NetBSD/sys/arch/playstation2/ee/timer.c

152 lines
4.1 KiB
C

/* $NetBSD: timer.c,v 1.2 2003/07/15 02:54:37 lukem Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by UCHIYAMA Yasushi.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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>
__KERNEL_RCSID(0, "$NetBSD: timer.c,v 1.2 2003/07/15 02:54:37 lukem Exp $");
#include "debug_playstation2.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <playstation2/playstation2/interrupt.h>
#include <playstation2/ee/eevar.h>
#include <playstation2/ee/intcvar.h>
#include <playstation2/ee/timervar.h>
#include <playstation2/ee/timerreg.h>
#ifdef DEBUG
#define STATIC
#else
#define STATIC static
#endif
STATIC int timer0_intr(void *);
/*
* EE timer usage
* 0 ... 100 Hz clock interrupt.
* 1 ... one shot interrupt for software interrupt for IPL_SOFT
* 2 ... for IPL_SOFTCLOCK
* 3 ... for IPL_SOFTNET, IPL_SOFTSERIAL
*/
void
timer_init()
{
_reg_write_4(T0_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF));
_reg_write_4(T1_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF));
_reg_write_4(T2_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF));
_reg_write_4(T3_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF));
}
void
timer_clock_init()
{
/* clock interrupt (296.912MHz / 2 / 256) * 5760 = 100Hz */
intc_intr_establish(I_CH9_TIMER0, IPL_CLOCK, timer0_intr, 0);
_reg_write_4(T0_COUNT_REG, 0);
_reg_write_4(T0_COMP_REG, 5760);
_reg_write_4(T0_MODE_REG, T_MODE_CLKS_BUSCLK256 | T_MODE_ZRET |
T_MODE_CUE | T_MODE_CMPE);
}
void
timer_one_shot(int timer)
{
KDASSERT(LEGAL_TIMER(timer) && timer != 0);
_reg_write_4(T_COUNT_REG(timer), 0);
_reg_write_4(T_COMP_REG(timer), 1);
_reg_write_4(T_MODE_REG(timer), T_MODE_CUE | T_MODE_CMPE);
}
/*
* interrupt handler for clock interrupt (100Hz)
*/
int
timer0_intr(void *arg)
{
_reg_write_4(T0_MODE_REG, _reg_read_4(T0_MODE_REG) | T_MODE_EQUF);
_playstation2_evcnt.clock.ev_count++;
hardclock(&playstation2_clockframe);
return (1);
}
/* one shot timer interrupt for software interrupt */
int
timer1_intr(void *arg)
{
_reg_write_4(T1_MODE_REG, T_MODE_EQUF | T_MODE_OVFF);
softintr_dispatch(0); /* IPL_SOFT */
return (1);
}
int
timer2_intr(void *arg)
{
_reg_write_4(T2_MODE_REG, T_MODE_EQUF | T_MODE_OVFF);
softintr_dispatch(1); /* IPL_SOFTCLOCK */
return (1);
}
int
timer3_intr(void *arg)
{
_reg_write_4(T3_MODE_REG, T_MODE_EQUF | T_MODE_OVFF);
softintr_dispatch(3); /* IPL_SOFTSERIAL */
softintr_dispatch(2); /* IPL_SOFTNET */
return (1);
}