[U-Boot-Users] "How to erase the Flash used by u-boot"

[nreddy at netenrich.com]

Hi All,
We are developing one walnut405 based embedded system with U-boot and
Montavista linux.

Here customer is asking to give provision to erase U-boot from Kernel as
well as from existing U-boot when there is any updated U-Boot.

Currently i am erasing U-Boot from U-Boot only.
I do not know how to erase U-Boot from Kernel.


Here i have some fundamental doubts that ,
How to erase U-Boot from Kernel level?
How to access Physical address directly in Linux Kernel?

Please help me out ..........



Thanks in Advance.

Nagi Reddy