1/* delay.c: Delay loops for sparc64
2 *
3 * Copyright (C) 2004, 2006 David S. Miller <davem@davemloft.net>
4 *
5 * Based heavily upon x86 variant which is:
6 *	Copyright (C) 1993 Linus Torvalds
7 *	Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
8 */
9
10#include <linux/delay.h>
11#include <asm/timer.h>
12
13void __delay(unsigned long loops)
14{
15	unsigned long bclock, now;
16
17	bclock = tick_ops->get_tick();
18	do {
19		now = tick_ops->get_tick();
20	} while ((now-bclock) < loops);
21}
22
23/* We used to multiply by HZ after shifting down by 32 bits
24 * but that runs into problems for higher values of HZ and
25 * slow cpus.
26 */
27void __const_udelay(unsigned long n)
28{
29	n *= 4;
30
31	n *= (cpu_data(raw_smp_processor_id()).udelay_val * (HZ/4));
32	n >>= 32;
33
34	__delay(n + 1);
35}
36
37void __udelay(unsigned long n)
38{
39	__const_udelay(n * 0x10c7UL);
40}
41
42
43void __ndelay(unsigned long n)
44{
45	__const_udelay(n * 0x5UL);
46}
47