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 #include <efi.h>
43 #include <efilib.h>
44
45 #include <time.h>
46 #include <sys/time.h>
47
48 /*
49 * Accurate only for the past couple of centuries;
50 * that will probably do.
51 *
52 * (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h)
53 */
54
55 #define isleap(y) (((y) % 4) == 0 && \
56 (((y) % 100) != 0 || ((y) % 400) == 0))
57 #define SECSPERHOUR (60*60)
58 #define SECSPERDAY (24 * SECSPERHOUR)
59
60 /*
61 * These arrays give the cumulative number of days up to the first of the
62 * month number used as the index (1 -> 12) for regular and leap years.
63 * The value at index 13 is for the whole year.
64 */
65 static const time_t CumulativeDays[2][14] = {
66 {0,
67 0,
68 31,
69 31 + 28,
70 31 + 28 + 31,
71 31 + 28 + 31 + 30,
72 31 + 28 + 31 + 30 + 31,
73 31 + 28 + 31 + 30 + 31 + 30,
74 31 + 28 + 31 + 30 + 31 + 30 + 31,
75 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
76 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
77 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
78 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
79 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
80 {0,
81 0,
82 31,
83 31 + 29,
84 31 + 29 + 31,
85 31 + 29 + 31 + 30,
86 31 + 29 + 31 + 30 + 31,
87 31 + 29 + 31 + 30 + 31 + 30,
88 31 + 29 + 31 + 30 + 31 + 30 + 31,
89 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
90 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
91 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
92 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
93 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};
94
95 void
efi_time_init(void)96 efi_time_init(void)
97 {
98 }
99
100 void
efi_time_fini(void)101 efi_time_fini(void)
102 {
103 }
104
105 void
to_efi_time(EFI_TIME * efi_time,time_t time)106 to_efi_time(EFI_TIME *efi_time, time_t time)
107 {
108 int lyear, month;
109 time_t seconds;
110
111 if (time >= 0) {
112 efi_time->Year = 1970;
113 lyear = isleap(efi_time->Year);
114 month = 13;
115 seconds = CumulativeDays[lyear][month] * SECSPERDAY;
116 while (time > seconds) {
117 time -= seconds;
118 efi_time->Year++;
119 lyear = isleap(efi_time->Year);
120 seconds = CumulativeDays[lyear][month] * SECSPERDAY;
121 }
122
123 efi_time->Month = 0;
124 while (time >
125 CumulativeDays[lyear][month] * SECSPERDAY) {
126 efi_time->Month++;
127 }
128
129 month = efi_time->Month - 1;
130 time -= CumulativeDays[lyear][month] * SECSPERDAY;
131
132 for (efi_time->Day = 0; time > SECSPERDAY; efi_time->Day++)
133 time -= SECSPERDAY;
134
135 for (efi_time->Hour = 0; time > SECSPERHOUR; efi_time->Hour++)
136 time -= SECSPERHOUR;
137
138 for (efi_time->Minute = 0; time > 60; efi_time->Minute++)
139 time -= 60;
140
141 efi_time->Second = time;
142 efi_time->Nanosecond = 0;
143 efi_time->TimeZone = 0;
144 efi_time->Daylight = 0;
145 } else {
146 memset(efi_time, 0, sizeof(EFI_TIME));
147 }
148 }
149
150 time_t
from_efi_time(EFI_TIME * ETime)151 from_efi_time(EFI_TIME *ETime)
152 {
153 time_t UTime;
154 int Year;
155
156 /*
157 * Do a santity check
158 */
159 if (ETime->Year < 1998 || ETime->Year > 2099 ||
160 ETime->Month == 0 || ETime->Month > 12 ||
161 ETime->Day == 0 || ETime->Month > 31 ||
162 ETime->Hour > 23 || ETime->Minute > 59 ||
163 ETime->Second > 59 || ETime->TimeZone < -1440 ||
164 (ETime->TimeZone > 1440 && ETime->TimeZone != 2047)) {
165 return (0);
166 }
167
168 /*
169 * Years
170 */
171 UTime = 0;
172 for (Year = 1970; Year != ETime->Year; ++Year) {
173 UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY);
174 }
175
176 /*
177 * UTime should now be set to 00:00:00 on Jan 1 of the file's year.
178 *
179 * Months
180 */
181 UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] *
182 SECSPERDAY);
183
184 /*
185 * UTime should now be set to 00:00:00 on the first of the file's
186 * month and year.
187 *
188 * Days -- Don't count the file's day
189 */
190 UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY);
191
192 /*
193 * Hours
194 */
195 UTime += (ETime->Hour * SECSPERHOUR);
196
197 /*
198 * Minutes
199 */
200 UTime += (ETime->Minute * 60);
201
202 /*
203 * Seconds
204 */
205 UTime += ETime->Second;
206
207 /*
208 * EFI time is repored in local time. Adjust for any time zone
209 * offset to get true UT
210 */
211 if (ETime->TimeZone != EFI_UNSPECIFIED_TIMEZONE) {
212 /*
213 * TimeZone is kept in minues...
214 */
215 UTime += (ETime->TimeZone * 60);
216 }
217
218 return (UTime);
219 }
220
221 static int
EFI_GetTimeOfDay(OUT struct timeval * tp,OUT struct timezone * tzp)222 EFI_GetTimeOfDay(OUT struct timeval *tp, OUT struct timezone *tzp)
223 {
224 EFI_TIME EfiTime;
225 EFI_TIME_CAPABILITIES Capabilities;
226 EFI_STATUS Status;
227
228 /*
229 * Get time from EFI
230 */
231
232 Status = RS->GetTime(&EfiTime, &Capabilities);
233 if (EFI_ERROR(Status))
234 return (-1);
235
236 /*
237 * Convert to UNIX time (ie seconds since the epoch
238 */
239
240 tp->tv_sec = from_efi_time(&EfiTime);
241 tp->tv_usec = 0; /* EfiTime.Nanosecond * 1000; */
242
243 /*
244 * Do something with the timezone if needed
245 */
246
247 if (tzp != NULL) {
248 if (EfiTime.TimeZone == EFI_UNSPECIFIED_TIMEZONE)
249 tzp->tz_minuteswest = 0;
250 else
251 tzp->tz_minuteswest = EfiTime.TimeZone;
252 /*
253 * This isn't quit right since it doesn't deal with
254 * EFI_TIME_IN_DAYLIGHT
255 */
256 tzp->tz_dsttime =
257 EfiTime.Daylight & EFI_TIME_ADJUST_DAYLIGHT ? 1 : 0;
258 }
259
260 return (0);
261 }
262
263 time_t
time(time_t * tloc)264 time(time_t *tloc)
265 {
266 struct timeval tv;
267
268 memset(&tv, 0, sizeof(tv));
269 EFI_GetTimeOfDay(&tv, NULL);
270
271 if (tloc)
272 *tloc = tv.tv_sec;
273 return (tv.tv_sec);
274 }
275
276 time_t
getsecs(void)277 getsecs(void)
278 {
279
280 return (time(NULL));
281 }
282