Re: cache problem

[Rene B. <re...@we...>]

Roman Zippel wrote:

> 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 marke=
d
>> 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.


Hello,

Documentation/DMA-mapping.txt says that pci_alloc_consistent() can also=20
be used on machines that don`t have PCI-bus.


Ciao, Ren=E8