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# Copyright (C) 2012, Linaro Limited.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# Author: Amit Pundir <amit.pundir@linaro.org>
# Modified-by: Naresh Kamboju <naresh.kamboju@linaro.org>
#
usage()
{
echo ""
echo "usage: $0 -c <cpu number> [Optional Arguments...]"
echo "Options: -c operate on this cpu, this option can be specified multiple times"
echo ""
echo "Example: $0 -c 0 -c 1 ... -c $large_cpu_number"
exit 1
}
check_kernel_oops()
{
KERNEL_ERR=`dmesg | grep "Unable to handle kernel "`
if [ -n "$KERNEL_ERR" ]; then
echo "Kernel OOPS. Abort!!"
exit 1
fi
}
insert_bl_module()
{
ANDROID_MOD_PATH=/system/modules
UBUNTU_MOD_PATH=/lib/modules/`uname -r`/kernel/drivers/cpufreq
if [ -d $ANDROID_MOD_PATH ]; then
MOD_LOCATION=$ANDROID_MOD_PATH/arm-bl-cpufreq.ko
else if [ -d $UBUNTU_MOD_PATH ]; then
MOD_LOCATION=$UBUNTU_MOD_PATH/arm-bl-cpufreq.ko
else
echo "ERROR: No arm-bl-cpufreq.ko module found"
exit 1
fi
fi
CPU_FREQ_KM=`lsmod | grep cpufreq | awk '{print $1}'`
if [ -z "$CPU_FREQ_KM" ]; then
insmod $MOD_LOCATION
fi
check_kernel_oops
}
switch()
{
CUR_FREQ=`cat /sys/devices/system/cpu/cpu"$CPU_NUM"/cpufreq/cpuinfo_cur_freq`
if [ -z $CUR_FREQ ]; then
echo "Unable to get current operating frequency"
exit 1
fi
if [ "$CUR_FREQ" -eq "$LITTLE" ]; then
echo "cpu$CPU_NUM is LITTLE"
else if [ "$CUR_FREQ" -eq "$BIG" ]; then
echo "cpu$CPU_NUM is big. Switching to LITTLE.."
bl-agitator -f little -c $CPU_NUM
ERR_CODE=$?
if [ $ERR_CODE -ne 0 ]; then
echo "bigLITTLE switcher failed for cpu$CPU_NUM. Abort!!"
exit 1
else
echo "cpu$CPU_NUM successfully switched to LITTLE."
fi
else if [ "$CUR_FREQ" -lt "$BIG" ]; then
if [ "$CUR_FREQ" -gt "$LITTLE" ]; then
echo "cpu$CPU_NUM is big. Switching to LITTLE.."
bl-agitator -f little -c $CPU_NUM
ERR_CODE=$?
if [ $ERR_CODE -ne 0 ]; then
echo "bigLITTLE switcher failed for cpu$CPU_NUM. Abort!!"
exit 1
else
echo "cpu$CPU_NUM successfully switched to LITTLE."
fi
fi
else
echo "cpu$CPU_NUM operating at Current Frequency = $CUR_FREQ"
exit 1
fi
fi
fi
}
TOTAL_ACTIVE_CPUS=`ls /sys/devices/system/cpu/cpu*/online | wc -l`
large_cpu_number=$((TOTAL_ACTIVE_CPUS-1))
if [ $(echo "$2" | grep -E "^[0-$large_cpu_number]+$") ]; then
echo "Running $0 $1 $2"
else
echo "Error: Specify the number of CPU core (0-$large_cpu_number) to be switched to the desired frequency"
usage
fi
# insert bl module is intended for RTSM
MODEL=`cat /proc/device-tree/model`
if [ "$MODEL" = "RTSM_VE_CortexA15x4-A7x4" ]; then
echo "insert bl module from boot-a7.sh"
insert_bl_module
fi
BIG=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq`
LITTLE=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq`
while [ "$1" ]; do
case "$1" in
-c|--cpu-num)
if [ -z "$2" ]; then
echo "Error: Specify the CPU core (0-$large_cpu_number) to be switched to the desired frequency"
usage
fi
if [ $(echo "$2" | grep -E "^[0-$large_cpu_number]+$") ]; then
CPU_NUM=$2;
switch
shift;
else
usage
fi
;;
-h | --help | *)
usage
;;
esac
shift;
done
check_kernel_oops
exit 0
|
