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/* $OpenBSD: cons.h,v 1.16 2008/01/23 16:37:55 jsing Exp $ */
/* $NetBSD: cons.h,v 1.14 1996/03/14 19:08:35 christos Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990, 1993
* 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. 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: Utah $Hdr: cons.h 1.6 92/01/21$
*
* @(#)cons.h 8.1 (Berkeley) 6/10/93
*/
struct consdev {
/* probe hardware and fill in consdev info */
void (*cn_probe)(struct consdev *);
/* turn on as console */
void (*cn_init)(struct consdev *);
/* kernel getchar interface */
int (*cn_getc)(dev_t);
/* kernel putchar interface */
void (*cn_putc)(dev_t, int);
/* turn on and off polling */
void (*cn_pollc)(dev_t, int);
/* ring bell */
void (*cn_bell)(dev_t, u_int, u_int, u_int);
dev_t cn_dev; /* major/minor of device */
u_int cn_pri; /* picking order; the higher the better */
};
/* Values for cn_pri - policy for console selection. */
#define CN_DEAD 0 /* Device does not exist. */
#define CN_LOWPRI 1 /* Device exists and is low priority. */
#define CN_MIDPRI 2 /* Device exists and is medium priority. */
#define CN_HIGHPRI 3 /* Device exists and is high priority. */
#define CN_FORCED 4 /* Use this device. */
/* XXX */
#define CONSMAJOR 0
#ifdef _KERNEL
extern struct consdev constab[];
extern struct consdev *cn_tab;
struct knote;
void cninit(void);
int cnset(dev_t);
int cnopen(dev_t, int, int, struct proc *);
int cnclose(dev_t, int, int, struct proc *);
int cnread(dev_t, struct uio *, int);
int cnwrite(dev_t, struct uio *, int);
int cnioctl(dev_t, u_long, caddr_t, int, struct proc *);
int cnpoll(dev_t, int, struct proc *);
int cnkqfilter(dev_t, struct knote *);
int cngetc(void);
void cnputc(int);
void cnpollc(int);
void cnbell(u_int, u_int, u_int);
void cnrint(void);
void nullcnpollc(dev_t, int);
/* console-specific types */
#define dev_type_cnprobe(n) void n(struct consdev *)
#define dev_type_cninit(n) void n(struct consdev *)
#define dev_type_cngetc(n) int n(dev_t)
#define dev_type_cnputc(n) void n(dev_t, int)
#define dev_type_cnpollc(n) void n(dev_t, int)
#define dev_type_cnbell(n) void n(dev_t, u_int, u_int, u_int)
#define cons_decl(n) \
dev_decl(n,cnprobe); dev_decl(n,cninit); dev_decl(n,cngetc); \
dev_decl(n,cnputc); dev_decl(n,cnpollc); dev_decl(n,cnbell);
#define cons_init(n) { \
dev_init(1,n,cnprobe), dev_init(1,n,cninit), dev_init(1,n,cngetc), \
dev_init(1,n,cnputc), dev_init(1,n,cnpollc), NULL, \
NODEV, CN_DEAD }
#define cons_init_bell(n) { \
dev_init(1,n,cnprobe), dev_init(1,n,cninit), dev_init(1,n,cngetc), \
dev_init(1,n,cnputc), dev_init(1,n,cnpollc), dev_init(1,n,cnbell), \
NODEV, CN_DEAD }
#endif
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