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arm: mediatek: add missing arch timer configuration for MT7629

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This patch sets CNTVOFF of ARM CP15 timer to zero to make sure the virtual
counter is fully usable for linux kernel.

Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
This commit is contained in:
Weijie Gao 2019-07-10 17:35:42 +08:00 • committed by Tom Rini
parent f752e5783b
commit ea804eb340
1 changed files with 13 additions and 0 deletions
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13
arch/arm/mach-mediatek/mt7629/lowlevel_init.S
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@ -4,6 +4,7 @@
*/
#include <linux/linkage.h>
#include <asm/proc-armv/ptrace.h>
#define WAIT_CODE_SRAM_BASE 0x0010ff00
@ -27,6 +28,18 @@ ENTRY(lowlevel_init)
movt r0, #0x131
mcr p15, 0, r0, c14, c0, 0
cps #MON_MODE
mrc p15, 0, r1, c1, c1, 0 @ Get Secure Config
orr r0, r1, #1
mcr p15, 0, r0, c1, c1, 0 @ Set Non Secure bit
isb
mov r0, #0
mcrr p15, 4, r0, r0, c14 @ CNTVOFF = 0
isb
mcr p15, 0, r1, c1, c1, 0 @ Set Secure bit
isb
cps #SVC_MODE
/* enable SMP bit */
mrc p15, 0, r0, c1, c0, 1
orr r0, r0, #0x40