Re: cache problem

[Roman Z. <zi...@li...>]

Hi,

Rene Brothuhn wrote:

> As far as I know the standard interface to get some uncached mem is
> pci_alloc_consistent() as described in Documentation/DMA-mapping.txt.
> This seems to working on APUS, but I`m not sure if the TLB`s are marked
> as cache-inhibit.

No there aren't. First it's pci specific and it doesn't mention the
cache at all. If you look at arch/ppc/kernel/pci-dma.c, you see it's
just a __get_free_pages(), but you need a new mapping to get the new
cache mode.

bye, Roman