Index: head/sys/dev/iommu/iommu.h
===================================================================
--- head/sys/dev/iommu/iommu.h
+++ head/sys/dev/iommu/iommu.h
@@ -34,10 +34,7 @@
 #ifndef _DEV_IOMMU_IOMMU_H_
 #define _DEV_IOMMU_IOMMU_H_
 
-/* Host or physical memory address, after translation. */
-typedef uint64_t iommu_haddr_t;
-/* Guest or bus address, before translation. */
-typedef uint64_t iommu_gaddr_t;
+#include <dev/iommu/iommu_types.h>
 
 struct bus_dma_tag_common;
 struct iommu_map_entry;
Index: head/sys/dev/iommu/iommu_types.h
===================================================================
--- head/sys/dev/iommu/iommu_types.h
+++ head/sys/dev/iommu/iommu_types.h
@@ -0,0 +1,42 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _DEV_IOMMU_IOMMU_TYPES_H_
+#define _DEV_IOMMU_IOMMU_TYPES_H_
+
+/* Host or physical memory address, after translation. */
+typedef uint64_t iommu_haddr_t;
+/* Guest or bus address, before translation. */
+typedef uint64_t iommu_gaddr_t;
+
+#endif /* !_DEV_IOMMU_IOMMU_TYPES_H_ */