root/kern/dev/generic/console.h

INCLUDED FROM

   1 /*
   2  * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
   3  *      The President and Fellows of Harvard College.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 #ifndef _GENERIC_CONSOLE_H_
  31 #define _GENERIC_CONSOLE_H_
  33 /*
  34  * Device data for the hardware-independent system console.
  35  *
  36  * devdata, send, and sendpolled are provided by the underlying
  37  * device, and are to be initialized by the attach routine.
  38  */
  40 #define CONSOLE_INPUT_BUFFER_SIZE 32
  42 struct con_softc {
  43         /* initialized by attach routine */
  44         void *cs_devdata;
  45         void (*cs_send)(void *devdata, int ch);
  46         void (*cs_sendpolled)(void *devdata, int ch);
  47         void (*cs_startpolling)(void *devdata);
  48         void (*cs_endpolling)(void *devdata);
  50         /* initialized by config routine */
  51         struct semaphore *cs_rsem;
  52         struct semaphore *cs_wsem;
  53         unsigned char cs_gotchars[CONSOLE_INPUT_BUFFER_SIZE];
  54         unsigned cs_gotchars_head;      /* next slot to put a char in */
  55         unsigned cs_gotchars_tail;      /* next slot to take a char out */
  56 };
  58 /*
  59  * Functions called by lower-level drivers
  60  */
  61 void con_input(/*struct con_softc*/ void *cs, int ch);
  62 void con_start(/*struct con_softc*/ void *cs);
  64 /*
  65  * Functions called by higher-level code
  66  *
  67  * putch/getch - see <lib.h>
  68  */
  70 #endif /* _GENERIC_CONSOLE_H_ */