1 /* $NetBSD: tlsb.c,v 1.32 2007/03/04 05:59:12 christos Exp $ */ 2 /* 3 * Copyright (c) 1997 by Matthew Jacob 4 * NASA AMES Research Center. 5 * All rights reserved. 6 * 7 * Based in part upon a prototype version by Jason Thorpe 8 * Copyright (c) 1996, 1998 by Jason Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice immediately at the beginning of the file, without modification, 15 * this list of conditions, and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 26 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Autoconfiguration and support routines for the TurboLaser System Bus 37 * found on AlphaServer 8200 and 8400 systems. 38 */ 39 40 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 41 42 __KERNEL_RCSID(0, "$NetBSD: tlsb.c,v 1.32 2007/03/04 05:59:12 christos Exp $"); 43 44 #include "opt_multiprocessor.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/device.h> 49 #include <sys/malloc.h> 50 51 #include <machine/autoconf.h> 52 #include <machine/cpu.h> 53 #include <machine/cpuvar.h> 54 #include <machine/rpb.h> 55 #include <machine/pte.h> 56 #include <machine/alpha.h> 57 58 #include <alpha/tlsb/tlsbreg.h> 59 #include <alpha/tlsb/tlsbvar.h> 60 61 #include "locators.h" 62 63 #define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr))) 64 65 static int tlsbmatch __P((struct device *, struct cfdata *, void *)); 66 static void tlsbattach __P((struct device *, struct device *, void *)); 67 68 CFATTACH_DECL(tlsb, sizeof (struct device), 69 tlsbmatch, tlsbattach, NULL, NULL); 70 71 extern struct cfdriver tlsb_cd; 72 73 static int tlsbprint __P((void *, const char *)); 74 static const char *tlsb_node_type_str __P((u_int32_t)); 75 76 /* 77 * There can be only one TurboLaser, and we'll overload it 78 * with a bitmap of found turbo laser nodes. Note that 79 * these are just the actual hard TL node IDS that we 80 * discover here, not the virtual IDs that get assigned 81 * to CPUs. During TLSB specific error handling we 82 * only need to know which actual TLSB slots have boards 83 * in them (irrespective of how many CPUs they have). 84 */ 85 int tlsb_found; 86 87 static int 88 tlsbprint(aux, pnp) 89 void *aux; 90 const char *pnp; 91 { 92 struct tlsb_dev_attach_args *tap = aux; 93 94 if (pnp) 95 aprint_normal("%s at %s node %d", 96 tlsb_node_type_str(tap->ta_dtype), pnp, tap->ta_node); 97 else 98 aprint_normal(" node %d: %s", tap->ta_node, 99 tlsb_node_type_str(tap->ta_dtype)); 100 101 return (UNCONF); 102 } 103 104 static int 105 tlsbmatch(parent, cf, aux) 106 struct device *parent; 107 struct cfdata *cf; 108 void *aux; 109 { 110 struct mainbus_attach_args *ma = aux; 111 112 /* Make sure we're looking for a TurboLaser. */ 113 if (strcmp(ma->ma_name, tlsb_cd.cd_name) != 0) 114 return (0); 115 116 /* 117 * Only one instance of TurboLaser allowed, 118 * and only available on 21000 processor type 119 * platforms. 120 */ 121 if ((cputype != ST_DEC_21000) || tlsb_found) 122 return (0); 123 124 return (1); 125 } 126 127 static void 128 tlsbattach(parent, self, aux) 129 struct device *parent; 130 struct device *self; 131 void *aux; 132 { 133 struct tlsb_dev_attach_args ta; 134 u_int32_t tldev; 135 int node; 136 int locs[TLSBCF_NLOCS]; 137 138 printf("\n"); 139 140 /* 141 * Attempt to find all devices on the bus, including 142 * CPUs, memory modules, and I/O modules. 143 */ 144 145 /* 146 * Sigh. I would like to just start off nicely, 147 * but I need to treat I/O modules differently- 148 * The highest priority I/O node has to be in 149 * node #8, and I want to find it *first*, since 150 * it will have the primary disks (most likely) 151 * on it. 152 */ 153 for (node = 0; node <= TLSB_NODE_MAX; ++node) { 154 /* 155 * Check for invalid address. This may not really 156 * be necessary, but what the heck... 157 */ 158 if (badaddr(TLSB_NODE_REG_ADDR(node, TLDEV), sizeof(u_int32_t))) 159 continue; 160 tldev = TLSB_GET_NODEREG(node, TLDEV); 161 if (tldev == 0) { 162 /* Nothing at this node. */ 163 continue; 164 } 165 /* 166 * Store up that we found something at this node. 167 * We do this so that we don't have to do something 168 * silly at fault time like try a 'baddadr'... 169 */ 170 tlsb_found |= (1 << node); 171 if (TLDEV_ISIOPORT(tldev)) 172 continue; /* not interested right now */ 173 ta.ta_node = node; 174 ta.ta_dtype = TLDEV_DTYPE(tldev); 175 ta.ta_swrev = TLDEV_SWREV(tldev); 176 ta.ta_hwrev = TLDEV_HWREV(tldev); 177 178 /* 179 * Deal with hooking CPU instances to TurboLaser nodes. 180 */ 181 if (TLDEV_ISCPU(tldev)) { 182 printf("%s node %d: %s\n", self->dv_xname, 183 node, tlsb_node_type_str(tldev)); 184 } 185 /* 186 * Attach any children nodes, including a CPU's GBus 187 */ 188 locs[TLSBCF_NODE] = node; 189 locs[TLSBCF_OFFSET] = 0; /* XXX unused? */ 190 191 config_found_sm_loc(self, "tlsb", locs, &ta, 192 tlsbprint, config_stdsubmatch); 193 } 194 /* 195 * *Now* search for I/O nodes (in descending order) 196 */ 197 while (--node > 0) { 198 if (badaddr(TLSB_NODE_REG_ADDR(node, TLDEV), sizeof(u_int32_t))) 199 continue; 200 tldev = TLSB_GET_NODEREG(node, TLDEV); 201 if (tldev == 0) { 202 continue; 203 } 204 if (TLDEV_ISIOPORT(tldev)) { 205 #if defined(MULTIPROCESSOR) 206 /* 207 * XXX Eventually, we want to select a secondary 208 * XXX processor on which to field interrupts for 209 * XXX this node. However, we just send them to 210 * XXX the primary CPU for now. 211 * 212 * XXX Maybe multiple CPUs? Does the hardware 213 * XXX round-robin, or check the length of the 214 * XXX per-CPU interrupt queue? 215 */ 216 printf("%s node %d: routing interrupts to %s\n", 217 self->dv_xname, node, 218 cpu_info[hwrpb->rpb_primary_cpu_id]->ci_softc->sc_dev.dv_xname); 219 TLSB_PUT_NODEREG(node, TLCPUMASK, 220 (1UL << hwrpb->rpb_primary_cpu_id)); 221 #else 222 /* 223 * Make sure interrupts are sent to the primary CPU. 224 */ 225 TLSB_PUT_NODEREG(node, TLCPUMASK, 226 (1UL << hwrpb->rpb_primary_cpu_id)); 227 #endif /* MULTIPROCESSOR */ 228 229 ta.ta_node = node; 230 ta.ta_dtype = TLDEV_DTYPE(tldev); 231 ta.ta_swrev = TLDEV_SWREV(tldev); 232 ta.ta_hwrev = TLDEV_HWREV(tldev); 233 234 locs[TLSBCF_NODE] = node; 235 locs[TLSBCF_OFFSET] = 0; /* XXX unused? */ 236 237 config_found_sm_loc(self, "tlsb", locs, &ta, 238 tlsbprint, config_stdsubmatch); 239 } 240 } 241 } 242 243 static const char * 244 tlsb_node_type_str(dtype) 245 u_int32_t dtype; 246 { 247 static char tlsb_line[64]; 248 249 switch (dtype & TLDEV_DTYPE_MASK) { 250 case TLDEV_DTYPE_KFTHA: 251 return ("KFTHA I/O interface"); 252 253 case TLDEV_DTYPE_KFTIA: 254 return ("KFTIA I/O interface"); 255 256 case TLDEV_DTYPE_MS7CC: 257 return ("MS7CC Memory Module"); 258 259 case TLDEV_DTYPE_SCPU4: 260 return ("Single CPU, 4MB cache"); 261 262 case TLDEV_DTYPE_SCPU16: 263 return ("Single CPU, 16MB cache"); 264 265 case TLDEV_DTYPE_DCPU4: 266 return ("Dual CPU, 4MB cache"); 267 268 case TLDEV_DTYPE_DCPU16: 269 return ("Dual CPU, 16MB cache"); 270 271 default: 272 memset(tlsb_line, 0, sizeof(tlsb_line)); 273 sprintf(tlsb_line, "unknown, dtype 0x%x", dtype); 274 return (tlsb_line); 275 } 276 /* NOTREACHED */ 277 } 278