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PCI Express System Architecture by MindShare, Inc, Ravi Budruk, Don Anderson, Tom Shanley

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The Hot-Plug Controller Programming Interface

The standard programming interface to the Hot-Plug Controller is provided via the PCI Express Capability register block. Figure 17-4 on page 670 illustrates these registers and highlights the registers that are implemented by the different types of devices. Hot Plug features are primarily provided via Slot Registers that are defined for root and switch ports. The Device Capability register is also used in some implementations as described later in this chapter.

Figure 17-4. PCI Express Configuration Registers Used for Hot-Plug

Slot Capabilities

Figure 17-5 on page 671 illustrates the slot capability ...

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