From 39e96c8835c36b6867b4e18698b06746972cdfcc Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 18 Nov 2008 17:48:22 +0800 Subject: 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 Signed-off-by: Bryan Wu --- arch/blackfin/mach-common/cache.S | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'arch/blackfin') diff --git a/arch/blackfin/mach-common/cache.S b/arch/blackfin/mach-common/cache.S index db532181fbde..d6780b495241 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; -- cgit v1.2.3