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/*
* (C) Copyright 2012 Stephen Warren
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/timer.h>
ulong get_timer_us(ulong base)
{
struct bcm2835_timer_regs *regs =
(struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR;
return readl(®s->clo) - base;
}
ulong get_timer(ulong base)
{
ulong us = get_timer_us(0);
us /= (1000000 / CONFIG_SYS_HZ);
us -= base;
return us;
}
unsigned long long get_ticks(void)
{
return get_timer(0);
}
ulong get_tbclk(void)
{
return CONFIG_SYS_HZ;
}
void __udelay(unsigned long usec)
{
ulong endtime;
signed long diff;
endtime = get_timer_us(0) + usec;
do {
ulong now = get_timer_us(0);
diff = endtime - now;
} while (diff >= 0);
}
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