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("$FreeBSD$");
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 && \
58 (((y) % 100) != 0 || ((y) % 400) == 0))
59 #define SECSPERHOUR (60*60)
60 #define SECSPERDAY (24 * SECSPERHOUR)
61
62 /*
63 * These arrays give the cumulative number of days up to the first of the
64 * month number used as the index (1 -> 12) for regular and leap years.
65 * The value at index 13 is for the whole year.
66 */
67 static const time_t CumulativeDays[2][14] = {
68 {0,
69 0,
70 31,
71 31 + 28,
72 31 + 28 + 31,
73 31 + 28 + 31 + 30,
74 31 + 28 + 31 + 30 + 31,
75 31 + 28 + 31 + 30 + 31 + 30,
76 31 + 28 + 31 + 30 + 31 + 30 + 31,
77 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
78 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
79 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
80 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
81 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
82 {0,
83 0,
84 31,
85 31 + 29,
86 31 + 29 + 31,
87 31 + 29 + 31 + 30,
88 31 + 29 + 31 + 30 + 31,
89 31 + 29 + 31 + 30 + 31 + 30,
90 31 + 29 + 31 + 30 + 31 + 30 + 31,
91 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
92 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
93 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
94 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
95 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};
96
97 void
efi_time_init(void)98 efi_time_init(void)
99 {
100 }
101
102 void
efi_time_fini(void)103 efi_time_fini(void)
104 {
105 }
106
107 void
to_efi_time(EFI_TIME * efi_time,time_t time)108 to_efi_time(EFI_TIME *efi_time, time_t time)
109 {
110 int lyear, month;
111 time_t seconds;
112
113 if (time >= 0) {
114 efi_time->Year = 1970;
115 lyear = isleap(efi_time->Year);
116 month = 13;
117 seconds = CumulativeDays[lyear][month] * SECSPERDAY;
118 while (time > seconds) {
119 time -= seconds;
120 efi_time->Year++;
121 lyear = isleap(efi_time->Year);
122 seconds = CumulativeDays[lyear][month] * SECSPERDAY;
123 }
124
125 efi_time->Month = 0;
126 while (time >
127 CumulativeDays[lyear][month] * SECSPERDAY) {
128 efi_time->Month++;
129 }
130
131 month = efi_time->Month - 1;
132 time -= CumulativeDays[lyear][month] * SECSPERDAY;
133
134 for (efi_time->Day = 0; time > SECSPERDAY; efi_time->Day++)
135 time -= SECSPERDAY;
136
137 for (efi_time->Hour = 0; time > SECSPERHOUR; efi_time->Hour++)
138 time -= SECSPERHOUR;
139
140 for (efi_time->Minute = 0; time > 60; efi_time->Minute++)
141 time -= 60;
142
143 efi_time->Second = time;
144 efi_time->Nanosecond = 0;
145 efi_time->TimeZone = 0;
146 efi_time->Daylight = 0;
147 } else {
148 memset(efi_time, 0, sizeof(EFI_TIME));
149 }
150 }
151
152 time_t
from_efi_time(EFI_TIME * ETime)153 from_efi_time(EFI_TIME *ETime)
154 {
155 time_t UTime;
156 int Year;
157
158 /*
159 * Do a santity check
160 */
161 if (ETime->Year < 1998 || ETime->Year > 2099 ||
162 ETime->Month == 0 || ETime->Month > 12 ||
163 ETime->Day == 0 || ETime->Month > 31 ||
164 ETime->Hour > 23 || ETime->Minute > 59 ||
165 ETime->Second > 59 || ETime->TimeZone < -1440 ||
166 (ETime->TimeZone > 1440 && ETime->TimeZone != 2047)) {
167 return (0);
168 }
169
170 /*
171 * Years
172 */
173 UTime = 0;
174 for (Year = 1970; Year != ETime->Year; ++Year) {
175 UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY);
176 }
177
178 /*
179 * UTime should now be set to 00:00:00 on Jan 1 of the file's year.
180 *
181 * Months
182 */
183 UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] *
184 SECSPERDAY);
185
186 /*
187 * UTime should now be set to 00:00:00 on the first of the file's
188 * month and year.
189 *
190 * Days -- Don't count the file's day
191 */
192 UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY);
193
194 /*
195 * Hours
196 */
197 UTime += (ETime->Hour * SECSPERHOUR);
198
199 /*
200 * Minutes
201 */
202 UTime += (ETime->Minute * 60);
203
204 /*
205 * Seconds
206 */
207 UTime += ETime->Second;
208
209 /*
210 * EFI time is repored in local time. Adjust for any time zone
211 * offset to get true UT
212 */
213 if (ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE) {
214 /*
215 * TimeZone is kept in minues...
216 */
217 UTime += (ETime->TimeZone * 60);
218 }
219
220 return (UTime);
221 }
222
223 static int
EFI_GetTimeOfDay(OUT struct timeval * tp,OUT struct timezone * tzp)224 EFI_GetTimeOfDay(OUT struct timeval *tp, OUT struct timezone *tzp)
225 {
226 EFI_TIME EfiTime;
227 EFI_TIME_CAPABILITIES Capabilities;
228 EFI_STATUS Status;
229
230 /*
231 * Get time from EFI
232 */
233
234 Status = RS->GetTime(&EfiTime, &Capabilities);
235 if (EFI_ERROR(Status))
236 return (-1);
237
238 /*
239 * Convert to UNIX time (ie seconds since the epoch
240 */
241
242 tp->tv_sec = from_efi_time(&EfiTime);
243 tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */
244
245 /*
246 * Do something with the timezone if needed
247 */
248
249 if (tzp != NULL) {
250 if (EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE)
251 tzp->tz_minuteswest = 0;
252 else
253 tzp->tz_minuteswest = EfiTime.TimeZone;
254 /*
255 * This isn't quit right since it doesn't deal with
256 * EFI_TIME_IN_DAYLIGHT
257 */
258 tzp->tz_dsttime =
259 EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0;
260 }
261
262 return (0);
263 }
264
265 time_t
time(time_t * tloc)266 time(time_t *tloc)
267 {
268 struct timeval tv;
269
270 memset(&tv, 0, sizeof(tv));
271 EFI_GetTimeOfDay(&tv, NULL);
272
273 if (tloc)
274 *tloc = tv.tv_sec;
275 return (tv.tv_sec);
276 }
277
278 time_t
getsecs(void)279 getsecs(void)
280 {
281
282 return (time(NULL));
283 }
284