[U-Boot] Environment "image" tool

[Alessio Sangalli]

Hi, is there a tool to create an "environemnt image" that I can flash to
my NAND?

I think I've seen a tool that takes a text file with an environment
setting per line, calculates the CRC and generates a binary that can be
transferred to the board (via tftp or other means) to be written with
"nand write".

Alternatively, is there a description of how the environment is read, my
U-Boot, so that I can write my own program to create such image?

Thanks!
bye
as