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