getchar moved to cons.c for kdb; make rootdev initialized

[unix-history] / usr / src / sys / tahoe / tahoe / swapgeneric.c

/*      swapgeneric.c   1.5     86/11/25        */

#include "../machine/pte.h"

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

#include "../tahoe/cpu.h"
#include "../tahoe/cp.h"
#include "../tahoe/mtpr.h"
#include "../tahoevba/vbavar.h"

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

extern  struct vba_driver vddriver;

struct  genericconf {
       caddr_t gc_driver;
       char    *gc_name;
       dev_t   gc_root;
} genericconf[] = {
       { (caddr_t)&vddriver,   "dk",   makedev(1, 0),  },
       { 0 },
};

setconf()
{
       register struct vba_device *ui;
       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;
}

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;
               }
       }
}