sys/arch/evbppc/pmppc/autoconf.c

   1 /*      $NetBSD: autoconf.c,v 1.4 2008/02/12 17:30:57 joerg Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * William Jolitz.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)autoconf.c  7.1 (Berkeley) 5/9/91
  35  */
  36
  37 /*
  38  * Setup the system to run on the current machine.
  39  *
  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.
  44  */
  45
  46 #include <sys/cdefs.h>
  47 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.4 2008/02/12 17:30:57 joerg Exp $");
  48
  49 #include <sys/param.h>
  50 #include <sys/systm.h>
  51 #include <sys/buf.h>
  52 #include <sys/disklabel.h>
  53 #include <sys/conf.h>
  54 #include <sys/reboot.h>
  55 #include <sys/device.h>
  56
  57 #include <powerpc/pte.h>
  58
  59 void findroot(void);
  60 void disable_intr(void);
  61 void enable_intr(void);
  62
  63 /*
  64  * Determine i/o configuration for a machine.
  65  */
  66 void
  67 cpu_configure(void)
  68 {
  69
  70         if (config_rootfound("mainbus", NULL) == NULL)
  71                 panic("configure: mainbus not configured");
  72
  73         genppc_cpu_configure();
  74 }
  75
  76 void
  77 cpu_rootconf(void)
  78 {
  79         findroot();
  80
  81         printf("boot device: %s\n",
  82             booted_device ? booted_device->dv_xname : "<unknown>");
  83
  84         setroot(booted_device, booted_partition);
  85 }
  86
  87 u_long  bootdev = 0;            /* should be dev_t, but not until 32 bits */
  88
  89 /* XXX remove? */
  90 /*
  91  * Attempt to find the device from which we were booted.
  92  * If we can do so, and not instructed not to do so,
  93  * change rootdev to correspond to the load device.
  94  */
  95 void
  96 findroot(void)
  97 {
  98         int unit, part;
  99         device_t dv;
 100         const char *name;
 101
 102 #if 0
 103         printf("howto %x bootdev %x ", boothowto, bootdev);
 104 #endif
 105
 106         if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
 107                 return;
 108
 109         name = devsw_blk2name((bootdev >> B_TYPESHIFT) & B_TYPEMASK);
 110         if (name == NULL)
 111                 return;
 112
 113         part = (bootdev >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
 114         unit = (bootdev >> B_UNITSHIFT) & B_UNITMASK;
 115
 116         if ((dv = device_find_by_driver_unit(name, unit)) != NULL) {
 117                 booted_device = dv;
 118                 booted_partition = part;
 119         }
 120 }
 121
 122 void
 123 device_register(device_t dev, void *aux)
 124 {
 125         /* do nothing */
 126 }