spinconsole.c revision 276074 
1/*-
2 * spinconsole.c
3 *
4 * Author: Maksym Sobolyev <sobomax@sippysoft.com>
5 * Copyright (c) 2009 Sippy Software, Inc.
6 * All rights reserved.
7 *
8 * Subject to the following obligations and disclaimer of warranty, use and
9 * redistribution of this software, in source or object code forms, with or
10 * without modifications are expressly permitted by Whistle Communications;
11 * provided, however, that:
12 * 1. Any and all reproductions of the source or object code must include the
13 *    copyright notice above and the following disclaimer of warranties; and
14 * 2. No rights are granted, in any manner or form, to use Whistle
15 *    Communications, Inc. trademarks, including the mark "WHISTLE
16 *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
17 *    such appears in the above copyright notice or in the software.
18 *
19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
35 * OF SUCH DAMAGE.
36 */
37
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD: head/sys/boot/i386/libi386/spinconsole.c 276074 2014-12-22 19:10:11Z imp $");
40
41#include <stand.h>
42#include <bootstrap.h>
43
44extern void get_pos(int *x, int *y);
45extern void curs_move(int *_x, int *_y, int x, int y);
46extern void vidc_biosputchar(int c);
47
48static void	spinc_probe(struct console *cp);
49static int	spinc_init(int arg);
50static void	spinc_putchar(int c);
51static int	spinc_getchar(void);
52static int	spinc_ischar(void);
53
54struct console spinconsole = {
55	"spinconsole",
56	"spin port",
57	0,
58	spinc_probe,
59	spinc_init,
60	spinc_putchar,
61	spinc_getchar,
62	spinc_ischar
63};
64
65static void
66spinc_probe(struct console *cp)
67{
68	cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
69}
70
71static int
72spinc_init(int arg)
73{
74	return(0);
75}
76
77static void
78spinc_putchar(int c)
79{
80	static int curx, cury;
81	static unsigned tw_chars = 0x5C2D2F7C;    /* "\-/|" */
82	static time_t lasttime;
83	time_t now;
84
85	now = time(NULL);
86	if (now < (lasttime + 1))
87		return;
88	lasttime = now;
89#ifdef TERM_EMU
90	get_pos(&curx, &cury);
91	if (curx > 0)
92		curs_move(&curx, &cury, curx - 1, cury);
93#endif
94	vidc_biosputchar((char)tw_chars);
95	tw_chars = (tw_chars >> 8) | ((tw_chars & (unsigned long)0xFF) << 24);
96}
97
98static int
99spinc_getchar(void)
100{
101	return(-1);
102}
103
104static int
105spinc_ischar(void)
106{
107	return(0);
108}
109