1 /* $NetBSD: cpu.c,v 1.5 2002/10/02 04:19:45 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 CFATTACH_DECL(cpu, sizeof(struct cpu_softc), 50 cpu_match, cpu_attach, NULL, NULL); 51 52 int 53 cpu_match(struct device *parent, struct cfdata *cfdata, void *aux) 54 { 55 struct ofbus_attach_args *oba = aux; 56 char name[32]; 57 58 if (strcmp(oba->oba_busname, "cpu") != 0) 59 return (0); 60 61 if (OF_getprop(oba->oba_phandle, "device_type", name, 62 sizeof(name)) <= 3) 63 return (0); 64 65 if (strcmp(name, "cpu") == 0) 66 return (1); 67 68 return (0); 69 } 70 71 void 72 cpu_attach(struct device *parent, struct device *self, void *aux) 73 { 74 struct cpu_softc *sc = (struct cpu_softc *) self; 75 struct ofbus_attach_args *oba = aux; 76 unsigned char data[4]; 77 int tbase, cpunum; 78 79 sc->sc_ofnode = oba->oba_phandle; 80 81 if (OF_getprop(sc->sc_ofnode, "reg", 82 data, sizeof(data)) < sizeof(data)) { 83 printf(": unable to get CPU ID\n"); 84 return; 85 } 86 cpunum = of_decode_int(data); 87 88 cpu_attach_common(self, cpunum); 89 90 if (OF_getprop(oba->oba_phandle, "timebase-frequency", 91 data, sizeof(data)) < sizeof(data)) 92 printf("%s: unable to get timebase-frequence property\n", 93 sc->sc_dev.dv_xname); 94 else { 95 tbase = of_decode_int(data); 96 if (cpu_timebase == 0) 97 cpu_timebase = tbase; 98 else if (tbase != cpu_timebase) 99 printf("%s: WARNING: timebase %d != %d\n", 100 sc->sc_dev.dv_xname, tbase, cpu_timebase); 101 } 102 } 103