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From: Kumar Gala <galak@kernel.crashing.org>
Subject: Re: [PATCH/2.6.17-rc4 1/10] Powerpc: Add general support for mpc7
	448h pc2 (Taiga) platform
Date: Fri, 2 Jun 2006 09:50:00 -0500
To: Zang Roy-r61911 <tie-fei.zang@freescale.com>
Cc: Alexandre.Bounine@tundra.com, Liu Dave-r63238 <DaveLiu@freescale.com>,
	linuxppc-dev list <linuxppc-dev@ozlabs.org>,
	Paul Mackerras <paulus@samba.org>,
	Yang Xin-Xin-r48390 <Xin-Xin.Yang@freescale.com>
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On Jun 2, 2006, at 3:20 AM, Zang Roy-r61911 wrote:

>
>> How much RAM do you have ? Maybe you are running out of
>> virtual space ?
>>
>> Ben.
>>
>>
>
> 512MBytes

If I understand things, there is a 16M region for PCI config space.   
You could look at just doing the ioremap for each chunk when its  
needed via the low level calls.

- kumar