2 * This file is part of the libpayload project.
4 * Copyright (C) 2008 Advanced Micro Devices, Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * General time functions
35 #include <libpayload-config.h>
36 #include <libpayload.h>
37 #ifdef CONFIG_TARGET_I386
38 #include <arch/rdtsc.h>
49 #define TICKS_PER_SEC (cpu_khz * 1000)
50 #define TICKS_PER_USEC (cpu_khz / 1000)
52 #ifdef CONFIG_TARGET_I386
53 static void update_clock(void)
55 u64 delta = rdtsc() - clock.ticks;
60 secs = (int) (delta / TICKS_PER_SEC);
62 delta -= (secs * TICKS_PER_SEC);
63 clock.usecs += (int) (delta / TICKS_PER_USEC);
65 if (clock.usecs > 1000000) {
66 clock.usecs -= 1000000;
73 static unsigned int day_of_year(int mon, int day, int year)
75 static u8 mdays[12] = { 31, 28, 31, 30, 31, 30,
76 31, 31, 30, 31, 30, 31 };
80 for(i = 0; i < mon; i++) {
83 if (i == 1 && (year % 4))
90 static void gettimeofday_init(void)
96 clock.ticks = rdtsc();
98 /* Calculate the number of days in the year so far */
99 days = day_of_year(tm.tm_mon, tm.tm_mday, tm.tm_year + 1900);
101 delta = tm.tm_year - 70;
103 days += (delta * 365);
105 /* Figure leap years */
108 days += (delta - 2) / 4;
110 clock.secs = (days * 86400) + (tm.tm_hour * 3600) +
111 (tm.tm_min * 60) + tm.tm_sec;
114 static void gettimeofday_init(void)
116 /* Record the number of ticks */
117 clock.ticks = rdtsc();
121 #ifdef CONFIG_TARGET_POWERPC
122 static void update_clock(void)
126 static void gettimeofday_init(void)
131 * Return the current time broken into a timeval structure.
133 * @param tv A pointer to a timeval structure.
134 * @param tz Added for compatability - not used.
135 * @return 0 for success (this function cannot return non-zero currently).
137 int gettimeofday(struct timeval *tv, void *tz)
140 * Call the gtod init when we need it - this keeps the code from
141 * being included in the binary if we don't need it.
148 tv->tv_sec = clock.secs;
149 tv->tv_usec = clock.usecs;