/*
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/*
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* linux/arch/i960/kernel/time.c
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* linux/arch/i960/kernel/time.c
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*
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*
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* Copyright (C) 1999 Keith Adams <kma@cse.ogi.edu>
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* Copyright (C) 1999 Keith Adams <kma@cse.ogi.edu>
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* Oregon Graduate Institute
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* Oregon Graduate Institute
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*
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*
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* Based on:
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* Based on:
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*
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*
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* linux/arch/m68knommu/kernel/time.c
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* linux/arch/m68knommu/kernel/time.c
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*
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*
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* Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,
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* Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>,
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* Kenneth Albanowski <kjahds@kjahds.com>,
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* Kenneth Albanowski <kjahds@kjahds.com>,
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* The Silver Hammer Group, Ltd.
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* The Silver Hammer Group, Ltd.
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*
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*
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* Copied/hacked from:
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* Copied/hacked from:
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*
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*
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* linux/arch/m68k/kernel/time.c
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* linux/arch/m68k/kernel/time.c
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*
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*
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* Copyright (C) 1991, 1992, 1995 Linus Torvalds
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* Copyright (C) 1991, 1992, 1995 Linus Torvalds
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*
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*
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* This file contains the i960-specific time handling details.
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* This file contains the i960-specific time handling details.
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*/
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*/
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/param.h>
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#include <linux/param.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/mm.h>
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#include <asm/machdep.h>
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#include <asm/machdep.h>
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#include <asm/segment.h>
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#include <asm/segment.h>
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#include <asm/io.h>
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#include <asm/io.h>
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#include <linux/timex.h>
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#include <linux/timex.h>
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/*
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/*
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* XXX: bloody hell. We need to have figured out our machine's MHZ, and
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* XXX: bloody hell. We need to have figured out our machine's MHZ, and
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* programmed its clock accordingly.
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* programmed its clock accordingly.
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*/
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*/
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static inline int set_rtc_mmss(unsigned long nowtime)
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static inline int set_rtc_mmss(unsigned long nowtime)
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{
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{
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return -1;
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return -1;
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}
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}
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int do_reboot = 0;
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int do_reboot = 0;
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/*
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/*
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* timer_interrupt() needs to keep up the real-time clock,
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* timer_interrupt() needs to keep up the real-time clock,
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* as well as call the "do_timer()" routine every clocktick
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* as well as call the "do_timer()" routine every clocktick
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*/
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*/
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void timer_interrupt(struct pt_regs * regs)
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void timer_interrupt(struct pt_regs * regs)
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{
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{
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/* last time the cmos clock got updated */
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/* last time the cmos clock got updated */
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static long last_rtc_update=0;
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static long last_rtc_update=0;
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do_timer(regs);
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do_timer(regs);
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/*
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/*
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* If we have an externally synchronized Linux clock, then update
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* If we have an externally synchronized Linux clock, then update
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* CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
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* CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
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* called as close as possible to 500 ms before the new second starts.
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* called as close as possible to 500 ms before the new second starts.
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*/
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*/
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if (time_state != TIME_BAD && xtime.tv_sec > last_rtc_update + 660 &&
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if (time_state != TIME_BAD && xtime.tv_sec > last_rtc_update + 660 &&
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xtime.tv_usec > 500000 - (tick >> 1) &&
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xtime.tv_usec > 500000 - (tick >> 1) &&
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xtime.tv_usec < 500000 + (tick >> 1))
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xtime.tv_usec < 500000 + (tick >> 1))
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if (set_rtc_mmss(xtime.tv_sec) == 0)
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if (set_rtc_mmss(xtime.tv_sec) == 0)
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last_rtc_update = xtime.tv_sec;
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last_rtc_update = xtime.tv_sec;
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else
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else
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last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
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last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
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}
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}
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/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
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/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
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* Assumes input in normal date format, i.e. 1980-12-31 23:59:59
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* Assumes input in normal date format, i.e. 1980-12-31 23:59:59
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* => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
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* => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
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*
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*
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* [For the Julian calendar (which was used in Russia before 1917,
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* [For the Julian calendar (which was used in Russia before 1917,
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* Britain & colonies before 1752, anywhere else before 1582,
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* Britain & colonies before 1752, anywhere else before 1582,
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* and is still in use by some communities) leave out the
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* and is still in use by some communities) leave out the
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* -year/100+year/400 terms, and add 10.]
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* -year/100+year/400 terms, and add 10.]
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*
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*
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* This algorithm was first published by Gauss (I think).
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* This algorithm was first published by Gauss (I think).
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*
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*
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* WARNING: this function will overflow on 2106-02-07 06:28:16 on
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* WARNING: this function will overflow on 2106-02-07 06:28:16 on
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* machines were long is 32-bit! (However, as time_t is signed, we
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* machines were long is 32-bit! (However, as time_t is signed, we
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* will already get problems at other places on 2038-01-19 03:14:08)
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* will already get problems at other places on 2038-01-19 03:14:08)
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*/
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*/
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static inline unsigned long mktime(unsigned int year, unsigned int mon,
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static inline unsigned long mktime(unsigned int year, unsigned int mon,
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unsigned int day, unsigned int hour,
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unsigned int day, unsigned int hour,
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unsigned int min, unsigned int sec)
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unsigned int min, unsigned int sec)
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{
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{
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if (0 >= (int) (mon -= 2)) { /* 1..12 -> 11,12,1..10 */
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if (0 >= (int) (mon -= 2)) { /* 1..12 -> 11,12,1..10 */
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mon += 12; /* Puts Feb last since it has leap day */
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mon += 12; /* Puts Feb last since it has leap day */
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year -= 1;
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year -= 1;
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}
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}
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return (((
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return (((
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(unsigned long)(year/4 - year/100 + year/400 + 367*mon/12 + day) +
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(unsigned long)(year/4 - year/100 + year/400 + 367*mon/12 + day) +
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year*365 - 719499
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year*365 - 719499
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)*24 + hour /* now have hours */
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)*24 + hour /* now have hours */
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)*60 + min /* now have minutes */
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)*60 + min /* now have minutes */
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)*60 + sec; /* finally seconds */
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)*60 + sec; /* finally seconds */
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}
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}
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void time_init(void)
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void time_init(void)
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{
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{
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unsigned int year, mon, day, hour, min, sec;
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unsigned int year, mon, day, hour, min, sec;
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extern void arch_gettod(int *year, int *mon, int *day, int *hour,
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extern void arch_gettod(int *year, int *mon, int *day, int *hour,
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int *min, int *sec);
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int *min, int *sec);
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arch_gettod (&year, &mon, &day, &hour, &min, &sec);
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arch_gettod (&year, &mon, &day, &hour, &min, &sec);
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if ((year += 1900) < 1970)
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if ((year += 1900) < 1970)
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year += 100;
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year += 100;
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xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
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xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
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xtime.tv_usec = 0;
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xtime.tv_usec = 0;
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#ifdef CONFIG_M68328
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#ifdef CONFIG_M68328
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(*((volatile unsigned short*)0xFFFFF610)) = /*0x1000;*/ 0xd7e4;
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(*((volatile unsigned short*)0xFFFFF610)) = /*0x1000;*/ 0xd7e4;
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(*((volatile unsigned short*)0xFFFFF60c)) = 0x33; /* Reset */
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(*((volatile unsigned short*)0xFFFFF60c)) = 0x33; /* Reset */
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(*((volatile unsigned short*)0xFFFFF60e)) = 0x2; /* divider */
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(*((volatile unsigned short*)0xFFFFF60e)) = 0x2; /* divider */
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(*((volatile unsigned long*)0xFFFFF304)) &= ~2; /* Enable interrupt */
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(*((volatile unsigned long*)0xFFFFF304)) &= ~2; /* Enable interrupt */
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#endif
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#endif
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#ifdef CONFIG_M68332
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#ifdef CONFIG_M68332
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*(volatile unsigned short *)0xfffa22 = 0x0140; /* ipl 6, vec 0x40 */
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*(volatile unsigned short *)0xfffa22 = 0x0140; /* ipl 6, vec 0x40 */
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*(volatile unsigned short *)0xfffa24 = 0x00a3; /* 50 Hz */
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*(volatile unsigned short *)0xfffa24 = 0x00a3; /* 50 Hz */
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#endif
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#endif
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}
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}
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/*
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/*
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* This version of gettimeofday has near microsecond resolution.
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* This version of gettimeofday has near microsecond resolution.
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*/
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*/
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void do_gettimeofday(struct timeval *tv)
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void do_gettimeofday(struct timeval *tv)
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{
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{
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unsigned long flags;
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unsigned long flags;
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save_flags(flags);
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save_flags(flags);
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cli();
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cli();
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*tv = xtime;
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*tv = xtime;
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restore_flags(flags);
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restore_flags(flags);
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}
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}
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void do_settimeofday(struct timeval *tv)
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void do_settimeofday(struct timeval *tv)
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{
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{
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cli();
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cli();
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/* This is revolting. We need to set the xtime.tv_usec
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/* This is revolting. We need to set the xtime.tv_usec
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* correctly. However, the value in this location is
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* correctly. However, the value in this location is
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* is value at the last tick.
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* is value at the last tick.
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* Discover what correction gettimeofday
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* Discover what correction gettimeofday
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* would have done, and then undo it!
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* would have done, and then undo it!
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*/
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*/
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#if 0
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#if 0
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tv->tv_usec -= mach_gettimeoffset();
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tv->tv_usec -= mach_gettimeoffset();
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#endif
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#endif
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if (tv->tv_usec < 0) {
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if (tv->tv_usec < 0) {
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tv->tv_usec += 1000000;
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tv->tv_usec += 1000000;
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tv->tv_sec--;
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tv->tv_sec--;
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}
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}
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xtime = *tv;
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xtime = *tv;
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time_state = TIME_BAD;
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time_state = TIME_BAD;
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time_maxerror = MAXPHASE;
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time_maxerror = MAXPHASE;
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time_esterror = MAXPHASE;
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time_esterror = MAXPHASE;
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sti();
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sti();
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}
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}
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