Rename module name from ***To*** to ***On***. AAAOnBBB means this module produce AAA Protocol/PPI based on BBB. This change improves the readability.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7328 6f19259b-4bc3-4df7-8a09-765794883524
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qwang12
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/** @file
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Module produce EFI_PEI_READ_ONLY_VARIABLE2_PPI on top of EFI_PEI_READ_ONLY_VARIABLE_PPI.
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UEFI PI Spec supersedes Intel's Framework Specs.
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EFI_PEI_READ_ONLY_VARIABLE_PPI defined in Intel Framework Pkg is replaced by EFI_PEI_READ_ONLY_VARIABLE2_PPI
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in MdePkg.
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This module produces EFI_PEI_READ_ONLY_VARIABLE2_PPI on top of EFI_PEI_READ_ONLY_VARIABLE_PPI.
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This module is used on platform when both of these two conditions are true:
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1) Framework module produces EFI_PEI_READ_ONLY_VARIABLE_PPI is present.
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2) The platform has PI modules that only consumes EFI_PEI_READ_ONLY_VARIABLE2_PPI.
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This module can't be used together with ReadOnlyVariableToReadOnlyVariable2Thunk module.
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Copyright (c) 2006 - 2008 Intel Corporation. <BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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**/
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#include <PiPei.h>
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#include <Ppi/ReadOnlyVariable2.h>
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#include <Ppi/ReadOnlyVariable.h>
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#include <Ppi/ReadOnlyVariableThunkPresent.h>
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#include <Library/DebugLib.h>
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#include <Library/PeiServicesTablePointerLib.h>
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#include <Library/PeiServicesLib.h>
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//
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// Function Prototypes
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//
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EFI_STATUS
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EFIAPI
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PeiGetVariable (
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IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
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IN CONST CHAR16 *VariableName,
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IN CONST EFI_GUID *VariableGuid,
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OUT UINT32 *Attributes,
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IN OUT UINTN *DataSize,
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OUT VOID *Data
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);
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EFI_STATUS
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EFIAPI
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PeiGetNextVariableName (
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IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
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IN OUT UINTN *VariableNameSize,
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IN OUT CHAR16 *VariableName,
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IN OUT EFI_GUID *VariableGuid
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);
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//
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// Module globals
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//
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EFI_PEI_READ_ONLY_VARIABLE2_PPI mVariablePpi = {
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PeiGetVariable,
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PeiGetNextVariableName
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};
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EFI_PEI_PPI_DESCRIPTOR mPpiListVariable = {
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(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
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&gEfiPeiReadOnlyVariable2PpiGuid,
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&mVariablePpi
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};
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EFI_PEI_PPI_DESCRIPTOR mReadOnlyVariableThunkPresent = {
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(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
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&gPeiReadonlyVariableThunkPresentPpiGuid,
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NULL
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};
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/**
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User entry for this PEIM driver.
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@param FileHandle Handle of the file being invoked.
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@param PeiServices Describes the list of possible PEI Services.
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@retval EFI_SUCCESS ReadOnlyVariable2 PPI is successfully installed.
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@return Others ReadOnlyVariable2 PPI is not successfully installed.
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**/
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EFI_STATUS
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EFIAPI
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PeimInitializeReadOnlyVariable2 (
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IN EFI_PEI_FILE_HANDLE FfsHeader,
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IN CONST EFI_PEI_SERVICES **PeiServices
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)
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{
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VOID *Interface;
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EFI_STATUS Status;
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//
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// This thunk module can only be used together with a PI PEI core, as we
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// assume PeiServices Pointer Table can be located in a standard way defined
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// in PI spec.
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//
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ASSERT ((*PeiServices)->Hdr.Revision >= 0x00010000);
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//
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// Make sure ReadOnlyVariable2ToReadOnlyVariable module is not present. If so, the call chain will form a
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// infinite loop: ReadOnlyVariable2 -> ReadOnlyVariable -> ReadOnlyVariable2 -> ....
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//
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Status = PeiServicesLocatePpi (&gPeiReadonlyVariableThunkPresentPpiGuid, 0, NULL, &Interface);
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ASSERT (Status == EFI_NOT_FOUND);
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Status = PeiServicesInstallPpi (&mReadOnlyVariableThunkPresent);
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ASSERT_EFI_ERROR (Status);
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//
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// Publish the variable capability to other modules
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//
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return PeiServicesInstallPpi (&mPpiListVariable);
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}
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/**
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Provide the read variable functionality of the variable services.
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@param PeiServices General purpose services available to every PEIM.
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@param VariableName The variable name
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@param VendorGuid The vendor's GUID
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@param Attributes Pointer to the attribute
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@param DataSize Size of data
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@param Data Pointer to data
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@retval EFI_SUCCESS The interface could be successfully installed
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@retval EFI_NOT_FOUND The variable could not be discovered
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@retval EFI_BUFFER_TOO_SMALL The caller buffer is not large enough
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**/
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EFI_STATUS
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EFIAPI
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PeiGetVariable (
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IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
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IN CONST CHAR16 *VariableName,
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IN CONST EFI_GUID *VariableGuid,
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OUT UINT32 *Attributes,
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IN OUT UINTN *DataSize,
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OUT VOID *Data
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)
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{
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EFI_STATUS Status;
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EFI_PEI_READ_ONLY_VARIABLE_PPI *ReadOnlyVariable;
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Status = PeiServicesLocatePpi (
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&gEfiPeiReadOnlyVariablePpiGuid,
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0,
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NULL,
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(VOID **)&ReadOnlyVariable
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);
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ASSERT_EFI_ERROR (Status);
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return ReadOnlyVariable->PeiGetVariable (
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(EFI_PEI_SERVICES **) GetPeiServicesTablePointer (),
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(CHAR16 *)VariableName,
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(EFI_GUID *)VariableGuid,
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Attributes,
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DataSize,
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Data
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);
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}
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/**
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Provide the get next variable functionality of the variable services.
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@param PeiServices General purpose services available to every PEIM.
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@param VariabvleNameSize The variable name's size.
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@param VariableName A pointer to the variable's name.
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@param VariableGuid A pointer to the EFI_GUID structure.
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@param VariableNameSize Size of the variable name
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@param VariableName The variable name
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@param VendorGuid The vendor's GUID
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@retval EFI_SUCCESS The interface could be successfully installed
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@retval EFI_NOT_FOUND The variable could not be discovered
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**/
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EFI_STATUS
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EFIAPI
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PeiGetNextVariableName (
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IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
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IN OUT UINTN *VariableNameSize,
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IN OUT CHAR16 *VariableName,
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IN OUT EFI_GUID *VariableGuid
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)
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{
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EFI_STATUS Status;
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EFI_PEI_READ_ONLY_VARIABLE_PPI *ReadOnlyVariable;
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Status = PeiServicesLocatePpi (
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&gEfiPeiReadOnlyVariablePpiGuid,
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0,
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NULL,
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(VOID **)&ReadOnlyVariable
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);
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ASSERT_EFI_ERROR (Status);
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return ReadOnlyVariable->PeiGetNextVariableName (
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(EFI_PEI_SERVICES **) GetPeiServicesTablePointer (),
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VariableNameSize,
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VariableName,
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VariableGuid
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);
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}
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@@ -0,0 +1,65 @@
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#/** @file
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# Module produce EFI_PEI_READ_ONLY_VARIABLE_PPI top of EFI_PEI_READ_ONLY_VARIABLE2_PPI .
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#
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# UEFI PI Spec supersedes Intel's Framework Specs.
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# EFI_PEI_READ_ONLY_VARIABLE_PPI defined in Intel Framework Pkg is replaced by EFI_PEI_READ_ONLY_VARIABLE2_PPI
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# in MdePkg.
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# This module produces EFI_PEI_READ_ONLY_VARIABLE2_PPI on top of EFI_PEI_READ_ONLY_VARIABLE_PPI .
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# This module is used on platform when both of these two conditions are true:
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# 1) Framework module produces EFI_PEI_READ_ONLY_VARIABLE_PPI is present.
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# 2) The platform has PI modules that consumes EFI_PEI_READ_ONLY_VARIABLE2_PPI.
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#
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# This module can't be used together with ReadOnlyVariableToReadOnlyVariable2Thunk module.
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#
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#
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# PEIM to provide the Variable functionality.
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# Copyright (c) 2006 - 2007, Intel Corporation
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#
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# All rights reserved. This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#
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#**/
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = ReadOnlyVariable2ToReadOnlyVariableThunk
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FILE_GUID = 950216A2-A621-479c-A13D-2990617BDFE7
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MODULE_TYPE = PEIM
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VERSION_STRING = 1.0
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EDK_RELEASE_VERSION = 0x00020000
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EFI_SPECIFICATION_VERSION = 0x00020000
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ENTRY_POINT = PeimInitializeReadOnlyVariable2
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#
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# The following information is for reference only and not required by the build tools.
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#
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# VALID_ARCHITECTURES = IA32 X64 IPF EBC
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#
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[Sources.common]
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ReadOnlyVariable2ToReadOnlyVariableThunk.c
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[Packages]
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MdePkg/MdePkg.dec
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EdkCompatibilityPkg/EdkCompatibilityPkg.dec
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IntelFrameworkPkg/IntelFrameworkPkg.dec
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[LibraryClasses]
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PeimEntryPoint
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PeiServicesLib
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PeiServicesTablePointerLib
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DebugLib
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[Ppis]
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gEfiPeiReadOnlyVariablePpiGuid # PPI ALWAYS_CONSUMED
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gEfiPeiReadOnlyVariable2PpiGuid # PPI ALWAYS_PRODUCED
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gPeiReadonlyVariableThunkPresentPpiGuid
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[Depex]
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gEfiPeiReadOnlyVariablePpiGuid
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Reference in New Issue
Block a user