autoconf.c revision 1.13.12.1
1 /* $NetBSD: autoconf.c,v 1.13.12.1 2012/10/30 17:20:36 yamt 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 1.13.12.1 2012/10/30 17:20:36 yamt 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 /* 108 * Determine i/o configuration for a machine. 109 */ 110 void 111 cpu_configure(void) 112 { 113 struct pcb *pcb; 114 115 startrtclock(); 116 117 #if NBIOS32 > 0 && defined(DOM0OPS) 118 if (xendomain_is_dom0()) 119 bios32_init(); 120 #endif /* NBIOS32 > 0 && DOM0OPS */ 121 #ifdef PCIBIOS 122 pcibios_init(); 123 #endif 124 125 if (config_rootfound("mainbus", NULL) == NULL) 126 panic("configure: mainbus not configured"); 127 128 #ifdef INTRDEBUG 129 intr_printconfig(); 130 #endif 131 132 /* resync cr0 after FPU configuration */ 133 pcb = lwp_getpcb(&lwp0); 134 pcb->pcb_cr0 = rcr0(); 135 #ifdef MULTIPROCESSOR 136 /* propagate this to the idle pcb's. */ 137 cpu_init_idle_lwps(); 138 #endif 139 140 spl0(); 141 } 142 143 void 144 cpu_rootconf(void) 145 { 146 findroot(); 147 148 printf("boot device: %s\n", 149 booted_device ? device_xname(booted_device) : "<unknown>"); 150 rootconf(); 151 } 152 153 154 /* 155 * Attempt to find the device from which we were booted. 156 * If we can do so, and not instructed not to do so, 157 * change rootdev to correspond to the load device. 158 */ 159 void 160 findroot(void) 161 { 162 device_t dv; 163 deviter_t di; 164 union xen_cmdline_parseinfo xcp; 165 166 if (booted_device) 167 return; 168 169 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 170 171 for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST); 172 dv != NULL; 173 dv = deviter_next(&di)) { 174 bool is_ifnet, is_disk; 175 const char *devname; 176 177 is_ifnet = (device_class(dv) == DV_IFNET); 178 is_disk = is_valid_disk(dv); 179 devname = device_xname(dv); 180 181 if (!is_ifnet && !is_disk) 182 continue; 183 184 if (is_disk && xcp.xcp_bootdev[0] == 0) { 185 booted_device = dv; 186 break; 187 } 188 189 if (strncmp(xcp.xcp_bootdev, devname, strlen(devname))) 190 continue; 191 192 if (is_disk && strlen(xcp.xcp_bootdev) > strlen(devname)) { 193 booted_partition = toupper( 194 xcp.xcp_bootdev[strlen(devname)]) - 'A'; 195 } 196 197 booted_device = dv; 198 break; 199 } 200 deviter_release(&di); 201 } 202 203 #include "pci.h" 204 205 #include <dev/isa/isavar.h> 206 #if NPCI > 0 207 #include <dev/pci/pcivar.h> 208 #endif 209 210 211 #if defined(NFS_BOOT_BOOTSTATIC) && defined(DOM0OPS) 212 static int 213 dom0_bootstatic_callback(struct nfs_diskless *nd) 214 { 215 #if 0 216 struct ifnet *ifp = nd->nd_ifp; 217 #endif 218 int flags = 0; 219 union xen_cmdline_parseinfo xcp; 220 struct sockaddr_in *sin; 221 222 memset(&xcp, 0, sizeof(xcp.xcp_netinfo)); 223 xcp.xcp_netinfo.xi_ifno = 0; /* XXX first interface hardcoded */ 224 xcp.xcp_netinfo.xi_root = nd->nd_root.ndm_host; 225 xen_parse_cmdline(XEN_PARSE_NETINFO, &xcp); 226 227 if (xcp.xcp_netinfo.xi_root[0] != '\0') { 228 flags |= NFS_BOOT_HAS_SERVER; 229 if (strchr(xcp.xcp_netinfo.xi_root, ':') != NULL) 230 flags |= NFS_BOOT_HAS_ROOTPATH; 231 } 232 233 nd->nd_myip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[0]); 234 nd->nd_gwip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[2]); 235 nd->nd_mask.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[3]); 236 237 sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr; 238 memset((void *)sin, 0, sizeof(*sin)); 239 sin->sin_len = sizeof(*sin); 240 sin->sin_family = AF_INET; 241 sin->sin_addr.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[1]); 242 243 if (nd->nd_myip.s_addr) 244 flags |= NFS_BOOT_HAS_MYIP; 245 if (nd->nd_gwip.s_addr) 246 flags |= NFS_BOOT_HAS_GWIP; 247 if (nd->nd_mask.s_addr) 248 flags |= NFS_BOOT_HAS_MASK; 249 if (sin->sin_addr.s_addr) 250 flags |= NFS_BOOT_HAS_SERVADDR; 251 252 return flags; 253 } 254 #endif 255 256 void 257 device_register(device_t dev, void *aux) 258 { 259 /* 260 * Handle network interfaces here, the attachment information is 261 * not available driver independently later. 262 * For disks, there is nothing useful available at attach time. 263 */ 264 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 || defined(DOM0OPS) 265 if (device_class(dev) == DV_IFNET) { 266 union xen_cmdline_parseinfo xcp; 267 268 #ifdef NFS_BOOT_BOOTSTATIC 269 #ifdef DOM0OPS 270 if (xendomain_is_privileged()) { 271 nfs_bootstatic_callback = dom0_bootstatic_callback; 272 } else 273 #endif 274 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 275 nfs_bootstatic_callback = xennet_bootstatic_callback; 276 #endif 277 #endif 278 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 279 if (strncmp(xcp.xcp_bootdev, device_xname(dev), 280 sizeof(xcp.xcp_bootdev)) == 0) 281 { 282 goto found; 283 } 284 } 285 #endif 286 if (device_class(dev) == DV_IFNET) { 287 struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF); 288 if (bin == NULL) 289 return; 290 291 /* 292 * We don't check the driver name against the device name 293 * passed by the boot ROM. The ROM should stay usable 294 * if the driver gets obsoleted. 295 * The physical attachment information (checked below) 296 * must be sufficient to identify the device. 297 */ 298 299 if (bin->bus == BI_BUS_ISA && 300 device_is_a(device_parent(dev), "isa")) { 301 struct isa_attach_args *iaa = aux; 302 303 /* compare IO base address */ 304 /* XXXJRT what about multiple I/O addrs? */ 305 if (iaa->ia_nio > 0 && 306 bin->addr.iobase == iaa->ia_io[0].ir_addr) 307 goto found; 308 } 309 #if NPCI > 0 310 if (bin->bus == BI_BUS_PCI && 311 device_is_a(device_parent(dev), "pci")) { 312 struct pci_attach_args *paa = aux; 313 int b, d, f; 314 315 /* 316 * Calculate BIOS representation of: 317 * 318 * <bus,device,function> 319 * 320 * and compare. 321 */ 322 pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f); 323 if (bin->addr.tag == ((b << 8) | (d << 3) | f)) 324 goto found; 325 } 326 #endif 327 } 328 return; 329 330 found: 331 if (booted_device) { 332 /* XXX should be a "panic()" */ 333 printf("warning: double match for boot device (%s, %s)\n", 334 device_xname(booted_device), device_xname(dev)); 335 return; 336 } 337 booted_device = dev; 338 } 339 340 static int 341 is_valid_disk(device_t dv) 342 { 343 344 if (device_class(dv) != DV_DISK) 345 return (0); 346 347 return (device_is_a(dv, "dk") || 348 device_is_a(dv, "sd") || 349 device_is_a(dv, "wd") || 350 device_is_a(dv, "ld") || 351 device_is_a(dv, "ed") || 352 device_is_a(dv, "xbd")); 353 } 354
Indexes created Fri Oct 03 02:09:57 GMT 2025