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 <asm/vdso.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	const struct vdso_data *vdso = __arch_get_vdso_data();
28	u64 adj, now;
29
30	now = get_tod_clock();
31	adj = vdso->arch_data.tod_steering_end - now;
32	if (unlikely((s64) adj > 0))
33		now += (vdso->arch_data.tod_steering_delta < 0) ? (adj >> 15) : -(adj >> 15);
34	return now;
35}
36
37static __always_inline
38long clock_gettime_fallback(clockid_t clkid, struct __kernel_timespec *ts)
39{
40	register unsigned long r1 __asm__("r1") = __NR_clock_gettime;
41	register unsigned long r2 __asm__("r2") = (unsigned long)clkid;
42	register void *r3 __asm__("r3") = ts;
43
44	asm ("svc 0\n" : "+d" (r2) : "d" (r1), "d" (r3) : "cc", "memory");
45	return r2;
46}
47
48static __always_inline
49long gettimeofday_fallback(register struct __kernel_old_timeval *tv,
50			   register struct timezone *tz)
51{
52	register unsigned long r1 __asm__("r1") = __NR_gettimeofday;
53	register unsigned long r2 __asm__("r2") = (unsigned long)tv;
54	register void *r3 __asm__("r3") = tz;
55
56	asm ("svc 0\n" : "+d" (r2) : "d" (r1), "d" (r3) : "cc", "memory");
57	return r2;
58}
59
60static __always_inline
61long clock_getres_fallback(clockid_t clkid, struct __kernel_timespec *ts)
62{
63	register unsigned long r1 __asm__("r1") = __NR_clock_getres;
64	register unsigned long r2 __asm__("r2") = (unsigned long)clkid;
65	register void *r3 __asm__("r3") = ts;
66
67	asm ("svc 0\n" : "+d" (r2) : "d" (r1), "d" (r3) : "cc", "memory");
68	return r2;
69}
70
71#endif
72