ARM: aarch64: mmu: Fix disabling the MMU

Do it as U-Boot: Disable MMU first, then flush caches and finally
invalidate tlbs. I wish I could reference some document instead of
U-Boot code, but I haven't found anything.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 2 insertions, 5 deletions

diff --git a/arch/arm/cpu/mmu_64.c b/arch/arm/cpu/mmu_64.c
index 165ff5bac6..6606405b21 100644
--- a/arch/arm/cpu/mmu_64.c
+++ b/arch/arm/cpu/mmu_64.c
@@ -329,12 +329,9 @@ void mmu_disable(void)
 	cr = get_cr();
 	cr &= ~(CR_M | CR_C);
 
-	tlb_invalidate();
-
-	dsb();
-	isb();
-
 	set_cr(cr);
+	v8_flush_dcache_all();
+	tlb_invalidate();
 
 	dsb();
 	isb();