filename | src/dreamcast.c |
changeset | 669:ab344e42bca9 |
prev | 586:2a3ba82cf243 |
next | 671:a530ea88eebd |
author | nkeynes |
date | Mon May 12 10:00:13 2008 +0000 (14 years ago) |
permissions | -rw-r--r-- |
last change | Cleanup most of the -Wall warnings (getting a bit sloppy...) Convert FP code to use fixed banks rather than indirect pointer (3-4% faster this way now) |
file | annotate | diff | log | raw |
nkeynes@26 | 1 | /** |
nkeynes@586 | 2 | * $Id$ |
nkeynes@26 | 3 | * Central switchboard for the system. This pulls all the individual modules |
nkeynes@26 | 4 | * together into some kind of coherent structure. This is also where you'd |
nkeynes@26 | 5 | * add Naomi support, if I ever get a board to play with... |
nkeynes@26 | 6 | * |
nkeynes@26 | 7 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@26 | 8 | * |
nkeynes@26 | 9 | * This program is free software; you can redistribute it and/or modify |
nkeynes@26 | 10 | * it under the terms of the GNU General Public License as published by |
nkeynes@26 | 11 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@26 | 12 | * (at your option) any later version. |
nkeynes@26 | 13 | * |
nkeynes@26 | 14 | * This program is distributed in the hope that it will be useful, |
nkeynes@26 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@26 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@26 | 17 | * GNU General Public License for more details. |
nkeynes@26 | 18 | */ |
nkeynes@26 | 19 | |
nkeynes@18 | 20 | #include <errno.h> |
nkeynes@543 | 21 | #include <glib.h> |
nkeynes@669 | 22 | #include "lxdream.h" |
nkeynes@2 | 23 | #include "mem.h" |
nkeynes@669 | 24 | #include "dreamcast.h" |
nkeynes@669 | 25 | #include "asic.h" |
nkeynes@669 | 26 | #include "syscall.h" |
nkeynes@669 | 27 | #include "gui.h" |
nkeynes@11 | 28 | #include "aica/aica.h" |
nkeynes@25 | 29 | #include "gdrom/ide.h" |
nkeynes@25 | 30 | #include "maple/maple.h" |
nkeynes@669 | 31 | #include "sh4/sh4.h" |
nkeynes@586 | 32 | #include "sh4/sh4trans.h" |
nkeynes@15 | 33 | |
nkeynes@26 | 34 | /** |
nkeynes@26 | 35 | * Current state of the DC virtual machine |
nkeynes@26 | 36 | */ |
nkeynes@543 | 37 | typedef enum { STATE_UNINIT=0, STATE_RUNNING, |
nkeynes@543 | 38 | STATE_STOPPING, STATE_STOPPED } dreamcast_state_t; |
nkeynes@543 | 39 | |
nkeynes@543 | 40 | static volatile dreamcast_state_t dreamcast_state = STATE_UNINIT; |
nkeynes@543 | 41 | static gboolean dreamcast_has_bios = FALSE; |
nkeynes@543 | 42 | static gchar *dreamcast_program_name = NULL; |
nkeynes@543 | 43 | static sh4addr_t dreamcast_entry_point = 0xA0000000; |
nkeynes@26 | 44 | static uint32_t timeslice_length = DEFAULT_TIMESLICE_LENGTH; |
nkeynes@2 | 45 | |
nkeynes@15 | 46 | #define MAX_MODULES 32 |
nkeynes@15 | 47 | static int num_modules = 0; |
nkeynes@16 | 48 | dreamcast_module_t modules[MAX_MODULES]; |
nkeynes@15 | 49 | |
nkeynes@16 | 50 | /** |
nkeynes@35 | 51 | * The unknown module is used for logging files without an actual module |
nkeynes@35 | 52 | * declaration |
nkeynes@35 | 53 | */ |
nkeynes@35 | 54 | struct dreamcast_module unknown_module = { "****", NULL, NULL, NULL, NULL, |
nkeynes@35 | 55 | NULL, NULL, NULL }; |
nkeynes@35 | 56 | |
nkeynes@35 | 57 | /** |
nkeynes@16 | 58 | * This function is responsible for defining how all the pieces of the |
nkeynes@26 | 59 | * dreamcast actually fit together. |
nkeynes@16 | 60 | * |
nkeynes@16 | 61 | * Note currently the locations of the various MMIO pages are hard coded in |
nkeynes@16 | 62 | * the MMIO definitions - they should probably be moved here. |
nkeynes@16 | 63 | */ |
nkeynes@15 | 64 | void dreamcast_configure( ) |
nkeynes@15 | 65 | { |
nkeynes@265 | 66 | dreamcast_register_module( &eventq_module ); |
nkeynes@16 | 67 | /* Register the memory framework */ |
nkeynes@15 | 68 | dreamcast_register_module( &mem_module ); |
nkeynes@16 | 69 | |
nkeynes@16 | 70 | /* Setup standard memory map */ |
nkeynes@146 | 71 | mem_create_repeating_ram_region( 0x0C000000, 16 MB, MEM_REGION_MAIN, 0x01000000, 0x0F000000 ); |
nkeynes@16 | 72 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO ); |
nkeynes@16 | 73 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH ); |
nkeynes@16 | 74 | mem_create_ram_region( 0x05000000, 8 MB, MEM_REGION_VIDEO ); |
nkeynes@543 | 75 | dreamcast_has_bios = mem_load_rom( lxdream_get_config_value(CONFIG_BIOS_PATH), |
nkeynes@543 | 76 | 0x00000000, 0x00200000, 0x89f2b1a1, |
nkeynes@543 | 77 | MEM_REGION_BIOS ); |
nkeynes@146 | 78 | mem_create_ram_region( 0x00200000, 0x00020000, MEM_REGION_FLASH ); |
nkeynes@450 | 79 | mem_load_block( lxdream_get_config_value(CONFIG_FLASH_PATH), |
nkeynes@167 | 80 | 0x00200000, 0x00020000 ); |
nkeynes@16 | 81 | |
nkeynes@16 | 82 | /* Load in the rest of the core modules */ |
nkeynes@15 | 83 | dreamcast_register_module( &sh4_module ); |
nkeynes@15 | 84 | dreamcast_register_module( &asic_module ); |
nkeynes@15 | 85 | dreamcast_register_module( &pvr2_module ); |
nkeynes@15 | 86 | dreamcast_register_module( &aica_module ); |
nkeynes@15 | 87 | dreamcast_register_module( &maple_module ); |
nkeynes@15 | 88 | dreamcast_register_module( &ide_module ); |
nkeynes@15 | 89 | } |
nkeynes@15 | 90 | |
nkeynes@461 | 91 | void dreamcast_config_changed(void) |
nkeynes@461 | 92 | { |
nkeynes@543 | 93 | dreamcast_has_bios = mem_load_rom( lxdream_get_config_value(CONFIG_BIOS_PATH), |
nkeynes@543 | 94 | 0x00000000, 0x00200000, 0x89f2b1a1, |
nkeynes@543 | 95 | MEM_REGION_BIOS ); |
nkeynes@461 | 96 | mem_load_block( lxdream_get_config_value(CONFIG_FLASH_PATH), |
nkeynes@461 | 97 | 0x00200000, 0x00020000 ); |
nkeynes@461 | 98 | } |
nkeynes@461 | 99 | |
nkeynes@277 | 100 | void dreamcast_save_flash() |
nkeynes@277 | 101 | { |
nkeynes@450 | 102 | const char *file = lxdream_get_config_value(CONFIG_FLASH_PATH); |
nkeynes@277 | 103 | mem_save_block( file, 0x00200000, 0x00020000 ); |
nkeynes@277 | 104 | } |
nkeynes@277 | 105 | |
nkeynes@71 | 106 | /** |
nkeynes@71 | 107 | * Constructs a system configuration for the AICA in standalone mode, |
nkeynes@71 | 108 | * ie sound chip only. |
nkeynes@71 | 109 | */ |
nkeynes@71 | 110 | void dreamcast_configure_aica_only( ) |
nkeynes@71 | 111 | { |
nkeynes@71 | 112 | dreamcast_register_module( &mem_module ); |
nkeynes@71 | 113 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO ); |
nkeynes@71 | 114 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH ); |
nkeynes@71 | 115 | dreamcast_register_module( &aica_module ); |
nkeynes@89 | 116 | aica_enable(); |
nkeynes@71 | 117 | dreamcast_state = STATE_STOPPED; |
nkeynes@71 | 118 | } |
nkeynes@71 | 119 | |
nkeynes@15 | 120 | void dreamcast_register_module( dreamcast_module_t module ) |
nkeynes@15 | 121 | { |
nkeynes@15 | 122 | modules[num_modules++] = module; |
nkeynes@16 | 123 | if( module->init != NULL ) |
nkeynes@16 | 124 | module->init(); |
nkeynes@15 | 125 | } |
nkeynes@15 | 126 | |
nkeynes@15 | 127 | |
nkeynes@2 | 128 | void dreamcast_init( void ) |
nkeynes@2 | 129 | { |
nkeynes@15 | 130 | dreamcast_configure(); |
nkeynes@23 | 131 | dreamcast_state = STATE_STOPPED; |
nkeynes@2 | 132 | } |
nkeynes@2 | 133 | |
nkeynes@2 | 134 | void dreamcast_reset( void ) |
nkeynes@2 | 135 | { |
nkeynes@15 | 136 | int i; |
nkeynes@586 | 137 | if( sh4_xlat_is_running() ) { |
nkeynes@586 | 138 | sh4_translate_exit( XLAT_EXIT_SYSRESET ); |
nkeynes@586 | 139 | } |
nkeynes@15 | 140 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 141 | if( modules[i]->reset != NULL ) |
nkeynes@15 | 142 | modules[i]->reset(); |
nkeynes@15 | 143 | } |
nkeynes@2 | 144 | } |
nkeynes@2 | 145 | |
nkeynes@23 | 146 | void dreamcast_run( void ) |
nkeynes@15 | 147 | { |
nkeynes@15 | 148 | int i; |
nkeynes@23 | 149 | if( dreamcast_state != STATE_RUNNING ) { |
nkeynes@23 | 150 | for( i=0; i<num_modules; i++ ) { |
nkeynes@23 | 151 | if( modules[i]->start != NULL ) |
nkeynes@23 | 152 | modules[i]->start(); |
nkeynes@23 | 153 | } |
nkeynes@15 | 154 | } |
nkeynes@23 | 155 | dreamcast_state = STATE_RUNNING; |
nkeynes@23 | 156 | while( dreamcast_state == STATE_RUNNING ) { |
nkeynes@27 | 157 | int time_to_run = timeslice_length; |
nkeynes@23 | 158 | for( i=0; i<num_modules; i++ ) { |
nkeynes@23 | 159 | if( modules[i]->run_time_slice != NULL ) |
nkeynes@27 | 160 | time_to_run = modules[i]->run_time_slice( time_to_run ); |
nkeynes@23 | 161 | } |
nkeynes@23 | 162 | |
nkeynes@23 | 163 | } |
nkeynes@23 | 164 | |
nkeynes@15 | 165 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 166 | if( modules[i]->stop != NULL ) |
nkeynes@15 | 167 | modules[i]->stop(); |
nkeynes@15 | 168 | } |
nkeynes@23 | 169 | dreamcast_state = STATE_STOPPED; |
nkeynes@2 | 170 | } |
nkeynes@15 | 171 | |
nkeynes@372 | 172 | void dreamcast_run_for( unsigned int seconds, unsigned int nanosecs ) |
nkeynes@372 | 173 | { |
nkeynes@372 | 174 | |
nkeynes@372 | 175 | int i; |
nkeynes@372 | 176 | if( dreamcast_state != STATE_RUNNING ) { |
nkeynes@372 | 177 | for( i=0; i<num_modules; i++ ) { |
nkeynes@372 | 178 | if( modules[i]->start != NULL ) |
nkeynes@372 | 179 | modules[i]->start(); |
nkeynes@372 | 180 | } |
nkeynes@372 | 181 | } |
nkeynes@372 | 182 | dreamcast_state = STATE_RUNNING; |
nkeynes@372 | 183 | uint32_t nanos = 0; |
nkeynes@372 | 184 | if( nanosecs != 0 ) { |
nkeynes@372 | 185 | nanos = 1000000000 - nanosecs; |
nkeynes@372 | 186 | seconds++; |
nkeynes@372 | 187 | } |
nkeynes@372 | 188 | while( dreamcast_state == STATE_RUNNING && seconds != 0 ) { |
nkeynes@372 | 189 | int time_to_run = timeslice_length; |
nkeynes@372 | 190 | for( i=0; i<num_modules; i++ ) { |
nkeynes@372 | 191 | if( modules[i]->run_time_slice != NULL ) |
nkeynes@372 | 192 | time_to_run = modules[i]->run_time_slice( time_to_run ); |
nkeynes@372 | 193 | } |
nkeynes@372 | 194 | nanos += time_to_run; |
nkeynes@372 | 195 | if( nanos >= 1000000000 ) { |
nkeynes@372 | 196 | nanos -= 1000000000; |
nkeynes@372 | 197 | seconds--; |
nkeynes@372 | 198 | } |
nkeynes@372 | 199 | } |
nkeynes@372 | 200 | |
nkeynes@372 | 201 | for( i=0; i<num_modules; i++ ) { |
nkeynes@372 | 202 | if( modules[i]->stop != NULL ) |
nkeynes@372 | 203 | modules[i]->stop(); |
nkeynes@372 | 204 | } |
nkeynes@372 | 205 | dreamcast_state = STATE_STOPPED; |
nkeynes@372 | 206 | } |
nkeynes@372 | 207 | |
nkeynes@23 | 208 | void dreamcast_stop( void ) |
nkeynes@23 | 209 | { |
nkeynes@586 | 210 | if( sh4_xlat_is_running() ) { |
nkeynes@586 | 211 | sh4_translate_exit( XLAT_EXIT_HALT ); |
nkeynes@586 | 212 | } |
nkeynes@23 | 213 | if( dreamcast_state == STATE_RUNNING ) |
nkeynes@23 | 214 | dreamcast_state = STATE_STOPPING; |
nkeynes@23 | 215 | } |
nkeynes@17 | 216 | |
nkeynes@277 | 217 | void dreamcast_shutdown() |
nkeynes@277 | 218 | { |
nkeynes@277 | 219 | dreamcast_stop(); |
nkeynes@277 | 220 | dreamcast_save_flash(); |
nkeynes@277 | 221 | } |
nkeynes@277 | 222 | |
nkeynes@543 | 223 | void dreamcast_program_loaded( const gchar *name, sh4addr_t entry_point ) |
nkeynes@543 | 224 | { |
nkeynes@543 | 225 | if( dreamcast_program_name != NULL ) { |
nkeynes@543 | 226 | g_free(dreamcast_program_name); |
nkeynes@543 | 227 | } |
nkeynes@543 | 228 | dreamcast_program_name = g_strdup(name); |
nkeynes@543 | 229 | dreamcast_entry_point = entry_point; |
nkeynes@543 | 230 | sh4_set_pc(entry_point); |
nkeynes@586 | 231 | bios_install(); |
nkeynes@543 | 232 | dcload_install(); |
nkeynes@543 | 233 | gui_update_state(); |
nkeynes@543 | 234 | } |
nkeynes@543 | 235 | |
nkeynes@26 | 236 | gboolean dreamcast_is_running( void ) |
nkeynes@26 | 237 | { |
nkeynes@26 | 238 | return dreamcast_state == STATE_RUNNING; |
nkeynes@26 | 239 | } |
nkeynes@26 | 240 | |
nkeynes@543 | 241 | gboolean dreamcast_can_run(void) |
nkeynes@543 | 242 | { |
nkeynes@543 | 243 | return dreamcast_state != STATE_UNINIT && |
nkeynes@543 | 244 | (dreamcast_has_bios || dreamcast_program_name != NULL); |
nkeynes@543 | 245 | } |
nkeynes@543 | 246 | |
nkeynes@26 | 247 | /********************************* Save States *****************************/ |
nkeynes@26 | 248 | |
nkeynes@26 | 249 | struct save_state_header { |
nkeynes@26 | 250 | char magic[16]; |
nkeynes@26 | 251 | uint32_t version; |
nkeynes@26 | 252 | uint32_t module_count; |
nkeynes@26 | 253 | }; |
nkeynes@26 | 254 | |
nkeynes@477 | 255 | struct chunk_header { |
nkeynes@477 | 256 | char marker[4]; /* Always BLCK */ |
nkeynes@477 | 257 | char name[8]; /* Block (module) name */ |
nkeynes@477 | 258 | uint32_t block_length; |
nkeynes@477 | 259 | }; |
nkeynes@477 | 260 | |
nkeynes@477 | 261 | /** |
nkeynes@477 | 262 | * Check the save state header to ensure that it is a valid, supported |
nkeynes@477 | 263 | * file. |
nkeynes@477 | 264 | * @return the number of blocks following, or 0 if the file is invalid. |
nkeynes@477 | 265 | */ |
nkeynes@477 | 266 | int dreamcast_read_save_state_header( FILE *f ) |
nkeynes@477 | 267 | { |
nkeynes@477 | 268 | struct save_state_header header; |
nkeynes@477 | 269 | if( fread( &header, sizeof(header), 1, f ) != 1 ) { |
nkeynes@477 | 270 | return 0; |
nkeynes@477 | 271 | } |
nkeynes@477 | 272 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) { |
nkeynes@477 | 273 | ERROR( "Not a %s save state file", APP_NAME ); |
nkeynes@477 | 274 | return 0; |
nkeynes@477 | 275 | } |
nkeynes@477 | 276 | if( header.version != DREAMCAST_SAVE_VERSION ) { |
nkeynes@477 | 277 | ERROR( "%s save state version not supported", APP_NAME ); |
nkeynes@477 | 278 | return 0; |
nkeynes@477 | 279 | } |
nkeynes@477 | 280 | if( header.module_count > MAX_MODULES ) { |
nkeynes@477 | 281 | ERROR( "%s save state is corrupted (bad module count)", APP_NAME ); |
nkeynes@477 | 282 | return 0; |
nkeynes@477 | 283 | } |
nkeynes@477 | 284 | return header.module_count; |
nkeynes@477 | 285 | } |
nkeynes@477 | 286 | |
nkeynes@477 | 287 | int dreamcast_write_chunk_header( const gchar *name, uint32_t length, FILE *f ) |
nkeynes@477 | 288 | { |
nkeynes@477 | 289 | struct chunk_header head; |
nkeynes@477 | 290 | |
nkeynes@477 | 291 | memcpy( head.marker, "BLCK", 4 ); |
nkeynes@477 | 292 | memset( head.name, 0, 8 ); |
nkeynes@477 | 293 | memcpy( head.name, name, strlen(name) ); |
nkeynes@477 | 294 | head.block_length = length; |
nkeynes@477 | 295 | return fwrite( &head, sizeof(head), 1, f ); |
nkeynes@477 | 296 | } |
nkeynes@477 | 297 | |
nkeynes@477 | 298 | |
nkeynes@477 | 299 | frame_buffer_t dreamcast_load_preview( const gchar *filename ) |
nkeynes@477 | 300 | { |
nkeynes@477 | 301 | int i; |
nkeynes@477 | 302 | FILE *f = fopen( filename, "r" ); |
nkeynes@477 | 303 | if( f == NULL ) return NULL; |
nkeynes@477 | 304 | |
nkeynes@477 | 305 | int module_count = dreamcast_read_save_state_header(f); |
nkeynes@477 | 306 | if( module_count <= 0 ) { |
nkeynes@477 | 307 | fclose(f); |
nkeynes@477 | 308 | return NULL; |
nkeynes@477 | 309 | } |
nkeynes@477 | 310 | for( i=0; i<module_count; i++ ) { |
nkeynes@477 | 311 | struct chunk_header head; |
nkeynes@477 | 312 | if( fread( &head, sizeof(head), 1, f ) != 1 ) { |
nkeynes@477 | 313 | fclose(f); |
nkeynes@477 | 314 | return NULL; |
nkeynes@477 | 315 | } |
nkeynes@477 | 316 | if( memcmp("BLCK", head.marker, 4) != 0 ) { |
nkeynes@477 | 317 | fclose(f); |
nkeynes@477 | 318 | return NULL; |
nkeynes@477 | 319 | } |
nkeynes@477 | 320 | |
nkeynes@477 | 321 | if( strcmp("PVR2", head.name) == 0 ) { |
nkeynes@477 | 322 | uint32_t buf_count; |
nkeynes@477 | 323 | int has_front; |
nkeynes@477 | 324 | fread( &buf_count, sizeof(buf_count), 1, f ); |
nkeynes@477 | 325 | fread( &has_front, sizeof(has_front), 1, f ); |
nkeynes@477 | 326 | if( buf_count != 0 && has_front ) { |
nkeynes@477 | 327 | frame_buffer_t result = read_png_from_stream(f); |
nkeynes@477 | 328 | fclose(f); |
nkeynes@477 | 329 | return result; |
nkeynes@477 | 330 | } |
nkeynes@477 | 331 | break; |
nkeynes@477 | 332 | } else { |
nkeynes@477 | 333 | fseek( f, head.block_length, SEEK_CUR ); |
nkeynes@477 | 334 | } |
nkeynes@477 | 335 | } |
nkeynes@477 | 336 | return NULL; |
nkeynes@477 | 337 | } |
nkeynes@477 | 338 | |
nkeynes@18 | 339 | int dreamcast_load_state( const gchar *filename ) |
nkeynes@15 | 340 | { |
nkeynes@17 | 341 | int i,j; |
nkeynes@477 | 342 | int module_count; |
nkeynes@17 | 343 | int have_read[MAX_MODULES]; |
nkeynes@18 | 344 | |
nkeynes@477 | 345 | FILE *f = fopen( filename, "r" ); |
nkeynes@18 | 346 | if( f == NULL ) return errno; |
nkeynes@15 | 347 | |
nkeynes@477 | 348 | module_count = dreamcast_read_save_state_header(f); |
nkeynes@477 | 349 | if( module_count <= 0 ) { |
nkeynes@477 | 350 | fclose(f); |
nkeynes@17 | 351 | return 1; |
nkeynes@15 | 352 | } |
nkeynes@477 | 353 | |
nkeynes@17 | 354 | for( i=0; i<MAX_MODULES; i++ ) { |
nkeynes@17 | 355 | have_read[i] = 0; |
nkeynes@15 | 356 | } |
nkeynes@15 | 357 | |
nkeynes@477 | 358 | for( i=0; i<module_count; i++ ) { |
nkeynes@477 | 359 | struct chunk_header chunk; |
nkeynes@477 | 360 | fread( &chunk, sizeof(chunk), 1, f ); |
nkeynes@477 | 361 | if( strncmp(chunk.marker, "BLCK", 4) != 0 ) { |
nkeynes@180 | 362 | ERROR( "%s save state is corrupted (missing block header %d)", APP_NAME, i ); |
nkeynes@477 | 363 | fclose(f); |
nkeynes@17 | 364 | return 2; |
nkeynes@17 | 365 | } |
nkeynes@17 | 366 | |
nkeynes@17 | 367 | /* Find the matching module by name */ |
nkeynes@17 | 368 | for( j=0; j<num_modules; j++ ) { |
nkeynes@477 | 369 | if( strcmp(modules[j]->name,chunk.name) == 0 ) { |
nkeynes@17 | 370 | have_read[j] = 1; |
nkeynes@17 | 371 | if( modules[j]->load == NULL ) { |
nkeynes@180 | 372 | ERROR( "%s save state is corrupted (no loader for %s)", APP_NAME, modules[j]->name ); |
nkeynes@477 | 373 | fclose(f); |
nkeynes@17 | 374 | return 2; |
nkeynes@17 | 375 | } else if( modules[j]->load(f) != 0 ) { |
nkeynes@180 | 376 | ERROR( "%s save state is corrupted (%s failed)", APP_NAME, modules[j]->name ); |
nkeynes@477 | 377 | fclose(f); |
nkeynes@17 | 378 | return 2; |
nkeynes@17 | 379 | } |
nkeynes@17 | 380 | break; |
nkeynes@17 | 381 | } |
nkeynes@17 | 382 | } |
nkeynes@17 | 383 | if( j == num_modules ) { |
nkeynes@477 | 384 | fclose(f); |
nkeynes@180 | 385 | ERROR( "%s save state contains unrecognized section", APP_NAME ); |
nkeynes@17 | 386 | return 2; |
nkeynes@17 | 387 | } |
nkeynes@17 | 388 | } |
nkeynes@17 | 389 | |
nkeynes@17 | 390 | /* Any modules that we didn't load - reset to the default state. |
nkeynes@17 | 391 | * (ie it's not an error to skip a module if you don't actually |
nkeynes@17 | 392 | * care about its state). |
nkeynes@17 | 393 | */ |
nkeynes@17 | 394 | for( j=0; j<num_modules; j++ ) { |
nkeynes@17 | 395 | if( have_read[j] == 0 && modules[j]->reset != NULL ) { |
nkeynes@17 | 396 | modules[j]->reset(); |
nkeynes@17 | 397 | } |
nkeynes@15 | 398 | } |
nkeynes@18 | 399 | fclose(f); |
nkeynes@18 | 400 | INFO( "Save state read from %s", filename ); |
nkeynes@422 | 401 | return 0; |
nkeynes@15 | 402 | } |
nkeynes@15 | 403 | |
nkeynes@18 | 404 | int dreamcast_save_state( const gchar *filename ) |
nkeynes@15 | 405 | { |
nkeynes@15 | 406 | int i; |
nkeynes@18 | 407 | FILE *f; |
nkeynes@15 | 408 | struct save_state_header header; |
nkeynes@15 | 409 | |
nkeynes@18 | 410 | f = fopen( filename, "w" ); |
nkeynes@18 | 411 | if( f == NULL ) |
nkeynes@18 | 412 | return errno; |
nkeynes@15 | 413 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC ); |
nkeynes@15 | 414 | header.version = DREAMCAST_SAVE_VERSION; |
nkeynes@18 | 415 | header.module_count = 0; |
nkeynes@18 | 416 | |
nkeynes@18 | 417 | for( i=0; i<num_modules; i++ ) { |
nkeynes@18 | 418 | if( modules[i]->save != NULL ) |
nkeynes@18 | 419 | header.module_count++; |
nkeynes@18 | 420 | } |
nkeynes@15 | 421 | fwrite( &header, sizeof(header), 1, f ); |
nkeynes@15 | 422 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 423 | if( modules[i]->save != NULL ) { |
nkeynes@477 | 424 | uint32_t blocklen, posn1, posn2; |
nkeynes@477 | 425 | dreamcast_write_chunk_header( modules[i]->name, 0, f ); |
nkeynes@477 | 426 | posn1 = ftell(f); |
nkeynes@15 | 427 | modules[i]->save(f); |
nkeynes@477 | 428 | posn2 = ftell(f); |
nkeynes@477 | 429 | blocklen = posn2 - posn1; |
nkeynes@477 | 430 | fseek( f, posn1-4, SEEK_SET ); |
nkeynes@477 | 431 | fwrite( &blocklen, sizeof(blocklen), 1, f ); |
nkeynes@477 | 432 | fseek( f, posn2, SEEK_SET ); |
nkeynes@15 | 433 | } |
nkeynes@15 | 434 | } |
nkeynes@18 | 435 | fclose( f ); |
nkeynes@18 | 436 | INFO( "Save state written to %s", filename ); |
nkeynes@422 | 437 | return 0; |
nkeynes@15 | 438 | } |
nkeynes@15 | 439 |
.