The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/chips/screen_switch.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        screen_switch.h,v $
   29  * Revision 2.6  91/06/19  11:54:28  rvb
   30  *      File moved here from mips/PMAX since it tries to be generic;
   31  *      it is used on the PMAX and the Vax3100.
   32  *      [91/06/04            rvb]
   33  * 
   34  * Revision 2.5  91/05/14  17:27:50  mrt
   35  *      Correcting copyright
   36  * 
   37  * Revision 2.4  91/02/05  17:44:30  mrt
   38  *      Added author notices
   39  *      [91/02/04  11:17:53  mrt]
   40  * 
   41  *      Changed to use new Mach copyright
   42  *      [91/02/02  12:16:32  mrt]
   43  * 
   44  * Revision 2.3  90/12/05  23:34:34  af
   45  * 
   46  * 
   47  * Revision 2.1.1.1  90/11/01  03:41:45  af
   48  *      Re-created from pm_switch.h for new consistent naming scheme.
   49  *      [90/10/04            af]
   50  * 
   51  */
   52 /*
   53  *      File: screen_switch.h
   54  *      Author: Alessandro Forin, Carnegie Mellon University
   55  *      Date:   10/90
   56  *
   57  *      Definitions of things that must be tailored to
   58  *      specific hardware boards for the Generic Screen Driver.
   59  */
   60 
   61 #ifndef SCREEN_SWITCH_H
   62 #define SCREEN_SWITCH_H 1
   63 
   64 /*
   65  *      List of probe routines, scanned at cold-boot time
   66  *      to see which, if any, graphic display is available.
   67  *      This is done before autoconf, so that printing on
   68  *      the console works early on.  The alloc routine is
   69  *      called only on the first device that answers.
   70  *      Ditto for the setup routine, called later on.
   71  */
   72 struct screen_probe_vector {
   73         int             (*probe)();
   74         unsigned int    (*alloc)();
   75         int             (*setup)();
   76 };
   77 
   78 /*
   79  *      Low-level operations on the graphic device, used
   80  *      by the otherwise device-independent interface code
   81  */
   82 struct screen_switch {
   83         int     (*graphic_open)();      /* when X11 opens */
   84         int     (*graphic_close)();     /* .. or closes */
   85         int     (*set_status)();        /* dev-specific ops */
   86         int     (*get_status)();        /* dev-specific ops */
   87         int     (*char_paint)();        /* blitc */
   88         int     (*pos_cursor)();        /* cursor positioning */
   89         int     (*insert_line)();       /* ..and scroll down */
   90         int     (*remove_line)();       /* ..and scroll up */
   91         int     (*clear_bitmap)();      /* blank screen */
   92         int     (*video_on)();          /* screen saver */
   93         int     (*video_off)();
   94         int     (*intr_enable)();
   95         int     (*map_page)();          /* user-space mapping */
   96 };
   97 
   98 /*
   99  *      Each graphic device needs page-aligned memory
  100  *      to be mapped in user space later (for events
  101  *      and such).  Size and content of this memory
  102  *      is unfortunately device-dependent, even if
  103  *      it did not need to (puns).
  104  */
  105 extern char  *screen_data;
  106 
  107 extern struct screen_probe_vector screen_probe_vector[];
  108 
  109 extern int screen_noop(), screen_find();
  110 
  111 #endif  SCREEN_SWITCH_H

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