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