[LinuxBIOS] The device number of PCIe

Ed Swierk eswierk at arastra.com
Mon Jan 7 18:16:49 CET 2008

On 1/6/08, Feng, Libo <Libo.Feng at amd.com> wrote:
> In PCI, the IDSEL pin defines the device number. But in PCIe, there is no
> such pin, how is the device number defined?

"Each PCI Express Link is equivalent to a logical PCI bus. In other
words, each Link is assigned a bus number by the bus enumerating
software. A PCI Express endpoint is device 0 on a PCI Express Link of
a given bus number. Only one device (device 0) exists per PCI Express

-- PCI Express System Architecture, p. 51


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