#!/bin/sh
# Set up an debian system on a ARM system under QEMU

color_red="\\033[1;31m"
color_green="\\033[1;32m"
color_black="\\033[1;38m"
color_reset="\\033[0;39m"

if [ "$1" = "-h" -o "$1" = "--help" ]; then
	echo "Usage: $0 [INSTALL_DIR] [HDD_SIZE]"
	exit
fi

if ! qemu --version > /dev/null; then
	echo "${color_red}QEMU not installed${color_reset}"
	exit
fi

cpu=$(qemu-system-arm -M versatilepb -cpu ? | grep arm1176  || qemu-system-arm -M versatilepb -cpu ? | grep arm1136-r2)
dir=${1-debian}
hdd=${2-2G}

if [ -z "$cpu" ]; then
	echo "${color_red}CPU not supportet by QEMU${color_reset}"
	exit
fi

if [ -e "$dir" ]; then
	echo "${color_red}Destination directory '$dir' already exists${color_reset}"
	exit
fi

echo -n $color_black
cat <<-EOF
	Install Debian for ARM processors on QEMU
	=========================================

	CPU:       $cpu
	hdd size:  $hdd
	
	Please attend this during the installation:
	- Continue the installation without kernel modules
	- ignore RAID and LVM error messages
	
	During the system will be installed, switch to console 2 and copy the kernel modules:
	  mkdir /target/lib/modules
	  cp -r /lib/modules/3.0.4-Raspi /target/lib/modules


EOF
echo -n $color_reset

mkdir $dir
cd $dir

wget "http://thoronir.net/raspi-dev/initrd-raspi.gz"
wget "http://thoronir.net/raspi-dev/kernel-raspi"

qemu-img create -f raw debian.hda $hdd

qemu-system-arm -m 256 -M versatilepb -cpu $cpu -hda debian.hda -kernel kernel-raspi -no-reboot -append "console=tty0 root=/dev/sda1 rw panic=5" -initrd initrd-raspi.gz

#mkdir initrd debian.hda1
#gunzip -c initrd-raspi.gz > cpio -i initrd
#sudo mount -o loop debian.hda debian.hda1     ## geht so nicht, da ja nur hda1 gemountet werden soll
#cp -r initrd/lib/modules/3.0.4-Raspi debian.hda1/lib/modules

echo -n $color_black
cat <<-EOF
	The installation is completed!

	Now the installed system will boot
	- If on every login a new password will be requested, you must set the system time, e.g.:
	  date -s "30 Sep 2011 19:00:00"
EOF
echo -n $color_reset

qemu-system-arm -m 256 -M versatilepb -cpu $cpu -hda debian.hda -kernel kernel-raspi -no-reboot -append "console=tty0 root=/dev/sda1 rw panic=5"