3153863567
- Drop all '@brief's, they're not needed as we use JAVADOC_AUTOBRIEF. The first sentence of every description will be treated as the '@brief' automatically. - Also, put all documentation/descriptions on top of the Doxygen-comments, and put the '@foo' keywords at the bottom of the comments for consistency. - Change comments for SEEK_SET/SEEK_CUR/SEEK_END from '/**@def' to '/**<' in order to make them appear in the output. - Drop all explicit '@struct' lines (which are optional; Doxygen will figure out that it's a struct if the comment is right before the struct). - Fix various typos, whitespace issues, etc. - Fix incorrect @param variable names, e.g. change '@param n foobar' to '@param s foobar' if the variable is named 's'. Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3555 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/**
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* @file libc/time.c
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* General time functions
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*/
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#include <config.h>
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#include <libpayload.h>
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#include <arch/rdtsc.h>
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extern u32 cpu_khz;
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static struct {
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u64 ticks;
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time_t secs;
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suseconds_t usecs;
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} clock;
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#define TICKS_PER_SEC (cpu_khz * 1000)
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#define TICKS_PER_USEC (cpu_khz / 1000)
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static void update_clock(void)
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{
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u64 delta = rdtsc() - clock.ticks;
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int secs;
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clock.ticks += delta;
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secs = (int) (delta / TICKS_PER_SEC);
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clock.secs += secs;
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delta -= (secs * TICKS_PER_SEC);
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clock.usecs += (int) (delta / TICKS_PER_USEC);
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if (clock.usecs > 1000000) {
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clock.usecs -= 1000000;
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clock.secs++;
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}
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}
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#ifdef CONFIG_NVRAM
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static unsigned int day_of_year(int mon, int day, int year)
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{
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static u8 mdays[12] = { 31, 28, 31, 30, 31, 30,
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31, 31, 30, 31, 30, 31 };
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int i, ret = 0;
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for(i = 0; i < mon; i++) {
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ret += mdays[i];
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if (i == 1 && (year % 4))
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ret++;
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}
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return (ret + day);
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}
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static void gettimeofday_init(void)
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{
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int days, delta;
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struct tm tm;
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rtc_read_clock(&tm);
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clock.ticks = rdtsc();
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/* Calculate the number of days in the year so far */
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days = day_of_year(tm.tm_mon, tm.tm_mday, tm.tm_year + 1900);
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delta = tm.tm_year - 70;
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days += (delta * 365);
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/* Figure leap years */
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if (delta > 2)
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days += (delta - 2) / 4;
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clock.secs = (days * 86400) + (tm.tm_hour * 3600) +
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(tm.tm_min * 60) + tm.tm_sec;
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}
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#else
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static void gettimeofday_init(void)
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{
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/* Record the number of ticks */
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clock.ticks = rdtsc();
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}
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#endif
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/**
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* Return the current time broken into a timeval structure.
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*
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* @param tv A pointer to a timeval structure.
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* @param tz Added for compatability - not used.
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* @return 0 for success (this function cannot return non-zero currently).
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*/
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int gettimeofday(struct timeval *tv, void *tz)
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{
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/*
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* Call the gtod init when we need it - this keeps the code from
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* being included in the binary if we don't need it.
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*/
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if (!clock.ticks)
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gettimeofday_init();
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update_clock();
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tv->tv_sec = clock.secs;
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tv->tv_usec = clock.usecs;
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return 0;
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}
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