+ Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r
+ if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r
+ goto Done;\r
+ }\r
+\r
+ //\r
+ // Get data size\r
+ //\r
+ VarDataSize = DataSizeOfVariable (Variable.CurrPtr);\r
+ ASSERT (VarDataSize != 0);\r
+\r
+ if (*DataSize >= VarDataSize) {\r
+ if (Data == NULL) {\r
+ Status = EFI_INVALID_PARAMETER;\r
+ goto Done;\r
+ }\r
+\r
+ CopyMem (Data, GetVariableDataPtr (Variable.CurrPtr), VarDataSize);\r
+ if (Attributes != NULL) {\r
+ *Attributes = Variable.CurrPtr->Attributes;\r
+ }\r
+\r
+ *DataSize = VarDataSize;\r
+ UpdateVariableInfo (VariableName, VendorGuid, Variable.Volatile, TRUE, FALSE, FALSE, FALSE);\r
+ \r
+ Status = EFI_SUCCESS;\r
+ goto Done;\r
+ } else {\r
+ *DataSize = VarDataSize;\r
+ Status = EFI_BUFFER_TOO_SMALL;\r
+ goto Done;\r
+ }\r
+\r
+Done:\r
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
+ return Status;\r
+}\r
+\r
+\r
+\r
+/**\r
+\r
+ This code Finds the Next available variable.\r
+\r
+ @param VariableNameSize Size of the variable name.\r
+ @param VariableName Pointer to variable name.\r
+ @param VendorGuid Variable Vendor Guid.\r
+\r
+ @return EFI_INVALID_PARAMETER Invalid parameter.\r
+ @return EFI_SUCCESS Find the specified variable.\r
+ @return EFI_NOT_FOUND Not found.\r
+ @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableServiceGetNextVariableName (\r
+ IN OUT UINTN *VariableNameSize,\r
+ IN OUT CHAR16 *VariableName,\r
+ IN OUT EFI_GUID *VendorGuid\r
+ )\r
+{\r
+ VARIABLE_POINTER_TRACK Variable;\r
+ UINTN VarNameSize;\r
+ EFI_STATUS Status;\r
+\r
+ if (VariableNameSize == NULL || VariableName == NULL || VendorGuid == NULL) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
+\r
+ Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);\r
+ if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {\r
+ goto Done;\r
+ }\r
+\r
+ if (VariableName[0] != 0) {\r
+ //\r
+ // If variable name is not NULL, get next variable.\r
+ //\r
+ Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r
+ }\r
+\r
+ while (TRUE) {\r
+ //\r
+ // If both volatile and non-volatile variable store are parsed,\r
+ // return not found.\r
+ //\r
+ if (Variable.CurrPtr >= Variable.EndPtr || Variable.CurrPtr == NULL) {\r
+ Variable.Volatile = (BOOLEAN) (Variable.Volatile ^ ((BOOLEAN) 0x1));\r
+ if (!Variable.Volatile) {\r
+ Variable.StartPtr = GetStartPointer ((VARIABLE_STORE_HEADER *) (UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);\r
+ Variable.EndPtr = GetEndPointer ((VARIABLE_STORE_HEADER *) ((UINTN) mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase));\r
+ } else {\r
+ Status = EFI_NOT_FOUND;\r
+ goto Done;\r
+ }\r
+\r
+ Variable.CurrPtr = Variable.StartPtr;\r
+ if (!IsValidVariableHeader (Variable.CurrPtr)) {\r
+ continue;\r
+ }\r
+ }\r
+ //\r
+ // Variable is found\r
+ //\r
+ if (IsValidVariableHeader (Variable.CurrPtr) && Variable.CurrPtr->State == VAR_ADDED) {\r
+ if ((AtRuntime () && ((Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0)) == 0) {\r
+ VarNameSize = NameSizeOfVariable (Variable.CurrPtr);\r
+ ASSERT (VarNameSize != 0);\r
+\r
+ if (VarNameSize <= *VariableNameSize) {\r
+ CopyMem (\r
+ VariableName,\r
+ GetVariableNamePtr (Variable.CurrPtr),\r
+ VarNameSize\r
+ );\r
+ CopyMem (\r
+ VendorGuid,\r
+ &Variable.CurrPtr->VendorGuid,\r
+ sizeof (EFI_GUID)\r
+ );\r
+ Status = EFI_SUCCESS;\r
+ } else {\r
+ Status = EFI_BUFFER_TOO_SMALL;\r
+ }\r
+\r
+ *VariableNameSize = VarNameSize;\r
+ goto Done;\r
+ }\r
+ }\r
+\r
+ Variable.CurrPtr = GetNextVariablePtr (Variable.CurrPtr);\r
+ }\r
+\r
+Done:\r
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);\r
+ return Status;\r
+}\r
+\r
+/**\r
+\r
+ This code sets variable in storage blocks (Volatile or Non-Volatile).\r
+\r
+ @param VariableName Name of Variable to be found.\r
+ @param VendorGuid Variable vendor GUID.\r
+ @param Attributes Attribute value of the variable found\r
+ @param DataSize Size of Data found. If size is less than the\r
+ data, this value contains the required size.\r
+ @param Data Data pointer.\r
+\r
+ @return EFI_INVALID_PARAMETER Invalid parameter.\r
+ @return EFI_SUCCESS Set successfully.\r
+ @return EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r
+ @return EFI_NOT_FOUND Not found.\r
+ @return EFI_WRITE_PROTECTED Variable is read-only.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableServiceSetVariable (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid,\r
+ IN UINT32 Attributes,\r
+ IN UINTN DataSize,\r
+ IN VOID *Data\r
+ )\r
+{\r
+ VARIABLE_POINTER_TRACK Variable;\r
+ EFI_STATUS Status;\r
+ VARIABLE_HEADER *NextVariable;\r
+ EFI_PHYSICAL_ADDRESS Point;\r
+\r
+ //\r
+ // Check input parameters.\r
+ //\r
+ if (VariableName == NULL || VariableName[0] == 0 || VendorGuid == NULL) {\r
+ return EFI_INVALID_PARAMETER;\r
+ } \r
+\r
+ if (DataSize != 0 && Data == NULL) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ //\r
+ // Not support authenticated variable write yet.\r
+ //\r
+ if ((Attributes & EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS) != 0) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ //\r
+ // Make sure if runtime bit is set, boot service bit is set also.\r
+ //\r
+ if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r