1/* Copyright Altera Corporation (C) 2014. All rights reserved.
 2 *
 3 * This program is free software; you can redistribute it and/or modify
 4 * it under the terms of the GNU General Public License, version 2,
 5 * as published by the Free Software Foundation.
 6 *
 7 * This program is distributed in the hope that it will be useful,
 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
14 *
15 */
16
17#include <linux/module.h>
18#include <asm/delay.h>
19#include <asm/param.h>
20#include <asm/processor.h>
21#include <asm/timex.h>
22
23void __delay(unsigned long cycles)
24{
25	cycles_t start = get_cycles();
26
27	while ((get_cycles() - start) < cycles)
28		cpu_relax();
29}
30EXPORT_SYMBOL(__delay);
31
32void __const_udelay(unsigned long xloops)
33{
34	u64 loops;
35
36	loops = (u64)xloops * loops_per_jiffy * HZ;
37
38	__delay(loops >> 32);
39}
40EXPORT_SYMBOL(__const_udelay);
41
42void __udelay(unsigned long usecs)
43{
44	__const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */
45}
46EXPORT_SYMBOL(__udelay);
47
48void __ndelay(unsigned long nsecs)
49{
50	__const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */
51}
52EXPORT_SYMBOL(__ndelay);