autoconf.c revision 1.18
1 /* $NetBSD: autoconf.c,v 1.18 2017/05/23 08:48:35 nonaka 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 1.18 2017/05/23 08:48:35 nonaka 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 int is_valid_disk(device_t); 90 91 struct disklist *x86_alldisks; 92 int x86_ndisks; 93 94 #include "bios32.h" 95 #if NBIOS32 > 0 96 #include <machine/bios32.h> 97 /* XXX */ 98 extern void platform_init(void); 99 #endif 100 101 #include "opt_pcibios.h" 102 #ifdef PCIBIOS 103 #include <dev/pci/pcireg.h> 104 #include <dev/pci/pcivar.h> 105 #include <i386/pci/pcibios.h> 106 #endif 107 108 /* 109 * Determine i/o configuration for a machine. 110 */ 111 void 112 cpu_configure(void) 113 { 114 struct pcb *pcb; 115 116 startrtclock(); 117 118 #if defined(DOM0OPS) 119 if (xendomain_is_dom0()) { 120 #if NBIOS32 > 0 121 bios32_init(); 122 platform_init(); 123 /* identify hypervisor type from SMBIOS */ 124 identify_hypervisor(); 125 #endif /* NBIOS32 > 0 */ 126 } else 127 #endif /* DOM0OPS */ 128 vm_guest = VM_GUEST_XEN; 129 #ifdef PCIBIOS 130 pcibios_init(); 131 #endif 132 133 if (config_rootfound("mainbus", NULL) == NULL) 134 panic("configure: mainbus not configured"); 135 136 #ifdef INTRDEBUG 137 intr_printconfig(); 138 #endif 139 140 /* resync cr0 after FPU configuration */ 141 pcb = lwp_getpcb(&lwp0); 142 pcb->pcb_cr0 = rcr0(); 143 #ifdef MULTIPROCESSOR 144 /* propagate this to the idle pcb's. */ 145 cpu_init_idle_lwps(); 146 #endif 147 148 spl0(); 149 } 150 151 void 152 cpu_rootconf(void) 153 { 154 cpu_bootconf(); 155 156 printf("boot device: %s\n", 157 booted_device ? device_xname(booted_device) : "<unknown>"); 158 rootconf(); 159 } 160 161 162 /* 163 * Attempt to find the device from which we were booted. 164 */ 165 void 166 cpu_bootconf(void) 167 { 168 device_t dv; 169 deviter_t di; 170 union xen_cmdline_parseinfo xcp; 171 172 if (booted_device) 173 return; 174 175 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 176 177 for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST); 178 dv != NULL; 179 dv = deviter_next(&di)) { 180 bool is_ifnet, is_disk; 181 const char *devname; 182 183 is_ifnet = (device_class(dv) == DV_IFNET); 184 is_disk = is_valid_disk(dv); 185 devname = device_xname(dv); 186 187 if (!is_ifnet && !is_disk) 188 continue; 189 190 if (is_disk && xcp.xcp_bootdev[0] == 0) { 191 booted_device = dv; 192 break; 193 } 194 195 if (strncmp(xcp.xcp_bootdev, devname, strlen(devname))) 196 continue; 197 198 if (is_disk && strlen(xcp.xcp_bootdev) > strlen(devname)) { 199 booted_partition = toupper( 200 xcp.xcp_bootdev[strlen(devname)]) - 'A'; 201 } 202 203 booted_device = dv; 204 break; 205 } 206 deviter_release(&di); 207 } 208 209 #include "pci.h" 210 211 #include <dev/isa/isavar.h> 212 #if NPCI > 0 213 #include <dev/pci/pcivar.h> 214 #endif 215 216 217 #if defined(NFS_BOOT_BOOTSTATIC) && defined(DOM0OPS) 218 static int 219 dom0_bootstatic_callback(struct nfs_diskless *nd) 220 { 221 #if 0 222 struct ifnet *ifp = nd->nd_ifp; 223 #endif 224 int flags = 0; 225 union xen_cmdline_parseinfo xcp; 226 struct sockaddr_in *sin; 227 228 memset(&xcp, 0, sizeof(xcp.xcp_netinfo)); 229 xcp.xcp_netinfo.xi_ifno = 0; /* XXX first interface hardcoded */ 230 xcp.xcp_netinfo.xi_root = nd->nd_root.ndm_host; 231 xen_parse_cmdline(XEN_PARSE_NETINFO, &xcp); 232 233 if (xcp.xcp_netinfo.xi_root[0] != '\0') { 234 flags |= NFS_BOOT_HAS_SERVER; 235 if (strchr(xcp.xcp_netinfo.xi_root, ':') != NULL) 236 flags |= NFS_BOOT_HAS_ROOTPATH; 237 } 238 239 nd->nd_myip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[0]); 240 nd->nd_gwip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[2]); 241 nd->nd_mask.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[3]); 242 243 sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr; 244 memset((void *)sin, 0, sizeof(*sin)); 245 sin->sin_len = sizeof(*sin); 246 sin->sin_family = AF_INET; 247 sin->sin_addr.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[1]); 248 249 if (nd->nd_myip.s_addr) 250 flags |= NFS_BOOT_HAS_MYIP; 251 if (nd->nd_gwip.s_addr) 252 flags |= NFS_BOOT_HAS_GWIP; 253 if (nd->nd_mask.s_addr) 254 flags |= NFS_BOOT_HAS_MASK; 255 if (sin->sin_addr.s_addr) 256 flags |= NFS_BOOT_HAS_SERVADDR; 257 258 return flags; 259 } 260 #endif 261 262 void 263 device_register(device_t dev, void *aux) 264 { 265 /* 266 * Handle network interfaces here, the attachment information is 267 * not available driver independently later. 268 * For disks, there is nothing useful available at attach time. 269 */ 270 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 || defined(DOM0OPS) 271 if (device_class(dev) == DV_IFNET) { 272 union xen_cmdline_parseinfo xcp; 273 274 #ifdef NFS_BOOT_BOOTSTATIC 275 #ifdef DOM0OPS 276 if (xendomain_is_privileged()) { 277 nfs_bootstatic_callback = dom0_bootstatic_callback; 278 } else 279 #endif 280 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 281 nfs_bootstatic_callback = xennet_bootstatic_callback; 282 #endif 283 #endif 284 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 285 if (strncmp(xcp.xcp_bootdev, device_xname(dev), 286 sizeof(xcp.xcp_bootdev)) == 0) 287 { 288 goto found; 289 } 290 } 291 #endif 292 if (device_class(dev) == DV_IFNET) { 293 struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF); 294 if (bin == NULL) 295 return; 296 297 /* 298 * We don't check the driver name against the device name 299 * passed by the boot ROM. The ROM should stay usable 300 * if the driver gets obsoleted. 301 * The physical attachment information (checked below) 302 * must be sufficient to identify the device. 303 */ 304 305 if (bin->bus == BI_BUS_ISA && 306 device_is_a(device_parent(dev), "isa")) { 307 struct isa_attach_args *iaa = aux; 308 309 /* compare IO base address */ 310 /* XXXJRT what about multiple I/O addrs? */ 311 if (iaa->ia_nio > 0 && 312 bin->addr.iobase == iaa->ia_io[0].ir_addr) 313 goto found; 314 } 315 #if NPCI > 0 316 if (bin->bus == BI_BUS_PCI && 317 device_is_a(device_parent(dev), "pci")) { 318 struct pci_attach_args *paa = aux; 319 int b, d, f; 320 321 /* 322 * Calculate BIOS representation of: 323 * 324 * <bus,device,function> 325 * 326 * and compare. 327 */ 328 pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f); 329 if (bin->addr.tag == ((b << 8) | (d << 3) | f)) 330 goto found; 331 } 332 #endif 333 } 334 return; 335 336 found: 337 if (booted_device) { 338 /* XXX should be a "panic()" */ 339 printf("warning: double match for boot device (%s, %s)\n", 340 device_xname(booted_device), device_xname(dev)); 341 return; 342 } 343 booted_device = dev; 344 } 345 346 static int 347 is_valid_disk(device_t dv) 348 { 349 350 if (device_class(dv) != DV_DISK) 351 return (0); 352 353 return (device_is_a(dv, "dk") || 354 device_is_a(dv, "sd") || 355 device_is_a(dv, "wd") || 356 device_is_a(dv, "ld") || 357 device_is_a(dv, "ed") || 358 device_is_a(dv, "xbd")); 359 } 360
Indexes created Fri Oct 03 02:09:57 GMT 2025