1 /*
2 * Copyright (c) 2016 Andrew Turner
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28
29 #include <efi.h>
30 #include <efilib.h>
31
32 #include <time.h>
33 #include <sys/time.h>
34
35 static EFI_EVENT time_event;
36 static uint64_t curtime;
37
38 static void
time_update(EFI_EVENT event,void * context)39 time_update(EFI_EVENT event, void *context)
40 {
41
42 curtime++;
43 }
44
45 void
efi_time_init(void)46 efi_time_init(void)
47 {
48
49 /* Create a timer event */
50 BS->CreateEvent(EVT_TIMER | EVT_NOTIFY_SIGNAL, TPL_CALLBACK,
51 time_update, 0, &time_event);
52 /* Use a 1s timer */
53 BS->SetTimer(time_event, TimerPeriodic, 10000000);
54 }
55
56 void
efi_time_fini(void)57 efi_time_fini(void)
58 {
59
60 /* Cancel the timer */
61 BS->SetTimer(time_event, TimerCancel, 0);
62 BS->CloseEvent(time_event);
63 }
64
65 time_t
time(time_t * tloc)66 time(time_t *tloc)
67 {
68 time_t t;
69
70 t = curtime;
71 if (tloc != NULL)
72 *tloc = t;
73
74 return (t);
75 }
76
77 time_t
getsecs(void)78 getsecs(void)
79 {
80 return (time(0));
81 }
82