1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2014 Renesas Electronics Corp
4 *
5 * Initialization of CNTVOFF register from sec
6 *
7 */
8
9 #include <linux/linkage.h>
10 #include <asm/assembler.h>
11
12 ENTRY(secure_cntvoff_init)
13 .arch armv7-a
14 /*
15 * CNTVOFF has to be initialized eithe
16 * mode or secure Monitor mode with SC
17 * then it should be handled by the se
18 * the virtualization extensions.
19 */
20 cps #MON_MODE
21 mrc p15, 0, r1, c1, c1, 0
22 orr r0, r1, #1
23 mcr p15, 0, r0, c1, c1, 0
24 isb
25 mov r0, #0
26 mcrr p15, 4, r0, r0, c14
27 isb
28 mcr p15, 0, r1, c1, c1, 0
29 isb
30 cps #SVC_MODE
31 ret lr
32 ENDPROC(secure_cntvoff_init)
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