1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * @OSF_COPYRIGHT@ 30 */ 31/* 32 * Mach Operating System 33 * Copyright (c) 1991,1990,1989 Carnegie Mellon University 34 * All Rights Reserved. 35 * 36 * Permission to use, copy, modify and distribute this software and its 37 * documentation is hereby granted, provided that both the copyright 38 * notice and this permission notice appear in all copies of the 39 * software, derivative works or modified versions, and any portions 40 * thereof, and that both notices appear in supporting documentation. 41 * 42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 45 * 46 * Carnegie Mellon requests users of this software to return to 47 * 48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 49 * School of Computer Science 50 * Carnegie Mellon University 51 * Pittsburgh PA 15213-3890 52 * 53 * any improvements or extensions that they make and grant Carnegie Mellon 54 * the rights to redistribute these changes. 55 */ 56/* 57 */ 58/* 59 * File: screen_switch.h 60 * Author: Alessandro Forin, Carnegie Mellon University 61 * Date: 10/90 62 * 63 * Definitions of things that must be tailored to 64 * specific hardware boards for the Generic Screen Driver. 65 */ 66 67#ifndef SCREEN_SWITCH_H 68#define SCREEN_SWITCH_H 1 69 70#include <mach/boolean.h> 71 72/* 73 * List of probe routines, scanned at cold-boot time 74 * to see which, if any, graphic display is available. 75 * This is done before autoconf, so that printing on 76 * the console works early on. The alloc routine is 77 * called only on the first device that answers. 78 * Ditto for the setup routine, called later on. 79 */ 80struct screen_probe_vector { 81 int (*probe)(void); 82 unsigned int (*alloc)(void); 83 int (*setup)(int, user_info_t); 84}; 85 86/* 87 * Low-level operations on the graphic device, used 88 * by the otherwise device-independent interface code 89 */ 90 91/* Forward declaration of screen_softc_t */ 92typedef struct screen_softc *screen_softc_t; 93 94struct screen_switch { 95 int (*graphic_open)(void); /* when X11 opens */ 96 int (*graphic_close)(screen_softc_t); /* .. or closes */ 97 int (*set_status)(screen_softc_t, 98 dev_flavor_t, 99 dev_status_t, 100 natural_t); /* dev-specific ops */ 101 int (*get_status)(screen_softc_t, 102 dev_flavor_t, 103 dev_status_t, 104 natural_t*); /* dev-specific ops */ 105 int (*char_paint)(screen_softc_t, 106 int, 107 int, 108 int); /* blitc */ 109 int (*pos_cursor)(void*, 110 int, 111 int); /* cursor positioning*/ 112 int (*insert_line)(screen_softc_t, 113 short); /* ..and scroll down */ 114 int (*remove_line)(screen_softc_t, 115 short); /* ..and scroll up */ 116 int (*clear_bitmap)(screen_softc_t); /* blank screen */ 117 int (*video_on)(void*, 118 user_info_t*); /* screen saver */ 119 int (*video_off)(void*, 120 user_info_t*); 121 int (*intr_enable)(void*, 122 boolean_t); 123 int (*map_page)(screen_softc_t, 124 vm_offset_t, 125 int); /* user-space mapping*/ 126}; 127 128/* 129 * Each graphic device needs page-aligned memory 130 * to be mapped in user space later (for events 131 * and such). Size and content of this memory 132 * is unfortunately device-dependent, even if 133 * it did not need to (puns). 134 */ 135extern char *screen_data; 136 137extern struct screen_probe_vector screen_probe_vector[]; 138 139extern int screen_noop(void), screen_find(void); 140 141#endif /* SCREEN_SWITCH_H */ 142