1 /* $NetBSD: gbus.c,v 1.13 2002/10/02 04:06:40 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 1.13 2002/10/02 04:06:40 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 CFATTACH_DECL(gbus, sizeof(struct gbus_softc), 68 gbusmatch, gbusattach, NULL, NULL); 69 70 static int gbusprint __P((void *, const char *)); 71 static int gbussubmatch __P((struct device *, struct cfdata *, void *)); 72 73 struct gbus_attach_args gbus_children[] = { 74 { "zsc", GBUS_DUART0_OFFSET }, 75 { "zsc", GBUS_DUART1_OFFSET }, 76 { "mcclock", GBUS_CLOCK_OFFSET }, 77 { NULL, 0 }, 78 }; 79 80 static int 81 gbusprint(aux, pnp) 82 void *aux; 83 const char *pnp; 84 { 85 struct gbus_attach_args *ga = aux; 86 87 if (pnp) 88 printf("%s at %s", ga->ga_name, pnp); 89 printf(" offset 0x%lx", ga->ga_offset); 90 return (UNCONF); 91 } 92 93 static int 94 gbusmatch(parent, cf, aux) 95 struct device *parent; 96 struct cfdata *cf; 97 void *aux; 98 { 99 struct tlsb_dev_attach_args *ta = aux; 100 101 /* 102 * Make sure we're looking for a Gbus. The Gbus only 103 * "exists" on the CPU module that holds the primary CPU. 104 * 105 * Compute which node this should exist on by dividing the 106 * primary CPU by 2 (since there are up to 2 CPUs per CPU 107 * module). 108 */ 109 if (TLDEV_ISCPU(ta->ta_dtype) && 110 ta->ta_node == (hwrpb->rpb_primary_cpu_id / 2)) 111 return (1); 112 113 return (0); 114 } 115 116 static void 117 gbusattach(parent, self, aux) 118 struct device *parent; 119 struct device *self; 120 void *aux; 121 { 122 struct gbus_softc *sc = (struct gbus_softc *)self; 123 struct tlsb_dev_attach_args *ta = aux; 124 struct gbus_attach_args *ga; 125 126 printf("\n"); 127 128 sc->sc_tlsbnode = ta->ta_node; 129 130 /* Attach the children. */ 131 for (ga = gbus_children; ga->ga_name != NULL; ga++) 132 (void) config_found_sm(self, ga, gbusprint, gbussubmatch); 133 } 134 135 static int 136 gbussubmatch(parent, cf, aux) 137 struct device *parent; 138 struct cfdata *cf; 139 void *aux; 140 { 141 struct gbus_attach_args *ga = aux; 142 143 if (cf->cf_loc[GBUSCF_OFFSET] != GBUSCF_OFFSET_DEFAULT && 144 cf->cf_loc[GBUSCF_OFFSET] != ga->ga_offset) 145 return (0); 146 147 return (config_match(parent, cf, aux)); 148 } 149