diff --git a/sys/arch/powerpc/include/pmap.h b/sys/arch/powerpc/include/pmap.h
index 1d3305a56632..e85273863136 100644
--- a/sys/arch/powerpc/include/pmap.h
+++ b/sys/arch/powerpc/include/pmap.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: pmap.h,v 1.9 1998/09/01 16:35:50 tsubai Exp $	*/
+/*	$NetBSD: pmap.h,v 1.10 1999/02/26 14:40:45 tsubai Exp $	*/
 
 /*-
  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -75,6 +75,9 @@ paddr_t pmap_extract __P((struct pmap *, vaddr_t));
 void ptemodify __P((paddr_t, u_int, u_int));
 int ptebits __P((paddr_t, int));
 
+#define PMAP_NEED_PROCWR
+void pmap_procwr __P((struct proc *, vaddr_t, size_t));
+
 static __inline paddr_t
 vtophys(va)
 	vaddr_t va;
diff --git a/sys/arch/powerpc/powerpc/pmap.c b/sys/arch/powerpc/powerpc/pmap.c
index 099c9f1f3259..83a176df8844 100644
--- a/sys/arch/powerpc/powerpc/pmap.c
+++ b/sys/arch/powerpc/powerpc/pmap.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: pmap.c,v 1.15 1999/02/04 12:45:31 tsubai Exp $	*/
+/*	$NetBSD: pmap.c,v 1.16 1999/02/26 14:40:45 tsubai Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -1444,3 +1444,18 @@ pmap_deactivate(p)
 	struct proc *p;
 {
 }
+
+/*
+ * Synchronize caches corresponding to [addr, addr+len) in p.
+ */
+void
+pmap_procwr(p, va, len)
+	struct proc *p;
+	vaddr_t va;
+	size_t len;
+{
+	paddr_t pa;
+
+	pa = pmap_extract(p->p_vmspace->vm_map.pmap, va);
+	syncicache((void *)pa, len);
+}