ARMv8: fix bug for flush data cache by set/way
When flush the d$ with set/way instruction, it need calculate the way's
offset = log2(Associativity); but in current uboot's code, it use below
formula to calculate the offset: log2(Associativity * 2 - 1), so finally
it cannot flush data cache properly.
Signed-off-by: Leo Yan <leoy@marvell.com>
diff --git a/arch/arm/cpu/armv8/cache.S b/arch/arm/cpu/armv8/cache.S
index 249799c..4b3ee6e 100644
--- a/arch/arm/cpu/armv8/cache.S
+++ b/arch/arm/cpu/armv8/cache.S
@@ -31,9 +31,7 @@
add x2, x2, #4 /* x2 <- log2(cache line size) */
mov x3, #0x3ff
and x3, x3, x6, lsr #3 /* x3 <- max number of #ways */
- add w4, w3, w3
- sub w4, w4, 1 /* round up log2(#ways + 1) */
- clz w5, w4 /* bit position of #ways */
+ clz w5, w3 /* bit position of #ways */
mov x4, #0x7fff
and x4, x4, x6, lsr #13 /* x4 <- max number of #sets */
/* x12 <- cache level << 1 */