1 files changed, 97 insertions, 0 deletions
diff --git a/roms/edk2/OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.c b/roms/edk2/OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.c
new file mode 100644
index 000000000..9c890013e
--- /dev/null
+++ b/roms/edk2/OvmfPkg/Library/EmuVariableFvbLib/EmuVariableFvbLib.c
@@ -0,0 +1,97 @@
+/** @file
+  OVMF platform customization for EMU Variable FVB driver
+
+  Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "PiDxe.h"
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PlatformFvbLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiRuntimeLib.h>
+
+
+/**
+  This function will be called following a call to the
+  EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL Read function.
+
+  @param[in] This     The EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
+  @param[in] Lba      The starting logical block index
+                      from which to read.
+  @param[in] Offset   Offset into the block at which to begin reading.
+  @param[in] NumBytes The number of bytes read.
+  @param[in] Buffer   Pointer to the buffer that was read, and will be
+                      returned to the caller.
+
+**/
+VOID
+EFIAPI
+PlatformFvbDataRead (
+  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
+  IN        EFI_LBA                             Lba,
+  IN        UINTN                               Offset,
+  IN        UINTN                               NumBytes,
+  IN        UINT8                               *Buffer
+  )
+{
+}
+
+
+/**
+  This function will be called following a call to the
+  EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL Write function.
+
+  @param[in] This     EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
+  @param[in] Lba      The starting logical block index to written to.
+  @param[in] Offset   Offset into the block at which to begin writing.
+  @param[in] NumBytes The number of bytes written.
+  @param[in] Buffer   Pointer to the buffer that was written.
+
+**/
+VOID
+EFIAPI
+PlatformFvbDataWritten (
+  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
+  IN        EFI_LBA                             Lba,
+  IN        UINTN                               Offset,
+  IN        UINTN                               NumBytes,
+  IN        UINT8                               *Buffer
+  )
+{
+  STATIC EFI_EVENT EventToSignal = NULL;
+
+  if (!EfiAtRuntime ()) {
+    if (EventToSignal == NULL) {
+      EventToSignal = (EFI_EVENT)(UINTN) PcdGet64 (PcdEmuVariableEvent);
+    }
+    if (EventToSignal != NULL) {
+      gBS->SignalEvent (EventToSignal);
+    }
+  }
+}
+
+
+/**
+  This function will be called following a call to the
+  EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL Erase function.
+
+  @param This   Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL
+                instance.
+  @param List   The variable argument list as documented for
+                the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL Erase
+                function.
+
+**/
+VOID
+EFIAPI
+PlatformFvbBlocksErased (
+  IN CONST  EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
+  IN  VA_LIST       List
+  )
+{
+}
+
+