#!/bin/bash

# Mount /boot read only
mount -o remount,ro /boot

# Load bbserial
echo 3f201000.serial > /sys/bus/amba/drivers/uart-pl011/unbind
modprobe -r bbserial
modprobe bbserial

# Set SPI GPIO mode
gpio mode 27 alt3

# Create browser memory limited cgroup
if [ -d sys/fs/cgroup/memory ]; then
    CGROUP=/sys/fs/cgroup/memory/chrome
    mkdir $CGROUP
    chown -R pi:pi $CGROUP
    echo 650000000 > $CGROUP/memory.soft_limit_in_bytes
    echo 750000000 > $CGROUP/memory.limit_in_bytes
fi

# Reload udev
/etc/init.d/udev restart

# Stop boot splash so it doesn't interfere with X if GPU enabled and to save CPU
plymouth quit

# Start X in /home/pi
cd /home/pi
sudo -u pi startx