1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2009-2010 Shao Miller - All Rights Reserved 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation, Inc., 53 Temple Place Ste 330, 8 * Boston MA 02111-1307, USA; either version 2 of the License, or 9 * (at your option) any later version; incorporated herein by reference. 10 * 11 * ----------------------------------------------------------------------- */ 12 13 /* 14 * eltorito.h 15 * 16 * EDD-4 El Torito structures and debugging routines 17 */ 18 19 #include <stdint.h> 20 #include "compiler.h" 21 22 /* EDD-4 Bootable Optical Disc Drive Boot Volume Descriptor */ 23 MEMDISK_PACKED_PREFIX 24 struct edd4_bvd { 25 uint8_t boot_rec_ind; /* Boot Record Indicator */ 26 uint8_t iso9660_id[5]; /* ISO9660 ID */ 27 uint8_t ver; /* Descriptor Version */ 28 uint8_t eltorito[32]; /* "EL TORITO" etc. */ 29 uint8_t res1[32]; /* Reserved */ 30 uint32_t boot_cat; /* Boot catalog sector */ 31 uint8_t res2[1973]; /* Reserved */ 32 } MEMDISK_PACKED_POSTFIX; 33 34 MEMDISK_PACKED_PREFIX 35 struct validation_entry { 36 uint8_t header_id; /* Header ID */ 37 uint8_t platform_id; /* Platform ID */ 38 uint16_t res1; /* Reserved */ 39 uint8_t id_string[24]; /* Manufacturer */ 40 uint16_t checksum; /* Sums with whole record to zero */ 41 uint8_t key55; /* Key byte 0x55 */ 42 uint8_t keyAA; /* Key byte 0xAA */ 43 } MEMDISK_PACKED_POSTFIX; 44 45 MEMDISK_PACKED_PREFIX 46 struct initial_entry { 47 uint8_t header_id; /* Header ID */ 48 uint8_t media_type; /* Media type */ 49 uint16_t load_seg; /* Load segment */ 50 uint8_t system_type; /* (Filesystem ID) */ 51 uint8_t res1; /* Reserved */ 52 uint16_t sect_count; /* Emulated sectors to load */ 53 uint32_t load_block; /* Starting sector of image */ 54 uint8_t res2[4]; /* Reserved */ 55 } MEMDISK_PACKED_POSTFIX; 56 57 /* EDD-4 Bootable Optical Disc Drive Boot Catalog (fixed-size portions) */ 58 MEMDISK_PACKED_PREFIX 59 struct edd4_bootcat { 60 struct validation_entry validation_entry; 61 struct initial_entry initial_entry; 62 } MEMDISK_PACKED_POSTFIX; 63 64 /* EDD-4 CD Specification Packet */ 65 MEMDISK_PACKED_PREFIX 66 struct edd4_cd_pkt { 67 uint8_t size; /* Packet size */ 68 uint8_t type; /* Boot media type (flags) */ 69 uint8_t driveno; /* INT 13h drive number */ 70 uint8_t controller; /* Controller index */ 71 uint32_t start; /* Starting LBA of image */ 72 uint16_t devno; /* Device number */ 73 uint16_t userbuf; /* User buffer segment */ 74 uint16_t load_seg; /* Load segment */ 75 uint16_t sect_count; /* Emulated sectors to load */ 76 uint8_t geom1; /* Cylinders bits 0 thru 7 */ 77 uint8_t geom2; /* Sects/track 0 thru 5, cyls 8, 9 */ 78 uint8_t geom3; /* Heads */ 79 } MEMDISK_PACKED_POSTFIX; 80 81
