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