mirror of https://github.com/acidanthera/audk.git
181 lines
5.9 KiB
C
181 lines
5.9 KiB
C
/** @file
|
|
UEFI variable support functions for Firmware Management Protocol based
|
|
firmware updates.
|
|
|
|
Copyright (c) 2016, Microsoft Corporation. All rights reserved.<BR>
|
|
Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
1. Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright notice,
|
|
this list of conditions and the following disclaimer in the documentation
|
|
and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
**/
|
|
|
|
#ifndef __VARIABLE_SUPPORT_H__
|
|
#define __VARIABLE_SUPPORT_H__
|
|
|
|
#define DEFAULT_VERSION 0x1
|
|
#define DEFAULT_LOWESTSUPPORTEDVERSION 0x0
|
|
#define DEFAULT_LASTATTEMPT 0x0
|
|
|
|
#define VARNAME_VERSION L"FmpVersion"
|
|
#define VARNAME_LSV L"FmpLsv"
|
|
|
|
#define VARNAME_LASTATTEMPTSTATUS L"LastAttemptStatus"
|
|
#define VARNAME_LASTATTEMPTVERSION L"LastAttemptVersion"
|
|
|
|
/**
|
|
Returns the value used to fill in the Version field of the
|
|
EFI_FIRMWARE_IMAGE_DESCRIPTOR structure that is returned by the GetImageInfo()
|
|
service of the Firmware Management Protocol. The value is read from a UEFI
|
|
variable. If the UEFI variables does not exist, then a default version value
|
|
is returned.
|
|
|
|
UEFI Variable accessed: GUID = gEfiCallerIdGuid, Name = L"FmpVersion"
|
|
|
|
@return The version of the firmware image in the firmware device.
|
|
|
|
**/
|
|
UINT32
|
|
GetVersionFromVariable (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Returns the value used to fill in the LowestSupportedVersion field of the
|
|
EFI_FIRMWARE_IMAGE_DESCRIPTOR structure that is returned by the GetImageInfo()
|
|
service of the Firmware Management Protocol. The value is read from a UEFI
|
|
variable. If the UEFI variables does not exist, then a default lowest
|
|
supported version value is returned.
|
|
|
|
UEFI Variable accessed: GUID = gEfiCallerIdGuid, Name = L"FmpLsv"
|
|
|
|
@return The lowest supported version of the firmware image in the firmware
|
|
device.
|
|
|
|
**/
|
|
UINT32
|
|
GetLowestSupportedVersionFromVariable (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Returns the value used to fill in the LastAttemptStatus field of the
|
|
EFI_FIRMWARE_IMAGE_DESCRIPTOR structure that is returned by the GetImageInfo()
|
|
service of the Firmware Management Protocol. The value is read from a UEFI
|
|
variable. If the UEFI variables does not exist, then a default last attempt
|
|
status value is returned.
|
|
|
|
UEFI Variable accessed: GUID = gEfiCallerIdGuid, Name = L"LastAttemptStatus"
|
|
|
|
@return The last attempt status value for the most recent capsule update.
|
|
|
|
**/
|
|
UINT32
|
|
GetLastAttemptStatusFromVariable (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Returns the value used to fill in the LastAttemptVersion field of the
|
|
EFI_FIRMWARE_IMAGE_DESCRIPTOR structure that is returned by the GetImageInfo()
|
|
service of the Firmware Management Protocol. The value is read from a UEFI
|
|
variable. If the UEFI variables does not exist, then a default last attempt
|
|
version value is returned.
|
|
|
|
UEFI Variable accessed: GUID = gEfiCallerIdGuid, Name = L"LastAttemptVersion"
|
|
|
|
@return The last attempt version value for the most recent capsule update.
|
|
|
|
**/
|
|
UINT32
|
|
GetLastAttemptVersionFromVariable (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
Saves the version current of the firmware image in the firmware device to a
|
|
UEFI variable.
|
|
|
|
UEFI Variable accessed: GUID = gEfiCallerIdGuid, Name = L"FmpVersion"
|
|
|
|
@param[in] Version The version of the firmware image in the firmware device.
|
|
|
|
**/
|
|
VOID
|
|
SetVersionInVariable (
|
|
UINT32 Version
|
|
);
|
|
|
|
/**
|
|
Saves the lowest supported version current of the firmware image in the
|
|
firmware device to a UEFI variable.
|
|
|
|
UEFI Variable accessed: GUID = gEfiCallerIdGuid, Name = L"FmpLsv"
|
|
|
|
@param[in] LowestSupportedVersion The lowest supported version of the firmware image
|
|
in the firmware device.
|
|
|
|
**/
|
|
VOID
|
|
SetLowestSupportedVersionInVariable (
|
|
UINT32 LowestSupportedVersion
|
|
);
|
|
|
|
/**
|
|
Saves the last attempt status value of the most recent FMP capsule update to a
|
|
UEFI variable.
|
|
|
|
UEFI Variable accessed: GUID = gEfiCallerIdGuid, Name = L"LastAttemptStatus"
|
|
|
|
@param[in] LastAttemptStatus The last attempt status of the most recent FMP
|
|
capsule update.
|
|
|
|
**/
|
|
VOID
|
|
SetLastAttemptStatusInVariable (
|
|
UINT32 LastAttemptStatus
|
|
);
|
|
|
|
/**
|
|
Saves the last attempt version value of the most recent FMP capsule update to
|
|
a UEFI variable.
|
|
|
|
UEFI Variable accessed: GUID = gEfiCallerIdGuid, Name = L"LastAttemptVersion"
|
|
|
|
@param[in] LastAttemptVersion The last attempt version value of the most
|
|
recent FMP capsule update.
|
|
|
|
**/
|
|
VOID
|
|
SetLastAttemptVersionInVariable (
|
|
UINT32 LastAttemptVersion
|
|
);
|
|
|
|
/**
|
|
Locks all the UEFI Variables that use gEfiCallerIdGuid of the currently
|
|
executing module.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
LockAllFmpVariables (
|
|
VOID
|
|
);
|
|
|
|
#endif
|