FreeBSD/Linux Kernel Cross Reference
sys/x86/x86/autoconf.c

     /*-
      * Copyright (c) 1990 The Regents of the University of California.
      * All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * William Jolitz.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      from: @(#)autoconf.c    7.1 (Berkeley) 5/9/91
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /*
     * Setup the system to run on the current machine.
     *
     * Configure() is called at boot time and initializes the vba
     * device tables and the memory controller monitoring.  Available
     * devices are determined (from possibilities mentioned in ioconf.c),
     * and the drivers are initialized.
     */
    #include "opt_bootp.h"
    #include "opt_isa.h"
    #include "opt_bus.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/conf.h>
    #include <sys/reboot.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/mount.h>
    #include <sys/cons.h>
    
    #include <sys/socket.h>
    #include <net/if.h>
    #include <net/if_dl.h>
    #include <net/if_types.h>
    #include <net/if_var.h>
    #include <net/ethernet.h>
    #include <netinet/in.h>
    
    #ifdef PC98
    #include <machine/bootinfo.h>
    #endif
    #include <machine/md_var.h>
    
    #ifdef DEV_ISA
    #include <isa/isavar.h>
    
    device_t isa_bus_device = 0;
    #endif
    
    static void     configure_first(void *);
    static void     configure(void *);
    static void     configure_final(void *);
    
    SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
    /* SI_ORDER_SECOND is hookable */
    SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
    /* SI_ORDER_MIDDLE is hookable */
    SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
    
    /*
     * Determine i/o configuration for a machine.
     */
    static void
    configure_first(void *dummy)
    {
    
            /* nexus0 is the top of the x86 device tree */
            device_add_child(root_bus, "nexus", 0);
    }
    
   static void
   configure(void *dummy)
   {
   
           /* initialize new bus architecture */
           root_bus_configure();
   
   #ifdef DEV_ISA
           /*
            * Explicitly probe and attach ISA last.  The isa bus saves
            * it's device node at attach time for us here.
            */
           if (isa_bus_device)
                   isa_probe_children(isa_bus_device);
   #endif
   }
   
   static void
   configure_final(void *dummy)
   {
   
           cninit_finish(); 
   
           if (bootverbose) {
   #ifdef PC98
                   int i;
   
                   /*
                    * Print out the BIOS's idea of the disk geometries.
                    */
                   printf("BIOS Geometries:\n");
                   for (i = 0; i < N_BIOS_GEOM; i++) {
                           unsigned long bios_geom;
                           int max_cylinder, max_head, max_sector;
   
                           bios_geom = bootinfo.bi_bios_geom[i];
   
                           /*
                            * XXX the bootstrap punts a 1200K floppy geometry
                            * when the get-disk-geometry interrupt fails.  Skip
                            * drives that have this geometry.
                            */
                           if (bios_geom == 0x4f020f)
                                   continue;
   
                           printf(" %x:%08lx ", i, bios_geom);
                           max_cylinder = bios_geom >> 16;
                           max_head = (bios_geom >> 8) & 0xff;
                           max_sector = bios_geom & 0xff;
                           printf(
                   "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
                                  max_cylinder, max_cylinder + 1,
                                  max_head, max_head + 1,
                                  max_sector, max_sector);
                   }
                   printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
   #endif
   
                   printf("Device configuration finished.\n");
           }
           cold = 0;
   }

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