<div class="gmail_extra"><div class="gmail_quote"><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
> 2.<br>
> 345 ENTRY(v7_dma_unmap_area)<br>
> 346         add     r1, r1, r0<br>
> 347         teq     r2, #DMA_TO_DEVICE<br>
> 348         bne     v7_dma_inv_range<br>
> 349         mov     pc, lr<br>
> 350 ENDPROC(v7_dma_unmap_area)<br>
><br>
> v7_dma_unmap_area, will invalidate corresponding cache line for<br>
> “DMA_FROM_DEVICE”. But, at v7_dma_map_area, the invalidate has been done.<br>
> Why do this again?<br>
<br>
</div>Cache prefetching.<br></blockquote><div>Speculative prefetch? <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="HOEnZb"><div class="h5"><br>
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