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__FBSDID("$FreeBSD: stable/11/stand/efi/libefi/time_event.c 329010 2018-02-08 02:44:21Z kevans $");
29
30#include <efi.h>
31#include <efilib.h>
32
33#include <time.h>
34#include <sys/time.h>
35
36static EFI_EVENT time_event;
37static uint64_t curtime;
38
39static void
40time_update(EFI_EVENT event, void *context)
41{
42
43	curtime += 10;
44}
45
46void
47efi_time_init(void)
48{
49
50	/* Create a timer event */
51	BS->CreateEvent(EVT_TIMER | EVT_NOTIFY_SIGNAL, TPL_CALLBACK,
52	    time_update, 0, &time_event);
53	/* Use a 10ms timer */
54	BS->SetTimer(time_event, TimerPeriodic, 100000);
55}
56
57void
58efi_time_fini(void)
59{
60
61	/* Cancel the timer */
62	BS->SetTimer(time_event, TimerCancel, 0);
63	BS->CloseEvent(time_event);
64}
65
66time_t
67time(time_t *tloc)
68{
69	time_t t;
70
71	t = curtime / 1000;
72	if (tloc != NULL)
73		*tloc = t;
74
75	return (t);
76}
77
78time_t
79getsecs(void)
80{
81    return time(0);
82}
83