lib/time.c

/*
 * (C) Copyright 2000-2009
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * 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 as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <fthread.h>
#include <watchdog.h>

#ifndef CONFIG_WD_PERIOD
# define CONFIG_WD_PERIOD	(10 * 1000 * 1000)	/* 10 seconds default*/
#endif

/* ------------------------------------------------------------------------- */

void udelay(unsigned long usec)
{
	ulong kv;

	do {
		WATCHDOG_RESET();
		kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;
#if defined(CONFIG_FTHREAD) && !defined(CONFIG_SPL_BUILD)
		kv = fthread_usleep(kv);
		if (kv > usec)
			break;
#else
		__udelay (kv);
#endif
		usec -= kv;
	} while(usec);
}

void mdelay(unsigned long msec)
{
	while (msec--)
		udelay(1000);
}

__weak ulong timer_get_us(void)
{
	static ulong base_time;

	/*
	 * We can't implement this properly. Return 0 on the first call and
	 * larger values after that.
	 */
	if (base_time)
		return get_timer(base_time) * 1000;
	base_time = get_timer(0);
	return 0;
}