U-Boot Configuration

For loading the kernel and rootfile system over the network, the U-Boot Configurations needs to be correctly set to match that of the TFTP and NFS servers. Refer to Host Setup for more details on setting up the Host System.

serverip

This should be the IP Addres of the Host which is running TFTP and NFS servers.


   setenv serverip 192.168.1.2

kernel

This should point to the kernel image stored within the TFTP server directory. Since our kernel image is being stored in /tftpboot/boot/uImage, we nedd to provide the full path excluding the toplevel TFTP directory as shown below:


   setenv kernel boot/uImage

nfsroot

This should point to the root filesystem directory as configured in Host Setup.


   setenv nfsroot /opt/poky/1.3/sysroots/cpu_3xx-poky-linux-gnueabi

Saving the Environment setting

The environment settings need to be saved otherwise they will be lost if the device is rebooted. Use the following command to save the environment settings.


   saveenv

There are two methods to load the kernel and root filesystem based on how the IP Address of the target is assigned and they are described below.

Using DHCP

To get the IP Address using DHCP run the following command.
```
   setenv autoload no; dhcp;
```
Wait for it to get a valid address. Once the IP address has been assigned run the following command to load the kernel and root filesystem over the network.
```
   run bootcmd_net
```

Using Static IP Address

Set the appropriate static IP Address using
```
   setenv ipaddr 192.168.1.10
```
Set the appropriate subnet mask using
```
   setenv netmask 255.255.255.0
```
If you want to save the IP address and netmask setting run the following command
```
   saveenv
```
Load the kernel and root filesystem over the network using
```
   run bootcmd_net
```