michaelh/zephyr
1
0
Fork 0
Code Releases Activity

arm64: mmu: invalidate all data caches before enable them

Browse source 
Datas in data cache are dirty before data caches are enabled,
so need to invalidate all data caches firstly before enable
them.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
This commit is contained in:
Jiafei Pan 2021-04-23 14:13:58 +08:00 • committed by Carles Cufí
commit a89cb1cc13
1 changed files with 4 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

4
arch/arm64/core/mmu.c
View file

@ -7,6 +7,7 @@
* SPDX-License-Identifier: Apache-2.0
*/
#include <cache.h>
#include <device.h>
#include <init.h>
#include <kernel.h>
@ -762,6 +763,9 @@ static void enable_mmu_el1(struct arm_mmu_ptables *ptables, unsigned int flags)
/* Ensure these changes are seen before MMU is enabled */
isb();
/* Invalidate all data caches before enable them */
sys_dcache_all(K_CACHE_INVD);
/* Enable the MMU and data cache */
val = read_sctlr_el1();
write_sctlr_el1(val | SCTLR_M_BIT | SCTLR_C_BIT);