1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Author: Huacai Chen <chenhuacai@loongson.cn>
4 * Copyright (C) 2020 Loongson Technology Corporation Limited
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 */
11 #ifndef __ASM_VDSO_GETTIMEOFDAY_H
12 #define __ASM_VDSO_GETTIMEOFDAY_H
13
14 #ifndef __ASSEMBLY__
15
16 #include <asm/barrier.h>
17 #include <asm/unistd.h>
18 #include <asm/vdso/vdso.h>
19
20 #define VDSO_HAS_CLOCK_GETRES 1
21
gettimeofday_fallback(struct __kernel_old_timeval * _tv,struct timezone * _tz)22 static __always_inline long gettimeofday_fallback(
23 struct __kernel_old_timeval *_tv,
24 struct timezone *_tz)
25 {
26 register struct __kernel_old_timeval *tv asm("a0") = _tv;
27 register struct timezone *tz asm("a1") = _tz;
28 register long nr asm("a7") = __NR_gettimeofday;
29 register long ret asm("a0");
30
31 asm volatile(
32 " syscall 0\n"
33 : "+r" (ret)
34 : "r" (nr), "r" (tv), "r" (tz)
35 : "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
36 "$t8", "memory");
37
38 return ret;
39 }
40
clock_gettime_fallback(clockid_t _clkid,struct __kernel_timespec * _ts)41 static __always_inline long clock_gettime_fallback(
42 clockid_t _clkid,
43 struct __kernel_timespec *_ts)
44 {
45 register clockid_t clkid asm("a0") = _clkid;
46 register struct __kernel_timespec *ts asm("a1") = _ts;
47 register long nr asm("a7") = __NR_clock_gettime;
48 register long ret asm("a0");
49
50 asm volatile(
51 " syscall 0\n"
52 : "+r" (ret)
53 : "r" (nr), "r" (clkid), "r" (ts)
54 : "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
55 "$t8", "memory");
56
57 return ret;
58 }
59
clock_getres_fallback(clockid_t _clkid,struct __kernel_timespec * _ts)60 static __always_inline int clock_getres_fallback(
61 clockid_t _clkid,
62 struct __kernel_timespec *_ts)
63 {
64 register clockid_t clkid asm("a0") = _clkid;
65 register struct __kernel_timespec *ts asm("a1") = _ts;
66 register long nr asm("a7") = __NR_clock_getres;
67 register long ret asm("a0");
68
69 asm volatile(
70 " syscall 0\n"
71 : "+r" (ret)
72 : "r" (nr), "r" (clkid), "r" (ts)
73 : "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
74 "$t8", "memory");
75
76 return ret;
77 }
78
__arch_get_hw_counter(s32 clock_mode,const struct vdso_data * vd)79 static __always_inline u64 __arch_get_hw_counter(s32 clock_mode,
80 const struct vdso_data *vd)
81 {
82 uint64_t count;
83
84 __asm__ __volatile__(
85 " rdtime.d %0, $zero\n"
86 : "=r" (count));
87
88 return count;
89 }
90
loongarch_vdso_hres_capable(void)91 static inline bool loongarch_vdso_hres_capable(void)
92 {
93 return true;
94 }
95 #define __arch_vdso_hres_capable loongarch_vdso_hres_capable
96
__arch_get_vdso_data(void)97 static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
98 {
99 return (const struct vdso_data *)get_vdso_data();
100 }
101
102 #ifdef CONFIG_TIME_NS
__arch_get_timens_vdso_data(void)103 static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(void)
104 {
105 return (const struct vdso_data *)(get_vdso_data() + VVAR_TIMENS_PAGE_OFFSET * PAGE_SIZE);
106 }
107 #endif
108 #endif /* !__ASSEMBLY__ */
109
110 #endif /* __ASM_VDSO_GETTIMEOFDAY_H */
111