writing environment in NAND flash

Vanalme Filip F.Vanalme at TELEVIC.com
Fri Feb 25 04:31:09 EST 2011

I have problems to save my environment settings. Although I set e.g. the MAC address and some other values and do the saveenv command, after reset, all settings have disappeared.
In the logging on the console port, I detected this :
"wrong crc on env
no valid environment found on /dev/env0. Using default environment"

That will be, of course, the cause why the settings disappear.
Further investigation with debugging enabled in nand_imx.c showed that Barebox reads 4 pages when starting up (0x80..0x83). That looks OK, because the environment's size is 6156 bytes. So, indeen 4 pages needed. However, when saving the environment, I only see appear one page write, i.e. on page 0x80. Of course, when reading back the four pages, the 2nd, 3rd and 4th page have all FF because they have never been written (causing a wrong CRC). Any idea why I only see 1 page write when saving the environment although the size is 6156 bytes ? Any hints where to look in the sources ?

Thanks in advance !


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