On Mon, 1 Oct 2007, veerasena reddy wrote:
> In linux-2.6.18 (for MIPS24KE processor):
> suppose if i want to do flush only then which API i
> should use?
`flush' is fuzzy terminology: some people mean invalidate, others mean
write back, others mean both.
> Similarly, if i want to do invalidation only which API
> i should use?
dma_cache_inv().
> --- Geert Uytterhoeven <[email protected]> wrote:
>
> > On Mon, 1 Oct 2007, veerasena reddy wrote:
> > > I have ported Linux-2.6.18 kernel on MIPS24KE
> > > processor. I am using write back cache policy.
> > >
> > > Could you please guide me under what cases the
> > below
> > > cache API's are being used:
> > > - dma_cache_wback_inv() : Could you explain what
> > > exactly this function does
> >
> > It does both write back and invalidate.
> >
> > > - dma_cache_wback() : This function write back the
> > > cache data to memory
> > > - dma_cache_inv : This function invalidate the
> > cache
> > > tags. so subsequent access will fetch from memory.
> >
> > Note that 2.6.18 is old. The above functions are
> > intended to be removed.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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