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 43 #include <efi.h> 44 #include <efilib.h> 45 46 #include <time.h> 47 #include <sys/time.h> 48 49 /* 50 * Accurate only for the past couple of centuries; 51 * that will probably do. 52 * 53 * (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h) 54 */ 55 56 #define isleap(y) (((y) % 4) == 0 && \ 57 (((y) % 100) != 0 || ((y) % 400) == 0)) 58 #define SECSPERHOUR (60*60) 59 #define SECSPERDAY (24 * SECSPERHOUR) 60 61 /* 62 * These arrays give the cumulative number of days up to the first of the 63 * month number used as the index (1 -> 12) for regular and leap years. 64 * The value at index 13 is for the whole year. 65 */ 66 static const time_t CumulativeDays[2][14] = { 67 {0, 68 0, 69 31, 70 31 + 28, 71 31 + 28 + 31, 72 31 + 28 + 31 + 30, 73 31 + 28 + 31 + 30 + 31, 74 31 + 28 + 31 + 30 + 31 + 30, 75 31 + 28 + 31 + 30 + 31 + 30 + 31, 76 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31, 77 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30, 78 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, 79 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, 80 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }, 81 {0, 82 0, 83 31, 84 31 + 29, 85 31 + 29 + 31, 86 31 + 29 + 31 + 30, 87 31 + 29 + 31 + 30 + 31, 88 31 + 29 + 31 + 30 + 31 + 30, 89 31 + 29 + 31 + 30 + 31 + 30 + 31, 90 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31, 91 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30, 92 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, 93 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, 94 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }}; 95 96 void 97 efi_time_init(void) 98 { 99 } 100 101 void 102 efi_time_fini(void) 103 { 104 } 105 106 void 107 to_efi_time(EFI_TIME *efi_time, time_t time) 108 { 109 int lyear, month; 110 time_t seconds; 111 112 if (time >= 0) { 113 efi_time->Year = 1970; 114 lyear = isleap(efi_time->Year); 115 month = 13; 116 seconds = CumulativeDays[lyear][month] * SECSPERDAY; 117 while (time > seconds) { 118 time -= seconds; 119 efi_time->Year++; 120 lyear = isleap(efi_time->Year); 121 seconds = CumulativeDays[lyear][month] * SECSPERDAY; 122 } 123 124 efi_time->Month = 0; 125 while (time > 126 CumulativeDays[lyear][efi_time->Month] * SECSPERDAY) { 127 efi_time->Month++; 128 } 129 130 month = efi_time->Month - 1; 131 time -= CumulativeDays[lyear][month] * SECSPERDAY; 132 133 for (efi_time->Day = 0; time > SECSPERDAY; efi_time->Day++) 134 time -= SECSPERDAY; 135 136 for (efi_time->Hour = 0; time > SECSPERHOUR; efi_time->Hour++) 137 time -= SECSPERHOUR; 138 139 for (efi_time->Minute = 0; time > 60; efi_time->Minute++) 140 time -= 60; 141 142 efi_time->Second = time; 143 efi_time->Nanosecond = 0; 144 efi_time->TimeZone = 0; 145 efi_time->Daylight = 0; 146 } else { 147 memset(efi_time, 0, sizeof (EFI_TIME)); 148 } 149 } 150 151 time_t 152 from_efi_time(EFI_TIME *ETime) 153 { 154 time_t UTime; 155 int Year; 156 157 /* 158 * Do a santity check 159 */ 160 if (ETime->Year < 1998 || ETime->Year > 2099 || 161 ETime->Month == 0 || ETime->Month > 12 || 162 ETime->Day == 0 || ETime->Month > 31 || 163 ETime->Hour > 23 || ETime->Minute > 59 || 164 ETime->Second > 59 || ETime->TimeZone < -1440 || 165 (ETime->TimeZone > 1440 && ETime->TimeZone != 2047)) { 166 return (0); 167 } 168 169 /* 170 * Years 171 */ 172 UTime = 0; 173 for (Year = 1970; Year != ETime->Year; ++Year) { 174 UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY); 175 } 176 177 /* 178 * UTime should now be set to 00:00:00 on Jan 1 of the file's year. 179 * 180 * Months 181 */ 182 UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * 183 SECSPERDAY); 184 185 /* 186 * UTime should now be set to 00:00:00 on the first of the file's 187 * month and year. 188 * 189 * Days -- Don't count the file's day 190 */ 191 UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY); 192 193 /* 194 * Hours 195 */ 196 UTime += (ETime->Hour * SECSPERHOUR); 197 198 /* 199 * Minutes 200 */ 201 UTime += (ETime->Minute * 60); 202 203 /* 204 * Seconds 205 */ 206 UTime += ETime->Second; 207 208 /* 209 * EFI time is repored in local time. Adjust for any time zone 210 * offset to get true UT 211 */ 212 if (ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE) { 213 /* 214 * TimeZone is kept in minues... 215 */ 216 UTime += (ETime->TimeZone * 60); 217 } 218 219 return (UTime); 220 } 221 222 static int 223 EFI_GetTimeOfDay(OUT struct timeval *tp, OUT struct timezone *tzp) 224 { 225 EFI_TIME EfiTime; 226 EFI_TIME_CAPABILITIES Capabilities; 227 EFI_STATUS Status; 228 229 /* 230 * Get time from EFI 231 */ 232 233 Status = RS->GetTime(&EfiTime, &Capabilities); 234 if (EFI_ERROR(Status)) 235 return (-1); 236 237 /* 238 * Convert to UNIX time (ie seconds since the epoch) 239 */ 240 241 tp->tv_sec = from_efi_time(&EfiTime); 242 tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */ 243 244 /* 245 * Do something with the timezone if needed 246 */ 247 248 if (tzp != NULL) { 249 if (EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE) 250 tzp->tz_minuteswest = 0; 251 else 252 tzp->tz_minuteswest = EfiTime.TimeZone; 253 /* 254 * This isn't quit right since it doesn't deal with 255 * EFI_TIME_IN_DAYLIGHT 256 */ 257 tzp->tz_dsttime = 258 EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0; 259 } 260 261 return (0); 262 } 263 264 time_t 265 time(time_t *tloc) 266 { 267 struct timeval tv; 268 269 memset(&tv, 0, sizeof (tv)); 270 EFI_GetTimeOfDay(&tv, NULL); 271 272 if (tloc) 273 *tloc = tv.tv_sec; 274 return (tv.tv_sec); 275 } 276 277 time_t 278 getsecs(void) 279 { 280 281 return (time(NULL)); 282 } 283