1 /* 2 * Copyright (C) 2023 Rockchip Electronics Co., Ltd. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _GPT_H 18 #define _GPT_H 19 20 #define MSDOS_MBR_SIGNATURE 0xAA55 21 #define EFI_PMBR_OSTYPE_EFI 0xEF 22 #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE 23 24 #define GPT_HEADER_SIGNATURE 0x5452415020494645ULL 25 #define GPT_HEADER_REVISION_V1 0x00010000 26 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL 27 #define GPT_ENTRY_NAME "gpt" 28 #define GPT_ENTRY_NUMBERS 128 29 #define GPT_ENTRY_SIZE 128 30 #define PART_PROPERTY_BOOTABLE (1 << 2) 31 32 #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ 33 ((efi_guid_t) \ 34 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \ 35 (b) & 0xff, ((b) >> 8) & 0xff, \ 36 (c) & 0xff, ((c) >> 8) & 0xff, \ 37 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}) 38 39 #define PARTITION_IDBLOCK_GUID \ 40 EFI_GUID(0xDA2BB095, 0x390E, 0x48ca, \ 41 0x90, 0x47, 0x05, 0xE8, 0x18, 0xB2, 0x97, 0xCE) 42 43 typedef unsigned char u8; 44 typedef unsigned short u16; 45 typedef unsigned int u32; 46 typedef unsigned long long u64; 47 48 #define uswap_16(x) \ 49 ((((x) & 0xff00) >> 8) | \ 50 (((x) & 0x00ff) << 8)) 51 #define uswap_32(x) \ 52 ((((x) & 0xff000000) >> 24) | \ 53 (((x) & 0x00ff0000) >> 8) | \ 54 (((x) & 0x0000ff00) << 8) | \ 55 (((x) & 0x000000ff) << 24)) 56 #define _uswap_64(x, sfx) \ 57 ((((x) & 0xff00000000000000##sfx) >> 56) | \ 58 (((x) & 0x00ff000000000000##sfx) >> 40) | \ 59 (((x) & 0x0000ff0000000000##sfx) >> 24) | \ 60 (((x) & 0x000000ff00000000##sfx) >> 8) | \ 61 (((x) & 0x00000000ff000000##sfx) << 8) | \ 62 (((x) & 0x0000000000ff0000##sfx) << 24) | \ 63 (((x) & 0x000000000000ff00##sfx) << 40) | \ 64 (((x) & 0x00000000000000ff##sfx) << 56)) 65 #if defined(__GNUC__) 66 # define uswap_64(x) _uswap_64(x, ull) 67 #else 68 # define uswap_64(x) _uswap_64(x, ) 69 #endif 70 #define __LITTLE_ENDIAN__ 1 71 #ifdef __LITTLE_ENDIAN__ 72 # define cpu_to_le16(x) (x) 73 # define cpu_to_le32(x) (x) 74 # define cpu_to_le64(x) (x) 75 # define le16_to_cpu(x) (x) 76 # define le32_to_cpu(x) (x) 77 # define le64_to_cpu(x) (x) 78 # define cpu_to_be16(x) uswap_16(x) 79 # define cpu_to_be32(x) uswap_32(x) 80 # define cpu_to_be64(x) uswap_64(x) 81 # define be16_to_cpu(x) uswap_16(x) 82 # define be32_to_cpu(x) uswap_32(x) 83 # define be64_to_cpu(x) uswap_64(x) 84 #else 85 # define cpu_to_le16(x) uswap_16(x) 86 # define cpu_to_le32(x) uswap_32(x) 87 # define cpu_to_le64(x) uswap_64(x) 88 # define le16_to_cpu(x) uswap_16(x) 89 # define le32_to_cpu(x) uswap_32(x) 90 # define le64_to_cpu(x) uswap_64(x) 91 # define cpu_to_be16(x) (x) 92 # define cpu_to_be32(x) (x) 93 # define cpu_to_be64(x) (x) 94 # define be16_to_cpu(x) (x) 95 # define be32_to_cpu(x) (x) 96 # define be64_to_cpu(x) (x) 97 #endif 98 99 100 typedef union { 101 struct { 102 unsigned int time_low; 103 unsigned short time_mid; 104 unsigned short time_hi_and_version; 105 unsigned char clock_seq_hi_and_reserved; 106 unsigned char clock_seq_low; 107 unsigned char node[6]; 108 } uuid; 109 u8 raw[16]; 110 } efi_guid_t; 111 #pragma pack(1) 112 typedef struct { 113 u16 usTag;/*0xEEEE*/ 114 u16 usBackupGpt;/*0:no backup,1:has backup*/ 115 u16 usEntryCount; 116 u64 entryDataSize[32]; 117 } gpt_compact_info; 118 /* based on linux/include/genhd.h */ 119 typedef struct { 120 u8 boot_ind; /* 0x80 - active */ 121 u8 head; /* starting head */ 122 u8 sector; /* starting sector */ 123 u8 cyl; /* starting cylinder */ 124 u8 sys_ind; /* What partition type */ 125 u8 end_head; /* end head */ 126 u8 end_sector; /* end sector */ 127 u8 end_cyl; /* end cylinder */ 128 u32 start_sect; /* starting sector counting from 0 */ 129 u32 nr_sects; /* nr of sectors in partition */ 130 } mbr_partition ; 131 132 /* based on linux/fs/partitions/efi.h */ 133 typedef struct _gpt_header { 134 u64 signature; //固定字符串“EFI PART” 135 u32 revision; //GPT版本号 136 u32 header_size; //主GPT头大小 137 u32 header_crc32; //主GPT头的CRC32校验数据，注意不是累加和校验 138 u32 reserved1; //保留位 139 u64 my_lba; //主GPT头起始扇区号，LBA1 140 u64 alternate_lba; //主GPT头备份位置扇区号 LBA-1 141 u64 first_usable_lba; //GPT分区起始扇区号，LBA34 142 u64 last_usable_lba; //GPT分区结束扇区号，LBA-34 143 efi_guid_t disk_guid; //磁盘的GUID，唯一标识，这也意味着全硬盘复制是行不通的. 144 u64 partition_entry_lba; //分区表起始扇区号，LBA2 145 u32 num_partition_entries; //分区表项数目，MS强行给128 146 u32 sizeof_partition_entry; //每个分区表占用字节数，128 147 u32 partition_entry_array_crc32; //分区表CRC校验数据 148 } gpt_header; 149 150 typedef union _gpt_entry_attributes { 151 struct { 152 u64 required_to_function: 1; 153 u64 no_block_io_protocol: 1; 154 u64 legacy_bios_bootable: 1; 155 u64 reserved: 45; 156 u64 type_guid_specific: 16; 157 } fields; 158 unsigned long long raw; 159 } gpt_entry_attributes; 160 161 #define PARTNAME_SZ 72 162 typedef struct _gpt_entry { 163 efi_guid_t partition_type_guid; 164 efi_guid_t unique_partition_guid; 165 u64 starting_lba; 166 u64 ending_lba; 167 gpt_entry_attributes attributes; 168 u16 partition_name[PARTNAME_SZ / sizeof(u16)]; 169 } gpt_entry; 170 171 typedef struct _legacy_mbr { 172 u8 boot_code[440]; 173 u32 unique_mbr_signature; 174 u16 unknown; 175 mbr_partition partition_record[4]; 176 u16 signature; 177 } legacy_mbr; 178 #pragma pack() 179 #endif /* _GPT_H */ 180