Messages in this thread | | | Date | Wed, 28 Jul 1999 12:42:39 -0500 (CDT) | From | <> | Subject | Re: Uncacheable memory? |
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Hi,
On Wed, 28 Jul 1999, Philip Blundell wrote:
> >I checked, and this doesn't appear to be implemented for the ARM > >EBSA-285 architecture. It is #defined to be a plain old ioremap. > > Ioremap'd memory is always uncached on ARM. But you need to be careful if you > use this on "real" (ie non-I/O) memory, especially on the EBSA-285 -- ioremap > adds in the IO_FUDGE_FACTOR and you will need to subtract it out again. > Alternatively you could use __ioremap but that might not buy you very much. > I think I'm going to use the method the SA1100 fb driver uses to map the RAM uncacheable. I should be able to make that stuff into a generic routine I can call to get uncacheable RAM. Thanks.
-- Kyle Mestery | StorageTek's Storage Networking Group mestery@visi.com | http://www.freebsd.org/ mestery@netwinder.org | http://www.netwinder.org/ Protect your right to privacy: www.freecrypto.org
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