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- /*
- * You SHOULD NOT be including this unless you're vsyscall
- * handling code or timekeeping internal code!
- */
- #ifndef _LINUX_TIMEKEEPER_INTERNAL_H
- #define _LINUX_TIMEKEEPER_INTERNAL_H
- #include <linux/clocksource.h>
- #include <linux/jiffies.h>
- #include <linux/time.h>
- /* Structure holding internal timekeeping values. */
- struct timekeeper {
- /* Current clocksource used for timekeeping. */
- struct clocksource *clock;
- /* NTP adjusted clock multiplier */
- u32 mult;
- /* The shift value of the current clocksource. */
- u32 shift;
- /* Number of clock cycles in one NTP interval. */
- cycle_t cycle_interval;
- /* Number of clock shifted nano seconds in one NTP interval. */
- u64 xtime_interval;
- /* shifted nano seconds left over when rounding cycle_interval */
- s64 xtime_remainder;
- /* Raw nano seconds accumulated per NTP interval. */
- u32 raw_interval;
- /* Current CLOCK_REALTIME time in seconds */
- u64 xtime_sec;
- /* Clock shifted nano seconds */
- u64 xtime_nsec;
- /* Difference between accumulated time and NTP time in ntp
- * shifted nano seconds. */
- s64 ntp_error;
- /* Shift conversion between clock shifted nano seconds and
- * ntp shifted nano seconds. */
- u32 ntp_error_shift;
- /*
- * wall_to_monotonic is what we need to add to xtime (or xtime corrected
- * for sub jiffie times) to get to monotonic time. Monotonic is pegged
- * at zero at system boot time, so wall_to_monotonic will be negative,
- * however, we will ALWAYS keep the tv_nsec part positive so we can use
- * the usual normalization.
- *
- * wall_to_monotonic is moved after resume from suspend for the
- * monotonic time not to jump. We need to add total_sleep_time to
- * wall_to_monotonic to get the real boot based time offset.
- *
- * - wall_to_monotonic is no longer the boot time, getboottime must be
- * used instead.
- */
- struct timespec wall_to_monotonic;
- /* Offset clock monotonic -> clock realtime */
- ktime_t offs_real;
- /* time spent in suspend */
- struct timespec total_sleep_time;
- /* Offset clock monotonic -> clock boottime */
- ktime_t offs_boot;
- /* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */
- struct timespec raw_time;
- /* Seqlock for all timekeeper values */
- seqlock_t lock;
- };
- #ifdef CONFIG_GENERIC_TIME_VSYSCALL
- extern void
- update_vsyscall(struct timespec *ts, struct timespec *wtm,
- struct clocksource *c, u32 mult);
- extern void update_vsyscall_tz(void);
- #else
- static inline void update_vsyscall(struct timespec *ts, struct timespec *wtm,
- struct clocksource *c, u32 mult)
- {
- }
- static inline void update_vsyscall_tz(void)
- {
- }
- #endif
- #endif /* _LINUX_TIMEKEEPER_INTERNAL_H */
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