time.c revision 303975
1/*- 2 * Copyright (c) 1999, 2000 3 * Intel Corporation. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * 20 * This product includes software developed by Intel Corporation and 21 * its contributors. 22 * 23 * 4. Neither the name of Intel Corporation or its contributors may be 24 * used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS'' 28 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE 31 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 37 * THE POSSIBILITY OF SUCH DAMAGE. 38 * 39 */ 40 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: releng/11.0/sys/boot/efi/libefi/time.c 301306 2016-06-04 08:47:45Z andrew $"); 43 44#include <efi.h> 45#include <efilib.h> 46 47#include <time.h> 48#include <sys/time.h> 49 50/* 51// Accurate only for the past couple of centuries; 52// that will probably do. 53// 54// (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h) 55*/ 56 57#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) 58#define SECSPERHOUR ( 60*60 ) 59#define SECSPERDAY (24 * SECSPERHOUR) 60 61void 62efi_time_init(void) 63{ 64} 65 66void 67efi_time_fini(void) 68{ 69} 70 71static time_t 72efi_time(EFI_TIME *ETime) 73{ 74 /* 75 // These arrays give the cumulative number of days up to the first of the 76 // month number used as the index (1 -> 12) for regular and leap years. 77 // The value at index 13 is for the whole year. 78 */ 79 static time_t CumulativeDays[2][14] = { 80 {0, 81 0, 82 31, 83 31 + 28, 84 31 + 28 + 31, 85 31 + 28 + 31 + 30, 86 31 + 28 + 31 + 30 + 31, 87 31 + 28 + 31 + 30 + 31 + 30, 88 31 + 28 + 31 + 30 + 31 + 30 + 31, 89 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31, 90 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30, 91 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, 92 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, 93 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }, 94 {0, 95 0, 96 31, 97 31 + 29, 98 31 + 29 + 31, 99 31 + 29 + 31 + 30, 100 31 + 29 + 31 + 30 + 31, 101 31 + 29 + 31 + 30 + 31 + 30, 102 31 + 29 + 31 + 30 + 31 + 30 + 31, 103 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31, 104 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30, 105 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, 106 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, 107 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }}; 108 109 time_t UTime; 110 int Year; 111 112 /* 113 // Do a santity check 114 */ 115 if ( ETime->Year < 1998 || ETime->Year > 2099 || 116 ETime->Month == 0 || ETime->Month > 12 || 117 ETime->Day == 0 || ETime->Month > 31 || 118 ETime->Hour > 23 || 119 ETime->Minute > 59 || 120 ETime->Second > 59 || 121 ETime->TimeZone < -1440 || 122 (ETime->TimeZone > 1440 && ETime->TimeZone != 2047) ) { 123 return (0); 124 } 125 126 /* 127 // Years 128 */ 129 UTime = 0; 130 for (Year = 1970; Year != ETime->Year; ++Year) { 131 UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY); 132 } 133 134 /* 135 // UTime should now be set to 00:00:00 on Jan 1 of the file's year. 136 // 137 // Months 138 */ 139 UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * SECSPERDAY); 140 141 /* 142 // UTime should now be set to 00:00:00 on the first of the file's month and year 143 // 144 // Days -- Don't count the file's day 145 */ 146 UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY); 147 148 /* 149 // Hours 150 */ 151 UTime += (ETime->Hour * SECSPERHOUR); 152 153 /* 154 // Minutes 155 */ 156 UTime += (ETime->Minute * 60); 157 158 /* 159 // Seconds 160 */ 161 UTime += ETime->Second; 162 163 /* 164 // EFI time is repored in local time. Adjust for any time zone offset to 165 // get true UT 166 */ 167 if ( ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE ) { 168 /* 169 // TimeZone is kept in minues... 170 */ 171 UTime += (ETime->TimeZone * 60); 172 } 173 174 return UTime; 175} 176 177static int 178EFI_GetTimeOfDay( 179 OUT struct timeval *tp, 180 OUT struct timezone *tzp 181 ) 182{ 183 EFI_TIME EfiTime; 184 EFI_TIME_CAPABILITIES Capabilities; 185 EFI_STATUS Status; 186 187 /* 188 // Get time from EFI 189 */ 190 191 Status = RS->GetTime(&EfiTime, &Capabilities); 192 if (EFI_ERROR(Status)) 193 return (-1); 194 195 /* 196 // Convert to UNIX time (ie seconds since the epoch 197 */ 198 199 tp->tv_sec = efi_time( &EfiTime ); 200 tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */ 201 202 /* 203 // Do something with the timezone if needed 204 */ 205 206 if (tzp) { 207 tzp->tz_minuteswest = 208 EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE ? 0 : EfiTime.TimeZone; 209 /* 210 // This isn't quit right since it doesn't deal with EFI_TIME_IN_DAYLIGHT 211 */ 212 tzp->tz_dsttime = 213 EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0; 214 } 215 216 return (0); 217} 218 219time_t 220time(time_t *tloc) 221{ 222 struct timeval tv; 223 EFI_GetTimeOfDay(&tv, 0); 224 225 if (tloc) 226 *tloc = tv.tv_sec; 227 return tv.tv_sec; 228} 229 230time_t 231getsecs() 232{ 233 return time(0); 234} 235