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Add variablePei module into MdeModulePkg. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2838 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
klu2 2007-06-28 09:00:08 +00:00
parent de4c8a3080
commit 7ff7768df2
13 changed files with 1191 additions and 2 deletions
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3
MdeModulePkg/MdeModulePkg.dsc
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@ -318,4 +318,5 @@
${WORKSPACE}/MdeModulePkg/Universal/FirmwareVolume/FaultTolerantWriteLite/Dxe/FtwLite.inf ${WORKSPACE}/MdeModulePkg/Universal/FirmwareVolume/FaultTolerantWriteLite/Dxe/FtwLite.inf
#${WORKSPACE}/MdeModulePkg/Universal/FirmwareVolume/GuidedSectionExtraction/Crc32SectionExtract/Dxe/Crc32SectionExtract.inf #${WORKSPACE}/MdeModulePkg/Universal/FirmwareVolume/GuidedSectionExtraction/Crc32SectionExtract/Dxe/Crc32SectionExtract.inf
${WORKSPACE}/MdeModulePkg/Bus/Pci/AtapiPassThru/Dxe/AtapiPassThru.inf ${WORKSPACE}/MdeModulePkg/Bus/Pci/AtapiPassThru/Dxe/AtapiPassThru.inf
${WORKSPACE}/MdeModulePkg/Universal/WatchDogTimerDxe/WatchDogTimer.inf ${WORKSPACE}/MdeModulePkg/Universal/WatchDogTimerDxe/WatchDogTimer.inf
#${WORKSPACE}/MdeModulePkg/Universal/VariablePei/Variable.inf

19
MdeModulePkg/Universal/VariablePei/Ebc/VarMachine.h Normal file
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/**@file
Variable Machine Type
Copyright (c) 2006 - 2007 Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _VAR_MACHINE_H
#define _VAR_MACHINE_H
#endif

19
MdeModulePkg/Universal/VariablePei/Ia32/VarMachine.h Normal file
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/**@file
Variable Machine Type
Copyright (c) 2006 - 2007 Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _VAR_MACHINE_H
#define _VAR_MACHINE_H
#endif

19
MdeModulePkg/Universal/VariablePei/Ipf/VarMachine.h Normal file
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/**@file
Variable Machine Type
Copyright (c) 2006 - 2007 Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _VAR_MACHINE_H
#define _VAR_MACHINE_H
#endif

74
MdeModulePkg/Universal/VariablePei/Ipf/VariableWorker.c Normal file
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/** @file
Variable worker functions.
Copyright (c) 2006, Intel Corporation<BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
//
// The package level header files this module uses
//
#include <PiPei.h>
//
// The protocols, PPI and GUID defintions for this module
//
#include <Ppi/ReadOnlyVariable.h>
//
// The Library classes this module consumes
//
#include <Library/DebugLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/HobLib.h>
#include <Library/PcdLib.h>
#include <Library/BaseMemoryLib.h>
#include <Variable.h>
/**
Get one variable by the index count.
@param IndexTable The pointer to variable index table.
@param Count The index count of variable in index table.
@return The pointer to variable header indexed by count.
**/
VARIABLE_HEADER *
GetVariableByIndex (
IN VARIABLE_INDEX_TABLE *IndexTable,
IN UINT32 Count
)
{
return (VARIABLE_HEADER *) (UINTN) ((((UINT32)IndexTable->Index[Count]) << 2) + ((UINT32)(UINTN)IndexTable->StartPtr & 0xFFFC0000) );
}
/**
Record Variable in VariableIndex HOB.
Record Variable in VariableIndex HOB and update the length of variable index table.
@param IndexTable The pointer to variable index table.
@param Variable The pointer to the variable that will be recorded.
@retval VOID
**/
VOID
VariableIndexTableUpdate (
IN OUT VARIABLE_INDEX_TABLE *IndexTable,
IN VARIABLE_HEADER *Variable
)
{
IndexTable->Index[IndexTable->Length++] = (UINT16) (((UINT32)(UINTN) Variable) >> 2);
return;
}

538
MdeModulePkg/Universal/VariablePei/Variable.c Normal file
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/*++
Copyright (c) 2006 - 2007 Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
Variable.c
Abstract:
Framework PEIM to provide the Variable functionality
--*/
//
// The package level header files this module uses
//
#include <PiPei.h>
//
// The protocols, PPI and GUID defintions for this module
//
#include <Ppi/ReadOnlyVariable.h>
//
// The Library classes this module consumes
//
#include <Library/DebugLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/HobLib.h>
#include <Library/PcdLib.h>
#include <Library/BaseMemoryLib.h>
#include <Variable.h>
//
// Module globals
//
static EFI_PEI_READ_ONLY_VARIABLE_PPI mVariablePpi = {
PeiGetVariable,
PeiGetNextVariableName
};
static EFI_PEI_PPI_DESCRIPTOR mPpiListVariable = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiPeiReadOnlyVariablePpiGuid,
&mVariablePpi
};
EFI_GUID mEfiVariableIndexTableGuid = EFI_VARIABLE_INDEX_TABLE_GUID;
EFI_STATUS
EFIAPI
PeimInitializeVariableServices (
IN EFI_FFS_FILE_HEADER *FfsHeader,
IN EFI_PEI_SERVICES **PeiServices
)
/*++
Routine Description:
Provide the functionality of the variable services.
Arguments:
FfsHeadher - The FFS file header
PeiServices - General purpose services available to every PEIM.
Returns:
Status - EFI_SUCCESS if the interface could be successfully
installed
--*/
{
//
// Publish the variable capability to other modules
//
return (**PeiServices).InstallPpi (PeiServices, &mPpiListVariable);
}
STATIC
VARIABLE_HEADER *
GetNextVariablePtr (
IN VARIABLE_HEADER *Variable
)
/*++
Routine Description:
This code checks if variable header is valid or not.
Arguments:
Variable Pointer to the Variable Header.
Returns:
TRUE Variable header is valid.
FALSE Variable header is not valid.
--*/
{
return (VARIABLE_HEADER *) ((UINTN) GET_VARIABLE_DATA_PTR (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize));
}
STATIC
BOOLEAN
EFIAPI
IsValidVariableHeader (
IN VARIABLE_HEADER *Variable
)
/*++
Routine Description:
This code checks if variable header is valid or not.
Arguments:
Variable Pointer to the Variable Header.
Returns:
TRUE Variable header is valid.
FALSE Variable header is not valid.
--*/
{
if (Variable == NULL ||
Variable->StartId != VARIABLE_DATA ||
(sizeof (VARIABLE_HEADER) + Variable->DataSize + Variable->NameSize) > MAX_VARIABLE_SIZE
) {
return FALSE;
}
return TRUE;
}
STATIC
VARIABLE_STORE_STATUS
EFIAPI
GetVariableStoreStatus (
IN VARIABLE_STORE_HEADER *VarStoreHeader
)
/*++
Routine Description:
This code gets the pointer to the variable name.
Arguments:
VarStoreHeader Pointer to the Variable Store Header.
Returns:
EfiRaw Variable store is raw
EfiValid Variable store is valid
EfiInvalid Variable store is invalid
--*/
{
if (VarStoreHeader->Signature == VARIABLE_STORE_SIGNATURE &&
VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&
VarStoreHeader->State == VARIABLE_STORE_HEALTHY
) {
return EfiValid;
}
if (VarStoreHeader->Signature == 0xffffffff &&
VarStoreHeader->Size == 0xffffffff &&
VarStoreHeader->Format == 0xff &&
VarStoreHeader->State == 0xff
) {
return EfiRaw;
} else {
return EfiInvalid;
}
}
STATIC
EFI_STATUS
CompareWithValidVariable (
IN VARIABLE_HEADER *Variable,
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
OUT VARIABLE_POINTER_TRACK *PtrTrack
)
/*++
Routine Description:
This function compares a variable with variable entries in database
Arguments:
Variable - Pointer to the variable in our database
VariableName - Name of the variable to compare to 'Variable'
VendorGuid - GUID of the variable to compare to 'Variable'
PtrTrack - Variable Track Pointer structure that contains
Variable Information.
Returns:
EFI_SUCCESS - Found match variable
EFI_NOT_FOUND - Variable not found
--*/
{
if (VariableName[0] == 0) {
PtrTrack->CurrPtr = Variable;
return EFI_SUCCESS;
} else {
//
// Don't use CompareGuid function here for performance reasons.
// Instead we compare the GUID a UINT32 at a time and branch
// on the first failed comparison.
//
if ((((INT32 *) VendorGuid)[0] == ((INT32 *) &Variable->VendorGuid)[0]) &&
(((INT32 *) VendorGuid)[1] == ((INT32 *) &Variable->VendorGuid)[1]) &&
(((INT32 *) VendorGuid)[2] == ((INT32 *) &Variable->VendorGuid)[2]) &&
(((INT32 *) VendorGuid)[3] == ((INT32 *) &Variable->VendorGuid)[3])
) {
if (!CompareMem (VariableName, GET_VARIABLE_NAME_PTR (Variable), Variable->NameSize)) {
PtrTrack->CurrPtr = Variable;
return EFI_SUCCESS;
}
}
}
return EFI_NOT_FOUND;
}
STATIC
EFI_STATUS
EFIAPI
FindVariable (
IN EFI_PEI_SERVICES **PeiServices,
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
OUT VARIABLE_POINTER_TRACK *PtrTrack
)
/*++
Routine Description:
This code finds variable in storage blocks (Non-Volatile)
Arguments:
PeiServices - General purpose services available to every PEIM.
VariableName - Name of the variable to be found
VendorGuid - Vendor GUID to be found.
PtrTrack - Variable Track Pointer structure that contains
Variable Information.
Returns:
EFI_SUCCESS - Variable found successfully
EFI_NOT_FOUND - Variable not found
EFI_INVALID_PARAMETER - Invalid variable name
--*/
{
EFI_HOB_GUID_TYPE *GuidHob;
VARIABLE_STORE_HEADER *VariableStoreHeader;
VARIABLE_HEADER *Variable;
VARIABLE_HEADER *MaxIndex;
VARIABLE_INDEX_TABLE *IndexTable;
UINT32 Count;
UINT8 *VariableBase;
if (VariableName != 0 && VendorGuid == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// No Variable Address equals zero, so 0 as initial value is safe.
//
MaxIndex = 0;
GuidHob = GetFirstGuidHob (&mEfiVariableIndexTableGuid);
if (GuidHob == NULL) {
IndexTable = BuildGuidHob (&mEfiVariableIndexTableGuid, sizeof (VARIABLE_INDEX_TABLE));
IndexTable->Length = 0;
IndexTable->StartPtr = NULL;
IndexTable->EndPtr = NULL;
IndexTable->GoneThrough = 0;
} else {
IndexTable = GET_GUID_HOB_DATA (GuidHob);
for (Count = 0; Count < IndexTable->Length; Count++)
{
MaxIndex = GetVariableByIndex (IndexTable, Count);
if (CompareWithValidVariable (MaxIndex, VariableName, VendorGuid, PtrTrack) == EFI_SUCCESS) {
PtrTrack->StartPtr = IndexTable->StartPtr;
PtrTrack->EndPtr = IndexTable->EndPtr;
return EFI_SUCCESS;
}
}
if (IndexTable->GoneThrough) {
return EFI_NOT_FOUND;
}
}
//
// If not found in HOB, then let's start from the MaxIndex we've found.
//
if (MaxIndex != NULL) {
Variable = GetNextVariablePtr (MaxIndex);
} else {
if (IndexTable->StartPtr || IndexTable->EndPtr) {
Variable = IndexTable->StartPtr;
} else {
VariableBase = (UINT8 *) (UINTN) PcdGet32 (PcdFlashNvStorageVariableBase);
VariableStoreHeader = (VARIABLE_STORE_HEADER *) (VariableBase + \
((EFI_FIRMWARE_VOLUME_HEADER *) (VariableBase)) -> HeaderLength);
if (GetVariableStoreStatus (VariableStoreHeader) != EfiValid) {
return EFI_UNSUPPORTED;
}
if (~VariableStoreHeader->Size == 0) {
return EFI_NOT_FOUND;
}
//
// Find the variable by walk through non-volatile variable store
//
IndexTable->StartPtr = (VARIABLE_HEADER *) (VariableStoreHeader + 1);
IndexTable->EndPtr = (VARIABLE_HEADER *) ((UINTN) VariableStoreHeader + VariableStoreHeader->Size);
//
// Start Pointers for the variable.
// Actual Data Pointer where data can be written.
//
Variable = IndexTable->StartPtr;
}
}
//
// Find the variable by walk through non-volatile variable store
//
PtrTrack->StartPtr = IndexTable->StartPtr;
PtrTrack->EndPtr = IndexTable->EndPtr;
while (IsValidVariableHeader (Variable) && (Variable <= IndexTable->EndPtr)) {
if (Variable->State == VAR_ADDED) {
//
// Record Variable in VariableIndex HOB
//
if (IndexTable->Length < VARIABLE_INDEX_TABLE_VOLUME)
{
VariableIndexTableUpdate (IndexTable, Variable);
}
if (CompareWithValidVariable (Variable, VariableName, VendorGuid, PtrTrack) == EFI_SUCCESS) {
return EFI_SUCCESS;
}
}
Variable = GetNextVariablePtr (Variable);
}
//
// If gone through the VariableStore, that means we never find in Firmware any more.
//
if (IndexTable->Length < VARIABLE_INDEX_TABLE_VOLUME) {
IndexTable->GoneThrough = 1;
}
PtrTrack->CurrPtr = NULL;
return EFI_NOT_FOUND;
}
EFI_STATUS
EFIAPI
PeiGetVariable (
IN EFI_PEI_SERVICES **PeiServices,
IN CHAR16 *VariableName,
IN EFI_GUID * VendorGuid,
OUT UINT32 *Attributes OPTIONAL,
IN OUT UINTN *DataSize,
OUT VOID *Data
)
/*++
Routine Description:
Provide the read variable functionality of the variable services.
Arguments:
PeiServices - General purpose services available to every PEIM.
VariableName - The variable name
VendorGuid - The vendor's GUID
Attributes - Pointer to the attribute
DataSize - Size of data
Data - Pointer to data
Returns:
EFI_SUCCESS - The interface could be successfully installed
EFI_NOT_FOUND - The variable could not be discovered
EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough
--*/
{
VARIABLE_POINTER_TRACK Variable;
UINTN VarDataSize;
EFI_STATUS Status;
if (VariableName == NULL || VendorGuid == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// Find existing variable
//
Status = FindVariable (PeiServices, VariableName, VendorGuid, &Variable);
if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) {
return Status;
}
//
// Get data size
//
VarDataSize = Variable.CurrPtr->DataSize;
if (*DataSize >= VarDataSize) {
(*PeiServices)->CopyMem (Data, GET_VARIABLE_DATA_PTR (Variable.CurrPtr), VarDataSize);
if (Attributes != NULL) {
*Attributes = Variable.CurrPtr->Attributes;
}
*DataSize = VarDataSize;
return EFI_SUCCESS;
} else {
*DataSize = VarDataSize;
return EFI_BUFFER_TOO_SMALL;
}
}
EFI_STATUS
EFIAPI
PeiGetNextVariableName (
IN EFI_PEI_SERVICES **PeiServices,
IN OUT UINTN *VariableNameSize,
IN OUT CHAR16 *VariableName,
IN OUT EFI_GUID *VendorGuid
)
/*++
Routine Description:
Provide the get next variable functionality of the variable services.
Arguments:
PeiServices - General purpose services available to every PEIM.
VariabvleNameSize - The variable name's size.
VariableName - A pointer to the variable's name.
VendorGuid - A pointer to the EFI_GUID structure.
VariableNameSize - Size of the variable name
VariableName - The variable name
VendorGuid - The vendor's GUID
Returns:
EFI_SUCCESS - The interface could be successfully installed
EFI_NOT_FOUND - The variable could not be discovered
--*/
{
VARIABLE_POINTER_TRACK Variable;
UINTN VarNameSize;
EFI_STATUS Status;
if (VariableName == NULL) {
return EFI_INVALID_PARAMETER;
}
Status = FindVariable (PeiServices, VariableName, VendorGuid, &Variable);
if (Variable.CurrPtr == NULL || Status != EFI_SUCCESS) {
return Status;
}
if (VariableName[0] != 0) {
//
// If variable name is not NULL, get next variable
//
Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);
}
while (!(Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL)) {
if (IsValidVariableHeader (Variable.CurrPtr)) {
if (Variable.CurrPtr->State == VAR_ADDED) {
VarNameSize = (UINTN) Variable.CurrPtr->NameSize;
if (VarNameSize <= *VariableNameSize) {
(*PeiServices)->CopyMem (VariableName, GET_VARIABLE_NAME_PTR (Variable.CurrPtr), VarNameSize);
(*PeiServices)->CopyMem (VendorGuid, &Variable.CurrPtr->VendorGuid, sizeof (EFI_GUID));
Status = EFI_SUCCESS;
} else {
Status = EFI_BUFFER_TOO_SMALL;
}
*VariableNameSize = VarNameSize;
return Status;
//
// Variable is found
//
} else {
Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);
}
} else {
break;
}
}
return EFI_NOT_FOUND;
}

32
MdeModulePkg/Universal/VariablePei/Variable.dxs Normal file
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/*++
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
Variable.dxs
Abstract:
Dependency expression file for Variable PEIM.
--*/
//
// Include common header file for this module.
//
#include "CommonHeader.h"
#include <PeimDepex.h>
DEPENDENCY_START
TRUE
DEPENDENCY_END

184
MdeModulePkg/Universal/VariablePei/Variable.h Normal file
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/*++
Copyright (c) 2006 - 2007, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
Variable.h
Abstract:
Tiano PEIM to provide the variable functionality
--*/
#ifndef _PEI_VARIABLE_H
#define _PEI_VARIABLE_H
//
// BugBug: We need relcate the head file.
//
#include <Common/Variable.h>
#include <VarMachine.h>
//
// Define GET_PAD_SIZE to optimize compiler
//
#if ((ALIGNMENT == 0) || (ALIGNMENT == 1))
#define GET_PAD_SIZE(a) (0)
#else
#define GET_PAD_SIZE(a) (((~a) + 1) & (ALIGNMENT - 1))
#endif
#define GET_VARIABLE_NAME_PTR(a) (CHAR16 *) ((UINTN) (a) + sizeof (VARIABLE_HEADER))
#define GET_VARIABLE_DATA_PTR(a) \
(UINT8 *) ((UINTN) GET_VARIABLE_NAME_PTR (a) + (a)->NameSize + GET_PAD_SIZE ((a)->NameSize))
typedef struct {
VARIABLE_HEADER *CurrPtr;
VARIABLE_HEADER *EndPtr;
VARIABLE_HEADER *StartPtr;
} VARIABLE_POINTER_TRACK;
#define VARIABLE_INDEX_TABLE_VOLUME 122
#define EFI_VARIABLE_INDEX_TABLE_GUID \
{ 0x8cfdb8c8, 0xd6b2, 0x40f3, { 0x8e, 0x97, 0x02, 0x30, 0x7c, 0xc9, 0x8b, 0x7c } }
typedef struct {
UINT16 Length;
UINT16 GoneThrough;
VARIABLE_HEADER *EndPtr;
VARIABLE_HEADER *StartPtr;
UINT16 Index[VARIABLE_INDEX_TABLE_VOLUME];
} VARIABLE_INDEX_TABLE;
//
// Functions
//
EFI_STATUS
EFIAPI
PeimInitializeVariableServices (
IN EFI_FFS_FILE_HEADER *FfsHeader,
IN EFI_PEI_SERVICES **PeiServices
)
/*++
Routine Description:
TODO: Add function description
Arguments:
FfsHeader - TODO: add argument description
PeiServices - TODO: add argument description
Returns:
TODO: add return values
--*/
;
EFI_STATUS
EFIAPI
PeiGetVariable (
IN EFI_PEI_SERVICES **PeiServices,
IN CHAR16 *VariableName,
IN EFI_GUID * VendorGuid,
OUT UINT32 *Attributes OPTIONAL,
IN OUT UINTN *DataSize,
OUT VOID *Data
)
/*++
Routine Description:
TODO: Add function description
Arguments:
PeiServices - TODO: add argument description
VariableName - TODO: add argument description
VendorGuid - TODO: add argument description
Attributes - TODO: add argument description
DataSize - TODO: add argument description
Data - TODO: add argument description
Returns:
TODO: add return values
--*/
;
EFI_STATUS
EFIAPI
PeiGetNextVariableName (
IN EFI_PEI_SERVICES **PeiServices,
IN OUT UINTN *VariableNameSize,
IN OUT CHAR16 *VariableName,
IN OUT EFI_GUID *VendorGuid
)
/*++
Routine Description:
TODO: Add function description
Arguments:
PeiServices - TODO: add argument description
VariableNameSize - TODO: add argument description
VariableName - TODO: add argument description
VendorGuid - TODO: add argument description
Returns:
TODO: add return values
--*/
;
/**
Get one variable by the index count.
@param IndexTable The pointer to variable index table.
@param Count The index count of variable in index table.
@return The pointer to variable header indexed by count.
**/
VARIABLE_HEADER *
GetVariableByIndex (
IN VARIABLE_INDEX_TABLE *IndexTable,
IN UINT32 Count
);
/**
Record Variable in VariableIndex HOB.
Record Variable in VariableIndex HOB and update the length of variable index table.
@param IndexTable The pointer to variable index table.
@param Variable The pointer to the variable that will be recorded.
@retval VOID
**/
VOID
VariableIndexTableUpdate (
IN OUT VARIABLE_INDEX_TABLE *IndexTable,
IN VARIABLE_HEADER *Variable
);
#endif // _PEI_VARIABLE_H

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MdeModulePkg/Universal/VariablePei/Variable.inf Normal file
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#/** @file
# Component description file for PeiVariable module.
#
# Framework PEIM to provide the Variable functionality.
# Copyright (c) 2006 - 2007, Intel Corporation
#
# All rights reserved. This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#
#**/
################################################################################
#
# Defines Section - statements that will be processed to create a Makefile.
#
################################################################################
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = PeiVariable
FILE_GUID = 34C8C28F-B61C-45a2-8F2E-89E46BECC63B
MODULE_TYPE = PEIM
VERSION_STRING = 1.0
EDK_RELEASE_VERSION = 0x00020000
EFI_SPECIFICATION_VERSION = 0x00020000
ENTRY_POINT = PeimInitializeVariableServices
#
# The following information is for reference only and not required by the build tools.
#
# VALID_ARCHITECTURES = IA32 X64 IPF EBC
#
################################################################################
#
# Sources Section - list of files that are required for the build to succeed.
#
################################################################################
[Sources.common]
Variable.dxs
Variable.c
Variable.h
[Sources.Ia32]
Ia32/VarMachine.h
VariableWorker.c
[Sources.X64]
x64/VarMachine.h
VariableWorker.c
[Sources.IPF]
Ipf/VarMachine.h
Ipf/VariableWorker.c
[Sources.EBC]
Ebc/VarMachine.h
VariableWorker.c
################################################################################
#
# Includes Section - list of Include locations that are required for
# this module.
#
################################################################################
[Includes]
$(WORKSPACE)/MdePkg/Include/Library
################################################################################
#
# Package Dependency Section - list of Package files that are required for
# this module.
#
################################################################################
[Packages]
MdeModulePkg/MdeModulePkg.dec
MdePkg/MdePkg.dec
IntelFrameworkPkg/IntelFrameworkPkg.dec
################################################################################
#
# Library Class Section - list of Library Classes that are required for
# this module.
#
################################################################################
[LibraryClasses]
BaseMemoryLib
PcdLib
HobLib
PeimEntryPoint
DebugLib
################################################################################
#
# PPI C Name Section - list of PPI and PPI Notify C Names that this module
# uses or produces.
#
################################################################################
[Ppis]
gEfiPeiReadOnlyVariablePpiGuid # PPI ALWAYS_CONSUMED
################################################################################
#
# Pcd DYNAMIC - list of PCDs that this module is coded for.
#
################################################################################
[PcdsDynamic.common]
PcdFlashNvStorageVariableBase|gEfiGenericPlatformTokenSpaceGuid
[depex]
TRUE

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MdeModulePkg/Universal/VariablePei/Variable.msa Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<ModuleSurfaceArea xmlns="http://www.TianoCore.org/2006/Edk2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<MsaHeader>
<ModuleName>PeiVariable</ModuleName>
<ModuleType>PEIM</ModuleType>
<GuidValue>34C8C28F-B61C-45a2-8F2E-89E46BECC63B</GuidValue>
<Version>1.0</Version>
<Abstract>Component description file for PeiVariable module.</Abstract>
<Description>Framework PEIM to provide the Variable functionality.</Description>
<Copyright>Copyright (c) 2006 - 2007, Intel Corporation</Copyright>
<License>All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.</License>
<Specification>FRAMEWORK_BUILD_PACKAGING_SPECIFICATION 0x00000052</Specification>
</MsaHeader>
<ModuleDefinitions>
<SupportedArchitectures>IA32 X64 IPF EBC</SupportedArchitectures>
<BinaryModule>false</BinaryModule>
<OutputFileBasename>PeiVariable</OutputFileBasename>
</ModuleDefinitions>
<LibraryClassDefinitions>
<LibraryClass Usage="ALWAYS_CONSUMED">
<Keyword>DebugLib</Keyword>
</LibraryClass>
<LibraryClass Usage="ALWAYS_CONSUMED">
<Keyword>PeimEntryPoint</Keyword>
</LibraryClass>
<LibraryClass Usage="ALWAYS_CONSUMED">
<Keyword>HobLib</Keyword>
</LibraryClass>
<LibraryClass Usage="ALWAYS_CONSUMED">
<Keyword>PcdLib</Keyword>
</LibraryClass>
<LibraryClass Usage="ALWAYS_CONSUMED">
<Keyword>BaseMemoryLib</Keyword>
</LibraryClass>
</LibraryClassDefinitions>
<SourceFiles>
<Filename>Variable.h</Filename>
<Filename>Variable.c</Filename>
<Filename>Variable.dxs</Filename>
<Filename SupArchList="IA32 X64 EBC">VariableWorker.c</Filename>
<Filename SupArchList="IPF">Ipf/VariableWorker.c</Filename>
<Filename SupArchList="IA32">Ia32/VarMachine.h</Filename>
<Filename SupArchList="EBC">Ebc/VarMachine.h</Filename>
<Filename SupArchList="X64">x64/VarMachine.h</Filename>
<Filename SupArchList="IPF">Ipf/VarMachine.h</Filename>
</SourceFiles>
<PackageDependencies>
<Package PackageGuid="5e0e9358-46b6-4ae2-8218-4ab8b9bbdcec"/>
<Package PackageGuid="68169ab0-d41b-4009-9060-292c253ac43d"/>
</PackageDependencies>
<PPIs>
<Ppi Usage="ALWAYS_CONSUMED">
<PpiCName>gEfiPeiReadOnlyVariablePpiGuid</PpiCName>
</Ppi>
</PPIs>
<Externs>
<Specification>EFI_SPECIFICATION_VERSION 0x00020000</Specification>
<Specification>EDK_RELEASE_VERSION 0x00020000</Specification>
<Extern>
<ModuleEntryPoint>PeimInitializeVariableServices</ModuleEntryPoint>
</Extern>
</Externs>
<PcdCoded>
<PcdEntry PcdItemType="DYNAMIC">
<C_Name>PcdFlashNvStorageVariableBase</C_Name>
<TokenSpaceGuidCName>gEfiGenericPlatformTokenSpaceGuid</TokenSpaceGuidCName>
<HelpText>The driver gets the Variable store base address from this PCD. This base address point to
an EFI_FIRMWARE_VOLUMN_HEADER struct.</HelpText>
</PcdEntry>
</PcdCoded>
</ModuleSurfaceArea>

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MdeModulePkg/Universal/VariablePei/VariableWorker.c Normal file
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/*++
Copyright (c) 2007, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
VariableWorker.c
Abstract:
Framework PEIM to provide the Variable functionality
--*/
//
// The package level header files this module uses
//
#include <PiPei.h>
//
// The protocols, PPI and GUID defintions for this module
//
#include <Ppi/ReadOnlyVariable.h>
//
// The Library classes this module consumes
//
#include <Library/DebugLib.h>
#include <Library/PeimEntryPoint.h>
#include <Library/HobLib.h>
#include <Library/PcdLib.h>
#include <Library/BaseMemoryLib.h>
#include <Variable.h>
/**
Get one variable by the index count.
@param IndexTable The pointer to variable index table.
@param Count The index count of variable in index table.
@return The pointer to variable header indexed by count.
**/
VARIABLE_HEADER *
GetVariableByIndex (
IN VARIABLE_INDEX_TABLE *IndexTable,
IN UINT32 Count
)
{
return (VARIABLE_HEADER *) (UINTN) (IndexTable->Index[Count] + ((UINTN) IndexTable->StartPtr & 0xFFFF0000));
}
/**
Record Variable in VariableIndex HOB.
Record Variable in VariableIndex HOB and update the length of variable index table.
@param IndexTable The pointer to variable index table.
@param Variable The pointer to the variable that will be recorded.
@retval VOID
**/
VOID
VariableIndexTableUpdate (
IN OUT VARIABLE_INDEX_TABLE *IndexTable,
IN VARIABLE_HEADER *Variable
)
{
IndexTable->Index[IndexTable->Length++] = (UINT16) (UINTN) Variable;
return;
}

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MdeModulePkg/Universal/VariablePei/x64/VarMachine.h Normal file
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/**@file
Variable Machine Type
Copyright (c) 2006 - 2007 Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _VAR_MACHINE_H
#define _VAR_MACHINE_H
#endif

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Nt32Pkg/Nt32.dsc
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${WORKSPACE}/MdeModulePkg/Universal/FirmwareVolume/FaultTolerantWriteLite/Dxe/FtwLite.inf ${WORKSPACE}/MdeModulePkg/Universal/FirmwareVolume/FaultTolerantWriteLite/Dxe/FtwLite.inf
#${WORKSPACE}/MdeModulePkg/Universal/FirmwareVolume/GuidedSectionExtraction/Crc32SectionExtract/Dxe/Crc32SectionExtract.inf #${WORKSPACE}/MdeModulePkg/Universal/FirmwareVolume/GuidedSectionExtraction/Crc32SectionExtract/Dxe/Crc32SectionExtract.inf
${WORKSPACE}/MdeModulePkg/Bus/Pci/AtapiPassThru/Dxe/AtapiPassThru.inf ${WORKSPACE}/MdeModulePkg/Bus/Pci/AtapiPassThru/Dxe/AtapiPassThru.inf
${WORKSPACE}/MdeModulePkg/Universal/WatchDogTimerDxe/WatchDogTimer.inf ${WORKSPACE}/MdeModulePkg/Universal/WatchDogTimerDxe/WatchDogTimer.inf
#${WORKSPACE}/MdeModulePkg/Universal/VariablePei/Variable.inf