[U-Boot] BSS footprint of FAT very high - SPL issues

[Wolfgang Denk]

Dear "Bedia, Vaibhav",

In message <FCCFB4CDC6E5564B9182F639FC356087035FBED5FB at dbde02.ent.ti.com> you wrote:
>
> In that case how can network boot be supported in U-Boot? Is the expectation that the SPL image which gets downloaded to internal RAM inits SDRAM, relocates to it and then download any other image like a larger U-Boot or the OS image?

Can you please restrict your line length to some 70 or so characters?

At the moment, U-Boot it self assumes that it somehow got started as a
whole - either executing from reset (like when booting from NOR flash
or similar bootable memory regions), or by being loaded by some
secondary loader.  So far, we support NAND and OneNAND in such a mode.
Especially with NAND the restrictions may be severe - quite often the
SPL code has to fit in as little as 4 KiB, sometimes even in 2 KiB.

If you want SPL support for network booting, this needs to be added.
I am not sure if this really makes sense, though. Many devices today
have ROM code capable of reading boot images from USB or SDCard etc.,
so these are the "naturally supported" boot modes for such systems.
I haven't seen network boot in such a configuration yet.

If you add it, I guess the next steps will be support for WLAN booting
and IPv6.

Best regards,

Wolfgang Denk

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