1
2#ifndef ASM_VDSO_GETTIMEOFDAY_H
3#define ASM_VDSO_GETTIMEOFDAY_H
4
5#define VDSO_HAS_TIME 1
6
7#define VDSO_HAS_CLOCK_GETRES 1
8
9#include <asm/syscall.h>
10#include <asm/timex.h>
11#include <asm/unistd.h>
12#include <linux/compiler.h>
13
14#define vdso_calc_delta __arch_vdso_calc_delta
15static __always_inline u64 __arch_vdso_calc_delta(u64 cycles, u64 last, u64 mask, u32 mult)
16{
17 return (cycles - last) * mult;
18}
19
20static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
21{
22 return _vdso_data;
23}
24
25static inline u64 __arch_get_hw_counter(s32 clock_mode, const struct vdso_data *vd)
26{
27 u64 adj, now;
28
29 now = get_tod_clock();
30 adj = vd->arch_data.tod_steering_end - now;
31 if (unlikely((s64) adj > 0))
32 now += (vd->arch_data.tod_steering_delta < 0) ? (adj >> 15) : -(adj >> 15);
33 return now;
34}
35
36static __always_inline
37long clock_gettime_fallback(clockid_t clkid, struct __kernel_timespec *ts)
38{
39 return syscall2(__NR_clock_gettime, (long)clkid, (long)ts);
40}
41
42static __always_inline
43long gettimeofday_fallback(register struct __kernel_old_timeval *tv,
44 register struct timezone *tz)
45{
46 return syscall2(__NR_gettimeofday, (long)tv, (long)tz);
47}
48
49static __always_inline
50long clock_getres_fallback(clockid_t clkid, struct __kernel_timespec *ts)
51{
52 return syscall2(__NR_clock_getres, (long)clkid, (long)ts);
53}
54
55#ifdef CONFIG_TIME_NS
56static __always_inline
57const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd)
58{
59 return _timens_data;
60}
61#endif
62
63#endif
64
