From: Aristeu Sergio Rozanski Filho <aris@mandriva.com>
To: Kalle Pokki <kalle.pokki@iki.fi>
Cc: linuxppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: Badness in dma_alloc_init
Date: Mon, 9 Jan 2006 10:53:39 -0200 [thread overview]
Message-ID: <20060109125339.GA12997@oops.ghostprotocols.net> (raw)
In-Reply-To: <43C25787.4010204@iki.fi>
Hi!
> I'm having some trouble with the DMA allocation using Linux 2.6.14-rc2 +
> some platform modifications. Namely, the dma_alloc_coherent() function
> returns bogus virtual addresses causing machine check exceptions. At
> boot, the kernel complains there is something wrong, but I cannot figure
> out how to fix it. CONFIG_CONSISTENT_START is at its default value,
> 0xff100000. Any hints where to look further?
>
> Oh, this is a custom 8xx board. Has the support for DMA in 8xx been
> unstable at the time of pre-2.6.14?
probably your IMAP_ADDR is at 0xff000000, isn't it? if it is, please adjust
CONFIG_CONSISTENT_START to an address like 0xe0000000.
--
Aristeu
next prev parent reply other threads:[~2006-01-09 13:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-09 12:31 Badness in dma_alloc_init Kalle Pokki
2006-01-09 12:53 ` Aristeu Sergio Rozanski Filho [this message]
2006-01-09 13:35 ` Kalle Pokki
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