Home | History | Annotate | Line # | Download | only in linux 
      1 /*	$NetBSD: cpufreq.h,v 1.4 2021/12/19 11:52:47 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LINUX_CPUFREQ_H_
     33 #define _LINUX_CPUFREQ_H_
     34 
     35 #include <sys/cpu.h>
     36 #include <sys/cpufreq.h>
     37 #include <sys/kmem.h>
     38 
     39 #include <machine/cpu_counter.h>
     40 
     41 struct cpufreq_policy {
     42 	struct {
     43 		unsigned int max_freq;
     44 	} cpuinfo;
     45 };
     46 
     47 static inline struct cpufreq_policy *
     48 cpufreq_cpu_get(int x)
     49 {
     50 	struct cpufreq_policy *policy = kmem_alloc(sizeof(*policy), KM_SLEEP);
     51 	policy->cpuinfo.max_freq = cpufreq_get(curcpu());
     52 	return policy;
     53 }
     54 
     55 static inline void
     56 cpufreq_cpu_put(struct cpufreq_policy *policy)
     57 {
     58 	kmem_free(policy, sizeof(*policy));
     59 }
     60 
     61 #define tsc_khz cpu_frequency(curcpu())
     62 
     63 #endif  /* _LINUX_CPUFREQ_H_ */
     64