The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/cpufreq_if.m

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    1 #
    2 # Copyright (c) 2004 Nate Lawson
    3 # All rights reserved.
    4 #
    5 # Redistribution and use in source and binary forms, with or without
    6 # modification, are permitted provided that the following conditions
    7 # are met:
    8 # 1. Redistributions of source code must retain the above copyright
    9 #    notice, this list of conditions and the following disclaimer.
   10 # 2. Redistributions in binary form must reproduce the above copyright
   11 #    notice, this list of conditions and the following disclaimer in the
   12 #    documentation and/or other materials provided with the distribution.
   13 #
   14 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24 # SUCH DAMAGE.
   25 #
   26 # $FreeBSD: releng/10.1/sys/kern/cpufreq_if.m 142032 2005-02-18 00:23:36Z njl $
   27 #
   28 
   29 #include <sys/bus.h>
   30 
   31 INTERFACE cpufreq;
   32 
   33 HEADER {
   34         struct cf_level;
   35         struct cf_setting;
   36 };
   37 
   38 # cpufreq interface methods
   39 
   40 #
   41 # Set the current CPU frequency level.
   42 #
   43 METHOD int set {
   44         device_t                dev;
   45         const struct cf_level   *level;
   46         int                     priority;
   47 };
   48 
   49 #
   50 # Get the current active level.
   51 #
   52 METHOD int get {
   53         device_t                dev;
   54         struct cf_level         *level;
   55 };
   56 
   57 #
   58 # Get the current possible levels, based on all drivers.
   59 #
   60 METHOD int levels {
   61         device_t                dev;
   62         struct cf_level         *levels;
   63         int                     *count;
   64 };
   65 
   66 # Individual frequency driver methods
   67 
   68 #
   69 # Set an individual driver's setting.
   70 #
   71 METHOD int drv_set {
   72         device_t                dev;
   73         const struct cf_setting *set;
   74 };
   75 
   76 #
   77 # Get an individual driver's setting.
   78 #
   79 METHOD int drv_get {
   80         device_t                dev;
   81         struct cf_setting       *set;
   82 };
   83 
   84 #
   85 # Get the settings supported by a driver.
   86 #
   87 METHOD int drv_settings {
   88         device_t                dev;
   89         struct cf_setting       *sets;
   90         int                     *count;
   91 };
   92 
   93 #
   94 # Get an individual driver's type.
   95 #
   96 METHOD int drv_type {
   97         device_t                dev;
   98         int                     *type;
   99 };
  100 

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