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 <efi.h> 42 #include <efilib.h> 43 44 #include <time.h> 45 #include <sys/time.h> 46 47 /* 48 * Accurate only for the past couple of centuries; 49 * that will probably do. 50 * 51 * (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h) 52 */ 53 54 #define isleap(y) (((y) % 4) == 0 && \ 55 (((y) % 100) != 0 || ((y) % 400) == 0)) 56 #define SECSPERHOUR (60*60) 57 #define SECSPERDAY (24 * SECSPERHOUR) 58 59 /* 60 * These arrays give the cumulative number of days up to the first of the 61 * month number used as the index (1 -> 12) for regular and leap years. 62 * The value at index 13 is for the whole year. 63 */ 64 static const time_t CumulativeDays[2][14] = { 65 {0, 66 0, 67 31, 68 31 + 28, 69 31 + 28 + 31, 70 31 + 28 + 31 + 30, 71 31 + 28 + 31 + 30 + 31, 72 31 + 28 + 31 + 30 + 31 + 30, 73 31 + 28 + 31 + 30 + 31 + 30 + 31, 74 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31, 75 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30, 76 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, 77 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, 78 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }, 79 {0, 80 0, 81 31, 82 31 + 29, 83 31 + 29 + 31, 84 31 + 29 + 31 + 30, 85 31 + 29 + 31 + 30 + 31, 86 31 + 29 + 31 + 30 + 31 + 30, 87 31 + 29 + 31 + 30 + 31 + 30 + 31, 88 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31, 89 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30, 90 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, 91 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, 92 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }}; 93 94 void 95 efi_time_init(void) 96 { 97 } 98 99 void 100 efi_time_fini(void) 101 { 102 } 103 104 void 105 to_efi_time(EFI_TIME *efi_time, time_t time) 106 { 107 int lyear, month; 108 time_t seconds; 109 110 if (time >= 0) { 111 efi_time->Year = 1970; 112 lyear = isleap(efi_time->Year); 113 month = 13; 114 seconds = CumulativeDays[lyear][month] * SECSPERDAY; 115 while (time > seconds) { 116 time -= seconds; 117 efi_time->Year++; 118 lyear = isleap(efi_time->Year); 119 seconds = CumulativeDays[lyear][month] * SECSPERDAY; 120 } 121 122 efi_time->Month = 0; 123 while (time > 124 CumulativeDays[lyear][month] * SECSPERDAY) { 125 efi_time->Month++; 126 } 127 128 month = efi_time->Month - 1; 129 time -= CumulativeDays[lyear][month] * SECSPERDAY; 130 131 for (efi_time->Day = 0; time > SECSPERDAY; efi_time->Day++) 132 time -= SECSPERDAY; 133 134 for (efi_time->Hour = 0; time > SECSPERHOUR; efi_time->Hour++) 135 time -= SECSPERHOUR; 136 137 for (efi_time->Minute = 0; time > 60; efi_time->Minute++) 138 time -= 60; 139 140 efi_time->Second = time; 141 efi_time->Nanosecond = 0; 142 efi_time->TimeZone = 0; 143 efi_time->Daylight = 0; 144 } else { 145 memset(efi_time, 0, sizeof(EFI_TIME)); 146 } 147 } 148 149 time_t 150 from_efi_time(EFI_TIME *ETime) 151 { 152 time_t UTime; 153 int Year; 154 155 /* 156 * Do a santity check 157 */ 158 if (ETime->Year < 1998 || ETime->Year > 2099 || 159 ETime->Month == 0 || ETime->Month > 12 || 160 ETime->Day == 0 || ETime->Month > 31 || 161 ETime->Hour > 23 || ETime->Minute > 59 || 162 ETime->Second > 59 || ETime->TimeZone < -1440 || 163 (ETime->TimeZone > 1440 && ETime->TimeZone != 2047)) { 164 return (0); 165 } 166 167 /* 168 * Years 169 */ 170 UTime = 0; 171 for (Year = 1970; Year != ETime->Year; ++Year) { 172 UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY); 173 } 174 175 /* 176 * UTime should now be set to 00:00:00 on Jan 1 of the file's year. 177 * 178 * Months 179 */ 180 UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * 181 SECSPERDAY); 182 183 /* 184 * UTime should now be set to 00:00:00 on the first of the file's 185 * month and year. 186 * 187 * Days -- Don't count the file's day 188 */ 189 UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY); 190 191 /* 192 * Hours 193 */ 194 UTime += (ETime->Hour * SECSPERHOUR); 195 196 /* 197 * Minutes 198 */ 199 UTime += (ETime->Minute * 60); 200 201 /* 202 * Seconds 203 */ 204 UTime += ETime->Second; 205 206 /* 207 * EFI time is repored in local time. Adjust for any time zone 208 * offset to get true UT 209 */ 210 if (ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE) { 211 /* 212 * TimeZone is kept in minues... 213 */ 214 UTime += (ETime->TimeZone * 60); 215 } 216 217 return (UTime); 218 } 219 220 static int 221 EFI_GetTimeOfDay(OUT struct timeval *tp, OUT struct timezone *tzp) 222 { 223 EFI_TIME EfiTime; 224 EFI_TIME_CAPABILITIES Capabilities; 225 EFI_STATUS Status; 226 227 /* 228 * Get time from EFI 229 */ 230 231 Status = RS->GetTime(&EfiTime, &Capabilities); 232 if (EFI_ERROR(Status)) 233 return (-1); 234 235 /* 236 * Convert to UNIX time (ie seconds since the epoch 237 */ 238 239 tp->tv_sec = from_efi_time(&EfiTime); 240 tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */ 241 242 /* 243 * Do something with the timezone if needed 244 */ 245 246 if (tzp != NULL) { 247 if (EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE) 248 tzp->tz_minuteswest = 0; 249 else 250 tzp->tz_minuteswest = EfiTime.TimeZone; 251 /* 252 * This isn't quit right since it doesn't deal with 253 * EFI_TIME_IN_DAYLIGHT 254 */ 255 tzp->tz_dsttime = 256 EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0; 257 } 258 259 return (0); 260 } 261 262 time_t 263 time(time_t *tloc) 264 { 265 struct timeval tv; 266 267 memset(&tv, 0, sizeof(tv)); 268 EFI_GetTimeOfDay(&tv, NULL); 269 270 if (tloc) 271 *tloc = tv.tv_sec; 272 return (tv.tv_sec); 273 } 274 275 time_t 276 getsecs(void) 277 { 278 279 return (time(NULL)); 280 } 281