LXR linux/arch/s390/include/asm/cputime.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 *  Copyright IBM Corp. 2004
   4 *
   5 *  Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
   6 */
   7
   8#ifndef _S390_CPUTIME_H
   9#define _S390_CPUTIME_H
  10
  11#include <linux/types.h>
  12#include <asm/timex.h>
  13
  14#define CPUTIME_PER_USEC 4096ULL
  15#define CPUTIME_PER_SEC (CPUTIME_PER_USEC * USEC_PER_SEC)
  16
  17/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
  18
  19#define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
  20
  21/*
  22 * Convert cputime to microseconds.
  23 */
  24static inline u64 cputime_to_usecs(const u64 cputime)
  25{
  26        return cputime >> 12;
  27}
  28
  29/*
  30 * Convert cputime to nanoseconds.
  31 */
  32#define cputime_to_nsecs(cputime) tod_to_ns(cputime)
  33
  34u64 arch_cpu_idle_time(int cpu);
  35
  36#define arch_idle_time(cpu) arch_cpu_idle_time(cpu)
  37
  38#endif /* _S390_CPUTIME_H */
  39