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authorCatalin Marinas <catalin.marinas@arm.com>2012-06-25 14:59:38 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-07-09 17:39:38 +0100
commit9ad86ddde0345e903eb74837e52cf19fe0c7f825 (patch)
tree15d6bbaa38a0c7e4b55b4ee65edfa465e876efb4 /arch/arm/mm/mmu.c
parent02df19b4227e5b799e4642e88b568f9474fa78d0 (diff)
ARM: 7436/1: Do not map the vectors page as write-through on UP systems
The vectors page has been traditionally mapped as WT on UP systems but this creates a mismatched alias with the directly mapped RAM that is using WB attributes. On newer processors like Cortex-A15 this has implications on the data/instructions coherency at the point of unification (usually L2). This patch removes such restriction. Signed-off-by: Catalin Marinas <catalin.marinas@arm.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/mmu.c')
-rw-r--r--arch/arm/mm/mmu.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index e5dad60b558..f37dc1856a6 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -422,12 +422,6 @@ static void __init build_mem_type_table(void)
vecs_pgprot = kern_pgprot = user_pgprot = cp->pte;
/*
- * Only use write-through for non-SMP systems
- */
- if (!is_smp() && cpu_arch >= CPU_ARCH_ARMv5 && cachepolicy > CPOLICY_WRITETHROUGH)
- vecs_pgprot = cache_policies[CPOLICY_WRITETHROUGH].pte;
-
- /*
* Enable CPU-specific coherency if supported.
* (Only available on XSC3 at the moment.)
*/