[U-Boot] Uboot and memory test

Hi,

This is a question related to memory testing from within Uboot:

On a CPU (ppc476) there is 2 GB RAM which is tested in Uboot (the operating system uses this memory). On the same CPU there is an additional 256 MB memory chip which is used only by the IP-stack and not the operating system.

The question is, should this 256 MB memory be tested from Uboot or should the IP-stack test this memory?

What is the advantage/disadvantages?

Brs,

Markus