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Annotation of sys/dev/cons.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: cons.h,v 1.15 2006/01/01 11:59:40 miod Exp $  */
                      2: /*     $NetBSD: cons.h,v 1.14 1996/03/14 19:08:35 christos Exp $       */
                      3:
                      4: /*
                      5:  * Copyright (c) 1988 University of Utah.
                      6:  * Copyright (c) 1990, 1993
                      7:  *     The Regents of the University of California.  All rights reserved.
                      8:  *
                      9:  * This code is derived from software contributed to Berkeley by
                     10:  * the Systems Programming Group of the University of Utah Computer
                     11:  * Science Department.
                     12:  *
                     13:  * Redistribution and use in source and binary forms, with or without
                     14:  * modification, are permitted provided that the following conditions
                     15:  * are met:
                     16:  * 1. Redistributions of source code must retain the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer.
                     18:  * 2. Redistributions in binary form must reproduce the above copyright
                     19:  *    notice, this list of conditions and the following disclaimer in the
                     20:  *    documentation and/or other materials provided with the distribution.
                     21:  * 3. Neither the name of the University nor the names of its contributors
                     22:  *    may be used to endorse or promote products derived from this software
                     23:  *    without specific prior written permission.
                     24:  *
                     25:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     26:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     27:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     28:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     29:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     30:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     31:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     32:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     33:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     34:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     35:  * SUCH DAMAGE.
                     36:  *
                     37:  * from: Utah $Hdr: cons.h 1.6 92/01/21$
                     38:  *
                     39:  *     @(#)cons.h      8.1 (Berkeley) 6/10/93
                     40:  */
                     41:
                     42: struct consdev {
                     43:                                /* probe hardware and fill in consdev info */
                     44:        void    (*cn_probe)(struct consdev *);
                     45:                                /* turn on as console */
                     46:        void    (*cn_init)(struct consdev *);
                     47:                                /* kernel getchar interface */
                     48:        int     (*cn_getc)(dev_t);
                     49:                                /* kernel putchar interface */
                     50:        void    (*cn_putc)(dev_t, int);
                     51:                                /* turn on and off polling */
                     52:        void    (*cn_pollc)(dev_t, int);
                     53:                                /* ring bell */
                     54:        void    (*cn_bell)(dev_t, u_int, u_int, u_int);
                     55:        dev_t   cn_dev;         /* major/minor of device */
                     56:        int     cn_pri;         /* picking order; the higher the better */
                     57: };
                     58:
                     59: /* values for cn_pri - reflect our policy for console selection */
                     60: #define        CN_DEAD         0       /* device doesn't exist */
                     61: #define CN_NORMAL      1       /* device exists but is nothing special */
                     62: #define CN_INTERNAL    2       /* "internal" bit-mapped display */
                     63: #define CN_REMOTE      3       /* serial interface with remote bit set */
                     64: #define        CN_FORCED       4
                     65:
                     66: /* XXX */
                     67: #define        CONSMAJOR       0
                     68:
                     69: #ifdef _KERNEL
                     70:
                     71: extern struct consdev constab[];
                     72: extern struct consdev *cn_tab;
                     73:
                     74: struct knote;
                     75:
                     76: void   cninit(void);
                     77: int    cnset(dev_t);
                     78: int    cnopen(dev_t, int, int, struct proc *);
                     79: int    cnclose(dev_t, int, int, struct proc *);
                     80: int    cnread(dev_t, struct uio *, int);
                     81: int    cnwrite(dev_t, struct uio *, int);
                     82: int    cnioctl(dev_t, u_long, caddr_t, int, struct proc *);
                     83: int    cnpoll(dev_t, int, struct proc *);
                     84: int    cnkqfilter(dev_t, struct knote *);
                     85: int    cngetc(void);
                     86: void   cnputc(int);
                     87: void   cnpollc(int);
                     88: void   cnbell(u_int, u_int, u_int);
                     89: void   cnrint(void);
                     90: void   nullcnpollc(dev_t, int);
                     91:
                     92: /* console-specific types */
                     93: #define        dev_type_cnprobe(n)     void n(struct consdev *)
                     94: #define        dev_type_cninit(n)      void n(struct consdev *)
                     95: #define        dev_type_cngetc(n)      int n(dev_t)
                     96: #define        dev_type_cnputc(n)      void n(dev_t, int)
                     97: #define        dev_type_cnpollc(n)     void n(dev_t, int)
                     98: #define        dev_type_cnbell(n)      void n(dev_t, u_int, u_int, u_int)
                     99:
                    100: #define        cons_decl(n) \
                    101:        dev_decl(n,cnprobe); dev_decl(n,cninit); dev_decl(n,cngetc); \
                    102:        dev_decl(n,cnputc); dev_decl(n,cnpollc); dev_decl(n,cnbell);
                    103:
                    104: #define        cons_init(n) { \
                    105:        dev_init(1,n,cnprobe), dev_init(1,n,cninit), dev_init(1,n,cngetc), \
                    106:        dev_init(1,n,cnputc), dev_init(1,n,cnpollc), NULL, \
                    107:        NODEV, CN_DEAD }
                    108:
                    109: #define cons_init_bell(n) { \
                    110:        dev_init(1,n,cnprobe), dev_init(1,n,cninit), dev_init(1,n,cngetc), \
                    111:        dev_init(1,n,cnputc), dev_init(1,n,cnpollc), dev_init(1,n,cnbell), \
                    112:        NODEV, CN_DEAD }
                    113:
                    114: #endif