PCIe Devices - PLX Technology
PCIe Devices - PLX Technology
PCIe Devices - PLX Technology
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Host PCI Bridge Discovery<br />
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Access to a PCI bus is by a host/PCI bus bridge<br />
and is always referred to as PCI bus 0<br />
– There can be several host/PCI bus bridges<br />
– Each host/PCI bus bridge will be uniquely numbered<br />
• How each bridge is numbered/identified will be system specific<br />
and dependent on the host processor(s) and local OS<br />
A PCI/PCI bridge or P-P bridge may provide<br />
access to other PCI busses<br />
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PCI devices reside on either a primary or a secondary PCI<br />
bus<br />
– A primary bus is the bus closer to the host/PCI bridge or<br />
upstream PCI bus<br />
– A secondary bus is the bus further away from the host<br />
processor or downstream PCI bus<br />
Configuration Reads/Writes used to discover<br />
busses and devices from host/PCI bus bridge<br />
Copyright by Dashcourses, Inc. 2009<br />
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