| /** @file | |
| A hook-in library for: | |
| - MdeModulePkg/Universal/Variable/Pei/VariablePei.inf | |
| - MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf | |
| - MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf | |
| Plugging this library instance into one of the above modules makes that | |
| variable service backend wait for another platform module to dynamically | |
| initialize or verify EFI_FIRMWARE_VOLUME_HEADER and VARIABLE_STORE_HEADER in | |
| the non-volatile variable store FVB device. The initialization / verification | |
| is signaled by installing gEdkiiNvVarStoreFormattedGuid into the | |
| phase-matching PPI or protocol database, with a NULL interface. (Note that | |
| installing gEdkiiNvVarStoreFormattedGuid into either the DXE or the MM | |
| protocol database will unblock VariableSmm -- refer to EFI_SECTION_MM_DEPEX | |
| in the PI spec.) | |
| Copyright (C) 2018, Red Hat, Inc. | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| #include <Base.h> | |
| RETURN_STATUS | |
| EFIAPI | |
| NvVarStoreFormattedInitialize ( | |
| VOID | |
| ) | |
| { | |
| // | |
| // Do nothing, just imbue VariablePei / VariableRuntimeDxe / VariableSmm with | |
| // a PPI or protocol dependency on EDKII_NV_VAR_STORE_FORMATTED_GUID. | |
| // | |
| return RETURN_SUCCESS; | |
| } |