diff --git a/sys/arch/xen/i386/xen_machdep.c b/sys/arch/xen/i386/xen_machdep.c
index e1c2fe61e5e0..27a7826fb6ad 100644
--- a/sys/arch/xen/i386/xen_machdep.c
+++ b/sys/arch/xen/i386/xen_machdep.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: xen_machdep.c,v 1.10 2005/06/15 22:08:08 bouyer Exp $	*/
+/*	$NetBSD: xen_machdep.c,v 1.11 2005/08/20 19:20:54 bouyer Exp $	*/
 
 /*
  *
@@ -33,7 +33,7 @@
 
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: xen_machdep.c,v 1.10 2005/06/15 22:08:08 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: xen_machdep.c,v 1.11 2005/08/20 19:20:54 bouyer Exp $");
 
 #include "opt_xen.h"
 
@@ -586,6 +586,15 @@ xpq_increment_idx(void)
 		xpq_flush_queue();
 }
 
+void
+xpq_queue_machphys_update(paddr_t ma, paddr_t pa)
+{
+	XENPRINTK2(("xpq_queue_machphys_update ma=%p pa=%p\n", (void *)ma, (void *)pa));
+	xpq_queue[xpq_idx].pa.ptr = ma | MMU_MACHPHYS_UPDATE;
+	xpq_queue[xpq_idx].pa.val = (pa - XPMAP_OFFSET) >> PAGE_SHIFT;
+	xpq_increment_idx();
+}
+
 void
 xpq_queue_invlpg(vaddr_t va)
 {
diff --git a/sys/arch/xen/include/xenpmap.h b/sys/arch/xen/include/xenpmap.h
index 540c903ce820..e2dac66a68c4 100644
--- a/sys/arch/xen/include/xenpmap.h
+++ b/sys/arch/xen/include/xenpmap.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: xenpmap.h,v 1.7 2005/05/31 12:36:56 yamt Exp $	*/
+/*	$NetBSD: xenpmap.h,v 1.8 2005/08/20 19:20:54 bouyer Exp $	*/
 
 /*
  *
@@ -37,6 +37,7 @@
 
 #define	INVALID_P2M_ENTRY	(~0UL)
 
+void xpq_queue_machphys_update(paddr_t, paddr_t);
 void xpq_queue_invlpg(vaddr_t);
 void xpq_queue_pde_update(pd_entry_t *, pd_entry_t);
 void xpq_queue_pte_update(pt_entry_t *, pt_entry_t);