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