/** @file
|
Standalone MM Variable Write Lib
|
|
This library provides phase agnostic access to the UEFI Variable Services.
|
This is done by implementing a wrapper on top of the phase specific mechanism
|
for reading from UEFI variables.
|
|
This is the standalone MM specific LibraryClass constructor.
|
|
Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
**/
|
|
#include <Uefi/UefiBaseType.h>
|
|
#include <Protocol/SmmVariable.h>
|
|
#include <Library/DebugLib.h>
|
#include <Library/MmServicesTableLib.h>
|
|
extern EFI_SMM_VARIABLE_PROTOCOL *mVariableWriteLibSmmVariable;
|
|
/**
|
The constructor function acquires the EFI SMM Variable Services
|
|
@param ImageHandle The firmware allocated handle for the EFI image.
|
@param SystemTable A pointer to the MM System Table.
|
|
@retval EFI_SUCCESS The constructor always returns RETURN_SUCCESS.
|
@retval EFI_NOT_FOUND gEfiSmmVariableProtocolGuid Protocol interface not
|
found, which technically should not be possible since
|
this protocol is in the LibraryClass DEPEX
|
|
**/
|
EFI_STATUS
|
EFIAPI
|
StandaloneMmVariableWriteLibConstructor (
|
IN EFI_HANDLE ImageHandle,
|
IN EFI_MM_SYSTEM_TABLE *SystemTable
|
)
|
{
|
EFI_STATUS Status;
|
|
//
|
// Locate SmmVariableProtocol.
|
//
|
Status = gMmst->MmLocateProtocol (&gEfiSmmVariableProtocolGuid, NULL, (VOID **) &mVariableWriteLibSmmVariable);
|
ASSERT_EFI_ERROR (Status);
|
return Status;
|
}
|
