Subject: Re: dmamap_sync function a no-op..?
To: None <>
From: Izumi Tsutsui <>
List: tech-kern
Date: 10/19/2001 20:17:04
In article <> wrote:

> While browsing code, I realized that for  i386/pci case bus_dmamap_sync
> function is a no-op. Is that so...? If so, why..? Is that ok for memory
> which has not been dmamem_alloce'd with DMA_COHERENT flag... (e.g. user
> space) ?

On i386 architecture, all DMA-cache coherency is handled by hardware
for backward compatibility.
Izumi Tsutsui