/* gpt.[ch] Copyright (C) 2000-2001 Dell Computer Corporation EFI GUID Partition Table handling Per Intel EFI Specification v1.02 http://developer.intel.com/technology/efi/efi.htm This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ // For TWRP purposes, we'll be opting for version 3 of the GPL #ifndef _GPT_H #define _GPT_H #include //#include "efi.h" typedef struct { uint8_t b[16]; } efi_guid_t; typedef uint16_t efi_char16_t; /* UNICODE character */ #define EFI_PMBR_OSTYPE_EFI 0xEF #define EFI_PMBR_OSTYPE_EFI_GPT 0xEE #define MSDOS_MBR_SIGNATURE 0xaa55 #define GPT_BLOCK_SIZE 512 static const char* TWGptAndroidExpand = "193d1ea4b3ca11e4b07510604b889dcf"; #define GPT_HEADER_SIGNATURE ((uint64_t)(0x5452415020494645LL)) #define GPT_HEADER_REVISION_V1_02 0x00010200 #define GPT_HEADER_REVISION_V1_00 0x00010000 #define GPT_HEADER_REVISION_V0_99 0x00009900 #define GPT_PRIMARY_PARTITION_TABLE_LBA 1 #define PARTITION_SYSTEM_GUID \ EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \ 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B) #define LEGACY_MBR_PARTITION_GUID \ EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \ 0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F) #define PARTITION_MSFT_RESERVED_GUID \ EFI_GUID( 0xE3C9E316, 0x0B5C, 0x4DB8, \ 0x81, 0x7D, 0xF9, 0x2D, 0xF0, 0x02, 0x15, 0xAE) #define PARTITION_BASIC_DATA_GUID \ EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) #define PARTITION_LINUX_RAID_GUID \ EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e) #define PARTITION_LINUX_SWAP_GUID \ EFI_GUID( 0x0657fd6d, 0xa4ab, 0x43c4, \ 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f, 0x4f) #define PARTITION_LINUX_LVM_GUID \ EFI_GUID( 0xe6d6d379, 0xf507, 0x44c2, \ 0xa2, 0x3c, 0x23, 0x8f, 0x2a, 0x3d, 0xf9, 0x28) typedef struct _gpt_header { uint64_t signature; uint32_t revision; uint32_t header_size; uint32_t header_crc32; uint32_t reserved1; uint64_t my_lba; uint64_t alternate_lba; uint64_t first_usable_lba; uint64_t last_usable_lba; efi_guid_t disk_guid; uint64_t partition_entry_lba; uint32_t num_partition_entries; uint32_t sizeof_partition_entry; uint32_t partition_entry_array_crc32; uint8_t reserved2[GPT_BLOCK_SIZE - 92]; } __attribute__ ((packed)) gpt_header; typedef struct _gpt_entry_attributes { uint64_t required_to_function:1; uint64_t reserved:47; uint64_t type_guid_specific:16; } __attribute__ ((packed)) gpt_entry_attributes; typedef struct _gpt_entry { efi_guid_t partition_type_guid; efi_guid_t unique_partition_guid; uint64_t starting_lba; uint64_t ending_lba; gpt_entry_attributes attributes; efi_char16_t partition_name[72 / sizeof(efi_char16_t)]; } __attribute__ ((packed)) gpt_entry; /* These values are only defaults. The actual on-disk structures may define different sizes, so use those unless creating a new GPT disk! */ #define GPT_DEFAULT_RESERVED_PARTITION_ENTRY_ARRAY_SIZE 16384 /* Number of actual partition entries should be calculated as: */ #define GPT_DEFAULT_RESERVED_PARTITION_ENTRIES \ (GPT_DEFAULT_RESERVED_PARTITION_ENTRY_ARRAY_SIZE / \ sizeof(gpt_entry)) typedef struct _partition_record { uint8_t boot_indicator; /* Not used by EFI firmware. Set to 0x80 to indicate that this is the bootable legacy partition. */ uint8_t start_head; /* Start of partition in CHS address, not used by EFI firmware. */ uint8_t start_sector; /* Start of partition in CHS address, not used by EFI firmware. */ uint8_t start_track; /* Start of partition in CHS address, not used by EFI firmware. */ uint8_t os_type; /* OS type. A value of 0xEF defines an EFI system partition. Other values are reserved for legacy operating systems, and allocated independently of the EFI specification. */ uint8_t end_head; /* End of partition in CHS address, not used by EFI firmware. */ uint8_t end_sector; /* End of partition in CHS address, not used by EFI firmware. */ uint8_t end_track; /* End of partition in CHS address, not used by EFI firmware. */ uint32_t starting_lba; /* Starting LBA address of the partition on the disk. Used by EFI firmware to define the start of the partition. */ uint32_t size_in_lba; /* Size of partition in LBA. Used by EFI firmware to determine the size of the partition. */ } __attribute__ ((packed)) partition_record; /* Protected Master Boot Record & Legacy MBR share same structure */ /* Needs to be packed because the u16s force misalignment. */ typedef struct _legacy_mbr { uint8_t bootcode[440]; uint32_t unique_mbr_signature; uint16_t unknown; partition_record partition[4]; uint16_t signature; } __attribute__ ((packed)) legacy_mbr; #define EFI_GPT_PRIMARY_PARTITION_TABLE_LBA 1 /* Functions */ int gpt_disk_get_partition_info (int fd, uint32_t num, char *type, char *part); #endif /* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only. This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-indent-level: 4 * c-brace-imaginary-offset: 0 * c-brace-offset: -4 * c-argdecl-indent: 4 * c-label-offset: -4 * c-continued-statement-offset: 4 * c-continued-brace-offset: 0 * indent-tabs-mode: nil * tab-width: 8 * End: */