nkeynes@26 | 1 | /**
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nkeynes@586 | 2 | * $Id$
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nkeynes@26 | 3 | * Central switchboard for the system. This pulls all the individual modules
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nkeynes@26 | 4 | * together into some kind of coherent structure. This is also where you'd
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nkeynes@26 | 5 | * add Naomi support, if I ever get a board to play with...
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nkeynes@26 | 6 | *
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nkeynes@26 | 7 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@26 | 8 | *
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nkeynes@26 | 9 | * This program is free software; you can redistribute it and/or modify
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nkeynes@26 | 10 | * it under the terms of the GNU General Public License as published by
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nkeynes@26 | 11 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@26 | 12 | * (at your option) any later version.
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nkeynes@26 | 13 | *
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nkeynes@26 | 14 | * This program is distributed in the hope that it will be useful,
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nkeynes@26 | 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@26 | 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@26 | 17 | * GNU General Public License for more details.
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nkeynes@26 | 18 | */
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nkeynes@26 | 19 |
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nkeynes@18 | 20 | #include <errno.h>
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nkeynes@543 | 21 | #include <glib.h>
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nkeynes@669 | 22 | #include "lxdream.h"
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nkeynes@740 | 23 | #include "dream.h"
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nkeynes@2 | 24 | #include "mem.h"
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nkeynes@669 | 25 | #include "dreamcast.h"
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nkeynes@669 | 26 | #include "asic.h"
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nkeynes@669 | 27 | #include "syscall.h"
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nkeynes@669 | 28 | #include "gui.h"
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nkeynes@11 | 29 | #include "aica/aica.h"
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nkeynes@25 | 30 | #include "gdrom/ide.h"
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nkeynes@25 | 31 | #include "maple/maple.h"
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nkeynes@953 | 32 | #include "pvr2/pvr2.h"
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nkeynes@669 | 33 | #include "sh4/sh4.h"
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nkeynes@740 | 34 | #include "sh4/sh4core.h"
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nkeynes@1034 | 35 | #include "vmu/vmulist.h"
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nkeynes@15 | 36 |
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nkeynes@26 | 37 | /**
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nkeynes@26 | 38 | * Current state of the DC virtual machine
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nkeynes@26 | 39 | */
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nkeynes@543 | 40 | typedef enum { STATE_UNINIT=0, STATE_RUNNING,
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nkeynes@736 | 41 | STATE_STOPPING, STATE_STOPPED } dreamcast_state_t;
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nkeynes@736 | 42 |
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nkeynes@543 | 43 | static volatile dreamcast_state_t dreamcast_state = STATE_UNINIT;
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nkeynes@543 | 44 | static gboolean dreamcast_has_bios = FALSE;
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nkeynes@742 | 45 | static gboolean dreamcast_has_flash = FALSE;
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nkeynes@689 | 46 | static gboolean dreamcast_exit_on_stop = FALSE;
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nkeynes@543 | 47 | static gchar *dreamcast_program_name = NULL;
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nkeynes@543 | 48 | static sh4addr_t dreamcast_entry_point = 0xA0000000;
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nkeynes@26 | 49 | static uint32_t timeslice_length = DEFAULT_TIMESLICE_LENGTH;
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nkeynes@689 | 50 | static uint64_t run_time_nanosecs = 0;
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nkeynes@2 | 51 |
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nkeynes@15 | 52 | #define MAX_MODULES 32
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nkeynes@15 | 53 | static int num_modules = 0;
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nkeynes@16 | 54 | dreamcast_module_t modules[MAX_MODULES];
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nkeynes@15 | 55 |
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nkeynes@16 | 56 | /**
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nkeynes@35 | 57 | * The unknown module is used for logging files without an actual module
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nkeynes@35 | 58 | * declaration
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nkeynes@35 | 59 | */
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nkeynes@35 | 60 | struct dreamcast_module unknown_module = { "****", NULL, NULL, NULL, NULL,
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nkeynes@736 | 61 | NULL, NULL, NULL };
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nkeynes@35 | 62 |
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nkeynes@953 | 63 | extern struct mem_region_fn mem_region_sdram;
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nkeynes@953 | 64 | extern struct mem_region_fn mem_region_vram32;
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nkeynes@953 | 65 | extern struct mem_region_fn mem_region_vram64;
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nkeynes@953 | 66 | extern struct mem_region_fn mem_region_audioram;
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nkeynes@953 | 67 | extern struct mem_region_fn mem_region_audioscratch;
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nkeynes@953 | 68 | extern struct mem_region_fn mem_region_flashram;
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nkeynes@953 | 69 | extern struct mem_region_fn mem_region_bootrom;
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nkeynes@953 | 70 | extern struct mem_region_fn mem_region_pvr2ta;
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nkeynes@953 | 71 | extern struct mem_region_fn mem_region_pvr2yuv;
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nkeynes@953 | 72 | extern struct mem_region_fn mem_region_pvr2vdma1;
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nkeynes@953 | 73 | extern struct mem_region_fn mem_region_pvr2vdma2;
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nkeynes@953 | 74 |
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nkeynes@953 | 75 | unsigned char dc_main_ram[16 MB];
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nkeynes@953 | 76 | unsigned char dc_boot_rom[2 MB];
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nkeynes@953 | 77 | unsigned char dc_flash_ram[128 KB];
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nkeynes@953 | 78 |
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nkeynes@35 | 79 | /**
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nkeynes@16 | 80 | * This function is responsible for defining how all the pieces of the
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nkeynes@26 | 81 | * dreamcast actually fit together.
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nkeynes@16 | 82 | *
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nkeynes@16 | 83 | * Note currently the locations of the various MMIO pages are hard coded in
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nkeynes@16 | 84 | * the MMIO definitions - they should probably be moved here.
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nkeynes@16 | 85 | */
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nkeynes@15 | 86 | void dreamcast_configure( )
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nkeynes@15 | 87 | {
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nkeynes@825 | 88 | const char *bios_path = lxdream_get_config_value(CONFIG_BIOS_PATH);
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nkeynes@825 | 89 | const char *flash_path = lxdream_get_config_value(CONFIG_FLASH_PATH);
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nkeynes@825 | 90 |
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nkeynes@265 | 91 | dreamcast_register_module( &eventq_module );
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nkeynes@16 | 92 | /* Register the memory framework */
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nkeynes@15 | 93 | dreamcast_register_module( &mem_module );
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nkeynes@16 | 94 |
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nkeynes@16 | 95 | /* Setup standard memory map */
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nkeynes@953 | 96 | mem_map_region( dc_boot_rom, 0x00000000, 2 MB, MEM_REGION_BIOS, &mem_region_bootrom, MEM_FLAG_ROM, 2 MB, 0 );
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nkeynes@953 | 97 | mem_map_region( dc_flash_ram, 0x00200000, 128 KB, MEM_REGION_FLASH, &mem_region_flashram, MEM_FLAG_RAM, 128 KB, 0 );
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nkeynes@953 | 98 | mem_map_region( aica_main_ram, 0x00800000, 2 MB, MEM_REGION_AUDIO, &mem_region_audioram, MEM_FLAG_RAM, 2 MB, 0 );
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nkeynes@953 | 99 | mem_map_region( aica_scratch_ram,0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH,&mem_region_audioscratch, MEM_FLAG_RAM, 8 KB, 0 );
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nkeynes@953 | 100 | mem_map_region( NULL, 0x04000000, 8 MB, MEM_REGION_VIDEO64, &mem_region_vram64, 0, 8 MB, 0 );
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nkeynes@953 | 101 | mem_map_region( pvr2_main_ram, 0x05000000, 8 MB, MEM_REGION_VIDEO, &mem_region_vram32, MEM_FLAG_RAM, 8 MB, 0 );
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nkeynes@953 | 102 | mem_map_region( dc_main_ram, 0x0C000000, 16 MB, MEM_REGION_MAIN, &mem_region_sdram, MEM_FLAG_RAM, 0x01000000, 0x0F000000 );
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nkeynes@953 | 103 | mem_map_region( NULL, 0x10000000, 8 MB, MEM_REGION_PVR2TA, &mem_region_pvr2ta, 0, 0x02000000, 0x12000000 );
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nkeynes@953 | 104 | mem_map_region( NULL, 0x10800000, 8 MB, MEM_REGION_PVR2YUV, &mem_region_pvr2yuv, 0, 0x02000000, 0x12800000 );
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nkeynes@953 | 105 | mem_map_region( NULL, 0x11000000, 16 MB, MEM_REGION_PVR2VDMA1, &mem_region_pvr2vdma1, 0, 16 MB, 0 );
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nkeynes@953 | 106 | mem_map_region( NULL, 0x13000000, 16 MB, MEM_REGION_PVR2VDMA2, &mem_region_pvr2vdma2, 0, 16 MB, 0 );
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nkeynes@953 | 107 |
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nkeynes@953 | 108 | dreamcast_has_bios = mem_load_rom( dc_boot_rom, bios_path, 2 MB, 0x89f2b1a1 );
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nkeynes@825 | 109 | if( flash_path != NULL && flash_path[0] != '\0' ) {
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nkeynes@825 | 110 | mem_load_block( flash_path, 0x00200000, 0x00020000 );
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nkeynes@825 | 111 | }
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nkeynes@742 | 112 | dreamcast_has_flash = TRUE;
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nkeynes@16 | 113 |
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nkeynes@16 | 114 | /* Load in the rest of the core modules */
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nkeynes@15 | 115 | dreamcast_register_module( &sh4_module );
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nkeynes@15 | 116 | dreamcast_register_module( &asic_module );
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nkeynes@15 | 117 | dreamcast_register_module( &pvr2_module );
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nkeynes@15 | 118 | dreamcast_register_module( &aica_module );
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nkeynes@15 | 119 | dreamcast_register_module( &maple_module );
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nkeynes@15 | 120 | dreamcast_register_module( &ide_module );
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nkeynes@15 | 121 | }
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nkeynes@15 | 122 |
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nkeynes@461 | 123 | void dreamcast_config_changed(void)
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nkeynes@461 | 124 | {
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nkeynes@825 | 125 | const char *bios_path = lxdream_get_config_value(CONFIG_BIOS_PATH);
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nkeynes@825 | 126 | const char *flash_path = lxdream_get_config_value(CONFIG_FLASH_PATH);
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nkeynes@953 | 127 | dreamcast_has_bios = mem_load_rom( dc_boot_rom, bios_path, 2 MB, 0x89f2b1a1 );
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nkeynes@825 | 128 | if( flash_path != NULL && flash_path[0] != '\0' ) {
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nkeynes@825 | 129 | mem_load_block( flash_path, 0x00200000, 0x00020000 );
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nkeynes@825 | 130 | }
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nkeynes@461 | 131 | }
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nkeynes@461 | 132 |
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nkeynes@277 | 133 | void dreamcast_save_flash()
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nkeynes@277 | 134 | {
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nkeynes@742 | 135 | if( dreamcast_has_flash ) {
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nkeynes@742 | 136 | const char *file = lxdream_get_config_value(CONFIG_FLASH_PATH);
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nkeynes@742 | 137 | mem_save_block( file, 0x00200000, 0x00020000 );
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nkeynes@742 | 138 | }
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nkeynes@277 | 139 | }
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nkeynes@277 | 140 |
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nkeynes@71 | 141 | /**
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nkeynes@71 | 142 | * Constructs a system configuration for the AICA in standalone mode,
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nkeynes@71 | 143 | * ie sound chip only.
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nkeynes@71 | 144 | */
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nkeynes@71 | 145 | void dreamcast_configure_aica_only( )
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nkeynes@71 | 146 | {
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nkeynes@71 | 147 | dreamcast_register_module( &mem_module );
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nkeynes@953 | 148 | mem_map_region( aica_main_ram, 0x00800000, 2 MB, MEM_REGION_AUDIO, &mem_region_audioram, MEM_FLAG_RAM, 2 MB, 0 );
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nkeynes@953 | 149 | mem_map_region( aica_scratch_ram, 0x00703000, 8 KB, MEM_REGION_AUDIO_SCRATCH, &mem_region_audioscratch, MEM_FLAG_RAM, 8 KB, 0 );
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nkeynes@71 | 150 | dreamcast_register_module( &aica_module );
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nkeynes@89 | 151 | aica_enable();
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nkeynes@71 | 152 | dreamcast_state = STATE_STOPPED;
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nkeynes@71 | 153 | }
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nkeynes@71 | 154 |
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nkeynes@15 | 155 | void dreamcast_register_module( dreamcast_module_t module )
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nkeynes@15 | 156 | {
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nkeynes@15 | 157 | modules[num_modules++] = module;
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nkeynes@16 | 158 | if( module->init != NULL )
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nkeynes@736 | 159 | module->init();
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nkeynes@15 | 160 | }
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nkeynes@15 | 161 |
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nkeynes@689 | 162 | void dreamcast_set_run_time( uint32_t secs, uint32_t nanosecs )
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nkeynes@689 | 163 | {
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nkeynes@689 | 164 | run_time_nanosecs = (((uint64_t)secs) * 1000000000) + nanosecs;
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nkeynes@689 | 165 | }
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nkeynes@689 | 166 |
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nkeynes@689 | 167 | void dreamcast_set_exit_on_stop( gboolean flag )
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nkeynes@689 | 168 | {
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nkeynes@689 | 169 | dreamcast_exit_on_stop = flag;
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nkeynes@689 | 170 | }
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nkeynes@15 | 171 |
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nkeynes@2 | 172 | void dreamcast_init( void )
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nkeynes@2 | 173 | {
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nkeynes@15 | 174 | dreamcast_configure();
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nkeynes@23 | 175 | dreamcast_state = STATE_STOPPED;
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nkeynes@2 | 176 | }
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nkeynes@2 | 177 |
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nkeynes@2 | 178 | void dreamcast_reset( void )
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nkeynes@2 | 179 | {
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nkeynes@766 | 180 | sh4_core_exit(CORE_EXIT_SYSRESET);
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nkeynes@15 | 181 | int i;
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nkeynes@15 | 182 | for( i=0; i<num_modules; i++ ) {
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nkeynes@736 | 183 | if( modules[i]->reset != NULL )
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nkeynes@736 | 184 | modules[i]->reset();
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nkeynes@15 | 185 | }
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nkeynes@2 | 186 | }
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nkeynes@2 | 187 |
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nkeynes@23 | 188 | void dreamcast_run( void )
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nkeynes@15 | 189 | {
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nkeynes@15 | 190 | int i;
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nkeynes@889 | 191 |
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nkeynes@889 | 192 | if( !dreamcast_can_run() ) {
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nkeynes@889 | 193 | 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"));
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nkeynes@889 | 194 | return;
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nkeynes@889 | 195 | }
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nkeynes@889 | 196 |
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nkeynes@23 | 197 | if( dreamcast_state != STATE_RUNNING ) {
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nkeynes@689 | 198 | for( i=0; i<num_modules; i++ ) {
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nkeynes@689 | 199 | if( modules[i]->start != NULL )
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nkeynes@689 | 200 | modules[i]->start();
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nkeynes@689 | 201 | }
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nkeynes@15 | 202 | }
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nkeynes@839 | 203 |
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nkeynes@839 | 204 | if( maple_should_grab() ) {
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nkeynes@839 | 205 | gui_set_use_grab(TRUE);
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nkeynes@839 | 206 | }
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nkeynes@736 | 207 |
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nkeynes@23 | 208 | dreamcast_state = STATE_RUNNING;
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nkeynes@736 | 209 |
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nkeynes@689 | 210 | if( run_time_nanosecs != 0 ) {
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nkeynes@689 | 211 | while( dreamcast_state == STATE_RUNNING ) {
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nkeynes@689 | 212 | uint32_t time_to_run = timeslice_length;
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nkeynes@689 | 213 | if( run_time_nanosecs < time_to_run ) {
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nkeynes@689 | 214 | time_to_run = (uint32_t)run_time_nanosecs;
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nkeynes@689 | 215 | }
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nkeynes@736 | 216 |
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nkeynes@689 | 217 | for( i=0; i<num_modules; i++ ) {
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nkeynes@689 | 218 | if( modules[i]->run_time_slice != NULL )
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nkeynes@689 | 219 | time_to_run = modules[i]->run_time_slice( time_to_run );
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nkeynes@689 | 220 | }
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nkeynes@736 | 221 |
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nkeynes@689 | 222 | if( run_time_nanosecs > time_to_run ) {
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nkeynes@689 | 223 | run_time_nanosecs -= time_to_run;
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nkeynes@689 | 224 | } else {
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nkeynes@689 | 225 | run_time_nanosecs = 0; // Finished
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nkeynes@689 | 226 | break;
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nkeynes@689 | 227 | }
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nkeynes@689 | 228 | }
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nkeynes@689 | 229 | } else {
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nkeynes@689 | 230 | while( dreamcast_state == STATE_RUNNING ) {
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nkeynes@689 | 231 | int time_to_run = timeslice_length;
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nkeynes@689 | 232 | for( i=0; i<num_modules; i++ ) {
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nkeynes@689 | 233 | if( modules[i]->run_time_slice != NULL )
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nkeynes@689 | 234 | time_to_run = modules[i]->run_time_slice( time_to_run );
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nkeynes@689 | 235 | }
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nkeynes@23 | 236 |
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nkeynes@689 | 237 | }
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nkeynes@23 | 238 | }
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nkeynes@23 | 239 |
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nkeynes@839 | 240 | gui_set_use_grab(FALSE);
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nkeynes@839 | 241 |
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nkeynes@15 | 242 | for( i=0; i<num_modules; i++ ) {
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nkeynes@689 | 243 | if( modules[i]->stop != NULL )
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nkeynes@689 | 244 | modules[i]->stop();
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nkeynes@15 | 245 | }
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nkeynes@1034 | 246 |
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nkeynes@1034 | 247 | vmulist_save_all();
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nkeynes@23 | 248 | dreamcast_state = STATE_STOPPED;
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nkeynes@736 | 249 |
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nkeynes@689 | 250 | if( dreamcast_exit_on_stop ) {
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nkeynes@689 | 251 | dreamcast_shutdown();
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nkeynes@689 | 252 | exit(0);
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nkeynes@372 | 253 | }
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nkeynes@372 | 254 | }
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nkeynes@372 | 255 |
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nkeynes@23 | 256 | void dreamcast_stop( void )
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nkeynes@23 | 257 | {
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nkeynes@740 | 258 | sh4_core_exit(CORE_EXIT_HALT); // returns only if not inside SH4 core
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nkeynes@23 | 259 | if( dreamcast_state == STATE_RUNNING )
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nkeynes@736 | 260 | dreamcast_state = STATE_STOPPING;
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nkeynes@23 | 261 | }
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nkeynes@17 | 262 |
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nkeynes@277 | 263 | void dreamcast_shutdown()
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nkeynes@277 | 264 | {
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nkeynes@727 | 265 | // Don't do a dreamcast_stop - if we're calling this out of SH4 code,
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nkeynes@727 | 266 | // it's a shutdown-and-quit event
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nkeynes@727 | 267 | if( dreamcast_state == STATE_RUNNING )
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nkeynes@727 | 268 | dreamcast_state = STATE_STOPPING;
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nkeynes@277 | 269 | dreamcast_save_flash();
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nkeynes@1034 | 270 | vmulist_save_all();
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nkeynes@671 | 271 | #ifdef ENABLE_SH4STATS
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nkeynes@671 | 272 | sh4_stats_print(stdout);
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nkeynes@671 | 273 | #endif
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nkeynes@277 | 274 | }
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nkeynes@277 | 275 |
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nkeynes@543 | 276 | void dreamcast_program_loaded( const gchar *name, sh4addr_t entry_point )
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nkeynes@543 | 277 | {
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nkeynes@543 | 278 | if( dreamcast_program_name != NULL ) {
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nkeynes@543 | 279 | g_free(dreamcast_program_name);
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nkeynes@543 | 280 | }
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nkeynes@543 | 281 | dreamcast_program_name = g_strdup(name);
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nkeynes@543 | 282 | dreamcast_entry_point = entry_point;
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nkeynes@543 | 283 | sh4_set_pc(entry_point);
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nkeynes@953 | 284 | sh4_write_sr( sh4_read_sr() & (~SR_BL) ); /* Unmask interrupts */
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nkeynes@586 | 285 | bios_install();
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nkeynes@543 | 286 | dcload_install();
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nkeynes@543 | 287 | gui_update_state();
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nkeynes@543 | 288 | }
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nkeynes@543 | 289 |
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nkeynes@26 | 290 | gboolean dreamcast_is_running( void )
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nkeynes@26 | 291 | {
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nkeynes@26 | 292 | return dreamcast_state == STATE_RUNNING;
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nkeynes@26 | 293 | }
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nkeynes@26 | 294 |
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nkeynes@543 | 295 | gboolean dreamcast_can_run(void)
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nkeynes@543 | 296 | {
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nkeynes@543 | 297 | return dreamcast_state != STATE_UNINIT &&
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nkeynes@736 | 298 | (dreamcast_has_bios || dreamcast_program_name != NULL);
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nkeynes@543 | 299 | }
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nkeynes@543 | 300 |
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nkeynes@26 | 301 | /********************************* Save States *****************************/
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nkeynes@26 | 302 |
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nkeynes@26 | 303 | struct save_state_header {
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nkeynes@26 | 304 | char magic[16];
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nkeynes@26 | 305 | uint32_t version;
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nkeynes@26 | 306 | uint32_t module_count;
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nkeynes@26 | 307 | };
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nkeynes@26 | 308 |
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nkeynes@477 | 309 | struct chunk_header {
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nkeynes@477 | 310 | char marker[4]; /* Always BLCK */
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nkeynes@477 | 311 | char name[8]; /* Block (module) name */
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nkeynes@477 | 312 | uint32_t block_length;
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nkeynes@477 | 313 | };
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nkeynes@477 | 314 |
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nkeynes@477 | 315 | /**
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nkeynes@477 | 316 | * Check the save state header to ensure that it is a valid, supported
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nkeynes@477 | 317 | * file.
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nkeynes@477 | 318 | * @return the number of blocks following, or 0 if the file is invalid.
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nkeynes@477 | 319 | */
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nkeynes@891 | 320 | int dreamcast_read_save_state_header( FILE *f, char *error, int errorlen )
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nkeynes@477 | 321 | {
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nkeynes@477 | 322 | struct save_state_header header;
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nkeynes@477 | 323 | if( fread( &header, sizeof(header), 1, f ) != 1 ) {
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nkeynes@736 | 324 | return 0;
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nkeynes@477 | 325 | }
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nkeynes@477 | 326 | if( strncmp( header.magic, DREAMCAST_SAVE_MAGIC, 16 ) != 0 ) {
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nkeynes@891 | 327 | if( error != NULL )
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nkeynes@891 | 328 | snprintf( error, errorlen, _("File is not a %s save state"), APP_NAME );
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nkeynes@736 | 329 | return 0;
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nkeynes@477 | 330 | }
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nkeynes@477 | 331 | if( header.version != DREAMCAST_SAVE_VERSION ) {
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nkeynes@891 | 332 | if( error != NULL )
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nkeynes@892 | 333 | snprintf( error, errorlen, _("Unsupported %s save state version"), APP_NAME );
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nkeynes@736 | 334 | return 0;
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nkeynes@477 | 335 | }
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nkeynes@477 | 336 | if( header.module_count > MAX_MODULES ) {
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nkeynes@891 | 337 | if( error != NULL )
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nkeynes@891 | 338 | snprintf( error, errorlen, _("%s save state is corrupted (bad module count)"), APP_NAME );
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nkeynes@736 | 339 | return 0;
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nkeynes@477 | 340 | }
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nkeynes@477 | 341 | return header.module_count;
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nkeynes@477 | 342 | }
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nkeynes@477 | 343 |
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nkeynes@477 | 344 | int dreamcast_write_chunk_header( const gchar *name, uint32_t length, FILE *f )
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nkeynes@477 | 345 | {
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nkeynes@477 | 346 | struct chunk_header head;
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nkeynes@477 | 347 |
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nkeynes@477 | 348 | memcpy( head.marker, "BLCK", 4 );
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nkeynes@477 | 349 | memset( head.name, 0, 8 );
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nkeynes@477 | 350 | memcpy( head.name, name, strlen(name) );
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nkeynes@477 | 351 | head.block_length = length;
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nkeynes@477 | 352 | return fwrite( &head, sizeof(head), 1, f );
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nkeynes@477 | 353 | }
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nkeynes@477 | 354 |
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nkeynes@477 | 355 |
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nkeynes@477 | 356 | frame_buffer_t dreamcast_load_preview( const gchar *filename )
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nkeynes@477 | 357 | {
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nkeynes@477 | 358 | int i;
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nkeynes@477 | 359 | FILE *f = fopen( filename, "r" );
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nkeynes@477 | 360 | if( f == NULL ) return NULL;
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nkeynes@736 | 361 |
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nkeynes@891 | 362 | int module_count = dreamcast_read_save_state_header(f, NULL, 0);
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nkeynes@477 | 363 | if( module_count <= 0 ) {
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nkeynes@736 | 364 | fclose(f);
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nkeynes@736 | 365 | return NULL;
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nkeynes@477 | 366 | }
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nkeynes@477 | 367 | for( i=0; i<module_count; i++ ) {
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nkeynes@736 | 368 | struct chunk_header head;
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nkeynes@736 | 369 | if( fread( &head, sizeof(head), 1, f ) != 1 ) {
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nkeynes@736 | 370 | fclose(f);
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nkeynes@736 | 371 | return NULL;
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nkeynes@736 | 372 | }
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nkeynes@736 | 373 | if( memcmp("BLCK", head.marker, 4) != 0 ) {
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nkeynes@736 | 374 | fclose(f);
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nkeynes@736 | 375 | return NULL;
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nkeynes@736 | 376 | }
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nkeynes@477 | 377 |
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nkeynes@736 | 378 | if( strcmp("PVR2", head.name) == 0 ) {
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nkeynes@736 | 379 | uint32_t buf_count;
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nkeynes@736 | 380 | int has_front;
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nkeynes@736 | 381 | fread( &buf_count, sizeof(buf_count), 1, f );
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nkeynes@736 | 382 | fread( &has_front, sizeof(has_front), 1, f );
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nkeynes@736 | 383 | if( buf_count != 0 && has_front ) {
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nkeynes@736 | 384 | frame_buffer_t result = read_png_from_stream(f);
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nkeynes@736 | 385 | fclose(f);
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nkeynes@736 | 386 | return result;
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nkeynes@736 | 387 | }
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nkeynes@736 | 388 | break;
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nkeynes@736 | 389 | } else {
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nkeynes@736 | 390 | fseek( f, head.block_length, SEEK_CUR );
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nkeynes@736 | 391 | }
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nkeynes@477 | 392 | }
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nkeynes@477 | 393 | return NULL;
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nkeynes@477 | 394 | }
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nkeynes@477 | 395 |
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nkeynes@18 | 396 | int dreamcast_load_state( const gchar *filename )
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nkeynes@15 | 397 | {
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nkeynes@17 | 398 | int i,j;
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nkeynes@477 | 399 | int module_count;
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nkeynes@891 | 400 | char error[128];
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nkeynes@17 | 401 | int have_read[MAX_MODULES];
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nkeynes@18 | 402 |
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nkeynes@477 | 403 | FILE *f = fopen( filename, "r" );
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nkeynes@18 | 404 | if( f == NULL ) return errno;
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nkeynes@15 | 405 |
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nkeynes@891 | 406 | module_count = dreamcast_read_save_state_header(f, error, sizeof(error));
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nkeynes@477 | 407 | if( module_count <= 0 ) {
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nkeynes@891 | 408 | ERROR( error );
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nkeynes@736 | 409 | fclose(f);
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nkeynes@736 | 410 | return 1;
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nkeynes@15 | 411 | }
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nkeynes@477 | 412 |
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nkeynes@17 | 413 | for( i=0; i<MAX_MODULES; i++ ) {
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nkeynes@736 | 414 | have_read[i] = 0;
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nkeynes@15 | 415 | }
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nkeynes@15 | 416 |
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nkeynes@477 | 417 | for( i=0; i<module_count; i++ ) {
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nkeynes@736 | 418 | struct chunk_header chunk;
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nkeynes@736 | 419 | fread( &chunk, sizeof(chunk), 1, f );
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nkeynes@736 | 420 | if( strncmp(chunk.marker, "BLCK", 4) != 0 ) {
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nkeynes@736 | 421 | ERROR( "%s save state is corrupted (missing block header %d)", APP_NAME, i );
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nkeynes@736 | 422 | fclose(f);
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nkeynes@736 | 423 | return 2;
|
nkeynes@736 | 424 | }
|
nkeynes@736 | 425 |
|
nkeynes@736 | 426 | /* Find the matching module by name */
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nkeynes@736 | 427 | for( j=0; j<num_modules; j++ ) {
|
nkeynes@736 | 428 | if( strcmp(modules[j]->name,chunk.name) == 0 ) {
|
nkeynes@736 | 429 | have_read[j] = 1;
|
nkeynes@736 | 430 | if( modules[j]->load == NULL ) {
|
nkeynes@736 | 431 | ERROR( "%s save state is corrupted (no loader for %s)", APP_NAME, modules[j]->name );
|
nkeynes@736 | 432 | fclose(f);
|
nkeynes@736 | 433 | return 2;
|
nkeynes@736 | 434 | } else if( modules[j]->load(f) != 0 ) {
|
nkeynes@736 | 435 | ERROR( "%s save state is corrupted (%s failed)", APP_NAME, modules[j]->name );
|
nkeynes@736 | 436 | fclose(f);
|
nkeynes@736 | 437 | return 2;
|
nkeynes@736 | 438 | }
|
nkeynes@736 | 439 | break;
|
nkeynes@736 | 440 | }
|
nkeynes@736 | 441 | }
|
nkeynes@736 | 442 | if( j == num_modules ) {
|
nkeynes@736 | 443 | fclose(f);
|
nkeynes@736 | 444 | ERROR( "%s save state contains unrecognized section", APP_NAME );
|
nkeynes@736 | 445 | return 2;
|
nkeynes@736 | 446 | }
|
nkeynes@17 | 447 | }
|
nkeynes@736 | 448 |
|
nkeynes@17 | 449 | /* Any modules that we didn't load - reset to the default state.
|
nkeynes@17 | 450 | * (ie it's not an error to skip a module if you don't actually
|
nkeynes@17 | 451 | * care about its state).
|
nkeynes@17 | 452 | */
|
nkeynes@17 | 453 | for( j=0; j<num_modules; j++ ) {
|
nkeynes@736 | 454 | if( have_read[j] == 0 && modules[j]->reset != NULL ) {
|
nkeynes@736 | 455 | modules[j]->reset();
|
nkeynes@736 | 456 | }
|
nkeynes@15 | 457 | }
|
nkeynes@18 | 458 | fclose(f);
|
nkeynes@18 | 459 | INFO( "Save state read from %s", filename );
|
nkeynes@422 | 460 | return 0;
|
nkeynes@15 | 461 | }
|
nkeynes@15 | 462 |
|
nkeynes@18 | 463 | int dreamcast_save_state( const gchar *filename )
|
nkeynes@15 | 464 | {
|
nkeynes@15 | 465 | int i;
|
nkeynes@18 | 466 | FILE *f;
|
nkeynes@15 | 467 | struct save_state_header header;
|
nkeynes@736 | 468 |
|
nkeynes@18 | 469 | f = fopen( filename, "w" );
|
nkeynes@18 | 470 | if( f == NULL )
|
nkeynes@736 | 471 | return errno;
|
nkeynes@15 | 472 | strcpy( header.magic, DREAMCAST_SAVE_MAGIC );
|
nkeynes@15 | 473 | header.version = DREAMCAST_SAVE_VERSION;
|
nkeynes@18 | 474 | header.module_count = 0;
|
nkeynes@18 | 475 |
|
nkeynes@18 | 476 | for( i=0; i<num_modules; i++ ) {
|
nkeynes@736 | 477 | if( modules[i]->save != NULL )
|
nkeynes@736 | 478 | header.module_count++;
|
nkeynes@18 | 479 | }
|
nkeynes@15 | 480 | fwrite( &header, sizeof(header), 1, f );
|
nkeynes@15 | 481 | for( i=0; i<num_modules; i++ ) {
|
nkeynes@736 | 482 | if( modules[i]->save != NULL ) {
|
nkeynes@736 | 483 | uint32_t blocklen, posn1, posn2;
|
nkeynes@736 | 484 | dreamcast_write_chunk_header( modules[i]->name, 0, f );
|
nkeynes@736 | 485 | posn1 = ftell(f);
|
nkeynes@736 | 486 | modules[i]->save(f);
|
nkeynes@736 | 487 | posn2 = ftell(f);
|
nkeynes@736 | 488 | blocklen = posn2 - posn1;
|
nkeynes@736 | 489 | fseek( f, posn1-4, SEEK_SET );
|
nkeynes@736 | 490 | fwrite( &blocklen, sizeof(blocklen), 1, f );
|
nkeynes@736 | 491 | fseek( f, posn2, SEEK_SET );
|
nkeynes@736 | 492 | }
|
nkeynes@15 | 493 | }
|
nkeynes@18 | 494 | fclose( f );
|
nkeynes@18 | 495 | INFO( "Save state written to %s", filename );
|
nkeynes@422 | 496 | return 0;
|
nkeynes@15 | 497 | }
|
nkeynes@15 | 498 |
|
nkeynes@953 | 499 | /********************* The Boot ROM address space **********************/
|
nkeynes@953 | 500 | static int32_t FASTCALL ext_bootrom_read_long( sh4addr_t addr )
|
nkeynes@953 | 501 | {
|
nkeynes@953 | 502 | return *((int32_t *)(dc_boot_rom + (addr&0x001FFFFF)));
|
nkeynes@953 | 503 | }
|
nkeynes@953 | 504 | static int32_t FASTCALL ext_bootrom_read_word( sh4addr_t addr )
|
nkeynes@953 | 505 | {
|
nkeynes@953 | 506 | return SIGNEXT16(*((int16_t *)(dc_boot_rom + (addr&0x001FFFFF))));
|
nkeynes@953 | 507 | }
|
nkeynes@953 | 508 | static int32_t FASTCALL ext_bootrom_read_byte( sh4addr_t addr )
|
nkeynes@953 | 509 | {
|
nkeynes@953 | 510 | return SIGNEXT8(*((int16_t *)(dc_boot_rom + (addr&0x001FFFFF))));
|
nkeynes@953 | 511 | }
|
nkeynes@953 | 512 | static void FASTCALL ext_bootrom_read_burst( unsigned char *dest, sh4addr_t addr )
|
nkeynes@953 | 513 | {
|
nkeynes@953 | 514 | memcpy( dest, dc_boot_rom +(addr&0x001FFFFF), 32 );
|
nkeynes@953 | 515 | }
|
nkeynes@953 | 516 |
|
nkeynes@953 | 517 | struct mem_region_fn mem_region_bootrom = {
|
nkeynes@953 | 518 | ext_bootrom_read_long, unmapped_write_long,
|
nkeynes@953 | 519 | ext_bootrom_read_word, unmapped_write_long,
|
nkeynes@953 | 520 | ext_bootrom_read_byte, unmapped_write_long,
|
nkeynes@953 | 521 | ext_bootrom_read_burst, unmapped_write_burst };
|
nkeynes@953 | 522 |
|
nkeynes@953 | 523 | /********************* The Flash RAM address space **********************/
|
nkeynes@953 | 524 | static int32_t FASTCALL ext_flashram_read_long( sh4addr_t addr )
|
nkeynes@953 | 525 | {
|
nkeynes@953 | 526 | return *((int32_t *)(dc_flash_ram + (addr&0x0001FFFF)));
|
nkeynes@953 | 527 | }
|
nkeynes@953 | 528 | static int32_t FASTCALL ext_flashram_read_word( sh4addr_t addr )
|
nkeynes@953 | 529 | {
|
nkeynes@953 | 530 | return SIGNEXT16(*((int16_t *)(dc_flash_ram + (addr&0x0001FFFF))));
|
nkeynes@953 | 531 | }
|
nkeynes@953 | 532 | static int32_t FASTCALL ext_flashram_read_byte( sh4addr_t addr )
|
nkeynes@953 | 533 | {
|
nkeynes@953 | 534 | return SIGNEXT8(*((int16_t *)(dc_flash_ram + (addr&0x0001FFFF))));
|
nkeynes@953 | 535 | }
|
nkeynes@953 | 536 | static void FASTCALL ext_flashram_write_long( sh4addr_t addr, uint32_t val )
|
nkeynes@953 | 537 | {
|
nkeynes@953 | 538 | *(uint32_t *)(dc_flash_ram + (addr&0x0001FFFF)) = val;
|
nkeynes@953 | 539 | asic_g2_write_word();
|
nkeynes@953 | 540 | }
|
nkeynes@953 | 541 | static void FASTCALL ext_flashram_write_word( sh4addr_t addr, uint32_t val )
|
nkeynes@953 | 542 | {
|
nkeynes@953 | 543 | *(uint16_t *)(dc_flash_ram + (addr&0x0001FFFF)) = (uint16_t)val;
|
nkeynes@953 | 544 | asic_g2_write_word();
|
nkeynes@953 | 545 | }
|
nkeynes@953 | 546 | static void FASTCALL ext_flashram_write_byte( sh4addr_t addr, uint32_t val )
|
nkeynes@953 | 547 | {
|
nkeynes@953 | 548 | *(uint8_t *)(dc_flash_ram + (addr&0x0001FFFF)) = (uint8_t)val;
|
nkeynes@953 | 549 | asic_g2_write_word();
|
nkeynes@953 | 550 | }
|
nkeynes@953 | 551 | static void FASTCALL ext_flashram_read_burst( unsigned char *dest, sh4addr_t addr )
|
nkeynes@953 | 552 | {
|
nkeynes@953 | 553 | memcpy( dest, dc_flash_ram+(addr&0x0001FFFF), 32 );
|
nkeynes@953 | 554 | }
|
nkeynes@953 | 555 | static void FASTCALL ext_flashram_write_burst( sh4addr_t addr, unsigned char *src )
|
nkeynes@953 | 556 | {
|
nkeynes@953 | 557 | memcpy( dc_flash_ram+(addr&0x0001FFFF), src, 32 );
|
nkeynes@953 | 558 | }
|
nkeynes@953 | 559 |
|
nkeynes@953 | 560 | struct mem_region_fn mem_region_flashram = { ext_flashram_read_long, ext_flashram_write_long,
|
nkeynes@953 | 561 | ext_flashram_read_word, ext_flashram_write_word,
|
nkeynes@953 | 562 | ext_flashram_read_byte, ext_flashram_write_byte,
|
nkeynes@953 | 563 | ext_flashram_read_burst, ext_flashram_write_burst };
|
nkeynes@953 | 564 |
|