MP Implementation 1/2: Get the APIC code working again, sweetly integrate the
[dragonfly.git] / sys / platform / pc32 / 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 $
8a8d5d85 38 * $DragonFly: src/sys/platform/pc32/i386/autoconf.c,v 1.5 2003/07/06 21:23:48 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
57#include "isa.h"
58
59#include <sys/param.h>
60#include <sys/systm.h>
61#include <sys/bus.h>
62#include <sys/conf.h>
63#include <sys/disklabel.h>
64#include <sys/diskslice.h>
65#include <sys/reboot.h>
66#include <sys/kernel.h>
67#include <sys/malloc.h>
68#include <sys/mount.h>
69#include <sys/cons.h>
8f41e33b 70#include <sys/thread.h>
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71
72#include <machine/bootinfo.h>
73#include <machine/ipl.h>
74#include <machine/md_var.h>
75#ifdef APIC_IO
76#include <machine/smp.h>
77#else
78#include <i386/isa/icu.h>
79#endif /* APIC_IO */
80
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81#include <machine/pcb.h>
82#include <machine/pcb_ext.h>
83#include <machine/vm86.h>
84#include <machine/globaldata.h>
8f41e33b 85
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86#if NISA > 0
87#include <isa/isavar.h>
88
89device_t isa_bus_device = 0;
90#endif
91
92static void configure_first __P((void *));
93static void configure __P((void *));
94static void configure_final __P((void *));
95
96#if defined(FFS) && defined(FFS_ROOT)
97static void setroot __P((void));
98#endif
99
100#if defined(NFS) && defined(NFS_ROOT)
101static void pxe_setup_nfsdiskless(void);
102#endif
103
104SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
105/* SI_ORDER_SECOND is hookable */
106SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
107/* SI_ORDER_MIDDLE is hookable */
108SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
109
110dev_t rootdev = NODEV;
111dev_t dumpdev = NODEV;
112
113device_t nexus_dev;
114
115/*
116 * Determine i/o configuration for a machine.
117 */
118static void
119configure_first(dummy)
120 void *dummy;
121{
122}
123
124static void
125configure(dummy)
126 void *dummy;
127{
128
129 /*
130 * Activate the ICU's. Note that we are explicitly at splhigh()
131 * at present as we have no way to disable stray PCI level triggered
132 * interrupts until the devices have had a driver attached. This
133 * is particularly a problem when the interrupts are shared. For
134 * example, if IRQ 10 is shared between a disk and network device
135 * and the disk device generates an interrupt, if we "activate"
136 * IRQ 10 when the network driver is set up, then we will get
137 * recursive interrupt 10's as nothing will know how to turn off
138 * the disk device's interrupt.
139 *
140 * Having the ICU's active means we can probe interrupt routing to
141 * see if a device causes the corresponding pending bit to be set.
142 *
143 * This is all rather inconvenient.
144 */
145#ifdef APIC_IO
146 bsp_apic_configure();
8a8d5d85 147 cpu_enable_intr();
984263bc 148#else
8a8d5d85 149 cpu_enable_intr();
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150 INTREN(IRQ_SLAVE);
151#endif /* APIC_IO */
152
153 /* nexus0 is the top of the i386 device tree */
154 device_add_child(root_bus, "nexus", 0);
155
156 /* initialize new bus architecture */
157 root_bus_configure();
158
159#if NISA > 0
160 /*
161 * Explicitly probe and attach ISA last. The isa bus saves
162 * it's device node at attach time for us here.
163 */
164 if (isa_bus_device)
165 isa_probe_children(isa_bus_device);
166#endif
167
168 /*
169 * Now we're ready to handle (pending) interrupts.
170 * XXX this is slightly misplaced.
171 */
172 spl0();
173
174 /*
175 * Allow lowering of the ipl to the lowest kernel level if we
176 * panic (or call tsleep() before clearing `cold'). No level is
177 * completely safe (since a panic may occur in a critical region
178 * at splhigh()), but we want at least bio interrupts to work.
179 */
8f41e33b 180 safepri = curthread->td_cpl;
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181}
182
183static void
184configure_final(dummy)
185 void *dummy;
186{
187 int i;
188
189 cninit_finish();
190
191 if (bootverbose) {
192
193#ifdef APIC_IO
194 imen_dump();
195#endif /* APIC_IO */
196
197 /*
198 * Print out the BIOS's idea of the disk geometries.
199 */
200 printf("BIOS Geometries:\n");
201 for (i = 0; i < N_BIOS_GEOM; i++) {
202 unsigned long bios_geom;
203 int max_cylinder, max_head, max_sector;
204
205 bios_geom = bootinfo.bi_bios_geom[i];
206
207 /*
208 * XXX the bootstrap punts a 1200K floppy geometry
209 * when the get-disk-geometry interrupt fails. Skip
210 * drives that have this geometry.
211 */
212 if (bios_geom == 0x4f010f)
213 continue;
214
215 printf(" %x:%08lx ", i, bios_geom);
216 max_cylinder = bios_geom >> 16;
217 max_head = (bios_geom >> 8) & 0xff;
218 max_sector = bios_geom & 0xff;
219 printf(
220 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
221 max_cylinder, max_cylinder + 1,
222 max_head, max_head + 1,
223 max_sector, max_sector);
224 }
225 printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
226
227 printf("Device configuration finished.\n");
228 }
229 cold = 0;
230}
231
232#ifdef BOOTP
233extern void bootpc_init(void);
234#endif
235/*
236 * Do legacy root filesystem discovery.
237 */
238void
239cpu_rootconf()
240{
241#ifdef BOOTP
242 bootpc_init();
243#endif
244#if defined(NFS) && defined(NFS_ROOT)
245#if !defined(BOOTP_NFSROOT)
246 pxe_setup_nfsdiskless();
247 if (nfs_diskless_valid)
248#endif
249 rootdevnames[0] = "nfs:";
250#endif
251#if defined(FFS) && defined(FFS_ROOT)
252 if (!rootdevnames[0])
253 setroot();
254#endif
255}
256SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
257
258u_long bootdev = 0; /* not a dev_t - encoding is different */
259
260#if defined(FFS) && defined(FFS_ROOT)
261#define FDMAJOR 2
262#define FDUNITSHIFT 6
263
264/*
265 * Attempt to find the device from which we were booted.
266 * If we can do so, and not instructed not to do so,
267 * set rootdevs[] and rootdevnames[] to correspond to the
268 * boot device(s).
269 *
270 * This code survives in order to allow the system to be
271 * booted from legacy environments that do not correctly
272 * populate the kernel environment. There are significant
273 * restrictions on the bootability of the system in this
274 * situation; it can only be mounting root from a 'da'
275 * 'wd' or 'fd' device, and the root filesystem must be ufs.
276 */
277static void
278setroot()
279{
280 int majdev, mindev, unit, slice, part;
281 dev_t newrootdev, dev;
282 char partname[2];
283 char *sname;
284
285 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
286 printf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
287 return;
288 }
289 majdev = B_TYPE(bootdev);
290 dev = makebdev(majdev, 0);
291 if (devsw(dev) == NULL)
292 return;
293 unit = B_UNIT(bootdev);
294 slice = B_SLICE(bootdev);
295 if (slice == WHOLE_DISK_SLICE)
296 slice = COMPATIBILITY_SLICE;
297 if (slice < 0 || slice >= MAX_SLICES) {
298 printf("bad slice\n");
299 return;
300 }
301
302 /*
303 * XXX kludge for inconsistent unit numbering and lack of slice
304 * support for floppies.
305 */
306 if (majdev == FDMAJOR) {
307 slice = COMPATIBILITY_SLICE;
308 part = RAW_PART;
309 mindev = unit << FDUNITSHIFT;
310 } else {
311 part = B_PARTITION(bootdev);
312 mindev = dkmakeminor(unit, slice, part);
313 }
314
315 newrootdev = makebdev(majdev, mindev);
316 sname = dsname(newrootdev, unit, slice, part, partname);
317 rootdevnames[0] = malloc(strlen(sname) + 6, M_DEVBUF, M_NOWAIT);
318 sprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
319
320 /*
321 * For properly dangerously dedicated disks (ones with a historical
322 * bogus partition table), the boot blocks will give slice = 4, but
323 * the kernel will only provide the compatibility slice since it
324 * knows that slice 4 is not a real slice. Arrange to try mounting
325 * the compatibility slice as root if mounting the slice passed by
326 * the boot blocks fails. This handles the dangerously dedicated
327 * case and perhaps others.
328 */
329 if (slice == COMPATIBILITY_SLICE)
330 return;
331 slice = COMPATIBILITY_SLICE;
332 sname = dsname(newrootdev, unit, slice, part, partname);
333 rootdevnames[1] = malloc(strlen(sname) + 6, M_DEVBUF, M_NOWAIT);
334 sprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
335}
336#endif
337
338#if defined(NFS) && defined(NFS_ROOT)
339
340#include <sys/socket.h>
341#include <net/if.h>
342#include <net/if_dl.h>
343#include <net/if_types.h>
344#include <net/if_var.h>
345#include <net/ethernet.h>
346#include <netinet/in.h>
347#include <nfs/rpcv2.h>
348#include <nfs/nfsproto.h>
349#include <nfs/nfs.h>
350#include <nfs/nfsdiskless.h>
351
352extern struct nfs_diskless nfs_diskless;
353
354static int
355inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
356{
357 u_int32_t a[4];
358 char *cp;
359
360 bzero(sa, sizeof(*sa));
361 sa->sin_len = sizeof(*sa);
362 sa->sin_family = AF_INET;
363
364 if ((cp = getenv(ev)) == NULL)
365 return(1);
366 if (sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
367 return(1);
368 /* XXX is this ordering correct? */
369 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
370 return(0);
371}
372
373static int
374hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
375{
376 char *cp;
377 u_int32_t a[6];
378
379 bzero(sa, sizeof(*sa));
380 sa->sdl_len = sizeof(*sa);
381 sa->sdl_family = AF_LINK;
382 sa->sdl_type = IFT_ETHER;
383 sa->sdl_alen = ETHER_ADDR_LEN;
384 if ((cp = getenv(ev)) == NULL)
385 return(1);
386 if (sscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
387 return(1);
388 sa->sdl_data[0] = a[0];
389 sa->sdl_data[1] = a[1];
390 sa->sdl_data[2] = a[2];
391 sa->sdl_data[3] = a[3];
392 sa->sdl_data[4] = a[4];
393 sa->sdl_data[5] = a[5];
394 return(0);
395}
396
397static int
398decode_nfshandle(char *ev, u_char *fh)
399{
400 u_char *cp;
401 int len, val;
402
403 if (((cp = getenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
404 return(0);
405 len = 0;
406 cp++;
407 for (;;) {
408 if (*cp == 'X')
409 return(len);
410 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff))
411 return(0);
412 *(fh++) = val;
413 len++;
414 cp += 2;
415 if (len > NFSX_V2FH)
416 return(0);
417 }
418}
419
420/*
421 * Populate the essential fields in the nfsv3_diskless structure.
422 *
423 * The loader is expected to export the following environment variables:
424 *
425 * boot.netif.ip IP address on boot interface
426 * boot.netif.netmask netmask on boot interface
427 * boot.netif.gateway default gateway (optional)
428 * boot.netif.hwaddr hardware address of boot interface
429 * boot.nfsroot.server IP address of root filesystem server
430 * boot.nfsroot.path path of the root filesystem on server
431 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
432 */
433static void
434pxe_setup_nfsdiskless()
435{
436 struct nfs_diskless *nd = &nfs_diskless;
437 struct ifnet *ifp;
438 struct ifaddr *ifa;
439 struct sockaddr_dl *sdl, ourdl;
440 struct sockaddr_in myaddr, netmask;
441 char *cp;
442
443 /* set up interface */
444 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
445 return;
446 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
447 printf("PXE: no netmask\n");
448 return;
449 }
450 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
451 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
452 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
453 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
454 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
455
456 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
457 printf("PXE: no hardware address\n");
458 return;
459 }
460 ifa = NULL;
461 ifp = TAILQ_FIRST(&ifnet);
462 TAILQ_FOREACH(ifp, &ifnet, if_link) {
463 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
464 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
465 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
466 if ((sdl->sdl_type == ourdl.sdl_type) &&
467 (sdl->sdl_alen == ourdl.sdl_alen) &&
468 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
469 ourdl.sdl_data + ourdl.sdl_nlen,
470 sdl->sdl_alen))
471 goto match_done;
472 }
473 }
474 }
475 printf("PXE: no interface\n");
476 return; /* no matching interface */
477match_done:
478 sprintf(nd->myif.ifra_name, "%s%d", ifp->if_name, ifp->if_unit);
479
480
481 /* set up gateway */
482 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
483
484 /* XXX set up swap? */
485
486 /* set up root mount */
487 nd->root_args.rsize = 8192; /* XXX tunable? */
488 nd->root_args.wsize = 8192;
489 nd->root_args.sotype = SOCK_DGRAM;
490 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
491 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
492 printf("PXE: no server\n");
493 return;
494 }
495 nd->root_saddr.sin_port = htons(NFS_PORT);
496 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
497 printf("PXE: no NFS handle\n");
498 return;
499 }
500 if ((cp = getenv("boot.nfsroot.path")) != NULL)
501 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
502
503 nfs_diskless_valid = 1;
504}
505#endif