skiconsole.c revision 267654 
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#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: releng/9.3/sys/boot/ia64/ski/skiconsole.c 113038 2003-04-03 21:36:33Z obrien $");
29
30#include <stand.h>
31
32#include "bootstrap.h"
33#include "libski.h"
34
35static void
36ski_cons_probe(struct console *cp)
37{
38	cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
39}
40
41static int
42ski_cons_init(int arg)
43{
44	ssc(0, 0, 0, 0, SSC_CONSOLE_INIT);
45	return 0;
46}
47
48void
49ski_cons_putchar(int c)
50{
51	ssc(c, 0, 0, 0, SSC_PUTCHAR);
52}
53
54static int pollchar = -1;
55
56int
57ski_cons_getchar()
58{
59	int c;
60
61	if (pollchar > 0) {
62		c = pollchar;
63		pollchar = -1;
64		return c;
65	}
66
67	do {
68		c = ssc(0, 0, 0, 0, SSC_GETCHAR);
69	} while (c == 0);
70
71	return c;
72}
73
74int
75ski_cons_poll()
76{
77	int c;
78	if (pollchar > 0)
79		return 1;
80	c = ssc(0, 0, 0, 0, SSC_GETCHAR);
81	if (!c)
82		return 0;
83	pollchar = c;
84	return 1;
85}
86
87struct console ski_console = {
88	"ski",
89	"ia64 SKI console",
90	0,
91	ski_cons_probe,
92	ski_cons_init,
93	ski_cons_putchar,
94	ski_cons_getchar,
95	ski_cons_poll
96};
97