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Diffstat (limited to 'arch/s390/include/asm/cputime.h')
-rw-r--r--arch/s390/include/asm/cputime.h168
1 files changed, 75 insertions, 93 deletions
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index 40e2ab0fa3f..f65bd363451 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -1,7 +1,5 @@
/*
- * include/asm-s390/cputime.h
- *
- * (C) Copyright IBM Corp. 2004
+ * Copyright IBM Corp. 2004
*
* Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
@@ -14,116 +12,103 @@
#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;
+/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
-#ifndef __s390x__
+typedef unsigned long long __nocast cputime_t;
+typedef unsigned long long __nocast cputime64_t;
-static inline unsigned int
-__div(unsigned long long n, unsigned int base)
+static inline unsigned long __div(unsigned long long n, unsigned long base)
{
+#ifndef CONFIG_64BIT
register_pair rp;
rp.pair = n >> 1;
asm ("dr %0,%1" : "+d" (rp) : "d" (base >> 1));
return rp.subreg.odd;
+#else /* CONFIG_64BIT */
+ return n / base;
+#endif /* CONFIG_64BIT */
}
-#else /* __s390x__ */
+#define cputime_one_jiffy jiffies_to_cputime(1)
-static inline unsigned int
-__div(unsigned long long n, unsigned int base)
+/*
+ * Convert cputime to jiffies and back.
+ */
+static inline unsigned long cputime_to_jiffies(const cputime_t cputime)
{
- return n / base;
+ return __div((__force unsigned long long) cputime, 4096000000ULL / HZ);
}
-#endif /* __s390x__ */
+static inline cputime_t jiffies_to_cputime(const unsigned int jif)
+{
+ return (__force cputime_t)(jif * (4096000000ULL / HZ));
+}
-#define cputime_zero (0ULL)
-#define cputime_one_jiffy jiffies_to_cputime(1)
-#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;
+static inline u64 cputime64_to_jiffies64(cputime64_t cputime)
+{
+ unsigned long long jif = (__force unsigned long long) cputime;
+ do_div(jif, 4096000000ULL / HZ);
+ return jif;
+}
+
+static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
+{
+ return (__force cputime64_t)(jif * (4096000000ULL / HZ));
}
/*
* Convert cputime to microseconds and back.
*/
-static inline unsigned int
-cputime_to_usecs(const cputime_t cputime)
+static inline unsigned int cputime_to_usecs(const cputime_t cputime)
{
- return cputime_div(cputime, 4096);
+ return (__force unsigned long long) cputime >> 12;
}
-static inline cputime_t
-usecs_to_cputime(const unsigned int m)
+static inline cputime_t usecs_to_cputime(const unsigned int m)
{
- return (cputime_t) m * 4096;
+ return (__force cputime_t)(m * 4096ULL);
}
+#define usecs_to_cputime64(m) usecs_to_cputime(m)
+
/*
* Convert cputime to milliseconds and back.
*/
-static inline unsigned int
-cputime_to_secs(const cputime_t cputime)
+static inline unsigned int cputime_to_secs(const cputime_t cputime)
{
- return __div(cputime, 2048000000) >> 1;
+ return __div((__force unsigned long long) cputime, 2048000000) >> 1;
}
-static inline cputime_t
-secs_to_cputime(const unsigned int s)
+static inline cputime_t secs_to_cputime(const unsigned int s)
{
- return (cputime_t) s * 4096000000ULL;
+ return (__force cputime_t)(s * 4096000000ULL);
}
/*
* Convert cputime to timespec and back.
*/
-static inline cputime_t
-timespec_to_cputime(const struct timespec *value)
+static inline cputime_t timespec_to_cputime(const struct timespec *value)
{
- return value->tv_nsec * 4096 / 1000 + (u64) value->tv_sec * 4096000000ULL;
+ unsigned long long ret = value->tv_sec * 4096000000ULL;
+ return (__force cputime_t)(ret + value->tv_nsec * 4096 / 1000);
}
-static inline void
-cputime_to_timespec(const cputime_t cputime, struct timespec *value)
+static inline void cputime_to_timespec(const cputime_t cputime,
+ struct timespec *value)
{
-#ifndef __s390x__
+ unsigned long long __cputime = (__force unsigned long long) cputime;
+#ifndef CONFIG_64BIT
register_pair rp;
- rp.pair = cputime >> 1;
+ 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;
+ value->tv_nsec = (__cputime % 4096000000ULL) * 1000 / 4096;
+ value->tv_sec = __cputime / 4096000000ULL;
#endif
}
@@ -132,77 +117,74 @@ cputime_to_timespec(const cputime_t cputime, struct timespec *value)
* Since cputime and timeval have the same resolution (microseconds)
* this is easy.
*/
-static inline cputime_t
-timeval_to_cputime(const struct timeval *value)
+static inline cputime_t timeval_to_cputime(const struct timeval *value)
{
- return value->tv_usec * 4096 + (u64) value->tv_sec * 4096000000ULL;
+ unsigned long long ret = value->tv_sec * 4096000000ULL;
+ return (__force cputime_t)(ret + value->tv_usec * 4096ULL);
}
-static inline void
-cputime_to_timeval(const cputime_t cputime, struct timeval *value)
+static inline void cputime_to_timeval(const cputime_t cputime,
+ struct timeval *value)
{
-#ifndef __s390x__
+ unsigned long long __cputime = (__force unsigned long long) cputime;
+#ifndef CONFIG_64BIT
register_pair rp;
- rp.pair = cputime >> 1;
+ 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;
+ 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)
+static inline clock_t cputime_to_clock_t(cputime_t cputime)
{
- return cputime_div(cputime, 4096000000ULL / USER_HZ);
+ unsigned long long clock = (__force unsigned long long) cputime;
+ do_div(clock, 4096000000ULL / USER_HZ);
+ return clock;
}
-static inline cputime_t
-clock_t_to_cputime(unsigned long x)
+static inline cputime_t clock_t_to_cputime(unsigned long x)
{
- return (cputime_t) x * (4096000000ULL / USER_HZ);
+ return (__force cputime_t)(x * (4096000000ULL / USER_HZ));
}
/*
* Convert cputime64 to clock.
*/
-static inline clock_t
-cputime64_to_clock_t(cputime64_t cputime)
+static inline clock_t cputime64_to_clock_t(cputime64_t cputime)
{
- return cputime_div(cputime, 4096000000ULL / USER_HZ);
+ unsigned long long clock = (__force unsigned long long) cputime;
+ do_div(clock, 4096000000ULL / USER_HZ);
+ return clock;
}
struct s390_idle_data {
+ int nohz_delay;
unsigned int sequence;
unsigned long long idle_count;
- unsigned long long idle_enter;
unsigned long long idle_time;
- int nohz_delay;
+ unsigned long long clock_idle_enter;
+ unsigned long long clock_idle_exit;
+ unsigned long long timer_idle_enter;
+ unsigned long long timer_idle_exit;
};
DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
-void vtime_start_cpu(__u64 int_clock, __u64 enter_timer);
cputime64_t s390_get_idle_time(int cpu);
#define arch_idle_time(cpu) s390_get_idle_time(cpu)
-static inline void s390_idle_check(struct pt_regs *regs, __u64 int_clock,
- __u64 enter_timer)
-{
- if (regs->psw.mask & PSW_MASK_WAIT)
- vtime_start_cpu(int_clock, enter_timer);
-}
-
static inline int s390_nohz_delay(int cpu)
{
- return per_cpu(s390_idle, cpu).nohz_delay != 0;
+ return __get_cpu_var(s390_idle).nohz_delay != 0;
}
#define arch_needs_cpu(cpu) s390_nohz_delay(cpu)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 08:26:33 +0000