From a092f2b15399bb4d1aa4e83cffe775f0c946f323 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Fri, 20 Jan 2012 12:01:10 +0100 Subject: ARM: 7291/1: cache: assume 64-byte L1 cachelines for ARMv7 CPUs To ensure correct alignment of cacheline-aligned data, the maximum cacheline size needs to be known at compile time. Since Cortex-A8 and Cortex-A15 have 64-byte cachelines (and it is likely that there will be future ARMv7 implementations with the same line size) then it makes sense to assume that CPU_V7 implies a 64-byte L1 cacheline size. For CPUs with smaller caches, this will result in some harmless padding but will help with single zImage work and avoid hitting subtle bugs with misaligned data structures. Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/mm/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm/mm/Kconfig') diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 4cefb57d9ed2..1a3ca2488164 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -882,6 +882,7 @@ config CACHE_XSC3L2 config ARM_L1_CACHE_SHIFT_6 bool + default y if CPU_V7 help Setting ARM L1 cache line size to 64 Bytes. -- cgit v1.2.3