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 (c) 1990,1992-1994 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * XXX: Break this up into individual property lookups.
31 */
32
33 #include <sys/promif.h>
34 #include <sys/promimpl.h>
35 #include <sys/idprom.h>
36
37 /*
38 * Get idprom property from root node, return to callers buffer.
39 */
40
41 int
prom_getidprom(caddr_t addr,int size)42 prom_getidprom(caddr_t addr, int size)
43 {
44 u_char *cp, val = 0;
45 /*LINTED [idprom unused]*/
46 idprom_t idprom;
47 int i;
48 int length;
49
50 length = prom_getproplen(prom_rootnode(), OBP_IDPROM);
51 if (length == -1) {
52 prom_printf("Missing OBP idprom property.\n");
53 return (-1);
54 }
55
56 if (length > size) {
57 prom_printf("Buffer size too small.\n");
58 return (-1);
59 }
60
61 (void) prom_getprop(prom_rootnode(), OBP_IDPROM,
62 (caddr_t) addr);
63
64 /*
65 * Test the checksum for sanity
66 */
67 for (cp = (u_char *)addr, i = 0;
68 i < (sizeof (idprom) - sizeof (idprom.id_undef)); i++)
69 val ^= *cp++;
70
71 if (val != 0)
72 prom_printf("Warning: IDprom checksum error.\n");
73
74 return (0);
75 }
76