2 * Copyright (c) 1990 The Regents of the University of California.
3 * Copyright (c) 2008 The DragonFly Project.
6 * This code is derived from software contributed to Berkeley by
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91
34 * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $
38 * Setup the system to run on the current machine.
40 * Configure() is called at boot time and initializes the vba
41 * device tables and the memory controller monitoring. Available
42 * devices are determined (from possibilities mentioned in ioconf.c),
43 * and the drivers are initialized.
45 #include "opt_bootp.h"
47 #include "opt_cd9660.h"
49 #include "opt_nfsroot.h"
50 #include "opt_rootdevname.h"
54 #include <sys/param.h>
55 #include <sys/systm.h>
56 #include <sys/bootmaj.h>
60 #include <sys/diskslice.h>
61 #include <sys/reboot.h>
62 #include <sys/kernel.h>
63 #include <sys/malloc.h>
64 #include <sys/mount.h>
66 #include <sys/thread.h>
67 #include <sys/device.h>
68 #include <sys/machintr.h>
70 #include <vm/vm_kern.h>
71 #include <vm/vm_extern.h>
72 #include <vm/vm_pager.h>
75 #include <machine/pcb.h>
76 #include <machine/pcb_ext.h>
78 #include <machine/smp.h>
79 #include <machine/globaldata.h>
80 #include <machine/md_var.h>
83 #include <bus/isa/isavar.h>
85 device_t isa_bus_device = NULL;
88 static void cpu_startup (void *);
89 static void configure_first (void *);
90 static void configure (void *);
91 static void configure_final (void *);
93 #if defined(FFS) && defined(FFS_ROOT)
94 static void setroot (void);
97 #if defined(NFS) && defined(NFS_ROOT)
98 #if !defined(BOOTP_NFSROOT)
99 static void pxe_setup_nfsdiskless(void);
103 SYSINIT(cpu, SI_BOOT2_START_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
104 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
105 /* SI_ORDER_SECOND is hookable */
106 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
107 /* SI_ORDER_MIDDLE is hookable */
108 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
110 cdev_t rootdev = NULL;
111 cdev_t dumpdev = NULL;
114 * nfsroot.iosize may be set in loader.conf, 32768 is recommended to
115 * be able to max-out a GigE link if the server supports it. Many servers
116 * do not so the default is 8192.
118 * nfsroot.rahead defaults to something reasonable, can be overridden.
120 static int nfsroot_iosize = 8192;
121 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize);
122 static int nfsroot_rahead = 4;
123 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead);
129 cpu_startup(void *dummy)
131 vm_offset_t buffer_sva;
132 vm_offset_t buffer_eva;
133 vm_offset_t pager_sva;
134 vm_offset_t pager_eva;
136 kprintf("%s", version);
137 kprintf("real memory = %ju (%juK bytes)\n",
138 (uintmax_t)ptoa(Maxmem), (uintmax_t)(ptoa(Maxmem) / 1024));
141 int factor = 4 * BKVASIZE / 1024;
142 int kbytes = Maxmem * (PAGE_SIZE / 1024);
146 nbuf += min((kbytes - 4096) / factor, 65536 / factor);
148 nbuf += (kbytes - 65536) * 2 / (factor * 5);
149 if (maxbcache && nbuf > maxbcache / BKVASIZE)
150 nbuf = maxbcache / BKVASIZE;
152 if (nbuf > (virtual_end - virtual_start) / (BKVASIZE * 2)) {
153 nbuf = (virtual_end - virtual_start) / (BKVASIZE * 2);
154 kprintf("Warning: nbufs capped at %ld\n", nbuf);
157 nswbuf = lmax(lmin(nbuf / 4, 256), 16);
159 if (nswbuf < NSWBUF_MIN)
164 * Allocate memory for the buffer cache
166 buf = (void *)kmem_alloc(&kernel_map, nbuf * sizeof(struct buf));
167 swbuf = (void *)kmem_alloc(&kernel_map, nswbuf * sizeof(struct buf));
173 kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
174 (nbuf*BKVASIZE*2) + (nswbuf*MAXPHYS) + pager_map_size);
175 kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
177 buffer_map.system_map = 1;
178 kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
179 (nswbuf*MAXPHYS) + pager_map_size);
180 pager_map.system_map = 1;
181 kprintf("avail memory = %lu (%luK bytes)\n", ptoa(vmstats.v_free_count),
182 ptoa(vmstats.v_free_count) / 1024);
189 * Determine i/o configuration for a machine.
192 configure_first(void *dummy)
197 configure(void *dummy)
200 * Final interrupt support acviation, then enable hardware interrupts.
202 MachIntrABI.finalize();
206 * This will configure all devices, generally starting with the
207 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly
208 * dummies up the attach in order to delay legacy initialization
209 * until after all other busses/subsystems have had a chance
210 * at those resources.
212 root_bus_configure();
216 * Explicitly probe and attach ISA last. The isa bus saves
217 * it's device node at attach time for us here.
220 isa_probe_children(isa_bus_device);
224 * Allow lowering of the ipl to the lowest kernel level if we
225 * panic (or call tsleep() before clearing `cold'). No level is
226 * completely safe (since a panic may occur in a critical region
227 * at splhigh()), but we want at least bio interrupts to work.
229 safepri = TDPRI_KERN_USER;
233 configure_final(void *dummy)
238 kprintf("Device configuration finished.\n");
242 void bootpc_init(void);
245 * Do legacy root filesystem discovery.
253 #if defined(NFS) && defined(NFS_ROOT)
254 #if !defined(BOOTP_NFSROOT)
255 pxe_setup_nfsdiskless();
256 if (nfs_diskless_valid)
258 rootdevnames[0] = "nfs:";
260 #if defined(FFS) && defined(FFS_ROOT)
261 if (!rootdevnames[0])
265 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL);
267 u_long bootdev = 0; /* not a cdev_t - encoding is different */
269 #if defined(FFS) && defined(FFS_ROOT)
272 * The boot code uses old block device major numbers to pass bootdev to
273 * us. We have to translate these to character device majors because
274 * we don't have block devices any more.
277 boot_translate_majdev(int bmajor)
279 static int conv[] = { BOOTMAJOR_CONVARY };
281 if (bmajor >= 0 && bmajor < NELEM(conv))
282 return(conv[bmajor]);
287 * Attempt to find the device from which we were booted.
288 * If we can do so, and not instructed not to do so,
289 * set rootdevs[] and rootdevnames[] to correspond to the
292 * This code survives in order to allow the system to be
293 * booted from legacy environments that do not correctly
294 * populate the kernel environment. There are significant
295 * restrictions on the bootability of the system in this
296 * situation; it can only be mounting root from a 'da'
297 * 'wd' or 'fd' device, and the root filesystem must be ufs.
302 int majdev, mindev, unit, slice, part;
303 cdev_t newrootdev, dev;
307 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
308 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
311 majdev = boot_translate_majdev(B_TYPE(bootdev));
313 kprintf("bootdev: %08lx type=%ld unit=%ld "
314 "slice=%ld part=%ld major=%d\n",
315 bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
316 B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
318 dev = udev2dev(makeudev(majdev, 0), 0);
319 if (!dev_is_good(dev))
321 unit = B_UNIT(bootdev);
322 slice = B_SLICE(bootdev);
323 if (slice == WHOLE_DISK_SLICE)
324 slice = COMPATIBILITY_SLICE;
325 if (slice < 0 || slice >= MAX_SLICES) {
326 kprintf("bad slice\n");
330 part = B_PARTITION(bootdev);
331 mindev = dkmakeminor(unit, slice, part);
332 newrootdev = udev2dev(makeudev(majdev, mindev), 0);
333 if (!dev_is_good(newrootdev))
335 sname = dsname(newrootdev, unit, slice, part, partname);
336 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
337 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
340 * For properly dangerously dedicated disks (ones with a historical
341 * bogus partition table), the boot blocks will give slice = 4, but
342 * the kernel will only provide the compatibility slice since it
343 * knows that slice 4 is not a real slice. Arrange to try mounting
344 * the compatibility slice as root if mounting the slice passed by
345 * the boot blocks fails. This handles the dangerously dedicated
346 * case and perhaps others.
348 if (slice == COMPATIBILITY_SLICE)
350 slice = COMPATIBILITY_SLICE;
351 sname = dsname(newrootdev, unit, slice, part, partname);
352 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
353 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
357 #if defined(NFS) && defined(NFS_ROOT)
358 #if !defined(BOOTP_NFSROOT)
360 #include <sys/socket.h>
362 #include <net/if_dl.h>
363 #include <net/if_types.h>
364 #include <net/if_var.h>
365 #include <net/ethernet.h>
366 #include <netinet/in.h>
367 #include <vfs/nfs/rpcv2.h>
368 #include <vfs/nfs/nfsproto.h>
369 #include <vfs/nfs/nfs.h>
370 #include <vfs/nfs/nfsdiskless.h>
372 extern struct nfs_diskless nfs_diskless;
375 * Convert a kenv variable to a sockaddr. If the kenv variable does not
376 * exist the sockaddr will remain zerod out (callers typically just check
377 * sin_len). A network address of 0.0.0.0 is equivalent to failure.
380 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
385 bzero(sa, sizeof(*sa));
387 if ((cp = kgetenv(ev)) == NULL)
389 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
391 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
393 /* XXX is this ordering correct? */
394 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
395 sa->sin_len = sizeof(*sa);
396 sa->sin_family = AF_INET;
401 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
406 bzero(sa, sizeof(*sa));
407 sa->sdl_len = sizeof(*sa);
408 sa->sdl_family = AF_LINK;
409 sa->sdl_type = IFT_ETHER;
410 sa->sdl_alen = ETHER_ADDR_LEN;
411 if ((cp = kgetenv(ev)) == NULL)
413 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
415 sa->sdl_data[0] = a[0];
416 sa->sdl_data[1] = a[1];
417 sa->sdl_data[2] = a[2];
418 sa->sdl_data[3] = a[3];
419 sa->sdl_data[4] = a[4];
420 sa->sdl_data[5] = a[5];
425 decode_nfshandle(char *ev, u_char *fh)
430 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
437 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
448 * Populate the essential fields in the nfsv3_diskless structure.
450 * The loader is expected to export the following environment variables:
452 * boot.netif.ip IP address on boot interface
453 * boot.netif.netmask netmask on boot interface
454 * boot.netif.gateway default gateway (optional)
455 * boot.netif.hwaddr hardware address of boot interface
456 * boot.netif.name name of boot interface (instead of hw addr)
457 * boot.nfsroot.server IP address of root filesystem server
458 * boot.nfsroot.path path of the root filesystem on server
459 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
462 pxe_setup_nfsdiskless(void)
464 struct nfs_diskless *nd = &nfs_diskless;
467 struct sockaddr_dl *sdl, ourdl;
468 struct sockaddr_in myaddr, netmask;
471 /* set up interface */
472 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
474 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
475 kprintf("PXE: no netmask\n");
478 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
479 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
480 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
481 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
482 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
484 if ((cp = kgetenv("boot.netif.name")) != NULL) {
488 strlcpy(nd->myif.ifra_name, ifp->if_xname,
489 sizeof(nd->myif.ifra_name));
494 kprintf("PXE: cannot find interface %s\n", cp);
498 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
499 kprintf("PXE: no hardware address\n");
504 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
505 struct ifaddr_container *ifac;
507 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
510 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
511 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
512 if ((sdl->sdl_type == ourdl.sdl_type) &&
513 (sdl->sdl_alen == ourdl.sdl_alen) &&
514 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
515 ourdl.sdl_data + ourdl.sdl_nlen,
517 strlcpy(nd->myif.ifra_name,
519 sizeof(nd->myif.ifra_name));
527 kprintf("PXE: no interface\n");
528 return; /* no matching interface */
531 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
533 /* XXX set up swap? */
535 /* set up root mount */
536 nd->root_args.rsize = nfsroot_iosize;
537 nd->root_args.wsize = nfsroot_iosize;
538 nd->root_args.sotype = SOCK_STREAM;
539 nd->root_args.readahead = nfsroot_rahead;
540 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT |
542 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
543 kprintf("PXE: no server\n");
546 nd->root_saddr.sin_port = htons(NFS_PORT);
549 * A tftp-only loader may pass NFS path information without a
550 * root handle. Generate a warning but continue configuring.
552 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
553 kprintf("PXE: Warning, no NFS handle passed from loader\n");
555 if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
556 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
558 nfs_diskless_valid = 1;