4624l1

Listing 1. Creating a Linux RD Image

#!/bin/sh
#---------------------------------------------------------------------------
# Create a Linux RD image
#
#  Based upon the Bootdisk HOW-TO.  Additional support for configuration and 
#  networking.
#
#  M. Tim Jones (mtj@mtjones.com)
#
#  The emphasis is size, so the minimal libraries are introduced and all 
#  binaries and libraries are stripped.
#
#  At the end of the build, a file 'image.map' is created which contains the
#  sizes of the overall ramdisk image and individual size of the subdirs in
#  the ramdisk (such as /bin, /lib, etc.).  This is useful in understanding
#  the size that results from introducing new elements.
#
#---------------------------------------------------------------------------
#
export PATH=$PATH:/opt12/hardhat/devkit/ppc/8xx/bin
STRIP=ppc_8xx-strip
#
# Configuration parameters [may need tailoring or your environment]
#
LIB=/root/fwall12/target/lib
BIN=/root/fwall12/target/bin
ETC=../../target/etc
RDSIZE=4000
#
# General Cleanup...
#
rm -f /tmp/ramdisk.image
rm -f /tmp/ramdisk.image.gz
#
# Create the blank ramdisk image
#
dd if=/dev/zero of=/tmp/ramdisk.image bs=1024 count=$RDSIZE
#
# Make it a mountable file system (ext2)
#
/sbin/mke2fs -F -m 0 -b 1024 /tmp/ramdisk.image $RDSIZE
#
# Mount it using the loop device (allows the file to be treated as a device)
#
mount /tmp/ramdisk.image /mnt -t ext2 -o loop=/dev/loop0
#
# Fill in the /bin section
#
mkdir /mnt/bin
echo Copying the bin elements
#
$STRIP $BIN/bash -o /mnt/bin/bash
pushd /mnt/bin
ln -s bash sh
popd
$STRIP $BIN/ls -o /mnt/bin/ls
$STRIP $BIN/pwd -o /mnt/bin/pwd
$STRIP $BIN/cat -o /mnt/bin/cat
$STRIP $BIN/mount -o /mnt/bin/mount
$STRIP $BIN/login -o /mnt/bin/login
$STRIP $BIN/ps -o /mnt/bin/ps
$STRIP $BIN/hostname -o /mnt/bin/hostname
$STRIP $BIN/cp -o /mnt/bin/cp
$STRIP $BIN/rm -o /mnt/bin/rm
$STRIP $BIN/mv -o /mnt/bin/mv
$STRIP $BIN/init -o /mnt/bin/init
$STRIP $BIN/echo -o /mnt/bin/echo
$STRIP $BIN/killall -o /mnt/bin/killall
$STRIP $BIN/mkdir -o /mnt/bin/mkdir
cp testapp /mnt/bin/testapp
#
# Add in networking stuff
#
$STRIP $BIN/ifconfig -o /mnt/bin/ifconfig
$STRIP $BIN/inetd -o /mnt/bin/inetd
$STRIP $BIN/telnet -o /mnt/bin/telnet
$STRIP $BIN/ftp -o /mnt/bin/ftp
$STRIP $BIN/telnetd -o /mnt/bin/telnetd
$STRIP $BIN/ftpd -o /mnt/bin/ftpd
$STRIP $BIN/ping -o /mnt/bin/ping
$STRIP $BIN/route -o /mnt/bin/route
$STRIP $BIN/netstat -o /mnt/bin/netstat
#
# Create the sbin soft link (to bin)
#
pushd /mnt
ln -s bin sbin
popd
#
# Create and fill in the required /dev sections
#
mkdir /mnt/dev
echo Building the dev elements
#
mknod /mnt/dev/kmem c 1 2
chmod 640 /mnt/dev/kmem
mknod /mnt/dev/mem c 1 1
chmod 640 /mnt/dev/mem
mknod /mnt/dev/null c 1 3
chmod 666 /mnt/dev/null
mknod /mnt/dev/tty c 5 0
chmod 666 /mnt/dev/tty
mknod /mnt/dev/ttyS0 c 4 64
chmod 600 /mnt/dev/ttyS0
mknod /mnt/dev/ttyS1 c 4 65
chmod 600 /mnt/dev/ttyS1
mknod /mnt/dev/eeprom c 80 246
chmod 644 /mnt/dev/eeprom
pushd /mnt/dev
ln -s ttyS0 console
popd
cp -dpR /opt/hardhat/devkit/ppc/8xx/target/dev/initctl /mnt/dev/initctl
#
# Create and fill in the required etc sections
#  [These may be tailored in your HHL tree.]
#
mkdir /mnt/etc
#
cp $ETC/fstab /mnt/etc
cp $ETC/group /mnt/etc
cp $ETC/inittab /mnt/etc
cp $ETC/mtab /mnt/etc
cp $ETC/passwd /mnt/etc
cp $ETC/hosts /mnt/etc
cp $ETC/services /mnt/etc
cp $ETC/resolv.conf /mnt/etc
cp $ETC/inetd.conf /mnt/etc
cp $ETC/protocols /mnt/etc
#
# Create the rc.sysinit inline
#
# Note, the RPX Net has two ethernet interfaces (eth0 = Hub, eth1 FEC).
#
cp rc.sysinit /mnt/etc/rc.sysinit
#
# Create and fill in the lib section
#
mkdir /mnt/lib
echo Copying the lib elements
#
$STRIP $LIB/libc-2.1.3.so -o /mnt/lib/libc-2.1.3.so
$STRIP $LIB/ld-2.1.3.so -o /mnt/lib/ld-2.1.3.so
$STRIP $LIB/libtermcap.so.2.0.8 -o /mnt/lib/libtermcap.so.2.0.8
$STRIP $LIB/libdl-2.1.3.so -o /mnt/lib/libdl-2.1.3.so
$STRIP $LIB/libproc.so.2.0.0 -o /mnt/lib/libproc.so.2.0.0
$STRIP $LIB/libcrypt.so.1 -o /mnt/lib/libcrypt.so.1
$STRIP $LIB/librt-2.1.3.so -o /mnt/lib/librt-2.1.3.so
$STRIP $LIB/libutil-2.1.3.so -o /mnt/lib/libutil-2.1.3.so
$STRIP $LIB/libm-2.1.3.so -o /mnt/lib/libm-2.1.3.so
$STRIP $LIB/libpthread-0.8.so -o /mnt/lib/libpthread-0.8.so
$STRIP $LIB/libnss_files-2.1.3.so -o /mnt/lib/libnss_files-2.1.3.so
$STRIP $LIB/libresolv-2.1.3.so -o /mnt/lib/libresolv-2.1.3.so
#
pushd /mnt/lib
ln -s libc-2.1.3.so libc.so.6
ln -s ld-2.1.3.so ld.so.1
ln -s libdl-2.1.3.so libdl.so.2
ln -s libdl.so.2 libdl.so
ln -s libutil-2.1.3.so libutil.so.1
ln -s libutil.so.1 libutil.so
ln -s libm-2.1.3.so libm.so.6
ln -s libm.so.6 libm.so
ln -s libtermcap.so.2.0.8 libtermcap.so.2
ln -s libpthread-0.8.so libpthread.so.0
ln -s libpthread.so.0 libpthread.so
ln -s libnss_files-2.1.3.so libnss_files.so.2
ln -s libnss_files.so.2 libnss_files.so
ln -s libresolv-2.1.3.so libresolv.so.2
ln -s libresolv.so.2 libresolv.so
popd
#
# Workaround for odd library problem...
#
pushd /mnt/lib
mkdir -p /mnt/opt/hardhat/devkit/ppc/8xx/powerpc-hardhat-linux
cd /mnt/opt/hardhat/devkit/ppc/8xx/powerpc-hardhat-linux
ln -s /lib lib
popd
#
# Create the /var section
#
echo Copying the var elements
#
mkdir /mnt/var
mkdir /mnt/var/lock
mkdir /mnt/var/lock/subsys
mkdir /mnt/var/log/
mkdir /mnt/var/log/subsys
#
mkdir /mnt/var/run
#
# Create the /proc section
#
mkdir /mnt/proc
#
# Create the /tmp section
#
mkdir /mnt/tmp
#
# Summarize the size of the entire tree
#
echo "The Entire tree size is "
echo "------------------------"
du -s -b /mnt
echo "------------------------"
#
echo "-----------------------------------------------" > image.map
echo "Here are the sizes for the ramdisk image:" >> image.map
du -s -h /mnt/lib >> image.map
du -s -h /mnt/bin >> image.map
du -s -h /mnt/etc >> image.map
du -s -h /mnt/dev >> image.map
du -s -h /mnt/var >> image.map
echo "-----------------" >> image.map
du -s -h /mnt >> image.map
#
# Finish up the ramdisk image
#
umount /mnt
gzip /tmp/ramdisk.image
ln -sf /tmp/ramdisk.image.gz ./arch/ppc/mbxboot/ramdisk.image.gz
#
# Build the kernel initrd image
#
make zImage.initrd
#
# Bind the final ramdisk image with the EP burner image to allow burning onto 
# the board.  [Contact EP for the burner.srec and srecfix2 images.]
#
BURNLOC=FF840000
TARGET=./fImage.mot
./zsrec arch/ppc/mbxboot/zImage.initrd > zImage.srec
IINFO=`ppc_8xx-objdump zImage.srec -h`
I=0
# The objdump creates .sec1 <len> <start> somewhere in the image.
for FI in ${IINFO}
do
	case "$I" in
	0)
		[ $FI = ".sec1" ] && I=1
		;;
	1)
		LEN=$FI
		I=$((I+1))
		;;
	2)
		START=$FI
		I=$((I+1))
		;;
	esac
done
SREC=`echo 00100090${START}${BURNLOC}${LEN}`
#
./srecfix2 001000800010009000000000 ${SREC} <burner.srec >${TARGET}
./srecfix2 -n <zImage.srec >>${TARGET}
chmod og+w ${TARGET}
cp -f ${TARGET} /tftpboot