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  * 4. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  *      from: @(#)autoconf.c    7.1 (Berkeley) 5/9/91
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD: releng/9.0/sys/i386/i386/autoconf.c 146794 2005-05-29 23:44:22Z marcel $");
   37 
   38 /*
   39  * Setup the system to run on the current machine.
   40  *
   41  * Configure() is called at boot time and initializes the vba
   42  * device tables and the memory controller monitoring.  Available
   43  * devices are determined (from possibilities mentioned in ioconf.c),
   44  * and the drivers are initialized.
   45  */
   46 #include "opt_bootp.h"
   47 #include "opt_isa.h"
   48 #include "opt_bus.h"
   49 
   50 #include <sys/param.h>
   51 #include <sys/systm.h>
   52 #include <sys/bus.h>
   53 #include <sys/conf.h>
   54 #include <sys/reboot.h>
   55 #include <sys/kernel.h>
   56 #include <sys/malloc.h>
   57 #include <sys/mount.h>
   58 #include <sys/cons.h>
   59 
   60 #include <sys/socket.h>
   61 #include <net/if.h>
   62 #include <net/if_dl.h>
   63 #include <net/if_types.h>
   64 #include <net/if_var.h>
   65 #include <net/ethernet.h>
   66 #include <netinet/in.h>
   67 
   68 #include <machine/bootinfo.h>
   69 #include <machine/md_var.h>
   70 
   71 #ifdef DEV_ISA
   72 #include <isa/isavar.h>
   73 
   74 device_t isa_bus_device = 0;
   75 #endif
   76 
   77 static void     configure_first(void *);
   78 static void     configure(void *);
   79 static void     configure_final(void *);
   80 
   81 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
   82 /* SI_ORDER_SECOND is hookable */
   83 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
   84 /* SI_ORDER_MIDDLE is hookable */
   85 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
   86 
   87 /*
   88  * Determine i/o configuration for a machine.
   89  */
   90 static void
   91 configure_first(dummy)
   92         void *dummy;
   93 {
   94 
   95         /* nexus0 is the top of the i386 device tree */
   96         device_add_child(root_bus, "nexus", 0);
   97 }
   98 
   99 static void
  100 configure(dummy)
  101         void *dummy;
  102 {
  103 
  104         /*
  105          * Enable interrupts on the processor.  The interrupts are still
  106          * disabled in the interrupt controllers until interrupt handlers
  107          * are registered.
  108          */
  109         enable_intr();
  110 
  111         /* initialize new bus architecture */
  112         root_bus_configure();
  113 
  114 #ifdef DEV_ISA
  115         /*
  116          * Explicitly probe and attach ISA last.  The isa bus saves
  117          * it's device node at attach time for us here.
  118          */
  119         if (isa_bus_device)
  120                 isa_probe_children(isa_bus_device);
  121 #endif
  122 }
  123 
  124 static void
  125 configure_final(dummy)
  126         void *dummy;
  127 {
  128 
  129         cninit_finish(); 
  130 
  131         if (bootverbose) {
  132 #ifdef PC98
  133                 int i;
  134 
  135                 /*
  136                  * Print out the BIOS's idea of the disk geometries.
  137                  */
  138                 printf("BIOS Geometries:\n");
  139                 for (i = 0; i < N_BIOS_GEOM; i++) {
  140                         unsigned long bios_geom;
  141                         int max_cylinder, max_head, max_sector;
  142 
  143                         bios_geom = bootinfo.bi_bios_geom[i];
  144 
  145                         /*
  146                          * XXX the bootstrap punts a 1200K floppy geometry
  147                          * when the get-disk-geometry interrupt fails.  Skip
  148                          * drives that have this geometry.
  149                          */
  150                         if (bios_geom == 0x4f020f)
  151                                 continue;
  152 
  153                         printf(" %x:%08lx ", i, bios_geom);
  154                         max_cylinder = bios_geom >> 16;
  155                         max_head = (bios_geom >> 8) & 0xff;
  156                         max_sector = bios_geom & 0xff;
  157                         printf(
  158                 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
  159                                max_cylinder, max_cylinder + 1,
  160                                max_head, max_head + 1,
  161                                max_sector, max_sector);
  162                 }
  163                 printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
  164 #endif
  165 
  166                 printf("Device configuration finished.\n");
  167         }
  168         cold = 0;
  169 }

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