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 struct timecounter; 73 74 struct vdso_sv_tk { 75 int sv_timekeep_off; 76 int sv_timekeep_curr; 77 uint32_t sv_timekeep_gen; 78 }; 79 80 void timekeep_push_vdso(void); 81 82 uint32_t tc_fill_vdso_timehands(struct vdso_timehands *vdso_th); 83 84 /* 85 * The cpu_fill_vdso_timehands() function should fill MD-part of the 86 * struct vdso_timehands, which is both machine- and 87 * timecounter-depended. The return value should be 1 if fast 88 * userspace timecounter is enabled by hardware, and 0 otherwise. The 89 * global sysctl enable override is handled by machine-independed code 90 * after cpu_fill_vdso_timehands() call is made. 91 */ 92 uint32_t cpu_fill_vdso_timehands(struct vdso_timehands *vdso_th, 93 struct timecounter *tc); 94 95 struct vdso_sv_tk *alloc_sv_tk(void); 96 97 #define VDSO_TH_NUM 4 98 99 #ifdef COMPAT_FREEBSD32 100 struct bintime32 { 101 uint32_t sec; 102 uint32_t frac[2]; 103 }; 104 105 struct vdso_timehands32 { 106 uint32_t th_algo; 107 uint32_t th_gen; 108 uint32_t th_scale[2]; 109 uint32_t th_offset_count; 110 uint32_t th_counter_mask; 111 struct bintime32 th_offset; 112 struct bintime32 th_boottime; 113 VDSO_TIMEHANDS_MD32 114 }; 115 116 struct vdso_timekeep32 { 117 uint32_t tk_ver; 118 uint32_t tk_enabled; 119 uint32_t tk_current; 120 struct vdso_timehands32 tk_th[]; 121 }; 122 123 uint32_t tc_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32); 124 uint32_t cpu_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32, 125 struct timecounter *tc); 126 struct vdso_sv_tk *alloc_sv_tk_compat32(void); 127 128 #endif 129 #endif 130 131 #endif 132