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/* ----------------------------------------------------------------------- *
*
* Copyright 2001-2009 H. Peter Anvin - All Rights Reserved
* Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
* Portions copyright 2009-2010 Shao Miller
* [El Torito code, mBFT, "safe hook"]
*
* 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.
*
* ----------------------------------------------------------------------- */
/* These structures are common to MEMDISK and MDISKCHK.COM */
#include <stdint.h>
#include "compiler.h"
struct seg_off {
uint16_t offset;
uint16_t segment;
};
typedef union {
struct seg_off seg_off;
uint32_t uint32;
} real_addr_t;
/* Forward declaration */
struct mBFT;
MEMDISK_PACKED_PREFIX
struct safe_hook {
uint8_t jump[3]; /* Max. three bytes for jump */
uint8_t signature[8]; /* "$INT13SF" */
uint8_t vendor[8]; /* "MEMDISK " */
real_addr_t old_hook; /* SEG:OFF for previous INT 13h hook */
uint32_t flags; /* "Safe hook" flags */
/* The next field is a MEMDISK extension to the "safe hook" structure */
uint32_t mbft;
} MEMDISK_PACKED_POSTFIX;
struct memdisk_header {
uint16_t int13_offs;
uint16_t int15_offs;
uint16_t patch_offs;
uint16_t total_size;
uint16_t iret_offs;
struct safe_hook safe_hook;
};
MEMDISK_PACKED_PREFIX
/* EDD disk parameter table */
struct edd_dpt {
uint16_t len; /* Length of table */
uint16_t flags; /* Information flags */
uint32_t c; /* Physical cylinders (count!) */
uint32_t h; /* Physical heads (count!) */
uint32_t s; /* Physical sectors/track (count!) */
uint64_t sectors; /* Total sectors */
uint16_t bytespersec; /* Bytes/sector */
real_addr_t dpte; /* DPTE pointer */
uint16_t dpikey; /* Device Path Info magic */
uint8_t dpilen; /* Device Path Info length */
uint8_t res1; /* Reserved */
uint16_t res2; /* Reserved */
uint8_t bustype[4]; /* Host bus type */
uint8_t inttype[8]; /* Interface type */
uint64_t intpath; /* Interface path */
uint64_t devpath[2]; /* Device path (double QuadWord!) */
uint8_t res3; /* Reserved */
uint8_t chksum; /* DPI checksum */
} MEMDISK_PACKED_POSTFIX;
/* Requirement for struct edd4_cd_pkt */
#include "../memdisk/eltorito.h"
/* Official MEMDISK Info structure ("MDI") */
MEMDISK_PACKED_PREFIX
struct mdi {
const uint16_t bytes;
const uint8_t version_minor;
const uint8_t version_major;
uint32_t diskbuf;
uint32_t disksize;
real_addr_t cmdline;
real_addr_t oldint13;
real_addr_t oldint15;
uint16_t olddosmem;
uint8_t bootloaderid;
uint8_t sector_shift;
uint16_t dpt_ptr;
} MEMDISK_PACKED_POSTFIX;
/* Requirement for struct acpi_description_header */
#include "../memdisk/acpi.h"
MEMDISK_PACKED_PREFIX
struct mBFT {
struct acpi_description_header acpi;
uint32_t safe_hook; /* "Safe hook" physical address */
struct mdi mdi;
} MEMDISK_PACKED_POSTFIX;
/* The Disk Parameter Table may be required */
typedef union {
struct hd_dpt {
uint16_t max_cyl; /* Max cylinder */
uint8_t max_head; /* Max head */
uint8_t junk1[5]; /* Obsolete junk, leave at zero */
uint8_t ctrl; /* Control byte */
uint8_t junk2[7]; /* More obsolete junk */
} hd;
struct fd_dpt {
uint8_t specify1; /* "First specify byte" */
uint8_t specify2; /* "Second specify byte" */
uint8_t delay; /* Delay until motor turn off */
uint8_t sectors; /* Sectors/track */
uint8_t bps; /* Bytes/sector (02h = 512) */
uint8_t isgap; /* Length of intersector gap */
uint8_t dlen; /* Data length (0FFh) */
uint8_t fgap; /* Formatting gap */
uint8_t ffill; /* Format fill byte */
uint8_t settle; /* Head settle time (ms) */
uint8_t mstart; /* Motor start time */
uint8_t maxtrack; /* Maximum track number */
uint8_t rate; /* Data transfer rate */
uint8_t cmos; /* CMOS type */
uint8_t pad[2];
uint32_t old_fd_dpt; /* Extension: pointer to old INT 1Eh */
} fd;
} dpt_t;
MEMDISK_PACKED_PREFIX
struct patch_area {
struct mdi mdi;
uint8_t driveshiftlimit; /* Do not shift drives above this region */
uint8_t _pad2; /* Pad to DWORD */
uint16_t _pad3; /* Pad to QWORD */
uint16_t memint1588;
uint16_t cylinders;
uint16_t heads;
uint32_t sectors;
uint32_t mem1mb;
uint32_t mem16mb;
uint8_t driveno;
uint8_t drivetype;
uint8_t drivecnt;
uint8_t configflags;
#define CONFIG_READONLY 0x01
#define CONFIG_RAW 0x02
#define CONFIG_SAFEINT 0x04
#define CONFIG_BIGRAW 0x08 /* MUST be 8! */
#define CONFIG_MODEMASK 0x0e
uint16_t mystack;
uint16_t statusptr;
dpt_t dpt;
struct edd_dpt edd_dpt;
struct edd4_cd_pkt cd_pkt; /* Only really in a memdisk_iso_* hook */
} MEMDISK_PACKED_POSTFIX;
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