1 /* ----------------------------------------------------------------------- *
3 * Copyright 2009 Shao Miller - All Rights Reserved
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.
11 * ----------------------------------------------------------------------- */
16 * EDD-4 El Torito structures and debugging routines
22 * Uncomment for El Torito debugging
24 * #define DBG_ELTORITO 1
28 extern void eltorito_dump(uint32_t);
31 /* EDD-4 Bootable Optical Disc Drive Boot Volume Descriptor */
33 uint8_t boot_rec_ind; /* Boot Record Indicator */
34 uint8_t iso9660_id[5]; /* ISO9660 ID */
35 uint8_t ver; /* Descriptor Version */
36 uint8_t eltorito[32]; /* "EL TORITO" etc. */
37 uint8_t res1[32]; /* Reserved */
38 uint32_t boot_cat; /* Boot catalog sector */
39 uint8_t res2[1973]; /* Reserved */
40 } __attribute__ ((packed));
42 struct validation_entry {
43 uint8_t header_id; /* Header ID */
44 uint8_t platform_id; /* Platform ID */
45 uint16_t res1; /* Reserved */
46 uint8_t id_string[24]; /* Manufacturer */
47 uint16_t checksum; /* Sums with whole record to zero */
48 uint8_t key55; /* Key byte 0x55 */
49 uint8_t keyAA; /* Key byte 0xAA */
50 } __attribute__ ((packed));
52 struct initial_entry {
53 uint8_t header_id; /* Header ID */
54 uint8_t media_type; /* Media type */
55 uint16_t load_seg; /* Load segment */
56 uint8_t system_type; /* (Filesystem ID) */
57 uint8_t res1; /* Reserved */
58 uint16_t sect_count; /* Emulated sectors to load */
59 uint32_t load_block; /* Starting sector of image */
60 uint8_t res2[4]; /* Reserved */
61 } __attribute__ ((packed));
63 /* EDD-4 Bootable Optical Disc Drive Boot Catalog (fixed-size portions) */
65 struct validation_entry validation_entry;
66 struct initial_entry initial_entry;
67 } __attribute__ ((packed));
69 /* EDD-4 CD Specification Packet */
71 uint8_t size; /* Packet size */
72 uint8_t type; /* Boot media type (flags) */
73 uint8_t driveno; /* INT 13h drive number */
74 uint8_t controller; /* Controller index */
75 uint32_t start; /* Starting LBA of image */
76 uint16_t devno; /* Device number */
77 uint16_t userbuf; /* User buffer segment */
78 uint16_t load_seg; /* Load segment */
79 uint16_t sect_count; /* Emulated sectors to load */
80 uint8_t geom1; /* Cylinders bits 0 thru 7 */
81 uint8_t geom2; /* Sects/track 0 thru 5, cyls 8, 9 */
82 uint8_t geom3; /* Heads */
83 } __attribute__ ((packed));