Add in EmuVariableRuntimeDxe
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3123 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qwang12
849
MdeModulePkg/Universal/EmuVariableRuntimeDxe/EmuVariable.c
Normal file
849
MdeModulePkg/Universal/EmuVariableRuntimeDxe/EmuVariable.c
Normal file
@@ -0,0 +1,849 @@
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/*++
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Copyright (c) 2006 - 2007, Intel Corporation
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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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EmuVariable.c
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Abstract:
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Revision History
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--*/
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#include "Variable.h"
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//
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// Don't use module globals after the SetVirtualAddress map is signaled
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//
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ESAL_VARIABLE_GLOBAL *mVariableModuleGlobal;
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//
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// This is a temperary function which will be removed
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// when EfiAcquireLock in UefiLib can handle the
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// the call in UEFI Runtimer driver in RT phase.
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//
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STATIC
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VOID
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AcquireLockOnlyAtBootTime (
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IN EFI_LOCK *Lock
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)
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{
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if (!EfiAtRuntime ()) {
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EfiAcquireLock (Lock);
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}
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}
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//
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// This is a temperary function which will be removed
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// when EfiAcquireLock in UefiLib can handle the
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// the call in UEFI Runtimer driver in RT phase.
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//
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STATIC
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VOID
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ReleaseLockOnlyAtBootTime (
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IN EFI_LOCK *Lock
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)
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{
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if (!EfiAtRuntime ()) {
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EfiReleaseLock (Lock);
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}
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}
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STATIC
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UINT8 *
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EFIAPI
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GetVariableDataPtr (
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IN VARIABLE_HEADER *Variable
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)
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/*++
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Routine Description:
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This code gets the pointer to the variable data.
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Arguments:
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Variable Pointer to the Variable Header.
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Returns:
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UINT8* Pointer to Variable Data
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--*/
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{
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if (Variable->StartId != VARIABLE_DATA) {
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return NULL;
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}
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//
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// Be careful about pad size for alignment
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//
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return (UINT8 *) ((UINTN) GET_VARIABLE_NAME_PTR (Variable) + Variable->NameSize + GET_PAD_SIZE (Variable->NameSize));
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}
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STATIC
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VARIABLE_HEADER *
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EFIAPI
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GetNextVariablePtr (
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IN VARIABLE_HEADER *Variable
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)
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/*++
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Routine Description:
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This code gets the pointer to the next variable header.
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Arguments:
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Variable Pointer to the Variable Header.
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Returns:
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VARIABLE_HEADER* Pointer to next variable header.
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--*/
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{
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VARIABLE_HEADER *VarHeader;
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if (Variable->StartId != VARIABLE_DATA) {
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return NULL;
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}
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//
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// Be careful about pad size for alignment
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//
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VarHeader = (VARIABLE_HEADER *) (GetVariableDataPtr (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize));
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if (VarHeader->StartId != VARIABLE_DATA ||
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(sizeof (VARIABLE_HEADER) + VarHeader->DataSize + VarHeader->NameSize) > MAX_VARIABLE_SIZE
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) {
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return NULL;
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}
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return VarHeader;
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}
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STATIC
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VARIABLE_HEADER *
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EFIAPI
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GetEndPointer (
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IN VARIABLE_STORE_HEADER *VolHeader
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)
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/*++
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Routine Description:
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This code gets the pointer to the last variable memory pointer byte
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Arguments:
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Variable Pointer to the Variable Header.
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Returns:
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VARIABLE_HEADER* Pointer to last unavailable Variable Header
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--*/
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{
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//
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// The end of variable store
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//
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return (VARIABLE_HEADER *) ((UINTN) VolHeader + VolHeader->Size);
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}
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STATIC
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EFI_STATUS
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EFIAPI
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FindVariable (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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OUT VARIABLE_POINTER_TRACK *PtrTrack,
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IN VARIABLE_GLOBAL *Global
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)
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/*++
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Routine Description:
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This code finds variable in storage blocks (Volatile or Non-Volatile)
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Arguments:
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VariableName Name of the variable to be found
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VendorGuid Vendor GUID to be found.
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PtrTrack Variable Track Pointer structure that contains
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Variable Information.
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Contains the pointer of Variable header.
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Global VARIABLE_GLOBAL pointer
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Returns:
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EFI STATUS
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--*/
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{
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VARIABLE_HEADER *Variable[2];
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VARIABLE_STORE_HEADER *VariableStoreHeader[2];
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UINTN Index;
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//
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// We aquire the lock at the entry of FindVariable as GetVariable, GetNextVariableName
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// SetVariable all call FindVariable at entry point. Please move "Aquire Lock" to
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// the correct places if this assumption does not hold TRUE anymore.
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//
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AcquireLockOnlyAtBootTime(&Global->VariableServicesLock);
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//
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// 0: Non-Volatile, 1: Volatile
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//
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VariableStoreHeader[0] = (VARIABLE_STORE_HEADER *) ((UINTN) Global->NonVolatileVariableBase);
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VariableStoreHeader[1] = (VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase);
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//
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// Start Pointers for the variable.
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// Actual Data Pointer where data can be written.
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//
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Variable[0] = (VARIABLE_HEADER *) (VariableStoreHeader[0] + 1);
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Variable[1] = (VARIABLE_HEADER *) (VariableStoreHeader[1] + 1);
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if (VariableName[0] != 0 && VendorGuid == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Find the variable by walk through non-volatile and volatile variable store
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//
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for (Index = 0; Index < 2; Index++) {
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PtrTrack->StartPtr = (VARIABLE_HEADER *) (VariableStoreHeader[Index] + 1);
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PtrTrack->EndPtr = GetEndPointer (VariableStoreHeader[Index]);
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while ((Variable[Index] != NULL) && (Variable[Index] <= GetEndPointer (VariableStoreHeader[Index]))) {
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if (Variable[Index]->StartId == VARIABLE_DATA && Variable[Index]->State == VAR_ADDED) {
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||||
if (!(EfiAtRuntime () && !(Variable[Index]->Attributes & EFI_VARIABLE_RUNTIME_ACCESS))) {
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||||
if (VariableName[0] == 0) {
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PtrTrack->CurrPtr = Variable[Index];
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PtrTrack->Volatile = (BOOLEAN) Index;
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||||
return EFI_SUCCESS;
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} else {
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if (CompareGuid (VendorGuid, &Variable[Index]->VendorGuid)) {
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if (!CompareMem (VariableName, GET_VARIABLE_NAME_PTR (Variable[Index]), Variable[Index]->NameSize)) {
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PtrTrack->CurrPtr = Variable[Index];
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PtrTrack->Volatile = (BOOLEAN) Index;
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return EFI_SUCCESS;
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}
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}
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}
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}
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}
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Variable[Index] = GetNextVariablePtr (Variable[Index]);
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}
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}
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PtrTrack->CurrPtr = NULL;
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return EFI_NOT_FOUND;
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}
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EFI_STATUS
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EFIAPI
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GetVariable (
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IN CHAR16 *VariableName,
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IN EFI_GUID * VendorGuid,
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OUT UINT32 *Attributes OPTIONAL,
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IN OUT UINTN *DataSize,
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OUT VOID *Data,
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IN VARIABLE_GLOBAL * Global,
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IN UINT32 Instance
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)
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/*++
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Routine Description:
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||||
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This code finds variable in storage blocks (Volatile or Non-Volatile)
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Arguments:
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VariableName Name of Variable to be found
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VendorGuid Variable vendor GUID
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Attributes OPTIONAL Attribute value of the variable found
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DataSize Size of Data found. If size is less than the
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data, this value contains the required size.
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Data Data pointer
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Global Pointer to VARIABLE_GLOBAL structure
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Instance Instance of the Firmware Volume.
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Returns:
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EFI STATUS
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||||
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--*/
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{
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VARIABLE_POINTER_TRACK Variable;
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UINTN VarDataSize;
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EFI_STATUS Status;
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||||
|
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if (VariableName == NULL || VendorGuid == NULL || DataSize == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Find existing variable
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//
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Status = FindVariable (VariableName, VendorGuid, &Variable, Global);
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if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {
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goto Done;
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}
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//
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||||
// Get data size
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||||
//
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||||
VarDataSize = Variable.CurrPtr->DataSize;
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if (*DataSize >= VarDataSize) {
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if (Data == NULL) {
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Status = EFI_INVALID_PARAMETER;
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goto Done;
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}
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CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);
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||||
if (Attributes != NULL) {
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||||
*Attributes = Variable.CurrPtr->Attributes;
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}
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||||
*DataSize = VarDataSize;
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Status = EFI_SUCCESS;
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||||
goto Done;
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||||
} else {
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||||
*DataSize = VarDataSize;
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||||
Status = EFI_BUFFER_TOO_SMALL;
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||||
goto Done;
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||||
}
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||||
|
||||
Done:
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||||
ReleaseLockOnlyAtBootTime (&Global->VariableServicesLock);
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||||
return Status;
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||||
}
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
GetNextVariableName (
|
||||
IN OUT UINTN *VariableNameSize,
|
||||
IN OUT CHAR16 *VariableName,
|
||||
IN OUT EFI_GUID *VendorGuid,
|
||||
IN VARIABLE_GLOBAL *Global,
|
||||
IN UINT32 Instance
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
This code Finds the Next available variable
|
||||
|
||||
Arguments:
|
||||
|
||||
VariableNameSize Size of the variable
|
||||
VariableName Pointer to variable name
|
||||
VendorGuid Variable Vendor Guid
|
||||
Global VARIABLE_GLOBAL structure pointer.
|
||||
Instance FV instance
|
||||
|
||||
Returns:
|
||||
|
||||
EFI STATUS
|
||||
|
||||
--*/
|
||||
{
|
||||
VARIABLE_POINTER_TRACK Variable;
|
||||
UINTN VarNameSize;
|
||||
EFI_STATUS Status;
|
||||
|
||||
if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
Status = FindVariable (VariableName, VendorGuid, &Variable, Global);
|
||||
|
||||
if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {
|
||||
goto Done;
|
||||
}
|
||||
|
||||
while (TRUE) {
|
||||
if (VariableName[0] != 0) {
|
||||
//
|
||||
// If variable name is not NULL, get next variable
|
||||
//
|
||||
Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);
|
||||
}
|
||||
//
|
||||
// If both volatile and non-volatile variable store are parsed,
|
||||
// return not found
|
||||
//
|
||||
if (Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL) {
|
||||
Variable.Volatile = (BOOLEAN) (Variable.Volatile ^ ((BOOLEAN) 0x1));
|
||||
if (Variable.Volatile) {
|
||||
Variable.StartPtr = (VARIABLE_HEADER *) ((UINTN) (Global->VolatileVariableBase + sizeof (VARIABLE_STORE_HEADER)));
|
||||
Variable.EndPtr = (VARIABLE_HEADER *) GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase));
|
||||
} else {
|
||||
Status = EFI_NOT_FOUND;
|
||||
goto Done;
|
||||
}
|
||||
|
||||
Variable.CurrPtr = Variable.StartPtr;
|
||||
if (Variable.CurrPtr->StartId != VARIABLE_DATA) {
|
||||
continue;
|
||||
}
|
||||
}
|
||||
//
|
||||
// Variable is found
|
||||
//
|
||||
if (Variable.CurrPtr->StartId == VARIABLE_DATA && Variable.CurrPtr->State == VAR_ADDED) {
|
||||
if (!(EfiAtRuntime () && !(Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS))) {
|
||||
VarNameSize = Variable.CurrPtr->NameSize;
|
||||
if (VarNameSize <= *VariableNameSize) {
|
||||
CopyMem (
|
||||
VariableName,
|
||||
GET_VARIABLE_NAME_PTR (Variable.CurrPtr),
|
||||
VarNameSize
|
||||
);
|
||||
CopyMem (
|
||||
VendorGuid,
|
||||
&Variable.CurrPtr->VendorGuid,
|
||||
sizeof (EFI_GUID)
|
||||
);
|
||||
Status = EFI_SUCCESS;
|
||||
} else {
|
||||
Status = EFI_BUFFER_TOO_SMALL;
|
||||
}
|
||||
|
||||
*VariableNameSize = VarNameSize;
|
||||
goto Done;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Done:
|
||||
ReleaseLockOnlyAtBootTime (&Global->VariableServicesLock);
|
||||
return Status;
|
||||
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
SetVariable (
|
||||
IN CHAR16 *VariableName,
|
||||
IN EFI_GUID *VendorGuid,
|
||||
IN UINT32 Attributes,
|
||||
IN UINTN DataSize,
|
||||
IN VOID *Data,
|
||||
IN VARIABLE_GLOBAL *Global,
|
||||
IN UINTN *VolatileOffset,
|
||||
IN UINTN *NonVolatileOffset,
|
||||
IN UINT32 Instance
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
This code sets variable in storage blocks (Volatile or Non-Volatile)
|
||||
|
||||
Arguments:
|
||||
|
||||
VariableName Name of Variable to be found
|
||||
VendorGuid Variable vendor GUID
|
||||
Attributes Attribute value of the variable found
|
||||
DataSize Size of Data found. If size is less than the
|
||||
data, this value contains the required size.
|
||||
Data Data pointer
|
||||
Global Pointer to VARIABLE_GLOBAL structure
|
||||
VolatileOffset The offset of last volatile variable
|
||||
NonVolatileOffset The offset of last non-volatile variable
|
||||
Instance Instance of the Firmware Volume.
|
||||
|
||||
Returns:
|
||||
|
||||
EFI STATUS
|
||||
|
||||
--*/
|
||||
{
|
||||
VARIABLE_POINTER_TRACK Variable;
|
||||
EFI_STATUS Status;
|
||||
VARIABLE_HEADER *NextVariable;
|
||||
UINTN VarNameSize;
|
||||
UINTN VarNameOffset;
|
||||
UINTN VarDataOffset;
|
||||
UINTN VarSize;
|
||||
|
||||
if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
Status = FindVariable (VariableName, VendorGuid, &Variable, Global);
|
||||
|
||||
if (Status == EFI_INVALID_PARAMETER) {
|
||||
goto Done;
|
||||
} else if (!EFI_ERROR (Status) && Variable.Volatile && EfiAtRuntime()) {
|
||||
//
|
||||
// If EfiAtRuntime and the variable is Volatile and Runtime Access,
|
||||
// the volatile is ReadOnly, and SetVariable should be aborted and
|
||||
// return EFI_WRITE_PROTECTED.
|
||||
//
|
||||
Status = EFI_WRITE_PROTECTED;
|
||||
goto Done;
|
||||
} else if (sizeof (VARIABLE_HEADER) + (StrSize (VariableName) + DataSize) > MAX_VARIABLE_SIZE) {
|
||||
//
|
||||
// The size of the VariableName, including the Unicode Null in bytes plus
|
||||
// the DataSize is limited to maximum size of MAX_VARIABLE_SIZE (1024) bytes.
|
||||
//
|
||||
Status = EFI_INVALID_PARAMETER;
|
||||
goto Done;
|
||||
} else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS
|
||||
) {
|
||||
//
|
||||
// Make sure if runtime bit is set, boot service bit is set also
|
||||
//
|
||||
Status = EFI_INVALID_PARAMETER;
|
||||
goto Done;
|
||||
} else if (EfiAtRuntime () && Attributes && !(Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {
|
||||
//
|
||||
// Runtime but Attribute is not Runtime
|
||||
//
|
||||
Status = EFI_INVALID_PARAMETER;
|
||||
goto Done;
|
||||
} else if (EfiAtRuntime () && Attributes && !(Attributes & EFI_VARIABLE_NON_VOLATILE)) {
|
||||
//
|
||||
// Cannot set volatile variable in Runtime
|
||||
//
|
||||
Status = EFI_INVALID_PARAMETER;
|
||||
goto Done;
|
||||
} else if (DataSize == 0 || (Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == 0) {
|
||||
//
|
||||
// Setting a data variable with no access, or zero DataSize attributes
|
||||
// specified causes it to be deleted.
|
||||
//
|
||||
if (!EFI_ERROR (Status)) {
|
||||
Variable.CurrPtr->State &= VAR_DELETED;
|
||||
Status = EFI_SUCCESS;
|
||||
goto Done;
|
||||
}
|
||||
|
||||
Status = EFI_NOT_FOUND;
|
||||
goto Done;
|
||||
} else {
|
||||
if (!EFI_ERROR (Status)) {
|
||||
//
|
||||
// If the variable is marked valid and the same data has been passed in
|
||||
// then return to the caller immediately.
|
||||
//
|
||||
if (Variable.CurrPtr->DataSize == DataSize &&
|
||||
!CompareMem (Data, GetVariableDataPtr (Variable.CurrPtr), DataSize)
|
||||
) {
|
||||
Status = EFI_SUCCESS;
|
||||
goto Done;
|
||||
} else if (Variable.CurrPtr->State == VAR_ADDED) {
|
||||
//
|
||||
// Mark the old variable as in delete transition
|
||||
//
|
||||
Variable.CurrPtr->State &= VAR_IN_DELETED_TRANSITION;
|
||||
}
|
||||
}
|
||||
//
|
||||
// Create a new variable and copy the data.
|
||||
//
|
||||
VarNameOffset = sizeof (VARIABLE_HEADER);
|
||||
VarNameSize = StrSize (VariableName);
|
||||
VarDataOffset = VarNameOffset + VarNameSize + GET_PAD_SIZE (VarNameSize);
|
||||
VarSize = VarDataOffset + DataSize + GET_PAD_SIZE (DataSize);
|
||||
|
||||
if (Attributes & EFI_VARIABLE_NON_VOLATILE) {
|
||||
if ((UINT32) (VarSize +*NonVolatileOffset) >
|
||||
((VARIABLE_STORE_HEADER *) ((UINTN) (Global->NonVolatileVariableBase)))->Size
|
||||
) {
|
||||
Status = EFI_OUT_OF_RESOURCES;
|
||||
goto Done;
|
||||
}
|
||||
|
||||
NextVariable = (VARIABLE_HEADER *) (UINT8 *) (*NonVolatileOffset + (UINTN) Global->NonVolatileVariableBase);
|
||||
*NonVolatileOffset = *NonVolatileOffset + VarSize;
|
||||
} else {
|
||||
if (EfiAtRuntime ()) {
|
||||
Status = EFI_INVALID_PARAMETER;
|
||||
goto Done;
|
||||
}
|
||||
|
||||
if ((UINT32) (VarSize +*VolatileOffset) >
|
||||
((VARIABLE_STORE_HEADER *) ((UINTN) (Global->VolatileVariableBase)))->Size
|
||||
) {
|
||||
Status = EFI_OUT_OF_RESOURCES;
|
||||
goto Done;
|
||||
}
|
||||
|
||||
NextVariable = (VARIABLE_HEADER *) (UINT8 *) (*VolatileOffset + (UINTN) Global->VolatileVariableBase);
|
||||
*VolatileOffset = *VolatileOffset + VarSize;
|
||||
}
|
||||
|
||||
NextVariable->StartId = VARIABLE_DATA;
|
||||
NextVariable->Attributes = Attributes;
|
||||
NextVariable->State = VAR_ADDED;
|
||||
NextVariable->Reserved = 0;
|
||||
|
||||
//
|
||||
// There will be pad bytes after Data, the NextVariable->NameSize and
|
||||
// NextVariable->NameSize should not include pad size so that variable
|
||||
// service can get actual size in GetVariable
|
||||
//
|
||||
NextVariable->NameSize = (UINT32)VarNameSize;
|
||||
NextVariable->DataSize = (UINT32)DataSize;
|
||||
|
||||
CopyMem (&NextVariable->VendorGuid, VendorGuid, sizeof (EFI_GUID));
|
||||
CopyMem (
|
||||
(UINT8 *) ((UINTN) NextVariable + VarNameOffset),
|
||||
VariableName,
|
||||
VarNameSize
|
||||
);
|
||||
CopyMem (
|
||||
(UINT8 *) ((UINTN) NextVariable + VarDataOffset),
|
||||
Data,
|
||||
DataSize
|
||||
);
|
||||
|
||||
//
|
||||
// Mark the old variable as deleted
|
||||
//
|
||||
if (!EFI_ERROR (Status)) {
|
||||
Variable.CurrPtr->State &= VAR_DELETED;
|
||||
}
|
||||
}
|
||||
|
||||
Status = EFI_SUCCESS;
|
||||
Done:
|
||||
ReleaseLockOnlyAtBootTime (&Global->VariableServicesLock);
|
||||
return Status;
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
QueryVariableInfo (
|
||||
IN UINT32 Attributes,
|
||||
OUT UINT64 *MaximumVariableStorageSize,
|
||||
OUT UINT64 *RemainingVariableStorageSize,
|
||||
OUT UINT64 *MaximumVariableSize,
|
||||
IN VARIABLE_GLOBAL *Global,
|
||||
IN UINT32 Instance
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
|
||||
This code returns information about the EFI variables.
|
||||
|
||||
Arguments:
|
||||
|
||||
Attributes Attributes bitmask to specify the type of variables
|
||||
on which to return information.
|
||||
MaximumVariableStorageSize Pointer to the maximum size of the storage space available
|
||||
for the EFI variables associated with the attributes specified.
|
||||
RemainingVariableStorageSize Pointer to the remaining size of the storage space available
|
||||
for the EFI variables associated with the attributes specified.
|
||||
MaximumVariableSize Pointer to the maximum size of the individual EFI variables
|
||||
associated with the attributes specified.
|
||||
Global Pointer to VARIABLE_GLOBAL structure.
|
||||
Instance Instance of the Firmware Volume.
|
||||
|
||||
Returns:
|
||||
|
||||
EFI STATUS
|
||||
EFI_INVALID_PARAMETER - An invalid combination of attribute bits was supplied.
|
||||
EFI_SUCCESS - Query successfully.
|
||||
EFI_UNSUPPORTED - The attribute is not supported on this platform.
|
||||
|
||||
--*/
|
||||
{
|
||||
VARIABLE_HEADER *Variable;
|
||||
VARIABLE_HEADER *NextVariable;
|
||||
UINT64 VariableSize;
|
||||
VARIABLE_STORE_HEADER *VariableStoreHeader;
|
||||
|
||||
if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS)) == 0) {
|
||||
//
|
||||
// Make sure the Attributes combination is supported by the platform.
|
||||
//
|
||||
return EFI_UNSUPPORTED;
|
||||
} else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {
|
||||
//
|
||||
// Make sure if runtime bit is set, boot service bit is set also.
|
||||
//
|
||||
return EFI_INVALID_PARAMETER;
|
||||
} else if (EfiAtRuntime () && !(Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {
|
||||
//
|
||||
// Make sure RT Attribute is set if we are in Runtime phase.
|
||||
//
|
||||
return EFI_INVALID_PARAMETER;
|
||||
} else if (EfiAtRuntime () && Attributes && !(Attributes & EFI_VARIABLE_NON_VOLATILE)) {
|
||||
//
|
||||
// Cannot Query volatile variable in Runtime
|
||||
//
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
AcquireLockOnlyAtBootTime(&Global->VariableServicesLock);
|
||||
|
||||
if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {
|
||||
//
|
||||
// Query is Volatile related.
|
||||
//
|
||||
VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase);
|
||||
} else {
|
||||
//
|
||||
// Query is Non-Volatile related.
|
||||
//
|
||||
VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) Global->NonVolatileVariableBase);
|
||||
}
|
||||
|
||||
//
|
||||
// Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize
|
||||
// with the storage size (excluding the storage header size)
|
||||
//
|
||||
*MaximumVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);
|
||||
*RemainingVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);
|
||||
|
||||
//
|
||||
// Let *MaximumVariableSize be MAX_VARIABLE_SIZE
|
||||
//
|
||||
*MaximumVariableSize = MAX_VARIABLE_SIZE;
|
||||
|
||||
//
|
||||
// Point to the starting address of the variables.
|
||||
//
|
||||
Variable = (VARIABLE_HEADER *) (VariableStoreHeader + 1);
|
||||
|
||||
//
|
||||
// Now walk through the related variable store.
|
||||
//
|
||||
while (Variable < GetEndPointer (VariableStoreHeader)) {
|
||||
if (Variable->StartId != VARIABLE_DATA) {
|
||||
break;
|
||||
}
|
||||
|
||||
NextVariable = (VARIABLE_HEADER *) (GetVariableDataPtr (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize));
|
||||
VariableSize = (UINT64) (UINTN) NextVariable - (UINT64) (UINTN) Variable;
|
||||
|
||||
if (Variable->State == VAR_ADDED) {
|
||||
*RemainingVariableStorageSize -= VariableSize;
|
||||
}
|
||||
|
||||
//
|
||||
// Go to the next one.
|
||||
//
|
||||
Variable = NextVariable;
|
||||
}
|
||||
|
||||
ReleaseLockOnlyAtBootTime (&Global->VariableServicesLock);
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
STATIC
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
InitializeVariableStore (
|
||||
OUT EFI_PHYSICAL_ADDRESS *VariableBase,
|
||||
OUT UINTN *LastVariableOffset
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
This function initializes variable store
|
||||
|
||||
Arguments:
|
||||
|
||||
Returns:
|
||||
|
||||
--*/
|
||||
{
|
||||
VARIABLE_STORE_HEADER *VariableStore;
|
||||
|
||||
//
|
||||
// Allocate memory for volatile variable store
|
||||
//
|
||||
VariableStore = (VARIABLE_STORE_HEADER *) AllocateRuntimePool (
|
||||
VARIABLE_STORE_SIZE
|
||||
);
|
||||
if (NULL == VariableStore) {
|
||||
return EFI_OUT_OF_RESOURCES;
|
||||
}
|
||||
|
||||
SetMem (VariableStore, VARIABLE_STORE_SIZE, 0xff);
|
||||
|
||||
//
|
||||
// Variable Specific Data
|
||||
//
|
||||
*VariableBase = (EFI_PHYSICAL_ADDRESS) (UINTN) VariableStore;
|
||||
*LastVariableOffset = sizeof (VARIABLE_STORE_HEADER);
|
||||
|
||||
VariableStore->Signature = VARIABLE_STORE_SIGNATURE;
|
||||
VariableStore->Size = VARIABLE_STORE_SIZE;
|
||||
VariableStore->Format = VARIABLE_STORE_FORMATTED;
|
||||
VariableStore->State = VARIABLE_STORE_HEALTHY;
|
||||
VariableStore->Reserved = 0;
|
||||
VariableStore->Reserved1 = 0;
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
VariableCommonInitialize (
|
||||
IN EFI_HANDLE ImageHandle,
|
||||
IN EFI_SYSTEM_TABLE *SystemTable
|
||||
)
|
||||
/*++
|
||||
|
||||
Routine Description:
|
||||
This function does common initialization for variable services
|
||||
|
||||
Arguments:
|
||||
|
||||
Returns:
|
||||
|
||||
--*/
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
|
||||
//
|
||||
// Allocate memory for mVariableModuleGlobal
|
||||
//
|
||||
mVariableModuleGlobal = (ESAL_VARIABLE_GLOBAL *) AllocateRuntimePool (
|
||||
sizeof (ESAL_VARIABLE_GLOBAL)
|
||||
);
|
||||
if (NULL == mVariableModuleGlobal) {
|
||||
return EFI_OUT_OF_RESOURCES;
|
||||
}
|
||||
|
||||
EfiInitializeLock(&mVariableModuleGlobal->VariableGlobal[Physical].VariableServicesLock, TPL_NOTIFY);
|
||||
|
||||
//
|
||||
// Intialize volatile variable store
|
||||
//
|
||||
Status = InitializeVariableStore (
|
||||
&mVariableModuleGlobal->VariableGlobal[Physical].VolatileVariableBase,
|
||||
&mVariableModuleGlobal->VolatileLastVariableOffset
|
||||
);
|
||||
|
||||
if (EFI_ERROR (Status)) {
|
||||
return Status;
|
||||
}
|
||||
//
|
||||
// Intialize non volatile variable store
|
||||
//
|
||||
Status = InitializeVariableStore (
|
||||
&mVariableModuleGlobal->VariableGlobal[Physical].NonVolatileVariableBase,
|
||||
&mVariableModuleGlobal->NonVolatileLastVariableOffset
|
||||
);
|
||||
|
||||
return Status;
|
||||
}
|
||||
Reference in New Issue
Block a user