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/*
gpt.[ch]
Copyright (C) 2000-2001 Dell Computer Corporation <Matt_Domsch@dell.com>
EFI GUID Partition Table handling
Per Intel EFI Specification v1.02
http://developer.intel.com/technology/efi/efi.htm
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; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _GPT_H
#define _GPT_H
#include <inttypes.h>
#include "partx.h"
#include "dos.h"
#include "efi.h"
#define EFI_PMBR_OSTYPE_EFI 0xEF
#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
#define MSDOS_MBR_SIGNATURE 0xaa55
#define GPT_BLOCK_SIZE 512
#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
#define GPT_HEADER_REVISION_V1_02 0x00010200
#define GPT_HEADER_REVISION_V1_00 0x00010000
#define GPT_HEADER_REVISION_V0_99 0x00009900
#define GPT_PRIMARY_PARTITION_TABLE_LBA 1
typedef struct _gpt_header {
uint64_t signature;
uint32_t revision;
uint32_t header_size;
uint32_t header_crc32;
uint32_t reserved1;
uint64_t my_lba;
uint64_t alternate_lba;
uint64_t first_usable_lba;
uint64_t last_usable_lba;
efi_guid_t disk_guid;
uint64_t partition_entry_lba;
uint32_t num_partition_entries;
uint32_t sizeof_partition_entry;
uint32_t partition_entry_array_crc32;
uint8_t reserved2[GPT_BLOCK_SIZE - 92];
} __attribute__ ((packed)) gpt_header;
typedef struct _gpt_entry_attributes {
uint64_t required_to_function:1;
uint64_t reserved:47;
uint64_t type_guid_specific:16;
} __attribute__ ((packed)) gpt_entry_attributes;
typedef struct _gpt_entry {
efi_guid_t partition_type_guid;
efi_guid_t unique_partition_guid;
uint64_t starting_lba;
uint64_t ending_lba;
gpt_entry_attributes attributes;
efi_char16_t partition_name[72 / sizeof(efi_char16_t)];
} __attribute__ ((packed)) gpt_entry;
/*
These values are only defaults. The actual on-disk structures
may define different sizes, so use those unless creating a new GPT disk!
*/
#define GPT_DEFAULT_RESERVED_PARTITION_ENTRY_ARRAY_SIZE 16384
/*
Number of actual partition entries should be calculated
as:
*/
#define GPT_DEFAULT_RESERVED_PARTITION_ENTRIES \
(GPT_DEFAULT_RESERVED_PARTITION_ENTRY_ARRAY_SIZE / \
sizeof(gpt_entry))
/* Protected Master Boot Record & Legacy MBR share same structure */
/* Needs to be packed because the u16s force misalignment. */
typedef struct _legacy_mbr {
uint8_t bootcode[440];
uint32_t unique_mbr_signature;
uint16_t unknown;
struct partition partition[4];
uint16_t signature;
} __attribute__ ((packed)) legacy_mbr;
#define EFI_GPT_PRIMARY_PARTITION_TABLE_LBA 1
/* Functions */
int read_gpt_pt (int fd, struct slice all, struct slice *sp, int ns);
#endif
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-indent-level: 4
* c-brace-imaginary-offset: 0
* c-brace-offset: -4
* c-argdecl-indent: 4
* c-label-offset: -4
* c-continued-statement-offset: 4
* c-continued-brace-offset: 0
* indent-tabs-mode: nil
* tab-width: 8
* End:
*/
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