From c3f0c4a045cdb78d1a45d86854152c71126d8874 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 18 Nov 2008 17:48:22 +0800 Subject: [PATCH] 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(-) diff --git a/arch/blackfin/mach-common/cache.S b/arch/blackfin/mach-common/cache.S index db532181fbdeb..d6780b4952415 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; -- 2.39.5