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/* $NetBSD: cpufreq.h,v 1.5 2011/10/27 05:13:04 jruoho Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jukka Ruohonen.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYS_CPUFREQ_H_
#define _SYS_CPUFREQ_H_
#ifndef _KERNEL
#include <stdbool.h>
#endif
#ifdef _KERNEL
#ifndef _SYS_XCALL_H_
#include <sys/xcall.h>
#endif
#endif
#define CPUFREQ_NAME_MAX 16
#define CPUFREQ_STATE_MAX 32
#define CPUFREQ_LATENCY_MAX UINT32_MAX
#define CPUFREQ_STATE_ENABLED UINT32_MAX
#define CPUFREQ_STATE_DISABLED UINT32_MAX - 1
struct cpufreq_state {
uint32_t cfs_freq; /* MHz */
uint32_t cfs_power; /* mW */
uint32_t cfs_latency; /* usec */
uint32_t cfs_index;
uint32_t cfs_reserved[5];
};
struct cpufreq {
char cf_name[CPUFREQ_NAME_MAX];
uint32_t cf_state_count;
uint32_t cf_state_target;
uint32_t cf_state_current;
uint32_t cf_reserved[5];
u_int cf_index;
#ifdef _KERNEL
bool cf_mp;
bool cf_init;
void *cf_cookie;
xcfunc_t cf_get_freq;
xcfunc_t cf_set_freq;
uint32_t cf_state_saved;
struct cpufreq_state cf_state[CPUFREQ_STATE_MAX];
#endif /* _KERNEL */
};
#ifdef _KERNEL
void cpufreq_init(void);
int cpufreq_register(struct cpufreq *);
void cpufreq_deregister(void);
void cpufreq_suspend(struct cpu_info *);
void cpufreq_resume(struct cpu_info *);
uint32_t cpufreq_get(struct cpu_info *);
int cpufreq_get_backend(struct cpufreq *);
int cpufreq_get_state(uint32_t, struct cpufreq_state *);
int cpufreq_get_state_index(uint32_t, struct cpufreq_state *);
void cpufreq_set(struct cpu_info *, uint32_t);
void cpufreq_set_all(uint32_t);
#endif /* _KERNEL */
#endif /* _SYS_CPUFREQ_H_ */
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