1 /* $NetBSD: prom.c,v 1.3 1997/09/06 14:03:58 drochner Exp $ */
2
3 /*-
4 * Mach Operating System
5 * Copyright (c) 1992 Carnegie Mellon University
6 * All Rights Reserved.
7 *
8 * Permission to use, copy, modify and distribute this software and its
9 * documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
13 *
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17 *
18 * Carnegie Mellon requests users of this software to return to
19 *
20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
21 * School of Computer Science
22 * Carnegie Mellon University
23 * Pittsburgh PA 15213-3890
24 *
25 * any improvements or extensions that they make and grant Carnegie Mellon
26 * the rights to redistribute these changes.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/types.h>
33
34 #include "bootstrap.h"
35 #include "openfirm.h"
36
37 static void ofw_cons_probe(struct console *cp);
38 static int ofw_cons_init(int);
39 void ofw_cons_putchar(int);
40 int ofw_cons_getchar(void);
41 int ofw_cons_poll(void);
42
43 static ihandle_t stdin;
44 static ihandle_t stdout;
45
46 struct console ofwconsole = {
47 "ofw",
48 "Open Firmware console",
49 0,
50 ofw_cons_probe,
51 ofw_cons_init,
52 ofw_cons_putchar,
53 ofw_cons_getchar,
54 ofw_cons_poll,
55 };
56
57 static void
ofw_cons_probe(struct console * cp)58 ofw_cons_probe(struct console *cp)
59 {
60
61 OF_getprop(chosen, "stdin", &stdin, sizeof(stdin));
62 OF_getprop(chosen, "stdout", &stdout, sizeof(stdout));
63 cp->c_flags |= C_PRESENTIN|C_PRESENTOUT;
64 }
65
66 static int
ofw_cons_init(int arg)67 ofw_cons_init(int arg)
68 {
69 return 0;
70 }
71
72 void
ofw_cons_putchar(int c)73 ofw_cons_putchar(int c)
74 {
75 char cbuf;
76
77 if (c == '\n') {
78 cbuf = '\r';
79 OF_write(stdout, &cbuf, 1);
80 }
81
82 cbuf = c;
83 OF_write(stdout, &cbuf, 1);
84 }
85
86 static int saved_char = -1;
87
88 int
ofw_cons_getchar()89 ofw_cons_getchar()
90 {
91 unsigned char ch = '\0';
92 int l;
93
94 if (saved_char != -1) {
95 l = saved_char;
96 saved_char = -1;
97 return l;
98 }
99
100 if (OF_read(stdin, &ch, 1) > 0)
101 return (ch);
102
103 return (-1);
104 }
105
106 int
ofw_cons_poll()107 ofw_cons_poll()
108 {
109 unsigned char ch;
110
111 if (saved_char != -1)
112 return 1;
113
114 if (OF_read(stdin, &ch, 1) > 0) {
115 saved_char = ch;
116 return 1;
117 }
118
119 return 0;
120 }
121