diff options
Diffstat (limited to 'include/linux/timex.h')
| -rw-r--r-- | include/linux/timex.h | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/include/linux/timex.h b/include/linux/timex.h index 8ea3e71ba7fa..fc6035d29d56 100644 --- a/include/linux/timex.h +++ b/include/linux/timex.h @@ -58,6 +58,8 @@ #include <asm/param.h> +#define NTP_API 4 /* NTP API version */ + /* * SHIFT_KG and SHIFT_KF establish the damping of the PLL and are chosen * for a slightly underdamped convergence characteristic. SHIFT_KH @@ -74,24 +76,22 @@ #define MAXTC 10 /* maximum time constant (shift) */ /* - * The SHIFT_UPDATE define establishes the decimal point of the - * time_offset variable which represents the current offset with - * respect to standard time. - * * SHIFT_USEC defines the scaling (shift) of the time_freq and * time_tolerance variables, which represent the current frequency * offset and maximum frequency tolerance. */ -#define SHIFT_UPDATE (SHIFT_HZ + 1) /* time offset scale (shift) */ #define SHIFT_USEC 16 /* frequency offset scale (shift) */ -#define SHIFT_NSEC 12 /* kernel frequency offset scale */ - -#define MAXPHASE 512000L /* max phase error (us) */ -#define MAXFREQ (512L << SHIFT_USEC) /* max frequency error (ppm) */ -#define MAXFREQ_NSEC (512000L << SHIFT_NSEC) /* max frequency error (ppb) */ +#define PPM_SCALE (NSEC_PER_USEC << (NTP_SCALE_SHIFT - SHIFT_USEC)) +#define PPM_SCALE_INV_SHIFT 20 +#define PPM_SCALE_INV ((1ll << (PPM_SCALE_INV_SHIFT + NTP_SCALE_SHIFT)) / \ + PPM_SCALE + 1) + +#define MAXPHASE 500000000l /* max phase error (ns) */ +#define MAXFREQ 500000 /* max frequency error (ns/s) */ +#define MAXFREQ_SCALED ((s64)MAXFREQ << NTP_SCALE_SHIFT) #define MINSEC 256 /* min interval between updates (s) */ #define MAXSEC 2048 /* max interval between updates (s) */ -#define NTP_PHASE_LIMIT (MAXPHASE << 5) /* beyond max. dispersion */ +#define NTP_PHASE_LIMIT ((MAXPHASE / NSEC_PER_USEC) << 5) /* beyond max. dispersion */ /* * syscall interface - used (mainly by NTP daemon) @@ -121,9 +121,11 @@ struct timex { long errcnt; /* calibration errors (ro) */ long stbcnt; /* stability limit exceeded (ro) */ + int tai; /* TAI offset (ro) */ + int :32; int :32; int :32; int :32; int :32; int :32; int :32; int :32; - int :32; int :32; int :32; int :32; + int :32; int :32; int :32; }; /* @@ -135,6 +137,9 @@ struct timex { #define ADJ_ESTERROR 0x0008 /* estimated time error */ #define ADJ_STATUS 0x0010 /* clock status */ #define ADJ_TIMECONST 0x0020 /* pll time constant */ +#define ADJ_TAI 0x0080 /* set TAI offset */ +#define ADJ_MICRO 0x1000 /* select microsecond resolution */ +#define ADJ_NANO 0x2000 /* select nanosecond resolution */ #define ADJ_TICK 0x4000 /* tick value */ #define ADJ_OFFSET_SINGLESHOT 0x8001 /* old-fashioned adjtime */ #define ADJ_OFFSET_SS_READ 0xa001 /* read-only adjtime */ @@ -146,8 +151,6 @@ struct timex { #define MOD_ESTERROR ADJ_ESTERROR #define MOD_STATUS ADJ_STATUS #define MOD_TIMECONST ADJ_TIMECONST -#define MOD_CLKB ADJ_TICK -#define MOD_CLKA ADJ_OFFSET_SINGLESHOT /* 0x8000 in original */ /* @@ -169,9 +172,13 @@ struct timex { #define STA_PPSERROR 0x0800 /* PPS signal calibration error (ro) */ #define STA_CLOCKERR 0x1000 /* clock hardware fault (ro) */ +#define STA_NANO 0x2000 /* resolution (0 = us, 1 = ns) (ro) */ +#define STA_MODE 0x4000 /* mode (0 = PLL, 1 = FLL) (ro) */ +#define STA_CLK 0x8000 /* clock source (0 = A, 1 = B) (ro) */ +/* read-only bits */ #define STA_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER | \ - STA_PPSERROR | STA_CLOCKERR) /* read-only bits */ + STA_PPSERROR | STA_CLOCKERR | STA_NANO | STA_MODE | STA_CLK) /* * Clock states (time_state) @@ -203,10 +210,9 @@ extern int time_status; /* clock synchronization status bits */ extern long time_maxerror; /* maximum error */ extern long time_esterror; /* estimated error */ -extern long time_freq; /* frequency offset (scaled ppm) */ - extern long time_adjust; /* The amount of adjtime left */ +extern void ntp_init(void); extern void ntp_clear(void); /** @@ -225,7 +231,7 @@ static inline int ntp_synced(void) __x < 0 ? -(-__x >> __s) : __x >> __s; \ }) -#define TICK_LENGTH_SHIFT 32 +#define NTP_SCALE_SHIFT 32 #ifdef CONFIG_NO_HZ #define NTP_INTERVAL_FREQ (2) @@ -234,8 +240,8 @@ static inline int ntp_synced(void) #endif #define NTP_INTERVAL_LENGTH (NSEC_PER_SEC/NTP_INTERVAL_FREQ) -/* Returns how long ticks are at present, in ns / 2^(SHIFT_SCALE-10). */ -extern u64 current_tick_length(void); +/* Returns how long ticks are at present, in ns / 2^NTP_SCALE_SHIFT. */ +extern u64 tick_length; extern void second_overflow(void); extern void update_ntp_one_tick(void); |