92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/** @file
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Library Instance implementation for IRSI Read Variable
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;******************************************************************************
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;* Copyright (c) 2012 - 2014, Insyde Software Corp. All Rights Reserved.
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;*
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;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
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;* transmit, broadcast, present, recite, release, license or otherwise exploit
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;* any part of this publication in any form, by any means, without the prior
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;* written permission of Insyde Software Corporation.
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;*
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;******************************************************************************
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*/
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#include <Uefi.h>
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#include <Library/UefiRuntimeLib.h>
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#include <Library/IrsiLib.h>
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/**
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Irsi ReadVariable function
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This routine provides OS to call GetVariable() UEFI runtime services
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@param ReadVariableBuf pointer to IRSI_VARIABLE structure
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@param ReadVariableSize the size of ReadVariableBuf, normally it is equal to
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sizeof(IRSI_VARIABLE)
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@retval EFI_SUCESS Variable successfully read
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@retval other error codes failed to get variable
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**/
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EFI_STATUS
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EFIAPI
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IrsiReadVariable (
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VOID *ReadVariableBuf
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)
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{
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IRSI_VARIABLE *IrsiVar;
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VOID *VariableBuf;
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CHAR16 *VariableName;
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UINTN VariableSize;
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EFI_STATUS Status;
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IrsiVar = (IRSI_VARIABLE *)ReadVariableBuf;
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IrsiVar->Header.StructureSize = sizeof(IRSI_VARIABLE);
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VariableName = (CHAR16 *)(UINTN)IrsiVar->VariableNamePtr;
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VariableBuf = (VOID *)(UINTN)IrsiVar->VariableDataPtr;
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VariableSize = (UINTN)IrsiVar->VariableSize;
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Status = EfiGetVariable (
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VariableName,
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&IrsiVar->VariableGuid,
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&IrsiVar->Attribute,
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&VariableSize,
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VariableBuf);
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IrsiVar->VariableSize = (UINT32)VariableSize;
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IrsiVar->Header.ReturnStatus = IRSI_STATUS(Status);
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return Status;
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}
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/**
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IRSI ReadVariable Initialization
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This routine is a LibraryClass constructor for IrsiReadVariable, it will
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register IrsiReadVariable function to the Irsi function database
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@param ImageHandle A handle for the image that is initializing this driver
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@param SystemTable A pointer to the EFI system table
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@retval EFI_SUCCESS Module initialized successfully
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@retval Others Module initialization failed
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**/
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EFI_STATUS
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EFIAPI
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IrsiReadVariableInit (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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Status = IrsiRegisterFunction (
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&gIrsiServicesGuid,
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IRSI_READ_VARIABLE_COMMAND,
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IrsiReadVariable
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);
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return Status;
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} |