2 * You SHOULD NOT be including this unless you're vsyscall
3 * handling code or timekeeping internal code!
6 #ifndef _LINUX_TIMEKEEPER_INTERNAL_H
7 #define _LINUX_TIMEKEEPER_INTERNAL_H
9 #include <linux/clocksource.h>
10 #include <linux/jiffies.h>
11 #include <linux/time.h>
13 /* Structure holding internal timekeeping values. */
15 /* Current clocksource used for timekeeping. */
16 struct clocksource
*clock
;
17 /* NTP adjusted clock multiplier */
19 /* The shift value of the current clocksource. */
21 /* Number of clock cycles in one NTP interval. */
22 cycle_t cycle_interval
;
23 /* Number of clock shifted nano seconds in one NTP interval. */
25 /* shifted nano seconds left over when rounding cycle_interval */
27 /* Raw nano seconds accumulated per NTP interval. */
30 /* Current CLOCK_REALTIME time in seconds */
32 /* Clock shifted nano seconds */
35 /* Difference between accumulated time and NTP time in ntp
36 * shifted nano seconds. */
38 /* Shift conversion between clock shifted nano seconds and
39 * ntp shifted nano seconds. */
43 * wall_to_monotonic is what we need to add to xtime (or xtime corrected
44 * for sub jiffie times) to get to monotonic time. Monotonic is pegged
45 * at zero at system boot time, so wall_to_monotonic will be negative,
46 * however, we will ALWAYS keep the tv_nsec part positive so we can use
47 * the usual normalization.
49 * wall_to_monotonic is moved after resume from suspend for the
50 * monotonic time not to jump. We need to add total_sleep_time to
51 * wall_to_monotonic to get the real boot based time offset.
53 * - wall_to_monotonic is no longer the boot time, getboottime must be
56 struct timespec wall_to_monotonic
;
57 /* Offset clock monotonic -> clock realtime */
59 /* time spent in suspend */
60 struct timespec total_sleep_time
;
61 /* Offset clock monotonic -> clock boottime */
63 /* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */
64 struct timespec raw_time
;
65 /* Seqlock for all timekeeper values */
69 static inline struct timespec
tk_xtime(struct timekeeper
*tk
)
73 ts
.tv_sec
= tk
->xtime_sec
;
74 ts
.tv_nsec
= (long)(tk
->xtime_nsec
>> tk
->shift
);
79 #ifdef CONFIG_GENERIC_TIME_VSYSCALL
81 extern void update_vsyscall(struct timekeeper
*tk
);
82 extern void update_vsyscall_tz(void);
84 #elif defined(CONFIG_GENERIC_TIME_VSYSCALL_OLD)
86 extern void update_vsyscall_old(struct timespec
*ts
, struct timespec
*wtm
,
87 struct clocksource
*c
, u32 mult
);
88 extern void update_vsyscall_tz(void);
90 static inline void update_vsyscall(struct timekeeper
*tk
)
95 update_vsyscall_old(&xt
, &tk
->wall_to_monotonic
, tk
->clock
, tk
->mult
);
100 static inline void update_vsyscall(struct timekeeper
*tk
)
103 static inline void update_vsyscall_tz(void)
108 #endif /* _LINUX_TIMEKEEPER_INTERNAL_H */