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
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
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/platform/pc32/i386/autoconf.c,v 1.32 2006/12/13 21:58:52 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>
61 #include <sys/bootmaj.h>
64 #include <sys/disklabel.h>
65 #include <sys/diskslice.h>
66 #include <sys/reboot.h>
67 #include <sys/kernel.h>
68 #include <sys/malloc.h>
69 #include <sys/mount.h>
71 #include <sys/thread.h>
72 #include <sys/device.h>
73 #include <sys/machintr.h>
75 #include <machine/bootinfo.h>
76 #include <machine/md_var.h>
77 #include <machine/smp.h>
78 #include <machine_base/icu/icu.h>
80 #include <machine/pcb.h>
81 #include <machine/pcb_ext.h>
82 #include <machine/vm86.h>
83 #include <machine/globaldata.h>
86 #include <bus/isa/isavar.h>
88 device_t isa_bus_device = 0;
91 static void configure_first (void *);
92 static void configure (void *);
93 static void configure_final (void *);
95 #if defined(FFS) && defined(FFS_ROOT)
96 static void setroot (void);
99 #if defined(NFS) && defined(NFS_ROOT)
100 #if !defined(BOOTP_NFSROOT)
101 static void pxe_setup_nfsdiskless(void);
105 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
106 /* SI_ORDER_SECOND is hookable */
107 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
108 /* SI_ORDER_MIDDLE is hookable */
109 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
111 cdev_t rootdev = NOCDEV;
112 cdev_t dumpdev = NOCDEV;
115 * Determine i/o configuration for a machine.
118 configure_first(void *dummy)
123 configure(void *dummy)
126 * Final interrupt support acviation, then enable hardware interrupts.
128 MachIntrABI.finalize();
132 * This will configure all devices, generally starting with the
133 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly
134 * dummies up the attach in order to delay legacy initialization
135 * until after all other busses/subsystems have had a chance
136 * at those resources.
138 root_bus_configure();
142 * Explicitly probe and attach ISA last. The isa bus saves
143 * it's device node at attach time for us here.
146 isa_probe_children(isa_bus_device);
150 * Allow lowering of the ipl to the lowest kernel level if we
151 * panic (or call tsleep() before clearing `cold'). No level is
152 * completely safe (since a panic may occur in a critical region
153 * at splhigh()), but we want at least bio interrupts to work.
155 safepri = TDPRI_KERN_USER;
159 configure_final(void *dummy)
171 * Print out the BIOS's idea of the disk geometries.
173 printf("BIOS Geometries:\n");
174 for (i = 0; i < N_BIOS_GEOM; i++) {
175 unsigned long bios_geom;
176 int max_cylinder, max_head, max_sector;
178 bios_geom = bootinfo.bi_bios_geom[i];
181 * XXX the bootstrap punts a 1200K floppy geometry
182 * when the get-disk-geometry interrupt fails. Skip
183 * drives that have this geometry.
185 if (bios_geom == 0x4f010f)
188 printf(" %x:%08lx ", i, bios_geom);
189 max_cylinder = bios_geom >> 16;
190 max_head = (bios_geom >> 8) & 0xff;
191 max_sector = bios_geom & 0xff;
193 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
194 max_cylinder, max_cylinder + 1,
195 max_head, max_head + 1,
196 max_sector, max_sector);
198 printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
200 printf("Device configuration finished.\n");
206 void bootpc_init(void);
209 * Do legacy root filesystem discovery.
217 #if defined(NFS) && defined(NFS_ROOT)
218 #if !defined(BOOTP_NFSROOT)
219 pxe_setup_nfsdiskless();
220 if (nfs_diskless_valid)
222 rootdevnames[0] = "nfs:";
224 #if defined(FFS) && defined(FFS_ROOT)
225 if (!rootdevnames[0])
229 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
231 u_long bootdev = 0; /* not a cdev_t - encoding is different */
233 #if defined(FFS) && defined(FFS_ROOT)
235 #define FDUNITSHIFT 6
238 * The boot code uses old block device major numbers to pass bootdev to
239 * us. We have to translate these to character device majors because
240 * we don't have block devices any more.
243 boot_translate_majdev(int bmajor)
245 static int conv[] = { BOOTMAJOR_CONVARY };
247 if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
248 return(conv[bmajor]);
253 * Attempt to find the device from which we were booted.
254 * If we can do so, and not instructed not to do so,
255 * set rootdevs[] and rootdevnames[] to correspond to the
258 * This code survives in order to allow the system to be
259 * booted from legacy environments that do not correctly
260 * populate the kernel environment. There are significant
261 * restrictions on the bootability of the system in this
262 * situation; it can only be mounting root from a 'da'
263 * 'wd' or 'fd' device, and the root filesystem must be ufs.
268 int majdev, mindev, unit, slice, part;
269 cdev_t newrootdev, dev;
273 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
274 printf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
277 majdev = boot_translate_majdev(B_TYPE(bootdev));
279 printf("bootdev: %08lx type=%ld unit=%ld "
280 "slice=%ld part=%ld major=%d\n",
281 bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
282 B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
284 dev = udev2dev(makeudev(majdev, 0), 0);
285 if (!dev_is_good(dev))
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 == FD_CDEV_MAJOR) {
301 slice = COMPATIBILITY_SLICE;
303 mindev = unit << FDUNITSHIFT;
305 part = B_PARTITION(bootdev);
306 mindev = dkmakeminor(unit, slice, part);
308 newrootdev = udev2dev(makeudev(majdev, mindev), 0);
309 if (!dev_is_good(newrootdev))
311 sname = dsname(newrootdev, unit, slice, part, partname);
312 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
313 sprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
316 * For properly dangerously dedicated disks (ones with a historical
317 * bogus partition table), the boot blocks will give slice = 4, but
318 * the kernel will only provide the compatibility slice since it
319 * knows that slice 4 is not a real slice. Arrange to try mounting
320 * the compatibility slice as root if mounting the slice passed by
321 * the boot blocks fails. This handles the dangerously dedicated
322 * case and perhaps others.
324 if (slice == COMPATIBILITY_SLICE)
326 slice = COMPATIBILITY_SLICE;
327 sname = dsname(newrootdev, unit, slice, part, partname);
328 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
329 sprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
333 #if defined(NFS) && defined(NFS_ROOT)
334 #if !defined(BOOTP_NFSROOT)
336 #include <sys/socket.h>
338 #include <net/if_dl.h>
339 #include <net/if_types.h>
340 #include <net/if_var.h>
341 #include <net/ethernet.h>
342 #include <netinet/in.h>
343 #include <vfs/nfs/rpcv2.h>
344 #include <vfs/nfs/nfsproto.h>
345 #include <vfs/nfs/nfs.h>
346 #include <vfs/nfs/nfsdiskless.h>
348 extern struct nfs_diskless nfs_diskless;
351 * Convert a kenv variable to a sockaddr. If the kenv variable does not
352 * exist the sockaddr will remain zerod out (callers typically just check
353 * sin_len). A network address of 0.0.0.0 is equivalent to failure.
356 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
361 bzero(sa, sizeof(*sa));
363 if ((cp = kgetenv(ev)) == NULL)
365 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
367 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
369 /* XXX is this ordering correct? */
370 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
371 sa->sin_len = sizeof(*sa);
372 sa->sin_family = AF_INET;
377 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
382 bzero(sa, sizeof(*sa));
383 sa->sdl_len = sizeof(*sa);
384 sa->sdl_family = AF_LINK;
385 sa->sdl_type = IFT_ETHER;
386 sa->sdl_alen = ETHER_ADDR_LEN;
387 if ((cp = kgetenv(ev)) == NULL)
389 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
391 sa->sdl_data[0] = a[0];
392 sa->sdl_data[1] = a[1];
393 sa->sdl_data[2] = a[2];
394 sa->sdl_data[3] = a[3];
395 sa->sdl_data[4] = a[4];
396 sa->sdl_data[5] = a[5];
401 decode_nfshandle(char *ev, u_char *fh)
406 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
413 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
424 * Populate the essential fields in the nfsv3_diskless structure.
426 * The loader is expected to export the following environment variables:
428 * boot.netif.ip IP address on boot interface
429 * boot.netif.netmask netmask on boot interface
430 * boot.netif.gateway default gateway (optional)
431 * boot.netif.hwaddr hardware address of boot interface
432 * boot.nfsroot.server IP address of root filesystem server
433 * boot.nfsroot.path path of the root filesystem on server
434 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
437 pxe_setup_nfsdiskless(void)
439 struct nfs_diskless *nd = &nfs_diskless;
442 struct sockaddr_dl *sdl, ourdl;
443 struct sockaddr_in myaddr, netmask;
446 /* set up interface */
447 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
449 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
450 printf("PXE: no netmask\n");
453 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
454 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
455 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
456 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
457 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
459 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
460 printf("PXE: no hardware address\n");
464 ifp = TAILQ_FIRST(&ifnet);
465 TAILQ_FOREACH(ifp, &ifnet, if_link) {
466 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
467 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
468 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
469 if ((sdl->sdl_type == ourdl.sdl_type) &&
470 (sdl->sdl_alen == ourdl.sdl_alen) &&
471 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
472 ourdl.sdl_data + ourdl.sdl_nlen,
478 printf("PXE: no interface\n");
479 return; /* no matching interface */
481 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
484 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
486 /* XXX set up swap? */
488 /* set up root mount */
489 nd->root_args.rsize = 8192; /* XXX tunable? */
490 nd->root_args.wsize = 8192;
491 nd->root_args.sotype = SOCK_DGRAM;
492 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
493 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
494 printf("PXE: no server\n");
497 nd->root_saddr.sin_port = htons(NFS_PORT);
500 * A tftp-only loader may pass NFS path information without a
501 * root handle. Generate a warning but continue configuring.
503 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
504 printf("PXE: Warning, no NFS handle passed from loader\n");
506 if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
507 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
509 nfs_diskless_valid = 1;