1 /* 2 * Definitions for measuring cputime on ia64 machines. 3 * 4 * Based on <asm-powerpc/cputime.h>. 5 * 6 * Copyright (C) 2007 FUJITSU LIMITED 7 * Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 * 14 * If we have CONFIG_VIRT_CPU_ACCOUNTING, we measure cpu time in nsec. 15 * Otherwise we measure cpu time in jiffies using the generic definitions. 16 */ 17 18 #ifndef __IA64_CPUTIME_H 19 #define __IA64_CPUTIME_H 20 21 #ifndef CONFIG_VIRT_CPU_ACCOUNTING 22 #include <asm-generic/cputime.h> 23 #else 24 25 #include <linux/time.h> 26 #include <linux/jiffies.h> 27 #include <asm/processor.h> 28 29 typedef u64 __nocast cputime_t; 30 typedef u64 __nocast cputime64_t; 31 32 #define cputime_one_jiffy jiffies_to_cputime(1) 33 34 /* 35 * Convert cputime <-> jiffies (HZ) 36 */ 37 #define cputime_to_jiffies(__ct) \ 38 ((__force u64)(__ct) / (NSEC_PER_SEC / HZ)) 39 #define jiffies_to_cputime(__jif) \ 40 (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ)) 41 #define cputime64_to_jiffies64(__ct) \ 42 ((__force u64)(__ct) / (NSEC_PER_SEC / HZ)) 43 #define jiffies64_to_cputime64(__jif) \ 44 (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ)) 45 46 /* 47 * Convert cputime <-> microseconds 48 */ 49 #define cputime_to_usecs(__ct) \ 50 ((__force u64)(__ct) / NSEC_PER_USEC) 51 #define usecs_to_cputime(__usecs) \ 52 (__force cputime_t)((__usecs) * NSEC_PER_USEC) 53 #define usecs_to_cputime64(__usecs) \ 54 (__force cputime64_t)((__usecs) * NSEC_PER_USEC) 55 56 /* 57 * Convert cputime <-> seconds 58 */ 59 #define cputime_to_secs(__ct) \ 60 ((__force u64)(__ct) / NSEC_PER_SEC) 61 #define secs_to_cputime(__secs) \ 62 (__force cputime_t)((__secs) * NSEC_PER_SEC) 63 64 /* 65 * Convert cputime <-> timespec (nsec) 66 */ 67 static inline cputime_t timespec_to_cputime(const struct timespec *val) 68 { 69 u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec; 70 return (__force cputime_t) ret; 71 } 72 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val) 73 { 74 val->tv_sec = (__force u64) ct / NSEC_PER_SEC; 75 val->tv_nsec = (__force u64) ct % NSEC_PER_SEC; 76 } 77 78 /* 79 * Convert cputime <-> timeval (msec) 80 */ 81 static inline cputime_t timeval_to_cputime(struct timeval *val) 82 { 83 u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_usec * NSEC_PER_USEC; 84 return (__force cputime_t) ret; 85 } 86 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val) 87 { 88 val->tv_sec = (__force u64) ct / NSEC_PER_SEC; 89 val->tv_usec = ((__force u64) ct % NSEC_PER_SEC) / NSEC_PER_USEC; 90 } 91 92 /* 93 * Convert cputime <-> clock (USER_HZ) 94 */ 95 #define cputime_to_clock_t(__ct) \ 96 ((__force u64)(__ct) / (NSEC_PER_SEC / USER_HZ)) 97 #define clock_t_to_cputime(__x) \ 98 (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ)) 99 100 /* 101 * Convert cputime64 to clock. 102 */ 103 #define cputime64_to_clock_t(__ct) \ 104 cputime_to_clock_t((__force cputime_t)__ct) 105 106 extern void arch_vtime_task_switch(struct task_struct *tsk); 107 108 #endif /* CONFIG_VIRT_CPU_ACCOUNTING */ 109 #endif /* __IA64_CPUTIME_H */ 110