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The GUID (Globally Unique Identifier) Partition Table (GPT) is a part of EFI. See http://en.wikipedia.org/wiki/GUID_Partition_Table Based on linux/fs/partitions/efi.[ch] Signed-off-by: Richard Retanubun <RichardRetanubun@RugggedCom.com>
139 lines
4.6 KiB
C
139 lines
4.6 KiB
C
/*
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* Copyright (C) 2008 RuggedCom, Inc.
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* Richard Retanubun <RichardRetanubun@RuggedCom.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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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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*
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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,
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* MA 02111-1307 USA
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*/
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/*
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* See also linux/fs/partitions/efi.h
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*
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* EFI GUID Partition Table
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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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*/
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#ifndef _DISK_PART_EFI_H
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#define _DISK_PART_EFI_H
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#define MSDOS_MBR_SIGNATURE 0xAA55
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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 GPT_BLOCK_SIZE 512
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#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
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#define GPT_HEADER_REVISION_V1 0x00010000
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#define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
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#define GPT_ENTRY_NAME "gpt"
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#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
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((efi_guid_t) \
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{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
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(b) & 0xff, ((b) >> 8) & 0xff, \
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(c) & 0xff, ((c) >> 8) & 0xff, \
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(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
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#define PARTITION_SYSTEM_GUID \
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EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
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0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
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#define LEGACY_MBR_PARTITION_GUID \
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EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
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0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)
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#define PARTITION_MSFT_RESERVED_GUID \
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EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \
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0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE)
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#define PARTITION_BASIC_DATA_GUID \
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EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \
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0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7)
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#define PARTITION_LINUX_RAID_GUID \
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EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \
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0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)
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#define PARTITION_LINUX_SWAP_GUID \
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EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \
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0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f)
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#define PARTITION_LINUX_LVM_GUID \
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EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \
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0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28)
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/* linux/include/efi.h */
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typedef unsigned short efi_char16_t;
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typedef struct {
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unsigned char b[16];
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} efi_guid_t;
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/* based on linux/include/genhd.h */
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struct partition {
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unsigned char boot_ind; /* 0x80 - active */
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unsigned char head; /* starting head */
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unsigned char sector; /* starting sector */
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unsigned char cyl; /* starting cylinder */
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unsigned char sys_ind; /* What partition type */
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unsigned char end_head; /* end head */
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unsigned char end_sector; /* end sector */
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unsigned char end_cyl; /* end cylinder */
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unsigned char start_sect[4]; /* starting sector counting from 0 */
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unsigned char nr_sects[4]; /* nr of sectors in partition */
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} __attribute__ ((packed));
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/* based on linux/fs/partitions/efi.h */
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typedef struct _gpt_header {
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unsigned char signature[8];
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unsigned char revision[4];
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unsigned char header_size[4];
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unsigned char header_crc32[4];
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unsigned char reserved1[4];
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unsigned char my_lba[8];
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unsigned char alternate_lba[8];
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unsigned char first_usable_lba[8];
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unsigned char last_usable_lba[8];
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efi_guid_t disk_guid;
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unsigned char partition_entry_lba[8];
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unsigned char num_partition_entries[4];
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unsigned char sizeof_partition_entry[4];
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unsigned char partition_entry_array_crc32[4];
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unsigned char 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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unsigned long long required_to_function:1;
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unsigned long long reserved:47;
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unsigned long long 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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unsigned char starting_lba[8];
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unsigned char ending_lba[8];
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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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}
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__attribute__ ((packed)) gpt_entry;
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typedef struct _legacy_mbr {
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unsigned char boot_code[440];
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unsigned char unique_mbr_signature[4];
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unsigned char unknown[2];
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struct partition partition_record[4];
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unsigned char signature[2];
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} __attribute__ ((packed)) legacy_mbr;
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#endif /* _DISK_PART_EFI_H */
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