autoconf.c revision 1.22
1 /* $NetBSD: autoconf.c,v 1.22 2019/01/28 21:19:09 bad 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 1.22 2019/01/28 21:19:09 bad Exp $"); 49 50 #include "opt_xen.h" 51 #include "opt_multiprocessor.h" 52 #include "opt_nfs_boot.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/buf.h> 57 #include <sys/disklabel.h> 58 #include <sys/disk.h> 59 #include <sys/conf.h> 60 #include <sys/device.h> 61 #include <sys/vnode.h> 62 #include <sys/fcntl.h> 63 #include <sys/dkio.h> 64 #include <sys/proc.h> 65 #include <sys/kauth.h> 66 67 #ifdef NFS_BOOT_BOOTSTATIC 68 #include <net/if.h> 69 #include <net/if_ether.h> 70 #include <netinet/in.h> 71 #include <nfs/rpcv2.h> 72 #include <nfs/nfsproto.h> 73 #include <nfs/nfs.h> 74 #include <nfs/nfsmount.h> 75 #include <nfs/nfsdiskless.h> 76 #include <xen/if_xennetvar.h> 77 #endif 78 79 #include <machine/pte.h> 80 #include <machine/cpu.h> 81 #include <machine/gdt.h> 82 #include <machine/pcb.h> 83 #include <machine/bootinfo.h> 84 85 static int is_valid_disk(device_t); 86 87 struct disklist *x86_alldisks; 88 int x86_ndisks; 89 90 #include "bios32.h" 91 #if NBIOS32 > 0 92 #include <machine/bios32.h> 93 /* XXX */ 94 extern void platform_init(void); 95 #endif 96 97 #include "opt_pcibios.h" 98 #ifdef PCIBIOS 99 #include <dev/pci/pcireg.h> 100 #include <dev/pci/pcivar.h> 101 #include <i386/pci/pcibios.h> 102 #endif 103 104 #ifdef DEBUG_GEOM 105 #define DPRINTF(a) printf a 106 #else 107 #define DPRINTF(a) 108 #endif 109 110 /* 111 * Determine i/o configuration for a machine. 112 */ 113 void 114 cpu_configure(void) 115 { 116 struct pcb *pcb; 117 118 startrtclock(); 119 120 #if defined(DOM0OPS) 121 if (xendomain_is_dom0()) { 122 #if NBIOS32 > 0 123 bios32_init(); 124 platform_init(); 125 /* identify hypervisor type from SMBIOS */ 126 identify_hypervisor(); 127 #endif /* NBIOS32 > 0 */ 128 } else 129 #endif /* DOM0OPS */ 130 vm_guest = VM_GUEST_XEN; 131 #ifdef PCIBIOS 132 pcibios_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 #if NIOAPIC > 0 143 ioapic_enable(); 144 #endif 145 /* resync cr0 after FPU configuration */ 146 pcb = lwp_getpcb(&lwp0); 147 pcb->pcb_cr0 = rcr0(); 148 #ifdef MULTIPROCESSOR 149 /* propagate this to the idle pcb's. */ 150 cpu_init_idle_lwps(); 151 #endif 152 153 spl0(); 154 } 155 156 void 157 cpu_rootconf(void) 158 { 159 cpu_bootconf(); 160 161 printf("boot device: %s\n", 162 booted_device ? device_xname(booted_device) : 163 bootspec ? bootspec : "<unknown>"); 164 rootconf(); 165 } 166 167 168 /* 169 * Attempt to find the device from which we were booted. 170 */ 171 void 172 cpu_bootconf(void) 173 { 174 device_t dv; 175 deviter_t di; 176 union xen_cmdline_parseinfo xcp; 177 static char bootspecbuf[sizeof(xcp.xcp_bootdev)]; 178 179 if (booted_device) { 180 DPRINTF(("%s: preset booted_device: %s\n", __func__, device_xname(booted_device))); 181 return; 182 } 183 184 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 185 186 for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST); 187 dv != NULL; 188 dv = deviter_next(&di)) { 189 bool is_ifnet, is_disk; 190 const char *devname; 191 192 is_ifnet = (device_class(dv) == DV_IFNET); 193 is_disk = is_valid_disk(dv); 194 devname = device_xname(dv); 195 196 if (!is_ifnet && !is_disk) 197 continue; 198 199 if (is_disk && xcp.xcp_bootdev[0] == 0) { 200 booted_device = dv; 201 break; 202 } 203 204 if (strncmp(xcp.xcp_bootdev, devname, strlen(devname))) 205 continue; 206 207 if (is_disk && strlen(xcp.xcp_bootdev) > strlen(devname)) { 208 /* XXX check device_cfdata as in x86_autoconf.c? */ 209 booted_partition = toupper( 210 xcp.xcp_bootdev[strlen(devname)]) - 'A'; 211 DPRINTF(("%s: booted_partition: %d\n", __func__, booted_partition)); 212 } 213 214 booted_device = dv; 215 booted_method = "bootinfo/bootdev"; 216 break; 217 } 218 deviter_release(&di); 219 220 if (booted_device) { 221 DPRINTF(("%s: booted_device: %s\n", __func__, device_xname(booted_device))); 222 return; 223 } 224 225 /* 226 * not a boot device name, pass through to MI code 227 */ 228 if (xcp.xcp_bootdev[0] != '\0') { 229 strlcpy(bootspecbuf, xcp.xcp_bootdev, sizeof(bootspecbuf)); 230 bootspec = bootspecbuf; 231 booted_method = "bootinfo/bootspec"; 232 DPRINTF(("%s: bootspec: %s\n", __func__, bootspec)); 233 return; 234 } 235 } 236 237 #include "pci.h" 238 239 #include <dev/isa/isavar.h> 240 #if NPCI > 0 241 #include <dev/pci/pcivar.h> 242 #endif 243 244 245 #if defined(NFS_BOOT_BOOTSTATIC) && defined(DOM0OPS) 246 static int 247 dom0_bootstatic_callback(struct nfs_diskless *nd) 248 { 249 #if 0 250 struct ifnet *ifp = nd->nd_ifp; 251 #endif 252 int flags = 0; 253 union xen_cmdline_parseinfo xcp; 254 struct sockaddr_in *sin; 255 256 memset(&xcp, 0, sizeof(xcp.xcp_netinfo)); 257 xcp.xcp_netinfo.xi_ifno = 0; /* XXX first interface hardcoded */ 258 xcp.xcp_netinfo.xi_root = nd->nd_root.ndm_host; 259 xen_parse_cmdline(XEN_PARSE_NETINFO, &xcp); 260 261 if (xcp.xcp_netinfo.xi_root[0] != '\0') { 262 flags |= NFS_BOOT_HAS_SERVER; 263 if (strchr(xcp.xcp_netinfo.xi_root, ':') != NULL) 264 flags |= NFS_BOOT_HAS_ROOTPATH; 265 } 266 267 nd->nd_myip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[0]); 268 nd->nd_gwip.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[2]); 269 nd->nd_mask.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[3]); 270 271 sin = (struct sockaddr_in *) &nd->nd_root.ndm_saddr; 272 memset((void *)sin, 0, sizeof(*sin)); 273 sin->sin_len = sizeof(*sin); 274 sin->sin_family = AF_INET; 275 sin->sin_addr.s_addr = ntohl(xcp.xcp_netinfo.xi_ip[1]); 276 277 if (nd->nd_myip.s_addr) 278 flags |= NFS_BOOT_HAS_MYIP; 279 if (nd->nd_gwip.s_addr) 280 flags |= NFS_BOOT_HAS_GWIP; 281 if (nd->nd_mask.s_addr) 282 flags |= NFS_BOOT_HAS_MASK; 283 if (sin->sin_addr.s_addr) 284 flags |= NFS_BOOT_HAS_SERVADDR; 285 286 return flags; 287 } 288 #endif 289 290 void 291 device_register(device_t dev, void *aux) 292 { 293 /* 294 * Handle network interfaces here, the attachment information is 295 * not available driver independently later. 296 * For disks, there is nothing useful available at attach time. 297 */ 298 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 || defined(DOM0OPS) 299 if (device_class(dev) == DV_IFNET) { 300 union xen_cmdline_parseinfo xcp; 301 302 #ifdef NFS_BOOT_BOOTSTATIC 303 #ifdef DOM0OPS 304 if (xendomain_is_privileged()) { 305 nfs_bootstatic_callback = dom0_bootstatic_callback; 306 } else 307 #endif 308 #if NXENNET_HYPERVISOR > 0 || NXENNET_XENBUS > 0 309 nfs_bootstatic_callback = xennet_bootstatic_callback; 310 #endif 311 #endif 312 xen_parse_cmdline(XEN_PARSE_BOOTDEV, &xcp); 313 if (strncmp(xcp.xcp_bootdev, device_xname(dev), 314 sizeof(xcp.xcp_bootdev)) == 0) 315 { 316 goto found; 317 } 318 } 319 #endif 320 if (device_class(dev) == DV_IFNET) { 321 struct btinfo_netif *bin = lookup_bootinfo(BTINFO_NETIF); 322 if (bin == NULL) 323 return; 324 325 /* 326 * We don't check the driver name against the device name 327 * passed by the boot ROM. The ROM should stay usable 328 * if the driver gets obsoleted. 329 * The physical attachment information (checked below) 330 * must be sufficient to identify the device. 331 */ 332 333 if (bin->bus == BI_BUS_ISA && 334 device_is_a(device_parent(dev), "isa")) { 335 struct isa_attach_args *iaa = aux; 336 337 /* compare IO base address */ 338 /* XXXJRT what about multiple I/O addrs? */ 339 if (iaa->ia_nio > 0 && 340 bin->addr.iobase == iaa->ia_io[0].ir_addr) 341 goto found; 342 } 343 #if NPCI > 0 344 if (bin->bus == BI_BUS_PCI && 345 device_is_a(device_parent(dev), "pci")) { 346 struct pci_attach_args *paa = aux; 347 int b, d, f; 348 349 /* 350 * Calculate BIOS representation of: 351 * 352 * <bus,device,function> 353 * 354 * and compare. 355 */ 356 pci_decompose_tag(paa->pa_pc, paa->pa_tag, &b, &d, &f); 357 if (bin->addr.tag == ((b << 8) | (d << 3) | f)) 358 goto found; 359 } 360 #endif 361 } 362 return; 363 364 found: 365 if (booted_device) { 366 /* XXX should be a "panic()" */ 367 printf("warning: double match for boot device (%s, %s)\n", 368 device_xname(booted_device), device_xname(dev)); 369 return; 370 } 371 booted_device = dev; 372 } 373 374 static int 375 is_valid_disk(device_t dv) 376 { 377 if (device_class(dv) != DV_DISK) 378 return (0); 379 380 return (device_is_a(dv, "dk") || 381 device_is_a(dv, "sd") || 382 device_is_a(dv, "wd") || 383 device_is_a(dv, "ld") || 384 device_is_a(dv, "ed") || 385 device_is_a(dv, "xbd")); 386 } 387
Indexes created Fri Oct 03 02:09:57 GMT 2025