Plug-And-Play Configuration of Routing Options
PCI-compatible configuration space and PCI Express extended configuration space are covered in detail in the Part 6. For reference, the programming of three sets of configuration space registers related to routing is summarized here.
Routing Configuration Is PCI-Compatible
PCI Express supports the basic 256 byte PCI configuration space common to all compatible devices, including the Type 0 and Type 1 PCI configuration space header formats used by non-bridge and switch/bridge devices, respectively. Devices may implement basic PCI-equivalent functionality with no change to drivers or Operating System software.
Two Configuration Space Header Formats: Type 0, Type 1
PCI Express endpoint devices support ...
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