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/*

 *  linux/arch/m68knommu/kernel/time.c

 *

 *  Copyright (C) 1991, 1992, 1995  Linus Torvalds

 *

 * This file contains the m68k-specific time handling details.

 * Most of the stuff is located in the machine specific files.

 *

 * 1997-09-10   Updated NTP code according to technical memorandum Jan '96

 *              "A Kernel Model for Precision Timekeeping" by Dave Mills

 */

#include <linux/errno.h>

#include <linux/module.h>

#include <linux/sched.h>

#include <linux/kernel.h>

#include <linux/param.h>

#include <linux/string.h>

#include <linux/mm.h>

#include <linux/profile.h>

#include <linux/time.h>

#include <linux/timex.h>

#include <asm/machdep.h>

#include <asm/irq_regs.h>

#define TICK_SIZE (tick_nsec / 1000)

static inline int set_rtc_mmss(unsigned long nowtime)

{

        if (mach_set_clock_mmss)

                return mach_set_clock_mmss (nowtime);

        return -1;

}

#ifndef CONFIG_GENERIC_CLOCKEVENTS

/*

 * timer_interrupt() needs to keep up the real-time clock,

 * as well as call the "do_timer()" routine every clocktick

 */

irqreturn_t arch_timer_interrupt(int irq, void *dummy)

{

        unsigned long flags;

        if (current->pid)

                profile_tick(CPU_PROFILING);

        write_seqlock_irqsave(&xtime_lock, flags);

        do_timer(1);

#ifndef CONFIG_SMP

        update_process_times(user_mode(get_irq_regs()));

#endif

        write_sequnlock_irqrestore(&xtime_lock, flags);

        return(IRQ_HANDLED);

}

#endif

static unsigned long read_rtc_mmss(void)

{

        unsigned int year, mon, day, hour, min, sec;

        if (mach_gettod)

                mach_gettod(&year, &mon, &day, &hour, &min, &sec);

        else

                year = mon = day = hour = min = sec = 0;

        if ((year += 1900) < 1970)

                year += 100;

        return  mktime(year, mon, day, hour, min, sec);

}

void read_persistent_clock(struct timespec *ts)

{

        ts->tv_sec = read_rtc_mmss();

        ts->tv_nsec = 0;

}

int update_persistent_clock(struct timespec now)

{

        return set_rtc_mmss(now.tv_sec);

}

void time_init(void)

{

        hw_timer_init();

}