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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 | ||
13 | /* Structure holding internal timekeeping values. */ | |
14 | struct timekeeper { | |
15 | /* Current clocksource used for timekeeping. */ | |
16 | struct clocksource *clock; | |
17 | /* NTP adjusted clock multiplier */ | |
18 | u32 mult; | |
19 | /* The shift value of the current clocksource. */ | |
20 | u32 shift; | |
21 | /* Number of clock cycles in one NTP interval. */ | |
22 | cycle_t cycle_interval; | |
14a3b6ab TG |
23 | /* Last cycle value (also stored in clock->cycle_last) */ |
24 | cycle_t cycle_last; | |
d7b4202e JS |
25 | /* Number of clock shifted nano seconds in one NTP interval. */ |
26 | u64 xtime_interval; | |
27 | /* shifted nano seconds left over when rounding cycle_interval */ | |
28 | s64 xtime_remainder; | |
29 | /* Raw nano seconds accumulated per NTP interval. */ | |
30 | u32 raw_interval; | |
31 | ||
32 | /* Current CLOCK_REALTIME time in seconds */ | |
33 | u64 xtime_sec; | |
34 | /* Clock shifted nano seconds */ | |
35 | u64 xtime_nsec; | |
36 | ||
37 | /* Difference between accumulated time and NTP time in ntp | |
38 | * shifted nano seconds. */ | |
39 | s64 ntp_error; | |
40 | /* Shift conversion between clock shifted nano seconds and | |
41 | * ntp shifted nano seconds. */ | |
42 | u32 ntp_error_shift; | |
43 | ||
44 | /* | |
45 | * wall_to_monotonic is what we need to add to xtime (or xtime corrected | |
46 | * for sub jiffie times) to get to monotonic time. Monotonic is pegged | |
47 | * at zero at system boot time, so wall_to_monotonic will be negative, | |
48 | * however, we will ALWAYS keep the tv_nsec part positive so we can use | |
49 | * the usual normalization. | |
50 | * | |
51 | * wall_to_monotonic is moved after resume from suspend for the | |
52 | * monotonic time not to jump. We need to add total_sleep_time to | |
53 | * wall_to_monotonic to get the real boot based time offset. | |
54 | * | |
55 | * - wall_to_monotonic is no longer the boot time, getboottime must be | |
56 | * used instead. | |
57 | */ | |
58 | struct timespec wall_to_monotonic; | |
59 | /* Offset clock monotonic -> clock realtime */ | |
60 | ktime_t offs_real; | |
61 | /* time spent in suspend */ | |
62 | struct timespec total_sleep_time; | |
63 | /* Offset clock monotonic -> clock boottime */ | |
64 | ktime_t offs_boot; | |
65 | /* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */ | |
66 | struct timespec raw_time; | |
cc244dda JS |
67 | /* The current UTC to TAI offset in seconds */ |
68 | s32 tai_offset; | |
90adda98 JS |
69 | /* Offset clock monotonic -> clock tai */ |
70 | ktime_t offs_tai; | |
cc244dda | 71 | |
d7b4202e | 72 | }; |
189374ae | 73 | |
576094b7 JS |
74 | static inline struct timespec tk_xtime(struct timekeeper *tk) |
75 | { | |
76 | struct timespec ts; | |
77 | ||
78 | ts.tv_sec = tk->xtime_sec; | |
79 | ts.tv_nsec = (long)(tk->xtime_nsec >> tk->shift); | |
80 | return ts; | |
81 | } | |
82 | ||
83 | ||
84 | #ifdef CONFIG_GENERIC_TIME_VSYSCALL | |
85 | ||
86 | extern void update_vsyscall(struct timekeeper *tk); | |
87 | extern void update_vsyscall_tz(void); | |
189374ae | 88 | |
576094b7 JS |
89 | #elif defined(CONFIG_GENERIC_TIME_VSYSCALL_OLD) |
90 | ||
91 | extern void update_vsyscall_old(struct timespec *ts, struct timespec *wtm, | |
92 | struct clocksource *c, u32 mult); | |
189374ae | 93 | extern void update_vsyscall_tz(void); |
576094b7 JS |
94 | |
95 | static inline void update_vsyscall(struct timekeeper *tk) | |
96 | { | |
97 | struct timespec xt; | |
98 | ||
99 | xt = tk_xtime(tk); | |
100 | update_vsyscall_old(&xt, &tk->wall_to_monotonic, tk->clock, tk->mult); | |
101 | } | |
102 | ||
189374ae | 103 | #else |
576094b7 JS |
104 | |
105 | static inline void update_vsyscall(struct timekeeper *tk) | |
189374ae JS |
106 | { |
107 | } | |
108 | static inline void update_vsyscall_tz(void) | |
109 | { | |
110 | } | |
111 | #endif | |
112 | ||
d7b4202e | 113 | #endif /* _LINUX_TIMEKEEPER_INTERNAL_H */ |