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wdenk5c952cf2004-10-10 21:27:30 +00001/*
2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <watchdog.h>
26
27
28extern void dly_clks( unsigned long ticks );
29
30void udelay(unsigned long usec)
31{
32 /* The Nios core doesn't have a timebase, so we do our
33 * best for now and call a low-level loop that counts
34 * cpu clocks.
35 */
36 unsigned long cnt = (CONFIG_SYS_CLK_FREQ/1000000) * usec;
37 WATCHDOG_RESET (); /* trigger watchdog if needed */
38 dly_clks (cnt);
39}