* [PATCH 1/1] ARM: Only clean the D-cache to the PoU in v7_flush_kern_dcache_area()
@ 2011-07-11 16:38 Catalin Marinas
0 siblings, 0 replies; only message in thread
From: Catalin Marinas @ 2011-07-11 16:38 UTC (permalink / raw)
To: linux-arm-kernel
With PIPT caches (like ARMv7), there is no need to clean&invalidate the
D-cache via the __cpuc_flush_dcache_area() function as there are no
aliases. The D-cache only needs to be cleaned for the coherency with
the I-cache.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
arch/arm/mm/cache-v7.S | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S
index d32f02b..b4faccd 100644
--- a/arch/arm/mm/cache-v7.S
+++ b/arch/arm/mm/cache-v7.S
@@ -224,7 +224,7 @@ ENTRY(v7_flush_kern_dcache_area)
sub r3, r2, #1
bic r0, r0, r3
1:
- mcr p15, 0, r0, c7, c14, 1 @ clean & invalidate D line / unified line
+ mcr p15, 0, r0, c7, c11, 1 @ clean D line to the point of unification
add r0, r0, r2
cmp r0, r1
blo 1b
--
Catalin
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2011-07-11 16:38 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-07-11 16:38 [PATCH 1/1] ARM: Only clean the D-cache to the PoU in v7_flush_kern_dcache_area() Catalin Marinas
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).