Commit 2503a5ec authored by Catalin Marinas's avatar Catalin Marinas Committed by Russell King

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: default avatarLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 00952d8f
......@@ -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
......
/*
* 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()
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