1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2017-2018 Intel Corporation <www.intel.com>
4  *
5  */
6 
7 #include <common.h>
8 #include <asm/io.h>
9 #include <asm/arch/timer.h>
10 
11 /*
12  * Timer initialization
13  */
timer_init(void)14 int timer_init(void)
15 {
16 	int enable = 0x3;	/* timer enable + output signal masked */
17 	int loadval = ~0;
18 
19 	/* enable system counter */
20 	writel(enable, SOCFPGA_GTIMER_SEC_ADDRESS);
21 	/* enable processor pysical counter */
22 	asm volatile("msr cntp_ctl_el0, %0" : : "r" (enable));
23 	asm volatile("msr cntp_tval_el0, %0" : : "r" (loadval));
24 
25 	return 0;
26 }
27