skiconsole.c revision 83364 
1/*-
2 * Copyright (c) 2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#ifndef lint
28static const char rcsid[] =
29  "$FreeBSD: head/sys/boot/ia64/ski/skiconsole.c 83364 2001-09-12 08:34:27Z dfr $";
30#endif /* not lint */
31
32#include <stand.h>
33
34#include "bootstrap.h"
35#include "libski.h"
36
37static void
38ski_cons_probe(struct console *cp)
39{
40	cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
41}
42
43static int
44ski_cons_init(int arg)
45{
46	ssc(0, 0, 0, 0, SSC_CONSOLE_INIT);
47	return 0;
48}
49
50void
51ski_cons_putchar(int c)
52{
53	ssc(c, 0, 0, 0, SSC_PUTCHAR);
54}
55
56static int pollchar = -1;
57
58int
59ski_cons_getchar()
60{
61	int c;
62
63	if (pollchar > 0) {
64		c = pollchar;
65		pollchar = -1;
66		return c;
67	}
68
69	do {
70		c = ssc(0, 0, 0, 0, SSC_GETCHAR);
71	} while (c == 0);
72
73	return c;
74}
75
76int
77ski_cons_poll()
78{
79	int c;
80	if (pollchar > 0)
81		return 1;
82	c = ssc(0, 0, 0, 0, SSC_GETCHAR);
83	if (!c)
84		return 0;
85	pollchar = c;
86	return 1;
87}
88
89struct console ski_console = {
90	"ski",
91	"ia64 SKI console",
92	0,
93	ski_cons_probe,
94	ski_cons_init,
95	ski_cons_putchar,
96	ski_cons_getchar,
97	ski_cons_poll
98};
99