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"
46 #include "opt_cd9660.h"
48 #include "opt_nfsroot.h"
49 #include "opt_rootdevname.h"
53 #include <sys/param.h>
54 #include <sys/systm.h>
55 #include <sys/bootmaj.h>
58 #include <sys/diskslice.h>
59 #include <sys/reboot.h>
60 #include <sys/kernel.h>
61 #include <sys/malloc.h>
62 #include <sys/mount.h>
64 #include <sys/thread.h>
65 #include <sys/device.h>
66 #include <sys/machintr.h>
68 #include <machine/bootinfo.h>
69 #include <machine/md_var.h>
70 #include <machine/smp.h>
71 #include <machine_base/icu/icu.h>
73 #include <machine/pcb.h>
74 #include <machine/pcb_ext.h>
75 #include <machine/globaldata.h>
78 #include <bus/isa/isavar.h>
80 device_t isa_bus_device
= NULL
;
83 static void configure_first (void *);
84 static void configure (void *);
85 static void configure_final (void *);
87 #if defined(NFS) && defined(NFS_ROOT)
88 #if !defined(BOOTP_NFSROOT)
89 static void pxe_setup_nfsdiskless(void);
93 SYSINIT(configure1
, SI_SUB_CONFIGURE
, SI_ORDER_FIRST
, configure_first
, NULL
);
94 /* SI_ORDER_SECOND is hookable */
95 SYSINIT(configure2
, SI_SUB_CONFIGURE
, SI_ORDER_THIRD
, configure
, NULL
);
96 /* SI_ORDER_MIDDLE is hookable */
97 SYSINIT(configure3
, SI_SUB_CONFIGURE
, SI_ORDER_ANY
, configure_final
, NULL
);
99 cdev_t rootdev
= NULL
;
100 cdev_t dumpdev
= NULL
;
103 * nfsroot.iosize may be set in loader.conf, 32768 is recommended to
104 * be able to max-out a GigE link if the server supports it. Many servers
105 * do not so the default is 8192.
107 * nfsroot.rahead defaults to something reasonable, can be overridden.
109 static int nfsroot_iosize
= 8192;
110 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize
);
111 static int nfsroot_rahead
= 4;
112 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead
);
115 * Determine i/o configuration for a machine.
118 configure_first(void *dummy
)
123 configure(void *dummy
)
126 void *low_dma_reserve
;
129 * Try to reserve 512k of low dma memory for later isa attach.
130 * Document as a REALLY bad hack.
132 low_dma_reserve
= contigmalloc(0x80000, M_TEMP
, M_NOWAIT
, 0ul,
133 0xfffffful
, 1ul, 0x20000ul
);
135 kprintf("low dma reserve placed @ %p\n", low_dma_reserve
);
139 * This will configure all devices, generally starting with the
140 * nexus (pc64/x86_64/nexus.c). The nexus ISA code explicitly
141 * dummies up the attach in order to delay legacy initialization
142 * until after all other busses/subsystems have had a chance
143 * at those resources.
145 root_bus_configure();
149 * Free up reserve if we got it.
151 if (low_dma_reserve
!= NULL
) {
152 kprintf("Freeing low dma reserve @ %p\n", low_dma_reserve
);
153 contigfree(low_dma_reserve
, 0x80000, M_TEMP
);
154 } else if (bootverbose
) {
155 kprintf("low dma reserve was not allocated\n");
159 * Explicitly probe and attach ISA last. The isa bus saves
160 * it's device node at attach time for us here.
163 isa_probe_children(isa_bus_device
);
167 * Allow lowering of the ipl to the lowest kernel level if we
168 * panic (or call tsleep() before clearing `cold'). No level is
169 * completely safe (since a panic may occur in a critical region
170 * at splhigh()), but we want at least bio interrupts to work.
172 safepri
= TDPRI_KERN_USER
;
176 configure_final(void *dummy
)
183 * Print out the BIOS's idea of the disk geometries.
186 kprintf("BIOS Geometries:\n");
187 for (i
= 0; i
< N_BIOS_GEOM
; i
++) {
188 unsigned long bios_geom
;
189 int max_cylinder
, max_head
, max_sector
;
191 bios_geom
= bootinfo
.bi_bios_geom
[i
];
194 * XXX the bootstrap punts a 1200K floppy geometry
195 * when the get-disk-geometry interrupt fails. Skip
196 * drives that have this geometry.
198 if (bios_geom
== 0x4f010f)
201 kprintf(" %x:%08lx ", i
, bios_geom
);
202 max_cylinder
= bios_geom
>> 16;
203 max_head
= (bios_geom
>> 8) & 0xff;
204 max_sector
= bios_geom
& 0xff;
206 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
207 max_cylinder
, max_cylinder
+ 1,
208 max_head
, max_head
+ 1,
209 max_sector
, max_sector
);
211 kprintf(" %d accounted for\n", bootinfo
.bi_n_bios_used
);
213 kprintf("Device configuration finished.\n");
219 void bootpc_init(void);
222 * Do legacy root filesystem discovery.
230 #if defined(NFS) && defined(NFS_ROOT)
231 #if !defined(BOOTP_NFSROOT)
232 pxe_setup_nfsdiskless();
233 if (nfs_diskless_valid
)
235 rootdevnames
[0] = "nfs:";
238 SYSINIT(cpu_rootconf
, SI_SUB_ROOT_CONF
, SI_ORDER_FIRST
, cpu_rootconf
, NULL
);
240 #if defined(NFS) && defined(NFS_ROOT)
241 #if !defined(BOOTP_NFSROOT)
243 #include <sys/socket.h>
245 #include <net/if_dl.h>
246 #include <net/if_types.h>
247 #include <net/if_var.h>
248 #include <net/ethernet.h>
249 #include <netinet/in.h>
250 #include <vfs/nfs/rpcv2.h>
251 #include <vfs/nfs/nfsproto.h>
252 #include <vfs/nfs/nfs.h>
253 #include <vfs/nfs/nfsdiskless.h>
255 extern struct nfs_diskless nfs_diskless
;
258 * Convert a kenv variable to a sockaddr. If the kenv variable does not
259 * exist the sockaddr will remain zerod out (callers typically just check
260 * sin_len). A network address of 0.0.0.0 is equivalent to failure.
263 inaddr_to_sockaddr(char *ev
, struct sockaddr_in
*sa
)
268 bzero(sa
, sizeof(*sa
));
270 if ((cp
= kgetenv(ev
)) == NULL
)
272 if (ksscanf(cp
, "%d.%d.%d.%d", &a
[0], &a
[1], &a
[2], &a
[3]) != 4)
274 if (a
[0] == 0 && a
[1] == 0 && a
[2] == 0 && a
[3] == 0)
276 /* XXX is this ordering correct? */
277 sa
->sin_addr
.s_addr
= (a
[3] << 24) + (a
[2] << 16) + (a
[1] << 8) + a
[0];
278 sa
->sin_len
= sizeof(*sa
);
279 sa
->sin_family
= AF_INET
;
284 hwaddr_to_sockaddr(char *ev
, struct sockaddr_dl
*sa
)
289 bzero(sa
, sizeof(*sa
));
290 sa
->sdl_len
= sizeof(*sa
);
291 sa
->sdl_family
= AF_LINK
;
292 sa
->sdl_type
= IFT_ETHER
;
293 sa
->sdl_alen
= ETHER_ADDR_LEN
;
294 if ((cp
= kgetenv(ev
)) == NULL
)
296 if (ksscanf(cp
, "%x:%x:%x:%x:%x:%x", &a
[0], &a
[1], &a
[2], &a
[3], &a
[4], &a
[5]) != 6)
298 sa
->sdl_data
[0] = a
[0];
299 sa
->sdl_data
[1] = a
[1];
300 sa
->sdl_data
[2] = a
[2];
301 sa
->sdl_data
[3] = a
[3];
302 sa
->sdl_data
[4] = a
[4];
303 sa
->sdl_data
[5] = a
[5];
308 decode_nfshandle(char *ev
, u_char
*fh
)
313 if (((cp
= kgetenv(ev
)) == NULL
) || (strlen(cp
) < 2) || (*cp
!= 'X'))
320 if ((ksscanf(cp
, "%2x", &val
) != 1) || (val
> 0xff))
331 * Populate the essential fields in the nfsv3_diskless structure.
333 * The loader is expected to export the following environment variables:
335 * boot.netif.ip IP address on boot interface
336 * boot.netif.netmask netmask on boot interface
337 * boot.netif.gateway default gateway (optional)
338 * boot.netif.hwaddr hardware address of boot interface
339 * boot.nfsroot.server IP address of root filesystem server
340 * boot.nfsroot.path path of the root filesystem on server
341 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
344 pxe_setup_nfsdiskless(void)
346 struct nfs_diskless
*nd
= &nfs_diskless
;
348 struct sockaddr_dl
*sdl
, ourdl
;
349 struct sockaddr_in myaddr
, netmask
;
352 /* set up interface */
353 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr
))
355 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask
)) {
356 kprintf("PXE: no netmask\n");
359 bcopy(&myaddr
, &nd
->myif
.ifra_addr
, sizeof(myaddr
));
360 bcopy(&myaddr
, &nd
->myif
.ifra_broadaddr
, sizeof(myaddr
));
361 ((struct sockaddr_in
*) &nd
->myif
.ifra_broadaddr
)->sin_addr
.s_addr
=
362 myaddr
.sin_addr
.s_addr
| ~ netmask
.sin_addr
.s_addr
;
363 bcopy(&netmask
, &nd
->myif
.ifra_mask
, sizeof(netmask
));
365 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl
)) {
366 kprintf("PXE: no hardware address\n");
370 TAILQ_FOREACH(ifp
, &ifnetlist
, if_link
) {
371 struct ifaddr_container
*ifac
;
373 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
374 struct ifaddr
*ifa
= ifac
->ifa
;
376 if ((ifa
->ifa_addr
->sa_family
== AF_LINK
) &&
377 (sdl
= ((struct sockaddr_dl
*)ifa
->ifa_addr
))) {
378 if ((sdl
->sdl_type
== ourdl
.sdl_type
) &&
379 (sdl
->sdl_alen
== ourdl
.sdl_alen
) &&
380 !bcmp(sdl
->sdl_data
+ sdl
->sdl_nlen
,
381 ourdl
.sdl_data
+ ourdl
.sdl_nlen
,
383 strlcpy(nd
->myif
.ifra_name
,
385 sizeof(nd
->myif
.ifra_name
));
393 kprintf("PXE: no interface\n");
394 return; /* no matching interface */
397 inaddr_to_sockaddr("boot.netif.gateway", &nd
->mygateway
);
399 /* XXX set up swap? */
401 /* set up root mount */
402 nd
->root_args
.rsize
= nfsroot_iosize
;
403 nd
->root_args
.wsize
= nfsroot_iosize
;
404 nd
->root_args
.sotype
= SOCK_STREAM
;
405 nd
->root_args
.readahead
= nfsroot_rahead
;
406 nd
->root_args
.flags
= NFSMNT_WSIZE
| NFSMNT_RSIZE
| NFSMNT_RESVPORT
|
408 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd
->root_saddr
)) {
409 kprintf("PXE: no server\n");
412 nd
->root_saddr
.sin_port
= htons(NFS_PORT
);
415 * A tftp-only loader may pass NFS path information without a
416 * root handle. Generate a warning but continue configuring.
418 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd
->root_fh
[0]) == 0) {
419 kprintf("PXE: Warning, no NFS handle passed from loader\n");
421 if ((cp
= kgetenv("boot.nfsroot.path")) != NULL
)
422 strncpy(nd
->root_hostnam
, cp
, MNAMELEN
- 1);
424 nfs_diskless_valid
= 1;