FreeBSD/Linux Kernel Cross Reference
sys/osfmk/ppc/screen_switch.h

     /*
      * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /*
     * @OSF_COPYRIGHT@
     */
    /* 
     * Mach Operating System
     * Copyright (c) 1991,1990,1989 Carnegie Mellon University
     * All Rights Reserved.
     * 
     * Permission to use, copy, modify and distribute this software and its
     * documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /*
     */
    /*
     *      File: screen_switch.h
     *      Author: Alessandro Forin, Carnegie Mellon University
     *      Date:   10/90
     *
     *      Definitions of things that must be tailored to
     *      specific hardware boards for the Generic Screen Driver.
     */
    
    #ifndef SCREEN_SWITCH_H
    #define SCREEN_SWITCH_H 1
    
    #include <mach/boolean.h>
    
    /*
     *      List of probe routines, scanned at cold-boot time
     *      to see which, if any, graphic display is available.
     *      This is done before autoconf, so that printing on
     *      the console works early on.  The alloc routine is
     *      called only on the first device that answers.
     *      Ditto for the setup routine, called later on.
     */
    struct screen_probe_vector {
            int             (*probe)(void);
            unsigned int    (*alloc)(void);
            int             (*setup)(int, user_info_t);
    };
    
    /*
     *      Low-level operations on the graphic device, used
     *      by the otherwise device-independent interface code
     */
    
    /* Forward declaration of screen_softc_t */
    typedef struct screen_softc *screen_softc_t;
    
    struct screen_switch {
            int     (*graphic_open)(void);                  /* when X11 opens */
            int     (*graphic_close)(screen_softc_t);       /* .. or closes */
            int     (*set_status)(screen_softc_t,
                                  dev_flavor_t,
                                  dev_status_t,
                                  natural_t);               /* dev-specific ops */
            int     (*get_status)(screen_softc_t,
                                  dev_flavor_t,
                                 dev_status_t,
                                 natural_t*);              /* dev-specific ops */
           int     (*char_paint)(screen_softc_t,
                                 int,
                                 int,
                                 int);                     /* blitc */
           int     (*pos_cursor)(void*,
                                 int,
                                 int);                     /* cursor positioning*/
           int     (*insert_line)(screen_softc_t,
                                  short);                  /* ..and scroll down */
           int     (*remove_line)(screen_softc_t,
                                  short);                  /* ..and scroll up */
           int     (*clear_bitmap)(screen_softc_t);        /* blank screen */
           int     (*video_on)(void*,
                               user_info_t*);              /* screen saver */
           int     (*video_off)(void*,
                                user_info_t*);
           int     (*intr_enable)(void*,
                                  boolean_t);
           int     (*map_page)(screen_softc_t,
                               vm_offset_t,
                               int);                       /* user-space mapping*/
   };
   
   /*
    *      Each graphic device needs page-aligned memory
    *      to be mapped in user space later (for events
    *      and such).  Size and content of this memory
    *      is unfortunately device-dependent, even if
    *      it did not need to (puns).
    */
   extern char  *screen_data;
   
   extern struct screen_probe_vector screen_probe_vector[];
   
   extern int screen_noop(void), screen_find(void);
   
   #endif  /* SCREEN_SWITCH_H */

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