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/swapgeneric.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
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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: @(#)swapgeneric.c 5.5 (Berkeley) 5/9/91
   37  * $FreeBSD$
   38  */
   39 
   40 #include <sys/param.h>
   41 #include <sys/conf.h>
   42 #include <sys/buf.h>
   43 #include <sys/mount.h>
   44 #include <sys/systm.h>
   45 #include <sys/reboot.h>
   46 #include <sys/disklabel.h>
   47 #include <sys/kernel.h>
   48 
   49 #include <i386/i386/cons.h>
   50 #include <machine/md_var.h>
   51 
   52 #include "wd.h"
   53 #include "fd.h"
   54 #include "cd.h"
   55 #include "da.h"
   56 #include "mcd.h"
   57 #include "scd.h"
   58 #include "matcd.h"
   59 
   60 /*
   61  * Generic configuration;  all in one
   62  */
   63 dev_t   rootdev = NODEV;
   64 dev_t   dumpdev = NODEV;
   65 
   66 void gets __P((char *));
   67 
   68 struct  genericconf {
   69         char    *gc_name;
   70         dev_t   gc_root;
   71 } genericconf[] = {
   72 #if NWD > 0
   73         { "wd",         makedev(0, 0x00000000), },
   74 #endif
   75 #if NFD > 0
   76         { "fd",         makedev(2, 0x00000000), },
   77 #endif
   78 #if NCD > 0
   79         { "cd",         makedev(6, 0x00000000), },
   80 #endif
   81 #if NDA > 0
   82         { "da",         makedev(4, 0x00000000), },
   83 #endif
   84 #if NMCD > 0
   85         { "mcd",        makedev(7, 0x00000000), },
   86 #endif
   87 #if NSCD > 0
   88         { "scd",        makedev(16,0x00000000), },
   89 #endif
   90 #if NMATCD > 0
   91         { "matcd",      makedev(17,0x00000000), },
   92 #endif
   93         { 0 },
   94 };
   95 
   96 void setconf(void)
   97 {
   98         register struct genericconf *gc;
   99         int bd;
  100         int unit, swaponroot = 0;
  101 
  102         if (rootdev != NODEV)
  103                 return;
  104         if (boothowto & RB_ASKNAME) {
  105                 char name[128];
  106 retry:
  107                 printf("root device? ");
  108                 gets(name);
  109                 for (gc = genericconf; gc->gc_name; gc++)
  110                         if (gc->gc_name[0] == name[0] &&
  111                             gc->gc_name[1] == name[1])
  112                                 goto gotit;
  113                 goto bad;
  114 gotit:
  115                 if (name[3] == '*') {
  116                         name[3] = name[4];
  117                         swaponroot++;
  118                 }
  119                 if (name[2] >= '' && name[2] <= '7' && name[3] == 0) {
  120                         unit = name[2] - '';
  121                         goto found;
  122                 }
  123                 printf("bad/missing unit number\n");
  124 bad:
  125                 printf("use dk%%d\n");
  126                 goto retry;
  127         }
  128         /* XXX */
  129         if (strcmp(mountrootfsname, "nfs") == 0) {
  130                 /*
  131                  * The NFS code in nfs_vfsops.c handles root and swap
  132                  * for us if we're booting diskless. This is just to
  133                  * make swapconf() happy.
  134                  */
  135                 dumplo = -1;
  136                 return;
  137         }
  138         unit = 0;
  139         for (gc = genericconf; gc->gc_name; gc++) {
  140                 for (bd = 0; bd < nblkdev; bd++) {
  141                         if (bdevsw[bd] != NULL &&
  142                             strcmp(bdevsw[bd]->d_name, gc->gc_name) == 0) {
  143                                 printf("root on %s0\n", bdevsw[bd]->d_name);
  144                                 goto found;
  145                         }
  146                 }
  147         }
  148         printf("no suitable root -- press any key to reboot\n\n");
  149         cngetc();
  150         cpu_reset();
  151         for(;;) ;
  152 found:
  153         gc->gc_root = makedev(major(gc->gc_root), unit * MAXPARTITIONS);
  154         rootdev = gc->gc_root;
  155 }
  156 
  157 void gets(cp)
  158         char *cp;
  159 {
  160         register char *lp;
  161         register int c;
  162 
  163         lp = cp;
  164         for (;;) {
  165                 printf("%c", c = cngetc()&0177);
  166                 switch (c) {
  167                 case -1:
  168                 case '\n':
  169                 case '\r':
  170                         *lp++ = '\0';
  171                         return;
  172                 case '\b':
  173                 case '\177':
  174                         if (lp > cp) {
  175                                 printf(" \b");
  176                                 lp--;
  177                         }
  178                         continue;
  179                 case '#':
  180                         lp--;
  181                         if (lp < cp)
  182                                 lp = cp;
  183                         continue;
  184                 case '@':
  185                 case 'u'&037:
  186                         lp = cp;
  187                         printf("%c", '\n');
  188                         continue;
  189                 default:
  190                         *lp++ = c;
  191                 }
  192         }
  193 }

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