Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/common/sys/efi_partition.h
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1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #ifndef _SYS_EFI_PARTITION_H 26 #define _SYS_EFI_PARTITION_H 27 28 #include <sys/uuid.h> 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 /* 35 * GUID Partition Table Header 36 */ 37 38 #define EFI_LABEL_SIZE 512 39 #define LEN_EFI_PAD (EFI_LABEL_SIZE - \ 40 ((5 * sizeof (diskaddr_t)) + \ 41 (7 * sizeof (uint_t)) + \ 42 (8 * sizeof (char)) + \ 43 (1 * (sizeof (struct uuid))))) 44 45 #define EFI_SIGNATURE 0x5452415020494645ULL 46 47 /* EFI Guid Partition Table Header -- little endian on-disk format */ 48 typedef struct efi_gpt { 49 uint64_t efi_gpt_Signature; 50 uint_t efi_gpt_Revision; 51 uint_t efi_gpt_HeaderSize; 52 uint_t efi_gpt_HeaderCRC32; 53 uint_t efi_gpt_Reserved1; 54 diskaddr_t efi_gpt_MyLBA; 55 diskaddr_t efi_gpt_AlternateLBA; 56 diskaddr_t efi_gpt_FirstUsableLBA; 57 diskaddr_t efi_gpt_LastUsableLBA; 58 struct uuid efi_gpt_DiskGUID; 59 diskaddr_t efi_gpt_PartitionEntryLBA; 60 uint_t efi_gpt_NumberOfPartitionEntries; 61 uint_t efi_gpt_SizeOfPartitionEntry; 62 uint_t efi_gpt_PartitionEntryArrayCRC32; 63 char efi_gpt_Reserved2[LEN_EFI_PAD]; 64 } efi_gpt_t; 65 66 /* EFI Guid Partition Entry Attributes -- little endian format */ 67 typedef struct efi_gpe_Attrs { 68 uint32_t PartitionAttrs :16, 69 Reserved2 :16; 70 uint32_t Reserved1 :31, 71 RequiredPartition :1; 72 } efi_gpe_Attrs_t; 73 74 /* 75 * 6a96237f-1dd2-11b2-99a6-080020736631 V_UNASSIGNED (not used as such) 76 * 6a82cb45-1dd2-11b2-99a6-080020736631 V_BOOT 77 * 6a85cf4d-1dd2-11b2-99a6-080020736631 V_ROOT 78 * 6a87c46f-1dd2-11b2-99a6-080020736631 V_SWAP 79 * 6a898cc3-1dd2-11b2-99a6-080020736631 V_USR 80 * 6a8b642b-1dd2-11b2-99a6-080020736631 V_BACKUP 81 * 6a8d2ac7-1dd2-11b2-99a6-080020736631 V_STAND (not used) 82 * 6a8ef2e9-1dd2-11b2-99a6-080020736631 V_VAR 83 * 6a90ba39-1dd2-11b2-99a6-080020736631 V_HOME 84 * 6a9283a5-1dd2-11b2-99a6-080020736631 V_ALTSCTR 85 * 6a945a3b-1dd2-11b2-99a6-080020736631 V_CACHE 86 */ 87 88 #define EFI_UNUSED { 0x00000000, 0x0000, 0x0000, 0x00, 0x00, \ 89 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } 90 #define EFI_RESV1 { 0x6a96237f, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 91 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 92 #define EFI_BOOT { 0x6a82cb45, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 93 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 94 #define EFI_ROOT { 0x6a85cf4d, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 95 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 96 #define EFI_SWAP { 0x6a87c46f, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 97 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 98 #define EFI_USR { 0x6a898cc3, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 99 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 100 #define EFI_BACKUP { 0x6a8b642b, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 101 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 102 #define EFI_RESV2 { 0x6a8d2ac7, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 103 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 104 #define EFI_VAR { 0x6a8ef2e9, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 105 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 106 #define EFI_HOME { 0x6a90ba39, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 107 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 108 #define EFI_ALTSCTR { 0x6a9283a5, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 109 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 110 #define EFI_RESERVED { 0x6a945a3b, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 111 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 112 #define EFI_SYSTEM { 0xC12A7328, 0xF81F, 0x11d2, 0xBA, 0x4B, \ 113 { 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B } } 114 #define EFI_LEGACY_MBR { 0x024DEE41, 0x33E7, 0x11d3, 0x9D, 0x69, \ 115 { 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F } } 116 #define EFI_SYMC_PUB { 0x6a9630d1, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 117 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 118 #define EFI_SYMC_CDS { 0x6a980767, 0x1dd2, 0x11b2, 0x99, 0xa6, \ 119 { 0x08, 0x00, 0x20, 0x73, 0x66, 0x31 } } 120 #define EFI_MSFT_RESV { 0xE3C9E316, 0x0B5C, 0x4DB8, 0x81, 0x7D, \ 121 { 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE } } 122 #define EFI_DELL_BASIC { 0xebd0a0a2, 0xb9e5, 0x4433, 0x87, 0xc0, \ 123 { 0x68, 0xb6, 0xb7, 0x26, 0x99, 0xc7 } } 124 #define EFI_DELL_RAID { 0xa19d880f, 0x05fc, 0x4d3b, 0xa0, 0x06, \ 125 { 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e } } 126 #define EFI_DELL_SWAP { 0x0657fd6d, 0xa4ab, 0x43c4, 0x84, 0xe5, \ 127 { 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f } } 128 #define EFI_DELL_LVM { 0xe6d6d379, 0xf507, 0x44c2, 0xa2, 0x3c, \ 129 { 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28 } } 130 #define EFI_DELL_RESV { 0x8da63339, 0x0007, 0x60c0, 0xc4, 0x36, \ 131 { 0x08, 0x3a, 0xc8, 0x23, 0x09, 0x08 } } 132 #define EFI_AAPL_HFS { 0x48465300, 0x0000, 0x11aa, 0xaa, 0x11, \ 133 { 0x00, 0x30, 0x65, 0x43, 0xec, 0xac } } 134 #define EFI_AAPL_UFS { 0x55465300, 0x0000, 0x11aa, 0xaa, 0x11, \ 135 { 0x00, 0x30, 0x65, 0x43, 0xec, 0xac } } 136 137 /* minimum # of bytes for partition table entires, per EFI spec */ 138 #define EFI_MIN_ARRAY_SIZE (16 * 1024) 139 140 #define EFI_PART_NAME_LEN 36 141 142 /* size of the "reserved" partition, in blocks */ 143 #define EFI_MIN_RESV_SIZE (16 * 1024) 144 145 /* EFI Guid Partition Entry */ 146 typedef struct efi_gpe { 147 struct uuid efi_gpe_PartitionTypeGUID; 148 struct uuid efi_gpe_UniquePartitionGUID; 149 diskaddr_t efi_gpe_StartingLBA; 150 diskaddr_t efi_gpe_EndingLBA; 151 efi_gpe_Attrs_t efi_gpe_Attributes; 152 ushort_t efi_gpe_PartitionName[EFI_PART_NAME_LEN]; 153 } efi_gpe_t; 154 155 /* 156 * passed to the useful (we hope) routines (efi_alloc_and_read and 157 * efi_write) that take this VTOC-like struct. These routines handle 158 * converting this struct into the EFI struct, generate UUIDs and 159 * checksums, and perform any necessary byte-swapping to the on-disk 160 * format. 161 */ 162 /* Solaris library abstraction for EFI partitons */ 163 typedef struct dk_part { 164 diskaddr_t p_start; /* starting LBA */ 165 diskaddr_t p_size; /* size in blocks */ 166 struct uuid p_guid; /* partion type GUID */ 167 ushort_t p_tag; /* converted to part'n type GUID */ 168 ushort_t p_flag; /* attributes */ 169 char p_name[EFI_PART_NAME_LEN]; /* partition name */ 170 struct uuid p_uguid; /* unique partition GUID */ 171 uint_t p_resv[8]; /* future use - set to zero */ 172 } dk_part_t; 173 174 /* Solaris library abstraction for an EFI GPT */ 175 #define EFI_VERSION102 0x00010002 176 #define EFI_VERSION100 0x00010000 177 #define EFI_VERSION_CURRENT EFI_VERSION100 178 typedef struct dk_gpt { 179 uint_t efi_version; /* set to EFI_VERSION_CURRENT */ 180 uint_t efi_nparts; /* number of partitions below */ 181 uint_t efi_part_size; /* size of each partition entry */ 182 /* efi_part_size is unused */ 183 uint_t efi_lbasize; /* size of block in bytes */ 184 diskaddr_t efi_last_lba; /* last block on the disk */ 185 diskaddr_t efi_first_u_lba; /* first block after labels */ 186 diskaddr_t efi_last_u_lba; /* last block before backup labels */ 187 struct uuid efi_disk_uguid; /* unique disk GUID */ 188 uint_t efi_flags; 189 uint_t efi_reserved1; /* future use - set to zero */ 190 diskaddr_t efi_altern_lba; /* lba of alternate GPT header */ 191 uint_t efi_reserved[12]; /* future use - set to zero */ 192 struct dk_part efi_parts[1]; /* array of partitions */ 193 } dk_gpt_t; 194 195 /* possible values for "efi_flags" */ 196 #define EFI_GPT_PRIMARY_CORRUPT 0x1 /* primary label corrupt */ 197 198 /* the private ioctl between libefi and the driver */ 199 typedef struct dk_efi { 200 diskaddr_t dki_lba; /* starting block */ 201 len_t dki_length; /* length in bytes */ 202 union { 203 efi_gpt_t *_dki_data; 204 uint64_t _dki_data_64; 205 } dki_un; 206 #define dki_data dki_un._dki_data 207 #define dki_data_64 dki_un._dki_data_64 208 } dk_efi_t; 209 210 struct partition64 { 211 struct uuid p_type; 212 uint_t p_partno; 213 uint_t p_resv1; 214 diskaddr_t p_start; 215 diskaddr_t p_size; 216 }; 217 218 /* 219 * Number of EFI partitions 220 */ 221 #define EFI_NUMPAR 9 222 223 #ifndef _KERNEL 224 extern int efi_alloc_and_init(int, uint32_t, struct dk_gpt **); 225 extern int efi_alloc_and_read(int, struct dk_gpt **); 226 extern int efi_write(int, struct dk_gpt *); 227 extern void efi_free(struct dk_gpt *); 228 extern int efi_type(int); 229 extern void efi_err_check(struct dk_gpt *); 230 extern int efi_auto_sense(int fd, struct dk_gpt **); 231 extern int efi_use_whole_disk(int fd); 232 #endif 233 234 #ifdef __cplusplus 235 } 236 #endif 237 238 #endif /* _SYS_EFI_PARTITION_H */
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