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-rw-r--r--memdisk/eltorito.h83
1 files changed, 83 insertions, 0 deletions
diff --git a/memdisk/eltorito.h b/memdisk/eltorito.h
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+++ b/memdisk/eltorito.h
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+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2009 Shao Miller - All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+ * Boston MA 02111-1307, USA; either version 2 of the License, or
+ * (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * eltorito.h
+ *
+ * EDD-4 El Torito structures and debugging routines
+ */
+
+#include <stdint.h>
+
+/*
+ * Uncomment for El Torito debugging
+ *
+ * #define DBG_ELTORITO 1
+ */
+
+#ifdef DBG_ELTORITO
+extern void eltorito_dump(uint32_t);
+#endif
+
+/* EDD-4 Bootable Optical Disc Drive Boot Volume Descriptor */
+struct edd4_bvd {
+ uint8_t boot_rec_ind; /* Boot Record Indicator */
+ uint8_t iso9660_id[5]; /* ISO9660 ID */
+ uint8_t ver; /* Descriptor Version */
+ uint8_t eltorito[32]; /* "EL TORITO" etc. */
+ uint8_t res1[32]; /* Reserved */
+ uint32_t boot_cat; /* Boot catalog sector */
+ uint8_t res2[1973]; /* Reserved */
+} __attribute__ ((packed));
+
+struct validation_entry {
+ uint8_t header_id; /* Header ID */
+ uint8_t platform_id; /* Platform ID */
+ uint16_t res1; /* Reserved */
+ uint8_t id_string[24]; /* Manufacturer */
+ uint16_t checksum; /* Sums with whole record to zero */
+ uint8_t key55; /* Key byte 0x55 */
+ uint8_t keyAA; /* Key byte 0xAA */
+} __attribute__ ((packed));
+
+struct initial_entry {
+ uint8_t header_id; /* Header ID */
+ uint8_t media_type; /* Media type */
+ uint16_t load_seg; /* Load segment */
+ uint8_t system_type; /* (Filesystem ID) */
+ uint8_t res1; /* Reserved */
+ uint16_t sect_count; /* Emulated sectors to load */
+ uint32_t load_block; /* Starting sector of image */
+ uint8_t res2[4]; /* Reserved */
+} __attribute__ ((packed));
+
+/* EDD-4 Bootable Optical Disc Drive Boot Catalog (fixed-size portions) */
+struct edd4_bootcat {
+ struct validation_entry validation_entry;
+ struct initial_entry initial_entry;
+} __attribute__ ((packed));
+
+/* EDD-4 CD Specification Packet */
+struct edd4_cd_pkt {
+ uint8_t size; /* Packet size */
+ uint8_t type; /* Boot media type (flags) */
+ uint8_t driveno; /* INT 13h drive number */
+ uint8_t controller; /* Controller index */
+ uint32_t start; /* Starting LBA of image */
+ uint16_t devno; /* Device number */
+ uint16_t userbuf; /* User buffer segment */
+ uint16_t load_seg; /* Load segment */
+ uint16_t sect_count; /* Emulated sectors to load */
+ uint8_t geom1; /* Cylinders bits 0 thru 7 */
+ uint8_t geom2; /* Sects/track 0 thru 5, cyls 8, 9 */
+ uint8_t geom3; /* Heads */
+} __attribute__ ((packed));