xref: /OK3568_Linux_fs/u-boot/arch/arm/cpu/armv7/arch_timer.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun  * (C) Copyright 2012-2014
3*4882a593Smuzhiyun  *     Texas Instruments Incorporated, <www.ti.com>
4*4882a593Smuzhiyun  *
5*4882a593Smuzhiyun  * SPDX-License-Identifier:     GPL-2.0+
6*4882a593Smuzhiyun  */
7*4882a593Smuzhiyun 
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <asm/io.h>
10*4882a593Smuzhiyun #include <div64.h>
11*4882a593Smuzhiyun #include <bootstage.h>
12*4882a593Smuzhiyun 
13*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
14*4882a593Smuzhiyun 
timer_init(void)15*4882a593Smuzhiyun int timer_init(void)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun 	gd->arch.tbl = 0;
18*4882a593Smuzhiyun 	gd->arch.tbu = 0;
19*4882a593Smuzhiyun 
20*4882a593Smuzhiyun 	gd->arch.timer_rate_hz = CONFIG_SYS_HZ_CLOCK;
21*4882a593Smuzhiyun 	return 0;
22*4882a593Smuzhiyun }
23*4882a593Smuzhiyun 
get_ticks(void)24*4882a593Smuzhiyun unsigned long long get_ticks(void)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun 	ulong nowl, nowu;
27*4882a593Smuzhiyun 
28*4882a593Smuzhiyun 	asm volatile("mrrc p15, 0, %0, %1, c14" : "=r" (nowl), "=r" (nowu));
29*4882a593Smuzhiyun 
30*4882a593Smuzhiyun 	gd->arch.tbl = nowl;
31*4882a593Smuzhiyun 	gd->arch.tbu = nowu;
32*4882a593Smuzhiyun 
33*4882a593Smuzhiyun 	return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun 
36*4882a593Smuzhiyun 
timer_get_boot_us(void)37*4882a593Smuzhiyun ulong timer_get_boot_us(void)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun 	return lldiv(get_ticks(), CONFIG_SYS_HZ_CLOCK / 1000000);
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun 
get_tbclk(void)42*4882a593Smuzhiyun ulong get_tbclk(void)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun 	return gd->arch.timer_rate_hz;
45*4882a593Smuzhiyun }
46