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/amd64/amd64/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  * $FreeBSD: releng/5.1/sys/amd64/amd64/autoconf.c 114349 2003-05-01 01:05:25Z peter $
   38  */
   39 
   40 /*
   41  * Setup the system to run on the current machine.
   42  *
   43  * Configure() is called at boot time and initializes the vba
   44  * device tables and the memory controller monitoring.  Available
   45  * devices are determined (from possibilities mentioned in ioconf.c),
   46  * and the drivers are initialized.
   47  */
   48 #include "opt_bootp.h"
   49 #include "opt_isa.h"
   50 #include "opt_nfs.h"
   51 #include "opt_nfsroot.h"
   52 #include "opt_bus.h"
   53 
   54 #include <sys/param.h>
   55 #include <sys/systm.h>
   56 #include <sys/bus.h>
   57 #include <sys/conf.h>
   58 #include <sys/reboot.h>
   59 #include <sys/kernel.h>
   60 #include <sys/malloc.h>
   61 #include <sys/mount.h>
   62 #include <sys/cons.h>
   63 
   64 #include <sys/socket.h>
   65 #include <net/if.h>
   66 #include <net/if_dl.h>
   67 #include <net/if_types.h>
   68 #include <net/if_var.h>
   69 #include <net/ethernet.h>
   70 #include <netinet/in.h>
   71 #include <nfs/rpcv2.h>
   72 #include <nfs/nfsproto.h>
   73 #include <nfsclient/nfs.h>
   74 #include <nfsclient/nfsdiskless.h>
   75 
   76 #include <machine/md_var.h>
   77 #include <amd64/isa/icu.h>
   78 
   79 #ifdef DEV_ISA
   80 #include <isa/isavar.h>
   81 
   82 device_t isa_bus_device = 0;
   83 #endif
   84 
   85 static void     configure_first(void *);
   86 static void     configure(void *);
   87 static void     configure_final(void *);
   88 
   89 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
   90 /* SI_ORDER_SECOND is hookable */
   91 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
   92 /* SI_ORDER_MIDDLE is hookable */
   93 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
   94 
   95 /*
   96  * Determine i/o configuration for a machine.
   97  */
   98 static void
   99 configure_first(dummy)
  100         void *dummy;
  101 {
  102 }
  103 
  104 static void
  105 configure(dummy)
  106         void *dummy;
  107 {
  108 
  109         /*
  110          * Activate the ICU's.  Note that we are explicitly at splhigh()
  111          * at present as we have no way to disable stray PCI level triggered
  112          * interrupts until the devices have had a driver attached.  This
  113          * is particularly a problem when the interrupts are shared.  For
  114          * example, if IRQ 10 is shared between a disk and network device
  115          * and the disk device generates an interrupt, if we "activate"
  116          * IRQ 10 when the network driver is set up, then we will get
  117          * recursive interrupt 10's as nothing will know how to turn off
  118          * the disk device's interrupt.
  119          *
  120          * Having the ICU's active means we can probe interrupt routing to
  121          * see if a device causes the corresponding pending bit to be set.
  122          *
  123          * This is all rather inconvenient.
  124          */
  125         enable_intr();
  126         INTREN(IRQ_SLAVE);
  127 
  128         /* nexus0 is the top of the i386 device tree */
  129         device_add_child(root_bus, "nexus", 0);
  130 
  131         /* initialize new bus architecture */
  132         root_bus_configure();
  133 
  134 #ifdef DEV_ISA
  135         /*
  136          * Explicitly probe and attach ISA last.  The isa bus saves
  137          * it's device node at attach time for us here.
  138          */
  139         if (isa_bus_device)
  140                 isa_probe_children(isa_bus_device);
  141 #endif
  142 
  143         /*
  144          * Now we're ready to handle (pending) interrupts.
  145          * XXX this is slightly misplaced.
  146          */
  147         spl0();
  148 }
  149 
  150 static void
  151 configure_final(dummy)
  152         void *dummy;
  153 {
  154 
  155         cninit_finish(); 
  156         cold = 0;
  157 }
  158 
  159 /*
  160  * Do legacy root filesystem discovery.
  161  */
  162 void
  163 cpu_rootconf()
  164 {
  165 #ifdef BOOTP
  166         bootpc_init();
  167 #endif
  168 #if defined(NFSCLIENT) && defined(NFS_ROOT)
  169 #if !defined(BOOTP_NFSROOT)
  170         nfs_setup_diskless();
  171         if (nfs_diskless_valid)
  172 #endif
  173                 rootdevnames[0] = "nfs:";
  174 #endif
  175 }
  176 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)

Cache object: f9ecd5c32880cee4ef9f8a9b993813d3


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