Nachricht-
Von: Detlev Zundel [mailto:d...@denx.de]
Gesendet: Freitag, 22. Januar 2010 16:20
An: A. Geisreiter
Cc: u-boot@lists.denx.de
Betreff: Re: AW: [U-Boot] Performance problems with gunzip
Hi Andreas,
thanks for the fast response. How do I enable data caches?
I fear this is not as easy
Hi Andreas,
I try to unzip a WinCE kernel with the U-Boot gunzip routine. It is working,
but it takes roughly 1min to uncompress a 10MB zip file.
I am working with a PXA270 platform. What could be the reason for the worst
performance?
Very likely the disabled instruction and data caches.
Hi Detlev,
thanks for the fast response. How do I enable data caches?
Regards,
Andreas
-Ursprüngliche Nachricht-
Von: Detlev Zundel [mailto:d...@denx.de]
Gesendet: Freitag, 22. Januar 2010 15:45
An: A. Geisreiter
Cc: u-boot@lists.denx.de
Betreff: Re: [U-Boot] Performance problems
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
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.
Not that difficult, either. You just need to fill the
Hi Alessandro,
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.
Not that difficult, either.
I never
I never said it was difficult, only non-trivial :)
Not trivial, actually.
I am looking forward to something like this for a long time now and I'm
sure other people will value it too, so thanks in advance!
It's still not working, but _I_ am working on it again after the weekend.
/alessandro
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