![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to kdsoft.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [GnuMach] / Gnu-Mach / i386 / i386at|
Return to kdsoft.h CVS log | Up to [GnuMach] / Gnu-Mach / i386 / i386at |
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: kdsoft.h
28: Description: Software structures for keyboard/display driver, shared with
29: drivers for specific graphics cards.
30:
31: $ Header: $
32:
33: Copyright Ing. C. Olivetti & C. S.p.A. 1988, 1989.
34: All rights reserved.
35: ********************************************************************** */
36:
37: /*
38: Copyright 1988, 1989 by Olivetti Advanced Technology Center, Inc.,
39: Cupertino, California.
40:
41: All Rights Reserved
42:
43: Permission to use, copy, modify, and distribute this software and
44: its documentation for any purpose and without fee is hereby
45: granted, provided that the above copyright notice appears in all
46: copies and that both the copyright notice and this permission notice
47: appear in supporting documentation, and that the name of Olivetti
48: not be used in advertising or publicity pertaining to distribution
49: of the software without specific, written prior permission.
50:
51: OLIVETTI DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
52: INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
53: IN NO EVENT SHALL OLIVETTI BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
54: CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
55: LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
56: NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
57: WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
58: */
59:
1.1.1.3 ! root 60: #ifndef _KDSOFT_H_
! 61: #define _KDSOFT_H_
! 62:
1.1 root 63: /*
1.1.1.2 root 64: * Globals used for both character-based controllers and bitmap-based
65: * controllers.
66: */
67: typedef short csrpos_t; /* cursor position, ONE_SPACE bytes per char */
68:
69: extern u_char *vid_start; /* VM start of video RAM or frame buffer */
70: extern csrpos_t kd_curpos; /* should be set only by kd_setpos */
71: extern short kd_lines; /* num lines in tty display */
72: extern short kd_cols;
73: extern char kd_attr; /* current character attribute */
74:
75:
76: /*
77: * Globals used only for bitmap-based controllers.
78: * XXX - probably needs reworking for color.
79: */
80:
81: /*
1.1 root 82: * This driver handles two types of graphics cards. The first type
83: * (e.g., EGA, CGA), treats the screen as a page of characters and
84: * has a hardware cursor. The second type (e.g., the Blit) treats the
85: * screen as a bitmap. A hardware cursor may be present, but it is
86: * ignored in favor of a software cursor.
87: *
88: *
89: * Most of the driver uses the following abstraction for the display:
90: *
91: * The cursor position is simply an index into a (logical) linear char
92: * array that wraps around at the end of each line. Each character
93: * takes up ONE_SPACE bytes. Values in [0..ONE_PAGE) are positions in
94: * the displayed page. Values < 0 and >= ONE_PAGE are off the page
95: * and require some scrolling to put the cursor back on the page.
96: *
97: * The kd_dxxx routines handle the conversion from this abstraction to
98: * what the hardware requires.
99: *
100: * (*kd_dput)(pos, ch, chattr)
101: * csrpos_t pos;
102: * char ch, chattr;
103: * Displays a character at "pos", where "ch" = the character to
104: * be displayed and "chattr" is its attribute byte.
105: *
106: * (*kd_dmvup)(from, to, count)
107: * csrpos_t from, to;
108: * int count;
109: * Does a (relatively) fast block transfer of characters upward.
110: * "count" is the number of character positions (not bytes) to move.
111: * "from" is the character position to start moving from (at the start
112: * of the block to be moved). "to" is the character position to start
113: * moving to.
114: *
115: * (*kd_dmvdown)(from, to, count)
116: * csrpos_t from, to;
117: * int count;
118: * "count" is the number of character positions (not bytes) to move.
119: * "from" is the character position to start moving from (at the end
120: * of the block to be moved). "to" is the character position to
121: * start moving to.
122: *
123: * (*kd_dclear)(to, count, chattr)
124: * csrpos_t, to;
125: * int count;
126: * char chattr;
127: * Erases "count" character positions, starting with "to".
128: *
129: * (*kd_dsetcursor)(pos)
130: * Sets kd_curpos and moves the displayed cursor to track it. "pos"
131: * should be in the range [0..ONE_PAGE).
132: *
133: * (*kd_dreset)()
134: * In some cases, the boot program expects the display to be in a
135: * particular state, and doing a soft reset (i.e.,
136: * software-controlled reboot) doesn't put it into that state. For
137: * these cases, the machine-specific driver should provide a "reset"
138: * procedure, which will be called just before the kd code causes the
139: * system to reboot.
140: */
141:
1.1.1.2 root 142: extern void bmpput(csrpos_t, char, char);
143: extern void bmpmvup(csrpos_t, csrpos_t, int);
144: extern void bmpmvdown(csrpos_t, csrpos_t, int);
145: extern void bmpclear(csrpos_t, int, char);
146: extern void bmpsetcursor(csrpos_t);
1.1 root 147:
148: extern void (*kd_dput)(); /* put attributed char */
149: extern void (*kd_dmvup)(); /* block move up */
150: extern void (*kd_dmvdown)(); /* block move down */
151: extern void (*kd_dclear)(); /* block clear */
152: extern void (*kd_dsetcursor)();
153: /* set cursor position on displayed page */
154: extern void (*kd_dreset)(); /* prepare for reboot */
155:
156:
157: /*
158: * The following font layout is assumed:
159: *
160: * The top scan line of all the characters comes first. Then the
161: * second scan line, then the third, etc.
162: *
163: * ------ ... ---------|-----N--------|-------------- ... -----------
164: * ------ ... ---------|-----N--------|-------------- ... -----------
165: * .
166: * .
167: * .
168: * ------ ... ---------|-----N--------|-------------- ... -----------
169: *
170: * In the picture, each line is a scan line from the font. Each scan
171: * line is stored in memory immediately after the previous one. The
172: * bits between the vertical lines are the bits for a single character
173: * (e.g., the letter "N").
174: * There are "char_height" scan lines. Each character is "char_width"
175: * bits wide. We make the simplifying assumption that characters are
176: * on byte boundaries. (We also assume that a byte is 8 bits.)
177: */
178:
179: extern u_char *font_start; /* starting addr of font */
180:
181: extern short fb_width; /* bits in frame buffer scan line */
182: extern short fb_height; /* scan lines in frame buffer*/
183: extern short char_width; /* bit width of 1 char */
184: extern short char_height; /* bit height of 1 char */
185: extern short chars_in_font;
186: extern short cursor_height; /* bit height of cursor */
187: /* char_height + cursor_height = line_height */
188:
189: extern u_char char_black; /* 8 black (off) bits */
190: extern u_char char_white; /* 8 white (on) bits */
191:
192:
193: /*
194: * The tty emulation does not usually require the entire frame buffer.
195: * (xstart, ystart) is the bit address for the upper left corner of the
196: * tty "screen".
197: */
198:
199: extern short xstart, ystart;
200:
201:
202: /*
203: * Accelerators for bitmap displays.
204: */
205:
206: extern short char_byte_width; /* char_width/8 */
207: extern short fb_byte_width; /* fb_width/8 */
208: extern short font_byte_width; /* num bytes in 1 scan line of font */
1.1.1.3 ! root 209:
! 210: #endif /* _KDSOFT_H_ */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.