1 /*-
2  * Copyright (c) 2011 Google, Inc.
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("$FreeBSD$");
29 
30 #include <stand.h>
31 #include <sys/font.h>
32 #include "bootstrap.h"
33 #include "libuserboot.h"
34 
35 int console;
36 
37 static struct console *userboot_comconsp;
38 
39 static void userboot_cons_probe(struct console *cp);
40 static int userboot_cons_init(int);
41 static void userboot_comcons_probe(struct console *cp);
42 static int userboot_comcons_init(int);
43 static void userboot_cons_putchar(int);
44 static int userboot_cons_getchar(void);
45 static int userboot_cons_poll(void);
46 
47 struct console userboot_console = {
48 	"userboot",
49 	"userboot",
50 	0,
51 	userboot_cons_probe,
52 	userboot_cons_init,
53 	userboot_cons_putchar,
54 	userboot_cons_getchar,
55 	userboot_cons_poll,
56 };
57 
58 /*
59  * Provide a simple alias to allow loader scripts to set the
60  * console to comconsole without resulting in an error
61  */
62 struct console userboot_comconsole = {
63 	"comconsole",
64 	"comconsole",
65 	0,
66 	userboot_comcons_probe,
67 	userboot_comcons_init,
68 	userboot_cons_putchar,
69 	userboot_cons_getchar,
70 	userboot_cons_poll,
71 };
72 
73 static void
74 userboot_cons_probe(struct console *cp)
75 {
76 
77 	cp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
78 }
79 
80 static int
81 userboot_cons_init(int arg)
82 {
83 
84 	return (0);
85 }
86 
87 static void
88 userboot_comcons_probe(struct console *cp)
89 {
90 
91 	/*
92 	 * Save the console pointer so the comcons_init routine
93 	 * can set the C_PRESENT* flags. They are not set
94 	 * here to allow the existing userboot console to
95 	 * be elected the default.
96 	 */
97 	userboot_comconsp = cp;
98 }
99 
100 static int
101 userboot_comcons_init(int arg)
102 {
103 
104 	/*
105 	 * Set the C_PRESENT* flags to allow the comconsole
106 	 * to be selected as the active console
107 	 */
108 	userboot_comconsp->c_flags |= (C_PRESENTIN | C_PRESENTOUT);
109 	return (0);
110 }
111 
112 static void
113 userboot_cons_putchar(int c)
114 {
115 
116         CALLBACK(putc, c);
117 }
118 
119 static int
120 userboot_cons_getchar()
121 {
122 
123 	return (CALLBACK(getc));
124 }
125 
126 static int
127 userboot_cons_poll()
128 {
129 
130 	return (CALLBACK(poll));
131 }
132