filename | src/dreamcast.c |
changeset | 27:1ef09a52cd1e |
prev | 26:ad258e3daaa5 |
next | 30:89b30313d757 |
author | nkeynes |
date | Sun Dec 25 01:28:39 2005 +0000 (15 years ago) |
permissions | -rw-r--r-- |
last change | Refactor all the GUI bits out of the main directory (except for a couple lingering temporarily in loader.c Fix a few timeslice issues |
file | annotate | diff | log | raw |
nkeynes@26 | 1 | /** |
nkeynes@27 | 2 | * $Id: dreamcast.c,v 1.10 2005-12-25 01:28:36 nkeynes Exp $ |
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@2 | 21 | #include "dream.h" |
nkeynes@2 | 22 | #include "mem.h" |
nkeynes@11 | 23 | #include "aica/aica.h" |
nkeynes@2 | 24 | #include "asic.h" |
nkeynes@2 | 25 | #include "dreamcast.h" |
nkeynes@25 | 26 | #include "gdrom/ide.h" |
nkeynes@25 | 27 | #include "maple/maple.h" |
nkeynes@15 | 28 | #include "modules.h" |
nkeynes@15 | 29 | |
nkeynes@26 | 30 | /** |
nkeynes@26 | 31 | * Current state of the DC virtual machine |
nkeynes@26 | 32 | */ |
nkeynes@26 | 33 | #define STATE_UNINIT 0 |
nkeynes@26 | 34 | #define STATE_RUNNING 1 |
nkeynes@26 | 35 | #define STATE_STOPPING 2 |
nkeynes@26 | 36 | #define STATE_STOPPED 3 |
nkeynes@26 | 37 | static volatile int dreamcast_state = STATE_UNINIT; |
nkeynes@26 | 38 | static uint32_t timeslice_length = DEFAULT_TIMESLICE_LENGTH; |
nkeynes@26 | 39 | static char *dreamcast_config = "DEFAULT"; |
nkeynes@2 | 40 | |
nkeynes@15 | 41 | #define MAX_MODULES 32 |
nkeynes@15 | 42 | static int num_modules = 0; |
nkeynes@16 | 43 | dreamcast_module_t modules[MAX_MODULES]; |
nkeynes@15 | 44 | |
nkeynes@16 | 45 | /** |
nkeynes@16 | 46 | * This function is responsible for defining how all the pieces of the |
nkeynes@26 | 47 | * dreamcast actually fit together. |
nkeynes@16 | 48 | * |
nkeynes@16 | 49 | * Note currently the locations of the various MMIO pages are hard coded in |
nkeynes@16 | 50 | * the MMIO definitions - they should probably be moved here. |
nkeynes@16 | 51 | */ |
nkeynes@15 | 52 | void dreamcast_configure( ) |
nkeynes@15 | 53 | { |
nkeynes@16 | 54 | /* Register the memory framework */ |
nkeynes@15 | 55 | dreamcast_register_module( &mem_module ); |
nkeynes@16 | 56 | |
nkeynes@16 | 57 | /* Setup standard memory map */ |
nkeynes@16 | 58 | mem_create_ram_region( 0x0C000000, 16 MB, MEM_REGION_MAIN ); |
nkeynes@16 | 59 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO ); |
nkeynes@16 | 60 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH ); |
nkeynes@16 | 61 | mem_create_ram_region( 0x05000000, 8 MB, MEM_REGION_VIDEO ); |
nkeynes@16 | 62 | mem_load_rom( "dcboot.rom", 0x00000000, 0x00200000, 0x89f2b1a1 ); |
nkeynes@16 | 63 | mem_load_rom( "dcflash.rom",0x00200000, 0x00020000, 0x357c3568 ); |
nkeynes@16 | 64 | |
nkeynes@16 | 65 | /* Load in the rest of the core modules */ |
nkeynes@15 | 66 | dreamcast_register_module( &sh4_module ); |
nkeynes@15 | 67 | dreamcast_register_module( &asic_module ); |
nkeynes@15 | 68 | dreamcast_register_module( &pvr2_module ); |
nkeynes@15 | 69 | dreamcast_register_module( &aica_module ); |
nkeynes@15 | 70 | dreamcast_register_module( &maple_module ); |
nkeynes@15 | 71 | dreamcast_register_module( &ide_module ); |
nkeynes@16 | 72 | |
nkeynes@16 | 73 | /* Attach any default maple devices, ie a pair of controllers */ |
nkeynes@16 | 74 | maple_device_t controller1 = controller_new(); |
nkeynes@16 | 75 | maple_device_t controller2 = controller_new(); |
nkeynes@16 | 76 | maple_attach_device( controller1, 0, 0 ); |
nkeynes@16 | 77 | maple_attach_device( controller2, 1, 0 ); |
nkeynes@15 | 78 | } |
nkeynes@15 | 79 | |
nkeynes@15 | 80 | void dreamcast_register_module( dreamcast_module_t module ) |
nkeynes@15 | 81 | { |
nkeynes@15 | 82 | modules[num_modules++] = module; |
nkeynes@16 | 83 | if( module->init != NULL ) |
nkeynes@16 | 84 | module->init(); |
nkeynes@15 | 85 | } |
nkeynes@15 | 86 | |
nkeynes@15 | 87 | |
nkeynes@2 | 88 | void dreamcast_init( void ) |
nkeynes@2 | 89 | { |
nkeynes@15 | 90 | dreamcast_configure(); |
nkeynes@23 | 91 | dreamcast_state = STATE_STOPPED; |
nkeynes@2 | 92 | } |
nkeynes@2 | 93 | |
nkeynes@2 | 94 | void dreamcast_reset( void ) |
nkeynes@2 | 95 | { |
nkeynes@15 | 96 | int i; |
nkeynes@15 | 97 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 98 | if( modules[i]->reset != NULL ) |
nkeynes@15 | 99 | modules[i]->reset(); |
nkeynes@15 | 100 | } |
nkeynes@2 | 101 | } |
nkeynes@2 | 102 | |
nkeynes@23 | 103 | void dreamcast_run( void ) |
nkeynes@15 | 104 | { |
nkeynes@15 | 105 | int i; |
nkeynes@23 | 106 | if( dreamcast_state != STATE_RUNNING ) { |
nkeynes@23 | 107 | for( i=0; i<num_modules; i++ ) { |
nkeynes@23 | 108 | if( modules[i]->start != NULL ) |
nkeynes@23 | 109 | modules[i]->start(); |
nkeynes@23 | 110 | } |
nkeynes@15 | 111 | } |
nkeynes@23 | 112 | dreamcast_state = STATE_RUNNING; |
nkeynes@23 | 113 | while( dreamcast_state == STATE_RUNNING ) { |
nkeynes@27 | 114 | int time_to_run = timeslice_length; |
nkeynes@23 | 115 | for( i=0; i<num_modules; i++ ) { |
nkeynes@23 | 116 | if( modules[i]->run_time_slice != NULL ) |
nkeynes@27 | 117 | time_to_run = modules[i]->run_time_slice( time_to_run ); |
nkeynes@23 | 118 | } |
nkeynes@23 | 119 | |
nkeynes@23 | 120 | } |
nkeynes@23 | 121 | |
nkeynes@15 | 122 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 123 | if( modules[i]->stop != NULL ) |
nkeynes@15 | 124 | modules[i]->stop(); |
nkeynes@15 | 125 | } |
nkeynes@23 | 126 | dreamcast_state = STATE_STOPPED; |
nkeynes@2 | 127 | } |
nkeynes@15 | 128 | |
nkeynes@23 | 129 | void dreamcast_stop( void ) |
nkeynes@23 | 130 | { |
nkeynes@23 | 131 | if( dreamcast_state == STATE_RUNNING ) |
nkeynes@23 | 132 | dreamcast_state = STATE_STOPPING; |
nkeynes@23 | 133 | } |
nkeynes@17 | 134 | |
nkeynes@26 | 135 | gboolean dreamcast_is_running( void ) |
nkeynes@26 | 136 | { |
nkeynes@26 | 137 | return dreamcast_state == STATE_RUNNING; |
nkeynes@26 | 138 | } |
nkeynes@26 | 139 | |
nkeynes@26 | 140 | |
nkeynes@26 | 141 | /********************************* Save States *****************************/ |
nkeynes@26 | 142 | |
nkeynes@26 | 143 | #define DREAMCAST_SAVE_MAGIC "%!-DreamOn!Save\0" |
nkeynes@26 | 144 | #define DREAMCAST_SAVE_VERSION 0x00010000 |
nkeynes@26 | 145 | |
nkeynes@26 | 146 | struct save_state_header { |
nkeynes@26 | 147 | char magic[16]; |
nkeynes@26 | 148 | uint32_t version; |
nkeynes@26 | 149 | uint32_t module_count; |
nkeynes@26 | 150 | }; |
nkeynes@26 | 151 | |
nkeynes@18 | 152 | int dreamcast_load_state( const gchar *filename ) |
nkeynes@15 | 153 | { |
nkeynes@17 | 154 | int i,j; |
nkeynes@17 | 155 | uint32_t count, len; |
nkeynes@17 | 156 | int have_read[MAX_MODULES]; |
nkeynes@17 | 157 | char tmp[64]; |
nkeynes@15 | 158 | struct save_state_header header; |
nkeynes@18 | 159 | FILE *f; |
nkeynes@18 | 160 | |
nkeynes@18 | 161 | f = fopen( filename, "r" ); |
nkeynes@18 | 162 | if( f == NULL ) return errno; |
nkeynes@15 | 163 | |
nkeynes@15 | 164 | fread( &header, sizeof(header), 1, f ); |
nkeynes@15 | 165 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) { |
nkeynes@15 | 166 | ERROR( "Not a DreamOn save state file" ); |
nkeynes@17 | 167 | return 1; |
nkeynes@15 | 168 | } |
nkeynes@15 | 169 | if( header.version != DREAMCAST_SAVE_VERSION ) { |
nkeynes@15 | 170 | ERROR( "DreamOn save state version not supported" ); |
nkeynes@17 | 171 | return 1; |
nkeynes@17 | 172 | } |
nkeynes@18 | 173 | if( header.module_count > MAX_MODULES ) { |
nkeynes@18 | 174 | ERROR( "DreamOn save state is corrupted (bad module count)" ); |
nkeynes@17 | 175 | return 1; |
nkeynes@17 | 176 | } |
nkeynes@17 | 177 | for( i=0; i<MAX_MODULES; i++ ) { |
nkeynes@17 | 178 | have_read[i] = 0; |
nkeynes@15 | 179 | } |
nkeynes@15 | 180 | |
nkeynes@18 | 181 | for( i=0; i<header.module_count; i++ ) { |
nkeynes@17 | 182 | fread(tmp, 4, 1, f ); |
nkeynes@18 | 183 | if( strncmp(tmp, "BLCK", 4) != 0 ) { |
nkeynes@18 | 184 | ERROR( "DreamOn save state is corrupted (missing block header %d)", i ); |
nkeynes@17 | 185 | return 2; |
nkeynes@17 | 186 | } |
nkeynes@17 | 187 | len = fread_string(tmp, sizeof(tmp), f ); |
nkeynes@17 | 188 | if( len > 64 || len < 1 ) { |
nkeynes@18 | 189 | ERROR( "DreamOn save state is corrupted (bad string)" ); |
nkeynes@17 | 190 | return 2; |
nkeynes@17 | 191 | } |
nkeynes@17 | 192 | |
nkeynes@17 | 193 | /* Find the matching module by name */ |
nkeynes@17 | 194 | for( j=0; j<num_modules; j++ ) { |
nkeynes@17 | 195 | if( strcmp(modules[j]->name,tmp) == 0 ) { |
nkeynes@17 | 196 | have_read[j] = 1; |
nkeynes@17 | 197 | if( modules[j]->load == NULL ) { |
nkeynes@18 | 198 | ERROR( "DreamOn save state is corrupted (no loader for %s)", modules[j]->name ); |
nkeynes@17 | 199 | return 2; |
nkeynes@17 | 200 | } else if( modules[j]->load(f) != 0 ) { |
nkeynes@18 | 201 | ERROR( "DreamOn save state is corrupted (%s failed)", modules[j]->name ); |
nkeynes@17 | 202 | return 2; |
nkeynes@17 | 203 | } |
nkeynes@17 | 204 | break; |
nkeynes@17 | 205 | } |
nkeynes@17 | 206 | } |
nkeynes@17 | 207 | if( j == num_modules ) { |
nkeynes@17 | 208 | ERROR( "DreamOn save state contains unrecognized section" ); |
nkeynes@17 | 209 | return 2; |
nkeynes@17 | 210 | } |
nkeynes@17 | 211 | } |
nkeynes@17 | 212 | |
nkeynes@17 | 213 | /* Any modules that we didn't load - reset to the default state. |
nkeynes@17 | 214 | * (ie it's not an error to skip a module if you don't actually |
nkeynes@17 | 215 | * care about its state). |
nkeynes@17 | 216 | */ |
nkeynes@17 | 217 | for( j=0; j<num_modules; j++ ) { |
nkeynes@17 | 218 | if( have_read[j] == 0 && modules[j]->reset != NULL ) { |
nkeynes@17 | 219 | modules[j]->reset(); |
nkeynes@17 | 220 | } |
nkeynes@15 | 221 | } |
nkeynes@18 | 222 | fclose(f); |
nkeynes@18 | 223 | INFO( "Save state read from %s", filename ); |
nkeynes@15 | 224 | } |
nkeynes@15 | 225 | |
nkeynes@18 | 226 | int dreamcast_save_state( const gchar *filename ) |
nkeynes@15 | 227 | { |
nkeynes@15 | 228 | int i; |
nkeynes@18 | 229 | FILE *f; |
nkeynes@15 | 230 | struct save_state_header header; |
nkeynes@15 | 231 | |
nkeynes@18 | 232 | f = fopen( filename, "w" ); |
nkeynes@18 | 233 | if( f == NULL ) |
nkeynes@18 | 234 | return errno; |
nkeynes@15 | 235 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC ); |
nkeynes@15 | 236 | header.version = DREAMCAST_SAVE_VERSION; |
nkeynes@18 | 237 | header.module_count = 0; |
nkeynes@18 | 238 | |
nkeynes@18 | 239 | for( i=0; i<num_modules; i++ ) { |
nkeynes@18 | 240 | if( modules[i]->save != NULL ) |
nkeynes@18 | 241 | header.module_count++; |
nkeynes@18 | 242 | } |
nkeynes@15 | 243 | fwrite( &header, sizeof(header), 1, f ); |
nkeynes@15 | 244 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 245 | if( modules[i]->save != NULL ) { |
nkeynes@17 | 246 | fwrite( "BLCK", 4, 1, f ); |
nkeynes@17 | 247 | fwrite_string( modules[i]->name, f ); |
nkeynes@15 | 248 | modules[i]->save(f); |
nkeynes@15 | 249 | } |
nkeynes@15 | 250 | } |
nkeynes@18 | 251 | fclose( f ); |
nkeynes@18 | 252 | INFO( "Save state written to %s", filename ); |
nkeynes@15 | 253 | } |
nkeynes@15 | 254 |
.