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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25: /*
26: * Mach Operating System
27: * Copyright (c) 1991,1990,1989 Carnegie Mellon University
28: * All Rights Reserved.
29: *
30: * Permission to use, copy, modify and distribute this software and its
31: * documentation is hereby granted, provided that both the copyright
32: * notice and this permission notice appear in all copies of the
33: * software, derivative works or modified versions, and any portions
34: * thereof, and that both notices appear in supporting documentation.
35: *
36: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
37: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
38: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
39: *
40: * Carnegie Mellon requests users of this software to return to
41: *
42: * Software Distribution Coordinator or [email protected]
43: * School of Computer Science
44: * Carnegie Mellon University
45: * Pittsburgh PA 15213-3890
46: *
47: * any improvements or extensions that they make and grant Carnegie Mellon
48: * the rights to redistribute these changes.
49: */
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: #include <mach/boolean.h>
65:
66: /*
67: * List of probe routines, scanned at cold-boot time
68: * to see which, if any, graphic display is available.
69: * This is done before autoconf, so that printing on
70: * the console works early on. The alloc routine is
71: * called only on the first device that answers.
72: * Ditto for the setup routine, called later on.
73: */
74: struct screen_probe_vector {
75: int (*probe)(void);
76: unsigned int (*alloc)(void);
77: int (*setup)(int, user_info_t);
78: };
79:
80: /*
81: * Low-level operations on the graphic device, used
82: * by the otherwise device-independent interface code
83: */
84:
85: /* Forward declaration of screen_softc_t */
86: typedef struct screen_softc *screen_softc_t;
87:
88: struct screen_switch {
89: int (*graphic_open)(void); /* when X11 opens */
90: int (*graphic_close)(screen_softc_t); /* .. or closes */
91: int (*set_status)(screen_softc_t,
92: dev_flavor_t,
93: dev_status_t,
94: natural_t); /* dev-specific ops */
95: int (*get_status)(screen_softc_t,
96: dev_flavor_t,
97: dev_status_t,
98: natural_t*); /* dev-specific ops */
99: int (*char_paint)(screen_softc_t,
100: int,
101: int,
102: int); /* blitc */
103: int (*pos_cursor)(void*,
104: int,
105: int); /* cursor positioning*/
106: int (*insert_line)(screen_softc_t,
107: short); /* ..and scroll down */
108: int (*remove_line)(screen_softc_t,
109: short); /* ..and scroll up */
110: int (*clear_bitmap)(screen_softc_t); /* blank screen */
111: int (*video_on)(void*,
112: user_info_t*); /* screen saver */
113: int (*video_off)(void*,
114: user_info_t*);
115: int (*intr_enable)(void*,
116: boolean_t);
117: int (*map_page)(screen_softc_t,
118: vm_offset_t,
119: int); /* user-space mapping*/
120: };
121:
122: /*
123: * Each graphic device needs page-aligned memory
124: * to be mapped in user space later (for events
125: * and such). Size and content of this memory
126: * is unfortunately device-dependent, even if
127: * it did not need to (puns).
128: */
129: extern char *screen_data;
130:
131: extern struct screen_probe_vector screen_probe_vector[];
132:
133: extern int screen_noop(void), screen_find(void);
134:
135: #endif /* SCREEN_SWITCH_H */
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