1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef __ASM_VDSO_CSKY_GETTIMEOFDAY_H
4 #define __ASM_VDSO_CSKY_GETTIMEOFDAY_H
5 
6 #ifndef __ASSEMBLY__
7 
8 #include <asm/barrier.h>
9 #include <asm/unistd.h>
10 #include <abi/regdef.h>
11 #include <uapi/linux/time.h>
12 
13 #define VDSO_HAS_CLOCK_GETRES	1
14 
15 static __always_inline
16 int gettimeofday_fallback(struct __kernel_old_timeval *_tv,
17 			  struct timezone *_tz)
18 {
19 	register struct __kernel_old_timeval *tv asm("a0") = _tv;
20 	register struct timezone *tz asm("a1") = _tz;
21 	register long ret asm("a0");
22 	register long nr asm(syscallid) = __NR_gettimeofday;
23 
24 	asm volatile ("trap 0\n"
25 		      : "=r" (ret)
26 		      : "r"(tv), "r"(tz), "r"(nr)
27 		      : "memory");
28 
29 	return ret;
30 }
31 
32 static __always_inline
33 long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
34 {
35 	register clockid_t clkid asm("a0") = _clkid;
36 	register struct __kernel_timespec *ts asm("a1") = _ts;
37 	register long ret asm("a0");
38 	register long nr asm(syscallid) = __NR_clock_gettime64;
39 
40 	asm volatile ("trap 0\n"
41 		      : "=r" (ret)
42 		      : "r"(clkid), "r"(ts), "r"(nr)
43 		      : "memory");
44 
45 	return ret;
46 }
47 
48 static __always_inline
49 long clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
50 {
51 	register clockid_t clkid asm("a0") = _clkid;
52 	register struct old_timespec32 *ts asm("a1") = _ts;
53 	register long ret asm("a0");
54 	register long nr asm(syscallid) = __NR_clock_gettime;
55 
56 	asm volatile ("trap 0\n"
57 		      : "=r" (ret)
58 		      : "r"(clkid), "r"(ts), "r"(nr)
59 		      : "memory");
60 
61 	return ret;
62 }
63 
64 static __always_inline
65 int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
66 {
67 	register clockid_t clkid asm("a0") = _clkid;
68 	register struct __kernel_timespec *ts asm("a1") = _ts;
69 	register long ret asm("a0");
70 	register long nr asm(syscallid) = __NR_clock_getres_time64;
71 
72 	asm volatile ("trap 0\n"
73 		      : "=r" (ret)
74 		      : "r"(clkid), "r"(ts), "r"(nr)
75 		      : "memory");
76 
77 	return ret;
78 }
79 
80 static __always_inline
81 int clock_getres32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
82 {
83 	register clockid_t clkid asm("a0") = _clkid;
84 	register struct old_timespec32 *ts asm("a1") = _ts;
85 	register long ret asm("a0");
86 	register long nr asm(syscallid) = __NR_clock_getres;
87 
88 	asm volatile ("trap 0\n"
89 		      : "=r" (ret)
90 		      : "r"(clkid), "r"(ts), "r"(nr)
91 		      : "memory");
92 
93 	return ret;
94 }
95 
96 uint64_t csky_pmu_read_cc(void);
97 static __always_inline u64 __arch_get_hw_counter(s32 clock_mode,
98 						 const struct vdso_data *vd)
99 {
100 #ifdef CONFIG_CSKY_PMU_V1
101 	return csky_pmu_read_cc();
102 #else
103 	return 0;
104 #endif
105 }
106 
107 static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
108 {
109 	return _vdso_data;
110 }
111 
112 #endif /* !__ASSEMBLY__ */
113 
114 #endif /* __ASM_VDSO_CSKY_GETTIMEOFDAY_H */
115