/*      $NetBSD: clock.c,v 1.1 2014/02/24 07:23:42 skrll Exp $  */

/*      $OpenBSD: clock.c,v 1.10 2001/08/31 03:13:42 mickey Exp $       */

/*
* Copyright (c) 1998-2003 Michael Shalayeff
* 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 OR HIS RELATIVES 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 MIND, 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>
__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.1 2014/02/24 07:23:42 skrll Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/time.h>
#include <sys/timetc.h>

#include <machine/pdc.h>
#include <machine/iomod.h>
#include <machine/psl.h>
#include <machine/intr.h>
#include <machine/reg.h>
#include <machine/cpufunc.h>
#include <machine/autoconf.h>

#include <hppa/hppa/machdep.h>

#if defined(DDB)
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#endif

static unsigned get_itimer_count(struct timecounter *);

void
cpu_initclocks(void)
{
       static struct timecounter tc = {
               .tc_get_timecount = get_itimer_count,
               .tc_name = "itimer",
               .tc_counter_mask = ~0,
               .tc_quality = 100,
       };

       extern u_int cpu_hzticks;
       u_int time_inval;

       tc.tc_frequency = cpu_hzticks * hz;

       /* Start the interval timer. */
       mfctl(CR_ITMR, time_inval);
       mtctl(time_inval + cpu_hzticks, CR_ITMR);

       tc_init(&tc);
}

unsigned
get_itimer_count(struct timecounter *tc)
{
       uint32_t val;

       mfctl(CR_ITMR, val);

       return val;
}

int
clock_intr(void *v)
{
       struct clockframe *frame = v;
       extern u_int cpu_hzticks;
       u_int time_inval;

       /* Restart the interval timer. */
       mfctl(CR_ITMR, time_inval);
       mtctl(time_inval + cpu_hzticks, CR_ITMR);

       /* printf ("clock int 0x%x @ 0x%x for %p\n", t,
          CLKF_PC(frame), curproc); */

       if (!cold)
               hardclock(frame);

#if 0
       ddb_regs = *frame;
       db_show_regs(NULL, 0, 0, NULL);
#endif

       /* printf ("clock out 0x%x\n", t); */

       return 1;
}

void
setstatclockrate(int newhz)
{
       /* nothing we can do */
}