Mbr.c File Reference

#include "Partition.h"

Go to the source code of this file.

Functions
BOOLEAN	PartitionValidMbr (IN MASTER_BOOT_RECORD *Mbr, IN EFI_LBA LastLba)
EFI_STATUS	PartitionInstallMbrChildHandles (IN EFI_DRIVER_BINDING_PROTOCOL *This, IN EFI_HANDLE Handle, IN EFI_DISK_IO_PROTOCOL *DiskIo, IN EFI_DISK_IO2_PROTOCOL *DiskIo2, IN EFI_BLOCK_IO_PROTOCOL *BlockIo, IN EFI_BLOCK_IO2_PROTOCOL *BlockIo2, IN EFI_DEVICE_PATH_PROTOCOL *DevicePath)

Detailed Description

Decode a hard disk partitioned with the legacy MBR found on most PC's

MBR - Master Boot Record is in the first sector of a partitioned hard disk. The MBR supports four partitions per disk. The MBR also contains legacy code that is not run on an EFI system. The legacy code reads the first sector of the active partition into memory and

BPB - BIOS Parameter Block is in the first sector of a FAT file system. The BPB contains information about the FAT file system. The BPB is always on the first sector of a media. The first sector also contains the legacy boot strap code.

Copyright (c) 2018 Qualcomm Datacenter Technologies, Inc. Copyright (c) 2014, Hewlett-Packard Development Company, L.P.
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file Mbr.c.

Function Documentation

PartitionInstallMbrChildHandles()

EFI_STATUS PartitionInstallMbrChildHandles	(	IN EFI_DRIVER_BINDING_PROTOCOL *	This,
		IN EFI_HANDLE	Handle,
		IN EFI_DISK_IO_PROTOCOL *	DiskIo,
		IN EFI_DISK_IO2_PROTOCOL *	DiskIo2,
		IN EFI_BLOCK_IO_PROTOCOL *	BlockIo,
		IN EFI_BLOCK_IO2_PROTOCOL *	BlockIo2,
		IN EFI_DEVICE_PATH_PROTOCOL *	DevicePath )

Install child handles if the Handle supports MBR format.

Parameters

[in]	This	Calling context.
[in]	Handle	Parent Handle.
[in]	DiskIo	Parent DiskIo interface.
[in]	DiskIo2	Parent DiskIo2 interface.
[in]	BlockIo	Parent BlockIo interface.
[in]	BlockIo2	Parent BlockIo2 interface.
[in]	DevicePath	Parent Device Path.

Return values

EFI_SUCCESS	A child handle was added.
EFI_MEDIA_CHANGED	Media change was detected.
Others	MBR partition was not found.

Definition at line 118 of file Mbr.c.

PartitionValidMbr()

BOOLEAN PartitionValidMbr	(	IN MASTER_BOOT_RECORD *	Mbr,
		IN EFI_LBA	LastLba )

Test to see if the Mbr buffer is a valid MBR.

Parameters

Mbr	Parent Handle.
LastLba	Last Lba address on the device.

Return values

TRUE	Mbr is a Valid MBR.
FALSE	Mbr is not a Valid MBR.

Definition at line 34 of file Mbr.c.