1 /* SPDX-License-Identifier: GPL-2.0 */ 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 15 static __always_inline u64 __arch_vdso_calc_delta(u64 cycles, u64 last, u64 mask, u32 mult) 16 { 17 return (cycles - last) * mult; 18 } 19 20 static __always_inline const struct vdso_data *__arch_get_vdso_data(void) 21 { 22 return _vdso_data; 23 } 24 25 static 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 36 static __always_inline 37 long clock_gettime_fallback(clockid_t clkid, struct __kernel_timespec *ts) 38 { 39 return syscall2(__NR_clock_gettime, (long)clkid, (long)ts); 40 } 41 42 static __always_inline 43 long 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 49 static __always_inline 50 long 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 56 static __always_inline 57 const 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