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[ARM] 5034/1: fix arm{925,926,940,946} dma_flush_range() in WT mode

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The CPU's dma_flush_range() operation needs to clean+invalidate the
given memory area if the cache is in writeback mode, or do just the
invalidate part if the cache is in writethrough mode, but the current
proc-arm{925,926,940,946} (incorrectly) do a cache clean in the
latter case.  This patch fixes that.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Lennert Buytenhek
2008-05-10 21:05:31 +01:00
committed by Russell King
parent db2c439290
commit b3a8b751c1
4 changed files with 4 additions and 4 deletions
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2
arch/arm/mm/proc-arm926.S
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@ -295,7 +295,7 @@ ENTRY(arm926_dma_flush_range)
#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
mcr p15, 0, r0, c7, c14, 1 @ clean+invalidate D entry
#else
mcr p15, 0, r0, c7, c10, 1 @ clean D entry
mcr p15, 0, r0, c7, c6, 1 @ invalidate D entry
#endif
add r0, r0, #CACHE_DLINESIZE
cmp r0, r1