usr/src/sys/hp300/stand/cons.c

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * %sccs.include.redist.c%
 *
 * from: Utah $Hdr: cons.c 1.7 92/02/28$
 *
 *      @(#)cons.c      7.5 (Berkeley) %G%
 */

#include "sys/param.h"
#include "samachdep.h"
#include "../hp/dev/cons.h"

#ifdef ITECONSOLE
int     iteprobe(), iteinit(), itegetchar(), iteputchar();
#endif
#ifdef DCACONSOLE
int     dcaprobe(), dcainit(), dcagetchar(), dcaputchar();
#endif
#ifdef DCMCONSOLE
int     dcmprobe(), dcminit(), dcmgetchar(), dcmputchar();
#endif

struct consdev constab[] = {
#ifdef ITECONSOLE
        { iteprobe,     iteinit,        itegetchar,     iteputchar },
#endif
#ifdef DCACONSOLE
        { dcaprobe,     dcainit,        dcagetchar,     dcaputchar },
#endif
#ifdef DCMCONSOLE
        { dcmprobe,     dcminit,        dcmgetchar,     dcmputchar },
#endif
        { 0 },
};

struct consdev *cn_tab;
int noconsole;

cninit()
{
        register struct consdev *cp;

        cn_tab = NULL;
        noconsole = 1;
        for (cp = constab; cp->cn_probe; cp++) {
                (*cp->cn_probe)(cp);
                if (cp->cn_pri > CN_DEAD &&
                    (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri))
                        cn_tab = cp;
        }
        if (cn_tab) {
                (*cn_tab->cn_init)(cn_tab);
                noconsole = 0;
        }
}

cngetc()
{
        if (cn_tab)
                return((*cn_tab->cn_getc)());
        return(0);
}

cnputc(c)
        int c;
{
#ifdef ROMPRF
        extern int userom;

        if (userom)
                romputchar(c);
        else
#endif
        if (cn_tab)
                (*cn_tab->cn_putc)(c);
}