mcbus.c revision 1.4
1 /* $NetBSD: mcbus.c,v 1.4 1998/07/08 00:56:39 mjacob 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 1.4 1998/07/08 00:56:39 mjacob 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 extern int cputype; 60 61 struct mcbus_cpu_busdep mcbus_primary; 62 63 static int mcbusmatch __P((struct device *, struct cfdata *, void *)); 64 static void mcbusattach __P((struct device *, struct device *, void *)); 65 static int mcbusprint __P((void *, const char *)); 66 static int mcbussubmatch __P((struct device *, struct cfdata *, void *)); 67 static char *mcbus_node_type_str __P((u_int8_t)); 68 69 typedef struct { 70 struct device mcbus_dev; 71 u_int8_t mcbus_types[MCBUS_MID_MAX]; 72 } mcbus_softc_t; 73 74 struct cfattach mcbus_ca = { 75 sizeof (mcbus_softc_t), mcbusmatch, mcbusattach 76 }; 77 78 extern void mcpcia_config_cleanup __P((void)); 79 80 81 static int 82 mcbusprint(aux, cp) 83 void *aux; 84 const char *cp; 85 { 86 struct mcbus_dev_attach_args *tap = aux; 87 printf(" mid %d: %s", tap->ma_mid, mcbus_node_type_str(tap->ma_type)); 88 return (UNCONF); 89 } 90 91 static int 92 mcbussubmatch(parent, cf, aux) 93 struct device *parent; 94 struct cfdata *cf; 95 void *aux; 96 { 97 struct mcbus_dev_attach_args *tap = aux; 98 if (tap->ma_name != mcbus_cd.cd_name) 99 return (0); 100 if (cf->cf_loc[MCBUSCF_MID] != MCBUSCF_MID_DEFAULT && 101 cf->cf_loc[MCBUSCF_MID] != tap->ma_mid) 102 return (0); 103 return ((*cf->cf_attach->ca_match)(parent, cf, aux)); 104 } 105 106 static int 107 mcbusmatch(parent, cf, aux) 108 struct device *parent; 109 struct cfdata *cf; 110 void *aux; 111 { 112 struct mainbus_attach_args *ma = aux; 113 114 /* Make sure we're looking for a MCBUS. */ 115 if (strcmp(ma->ma_name, mcbus_cd.cd_name) != 0) 116 return (0); 117 118 /* 119 * Only available on 4100 processor type platforms. 120 */ 121 if (cputype != ST_DEC_4100) 122 return (0); 123 return (1); 124 } 125 126 static void 127 mcbusattach(parent, self, aux) 128 struct device *parent; 129 struct device *self; 130 void *aux; 131 { 132 static const char *bcs[8] = { 133 "(no bcache)", "1MB BCache", "2MB BCache", "4MB BCache", 134 "??(4)??", "??(5)??", "??(6)??", "??(7)??" 135 }; 136 static const u_int8_t pci_mid_order[4] = { 5, 4, 7, 6 }; 137 struct mcbus_dev_attach_args ta; 138 mcbus_softc_t *mbp = (mcbus_softc_t *)self; 139 u_int8_t mid; 140 int i; 141 142 printf("\n"); 143 144 mbp->mcbus_types[0] = MCBUS_TYPE_RES; 145 for (mid = 1; mid <= MCBUS_MID_MAX; ++mid) { 146 mbp->mcbus_types[mid] = MCBUS_TYPE_UNK; 147 } 148 149 /* 150 * Find and "configure" memory. 151 */ 152 ta.ma_name = mcbus_cd.cd_name; 153 ta.ma_gid = MCBUS_GID_FROM_INSTANCE(self->dv_unit); 154 ta.ma_mid = 1; 155 ta.ma_type = MCBUS_TYPE_MEM; 156 mbp->mcbus_types[1] = MCBUS_TYPE_MEM; 157 config_found_sm(self, &ta, mcbusprint, mcbussubmatch); 158 159 /* 160 * Now find PCI busses. In keeping with Digital's ordering 161 * of things, we'll search in a specific MID order. 162 */ 163 for (i = 0; i < MCPCIA_PER_MCBUS; i++) { 164 mid = pci_mid_order[i]; 165 ta.ma_name = mcbus_cd.cd_name; 166 ta.ma_gid = MCBUS_GID_FROM_INSTANCE(self->dv_unit); 167 ta.ma_mid = mid; 168 ta.ma_type = MCBUS_TYPE_PCI; 169 /* 170 * Attach any children nodes (PCI busses). 171 */ 172 config_found_sm(self, &ta, mcbusprint, mcbussubmatch); 173 } 174 175 /* 176 * Deal with hooking CPU instances to MCBUS module ids. 177 * 178 * Note that we do this here because it's the read of 179 * stupid MCPCIA WHOAMI register that can get us the 180 * module ID and type of the configuring CPU. 181 */ 182 183 if (mcbus_primary.mcbus_valid) { 184 mid = mcbus_primary.mcbus_cpu_mid; 185 printf("%s mid %d: %s %s\n", self->dv_xname, 186 mid, mcbus_node_type_str(MCBUS_TYPE_CPU), 187 bcs[mcbus_primary.mcbus_bcache & 0x7]); 188 #if 0 189 ta.ma_name = mcbus_cd.cd_name; 190 ta.ma_gid = MCBUS_GID_FROM_INSTANCE(self->dv_unit); 191 ta.ma_mid = mid; 192 ta.ma_type = MCBUS_TYPE_CPU; 193 mbp->mcbus_types[mid] = MCBUS_TYPE_CPU; 194 config_found_sm(self, &ta, mcbusprint, mcbussubmatch); 195 #endif 196 } 197 198 /* 199 * Now clean up after configuring everything. 200 * 201 * This is an unfortunate layering violation- but 202 * we can't enable interrupts until *all* probing 203 * is done, but the code and knowledge to clean 204 * up after probing and to enable interrupts is 205 * down in the MCPCIA layer. 206 */ 207 mcpcia_config_cleanup(); 208 } 209 210 static char * 211 mcbus_node_type_str(type) 212 u_int8_t type; 213 { 214 switch (type) { 215 case MCBUS_TYPE_RES: 216 panic ("RESERVED TYPE IN MCBUS_NODE_TYPE_STR"); 217 break; 218 case MCBUS_TYPE_UNK: 219 panic ("UNKNOWN TYPE IN MCBUS_NODE_TYPE_STR"); 220 break; 221 case MCBUS_TYPE_MEM: 222 return ("Memory"); 223 case MCBUS_TYPE_CPU: 224 return ("CPU"); 225 case MCBUS_TYPE_PCI: 226 return ("PCI Bridge"); 227 default: 228 panic("REALLY UNKNWON (%x) TYPE IN MCBUS_NODE_TYPE_STR", type); 229 break; 230 } 231 } 232
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