nkeynes@26 | 1 | /**
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nkeynes@27 | 2 | * $Id: loader.c,v 1.8 2005-12-25 01:28:36 nkeynes Exp $
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nkeynes@1 | 3 | *
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nkeynes@26 | 4 | * File loading routines, mostly for loading demos without going through the
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nkeynes@26 | 5 | * whole procedure of making a CD image for them.
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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@1 | 18 | */
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nkeynes@1 | 19 |
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nkeynes@1 | 20 | #include <stdio.h>
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nkeynes@1 | 21 | #include <fcntl.h>
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nkeynes@1 | 22 | #include <sys/stat.h>
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nkeynes@1 | 23 | #include <errno.h>
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nkeynes@1 | 24 | #include <stdint.h>
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nkeynes@25 | 25 | #include "gui/gui.h"
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nkeynes@26 | 26 | #include "mem.h"
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nkeynes@1 | 27 | #include "sh4core.h"
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nkeynes@26 | 28 | #include "bootstrap.h"
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nkeynes@1 | 29 |
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nkeynes@26 | 30 | char bootstrap_magic[32] = "SEGA SEGAKATANA SEGA ENTERPRISES";
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nkeynes@1 | 31 | char iso_magic[6] = "\001CD001";
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nkeynes@26 | 32 | char *file_loader_extensions[][2] = {
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nkeynes@26 | 33 | { "sbi", "Self Boot Inducer" },
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nkeynes@26 | 34 | { "bin", "SH4 Bin file" },
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nkeynes@26 | 35 | { NULL, NULL } };
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nkeynes@26 | 36 |
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nkeynes@26 | 37 | #define BOOTSTRAP_LOAD_ADDR 0x8C008000
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nkeynes@26 | 38 | #define BOOTSTRAP_SIZE 32768
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nkeynes@26 | 39 |
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nkeynes@26 | 40 | #define BINARY_LOAD_ADDR 0x8C010000
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nkeynes@1 | 41 |
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nkeynes@1 | 42 | #define CDI_V2 0x80000004
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nkeynes@1 | 43 | #define CDI_V3 0x80000005
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nkeynes@1 | 44 |
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nkeynes@26 | 45 | gboolean file_load_magic( const gchar *filename )
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nkeynes@1 | 46 | {
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nkeynes@1 | 47 | char buf[32];
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nkeynes@1 | 48 | uint32_t tmpa[2];
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nkeynes@1 | 49 | struct stat st;
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nkeynes@1 | 50 |
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nkeynes@1 | 51 | int fd = open( filename, O_RDONLY );
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nkeynes@1 | 52 | if( fd == -1 ) {
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nkeynes@1 | 53 | ERROR( "Unable to open file: '%s' (%s)", filename,
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nkeynes@1 | 54 | strerror(errno) );
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nkeynes@26 | 55 | return FALSE;
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nkeynes@1 | 56 | }
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nkeynes@1 | 57 |
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nkeynes@1 | 58 | fstat( fd, &st );
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nkeynes@1 | 59 | if( st.st_size < 32768 ) {
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nkeynes@1 | 60 | ERROR( "File '%s' too small to be a dreamcast image", filename );
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nkeynes@1 | 61 | close(fd);
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nkeynes@26 | 62 | return FALSE;
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nkeynes@1 | 63 | }
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nkeynes@1 | 64 |
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nkeynes@1 | 65 | /* begin magic */
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nkeynes@1 | 66 | if( read( fd, buf, 32 ) != 32 ) {
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nkeynes@1 | 67 | ERROR( "Unable to read from file '%s'", filename );
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nkeynes@1 | 68 | close(fd);
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nkeynes@26 | 69 | return FALSE;
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nkeynes@1 | 70 | }
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nkeynes@26 | 71 | if( memcmp( buf, bootstrap_magic, 32 ) == 0 ) {
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nkeynes@1 | 72 | /* we have a DC bootstrap */
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nkeynes@1 | 73 | if( st.st_size == BOOTSTRAP_SIZE ) {
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nkeynes@1 | 74 | char *load = mem_get_region( BOOTSTRAP_LOAD_ADDR );
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nkeynes@1 | 75 | lseek( fd, 0, SEEK_SET );
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nkeynes@1 | 76 | read( fd, load, BOOTSTRAP_SIZE );
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nkeynes@26 | 77 | bootstrap_dump( load );
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nkeynes@1 | 78 | sh4_set_pc( BOOTSTRAP_LOAD_ADDR + 0x300 );
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nkeynes@27 | 79 | gtk_gui_update();
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nkeynes@1 | 80 | } else {
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nkeynes@1 | 81 | /* look for a valid ISO9660 header */
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nkeynes@1 | 82 | lseek( fd, 32768, SEEK_SET );
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nkeynes@1 | 83 | read( fd, buf, 8 );
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nkeynes@1 | 84 | if( memcmp( buf, iso_magic, 6 ) == 0 ) {
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nkeynes@1 | 85 | /* Alright, got it */
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nkeynes@1 | 86 | INFO( "Loading ISO9660 filesystem from '%s'",
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nkeynes@1 | 87 | filename );
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nkeynes@1 | 88 | }
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nkeynes@1 | 89 | }
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nkeynes@26 | 90 | } else if( memcmp( buf, "PK\x03\x04", 4 ) == 0 ) {
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nkeynes@26 | 91 | /* ZIP file, aka SBI file */
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nkeynes@26 | 92 | WARN( "SBI files not supported yet" );
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nkeynes@1 | 93 | } else {
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nkeynes@26 | 94 | /* Assume raw binary */
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nkeynes@26 | 95 | file_load_binary( filename );
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nkeynes@26 | 96 | }
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nkeynes@1 | 97 | close(fd);
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nkeynes@26 | 98 | return TRUE;
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nkeynes@1 | 99 | }
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nkeynes@19 | 100 |
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nkeynes@26 | 101 | int file_load_binary( const gchar *filename ) {
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nkeynes@26 | 102 | mem_load_block( filename, BINARY_LOAD_ADDR, -1 );
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nkeynes@26 | 103 | sh4_set_pc( BINARY_LOAD_ADDR );
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nkeynes@27 | 104 | gtk_gui_update();
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nkeynes@19 | 105 | }
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