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 */ 58