autoconf.c revision 1.10
1 /* $NetBSD: autoconf.c,v 1.10 2009/07/29 12:02:07 cegger Exp $ */ 2 /* NetBSD: autoconf.c,v 1.75 2003/12/30 12:33:22 pk Exp */ 3 4 /*- 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, 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. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)autoconf.c 7.1 (Berkeley) 5/9/91 36 */ 37 38 /* 39 * Setup the system to run on the current machine. 40 * 41 * Configure() is called at boot time and initializes the vba 42 * device tables and the memory controller monitoring. Available 43 * devices are determined (from possibilities mentioned in ioconf.c), 44 * and the drivers are initialized. 45 */ 46 47 #include <sys/cdefs.h> 48 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.10 2009/07/29 12:02:07 cegger Exp $"); 49 50 #include "opt_xen.h" 51 #include "opt_compat_oldboot.h" 52 #include "opt_multiprocessor.h" 53 #include "opt_nfs_boot.h" 54 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/buf.h> 58 #include <sys/disklabel.h> 59 #include <sys/disk.h> 60 #include <sys/conf.h> 61 #ifdef COMPAT_OLDBOOT 62 #include <sys/reboot.h> 63 #endif 64 #include <sys/device.h> 65 #include <sys/vnode.h> 66 #include <sys/fcntl.h> 67 #include <sys/dkio.h> 68 #include <sys/proc.h> 69 #include <sys/user.h> 70 #include <sys/kauth.h> 71 72 #ifdef NFS_BOOT_BOOTSTATIC 73 #include <net/if.h> 74 #include <net/if_ether.h> 75 #include <netinet/in.h> 76 #include <nfs/rpcv2.h> 77 #include <nfs/nfsproto.h> 78 #include <nfs/nfs.h> 79 #include <nfs/nfsmount.h> 80 #include <nfs/nfsdiskless.h> 81 #include <xen/if_xennetvar.h> 82 #endif 83 84 #include <machine/pte.h> 85 #include <machine/cpu.h> 86 #include <machine/gdt.h> 87 #include <machine/pcb.h> 88 #include <machine/bootinfo.h> 89 90 static void findroot(void); 91 static int is_valid_disk(device_t); 92 static void handle_wedges(device_t, int); 93 94 struct disklist *x86_alldisks; 95 int x86_ndisks; 96 97 #include "bios32.h" 98 #if NBIOS32 > 0 99 #include <machine/bios32.h> 100 #endif 101 102 #include "opt_pcibios.h" 103 #ifdef PCIBIOS 104 #include <dev/pci/pcireg.h> 105 #include <dev/pci/pcivar.h> 106 #include <i386/pci/pcibios.h> 107 #endif 108 109 #include "opt_kvm86.h" 110 #ifdef KVM86 111 #include <machine/kvm86.h> 112 #endif 113 114 /* 115 * Determine i/o configuration for a machine. 116 */ 117 void 118 cpu_configure(void) 119 { 120 121 startrtclock(); 122 123 #if NBIOS32 > 0 && defined(DOM0OPS) 124 if (xendomain_is_dom0()) 125 bios32_init(); 126 #endif /* NBIOS32 > 0 && DOM0OPS */ 127 #ifdef PCIBIOS 128 pcibios_init(); 129 #endif 130 131 #ifdef KVM86 132 kvm86_init(); 133 #endif 134 135 if (config_rootfound("mainbus", NULL) == NULL) 136 panic("configure: mainbus not configured"); 137 138 #ifdef INTRDEBUG 139 intr_printconfig(); 140 #endif 141 142 /* resync cr0 after FPU configuration */ 143 lwp0.l_addr->u_pcb.pcb_cr0 = rcr0(); 144 #ifdef MULTIPROCESSOR 145 /* propagate this to the idle pcb's. */ 146 cpu_init_idle_lwps(); 147 #endif 148 149 spl0(); 150 } 151 152 void 153 cpu_rootconf(void) 154 { 155 findroot(); 156 157 if (booted_wedge) { 158 KASSERT(booted_device != NULL); 159 printf("boot device: %s (%s)\n", 160 device_xname(booted_wedge), device_xname(booted_device)); 161 setroot(booted_wedge, 0); 162 } else { 163 printf("boot device: %s\n", 164 booted_device ? device_xname(booted_device) : "<unknown>"); 165 setroot(booted_device, booted_partition); 166 } 167 } 168 169 170 /* 171 * Attempt to find the device from which we were booted. 172 * If we can do so, and not instructed not to do so, 173 * change rootdev to correspond to the load device. 174 */ 175 void 176 findroot(void) 177 { 178 device_t dv; 179 union xen_cmdline_parseinfo xcp; 180 181 if (booted_device) 182 return; 183 184 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 185 186 TAILQ_FOREACH(dv, &alldevs, dv_list) { 187 bool is_ifnet, is_disk; 188 const char *devname; 189 190 is_ifnet = (device_class(dv) == DV_IFNET); 191 is_disk = is_valid_disk(dv); 192 devname = device_xname(dv); 193 194 if (!is_ifnet && !is_disk) 195 continue; 196 197 if (is_disk && xcp.xcp_bootdev[0] == 0) { 198 handle_wedges(dv, 0); 199 break; 200 } 201 202 if (strncmp(xcp.xcp_bootdev, devname, strlen(devname))) 203 continue; 204 205 if (is_disk && strlen(xcp.xcp_bootdev) > strlen(devname)) { 206 booted_partition = toupper( 207 xcp.xcp_bootdev[strlen(devname)]) - 'A'; 208 } 209 210 booted_device = dv; 211 break; 212 } 213 } 214 215 #include "pci.h" 216 217 #include <dev/isa/isavar.h> 218 #if NPCI > 0 219 #include <dev/pci/pcivar.h> 220 #endif 221 222 223 #if defined(NFS_BOOT_BOOTSTATIC) && defined(DOM0OPS) 224 static int 225 dom0_bootstatic_callback(struct nfs_diskless *nd) 226 { 227 #if 0 228 struct ifnet *ifp = nd->nd_ifp; 229 #endif 230 int flags = 0; 231 union xen_cmdline_parseinfo xcp; 232 struct sockaddr_in *sin; 233 234 memset(&xcp, 0, sizeof(xcp.xcp_netinfo)); 235 xcp.xcp_netinfo.xi_ifno = 0; /* XXX first interface hardcoded */ 236 xcp.xcp_netinfo.xi_root = nd->nd_root.ndm_host; 237 xen_parse_cmdline(XEN_PARSE_NETINFO, &xcp); 238 239 if (xcp.xcp_netinfo.xi_root[0] != '\0') { 240 flags |= NFS_BOOT_HAS_SERVER; 241 if (strchr(xcp.xcp_netinfo.xi_root, ':') != NULL) 242 flags |= NFS_BOOT_HAS_ROOTPATH; 243 } 244 245 nd->nd_myip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[0]); 246 nd->nd_gwip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[2]); 247 nd->nd_mask.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[3]); 248 249 sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr; 250 memset((void *)sin, 0, sizeof(*sin)); 251 sin->sin_len = sizeof(*sin); 252 sin->sin_family = AF_INET; 253 sin->sin_addr.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[1]); 254 255 if (nd->nd_myip.s_addr) 256 flags |= NFS_BOOT_HAS_MYIP; 257 if (nd->nd_gwip.s_addr) 258 flags |= NFS_BOOT_HAS_GWIP; 259 if (nd->nd_mask.s_addr) 260 flags |= NFS_BOOT_HAS_MASK; 261 if (sin->sin_addr.s_addr) 262 flags |= NFS_BOOT_HAS_SERVADDR; 263 264 return flags; 265 } 266 #endif 267 268 void 269 device_register(device_t dev, void *aux) 270 { 271 /* 272 * Handle network interfaces here, the attachment information is 273 * not available driver independently later. 274 * For disks, there is nothing useful available at attach time. 275 */ 276 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 || defined(DOM0OPS) 277 if (device_class(dev) == DV_IFNET) { 278 union xen_cmdline_parseinfo xcp; 279 280 #ifdef NFS_BOOT_BOOTSTATIC 281 #ifdef DOM0OPS 282 if (xendomain_is_privileged()) { 283 nfs_bootstatic_callback = dom0_bootstatic_callback; 284 } else 285 #endif 286 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 287 nfs_bootstatic_callback = xennet_bootstatic_callback; 288 #endif 289 #endif 290 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 291 if (strncmp(xcp.xcp_bootdev, device_xname(dev), 292 sizeof(xcp.xcp_bootdev)) == 0) 293 { 294 goto found; 295 } 296 } 297 #endif 298 if (device_class(dev) == DV_IFNET) { 299 struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF); 300 if (bin == NULL) 301 return; 302 303 /* 304 * We don't check the driver name against the device name 305 * passed by the boot ROM. The ROM should stay usable 306 * if the driver gets obsoleted. 307 * The physical attachment information (checked below) 308 * must be sufficient to identify the device. 309 */ 310 311 if (bin->bus == BI_BUS_ISA && 312 device_is_a(device_parent(dev), "isa")) { 313 struct isa_attach_args *iaa = aux; 314 315 /* compare IO base address */ 316 /* XXXJRT what about multiple I/O addrs? */ 317 if (iaa->ia_nio > 0 && 318 bin->addr.iobase == iaa->ia_io[0].ir_addr) 319 goto found; 320 } 321 #if NPCI > 0 322 if (bin->bus == BI_BUS_PCI && 323 device_is_a(device_parent(dev), "pci")) { 324 struct pci_attach_args *paa = aux; 325 int b, d, f; 326 327 /* 328 * Calculate BIOS representation of: 329 * 330 * <bus,device,function> 331 * 332 * and compare. 333 */ 334 pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f); 335 if (bin->addr.tag == ((b << 8) | (d << 3) | f)) 336 goto found; 337 } 338 #endif 339 } 340 return; 341 342 found: 343 if (booted_device) { 344 /* XXX should be a "panic()" */ 345 printf("warning: double match for boot device (%s, %s)\n", 346 device_xname(booted_device), device_xname(dev)); 347 return; 348 } 349 booted_device = dev; 350 } 351 352 static void 353 handle_wedges(device_t dv, int par) 354 { 355 if (config_handle_wedges(dv, par) == 0) 356 return; 357 booted_device = dv; 358 booted_partition = par; 359 } 360 361 static int 362 is_valid_disk(device_t dv) 363 { 364 365 if (device_class(dv) != DV_DISK) 366 return (0); 367 368 return (device_is_a(dv, "dk") || 369 device_is_a(dv, "sd") || 370 device_is_a(dv, "wd") || 371 device_is_a(dv, "ld") || 372 device_is_a(dv, "ed") || 373 device_is_a(dv, "xbd")); 374 } 375
Indexes created Fri Oct 03 02:09:57 GMT 2025