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
64time_t
65EfiTimeToUnixTime(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
170int
171EFI_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
212time_t
213time(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
223time_t
224getsecs(void)
225{
226    return time(0);
227}
228