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Questions on NOR flash layout for booting

Hi,

I'm using the DM816x/C6A816x/AM389x EVM, I'm trying to make the system boot from NOR. I read the wiki for the NOR flash layout: http://processors.wiki.ti.com/index.php/DM816x_AM389x_PSP_U-Boot#NOR_Layout

It shows that there are 4 sections: u-boot, ENV, Linux and FS.

From the wiki I know that I should place u-boot.bin into u-boot section, linux kernel uImage into Linux section, and the created jffs2 file system into the FS section.

But what should I put inside the ENV section?

I know that ENV stands for uboot environment variables, but I thought the u-boot's content is already covered in the u-boot section(first section)?