1 /* $NetBSD: gbus.c,v 1.10 2001/07/19 20:34:08 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1997 by Matthew Jacob 5 * NASA AMES Research Center. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice immediately at the beginning of the file, without modification, 13 * this list of conditions, and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Autoconfiguration and support routines for the Gbus: the internal 35 * bus on AlphaServer CPU modules. 36 */ 37 38 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 39 40 __KERNEL_RCSID(0, "$NetBSD: gbus.c,v 1.10 2001/07/19 20:34:08 thorpej Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 46 #include <machine/rpb.h> 47 #include <machine/pte.h> 48 49 #include <alpha/tlsb/gbusreg.h> 50 #include <alpha/tlsb/gbusvar.h> 51 52 #include <alpha/tlsb/tlsbreg.h> 53 #include <alpha/tlsb/tlsbvar.h> 54 55 #include "locators.h" 56 57 #define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr))) 58 59 struct gbus_softc { 60 struct device sc_dev; 61 int sc_tlsbnode; /* node on the TurboLaser */ 62 }; 63 64 static int gbusmatch __P((struct device *, struct cfdata *, void *)); 65 static void gbusattach __P((struct device *, struct device *, void *)); 66 67 struct cfattach gbus_ca = { 68 sizeof(struct gbus_softc), gbusmatch, gbusattach 69 }; 70 71 static int gbusprint __P((void *, const char *)); 72 static int gbussubmatch __P((struct device *, struct cfdata *, void *)); 73 74 struct gbus_attach_args gbus_children[] = { 75 { "zsc", GBUS_DUART0_OFFSET }, 76 { "zsc", GBUS_DUART1_OFFSET }, 77 { "mcclock", GBUS_CLOCK_OFFSET }, 78 { NULL, 0 }, 79 }; 80 81 static int 82 gbusprint(aux, pnp) 83 void *aux; 84 const char *pnp; 85 { 86 struct gbus_attach_args *ga = aux; 87 88 if (pnp) 89 printf("%s at %s", ga->ga_name, pnp); 90 printf(" offset 0x%lx", ga->ga_offset); 91 return (UNCONF); 92 } 93 94 static int 95 gbusmatch(parent, cf, aux) 96 struct device *parent; 97 struct cfdata *cf; 98 void *aux; 99 { 100 struct tlsb_dev_attach_args *ta = aux; 101 102 /* 103 * Make sure we're looking for a Gbus. The Gbus only 104 * "exists" on the CPU module that holds the primary CPU. 105 * 106 * Compute which node this should exist on by dividing the 107 * primary CPU by 2 (since there are up to 2 CPUs per CPU 108 * module). 109 */ 110 if (TLDEV_ISCPU(ta->ta_dtype) && 111 ta->ta_node == (hwrpb->rpb_primary_cpu_id / 2)) 112 return (1); 113 114 return (0); 115 } 116 117 static void 118 gbusattach(parent, self, aux) 119 struct device *parent; 120 struct device *self; 121 void *aux; 122 { 123 struct gbus_softc *sc = (struct gbus_softc *)self; 124 struct tlsb_dev_attach_args *ta = aux; 125 struct gbus_attach_args *ga; 126 127 printf("\n"); 128 129 sc->sc_tlsbnode = ta->ta_node; 130 131 /* Attach the children. */ 132 for (ga = gbus_children; ga->ga_name != NULL; ga++) 133 (void) config_found_sm(self, ga, gbusprint, gbussubmatch); 134 } 135 136 static int 137 gbussubmatch(parent, cf, aux) 138 struct device *parent; 139 struct cfdata *cf; 140 void *aux; 141 { 142 struct gbus_attach_args *ga = aux; 143 144 if (cf->cf_loc[GBUSCF_OFFSET] != GBUSCF_OFFSET_DEFAULT && 145 cf->cf_loc[GBUSCF_OFFSET] != ga->ga_offset) 146 return (0); 147 148 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 149 } 150