lxdream 0.9.1| filename | src/dreamcast.c |
| changeset | 1279:142110f63902 |
| prev | 1270:65fd19c07e2e |
| author | nkeynes |
| date | Sun May 24 19:46:06 2015 +1000 (8 years ago) |
| permissions | -rw-r--r-- |
| last change | Remove static from gl_load_frame_buffer() - also needed by video_egl.c Fix error location in gl_frame_buffer_to_tex |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 * Central switchboard for the system. This pulls all the individual modules
4 * together into some kind of coherent structure. This is also where you'd
5 * add Naomi support, if I ever get a board to play with...
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
20 #include <errno.h>
21 #include <glib.h>
22 #include <unistd.h>
23 #include "lxdream.h"
24 #include "lxpaths.h"
25 #include "dream.h"
26 #include "eventq.h"
27 #include "mem.h"
28 #include "dreamcast.h"
29 #include "asic.h"
30 #include "syscall.h"
31 #include "gui.h"
32 #include "aica/aica.h"
33 #include "gdrom/ide.h"
34 #include "maple/maple.h"
35 #include "pvr2/pvr2.h"
36 #include "sh4/sh4.h"
37 #include "sh4/sh4core.h"
38 #include "vmu/vmulist.h"
41 static gboolean dreamcast_load_bios( const gchar *filename );
43 /**
44 * Current state of the DC virtual machine
45 */
46 typedef enum { STATE_UNINIT=0, STATE_RUNNING,
47 STATE_STOPPING, STATE_STOPPED } dreamcast_state_t;
49 static volatile dreamcast_state_t dreamcast_state = STATE_UNINIT;
50 static gboolean dreamcast_use_bios = TRUE;
51 static gboolean dreamcast_has_bios = FALSE;
52 static gboolean dreamcast_has_flash = FALSE;
53 static gboolean dreamcast_exit_on_stop = FALSE;
54 static gchar *dreamcast_program_name = NULL;
55 static sh4addr_t dreamcast_entry_point = 0xA0000000;
56 static uint32_t timeslice_length = DEFAULT_TIMESLICE_LENGTH;
57 static uint64_t run_time_nanosecs = 0;
58 static unsigned int quick_save_state = -1;
60 #define MAX_MODULES 32
61 static int num_modules = 0;
62 dreamcast_module_t modules[MAX_MODULES];
64 /**
65 * The unknown module is used for logging files without an actual module
66 * declaration
67 */
68 struct dreamcast_module unknown_module = { "****", NULL, NULL, NULL, NULL,
69 NULL, NULL, NULL };
71 extern struct mem_region_fn mem_region_sdram;
72 extern struct mem_region_fn mem_region_vram32;
73 extern struct mem_region_fn mem_region_vram64;
74 extern struct mem_region_fn mem_region_audioram;
75 extern struct mem_region_fn mem_region_audioscratch;
76 extern struct mem_region_fn mem_region_flashram;
77 extern struct mem_region_fn mem_region_bootrom;
78 extern struct mem_region_fn mem_region_pvr2ta;
79 extern struct mem_region_fn mem_region_pvr2yuv;
80 extern struct mem_region_fn mem_region_pvr2vdma1;
81 extern struct mem_region_fn mem_region_pvr2vdma2;
83 unsigned char dc_main_ram[16 MB];
84 unsigned char dc_boot_rom[2 MB];
85 unsigned char dc_flash_ram[128 KB];
87 /**
88 * This function is responsible for defining how all the pieces of the
89 * dreamcast actually fit together.
90 *
91 * Note currently the locations of the various MMIO pages are hard coded in
92 * the MMIO definitions - they should probably be moved here.
93 */
94 void dreamcast_configure( gboolean use_bootrom )
95 {
96 char *bios_path = lxdream_get_global_config_path_value(CONFIG_BIOS_PATH);
97 char *flash_path = lxdream_get_global_config_path_value(CONFIG_FLASH_PATH);
99 /* Initialize the event queue first */
100 event_init();
102 /* Register the memory framework */
103 dreamcast_register_module( &mem_module );
105 /* Setup standard memory map */
106 mem_map_region( dc_boot_rom, 0x00000000, 2 MB, MEM_REGION_BIOS, &mem_region_bootrom, MEM_FLAG_ROM, 2 MB, 0 );
107 mem_map_region( dc_flash_ram, 0x00200000, 128 KB, MEM_REGION_FLASH, &mem_region_flashram, MEM_FLAG_RAM, 128 KB, 0 );
108 mem_map_region( aica_main_ram, 0x00800000, 2 MB, MEM_REGION_AUDIO, &mem_region_audioram, MEM_FLAG_RAM, 2 MB, 0 );
109 mem_map_region( aica_scratch_ram,0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH,&mem_region_audioscratch, MEM_FLAG_RAM, 8 KB, 0 );
110 mem_map_region( NULL, 0x04000000, 8 MB, MEM_REGION_VIDEO64, &mem_region_vram64, 0, 8 MB, 0 );
111 mem_map_region( pvr2_main_ram, 0x05000000, 8 MB, MEM_REGION_VIDEO, &mem_region_vram32, MEM_FLAG_RAM, 8 MB, 0 );
112 mem_map_region( dc_main_ram, 0x0C000000, 16 MB, MEM_REGION_MAIN, &mem_region_sdram, MEM_FLAG_RAM, 0x01000000, 0x0F000000 );
113 mem_map_region( NULL, 0x10000000, 8 MB, MEM_REGION_PVR2TA, &mem_region_pvr2ta, 0, 0x02000000, 0x12000000 );
114 mem_map_region( NULL, 0x10800000, 8 MB, MEM_REGION_PVR2YUV, &mem_region_pvr2yuv, 0, 0x02000000, 0x12800000 );
115 mem_map_region( NULL, 0x11000000, 16 MB, MEM_REGION_PVR2VDMA1, &mem_region_pvr2vdma1, 0, 16 MB, 0 );
116 mem_map_region( NULL, 0x13000000, 16 MB, MEM_REGION_PVR2VDMA2, &mem_region_pvr2vdma2, 0, 16 MB, 0 );
118 dreamcast_use_bios = use_bootrom;
119 dreamcast_has_bios = dreamcast_load_bios( bios_path );
120 if( !dreamcast_has_bios ) {
121 dreamcast_load_fakebios();
122 }
124 if( flash_path != NULL && flash_path[0] != '\0' ) {
125 mem_load_block( flash_path, 0x00200000, 0x00020000 );
126 }
127 dreamcast_has_flash = TRUE;
129 /* Load in the rest of the core modules */
130 dreamcast_register_module( &sh4_module );
131 dreamcast_register_module( &asic_module );
132 dreamcast_register_module( &pvr2_module );
133 dreamcast_register_module( &aica_module );
134 dreamcast_register_module( &maple_module );
135 dreamcast_register_module( &ide_module );
136 dreamcast_register_module( &eventq_module );
138 g_free(bios_path);
139 g_free(flash_path);
140 }
142 static gboolean dreamcast_load_bios( const gchar *filename )
143 {
144 if( dreamcast_use_bios ) {
145 dreamcast_has_bios = mem_load_rom( dc_boot_rom, filename, 2 MB, 0x89f2b1a1 );
146 } else {
147 dreamcast_has_bios = FALSE;
148 }
149 return dreamcast_has_bios;
150 }
152 static const char fakebios[] = {
153 0x00, 0xd1, /* movl $+4, r1 */
154 0x2b, 0x41, /* jmp @r1 */
155 0xa0, 0xff, /* .long 0xffffffa0 */
156 0xff, 0xff };
157 gboolean dreamcast_load_fakebios( )
158 {
159 memset( dc_boot_rom, 0, 2 MB );
160 memcpy( dc_boot_rom, fakebios, sizeof(fakebios) );
161 syscall_add_hook( 0xA0, bios_boot );
162 dreamcast_has_bios = TRUE;
163 return TRUE;
164 }
166 gboolean dreamcast_load_flash( const gchar *filename )
167 {
168 if( filename != NULL && filename[0] != '\0' ) {
169 return mem_load_block( filename, 0x00200000, 0x00020000 ) == 0;
170 }
171 return FALSE;
172 }
175 gboolean dreamcast_config_changed(void *data, struct lxdream_config_group *group, unsigned item,
176 const gchar *oldval, const gchar *newval)
177 {
178 gchar *tmp;
179 switch(item) {
180 case CONFIG_BIOS_PATH:
181 tmp = get_expanded_path(newval);
182 dreamcast_load_bios(tmp);
183 g_free(tmp);
184 break;
185 case CONFIG_FLASH_PATH:
186 tmp = get_expanded_path(newval);
187 dreamcast_load_flash(tmp);
188 g_free(tmp);
189 break;
190 }
191 reset_gui_paths();
192 return TRUE;
193 }
195 void dreamcast_save_flash()
196 {
197 if( dreamcast_has_flash ) {
198 char *file = lxdream_get_global_config_path_value(CONFIG_FLASH_PATH);
199 mem_save_block( file, 0x00200000, 0x00020000 );
200 g_free(file);
201 }
202 }
204 /**
205 * Constructs a system configuration for the AICA in standalone mode,
206 * ie sound chip only.
207 */
208 void dreamcast_configure_aica_only( )
209 {
210 dreamcast_register_module( &mem_module );
211 mem_map_region( aica_main_ram, 0x00800000, 2 MB, MEM_REGION_AUDIO, &mem_region_audioram, MEM_FLAG_RAM, 2 MB, 0 );
212 mem_map_region( aica_scratch_ram, 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH, &mem_region_audioscratch, MEM_FLAG_RAM, 8 KB, 0 );
213 dreamcast_register_module( &aica_module );
214 aica_enable();
215 dreamcast_state = STATE_STOPPED;
216 }
218 void dreamcast_register_module( dreamcast_module_t module )
219 {
220 assert( num_modules < MAX_MODULES );
221 modules[num_modules++] = module;
222 if( module->init != NULL )
223 module->init();
224 }
226 void dreamcast_set_run_time( uint32_t secs, uint32_t nanosecs )
227 {
228 run_time_nanosecs = (((uint64_t)secs) * 1000000000) + nanosecs;
229 }
231 void dreamcast_set_exit_on_stop( gboolean flag )
232 {
233 dreamcast_exit_on_stop = flag;
234 }
236 void dreamcast_init( gboolean use_bootrom )
237 {
238 dreamcast_configure( use_bootrom );
239 dreamcast_state = STATE_STOPPED;
240 }
242 void dreamcast_reset( void )
243 {
244 sh4_core_exit(CORE_EXIT_SYSRESET);
245 int i;
246 for( i=0; i<num_modules; i++ ) {
247 if( modules[i]->reset != NULL )
248 modules[i]->reset();
249 }
250 }
252 void dreamcast_run( void )
253 {
254 int i;
256 if( !dreamcast_can_run() ) {
257 ERROR(_("No program is loaded, and no BIOS is configured (required to boot a CD image). To continue, either load a binary program, or set the path to your BIOS file in the Path Preferences"));
258 return;
259 }
261 if( dreamcast_state != STATE_RUNNING ) {
262 for( i=0; i<num_modules; i++ ) {
263 if( modules[i]->start != NULL )
264 modules[i]->start();
265 }
266 }
268 if( maple_should_grab() ) {
269 gui_set_use_grab(TRUE);
270 }
272 dreamcast_state = STATE_RUNNING;
274 if( run_time_nanosecs != 0 ) {
275 while( dreamcast_state == STATE_RUNNING ) {
276 uint32_t time_to_run = timeslice_length;
277 if( run_time_nanosecs < time_to_run ) {
278 time_to_run = (uint32_t)run_time_nanosecs;
279 }
281 for( i=0; i<num_modules; i++ ) {
282 if( modules[i]->run_time_slice != NULL )
283 time_to_run = modules[i]->run_time_slice( time_to_run );
284 }
286 if( run_time_nanosecs > time_to_run ) {
287 run_time_nanosecs -= time_to_run;
288 } else {
289 run_time_nanosecs = 0; // Finished
290 break;
291 }
292 }
293 } else {
294 while( dreamcast_state == STATE_RUNNING ) {
295 int time_to_run = timeslice_length;
296 for( i=0; i<num_modules; i++ ) {
297 if( modules[i]->run_time_slice != NULL )
298 time_to_run = modules[i]->run_time_slice( time_to_run );
299 }
301 }
302 }
304 gui_set_use_grab(FALSE);
306 for( i=0; i<num_modules; i++ ) {
307 if( modules[i]->stop != NULL )
308 modules[i]->stop();
309 }
311 vmulist_save_all();
312 dreamcast_state = STATE_STOPPED;
314 if( dreamcast_exit_on_stop ) {
315 dreamcast_shutdown();
316 exit(0);
317 }
318 }
320 void dreamcast_stop( void )
321 {
322 sh4_core_exit(CORE_EXIT_HALT); // returns only if not inside SH4 core
323 if( dreamcast_state == STATE_RUNNING )
324 dreamcast_state = STATE_STOPPING;
325 }
327 void dreamcast_shutdown()
328 {
329 // Don't do a dreamcast_stop - if we're calling this out of SH4 code,
330 // it's a shutdown-and-quit event
331 if( dreamcast_state == STATE_RUNNING )
332 dreamcast_state = STATE_STOPPING;
333 dreamcast_save_flash();
334 vmulist_save_all();
335 #ifdef ENABLE_SH4STATS
336 sh4_stats_print(stdout);
337 #endif
338 }
340 void dreamcast_program_loaded( const gchar *name, sh4addr_t entry_point )
341 {
342 if( dreamcast_program_name != NULL ) {
343 g_free(dreamcast_program_name);
344 }
345 dreamcast_program_name = g_strdup(name);
346 dreamcast_entry_point = entry_point;
347 sh4_set_pc(entry_point);
348 sh4_write_sr( sh4_read_sr() & (~SR_BL) ); /* Unmask interrupts */
349 bios_install();
350 dcload_install();
351 gui_update_state();
352 }
354 gboolean dreamcast_is_running( void )
355 {
356 return dreamcast_state == STATE_RUNNING;
357 }
359 gboolean dreamcast_can_run(void)
360 {
361 return dreamcast_state != STATE_UNINIT;
362 }
364 /********************************* Save States *****************************/
366 struct save_state_header {
367 char magic[16];
368 uint32_t version;
369 uint32_t module_count;
370 };
372 struct chunk_header {
373 char marker[4]; /* Always BLCK */
374 char name[8]; /* Block (module) name */
375 uint32_t block_length;
376 };
378 /**
379 * Check the save state header to ensure that it is a valid, supported
380 * file.
381 * @return the number of blocks following, or 0 if the file is invalid.
382 */
383 int dreamcast_read_save_state_header( FILE *f, char *error, int errorlen )
384 {
385 struct save_state_header header;
386 if( fread( &header, sizeof(header), 1, f ) != 1 ) {
387 return 0;
388 }
389 if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) {
390 if( error != NULL )
391 snprintf( error, errorlen, _("File is not a %s save state"), APP_NAME );
392 return 0;
393 }
394 if( header.version != DREAMCAST_SAVE_VERSION ) {
395 if( error != NULL )
396 snprintf( error, errorlen, _("Unsupported %s save state version"), APP_NAME );
397 return 0;
398 }
399 if( header.module_count > MAX_MODULES ) {
400 if( error != NULL )
401 snprintf( error, errorlen, _("%s save state is corrupted (bad module count)"), APP_NAME );
402 return 0;
403 }
404 return header.module_count;
405 }
407 int dreamcast_write_chunk_header( const gchar *name, uint32_t length, FILE *f )
408 {
409 struct chunk_header head;
411 memcpy( head.marker, "BLCK", 4 );
412 memset( head.name, 0, 8 );
413 memcpy( head.name, name, strlen(name) );
414 head.block_length = length;
415 return fwrite( &head, sizeof(head), 1, f );
416 }
419 frame_buffer_t dreamcast_load_preview( const gchar *filename )
420 {
421 int i;
422 FILE *f = fopen( filename, "r" );
423 if( f == NULL ) return NULL;
425 int module_count = dreamcast_read_save_state_header(f, NULL, 0);
426 if( module_count <= 0 ) {
427 fclose(f);
428 return NULL;
429 }
430 for( i=0; i<module_count; i++ ) {
431 struct chunk_header head;
432 if( fread( &head, sizeof(head), 1, f ) != 1 ) {
433 fclose(f);
434 return NULL;
435 }
436 if( memcmp("BLCK", head.marker, 4) != 0 ) {
437 fclose(f);
438 return NULL;
439 }
441 if( strcmp("PVR2", head.name) == 0 ) {
442 uint32_t buf_count;
443 int has_front;
444 fread( &buf_count, sizeof(buf_count), 1, f );
445 fread( &has_front, sizeof(has_front), 1, f );
446 if( buf_count != 0 && has_front ) {
447 frame_buffer_t result = read_png_from_stream(f);
448 fclose(f);
449 return result;
450 }
451 break;
452 } else {
453 fseek( f, head.block_length, SEEK_CUR );
454 }
455 }
456 return NULL;
457 }
459 gboolean dreamcast_load_state( const gchar *filename )
460 {
461 int i,j;
462 int module_count;
463 char error[128];
464 int have_read[MAX_MODULES];
466 FILE *f = fopen( filename, "r" );
467 if( f == NULL ) return FALSE;
469 module_count = dreamcast_read_save_state_header(f, error, sizeof(error));
470 if( module_count <= 0 ) {
471 ERROR( error );
472 fclose(f);
473 return FALSE;
474 }
476 for( i=0; i<MAX_MODULES; i++ ) {
477 have_read[i] = 0;
478 }
480 for( i=0; i<module_count; i++ ) {
481 struct chunk_header chunk;
482 fread( &chunk, sizeof(chunk), 1, f );
483 if( strncmp(chunk.marker, "BLCK", 4) != 0 ) {
484 ERROR( "%s save state is corrupted (missing block header %d)", APP_NAME, i );
485 fclose(f);
486 return FALSE;
487 }
489 /* Find the matching module by name */
490 for( j=0; j<num_modules; j++ ) {
491 if( strcmp(modules[j]->name,chunk.name) == 0 ) {
492 have_read[j] = 1;
493 if( modules[j]->load == NULL ) {
494 ERROR( "%s save state is corrupted (no loader for %s)", APP_NAME, modules[j]->name );
495 fclose(f);
496 return FALSE;
497 } else if( modules[j]->load(f) != 0 ) {
498 ERROR( "%s save state is corrupted (%s failed)", APP_NAME, modules[j]->name );
499 fclose(f);
500 return FALSE;
501 }
502 break;
503 }
504 }
505 if( j == num_modules ) {
506 fclose(f);
507 ERROR( "%s save state contains unrecognized section", APP_NAME );
508 return FALSE;
509 }
510 }
512 /* Any modules that we didn't load - reset to the default state.
513 * (ie it's not an error to skip a module if you don't actually
514 * care about its state).
515 */
516 for( j=0; j<num_modules; j++ ) {
517 if( have_read[j] == 0 && modules[j]->reset != NULL ) {
518 modules[j]->reset();
519 }
520 }
521 fclose(f);
522 INFO( "Save state read from %s", filename );
523 return TRUE;
524 }
526 int dreamcast_save_state( const gchar *filename )
527 {
528 int i;
529 FILE *f;
530 struct save_state_header header;
532 f = fopen( filename, "w" );
533 if( f == NULL )
534 return errno;
535 strcpy( header.magic, DREAMCAST_SAVE_MAGIC );
536 header.version = DREAMCAST_SAVE_VERSION;
537 header.module_count = 0;
539 for( i=0; i<num_modules; i++ ) {
540 if( modules[i]->save != NULL )
541 header.module_count++;
542 }
543 fwrite( &header, sizeof(header), 1, f );
544 for( i=0; i<num_modules; i++ ) {
545 if( modules[i]->save != NULL ) {
546 uint32_t blocklen, posn1, posn2;
547 dreamcast_write_chunk_header( modules[i]->name, 0, f );
548 posn1 = ftell(f);
549 modules[i]->save(f);
550 posn2 = ftell(f);
551 blocklen = posn2 - posn1;
552 fseek( f, posn1-4, SEEK_SET );
553 fwrite( &blocklen, sizeof(blocklen), 1, f );
554 fseek( f, posn2, SEEK_SET );
555 }
556 }
557 fclose( f );
558 INFO( "Save state written to %s", filename );
559 return 0;
560 }
562 /********************** Quick save state support ***********************/
563 /* This section doesn't necessarily belong here, but it probably makes the
564 * most sense here next to the regular save/load functions
565 */
567 static gchar *get_quick_state_filename( int state )
568 {
569 gchar *path = lxdream_get_global_config_path_value(CONFIG_SAVE_PATH);
570 gchar *str = g_strdup_printf( QUICK_STATE_FILENAME, path, state );
571 g_free( path );
572 return str;
573 }
576 static void dreamcast_quick_state_init()
577 {
578 const char *state = lxdream_get_global_config_value(CONFIG_QUICK_STATE);
579 if( state != NULL ) {
580 quick_save_state = atoi(state);
581 if( quick_save_state > MAX_QUICK_STATE ) {
582 quick_save_state = 0;
583 }
584 } else {
585 quick_save_state = 0;
586 }
587 }
589 void dreamcast_quick_save()
590 {
591 if( quick_save_state == -1 )
592 dreamcast_quick_state_init();
593 gchar *str = get_quick_state_filename(quick_save_state);
594 dreamcast_save_state(str);
595 g_free(str);
596 }
598 void dreamcast_quick_load()
599 {
600 if( quick_save_state == -1 )
601 dreamcast_quick_state_init();
602 gchar *str = get_quick_state_filename(quick_save_state);
603 dreamcast_load_state(str);
604 g_free(str);
605 }
607 unsigned int dreamcast_get_quick_state( )
608 {
609 if( quick_save_state == -1 )
610 dreamcast_quick_state_init();
611 return quick_save_state;
612 }
614 void dreamcast_set_quick_state( unsigned int state )
615 {
616 if( state <= MAX_QUICK_STATE && state != quick_save_state ) {
617 quick_save_state = state;
618 char buf[3];
619 sprintf( buf, "%d", quick_save_state );
620 lxdream_set_global_config_value(CONFIG_QUICK_STATE, buf);
621 lxdream_save_config();
622 }
623 }
625 gboolean dreamcast_has_quick_state( unsigned int state )
626 {
627 gchar *str = get_quick_state_filename(state);
628 int result = access(str, R_OK);
629 g_free(str);
630 return result == 0 ? TRUE : FALSE;
631 }
633 /********************* The Boot ROM address space **********************/
634 static int32_t FASTCALL ext_bootrom_read_long( sh4addr_t addr )
635 {
636 return *((int32_t *)(dc_boot_rom + (addr&0x001FFFFF)));
637 }
638 static int32_t FASTCALL ext_bootrom_read_word( sh4addr_t addr )
639 {
640 return SIGNEXT16(*((int16_t *)(dc_boot_rom + (addr&0x001FFFFF))));
641 }
642 static int32_t FASTCALL ext_bootrom_read_byte( sh4addr_t addr )
643 {
644 return SIGNEXT8(*((int16_t *)(dc_boot_rom + (addr&0x001FFFFF))));
645 }
646 static void FASTCALL ext_bootrom_read_burst( unsigned char *dest, sh4addr_t addr )
647 {
648 memcpy( dest, dc_boot_rom +(addr&0x001FFFFF), 32 );
649 }
651 struct mem_region_fn mem_region_bootrom = {
652 ext_bootrom_read_long, unmapped_write_long,
653 ext_bootrom_read_word, unmapped_write_long,
654 ext_bootrom_read_byte, unmapped_write_long,
655 ext_bootrom_read_burst, unmapped_write_burst };
657 /********************* The Flash RAM address space **********************/
658 static int32_t FASTCALL ext_flashram_read_long( sh4addr_t addr )
659 {
660 return *((int32_t *)(dc_flash_ram + (addr&0x0001FFFF)));
661 }
662 static int32_t FASTCALL ext_flashram_read_word( sh4addr_t addr )
663 {
664 return SIGNEXT16(*((int16_t *)(dc_flash_ram + (addr&0x0001FFFF))));
665 }
666 static int32_t FASTCALL ext_flashram_read_byte( sh4addr_t addr )
667 {
668 return SIGNEXT8(*((int16_t *)(dc_flash_ram + (addr&0x0001FFFF))));
669 }
670 static void FASTCALL ext_flashram_write_long( sh4addr_t addr, uint32_t val )
671 {
672 *(uint32_t *)(dc_flash_ram + (addr&0x0001FFFF)) = val;
673 asic_g2_write_word();
674 }
675 static void FASTCALL ext_flashram_write_word( sh4addr_t addr, uint32_t val )
676 {
677 *(uint16_t *)(dc_flash_ram + (addr&0x0001FFFF)) = (uint16_t)val;
678 asic_g2_write_word();
679 }
680 static void FASTCALL ext_flashram_write_byte( sh4addr_t addr, uint32_t val )
681 {
682 *(uint8_t *)(dc_flash_ram + (addr&0x0001FFFF)) = (uint8_t)val;
683 asic_g2_write_word();
684 }
685 static void FASTCALL ext_flashram_read_burst( unsigned char *dest, sh4addr_t addr )
686 {
687 memcpy( dest, dc_flash_ram+(addr&0x0001FFFF), 32 );
688 }
689 static void FASTCALL ext_flashram_write_burst( sh4addr_t addr, unsigned char *src )
690 {
691 memcpy( dc_flash_ram+(addr&0x0001FFFF), src, 32 );
692 }
694 struct mem_region_fn mem_region_flashram = { ext_flashram_read_long, ext_flashram_write_long,
695 ext_flashram_read_word, ext_flashram_write_word,
696 ext_flashram_read_byte, ext_flashram_write_byte,
697 ext_flashram_read_burst, ext_flashram_write_burst };
.