Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 9 Sep 2003 15:06:35 -0700 | From | Matt Porter <> | Subject | Re: Problem with remap_page_range |
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On Wed, Sep 10, 2003 at 09:54:20AM +1200, Dmytro Bablinyuk wrote: > > > > > >> if (remap_page_range(vma->vm_start, > >> DSP_ADDR, > >> size, > >> vma->vm_page_prot > >> )) > >> > >> > > > >Your remap call isn't adding _PAGE_NO_CACHE and _PAGE_GUARDED flags > >like ioremap_nocache()/ioremap() do on PPC. You'll get bad results > >because of the ordering and cache issues resulting from not using > >these PTE flags. In 2.6, these can be added using pgprot_noncached() > >that is defined per-arch. > > > > > > > Thank you Matt, > > Coud you please give me en example on how to add these flags to remap in > kernel 2.4.21 (powerpc). > It seems I could not find these flags available in my kernel.
They're defined in include/asm-ppc/pgtable.h
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