arch/powerpc/include/asm/cputime.h

   1 /*
   2  * Definitions for measuring cputime on powerpc machines.
   3  *
   4  * Copyright (C) 2006 Paul Mackerras, IBM Corp.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * If we have CONFIG_VIRT_CPU_ACCOUNTING_NATIVE, we measure cpu time in
  12  * the same units as the timebase.  Otherwise we measure cpu time
  13  * in jiffies using the generic definitions.
  14  */
  15
  16 #ifndef __POWERPC_CPUTIME_H
  17 #define __POWERPC_CPUTIME_H
  18
  19 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  20
  21 #include <linux/types.h>
  22 #include <linux/time.h>
  23 #include <asm/div64.h>
  24 #include <asm/time.h>
  25 #include <asm/param.h>
  26 #include <asm/cpu_has_feature.h>
  27
  28 typedef u64 __nocast cputime_t;
  29 typedef u64 __nocast cputime64_t;
  30
  31 #define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new)
  32
  33 #ifdef __KERNEL__
  34 /*
  35  * Convert cputime <-> microseconds
  36  */
  37 extern u64 __cputime_usec_factor;
  38
  39 static inline unsigned long cputime_to_usecs(const cputime_t ct)
  40 {
  41         return mulhdu((__force u64) ct, __cputime_usec_factor);
  42 }
  43
  44 /*
  45  * PPC64 uses PACA which is task independent for storing accounting data while
  46  * PPC32 uses struct thread_info, therefore at task switch the accounting data
  47  * has to be populated in the new task
  48  */
  49 #ifdef CONFIG_PPC64
  50 static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
  51 #else
  52 void arch_vtime_task_switch(struct task_struct *tsk);
  53 #endif
  54
  55 #endif /* __KERNEL__ */
  56 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
  57 #endif /* __POWERPC_CPUTIME_H */