From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
 .../OvmfPkg/Library/NvVarsFileLib/NvVarsFileLib.c  | 77 ++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 roms/edk2/OvmfPkg/Library/NvVarsFileLib/NvVarsFileLib.c

(limited to 'roms/edk2/OvmfPkg/Library/NvVarsFileLib/NvVarsFileLib.c')

diff --git a/roms/edk2/OvmfPkg/Library/NvVarsFileLib/NvVarsFileLib.c b/roms/edk2/OvmfPkg/Library/NvVarsFileLib/NvVarsFileLib.c
new file mode 100644
index 000000000..65ab6a06e
--- /dev/null
+++ b/roms/edk2/OvmfPkg/Library/NvVarsFileLib/NvVarsFileLib.c
@@ -0,0 +1,77 @@
+/** @file
+  Save Non-Volatile Variables to a file system.
+
+  Copyright (c) 2009, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "NvVarsFileLib.h"
+#include <Library/DebugLib.h>
+#include <Library/NvVarsFileLib.h>
+
+EFI_HANDLE    mNvVarsFileLibFsHandle = NULL;
+
+
+/**
+  Attempts to connect the NvVarsFileLib to the specified file system.
+
+  @param[in]  FsHandle - Handle for a gEfiSimpleFileSystemProtocolGuid instance
+
+  @return     The EFI_STATUS while attempting to connect the NvVarsFileLib
+              to the file system instance.
+  @retval     EFI_SUCCESS - The given file system was connected successfully
+
+**/
+EFI_STATUS
+EFIAPI
+ConnectNvVarsToFileSystem (
+  IN EFI_HANDLE    FsHandle
+  )
+{
+  EFI_STATUS Status;
+
+  //
+  // We might fail to load the variable, since the file system initially
+  // will not have the NvVars file.
+  //
+  LoadNvVarsFromFs (FsHandle);
+
+  //
+  // We must be able to save the variables successfully to the file system
+  // to have connected successfully.
+  //
+  Status = SaveNvVarsToFs (FsHandle);
+  if (!EFI_ERROR (Status)) {
+    mNvVarsFileLibFsHandle = FsHandle;
+  }
+
+  return Status;
+}
+
+
+/**
+  Update non-volatile variables stored on the file system.
+
+  @return     The EFI_STATUS while attempting to update the variable on
+              the connected file system.
+  @retval     EFI_SUCCESS - The non-volatile variables were saved to the disk
+  @retval     EFI_NOT_STARTED - A file system has not been connected
+
+**/
+EFI_STATUS
+EFIAPI
+UpdateNvVarsOnFileSystem (
+  )
+{
+  if (mNvVarsFileLibFsHandle == NULL) {
+    //
+    // A file system had not been connected to the library.
+    //
+    return EFI_NOT_STARTED;
+  } else {
+    return SaveNvVarsToFs (mNvVarsFileLibFsHandle);
+  }
+}
+
+
-- 
cgit