February 2003
Intermediate to advanced
592 pages
11h 47m
English
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Basic Jobs Of A HyperTransport Bridge
As in the case of PCI bridges, a HyperTransport bridge has a number of responsibilities:
It extends the topology through the addition of one or more secondary buses. Each HyperTransport chain (bus) can support up to 32 UnitIDs. Because a device is permitted to consume multiple UnitID's, implementing a bridge is a reasonable way to add a new chain that can support 32 additional UnitIDs (the bridge secondary interface consumes at least one of the new UnitIDs).
It acts as host for each of its secondary chains. There are many aspects to this, including ordering responsibilities, error handling, maintaining a queue for outstanding transactions routed to other buses, reflecting peer-to-peer transactions originating ...
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