LCOM1920-T02G10

/*        $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_ */