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
EfiTimeToUnixTime(EFI_TIME * ETime)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
EFI_GetTimeOfDay(OUT struct timeval * tp,OUT struct timezone * tzp)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
time(time_t * tloc)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
getsecs(void)224 getsecs(void)
225 {
226 return time(0);
227 }
228