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Re: [Qemu-ppc] [Qemu-devel] [PATCH] PPC: fix PCI configuration space Mem

From: Benjamin Herrenschmidt
Subject: Re: [Qemu-ppc] [Qemu-devel] [PATCH] PPC: fix PCI configuration space MemoryRegions for grackle/uninorth
Date: Thu, 19 Dec 2013 08:04:16 +1100

On Wed, 2013-12-18 at 13:34 +0100, Alexander Graf wrote:
> Hrm. Are you 100% sure this correct? This UniNorth is a real headache.
> The closest thing to a spec for it is the U4 spec which is generations
> ahead:
>   http://www.datasheetarchive.com/dl/Datasheets-SW3/DSASW0048084.pdf
> On that at page 109 you can see that you do indeed have a range of
> registers and a few fancy modes that can even be used to directly
> access config space registers without the usual index/data cycle.
> Ben, do you have any more insight into how the original Uninorth
> worked?

Just index/data. Look at Linux :-)


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