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/pc64/amd64/autoconf.c,v 1.2 2008/03/08 07:50:49 sephe 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/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>
76 #include <vm/vm_kern.h>
77 #include <vm/vm_extern.h>
78 #include <vm/vm_pager.h>
81 #include <machine/pcb.h>
82 #include <machine/pcb_ext.h>
83 #include <machine/vm86.h>
85 #include <machine/smp.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
= NULL
;
118 cdev_t dumpdev
= NULL
;
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
;
131 kprintf("%s", version
);
132 kprintf("real memory = %llu (%lluK bytes)\n",
133 ptoa(Maxmem
), ptoa(Maxmem
) / 1024);
136 int factor
= 4 * BKVASIZE
/ 1024;
137 int kbytes
= Maxmem
* (PAGE_SIZE
/ 1024);
141 nbuf
+= min((kbytes
- 4096) / factor
, 65536 / factor
);
143 nbuf
+= (kbytes
- 65536) * 2 / (factor
* 5);
144 if (maxbcache
&& nbuf
> maxbcache
/ BKVASIZE
)
145 nbuf
= maxbcache
/ BKVASIZE
;
147 if (nbuf
> (virtual_end
- virtual_start
) / (BKVASIZE
* 2)) {
148 nbuf
= (virtual_end
- virtual_start
) / (BKVASIZE
* 2);
149 kprintf("Warning: nbufs capped at %d\n", nbuf
);
152 nswbuf
= max(min(nbuf
/4, 256), 16);
154 if (nswbuf
< NSWBUF_MIN
)
159 * Allocate memory for the buffer cache
161 buf
= (void *)kmem_alloc(&kernel_map
, nbuf
* sizeof(struct buf
));
162 swbuf
= (void *)kmem_alloc(&kernel_map
, nswbuf
* sizeof(struct buf
));
168 kmem_suballoc(&kernel_map
, &clean_map
, &clean_sva
, &clean_eva
,
169 (nbuf
*BKVASIZE
) + (nswbuf
*MAXPHYS
) + pager_map_size
);
170 kmem_suballoc(&clean_map
, &buffer_map
, &buffer_sva
, &buffer_eva
,
172 buffer_map
.system_map
= 1;
173 kmem_suballoc(&clean_map
, &pager_map
, &pager_sva
, &pager_eva
,
174 (nswbuf
*MAXPHYS
) + pager_map_size
);
175 pager_map
.system_map
= 1;
176 #if defined(USERCONFIG)
178 cninit(); /* the preferred console may have changed */
180 kprintf("avail memory = %u (%uK bytes)\n", ptoa(vmstats
.v_free_count
),
181 ptoa(vmstats
.v_free_count
) / 1024);
183 vm_pager_bufferinit();
192 * Determine i/o configuration for a machine.
195 configure_first(void *dummy
)
200 configure(void *dummy
)
203 * Final interrupt support acviation, then enable hardware interrupts.
205 MachIntrABI
.finalize();
209 * This will configure all devices, generally starting with the
210 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly
211 * dummies up the attach in order to delay legacy initialization
212 * until after all other busses/subsystems have had a chance
213 * at those resources.
215 root_bus_configure();
219 * Explicitly probe and attach ISA last. The isa bus saves
220 * it's device node at attach time for us here.
223 isa_probe_children(isa_bus_device
);
227 * Allow lowering of the ipl to the lowest kernel level if we
228 * panic (or call tsleep() before clearing `cold'). No level is
229 * completely safe (since a panic may occur in a critical region
230 * at splhigh()), but we want at least bio interrupts to work.
232 safepri
= TDPRI_KERN_USER
;
236 configure_final(void *dummy
)
241 kprintf("Device configuration finished.\n");
245 void bootpc_init(void);
248 * Do legacy root filesystem discovery.
256 #if defined(NFS) && defined(NFS_ROOT)
257 #if !defined(BOOTP_NFSROOT)
258 pxe_setup_nfsdiskless();
259 if (nfs_diskless_valid
)
261 rootdevnames
[0] = "nfs:";
263 #if defined(FFS) && defined(FFS_ROOT)
264 if (!rootdevnames
[0])
268 SYSINIT(cpu_rootconf
, SI_SUB_ROOT_CONF
, SI_ORDER_FIRST
, cpu_rootconf
, NULL
)
270 u_long bootdev
= 0; /* not a cdev_t - encoding is different */
272 #if defined(FFS) && defined(FFS_ROOT)
275 * The boot code uses old block device major numbers to pass bootdev to
276 * us. We have to translate these to character device majors because
277 * we don't have block devices any more.
280 boot_translate_majdev(int bmajor
)
282 static int conv
[] = { BOOTMAJOR_CONVARY
};
284 if (bmajor
>= 0 && bmajor
< sizeof(conv
)/sizeof(conv
[0]))
285 return(conv
[bmajor
]);
290 * Attempt to find the device from which we were booted.
291 * If we can do so, and not instructed not to do so,
292 * set rootdevs[] and rootdevnames[] to correspond to the
295 * This code survives in order to allow the system to be
296 * booted from legacy environments that do not correctly
297 * populate the kernel environment. There are significant
298 * restrictions on the bootability of the system in this
299 * situation; it can only be mounting root from a 'da'
300 * 'wd' or 'fd' device, and the root filesystem must be ufs.
305 int majdev
, mindev
, unit
, slice
, part
;
306 cdev_t newrootdev
, dev
;
310 if ((bootdev
& B_MAGICMASK
) != B_DEVMAGIC
) {
311 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev
);
314 majdev
= boot_translate_majdev(B_TYPE(bootdev
));
316 kprintf("bootdev: %08lx type=%ld unit=%ld "
317 "slice=%ld part=%ld major=%d\n",
318 bootdev
, B_TYPE(bootdev
), B_UNIT(bootdev
),
319 B_SLICE(bootdev
), B_PARTITION(bootdev
), majdev
);
321 dev
= udev2dev(makeudev(majdev
, 0), 0);
322 if (!dev_is_good(dev
))
324 unit
= B_UNIT(bootdev
);
325 slice
= B_SLICE(bootdev
);
326 if (slice
== WHOLE_DISK_SLICE
)
327 slice
= COMPATIBILITY_SLICE
;
328 if (slice
< 0 || slice
>= MAX_SLICES
) {
329 kprintf("bad slice\n");
333 part
= B_PARTITION(bootdev
);
334 mindev
= dkmakeminor(unit
, slice
, part
);
335 newrootdev
= udev2dev(makeudev(majdev
, mindev
), 0);
336 if (!dev_is_good(newrootdev
))
338 sname
= dsname(newrootdev
, unit
, slice
, part
, partname
);
339 rootdevnames
[0] = kmalloc(strlen(sname
) + 6, M_DEVBUF
, M_WAITOK
);
340 ksprintf(rootdevnames
[0], "ufs:%s%s", sname
, partname
);
343 * For properly dangerously dedicated disks (ones with a historical
344 * bogus partition table), the boot blocks will give slice = 4, but
345 * the kernel will only provide the compatibility slice since it
346 * knows that slice 4 is not a real slice. Arrange to try mounting
347 * the compatibility slice as root if mounting the slice passed by
348 * the boot blocks fails. This handles the dangerously dedicated
349 * case and perhaps others.
351 if (slice
== COMPATIBILITY_SLICE
)
353 slice
= COMPATIBILITY_SLICE
;
354 sname
= dsname(newrootdev
, unit
, slice
, part
, partname
);
355 rootdevnames
[1] = kmalloc(strlen(sname
) + 6, M_DEVBUF
, M_WAITOK
);
356 ksprintf(rootdevnames
[1], "ufs:%s%s", sname
, partname
);
360 #if defined(NFS) && defined(NFS_ROOT)
361 #if !defined(BOOTP_NFSROOT)
363 #include <sys/socket.h>
365 #include <net/if_dl.h>
366 #include <net/if_types.h>
367 #include <net/if_var.h>
368 #include <net/ethernet.h>
369 #include <netinet/in.h>
370 #include <vfs/nfs/rpcv2.h>
371 #include <vfs/nfs/nfsproto.h>
372 #include <vfs/nfs/nfs.h>
373 #include <vfs/nfs/nfsdiskless.h>
375 extern struct nfs_diskless nfs_diskless
;
378 * Convert a kenv variable to a sockaddr. If the kenv variable does not
379 * exist the sockaddr will remain zerod out (callers typically just check
380 * sin_len). A network address of 0.0.0.0 is equivalent to failure.
383 inaddr_to_sockaddr(char *ev
, struct sockaddr_in
*sa
)
388 bzero(sa
, sizeof(*sa
));
390 if ((cp
= kgetenv(ev
)) == NULL
)
392 if (ksscanf(cp
, "%d.%d.%d.%d", &a
[0], &a
[1], &a
[2], &a
[3]) != 4)
394 if (a
[0] == 0 && a
[1] == 0 && a
[2] == 0 && a
[3] == 0)
396 /* XXX is this ordering correct? */
397 sa
->sin_addr
.s_addr
= (a
[3] << 24) + (a
[2] << 16) + (a
[1] << 8) + a
[0];
398 sa
->sin_len
= sizeof(*sa
);
399 sa
->sin_family
= AF_INET
;
404 hwaddr_to_sockaddr(char *ev
, struct sockaddr_dl
*sa
)
409 bzero(sa
, sizeof(*sa
));
410 sa
->sdl_len
= sizeof(*sa
);
411 sa
->sdl_family
= AF_LINK
;
412 sa
->sdl_type
= IFT_ETHER
;
413 sa
->sdl_alen
= ETHER_ADDR_LEN
;
414 if ((cp
= kgetenv(ev
)) == NULL
)
416 if (ksscanf(cp
, "%x:%x:%x:%x:%x:%x", &a
[0], &a
[1], &a
[2], &a
[3], &a
[4], &a
[5]) != 6)
418 sa
->sdl_data
[0] = a
[0];
419 sa
->sdl_data
[1] = a
[1];
420 sa
->sdl_data
[2] = a
[2];
421 sa
->sdl_data
[3] = a
[3];
422 sa
->sdl_data
[4] = a
[4];
423 sa
->sdl_data
[5] = a
[5];
428 decode_nfshandle(char *ev
, u_char
*fh
)
433 if (((cp
= kgetenv(ev
)) == NULL
) || (strlen(cp
) < 2) || (*cp
!= 'X'))
440 if ((ksscanf(cp
, "%2x", &val
) != 1) || (val
> 0xff))
451 * Populate the essential fields in the nfsv3_diskless structure.
453 * The loader is expected to export the following environment variables:
455 * boot.netif.ip IP address on boot interface
456 * boot.netif.netmask netmask on boot interface
457 * boot.netif.gateway default gateway (optional)
458 * boot.netif.hwaddr hardware address of boot interface
459 * boot.nfsroot.server IP address of root filesystem server
460 * boot.nfsroot.path path of the root filesystem on server
461 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
464 pxe_setup_nfsdiskless(void)
466 struct nfs_diskless
*nd
= &nfs_diskless
;
469 struct sockaddr_dl
*sdl
, ourdl
;
470 struct sockaddr_in myaddr
, netmask
;
473 /* set up interface */
474 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr
))
476 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask
)) {
477 kprintf("PXE: no netmask\n");
480 bcopy(&myaddr
, &nd
->myif
.ifra_addr
, sizeof(myaddr
));
481 bcopy(&myaddr
, &nd
->myif
.ifra_broadaddr
, sizeof(myaddr
));
482 ((struct sockaddr_in
*) &nd
->myif
.ifra_broadaddr
)->sin_addr
.s_addr
=
483 myaddr
.sin_addr
.s_addr
| ~ netmask
.sin_addr
.s_addr
;
484 bcopy(&netmask
, &nd
->myif
.ifra_mask
, sizeof(netmask
));
486 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl
)) {
487 kprintf("PXE: no hardware address\n");
491 ifp
= TAILQ_FIRST(&ifnet
);
492 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
493 struct ifaddr_container
*ifac
;
495 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], 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;