1 files changed, 24 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h
index c508d8bade..ec35a7dfcf 100644
--- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h
+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h
@@ -70,4 +70,28 @@ typedef struct {
   VOID        *Data;
 } VARIABLE_CACHE_ENTRY;
 
+/**
+  Writes a buffer to variable storage space, in the working block.
+
+  This function writes a buffer to variable storage space into firmware
+  volume block device. The destination is specified by parameter
+  VariableBase. Fault Tolerant Write protocol is used for writing.
+
+  @param  VariableBase   Base address of variable to write
+  @param  Buffer         Point to the data buffer
+  @param  BufferSize     The number of bytes of the data Buffer
+
+  @retval EFI_SUCCESS    The function completed successfully
+  @retval EFI_NOT_FOUND  Fail to locate Fault Tolerant Write protocol
+  @retval EFI_ABORTED    The function could not complete successfully
+
+**/
+EFI_STATUS
+FtwVariableSpace (
+  IN EFI_PHYSICAL_ADDRESS   VariableBase,
+  IN UINT8                  *Buffer,
+  IN UINTN                  BufferSize
+  );
+
+
 #endif