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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright IBM Corp. 2004
*
* Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _S390_CPUTIME_H
#define _S390_CPUTIME_H
#include <linux/types.h>
#include <asm/timex.h>
#define CPUTIME_PER_USEC 4096ULL
#define CPUTIME_PER_SEC (CPUTIME_PER_USEC * USEC_PER_SEC)
/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
#define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
/*
* Convert cputime to microseconds.
*/
static inline u64 cputime_to_usecs(const u64 cputime)
{
return cputime >> 12;
}
/*
* Convert cputime to nanoseconds.
*/
#define cputime_to_nsecs(cputime) tod_to_ns(cputime)
u64 arch_cpu_idle_time(int cpu);
#define arch_idle_time(cpu) arch_cpu_idle_time(cpu)
#endif /* _S390_CPUTIME_H */
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