From: Mike Frysinger Date: Tue, 18 Nov 2008 09:48:22 +0000 (+0800) Subject: Blackfin arch: fix bug - dmacopy test case fail on all platform X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=39e96c8835c36b6867b4e18698b06746972cdfcc;p=linux-2.6-omap-h63xx.git 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 --- diff --git a/arch/blackfin/mach-common/cache.S b/arch/blackfin/mach-common/cache.S index db532181fbd..d6780b49524 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;