From: Catalin Marinas <catalin.marinas@arm.com>
Date: Fri, 7 May 2010 15:26:24 +0000 (+0100)
Subject: ARM: 6111/1: Implement read/write for ownership in the ARMv6 DMA cache ops
X-Git-Tag: v2.6.34~8^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4d6477f7f073b99220386d62f5bf54bec3482cc;p=pandora-kernel.git

ARM: 6111/1: Implement read/write for ownership in the ARMv6 DMA cache ops

The Snoop Control Unit on the ARM11MPCore hardware does not detect the
cache operations and the dma_cache_maint*() functions may leave stale
cache entries on other CPUs. The solution implemented in this patch
performs a Read or Write For Ownership in the ARMv6 DMA cache
maintenance functions. These LDR/STR instructions change the cache line
state to shared or exclusive so that the cache maintenance operation has
the desired effect.

Tested-by: George G. Davis <gdavis@mvista.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

Reading git-diff-tree failed