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
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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 $
41 * Setup the system to run on the current machine.
43 * Configure() is called at boot time and initializes the vba
44 * device tables and the memory controller monitoring. Available
45 * devices are determined (from possibilities mentioned in ioconf.c),
46 * and the drivers are initialized.
48 #include "opt_bootp.h"
50 #include "opt_cd9660.h"
52 #include "opt_nfsroot.h"
53 #include "opt_rootdevname.h"
57 #include <sys/param.h>
58 #include <sys/systm.h>
59 #include <sys/bootmaj.h>
62 #include <sys/diskslice.h>
63 #include <sys/reboot.h>
64 #include <sys/kernel.h>
65 #include <sys/malloc.h>
66 #include <sys/mount.h>
68 #include <sys/thread.h>
69 #include <sys/device.h>
70 #include <sys/machintr.h>
72 #include <machine/bootinfo.h>
73 #include <machine/md_var.h>
74 #include <machine/smp.h>
75 #include <machine_base/icu/icu.h>
77 #include <machine/pcb.h>
78 #include <machine/pcb_ext.h>
79 #include <machine/vm86.h>
80 #include <machine/globaldata.h>
83 #include <bus/isa/isavar.h>
85 device_t isa_bus_device = NULL;
88 static void configure_first (void *);
89 static void configure (void *);
90 static void configure_final (void *);
92 #if defined(FFS) && defined(FFS_ROOT)
93 static void setroot (void);
96 #if defined(NFS) && defined(NFS_ROOT)
97 #if !defined(BOOTP_NFSROOT)
98 static void pxe_setup_nfsdiskless(void);
102 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
103 /* SI_ORDER_SECOND is hookable */
104 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
105 /* SI_ORDER_MIDDLE is hookable */
106 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
108 cdev_t rootdev = NULL;
109 cdev_t dumpdev = NULL;
112 * Determine i/o configuration for a machine.
115 configure_first(void *dummy)
120 configure(void *dummy)
123 * This will configure all devices, generally starting with the
124 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly
125 * dummies up the attach in order to delay legacy initialization
126 * until after all other busses/subsystems have had a chance
127 * at those resources.
129 root_bus_configure();
133 * Explicitly probe and attach ISA last. The isa bus saves
134 * it's device node at attach time for us here.
137 isa_probe_children(isa_bus_device);
141 * Allow lowering of the ipl to the lowest kernel level if we
142 * panic (or call tsleep() before clearing `cold'). No level is
143 * completely safe (since a panic may occur in a critical region
144 * at splhigh()), but we want at least bio interrupts to work.
146 safepri = TDPRI_KERN_USER;
150 configure_final(void *dummy)
158 * Print out the BIOS's idea of the disk geometries.
160 kprintf("BIOS Geometries:\n");
161 for (i = 0; i < N_BIOS_GEOM; i++) {
162 unsigned long bios_geom;
163 int max_cylinder, max_head, max_sector;
165 bios_geom = bootinfo.bi_bios_geom[i];
168 * XXX the bootstrap punts a 1200K floppy geometry
169 * when the get-disk-geometry interrupt fails. Skip
170 * drives that have this geometry.
172 if (bios_geom == 0x4f010f)
175 kprintf(" %x:%08lx ", i, bios_geom);
176 max_cylinder = bios_geom >> 16;
177 max_head = (bios_geom >> 8) & 0xff;
178 max_sector = bios_geom & 0xff;
180 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
181 max_cylinder, max_cylinder + 1,
182 max_head, max_head + 1,
183 max_sector, max_sector);
185 kprintf(" %d accounted for\n", bootinfo.bi_n_bios_used);
187 kprintf("Device configuration finished.\n");
192 void bootpc_init(void);
195 * Do legacy root filesystem discovery.
203 #if defined(NFS) && defined(NFS_ROOT)
204 #if !defined(BOOTP_NFSROOT)
205 pxe_setup_nfsdiskless();
206 if (nfs_diskless_valid)
208 rootdevnames[0] = "nfs:";
210 #if defined(FFS) && defined(FFS_ROOT)
211 if (!rootdevnames[0])
215 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
217 u_long bootdev = 0; /* not a cdev_t - encoding is different */
219 #if defined(FFS) && defined(FFS_ROOT)
221 #define FDUNITSHIFT 6
224 * The boot code uses old block device major numbers to pass bootdev to
225 * us. We have to translate these to character device majors because
226 * we don't have block devices any more.
229 boot_translate_majdev(int bmajor)
231 static int conv[] = { BOOTMAJOR_CONVARY };
233 if (bmajor >= 0 && bmajor < NELEM(conv))
234 return(conv[bmajor]);
239 * Attempt to find the device from which we were booted.
240 * If we can do so, and not instructed not to do so,
241 * set rootdevs[] and rootdevnames[] to correspond to the
244 * This code survives in order to allow the system to be
245 * booted from legacy environments that do not correctly
246 * populate the kernel environment. There are significant
247 * restrictions on the bootability of the system in this
248 * situation; it can only be mounting root from a 'da'
249 * 'wd' or 'fd' device, and the root filesystem must be ufs.
254 int majdev, mindev, unit, slice, part;
255 cdev_t newrootdev, dev;
259 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
260 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
263 majdev = boot_translate_majdev(B_TYPE(bootdev));
265 kprintf("bootdev: %08lx type=%ld unit=%ld "
266 "slice=%ld part=%ld major=%d\n",
267 bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
268 B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
270 dev = udev2dev(makeudev(majdev, 0), 0);
271 if (!dev_is_good(dev))
273 unit = B_UNIT(bootdev);
274 slice = B_SLICE(bootdev);
275 if (slice == WHOLE_DISK_SLICE)
276 slice = COMPATIBILITY_SLICE;
277 if (slice < 0 || slice >= MAX_SLICES) {
278 kprintf("bad slice\n");
282 part = B_PARTITION(bootdev);
283 mindev = dkmakeminor(unit, slice, part);
284 newrootdev = udev2dev(makeudev(majdev, mindev), 0);
285 if (!dev_is_good(newrootdev))
287 sname = dsname(newrootdev, unit, slice, part, partname);
288 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
289 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
292 * For properly dangerously dedicated disks (ones with a historical
293 * bogus partition table), the boot blocks will give slice = 4, but
294 * the kernel will only provide the compatibility slice since it
295 * knows that slice 4 is not a real slice. Arrange to try mounting
296 * the compatibility slice as root if mounting the slice passed by
297 * the boot blocks fails. This handles the dangerously dedicated
298 * case and perhaps others.
300 if (slice == COMPATIBILITY_SLICE)
302 slice = COMPATIBILITY_SLICE;
303 sname = dsname(newrootdev, unit, slice, part, partname);
304 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
305 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
309 #if defined(NFS) && defined(NFS_ROOT)
310 #if !defined(BOOTP_NFSROOT)
312 #include <sys/socket.h>
314 #include <net/if_dl.h>
315 #include <net/if_types.h>
316 #include <net/if_var.h>
317 #include <net/ethernet.h>
318 #include <netinet/in.h>
319 #include <vfs/nfs/rpcv2.h>
320 #include <vfs/nfs/nfsproto.h>
321 #include <vfs/nfs/nfs.h>
322 #include <vfs/nfs/nfsdiskless.h>
324 extern struct nfs_diskless nfs_diskless;
327 * Convert a kenv variable to a sockaddr. If the kenv variable does not
328 * exist the sockaddr will remain zerod out (callers typically just check
329 * sin_len). A network address of 0.0.0.0 is equivalent to failure.
332 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
337 bzero(sa, sizeof(*sa));
339 if ((cp = kgetenv(ev)) == NULL)
341 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
343 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
345 /* XXX is this ordering correct? */
346 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
347 sa->sin_len = sizeof(*sa);
348 sa->sin_family = AF_INET;
353 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
358 bzero(sa, sizeof(*sa));
359 sa->sdl_len = sizeof(*sa);
360 sa->sdl_family = AF_LINK;
361 sa->sdl_type = IFT_ETHER;
362 sa->sdl_alen = ETHER_ADDR_LEN;
363 if ((cp = kgetenv(ev)) == NULL)
365 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
367 sa->sdl_data[0] = a[0];
368 sa->sdl_data[1] = a[1];
369 sa->sdl_data[2] = a[2];
370 sa->sdl_data[3] = a[3];
371 sa->sdl_data[4] = a[4];
372 sa->sdl_data[5] = a[5];
377 decode_nfshandle(char *ev, u_char *fh)
382 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
389 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
400 * Populate the essential fields in the nfsv3_diskless structure.
402 * The loader is expected to export the following environment variables:
404 * boot.netif.ip IP address on boot interface
405 * boot.netif.netmask netmask on boot interface
406 * boot.netif.gateway default gateway (optional)
407 * boot.netif.hwaddr hardware address of boot interface
408 * boot.nfsroot.server IP address of root filesystem server
409 * boot.nfsroot.path path of the root filesystem on server
410 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
413 pxe_setup_nfsdiskless(void)
415 struct nfs_diskless *nd = &nfs_diskless;
417 struct sockaddr_dl *sdl, ourdl;
418 struct sockaddr_in myaddr, netmask;
421 /* set up interface */
422 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
424 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
425 kprintf("PXE: no netmask\n");
428 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
429 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
430 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
431 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
432 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
434 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
435 kprintf("PXE: no hardware address\n");
438 TAILQ_FOREACH(ifp, &ifnet, if_link) {
439 struct ifaddr_container *ifac;
441 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
442 struct ifaddr *ifa = ifac->ifa;
444 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
445 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
446 if ((sdl->sdl_type == ourdl.sdl_type) &&
447 (sdl->sdl_alen == ourdl.sdl_alen) &&
448 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
449 ourdl.sdl_data + ourdl.sdl_nlen,
455 kprintf("PXE: no interface\n");
456 return; /* no matching interface */
458 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
461 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
463 /* XXX set up swap? */
465 /* set up root mount */
466 nd->root_args.rsize = 8192; /* XXX tunable? */
467 nd->root_args.wsize = 8192;
468 nd->root_args.sotype = SOCK_STREAM;
469 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT;
470 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
471 kprintf("PXE: no server\n");
474 nd->root_saddr.sin_port = htons(NFS_PORT);
477 * A tftp-only loader may pass NFS path information without a
478 * root handle. Generate a warning but continue configuring.
480 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
481 kprintf("PXE: Warning, no NFS handle passed from loader\n");
483 if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
484 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
486 nfs_diskless_valid = 1;