filename | src/dreamcast.c |
changeset | 953:f4a156508ad1 |
prev | 892:126aa7db6162 |
next | 1034:7044e01148f0 |
author | nkeynes |
date | Sat Jun 13 07:12:51 2009 +0000 (14 years ago) |
permissions | -rw-r--r-- |
last change | Load plugins from the directory containing the executable first if they're there - simplifies development testing. Add dummy plugin for easy identification of the plugin directory |
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@740 | 23 | #include "dream.h" |
nkeynes@2 | 24 | #include "mem.h" |
nkeynes@669 | 25 | #include "dreamcast.h" |
nkeynes@669 | 26 | #include "asic.h" |
nkeynes@669 | 27 | #include "syscall.h" |
nkeynes@669 | 28 | #include "gui.h" |
nkeynes@11 | 29 | #include "aica/aica.h" |
nkeynes@25 | 30 | #include "gdrom/ide.h" |
nkeynes@25 | 31 | #include "maple/maple.h" |
nkeynes@953 | 32 | #include "pvr2/pvr2.h" |
nkeynes@669 | 33 | #include "sh4/sh4.h" |
nkeynes@740 | 34 | #include "sh4/sh4core.h" |
nkeynes@15 | 35 | |
nkeynes@26 | 36 | /** |
nkeynes@26 | 37 | * Current state of the DC virtual machine |
nkeynes@26 | 38 | */ |
nkeynes@543 | 39 | typedef enum { STATE_UNINIT=0, STATE_RUNNING, |
nkeynes@736 | 40 | STATE_STOPPING, STATE_STOPPED } dreamcast_state_t; |
nkeynes@736 | 41 | |
nkeynes@543 | 42 | static volatile dreamcast_state_t dreamcast_state = STATE_UNINIT; |
nkeynes@543 | 43 | static gboolean dreamcast_has_bios = FALSE; |
nkeynes@742 | 44 | static gboolean dreamcast_has_flash = FALSE; |
nkeynes@689 | 45 | static gboolean dreamcast_exit_on_stop = FALSE; |
nkeynes@543 | 46 | static gchar *dreamcast_program_name = NULL; |
nkeynes@543 | 47 | static sh4addr_t dreamcast_entry_point = 0xA0000000; |
nkeynes@26 | 48 | static uint32_t timeslice_length = DEFAULT_TIMESLICE_LENGTH; |
nkeynes@689 | 49 | static uint64_t run_time_nanosecs = 0; |
nkeynes@2 | 50 | |
nkeynes@15 | 51 | #define MAX_MODULES 32 |
nkeynes@15 | 52 | static int num_modules = 0; |
nkeynes@16 | 53 | dreamcast_module_t modules[MAX_MODULES]; |
nkeynes@15 | 54 | |
nkeynes@16 | 55 | /** |
nkeynes@35 | 56 | * The unknown module is used for logging files without an actual module |
nkeynes@35 | 57 | * declaration |
nkeynes@35 | 58 | */ |
nkeynes@35 | 59 | struct dreamcast_module unknown_module = { "****", NULL, NULL, NULL, NULL, |
nkeynes@736 | 60 | NULL, NULL, NULL }; |
nkeynes@35 | 61 | |
nkeynes@953 | 62 | extern struct mem_region_fn mem_region_sdram; |
nkeynes@953 | 63 | extern struct mem_region_fn mem_region_vram32; |
nkeynes@953 | 64 | extern struct mem_region_fn mem_region_vram64; |
nkeynes@953 | 65 | extern struct mem_region_fn mem_region_audioram; |
nkeynes@953 | 66 | extern struct mem_region_fn mem_region_audioscratch; |
nkeynes@953 | 67 | extern struct mem_region_fn mem_region_flashram; |
nkeynes@953 | 68 | extern struct mem_region_fn mem_region_bootrom; |
nkeynes@953 | 69 | extern struct mem_region_fn mem_region_pvr2ta; |
nkeynes@953 | 70 | extern struct mem_region_fn mem_region_pvr2yuv; |
nkeynes@953 | 71 | extern struct mem_region_fn mem_region_pvr2vdma1; |
nkeynes@953 | 72 | extern struct mem_region_fn mem_region_pvr2vdma2; |
nkeynes@953 | 73 | |
nkeynes@953 | 74 | unsigned char dc_main_ram[16 MB]; |
nkeynes@953 | 75 | unsigned char dc_boot_rom[2 MB]; |
nkeynes@953 | 76 | unsigned char dc_flash_ram[128 KB]; |
nkeynes@953 | 77 | |
nkeynes@35 | 78 | /** |
nkeynes@16 | 79 | * This function is responsible for defining how all the pieces of the |
nkeynes@26 | 80 | * dreamcast actually fit together. |
nkeynes@16 | 81 | * |
nkeynes@16 | 82 | * Note currently the locations of the various MMIO pages are hard coded in |
nkeynes@16 | 83 | * the MMIO definitions - they should probably be moved here. |
nkeynes@16 | 84 | */ |
nkeynes@15 | 85 | void dreamcast_configure( ) |
nkeynes@15 | 86 | { |
nkeynes@825 | 87 | const char *bios_path = lxdream_get_config_value(CONFIG_BIOS_PATH); |
nkeynes@825 | 88 | const char *flash_path = lxdream_get_config_value(CONFIG_FLASH_PATH); |
nkeynes@825 | 89 | |
nkeynes@265 | 90 | dreamcast_register_module( &eventq_module ); |
nkeynes@16 | 91 | /* Register the memory framework */ |
nkeynes@15 | 92 | dreamcast_register_module( &mem_module ); |
nkeynes@16 | 93 | |
nkeynes@16 | 94 | /* Setup standard memory map */ |
nkeynes@953 | 95 | mem_map_region( dc_boot_rom, 0x00000000, 2 MB, MEM_REGION_BIOS, &mem_region_bootrom, MEM_FLAG_ROM, 2 MB, 0 ); |
nkeynes@953 | 96 | mem_map_region( dc_flash_ram, 0x00200000, 128 KB, MEM_REGION_FLASH, &mem_region_flashram, MEM_FLAG_RAM, 128 KB, 0 ); |
nkeynes@953 | 97 | mem_map_region( aica_main_ram, 0x00800000, 2 MB, MEM_REGION_AUDIO, &mem_region_audioram, MEM_FLAG_RAM, 2 MB, 0 ); |
nkeynes@953 | 98 | mem_map_region( aica_scratch_ram,0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH,&mem_region_audioscratch, MEM_FLAG_RAM, 8 KB, 0 ); |
nkeynes@953 | 99 | mem_map_region( NULL, 0x04000000, 8 MB, MEM_REGION_VIDEO64, &mem_region_vram64, 0, 8 MB, 0 ); |
nkeynes@953 | 100 | mem_map_region( pvr2_main_ram, 0x05000000, 8 MB, MEM_REGION_VIDEO, &mem_region_vram32, MEM_FLAG_RAM, 8 MB, 0 ); |
nkeynes@953 | 101 | mem_map_region( dc_main_ram, 0x0C000000, 16 MB, MEM_REGION_MAIN, &mem_region_sdram, MEM_FLAG_RAM, 0x01000000, 0x0F000000 ); |
nkeynes@953 | 102 | mem_map_region( NULL, 0x10000000, 8 MB, MEM_REGION_PVR2TA, &mem_region_pvr2ta, 0, 0x02000000, 0x12000000 ); |
nkeynes@953 | 103 | mem_map_region( NULL, 0x10800000, 8 MB, MEM_REGION_PVR2YUV, &mem_region_pvr2yuv, 0, 0x02000000, 0x12800000 ); |
nkeynes@953 | 104 | mem_map_region( NULL, 0x11000000, 16 MB, MEM_REGION_PVR2VDMA1, &mem_region_pvr2vdma1, 0, 16 MB, 0 ); |
nkeynes@953 | 105 | mem_map_region( NULL, 0x13000000, 16 MB, MEM_REGION_PVR2VDMA2, &mem_region_pvr2vdma2, 0, 16 MB, 0 ); |
nkeynes@953 | 106 | |
nkeynes@953 | 107 | dreamcast_has_bios = mem_load_rom( dc_boot_rom, bios_path, 2 MB, 0x89f2b1a1 ); |
nkeynes@825 | 108 | if( flash_path != NULL && flash_path[0] != '\0' ) { |
nkeynes@825 | 109 | mem_load_block( flash_path, 0x00200000, 0x00020000 ); |
nkeynes@825 | 110 | } |
nkeynes@742 | 111 | dreamcast_has_flash = TRUE; |
nkeynes@16 | 112 | |
nkeynes@16 | 113 | /* Load in the rest of the core modules */ |
nkeynes@15 | 114 | dreamcast_register_module( &sh4_module ); |
nkeynes@15 | 115 | dreamcast_register_module( &asic_module ); |
nkeynes@15 | 116 | dreamcast_register_module( &pvr2_module ); |
nkeynes@15 | 117 | dreamcast_register_module( &aica_module ); |
nkeynes@15 | 118 | dreamcast_register_module( &maple_module ); |
nkeynes@15 | 119 | dreamcast_register_module( &ide_module ); |
nkeynes@15 | 120 | } |
nkeynes@15 | 121 | |
nkeynes@461 | 122 | void dreamcast_config_changed(void) |
nkeynes@461 | 123 | { |
nkeynes@825 | 124 | const char *bios_path = lxdream_get_config_value(CONFIG_BIOS_PATH); |
nkeynes@825 | 125 | const char *flash_path = lxdream_get_config_value(CONFIG_FLASH_PATH); |
nkeynes@953 | 126 | dreamcast_has_bios = mem_load_rom( dc_boot_rom, bios_path, 2 MB, 0x89f2b1a1 ); |
nkeynes@825 | 127 | if( flash_path != NULL && flash_path[0] != '\0' ) { |
nkeynes@825 | 128 | mem_load_block( flash_path, 0x00200000, 0x00020000 ); |
nkeynes@825 | 129 | } |
nkeynes@461 | 130 | } |
nkeynes@461 | 131 | |
nkeynes@277 | 132 | void dreamcast_save_flash() |
nkeynes@277 | 133 | { |
nkeynes@742 | 134 | if( dreamcast_has_flash ) { |
nkeynes@742 | 135 | const char *file = lxdream_get_config_value(CONFIG_FLASH_PATH); |
nkeynes@742 | 136 | mem_save_block( file, 0x00200000, 0x00020000 ); |
nkeynes@742 | 137 | } |
nkeynes@277 | 138 | } |
nkeynes@277 | 139 | |
nkeynes@71 | 140 | /** |
nkeynes@71 | 141 | * Constructs a system configuration for the AICA in standalone mode, |
nkeynes@71 | 142 | * ie sound chip only. |
nkeynes@71 | 143 | */ |
nkeynes@71 | 144 | void dreamcast_configure_aica_only( ) |
nkeynes@71 | 145 | { |
nkeynes@71 | 146 | dreamcast_register_module( &mem_module ); |
nkeynes@953 | 147 | mem_map_region( aica_main_ram, 0x00800000, 2 MB, MEM_REGION_AUDIO, &mem_region_audioram, MEM_FLAG_RAM, 2 MB, 0 ); |
nkeynes@953 | 148 | mem_map_region( aica_scratch_ram, 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH, &mem_region_audioscratch, MEM_FLAG_RAM, 8 KB, 0 ); |
nkeynes@71 | 149 | dreamcast_register_module( &aica_module ); |
nkeynes@89 | 150 | aica_enable(); |
nkeynes@71 | 151 | dreamcast_state = STATE_STOPPED; |
nkeynes@71 | 152 | } |
nkeynes@71 | 153 | |
nkeynes@15 | 154 | void dreamcast_register_module( dreamcast_module_t module ) |
nkeynes@15 | 155 | { |
nkeynes@15 | 156 | modules[num_modules++] = module; |
nkeynes@16 | 157 | if( module->init != NULL ) |
nkeynes@736 | 158 | module->init(); |
nkeynes@15 | 159 | } |
nkeynes@15 | 160 | |
nkeynes@689 | 161 | void dreamcast_set_run_time( uint32_t secs, uint32_t nanosecs ) |
nkeynes@689 | 162 | { |
nkeynes@689 | 163 | run_time_nanosecs = (((uint64_t)secs) * 1000000000) + nanosecs; |
nkeynes@689 | 164 | } |
nkeynes@689 | 165 | |
nkeynes@689 | 166 | void dreamcast_set_exit_on_stop( gboolean flag ) |
nkeynes@689 | 167 | { |
nkeynes@689 | 168 | dreamcast_exit_on_stop = flag; |
nkeynes@689 | 169 | } |
nkeynes@15 | 170 | |
nkeynes@2 | 171 | void dreamcast_init( void ) |
nkeynes@2 | 172 | { |
nkeynes@15 | 173 | dreamcast_configure(); |
nkeynes@23 | 174 | dreamcast_state = STATE_STOPPED; |
nkeynes@2 | 175 | } |
nkeynes@2 | 176 | |
nkeynes@2 | 177 | void dreamcast_reset( void ) |
nkeynes@2 | 178 | { |
nkeynes@766 | 179 | sh4_core_exit(CORE_EXIT_SYSRESET); |
nkeynes@15 | 180 | int i; |
nkeynes@15 | 181 | for( i=0; i<num_modules; i++ ) { |
nkeynes@736 | 182 | if( modules[i]->reset != NULL ) |
nkeynes@736 | 183 | modules[i]->reset(); |
nkeynes@15 | 184 | } |
nkeynes@2 | 185 | } |
nkeynes@2 | 186 | |
nkeynes@23 | 187 | void dreamcast_run( void ) |
nkeynes@15 | 188 | { |
nkeynes@15 | 189 | int i; |
nkeynes@889 | 190 | |
nkeynes@889 | 191 | if( !dreamcast_can_run() ) { |
nkeynes@889 | 192 | 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")); |
nkeynes@889 | 193 | return; |
nkeynes@889 | 194 | } |
nkeynes@889 | 195 | |
nkeynes@23 | 196 | if( dreamcast_state != STATE_RUNNING ) { |
nkeynes@689 | 197 | for( i=0; i<num_modules; i++ ) { |
nkeynes@689 | 198 | if( modules[i]->start != NULL ) |
nkeynes@689 | 199 | modules[i]->start(); |
nkeynes@689 | 200 | } |
nkeynes@15 | 201 | } |
nkeynes@839 | 202 | |
nkeynes@839 | 203 | if( maple_should_grab() ) { |
nkeynes@839 | 204 | gui_set_use_grab(TRUE); |
nkeynes@839 | 205 | } |
nkeynes@736 | 206 | |
nkeynes@23 | 207 | dreamcast_state = STATE_RUNNING; |
nkeynes@736 | 208 | |
nkeynes@689 | 209 | if( run_time_nanosecs != 0 ) { |
nkeynes@689 | 210 | while( dreamcast_state == STATE_RUNNING ) { |
nkeynes@689 | 211 | uint32_t time_to_run = timeslice_length; |
nkeynes@689 | 212 | if( run_time_nanosecs < time_to_run ) { |
nkeynes@689 | 213 | time_to_run = (uint32_t)run_time_nanosecs; |
nkeynes@689 | 214 | } |
nkeynes@736 | 215 | |
nkeynes@689 | 216 | for( i=0; i<num_modules; i++ ) { |
nkeynes@689 | 217 | if( modules[i]->run_time_slice != NULL ) |
nkeynes@689 | 218 | time_to_run = modules[i]->run_time_slice( time_to_run ); |
nkeynes@689 | 219 | } |
nkeynes@736 | 220 | |
nkeynes@689 | 221 | if( run_time_nanosecs > time_to_run ) { |
nkeynes@689 | 222 | run_time_nanosecs -= time_to_run; |
nkeynes@689 | 223 | } else { |
nkeynes@689 | 224 | run_time_nanosecs = 0; // Finished |
nkeynes@689 | 225 | break; |
nkeynes@689 | 226 | } |
nkeynes@689 | 227 | } |
nkeynes@689 | 228 | } else { |
nkeynes@689 | 229 | while( dreamcast_state == STATE_RUNNING ) { |
nkeynes@689 | 230 | int time_to_run = timeslice_length; |
nkeynes@689 | 231 | for( i=0; i<num_modules; i++ ) { |
nkeynes@689 | 232 | if( modules[i]->run_time_slice != NULL ) |
nkeynes@689 | 233 | time_to_run = modules[i]->run_time_slice( time_to_run ); |
nkeynes@689 | 234 | } |
nkeynes@23 | 235 | |
nkeynes@689 | 236 | } |
nkeynes@23 | 237 | } |
nkeynes@23 | 238 | |
nkeynes@839 | 239 | gui_set_use_grab(FALSE); |
nkeynes@839 | 240 | |
nkeynes@15 | 241 | for( i=0; i<num_modules; i++ ) { |
nkeynes@689 | 242 | if( modules[i]->stop != NULL ) |
nkeynes@689 | 243 | modules[i]->stop(); |
nkeynes@15 | 244 | } |
nkeynes@23 | 245 | dreamcast_state = STATE_STOPPED; |
nkeynes@736 | 246 | |
nkeynes@689 | 247 | if( dreamcast_exit_on_stop ) { |
nkeynes@689 | 248 | dreamcast_shutdown(); |
nkeynes@689 | 249 | exit(0); |
nkeynes@372 | 250 | } |
nkeynes@372 | 251 | } |
nkeynes@372 | 252 | |
nkeynes@23 | 253 | void dreamcast_stop( void ) |
nkeynes@23 | 254 | { |
nkeynes@740 | 255 | sh4_core_exit(CORE_EXIT_HALT); // returns only if not inside SH4 core |
nkeynes@23 | 256 | if( dreamcast_state == STATE_RUNNING ) |
nkeynes@736 | 257 | dreamcast_state = STATE_STOPPING; |
nkeynes@23 | 258 | } |
nkeynes@17 | 259 | |
nkeynes@277 | 260 | void dreamcast_shutdown() |
nkeynes@277 | 261 | { |
nkeynes@727 | 262 | // Don't do a dreamcast_stop - if we're calling this out of SH4 code, |
nkeynes@727 | 263 | // it's a shutdown-and-quit event |
nkeynes@727 | 264 | if( dreamcast_state == STATE_RUNNING ) |
nkeynes@727 | 265 | dreamcast_state = STATE_STOPPING; |
nkeynes@277 | 266 | dreamcast_save_flash(); |
nkeynes@671 | 267 | #ifdef ENABLE_SH4STATS |
nkeynes@671 | 268 | sh4_stats_print(stdout); |
nkeynes@671 | 269 | #endif |
nkeynes@277 | 270 | } |
nkeynes@277 | 271 | |
nkeynes@543 | 272 | void dreamcast_program_loaded( const gchar *name, sh4addr_t entry_point ) |
nkeynes@543 | 273 | { |
nkeynes@543 | 274 | if( dreamcast_program_name != NULL ) { |
nkeynes@543 | 275 | g_free(dreamcast_program_name); |
nkeynes@543 | 276 | } |
nkeynes@543 | 277 | dreamcast_program_name = g_strdup(name); |
nkeynes@543 | 278 | dreamcast_entry_point = entry_point; |
nkeynes@543 | 279 | sh4_set_pc(entry_point); |
nkeynes@953 | 280 | sh4_write_sr( sh4_read_sr() & (~SR_BL) ); /* Unmask interrupts */ |
nkeynes@586 | 281 | bios_install(); |
nkeynes@543 | 282 | dcload_install(); |
nkeynes@543 | 283 | gui_update_state(); |
nkeynes@543 | 284 | } |
nkeynes@543 | 285 | |
nkeynes@26 | 286 | gboolean dreamcast_is_running( void ) |
nkeynes@26 | 287 | { |
nkeynes@26 | 288 | return dreamcast_state == STATE_RUNNING; |
nkeynes@26 | 289 | } |
nkeynes@26 | 290 | |
nkeynes@543 | 291 | gboolean dreamcast_can_run(void) |
nkeynes@543 | 292 | { |
nkeynes@543 | 293 | return dreamcast_state != STATE_UNINIT && |
nkeynes@736 | 294 | (dreamcast_has_bios || dreamcast_program_name != NULL); |
nkeynes@543 | 295 | } |
nkeynes@543 | 296 | |
nkeynes@26 | 297 | /********************************* Save States *****************************/ |
nkeynes@26 | 298 | |
nkeynes@26 | 299 | struct save_state_header { |
nkeynes@26 | 300 | char magic[16]; |
nkeynes@26 | 301 | uint32_t version; |
nkeynes@26 | 302 | uint32_t module_count; |
nkeynes@26 | 303 | }; |
nkeynes@26 | 304 | |
nkeynes@477 | 305 | struct chunk_header { |
nkeynes@477 | 306 | char marker[4]; /* Always BLCK */ |
nkeynes@477 | 307 | char name[8]; /* Block (module) name */ |
nkeynes@477 | 308 | uint32_t block_length; |
nkeynes@477 | 309 | }; |
nkeynes@477 | 310 | |
nkeynes@477 | 311 | /** |
nkeynes@477 | 312 | * Check the save state header to ensure that it is a valid, supported |
nkeynes@477 | 313 | * file. |
nkeynes@477 | 314 | * @return the number of blocks following, or 0 if the file is invalid. |
nkeynes@477 | 315 | */ |
nkeynes@891 | 316 | int dreamcast_read_save_state_header( FILE *f, char *error, int errorlen ) |
nkeynes@477 | 317 | { |
nkeynes@477 | 318 | struct save_state_header header; |
nkeynes@477 | 319 | if( fread( &header, sizeof(header), 1, f ) != 1 ) { |
nkeynes@736 | 320 | return 0; |
nkeynes@477 | 321 | } |
nkeynes@477 | 322 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) { |
nkeynes@891 | 323 | if( error != NULL ) |
nkeynes@891 | 324 | snprintf( error, errorlen, _("File is not a %s save state"), APP_NAME ); |
nkeynes@736 | 325 | return 0; |
nkeynes@477 | 326 | } |
nkeynes@477 | 327 | if( header.version != DREAMCAST_SAVE_VERSION ) { |
nkeynes@891 | 328 | if( error != NULL ) |
nkeynes@892 | 329 | snprintf( error, errorlen, _("Unsupported %s save state version"), APP_NAME ); |
nkeynes@736 | 330 | return 0; |
nkeynes@477 | 331 | } |
nkeynes@477 | 332 | if( header.module_count > MAX_MODULES ) { |
nkeynes@891 | 333 | if( error != NULL ) |
nkeynes@891 | 334 | snprintf( error, errorlen, _("%s save state is corrupted (bad module count)"), APP_NAME ); |
nkeynes@736 | 335 | return 0; |
nkeynes@477 | 336 | } |
nkeynes@477 | 337 | return header.module_count; |
nkeynes@477 | 338 | } |
nkeynes@477 | 339 | |
nkeynes@477 | 340 | int dreamcast_write_chunk_header( const gchar *name, uint32_t length, FILE *f ) |
nkeynes@477 | 341 | { |
nkeynes@477 | 342 | struct chunk_header head; |
nkeynes@477 | 343 | |
nkeynes@477 | 344 | memcpy( head.marker, "BLCK", 4 ); |
nkeynes@477 | 345 | memset( head.name, 0, 8 ); |
nkeynes@477 | 346 | memcpy( head.name, name, strlen(name) ); |
nkeynes@477 | 347 | head.block_length = length; |
nkeynes@477 | 348 | return fwrite( &head, sizeof(head), 1, f ); |
nkeynes@477 | 349 | } |
nkeynes@477 | 350 | |
nkeynes@477 | 351 | |
nkeynes@477 | 352 | frame_buffer_t dreamcast_load_preview( const gchar *filename ) |
nkeynes@477 | 353 | { |
nkeynes@477 | 354 | int i; |
nkeynes@477 | 355 | FILE *f = fopen( filename, "r" ); |
nkeynes@477 | 356 | if( f == NULL ) return NULL; |
nkeynes@736 | 357 | |
nkeynes@891 | 358 | int module_count = dreamcast_read_save_state_header(f, NULL, 0); |
nkeynes@477 | 359 | if( module_count <= 0 ) { |
nkeynes@736 | 360 | fclose(f); |
nkeynes@736 | 361 | return NULL; |
nkeynes@477 | 362 | } |
nkeynes@477 | 363 | for( i=0; i<module_count; i++ ) { |
nkeynes@736 | 364 | struct chunk_header head; |
nkeynes@736 | 365 | if( fread( &head, sizeof(head), 1, f ) != 1 ) { |
nkeynes@736 | 366 | fclose(f); |
nkeynes@736 | 367 | return NULL; |
nkeynes@736 | 368 | } |
nkeynes@736 | 369 | if( memcmp("BLCK", head.marker, 4) != 0 ) { |
nkeynes@736 | 370 | fclose(f); |
nkeynes@736 | 371 | return NULL; |
nkeynes@736 | 372 | } |
nkeynes@477 | 373 | |
nkeynes@736 | 374 | if( strcmp("PVR2", head.name) == 0 ) { |
nkeynes@736 | 375 | uint32_t buf_count; |
nkeynes@736 | 376 | int has_front; |
nkeynes@736 | 377 | fread( &buf_count, sizeof(buf_count), 1, f ); |
nkeynes@736 | 378 | fread( &has_front, sizeof(has_front), 1, f ); |
nkeynes@736 | 379 | if( buf_count != 0 && has_front ) { |
nkeynes@736 | 380 | frame_buffer_t result = read_png_from_stream(f); |
nkeynes@736 | 381 | fclose(f); |
nkeynes@736 | 382 | return result; |
nkeynes@736 | 383 | } |
nkeynes@736 | 384 | break; |
nkeynes@736 | 385 | } else { |
nkeynes@736 | 386 | fseek( f, head.block_length, SEEK_CUR ); |
nkeynes@736 | 387 | } |
nkeynes@477 | 388 | } |
nkeynes@477 | 389 | return NULL; |
nkeynes@477 | 390 | } |
nkeynes@477 | 391 | |
nkeynes@18 | 392 | int dreamcast_load_state( const gchar *filename ) |
nkeynes@15 | 393 | { |
nkeynes@17 | 394 | int i,j; |
nkeynes@477 | 395 | int module_count; |
nkeynes@891 | 396 | char error[128]; |
nkeynes@17 | 397 | int have_read[MAX_MODULES]; |
nkeynes@18 | 398 | |
nkeynes@477 | 399 | FILE *f = fopen( filename, "r" ); |
nkeynes@18 | 400 | if( f == NULL ) return errno; |
nkeynes@15 | 401 | |
nkeynes@891 | 402 | module_count = dreamcast_read_save_state_header(f, error, sizeof(error)); |
nkeynes@477 | 403 | if( module_count <= 0 ) { |
nkeynes@891 | 404 | ERROR( error ); |
nkeynes@736 | 405 | fclose(f); |
nkeynes@736 | 406 | return 1; |
nkeynes@15 | 407 | } |
nkeynes@477 | 408 | |
nkeynes@17 | 409 | for( i=0; i<MAX_MODULES; i++ ) { |
nkeynes@736 | 410 | have_read[i] = 0; |
nkeynes@15 | 411 | } |
nkeynes@15 | 412 | |
nkeynes@477 | 413 | for( i=0; i<module_count; i++ ) { |
nkeynes@736 | 414 | struct chunk_header chunk; |
nkeynes@736 | 415 | fread( &chunk, sizeof(chunk), 1, f ); |
nkeynes@736 | 416 | if( strncmp(chunk.marker, "BLCK", 4) != 0 ) { |
nkeynes@736 | 417 | ERROR( "%s save state is corrupted (missing block header %d)", APP_NAME, i ); |
nkeynes@736 | 418 | fclose(f); |
nkeynes@736 | 419 | return 2; |
nkeynes@736 | 420 | } |
nkeynes@736 | 421 | |
nkeynes@736 | 422 | /* Find the matching module by name */ |
nkeynes@736 | 423 | for( j=0; j<num_modules; j++ ) { |
nkeynes@736 | 424 | if( strcmp(modules[j]->name,chunk.name) == 0 ) { |
nkeynes@736 | 425 | have_read[j] = 1; |
nkeynes@736 | 426 | if( modules[j]->load == NULL ) { |
nkeynes@736 | 427 | ERROR( "%s save state is corrupted (no loader for %s)", APP_NAME, modules[j]->name ); |
nkeynes@736 | 428 | fclose(f); |
nkeynes@736 | 429 | return 2; |
nkeynes@736 | 430 | } else if( modules[j]->load(f) != 0 ) { |
nkeynes@736 | 431 | ERROR( "%s save state is corrupted (%s failed)", APP_NAME, modules[j]->name ); |
nkeynes@736 | 432 | fclose(f); |
nkeynes@736 | 433 | return 2; |
nkeynes@736 | 434 | } |
nkeynes@736 | 435 | break; |
nkeynes@736 | 436 | } |
nkeynes@736 | 437 | } |
nkeynes@736 | 438 | if( j == num_modules ) { |
nkeynes@736 | 439 | fclose(f); |
nkeynes@736 | 440 | ERROR( "%s save state contains unrecognized section", APP_NAME ); |
nkeynes@736 | 441 | return 2; |
nkeynes@736 | 442 | } |
nkeynes@17 | 443 | } |
nkeynes@736 | 444 | |
nkeynes@17 | 445 | /* Any modules that we didn't load - reset to the default state. |
nkeynes@17 | 446 | * (ie it's not an error to skip a module if you don't actually |
nkeynes@17 | 447 | * care about its state). |
nkeynes@17 | 448 | */ |
nkeynes@17 | 449 | for( j=0; j<num_modules; j++ ) { |
nkeynes@736 | 450 | if( have_read[j] == 0 && modules[j]->reset != NULL ) { |
nkeynes@736 | 451 | modules[j]->reset(); |
nkeynes@736 | 452 | } |
nkeynes@15 | 453 | } |
nkeynes@18 | 454 | fclose(f); |
nkeynes@18 | 455 | INFO( "Save state read from %s", filename ); |
nkeynes@422 | 456 | return 0; |
nkeynes@15 | 457 | } |
nkeynes@15 | 458 | |
nkeynes@18 | 459 | int dreamcast_save_state( const gchar *filename ) |
nkeynes@15 | 460 | { |
nkeynes@15 | 461 | int i; |
nkeynes@18 | 462 | FILE *f; |
nkeynes@15 | 463 | struct save_state_header header; |
nkeynes@736 | 464 | |
nkeynes@18 | 465 | f = fopen( filename, "w" ); |
nkeynes@18 | 466 | if( f == NULL ) |
nkeynes@736 | 467 | return errno; |
nkeynes@15 | 468 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC ); |
nkeynes@15 | 469 | header.version = DREAMCAST_SAVE_VERSION; |
nkeynes@18 | 470 | header.module_count = 0; |
nkeynes@18 | 471 | |
nkeynes@18 | 472 | for( i=0; i<num_modules; i++ ) { |
nkeynes@736 | 473 | if( modules[i]->save != NULL ) |
nkeynes@736 | 474 | header.module_count++; |
nkeynes@18 | 475 | } |
nkeynes@15 | 476 | fwrite( &header, sizeof(header), 1, f ); |
nkeynes@15 | 477 | for( i=0; i<num_modules; i++ ) { |
nkeynes@736 | 478 | if( modules[i]->save != NULL ) { |
nkeynes@736 | 479 | uint32_t blocklen, posn1, posn2; |
nkeynes@736 | 480 | dreamcast_write_chunk_header( modules[i]->name, 0, f ); |
nkeynes@736 | 481 | posn1 = ftell(f); |
nkeynes@736 | 482 | modules[i]->save(f); |
nkeynes@736 | 483 | posn2 = ftell(f); |
nkeynes@736 | 484 | blocklen = posn2 - posn1; |
nkeynes@736 | 485 | fseek( f, posn1-4, SEEK_SET ); |
nkeynes@736 | 486 | fwrite( &blocklen, sizeof(blocklen), 1, f ); |
nkeynes@736 | 487 | fseek( f, posn2, SEEK_SET ); |
nkeynes@736 | 488 | } |
nkeynes@15 | 489 | } |
nkeynes@18 | 490 | fclose( f ); |
nkeynes@18 | 491 | INFO( "Save state written to %s", filename ); |
nkeynes@422 | 492 | return 0; |
nkeynes@15 | 493 | } |
nkeynes@15 | 494 | |
nkeynes@953 | 495 | /********************* The Boot ROM address space **********************/ |
nkeynes@953 | 496 | static int32_t FASTCALL ext_bootrom_read_long( sh4addr_t addr ) |
nkeynes@953 | 497 | { |
nkeynes@953 | 498 | return *((int32_t *)(dc_boot_rom + (addr&0x001FFFFF))); |
nkeynes@953 | 499 | } |
nkeynes@953 | 500 | static int32_t FASTCALL ext_bootrom_read_word( sh4addr_t addr ) |
nkeynes@953 | 501 | { |
nkeynes@953 | 502 | return SIGNEXT16(*((int16_t *)(dc_boot_rom + (addr&0x001FFFFF)))); |
nkeynes@953 | 503 | } |
nkeynes@953 | 504 | static int32_t FASTCALL ext_bootrom_read_byte( sh4addr_t addr ) |
nkeynes@953 | 505 | { |
nkeynes@953 | 506 | return SIGNEXT8(*((int16_t *)(dc_boot_rom + (addr&0x001FFFFF)))); |
nkeynes@953 | 507 | } |
nkeynes@953 | 508 | static void FASTCALL ext_bootrom_read_burst( unsigned char *dest, sh4addr_t addr ) |
nkeynes@953 | 509 | { |
nkeynes@953 | 510 | memcpy( dest, dc_boot_rom +(addr&0x001FFFFF), 32 ); |
nkeynes@953 | 511 | } |
nkeynes@953 | 512 | |
nkeynes@953 | 513 | struct mem_region_fn mem_region_bootrom = { |
nkeynes@953 | 514 | ext_bootrom_read_long, unmapped_write_long, |
nkeynes@953 | 515 | ext_bootrom_read_word, unmapped_write_long, |
nkeynes@953 | 516 | ext_bootrom_read_byte, unmapped_write_long, |
nkeynes@953 | 517 | ext_bootrom_read_burst, unmapped_write_burst }; |
nkeynes@953 | 518 | |
nkeynes@953 | 519 | /********************* The Flash RAM address space **********************/ |
nkeynes@953 | 520 | static int32_t FASTCALL ext_flashram_read_long( sh4addr_t addr ) |
nkeynes@953 | 521 | { |
nkeynes@953 | 522 | return *((int32_t *)(dc_flash_ram + (addr&0x0001FFFF))); |
nkeynes@953 | 523 | } |
nkeynes@953 | 524 | static int32_t FASTCALL ext_flashram_read_word( sh4addr_t addr ) |
nkeynes@953 | 525 | { |
nkeynes@953 | 526 | return SIGNEXT16(*((int16_t *)(dc_flash_ram + (addr&0x0001FFFF)))); |
nkeynes@953 | 527 | } |
nkeynes@953 | 528 | static int32_t FASTCALL ext_flashram_read_byte( sh4addr_t addr ) |
nkeynes@953 | 529 | { |
nkeynes@953 | 530 | return SIGNEXT8(*((int16_t *)(dc_flash_ram + (addr&0x0001FFFF)))); |
nkeynes@953 | 531 | } |
nkeynes@953 | 532 | static void FASTCALL ext_flashram_write_long( sh4addr_t addr, uint32_t val ) |
nkeynes@953 | 533 | { |
nkeynes@953 | 534 | *(uint32_t *)(dc_flash_ram + (addr&0x0001FFFF)) = val; |
nkeynes@953 | 535 | asic_g2_write_word(); |
nkeynes@953 | 536 | } |
nkeynes@953 | 537 | static void FASTCALL ext_flashram_write_word( sh4addr_t addr, uint32_t val ) |
nkeynes@953 | 538 | { |
nkeynes@953 | 539 | *(uint16_t *)(dc_flash_ram + (addr&0x0001FFFF)) = (uint16_t)val; |
nkeynes@953 | 540 | asic_g2_write_word(); |
nkeynes@953 | 541 | } |
nkeynes@953 | 542 | static void FASTCALL ext_flashram_write_byte( sh4addr_t addr, uint32_t val ) |
nkeynes@953 | 543 | { |
nkeynes@953 | 544 | *(uint8_t *)(dc_flash_ram + (addr&0x0001FFFF)) = (uint8_t)val; |
nkeynes@953 | 545 | asic_g2_write_word(); |
nkeynes@953 | 546 | } |
nkeynes@953 | 547 | static void FASTCALL ext_flashram_read_burst( unsigned char *dest, sh4addr_t addr ) |
nkeynes@953 | 548 | { |
nkeynes@953 | 549 | memcpy( dest, dc_flash_ram+(addr&0x0001FFFF), 32 ); |
nkeynes@953 | 550 | } |
nkeynes@953 | 551 | static void FASTCALL ext_flashram_write_burst( sh4addr_t addr, unsigned char *src ) |
nkeynes@953 | 552 | { |
nkeynes@953 | 553 | memcpy( dc_flash_ram+(addr&0x0001FFFF), src, 32 ); |
nkeynes@953 | 554 | } |
nkeynes@953 | 555 | |
nkeynes@953 | 556 | struct mem_region_fn mem_region_flashram = { ext_flashram_read_long, ext_flashram_write_long, |
nkeynes@953 | 557 | ext_flashram_read_word, ext_flashram_write_word, |
nkeynes@953 | 558 | ext_flashram_read_byte, ext_flashram_write_byte, |
nkeynes@953 | 559 | ext_flashram_read_burst, ext_flashram_write_burst }; |
nkeynes@953 | 560 |
.