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From: "Richard Hendricks" <ra6353@email.sps.mot.com>
To: "linuxppc-embedded@lists.linuxppc.org" 
	<linuxppc-embedded@lists.linuxppc.org>
Subject: Re: USB driver for MPC850/823
Date: Thu, 09 Mar 2000 09:34:02 -0600	[thread overview]
Message-ID: <38C7C46A.D995D187@email.sps.mot.com> (raw)
In-Reply-To: 38C7368A.7B28E61E@netx4.com




Dan Malek wrote:
>
> Just make sure kmalloc() gives you something that is properly
> aligned, as some CPM functions have rather large alignment boundaries.
> When allocated in this way, you have to chase down the pte's and modify
> the cache attributes yourself if desired.

The most famous case of this is the IDMA buffer descriptors.  Unlike
everything elses buffer descriptors, the IDMA buffer descriptors must be
16 byte aligned, not 8.

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

  parent reply	other threads:[~2000-03-09 15:34 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-03-08  9:35 USB driver for MPC850/823 Bjvrn Lundberg
2000-03-08 23:53 ` Steve Calfee
2000-03-09  5:28   ` Dan Malek
2000-03-09 12:30     ` Björn Lundberg
2000-03-09 15:34     ` Richard Hendricks [this message]
2000-03-09 16:30       ` Dan Malek
2000-03-09 17:14         ` Richard Hendricks

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