// SPDX-License-Identifier: GPL-2.0-only
/*
* OpenRISC Linux
*
* Linux architectural port borrowing liberally from similar works of
* others . All original copyrights apply as per the original source
* declaration .
*
* Modifications for the OpenRISC architecture :
* Copyright ( C ) 2010 - 2011 Jonas Bonn < jonas @ southpole . se >
*
* Precise Delay Loops
*/
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/timex.h>
#include <asm /param.h>
#include <asm /delay.h>
#include <asm /timex.h>
#include <asm /processor.h>
int read_current_timer(unsigned long *timer_value)
{
*timer_value = get_cycles();
return 0 ;
}
void __delay(unsigned long cycles)
{
cycles_t start = get_cycles();
while ((get_cycles() - start) < cycles)
cpu_relax();
}
EXPORT_SYMBOL(__delay);
inline void __const_udelay(unsigned long xloops)
{
unsigned long long loops;
loops = (unsigned long long )xloops * loops_per_jiffy * HZ;
__delay(loops >> 32 );
}
EXPORT_SYMBOL(__const_udelay);
void __udelay(unsigned long usecs)
{
__const_udelay(usecs * 0 x10C7UL); /* 2**32 / 1000000 (rounded up) */
}
EXPORT_SYMBOL(__udelay);
void __ndelay(unsigned long nsecs)
{
__const_udelay(nsecs * 0 x5UL); /* 2**32 / 1000000000 (rounded up) */
}
EXPORT_SYMBOL(__ndelay);
Messung V0.5 in Prozent C=94 H=69 G=82
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-09-29)
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