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