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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - arch/s390/include/asm/cputime.h
2 * Copyright IBM Corp. 2004
4 * Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
7 #ifndef _S390_CPUTIME_H
8 #define _S390_CPUTIME_H
10 #include <linux/types.h>
11 #include <linux/percpu.h>
12 #include <linux/spinlock.h>
13 #include <asm/div64.h>
15 /* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
17 typedef unsigned long long __nocast cputime_t
;
18 typedef unsigned long long __nocast cputime64_t
;
20 static inline unsigned long __div(unsigned long long n
, unsigned long base
)
26 asm ("dr %0,%1" : "+d" (rp
) : "d" (base
>> 1));
28 #else /* CONFIG_64BIT */
30 #endif /* CONFIG_64BIT */
33 #define cputime_one_jiffy jiffies_to_cputime(1)
36 * Convert cputime to jiffies and back.
38 static inline unsigned long cputime_to_jiffies(const cputime_t cputime
)
40 return __div((__force
unsigned long long) cputime
, 4096000000ULL / HZ
);
43 static inline cputime_t
jiffies_to_cputime(const unsigned int jif
)
45 return (__force cputime_t
)(jif
* (4096000000ULL / HZ
));
48 static inline u64
cputime64_to_jiffies64(cputime64_t cputime
)
50 unsigned long long jif
= (__force
unsigned long long) cputime
;
51 do_div(jif
, 4096000000ULL / HZ
);
55 static inline cputime64_t
jiffies64_to_cputime64(const u64 jif
)
57 return (__force cputime64_t
)(jif
* (4096000000ULL / HZ
));
61 * Convert cputime to microseconds and back.
63 static inline unsigned int cputime_to_usecs(const cputime_t cputime
)
65 return (__force
unsigned long long) cputime
>> 12;
68 static inline cputime_t
usecs_to_cputime(const unsigned int m
)
70 return (__force cputime_t
)(m
* 4096ULL);
73 #define usecs_to_cputime64(m) usecs_to_cputime(m)
76 * Convert cputime to milliseconds and back.
78 static inline unsigned int cputime_to_secs(const cputime_t cputime
)
80 return __div((__force
unsigned long long) cputime
, 2048000000) >> 1;
83 static inline cputime_t
secs_to_cputime(const unsigned int s
)
85 return (__force cputime_t
)(s
* 4096000000ULL);
89 * Convert cputime to timespec and back.
91 static inline cputime_t
timespec_to_cputime(const struct timespec
*value
)
93 unsigned long long ret
= value
->tv_sec
* 4096000000ULL;
94 return (__force cputime_t
)(ret
+ value
->tv_nsec
* 4096 / 1000);
97 static inline void cputime_to_timespec(const cputime_t cputime
,
98 struct timespec
*value
)
100 unsigned long long __cputime
= (__force
unsigned long long) cputime
;
104 rp
.pair
= __cputime
>> 1;
105 asm ("dr %0,%1" : "+d" (rp
) : "d" (2048000000UL));
106 value
->tv_nsec
= rp
.subreg
.even
* 1000 / 4096;
107 value
->tv_sec
= rp
.subreg
.odd
;
109 value
->tv_nsec
= (__cputime
% 4096000000ULL) * 1000 / 4096;
110 value
->tv_sec
= __cputime
/ 4096000000ULL;
115 * Convert cputime to timeval and back.
116 * Since cputime and timeval have the same resolution (microseconds)
119 static inline cputime_t
timeval_to_cputime(const struct timeval
*value
)
121 unsigned long long ret
= value
->tv_sec
* 4096000000ULL;
122 return (__force cputime_t
)(ret
+ value
->tv_usec
* 4096ULL);
125 static inline void cputime_to_timeval(const cputime_t cputime
,
126 struct timeval
*value
)
128 unsigned long long __cputime
= (__force
unsigned long long) cputime
;
132 rp
.pair
= __cputime
>> 1;
133 asm ("dr %0,%1" : "+d" (rp
) : "d" (2048000000UL));
134 value
->tv_usec
= rp
.subreg
.even
/ 4096;
135 value
->tv_sec
= rp
.subreg
.odd
;
137 value
->tv_usec
= (__cputime
% 4096000000ULL) / 4096;
138 value
->tv_sec
= __cputime
/ 4096000000ULL;
143 * Convert cputime to clock and back.
145 static inline clock_t cputime_to_clock_t(cputime_t cputime
)
147 unsigned long long clock
= (__force
unsigned long long) cputime
;
148 do_div(clock
, 4096000000ULL / USER_HZ
);
152 static inline cputime_t
clock_t_to_cputime(unsigned long x
)
154 return (__force cputime_t
)(x
* (4096000000ULL / USER_HZ
));
158 * Convert cputime64 to clock.
160 static inline clock_t cputime64_to_clock_t(cputime64_t cputime
)
162 unsigned long long clock
= (__force
unsigned long long) cputime
;
163 do_div(clock
, 4096000000ULL / USER_HZ
);
167 struct s390_idle_data
{
169 unsigned int sequence
;
170 unsigned long long idle_count
;
171 unsigned long long idle_time
;
172 unsigned long long clock_idle_enter
;
173 unsigned long long clock_idle_exit
;
174 unsigned long long timer_idle_enter
;
175 unsigned long long timer_idle_exit
;
178 DECLARE_PER_CPU(struct s390_idle_data
, s390_idle
);
180 cputime64_t
s390_get_idle_time(int cpu
);
182 #define arch_idle_time(cpu) s390_get_idle_time(cpu)
184 static inline int s390_nohz_delay(int cpu
)
186 return __get_cpu_var(s390_idle
).nohz_delay
!= 0;
189 #define arch_needs_cpu(cpu) s390_nohz_delay(cpu)
191 #endif /* _S390_CPUTIME_H */