Upgrading SheevaPlug's U-Boot

This page describes how to install a new version of U-Boot on your SheevaPlug. U-Boot is the boot loader used on the SheevaPlug.

First of all, check which version of U-Boot is installed on your SheevaPlug to find out whether you have to perform this upgrade. Connect to U-Boot using the serial console and type:

version

This will show the version of U-Boot on your SheevaPlug. The important part is the Marvell version at the end of the line.

If you have to upgrade U-Boot, download the U-Boot 3.4.27+pingtoo binary and save it as uboot.bin.

There are different options to upgrade U-Boot on your SheevaPlug. If you have a TFTP server, I recommend the first option. If you don't have a TFTP server, you can copy the U-Boot binary to a USB stick and load it from there.

TFTP: First of all, copy the file uboot.bin to your TFTP server. Then start your SheevaPlug, connect the serial console and type the following commands:
```
setenv serverip 192.168.1.2 # IP of your TFTP server
setenv ipaddr 192.168.1.200
bubt uboot.bin
```
The upgrade process will ask whether you want to change the environment:
```
**Warning**
If U-Boot Endiannes is going to change (LE->BE or BE->LE),
Then Env parameters should be overridden..
Override Env parameters? (y/n) n
```
Make sure to answer "n" here.
USB: First of all, copy the U-Boot binary uboot.bin to a USB stick formated with the FAT filesystem. Then plug the USB stick into your SheevaPlug, connect the serial console and type the following commands:
```
usb start
fatload usb 0:1 0x0800000 uboot.bin
nand erase 0x0 0xa0000
nand write 0x0800000 0x0 0xa0000
```

Regardless of how you installed U-Boot, you now have to restart your machine to load the new version of U-Boot:

reset

Go back to my Debian on SheevaPlug page.