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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2014 Renesas Electronics Corporation
*
* Initialization of CNTVOFF register from secure mode
*
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
ENTRY(secure_cntvoff_init)
.arch armv7-a
/*
* CNTVOFF has to be initialized either from non-secure Hypervisor
* mode or secure Monitor mode with SCR.NS==1. If TrustZone is enabled
* then it should be handled by the secure code. The CPU must implement
* the virtualization extensions.
*/
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
ret lr
ENDPROC(secure_cntvoff_init)
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