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
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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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(NFS) && defined(NFS_ROOT)
94 #if !defined(BOOTP_NFSROOT)
95 static void pxe_setup_nfsdiskless(void);
99 SYSINIT(cpu, SI_BOOT2_START_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
100 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
101 /* SI_ORDER_SECOND is hookable */
102 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
103 /* SI_ORDER_MIDDLE is hookable */
104 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
106 cdev_t rootdev = NULL;
107 cdev_t dumpdev = NULL;
110 * nfsroot.iosize may be set in loader.conf, 32768 is recommended to
111 * be able to max-out a GigE link if the server supports it. Many servers
112 * do not so the default is 8192.
114 * nfsroot.rahead defaults to something reasonable, can be overridden.
116 static int nfsroot_iosize = 8192;
117 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize);
118 static int nfsroot_rahead = 4;
119 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead);
125 cpu_startup(void *dummy)
127 vm_offset_t buffer_sva;
128 vm_offset_t buffer_eva;
129 vm_offset_t pager_sva;
130 vm_offset_t pager_eva;
132 kprintf("%s", version);
133 kprintf("real memory = %ju (%juK bytes)\n",
134 (uintmax_t)ptoa(Maxmem), (uintmax_t)(ptoa(Maxmem) / 1024));
137 int factor = 4 * NBUFCALCSIZE / 1024;
138 int kbytes = Maxmem * (PAGE_SIZE / 1024);
142 nbuf += min((kbytes - 4096) / factor, 65536 / factor);
144 nbuf += (kbytes - 65536) * 2 / (factor * 5);
145 if (maxbcache && nbuf > maxbcache / NBUFCALCSIZE)
146 nbuf = maxbcache / NBUFCALCSIZE;
148 if (nbuf > (virtual_end - virtual_start) / (MAXBSIZE * 2)) {
149 nbuf = (virtual_end - virtual_start) / (MAXBSIZE * 2);
150 kprintf("Warning: nbufs capped at %ld\n", nbuf);
153 nswbuf_mem = lmax(lmin(nbuf / 32, 32), 4);
155 if (nswbuf_mem < NSWBUF_MIN)
156 nswbuf_mem = NSWBUF_MIN;
158 nswbuf_kva = lmax(lmin(nbuf / 4, 256), 16);
160 if (nswbuf_kva < NSWBUF_MIN)
161 nswbuf_kva = NSWBUF_MIN;
165 * Allocate memory for the buffer cache
167 buf = (void *)kmem_alloc(&kernel_map,
168 nbuf * sizeof(struct buf),
170 swbuf_mem = (void *)kmem_alloc(&kernel_map,
171 nswbuf_mem * sizeof(struct buf),
173 swbuf_kva = (void *)kmem_alloc(&kernel_map,
174 nswbuf_kva * sizeof(struct buf),
177 kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
178 (nbuf * MAXBSIZE * 2) +
179 (nswbuf_mem + nswbuf_kva) *MAXPHYS +
181 kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
182 (nbuf * MAXBSIZE * 2));
183 buffer_map.system_map = 1;
184 kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
185 (nswbuf_mem + nswbuf_kva) *MAXPHYS +
187 pager_map.system_map = 1;
188 kprintf("avail memory = %lu (%luK bytes)\n", ptoa(vmstats.v_free_count),
189 ptoa(vmstats.v_free_count) / 1024);
196 * Determine i/o configuration for a machine.
199 configure_first(void *dummy)
204 configure(void *dummy)
207 * Final interrupt support acviation, then enable hardware interrupts.
209 MachIntrABI.finalize();
213 * This will configure all devices, generally starting with the
214 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly
215 * dummies up the attach in order to delay legacy initialization
216 * until after all other busses/subsystems have had a chance
217 * at those resources.
219 root_bus_configure();
223 * Explicitly probe and attach ISA last. The isa bus saves
224 * it's device node at attach time for us here.
227 isa_probe_children(isa_bus_device);
231 * Allow lowering of the ipl to the lowest kernel level if we
232 * panic (or call tsleep() before clearing `cold'). No level is
233 * completely safe (since a panic may occur in a critical region
234 * at splhigh()), but we want at least bio interrupts to work.
236 safepri = TDPRI_KERN_USER;
240 configure_final(void *dummy)
245 kprintf("Device configuration finished.\n");
249 void bootpc_init(void);
252 * Do legacy root filesystem discovery.
260 #if defined(NFS) && defined(NFS_ROOT)
261 #if !defined(BOOTP_NFSROOT)
262 pxe_setup_nfsdiskless();
263 if (nfs_diskless_valid)
265 rootdevnames[0] = "nfs:";
268 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL);
270 #if defined(NFS) && defined(NFS_ROOT)
271 #if !defined(BOOTP_NFSROOT)
273 #include <sys/socket.h>
275 #include <net/if_dl.h>
276 #include <net/if_types.h>
277 #include <net/if_var.h>
278 #include <net/ethernet.h>
279 #include <netinet/in.h>
280 #include <vfs/nfs/rpcv2.h>
281 #include <vfs/nfs/nfsproto.h>
282 #include <vfs/nfs/nfs.h>
283 #include <vfs/nfs/nfsdiskless.h>
285 extern struct nfs_diskless nfs_diskless;
288 * Convert a kenv variable to a sockaddr. If the kenv variable does not
289 * exist the sockaddr will remain zerod out (callers typically just check
290 * sin_len). A network address of 0.0.0.0 is equivalent to failure.
293 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
298 bzero(sa, sizeof(*sa));
300 if ((cp = kgetenv(ev)) == NULL)
302 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
304 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
306 /* XXX is this ordering correct? */
307 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
308 sa->sin_len = sizeof(*sa);
309 sa->sin_family = AF_INET;
314 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
319 bzero(sa, sizeof(*sa));
320 sa->sdl_len = sizeof(*sa);
321 sa->sdl_family = AF_LINK;
322 sa->sdl_type = IFT_ETHER;
323 sa->sdl_alen = ETHER_ADDR_LEN;
324 if ((cp = kgetenv(ev)) == NULL)
326 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
328 sa->sdl_data[0] = a[0];
329 sa->sdl_data[1] = a[1];
330 sa->sdl_data[2] = a[2];
331 sa->sdl_data[3] = a[3];
332 sa->sdl_data[4] = a[4];
333 sa->sdl_data[5] = a[5];
338 decode_nfshandle(char *ev, u_char *fh)
343 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
350 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
361 * Populate the essential fields in the nfsv3_diskless structure.
363 * The loader is expected to export the following environment variables:
365 * boot.netif.ip IP address on boot interface
366 * boot.netif.netmask netmask on boot interface
367 * boot.netif.gateway default gateway (optional)
368 * boot.netif.hwaddr hardware address of boot interface
369 * boot.netif.name name of boot interface (instead of hw addr)
370 * boot.nfsroot.server IP address of root filesystem server
371 * boot.nfsroot.path path of the root filesystem on server
372 * boot.nfsroot.nfshandle NFS handle for root filesystem on server
375 pxe_setup_nfsdiskless(void)
377 struct nfs_diskless *nd = &nfs_diskless;
380 struct sockaddr_dl *sdl, ourdl;
381 struct sockaddr_in myaddr, netmask;
384 /* set up interface */
385 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
387 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
388 kprintf("PXE: no netmask\n");
391 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
392 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
393 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
394 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
395 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
397 if ((cp = kgetenv("boot.netif.name")) != NULL) {
401 strlcpy(nd->myif.ifra_name, ifp->if_xname,
402 sizeof(nd->myif.ifra_name));
407 kprintf("PXE: cannot find interface %s\n", cp);
411 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
412 kprintf("PXE: no hardware address\n");
417 TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
418 struct ifaddr_container *ifac;
420 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
423 if ((ifa->ifa_addr->sa_family == AF_LINK) &&
424 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
425 if ((sdl->sdl_type == ourdl.sdl_type) &&
426 (sdl->sdl_alen == ourdl.sdl_alen) &&
427 !bcmp(sdl->sdl_data + sdl->sdl_nlen,
428 ourdl.sdl_data + ourdl.sdl_nlen,
430 strlcpy(nd->myif.ifra_name,
432 sizeof(nd->myif.ifra_name));
440 kprintf("PXE: no interface\n");
441 return; /* no matching interface */
444 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
446 /* XXX set up swap? */
448 /* set up root mount */
449 nd->root_args.rsize = nfsroot_iosize;
450 nd->root_args.wsize = nfsroot_iosize;
451 nd->root_args.sotype = SOCK_STREAM;
452 nd->root_args.readahead = nfsroot_rahead;
453 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT |
455 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
456 kprintf("PXE: no server\n");
459 nd->root_saddr.sin_port = htons(NFS_PORT);
462 * A tftp-only loader may pass NFS path information without a
463 * root handle. Generate a warning but continue configuring.
465 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
466 kprintf("PXE: Warning, no NFS handle passed from loader\n");
468 if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
469 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
471 nfs_diskless_valid = 1;