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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Author: Huacai Chen <[email protected]>
*
* 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 */
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