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__FBSDID("$FreeBSD: releng/10.3/sys/boot/efi/libefi/time.c 164010 2006-11-05 22:03:04Z marcel $");
43
44#include <efi.h>
45#include <efilib.h>
46
47#include <time.h>
48#include <sys/time.h>
49
50/*
51// Accurate only for the past couple of centuries;
52// that will probably do.
53//
54// (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h)
55*/
56
57#define isleap(y)	(((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
58#define SECSPERHOUR ( 60*60 )
59#define SECSPERDAY	(24 * SECSPERHOUR)
60
61time_t
62efi_time(EFI_TIME *ETime)
63{
64    /*
65    //  These arrays give the cumulative number of days up to the first of the
66    //  month number used as the index (1 -> 12) for regular and leap years.
67    //  The value at index 13 is for the whole year.
68    */
69    static time_t CumulativeDays[2][14] = {
70    {0,
71     0,
72     31,
73     31 + 28,
74     31 + 28 + 31,
75     31 + 28 + 31 + 30,
76     31 + 28 + 31 + 30 + 31,
77     31 + 28 + 31 + 30 + 31 + 30,
78     31 + 28 + 31 + 30 + 31 + 30 + 31,
79     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
80     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
81     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
82     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
83     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
84    {0,
85     0,
86     31,
87     31 + 29,
88     31 + 29 + 31,
89     31 + 29 + 31 + 30,
90     31 + 29 + 31 + 30 + 31,
91     31 + 29 + 31 + 30 + 31 + 30,
92     31 + 29 + 31 + 30 + 31 + 30 + 31,
93     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
94     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
95     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
96     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
97     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};
98
99    time_t  UTime;
100    int     Year;
101
102    /*
103    //  Do a santity check
104    */
105    if ( ETime->Year  <  1998 || ETime->Year   > 2099 ||
106    	 ETime->Month ==    0 || ETime->Month  >   12 ||
107    	 ETime->Day   ==    0 || ETime->Month  >   31 ||
108    	                         ETime->Hour   >   23 ||
109    	                         ETime->Minute >   59 ||
110    	                         ETime->Second >   59 ||
111    	 ETime->TimeZone  < -1440                     ||
112    	 (ETime->TimeZone >  1440 && ETime->TimeZone != 2047) ) {
113    	return (0);
114    }
115
116    /*
117    // Years
118    */
119    UTime = 0;
120    for (Year = 1970; Year != ETime->Year; ++Year) {
121        UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY);
122    }
123
124    /*
125    // UTime should now be set to 00:00:00 on Jan 1 of the file's year.
126    //
127    // Months
128    */
129    UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * SECSPERDAY);
130
131    /*
132    // UTime should now be set to 00:00:00 on the first of the file's month and year
133    //
134    // Days -- Don't count the file's day
135    */
136    UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY);
137
138    /*
139    // Hours
140    */
141    UTime += (ETime->Hour * SECSPERHOUR);
142
143    /*
144    // Minutes
145    */
146    UTime += (ETime->Minute * 60);
147
148    /*
149    // Seconds
150    */
151    UTime += ETime->Second;
152
153    /*
154    //  EFI time is repored in local time.  Adjust for any time zone offset to
155    //  get true UT
156    */
157    if ( ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE ) {
158    	/*
159    	//  TimeZone is kept in minues...
160    	*/
161    	UTime += (ETime->TimeZone * 60);
162    }
163
164    return UTime;
165}
166
167int
168EFI_GetTimeOfDay(
169	OUT struct timeval *tp,
170	OUT struct timezone *tzp
171	)
172{
173	EFI_TIME		EfiTime;
174	EFI_TIME_CAPABILITIES	Capabilities;
175	EFI_STATUS		Status;
176
177	/*
178	//  Get time from EFI
179	*/
180
181	Status = RS->GetTime(&EfiTime, &Capabilities);
182	if (EFI_ERROR(Status))
183		return (-1);
184
185	/*
186	//  Convert to UNIX time (ie seconds since the epoch
187	*/
188
189	tp->tv_sec  = efi_time( &EfiTime );
190	tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */
191
192	/*
193	//  Do something with the timezone if needed
194	*/
195
196	if (tzp) {
197		tzp->tz_minuteswest =
198			EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE ? 0 : EfiTime.TimeZone;
199		/*
200		//  This isn't quit right since it doesn't deal with EFI_TIME_IN_DAYLIGHT
201		*/
202		tzp->tz_dsttime =
203			EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0;
204	}
205
206	return (0);
207}
208
209time_t
210time(time_t *tloc)
211{
212	struct timeval tv;
213	EFI_GetTimeOfDay(&tv, 0);
214
215	if (tloc)
216		*tloc = tv.tv_sec;
217	return tv.tv_sec;
218}
219
220time_t
221getsecs()
222{
223    return time(0);
224}
225