diff options
Diffstat (limited to 'include/linux/timekeeper_internal.h')
-rw-r--r-- | include/linux/timekeeper_internal.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h new file mode 100644 index 0000000..8ba43fa --- /dev/null +++ b/include/linux/timekeeper_internal.h @@ -0,0 +1,68 @@ +/* + * 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; +}; +#endif /* _LINUX_TIMEKEEPER_INTERNAL_H */ |