Hi Detlev, thanks for the help. I have tried CONFIG_CMD_CACHE but this doesn't work, because dcache_enable() is not implemented for PXA.
Then I tried to get the U-Boot source code for Gumstix verdex project, but I can't find it. Where can I download this? Regards, Andreas -----Ursprüngliche 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 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 -- There are three kinds of people in the world; those who can count and those who can't. -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: d...@denx.de _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
