mirror of https://github.com/acidanthera/audk.git
726 lines
20 KiB
C
726 lines
20 KiB
C
/** @file
|
|
Framework PEIM to provide the Variable functionality
|
|
|
|
Copyright (c) 2006 - 2008 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:
|
|
|
|
**/
|
|
|
|
|
|
#include "Variable.h"
|
|
|
|
//
|
|
// Module globals
|
|
//
|
|
EFI_PEI_READ_ONLY_VARIABLE_PPI mVariablePpi = {
|
|
PeiGetVariable,
|
|
PeiGetNextVariableName
|
|
};
|
|
|
|
EFI_PEI_READ_ONLY_VARIABLE2_PPI mVariable2Ppi = {
|
|
PeiGetVariable2,
|
|
PeiGetNextVariableName2
|
|
};
|
|
|
|
EFI_PEI_PPI_DESCRIPTOR mPpiListVariable[] = {
|
|
{
|
|
(EFI_PEI_PPI_DESCRIPTOR_PPI),
|
|
&gEfiPeiReadOnlyVariable2PpiGuid,
|
|
&mVariable2Ppi
|
|
},
|
|
{
|
|
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
|
|
&gEfiPeiReadOnlyVariablePpiGuid,
|
|
&mVariablePpi
|
|
}
|
|
};
|
|
|
|
EFI_GUID mEfiVariableIndexTableGuid = EFI_VARIABLE_INDEX_TABLE_GUID;
|
|
|
|
/**
|
|
Provide the functionality of the variable services.
|
|
|
|
@param FileHandle Handle of the file being invoked.
|
|
@param PeiServices Describes the list of possible PEI Services.
|
|
|
|
@return EFI_SUCCESS If the interface could be successfully installed.
|
|
@return EFI_UNSUPPORTED If current boot path is in recovery mode, then does not
|
|
install this interface.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PeimInitializeVariableServices (
|
|
IN EFI_PEI_FILE_HANDLE FileHandle,
|
|
IN CONST EFI_PEI_SERVICES **PeiServices
|
|
)
|
|
{
|
|
EFI_BOOT_MODE BootMode;
|
|
EFI_STATUS Status;
|
|
|
|
//
|
|
// Check if this is recovery boot path. If no, publish the variable access capability
|
|
// to other modules. If yes, the content of variable area is not reliable. Therefore,
|
|
// in this case we should not provide variable service to other pei modules.
|
|
//
|
|
Status = (*PeiServices)->GetBootMode (PeiServices, &BootMode);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
if (BootMode == BOOT_IN_RECOVERY_MODE) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
return (**PeiServices).InstallPpi (PeiServices, &mPpiListVariable[0]);
|
|
|
|
}
|
|
|
|
/**
|
|
This code gets the pointer to the first variable memory pointer byte
|
|
|
|
@param VarStoreHeader Pointer to the Variable Store Header.
|
|
|
|
@return VARIABLE_HEADER* Pointer to last unavailable Variable Header
|
|
|
|
**/
|
|
VARIABLE_HEADER *
|
|
GetStartPointer (
|
|
IN VARIABLE_STORE_HEADER *VarStoreHeader
|
|
)
|
|
{
|
|
//
|
|
// The end of variable store
|
|
//
|
|
return (VARIABLE_HEADER *) HEADER_ALIGN (VarStoreHeader + 1);
|
|
}
|
|
|
|
/**
|
|
This code gets the pointer to the last variable memory pointer byte
|
|
|
|
@param VarStoreHeader Pointer to the Variable Store Header.
|
|
|
|
@return VARIABLE_HEADER* Pointer to last unavailable Variable Header
|
|
|
|
**/
|
|
VARIABLE_HEADER *
|
|
GetEndPointer (
|
|
IN VARIABLE_STORE_HEADER *VarStoreHeader
|
|
)
|
|
|
|
{
|
|
//
|
|
// The end of variable store
|
|
//
|
|
return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VarStoreHeader + VarStoreHeader->Size);
|
|
}
|
|
|
|
/**
|
|
|
|
This code checks if variable header is valid or not.
|
|
|
|
@param Variable Pointer to the Variable Header.
|
|
|
|
@retval TRUE Variable header is valid.
|
|
@retval FALSE Variable header is not valid.
|
|
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
IsValidVariableHeader (
|
|
IN VARIABLE_HEADER *Variable
|
|
)
|
|
{
|
|
if (Variable == NULL || Variable->StartId != VARIABLE_DATA ) {
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
This code gets the size of name of variable.
|
|
|
|
@param Variable Pointer to the Variable Header.
|
|
|
|
@return UINTN Size of variable in bytes
|
|
|
|
**/
|
|
UINTN
|
|
NameSizeOfVariable (
|
|
IN VARIABLE_HEADER *Variable
|
|
)
|
|
{
|
|
if (Variable->State == (UINT8) (-1) ||
|
|
Variable->DataSize == (UINT32) -1 ||
|
|
Variable->NameSize == (UINT32) -1 ||
|
|
Variable->Attributes == (UINT32) -1) {
|
|
return 0;
|
|
}
|
|
return (UINTN) Variable->NameSize;
|
|
}
|
|
|
|
/**
|
|
This code gets the size of name of variable.
|
|
|
|
@param Variable Pointer to the Variable Header.
|
|
|
|
@return UINTN Size of variable in bytes
|
|
|
|
**/
|
|
UINTN
|
|
DataSizeOfVariable (
|
|
IN VARIABLE_HEADER *Variable
|
|
)
|
|
{
|
|
if (Variable->State == (UINT8) -1 ||
|
|
Variable->DataSize == (UINT32) -1 ||
|
|
Variable->NameSize == (UINT32) -1 ||
|
|
Variable->Attributes == (UINT32) -1) {
|
|
return 0;
|
|
}
|
|
return (UINTN) Variable->DataSize;
|
|
}
|
|
|
|
/**
|
|
This code gets the pointer to the variable name.
|
|
|
|
@param Variable Pointer to the Variable Header.
|
|
|
|
@return CHAR16* Pointer to Variable Name
|
|
|
|
**/
|
|
CHAR16 *
|
|
GetVariableNamePtr (
|
|
IN VARIABLE_HEADER *Variable
|
|
)
|
|
|
|
{
|
|
|
|
return (CHAR16 *) (Variable + 1);
|
|
}
|
|
|
|
/**
|
|
This code gets the pointer to the variable data.
|
|
|
|
@param Variable Pointer to the Variable Header.
|
|
|
|
@return UINT8* Pointer to Variable Data
|
|
|
|
**/
|
|
UINT8 *
|
|
GetVariableDataPtr (
|
|
IN VARIABLE_HEADER *Variable
|
|
)
|
|
{
|
|
UINTN Value;
|
|
|
|
//
|
|
// Be careful about pad size for alignment
|
|
//
|
|
Value = (UINTN) GetVariableNamePtr (Variable);
|
|
Value += NameSizeOfVariable (Variable);
|
|
Value += GET_PAD_SIZE (NameSizeOfVariable (Variable));
|
|
|
|
return (UINT8 *) Value;
|
|
}
|
|
|
|
/**
|
|
This code gets the pointer to the next variable header.
|
|
|
|
@param Variable Pointer to the Variable Header.
|
|
|
|
@return VARIABLE_HEADER* Pointer to next variable header.
|
|
|
|
**/
|
|
VARIABLE_HEADER *
|
|
GetNextVariablePtr (
|
|
IN VARIABLE_HEADER *Variable
|
|
)
|
|
|
|
{
|
|
UINTN Value;
|
|
|
|
if (!IsValidVariableHeader (Variable)) {
|
|
return NULL;
|
|
}
|
|
|
|
Value = (UINTN) GetVariableDataPtr (Variable);
|
|
Value += DataSizeOfVariable (Variable);
|
|
Value += GET_PAD_SIZE (DataSizeOfVariable (Variable));
|
|
|
|
//
|
|
// Be careful about pad size for alignment
|
|
//
|
|
return (VARIABLE_HEADER *) HEADER_ALIGN (Value);
|
|
}
|
|
|
|
/**
|
|
This code gets the pointer to the variable name.
|
|
|
|
@param VarStoreHeader Pointer to the Variable Store Header.
|
|
|
|
@retval EfiRaw Variable store is raw
|
|
@retval EfiValid Variable store is valid
|
|
@retval EfiInvalid Variable store is invalid
|
|
|
|
**/
|
|
VARIABLE_STORE_STATUS
|
|
EFIAPI
|
|
GetVariableStoreStatus (
|
|
IN VARIABLE_STORE_HEADER *VarStoreHeader
|
|
)
|
|
|
|
{
|
|
|
|
if (CompareGuid (&VarStoreHeader->Signature, &gEfiVariableGuid) &&
|
|
VarStoreHeader->Format == VARIABLE_STORE_FORMATTED &&
|
|
VarStoreHeader->State == VARIABLE_STORE_HEALTHY
|
|
) {
|
|
|
|
return EfiValid;
|
|
}
|
|
|
|
if (((UINT32 *)(&VarStoreHeader->Signature))[0] == 0xffffffff &&
|
|
((UINT32 *)(&VarStoreHeader->Signature))[1] == 0xffffffff &&
|
|
((UINT32 *)(&VarStoreHeader->Signature))[2] == 0xffffffff &&
|
|
((UINT32 *)(&VarStoreHeader->Signature))[3] == 0xffffffff &&
|
|
VarStoreHeader->Size == 0xffffffff &&
|
|
VarStoreHeader->Format == 0xff &&
|
|
VarStoreHeader->State == 0xff
|
|
) {
|
|
|
|
return EfiRaw;
|
|
} else {
|
|
return EfiInvalid;
|
|
}
|
|
}
|
|
|
|
/**
|
|
This function compares a variable with variable entries in database
|
|
|
|
@param Variable - Pointer to the variable in our database
|
|
@param VariableName - Name of the variable to compare to 'Variable'
|
|
@param VendorGuid - GUID of the variable to compare to 'Variable'
|
|
@param PtrTrack - Variable Track Pointer structure that contains
|
|
Variable Information.
|
|
|
|
@retval EFI_SUCCESS - Found match variable
|
|
@retval EFI_NOT_FOUND - Variable not found
|
|
|
|
**/
|
|
EFI_STATUS
|
|
CompareWithValidVariable (
|
|
IN VARIABLE_HEADER *Variable,
|
|
IN CONST CHAR16 *VariableName,
|
|
IN CONST EFI_GUID *VendorGuid,
|
|
OUT VARIABLE_POINTER_TRACK *PtrTrack
|
|
)
|
|
|
|
{
|
|
VOID *Point;
|
|
|
|
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])
|
|
) {
|
|
ASSERT (NameSizeOfVariable (Variable) != 0);
|
|
Point = (VOID *) GetVariableNamePtr (Variable);
|
|
if (!CompareMem (VariableName, Point, NameSizeOfVariable (Variable))) {
|
|
PtrTrack->CurrPtr = Variable;
|
|
return EFI_SUCCESS;
|
|
}
|
|
}
|
|
}
|
|
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
/**
|
|
This code finds variable in storage blocks (Non-Volatile)
|
|
|
|
@param PeiServices - General purpose services available to every PEIM.
|
|
@param VariableName - Name of the variable to be found
|
|
@param VendorGuid - Vendor GUID to be found.
|
|
@param PtrTrack - Variable Track Pointer structure that contains
|
|
Variable Information.
|
|
|
|
@retval EFI_SUCCESS - Variable found successfully
|
|
@retval EFI_NOT_FOUND - Variable not found
|
|
@retval EFI_INVALID_PARAMETER - Invalid variable name
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
FindVariable (
|
|
IN EFI_PEI_SERVICES **PeiServices,
|
|
IN CONST CHAR16 *VariableName,
|
|
IN CONST EFI_GUID *VendorGuid,
|
|
OUT VARIABLE_POINTER_TRACK *PtrTrack
|
|
)
|
|
|
|
{
|
|
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] != 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 = GetStartPointer (VariableStoreHeader);
|
|
IndexTable->EndPtr = GetEndPointer (VariableStoreHeader);
|
|
|
|
//
|
|
// 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;
|
|
}
|
|
|
|
/**
|
|
Provide the read variable functionality of the variable services.
|
|
|
|
@param PeiServices - General purpose services available to every PEIM.
|
|
|
|
@param VariableName - The variable name
|
|
|
|
@param VendorGuid - The vendor's GUID
|
|
|
|
@param Attributes - Pointer to the attribute
|
|
|
|
@param DataSize - Size of data
|
|
|
|
@param Data - Pointer to data
|
|
|
|
@retval EFI_SUCCESS - The interface could be successfully installed
|
|
|
|
@retval EFI_NOT_FOUND - The variable could not be discovered
|
|
|
|
@retval EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough
|
|
|
|
**/
|
|
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
|
|
)
|
|
|
|
{
|
|
VARIABLE_POINTER_TRACK Variable;
|
|
UINTN VarDataSize;
|
|
EFI_STATUS Status;
|
|
|
|
if (VariableName == NULL || VendorGuid == NULL || DataSize == 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 = DataSizeOfVariable (Variable.CurrPtr);
|
|
if (*DataSize >= VarDataSize) {
|
|
//
|
|
// PO-TKW: Address one checking in this place
|
|
//
|
|
if (Data == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
(*PeiServices)->CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);
|
|
|
|
if (Attributes != NULL) {
|
|
*Attributes = Variable.CurrPtr->Attributes;
|
|
}
|
|
|
|
*DataSize = VarDataSize;
|
|
return EFI_SUCCESS;
|
|
} else {
|
|
*DataSize = VarDataSize;
|
|
return EFI_BUFFER_TOO_SMALL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
Provide the read variable functionality of the variable services.
|
|
|
|
@param PeiServices - General purpose services available to every PEIM.
|
|
|
|
@param VariableName - The variable name
|
|
|
|
@param VendorGuid - The vendor's GUID
|
|
|
|
@param Attributes - Pointer to the attribute
|
|
|
|
@param DataSize - Size of data
|
|
|
|
@param Data - Pointer to data
|
|
|
|
@retval EFI_SUCCESS - The interface could be successfully installed
|
|
|
|
@retval EFI_NOT_FOUND - The variable could not be discovered
|
|
|
|
@retval EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PeiGetVariable2 (
|
|
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
|
|
IN CONST CHAR16 *VariableName,
|
|
IN CONST EFI_GUID *VariableGuid,
|
|
OUT UINT32 *Attributes,
|
|
IN OUT UINTN *DataSize,
|
|
OUT VOID *Data
|
|
)
|
|
|
|
{
|
|
return PeiGetVariable (
|
|
(EFI_PEI_SERVICES **) GetPeiServicesTablePointer (),
|
|
(CHAR16*)VariableName,
|
|
(EFI_GUID*)VariableGuid,
|
|
Attributes,
|
|
DataSize,
|
|
Data
|
|
);
|
|
}
|
|
|
|
/**
|
|
Provide the get next variable functionality of the variable services.
|
|
|
|
@param PeiServices - General purpose services available to every PEIM.
|
|
@param VariabvleNameSize - The variable name's size.
|
|
@param VariableName - A pointer to the variable's name.
|
|
@param VendorGuid - A pointer to the EFI_GUID structure.
|
|
|
|
@param VariableNameSize - Size of the variable name
|
|
|
|
@param VariableName - The variable name
|
|
|
|
@param VendorGuid - The vendor's GUID
|
|
|
|
@retval EFI_SUCCESS - The interface could be successfully installed
|
|
|
|
@retval EFI_NOT_FOUND - The variable could not be discovered
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PeiGetNextVariableName (
|
|
IN EFI_PEI_SERVICES **PeiServices,
|
|
IN OUT UINTN *VariableNameSize,
|
|
IN OUT CHAR16 *VariableName,
|
|
IN OUT EFI_GUID *VendorGuid
|
|
)
|
|
|
|
{
|
|
VARIABLE_POINTER_TRACK Variable;
|
|
UINTN VarNameSize;
|
|
EFI_STATUS Status;
|
|
|
|
if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == 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) {
|
|
ASSERT (NameSizeOfVariable (Variable.CurrPtr) != 0);
|
|
|
|
VarNameSize = (UINTN) NameSizeOfVariable (Variable.CurrPtr);
|
|
if (VarNameSize <= *VariableNameSize) {
|
|
(*PeiServices)->CopyMem (VariableName, GetVariableNamePtr (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;
|
|
}
|
|
|
|
/**
|
|
Provide the get next variable functionality of the variable services.
|
|
|
|
@param PeiServices - General purpose services available to every PEIM.
|
|
@param VariabvleNameSize - The variable name's size.
|
|
@param VariableName - A pointer to the variable's name.
|
|
@param VariableGuid - A pointer to the EFI_GUID structure.
|
|
|
|
@param VariableNameSize - Size of the variable name
|
|
|
|
@param VariableName - The variable name
|
|
|
|
@param VendorGuid - The vendor's GUID
|
|
|
|
|
|
@retval EFI_SUCCESS - The interface could be successfully installed
|
|
|
|
@retval EFI_NOT_FOUND - The variable could not be discovered
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PeiGetNextVariableName2 (
|
|
IN CONST EFI_PEI_READ_ONLY_VARIABLE2_PPI *This,
|
|
IN OUT UINTN *VariableNameSize,
|
|
IN OUT CHAR16 *VariableName,
|
|
IN OUT EFI_GUID *VariableGuid
|
|
)
|
|
|
|
{
|
|
return PeiGetNextVariableName (
|
|
(EFI_PEI_SERVICES **) GetPeiServicesTablePointer (),
|
|
VariableNameSize,
|
|
VariableName,
|
|
VariableGuid
|
|
);
|
|
}
|
|
|