TcgMor.c File Reference

#include "TcgMor.h"

Go to the source code of this file.

Functions
VOID EFIAPI	OnReadyToBoot (IN EFI_EVENT Event, IN VOID *Context)
VOID	InitiateTPerReset (IN EFI_STORAGE_SECURITY_COMMAND_PROTOCOL *Ssp, IN UINT32 MediaId)
VOID EFIAPI	TPerResetAtEndOfDxe (IN EFI_EVENT Event, IN VOID *Context)
EFI_STATUS EFIAPI	MorDriverEntryPoint (IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable)

Variables
UINT8	mMorControl

Detailed Description

TCG MOR (Memory Overwrite Request) Control Driver.

This driver initialize MemoryOverwriteRequestControl variable. It will clear MOR_CLEAR_MEMORY_BIT bit if it is set. It will also do TPer Reset for those encrypted drives through EFI_STORAGE_SECURITY_COMMAND_PROTOCOL at EndOfDxe.

Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file TcgMor.c.

Function Documentation

InitiateTPerReset()

VOID InitiateTPerReset	(	IN EFI_STORAGE_SECURITY_COMMAND_PROTOCOL *	Ssp,
		IN UINT32	MediaId
	)

Send TPer Reset command to reset eDrive to lock all protected bands. Typically, there are 2 mechanism for resetting eDrive. They are:

1. TPer Reset through IEEE 1667 protocol.
2. TPer Reset through native TCG protocol. This routine will detect what protocol the attached eDrive conform to, TCG or IEEE 1667 protocol. Then send out TPer Reset command separately.

Parameters

[in]	Ssp	The pointer to EFI_STORAGE_SECURITY_COMMAND_PROTOCOL instance.
[in]	MediaId	ID of the medium to receive data from or send data to.

Definition at line 73 of file TcgMor.c.

MorDriverEntryPoint()

EFI_STATUS EFIAPI MorDriverEntryPoint	(	IN EFI_HANDLE	ImageHandle,
		IN EFI_SYSTEM_TABLE *	SystemTable
	)

Entry Point for TCG MOR Control driver.

Parameters

[in]	ImageHandle	Image handle of this driver.
[in]	SystemTable	A Pointer to the EFI System Table.

Return values

EFI_SUCCESS

Returns

Others Some error occurs.

The firmware is required to create the MemoryOverwriteRequestControl UEFI variable.

Definition at line 307 of file TcgMor.c.

OnReadyToBoot()

VOID EFIAPI OnReadyToBoot	(	IN EFI_EVENT	Event,
		IN VOID *	Context
	)

Ready to Boot Event notification handler.

Parameters

[in]	Event	Event whose notification function is being invoked
[in]	Context	Pointer to the notification function's context

Definition at line 26 of file TcgMor.c.

TPerResetAtEndOfDxe()

VOID EFIAPI TPerResetAtEndOfDxe	(	IN EFI_EVENT	Event,
		IN VOID *	Context
	)

Notification function of END_OF_DXE.

Parameters

[in]	Event	Event whose notification function is being invoked.
[in]	Context	Pointer to the notification function's context.

Definition at line 236 of file TcgMor.c.

Variable Documentation

mMorControl

UINT8 mMorControl

Definition at line 15 of file TcgMor.c.