cpupm_amd.c revision 8906:e559381f1e2b 
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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26/*
27 * AMD specific CPU power management support.
28 */
29
30#include <sys/x86_archext.h>
31#include <sys/cpu_acpi.h>
32#include <sys/pwrnow.h>
33
34boolean_t
35cpupm_amd_init(cpu_t *cp)
36{
37	cpupm_mach_state_t *mach_state =
38	    (cpupm_mach_state_t *)(cp->cpu_m.mcpu_pm_mach_state);
39
40	/* AMD? */
41	if (x86_vendor != X86_VENDOR_AMD)
42		return (B_FALSE);
43
44	/*
45	 * If we support PowerNow! on this processor, then set the
46	 * correct cma_ops for the processor.
47	 */
48	mach_state->ms_pstate.cma_ops = pwrnow_supported() ?
49	    &pwrnow_ops : NULL;
50
51	return (B_TRUE);
52}
53