1 /* $NetBSD: cpu.c,v 1.3 2001/10/22 14:46:09 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2000, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by NONAKA Kimihiro; by Jason R. Thorpe. 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/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 43 #include <dev/ofw/openfirm.h> 44 #include <machine/cpu.h> 45 46 static int cpu_match(struct device *, struct cfdata *, void *); 47 static void cpu_attach(struct device *, struct device *, void *); 48 49 struct cfattach cpu_ca = { 50 sizeof(struct cpu_softc), cpu_match, cpu_attach 51 }; 52 53 int 54 cpu_match(struct device *parent, struct cfdata *cfdata, void *aux) 55 { 56 struct ofbus_attach_args *oba = aux; 57 char name[32]; 58 59 if (strcmp(oba->oba_busname, "cpu") != 0) 60 return (0); 61 62 if (OF_getprop(oba->oba_phandle, "device_type", name, 63 sizeof(name)) <= 3) 64 return (0); 65 66 if (strcmp(name, "cpu") == 0) 67 return (1); 68 69 return (0); 70 } 71 72 void 73 cpu_attach(struct device *parent, struct device *self, void *aux) 74 { 75 struct cpu_softc *sc = (struct cpu_softc *) self; 76 struct ofbus_attach_args *oba = aux; 77 unsigned char data[4]; 78 int tbase, cpunum; 79 80 sc->sc_ofnode = oba->oba_phandle; 81 82 if (OF_getprop(sc->sc_ofnode, "reg", 83 data, sizeof(data)) < sizeof(data)) { 84 printf(": unable to get CPU ID\n"); 85 return; 86 } 87 cpunum = of_decode_int(data); 88 89 cpu_attach_common(self, cpunum); 90 91 if (OF_getprop(oba->oba_phandle, "timebase-frequency", 92 data, sizeof(data)) < sizeof(data)) 93 printf("%s: unable to get timebase-frequence property\n", 94 sc->sc_dev.dv_xname); 95 else { 96 tbase = of_decode_int(data); 97 if (cpu_timebase == 0) 98 cpu_timebase = tbase; 99 else if (tbase != cpu_timebase) 100 printf("%s: WARNING: timebase %d != %d\n", 101 sc->sc_dev.dv_xname, tbase, cpu_timebase); 102 } 103 } 104