Date: Thu, 25 Sep 2003 19:47:12 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: vjardin@free.fr Cc: hackers@freebsd.org Subject: Re: BUS DMA sync Message-ID: <20030925.194712.52249923.imp@bsdimp.com> In-Reply-To: <200309250014.53816.vjardin@free.fr> References: <200309242342.55788.vjardin@free.fr> <20030924215448.GF8404@elvis.mu.org> <200309250014.53816.vjardin@free.fr>
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In message: <200309250014.53816.vjardin@free.fr>
Vincent Jardin <vjardin@free.fr> writes:
: What's about PREREAD ? What kind of CPU synchronization is required prior a
: DMA read ? There is no cache during a device to host memory process, isn't it
: ?
There is on MIPS.
Warner
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