u-boot/arch/arm/cpu/armv7/arch_timer.c
Simon Glass 1045315df0 common: Move get_ticks() function out of common.h
This function belongs in time.h so move it over and add a comment.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2019-12-02 18:23:13 -05:00

62 lines
1 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2012-2014
* Texas Instruments Incorporated, <www.ti.com>
*/
#include <common.h>
#include <time.h>
#include <asm/io.h>
#include <div64.h>
#include <bootstage.h>
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_SYS_HZ_CLOCK
static inline u32 read_cntfrq(void)
{
u32 frq;
asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (frq));
return frq;
}
#endif
int timer_init(void)
{
gd->arch.tbl = 0;
gd->arch.tbu = 0;
#ifdef CONFIG_SYS_HZ_CLOCK
gd->arch.timer_rate_hz = CONFIG_SYS_HZ_CLOCK;
#else
gd->arch.timer_rate_hz = read_cntfrq();
#endif
return 0;
}
unsigned long long get_ticks(void)
{
ulong nowl, nowu;
asm volatile("mrrc p15, 0, %0, %1, c14" : "=r" (nowl), "=r" (nowu));
gd->arch.tbl = nowl;
gd->arch.tbu = nowu;
return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl;
}
ulong timer_get_boot_us(void)
{
if (!gd->arch.timer_rate_hz)
timer_init();
return lldiv(get_ticks(), gd->arch.timer_rate_hz / 1000000);
}
ulong get_tbclk(void)
{
return gd->arch.timer_rate_hz;
}