Re: PCI Express

Grant Grundler
2005-03-09T18:48:29Z

On Wed, Mar 09, 2005 at 12:12:37PM -0600, Colin Ngam wrote:
> The MSI address portion allows 64bits for the address.

Yes - *allows*. It also allows devices to implement 32-bit MSI address.
MSI "Control" bits indicate what is implemented.
See PCI2.2 spec or later and search for MSI.

> I am very much interested in your assertion that the MSI address is
> defined by PCI Spec to be 0xfeex_xxxx.
...
> Can you kindly point me to the relevent section?

It's not and it doesn't belong there.

IA64 specs defines Processor Interrupt Block and where it lives.
See "Intel® Itanium® Software Developer's Manual"
Volume 2, Part 1, Section 5.8.4
Volume 2, Part 1, Section 11.9.3

grant