1 files changed, 176 insertions, 0 deletions

diff --git a/include/asm-s390/cputime.h b/include/asm-s390/cputime.h
new file mode 100644
index 000000000000..4b3ef7cad115
--- /dev/null
+++ b/include/asm-s390/cputime.h
@@ -0,0 +1,176 @@
+/*
+ *  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 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 */