mirror of
https://github.com/Fishwaldo/linux-bl808.git
synced 2025-03-30 10:55:03 +00:00
7d489d15ce
Convert the core timekeeping logic to use timespec64s. This moves the 2038 issues out of the core logic and into all of the accessor functions. Future changes will need to push the timespec64s out to all timekeeping users, but that can be done interface by interface. Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
/*
|
|
* 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;
|
|
/* Last cycle value (also stored in clock->cycle_last) */
|
|
cycle_t cycle_last;
|
|
/* 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 timespec64 wall_to_monotonic;
|
|
/* Offset clock monotonic -> clock realtime */
|
|
ktime_t offs_real;
|
|
/* time spent in suspend */
|
|
struct timespec64 total_sleep_time;
|
|
/* Offset clock monotonic -> clock boottime */
|
|
ktime_t offs_boot;
|
|
/* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */
|
|
struct timespec64 raw_time;
|
|
/* The current UTC to TAI offset in seconds */
|
|
s32 tai_offset;
|
|
/* Offset clock monotonic -> clock tai */
|
|
ktime_t offs_tai;
|
|
|
|
};
|
|
|
|
static inline struct timespec64 tk_xtime(struct timekeeper *tk)
|
|
{
|
|
struct timespec64 ts;
|
|
|
|
ts.tv_sec = tk->xtime_sec;
|
|
ts.tv_nsec = (long)(tk->xtime_nsec >> tk->shift);
|
|
return ts;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_GENERIC_TIME_VSYSCALL
|
|
|
|
extern void update_vsyscall(struct timekeeper *tk);
|
|
extern void update_vsyscall_tz(void);
|
|
|
|
#elif defined(CONFIG_GENERIC_TIME_VSYSCALL_OLD)
|
|
|
|
extern void update_vsyscall_old(struct timespec *ts, struct timespec *wtm,
|
|
struct clocksource *c, u32 mult);
|
|
extern void update_vsyscall_tz(void);
|
|
|
|
static inline void update_vsyscall(struct timekeeper *tk)
|
|
{
|
|
struct timespec xt;
|
|
|
|
xt = tk_xtime(tk);
|
|
update_vsyscall_old(&xt, &tk->wall_to_monotonic, tk->clock, tk->mult);
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void update_vsyscall(struct timekeeper *tk)
|
|
{
|
|
}
|
|
static inline void update_vsyscall_tz(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LINUX_TIMEKEEPER_INTERNAL_H */
|