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