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 /*
30 * Return our machine address in the single argument.
31 */
32
33 #include <sys/promif.h>
34 #include <sys/promimpl.h>
35 #include <sys/idprom.h>
36
37 /*ARGSUSED*/
38 int
prom_getmacaddr(ihandle_t hd,caddr_t ea)39 prom_getmacaddr(ihandle_t hd, caddr_t ea)
40 {
41 idprom_t idprom;
42 pnode_t macnodeid;
43
44 /*
45 * Look for the 'mac-address' property in the device node
46 * associated with the ihandle 'hd'. This handles the
47 * cases when we booted from the network device, using either
48 * the platform mac address or a local mac address. This
49 * code will always return whichever mac-address was used by the
50 * firmware (local or platform, depending on nvram settings).
51 */
52 macnodeid = prom_getphandle(hd);
53 if (macnodeid != OBP_BADNODE) {
54 if (prom_getproplen(macnodeid, OBP_MAC_ADDR) != -1) {
55 (void) prom_getprop(macnodeid, OBP_MAC_ADDR, ea);
56 return (0);
57 }
58 }
59
60 /*
61 * The code above, should have taken care of the case
62 * when we booted from the device ... otherwise, as a fallback
63 * case, return the system mac address from the idprom.
64 * This code (idprom) is SMCC (and compatibles) platform-centric.
65 * This code always returns the platform mac address.
66 */
67 if (prom_getidprom((caddr_t)&idprom, sizeof (idprom)) == 0) {
68 char *f = (char *)idprom.id_ether;
69 char *t = ea;
70 int i;
71
72 for (i = 0; i < sizeof (idprom.id_ether); ++i)
73 *t++ = *f++;
74
75 return (0);
76 } else
77 return (-1); /* our world must be starting to explode */
78 }
79