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/*
* Copyright (C) 2023 Rockchip Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _GPT_H
#define _GPT_H
#define MSDOS_MBR_SIGNATURE 0xAA55
#define EFI_PMBR_OSTYPE_EFI 0xEF
#define EFI_PMBR_OSTYPE_EFI_GPT 0xEE
#define GPT_HEADER_SIGNATURE 0x5452415020494645ULL
#define GPT_HEADER_REVISION_V1 0x00010000
#define GPT_PRIMARY_PARTITION_TABLE_LBA 1ULL
#define GPT_ENTRY_NAME "gpt"
#define GPT_ENTRY_NUMBERS 128
#define GPT_ENTRY_SIZE 128
#define PART_PROPERTY_BOOTABLE (1 << 2)
#define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
((efi_guid_t) \
{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
(b) & 0xff, ((b) >> 8) & 0xff, \
(c) & 0xff, ((c) >> 8) & 0xff, \
(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }})
#define PARTITION_IDBLOCK_GUID \
EFI_GUID(0xDA2BB095, 0x390E, 0x48ca, \
0x90, 0x47, 0x05, 0xE8, 0x18, 0xB2, 0x97, 0xCE)
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
typedef unsigned long long u64;
#define uswap_16(x) \
((((x) & 0xff00) >> 8) | \
(((x) & 0x00ff) << 8))
#define uswap_32(x) \
((((x) & 0xff000000) >> 24) | \
(((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | \
(((x) & 0x000000ff) << 24))
#define _uswap_64(x, sfx) \
((((x) & 0xff00000000000000##sfx) >> 56) | \
(((x) & 0x00ff000000000000##sfx) >> 40) | \
(((x) & 0x0000ff0000000000##sfx) >> 24) | \
(((x) & 0x000000ff00000000##sfx) >> 8) | \
(((x) & 0x00000000ff000000##sfx) << 8) | \
(((x) & 0x0000000000ff0000##sfx) << 24) | \
(((x) & 0x000000000000ff00##sfx) << 40) | \
(((x) & 0x00000000000000ff##sfx) << 56))
#if defined(__GNUC__)
# define uswap_64(x) _uswap_64(x, ull)
#else
# define uswap_64(x) _uswap_64(x, )
#endif
#define __LITTLE_ENDIAN__ 1
#ifdef __LITTLE_ENDIAN__
# define cpu_to_le16(x) (x)
# define cpu_to_le32(x) (x)
# define cpu_to_le64(x) (x)
# define le16_to_cpu(x) (x)
# define le32_to_cpu(x) (x)
# define le64_to_cpu(x) (x)
# define cpu_to_be16(x) uswap_16(x)
# define cpu_to_be32(x) uswap_32(x)
# define cpu_to_be64(x) uswap_64(x)
# define be16_to_cpu(x) uswap_16(x)
# define be32_to_cpu(x) uswap_32(x)
# define be64_to_cpu(x) uswap_64(x)
#else
# define cpu_to_le16(x) uswap_16(x)
# define cpu_to_le32(x) uswap_32(x)
# define cpu_to_le64(x) uswap_64(x)
# define le16_to_cpu(x) uswap_16(x)
# define le32_to_cpu(x) uswap_32(x)
# define le64_to_cpu(x) uswap_64(x)
# define cpu_to_be16(x) (x)
# define cpu_to_be32(x) (x)
# define cpu_to_be64(x) (x)
# define be16_to_cpu(x) (x)
# define be32_to_cpu(x) (x)
# define be64_to_cpu(x) (x)
#endif
typedef union {
struct {
unsigned int time_low;
unsigned short time_mid;
unsigned short time_hi_and_version;
unsigned char clock_seq_hi_and_reserved;
unsigned char clock_seq_low;
unsigned char node[6];
} uuid;
u8 raw[16];
} efi_guid_t;
#pragma pack(1)
typedef struct {
u16 usTag;/*0xEEEE*/
u16 usBackupGpt;/*0:no backup,1:has backup*/
u16 usEntryCount;
u64 entryDataSize[32];
} gpt_compact_info;
/* based on linux/include/genhd.h */
typedef struct {
u8 boot_ind; /* 0x80 - active */
u8 head; /* starting head */
u8 sector; /* starting sector */
u8 cyl; /* starting cylinder */
u8 sys_ind; /* What partition type */
u8 end_head; /* end head */
u8 end_sector; /* end sector */
u8 end_cyl; /* end cylinder */
u32 start_sect; /* starting sector counting from 0 */
u32 nr_sects; /* nr of sectors in partition */
} mbr_partition ;
/* based on linux/fs/partitions/efi.h */
typedef struct _gpt_header {
u64 signature; //固定字符串“EFI PART”
u32 revision; //GPT版本号
u32 header_size; //主GPT头大小
u32 header_crc32; //主GPT头的CRC32校验数据注意不是累加和校验
u32 reserved1; //保留位
u64 my_lba; //主GPT头起始扇区号LBA1
u64 alternate_lba; //主GPT头备份位置扇区号 LBA-1
u64 first_usable_lba; //GPT分区起始扇区号LBA34
u64 last_usable_lba; //GPT分区结束扇区号LBA-34
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.
u64 partition_entry_lba; //分区表起始扇区号LBA2
u32 num_partition_entries; //分区表项数目MS强行给128
u32 sizeof_partition_entry; //每个分区表占用字节数128
u32 partition_entry_array_crc32; //分区表CRC校验数据
} gpt_header;
typedef union _gpt_entry_attributes {
struct {
u64 required_to_function: 1;
u64 no_block_io_protocol: 1;
u64 legacy_bios_bootable: 1;
u64 reserved: 45;
u64 type_guid_specific: 16;
} fields;
unsigned long long raw;
} gpt_entry_attributes;
#define PARTNAME_SZ 72
typedef struct _gpt_entry {
efi_guid_t partition_type_guid;
efi_guid_t unique_partition_guid;
u64 starting_lba;
u64 ending_lba;
gpt_entry_attributes attributes;
u16 partition_name[PARTNAME_SZ / sizeof(u16)];
} gpt_entry;
typedef struct _legacy_mbr {
u8 boot_code[440];
u32 unique_mbr_signature;
u16 unknown;
mbr_partition partition_record[4];
u16 signature;
} legacy_mbr;
#pragma pack()
#endif /* _GPT_H */