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ARMv8: fix bug for flush data cache by set/way

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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>
This commit is contained in:
Leo Yan 2014-03-31 09:50:35 +08:00 committed by Albert ARIBAUD
parent 88590148fa
commit 42ddfad6ab
1 changed files with 1 additions and 3 deletions
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4
arch/arm/cpu/armv8/cache.S
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@ -31,9 +31,7 @@ ENTRY(__asm_flush_dcache_level)
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 */