Re: [Qemu-devel] [PATCH 0/5] boot order specification

[Scott Wood]

On Wed, 27 Oct 2010 10:57:12 +0200
Gleb Natapov <address@hidden> wrote:

> On Tue, Oct 26, 2010 at 04:14:24PM -0500, Scott Wood wrote:
> > On Tue, 26 Oct 2010 22:34:51 +0200
> > Gleb Natapov <address@hidden> wrote:
> > 
> > > Nothing resembles f0000000. There is also 2.2.1.1 Numerical Representation
> > > but no luck there too. This number is illegal according to it.
> > 
> > The encoding above applies to unit addresses inside the PCI bus node.
> > 
> > The unit address of the PCI controller node itself is encoded according
> > to its parent bus.
> > 
> Ah so to talk to pci controller OS writes to 0xf0000000?

Possibly, though I'm not familiar with Apple's PCI bindings.  It may be
e.g. the beginning of I/O or memory space instead (especially given
the large alignment and offset between successive buses).

On Freescale's PCI nodes it's the address of the PCI controller's
internal registers.

-Scott