diff --git a/distrib/sets/lists/comp/mi b/distrib/sets/lists/comp/mi
index d340ca3c3228..371e7f611cff 100644
--- a/distrib/sets/lists/comp/mi
+++ b/distrib/sets/lists/comp/mi
@@ -1,4 +1,4 @@
-#	$NetBSD: mi,v 1.1007 2007/02/20 16:56:08 kiyohara Exp $
+#	$NetBSD: mi,v 1.1008 2007/02/21 21:13:01 mrg Exp $
 ./etc/mtree/set.comp				comp-sys-root
 ./usr/bin/addr2line				comp-debug-bin		bfd
 ./usr/bin/ar					comp-util-bin		bfd
@@ -6570,6 +6570,8 @@
 ./usr/share/man/cat9/bus_dmamem_map.0		comp-sys-catman		.cat
 ./usr/share/man/cat9/bus_dmamem_mmap.0		comp-sys-catman		.cat
 ./usr/share/man/cat9/bus_dmamem_unmap.0		comp-sys-catman		.cat
+./usr/share/man/cat9/bus_dmatag_subregion.0	comp-sys-catman		.cat
+./usr/share/man/cat9/bus_dmatag_destroy.0	comp-sys-catman		.cat
 ./usr/share/man/cat9/bus_space.0		comp-sys-catman		.cat
 ./usr/share/man/cat9/bus_space_alloc.0		comp-sys-catman		.cat
 ./usr/share/man/cat9/bus_space_barrier.0	comp-sys-catman		.cat
@@ -10888,6 +10890,8 @@
 ./usr/share/man/man9/bus_dmamem_map.9		comp-sys-man		.man
 ./usr/share/man/man9/bus_dmamem_mmap.9		comp-sys-man		.man
 ./usr/share/man/man9/bus_dmamem_unmap.9		comp-sys-man		.man
+./usr/share/man/man9/bus_dmatag_subregion.9	comp-sys-man		.man
+./usr/share/man/man9/bus_dmatag_destroy.9	comp-sys-man		.man
 ./usr/share/man/man9/bus_space.9		comp-sys-man		.man
 ./usr/share/man/man9/bus_space_alloc.9		comp-sys-man		.man
 ./usr/share/man/man9/bus_space_barrier.9	comp-sys-man		.man
diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile
index 4c6feedff9f3..aee647795d7d 100644
--- a/share/man/man9/Makefile
+++ b/share/man/man9/Makefile
@@ -1,4 +1,4 @@
-#       $NetBSD: Makefile,v 1.232 2007/02/17 17:18:31 yamt Exp $
+#       $NetBSD: Makefile,v 1.233 2007/02/21 21:13:02 mrg Exp $
 
 #	Makefile for section 9 (kernel function and variable) manual pages.
 
@@ -138,7 +138,8 @@ MLINKS+=bus_dma.9 bus_dmamap_create.9 bus_dma.9 bus_dmamap_destroy.9 \
 	bus_dma.9 bus_dmamap_unload.9 bus_dma.9 bus_dmamap_sync.9 \
 	bus_dma.9 bus_dmamem_alloc.9 bus_dma.9 bus_dmamem_free.9 \
 	bus_dma.9 bus_dmamem_map.9 bus_dma.9 bus_dmamem_unmap.9 \
-	bus_dma.9 bus_dmamem_mmap.9
+	bus_dma.9 bus_dmamem_mmap.9 \
+	bus_dma.9 bus_dmatag_subregion.9 bus_dma.9 bus_dmatag_destroy.9
 MLINKS+=callout.9 callout_init.9 callout.9 callout_reset.9 \
 	callout.9 callout_schedule.9 callout.9 callout_setfunc.9 \
 	callout.9 callout_stop.9 callout.9 callout_pending.9 \
diff --git a/share/man/man9/bus_dma.9 b/share/man/man9/bus_dma.9
index 5242d6b0556d..69d73f952450 100644
--- a/share/man/man9/bus_dma.9
+++ b/share/man/man9/bus_dma.9
@@ -1,4 +1,4 @@
-.\" $NetBSD: bus_dma.9,v 1.39 2007/02/02 07:37:06 wiz Exp $
+.\" $NetBSD: bus_dma.9,v 1.40 2007/02/21 21:13:02 mrg Exp $
 .\"
 .\" Copyright (c) 1996, 1997, 1998, 2001, 2005, 2006 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -52,7 +52,9 @@
 .Nm bus_dmamem_free ,
 .Nm bus_dmamem_map ,
 .Nm bus_dmamem_unmap ,
-.Nm bus_dmamem_mmap
+.Nm bus_dmamem_mmap ,
+.Nm bus_dmatag_subregion ,
+.Nm bus_dmatag_destroy
 .Nd Bus and Machine Independent DMA Mapping Interface
 .Sh SYNOPSIS
 .In machine/bus.h
@@ -92,6 +94,11 @@
 .Ft paddr_t
 .Fn bus_dmamem_mmap "bus_dma_tag_t tag" "bus_dma_segment_t *segs" \
 "int nsegs" "off_t off" "int prot" "int flags"
+.Ft int
+.Fn bus_dmatag_subregion "bus_dma_tag_t tag" "bus_addr_t min_addr" \
+"bus_addr_t max_addr" "bus_dma_tag_t *newtag" "int flags"
+.Ft void
+.Fn bus_dmatag_destroy "bus_dma_tag_t tag"
 .Sh DESCRIPTION
 Provide a bus- and machine-independent "DMA mapping interface."
 .Sh NOTES
@@ -777,6 +784,33 @@ to
 .Pp
 Returns -1 to indicate failure.
 Otherwise, returns an opaque value to be interpreted by the device pager.
+.It Fn bus_dmatag_subregion "tag" "min_addr" "max_addr" "newtag" "flags"
+Given a bus_dma_tag_t
+create a new bus_dma_tag_t with a limited bus address space.  This function
+should not normally be used, but is useful for devices that do not support
+the full address space of the parent bus.
+The arguments are as follows:
+.Bl -tag -width max_addr -compact
+.It Fa tag
+This is the bus_dma_tag_t to subregion.
+.It Fa min_addr
+The smallest address this new tag can address.
+.It Fa max_addr .
+The largest address this new tag can address.
+.It Fa newtag
+Pointer filled in with the address of the new bus_dma_tag_t.
+.It Fa flags
+Flags are defined as follows:
+.Bl -tag -width BUS_DMA_WAITOK -compact
+.It Dv BUS_DMA_WAITOK
+It is safe to wait (sleep) for resources during this call.
+.It Dv BUS_DMA_NOWAIT
+It is not safe to wait (sleep) for resources during this call.
+.El
+.El
+.It Fn bus_dmatag_destroy "tag"
+Free a tag created by
+.Fn bus_dmatag_subregion .
 .El
 .Sh SEE ALSO
 .Xr bus_space 9 ,