root/kern/dev/lamebus/lscreen.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 _LAMEBUS_LSCREEN_H_
  31 #define _LAMEBUS_LSCREEN_H_
  33 /*
  34  * Hardware device data for memory-mapped fullscreen text console.
  35  */
  36 struct lscreen_softc {
  37         /* Initialized by config function */
  38         struct spinlock ls_lock;      // protects data and device regs
  39         unsigned ls_width, ls_height; // screen size
  40         unsigned ls_cx, ls_cy;        // cursor position
  41         char *ls_screen;              // memory-mapped screen buffer
  43         /* Initialized by lower-level attachment function */
  44         void *ls_busdata;               // bus we're on
uint32_t ls_buspos;             // position on that bus
  47         /* Initialized by higher-level attachment function */
  48         void *ls_devdata;                       // data and functions for
  49         void (*ls_start)(void *devdata);        // upper device (perhaps
  50         void (*ls_input)(void *devdata, int ch); // console)
  51 };
  53 /* Functions called by lower-level drivers */
  54 void lscreen_irq(/*struct lser_softc*/ void *sc);  // interrupt handler
  56 /* Functions called by higher-level drivers */
  57 void lscreen_write(/*struct lser_softc*/ void *sc, int ch); // output function
  59 #endif /* _LAMEBUS_LSCREEN_H_ */