Architectures/ARM/PlatformSheevaplug

= How To: Running Fedora-ARM on Sheevaplug =

Introduction
The SheevaPlug is a development platform, targeted for use as a plug computer, and designed to run network-based software services. It features a Kirkwood Series SoC with an embedded Marvell Sheeva™ CPU core running at 1.2 GHz.

Technical Specifications

 * Power: 	2.3w idle no attached devices, 7.0w running at 100% CPU utilization
 * CPU: 	       Marvell Kirkwood 88F6281 ARM Based, 1Ghz - 2Ghz processor
 * Memory: 	512MB SDRAM, 512MB Flash
 * Display: 	none
 * Connectivity: USB 2.0, SD, Gigabit Network,JTAG mini USB
 * Dimensions: 	110 x 69.5 x 48.5 (mm)

Setup Kernel Image
You can either simply use a pre-built kernel image or build your own from source.

Pre-built Kernel Image
You can get the following pre-built kernel image for Sheevaplug: http://ftp.linux.org.uk/pub/linux/arm/fedora/platforms/sheevaplug/uImage-2.6.30-sheevaplug

Build Kernel Image From Source
You will need to have an ARM cross-compiler. If you do not have one, download one from CodeSourcery's web-site, install it and ensure that is it in your path.

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

You can also use the Fedora  cross toolchain  that we provide.

Download the Linux kernel (I have tested with 2.6.30), and build it for kirkwood_defconfig.

$ cd linux-2.6/ $ make kirkwood_defconfig $ make uImage

Copy the kernel over tftp
Setup tftp server on your host machine as follows:

Now on the Sheevaplug's uboot prompt, tftp the kernel over to the Sheevaplug as: Marvell>> dhcp Marvell>> set serverip Marvell>> tftpboot 0x6400000 uImage-2.6.30-sheevaplug Replace with your host's IP address.

Once your kernel cmdline settings are done (as mentioned below), you can boot into the kernel as

Marvell>> bootm 0x6400000

if your linux kernel doesn't boot don't worry, try the settings listed bellow and tftp uImage again. setenv arcNumber 2097 setenv mainlineLinux yes saveenv

Kernel cmdline parameters for NFS setup
While booting the kernel, pass the following cmdline options to ensure bootup over NFS. This assumes that you have the root filesystem in /mnt/ARM_FS/

root=/dev/nfs rw nfsroot= :/mnt/ARM_FS/ ip=dhcp

RFS over USB drive
Details about USB boot are available at:   HOWTO: Sheevaplug Fedora USB Boot

Details about SD card boot are available at:   HOWTO: Sheevaplug Fedora SD card Boot

Saving uImage into NAND flash
[root@fedora-arm ~]# cat /proc/mtd dev:   size   erasesize  name mtd0: 00100000 00020000 "u-boot" mtd1: 00400000 00020000 "uImage" mtd2: 1fb00000 00020000 "root"

don't touch mtd0 or you will need a JTAG cable to write it again and make your sheeva Lord again.

mtd1 is the uImage, let we write it again with fedora kernel.

wget -Nc http://ftp.linux.org.uk/pub/linux/arm/fedora/platforms/sheevaplug/uImage-2.6.30-sheevaplug nandwrite –p /dev/mtd1 uImage-2.6.30-sheevaplug

after writing it, you don't need to tftp the uimage anymore