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 * CPU power management driver support for sun4u.
28 */
29#include <sys/ddi.h>
30#include <sys/sunddi.h>
31#include <sys/cpupm.h>
32#include <sys/cpudrv_mach.h>
33#include <sys/machsystm.h>
34
35/*
36 * Change CPU speed.
37 */
38int
39cpudrv_change_speed(cpudrv_devstate_t *cpudsp, cpudrv_pm_spd_t *new_spd)
40{
41	xc_one(cpudsp->cpu_id, (xcfunc_t *)cpu_change_speed, \
42	    (uint64_t)new_spd->speed, 0);
43	return (DDI_SUCCESS);
44}
45
46/*
47 * Determine the cpu_id for the CPU device.
48 */
49boolean_t
50cpudrv_get_cpu_id(dev_info_t *dip,  processorid_t *cpu_id)
51{
52	return (dip_to_cpu_id(dip, cpu_id) == DDI_SUCCESS);
53}
54
55/*
56 * A noop for this machine type.
57 */
58/* ARGSUSED */
59boolean_t
60cpudrv_power_ready(cpu_t *cp)
61{
62	return (B_TRUE);
63}
64
65/*
66 * A noop for this machine type.
67 */
68/* ARGSUSED */
69boolean_t
70cpudrv_is_governor_thread(cpudrv_pm_t *cpupm)
71{
72	return (B_FALSE);
73}
74
75/*
76 * A noop for this machine type.
77 */
78/*ARGSUSED*/
79boolean_t
80cpudrv_mach_init(cpudrv_devstate_t *cpudsp)
81{
82	return (B_TRUE);
83}
84
85/*
86 * On SPARC all instances support power management unless attach fails.
87 * In the case of attach failure, cpudrv_enabled will be false.
88 */
89/*ARGSUSED*/
90boolean_t
91cpudrv_is_enabled(cpudrv_devstate_t *cpudsp)
92{
93	return (cpudrv_enabled);
94}
95
96void
97cpudrv_set_supp_freqs(cpudrv_devstate_t *cpudsp)
98{
99	int		*speeds;
100	uint_t		nspeeds;
101
102	CPUDRV_GET_SPEEDS(cpudsp, speeds, nspeeds);
103	if (nspeeds == 0)
104		return;
105	cpupm_set_supp_freqs(cpudsp->cp, speeds, nspeeds);
106	CPUDRV_FREE_SPEEDS(speeds, nspeeds);
107}
108