From: David Feng fenghua@phytium.com.cn
The cache disable operation shoud be performed after flush_dcache_all(). If cache disable operation is performed before flush_dcache_all(), flush_dcache_all() store data directly to memory and may be overrided by data copy in cache.
Signed-off-by: David Feng fenghua@phytium.com.cn --- arch/arm/cpu/armv8/cache_v8.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c index 9dbcdf2..dc2fc8c 100644 --- a/arch/arm/cpu/armv8/cache_v8.c +++ b/arch/arm/cpu/armv8/cache_v8.c @@ -124,9 +124,10 @@ void dcache_disable(void) if (!(sctlr & CR_C)) return;
+ flush_dcache_all(); + set_sctlr(sctlr & ~(CR_C|CR_M));
- flush_dcache_all(); __asm_invalidate_tlb_all(); }