| /* 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 get_vdso_data(); |
| } |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* __ASM_VDSO_GETTIMEOFDAY_H */ |