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