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#!/bin/sh
#
# Modify the power profile based on AC line state. This script is
# usually called from devd(8).
#
# Arguments: 0x00 (AC offline, economy) or 0x01 (AC online, performance)
#
# $FreeBSD$
#
# PROVIDE: power_profile
# REQUIRE: FILESYSTEMS syslogd
# KEYWORD: nojail nostart
. /etc/rc.subr
name="power_profile"
stop_cmd=':'
LOGGER="logger -t power_profile -p daemon.notice"
# Set a given sysctl node to a value.
#
# Variables:
# $node: sysctl node to set with the new value
# $value: HIGH for the highest performance value, LOW for the best
# economy value, or the value itself.
# $highest_value: maximum value for this sysctl, when $value is "HIGH"
# $lowest_value: minimum value for this sysctl, when $value is "LOW"
#
sysctl_set()
{
# Check if the node exists
if [ -z "$(sysctl -n ${node} 2> /dev/null)" ]; then
return
fi
# Get the new value, checking for special types HIGH or LOW
case ${value} in
[Hh][Ii][Gg][Hh])
value=${highest_value}
;;
[Ll][Oo][Ww])
value=${lowest_value}
;;
[Nn][Oo][Nn][Ee])
return
;;
*)
;;
esac
# Set the desired value
if [ -n "${value}" ]; then
if ! sysctl ${node}=${value} > /dev/null 2>&1; then
warn "unable to set ${node}=${value}"
fi
fi
}
if [ $# -ne 1 ]; then
err 1 "Usage: $0 [0x00|0x01]"
fi
load_rc_config $name
# Find the next state (performance or economy).
state=$1
case ${state} in
0x01 | '')
${LOGGER} "changed to 'performance'"
profile="performance"
;;
0x00)
${LOGGER} "changed to 'economy'"
profile="economy"
;;
*)
echo "Usage: $0 [0x00|0x01]"
exit 1
esac
# Set the various sysctls based on the profile's values.
node="hw.acpi.cpu.cx_lowest"
highest_value="C1"
lowest_value="Cmax"
eval value=\$${profile}_cx_lowest
sysctl_set
node="dev.cpu.0.freq"
highest_value="`(sysctl -n dev.cpu.0.freq_levels | \
awk '{ split($0, a, "[/ ]"); print a[1] }' -) 2> /dev/null`"
lowest_value="`(sysctl -n dev.cpu.0.freq_levels | \
awk '{ split($0, a, "[/ ]"); print a[length(a) - 1] }' -) 2> /dev/null`"
eval value=\$${profile}_cpu_freq
sysctl_set
exit 0
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