Re: [PATCH v2] MIPS: c-r4k: Invalidate BMIPS5000 ZSCM prefetch lines

Thomas Bogendoerfer
2020-03-11T21:44:45Z

On Wed, Mar 11, 2020 at 01:54:23PM -0700, Florian Fainelli wrote:
> On 2/7/20 2:33 PM, Kamal Dasu wrote:
> > Zephyr secondary cache is 256KB, 128B lines. 32B sectors. A secondary cache
> > line can contain two instruction cache lines (64B), or four data cache
> > lines (32B). Hardware prefetch Cache detects stream access, and prefetches
> > ahead of processor access. Add support to invalidate BMIPS5000 cpu zephyr
> > secondary cache module (ZSCM) on DMA from device so that data returned is
> > coherent during DMA read operations.
> >
> > Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
>
> Thomas can review and apply this patch? Thank you!

looks good to me. I only wonder whether r4k_dma_cache_wbinv() also
needs this ?

Thomas.

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