1 /* $NetBSD: tlsb.c,v 1.41 2021/08/07 16:18:41 thorpej 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 1.41 2021/08/07 16:18:41 thorpej Exp $"); 43 44 #include "opt_multiprocessor.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/device.h> 49 50 #include <machine/autoconf.h> 51 #include <machine/cpu.h> 52 #include <machine/cpuvar.h> 53 #include <machine/rpb.h> 54 #include <machine/pte.h> 55 #include <machine/alpha.h> 56 57 #include <alpha/tlsb/tlsbreg.h> 58 #include <alpha/tlsb/tlsbvar.h> 59 60 #include "locators.h" 61 62 #define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr))) 63 64 static int tlsbmatch(device_t, cfdata_t, void *); 65 static void tlsbattach(device_t, device_t, void *); 66 67 CFATTACH_DECL_NEW(tlsb, 0, 68 tlsbmatch, tlsbattach, NULL, NULL); 69 70 extern struct cfdriver tlsb_cd; 71 72 static int tlsbprint(void *, const char *); 73 static const char *tlsb_node_type_str(uint32_t); 74 75 /* 76 * There can be only one TurboLaser, and we'll overload it 77 * with a bitmap of found turbo laser nodes. Note that 78 * these are just the actual hard TL node IDS that we 79 * discover here, not the virtual IDs that get assigned 80 * to CPUs. During TLSB specific error handling we 81 * only need to know which actual TLSB slots have boards 82 * in them (irrespective of how many CPUs they have). 83 */ 84 int tlsb_found; 85 86 static int 87 tlsbprint(void *aux, const char *pnp) 88 { 89 struct tlsb_dev_attach_args *tap = aux; 90 91 if (pnp) 92 aprint_normal("%s at %s node %d", 93 tlsb_node_type_str(tap->ta_dtype), pnp, tap->ta_node); 94 else 95 aprint_normal(" node %d: %s", tap->ta_node, 96 tlsb_node_type_str(tap->ta_dtype)); 97 98 return (UNCONF); 99 } 100 101 static int 102 tlsbmatch(device_t parent, cfdata_t cf, void *aux) 103 { 104 struct mainbus_attach_args *ma = aux; 105 106 /* Make sure we're looking for a TurboLaser. */ 107 if (strcmp(ma->ma_name, tlsb_cd.cd_name) != 0) 108 return (0); 109 110 /* 111 * Only one instance of TurboLaser allowed, 112 * and only available on 21000 processor type 113 * platforms. 114 */ 115 if ((cputype != ST_DEC_21000) || tlsb_found) 116 return (0); 117 118 return (1); 119 } 120 121 static void 122 tlsbattach(device_t parent, device_t self, void *aux) 123 { 124 struct tlsb_dev_attach_args ta; 125 uint32_t tldev; 126 int node; 127 int locs[TLSBCF_NLOCS]; 128 129 printf("\n"); 130 131 /* 132 * Attempt to find all devices on the bus, including 133 * CPUs, memory modules, and I/O modules. 134 */ 135 136 /* 137 * Sigh. I would like to just start off nicely, 138 * but I need to treat I/O modules differently- 139 * The highest priority I/O node has to be in 140 * node #8, and I want to find it *first*, since 141 * it will have the primary disks (most likely) 142 * on it. 143 */ 144 for (node = 0; node <= TLSB_NODE_MAX; ++node) { 145 /* 146 * Check for invalid address. This may not really 147 * be necessary, but what the heck... 148 */ 149 if (badaddr(TLSB_NODE_REG_ADDR(node, TLDEV), sizeof(uint32_t))) 150 continue; 151 tldev = TLSB_GET_NODEREG(node, TLDEV); 152 if (tldev == 0) { 153 /* Nothing at this node. */ 154 continue; 155 } 156 /* 157 * Store up that we found something at this node. 158 * We do this so that we don't have to do something 159 * silly at fault time like try a 'baddadr'... 160 */ 161 tlsb_found |= (1 << node); 162 if (TLDEV_ISIOPORT(tldev)) 163 continue; /* not interested right now */ 164 ta.ta_node = node; 165 ta.ta_dtype = TLDEV_DTYPE(tldev); 166 ta.ta_swrev = TLDEV_SWREV(tldev); 167 ta.ta_hwrev = TLDEV_HWREV(tldev); 168 169 /* 170 * Deal with hooking CPU instances to TurboLaser nodes. 171 */ 172 if (TLDEV_ISCPU(tldev)) { 173 aprint_normal("%s node %d: %s\n", device_xname(self), 174 node, tlsb_node_type_str(tldev)); 175 } 176 /* 177 * Attach any children nodes, including a CPU's GBus 178 */ 179 locs[TLSBCF_NODE] = node; 180 locs[TLSBCF_OFFSET] = 0; /* XXX unused? */ 181 182 config_found(self, &ta, tlsbprint, 183 CFARGS(.submatch = config_stdsubmatch, 184 .locators = locs)); 185 } 186 /* 187 * *Now* search for I/O nodes (in descending order) 188 */ 189 while (--node > 0) { 190 if (badaddr(TLSB_NODE_REG_ADDR(node, TLDEV), sizeof(uint32_t))) 191 continue; 192 tldev = TLSB_GET_NODEREG(node, TLDEV); 193 if (tldev == 0) { 194 continue; 195 } 196 if (TLDEV_ISIOPORT(tldev)) { 197 #if defined(MULTIPROCESSOR) 198 /* 199 * XXX Eventually, we want to select a secondary 200 * XXX processor on which to field interrupts for 201 * XXX this node. However, we just send them to 202 * XXX the primary CPU for now. 203 * 204 * XXX Maybe multiple CPUs? Does the hardware 205 * XXX round-robin, or check the length of the 206 * XXX per-CPU interrupt queue? 207 */ 208 printf("%s node %d: routing interrupts to %s\n", 209 device_xname(self), node, 210 device_xname(cpu_info[hwrpb->rpb_primary_cpu_id]->ci_softc->sc_dev)); 211 TLSB_PUT_NODEREG(node, TLCPUMASK, 212 (1UL << hwrpb->rpb_primary_cpu_id)); 213 #else 214 /* 215 * Make sure interrupts are sent to the primary CPU. 216 */ 217 TLSB_PUT_NODEREG(node, TLCPUMASK, 218 (1UL << hwrpb->rpb_primary_cpu_id)); 219 #endif /* MULTIPROCESSOR */ 220 221 ta.ta_node = node; 222 ta.ta_dtype = TLDEV_DTYPE(tldev); 223 ta.ta_swrev = TLDEV_SWREV(tldev); 224 ta.ta_hwrev = TLDEV_HWREV(tldev); 225 226 locs[TLSBCF_NODE] = node; 227 locs[TLSBCF_OFFSET] = 0; /* XXX unused? */ 228 229 config_found(self, &ta, tlsbprint, 230 CFARGS(.submatch = config_stdsubmatch, 231 .locators = locs)); 232 } 233 } 234 } 235 236 static const char * 237 tlsb_node_type_str(uint32_t dtype) 238 { 239 static char tlsb_line[64]; 240 241 switch (dtype & TLDEV_DTYPE_MASK) { 242 case TLDEV_DTYPE_KFTHA: 243 return ("KFTHA I/O interface"); 244 245 case TLDEV_DTYPE_KFTIA: 246 return ("KFTIA I/O interface"); 247 248 case TLDEV_DTYPE_MS7CC: 249 return ("MS7CC Memory Module"); 250 251 case TLDEV_DTYPE_SCPU4: 252 return ("Single CPU, 4MB cache"); 253 254 case TLDEV_DTYPE_SCPU16: 255 return ("Single CPU, 16MB cache"); 256 257 case TLDEV_DTYPE_DCPU4: 258 return ("Dual CPU, 4MB cache"); 259 260 case TLDEV_DTYPE_DCPU16: 261 return ("Dual CPU, 16MB cache"); 262 263 default: 264 snprintf(tlsb_line, sizeof(tlsb_line), "unknown, dtype 0x%x", 265 dtype); 266 return (tlsb_line); 267 } 268 /* NOTREACHED */ 269 } 270