BSD 4_4 release

[unix-history] / usr / src / sys / news3400 / news3400 / cons.c

/*
* Copyright (c) 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kazumasa Utashiro of Software Research Associates, Inc.
*
* 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.
*
*      @(#)cons.c      8.1 (Berkeley) 6/11/93
*/

#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/conf.h>

#include "bm.h"

dev_t consdev = (dev_t)NULL;    /* initialized by consinit() */
struct tty *constty = 0;

vcopen(dev, flag, mode, p)
       dev_t dev;
       int flag, mode;
       struct proc *p;
{
       if ((dev = consdev) == NULL)
               return 0;
       return ((*cdevsw[major(dev)].d_open)(dev, flag, mode, p));
}

vcclose(dev, flag, mode, p)
       dev_t dev;
       int flag, mode;
       struct proc *p;
{
       if ((dev = consdev) == NULL)
               return 0;
       return ((*cdevsw[major(dev)].d_close)(dev, flag, mode, p));
}

vcread(dev, uio, flag)
       dev_t dev;
       struct uio *uio;
{
       if ((dev = consdev) == NULL)
               return 0;
       return ((*cdevsw[major(dev)].d_read)(dev, uio, flag));
}

vcwrite(dev, uio, flag)
       dev_t dev;
       struct uio *uio;
       int flag;
{
       if ((dev = consdev) == NULL)
               return 0;
       return ((*cdevsw[major(dev)].d_write)(dev, uio, flag));
}

vcstop(tp, flag)
       struct tty *tp;
       int flag;
{
       dev_t dev;

       if ((dev = consdev) == NULL)
               return 0;
       return ((*cdevsw[major(dev)].d_stop)(tp, flag));
}

vcioctl(dev, cmd, data, flag, p)
       dev_t dev;
       caddr_t data;
       struct proc *p;
{
       if ((dev = consdev) == NULL)
               return 0;
       return ((*cdevsw[major(dev)].d_ioctl)(dev, cmd, data, flag, p));
}

/*ARGSUSED*/
vcselect(dev, rw, p)
       dev_t dev;
       int rw;
       struct proc *p;
{
       if ((dev = consdev) == NULL)
               return 1;
       return (ttselect(dev, rw, p));
}

/*
* Get character from console.
*/
cngetc()
{
       /* notyet */
       return(0);
}

#define SCC_CONSOLE     0
/*
* Print a character on console.
*/
cnputc(c)
       int c;
{
       int s;
       int (*putc)(), scccons_putc(), bmcons_putc();

       if (consdev == NULL)
               return 0;

#if NBM > 0
       if (consdev == makedev(1, 0))
               putc = scccons_putc;
       else
               putc = bmcons_putc;
#else
       putc = scccons_putc;
#endif

       /* KU: should be much more efficient */
       s = splhigh();
       putc(c);
       if (c == '\n')
               putc('\r');
       splx(s);
}

scccons_putc(c)
       int c;
{
       char cnbuf[1];

       cnbuf[0] = (char)c;
       scc_error_write(SCC_CONSOLE, cnbuf, 1);
}

#if NBM > 0
bmcons_putc(c)
       int c;
{
       char cnbuf[1];

       cnbuf[0] = (char)c;
       vt100_write(0, cnbuf, 1);
}
#endif