The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/i386/autoconf.c

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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  */
   38 
   39 #include <sys/cdefs.h>
   40 __FBSDID("$FreeBSD: releng/5.2/sys/i386/i386/autoconf.c 121994 2003-11-03 22:20:50Z jhb $");
   41 
   42 /*
   43  * Setup the system to run on the current machine.
   44  *
   45  * Configure() is called at boot time and initializes the vba
   46  * device tables and the memory controller monitoring.  Available
   47  * devices are determined (from possibilities mentioned in ioconf.c),
   48  * and the drivers are initialized.
   49  */
   50 #include "opt_bootp.h"
   51 #include "opt_isa.h"
   52 #include "opt_nfs.h"
   53 #include "opt_nfsroot.h"
   54 #include "opt_bus.h"
   55 
   56 #include <sys/param.h>
   57 #include <sys/systm.h>
   58 #include <sys/bus.h>
   59 #include <sys/conf.h>
   60 #include <sys/reboot.h>
   61 #include <sys/kernel.h>
   62 #include <sys/malloc.h>
   63 #include <sys/mount.h>
   64 #include <sys/cons.h>
   65 
   66 #include <sys/socket.h>
   67 #include <net/if.h>
   68 #include <net/if_dl.h>
   69 #include <net/if_types.h>
   70 #include <net/if_var.h>
   71 #include <net/ethernet.h>
   72 #include <netinet/in.h>
   73 #include <nfs/rpcv2.h>
   74 #include <nfs/nfsproto.h>
   75 #include <nfsclient/nfs.h>
   76 #include <nfsclient/nfsdiskless.h>
   77 
   78 #include <machine/bootinfo.h>
   79 #include <machine/md_var.h>
   80 
   81 #ifdef DEV_ISA
   82 #include <isa/isavar.h>
   83 
   84 device_t isa_bus_device = 0;
   85 #endif
   86 
   87 static void     configure_first(void *);
   88 static void     configure(void *);
   89 static void     configure_final(void *);
   90 
   91 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
   92 /* SI_ORDER_SECOND is hookable */
   93 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
   94 /* SI_ORDER_MIDDLE is hookable */
   95 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
   96 
   97 /*
   98  * Determine i/o configuration for a machine.
   99  */
  100 static void
  101 configure_first(dummy)
  102         void *dummy;
  103 {
  104 }
  105 
  106 static void
  107 configure(dummy)
  108         void *dummy;
  109 {
  110 
  111         /*
  112          * Enable interrupts on the processor.  The interrupts are still
  113          * disabled in the interrupt controllers until interrupt handlers
  114          * are registered.
  115          */
  116         enable_intr();
  117 
  118         /* nexus0 is the top of the i386 device tree */
  119         device_add_child(root_bus, "nexus", 0);
  120 
  121         /* initialize new bus architecture */
  122         root_bus_configure();
  123 
  124 #ifdef DEV_ISA
  125         /*
  126          * Explicitly probe and attach ISA last.  The isa bus saves
  127          * it's device node at attach time for us here.
  128          */
  129         if (isa_bus_device)
  130                 isa_probe_children(isa_bus_device);
  131 #endif
  132 }
  133 
  134 static void
  135 configure_final(dummy)
  136         void *dummy;
  137 {
  138 
  139         cninit_finish(); 
  140 
  141         if (bootverbose) {
  142 #ifdef PC98
  143                 {
  144                 int i;
  145                 /*
  146                  * Print out the BIOS's idea of the disk geometries.
  147                  */
  148                 printf("BIOS Geometries:\n");
  149                 for (i = 0; i < N_BIOS_GEOM; i++) {
  150                         unsigned long bios_geom;
  151                         int max_cylinder, max_head, max_sector;
  152 
  153                         bios_geom = bootinfo.bi_bios_geom[i];
  154 
  155                         /*
  156                          * XXX the bootstrap punts a 1200K floppy geometry
  157                          * when the get-disk-geometry interrupt fails.  Skip
  158                          * drives that have this geometry.
  159                          */
  160                         if (bios_geom == 0x4f010f)
  161                                 continue;
  162 
  163                         printf(" %x:%08lx ", i, bios_geom);
  164                         max_cylinder = bios_geom >> 16;
  165                         max_head = (bios_geom >> 8) & 0xff;
  166                         max_sector = bios_geom & 0xff;
  167                         printf(
  168                 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
  169                                max_cylinder, max_cylinder + 1,
  170                                max_head, max_head + 1,
  171                                max_sector, max_sector);
  172                 }
  173                 printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
  174                 }
  175 #endif
  176 
  177                 printf("Device configuration finished.\n");
  178         }
  179         cold = 0;
  180 }
  181 
  182 /*
  183  * Do legacy root filesystem discovery.
  184  */
  185 void
  186 cpu_rootconf()
  187 {
  188 #ifdef BOOTP
  189         bootpc_init();
  190 #endif
  191 #if defined(NFSCLIENT) && defined(NFS_ROOT)
  192 #if !defined(BOOTP_NFSROOT)
  193         nfs_setup_diskless();
  194         if (nfs_diskless_valid)
  195 #endif
  196                 rootdevnames[0] = "nfs:";
  197 #endif
  198 }
  199 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)

Cache object: 444aa15d42219713212e406d0a785ac6


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