2010-05-29 11:09:12 +08:00
|
|
|
/*
|
|
|
|
* Copyright 2010 Tilera Corporation. All Rights Reserved.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
* as published by the Free Software Foundation, version 2.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful, but
|
|
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
|
|
* NON INFRINGEMENT. See the GNU General Public License for
|
|
|
|
* more details.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/thread_info.h>
|
2011-03-01 02:21:52 +08:00
|
|
|
#include <asm/timex.h>
|
2010-05-29 11:09:12 +08:00
|
|
|
|
|
|
|
void __udelay(unsigned long usecs)
|
|
|
|
{
|
2011-03-01 02:21:52 +08:00
|
|
|
if (usecs > ULONG_MAX / 1000) {
|
|
|
|
WARN_ON_ONCE(usecs > ULONG_MAX / 1000);
|
|
|
|
usecs = ULONG_MAX / 1000;
|
|
|
|
}
|
|
|
|
__ndelay(usecs * 1000);
|
2010-05-29 11:09:12 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(__udelay);
|
|
|
|
|
|
|
|
void __ndelay(unsigned long nsecs)
|
|
|
|
{
|
2011-03-01 02:21:52 +08:00
|
|
|
cycles_t target = get_cycles();
|
|
|
|
target += ns2cycles(nsecs);
|
|
|
|
while (get_cycles() < target)
|
|
|
|
cpu_relax();
|
2010-05-29 11:09:12 +08:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(__ndelay);
|
|
|
|
|
2011-03-01 02:21:52 +08:00
|
|
|
void __delay(unsigned long cycles)
|
|
|
|
{
|
|
|
|
cycles_t target = get_cycles() + cycles;
|
|
|
|
while (get_cycles() < target)
|
|
|
|
cpu_relax();
|
|
|
|
}
|
2010-05-29 11:09:12 +08:00
|
|
|
EXPORT_SYMBOL(__delay);
|