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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | /* SPDX-License-Identifier: GPL-2.0 */ /* * Author: Huacai Chen <chenhuacai@loongson.cn> * * Copyright (C) 2020-2022 Loongson Technology Corporation Limited */ #ifndef __ASM_VDSO_GETTIMEOFDAY_H #define __ASM_VDSO_GETTIMEOFDAY_H #ifndef __ASSEMBLY__ #include <asm/unistd.h> #include <asm/vdso/vdso.h> #define VDSO_HAS_CLOCK_GETRES 1 static __always_inline long gettimeofday_fallback( struct __kernel_old_timeval *_tv, struct timezone *_tz) { register struct __kernel_old_timeval *tv asm("a0") = _tv; register struct timezone *tz asm("a1") = _tz; register long nr asm("a7") = __NR_gettimeofday; register long ret asm("a0"); asm volatile( " syscall 0\n" : "+r" (ret) : "r" (nr), "r" (tv), "r" (tz) : "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", "memory"); return ret; } static __always_inline long clock_gettime_fallback( clockid_t _clkid, struct __kernel_timespec *_ts) { register clockid_t clkid asm("a0") = _clkid; register struct __kernel_timespec *ts asm("a1") = _ts; register long nr asm("a7") = __NR_clock_gettime; register long ret asm("a0"); asm volatile( " syscall 0\n" : "+r" (ret) : "r" (nr), "r" (clkid), "r" (ts) : "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", "memory"); return ret; } static __always_inline int clock_getres_fallback( clockid_t _clkid, struct __kernel_timespec *_ts) { register clockid_t clkid asm("a0") = _clkid; register struct __kernel_timespec *ts asm("a1") = _ts; register long nr asm("a7") = __NR_clock_getres; register long ret asm("a0"); asm volatile( " syscall 0\n" : "+r" (ret) : "r" (nr), "r" (clkid), "r" (ts) : "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", "memory"); return ret; } static __always_inline u64 __arch_get_hw_counter(s32 clock_mode, const struct vdso_data *vd) { uint64_t count; __asm__ __volatile__( " rdtime.d %0, $zero\n" : "=r" (count)); return count; } static inline bool loongarch_vdso_hres_capable(void) { return true; } #define __arch_vdso_hres_capable loongarch_vdso_hres_capable static __always_inline const struct vdso_data *__arch_get_vdso_data(void) { return (const struct vdso_data *)get_vdso_data(); } #ifdef CONFIG_TIME_NS static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd) { return (const struct vdso_data *)(get_vdso_data() + VVAR_TIMENS_PAGE_OFFSET * PAGE_SIZE); } #endif #endif /* !__ASSEMBLY__ */ #endif /* __ASM_VDSO_GETTIMEOFDAY_H */ |