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Hello list, we want to use the tftp update functionality of u-boot to easily maintain our access points. We have the Gateworks' Laguna board with a Cavium cns3xxx SoC chip on it and a delivered u-boot v2008.10. For this, there are also the (extended) sources provided (see http://svn.gateworks.com/bsp/laguna/trunk/u-boot-2008.10). But; the automatic tftp update comes with version 2009.01...

So, at first I diffed the Gateworks' v2008.09 against v2008.09, rebased it to v2009.01 and fixed the conflicts (if someone is interested, I can provide a patch for v2009.01). Rebasing against v2011.03 produces a lot of conflicts, which I can't fix (because I run out of knowledge, what happens in the code).

If I now enable the CONFIG_UPDATE_TFTP flag (and LIB/LIBFDT), I got a missing CONFIG_SYS_BOOTMAPSZ. Ok, that's not so hard- I just defined it to a value (8<<20) to see if it's working- and yes it's compiling and working on the board. But how can I get the right value for it?

In the background, I use the openwrt-trunk with uLibc 0.9.32 for crosscompiling.

BR Christoph