2 * Definitions for measuring cputime on powerpc machines.
4 * Copyright (C) 2006 Paul Mackerras, IBM Corp.
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.
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.
16 #ifndef __POWERPC_CPUTIME_H
17 #define __POWERPC_CPUTIME_H
19 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
20 #include <asm-generic/cputime.h>
23 #include <linux/types.h>
24 #include <linux/time.h>
25 #include <asm/div64.h>
27 #include <asm/param.h>
28 #include <asm/cpu_has_feature.h>
30 typedef u64 __nocast cputime_t;
31 typedef u64 __nocast cputime64_t;
33 #define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new)
37 * Convert cputime <-> microseconds
39 extern u64 __cputime_usec_factor;
41 static inline unsigned long cputime_to_usecs(const cputime_t ct)
43 return mulhdu((__force u64) ct, __cputime_usec_factor);
47 * PPC64 uses PACA which is task independent for storing accounting data while
48 * PPC32 uses struct thread_info, therefore at task switch the accounting data
49 * has to be populated in the new task
52 static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
54 void arch_vtime_task_switch(struct task_struct *tsk);
57 #endif /* __KERNEL__ */
58 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
59 #endif /* __POWERPC_CPUTIME_H */