1/*	$NetBSD: time.c,v 1.2 2006/04/22 07:58:53 cherry 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/*
52// Accurate only for the past couple of centuries;
53// that will probably do.
54//
55// (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h)
56*/
57
58#define isleap(y)	(((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
59#define SECSPERHOUR ( 60*60 )
60#define SECSPERDAY	(24 * SECSPERHOUR)
61
62time_t
63EfiTimeToUnixTime(EFI_TIME *ETime)
64{
65    /*
66    //  These arrays give the cumulative number of days up to the first of the
67    //  month number used as the index (1 -> 12) for regular and leap years.
68    //  The value at index 13 is for the whole year.
69    */
70    static time_t CumulativeDays[2][14] = {
71    {0,
72     0,
73     31,
74     31 + 28,
75     31 + 28 + 31,
76     31 + 28 + 31 + 30,
77     31 + 28 + 31 + 30 + 31,
78     31 + 28 + 31 + 30 + 31 + 30,
79     31 + 28 + 31 + 30 + 31 + 30 + 31,
80     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
81     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
82     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
83     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
84     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
85    {0,
86     0,
87     31,
88     31 + 29,
89     31 + 29 + 31,
90     31 + 29 + 31 + 30,
91     31 + 29 + 31 + 30 + 31,
92     31 + 29 + 31 + 30 + 31 + 30,
93     31 + 29 + 31 + 30 + 31 + 30 + 31,
94     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
95     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
96     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
97     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
98     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};
99
100    time_t  UTime;
101    int     Year;
102
103    /*
104    //  Do a santity check
105    */
106    if ( ETime->Year  <  1998 || ETime->Year   > 2099 ||
107    	 ETime->Month ==    0 || ETime->Month  >   12 ||
108    	 ETime->Day   ==    0 || ETime->Month  >   31 ||
109    	                         ETime->Hour   >   23 ||
110    	                         ETime->Minute >   59 ||
111    	                         ETime->Second >   59 ||
112    	 ETime->TimeZone  < -1440                     ||
113    	 (ETime->TimeZone >  1440 && ETime->TimeZone != 2047) ) {
114    	return (0);
115    }
116
117    /*
118    // Years
119    */
120    UTime = 0;
121    for (Year = 1970; Year != ETime->Year; ++Year) {
122        UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY);
123    }
124
125    /*
126    // UTime should now be set to 00:00:00 on Jan 1 of the file's year.
127    //
128    // Months
129    */
130    UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * SECSPERDAY);
131
132    /*
133    // UTime should now be set to 00:00:00 on the first of the file's month and year
134    //
135    // Days -- Don't count the file's day
136    */
137    UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY);
138
139    /*
140    // Hours
141    */
142    UTime += (ETime->Hour * SECSPERHOUR);
143
144    /*
145    // Minutes
146    */
147    UTime += (ETime->Minute * 60);
148
149    /*
150    // Seconds
151    */
152    UTime += ETime->Second;
153
154    /*
155    //  EFI time is repored in local time.  Adjust for any time zone offset to
156    //  get true UT
157    */
158    if ( ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE ) {
159    	/*
160    	//  TimeZone is kept in minues...
161    	*/
162    	UTime += (ETime->TimeZone * 60);
163    }
164
165    return UTime;
166}
167
168int
169EFI_GetTimeOfDay(
170	OUT struct timeval *tp,
171	OUT struct timezone *tzp
172	)
173{
174	EFI_TIME				EfiTime;
175	EFI_TIME_CAPABILITIES	Capabilities;
176	EFI_STATUS				Status;
177
178	/*
179	//  Get time from EFI
180	*/
181
182	Status = RS->GetTime( &EfiTime, &Capabilities );
183	if (EFI_ERROR(Status))
184		return (-1);
185
186	/*
187	//  Convert to UNIX time (ie seconds since the epoch
188	*/
189
190	tp->tv_sec  = EfiTimeToUnixTime( &EfiTime );
191	tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */
192
193	/*
194	//  Do something with the timezone if needed
195	*/
196
197	if (tzp) {
198		tzp->tz_minuteswest =
199			EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE ? 0 : EfiTime.TimeZone;
200		/*
201		//  This isn't quit right since it doesn't deal with EFI_TIME_IN_DAYLIGHT
202		*/
203		tzp->tz_dsttime =
204			EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0;
205	}
206
207	return (0);
208}
209
210time_t
211time(time_t *tloc)
212{
213	struct timeval tv;
214	EFI_GetTimeOfDay(&tv, 0);
215
216	if (tloc)
217		*tloc = tv.tv_sec;
218	return tv.tv_sec;
219}
220
221time_t
222getsecs(void)
223{
224    return time(0);
225}
226