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: head/sys/boot/efi/libefi/time.c 295869 2016-02-21 21:20:23Z andrew $");
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
61 static time_t
efi_time(EFI_TIME * ETime)62 efi_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
167 static int
EFI_GetTimeOfDay(OUT struct timeval * tp,OUT struct timezone * tzp)168 EFI_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
209 time_t
time(time_t * tloc)210 time(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
220 time_t
getsecs(void)221 getsecs(void)
222 {
223 return time(0);
224 }
225