src/arch/ppc/lib/timer.c


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

/* Copyright 2000  AG Electronics Ltd. */
/* This code is distributed without warranty under the GPL v2 (see COPYING) */

#include <ppc.h>
#include <timer.h>
#include <clock.h>

unsigned long get_hz(void)
{
	return get_clock_speed();
}

#if 0
unsigned long ticks_since_boot(void)
{
	extern unsigned long _get_ticks(void);
	return _get_ticks();
}

void sleep_ticks(unsigned long ticks)
{
	unsigned long now = ticks_since_boot();
	unsigned long then = ticks + now;
	while(now < then)
		now = ticks_since_boot();
}
#endif

void udelay(int usecs)
{
	extern void _wait_ticks(unsigned long);
	unsigned long ticksperusec = get_hz() / 1000000;

	_wait_ticks(ticksperusec * usecs);
}