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Annotation of Gnu-Mach/chips/screen_switch.h, revision 1.1

1.1     ! root        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  [email protected]
        !            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:  *     File: screen_switch.h
        !            28:  *     Author: Alessandro Forin, Carnegie Mellon University
        !            29:  *     Date:   10/90
        !            30:  *
        !            31:  *     Definitions of things that must be tailored to
        !            32:  *     specific hardware boards for the Generic Screen Driver.
        !            33:  */
        !            34: 
        !            35: #ifndef        SCREEN_SWITCH_H
        !            36: #define        SCREEN_SWITCH_H 1
        !            37: 
        !            38: /*
        !            39:  *     List of probe routines, scanned at cold-boot time
        !            40:  *     to see which, if any, graphic display is available.
        !            41:  *     This is done before autoconf, so that printing on
        !            42:  *     the console works early on.  The alloc routine is
        !            43:  *     called only on the first device that answers.
        !            44:  *     Ditto for the setup routine, called later on.
        !            45:  */
        !            46: struct screen_probe_vector {
        !            47:        int             (*probe)();
        !            48:        unsigned int    (*alloc)();
        !            49:        int             (*setup)();
        !            50: };
        !            51: 
        !            52: /*
        !            53:  *     Low-level operations on the graphic device, used
        !            54:  *     by the otherwise device-independent interface code
        !            55:  */
        !            56: struct screen_switch {
        !            57:        int     (*graphic_open)();      /* when X11 opens */
        !            58:        int     (*graphic_close)();     /* .. or closes */
        !            59:        int     (*set_status)();        /* dev-specific ops */
        !            60:        int     (*get_status)();        /* dev-specific ops */
        !            61:        int     (*char_paint)();        /* blitc */
        !            62:        int     (*pos_cursor)();        /* cursor positioning */
        !            63:        int     (*insert_line)();       /* ..and scroll down */
        !            64:        int     (*remove_line)();       /* ..and scroll up */
        !            65:        int     (*clear_bitmap)();      /* blank screen */
        !            66:        int     (*video_on)();          /* screen saver */
        !            67:        int     (*video_off)();
        !            68:        int     (*intr_enable)();
        !            69:        int     (*map_page)();          /* user-space mapping */
        !            70: };
        !            71: 
        !            72: /*
        !            73:  *     Each graphic device needs page-aligned memory
        !            74:  *     to be mapped in user space later (for events
        !            75:  *     and such).  Size and content of this memory
        !            76:  *     is unfortunately device-dependent, even if
        !            77:  *     it did not need to (puns).
        !            78:  */
        !            79: extern char  *screen_data;
        !            80: 
        !            81: extern struct screen_probe_vector screen_probe_vector[];
        !            82: 
        !            83: extern int screen_noop(), screen_find();
        !            84: 
        !            85: #endif SCREEN_SWITCH_H

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