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- /*
- * 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 <asm/div64.h>
-
- /* We want to use micro-second resolution. */
-
- 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), 1000000 / HZ))
- #define cputime_to_scaled(__ct) (__ct)
- #define jiffies_to_cputime(__hz) ((cputime_t)(__hz) * (1000000 / 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, 1000000 / HZ);
- return cputime;
- }
-
- /*
- * Convert cputime to milliseconds and back.
- */
- static inline unsigned int
- cputime_to_msecs(const cputime_t cputime)
- {
- return __div(cputime, 1000);
- }
-
- static inline cputime_t
- msecs_to_cputime(const unsigned int m)
- {
- return (cputime_t) m * 1000;
- }
-
- /*
- * Convert cputime to milliseconds and back.
- */
- static inline unsigned int
- cputime_to_secs(const cputime_t cputime)
- {
- return __div(cputime, 1000000);
- }
-
- static inline cputime_t
- secs_to_cputime(const unsigned int s)
- {
- return (cputime_t) s * 1000000;
- }
-
- /*
- * Convert cputime to timespec and back.
- */
- static inline cputime_t
- timespec_to_cputime(const struct timespec *value)
- {
- return value->tv_nsec / 1000 + (u64) value->tv_sec * 1000000;
- }
-
- 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" (1000000 >> 1));
- value->tv_nsec = rp.subreg.even * 1000;
- value->tv_sec = rp.subreg.odd;
- #else
- value->tv_nsec = (cputime % 1000000) * 1000;
- value->tv_sec = cputime / 1000000;
- #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 + (u64) value->tv_sec * 1000000;
- }
-
- 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" (1000000 >> 1));
- value->tv_usec = rp.subreg.even;
- value->tv_sec = rp.subreg.odd;
- #else
- value->tv_usec = cputime % 1000000;
- value->tv_sec = cputime / 1000000;
- #endif
- }
-
- /*
- * Convert cputime to clock and back.
- */
- static inline clock_t
- cputime_to_clock_t(cputime_t cputime)
- {
- return __div(cputime, 1000000 / USER_HZ);
- }
-
- static inline cputime_t
- clock_t_to_cputime(unsigned long x)
- {
- return (cputime_t) x * (1000000 / USER_HZ);
- }
-
- /*
- * Convert cputime64 to clock.
- */
- static inline clock_t
- cputime64_to_clock_t(cputime64_t cputime)
- {
- return __div(cputime, 1000000 / USER_HZ);
- }
-
- #endif /* _S390_CPUTIME_H */
-