efi_console.c revision 113038 
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: head/sys/boot/efi/libefi/efi_console.c 113038 2003-04-03 21:36:33Z obrien $");
29
30#include <efi.h>
31#include <efilib.h>
32
33#include "bootstrap.h"
34
35static SIMPLE_TEXT_OUTPUT_INTERFACE	*conout;
36static SIMPLE_INPUT_INTERFACE		*conin;
37
38static void
39efi_cons_probe(struct console *cp)
40{
41	conout = ST->ConOut;
42	conin = ST->ConIn;
43	cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
44}
45
46static int
47efi_cons_init(int arg)
48{
49	return 0;
50}
51
52void
53efi_cons_putchar(int c)
54{
55	CHAR16 buf[2];
56
57	if (c == '\n')
58		efi_cons_putchar('\r');
59
60	buf[0] = c;
61	buf[1] = 0;
62
63	conout->OutputString(conout, buf);
64}
65
66int
67efi_cons_getchar()
68{
69	EFI_INPUT_KEY key;
70	EFI_STATUS status;
71	UINTN junk;
72
73	/* Try to read a key stroke. We wait for one if none is pending. */
74	status = conin->ReadKeyStroke(conin, &key);
75	if (status == EFI_NOT_READY) {
76		BS->WaitForEvent(1, &conin->WaitForKey, &junk);
77		status = conin->ReadKeyStroke(conin, &key);
78	}
79	return (key.UnicodeChar);
80}
81
82int
83efi_cons_poll()
84{
85	/* This can clear the signaled state. */
86	return (BS->CheckEvent(conin->WaitForKey) == EFI_SUCCESS);
87}
88
89struct console efi_console = {
90	"efi",
91	"EFI console",
92	0,
93	efi_cons_probe,
94	efi_cons_init,
95	efi_cons_putchar,
96	efi_cons_getchar,
97	efi_cons_poll
98};
99