diff --git a/sys/arm/arm/gic_if.m b/sys/arm/arm/gic_if.m
index b9bef7db1a80..ba722c3b1250 100644
--- a/sys/arm/arm/gic_if.m
+++ b/sys/arm/arm/gic_if.m
@@ -1,39 +1,69 @@
+#-
+# Copyright (c) 2021 The FreeBSD Foundation
+#
+# This software was developed by Andrew Turner under
+# sponsorship from the FreeBSD Foundation.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
 
 INTERFACE gic;
 
 HEADER {
 	struct intr_irqsrc;
 };
 
 METHOD void reserve_msi_range {
 	device_t	dev;
 	u_int		mbi_start;
 	u_int		mbi_count;
 };
 
 METHOD int alloc_msi {
 	device_t	dev;
 	u_int		mbi_start;
 	u_int		mbi_count;
 	int		count;
 	int		maxcount;
 	struct intr_irqsrc **isrc;
 };
 
 METHOD int release_msi {
 	device_t	dev;
 	int		count;
 	struct intr_irqsrc **isrc;
 };
 
 METHOD int alloc_msix {
 	device_t	dev;
 	u_int		mbi_start;
 	u_int		mbi_count;
 	struct intr_irqsrc **isrc;
 };
 
 METHOD int release_msix {
 	device_t	dev;
 	struct intr_irqsrc *isrc;
 };