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Date: Tue, 10 Apr 2012 13:45:54 -0700
Message-ID: <CAE9FiQWnvB2VbBQQaEnDE0nf+Zwy6nyoGrEuVrUesQEzgYfbvA@mail.gmail.com>
Subject: Re: PCI resources above 4GB
From: Yinghai Lu <yinghai@kernel.org>
To: Steven Newbury <steve@snewbury.org.uk>
Cc: Bjorn Helgaas <bhelgaas@google.com>, linux-pci@vger.kernel.org
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On Tue, Apr 10, 2012 at 1:26 PM, Steven Newbury <steve@snewbury.org.uk> wro=
te:
>>
> So far I'm concluding the BIOS isn't sane. =A0Is it possible to define a =
custom memory map from the linux boot cmdline to set TOP_OF_LOW_MEM?

The BIOS have MMIO and memory overlapping...

>
> Obviously, I'd prefer getting everything allocated into the address space=
 available, and working, but if it comes down to it I'd accept a hack like =
the above if there's no other way.

Could try to reduce carbus preallocated size.... boot with pci=3Dcbmemsize=
=3D16M

Please apply attached patch in addtition to allocate_high_at_first

Thanks

Yinghai

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