/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_VDSO_GETTIMEOFDAY_H #define __ASM_VDSO_GETTIMEOFDAY_H #ifndef __ASSEMBLY__ #include <asm/barrier.h> #include <asm/unistd.h> #include <asm/csr.h> #include <uapi/linux/time.h> #define VDSO_HAS_CLOCK_GETRES 1 static __always_inline int 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 ret asm("a0"); register long nr asm("a7") = __NR_gettimeofday; asm volatile ("ecall\n" : "=r" (ret) : "r"(tv), "r"(tz), "r"(nr) : "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 ret asm("a0"); register long nr asm("a7") = __NR_clock_gettime; asm volatile ("ecall\n" : "=r" (ret) : "r"(clkid), "r"(ts), "r"(nr) : "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 ret asm("a0"); register long nr asm("a7") = __NR_clock_getres; asm volatile ("ecall\n" : "=r" (ret) : "r"(clkid), "r"(ts), "r"(nr) : "memory"); return ret; } static __always_inline u64 __arch_get_hw_counter(s32 clock_mode, const struct vdso_data *vd) { /* * The purpose of csr_read(CSR_TIME) is to trap the system into * M-mode to obtain the value of CSR_TIME. Hence, unlike other * architecture, no fence instructions surround the csr_read() */ return csr_read(CSR_TIME); } static __always_inline const struct vdso_data *__arch_get_vdso_data(void) { return _vdso_data; } #endif /* !__ASSEMBLY__ */ #endif /* __ASM_VDSO_GETTIMEOFDAY_H */