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Commit | Line | Data |
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d7b4202e JS |
1 | /* |
2 | * You SHOULD NOT be including this unless you're vsyscall | |
3 | * handling code or timekeeping internal code! | |
4 | */ | |
5 | ||
6 | #ifndef _LINUX_TIMEKEEPER_INTERNAL_H | |
7 | #define _LINUX_TIMEKEEPER_INTERNAL_H | |
8 | ||
9 | #include <linux/clocksource.h> | |
10 | #include <linux/jiffies.h> | |
11 | #include <linux/time.h> | |
12 | ||
3fdb14fd TG |
13 | /* |
14 | * Structure holding internal timekeeping values. | |
15 | * | |
16 | * Note: wall_to_monotonic is what we need to add to xtime (or xtime | |
17 | * corrected for sub jiffie times) to get to monotonic time. | |
18 | * Monotonic is pegged at zero at system boot time, so | |
19 | * wall_to_monotonic will be negative, however, we will ALWAYS keep | |
20 | * the tv_nsec part positive so we can use the usual normalization. | |
21 | * | |
22 | * wall_to_monotonic is moved after resume from suspend for the | |
23 | * monotonic time not to jump. We need to add total_sleep_time to | |
24 | * wall_to_monotonic to get the real boot based time offset. | |
25 | * | |
26 | * - wall_to_monotonic is no longer the boot time, getboottime must be | |
27 | * used instead. | |
28 | */ | |
d7b4202e JS |
29 | struct timekeeper { |
30 | /* Current clocksource used for timekeeping. */ | |
31 | struct clocksource *clock; | |
32 | /* NTP adjusted clock multiplier */ | |
33 | u32 mult; | |
34 | /* The shift value of the current clocksource. */ | |
35 | u32 shift; | |
3fdb14fd TG |
36 | /* Clock shifted nano seconds */ |
37 | u64 xtime_nsec; | |
38 | ||
39 | /* Current CLOCK_REALTIME time in seconds */ | |
40 | u64 xtime_sec; | |
41 | /* CLOCK_REALTIME to CLOCK_MONOTONIC offset */ | |
42 | struct timespec64 wall_to_monotonic; | |
43 | ||
44 | /* Offset clock monotonic -> clock realtime */ | |
45 | ktime_t offs_real; | |
46 | /* Offset clock monotonic -> clock boottime */ | |
47 | ktime_t offs_boot; | |
48 | /* Offset clock monotonic -> clock tai */ | |
49 | ktime_t offs_tai; | |
50 | ||
51 | /* time spent in suspend */ | |
52 | struct timespec64 total_sleep_time; | |
53 | /* The current UTC to TAI offset in seconds */ | |
54 | s32 tai_offset; | |
55 | ||
56 | /* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */ | |
57 | struct timespec64 raw_time; | |
58 | ||
d7b4202e JS |
59 | /* Number of clock cycles in one NTP interval. */ |
60 | cycle_t cycle_interval; | |
14a3b6ab TG |
61 | /* Last cycle value (also stored in clock->cycle_last) */ |
62 | cycle_t cycle_last; | |
d7b4202e JS |
63 | /* Number of clock shifted nano seconds in one NTP interval. */ |
64 | u64 xtime_interval; | |
65 | /* shifted nano seconds left over when rounding cycle_interval */ | |
66 | s64 xtime_remainder; | |
67 | /* Raw nano seconds accumulated per NTP interval. */ | |
68 | u32 raw_interval; | |
69 | ||
3fdb14fd TG |
70 | /* |
71 | * Difference between accumulated time and NTP time in ntp | |
72 | * shifted nano seconds. | |
73 | */ | |
d7b4202e | 74 | s64 ntp_error; |
d7b4202e | 75 | /* |
3fdb14fd TG |
76 | * Shift conversion between clock shifted nano seconds and |
77 | * ntp shifted nano seconds. | |
d7b4202e | 78 | */ |
3fdb14fd | 79 | u32 ntp_error_shift; |
d7b4202e | 80 | }; |
189374ae | 81 | |
576094b7 JS |
82 | #ifdef CONFIG_GENERIC_TIME_VSYSCALL |
83 | ||
84 | extern void update_vsyscall(struct timekeeper *tk); | |
85 | extern void update_vsyscall_tz(void); | |
189374ae | 86 | |
576094b7 JS |
87 | #elif defined(CONFIG_GENERIC_TIME_VSYSCALL_OLD) |
88 | ||
89 | extern void update_vsyscall_old(struct timespec *ts, struct timespec *wtm, | |
90 | struct clocksource *c, u32 mult); | |
189374ae | 91 | extern void update_vsyscall_tz(void); |
576094b7 | 92 | |
189374ae | 93 | #else |
576094b7 JS |
94 | |
95 | static inline void update_vsyscall(struct timekeeper *tk) | |
189374ae JS |
96 | { |
97 | } | |
98 | static inline void update_vsyscall_tz(void) | |
99 | { | |
100 | } | |
101 | #endif | |
102 | ||
d7b4202e | 103 | #endif /* _LINUX_TIMEKEEPER_INTERNAL_H */ |