Gpt.c File Reference

#include <IndustryStandard/Mbr.h>
#include <Uefi/UefiGpt.h>
#include <Library/BaseLib.h>
#include "FatLitePeim.h"

Go to the source code of this file.

Data Structures
struct	EFI_PARTITION_ENTRY_STATUS

Macros
#define	EFI_SIZE_TO_BLOCKS(a, blocksize)   (((a) / (blocksize)) + (((a) % (blocksize)) ? 1 : 0))

Functions
BOOLEAN	PartitionCheckGptHeaderCRC (IN EFI_PARTITION_TABLE_HEADER *PartHeader)
BOOLEAN	PartitionCheckGptEntryArrayCRC (IN EFI_PARTITION_TABLE_HEADER *PartHeader, IN EFI_PARTITION_ENTRY *PartEntry)
BOOLEAN	PartitionCheckGptHeader (IN PEI_FAT_PRIVATE_DATA *PrivateData, IN UINTN ParentBlockDevNo, IN BOOLEAN IsPrimaryHeader, IN EFI_PARTITION_TABLE_HEADER *PartHdr)
BOOLEAN	PartitionCheckGptEntryArray (IN PEI_FAT_PRIVATE_DATA *PrivateData, IN UINTN ParentBlockDevNo, IN EFI_PARTITION_TABLE_HEADER *PartHdr)
BOOLEAN	PartitionCheckGptStructure (IN PEI_FAT_PRIVATE_DATA *PrivateData, IN UINTN ParentBlockDevNo, IN BOOLEAN IsPrimary)
BOOLEAN	PartitionCheckProtectiveMbr (IN PEI_FAT_PRIVATE_DATA *PrivateData, IN UINTN ParentBlockDevNo)
BOOLEAN	FatFindGptPartitions (IN PEI_FAT_PRIVATE_DATA *PrivateData, IN UINTN ParentBlockDevNo)

Detailed Description

Routines supporting partition discovery and logical device reading

Copyright (c) 2019 Intel Corporation. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file Gpt.c.

Macro Definition Documentation

EFI_SIZE_TO_BLOCKS

#define EFI_SIZE_TO_BLOCKS	(		a,
			blocksize
	)		(((a) / (blocksize)) + (((a) % (blocksize)) ? 1 : 0))

Definition at line 20 of file Gpt.c.

Function Documentation

FatFindGptPartitions()

BOOLEAN FatFindGptPartitions	(	IN PEI_FAT_PRIVATE_DATA *	PrivateData,
		IN UINTN	ParentBlockDevNo
	)

This function is used for finding GPT partition on block device. As follow UEFI spec we should check protective MBR first and then try to check both primary/backup GPT structures.

Parameters

[in]	PrivateData	The global memory map
[in]	ParentBlockDevNo	The parent block device

Return values

TRUE	New partitions are detected and logical block devices are added to block device array
FALSE	No new partitions are added

Definition at line 486 of file Gpt.c.

PartitionCheckGptEntryArray()

BOOLEAN PartitionCheckGptEntryArray	(	IN PEI_FAT_PRIVATE_DATA *	PrivateData,
		IN UINTN	ParentBlockDevNo,
		IN EFI_PARTITION_TABLE_HEADER *	PartHdr
	)

This function is used to verify each partition in block device.

Parameters

[in]	PrivateData	The global memory map
[in]	ParentBlockDevNo	The parent block device
[in]	PartHdr	Stores the partition table that is read

Return values

TRUE	The partition is valid
FALSE	The partition is not valid

Definition at line 185 of file Gpt.c.

PartitionCheckGptEntryArrayCRC()

BOOLEAN PartitionCheckGptEntryArrayCRC	(	IN EFI_PARTITION_TABLE_HEADER *	PartHeader,
		IN EFI_PARTITION_ENTRY *	PartEntry
	)

Check if the CRC field in the Partition table header is valid for Partition entry array.

Parameters

[in]	PartHeader	Partition table header structure
[in]	PartEntry	The partition entry array

Return values

TRUE	the CRC is valid
FALSE	the CRC is invalid

Definition at line 77 of file Gpt.c.

PartitionCheckGptHeader()

BOOLEAN PartitionCheckGptHeader	(	IN PEI_FAT_PRIVATE_DATA *	PrivateData,
		IN UINTN	ParentBlockDevNo,
		IN BOOLEAN	IsPrimaryHeader,
		IN EFI_PARTITION_TABLE_HEADER *	PartHdr
	)

The function is used for valid GPT table. Both for Primary and Backup GPT header.

Parameters

[in]	PrivateData	The global memory map
[in]	ParentBlockDevNo	The parent block device
[in]	IsPrimaryHeader	Indicate to which header will be checked.
[in]	PartHdr	Stores the partition table that is read

Return values

TRUE	The partition table is valid
FALSE	The partition table is not valid

Definition at line 104 of file Gpt.c.

PartitionCheckGptHeaderCRC()

BOOLEAN PartitionCheckGptHeaderCRC

(

IN EFI_PARTITION_TABLE_HEADER *

PartHeader

)

Check if the CRC field in the Partition table header is valid.

Parameters

[in]

PartHeader

Partition table header structure

Return values

TRUE	the CRC is valid
FALSE	the CRC is invalid

Definition at line 41 of file Gpt.c.

PartitionCheckGptStructure()

BOOLEAN PartitionCheckGptStructure	(	IN PEI_FAT_PRIVATE_DATA *	PrivateData,
		IN UINTN	ParentBlockDevNo,
		IN BOOLEAN	IsPrimary
	)

The function is used to check GPT structure, include GPT header and GPT entry array.

1. Check GPT header.
2. Check partition entry array.
3. Check each partitions.

Parameters

[in]	PrivateData	The global memory map
[in]	ParentBlockDevNo	The parent block device
[in]	IsPrimary	Indicate primary or backup to be check

Return values

TRUE	Primary or backup GPT structure is valid.
FALSE	Both primary and backup are invalid.

Definition at line 365 of file Gpt.c.

PartitionCheckProtectiveMbr()

BOOLEAN PartitionCheckProtectiveMbr	(	IN PEI_FAT_PRIVATE_DATA *	PrivateData,
		IN UINTN	ParentBlockDevNo
	)

This function is used to check protective MBR structure before checking GPT.

Parameters

[in]	PrivateData	The global memory map
[in]	ParentBlockDevNo	The parent block device

Return values

TRUE	Valid protective MBR
FALSE	Invalid MBR

Definition at line 417 of file Gpt.c.