Home | History | Annotate | Line # | Download | only in linux
cpufreq.h revision 1.3 
      1  1.3  riastrad /*	$NetBSD: cpufreq.h,v 1.3 2021/12/19 11:46:30 riastradh Exp $	*/
      2  1.2  riastrad 
      3  1.2  riastrad /*-
      4  1.2  riastrad  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  1.2  riastrad  * All rights reserved.
      6  1.2  riastrad  *
      7  1.2  riastrad  * This code is derived from software contributed to The NetBSD Foundation
      8  1.2  riastrad  * by Taylor R. Campbell.
      9  1.2  riastrad  *
     10  1.2  riastrad  * Redistribution and use in source and binary forms, with or without
     11  1.2  riastrad  * modification, are permitted provided that the following conditions
     12  1.2  riastrad  * are met:
     13  1.2  riastrad  * 1. Redistributions of source code must retain the above copyright
     14  1.2  riastrad  *    notice, this list of conditions and the following disclaimer.
     15  1.2  riastrad  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2  riastrad  *    notice, this list of conditions and the following disclaimer in the
     17  1.2  riastrad  *    documentation and/or other materials provided with the distribution.
     18  1.2  riastrad  *
     19  1.2  riastrad  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.2  riastrad  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.2  riastrad  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.2  riastrad  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.2  riastrad  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.2  riastrad  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.2  riastrad  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.2  riastrad  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.2  riastrad  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.2  riastrad  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.2  riastrad  * POSSIBILITY OF SUCH DAMAGE.
     30  1.2  riastrad  */
     31  1.2  riastrad 
     32  1.2  riastrad #ifndef _LINUX_CPUFREQ_H_
     33  1.2  riastrad #define _LINUX_CPUFREQ_H_
     34  1.2  riastrad 
     35  1.3  riastrad #include <sys/cpufreq.h>
     36  1.3  riastrad #include <sys/kmem.h>
     37  1.3  riastrad #include <machine/cpu.h>
     38  1.3  riastrad #include <machine/cpu_counter.h>
     39  1.3  riastrad 
     40  1.3  riastrad struct cpufreq_policy {
     41  1.3  riastrad 	struct {
     42  1.3  riastrad 		unsigned int max_freq;
     43  1.3  riastrad 	} cpuinfo;
     44  1.3  riastrad };
     45  1.3  riastrad 
     46  1.3  riastrad static inline struct cpufreq_policy *
     47  1.3  riastrad cpufreq_cpu_get(int x)
     48  1.3  riastrad {
     49  1.3  riastrad 	struct cpufreq_policy *policy = kmem_alloc(sizeof(*policy), KM_SLEEP);
     50  1.3  riastrad 	policy->cpuinfo.max_freq = cpufreq_get(curcpu());
     51  1.3  riastrad 	return policy;
     52  1.3  riastrad }
     53  1.3  riastrad 
     54  1.3  riastrad static inline void
     55  1.3  riastrad cpufreq_cpu_put(struct cpufreq_policy *policy)
     56  1.3  riastrad {
     57  1.3  riastrad 	kmem_free(policy, sizeof(*policy));
     58  1.3  riastrad }
     59  1.3  riastrad 
     60  1.3  riastrad #define tsc_khz cpu_frequency(curcpu())
     61  1.3  riastrad 
     62  1.2  riastrad #endif  /* _LINUX_CPUFREQ_H_ */
     63