ofw_autoconf.c revision 1.6
1 /* $NetBSD: ofw_autoconf.c,v 1.6 2008/01/09 17:45:46 aymeric Exp $ */ 2 /* 3 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 4 * Copyright (C) 1995, 1996 TooLs GmbH. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by TooLs GmbH. 18 * 4. The name of TooLs GmbH 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 TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 27 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 29 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 30 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: ofw_autoconf.c,v 1.6 2008/01/09 17:45:46 aymeric Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/conf.h> 38 #include <sys/device.h> 39 #include <sys/reboot.h> 40 #include <sys/systm.h> 41 42 #include <uvm/uvm_extern.h> 43 44 #include <machine/autoconf.h> 45 #include <machine/bus.h> 46 #include <machine/stdarg.h> 47 48 #include <dev/ofw/openfirm.h> 49 #include <dev/pci/pcireg.h> 50 #include <dev/pci/pcivar.h> 51 #include <dev/scsipi/scsi_all.h> 52 #include <dev/scsipi/scsipi_all.h> 53 #include <dev/scsipi/scsiconf.h> 54 #include <dev/ata/atavar.h> 55 #include <dev/ic/wdcvar.h> 56 57 extern char bootpath[256]; 58 char cbootpath[256]; 59 int console_node = 0, console_instance = 0; 60 61 static void canonicalize_bootpath(void); 62 63 /* 64 * Determine device configuration for a machine. 65 */ 66 void 67 cpu_configure(void) 68 { 69 init_interrupt(); 70 canonicalize_bootpath(); 71 72 if (config_rootfound("mainbus", NULL) == NULL) 73 panic("configure: mainbus not configured"); 74 75 genppc_cpu_configure(); 76 } 77 78 static void 79 canonicalize_bootpath(void) 80 { 81 int node; 82 char *p, *lastp; 83 char last[32]; 84 85 /* 86 * If the bootpath doesn't start with a / then it isn't 87 * an OFW path and probably is an alias, so look up the alias 88 * and regenerate the full bootpath so device_register will work. 89 */ 90 if (bootpath[0] != '/' && bootpath[0] != '\0') { 91 int aliases = OF_finddevice("/aliases"); 92 char tmpbuf[100]; 93 char aliasbuf[256]; 94 if (aliases != 0) { 95 char *cp1, *cp2, *cp; 96 char saved_ch = '\0'; 97 int len; 98 cp1 = strchr(bootpath, ':'); 99 cp2 = strchr(bootpath, ','); 100 cp = cp1; 101 if (cp1 == NULL || (cp2 != NULL && cp2 < cp1)) 102 cp = cp2; 103 tmpbuf[0] = '\0'; 104 if (cp != NULL) { 105 strcpy(tmpbuf, cp); 106 saved_ch = *cp; 107 *cp = '\0'; 108 } 109 len = OF_getprop(aliases, bootpath, aliasbuf, 110 sizeof(aliasbuf)); 111 if (len > 0) { 112 if (aliasbuf[len-1] == '\0') 113 len--; 114 memcpy(bootpath, aliasbuf, len); 115 strcpy(&bootpath[len], tmpbuf); 116 } else { 117 *cp = saved_ch; 118 } 119 } 120 } 121 122 /* 123 * Strip kernel name. bootpath contains "OF-path"/"kernel". 124 * 125 * for example: 126 * /bandit@F2000000/gc@10/53c94@10000/sd@0,0/netbsd (OF-1.x) 127 * /pci/mac-io/ata-3@2000/disk@0:0/netbsd.new (OF-3.x) 128 */ 129 strcpy(cbootpath, bootpath); 130 while ((node = OF_finddevice(cbootpath)) == -1) { 131 if ((p = strrchr(cbootpath, '/')) == NULL) 132 break; 133 *p = '\0'; 134 } 135 136 if (node == -1) { 137 /* Cannot canonicalize... use bootpath anyway. */ 138 strcpy(cbootpath, bootpath); 139 140 return; 141 } 142 143 /* 144 * cbootpath is a valid OF path. Use package-to-path to 145 * canonicalize pathname. 146 */ 147 148 /* Back up the last component for later use. */ 149 if ((p = strrchr(cbootpath, '/')) != NULL) 150 strcpy(last, p + 1); 151 else 152 last[0] = '\0'; 153 154 memset(cbootpath, 0, sizeof(cbootpath)); 155 OF_package_to_path(node, cbootpath, sizeof(cbootpath) - 1); 156 157 /* 158 * OF_1.x (at least) always returns addr == 0 for 159 * SCSI disks (i.e. "/bandit (at) .../.../sd@0,0"). 160 */ 161 lastp = strrchr(cbootpath, '/'); 162 if (lastp != NULL) { 163 lastp++; 164 if (strncmp(lastp, "sd@", 3) == 0 165 && strncmp(last, "sd@", 3) == 0) 166 strcpy(lastp, last); 167 } else { 168 lastp = cbootpath; 169 } 170 171 /* 172 * At this point, cbootpath contains like: 173 * "/pci@80000000/mac-io@10/ata-3@20000/disk" 174 * 175 * The last component may have no address... so append it. 176 */ 177 if (strchr(lastp, '@') == NULL) { 178 /* Append it. */ 179 if ((p = strrchr(last, '@')) != NULL) 180 strcat(cbootpath, p); 181 } 182 183 if ((p = strrchr(lastp, ':')) != NULL) { 184 *p++ = '\0'; 185 /* booted_partition = *p - '0'; XXX correct? */ 186 } 187 188 /* XXX Does this belong here, or device_register()? */ 189 if ((p = strrchr(lastp, ',')) != NULL) 190 *p = '\0'; 191 } 192 193 /* 194 * device_register is called from config_attach as each device is 195 * attached. We use it to find the NetBSD device corresponding to the 196 * known OF boot device. 197 */ 198 void 199 device_register(dev, aux) 200 struct device *dev; 201 void *aux; 202 { 203 static struct device *parent; 204 static char *bp = bootpath + 1, *cp = cbootpath; 205 unsigned long addr; 206 char *p; 207 208 /* Skip over devices not represented in the OF tree. */ 209 if (device_is_a(dev, "mainbus")) { 210 parent = dev; 211 return; 212 } 213 if (device_is_a(dev, "atapibus") || device_is_a(dev, "pci") || 214 device_is_a(dev, "scsibus") || device_is_a(dev, "atabus")) 215 return; 216 217 if (device_is_a(device_parent(dev), "pci")) { 218 struct pci_attach_args *pa = aux; 219 prop_dictionary_t dict; 220 prop_bool_t b; 221 int node; 222 char name[32]; 223 224 dict = device_properties(dev); 225 node = pcidev_to_ofdev(pa->pa_pc, pa->pa_tag); 226 227 /* enable configuration of irq 14/15 for VIA native IDE */ 228 if (device_is_a(dev, "viaide") && 229 strncmp(model_name, "Pegasos", 7) == 0) { 230 b = prop_bool_create(true); 231 KASSERT(b != NULL); 232 (void)prop_dictionary_set(dict, 233 "use-compat-native-irq", b); 234 prop_object_release(b); 235 } 236 237 if (node != 0) { 238 int pci_class = 0; 239 240 prop_dictionary_set_uint32(dict, "device_node", node); 241 242 /* see if this is going to be console */ 243 memset(name, 0, sizeof(name)); 244 OF_getprop(node, "device_type", name, sizeof(name)); 245 246 OF_getprop(node, "class-code", &pci_class, 247 sizeof pci_class); 248 pci_class = (pci_class >> 16) & 0xff; 249 250 if (strcmp(name, "display") == 0 || 251 pci_class == PCI_CLASS_DISPLAY) { 252 /* setup display properties for fb driver */ 253 prop_dictionary_set_bool(dict, "is_console", 0); 254 copy_disp_props(dev, node, dict); 255 } 256 } 257 } 258 259 if (booted_device) 260 return; 261 262 if (device_is_a(device_parent(dev), "atapibus") || 263 device_is_a(device_parent(dev), "atabus") || 264 device_is_a(device_parent(dev), "pci") || 265 device_is_a(device_parent(dev), "scsibus")) { 266 if (device_parent(device_parent(dev)) != parent) 267 return; 268 } else { 269 if (device_parent(dev) != parent) 270 return; 271 } 272 273 /* Get the address part of the current path component. The 274 * last component of the canonical bootpath may have no 275 * address (eg, "disk"), in which case we need to get the 276 * address from the original bootpath instead. 277 */ 278 p = strchr(cp, '@'); 279 if (!p) { 280 if (bp) 281 p = strchr(bp, '@'); 282 if (!p) 283 addr = 0; 284 else { 285 addr = strtoul(p + 1, NULL, 16); 286 p = NULL; 287 } 288 } else 289 addr = strtoul(p + 1, &p, 16); 290 291 if (device_is_a(device_parent(dev), "mainbus")) { 292 struct confargs *ca = aux; 293 294 if (strcmp(ca->ca_name, "ofw") == 0) /* XXX */ 295 return; 296 if (addr != ca->ca_reg[0]) 297 return; 298 } else if (device_is_a(device_parent(dev), "pci")) { 299 struct pci_attach_args *pa = aux; 300 301 if (addr != pa->pa_device) 302 return; 303 } else if (device_is_a(device_parent(dev), "obio")) { 304 struct confargs *ca = aux; 305 306 if (addr != ca->ca_reg[0]) 307 return; 308 } else if (device_is_a(device_parent(dev), "scsibus") || 309 device_is_a(device_parent(dev), "atapibus")) { 310 struct scsipibus_attach_args *sa = aux; 311 312 /* periph_target is target for scsi, drive # for atapi */ 313 if (addr != sa->sa_periph->periph_target) 314 return; 315 } else if (device_is_a(device_parent(device_parent(dev)), "pciide")) { 316 struct ata_device *adev = aux; 317 318 if (addr != adev->adev_drv_data->drive) 319 return; 320 321 /* 322 * OF splits channel and drive into separate path 323 * components, so check the addr part of the next 324 * component. (Ignore bp, because the canonical path 325 * will be complete in the pciide case.) 326 */ 327 p = strchr(p, '@'); 328 if (!p++) 329 return; 330 if (strtoul(p, &p, 16) != adev->adev_drv_data->drive) 331 return; 332 } else if (device_is_a(device_parent(device_parent(dev)), "wdc")) { 333 struct ata_device *adev = aux; 334 335 if (addr != adev->adev_drv_data->drive) 336 return; 337 } else 338 return; 339 340 /* If we reach this point, then dev is a match for the current 341 * path component. 342 */ 343 344 if (p && *p) { 345 parent = dev; 346 cp = p; 347 bp = strchr(bp, '/'); 348 if (bp) 349 bp++; 350 return; 351 } else { 352 booted_device = dev; 353 booted_partition = 0; /* XXX -- should be extracted from bootpath */ 354 return; 355 } 356 } 357 358 /* 359 * Setup root device. 360 * Configure swap area. 361 */ 362 void 363 cpu_rootconf() 364 { 365 printf("boot device: %s\n", 366 booted_device ? booted_device->dv_xname : "<unknown>"); 367 368 setroot(booted_device, booted_partition); 369 } 370 371 /* 372 * Find OF-device corresponding to the PCI device. 373 */ 374 int 375 pcidev_to_ofdev(pci_chipset_tag_t pc, pcitag_t tag) 376 { 377 int bus, dev, func; 378 u_int reg[5]; 379 int p, q; 380 int l, b, d, f; 381 382 pci_decompose_tag(pc, tag, &bus, &dev, &func); 383 384 for (q = OF_peer(0); q; q = p) { 385 l = OF_getprop(q, "assigned-addresses", reg, sizeof(reg)); 386 if (l > 4) { 387 b = (reg[0] >> 16) & 0xff; 388 d = (reg[0] >> 11) & 0x1f; 389 f = (reg[0] >> 8) & 0x07; 390 391 if (b == bus && d == dev && f == func) 392 return q; 393 } 394 if ((p = OF_child(q))) 395 continue; 396 while (q) { 397 if ((p = OF_peer(q))) 398 break; 399 q = OF_parent(q); 400 } 401 } 402 return 0; 403 } 404
Indexes created Mon Sep 29 21:09:56 GMT 2025