BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / i386 / i386 / swapgeneric.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.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 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.
*
*      @(#)swapgeneric.c       5.5 (Berkeley) 5/9/91
*/

#include "machine/pte.h"

#include "sys/param.h"
#include "sys/conf.h"
#include "sys/buf.h"
#include "sys/vm.h"
#include "sys/systm.h"
#include "sys/reboot.h"

/*
* Generic configuration;  all in one
*/
dev_t   rootdev = makedev(0,0);
dev_t   dumpdev = makedev(0,1);
int     nswap;
struct  swdevt swdevt[] = {
       { 1,    0,      0 },
       { 0,    1,      0 },
};
long    dumplo;
int     dmmin, dmmax, dmtext;

extern  struct driver wddriver;

struct  genericconf {
       caddr_t gc_driver;
       char    *gc_name;
       dev_t   gc_root;
} genericconf[] = {
       { (caddr_t)&wddriver,   "wd",   makedev(0, 0),  },
       { 0 },
};

setconf()
{
#ifdef notdef
       register struct genericconf *gc;
       int unit, swaponroot = 0;

       if (rootdev != NODEV)
               goto doswap;
       if (boothowto & RB_ASKNAME) {
               char name[128];
retry:
               printf("root device? ");
               gets(name);
               for (gc = genericconf; gc->gc_driver; gc++)
                       if (gc->gc_name[0] == name[0] &&
                           gc->gc_name[1] == name[1])
                               goto gotit;
               goto bad;
gotit:
               if (name[3] == '*') {
                       name[3] = name[4];
                       swaponroot++;
               }
               if (name[2] >= '0' && name[2] <= '7' && name[3] == 0) {
                       unit = name[2] - '0';
                       goto found;
               }
               printf("bad/missing unit number\n");
bad:
               printf("use dk%%d\n");
               goto retry;
       }
       unit = 0;
       for (gc = genericconf; gc->gc_driver; gc++) {
               for (ui = vbdinit; ui->ui_driver; ui++) {
                       if (ui->ui_alive == 0)
                               continue;
                       if (ui->ui_unit == 0 && ui->ui_driver ==
                           (struct vba_driver *)gc->gc_driver) {
                               printf("root on %s0\n",
                                   ui->ui_driver->ud_dname);
                               goto found;
                       }
               }
       }
       printf("no suitable root\n");
       asm("halt");
found:
       gc->gc_root = makedev(major(gc->gc_root), unit*8);
       rootdev = gc->gc_root;
doswap:
       swdevt[0].sw_dev = argdev = dumpdev =
           makedev(major(rootdev), minor(rootdev)+1);
       /* swap size and dumplo set during autoconfigure */
       if (swaponroot)
               rootdev = dumpdev;
#endif
}

gets(cp)
       char *cp;
{
       register char *lp;
       register c;

       lp = cp;
       for (;;) {
               printf("%c", c = cngetc()&0177);
               switch (c) {
               case '\n':
               case '\r':
                       *lp++ = '\0';
                       return;
               case '\b':
               case '\177':
                       if (lp > cp) {
                               printf(" \b");
                               lp--;
                       }
                       continue;
               case '#':
                       lp--;
                       if (lp < cp)
                               lp = cp;
                       continue;
               case '@':
               case 'u'&037:
                       lp = cp;
                       printf("%c", '\n');
                       continue;
               default:
                       *lp++ = c;
               }
       }
}