1237434Skib/*- 2291937Skib * Copyright (c) 2015 The FreeBSD Foundation 3237434Skib * 4291937Skib * This software was developed by Konstantin Belousov 5291937Skib * under sponsorship from the FreeBSD Foundation. 6291937Skib * 7237434Skib * Redistribution and use in source and binary forms, with or without 8237434Skib * modification, are permitted provided that the following conditions 9237434Skib * are met: 10237434Skib * 1. Redistributions of source code must retain the above copyright 11237434Skib * notice, this list of conditions and the following disclaimer. 12237434Skib * 2. Redistributions in binary form must reproduce the above copyright 13237434Skib * notice, this list of conditions and the following disclaimer in the 14237434Skib * documentation and/or other materials provided with the distribution. 15237434Skib * 16237434Skib * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17237434Skib * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18237434Skib * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19237434Skib * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20237434Skib * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21237434Skib * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22237434Skib * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23237434Skib * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24237434Skib * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25237434Skib * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26237434Skib * SUCH DAMAGE. 27237434Skib */ 28237434Skib 29237434Skib#include <sys/cdefs.h> 30237434Skib__FBSDID("$FreeBSD$"); 31237434Skib 32237434Skib#include <sys/types.h> 33246117Skib#include <sys/elf.h> 34237434Skib#include <sys/time.h> 35237434Skib#include <sys/vdso.h> 36237434Skib#include <machine/cpufunc.h> 37305866Skib#include <errno.h> 38246117Skib#include "libc_private.h" 39237434Skib 40291937Skibstatic inline uint64_t 41291937Skibcp15_cntvct_get(void) 42237434Skib{ 43291937Skib uint64_t reg; 44237434Skib 45291937Skib __asm __volatile("mrs %0, cntvct_el0" : "=r" (reg)); 46291937Skib return (reg); 47237434Skib} 48237434Skib 49291937Skibstatic inline uint64_t 50291937Skibcp15_cntpct_get(void) 51286284Skib{ 52291937Skib uint64_t reg; 53286284Skib 54291937Skib __asm __volatile("mrs %0, cntpct_el0" : "=r" (reg)); 55291937Skib return (reg); 56286284Skib} 57286284Skib 58246117Skib#pragma weak __vdso_gettc 59305866Skibint 60305866Skib__vdso_gettc(const struct vdso_timehands *th, u_int *tc) 61237434Skib{ 62237434Skib 63305866Skib if (th->th_algo != VDSO_TH_ALGO_ARM_GENTIM) 64305866Skib return (ENOSYS); 65291937Skib __asm __volatile("isb" : : : "memory"); 66305866Skib *tc = th->th_physical == 0 ? cp15_cntvct_get() : cp15_cntpct_get(); 67305866Skib return (0); 68237434Skib} 69246117Skib 70246117Skib#pragma weak __vdso_gettimekeep 71246117Skibint 72246117Skib__vdso_gettimekeep(struct vdso_timekeep **tk) 73246117Skib{ 74246117Skib 75246117Skib return (_elf_aux_info(AT_TIMEKEEP, tk, sizeof(*tk))); 76246117Skib} 77