FreeBSD/Linux Kernel Cross Reference
sys/x86/include/vdso.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright 2012 Konstantin Belousov <kib@FreeBSD.ORG>.
      * Copyright 2016 The FreeBSD Foundation.
      * All rights reserved.
      *
      * Portions of this software were 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 ``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 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.
     *
     * $FreeBSD: releng/12.0/sys/x86/include/vdso.h 326263 2017-11-27 15:11:47Z pfg $
     */
    
    #ifndef _X86_VDSO_H
    #define _X86_VDSO_H
    
    #define VDSO_TIMEHANDS_MD                       \
            uint32_t        th_x86_shift;           \
            uint32_t        th_x86_hpet_idx;        \
            uint32_t        th_res[6];
    
    #define VDSO_TH_ALGO_X86_TSC    VDSO_TH_ALGO_1
    #define VDSO_TH_ALGO_X86_HPET   VDSO_TH_ALGO_2
    #define VDSO_TH_ALGO_X86_HVTSC  VDSO_TH_ALGO_3  /* Hyper-V ref. TSC */
    
    #ifdef _KERNEL
    #ifdef COMPAT_FREEBSD32
    
    #define VDSO_TIMEHANDS_MD32     VDSO_TIMEHANDS_MD
    
    #endif
    #endif
    #endif

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