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/*-
* Copyright (c) 2005 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/clock.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/clock.h>
#include <sys/timetc.h>
#include <sys/pcpu.h>
#include <machine/clock.h>
#include <machine/cpu.h>
#include <machine/efi.h>
uint64_t ia64_clock_reload;
static int clock_initialized = 0;
#ifndef SMP
static timecounter_get_t ia64_get_timecount;
static struct timecounter ia64_timecounter = {
ia64_get_timecount, /* get_timecount */
0, /* no poll_pps */
~0u, /* counter_mask */
0, /* frequency */
"ITC" /* name */
};
static unsigned
ia64_get_timecount(struct timecounter* tc)
{
return ia64_get_itc();
}
#endif
void
pcpu_initclock(void)
{
PCPU_SET(clockadj, 0);
PCPU_SET(clock, ia64_get_itc());
ia64_set_itm(PCPU_GET(clock) + ia64_clock_reload);
ia64_set_itv(CLOCK_VECTOR); /* highest priority class */
ia64_srlz_d();
}
/*
* Start the real-time and statistics clocks. We use cr.itc and cr.itm
* to implement a 1000hz clock.
*/
void
cpu_initclocks()
{
if (itc_frequency == 0)
panic("Unknown clock frequency");
stathz = hz;
ia64_clock_reload = (itc_frequency + hz/2) / hz;
#ifndef SMP
ia64_timecounter.tc_frequency = itc_frequency;
tc_init(&ia64_timecounter);
#endif
pcpu_initclock();
}
void
cpu_startprofclock(void)
{
/* nothing to do */
}
void
cpu_stopprofclock(void)
{
/* nothing to do */
}
void
inittodr(time_t base)
{
long days;
struct efi_tm tm;
struct timespec ts;
struct clocktime ct;
efi_get_time(&tm);
/*
* This code was written in 2005, so logically EFI cannot return
* a year smaller than that. Assume the EFI clock is out of whack
* in that case and reset the EFI clock.
*/
if (tm.tm_year < 2005) {
printf("WARNING: CHECK AND RESET THE DATE!\n");
memset(&tm, 0, sizeof(tm));
tm.tm_year = 2005;
tm.tm_mon = tm.tm_mday = 1;
if (efi_set_time(&tm))
printf("ERROR: COULD NOT RESET EFI CLOCK!\n");
}
ct.nsec = tm.tm_nsec;
ct.sec = tm.tm_sec;
ct.min = tm.tm_min;
ct.hour = tm.tm_hour;
ct.day = tm.tm_mday;
ct.mon = tm.tm_mon;
ct.year = tm.tm_year;
ct.dow = -1;
if (clock_ct_to_ts(&ct, &ts))
printf("Invalid time in clock: check and reset the date!\n");
ts.tv_sec += utc_offset();
/*
* The EFI clock is supposed to be a real-time clock, whereas the
* base argument is coming from a saved (as on disk) time. It's
* impossible for a saved time to represent a time in the future,
* so we expect the EFI clock to be larger. If not, the EFI clock
* may not be reliable and we trust the base.
* Warn if the EFI clock was off by 2 or more days.
*/
if (ts.tv_sec < base) {
days = (base - ts.tv_sec) / (60L * 60L * 24L);
if (days >= 2)
printf("WARNING: EFI clock lost %ld days!\n", days);
ts.tv_sec = base;
ts.tv_nsec = 0;
}
tc_setclock(&ts);
clock_initialized = 1;
}
/*
* Reset the TODR based on the time value; used when the TODR has a
* preposterous value and also when the time is reset by the stime
* system call. Also called when the TODR goes past
* TODRZERO + 100*(SECYEAR+2*SECDAY) (e.g. on Jan 2 just after midnight)
* to wrap the TODR around.
*/
void
resettodr()
{
struct timespec ts;
struct clocktime ct;
struct efi_tm tm;
if (!clock_initialized || disable_rtc_set)
return;
efi_get_time(&tm);
getnanotime(&ts);
ts.tv_sec -= utc_offset();
clock_ts_to_ct(&ts, &ct);
tm.tm_nsec = ts.tv_nsec;
tm.tm_sec = ct.sec;
tm.tm_min = ct.min;
tm.tm_hour = ct.hour;
tm.tm_year = ct.year;
tm.tm_mon = ct.mon;
tm.tm_mday = ct.day;
if (efi_set_time(&tm))
printf("ERROR: COULD NOT RESET EFI CLOCK!\n");
}
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