1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/*
* include/asm-s390/cputime.h
*
* (C) Copyright IBM Corp. 2004
*
* Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _S390_CPUTIME_H
#define _S390_CPUTIME_H
#include <linux/types.h>
#include <linux/percpu.h>
#include <linux/spinlock.h>
#include <asm/div64.h>
/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
typedef unsigned long long cputime_t;
typedef unsigned long long cputime64_t;
#ifndef __s390x__
static inline unsigned int
__div(unsigned long long n, unsigned int base)
{
register_pair rp;
rp.pair = n >> 1;
asm ("dr %0,%1" : "+d" (rp) : "d" (base >> 1));
return rp.subreg.odd;
}
#else /* __s390x__ */
static inline unsigned int
__div(unsigned long long n, unsigned int base)
{
return n / base;
}
#endif /* __s390x__ */
#define cputime_zero (0ULL)
#define cputime_max ((~0UL >> 1) - 1)
#define cputime_add(__a, __b) ((__a) + (__b))
#define cputime_sub(__a, __b) ((__a) - (__b))
#define cputime_div(__a, __n) ({ \
unsigned long long __div = (__a); \
do_div(__div,__n); \
__div; \
})
#define cputime_halve(__a) ((__a) >> 1)
#define cputime_eq(__a, __b) ((__a) == (__b))
#define cputime_gt(__a, __b) ((__a) > (__b))
#define cputime_ge(__a, __b) ((__a) >= (__b))
#define cputime_lt(__a, __b) ((__a) < (__b))
#define cputime_le(__a, __b) ((__a) <= (__b))
#define cputime_to_jiffies(__ct) (__div((__ct), 4096000000ULL / HZ))
#define cputime_to_scaled(__ct) (__ct)
#define jiffies_to_cputime(__hz) ((cputime_t)(__hz) * (4096000000ULL / HZ))
#define cputime64_zero (0ULL)
#define cputime64_add(__a, __b) ((__a) + (__b))
#define cputime_to_cputime64(__ct) (__ct)
static inline u64
cputime64_to_jiffies64(cputime64_t cputime)
{
do_div(cputime, 4096000000ULL / HZ);
return cputime;
}
/*
* Convert cputime to milliseconds and back.
*/
static inline unsigned int
cputime_to_msecs(const cputime_t cputime)
{
return __div(cputime, 4096000);
}
static inline cputime_t
msecs_to_cputime(const unsigned int m)
{
return (cputime_t) m * 4096000;
}
/*
* Convert cputime to milliseconds and back.
*/
static inline unsigned int
cputime_to_secs(const cputime_t cputime)
{
return __div(cputime, 2048000000) >> 1;
}
static inline cputime_t
secs_to_cputime(const unsigned int s)
{
return (cputime_t) s * 4096000000ULL;
}
/*
* Convert cputime to timespec and back.
*/
static inline cputime_t
timespec_to_cputime(const struct timespec *value)
{
return value->tv_nsec * 4096 / 1000 + (u64) value->tv_sec * 4096000000ULL;
}
static inline void
cputime_to_timespec(const cputime_t cputime, struct timespec *value)
{
#ifndef __s390x__
register_pair rp;
rp.pair = cputime >> 1;
asm ("dr %0,%1" : "+d" (rp) : "d" (2048000000UL));
value->tv_nsec = rp.subreg.even * 1000 / 4096;
value->tv_sec = rp.subreg.odd;
#else
value->tv_nsec = (cputime % 4096000000ULL) * 1000 / 4096;
value->tv_sec = cputime / 4096000000ULL;
#endif
}
/*
* Convert cputime to timeval and back.
* Since cputime and timeval have the same resolution (microseconds)
* this is easy.
*/
static inline cputime_t
timeval_to_cputime(const struct timeval *value)
{
return value->tv_usec * 4096 + (u64) value->tv_sec * 4096000000ULL;
}
static inline void
cputime_to_timeval(const cputime_t cputime, struct timeval *value)
{
#ifndef __s390x__
register_pair rp;
rp.pair = cputime >> 1;
asm ("dr %0,%1" : "+d" (rp) : "d" (2048000000UL));
value->tv_usec = rp.subreg.even / 4096;
value->tv_sec = rp.subreg.odd;
#else
value->tv_usec = (cputime % 4096000000ULL) / 4096;
value->tv_sec = cputime / 4096000000ULL;
#endif
}
/*
* Convert cputime to clock and back.
*/
static inline clock_t
cputime_to_clock_t(cputime_t cputime)
{
return __div(cputime, 4096000000ULL / USER_HZ);
}
static inline cputime_t
clock_t_to_cputime(unsigned long x)
{
return (cputime_t) x * (4096000000ULL / USER_HZ);
}
/*
* Convert cputime64 to clock.
*/
static inline clock_t
cputime64_to_clock_t(cputime64_t cputime)
{
return __div(cputime, 4096000000ULL / USER_HZ);
}
struct s390_idle_data {
unsigned int sequence;
unsigned long long idle_count;
unsigned long long idle_enter;
unsigned long long idle_time;
};
DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
void vtime_start_cpu(void);
cputime64_t s390_get_idle_time(int cpu);
#define arch_idle_time(cpu) s390_get_idle_time(cpu)
static inline void s390_idle_check(void)
{
if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
vtime_start_cpu();
}
#endif /* _S390_CPUTIME_H */
|
