diff --git a/sys/dev/eisa/eisa_if.m b/sys/dev/eisa/eisa_if.m
new file mode 100644
index 000000000000..9bf7e56bb542
--- /dev/null
+++ b/sys/dev/eisa/eisa_if.m
@@ -0,0 +1,65 @@
+#
+# Copyright (c) 2004 M. Warner Losh
+# All rights reserved.
+#
+# 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.
+#
+# $FreeBSD$
+#
+
+#include <sys/bus.h>
+#include <sys/types.h>
+
+INTERFACE eisa;
+
+#
+# Add interrupt information for an EISA device.  irq is the irq number
+# and trigger is either EISA_TRIGGER_EDGE or EISA_TRIGGER_LEVEL
+#
+METHOD int add_intr {
+	device_t	dev;
+	device_t	child;
+	int		irq;
+	int		trigger;
+};
+
+#
+# Adds an I/O space to the reservation lis
+#
+METHOD int add_iospace {
+	device_t	dev;
+	device_t	child;
+	u_long		iobase;
+	u_long		iosize;
+	int		flags;
+};
+
+#
+# Adds a memory range to the reservation lis
+#
+METHOD int add_mspace {
+	device_t	dev;
+	device_t	child;
+	u_long		mbase;
+	u_long		msize;
+	int		flags;
+};