1 /* $NetBSD: timer.c,v 1.8 2014/03/31 11:25:49 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: timer.c,v 1.8 2014/03/31 11:25:49 martin Exp $"); 34 35 #include "debug_playstation2.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 40 #include <playstation2/playstation2/interrupt.h> 41 42 #include <playstation2/ee/eevar.h> 43 #include <playstation2/ee/intcvar.h> 44 #include <playstation2/ee/timervar.h> 45 #include <playstation2/ee/timerreg.h> 46 47 48 #ifdef DEBUG 49 #define STATIC 50 #else 51 #define STATIC static 52 #endif 53 54 STATIC int timer0_intr(void *); 55 56 /* 57 * EE timer usage 58 * 0 ... 100 Hz clock interrupt. 59 * 1 ... one shot interrupt for software interrupt for IPL_SOFT 60 * 2 ... for IPL_SOFTCLOCK 61 * 3 ... for IPL_SOFTNET, IPL_SOFTSERIAL 62 */ 63 64 void 65 timer_init(void) 66 { 67 68 _reg_write_4(T0_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF)); 69 _reg_write_4(T1_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF)); 70 _reg_write_4(T2_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF)); 71 _reg_write_4(T3_MODE_REG, (T_MODE_EQUF | T_MODE_OVFF)); 72 } 73 74 void 75 timer_clock_init(void) 76 { 77 /* clock interrupt (296.912MHz / 2 / 256) * 5760 = 100Hz */ 78 intc_intr_establish(I_CH9_TIMER0, IPL_CLOCK, timer0_intr, 0); 79 _reg_write_4(T0_COUNT_REG, 0); 80 _reg_write_4(T0_COMP_REG, 5760); 81 _reg_write_4(T0_MODE_REG, T_MODE_CLKS_BUSCLK256 | T_MODE_ZRET | 82 T_MODE_CUE | T_MODE_CMPE); 83 } 84 85 void 86 timer_one_shot(int timer) 87 { 88 KDASSERT(LEGAL_TIMER(timer) && timer != 0); 89 90 _reg_write_4(T_COUNT_REG(timer), 0); 91 _reg_write_4(T_COMP_REG(timer), 1); 92 _reg_write_4(T_MODE_REG(timer), T_MODE_CUE | T_MODE_CMPE); 93 } 94 95 /* 96 * interrupt handler for clock interrupt (100Hz) 97 */ 98 int 99 timer0_intr(void *arg) 100 { 101 102 _reg_write_4(T0_MODE_REG, _reg_read_4(T0_MODE_REG) | T_MODE_EQUF); 103 104 _playstation2_evcnt.clock.ev_count++; 105 106 hardclock(&playstation2_clockframe); 107 108 return (1); 109 } 110 111 /* one shot timer interrupt for software interrupt */ 112 int 113 timer1_intr(void *arg) 114 { 115 116 _reg_write_4(T1_MODE_REG, T_MODE_EQUF | T_MODE_OVFF); 117 118 #ifdef __HAVE_FAST_SOFTINTS 119 softintr_dispatch(0); /* IPL_SOFT */ 120 #endif 121 122 return (1); 123 } 124 125 int 126 timer2_intr(void *arg) 127 { 128 129 _reg_write_4(T2_MODE_REG, T_MODE_EQUF | T_MODE_OVFF); 130 131 #ifdef __HAVE_FAST_SOFTINTS 132 softintr_dispatch(1); /* IPL_SOFTCLOCK */ 133 #endif 134 return (1); 135 } 136 137 int 138 timer3_intr(void *arg) 139 { 140 141 _reg_write_4(T3_MODE_REG, T_MODE_EQUF | T_MODE_OVFF); 142 143 #ifdef __HAVE_FAST_SOFTINTS 144 softintr_dispatch(3); /* IPL_SOFTSERIAL */ 145 softintr_dispatch(2); /* IPL_SOFTNET */ 146 #endif 147 148 return (1); 149 } 150