1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/promif.h>
30 #include <sys/promimpl.h>
31
32 /*
33 * Return a character string in buf,buflen representing the running
34 * version of the firmware. Systems that have no concept of such a
35 * string may return the string "unknown".
36 *
37 * Return the actual length of the string, including the NULL terminator.
38 * Copy at most buflen bytes into the caller's buffer, always providing
39 * NULL termination.
40 *
41 * Returns the actual length of the string, plus copies data in the callers
42 * buf copying at most buflen bytes. Returns -1 if an internal error occurs.
43 */
44
45 int
prom_version_name(char * buf,int buflen)46 prom_version_name(char *buf, int buflen)
47 {
48 pnode_t nodeid;
49 int proplen;
50 char *unknown = "unknown";
51
52 *buf = *(buf + buflen - 1) = (char)0; /* Force NULL termination */
53
54 /*
55 * On sun4u systems, the /openprom "version" property
56 * contains the running version of the prom. Some older
57 * pre-FCS proms may not have the "version" property, so
58 * in that case we just return "unknown".
59 */
60
61 nodeid = prom_finddevice("/openprom");
62 if (nodeid == (pnode_t)-1)
63 return (-1);
64
65 proplen = prom_bounded_getprop(nodeid, "version", buf, buflen - 1);
66 if (proplen <= 0) {
67 (void) prom_strncpy(buf, unknown, buflen - 1);
68 return (prom_strlen(unknown) + 1);
69 }
70
71 return (proplen);
72 }
73