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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2018 ARM Limited
*/
#ifndef __ASM_VDSO_GETTIMEOFDAY_H
#define __ASM_VDSO_GETTIMEOFDAY_H
#ifndef __ASSEMBLY__
#include <asm/barrier.h>
#include <asm/cp15.h>
#include <asm/unistd.h>
#include <uapi/linux/time.h>
#define VDSO_HAS_CLOCK_GETRES 1
extern struct vdso_data *__get_datapage(void);
static __always_inline int gettimeofday_fallback(
struct __kernel_old_timeval *_tv,
struct timezone *_tz)
{
register struct timezone *tz asm("r1") = _tz;
register struct __kernel_old_timeval *tv asm("r0") = _tv;
register long ret asm ("r0");
register long nr asm("r7") = __NR_gettimeofday;
asm volatile(
" swi #0\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 struct __kernel_timespec *ts asm("r1") = _ts;
register clockid_t clkid asm("r0") = _clkid;
register long ret asm ("r0");
register long nr asm("r7") = __NR_clock_gettime64;
asm volatile(
" swi #0\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 struct __kernel_timespec *ts asm("r1") = _ts;
register clockid_t clkid asm("r0") = _clkid;
register long ret asm ("r0");
register long nr asm("r7") = __NR_clock_getres_time64;
asm volatile(
" swi #0\n"
: "=r" (ret)
: "r" (clkid), "r" (ts), "r" (nr)
: "memory");
return ret;
}
static __always_inline u64 __arch_get_hw_counter(int clock_mode)
{
#ifdef CONFIG_ARM_ARCH_TIMER
u64 cycle_now;
if (!clock_mode)
return -EINVAL;
isb();
cycle_now = read_sysreg(CNTVCT);
return cycle_now;
#else
return -EINVAL; /* use fallback */
#endif
}
static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
{
return __get_datapage();
}
#endif /* !__ASSEMBLY__ */
#endif /* __ASM_VDSO_GETTIMEOFDAY_H */
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