From d7b4202e0581683f1a14fe598633da0067f5241e Mon Sep 17 00:00:00 2001 From: John Stultz Date: Tue, 4 Sep 2012 15:12:07 -0400 Subject: time: Move timekeeper structure to timekeeper_internal.h for vsyscall changes We're going to need to access the timekeeper in update_vsyscall, so make the structure available for those who need it. Cc: Tony Luck Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Cc: Andy Lutomirski Cc: Martin Schwidefsky Cc: Paul Turner Cc: Steven Rostedt Cc: Richard Cochran Cc: Prarit Bhargava Cc: Thomas Gleixner Signed-off-by: John Stultz --- include/linux/timekeeper_internal.h | 68 +++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 include/linux/timekeeper_internal.h (limited to 'include/linux/timekeeper_internal.h') diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h new file mode 100644 index 00000000000..8ba43fa8c7e --- /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 +#include +#include + +/* 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 */ -- cgit v1.2.3-70-g09d2