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1 | /* |
2 | * ========== Copyright Header Begin ========================================== | |
3 | * | |
4 | * Hypervisor Software File: prom_console.c | |
5 | * | |
6 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
7 | * | |
8 | * - Do no alter or remove copyright notices | |
9 | * | |
10 | * - Redistribution and use of this software in source and binary forms, with | |
11 | * or without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistribution of source code must retain the above copyright notice, | |
15 | * this list of conditions and the following disclaimer. | |
16 | * | |
17 | * - Redistribution in binary form must reproduce the above copyright notice, | |
18 | * this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * | |
21 | * Neither the name of Sun Microsystems, Inc. or the names of contributors | |
22 | * may be used to endorse or promote products derived from this software | |
23 | * without specific prior written permission. | |
24 | * | |
25 | * This software is provided "AS IS," without a warranty of any kind. | |
26 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
27 | * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
28 | * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
29 | * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
30 | * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
31 | * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
32 | * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
33 | * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
34 | * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
35 | * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
36 | * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
37 | * | |
38 | * You acknowledge that this software is not designed, licensed or | |
39 | * intended for use in the design, construction, operation or maintenance of | |
40 | * any nuclear facility. | |
41 | * | |
42 | * ========== Copyright Header End ============================================ | |
43 | */ | |
44 | /* | |
45 | * Copyright (c) 2000-2003 Sun Microsystems, Inc. | |
46 | * All rights reserved. | |
47 | * Use is subject to license terms. | |
48 | */ | |
49 | ||
50 | #pragma ident "@(#)prom_console.c 1.1 00/08/07 SMI" | |
51 | ||
52 | #include <sys/promif.h> | |
53 | #include <sys/promimpl.h> | |
54 | ||
55 | /* | |
56 | * Return ihandle of stdin | |
57 | */ | |
58 | ihandle_t | |
59 | prom_stdin_ihandle(void) | |
60 | { | |
61 | static ihandle_t istdin = 0; | |
62 | static char *name = "stdin"; | |
63 | ||
64 | if (istdin) | |
65 | return (istdin); | |
66 | ||
67 | if (prom_getproplen(prom_chosennode(), name) != sizeof (ihandle_t)) { | |
68 | return (istdin = (ihandle_t)-1); | |
69 | } | |
70 | ||
71 | (void) prom_getprop(prom_chosennode(), name, (caddr_t)(&istdin)); | |
72 | istdin = prom_decode_int(istdin); | |
73 | ||
74 | return (istdin); | |
75 | } | |
76 | ||
77 | /* | |
78 | * Return ihandle of stdout | |
79 | */ | |
80 | ihandle_t | |
81 | prom_stdout_ihandle(void) | |
82 | { | |
83 | static ihandle_t istdout = 0; | |
84 | static char *name = "stdout"; | |
85 | ||
86 | if (istdout) | |
87 | return (istdout); | |
88 | ||
89 | if (prom_getproplen(prom_chosennode(), name) != sizeof (ihandle_t)) { | |
90 | return (istdout = (ihandle_t)-1); | |
91 | } | |
92 | ||
93 | (void) prom_getprop(prom_chosennode(), name, (caddr_t)(&istdout)); | |
94 | istdout = prom_decode_int(istdout); | |
95 | return (istdout); | |
96 | } | |
97 | ||
98 | uchar_t | |
99 | prom_getchar(void) | |
100 | { | |
101 | int32_t c; | |
102 | ||
103 | while ((c = prom_mayget()) == -1) | |
104 | ; | |
105 | return ((uchar_t)c); | |
106 | } | |
107 | ||
108 | int | |
109 | prom_mayget(void) | |
110 | { | |
111 | uint32_t rv; | |
112 | char c; | |
113 | ||
114 | rv = prom_read(prom_stdin_ihandle(), &c, 1); | |
115 | return (rv == 1 ? (int)c : -1); | |
116 | } | |
117 | ||
118 | void | |
119 | prom_putchar(char c) | |
120 | { | |
121 | while (prom_mayput(c) == -1) | |
122 | ; | |
123 | } | |
124 | ||
125 | int | |
126 | prom_mayput(char c) | |
127 | { | |
128 | /* | |
129 | * prom_write returns the number of bytes that were written | |
130 | */ | |
131 | if (prom_write(prom_stdout_ihandle(), &c, 1) > 0) | |
132 | return (0); | |
133 | else | |
134 | return (-1); | |
135 | } |