filename | src/loader.c |
changeset | 27:1ef09a52cd1e |
prev | 26:ad258e3daaa5 |
next | 88:0a1bd43fa4ad |
author | nkeynes |
date | Thu Jan 12 11:30:19 2006 +0000 (18 years ago) |
permissions | -rw-r--r-- |
last change | Render multiple samples per shot, should be mildly faster Move timer logic down into armcore Minor tweaks |
file | annotate | diff | log | raw |
nkeynes@26 | 1 | /** |
nkeynes@27 | 2 | * $Id: loader.c,v 1.8 2005-12-25 01:28:36 nkeynes Exp $ |
nkeynes@1 | 3 | * |
nkeynes@26 | 4 | * File loading routines, mostly for loading demos without going through the |
nkeynes@26 | 5 | * whole procedure of making a CD image for them. |
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@1 | 18 | */ |
nkeynes@1 | 19 | |
nkeynes@1 | 20 | #include <stdio.h> |
nkeynes@1 | 21 | #include <fcntl.h> |
nkeynes@1 | 22 | #include <sys/stat.h> |
nkeynes@1 | 23 | #include <errno.h> |
nkeynes@1 | 24 | #include <stdint.h> |
nkeynes@25 | 25 | #include "gui/gui.h" |
nkeynes@26 | 26 | #include "mem.h" |
nkeynes@1 | 27 | #include "sh4core.h" |
nkeynes@26 | 28 | #include "bootstrap.h" |
nkeynes@1 | 29 | |
nkeynes@26 | 30 | char bootstrap_magic[32] = "SEGA SEGAKATANA SEGA ENTERPRISES"; |
nkeynes@1 | 31 | char iso_magic[6] = "\001CD001"; |
nkeynes@26 | 32 | char *file_loader_extensions[][2] = { |
nkeynes@26 | 33 | { "sbi", "Self Boot Inducer" }, |
nkeynes@26 | 34 | { "bin", "SH4 Bin file" }, |
nkeynes@26 | 35 | { NULL, NULL } }; |
nkeynes@26 | 36 | |
nkeynes@26 | 37 | #define BOOTSTRAP_LOAD_ADDR 0x8C008000 |
nkeynes@26 | 38 | #define BOOTSTRAP_SIZE 32768 |
nkeynes@26 | 39 | |
nkeynes@26 | 40 | #define BINARY_LOAD_ADDR 0x8C010000 |
nkeynes@1 | 41 | |
nkeynes@1 | 42 | #define CDI_V2 0x80000004 |
nkeynes@1 | 43 | #define CDI_V3 0x80000005 |
nkeynes@1 | 44 | |
nkeynes@26 | 45 | gboolean file_load_magic( const gchar *filename ) |
nkeynes@1 | 46 | { |
nkeynes@1 | 47 | char buf[32]; |
nkeynes@1 | 48 | uint32_t tmpa[2]; |
nkeynes@1 | 49 | struct stat st; |
nkeynes@1 | 50 | |
nkeynes@1 | 51 | int fd = open( filename, O_RDONLY ); |
nkeynes@1 | 52 | if( fd == -1 ) { |
nkeynes@1 | 53 | ERROR( "Unable to open file: '%s' (%s)", filename, |
nkeynes@1 | 54 | strerror(errno) ); |
nkeynes@26 | 55 | return FALSE; |
nkeynes@1 | 56 | } |
nkeynes@1 | 57 | |
nkeynes@1 | 58 | fstat( fd, &st ); |
nkeynes@1 | 59 | if( st.st_size < 32768 ) { |
nkeynes@1 | 60 | ERROR( "File '%s' too small to be a dreamcast image", filename ); |
nkeynes@1 | 61 | close(fd); |
nkeynes@26 | 62 | return FALSE; |
nkeynes@1 | 63 | } |
nkeynes@1 | 64 | |
nkeynes@1 | 65 | /* begin magic */ |
nkeynes@1 | 66 | if( read( fd, buf, 32 ) != 32 ) { |
nkeynes@1 | 67 | ERROR( "Unable to read from file '%s'", filename ); |
nkeynes@1 | 68 | close(fd); |
nkeynes@26 | 69 | return FALSE; |
nkeynes@1 | 70 | } |
nkeynes@26 | 71 | if( memcmp( buf, bootstrap_magic, 32 ) == 0 ) { |
nkeynes@1 | 72 | /* we have a DC bootstrap */ |
nkeynes@1 | 73 | if( st.st_size == BOOTSTRAP_SIZE ) { |
nkeynes@1 | 74 | char *load = mem_get_region( BOOTSTRAP_LOAD_ADDR ); |
nkeynes@1 | 75 | lseek( fd, 0, SEEK_SET ); |
nkeynes@1 | 76 | read( fd, load, BOOTSTRAP_SIZE ); |
nkeynes@26 | 77 | bootstrap_dump( load ); |
nkeynes@1 | 78 | sh4_set_pc( BOOTSTRAP_LOAD_ADDR + 0x300 ); |
nkeynes@27 | 79 | gtk_gui_update(); |
nkeynes@1 | 80 | } else { |
nkeynes@1 | 81 | /* look for a valid ISO9660 header */ |
nkeynes@1 | 82 | lseek( fd, 32768, SEEK_SET ); |
nkeynes@1 | 83 | read( fd, buf, 8 ); |
nkeynes@1 | 84 | if( memcmp( buf, iso_magic, 6 ) == 0 ) { |
nkeynes@1 | 85 | /* Alright, got it */ |
nkeynes@1 | 86 | INFO( "Loading ISO9660 filesystem from '%s'", |
nkeynes@1 | 87 | filename ); |
nkeynes@1 | 88 | } |
nkeynes@1 | 89 | } |
nkeynes@26 | 90 | } else if( memcmp( buf, "PK\x03\x04", 4 ) == 0 ) { |
nkeynes@26 | 91 | /* ZIP file, aka SBI file */ |
nkeynes@26 | 92 | WARN( "SBI files not supported yet" ); |
nkeynes@1 | 93 | } else { |
nkeynes@26 | 94 | /* Assume raw binary */ |
nkeynes@26 | 95 | file_load_binary( filename ); |
nkeynes@26 | 96 | } |
nkeynes@1 | 97 | close(fd); |
nkeynes@26 | 98 | return TRUE; |
nkeynes@1 | 99 | } |
nkeynes@19 | 100 | |
nkeynes@26 | 101 | int file_load_binary( const gchar *filename ) { |
nkeynes@26 | 102 | mem_load_block( filename, BINARY_LOAD_ADDR, -1 ); |
nkeynes@26 | 103 | sh4_set_pc( BINARY_LOAD_ADDR ); |
nkeynes@27 | 104 | gtk_gui_update(); |
nkeynes@19 | 105 | } |
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