| /* 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) |
