Chapter 9. System Management
The Previous Chapter
HT uses an interrupt signaling scheme very similar to PCI's Message Signaled Interrupts. The previous chapter defines how HT delivers interrupts to the Host Bridge via posted memory writes. The chapter also defined an End of Interrupt Message and details the mechanism that HT uses for configuring and setting up interrupt transactions (which is different from the PCI-defined mechanisms).
This Chapter
Rather than requiring HT devices to incorporate additional pins for signaling system-related items such as power management events, System Management messages are defined that permit signaling via transactions, thereby creating virtual wires. This chapter defines the mechanism used to send these messages, ...
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