Date: Mon, 13 Jun 2011 21:31:59 +0000 (UTC)
From: johnlinn@comcast.net
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Message-ID: <315025466.1505794.1308000719987.JavaMail.root@sz0140a.emeryville.ca.mail.comcast.net>
In-Reply-To: <1347566644.1505253.1308000163643.JavaMail.root@sz0140a.emeryville.ca.mail.comcast.net>
Subject: DMA setup for ARM platform with hole low in memory
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 690
Lines: 13

I'm trying to decide the best way to setup this ARM platform DMA to deal with the fact that the lowest 512K of memory can not be DMAed into.  The rest of memory space is fine.

>From my digging and prototyping it seems like a DMA zone will do the job, but maybe there's an easier way. The DMA mask doesn't seem to really help with this hole in memory and would still need to be 0xFFFFFFFF it appears.

Am I missing the easier way?

Thanks,
John
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/