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authorCatalin Marinas <catalin.marinas@arm.com>2005-10-02 17:34:35 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-10-02 17:34:35 -0400
commit2c3a0540999ac9bd7147fb98833224a58cdaf217 (patch)
tree85fe67c8a02c5e7b90f9ceb2330c0e6b8d1f6b7d /arch
parent487fd4eb1445407c9760af08b0b34c3f4cdb4afc (diff)
[ARM] 2943/1: Clear the exclusive monitor in v6_early_abort
Patch from Catalin Marinas Data abort caused by ldrex/strex can leave the exclusive monitor in an unpredictable state. It is recommended that a clrex/strex is performed to clear this state. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mm/abort-ev6.S5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mm/abort-ev6.S b/arch/arm/mm/abort-ev6.S
index 8f76f3df7b4c..dbd346033122 100644
--- a/arch/arm/mm/abort-ev6.S
+++ b/arch/arm/mm/abort-ev6.S
@@ -20,6 +20,11 @@
20 */ 20 */
21 .align 5 21 .align 5
22ENTRY(v6_early_abort) 22ENTRY(v6_early_abort)
23#ifdef CONFIG_CPU_MPCORE
24 clrex
25#else
26 strex r0, r1, [sp] @ Clear the exclusive monitor
27#endif
23 mrc p15, 0, r1, c5, c0, 0 @ get FSR 28 mrc p15, 0, r1, c5, c0, 0 @ get FSR
24 mrc p15, 0, r0, c6, c0, 0 @ get FAR 29 mrc p15, 0, r0, c6, c0, 0 @ get FAR
25/* 30/*