2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
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16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
37 * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $
38 * $DragonFly: src/sys/i386/i386/Attic/autoconf.c,v 1.2 2003/06/17 04:28:35 dillon Exp $
42 * Setup the system to run on the current machine.
44 * Configure() is called at boot time and initializes the vba
45 * device tables and the memory controller monitoring. Available
46 * devices are determined (from possibilities mentioned in ioconf.c),
47 * and the drivers are initialized.
49 #include "opt_bootp.h"
51 #include "opt_cd9660.h"
53 #include "opt_nfsroot.h"
55 #include "opt_rootdevname.h"
59 #include <sys/param.h>
60 #include <sys/systm.h>
63 #include <sys/disklabel.h>
64 #include <sys/diskslice.h>
65 #include <sys/reboot.h>
66 #include <sys/kernel.h>
67 #include <sys/malloc.h>
68 #include <sys/mount.h>
71 #include <machine/bootinfo.h>
72 #include <machine/ipl.h>
73 #include <machine/md_var.h>
75 #include <machine/smp.h>
77 #include <i386/isa/icu.h>
81 #include <isa/isavar.h>
83 device_t isa_bus_device = 0;
86 static void configure_first __P((void *));
87 static void configure __P((void *));
88 static void configure_final __P((void *));
90 #if defined(FFS) && defined(FFS_ROOT)
91 static void setroot __P((void));
94 #if defined(NFS) && defined(NFS_ROOT)
95 static void pxe_setup_nfsdiskless(void);
98 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
99 /* SI_ORDER_SECOND is hookable */
100 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
101 /* SI_ORDER_MIDDLE is hookable */
102 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
104 dev_t rootdev = NODEV;
105 dev_t dumpdev = NODEV;
110 * Determine i/o configuration for a machine.
113 configure_first(dummy)
124 * Activate the ICU's. Note that we are explicitly at splhigh()
125 * at present as we have no way to disable stray PCI level triggered
126 * interrupts until the devices have had a driver attached. This
127 * is particularly a problem when the interrupts are shared. For
128 * example, if IRQ 10 is shared between a disk and network device
129 * and the disk device generates an interrupt, if we "activate"
130 * IRQ 10 when the network driver is set up, then we will get
131 * recursive interrupt 10's as nothing will know how to turn off
132 * the disk device's interrupt.
134 * Having the ICU's active means we can probe interrupt routing to
135 * see if a device causes the corresponding pending bit to be set.
137 * This is all rather inconvenient.
140 bsp_apic_configure();
147 /* nexus0 is the top of the i386 device tree */
148 device_add_child(root_bus, "nexus", 0);
150 /* initialize new bus architecture */
151 root_bus_configure();
155 * Explicitly probe and attach ISA last. The isa bus saves
156 * it's device node at attach time for us here.
159 isa_probe_children(isa_bus_device);
163 * Now we're ready to handle (pending) interrupts.
164 * XXX this is slightly misplaced.
169 * Allow lowering of the ipl to the lowest kernel level if we
170 * panic (or call tsleep() before clearing `cold'). No level is
171 * completely safe (since a panic may occur in a critical region
172 * at splhigh()), but we want at least bio interrupts to work.
178 configure_final(dummy)
192 * Print out the BIOS's idea of the disk geometries.
194 printf("BIOS Geometries:\n");
195 for (i = 0; i < N_BIOS_GEOM; i++) {
196 unsigned long bios_geom;
197 int max_cylinder, max_head, max_sector;
199 bios_geom = bootinfo.bi_bios_geom[i];
202 * XXX the bootstrap punts a 1200K floppy geometry
203 * when the get-disk-geometry interrupt fails. Skip
204 * drives that have this geometry.
206 if (bios_geom == 0x4f010f)
209 printf(" %x:%08lx ", i, bios_geom);
210 max_cylinder = bios_geom >> 16;
211 max_head = (bios_geom >> 8) & 0xff;
212 max_sector = bios_geom & 0xff;
214 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
215 max_cylinder, max_cylinder + 1,
216 max_head, max_head + 1,
217 max_sector, max_sector);
219 printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
221 printf("Device configuration finished.\n");
227 extern void bootpc_init(void);
230 * Do legacy root filesystem discovery.
238 #if defined(NFS) && defined(NFS_ROOT)
239 #if !defined(BOOTP_NFSROOT)
240 pxe_setup_nfsdiskless();
241 if (nfs_diskless_valid)
243 rootdevnames[0] = "nfs:";
245 #if defined(FFS) && defined(FFS_ROOT)
246 if (!rootdevnames[0])
250 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
252 u_long bootdev = 0; /* not a dev_t - encoding is different */
254 #if defined(FFS) && defined(FFS_ROOT)
256 #define FDUNITSHIFT 6
259 * Attempt to find the device from which we were booted.
260 * If we can do so, and not instructed not to do so,
261 * set rootdevs[] and rootdevnames[] to correspond to the
264 * This code survives in order to allow the system to be
265 * booted from legacy environments that do not correctly
266 * populate the kernel environment. There are significant
267 * restrictions on the bootability of the system in this
268 * situation; it can only be mounting root from a 'da'
269 * 'wd' or 'fd' device, and the root filesystem must be ufs.
274 int majdev, mindev, unit, slice, part;
275 dev_t newrootdev, dev;
279 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
280 printf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
283 majdev = B_TYPE(bootdev);
284 dev = makebdev(majdev, 0);
285 if (devsw(dev) == NULL)
287 unit = B_UNIT(bootdev);
288 slice = B_SLICE(bootdev);
289 if (slice == WHOLE_DISK_SLICE)
290 slice = COMPATIBILITY_SLICE;
291 if (slice < 0 || slice >= MAX_SLICES) {
292 printf("bad slice\n");
297 * XXX kludge for inconsistent unit numbering and lack of slice
298 * support for floppies.
300 if (majdev == FDMAJOR) {
301 slice = COMPATIBILITY_SLICE;
303 mindev = unit << FDUNITSHIFT;
305 part = B_PARTITION(bootdev);
306 mindev = dkmakeminor(unit, slice, part);
309 newrootdev = makebdev(majdev, mindev);
310 sname = dsname(newrootdev, unit, slice, part, partname);
311 rootdevnames[0] = malloc(strlen(sname) + 6, M_DEVBUF, M_NOWAIT);
312 sprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
315 * For properly dangerously dedicated disks (ones with a historical
316 * bogus partition table), the boot blocks will give slice = 4, but
317 * the kernel will only provide the compatibility slice since it
318 * knows that slice 4 is not a real slice. Arrange to try mounting
319 * the compatibility slice as root if mounting the slice passed by
320 * the boot blocks fails. This handles the dangerously dedicated
321 * case and perhaps others.
323 if (slice == COMPATIBILITY_SLICE)
325 slice = COMPATIBILITY_SLICE;
326 sname = dsname(newrootdev, unit, slice, part, partname);
327 rootdevnames[1] = malloc(strlen(sname) + 6, M_DEVBUF, M_NOWAIT);
328 sprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
332 #if defined(NFS) && defined(NFS_ROOT)
334 #include <sys/socket.h>
336 #include <net/if_dl.h>
337 #include <net/if_types.h>
338 #include <net/if_var.h>
339 #include <net/ethernet.h>
340 #include <netinet/in.h>
341 #include <nfs/rpcv2.h>
342 #include <nfs/nfsproto.h>
344 #include <nfs/nfsdiskless.h>
346 extern struct nfs_diskless nfs_diskless;
349 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
354 bzero(sa, sizeof(*sa));
355 sa->sin_len = sizeof(*sa);
356 sa->sin_family = AF_INET;
358 if ((cp = getenv(ev)) == NULL)
360 if (sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
362 /* XXX is this ordering correct? */
363 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
368 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
373 bzero(sa, sizeof(*sa));
374 sa->sdl_len = sizeof(*sa);
375 sa->sdl_family = AF_LINK;
376 sa->sdl_type = IFT_ETHER;
377 sa->sdl_alen = ETHER_ADDR_LEN;
378 if ((cp = getenv(ev)) == NULL)
380 if (sscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
382 sa->sdl_data[0] = a[0];
383 sa->sdl_data[1] = a[1];
384 sa->sdl_data[2] = a[2];
385 sa->sdl_data[3] = a[3];
386 sa->sdl_data[4] = a[4];
387 sa->sdl_data[5] = a[5];
392 decode_nfshandle(char *ev, u_char *fh)
397 if (((cp = getenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
404 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff))
415 * Populate the essential fields in the nfsv3_diskless structure.
417 * The loader is expected to export the following environment variables:
419 * boot.netif.ip IP address on boot interface
420 * boot.netif.netmask netmask on boot interface
421 * boot.netif.gateway default gateway (optional)
422 * boot.netif.hwaddr hardware address of boot interface
423 * boot.nfsroot.server IP address of root filesystem server
424 * boot.nfsroot.path path of the root filesystem on server
425 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
428 pxe_setup_nfsdiskless()
430 struct nfs_diskless *nd = &nfs_diskless;
433 struct sockaddr_dl *sdl, ourdl;
434 struct sockaddr_in myaddr, netmask;
437 /* set up interface */
438 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
440 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
441 printf("PXE: no netmask\n");
444 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
445 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
446 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
447 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
448 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
450 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
451 printf("PXE: no hardware address\n");
455 ifp = TAILQ_FIRST(&ifnet);
456 TAILQ_FOREACH(ifp, &ifnet, if_link) {
457 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
458 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
459 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
460 if ((sdl->sdl_type == ourdl.sdl_type) &&
461 (sdl->sdl_alen == ourdl.sdl_alen) &&
462 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
463 ourdl.sdl_data + ourdl.sdl_nlen,
469 printf("PXE: no interface\n");
470 return; /* no matching interface */
472 sprintf(nd->myif.ifra_name, "%s%d", ifp->if_name, ifp->if_unit);
476 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
478 /* XXX set up swap? */
480 /* set up root mount */
481 nd->root_args.rsize = 8192; /* XXX tunable? */
482 nd->root_args.wsize = 8192;
483 nd->root_args.sotype = SOCK_DGRAM;
484 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
485 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
486 printf("PXE: no server\n");
489 nd->root_saddr.sin_port = htons(NFS_PORT);
490 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
491 printf("PXE: no NFS handle\n");
494 if ((cp = getenv("boot.nfsroot.path")) != NULL)
495 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
497 nfs_diskless_valid = 1;