152 lines
4.1 KiB
C
152 lines
4.1 KiB
C
/* $NetBSD: timer.c,v 1.2 2003/07/15 02:54:37 lukem Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by UCHIYAMA Yasushi.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: timer.c,v 1.2 2003/07/15 02:54:37 lukem Exp $");
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#include "debug_playstation2.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <playstation2/playstation2/interrupt.h>
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#include <playstation2/ee/eevar.h>
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#include <playstation2/ee/intcvar.h>
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#include <playstation2/ee/timervar.h>
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#include <playstation2/ee/timerreg.h>
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#ifdef DEBUG
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#define STATIC
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#else
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#define STATIC static
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#endif
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STATIC int timer0_intr(void *);
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/*
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* EE timer usage
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* 0 ... 100 Hz clock interrupt.
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* 1 ... one shot interrupt for software interrupt for IPL_SOFT
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* 2 ... for IPL_SOFTCLOCK
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* 3 ... for IPL_SOFTNET, IPL_SOFTSERIAL
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*/
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void
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timer_init()
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{
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_reg_write_4(T0_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF));
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_reg_write_4(T1_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF));
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_reg_write_4(T2_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF));
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_reg_write_4(T3_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF));
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}
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void
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timer_clock_init()
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{
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/* clock interrupt (296.912MHz / 2 / 256) * 5760 = 100Hz */
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intc_intr_establish(I_CH9_TIMER0, IPL_CLOCK, timer0_intr, 0);
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_reg_write_4(T0_COUNT_REG, 0);
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_reg_write_4(T0_COMP_REG, 5760);
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_reg_write_4(T0_MODE_REG, T_MODE_CLKS_BUSCLK256 | T_MODE_ZRET |
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T_MODE_CUE | T_MODE_CMPE);
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}
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void
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timer_one_shot(int timer)
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{
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KDASSERT(LEGAL_TIMER(timer) && timer != 0);
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_reg_write_4(T_COUNT_REG(timer), 0);
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_reg_write_4(T_COMP_REG(timer), 1);
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_reg_write_4(T_MODE_REG(timer), T_MODE_CUE | T_MODE_CMPE);
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}
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/*
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* interrupt handler for clock interrupt (100Hz)
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*/
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int
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timer0_intr(void *arg)
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{
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_reg_write_4(T0_MODE_REG, _reg_read_4(T0_MODE_REG) | T_MODE_EQUF);
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_playstation2_evcnt.clock.ev_count++;
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hardclock(&playstation2_clockframe);
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return (1);
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}
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/* one shot timer interrupt for software interrupt */
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int
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timer1_intr(void *arg)
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{
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_reg_write_4(T1_MODE_REG, T_MODE_EQUF | T_MODE_OVFF);
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softintr_dispatch(0); /* IPL_SOFT */
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return (1);
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}
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int
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timer2_intr(void *arg)
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{
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_reg_write_4(T2_MODE_REG, T_MODE_EQUF | T_MODE_OVFF);
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softintr_dispatch(1); /* IPL_SOFTCLOCK */
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return (1);
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}
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int
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timer3_intr(void *arg)
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{
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_reg_write_4(T3_MODE_REG, T_MODE_EQUF | T_MODE_OVFF);
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softintr_dispatch(3); /* IPL_SOFTSERIAL */
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softintr_dispatch(2); /* IPL_SOFTNET */
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return (1);
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}
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