[coreboot] Trac reminder: list of new ticket(s)

Eric W. Biederman ebiederm at xmission.com
Wed Jul 16 08:02:46 CEST 2008

Stefan Reinauer <stepan at coresystems.de> writes:

> Segher Boessenkool wrote:
>>> In practice the subsystem vendor IDs are quite arbitrary and definitely not
>>> the same for all PCI devices per mainboard
>> They aren't even allowed to be the same for all devices on a mainboard:
>> the subsystem IDs should uniquely identify the device, without having
>> to look at the "regular" IDs as well.
> Again, mind me asking. Where did you find this definition?

Section 6.2.4 of the PCI specification states:

> These registers are used to uniquely identify the add-in card or subsystem
> where the PCI device resides.  The provide a mechanism for add-in card vendors to
> distinguish their add-in cards from one another even though the add-in cards may
> have the same PCI controller on them (and therefore the same Vendor ID and Device ID).

Or in paraphrase they identify the PCB the IC sits on.


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