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) 1992, 1994, 1998 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/types.h>
30#include <sys/param.h>
31#include <sys/var.h>
32#include <sys/thread.h>
33#include <sys/cpuvar.h>
34#include <sys/kstat.h>
35#include <sys/uadmin.h>
36#include <sys/systm.h>
37#include <sys/errno.h>
38#include <sys/cmn_err.h>
39#include <sys/procset.h>
40#include <sys/processor.h>
41#include <sys/debug.h>
42
43/*
44 * processor_info(2) - return information on a processor.
45 */
46int
47processor_info(processorid_t cpun, processor_info_t *infop)
48{
49	cpu_t *cp;
50	processor_info_t temp;
51
52	mutex_enter(&cpu_lock);
53	if ((cp = cpu_get(cpun)) == NULL) {
54		mutex_exit(&cpu_lock);
55		return (set_errno(EINVAL));
56	}
57	bcopy(&cp->cpu_type_info, &temp, sizeof (temp));
58	mutex_exit(&cpu_lock);
59
60	/*
61	 * The spec indicates that the rest of the information is meaningless
62	 * if the CPU is offline, but if presented by the machine-dependent
63	 * layer, it is probably still accurate.  It seems OK to copy it all in
64	 * either case.
65	 */
66	if (copyout((caddr_t)&temp, (caddr_t)infop,
67	    sizeof (processor_info_t)))
68		return (set_errno(EFAULT));
69
70	return (0);
71}
72