summaryrefslogtreecommitdiff
path: root/arch/um/sys-i386/delay.c
blob: 2c11b9770e8b351c3756864237ff27b9be721e41 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <asm/param.h>

void __delay(unsigned long time)
{
	/* Stolen from the i386 __loop_delay */
	int d0;
	__asm__ __volatile__(
		"\tjmp 1f\n"
		".align 16\n"
		"1:\tjmp 2f\n"
		".align 16\n"
		"2:\tdecl %0\n\tjns 2b"
		:"=&a" (d0)
		:"0" (time));
}

void __udelay(unsigned long usecs)
{
	int i, n;

	n = (loops_per_jiffy * HZ * usecs) / MILLION;
        for(i=0;i<n;i++)
                cpu_relax();
}

EXPORT_SYMBOL(__udelay);

void __const_udelay(unsigned long usecs)
{
	int i, n;

	n = (loops_per_jiffy * HZ * usecs) / MILLION;
        for(i=0;i<n;i++)
                cpu_relax();
}

EXPORT_SYMBOL(__const_udelay);