mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-24 11:45:27 +01:00
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/** @file
|
|
GUID used for MemoryOverwriteRequestControl UEFI variable defined in
|
|
TCG Platform Reset Attack Mitigation Specification 1.00.
|
|
See http://trustedcomputinggroup.org for the latest specification
|
|
|
|
The purpose of the MemoryOverwriteRequestControl UEFI variable is to give users (e.g., OS, loader) the ability to
|
|
indicate to the platform that secrets are present in memory and that the platform firmware must clear memory upon
|
|
a restart. The OS loader should not create the variable. Rather, the firmware is required to create it.
|
|
|
|
Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#ifndef _MEMORY_OVERWRITE_CONTROL_DATA_GUID_H_
|
|
#define _MEMORY_OVERWRITE_CONTROL_DATA_GUID_H_
|
|
|
|
#define MEMORY_ONLY_RESET_CONTROL_GUID \
|
|
{ \
|
|
0xe20939be, 0x32d4, 0x41be, {0xa1, 0x50, 0x89, 0x7f, 0x85, 0xd4, 0x98, 0x29} \
|
|
}
|
|
|
|
///
|
|
/// Variable name is "MemoryOverwriteRequestControl" and it is a 1 byte unsigned value.
|
|
/// The attributes should be:
|
|
/// EFI_VARIABLE_NON_VOLATILE |
|
|
/// EFI_VARIABLE_BOOTSERVICE_ACCESS |
|
|
/// EFI_VARIABLE_RUNTIME_ACCESS
|
|
///
|
|
#define MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME L"MemoryOverwriteRequestControl"
|
|
|
|
///
|
|
/// 0 = Firmware MUST clear the MOR bit
|
|
/// 1 = Firmware MUST set the MOR bit
|
|
///
|
|
#define MOR_CLEAR_MEMORY_BIT_MASK 0x01
|
|
|
|
///
|
|
/// 0 = Firmware MAY autodetect a clean shutdown of the Static RTM OS.
|
|
/// 1 = Firmware MUST NOT autodetect a clean shutdown of the Static RTM OS.
|
|
///
|
|
#define MOR_DISABLEAUTODETECT_BIT_MASK 0x10
|
|
|
|
///
|
|
/// MOR field bit offset
|
|
///
|
|
#define MOR_CLEAR_MEMORY_BIT_OFFSET 0
|
|
#define MOR_DISABLEAUTODETECT_BIT_OFFSET 4
|
|
|
|
/**
|
|
Return the ClearMemory bit value 0 or 1.
|
|
|
|
@param mor 1 byte value that contains ClearMemory and DisableAutoDetect bit.
|
|
|
|
@return ClearMemory bit value
|
|
**/
|
|
#define MOR_CLEAR_MEMORY_VALUE(mor) (((UINT8)(mor) & MOR_CLEAR_MEMORY_BIT_MASK) >> MOR_CLEAR_MEMORY_BIT_OFFSET)
|
|
|
|
/**
|
|
Return the DisableAutoDetect bit value 0 or 1.
|
|
|
|
@param mor 1 byte value that contains ClearMemory and DisableAutoDetect bit.
|
|
|
|
@return DisableAutoDetect bit value
|
|
**/
|
|
#define MOR_DISABLE_AUTO_DETECT_VALUE(mor) (((UINT8)(mor) & MOR_DISABLEAUTODETECT_BIT_MASK) >> MOR_DISABLEAUTODETECT_BIT_OFFSET)
|
|
|
|
extern EFI_GUID gEfiMemoryOverwriteControlDataGuid;
|
|
|
|
#endif
|