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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-01-17 15:35:37 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-02-02 21:23:28 +0000 |
| commit | 7db44c75a241c18d03e82540c5b825216d4c668b (patch) | |
| tree | ed60c9c5b8f894742ff5cfee278e542f5d8818b6 /arch/arm/mm/abort-ev6.S | |
| parent | c786282e6dd18fe2ff43ab44411085dc40e7fbc5 (diff) | |
| download | blackbird-op-linux-7db44c75a241c18d03e82540c5b825216d4c668b.tar.gz blackbird-op-linux-7db44c75a241c18d03e82540c5b825216d4c668b.zip | |
ARM: v6k: select clear exclusive code seqences according to V6 variants
If CONFIG_CPU_V6 is enabled, then the kernel must support ARMv6 CPUs
which don't have the V6K extensions implemented. Always use the
dummy store-exclusive method to ensure that the exclusive monitors are
cleared.
If CONFIG_CPU_V6 is not set, but CONFIG_CPU_32v6K is enabled, then we
have the K extensions available on all CPUs we're building support for,
so we can use the new clear-exclusive instruction.
Acked-by: Tony Lindgren <tony@atomide.com>
Tested-by: Sourav Poddar <sourav.poddar@ti.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/abort-ev6.S')
| -rw-r--r-- | arch/arm/mm/abort-ev6.S | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm/mm/abort-ev6.S b/arch/arm/mm/abort-ev6.S index f332df7f0d37..1478aa522144 100644 --- a/arch/arm/mm/abort-ev6.S +++ b/arch/arm/mm/abort-ev6.S @@ -20,11 +20,11 @@ */ .align 5 ENTRY(v6_early_abort) -#ifdef CONFIG_CPU_32v6K - clrex -#else +#ifdef CONFIG_CPU_V6 sub r1, sp, #4 @ Get unused stack location strex r0, r1, [r1] @ Clear the exclusive monitor +#elif defined(CONFIG_CPU_32v6K) + clrex #endif mrc p15, 0, r1, c5, c0, 0 @ get FSR mrc p15, 0, r0, c6, c0, 0 @ get FAR |
