[U-Boot] Meaning of CONFIG_SYS_BOOTMAPSZ/cns3xxx port to v2009.01

[Christoph König]

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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
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