1 /* $NetBSD: intreg.c,v 1.17 2001/09/05 13:21:09 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass and Gordon W. Ross. 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 /* 40 * This handles multiple attach of autovectored interrupts, 41 * and the handy software interrupt request register. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/device.h> 47 #include <sys/vmmeter.h> 48 49 #include <uvm/uvm_extern.h> 50 51 #include <m68k/asm_single.h> 52 53 #include <machine/autoconf.h> 54 #include <machine/cpu.h> 55 #include <machine/mon.h> 56 57 #include <sun3/sun3/interreg.h> 58 #include <sun3/sun3/machdep.h> 59 60 struct intreg_softc { 61 struct device sc_dev; 62 volatile u_char *sc_reg; 63 }; 64 65 static int intreg_match __P((struct device *, struct cfdata *, void *)); 66 static void intreg_attach __P((struct device *, struct device *, void *)); 67 static int soft1intr __P((void *)); 68 69 struct cfattach intreg_ca = { 70 sizeof(struct intreg_softc), intreg_match, intreg_attach 71 }; 72 73 volatile u_char *interrupt_reg; 74 int intreg_attached; 75 76 /* called early (by internal_configure) */ 77 void 78 intreg_init() 79 { 80 interrupt_reg = obio_find_mapping(IREG_ADDR, 1); 81 if (!interrupt_reg) { 82 mon_printf("intreg_init\n"); 83 sunmon_abort(); 84 } 85 /* Turn off all interrupts until clock_attach */ 86 *interrupt_reg = 0; 87 } 88 89 90 static int 91 intreg_match(parent, cf, args) 92 struct device *parent; 93 struct cfdata *cf; 94 void *args; 95 { 96 struct confargs *ca = args; 97 98 /* This driver only supports one instance. */ 99 if (intreg_attached) 100 return (0); 101 102 /* Validate the given address. */ 103 if (ca->ca_paddr != IREG_ADDR) 104 return (0); 105 106 return (1); 107 } 108 109 110 static void 111 intreg_attach(parent, self, args) 112 struct device *parent; 113 struct device *self; 114 void *args; 115 { 116 struct intreg_softc *sc = (void *)self; 117 118 printf("\n"); 119 120 sc->sc_reg = interrupt_reg; 121 122 /* Install handler for our "soft" interrupt. */ 123 isr_add_autovect(soft1intr, (void *)sc, 1); 124 intreg_attached = 1; 125 } 126 127 128 /* 129 * Level 1 software interrupt. 130 * Possible reasons: 131 * Network software interrupt 132 * Soft clock interrupt 133 */ 134 static int 135 soft1intr(arg) 136 void *arg; 137 { 138 union sun3sir sir; 139 int s; 140 141 s = splhigh(); 142 sir.sir_any = sun3sir.sir_any; 143 sun3sir.sir_any = 0; 144 isr_soft_clear(1); 145 splx(s); 146 147 if (sir.sir_any) { 148 uvmexp.softs++; 149 if (sir.sir_which[SIR_NET]) { 150 sir.sir_which[SIR_NET] = 0; 151 netintr(); 152 } 153 if (sir.sir_which[SIR_CLOCK]) { 154 sir.sir_which[SIR_CLOCK] = 0; 155 softclock(NULL); 156 } 157 if (sir.sir_which[SIR_SPARE2]) { 158 sir.sir_which[SIR_SPARE2] = 0; 159 /* spare2intr(); */ 160 } 161 if (sir.sir_which[SIR_SPARE3]) { 162 sir.sir_which[SIR_SPARE3] = 0; 163 /* spare3intr(); */ 164 } 165 return (1); 166 } 167 return(0); 168 } 169 170 171 void isr_soft_request(level) 172 int level; 173 { 174 u_char bit; 175 176 if ((level < 1) || (level > 3)) 177 return; 178 179 bit = 1 << level; 180 single_inst_bset_b(*interrupt_reg, bit); 181 } 182 183 void isr_soft_clear(level) 184 int level; 185 { 186 u_char bit; 187 188 if ((level < 1) || (level > 3)) 189 return; 190 191 bit = 1 << level; 192 single_inst_bclr_b(*interrupt_reg, bit); 193 } 194 195