[U-Boot] Performance problems with gunzip
Detlev Zundel
dzu at denx.de
Fri Jan 22 16:20:08 CET 2010
Hi Andreas,
> thanks for the fast response. How do I enable data caches?
I fear this is not as easy as flipping a bit in a register. Depending
on the platform caches tend to be tied to the MMU, so enabling the
caches require setting up correct data structures for the MMU to work.
That's the non-trivial work.
Apart from that, there is CONFIG_CMD_CACHE which builds
common/cmd_cache.c. I see that at least two PXA250 platforms enable
this, so maybe simply try that?
Moreover, a quick qoogle showed that the (non-mainline) Gumstix verdex
(PXA270) U-Boot port has a dcache command:
http://docwiki.gumstix.org/index.php/U-Boot
Maybe you can reap the code from their repository. If you do, please
post it here ;)
Cheers
Detlev
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