On Thursday 05 July 2007, Timur Tabi wrote:
> static int at91_pcm_mmap(struct snd_pcm_substream *substream,
> struct vm_area_struct *vma)
> {
> struct snd_pcm_runtime *runtime = substream->runtime;
>
> return dma_mmap_writecombine(substream->pcm->card->dev, vma,
> runtime->dma_area,
> runtime->dma_addr,
> runtime->dma_bytes);
> }
>
> There are no dma_mmap_x() functions in arch/powerpc. Can someone tell me
> what the powerpc
> equivalent to dma_mmap_writecombine() is?
Not sure exactly what arm does here, but it sounds like you want
to call remap_pfn_range with the _PAGE_NO_CACHE bit set in the
protection flags, and _PAGE_GUARDED not set.
Arnd <><
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