1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2018 ARM Limited
5 #ifndef __ASM_VDSO_GETTIMEOFDAY_H
6 #define __ASM_VDSO_GETTIMEOFDAY_H
10 #include <asm/barrier.h>
12 #include <asm/unistd.h>
13 #include <uapi/linux/time.h>
15 #define VDSO_HAS_CLOCK_GETRES 1
17 extern struct vdso_data *__get_datapage(void);
19 static __always_inline int gettimeofday_fallback(
20 struct __kernel_old_timeval *_tv,
23 register struct timezone *tz asm("r1") = _tz;
24 register struct __kernel_old_timeval *tv asm("r0") = _tv;
25 register long ret asm ("r0");
26 register long nr asm("r7") = __NR_gettimeofday;
31 : "r" (tv), "r" (tz), "r" (nr)
37 static __always_inline long clock_gettime_fallback(
39 struct __kernel_timespec *_ts)
41 register struct __kernel_timespec *ts asm("r1") = _ts;
42 register clockid_t clkid asm("r0") = _clkid;
43 register long ret asm ("r0");
44 register long nr asm("r7") = __NR_clock_gettime64;
49 : "r" (clkid), "r" (ts), "r" (nr)
55 static __always_inline int clock_getres_fallback(
57 struct __kernel_timespec *_ts)
59 register struct __kernel_timespec *ts asm("r1") = _ts;
60 register clockid_t clkid asm("r0") = _clkid;
61 register long ret asm ("r0");
62 register long nr asm("r7") = __NR_clock_getres_time64;
67 : "r" (clkid), "r" (ts), "r" (nr)
73 static __always_inline u64 __arch_get_hw_counter(int clock_mode)
75 #ifdef CONFIG_ARM_ARCH_TIMER
79 cycle_now = read_sysreg(CNTVCT);
83 return -EINVAL; /* use fallback */
87 static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
89 return __get_datapage();
92 #endif /* !__ASSEMBLY__ */
94 #endif /* __ASM_VDSO_GETTIMEOFDAY_H */