/etc/init.d/loadcpufreq is in cpufrequtils 008-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 | #!/bin/sh
### BEGIN INIT INFO
# Provides: loadcpufreq
# Required-Start: $remote_fs $syslog
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop:
# Short-Description: Load kernel modules needed to enable cpufreq scaling
# Description: Make it possible to save power by reducing
# the CPU speed when there is little to do.
### END INIT INFO
# License: GNU General Public License.
#
# Based on scripts found in the powernowd package version
# 0.97-1ubuntu6 on Ubuntu.
#
# This script is an interim solution until the default Debian packages
# will load the proper kernel modules at boot time. Track #396117,
# #342014 and #367307 to see status on this.
# <URL:http://0pointer.de/blog/projects/dmi-based-module-autoloading.html>
# claim the later kernels support autoloading of these modules, so I
# guess In the future this script can be dropped. [pere 2007-05-12]
PATH=/sbin:/bin:/usr/sbin:/usr/bin
NAME=loadcpufreq
# Get lsb functions
. /lib/lsb/init-functions
[ -f /etc/default/rcS ] && . /etc/default/rcS
# Set a default value
ENABLE="true"
[ -f /etc/default/loadcpufreq ] && . /etc/default/loadcpufreq
set -e
# if not enabled then exit gracefully
[ "$ENABLE" = "true" ] || exit 0
MODPROBE="modprobe -b"
load_detected_cpufreq_modules() {
#if /usr/sbin/laptop-detect; then LAPTOP=1; fi
CPUINFO=/proc/cpuinfo
IOPORTS=/proc/ioports
if [ ! -f $CPUINFO ] ; then
echo "$CPUINFO not detected..." >&2
return
fi
MODEL_NAME=$(grep '^model name' "$CPUINFO" | head -1 | sed -e 's/^.*: //;')
MODEL_ID=$(grep -E '^model[[:space:]]+:' "$CPUINFO" | head -1 | sed -e 's/^.*: //;')
CPU=$(grep -E '^cpud[^:]+:' "$CPUINFO" | head -1 | sed -e 's/^.*: //;')
VENDOR_ID=$(grep -E '^vendor_id[^:]+:' "$CPUINFO" | head -1 | sed -e 's/^.*: //;')
CPU_FAMILY=$(sed -e '/^cpu family/ {s/.*: //;p;Q};d' $CPUINFO)
MODULE=
MODULE_FALLBACK=acpi-cpufreq
# Two modules for PIII-M depending the chipset.
# modprobe speedstep-ich$EXT || modprobe speestep-smi$EXT
# would be another way
if [ -f $IOPORTS ] && grep -q 'Intel .*ICH' $IOPORTS ; then
PIII_MODULE=speedstep-ich
else
PIII_MODULE=speedstep-smi
fi
case "$VENDOR_ID" in
GenuineIntel*)
# If the CPU has the est flag, it supports enhanced
# speedstep and should use the acpi-cpufreq driver
if [ "$(grep est $CPUINFO)" ]; then
MODULE=acpi-cpufreq
elif [ $CPU_FAMILY = 15 ]; then
# Right. Check if it's a P4 without est.
# Could be speedstep-ich, or could be p4-clockmod.
MODULE=speedstep-ich;
# Disabled for now - the latency tends to be bad
# enough to make it fairly pointless.
# echo "FREQDRIVER=p4-clockmod" >/etc/default/powernowd
# to override this
# if [ $LAPTOP = "1" ]; then
# MODULE_FALLBACK=p4-clockmod;
# fi
else
# So it doesn't have Enhanced Speedstep, and it's not a
# P4. It could be a Speedstep PIII, or it may be
# unsupported. There's no terribly good programmatic way
# of telling.
case "$MODEL_NAME" in
Intel\(R\)\ Pentium\(R\)\ III\ Mobile\ CPU*)
MODULE=$PIII_MODULE
;;
# JD: says this works with cpufreq_userspace
Mobile\ Intel\(R\)\ Pentium\(R\)\ III\ CPU\ -\ M*)
MODULE=$PIII_MODULE
;;
# https://bugzilla.ubuntu.com/show_bug.cgi?id=4262
# UNCONFIRMED
Pentium\ III\ \(Coppermine\)*)
MODULE=$PIII_MODULE
;;
esac
fi
;;
AuthenticAMD*)
# Hurrah. This is nice and easy.
case $CPU_FAMILY in
5)
# K6
MODULE=powernow-k6
;;
6)
# K7
MODULE=powernow-k7
;;
15|16|17|18|20|21)
# K8
MODULE=powernow-k8
;;
esac
;;
CentaurHauls*)
# VIA
if [ $CPU_FAMILY = 6 ]; then
case $MODEL_ID in
10) # VIA C7 VIA Esther
# try acpi_cpufreq as
# suggested in the kernel
# configuration help
MODULE=acpi_cpufreq
;;
*)
MODULE=longhaul
;;
esac
fi
;;
GenuineTMx86*)
# Transmeta
if [ "$(grep longrun $CPUINFO)" ]; then
MODULE=longrun
fi
;;
esac
}
load_modules() {
#build a list of current modules so we don't load a module twice
LIST=$(/sbin/lsmod|awk '!/Module/ {print $1}')
#get list of available modules (governors and helpers)
LOC="/lib/modules/$(uname -r)/kernel/drivers/cpufreq"
if [ -d $LOC ]; then
MODAVAIL=$( ( find $LOC -type f -name "cpufreq_*.o" -printf "basename %f .o\n"; \
find $LOC -type f -name "cpufreq_*.ko" -printf "basename %f .ko\n" ) | /bin/sh)
else
MODAVAIL=""
fi
#echo "Loading cpufreq modules:"
for mod in $MODAVAIL; do
# echo " $mod"
echo $LIST| grep -q -w "$mod" || $MODPROBE $mod >/dev/null || /bin/true
done
#cpufreq is built in on powerpc; just return
if [ "$(uname -m)" = "ppc" ]; then
return 0
fi
#new style detection system
if [ ! "$FREQDRIVER" = "" ]; then
# user overridden value in /etc/default/loadcpufreq
$MODPROBE "$FREQDRIVER"
MODULE="$FREQDRIVER"
else
load_detected_cpufreq_modules
if [ ! -z "$MODULE" ] || [ ! -z "$MODULE_FALLBACK" ] ; then
if [ ! -z "$MODULE" ] && $MODPROBE "$MODULE" 2>/dev/null ; then
:
elif $MODPROBE "$MODULE_FALLBACK" 2>/dev/null ; then
MODULE="$MODULE_FALLBACK"
else
unset MODULE
fi
fi
fi
}
check_kernel() {
CPUFREQ=/sys/devices/system/cpu/cpu0/cpufreq
if [ -z "$MODULE" ] || ([ -f "$CPUFREQ/scaling_governor" ] && \
[ -f "$CPUFREQ/scaling_available_governors" ])
then
return 0
else
return 1
fi
}
case "$1" in
start)
log_action_begin_msg "Loading cpufreq kernel modules"
[ -f /proc/modules ] && load_modules
if check_kernel ; then
[ -z "$MODULE" ] && MODULE="none"
log_action_end_msg 0 "$MODULE"
else
log_action_end_msg 1
fi
;;
stop)
;;
restart|force-reload)
$0 stop
sleep 1
$0 start
#echo "$NAME."
;;
*)
N=/etc/init.d/$NAME
log_success_msg "Usage: $N {start|stop|restart|force-reload}" >&2
exit 1
;;
esac
exit 0
|