autoconf.c revision 1.15
1 /* $NetBSD: autoconf.c,v 1.15 2012/07/29 18:05:47 mlelstv 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 1.15 2012/07/29 18:05:47 mlelstv 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/kauth.h> 70 71 #ifdef NFS_BOOT_BOOTSTATIC 72 #include <net/if.h> 73 #include <net/if_ether.h> 74 #include <netinet/in.h> 75 #include <nfs/rpcv2.h> 76 #include <nfs/nfsproto.h> 77 #include <nfs/nfs.h> 78 #include <nfs/nfsmount.h> 79 #include <nfs/nfsdiskless.h> 80 #include <xen/if_xennetvar.h> 81 #endif 82 83 #include <machine/pte.h> 84 #include <machine/cpu.h> 85 #include <machine/gdt.h> 86 #include <machine/pcb.h> 87 #include <machine/bootinfo.h> 88 89 static void findroot(void); 90 static int is_valid_disk(device_t); 91 92 struct disklist *x86_alldisks; 93 int x86_ndisks; 94 95 #include "bios32.h" 96 #if NBIOS32 > 0 97 #include <machine/bios32.h> 98 #endif 99 100 #include "opt_pcibios.h" 101 #ifdef PCIBIOS 102 #include <dev/pci/pcireg.h> 103 #include <dev/pci/pcivar.h> 104 #include <i386/pci/pcibios.h> 105 #endif 106 107 #include "opt_kvm86.h" 108 #ifdef KVM86 109 #include <machine/kvm86.h> 110 #endif 111 112 /* 113 * Determine i/o configuration for a machine. 114 */ 115 void 116 cpu_configure(void) 117 { 118 struct pcb *pcb; 119 120 startrtclock(); 121 122 #if NBIOS32 > 0 && defined(DOM0OPS) 123 if (xendomain_is_dom0()) 124 bios32_init(); 125 #endif /* NBIOS32 > 0 && DOM0OPS */ 126 #ifdef PCIBIOS 127 pcibios_init(); 128 #endif 129 130 #ifdef KVM86 131 kvm86_init(); 132 #endif 133 134 if (config_rootfound("mainbus", NULL) == NULL) 135 panic("configure: mainbus not configured"); 136 137 #ifdef INTRDEBUG 138 intr_printconfig(); 139 #endif 140 141 /* resync cr0 after FPU configuration */ 142 pcb = lwp_getpcb(&lwp0); 143 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 printf("boot device: %s\n", 158 booted_device ? device_xname(booted_device) : "<unknown>"); 159 rootconf(); 160 } 161 162 163 /* 164 * Attempt to find the device from which we were booted. 165 * If we can do so, and not instructed not to do so, 166 * change rootdev to correspond to the load device. 167 */ 168 void 169 findroot(void) 170 { 171 device_t dv; 172 deviter_t di; 173 union xen_cmdline_parseinfo xcp; 174 175 if (booted_device) 176 return; 177 178 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 179 180 for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST); 181 dv != NULL; 182 dv = deviter_next(&di)) { 183 bool is_ifnet, is_disk; 184 const char *devname; 185 186 is_ifnet = (device_class(dv) == DV_IFNET); 187 is_disk = is_valid_disk(dv); 188 devname = device_xname(dv); 189 190 if (!is_ifnet && !is_disk) 191 continue; 192 193 if (is_disk && xcp.xcp_bootdev[0] == 0) { 194 booted_device = dv; 195 break; 196 } 197 198 if (strncmp(xcp.xcp_bootdev, devname, strlen(devname))) 199 continue; 200 201 if (is_disk && strlen(xcp.xcp_bootdev) > strlen(devname)) { 202 booted_partition = toupper( 203 xcp.xcp_bootdev[strlen(devname)]) - 'A'; 204 } 205 206 booted_device = dv; 207 break; 208 } 209 deviter_release(&di); 210 } 211 212 #include "pci.h" 213 214 #include <dev/isa/isavar.h> 215 #if NPCI > 0 216 #include <dev/pci/pcivar.h> 217 #endif 218 219 220 #if defined(NFS_BOOT_BOOTSTATIC) && defined(DOM0OPS) 221 static int 222 dom0_bootstatic_callback(struct nfs_diskless *nd) 223 { 224 #if 0 225 struct ifnet *ifp = nd->nd_ifp; 226 #endif 227 int flags = 0; 228 union xen_cmdline_parseinfo xcp; 229 struct sockaddr_in *sin; 230 231 memset(&xcp, 0, sizeof(xcp.xcp_netinfo)); 232 xcp.xcp_netinfo.xi_ifno = 0; /* XXX first interface hardcoded */ 233 xcp.xcp_netinfo.xi_root = nd->nd_root.ndm_host; 234 xen_parse_cmdline(XEN_PARSE_NETINFO, &xcp); 235 236 if (xcp.xcp_netinfo.xi_root[0] != '\0') { 237 flags |= NFS_BOOT_HAS_SERVER; 238 if (strchr(xcp.xcp_netinfo.xi_root, ':') != NULL) 239 flags |= NFS_BOOT_HAS_ROOTPATH; 240 } 241 242 nd->nd_myip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[0]); 243 nd->nd_gwip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[2]); 244 nd->nd_mask.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[3]); 245 246 sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr; 247 memset((void *)sin, 0, sizeof(*sin)); 248 sin->sin_len = sizeof(*sin); 249 sin->sin_family = AF_INET; 250 sin->sin_addr.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[1]); 251 252 if (nd->nd_myip.s_addr) 253 flags |= NFS_BOOT_HAS_MYIP; 254 if (nd->nd_gwip.s_addr) 255 flags |= NFS_BOOT_HAS_GWIP; 256 if (nd->nd_mask.s_addr) 257 flags |= NFS_BOOT_HAS_MASK; 258 if (sin->sin_addr.s_addr) 259 flags |= NFS_BOOT_HAS_SERVADDR; 260 261 return flags; 262 } 263 #endif 264 265 void 266 device_register(device_t dev, void *aux) 267 { 268 /* 269 * Handle network interfaces here, the attachment information is 270 * not available driver independently later. 271 * For disks, there is nothing useful available at attach time. 272 */ 273 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 || defined(DOM0OPS) 274 if (device_class(dev) == DV_IFNET) { 275 union xen_cmdline_parseinfo xcp; 276 277 #ifdef NFS_BOOT_BOOTSTATIC 278 #ifdef DOM0OPS 279 if (xendomain_is_privileged()) { 280 nfs_bootstatic_callback = dom0_bootstatic_callback; 281 } else 282 #endif 283 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 284 nfs_bootstatic_callback = xennet_bootstatic_callback; 285 #endif 286 #endif 287 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 288 if (strncmp(xcp.xcp_bootdev, device_xname(dev), 289 sizeof(xcp.xcp_bootdev)) == 0) 290 { 291 goto found; 292 } 293 } 294 #endif 295 if (device_class(dev) == DV_IFNET) { 296 struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF); 297 if (bin == NULL) 298 return; 299 300 /* 301 * We don't check the driver name against the device name 302 * passed by the boot ROM. The ROM should stay usable 303 * if the driver gets obsoleted. 304 * The physical attachment information (checked below) 305 * must be sufficient to identify the device. 306 */ 307 308 if (bin->bus == BI_BUS_ISA && 309 device_is_a(device_parent(dev), "isa")) { 310 struct isa_attach_args *iaa = aux; 311 312 /* compare IO base address */ 313 /* XXXJRT what about multiple I/O addrs? */ 314 if (iaa->ia_nio > 0 && 315 bin->addr.iobase == iaa->ia_io[0].ir_addr) 316 goto found; 317 } 318 #if NPCI > 0 319 if (bin->bus == BI_BUS_PCI && 320 device_is_a(device_parent(dev), "pci")) { 321 struct pci_attach_args *paa = aux; 322 int b, d, f; 323 324 /* 325 * Calculate BIOS representation of: 326 * 327 * <bus,device,function> 328 * 329 * and compare. 330 */ 331 pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f); 332 if (bin->addr.tag == ((b << 8) | (d << 3) | f)) 333 goto found; 334 } 335 #endif 336 } 337 return; 338 339 found: 340 if (booted_device) { 341 /* XXX should be a "panic()" */ 342 printf("warning: double match for boot device (%s, %s)\n", 343 device_xname(booted_device), device_xname(dev)); 344 return; 345 } 346 booted_device = dev; 347 } 348 349 static int 350 is_valid_disk(device_t dv) 351 { 352 353 if (device_class(dv) != DV_DISK) 354 return (0); 355 356 return (device_is_a(dv, "dk") || 357 device_is_a(dv, "sd") || 358 device_is_a(dv, "wd") || 359 device_is_a(dv, "ld") || 360 device_is_a(dv, "ed") || 361 device_is_a(dv, "xbd")); 362 } 363
Indexes created Fri Oct 03 02:09:57 GMT 2025