code.delx.au - refind/blob - refind/gpt.h

   1 /*
   2  * refind/gpt.h
   3  * Functions related to GPT data structures
   4  *
   5  * Copyright (c) 2014-2015 Roderick W. Smith
   6  * All rights reserved.
   7  *
   8  * This program is distributed under the terms of the GNU General Public
   9  * License (GPL) version 3 (GPLv3), a copy of which must be distributed
  10  * with this source code or binaries made from it.
  11  *
  12  */
  13
  14 #include "global.h"
  15
  16 #ifndef __GPT_H_
  17 #define __GPT_H_
  18
  19 #ifdef __MAKEWITH_GNUEFI
  20 #include "efi.h"
  21 #include "efilib.h"
  22 #else
  23 #include "../include/tiano_includes.h"
  24 #endif
  25
  26 #pragma pack(1)
  27 typedef struct {
  28    UINT8   flags;
  29    UINT8   start_chs[3];
  30    UINT8   type;
  31    UINT8   end_chs[3];
  32    UINT32  start_lba;
  33    UINT32  size;
  34 } MBR_PART_INFO;
  35
  36 // A 512-byte data structure into which the MBR can be loaded in one
  37 // go. Also used when loading logical partitions.
  38
  39 typedef struct {
  40    UINT8            code[440];
  41    UINT32           diskSignature;
  42    UINT16           nulls;
  43    MBR_PART_INFO    partitions[4];
  44    UINT16           MBRSignature;
  45 } MBR_RECORD;
  46
  47 typedef struct {
  48    UINT64  signature;
  49    UINT32  spec_revision;
  50    UINT32  header_size;
  51    UINT32  header_crc32;
  52    UINT32  reserved;
  53    UINT64  header_lba;
  54    UINT64  alternate_header_lba;
  55    UINT64  first_usable_lba;
  56    UINT64  last_usable_lba;
  57    UINT8   disk_guid[16];
  58    UINT64  entry_lba;
  59    UINT32  entry_count;
  60    UINT32  entry_size;
  61    UINT32  entry_crc32;
  62    UINT8   reserved2[420];
  63 } GPT_HEADER;
  64
  65 typedef struct {
  66    UINT8   type_guid[16];
  67    UINT8   partition_guid[16];
  68    UINT64  start_lba;
  69    UINT64  end_lba;
  70    UINT64  attributes;
  71    CHAR16  name[36];
  72 } GPT_ENTRY;
  73
  74 typedef struct _gpt_data {
  75    MBR_RECORD         *ProtectiveMBR;
  76    GPT_HEADER         *Header;
  77    GPT_ENTRY          *Entries;
  78    struct _gpt_data   *NextEntry;
  79 } GPT_DATA;
  80
  81 #pragma pack(0)
  82
  83 VOID ClearGptData(GPT_DATA *Data);
  84 EFI_STATUS ReadGptData(REFIT_VOLUME *Volume, GPT_DATA **Data);
  85 // CHAR16 * PartNameFromGuid(EFI_GUID *Guid);
  86 GPT_ENTRY * FindPartWithGuid(EFI_GUID *Guid);
  87 VOID ForgetPartitionTables(VOID);
  88 VOID AddPartitionTable(REFIT_VOLUME *Volume);
  89
  90 #endif