mcbus.c revision 1.5
1 /* $NetBSD: mcbus.c,v 1.5 1999/04/10 01:21:38 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1998 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 routines for the MCBUS system 35 * bus found on AlphaServer 4100 systems. 36 */ 37 38 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 39 40 __KERNEL_RCSID(0, "$NetBSD: mcbus.c,v 1.5 1999/04/10 01:21:38 cgd Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 47 #include <machine/autoconf.h> 48 #include <machine/rpb.h> 49 #include <machine/pte.h> 50 51 #include <alpha/mcbus/mcbusreg.h> 52 #include <alpha/mcbus/mcbusvar.h> 53 54 #include "locators.h" 55 56 #define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr))) 57 58 extern struct cfdriver mcbus_cd; 59 60 struct mcbus_cpu_busdep mcbus_primary; 61 62 static int mcbusmatch __P((struct device *, struct cfdata *, void *)); 63 static void mcbusattach __P((struct device *, struct device *, void *)); 64 static int mcbusprint __P((void *, const char *)); 65 static int mcbussubmatch __P((struct device *, struct cfdata *, void *)); 66 static char *mcbus_node_type_str __P((u_int8_t)); 67 68 typedef struct { 69 struct device mcbus_dev; 70 u_int8_t mcbus_types[MCBUS_MID_MAX]; 71 } mcbus_softc_t; 72 73 struct cfattach mcbus_ca = { 74 sizeof (mcbus_softc_t), mcbusmatch, mcbusattach 75 }; 76 77 extern void mcpcia_config_cleanup __P((void)); 78 79 80 static int 81 mcbusprint(aux, cp) 82 void *aux; 83 const char *cp; 84 { 85 struct mcbus_dev_attach_args *tap = aux; 86 printf(" mid %d: %s", tap->ma_mid, mcbus_node_type_str(tap->ma_type)); 87 return (UNCONF); 88 } 89 90 static int 91 mcbussubmatch(parent, cf, aux) 92 struct device *parent; 93 struct cfdata *cf; 94 void *aux; 95 { 96 struct mcbus_dev_attach_args *tap = aux; 97 if (tap->ma_name != mcbus_cd.cd_name) 98 return (0); 99 if (cf->cf_loc[MCBUSCF_MID] != MCBUSCF_MID_DEFAULT && 100 cf->cf_loc[MCBUSCF_MID] != tap->ma_mid) 101 return (0); 102 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 103 } 104 105 static int 106 mcbusmatch(parent, cf, aux) 107 struct device *parent; 108 struct cfdata *cf; 109 void *aux; 110 { 111 struct mainbus_attach_args *ma = aux; 112 113 /* Make sure we're looking for a MCBUS. */ 114 if (strcmp(ma->ma_name, mcbus_cd.cd_name) != 0) 115 return (0); 116 117 /* 118 * Only available on 4100 processor type platforms. 119 */ 120 if (cputype != ST_DEC_4100) 121 return (0); 122 return (1); 123 } 124 125 static void 126 mcbusattach(parent, self, aux) 127 struct device *parent; 128 struct device *self; 129 void *aux; 130 { 131 static const char *bcs[8] = { 132 "(no bcache)", "1MB BCache", "2MB BCache", "4MB BCache", 133 "??(4)??", "??(5)??", "??(6)??", "??(7)??" 134 }; 135 static const u_int8_t pci_mid_order[4] = { 5, 4, 7, 6 }; 136 struct mcbus_dev_attach_args ta; 137 mcbus_softc_t *mbp = (mcbus_softc_t *)self; 138 u_int8_t mid; 139 int i; 140 141 printf("\n"); 142 143 mbp->mcbus_types[0] = MCBUS_TYPE_RES; 144 for (mid = 1; mid <= MCBUS_MID_MAX; ++mid) { 145 mbp->mcbus_types[mid] = MCBUS_TYPE_UNK; 146 } 147 148 /* 149 * Find and "configure" memory. 150 */ 151 ta.ma_name = mcbus_cd.cd_name; 152 ta.ma_gid = MCBUS_GID_FROM_INSTANCE(self->dv_unit); 153 ta.ma_mid = 1; 154 ta.ma_type = MCBUS_TYPE_MEM; 155 mbp->mcbus_types[1] = MCBUS_TYPE_MEM; 156 config_found_sm(self, &ta, mcbusprint, mcbussubmatch); 157 158 /* 159 * Now find PCI busses. In keeping with Digital's ordering 160 * of things, we'll search in a specific MID order. 161 */ 162 for (i = 0; i < MCPCIA_PER_MCBUS; i++) { 163 mid = pci_mid_order[i]; 164 ta.ma_name = mcbus_cd.cd_name; 165 ta.ma_gid = MCBUS_GID_FROM_INSTANCE(self->dv_unit); 166 ta.ma_mid = mid; 167 ta.ma_type = MCBUS_TYPE_PCI; 168 /* 169 * Attach any children nodes (PCI busses). 170 */ 171 config_found_sm(self, &ta, mcbusprint, mcbussubmatch); 172 } 173 174 /* 175 * Deal with hooking CPU instances to MCBUS module ids. 176 * 177 * Note that we do this here because it's the read of 178 * stupid MCPCIA WHOAMI register that can get us the 179 * module ID and type of the configuring CPU. 180 */ 181 182 if (mcbus_primary.mcbus_valid) { 183 mid = mcbus_primary.mcbus_cpu_mid; 184 printf("%s mid %d: %s %s\n", self->dv_xname, 185 mid, mcbus_node_type_str(MCBUS_TYPE_CPU), 186 bcs[mcbus_primary.mcbus_bcache & 0x7]); 187 #if 0 188 ta.ma_name = mcbus_cd.cd_name; 189 ta.ma_gid = MCBUS_GID_FROM_INSTANCE(self->dv_unit); 190 ta.ma_mid = mid; 191 ta.ma_type = MCBUS_TYPE_CPU; 192 mbp->mcbus_types[mid] = MCBUS_TYPE_CPU; 193 config_found_sm(self, &ta, mcbusprint, mcbussubmatch); 194 #endif 195 } 196 197 /* 198 * Now clean up after configuring everything. 199 * 200 * This is an unfortunate layering violation- but 201 * we can't enable interrupts until *all* probing 202 * is done, but the code and knowledge to clean 203 * up after probing and to enable interrupts is 204 * down in the MCPCIA layer. 205 */ 206 mcpcia_config_cleanup(); 207 } 208 209 static char * 210 mcbus_node_type_str(type) 211 u_int8_t type; 212 { 213 switch (type) { 214 case MCBUS_TYPE_RES: 215 panic ("RESERVED TYPE IN MCBUS_NODE_TYPE_STR"); 216 break; 217 case MCBUS_TYPE_UNK: 218 panic ("UNKNOWN TYPE IN MCBUS_NODE_TYPE_STR"); 219 break; 220 case MCBUS_TYPE_MEM: 221 return ("Memory"); 222 case MCBUS_TYPE_CPU: 223 return ("CPU"); 224 case MCBUS_TYPE_PCI: 225 return ("PCI Bridge"); 226 default: 227 panic("REALLY UNKNWON (%x) TYPE IN MCBUS_NODE_TYPE_STR", type); 228 break; 229 } 230 } 231
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