autoconf.c revision 1.7
1 /* $NetBSD: autoconf.c,v 1.7 2008/10/27 10:58:22 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 1.7 2008/10/27 10:58:22 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 #include "xennet_hypervisor.h" 55 #include "xennet_xenbus.h" 56 57 #include <sys/param.h> 58 #include <sys/systm.h> 59 #include <sys/buf.h> 60 #include <sys/disklabel.h> 61 #include <sys/disk.h> 62 #include <sys/conf.h> 63 #ifdef COMPAT_OLDBOOT 64 #include <sys/reboot.h> 65 #endif 66 #include <sys/device.h> 67 #include <sys/malloc.h> 68 #include <sys/vnode.h> 69 #include <sys/fcntl.h> 70 #include <sys/dkio.h> 71 #include <sys/proc.h> 72 #include <sys/user.h> 73 #include <sys/kauth.h> 74 75 #ifdef NFS_BOOT_BOOTSTATIC 76 #include <net/if.h> 77 #include <net/if_ether.h> 78 #include <netinet/in.h> 79 #include <nfs/rpcv2.h> 80 #include <nfs/nfsproto.h> 81 #include <nfs/nfs.h> 82 #include <nfs/nfsmount.h> 83 #include <nfs/nfsdiskless.h> 84 #include <xen/if_xennetvar.h> 85 #endif 86 87 #include <machine/pte.h> 88 #include <machine/cpu.h> 89 #include <machine/gdt.h> 90 #include <machine/pcb.h> 91 #include <machine/bootinfo.h> 92 93 static void findroot(void); 94 static int is_valid_disk(device_t); 95 static void handle_wedges(device_t, int); 96 97 struct disklist *x86_alldisks; 98 int x86_ndisks; 99 100 #include "bios32.h" 101 #if NBIOS32 > 0 102 #include <machine/bios32.h> 103 #endif 104 105 #include "opt_pcibios.h" 106 #ifdef PCIBIOS 107 #include <dev/pci/pcireg.h> 108 #include <dev/pci/pcivar.h> 109 #include <i386/pci/pcibios.h> 110 #endif 111 112 #include "opt_kvm86.h" 113 #ifdef KVM86 114 #include <machine/kvm86.h> 115 #endif 116 117 /* 118 * Determine i/o configuration for a machine. 119 */ 120 void 121 cpu_configure(void) 122 { 123 124 startrtclock(); 125 126 #if NBIOS32 > 0 && defined(DOM0OPS) 127 #ifdef XEN3 128 if (xendomain_is_dom0()) 129 #endif 130 bios32_init(); 131 #endif /* NBIOS32 > 0 && DOM0OPS */ 132 #ifdef PCIBIOS 133 pcibios_init(); 134 #endif 135 136 #ifdef KVM86 137 kvm86_init(); 138 #endif 139 140 if (config_rootfound("mainbus", NULL) == NULL) 141 panic("configure: mainbus not configured"); 142 143 #ifdef INTRDEBUG 144 intr_printconfig(); 145 #endif 146 147 /* resync cr0 after FPU configuration */ 148 lwp0.l_addr->u_pcb.pcb_cr0 = rcr0(); 149 #ifdef MULTIPROCESSOR 150 /* propagate this to the idle pcb's. */ 151 cpu_init_idle_lwps(); 152 #endif 153 154 spl0(); 155 } 156 157 void 158 cpu_rootconf(void) 159 { 160 findroot(); 161 162 if (booted_wedge) { 163 KASSERT(booted_device != NULL); 164 printf("boot device: %s (%s)\n", 165 device_xname(booted_wedge), device_xname(booted_device)); 166 setroot(booted_wedge, 0); 167 } else { 168 printf("boot device: %s\n", 169 booted_device ? device_xname(booted_device) : "<unknown>"); 170 setroot(booted_device, booted_partition); 171 } 172 } 173 174 175 /* 176 * Attempt to find the device from which we were booted. 177 * If we can do so, and not instructed not to do so, 178 * change rootdev to correspond to the load device. 179 */ 180 void 181 findroot(void) 182 { 183 device_t dv; 184 union xen_cmdline_parseinfo xcp; 185 186 if (booted_device) 187 return; 188 189 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 190 191 TAILQ_FOREACH(dv, &alldevs, dv_list) { 192 bool is_ifnet, is_disk; 193 const char *devname; 194 195 is_ifnet = (device_class(dv) == DV_IFNET); 196 is_disk = is_valid_disk(dv); 197 devname = device_xname(dv); 198 199 if (!is_ifnet && !is_disk) 200 continue; 201 202 if (is_disk && xcp.xcp_bootdev[0] == 0) { 203 handle_wedges(dv, 0); 204 break; 205 } 206 207 if (strncmp(xcp.xcp_bootdev, devname, strlen(devname))) 208 continue; 209 210 if (is_disk && strlen(xcp.xcp_bootdev) > strlen(devname)) { 211 booted_partition = toupper( 212 xcp.xcp_bootdev[strlen(devname)]) - 'A'; 213 } 214 215 booted_device = dv; 216 break; 217 } 218 } 219 220 #include "pci.h" 221 222 #include <dev/isa/isavar.h> 223 #if NPCI > 0 224 #include <dev/pci/pcivar.h> 225 #endif 226 227 228 #if defined(NFS_BOOT_BOOTSTATIC) && defined(DOM0OPS) 229 static int 230 dom0_bootstatic_callback(struct nfs_diskless *nd) 231 { 232 #if 0 233 struct ifnet *ifp = nd->nd_ifp; 234 #endif 235 int flags = 0; 236 union xen_cmdline_parseinfo xcp; 237 struct sockaddr_in *sin; 238 239 memset(&xcp, 0, sizeof(xcp.xcp_netinfo)); 240 xcp.xcp_netinfo.xi_ifno = 0; /* XXX first interface hardcoded */ 241 xcp.xcp_netinfo.xi_root = nd->nd_root.ndm_host; 242 xen_parse_cmdline(XEN_PARSE_NETINFO, &xcp); 243 244 if (xcp.xcp_netinfo.xi_root[0] != '\0') { 245 flags |= NFS_BOOT_HAS_SERVER; 246 if (strchr(xcp.xcp_netinfo.xi_root, ':') != NULL) 247 flags |= NFS_BOOT_HAS_ROOTPATH; 248 } 249 250 nd->nd_myip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[0]); 251 nd->nd_gwip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[2]); 252 nd->nd_mask.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[3]); 253 254 sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr; 255 memset((void *)sin, 0, sizeof(*sin)); 256 sin->sin_len = sizeof(*sin); 257 sin->sin_family = AF_INET; 258 sin->sin_addr.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[1]); 259 260 if (nd->nd_myip.s_addr) 261 flags |= NFS_BOOT_HAS_MYIP; 262 if (nd->nd_gwip.s_addr) 263 flags |= NFS_BOOT_HAS_GWIP; 264 if (nd->nd_mask.s_addr) 265 flags |= NFS_BOOT_HAS_MASK; 266 if (sin->sin_addr.s_addr) 267 flags |= NFS_BOOT_HAS_SERVADDR; 268 269 return flags; 270 } 271 #endif 272 273 void 274 device_register(device_t dev, void *aux) 275 { 276 /* 277 * Handle network interfaces here, the attachment information is 278 * not available driver independently later. 279 * For disks, there is nothing useful available at attach time. 280 */ 281 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 || defined(DOM0OPS) 282 if (device_class(dev) == DV_IFNET) { 283 union xen_cmdline_parseinfo xcp; 284 285 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 286 if (strncmp(xcp.xcp_bootdev, device_xname(dev), 287 sizeof(xcp.xcp_bootdev)) == 0) { 288 #ifdef NFS_BOOT_BOOTSTATIC 289 #ifdef DOM0OPS 290 if (xendomain_is_privileged()) { 291 nfs_bootstatic_callback = dom0_bootstatic_callback; 292 } else 293 #endif 294 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 295 nfs_bootstatic_callback = xennet_bootstatic_callback; 296 #endif 297 #endif 298 goto found; 299 } 300 } 301 #endif 302 if (device_class(dev) == DV_IFNET) { 303 struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF); 304 if (bin == NULL) 305 return; 306 307 /* 308 * We don't check the driver name against the device name 309 * passed by the boot ROM. The ROM should stay usable 310 * if the driver gets obsoleted. 311 * The physical attachment information (checked below) 312 * must be sufficient to identify the device. 313 */ 314 315 if (bin->bus == BI_BUS_ISA && 316 device_is_a(device_parent(dev), "isa")) { 317 struct isa_attach_args *iaa = aux; 318 319 /* compare IO base address */ 320 /* XXXJRT what about multiple I/O addrs? */ 321 if (iaa->ia_nio > 0 && 322 bin->addr.iobase == iaa->ia_io[0].ir_addr) 323 goto found; 324 } 325 #if NPCI > 0 326 if (bin->bus == BI_BUS_PCI && 327 device_is_a(device_parent(dev), "pci")) { 328 struct pci_attach_args *paa = aux; 329 int b, d, f; 330 331 /* 332 * Calculate BIOS representation of: 333 * 334 * <bus,device,function> 335 * 336 * and compare. 337 */ 338 pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f); 339 if (bin->addr.tag == ((b << 8) | (d << 3) | f)) 340 goto found; 341 } 342 #endif 343 } 344 return; 345 346 found: 347 if (booted_device) { 348 /* XXX should be a "panic()" */ 349 printf("warning: double match for boot device (%s, %s)\n", 350 device_xname(booted_device), device_xname(dev)); 351 return; 352 } 353 booted_device = dev; 354 } 355 356 static void 357 handle_wedges(device_t dv, int par) 358 { 359 if (config_handle_wedges(dv, par) == 0) 360 return; 361 booted_device = dv; 362 booted_partition = par; 363 } 364 365 static int 366 is_valid_disk(device_t dv) 367 { 368 369 if (device_class(dv) != DV_DISK) 370 return (0); 371 372 return (device_is_a(dv, "dk") || 373 device_is_a(dv, "sd") || 374 device_is_a(dv, "wd") || 375 device_is_a(dv, "ld") || 376 device_is_a(dv, "ed") || 377 device_is_a(dv, "xbd")); 378 } 379
Indexes created Fri Oct 03 02:09:57 GMT 2025