1 /* $OpenBSD: mcbus.c,v 1.1 2007/03/16 21:22:27 robert Exp $ */ 2 /* $NetBSD: mcbus.c,v 1.19 2007/03/04 05:59:11 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1998 by Matthew Jacob 6 * NASA AMES Research Center. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice immediately at the beginning of the file, without modification, 14 * 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. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Autoconfiguration routines for the MCBUS system 36 * bus found on AlphaServer 4100 systems. 37 */ 38 39 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 #include <sys/malloc.h> 44 45 #include <machine/autoconf.h> 46 #include <machine/rpb.h> 47 #include <machine/pte.h> 48 49 #include <alpha/mcbus/mcbusreg.h> 50 #include <alpha/mcbus/mcbusvar.h> 51 52 #include <alpha/pci/mcpciareg.h> 53 54 #define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr))) 55 #define MCPCIA_EXISTS(mid, gid) \ 56 (!badaddr((void *)KV(MCPCIA_BRIDGE_ADDR(gid, mid)), sizeof (u_int32_t))) 57 58 struct mcbus_cpu_busdep mcbus_primary; 59 60 int mcbusmatch (struct device *, void *, void *); 61 void mcbusattach (struct device *, struct device *, void *); 62 int mcbusprint (void *, const char *); 63 int mcbussbm (struct device *, void *, void *); 64 65 const char *mcbus_node_type_str (u_int8_t); 66 67 typedef struct { 68 struct device mcbus_dev; 69 u_int8_t mcbus_types[MCBUS_MID_MAX]; 70 } mcbus_softc_t; 71 72 struct cfattach mcbus_ca = { 73 sizeof(mcbus_softc_t), mcbusmatch, mcbusattach 74 }; 75 76 struct cfdriver mcbus_cd = { 77 NULL, "mcbus", DV_DULL, 78 }; 79 80 /* 81 * Tru64 UNIX (formerly Digital UNIX (formerly DEC OSF/1)) probes for MCPCIAs 82 * in the following order: 83 * 84 * 5, 4, 7, 6 85 * 86 * This is so that the built-in CD-ROM on the internal 53c810 is always 87 * dka500. We probe them in the same order, for consistency. 88 */ 89 const int mcbus_mcpcia_probe_order[] = { 5, 4, 7, 6 }; 90 91 extern void mcpcia_config_cleanup (void); 92 93 int 94 mcbusprint(aux, cp) 95 void *aux; 96 const char *cp; 97 { 98 struct mcbus_dev_attach_args *tap = aux; 99 printf(" mid %d: %s", tap->ma_mid, 100 mcbus_node_type_str(tap->ma_type)); 101 return (UNCONF); 102 } 103 104 int 105 mcbussbm(parent, cf, aux) 106 struct device *parent; 107 void *cf; 108 void *aux; 109 { 110 struct mcbus_dev_attach_args *tap = aux; 111 struct cfdata *mcf = (struct cfdata *)cf; 112 113 if (mcf->cf_loc[MCBUSCF_MID] != MCBUSCF_MID_DEFAULT && 114 mcf->cf_loc[MCBUSCF_MID] != tap->ma_mid) 115 return (0); 116 117 118 return ((*mcf->cf_attach->ca_match)(parent, mcf, aux)); 119 } 120 121 int 122 mcbusmatch(parent, cf, aux) 123 struct device *parent; 124 void *cf; 125 void *aux; 126 { 127 struct mainbus_attach_args *ma = aux; 128 129 /* Make sure we're looking for a MCBUS. */ 130 if (strcmp(ma->ma_name, mcbus_cd.cd_name) != 0) 131 return (0); 132 133 /* 134 * Only available on 4100 processor type platforms. 135 */ 136 if (cputype != ST_DEC_4100) 137 return (0); 138 139 return (1); 140 } 141 142 void 143 mcbusattach(parent, self, aux) 144 struct device *parent; 145 struct device *self; 146 void *aux; 147 { 148 static const char *bcs[CPU_BCacheMask + 1] = { 149 "No", "1MB", "2MB", "4MB", 150 }; 151 struct mcbus_dev_attach_args ta; 152 mcbus_softc_t *mbp = (mcbus_softc_t *)self; 153 int i, mid; 154 155 printf(": %s BCache\n", mcbus_primary.mcbus_valid ? 156 bcs[mcbus_primary.mcbus_bcache] : "Unknown"); 157 158 mbp->mcbus_types[0] = MCBUS_TYPE_RES; 159 for (mid = 1; mid <= MCBUS_MID_MAX; ++mid) 160 mbp->mcbus_types[mid] = MCBUS_TYPE_UNK; 161 162 /* 163 * Find and "configure" memory. 164 */ 165 ta.ma_name = mcbus_cd.cd_name; 166 ta.ma_gid = MCBUS_GID_FROM_INSTANCE(0); 167 ta.ma_mid = 1; 168 ta.ma_type = MCBUS_TYPE_MEM; 169 mbp->mcbus_types[1] = MCBUS_TYPE_MEM; 170 171 (void) config_found_sm(self, &ta, mcbusprint, mcbussbm); 172 173 /* 174 * Now find PCI busses. 175 */ 176 for (i = 0; i < MCPCIA_PER_MCBUS; i++) { 177 mid = mcbus_mcpcia_probe_order[i]; 178 ta.ma_name = mcbus_cd.cd_name; 179 ta.ma_gid = MCBUS_GID_FROM_INSTANCE(0); 180 ta.ma_mid = mid; 181 ta.ma_type = MCBUS_TYPE_PCI; 182 if (MCPCIA_EXISTS(ta.ma_mid, ta.ma_gid)) 183 (void) config_found_sm(self, &ta, mcbusprint, 184 mcbussbm); 185 } 186 187 mcpcia_config_cleanup(); 188 } 189 190 const char * 191 mcbus_node_type_str(type) 192 u_int8_t type; 193 { 194 switch (type) { 195 case MCBUS_TYPE_RES: 196 panic ("RESERVED TYPE IN MCBUS_NODE_TYPE_STR"); 197 break; 198 case MCBUS_TYPE_UNK: 199 panic ("UNKNOWN TYPE IN MCBUS_NODE_TYPE_STR"); 200 break; 201 case MCBUS_TYPE_MEM: 202 return ("Memory"); 203 case MCBUS_TYPE_CPU: 204 return ("CPU"); 205 case MCBUS_TYPE_PCI: 206 return ("PCI Bridge"); 207 default: 208 panic("REALLY UNKNWON (%x) TYPE IN MCBUS_NODE_TYPE_STR", type); 209 break; 210 } 211 } 212