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Date: Fri, 07 Oct 2005 19:47:29 +0400
From: Vitaly Bordug <vbordug@ru.mvista.com>
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To: Alex Zeffertt <ajz@cambridgebroadband.com>
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Cc: linuxppc-embedded list <linuxppc-embedded@ozlabs.org>
Subject: Re: Oops accessing BCSR on 8272ADS
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Alex Zeffertt wrote:
> Hi list,
> 
> I've just downloaded linux-2.4.31 from kernel.org and compiled it for
> the mpc8272ads board.
> 
> When I boot the kernel it oopses in fcc_enet.c:init_fcc_startup() at
> the point where it tries to write to the BCSR.
> 
> Does anybody know why writing to the BCSR should cause a machine
> check?
> 
I guess I was not ioremapped/io_block_mapped properly.
Take a look into arch/ppc/kernel/m8260_setup.c m8260_map_io() function.
Anyway BCSR is better to be ioremapped in the place it is required.
> TIA,
> 
> Alex
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> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
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> 
> 


-- 
Sincerely,
Vitaly