180 lines
6.4 KiB
C
180 lines
6.4 KiB
C
/*
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* Copyright (C) 2023 Rockchip Electronics Co., Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _GPT_H
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#define _GPT_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_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 GPT_ENTRY_NUMBERS 128
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#define GPT_ENTRY_SIZE 128
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#define PART_PROPERTY_BOOTABLE (1 << 2)
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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_IDBLOCK_GUID \
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EFI_GUID(0xDA2BB095, 0x390E, 0x48ca, \
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0x90, 0x47, 0x05, 0xE8, 0x18, 0xB2, 0x97, 0xCE)
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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typedef unsigned long long u64;
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#define uswap_16(x) \
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((((x) & 0xff00) >> 8) | \
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(((x) & 0x00ff) << 8))
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#define uswap_32(x) \
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((((x) & 0xff000000) >> 24) | \
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(((x) & 0x00ff0000) >> 8) | \
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(((x) & 0x0000ff00) << 8) | \
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(((x) & 0x000000ff) << 24))
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#define _uswap_64(x, sfx) \
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((((x) & 0xff00000000000000##sfx) >> 56) | \
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(((x) & 0x00ff000000000000##sfx) >> 40) | \
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(((x) & 0x0000ff0000000000##sfx) >> 24) | \
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(((x) & 0x000000ff00000000##sfx) >> 8) | \
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(((x) & 0x00000000ff000000##sfx) << 8) | \
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(((x) & 0x0000000000ff0000##sfx) << 24) | \
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(((x) & 0x000000000000ff00##sfx) << 40) | \
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(((x) & 0x00000000000000ff##sfx) << 56))
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#if defined(__GNUC__)
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# define uswap_64(x) _uswap_64(x, ull)
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#else
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# define uswap_64(x) _uswap_64(x, )
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#endif
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#define __LITTLE_ENDIAN__ 1
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#ifdef __LITTLE_ENDIAN__
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# define cpu_to_le16(x) (x)
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# define cpu_to_le32(x) (x)
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# define cpu_to_le64(x) (x)
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# define le16_to_cpu(x) (x)
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# define le32_to_cpu(x) (x)
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# define le64_to_cpu(x) (x)
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# define cpu_to_be16(x) uswap_16(x)
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# define cpu_to_be32(x) uswap_32(x)
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# define cpu_to_be64(x) uswap_64(x)
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# define be16_to_cpu(x) uswap_16(x)
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# define be32_to_cpu(x) uswap_32(x)
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# define be64_to_cpu(x) uswap_64(x)
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#else
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# define cpu_to_le16(x) uswap_16(x)
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# define cpu_to_le32(x) uswap_32(x)
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# define cpu_to_le64(x) uswap_64(x)
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# define le16_to_cpu(x) uswap_16(x)
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# define le32_to_cpu(x) uswap_32(x)
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# define le64_to_cpu(x) uswap_64(x)
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# define cpu_to_be16(x) (x)
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# define cpu_to_be32(x) (x)
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# define cpu_to_be64(x) (x)
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# define be16_to_cpu(x) (x)
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# define be32_to_cpu(x) (x)
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# define be64_to_cpu(x) (x)
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#endif
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typedef union {
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struct {
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unsigned int time_low;
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unsigned short time_mid;
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unsigned short time_hi_and_version;
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unsigned char clock_seq_hi_and_reserved;
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unsigned char clock_seq_low;
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unsigned char node[6];
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} uuid;
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u8 raw[16];
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} efi_guid_t;
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#pragma pack(1)
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typedef struct {
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u16 usTag;/*0xEEEE*/
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u16 usBackupGpt;/*0:no backup,1:has backup*/
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u16 usEntryCount;
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u64 entryDataSize[32];
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} gpt_compact_info;
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/* based on linux/include/genhd.h */
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typedef struct {
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u8 boot_ind; /* 0x80 - active */
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u8 head; /* starting head */
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u8 sector; /* starting sector */
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u8 cyl; /* starting cylinder */
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u8 sys_ind; /* What partition type */
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u8 end_head; /* end head */
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u8 end_sector; /* end sector */
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u8 end_cyl; /* end cylinder */
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u32 start_sect; /* starting sector counting from 0 */
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u32 nr_sects; /* nr of sectors in partition */
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} mbr_partition ;
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/* based on linux/fs/partitions/efi.h */
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typedef struct _gpt_header {
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u64 signature; //固定字符串“EFI PART”
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u32 revision; //GPT版本号
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u32 header_size; //主GPT头大小
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u32 header_crc32; //主GPT头的CRC32校验数据，注意不是累加和校验
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u32 reserved1; //保留位
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u64 my_lba; //主GPT头起始扇区号，LBA1
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u64 alternate_lba; //主GPT头备份位置扇区号 LBA-1
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u64 first_usable_lba; //GPT分区起始扇区号，LBA34
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u64 last_usable_lba; //GPT分区结束扇区号，LBA-34
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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.
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u64 partition_entry_lba; //分区表起始扇区号，LBA2
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u32 num_partition_entries; //分区表项数目，MS强行给128
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u32 sizeof_partition_entry; //每个分区表占用字节数，128
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u32 partition_entry_array_crc32; //分区表CRC校验数据
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} gpt_header;
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typedef union _gpt_entry_attributes {
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struct {
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u64 required_to_function: 1;
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u64 no_block_io_protocol: 1;
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u64 legacy_bios_bootable: 1;
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u64 reserved: 45;
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u64 type_guid_specific: 16;
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} fields;
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unsigned long long raw;
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} gpt_entry_attributes;
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#define PARTNAME_SZ 72
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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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u64 starting_lba;
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u64 ending_lba;
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gpt_entry_attributes attributes;
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u16 partition_name[PARTNAME_SZ / sizeof(u16)];
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} gpt_entry;
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typedef struct _legacy_mbr {
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u8 boot_code[440];
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u32 unique_mbr_signature;
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u16 unknown;
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mbr_partition partition_record[4];
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u16 signature;
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} legacy_mbr;
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#pragma pack()
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#endif /* _GPT_H */
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