= Ubuntu Maverick on USB (minimal rootfs) =

== Generating the rootfs ==

At your host (using Maverick) install the rootstock package:
$ sudo apt-get install rootstock

Then identify the latest kernel image for OMAP 4 at http://ports.ubuntu.com/ubuntu-ports/pool/main/l/linux-ti-omap4/.
In my case, http://ports.ubuntu.com/ubuntu-ports/pool/main/l/linux-ti-omap4/linux-image-2.6.35-903-omap4_2.6.35-903.12_armel.deb.

Run rootstock, giving the correct paramters to generate a maverick image:
$ sudo rootstock --fqdn panda-maverick --login ubuntu --password ubuntu --serial ttyO2 --components "main universe multiverse" --kernel-image http://ports.ubuntu.com/ubuntu-ports/pool/main/l/linux-ti-omap4/linux-image-2.6.35-903-omap4_2.6.35-903.12_armel.deb

After running rootstock your rootfs will be at your current directory, called armel-rootfs-<DATE>.tgz

Now just extract the rootfs at your USB disk partition, preferred with an ext3 FS.

== Generating the boot partition ==

To be able to boot your Panda you'll need the X-Loader, U-Boot, Kernel and Initrd and a boot script file.

X-Loader:
 - Download http://ports.ubuntu.com/ubuntu-ports/pool/main/x/x-loader-omap4/x-loader-omap4_L24.9git20100901-0ubuntu1_armel.deb
 - Extract it with dpkg (dpkg -X x-loader-omap4.deb .)
 - Copy the MLO file

U-Boot:
 - Download http://ports.ubuntu.com/ubuntu-ports/pool/main/u/u-boot-linaro/u-boot-linaro-omap4-panda_2010.09~rc1.1-0ubuntu3_armel.deb
 - Extract it with dpkg (dpkg -X u-boot.deb .)
 - Copy the u-boot.bin file

Kernel:
 - After generating the rootfs with rootstock you'll find a file like vmlinuz-2.6.35-903-omap4 at the same directory you generated the rootfs
 - Install uboot-mkimage
 - Generate the uImage: mkimage -A arm -O linux -T kernel -C none -a 0x80008000 -e 0x80008000 -n "Linux" -d vmlinuz-2.6.35-903-omap4 uImage
 - Copy the uImage file

Initrd:
 - After generating the rootfs with rootstock you'll find a file like initrd.img-2.6.35-903-omap4 at the same directory you generated the rootfs
 - Generate the uInitrd: mkimage -A arm -O linux -T ramdisk -C none -a 0 -e 0 -n initramfs -d initrd.img-2.6.35-903-omap4 uInitrd
 - Copy the uInitrd file

boot.scr:
 - Set up a file called boot.script with the following content:
"""
        fatload mmc 0:1 0x80000000 uImage
        fatload mmc 0:1 0x81600000 uInitrd
        setenv bootargs ro elevator=noop vram=32M root=/dev/sda1 fixrtc console=ttyO2,115200 mem=460M@0x80000000 mem=256M@0xA0000000
        bootm 0x80000000 0x81600000
"""
 - Change the root paramter if needed
 - Generate the boot.scr file: mkimage -A arm -T script -C none -n "Ubuntu boot script" -d boot.script boot.scr
 - Copy the boot.scr file

Grab a SD card, create the first partition as a FAT 32 one and copy the files u-boot.bin, MLO, uImage, uInitrd and boot.scr on it.