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/timex.h> 10 #include <asm/unistd.h> 11 #include <linux/compiler.h> 12 13 #define vdso_calc_delta __arch_vdso_calc_delta 14 static __always_inline u64 __arch_vdso_calc_delta(u64 cycles, u64 last, u64 mask, u32 mult) 15 { 16 return (cycles - last) * mult; 17 } 18 19 static __always_inline const struct vdso_data *__arch_get_vdso_data(void) 20 { 21 return _vdso_data; 22 } 23 24 static inline u64 __arch_get_hw_counter(s32 clock_mode, const struct vdso_data *vd) 25 { 26 u64 adj, now; 27 28 now = get_tod_clock(); 29 adj = vd->arch_data.tod_steering_end - now; 30 if (unlikely((s64) adj > 0)) 31 now += (vd->arch_data.tod_steering_delta < 0) ? (adj >> 15) : -(adj >> 15); 32 return now; 33 } 34 35 static __always_inline 36 long clock_gettime_fallback(clockid_t clkid, struct __kernel_timespec *ts) 37 { 38 register unsigned long r1 __asm__("r1") = __NR_clock_gettime; 39 register unsigned long r2 __asm__("r2") = (unsigned long)clkid; 40 register void *r3 __asm__("r3") = ts; 41 42 asm ("svc 0\n" : "+d" (r2) : "d" (r1), "d" (r3) : "cc", "memory"); 43 return r2; 44 } 45 46 static __always_inline 47 long gettimeofday_fallback(register struct __kernel_old_timeval *tv, 48 register struct timezone *tz) 49 { 50 register unsigned long r1 __asm__("r1") = __NR_gettimeofday; 51 register unsigned long r2 __asm__("r2") = (unsigned long)tv; 52 register void *r3 __asm__("r3") = tz; 53 54 asm ("svc 0\n" : "+d" (r2) : "d" (r1), "d" (r3) : "cc", "memory"); 55 return r2; 56 } 57 58 static __always_inline 59 long clock_getres_fallback(clockid_t clkid, struct __kernel_timespec *ts) 60 { 61 register unsigned long r1 __asm__("r1") = __NR_clock_getres; 62 register unsigned long r2 __asm__("r2") = (unsigned long)clkid; 63 register void *r3 __asm__("r3") = ts; 64 65 asm ("svc 0\n" : "+d" (r2) : "d" (r1), "d" (r3) : "cc", "memory"); 66 return r2; 67 } 68 69 #ifdef CONFIG_TIME_NS 70 static __always_inline 71 const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd) 72 { 73 return _timens_data; 74 } 75 #endif 76 77 #endif 78