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      1 /*	$NetBSD: time.c,v 1.4 2016/08/04 18:07:43 scole Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999, 2000
      5  * Intel Corporation.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *
     22  *    This product includes software developed by Intel Corporation and
     23  *    its contributors.
     24  *
     25  * 4. Neither the name of Intel Corporation or its contributors may be
     26  *    used to endorse or promote products derived from this software
     27  *    without specific prior written permission.
     28  *
     29  * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''
     30  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     32  * ARE DISCLAIMED.  IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE
     33  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     34  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     35  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     36  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     37  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     39  * THE POSSIBILITY OF SUCH DAMAGE.
     40  *
     41  */
     42 
     43 #include <sys/cdefs.h>
     44 /* __FBSDID("$FreeBSD: src/sys/boot/efi/libefi/time.c,v 1.4 2003/04/03 21:36:29 obrien Exp $");
     45  */
     46 #include <efi.h>
     47 #include <efilib.h>
     48 
     49 #include <sys/time.h>
     50 
     51 #include <machine/efilib.h>
     52 
     53 /*
     54 // Accurate only for the past couple of centuries;
     55 // that will probably do.
     56 //
     57 // (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h)
     58 */
     59 
     60 #define isleap(y)	(((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
     61 #define SECSPERHOUR ( 60*60 )
     62 #define SECSPERDAY	(24 * SECSPERHOUR)
     63 
     64 time_t
     65 EfiTimeToUnixTime(EFI_TIME *ETime)
     66 {
     67     /*
     68     //  These arrays give the cumulative number of days up to the first of the
     69     //  month number used as the index (1 -> 12) for regular and leap years.
     70     //  The value at index 13 is for the whole year.
     71     */
     72     static time_t CumulativeDays[2][14] = {
     73     {0,
     74      0,
     75      31,
     76      31 + 28,
     77      31 + 28 + 31,
     78      31 + 28 + 31 + 30,
     79      31 + 28 + 31 + 30 + 31,
     80      31 + 28 + 31 + 30 + 31 + 30,
     81      31 + 28 + 31 + 30 + 31 + 30 + 31,
     82      31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
     83      31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
     84      31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
     85      31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
     86      31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
     87     {0,
     88      0,
     89      31,
     90      31 + 29,
     91      31 + 29 + 31,
     92      31 + 29 + 31 + 30,
     93      31 + 29 + 31 + 30 + 31,
     94      31 + 29 + 31 + 30 + 31 + 30,
     95      31 + 29 + 31 + 30 + 31 + 30 + 31,
     96      31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
     97      31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
     98      31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
     99      31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
    100      31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};
    101 
    102     time_t  UTime;
    103     int     Year;
    104 
    105     /*
    106     //  Do a santity check
    107     */
    108     if ( ETime->Year  <  1998 || ETime->Year   > 2099 ||
    109     	 ETime->Month ==    0 || ETime->Month  >   12 ||
    110     	 ETime->Day   ==    0 || ETime->Month  >   31 ||
    111     	                         ETime->Hour   >   23 ||
    112     	                         ETime->Minute >   59 ||
    113     	                         ETime->Second >   59 ||
    114     	 ETime->TimeZone  < -1440                     ||
    115     	 (ETime->TimeZone >  1440 && ETime->TimeZone != 2047) ) {
    116     	return (0);
    117     }
    118 
    119     /*
    120     // Years
    121     */
    122     UTime = 0;
    123     for (Year = 1970; Year != ETime->Year; ++Year) {
    124         UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY);
    125     }
    126 
    127     /*
    128     // UTime should now be set to 00:00:00 on Jan 1 of the file's year.
    129     //
    130     // Months
    131     */
    132     UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * SECSPERDAY);
    133 
    134     /*
    135     // UTime should now be set to 00:00:00 on the first of the file's month and year
    136     //
    137     // Days -- Don't count the file's day
    138     */
    139     UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY);
    140 
    141     /*
    142     // Hours
    143     */
    144     UTime += (ETime->Hour * SECSPERHOUR);
    145 
    146     /*
    147     // Minutes
    148     */
    149     UTime += (ETime->Minute * 60);
    150 
    151     /*
    152     // Seconds
    153     */
    154     UTime += ETime->Second;
    155 
    156     /*
    157     //  EFI time is repored in local time.  Adjust for any time zone offset to
    158     //  get true UT
    159     */
    160     if ( ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE ) {
    161     	/*
    162     	//  TimeZone is kept in minues...
    163     	*/
    164     	UTime += (ETime->TimeZone * 60);
    165     }
    166 
    167     return UTime;
    168 }
    169 
    170 int
    171 EFI_GetTimeOfDay(
    172 	OUT struct timeval *tp,
    173 	OUT struct timezone *tzp
    174 	)
    175 {
    176 	EFI_TIME				EfiTime;
    177 	EFI_TIME_CAPABILITIES	Capabilities;
    178 	EFI_STATUS				Status;
    179 
    180 	/*
    181 	//  Get time from EFI
    182 	*/
    183 
    184 	Status = RS->GetTime( &EfiTime, &Capabilities );
    185 	if (EFI_ERROR(Status))
    186 		return (-1);
    187 
    188 	/*
    189 	//  Convert to UNIX time (ie seconds since the epoch
    190 	*/
    191 
    192 	tp->tv_sec  = EfiTimeToUnixTime( &EfiTime );
    193 	tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */
    194 
    195 	/*
    196 	//  Do something with the timezone if needed
    197 	*/
    198 
    199 	if (tzp) {
    200 		tzp->tz_minuteswest =
    201 			EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE ? 0 : EfiTime.TimeZone;
    202 		/*
    203 		//  This isn't quit right since it doesn't deal with EFI_TIME_IN_DAYLIGHT
    204 		*/
    205 		tzp->tz_dsttime =
    206 			EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0;
    207 	}
    208 
    209 	return (0);
    210 }
    211 
    212 time_t
    213 time(time_t *tloc)
    214 {
    215 	struct timeval tv;
    216 	EFI_GetTimeOfDay(&tv, 0);
    217 
    218 	if (tloc)
    219 		*tloc = tv.tv_sec;
    220 	return tv.tv_sec;
    221 }
    222 
    223 time_t
    224 getsecs(void)
    225 {
    226     return time(0);
    227 }
    228