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authorMike Frysinger <vapier.adi@gmail.com>2008-11-18 17:48:22 +0800
committerBryan Wu <cooloney@kernel.org>2008-11-18 17:48:22 +0800
commit39e96c8835c36b6867b4e18698b06746972cdfcc (patch)
treeb2913d1dad2492adba6413a820c80372fbb2b208 /arch/blackfin
parent4ee1c45337e7b529eed644c6f62399d797dcbc10 (diff)
downloadop-kernel-dev-39e96c8835c36b6867b4e18698b06746972cdfcc.zip
op-kernel-dev-39e96c8835c36b6867b4e18698b06746972cdfcc.tar.gz
Blackfin arch: fix bug - dmacopy test case fail on all platform
The cache code I added flushes 1 line too little if the start address is not aligned to the cache size. Cache align the start address so that when we straddle cache aligns, we get the right count. Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/mach-common/cache.S6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/blackfin/mach-common/cache.S b/arch/blackfin/mach-common/cache.S
index db53218..d6780b4 100644
--- a/arch/blackfin/mach-common/cache.S
+++ b/arch/blackfin/mach-common/cache.S
@@ -25,9 +25,13 @@
*/
.macro do_flush flushins:req optflushins optnopins label
+ R2 = -L1_CACHE_BYTES;
+
+ /* start = (start & -L1_CACHE_BYTES) */
+ R0 = R0 & R2;
+
/* end = ((end - 1) & -L1_CACHE_BYTES) + L1_CACHE_BYTES; */
R1 += -1;
- R2 = -L1_CACHE_BYTES;
R1 = R1 & R2;
R1 += L1_CACHE_BYTES;
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