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[src/trunk]: src/sys/arch/arm/arm32 If we get a fault we shouldn't have, set ...
details: https://anonhg.NetBSD.org/src/rev/a94e036b4b93
branches: trunk
changeset: 781727:a94e036b4b93
user: matt <matt%NetBSD.org@localhost>
date: Wed Sep 26 18:18:08 2012 +0000
description:
If we get a fault we shouldn't have, set pmap_needs_pte_sync and retry.
diffstat:
sys/arch/arm/arm32/pmap.c | 15 +++++++++++++--
1 files changed, 13 insertions(+), 2 deletions(-)
diffs (36 lines):
diff -r f59e508f9d81 -r a94e036b4b93 sys/arch/arm/arm32/pmap.c
--- a/sys/arch/arm/arm32/pmap.c Wed Sep 26 15:33:43 2012 +0000
+++ b/sys/arch/arm/arm32/pmap.c Wed Sep 26 18:18:08 2012 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.237 2012/09/22 00:33:37 matt Exp $ */
+/* $NetBSD: pmap.c,v 1.238 2012/09/26 18:18:08 matt Exp $ */
/*
* Copyright 2003 Wasabi Systems, Inc.
@@ -212,7 +212,7 @@
#include <arm/cpuconf.h>
#include <arm/arm32/katelib.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.237 2012/09/22 00:33:37 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.238 2012/09/26 18:18:08 matt Exp $");
#ifdef PMAP_DEBUG
@@ -4002,6 +4002,17 @@
}
#endif /* CPU_SA110 */
+ /*
+ * If 'rv == 0' at this point, it generally indicates that there is a
+ * stale TLB entry for the faulting address. That might be due to a
+ * wrong setting of pmap_needs_pte_sync. So set it and retry.
+ */
+ if (rv == 0 && pm->pm_l1->l1_domain_use_count == 1
+ && pmap_needs_pte_sync == 0) {
+ pmap_needs_pte_sync = 1;
+ rv = 1;
+ }
+
#ifdef DEBUG
/*
* If 'rv == 0' at this point, it generally indicates that there is a
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