diff options
Diffstat (limited to 'EdkModulePkg/Universal/Variable/Pei/Variable.c')
| -rw-r--r-- | EdkModulePkg/Universal/Variable/Pei/Variable.c | 519 |
1 files changed, 0 insertions, 519 deletions
diff --git a/EdkModulePkg/Universal/Variable/Pei/Variable.c b/EdkModulePkg/Universal/Variable/Pei/Variable.c deleted file mode 100644 index a2ea1d6584..0000000000 --- a/EdkModulePkg/Universal/Variable/Pei/Variable.c +++ /dev/null @@ -1,519 +0,0 @@ -/*++
-
-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
-
---*/
-
-#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;
-}
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