Build Boot-loader Image

Download a source copy from the mini2440 u-boot project into the /usr/src/bootloader directory and decompress the zip file.

gzip -cd dev-mini2440-stable.tar.gz |tar xvf –

A new directory 'mini2440' is created.

Optionally, change the directory name and make a reference link to the bootloader directory.

mv mini2440 mini2440-1.3.2

ln -s mini2440-1.3.2 u-boot

Create a u-boot configuration file for the target system.

cd u-boot

make clean

ARCH=arm make mini2440_config

Build the bootloader image

ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- make

cp -rf u-boot.bin /var/lib/tftpboot

When finish without errors, the u-boot.bin file will be used to flash the u-boot image.

Build Kernel Image

Download a source copy from mini2440 kernel project into the /usr/src/kernels directory and decompress the zip file.

gzip -cd mini2440-stable.tar.gz |tar xvf –

A new directory 'mini2440' is created.

Optionally, change the directory name and create a reference link to the kernel directory.

mv mini2440 mini2440-2.6.32.7

ln -s mini2440-2.6.32.7 arm-linux

Create a kernel configuration file base on the old config_mini2440_n35 file from an earlier version eg. linux-2.6.29 from the Mini2440 package.

cd arm-linux

make clean

cp /usr/src/kernels/linux-2.6.29/config_mini2440_n35 ./.config

ARCH=arm make oldconfig

Press enter to select all the default settings, when finish a new .config file is generated while the old one is save in the .config.old.

Optionally, create a default configuration file if you don't have an existing .config file, this will produce the largest general-purpose configuration.

ARCH=arm make mini2440_defconfig

Change the kernel configuration setting below.

ARCH=arm make menuconfig

Go to 'File Systems' --> 'Network File Systems' --> Select 'NFS client support for NFS' and 'Root file system on NFS'

--- Network File Systems

<*> NFS client support

[*] NFS client support for NFS version 3

[*] NFS client support for the NFSv3 ACL protocol extension

[*] NFS client support for NFS version 4 (EXPERIMENTAL)

[ ] NFS client support for NFSv4.1 (DEVELOPER ONLY)

[*] Root file system on NFS

< > NFS server support

Go to 'Networking Support' --> 'Networking Options' --> Select the 'IP: kernel level autoconfiguration

[*] IP: kernel level autoconfiguration

[*] IP: DHCP support

[*] IP: BOOTP support

[*] IP: RARP support

Go to 'File System' --> 'Pseudo filesystems' --> Select 'Virtual memory file system support'

[*] /proc file system support

[*] Sysctl support (/proc/sys)

[*] Enable /proc page monitoring

[*] sysfs file system support

[*] Virtual memory file system support (former shm fs)

[*] Tmpfs POSIX Access Control Lists

Build the kernel image.

ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- make zImage

cp -rf arch/arm/boot/zImage /var/lib/tftpboot

Build the kernel modules, if there are modules setup in the configuration file.

ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- make modules

ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- make modules_install

Finally, compressed the kernel image to include checksum and header records require for use with u-boot.

mkimage -A arm -O linux -T kernel -C none -a 0x30008000 -e 0x30008000 -d ./zImage ./uImage

Image Name: Created: Tue Mar 2 22:51:28 2010

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 2053096 Bytes = 2004.98 kB = 1.96 MB

Load Address: 30008000

Entry Point: 30008000

When finish without errors, the uImage file will be used to flash the kernel image.

Build System Tools and Utilities

Download a source copy from busybox into the /usr/src/toolchain directory and decompress the zip file.

cd /usr/src/toolchain bzip2 -dc busybox-1.16.0.tar.bz2 |tar xvf -

A new directory 'busybox-1.16.0' is created.

Make a reference link to the busybox directory.

ln -s busybox-1.16.0 busybox

Create a busybox configuration file base on the old fa.config file from an earlier version eg. busybox-1.13.3 from the Mini2440 package.

cd busybox

make clean

cp /usr/src/toolchain/busybox-1.13.3/fa.config ./.config

ARCH=arm CC=arm-linux-gcc-4.4.1 make oldconfig

Press enter to select all the default settings, when finish a new .config file is generated while the old one is save in the .config.old.

Optionally, create a default configuration file if you don't have an existing fa.config file , this will produce the largest general-purpose configuration.

ARCH=arm CC=arm-linux-gcc-4.4.1 make oldconfig

Change the configuration setting below.

make menuconfig

Go to 'Busybox Settings' --> 'Installation Options' --> Change the busybox installation prefix to './_install'

[ ] Don't use /usr

Applets links (as soft-links) --->

(./_install) BusyBox installation prefix

Go to 'Busybox Settings' --> 'Build Options' --> Change the cross compiler prefix to 'arm-linux'

[ ] Build BusyBox as a static binary (no shared libs)

[ ] Build BusyBox as a position independent executable

[ ] Force NOMMU build [ ] Build shared libbusybox

[*] Build with Large File Support (for accessing files > 2 GB)

(arm-linux-) Cross Compiler prefix

() Additional CFLAGS

Build the busybox system.

ARCH=arm CC=arm-linux-gcc-4.4.1 make

ARCH=arm CC=arm-linux-gcc-4.4.1 make install

When finish without errors, the _install system folder will be used tobuild the root filesystem.