On Mon, 4 Oct 2010 14:41:55 -0400 Michael Galime <[email protected]> wrote:
> Hi. > > > > I have a board which I am using Uboot on. Arm9, nand flash, etc. > > > > Currently the board has the uboot image and the ENV in one partition, > size 0x00200000. > > > > I would like to make another partition for the ENV so that if I have to > upgrade Uboot I don't lose my ENV. > > > > What size does the partition have to be? At a minimum, one block, so you can erase it independently of everything else. You may want to use CONFIG_ENV_RANGE to assign multiple blocks in case one of the blocks is bad, or you may want to use the env.oob mechanism to dynamically choose a good block for the environment when each board's NAND is first programmed (but be aware that you'll have to run "nand env.oob" again whenever you reflash block zero). > And where in the Uboot code do I change the memory location and size for > the env so I can rebuild Uboot and start using a new ENV partition? Assuming you mean the location in NAND flash, and not in memory, look in your board config header file. You should find CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, etc. -Scott _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
