Re: [Qemu-devel] [RFC v5 86/86] 440fx: fix PAM, PCI holes

Avi Kivity
2011-07-25T13:28:18Z

On 07/25/2011 04:17 PM, Gleb Natapov wrote:
> On Mon, Jul 25, 2011 at 04:14:45PM +0300, Avi Kivity wrote:
> > On 07/25/2011 04:07 PM, Anthony Liguori wrote:
> > >On 07/20/2011 11:50 AM, Avi Kivity wrote:
> > >>The current implementation of PAM and the PCI holes is broken in several
> > >>ways:
> > >>
> > >> - PCI BARs are not restricted to the PCI hole (a BAR may hide memory)
> > >
> > >Technically, a BAR can be mapped to any non-RAM memory location.
> >
> > I understood TOM (Top Of Memory) to be fixed - can't find a register
> > for it - but maybe I misread the spec.
> >
> PIIX3 spec:
>
> 2.2.11. TOM—TOP OF MEMORY REGISTER (Function 0)
> Address Offset: 69h
> Default Value: 02h
> Attribute: Read/Write
>

What's it doing in PIIX3? Is it the same TOM?

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error compiling committee.c: too many arguments to function