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

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