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Date: Mon, 9 Jan 2006 10:53:39 -0200
From: Aristeu Sergio Rozanski Filho <aris@mandriva.com>
To: Kalle Pokki <kalle.pokki@iki.fi>
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Cc: linuxppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: Badness in dma_alloc_init
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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