132 lines
3.6 KiB
C
132 lines
3.6 KiB
C
/*-
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* Copyright 2012 Konstantin Belousov <kib@FreeBSD.ORG>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_VDSO_H
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#define _SYS_VDSO_H
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#include <sys/types.h>
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#include <machine/vdso.h>
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struct vdso_timehands {
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uint32_t th_algo;
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uint32_t th_gen;
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uint64_t th_scale;
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uint32_t th_offset_count;
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uint32_t th_counter_mask;
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struct bintime th_offset;
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struct bintime th_boottime;
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VDSO_TIMEHANDS_MD
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};
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struct vdso_timekeep {
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uint32_t tk_ver;
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uint32_t tk_enabled;
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uint32_t tk_current;
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struct vdso_timehands tk_th[];
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};
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#define VDSO_TK_CURRENT_BUSY 0xffffffff
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#define VDSO_TK_VER_1 0x1
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#define VDSO_TK_VER_CURR VDSO_TK_VER_1
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#define VDSO_TH_ALGO_1 0x1
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#ifndef _KERNEL
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struct timespec;
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struct timeval;
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struct timezone;
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int __vdso_clock_gettime(clockid_t clock_id, struct timespec *ts);
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int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz);
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u_int __vdso_gettc(const struct vdso_timehands *vdso_th);
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int __vdso_gettimekeep(struct vdso_timekeep **tk);
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#endif
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#ifdef _KERNEL
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struct timecounter;
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struct vdso_sv_tk {
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int sv_timekeep_off;
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int sv_timekeep_curr;
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uint32_t sv_timekeep_gen;
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};
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void timekeep_push_vdso(void);
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uint32_t tc_fill_vdso_timehands(struct vdso_timehands *vdso_th);
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/*
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* The cpu_fill_vdso_timehands() function should fill MD-part of the
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* struct vdso_timehands, which is both machine- and
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* timecounter-depended. The return value should be 1 if fast
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* userspace timecounter is enabled by hardware, and 0 otherwise. The
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* global sysctl enable override is handled by machine-independed code
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* after cpu_fill_vdso_timehands() call is made.
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*/
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uint32_t cpu_fill_vdso_timehands(struct vdso_timehands *vdso_th,
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struct timecounter *tc);
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struct vdso_sv_tk *alloc_sv_tk(void);
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#define VDSO_TH_NUM 4
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#ifdef COMPAT_FREEBSD32
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struct bintime32 {
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uint32_t sec;
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uint32_t frac[2];
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};
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struct vdso_timehands32 {
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uint32_t th_algo;
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uint32_t th_gen;
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uint32_t th_scale[2];
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uint32_t th_offset_count;
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uint32_t th_counter_mask;
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struct bintime32 th_offset;
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struct bintime32 th_boottime;
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VDSO_TIMEHANDS_MD32
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};
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struct vdso_timekeep32 {
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uint32_t tk_ver;
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uint32_t tk_enabled;
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uint32_t tk_current;
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struct vdso_timehands32 tk_th[];
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};
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uint32_t tc_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32);
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uint32_t cpu_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32,
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struct timecounter *tc);
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struct vdso_sv_tk *alloc_sv_tk_compat32(void);
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#endif
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#endif
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#endif
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