cons.h

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/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1991 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.
 *
 * 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.
 *
 *	from: @(#)cons.h	7.2 (Berkeley) 5/9/91
 *	$\Id: cons.h,v 1.9 1995/04/24 16:43:01 bde Exp $
 */

#ifndef _MACHINE_CONS_H_
#define _MACHINE_CONS_H_ 1

struct consdev;
typedef	void	cn_probe_t __P((struct consdev *));
typedef	void	cn_init_t __P((struct consdev *));
typedef	int	cn_getc_t __P((dev_t));
typedef	int	cn_checkc_t __P((dev_t));
typedef	void	cn_putc_t __P((dev_t, int));

#ifdef KERNEL
/*
 * XXX public functions in drivers should be declared in headers produced
 * by `config', not here.
 */
cn_probe_t	pccnprobe;
cn_init_t	pccninit;
cn_getc_t	pccngetc;
cn_checkc_t	pccncheckc;
cn_putc_t	pccnputc;

cn_probe_t	siocnprobe;
cn_init_t	siocninit;
cn_getc_t	siocngetc;
cn_checkc_t	siocncheckc;
cn_putc_t	siocnputc;
#endif /* KERNEL */

struct consdev {
	cn_probe_t	*cn_probe;
				/* probe hardware and fill in consdev info */
	cn_init_t	*cn_init;
				/* turn on as console */
	cn_getc_t	*cn_getc;
				/* kernel getchar interface */
	cn_checkc_t	*cn_checkc;
				/* kernel "return char if available" interface */
	cn_putc_t	*cn_putc;
				/* kernel putchar interface */
	struct	tty *cn_tp;	/* tty structure for console device */
	dev_t	cn_dev;		/* major/minor of device */
	short	cn_pri;		/* pecking order; the higher the better */
};

/* values for cn_pri - reflect our policy for console selection */
#define	CN_DEAD		0	/* device doesn't exist */
#define CN_NORMAL	1	/* device exists but is nothing special */
#define CN_INTERNAL	2	/* "internal" bit-mapped display */
#define CN_REMOTE	3	/* serial interface with remote bit set */

/* XXX */
#define	CONSMAJOR	0

#ifdef KERNEL
extern	struct consdev constab[];
extern	struct consdev *cn_tab;
extern	struct tty *cn_tty;
extern	int cons_unavail;

struct proc; struct uio;

/* cdevsw[] entries */
extern int cnopen(dev_t, int, int, struct proc *);
extern int cnclose(dev_t, int, int, struct proc *);
extern int cnread(dev_t, struct uio *, int);
extern int cnwrite(dev_t, struct uio *, int);
extern int cnioctl(dev_t, int, caddr_t, int, struct proc *);
extern int cnselect(dev_t, int, struct proc *);

/* other kernel entry points */
extern void cninit(void);
extern int cngetc(void);
extern int cncheckc(void);
extern void cnputc(int);
extern int pg(const char *, ...);

#endif /* KERNEL */
#endif /* _MACHINE_CONS_H_ */