1 files changed, 191 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/arch/s390/include/asm/cputime.h b/ANDROID_3.4.5/arch/s390/include/asm/cputime.h
new file mode 100644
index 00000000..24ef186a
--- /dev/null
+++ b/ANDROID_3.4.5/arch/s390/include/asm/cputime.h
@@ -0,0 +1,191 @@
+/*
+ *  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 __nocast cputime_t;
+typedef unsigned long long __nocast cputime64_t;
+
+static inline unsigned long __div(unsigned long long n, unsigned long base)
+{
+#ifndef __s390x__
+	register_pair rp;
+
+	rp.pair = n >> 1;
+	asm ("dr %0,%1" : "+d" (rp) : "d" (base >> 1));
+	return rp.subreg.odd;
+#else /* __s390x__ */
+	return n / base;
+#endif /* __s390x__ */
+}
+
+#define cputime_one_jiffy		jiffies_to_cputime(1)
+
+/*
+ * Convert cputime to jiffies and back.
+ */
+static inline unsigned long cputime_to_jiffies(const cputime_t cputime)
+{
+	return __div((__force unsigned long long) cputime, 4096000000ULL / HZ);
+}
+
+static inline cputime_t jiffies_to_cputime(const unsigned int jif)
+{
+	return (__force cputime_t)(jif * (4096000000ULL / HZ));
+}
+
+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)
+{
+	return (__force unsigned long long) cputime >> 12;
+}
+
+static inline cputime_t usecs_to_cputime(const unsigned int m)
+{
+	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)
+{
+	return __div((__force unsigned long long) cputime, 2048000000) >> 1;
+}
+
+static inline cputime_t secs_to_cputime(const unsigned int s)
+{
+	return (__force cputime_t)(s * 4096000000ULL);
+}
+
+/*
+ * Convert cputime to timespec and back.
+ */
+static inline cputime_t timespec_to_cputime(const struct timespec *value)
+{
+	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)
+{
+	unsigned long long __cputime = (__force unsigned long long) cputime;
+#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)
+{
+	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)
+{
+	unsigned long long __cputime = (__force unsigned long long) cputime;
+#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)
+{
+	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)
+{
+	return (__force cputime_t)(x * (4096000000ULL / USER_HZ));
+}
+
+/*
+ * Convert cputime64 to clock.
+ */
+static inline clock_t cputime64_to_clock_t(cputime64_t cputime)
+{
+	unsigned long long clock = (__force unsigned long long) cputime;
+	do_div(clock, 4096000000ULL / USER_HZ);
+	return clock;
+}
+
+struct s390_idle_data {
+	unsigned int sequence;
+	unsigned long long idle_count;
+	unsigned long long idle_enter;
+	unsigned long long idle_exit;
+	unsigned long long idle_time;
+	int nohz_delay;
+};
+
+DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
+
+cputime64_t s390_get_idle_time(int cpu);
+
+#define arch_idle_time(cpu) s390_get_idle_time(cpu)
+
+static inline int s390_nohz_delay(int cpu)
+{
+	return __get_cpu_var(s390_idle).nohz_delay != 0;
+}
+
+#define arch_needs_cpu(cpu) s390_nohz_delay(cpu)
+
+#endif /* _S390_CPUTIME_H */