diff --git a/interface/dir_interface.dox b/interface/dir_interface.dox
new file mode 100644
index 0000000..2ddef82
--- /dev/null
+++ b/interface/dir_interface.dox
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+//This file holds description for the current directory. This documentation
+//will be included in the Doxygen output.
+
+/*!
+\dir
+\brief Source code defining secure domain entry points for the non-secure
+domain.
+\details
+
+*/
\ No newline at end of file