mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-22 18:56:38 +00:00
0d6cc87b18
Reviewed by: kib, emaste, imp Pull Request: https://github.com/freebsd/freebsd-src/pull/908
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
/*-
|
|
* Copyright (c) 2015 The FreeBSD Foundation
|
|
*
|
|
* This software was developed by Konstantin Belousov
|
|
* under sponsorship from the FreeBSD Foundation.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/elf.h>
|
|
#include <sys/time.h>
|
|
#include <sys/vdso.h>
|
|
#include <machine/cpufunc.h>
|
|
#include <errno.h>
|
|
#include "libc_private.h"
|
|
|
|
static inline uint64_t
|
|
cp15_cntvct_get(void)
|
|
{
|
|
uint64_t reg;
|
|
|
|
__asm __volatile("mrs %0, cntvct_el0" : "=r" (reg));
|
|
return (reg);
|
|
}
|
|
|
|
static inline uint64_t
|
|
cp15_cntpct_get(void)
|
|
{
|
|
uint64_t reg;
|
|
|
|
__asm __volatile("mrs %0, cntpct_el0" : "=r" (reg));
|
|
return (reg);
|
|
}
|
|
|
|
#pragma weak __vdso_gettc
|
|
int
|
|
__vdso_gettc(const struct vdso_timehands *th, u_int *tc)
|
|
{
|
|
|
|
if (th->th_algo != VDSO_TH_ALGO_ARM_GENTIM)
|
|
return (ENOSYS);
|
|
__asm __volatile("isb" : : : "memory");
|
|
*tc = th->th_physical == 0 ? cp15_cntvct_get() : cp15_cntpct_get();
|
|
return (0);
|
|
}
|
|
|
|
#pragma weak __vdso_gettimekeep
|
|
int
|
|
__vdso_gettimekeep(struct vdso_timekeep **tk)
|
|
{
|
|
|
|
return (_elf_aux_info(AT_TIMEKEEP, tk, sizeof(*tk)));
|
|
}
|