cd_type != CIT_NOT_CD)
527 ret = Insert_CD(disks[index].fname, cd_type);
529 lprintf("Load failed, invalid CD image?\n");
533 disk_current_index = index;
537 static unsigned int disk_get_num_images(void)
542 static bool disk_replace_image_index(unsigned index,
543 const struct retro_game_info *info)
547 if (index >= sizeof(disks) / sizeof(disks[0]))
550 if (disks[index].fname != NULL)
551 free(disks[index].fname);
552 disks[index].fname = NULL;
555 disks[index].fname = strdup(info->path);
556 if (index == disk_current_index)
557 ret = disk_set_image_index(index);
563 static bool disk_add_image_index(void)
565 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
572 static struct retro_disk_control_callback disk_control = {
573 .set_eject_state = disk_set_eject_state,
574 .get_eject_state = disk_get_eject_state,
575 .get_image_index = disk_get_image_index,
576 .set_image_index = disk_set_image_index,
577 .get_num_images = disk_get_num_images,
578 .replace_image_index = disk_replace_image_index,
579 .add_image_index = disk_add_image_index,
582 static void disk_tray_open(void)
584 lprintf("cd tray open\n");
588 static void disk_tray_close(void)
590 lprintf("cd tray close\n");
595 static const char * const biosfiles_us[] = {
596 "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
598 static const char * const biosfiles_eu[] = {
599 "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
601 static const char * const biosfiles_jp[] = {
602 "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
605 static void make_system_path(char *buf, size_t buf_size,
606 const char *name, const char *ext)
608 const char *dir = NULL;
610 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
611 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
614 snprintf(buf, buf_size, "%s%s", name, ext);
618 static const char *find_bios(int *region, const char *cd_fname)
620 const char * const *files;
621 static char path[256];
625 if (*region == 4) { // US
626 files = biosfiles_us;
627 count = sizeof(biosfiles_us) / sizeof(char *);
628 } else if (*region == 8) { // EU
629 files = biosfiles_eu;
630 count = sizeof(biosfiles_eu) / sizeof(char *);
631 } else if (*region == 1 || *region == 2) {
632 files = biosfiles_jp;
633 count = sizeof(biosfiles_jp) / sizeof(char *);
638 for (i = 0; i < count; i++)
640 make_system_path(path, sizeof(path), files[i], ".bin");
641 f = fopen(path, "rb");
645 make_system_path(path, sizeof(path), files[i], ".zip");
646 f = fopen(path, "rb");
652 lprintf("using bios: %s\n", path);
660 bool retro_load_game(const struct retro_game_info *info)
662 enum media_type_e media_type;
663 static char carthw_path[256];
666 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
667 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
668 lprintf("RGB565 suppot required, sorry\n");
672 if (info == NULL || info->path == NULL) {
673 lprintf("info->path required\n");
677 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
678 if (disks[i].fname != NULL) {
679 free(disks[i].fname);
680 disks[i].fname = NULL;
684 disk_current_index = 0;
686 disks[0].fname = strdup(info->path);
688 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
690 media_type = PicoLoadMedia(info->path, carthw_path,
693 switch (media_type) {
695 lprintf("Failed to detect ROM/CD image type.\n");
698 lprintf("Invalid CD image\n");
700 case PM_BAD_CD_NO_BIOS:
701 lprintf("Missing BIOS\n");
704 lprintf("Load error\n");
712 PicoWriteSound = snd_write;
713 memset(sndBuffer, 0, sizeof(sndBuffer));
720 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
725 void retro_unload_game(void)
729 unsigned retro_get_region(void)
731 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
734 void *retro_get_memory_data(unsigned id)
736 if (id != RETRO_MEMORY_SAVE_RAM)
739 if (PicoAHW & PAHW_MCD)
740 return Pico_mcd->bram;
745 size_t retro_get_memory_size(unsigned id)
747 if (id != RETRO_MEMORY_SAVE_RAM)
750 if (PicoAHW & PAHW_MCD)
757 void retro_reset(void)
762 static const unsigned short retro_pico_map[] = {
763 [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
764 [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
765 [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
766 [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
767 [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
768 [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
769 [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
770 [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
771 [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
772 [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
773 [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
774 [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,
776 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
778 static void snd_write(int len)
780 audio_batch_cb(PsndOut, len / 4);
785 bool updated = false;
788 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
789 ; //update_variables(true);
793 PicoPad[0] = PicoPad[1] = 0;
794 for (pad = 0; pad < 2; pad++)
795 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
796 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
797 PicoPad[pad] |= retro_pico_map[i];
801 video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
804 void retro_init(void)
809 emu_log = fopen("/User/Documents/PicoDrive.log", "w");
811 emu_log = fopen("PicoDrive.log", "w");
817 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
819 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
821 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
822 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
823 | POPT_EN_32X|POPT_EN_PWM
824 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
826 PicoOpt |= POPT_EN_SVP_DRC;
829 PicoAutoRgnOrder = 0x184; // US, EU, JP
834 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
837 PicoDrawSetOutFormat(PDF_RGB555, 0);
838 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
840 //PicoMessage = plat_status_msg_busy_next;
841 PicoMCDopenTray = disk_tray_open;
842 PicoMCDcloseTray = disk_tray_close;
845 void retro_deinit(void)