1 /* $NetBSD: efi_console.c,v 1.4 2009/07/20 04:59:03 kiyohara Exp $ */
2
3 /*-
4 * Copyright (c) 2000 Doug Rabson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 /* __FBSDID("$FreeBSD: src/sys/boot/efi/libefi/efi_console.c,v 1.5 2004/03/09 04:00:33 marcel Exp $"); */
31
32 #include <efi.h>
33 #include <efilib.h>
34 #include <lib/libsa/stand.h>
35 #include <lib/libsa/loadfile.h>
36
37 #include "bootstrap.h"
38
39 static SIMPLE_TEXT_OUTPUT_INTERFACE *conout;
40 static SIMPLE_INPUT_INTERFACE *conin;
41
42 static void
efi_cons_probe(struct console * cp)43 efi_cons_probe(struct console *cp)
44 {
45 conout = ST->ConOut;
46 conin = ST->ConIn;
47 cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
48 }
49
50 static int
efi_cons_init(int arg)51 efi_cons_init(int arg)
52 {
53 conout->SetAttribute(conout, EFI_TEXT_ATTR(EFI_LIGHTGRAY, EFI_BLACK));
54 return 0;
55 }
56
57 void
efi_cons_putchar(int c)58 efi_cons_putchar(int c)
59 {
60 CHAR16 buf[2];
61
62 if (c == '\n')
63 efi_cons_putchar('\r');
64
65 buf[0] = c;
66 buf[1] = 0;
67
68 conout->OutputString(conout, buf);
69 }
70
71 int
efi_cons_getchar(void)72 efi_cons_getchar(void)
73 {
74 EFI_INPUT_KEY key;
75 EFI_STATUS status;
76 UINTN junk;
77
78 /* Try to read a key stroke. We wait for one if none is pending. */
79 status = conin->ReadKeyStroke(conin, &key);
80 if (status == EFI_NOT_READY) {
81 BS->WaitForEvent(1, &conin->WaitForKey, &junk);
82 status = conin->ReadKeyStroke(conin, &key);
83 }
84 return (key.UnicodeChar);
85 }
86
87 int
efi_cons_poll(void)88 efi_cons_poll(void)
89 {
90 /* This can clear the signaled state. */
91 return (BS->CheckEvent(conin->WaitForKey) == EFI_SUCCESS);
92 }
93
94 struct console efi_console = {
95 "efi",
96 "EFI console",
97 0,
98 efi_cons_probe,
99 efi_cons_init,
100 efi_cons_putchar,
101 efi_cons_getchar,
102 efi_cons_poll
103 };
104