1 /* $NetBSD: timer.c,v 1.3 2005/12/11 12:18:36 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: timer.c,v 1.3 2005/12/11 12:18:36 christos Exp $"); 41 42 #include "debug_playstation2.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 47 #include <playstation2/playstation2/interrupt.h> 48 49 #include <playstation2/ee/eevar.h> 50 #include <playstation2/ee/intcvar.h> 51 #include <playstation2/ee/timervar.h> 52 #include <playstation2/ee/timerreg.h> 53 54 55 #ifdef DEBUG 56 #define STATIC 57 #else 58 #define STATIC static 59 #endif 60 61 STATIC int timer0_intr(void *); 62 63 /* 64 * EE timer usage 65 * 0 ... 100 Hz clock interrupt. 66 * 1 ... one shot interrupt for software interrupt for IPL_SOFT 67 * 2 ... for IPL_SOFTCLOCK 68 * 3 ... for IPL_SOFTNET, IPL_SOFTSERIAL 69 */ 70 71 void 72 timer_init() 73 { 74 75 _reg_write_4(T0_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF)); 76 _reg_write_4(T1_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF)); 77 _reg_write_4(T2_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF)); 78 _reg_write_4(T3_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF)); 79 } 80 81 void 82 timer_clock_init() 83 { 84 /* clock interrupt (296.912MHz / 2 / 256) * 5760 = 100Hz */ 85 intc_intr_establish(I_CH9_TIMER0, IPL_CLOCK, timer0_intr, 0); 86 _reg_write_4(T0_COUNT_REG, 0); 87 _reg_write_4(T0_COMP_REG, 5760); 88 _reg_write_4(T0_MODE_REG, T_MODE_CLKS_BUSCLK256 | T_MODE_ZRET | 89 T_MODE_CUE | T_MODE_CMPE); 90 } 91 92 void 93 timer_one_shot(int timer) 94 { 95 KDASSERT(LEGAL_TIMER(timer) && timer != 0); 96 97 _reg_write_4(T_COUNT_REG(timer), 0); 98 _reg_write_4(T_COMP_REG(timer), 1); 99 _reg_write_4(T_MODE_REG(timer), T_MODE_CUE | T_MODE_CMPE); 100 } 101 102 /* 103 * interrupt handler for clock interrupt (100Hz) 104 */ 105 int 106 timer0_intr(void *arg) 107 { 108 109 _reg_write_4(T0_MODE_REG, _reg_read_4(T0_MODE_REG) | T_MODE_EQUF); 110 111 _playstation2_evcnt.clock.ev_count++; 112 113 hardclock(&playstation2_clockframe); 114 115 return (1); 116 } 117 118 /* one shot timer interrupt for software interrupt */ 119 int 120 timer1_intr(void *arg) 121 { 122 123 _reg_write_4(T1_MODE_REG, T_MODE_EQUF | T_MODE_OVFF); 124 125 softintr_dispatch(0); /* IPL_SOFT */ 126 127 return (1); 128 } 129 130 int 131 timer2_intr(void *arg) 132 { 133 134 _reg_write_4(T2_MODE_REG, T_MODE_EQUF | T_MODE_OVFF); 135 136 softintr_dispatch(1); /* IPL_SOFTCLOCK */ 137 138 return (1); 139 } 140 141 int 142 timer3_intr(void *arg) 143 { 144 145 _reg_write_4(T3_MODE_REG, T_MODE_EQUF | T_MODE_OVFF); 146 147 softintr_dispatch(3); /* IPL_SOFTSERIAL */ 148 softintr_dispatch(2); /* IPL_SOFTNET */ 149 150 return (1); 151 } 152