Re: [U-Boot] [PATCH 1/2] integratorap: disable dcache

2011-07-15 Thread Linus Walleij
On Fri, Jul 15, 2011 at 9:42 AM, Heiko Schocher wrote: >> Heiko, Alessandro, do you have any hints on how to go about flushing >> and disabling the D-cache in bootm for ARM920T? It doesn't seem to >> work on this ARM CPU chip in its current form... > > Hmm.. trying bootm with actual u-boot on a d

Re: [U-Boot] [PATCH 1/2] integratorap: disable dcache

2011-07-15 Thread Stefan Roese
Hi Laurence, On Friday 15 July 2011 10:54:41 Laurence Withers wrote: > On Fri, Jul 15, 2011 at 09:42:53AM +0200, Heiko Schocher wrote: > > Hmm.. trying bootm with actual u-boot on a davinci (arm926ejs) based > > board, there I couldn;t use the Davinci-EMAC (if I disable the dcache > > it works ...

Re: [U-Boot] [PATCH 1/2] integratorap: disable dcache

2011-07-15 Thread Laurence Withers
On Fri, Jul 15, 2011 at 09:42:53AM +0200, Heiko Schocher wrote: > Hmm.. trying bootm with actual u-boot on a davinci (arm926ejs) based > board, there I couldn;t use the Davinci-EMAC (if I disable the dcache > it works ...) I can confirm there are some cache coherency problems with the DaVinci EMAC

Re: [U-Boot] [PATCH 1/2] integratorap: disable dcache

2011-07-15 Thread Heiko Schocher
Hello Linus, Linus Walleij wrote: > On Thu, Jul 14, 2011 at 1:39 PM, Wolfgang Denk wrote: > >> Sorry, but again I have to point out that I really dislike papering >> over existing bugs. If the disable D-cache in bootm does not work, >> _this_ should be analyzed and fixed instead of globally dis

Re: [U-Boot] [PATCH 1/2] integratorap: disable dcache

2011-07-14 Thread Linus Walleij
On Thu, Jul 14, 2011 at 1:39 PM, Wolfgang Denk wrote: > Sorry, but again I have to point out that I really dislike papering > over existing bugs.  If the disable D-cache in bootm does not work, > _this_ should be analyzed and fixed instead of globally disabling he > data cache. No problem, I did

Re: [U-Boot] [PATCH 1/2] integratorap: disable dcache

2011-07-14 Thread Wolfgang Denk
Dear Linus Walleij, In message <1310598267-9711-1-git-send-email-linus.wall...@linaro.org> you wrote: > The Integrator AP with CM920T (ARM920T) does not boot without > D-cache disabled throughout, the actual problem comes at "bootm", > at this point U-Boot tries to disable D-cache which doesn't w

[U-Boot] [PATCH 1/2] integratorap: disable dcache

2011-07-13 Thread Linus Walleij
The Integrator AP with CM920T (ARM920T) does not boot without D-cache disabled throughout, the actual problem comes at "bootm", at this point U-Boot tries to disable D-cache which doesn't work on this machine for some reason. The result is usually an illegal instruction trap or similar as the PC go