Device layer rollup commit.
[dragonfly.git] / sys / i386 / i386 / autoconf.c
CommitLineData
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1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
23 *
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
34 * SUCH DAMAGE.
35 *
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 $
e4c9c0c8 38 * $DragonFly: src/sys/i386/i386/Attic/autoconf.c,v 1.12 2004/05/19 22:52:57 dillon Exp $
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39 */
40
41/*
42 * Setup the system to run on the current machine.
43 *
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.
48 */
49#include "opt_bootp.h"
50#include "opt_ffs.h"
51#include "opt_cd9660.h"
52#include "opt_nfs.h"
53#include "opt_nfsroot.h"
54#include "opt_bus.h"
55#include "opt_rootdevname.h"
56
1f2de5d4 57#include "use_isa.h"
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58
59#include <sys/param.h>
60#include <sys/systm.h>
fabb8ceb 61#include <sys/bootmaj.h>
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62#include <sys/bus.h>
63#include <sys/conf.h>
64#include <sys/disklabel.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>
70#include <sys/cons.h>
8f41e33b 71#include <sys/thread.h>
335dda38 72#include <sys/device.h>
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73
74#include <machine/bootinfo.h>
75#include <machine/ipl.h>
76#include <machine/md_var.h>
77#ifdef APIC_IO
78#include <machine/smp.h>
79#else
80#include <i386/isa/icu.h>
81#endif /* APIC_IO */
82
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83#include <machine/pcb.h>
84#include <machine/pcb_ext.h>
85#include <machine/vm86.h>
86#include <machine/globaldata.h>
8f41e33b 87
984263bc 88#if NISA > 0
1f2de5d4 89#include <bus/isa/isavar.h>
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90
91device_t isa_bus_device = 0;
92#endif
93
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94static void configure_first (void *);
95static void configure (void *);
96static void configure_final (void *);
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97
98#if defined(FFS) && defined(FFS_ROOT)
3ae0cd58 99static void setroot (void);
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100#endif
101
102#if defined(NFS) && defined(NFS_ROOT)
f15db79e 103#if !defined(BOOTP_NFSROOT)
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104static void pxe_setup_nfsdiskless(void);
105#endif
f15db79e 106#endif
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107
108SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
109/* SI_ORDER_SECOND is hookable */
110SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
111/* SI_ORDER_MIDDLE is hookable */
112SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
113
114dev_t rootdev = NODEV;
115dev_t dumpdev = NODEV;
116
117device_t nexus_dev;
118
119/*
120 * Determine i/o configuration for a machine.
121 */
122static void
123configure_first(dummy)
124 void *dummy;
125{
126}
127
128static void
129configure(dummy)
130 void *dummy;
131{
132
133 /*
134 * Activate the ICU's. Note that we are explicitly at splhigh()
135 * at present as we have no way to disable stray PCI level triggered
136 * interrupts until the devices have had a driver attached. This
137 * is particularly a problem when the interrupts are shared. For
138 * example, if IRQ 10 is shared between a disk and network device
139 * and the disk device generates an interrupt, if we "activate"
140 * IRQ 10 when the network driver is set up, then we will get
141 * recursive interrupt 10's as nothing will know how to turn off
142 * the disk device's interrupt.
143 *
144 * Having the ICU's active means we can probe interrupt routing to
145 * see if a device causes the corresponding pending bit to be set.
146 *
147 * This is all rather inconvenient.
148 */
149#ifdef APIC_IO
150 bsp_apic_configure();
8a8d5d85 151 cpu_enable_intr();
984263bc 152#else
8a8d5d85 153 cpu_enable_intr();
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154 INTREN(IRQ_SLAVE);
155#endif /* APIC_IO */
156
157 /* nexus0 is the top of the i386 device tree */
158 device_add_child(root_bus, "nexus", 0);
159
160 /* initialize new bus architecture */
161 root_bus_configure();
162
163#if NISA > 0
164 /*
165 * Explicitly probe and attach ISA last. The isa bus saves
166 * it's device node at attach time for us here.
167 */
168 if (isa_bus_device)
169 isa_probe_children(isa_bus_device);
170#endif
171
172 /*
173 * Now we're ready to handle (pending) interrupts.
174 * XXX this is slightly misplaced.
175 */
176 spl0();
177
178 /*
179 * Allow lowering of the ipl to the lowest kernel level if we
180 * panic (or call tsleep() before clearing `cold'). No level is
181 * completely safe (since a panic may occur in a critical region
182 * at splhigh()), but we want at least bio interrupts to work.
183 */
8f41e33b 184 safepri = curthread->td_cpl;
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185}
186
187static void
188configure_final(dummy)
189 void *dummy;
190{
191 int i;
192
193 cninit_finish();
194
195 if (bootverbose) {
196
197#ifdef APIC_IO
198 imen_dump();
199#endif /* APIC_IO */
200
201 /*
202 * Print out the BIOS's idea of the disk geometries.
203 */
204 printf("BIOS Geometries:\n");
205 for (i = 0; i < N_BIOS_GEOM; i++) {
206 unsigned long bios_geom;
207 int max_cylinder, max_head, max_sector;
208
209 bios_geom = bootinfo.bi_bios_geom[i];
210
211 /*
212 * XXX the bootstrap punts a 1200K floppy geometry
213 * when the get-disk-geometry interrupt fails. Skip
214 * drives that have this geometry.
215 */
216 if (bios_geom == 0x4f010f)
217 continue;
218
219 printf(" %x:%08lx ", i, bios_geom);
220 max_cylinder = bios_geom >> 16;
221 max_head = (bios_geom >> 8) & 0xff;
222 max_sector = bios_geom & 0xff;
223 printf(
224 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
225 max_cylinder, max_cylinder + 1,
226 max_head, max_head + 1,
227 max_sector, max_sector);
228 }
229 printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
230
231 printf("Device configuration finished.\n");
232 }
233 cold = 0;
234}
235
236#ifdef BOOTP
f15db79e 237void bootpc_init(void);
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238#endif
239/*
240 * Do legacy root filesystem discovery.
241 */
242void
243cpu_rootconf()
244{
245#ifdef BOOTP
246 bootpc_init();
247#endif
248#if defined(NFS) && defined(NFS_ROOT)
249#if !defined(BOOTP_NFSROOT)
250 pxe_setup_nfsdiskless();
251 if (nfs_diskless_valid)
252#endif
253 rootdevnames[0] = "nfs:";
254#endif
255#if defined(FFS) && defined(FFS_ROOT)
256 if (!rootdevnames[0])
257 setroot();
258#endif
259}
260SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
261
262u_long bootdev = 0; /* not a dev_t - encoding is different */
263
264#if defined(FFS) && defined(FFS_ROOT)
265#define FDMAJOR 2
266#define FDUNITSHIFT 6
267
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268/*
269 * The boot code uses old block device major numbers to pass bootdev to
270 * us. We have to translate these to character device majors because
271 * we don't have block devices any more.
272 */
273static int
274boot_translate_majdev(int bmajor)
275{
276 static int conv[] = { BOOTMAJOR_CONVARY };
277
278 if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
279 return(conv[bmajor]);
280 return(-1);
281}
282
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283/*
284 * Attempt to find the device from which we were booted.
285 * If we can do so, and not instructed not to do so,
286 * set rootdevs[] and rootdevnames[] to correspond to the
287 * boot device(s).
288 *
289 * This code survives in order to allow the system to be
290 * booted from legacy environments that do not correctly
291 * populate the kernel environment. There are significant
292 * restrictions on the bootability of the system in this
293 * situation; it can only be mounting root from a 'da'
294 * 'wd' or 'fd' device, and the root filesystem must be ufs.
295 */
296static void
297setroot()
298{
299 int majdev, mindev, unit, slice, part;
300 dev_t newrootdev, dev;
301 char partname[2];
302 char *sname;
303
304 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
305 printf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
306 return;
307 }
fabb8ceb 308 majdev = boot_translate_majdev(B_TYPE(bootdev));
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309 dev = udev2dev(makeudev(majdev, 0), 0);
310 if (!dev_is_good(dev))
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311 return;
312 unit = B_UNIT(bootdev);
313 slice = B_SLICE(bootdev);
314 if (slice == WHOLE_DISK_SLICE)
315 slice = COMPATIBILITY_SLICE;
316 if (slice < 0 || slice >= MAX_SLICES) {
317 printf("bad slice\n");
318 return;
319 }
320
321 /*
322 * XXX kludge for inconsistent unit numbering and lack of slice
323 * support for floppies.
324 */
fabb8ceb 325 if (majdev == FD_CDEV_MAJOR) {
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326 slice = COMPATIBILITY_SLICE;
327 part = RAW_PART;
328 mindev = unit << FDUNITSHIFT;
329 } else {
330 part = B_PARTITION(bootdev);
331 mindev = dkmakeminor(unit, slice, part);
332 }
e4c9c0c8 333 newrootdev = udev2dev(makeudev(majdev, mindev), 0);
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334 sname = dsname(newrootdev, unit, slice, part, partname);
335 rootdevnames[0] = malloc(strlen(sname) + 6, M_DEVBUF, M_NOWAIT);
336 sprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
337
338 /*
339 * For properly dangerously dedicated disks (ones with a historical
340 * bogus partition table), the boot blocks will give slice = 4, but
341 * the kernel will only provide the compatibility slice since it
342 * knows that slice 4 is not a real slice. Arrange to try mounting
343 * the compatibility slice as root if mounting the slice passed by
344 * the boot blocks fails. This handles the dangerously dedicated
345 * case and perhaps others.
346 */
347 if (slice == COMPATIBILITY_SLICE)
348 return;
349 slice = COMPATIBILITY_SLICE;
350 sname = dsname(newrootdev, unit, slice, part, partname);
351 rootdevnames[1] = malloc(strlen(sname) + 6, M_DEVBUF, M_NOWAIT);
352 sprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
353}
354#endif
355
356#if defined(NFS) && defined(NFS_ROOT)
f15db79e 357#if !defined(BOOTP_NFSROOT)
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358
359#include <sys/socket.h>
360#include <net/if.h>
361#include <net/if_dl.h>
362#include <net/if_types.h>
363#include <net/if_var.h>
364#include <net/ethernet.h>
365#include <netinet/in.h>
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366#include <vfs/nfs/rpcv2.h>
367#include <vfs/nfs/nfsproto.h>
368#include <vfs/nfs/nfs.h>
369#include <vfs/nfs/nfsdiskless.h>
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370
371extern struct nfs_diskless nfs_diskless;
372
373static int
374inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
375{
376 u_int32_t a[4];
377 char *cp;
378
379 bzero(sa, sizeof(*sa));
380 sa->sin_len = sizeof(*sa);
381 sa->sin_family = AF_INET;
382
383 if ((cp = getenv(ev)) == NULL)
384 return(1);
385 if (sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
386 return(1);
387 /* XXX is this ordering correct? */
388 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
389 return(0);
390}
391
392static int
393hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
394{
395 char *cp;
396 u_int32_t a[6];
397
398 bzero(sa, sizeof(*sa));
399 sa->sdl_len = sizeof(*sa);
400 sa->sdl_family = AF_LINK;
401 sa->sdl_type = IFT_ETHER;
402 sa->sdl_alen = ETHER_ADDR_LEN;
403 if ((cp = getenv(ev)) == NULL)
404 return(1);
405 if (sscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
406 return(1);
407 sa->sdl_data[0] = a[0];
408 sa->sdl_data[1] = a[1];
409 sa->sdl_data[2] = a[2];
410 sa->sdl_data[3] = a[3];
411 sa->sdl_data[4] = a[4];
412 sa->sdl_data[5] = a[5];
413 return(0);
414}
415
416static int
417decode_nfshandle(char *ev, u_char *fh)
418{
419 u_char *cp;
420 int len, val;
421
422 if (((cp = getenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
423 return(0);
424 len = 0;
425 cp++;
426 for (;;) {
427 if (*cp == 'X')
428 return(len);
429 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff))
430 return(0);
431 *(fh++) = val;
432 len++;
433 cp += 2;
434 if (len > NFSX_V2FH)
435 return(0);
436 }
437}
438
439/*
440 * Populate the essential fields in the nfsv3_diskless structure.
441 *
442 * The loader is expected to export the following environment variables:
443 *
444 * boot.netif.ip IP address on boot interface
445 * boot.netif.netmask netmask on boot interface
446 * boot.netif.gateway default gateway (optional)
447 * boot.netif.hwaddr hardware address of boot interface
448 * boot.nfsroot.server IP address of root filesystem server
449 * boot.nfsroot.path path of the root filesystem on server
450 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
451 */
452static void
453pxe_setup_nfsdiskless()
454{
455 struct nfs_diskless *nd = &nfs_diskless;
456 struct ifnet *ifp;
457 struct ifaddr *ifa;
458 struct sockaddr_dl *sdl, ourdl;
459 struct sockaddr_in myaddr, netmask;
460 char *cp;
461
462 /* set up interface */
463 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
464 return;
465 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
466 printf("PXE: no netmask\n");
467 return;
468 }
469 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
470 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
471 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
472 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
473 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
474
475 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
476 printf("PXE: no hardware address\n");
477 return;
478 }
479 ifa = NULL;
480 ifp = TAILQ_FIRST(&ifnet);
481 TAILQ_FOREACH(ifp, &ifnet, if_link) {
482 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
483 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
484 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
485 if ((sdl->sdl_type == ourdl.sdl_type) &&
486 (sdl->sdl_alen == ourdl.sdl_alen) &&
487 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
488 ourdl.sdl_data + ourdl.sdl_nlen,
489 sdl->sdl_alen))
490 goto match_done;
491 }
492 }
493 }
494 printf("PXE: no interface\n");
495 return; /* no matching interface */
496match_done:
3e4a09e7 497 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
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498
499 /* set up gateway */
500 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
501
502 /* XXX set up swap? */
503
504 /* set up root mount */
505 nd->root_args.rsize = 8192; /* XXX tunable? */
506 nd->root_args.wsize = 8192;
507 nd->root_args.sotype = SOCK_DGRAM;
508 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
509 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
510 printf("PXE: no server\n");
511 return;
512 }
513 nd->root_saddr.sin_port = htons(NFS_PORT);
514 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
515 printf("PXE: no NFS handle\n");
516 return;
517 }
518 if ((cp = getenv("boot.nfsroot.path")) != NULL)
519 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
520
521 nfs_diskless_valid = 1;
522}
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523
524#endif
984263bc 525#endif