1 /*- 2 * Copyright 2012 Konstantin Belousov <kib@FreeBSD.ORG>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #ifndef _SYS_VDSO_H 29 #define _SYS_VDSO_H 30 31 #include <sys/types.h> 32 #include <machine/vdso.h> 33 34 struct vdso_timehands { 35 uint32_t th_algo; 36 uint32_t th_gen; 37 uint64_t th_scale; 38 uint32_t th_offset_count; 39 uint32_t th_counter_mask; 40 struct bintime th_offset; 41 struct bintime th_boottime; 42 VDSO_TIMEHANDS_MD 43 }; 44 45 struct vdso_timekeep { 46 uint32_t tk_ver; 47 uint32_t tk_enabled; 48 uint32_t tk_current; 49 struct vdso_timehands tk_th[]; 50 }; 51 52 #define VDSO_TK_CURRENT_BUSY 0xffffffff 53 #define VDSO_TK_VER_1 0x1 54 #define VDSO_TK_VER_CURR VDSO_TK_VER_1 55 #define VDSO_TH_ALGO_1 0x1 56 57 #ifndef _KERNEL 58 59 struct timespec; 60 struct timeval; 61 struct timezone; 62 63 int __vdso_clock_gettime(clockid_t clock_id, struct timespec *ts); 64 int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz); 65 u_int __vdso_gettc(const struct vdso_timehands *vdso_th); 66 int __vdso_gettimekeep(struct vdso_timekeep **tk); 67 68 #endif 69 70 #ifdef _KERNEL 71 72 void timekeep_push_vdso(void); 73 74 uint32_t tc_fill_vdso_timehands(struct vdso_timehands *vdso_th); 75 76 /* 77 * The cpu_fill_vdso_timehands() function should fill MD-part of the 78 * struct vdso_timehands, which is both machine- and 79 * timecounter-depended. The return value should be 1 if fast 80 * userspace timecounter is enabled by hardware, and 0 otherwise. The 81 * global sysctl enable override is handled by machine-independed code 82 * after cpu_fill_vdso_timehands() call is made. 83 */ 84 uint32_t cpu_fill_vdso_timehands(struct vdso_timehands *vdso_th); 85 86 #define VDSO_TH_NUM 4 87 88 #ifdef COMPAT_FREEBSD32 89 struct bintime32 { 90 uint32_t sec; 91 uint32_t frac[2]; 92 }; 93 94 struct vdso_timehands32 { 95 uint32_t th_algo; 96 uint32_t th_gen; 97 uint32_t th_scale[2]; 98 uint32_t th_offset_count; 99 uint32_t th_counter_mask; 100 struct bintime32 th_offset; 101 struct bintime32 th_boottime; 102 VDSO_TIMEHANDS_MD32 103 }; 104 105 struct vdso_timekeep32 { 106 uint32_t tk_ver; 107 uint32_t tk_enabled; 108 uint32_t tk_current; 109 struct vdso_timehands32 tk_th[]; 110 }; 111 112 uint32_t tc_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32); 113 uint32_t cpu_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32); 114 115 #endif 116 #endif 117 118 #endif 119