1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /************************************************************ 3 * EFI GUID Partition Table 4 * Per Intel EFI Specification v1.02 5 * http://developer.intel.com/technology/efi/efi.htm 6 * 7 * By Matt Domsch <Matt_Domsch@dell.com> Fri Sep 22 22:15:56 CDT 2000 8 * Copyright 2000,2001 Dell Inc. 9 ************************************************************/ 10 11 #ifndef FS_PART_EFI_H_INCLUDED 12 #define FS_PART_EFI_H_INCLUDED 13 14 #include <linux/types.h> 15 #include <linux/fs.h> 16 #include <linux/genhd.h> 17 #include <linux/kernel.h> 18 #include <linux/major.h> 19 #include <linux/string.h> 20 #include <linux/efi.h> 21 #include <linux/compiler.h> 22 23 #define MSDOS_MBR_SIGNATURE 0xaa55 24 #define EFI_PMBR_OSTYPE_EFI 0xEF 25 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE 26 27 #define GPT_MBR_PROTECTIVE 1 28 #define GPT_MBR_HYBRID 2 29 30 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL 31 #define GPT_HEADER_REVISION_V1 0x00010000 32 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1 33 34 #define PARTITION_SYSTEM_GUID \ 35 EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \ 36 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) 37 #define LEGACY_MBR_PARTITION_GUID \ 38 EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \ 39 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F) 40 #define PARTITION_MSFT_RESERVED_GUID \ 41 EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \ 42 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE) 43 #define PARTITION_BASIC_DATA_GUID \ 44 EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ 45 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) 46 #define PARTITION_LINUX_RAID_GUID \ 47 EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ 48 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e) 49 #define PARTITION_LINUX_SWAP_GUID \ 50 EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \ 51 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f) 52 #define PARTITION_LINUX_LVM_GUID \ 53 EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 54 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) 55 56 typedef struct _gpt_header { 57 __le64 signature; 58 __le32 revision; 59 __le32 header_size; 60 __le32 header_crc32; 61 __le32 reserved1; 62 __le64 my_lba; 63 __le64 alternate_lba; 64 __le64 first_usable_lba; 65 __le64 last_usable_lba; 66 efi_guid_t disk_guid; 67 __le64 partition_entry_lba; 68 __le32 num_partition_entries; 69 __le32 sizeof_partition_entry; 70 __le32 partition_entry_array_crc32; 71 72 /* The rest of the logical block is reserved by UEFI and must be zero. 73 * EFI standard handles this by: 74 * 75 * uint8_t reserved2[ BlockSize - 92 ]; 76 */ 77 } __packed gpt_header; 78 79 typedef struct _gpt_entry_attributes { 80 u64 required_to_function:1; 81 u64 reserved:47; 82 u64 type_guid_specific:16; 83 } __packed gpt_entry_attributes; 84 85 typedef struct _gpt_entry { 86 efi_guid_t partition_type_guid; 87 efi_guid_t unique_partition_guid; 88 __le64 starting_lba; 89 __le64 ending_lba; 90 gpt_entry_attributes attributes; 91 efi_char16_t partition_name[72 / sizeof (efi_char16_t)]; 92 } __packed gpt_entry; 93 94 typedef struct _gpt_mbr_record { 95 u8 boot_indicator; /* unused by EFI, set to 0x80 for bootable */ 96 u8 start_head; /* unused by EFI, pt start in CHS */ 97 u8 start_sector; /* unused by EFI, pt start in CHS */ 98 u8 start_track; 99 u8 os_type; /* EFI and legacy non-EFI OS types */ 100 u8 end_head; /* unused by EFI, pt end in CHS */ 101 u8 end_sector; /* unused by EFI, pt end in CHS */ 102 u8 end_track; /* unused by EFI, pt end in CHS */ 103 __le32 starting_lba; /* used by EFI - start addr of the on disk pt */ 104 __le32 size_in_lba; /* used by EFI - size of pt in LBA */ 105 } __packed gpt_mbr_record; 106 107 108 typedef struct _legacy_mbr { 109 u8 boot_code[440]; 110 __le32 unique_mbr_signature; 111 __le16 unknown; 112 gpt_mbr_record partition_record[4]; 113 __le16 signature; 114 } __packed legacy_mbr; 115 116 /* Functions */ 117 extern int efi_partition(struct parsed_partitions *state); 118 119 #endif 120