1 /* $NetBSD: intreg.c,v 1.9 1997/03/04 23:37:50 gwr 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 <m68k/asm_single.h> 50 51 #include <machine/autoconf.h> 52 #include <machine/cpu.h> 53 #include <machine/mon.h> 54 #include <machine/obio.h> 55 #include <machine/machdep.h> 56 57 #include <sun3/sun3/interreg.h> 58 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 struct cfdriver intreg_cd = { 74 NULL, "intreg", DV_DULL 75 }; 76 77 volatile u_char *interrupt_reg; 78 79 80 /* called early (by internal_configure) */ 81 void 82 intreg_init() 83 { 84 interrupt_reg = obio_find_mapping(OBIO_INTERREG, 1); 85 if (!interrupt_reg) { 86 mon_printf("intreg_init\n"); 87 sunmon_abort(); 88 } 89 /* Turn off all interrupts until clock_attach */ 90 *interrupt_reg = 0; 91 } 92 93 94 static int 95 intreg_match(parent, cf, args) 96 struct device *parent; 97 struct cfdata *cf; 98 void *args; 99 { 100 struct confargs *ca = args; 101 102 /* This driver only supports one unit. */ 103 if (cf->cf_unit != 0) 104 return (0); 105 106 /* Validate the given address. */ 107 if (ca->ca_paddr != OBIO_INTERREG) 108 return (0); 109 110 return (1); 111 } 112 113 114 static void 115 intreg_attach(parent, self, args) 116 struct device *parent; 117 struct device *self; 118 void *args; 119 { 120 struct intreg_softc *sc = (void *)self; 121 122 printf("\n"); 123 124 sc->sc_reg = interrupt_reg; 125 126 /* Install handler for our "soft" interrupt. */ 127 isr_add_autovect(soft1intr, (void *)sc, 1); 128 } 129 130 131 /* 132 * Level 1 software interrupt. 133 * Possible reasons: 134 * Network software interrupt 135 * Soft clock interrupt 136 */ 137 static int 138 soft1intr(arg) 139 void *arg; 140 { 141 union sun3sir sir; 142 int s; 143 144 s = splhigh(); 145 sir.sir_any = sun3sir.sir_any; 146 sun3sir.sir_any = 0; 147 isr_soft_clear(1); 148 splx(s); 149 150 if (sir.sir_any) { 151 cnt.v_soft++; 152 if (sir.sir_which[SIR_NET]) { 153 sir.sir_which[SIR_NET] = 0; 154 netintr(); 155 } 156 if (sir.sir_which[SIR_CLOCK]) { 157 sir.sir_which[SIR_CLOCK] = 0; 158 softclock(); 159 } 160 if (sir.sir_which[SIR_SPARE2]) { 161 sir.sir_which[SIR_SPARE2] = 0; 162 /* spare2intr(); */ 163 } 164 if (sir.sir_which[SIR_SPARE3]) { 165 sir.sir_which[SIR_SPARE3] = 0; 166 /* spare3intr(); */ 167 } 168 return (1); 169 } 170 return(0); 171 } 172 173 174 void isr_soft_request(level) 175 int level; 176 { 177 register u_char bit; 178 179 if ((level < 1) || (level > 3)) 180 return; 181 182 bit = 1 << level; 183 single_inst_bset_b(*interrupt_reg, bit); 184 } 185 186 void isr_soft_clear(level) 187 int level; 188 { 189 register u_char bit; 190 191 if ((level < 1) || (level > 3)) 192 return; 193 194 bit = 1 << level; 195 single_inst_bclr_b(*interrupt_reg, bit); 196 } 197 198