#include <linux/timex.h>
#include <linux/time.h>
#include <linux/list.h>
+#include <linux/timer.h>
#include <asm/div64.h>
#include <asm/io.h>
/* clocksource cycle base type */
typedef u64 cycle_t;
+struct clocksource;
/**
* struct clocksource - hardware abstraction for a free running counter
* @mult: cycle to nanosecond multiplier
* @shift: cycle to nanosecond divisor (power of two)
* @flags: flags describing special properties
+ * @vread: vsyscall based read
* @cycle_interval: Used internally by timekeeping core, please ignore.
* @xtime_interval: Used internally by timekeeping core, please ignore.
*/
u32 mult;
u32 shift;
unsigned long flags;
+ cycle_t (*vread)(void);
/* timekeeping specific data, ignore */
cycle_t cycle_last, cycle_interval;
u64 xtime_nsec, xtime_interval;
s64 error;
+
+#ifdef CONFIG_CLOCKSOURCE_WATCHDOG
+ /* Watchdog related data, used by the framework */
+ struct list_head wd_list;
+ cycle_t wd_last;
+#endif
};
/*
* Clock source flags bits::
*/
-#define CLOCK_SOURCE_IS_CONTINUOUS 0x01
-#define CLOCK_SOURCE_MUST_VERIFY 0x02
+#define CLOCK_SOURCE_IS_CONTINUOUS 0x01
+#define CLOCK_SOURCE_MUST_VERIFY 0x02
+
+#define CLOCK_SOURCE_WATCHDOG 0x10
+#define CLOCK_SOURCE_VALID_FOR_HRES 0x20
/* simplify initialization of mask field */
#define CLOCKSOURCE_MASK(bits) (cycle_t)(bits<64 ? ((1ULL<<bits)-1) : -1)
extern struct clocksource* clocksource_get_next(void);
extern void clocksource_change_rating(struct clocksource *cs, int rating);
+#ifdef CONFIG_GENERIC_TIME_VSYSCALL
+extern void update_vsyscall(struct timespec *ts, struct clocksource *c);
+#else
+static inline void update_vsyscall(struct timespec *ts, struct clocksource *c)
+{
+}
+#endif
+
#endif /* _LINUX_CLOCKSOURCE_H */