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/vkernel/i386/autoconf.c,v 1.9 2007/05/01 00:05:18 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>
65 #include <sys/disklabel.h>
66 #include <sys/diskslice.h>
67 #include <sys/reboot.h>
68 #include <sys/kernel.h>
69 #include <sys/malloc.h>
70 #include <sys/mount.h>
72 #include <sys/thread.h>
73 #include <sys/device.h>
74 #include <sys/machintr.h>
77 #include <vm/vm_kern.h>
78 #include <vm/vm_extern.h>
79 #include <vm/vm_pager.h>
82 #include <machine/pcb.h>
83 #include <machine/pcb_ext.h>
84 #include <machine/vm86.h>
86 #include <machine/globaldata.h>
87 #include <machine/md_var.h>
90 #include <bus/isa/isavar.h>
92 device_t isa_bus_device = 0;
95 static void cpu_startup (void *);
96 static void configure_first (void *);
97 static void configure (void *);
98 static void configure_final (void *);
100 #if defined(FFS) && defined(FFS_ROOT)
101 static void setroot (void);
104 #if defined(NFS) && defined(NFS_ROOT)
105 #if !defined(BOOTP_NFSROOT)
106 static void pxe_setup_nfsdiskless(void);
110 SYSINIT(cpu, SI_BOOT2_SMP, SI_ORDER_FIRST, cpu_startup, NULL);
111 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
112 /* SI_ORDER_SECOND is hookable */
113 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
114 /* SI_ORDER_MIDDLE is hookable */
115 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
117 cdev_t rootdev = NOCDEV;
118 cdev_t dumpdev = NOCDEV;
124 cpu_startup(void *dummy)
126 vm_offset_t buffer_sva;
127 vm_offset_t buffer_eva;
128 vm_offset_t pager_sva;
129 vm_offset_t pager_eva;
133 kprintf("%s", version);
134 kprintf("real memory = %llu (%lluK bytes)\n",
135 ptoa(Maxmem), ptoa(Maxmem) / 1024);
138 int factor = 4 * BKVASIZE / 1024;
139 int kbytes = Maxmem * (PAGE_SIZE / 1024);
143 nbuf += min((kbytes - 4096) / factor, 65536 / factor);
145 nbuf += (kbytes - 65536) * 2 / (factor * 5);
146 if (maxbcache && nbuf > maxbcache / BKVASIZE)
147 nbuf = maxbcache / BKVASIZE;
149 if (nbuf > (virtual_end - virtual_start) / (BKVASIZE * 2)) {
150 nbuf = (virtual_end - virtual_start) / (BKVASIZE * 2);
151 kprintf("Warning: nbufs capped at %d\n", nbuf);
154 nswbuf = max(min(nbuf/4, 256), 16);
156 if (nswbuf < NSWBUF_MIN)
161 * Allocate memory for the buffer cache
163 buf = (void *)kmem_alloc(&kernel_map, nbuf * sizeof(struct buf));
164 swbuf = (void *)kmem_alloc(&kernel_map, nswbuf * sizeof(struct buf));
170 kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
171 (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size);
172 kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
174 buffer_map.system_map = 1;
175 kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
176 (nswbuf*MAXPHYS) + pager_map_size);
177 pager_map.system_map = 1;
178 kmem_suballoc(&kernel_map, &exec_map, &minaddr, &maxaddr,
179 (16*(ARG_MAX+(PAGE_SIZE*3))));
180 #if defined(USERCONFIG)
182 cninit(); /* the preferred console may have changed */
184 kprintf("avail memory = %u (%uK bytes)\n", ptoa(vmstats.v_free_count),
185 ptoa(vmstats.v_free_count) / 1024);
187 vm_pager_bufferinit();
196 * Determine i/o configuration for a machine.
199 configure_first(void *dummy)
204 configure(void *dummy)
207 * Final interrupt support acviation, then enable hardware interrupts.
209 MachIntrABI.finalize();
213 * This will configure all devices, generally starting with the
214 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly
215 * dummies up the attach in order to delay legacy initialization
216 * until after all other busses/subsystems have had a chance
217 * at those resources.
219 root_bus_configure();
223 * Explicitly probe and attach ISA last. The isa bus saves
224 * it's device node at attach time for us here.
227 isa_probe_children(isa_bus_device);
231 * Allow lowering of the ipl to the lowest kernel level if we
232 * panic (or call tsleep() before clearing `cold'). No level is
233 * completely safe (since a panic may occur in a critical region
234 * at splhigh()), but we want at least bio interrupts to work.
236 safepri = TDPRI_KERN_USER;
240 configure_final(void *dummy)
245 kprintf("Device configuration finished.\n");
249 void bootpc_init(void);
252 * Do legacy root filesystem discovery.
260 #if defined(NFS) && defined(NFS_ROOT)
261 #if !defined(BOOTP_NFSROOT)
262 pxe_setup_nfsdiskless();
263 if (nfs_diskless_valid)
265 rootdevnames[0] = "nfs:";
267 #if defined(FFS) && defined(FFS_ROOT)
268 if (!rootdevnames[0])
272 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
274 u_long bootdev = 0; /* not a cdev_t - encoding is different */
276 #if defined(FFS) && defined(FFS_ROOT)
279 * The boot code uses old block device major numbers to pass bootdev to
280 * us. We have to translate these to character device majors because
281 * we don't have block devices any more.
284 boot_translate_majdev(int bmajor)
286 static int conv[] = { BOOTMAJOR_CONVARY };
288 if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
289 return(conv[bmajor]);
294 * Attempt to find the device from which we were booted.
295 * If we can do so, and not instructed not to do so,
296 * set rootdevs[] and rootdevnames[] to correspond to the
299 * This code survives in order to allow the system to be
300 * booted from legacy environments that do not correctly
301 * populate the kernel environment. There are significant
302 * restrictions on the bootability of the system in this
303 * situation; it can only be mounting root from a 'da'
304 * 'wd' or 'fd' device, and the root filesystem must be ufs.
309 int majdev, mindev, unit, slice, part;
310 cdev_t newrootdev, dev;
314 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
315 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
318 majdev = boot_translate_majdev(B_TYPE(bootdev));
320 kprintf("bootdev: %08lx type=%ld unit=%ld "
321 "slice=%ld part=%ld major=%d\n",
322 bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
323 B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
325 dev = udev2dev(makeudev(majdev, 0), 0);
326 if (!dev_is_good(dev))
328 unit = B_UNIT(bootdev);
329 slice = B_SLICE(bootdev);
330 if (slice == WHOLE_DISK_SLICE)
331 slice = COMPATIBILITY_SLICE;
332 if (slice < 0 || slice >= MAX_SLICES) {
333 kprintf("bad slice\n");
337 part = B_PARTITION(bootdev);
338 mindev = dkmakeminor(unit, slice, part);
339 newrootdev = udev2dev(makeudev(majdev, mindev), 0);
340 if (!dev_is_good(newrootdev))
342 sname = dsname(newrootdev, unit, slice, part, partname);
343 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
344 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
347 * For properly dangerously dedicated disks (ones with a historical
348 * bogus partition table), the boot blocks will give slice = 4, but
349 * the kernel will only provide the compatibility slice since it
350 * knows that slice 4 is not a real slice. Arrange to try mounting
351 * the compatibility slice as root if mounting the slice passed by
352 * the boot blocks fails. This handles the dangerously dedicated
353 * case and perhaps others.
355 if (slice == COMPATIBILITY_SLICE)
357 slice = COMPATIBILITY_SLICE;
358 sname = dsname(newrootdev, unit, slice, part, partname);
359 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
360 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
364 #if defined(NFS) && defined(NFS_ROOT)
365 #if !defined(BOOTP_NFSROOT)
367 #include <sys/socket.h>
369 #include <net/if_dl.h>
370 #include <net/if_types.h>
371 #include <net/if_var.h>
372 #include <net/ethernet.h>
373 #include <netinet/in.h>
374 #include <vfs/nfs/rpcv2.h>
375 #include <vfs/nfs/nfsproto.h>
376 #include <vfs/nfs/nfs.h>
377 #include <vfs/nfs/nfsdiskless.h>
379 extern struct nfs_diskless nfs_diskless;
382 * Convert a kenv variable to a sockaddr. If the kenv variable does not
383 * exist the sockaddr will remain zerod out (callers typically just check
384 * sin_len). A network address of 0.0.0.0 is equivalent to failure.
387 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
392 bzero(sa, sizeof(*sa));
394 if ((cp = kgetenv(ev)) == NULL)
396 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
398 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
400 /* XXX is this ordering correct? */
401 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
402 sa->sin_len = sizeof(*sa);
403 sa->sin_family = AF_INET;
408 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
413 bzero(sa, sizeof(*sa));
414 sa->sdl_len = sizeof(*sa);
415 sa->sdl_family = AF_LINK;
416 sa->sdl_type = IFT_ETHER;
417 sa->sdl_alen = ETHER_ADDR_LEN;
418 if ((cp = kgetenv(ev)) == NULL)
420 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
422 sa->sdl_data[0] = a[0];
423 sa->sdl_data[1] = a[1];
424 sa->sdl_data[2] = a[2];
425 sa->sdl_data[3] = a[3];
426 sa->sdl_data[4] = a[4];
427 sa->sdl_data[5] = a[5];
432 decode_nfshandle(char *ev, u_char *fh)
437 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
444 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
455 * Populate the essential fields in the nfsv3_diskless structure.
457 * The loader is expected to export the following environment variables:
459 * boot.netif.ip IP address on boot interface
460 * boot.netif.netmask netmask on boot interface
461 * boot.netif.gateway default gateway (optional)
462 * boot.netif.hwaddr hardware address of boot interface
463 * boot.nfsroot.server IP address of root filesystem server
464 * boot.nfsroot.path path of the root filesystem on server
465 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
468 pxe_setup_nfsdiskless(void)
470 struct nfs_diskless *nd = &nfs_diskless;
473 struct sockaddr_dl *sdl, ourdl;
474 struct sockaddr_in myaddr, netmask;
477 /* set up interface */
478 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
480 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
481 kprintf("PXE: no netmask\n");
484 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
485 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
486 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
487 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
488 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
490 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
491 kprintf("PXE: no hardware address\n");
495 ifp = TAILQ_FIRST(&ifnet);
496 TAILQ_FOREACH(ifp, &ifnet, if_link) {
497 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
498 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
499 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
500 if ((sdl->sdl_type == ourdl.sdl_type) &&
501 (sdl->sdl_alen == ourdl.sdl_alen) &&
502 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
503 ourdl.sdl_data + ourdl.sdl_nlen,
509 kprintf("PXE: no interface\n");
510 return; /* no matching interface */
512 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
515 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
517 /* XXX set up swap? */
519 /* set up root mount */
520 nd->root_args.rsize = 8192; /* XXX tunable? */
521 nd->root_args.wsize = 8192;
522 nd->root_args.sotype = SOCK_DGRAM;
523 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
524 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
525 kprintf("PXE: no server\n");
528 nd->root_saddr.sin_port = htons(NFS_PORT);
531 * A tftp-only loader may pass NFS path information without a
532 * root handle. Generate a warning but continue configuring.
534 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
535 kprintf("PXE: Warning, no NFS handle passed from loader\n");
537 if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
538 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
540 nfs_diskless_valid = 1;