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| author | Catalin Marinas <catalin.marinas@arm.com> | 2010-07-01 13:21:47 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-02 10:10:09 +0100 |
| commit | 2503a5ecd86c002506001eba432c524ea009fe7f (patch) | |
| tree | 02f4646b29de1194154db5bd387298c222ffaf59 | |
| parent | 00952d8f14447fccfb9560d98999f7489d4fd2df (diff) | |
| download | op-kernel-dev-2503a5ecd86c002506001eba432c524ea009fe7f.zip op-kernel-dev-2503a5ecd86c002506001eba432c524ea009fe7f.tar.gz | |
ARM: 6201/1: RealView: Do not use outer_sync() on ARM11MPCore boards with L220
RealView boards with certain revisions of the L220 cache controller (ARM11*
processors only) may have issues (hardware deadlock) with the recent changes to
the mb() barrier implementation (DSB followed by an L2 cache sync). The patch
redefines the RealView ARM11MPCore mandatory barriers without the outer_sync()
call.
Cc: <stable@kernel.org>
Tested-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mach-realview/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm/mach-realview/include/mach/barriers.h | 8 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig index ee5e392..b4575ae 100644 --- a/arch/arm/mach-realview/Kconfig +++ b/arch/arm/mach-realview/Kconfig @@ -18,6 +18,7 @@ config REALVIEW_EB_ARM11MP bool "Support ARM11MPCore tile" depends on MACH_REALVIEW_EB select CPU_V6 + select ARCH_HAS_BARRIERS if SMP help Enable support for the ARM11MPCore tile on the Realview platform. @@ -35,6 +36,7 @@ config MACH_REALVIEW_PB11MP select CPU_V6 select ARM_GIC select HAVE_PATA_PLATFORM + select ARCH_HAS_BARRIERS if SMP help Include support for the ARM(R) RealView MPCore Platform Baseboard. PB11MPCore is a platform with an on-board ARM11MPCore and has diff --git a/arch/arm/mach-realview/include/mach/barriers.h b/arch/arm/mach-realview/include/mach/barriers.h new file mode 100644 index 0000000..0c5d749 --- /dev/null +++ b/arch/arm/mach-realview/include/mach/barriers.h @@ -0,0 +1,8 @@ +/* + * Barriers redefined for RealView ARM11MPCore platforms with L220 cache + * controller to work around hardware errata causing the outer_sync() + * operation to deadlock the system. + */ +#define mb() dsb() +#define rmb() dmb() +#define wmb() mb() |
