filename | src/dreamcast.c |
changeset | 18:9a1b5d75703f |
prev | 17:944f75eea496 |
next | 23:1ec3acd0594d |
author | nkeynes |
date | Thu Dec 22 07:38:12 2005 +0000 (18 years ago) |
permissions | -rw-r--r-- |
last change | Implement 95% of the SCIF serial interface Implement basic load_bin_file function to try to load demos directly Update TMU to run all 3 timers, start on general timing |
file | annotate | diff | log | raw |
nkeynes@18 | 1 | #include <errno.h> |
nkeynes@2 | 2 | #include "dream.h" |
nkeynes@2 | 3 | #include "mem.h" |
nkeynes@11 | 4 | #include "aica/aica.h" |
nkeynes@2 | 5 | #include "asic.h" |
nkeynes@2 | 6 | #include "ide.h" |
nkeynes@2 | 7 | #include "dreamcast.h" |
nkeynes@16 | 8 | #include "maple.h" |
nkeynes@15 | 9 | #include "modules.h" |
nkeynes@15 | 10 | |
nkeynes@2 | 11 | /* Central switchboard for the system */ |
nkeynes@2 | 12 | |
nkeynes@15 | 13 | #define MAX_MODULES 32 |
nkeynes@15 | 14 | static int num_modules = 0; |
nkeynes@15 | 15 | static int dreamcast_state = 0; |
nkeynes@17 | 16 | static char *dreamcast_config = "DEFAULT"; |
nkeynes@16 | 17 | dreamcast_module_t modules[MAX_MODULES]; |
nkeynes@15 | 18 | |
nkeynes@16 | 19 | /** |
nkeynes@16 | 20 | * This function is responsible for defining how all the pieces of the |
nkeynes@16 | 21 | * dreamcast actually fit together. Among other things, this lets us |
nkeynes@16 | 22 | * (reasonably) easily redefine the structure for eg various versions of the |
nkeynes@16 | 23 | * Naomi. |
nkeynes@16 | 24 | * |
nkeynes@16 | 25 | * Note currently the locations of the various MMIO pages are hard coded in |
nkeynes@16 | 26 | * the MMIO definitions - they should probably be moved here. |
nkeynes@16 | 27 | */ |
nkeynes@15 | 28 | void dreamcast_configure( ) |
nkeynes@15 | 29 | { |
nkeynes@16 | 30 | /* Register the memory framework */ |
nkeynes@15 | 31 | dreamcast_register_module( &mem_module ); |
nkeynes@16 | 32 | |
nkeynes@16 | 33 | /* Setup standard memory map */ |
nkeynes@16 | 34 | mem_create_ram_region( 0x0C000000, 16 MB, MEM_REGION_MAIN ); |
nkeynes@16 | 35 | mem_create_ram_region( 0x00800000, 2 MB, MEM_REGION_AUDIO ); |
nkeynes@16 | 36 | mem_create_ram_region( 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH ); |
nkeynes@16 | 37 | mem_create_ram_region( 0x05000000, 8 MB, MEM_REGION_VIDEO ); |
nkeynes@16 | 38 | mem_load_rom( "dcboot.rom", 0x00000000, 0x00200000, 0x89f2b1a1 ); |
nkeynes@16 | 39 | mem_load_rom( "dcflash.rom",0x00200000, 0x00020000, 0x357c3568 ); |
nkeynes@16 | 40 | |
nkeynes@16 | 41 | /* Load in the rest of the core modules */ |
nkeynes@15 | 42 | dreamcast_register_module( &sh4_module ); |
nkeynes@15 | 43 | dreamcast_register_module( &asic_module ); |
nkeynes@15 | 44 | dreamcast_register_module( &pvr2_module ); |
nkeynes@15 | 45 | dreamcast_register_module( &aica_module ); |
nkeynes@15 | 46 | dreamcast_register_module( &maple_module ); |
nkeynes@15 | 47 | dreamcast_register_module( &ide_module ); |
nkeynes@16 | 48 | |
nkeynes@16 | 49 | /* Attach any default maple devices, ie a pair of controllers */ |
nkeynes@16 | 50 | maple_device_t controller1 = controller_new(); |
nkeynes@16 | 51 | maple_device_t controller2 = controller_new(); |
nkeynes@16 | 52 | maple_attach_device( controller1, 0, 0 ); |
nkeynes@16 | 53 | maple_attach_device( controller2, 1, 0 ); |
nkeynes@15 | 54 | } |
nkeynes@15 | 55 | |
nkeynes@15 | 56 | void dreamcast_register_module( dreamcast_module_t module ) |
nkeynes@15 | 57 | { |
nkeynes@15 | 58 | modules[num_modules++] = module; |
nkeynes@16 | 59 | if( module->init != NULL ) |
nkeynes@16 | 60 | module->init(); |
nkeynes@15 | 61 | } |
nkeynes@15 | 62 | |
nkeynes@15 | 63 | |
nkeynes@2 | 64 | void dreamcast_init( void ) |
nkeynes@2 | 65 | { |
nkeynes@15 | 66 | dreamcast_configure(); |
nkeynes@2 | 67 | } |
nkeynes@2 | 68 | |
nkeynes@2 | 69 | void dreamcast_reset( void ) |
nkeynes@2 | 70 | { |
nkeynes@15 | 71 | int i; |
nkeynes@15 | 72 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 73 | if( modules[i]->reset != NULL ) |
nkeynes@15 | 74 | modules[i]->reset(); |
nkeynes@15 | 75 | } |
nkeynes@2 | 76 | } |
nkeynes@2 | 77 | |
nkeynes@15 | 78 | void dreamcast_start( void ) |
nkeynes@15 | 79 | { |
nkeynes@15 | 80 | int i; |
nkeynes@15 | 81 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 82 | if( modules[i]->start != NULL ) |
nkeynes@15 | 83 | modules[i]->start(); |
nkeynes@15 | 84 | } |
nkeynes@15 | 85 | } |
nkeynes@2 | 86 | void dreamcast_stop( void ) |
nkeynes@2 | 87 | { |
nkeynes@15 | 88 | int i; |
nkeynes@15 | 89 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 90 | if( modules[i]->stop != NULL ) |
nkeynes@15 | 91 | modules[i]->stop(); |
nkeynes@15 | 92 | } |
nkeynes@2 | 93 | } |
nkeynes@15 | 94 | |
nkeynes@15 | 95 | struct save_state_header { |
nkeynes@15 | 96 | char magic[16]; |
nkeynes@15 | 97 | uint32_t version; |
nkeynes@17 | 98 | uint32_t module_count; |
nkeynes@15 | 99 | }; |
nkeynes@15 | 100 | |
nkeynes@17 | 101 | |
nkeynes@18 | 102 | int dreamcast_load_state( const gchar *filename ) |
nkeynes@15 | 103 | { |
nkeynes@17 | 104 | int i,j; |
nkeynes@17 | 105 | uint32_t count, len; |
nkeynes@17 | 106 | int have_read[MAX_MODULES]; |
nkeynes@17 | 107 | char tmp[64]; |
nkeynes@15 | 108 | struct save_state_header header; |
nkeynes@18 | 109 | FILE *f; |
nkeynes@18 | 110 | |
nkeynes@18 | 111 | f = fopen( filename, "r" ); |
nkeynes@18 | 112 | if( f == NULL ) return errno; |
nkeynes@15 | 113 | |
nkeynes@15 | 114 | fread( &header, sizeof(header), 1, f ); |
nkeynes@15 | 115 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) { |
nkeynes@15 | 116 | ERROR( "Not a DreamOn save state file" ); |
nkeynes@17 | 117 | return 1; |
nkeynes@15 | 118 | } |
nkeynes@15 | 119 | if( header.version != DREAMCAST_SAVE_VERSION ) { |
nkeynes@15 | 120 | ERROR( "DreamOn save state version not supported" ); |
nkeynes@17 | 121 | return 1; |
nkeynes@17 | 122 | } |
nkeynes@18 | 123 | if( header.module_count > MAX_MODULES ) { |
nkeynes@18 | 124 | ERROR( "DreamOn save state is corrupted (bad module count)" ); |
nkeynes@17 | 125 | return 1; |
nkeynes@17 | 126 | } |
nkeynes@17 | 127 | for( i=0; i<MAX_MODULES; i++ ) { |
nkeynes@17 | 128 | have_read[i] = 0; |
nkeynes@15 | 129 | } |
nkeynes@15 | 130 | |
nkeynes@18 | 131 | for( i=0; i<header.module_count; i++ ) { |
nkeynes@17 | 132 | fread(tmp, 4, 1, f ); |
nkeynes@18 | 133 | if( strncmp(tmp, "BLCK", 4) != 0 ) { |
nkeynes@18 | 134 | ERROR( "DreamOn save state is corrupted (missing block header %d)", i ); |
nkeynes@17 | 135 | return 2; |
nkeynes@17 | 136 | } |
nkeynes@17 | 137 | len = fread_string(tmp, sizeof(tmp), f ); |
nkeynes@17 | 138 | if( len > 64 || len < 1 ) { |
nkeynes@18 | 139 | ERROR( "DreamOn save state is corrupted (bad string)" ); |
nkeynes@17 | 140 | return 2; |
nkeynes@17 | 141 | } |
nkeynes@17 | 142 | |
nkeynes@17 | 143 | /* Find the matching module by name */ |
nkeynes@17 | 144 | for( j=0; j<num_modules; j++ ) { |
nkeynes@17 | 145 | if( strcmp(modules[j]->name,tmp) == 0 ) { |
nkeynes@17 | 146 | have_read[j] = 1; |
nkeynes@17 | 147 | if( modules[j]->load == NULL ) { |
nkeynes@18 | 148 | ERROR( "DreamOn save state is corrupted (no loader for %s)", modules[j]->name ); |
nkeynes@17 | 149 | return 2; |
nkeynes@17 | 150 | } else if( modules[j]->load(f) != 0 ) { |
nkeynes@18 | 151 | ERROR( "DreamOn save state is corrupted (%s failed)", modules[j]->name ); |
nkeynes@17 | 152 | return 2; |
nkeynes@17 | 153 | } |
nkeynes@17 | 154 | break; |
nkeynes@17 | 155 | } |
nkeynes@17 | 156 | } |
nkeynes@17 | 157 | if( j == num_modules ) { |
nkeynes@17 | 158 | ERROR( "DreamOn save state contains unrecognized section" ); |
nkeynes@17 | 159 | return 2; |
nkeynes@17 | 160 | } |
nkeynes@17 | 161 | } |
nkeynes@17 | 162 | |
nkeynes@17 | 163 | /* Any modules that we didn't load - reset to the default state. |
nkeynes@17 | 164 | * (ie it's not an error to skip a module if you don't actually |
nkeynes@17 | 165 | * care about its state). |
nkeynes@17 | 166 | */ |
nkeynes@17 | 167 | for( j=0; j<num_modules; j++ ) { |
nkeynes@17 | 168 | if( have_read[j] == 0 && modules[j]->reset != NULL ) { |
nkeynes@17 | 169 | modules[j]->reset(); |
nkeynes@17 | 170 | } |
nkeynes@15 | 171 | } |
nkeynes@18 | 172 | fclose(f); |
nkeynes@18 | 173 | INFO( "Save state read from %s", filename ); |
nkeynes@15 | 174 | } |
nkeynes@15 | 175 | |
nkeynes@18 | 176 | int dreamcast_save_state( const gchar *filename ) |
nkeynes@15 | 177 | { |
nkeynes@15 | 178 | int i; |
nkeynes@18 | 179 | FILE *f; |
nkeynes@15 | 180 | struct save_state_header header; |
nkeynes@15 | 181 | |
nkeynes@18 | 182 | f = fopen( filename, "w" ); |
nkeynes@18 | 183 | if( f == NULL ) |
nkeynes@18 | 184 | return errno; |
nkeynes@15 | 185 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC ); |
nkeynes@15 | 186 | header.version = DREAMCAST_SAVE_VERSION; |
nkeynes@18 | 187 | header.module_count = 0; |
nkeynes@18 | 188 | |
nkeynes@18 | 189 | for( i=0; i<num_modules; i++ ) { |
nkeynes@18 | 190 | if( modules[i]->save != NULL ) |
nkeynes@18 | 191 | header.module_count++; |
nkeynes@18 | 192 | } |
nkeynes@15 | 193 | fwrite( &header, sizeof(header), 1, f ); |
nkeynes@15 | 194 | for( i=0; i<num_modules; i++ ) { |
nkeynes@15 | 195 | if( modules[i]->save != NULL ) { |
nkeynes@17 | 196 | fwrite( "BLCK", 4, 1, f ); |
nkeynes@17 | 197 | fwrite_string( modules[i]->name, f ); |
nkeynes@15 | 198 | modules[i]->save(f); |
nkeynes@15 | 199 | } |
nkeynes@15 | 200 | } |
nkeynes@18 | 201 | fclose( f ); |
nkeynes@18 | 202 | INFO( "Save state written to %s", filename ); |
nkeynes@15 | 203 | } |
nkeynes@15 | 204 |
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