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

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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: src/sys/i386/i386/swapgeneric.c,v 1.17.2.2 1999/09/05 08:11:16 peter Exp $
   38  */
   39 
   40 #include <sys/param.h>
   41 #include <sys/conf.h>
   42 #include <sys/buf.h>
   43 #include <sys/systm.h>
   44 #include <sys/reboot.h>
   45 #include <sys/disklabel.h>
   46 #include <sys/kernel.h>
   47 
   48 #include <i386/i386/cons.h>
   49 #include <machine/md_var.h>
   50 
   51 #include "wd.h"
   52 #include "fd.h"
   53 #include "sd.h"
   54 #include "vn.h"
   55 #include "cd.h"
   56 #include "mcd.h"
   57 #include "scd.h"
   58 #include "matcd.h"
   59 #include "od.h"
   60 
   61 /*
   62  * Generic configuration;  all in one
   63  */
   64 dev_t   rootdev = NODEV;
   65 dev_t   dumpdev = NODEV;
   66 
   67 #ifdef notused
   68 int     nswap;
   69 struct  swdevt swdevt[] = {
   70         { makedev (0xFF, 0x00000001),   0,      0 },
   71 #if NVN > 0
   72         { makedev (15, 0x00000001),     0,      0 },
   73 #endif
   74         { NODEV,        0,      0 }, /* For NFS diskless */
   75         { NODEV,        0,      0 },
   76 };
   77 int     dmmin, dmmax, dmtext;
   78 #endif
   79 
   80 #ifdef NFS
   81 extern int (*mountroot)  __P((void));
   82 extern int nfs_mountroot __P((void));
   83 #endif
   84 
   85 void gets __P((char *));
   86 
   87 struct  genericconf {
   88         char    *gc_name;
   89         dev_t   gc_root;
   90 } genericconf[] = {
   91 #if NWD > 0
   92         { "wd",         makedev(0, 0x00000000), },
   93 #endif
   94 #if NFD > 0
   95         { "fd",         makedev(2, 0x00000000), },
   96 #endif
   97 #if NSD > 0
   98         { "sd",         makedev(4, 0x00000000), },
   99 #endif
  100 #if NCD > 0
  101         { "cd",         makedev(6, 0x00000000), },
  102 #endif
  103 #if NMCD > 0
  104         { "mcd",        makedev(7, 0x00000000), },
  105 #endif
  106 #if NSCD > 0
  107         { "scd",        makedev(16,0x00000000), },
  108 #endif
  109 #if NMATCD > 0
  110         { "matcd",      makedev(17,0x00000000), },
  111 #endif
  112 #if NOD > 0
  113         { "od",         makedev(20,0x00000000), },
  114 #endif
  115         { 0 },
  116 };
  117 
  118 void setconf(void)
  119 {
  120         register struct genericconf *gc;
  121         int bd;
  122         int unit, swaponroot = 0;
  123 
  124         if (rootdev != NODEV)
  125                 return;
  126         if (boothowto & RB_ASKNAME) {
  127                 char name[128];
  128 retry:
  129                 printf("root device? ");
  130                 gets(name);
  131                 for (gc = genericconf; gc->gc_name; gc++)
  132                         if (gc->gc_name[0] == name[0] &&
  133                             gc->gc_name[1] == name[1])
  134                                 goto gotit;
  135                 goto bad;
  136 gotit:
  137                 if (name[3] == '*') {
  138                         name[3] = name[4];
  139                         swaponroot++;
  140                 }
  141                 if (name[2] >= '' && name[2] <= '7' && name[3] == 0) {
  142                         unit = name[2] - '';
  143                         goto found;
  144                 }
  145                 printf("bad/missing unit number\n");
  146 bad:
  147                 printf("use dk%%d\n");
  148                 goto retry;
  149         }
  150 #ifdef NFS
  151         if (mountroot == nfs_mountroot) {
  152                 /*
  153                  * The NFS code in nfs_vfsops.c handles root and swap
  154                  * for us if we're booting diskless. This is just to
  155                  * make swapconf() happy.
  156                  */
  157                 dumplo = -1;
  158                 return;
  159         }
  160 #endif
  161         unit = 0;
  162         for (gc = genericconf; gc->gc_name; gc++) {
  163                 for (bd = 0; bd < nblkdev; bd++) {
  164                         if (!strcmp(bdevsw[bd]->d_name, gc->gc_name)) {
  165                                 printf("root on %s0\n", bdevsw[bd]->d_name);
  166                                 goto found;
  167                         }
  168                 }
  169         }
  170         printf("no suitable root -- press any key to reboot\n\n");
  171         cngetc();
  172         cpu_reset();
  173         for(;;) ;
  174 found:
  175         gc->gc_root = makedev(major(gc->gc_root), unit * MAXPARTITIONS);
  176         rootdev = gc->gc_root;
  177 }
  178 
  179 void gets(cp)
  180         char *cp;
  181 {
  182         register char *lp;
  183         register c;
  184 
  185         lp = cp;
  186         for (;;) {
  187                 printf("%c", c = cngetc()&0177);
  188                 switch (c) {
  189                 case -1:
  190                 case '\n':
  191                 case '\r':
  192                         *lp++ = '\0';
  193                         return;
  194                 case '\b':
  195                 case '\177':
  196                         if (lp > cp) {
  197                                 printf(" \b");
  198                                 lp--;
  199                         }
  200                         continue;
  201                 case '#':
  202                         lp--;
  203                         if (lp < cp)
  204                                 lp = cp;
  205                         continue;
  206                 case '@':
  207                 case 'u'&037:
  208                         lp = cp;
  209                         printf("%c", '\n');
  210                         continue;
  211                 default:
  212                         *lp++ = c;
  213                 }
  214         }
  215 }

Cache object: d861dce0d3c20d1f3d80a117a44bc21c


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