[src/trunk]: src/sys/arch/usermode/usermode Implement pmap_is_referenced()

[reinoud <reinoud%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/420d70b16250
branches:  trunk
changeset: 769029:420d70b16250
user:      reinoud <reinoud%NetBSD.org@localhost>
date:      Tue Aug 30 11:57:20 2011 +0000

description:
Implement pmap_is_referenced()

diffstat:

 sys/arch/usermode/usermode/pmap.c |  14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diffs (36 lines):

diff -r 5c23b5abd6be -r 420d70b16250 sys/arch/usermode/usermode/pmap.c
--- a/sys/arch/usermode/usermode/pmap.c Tue Aug 30 11:53:22 2011 +0000
+++ b/sys/arch/usermode/usermode/pmap.c Tue Aug 30 11:57:20 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.46 2011/08/30 11:53:22 reinoud Exp $ */
+/* $NetBSD: pmap.c,v 1.47 2011/08/30 11:57:20 reinoud Exp $ */
 
 /*-
  * Copyright (c) 2011 Reinoud Zandijk <reinoud%NetBSD.org@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.46 2011/08/30 11:53:22 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.47 2011/08/30 11:57:20 reinoud Exp $");
 
 #include "opt_memsize.h"
 #include "opt_kmempages.h"
@@ -929,10 +929,14 @@
 }
 
 bool
-pmap_is_referenced(struct vm_page *pg)
+pmap_is_referenced(struct vm_page *page)
 {
-aprint_debug("pmap_is_referenced not implemented\n");
-       return false;
+       intptr_t ppn;
+
+       ppn = atop(VM_PAGE_TO_PHYS(page));
+       aprint_debug("pmap_is_referenced page %"PRIiPTR"\n", ppn);
+
+       return (pv_table[ppn].pv_pflags & PV_REFERENCED) != 0;
 }
 
 paddr_t