59 lines
962 B
C
59 lines
962 B
C
/*
|
|
* (C) Copyright 2012-2014
|
|
* Texas Instruments Incorporated, <www.ti.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <div64.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
int timer_init(void)
|
|
{
|
|
gd->arch.tbl = 0;
|
|
gd->arch.tbu = 0;
|
|
|
|
gd->arch.timer_rate_hz = CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ;
|
|
|
|
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 get_timer(ulong base)
|
|
{
|
|
return lldiv(get_ticks(), gd->arch.timer_rate_hz) - base;
|
|
}
|
|
|
|
void __udelay(unsigned long usec)
|
|
{
|
|
unsigned long long endtime;
|
|
|
|
endtime = lldiv((unsigned long long)usec * gd->arch.timer_rate_hz,
|
|
1000UL);
|
|
|
|
endtime += get_ticks();
|
|
|
|
while (get_ticks() < endtime)
|
|
;
|
|
}
|
|
|
|
ulong get_tbclk(void)
|
|
{
|
|
return gd->arch.timer_rate_hz;
|
|
}
|