| 摘要 |
A data processing system includes a processor, system memory and a number of peripheral devices, and one or more bridges which may connect between the processor, memory and peripheral devices and other hosts or peripheral devices such as in a network. A bridge, such as a PCI host bridge, connects between a primary bus (e.g system bus) and a secondary bus. The host bridge provides a dual host bridge function which creates two secondary bus interfaces. This allows increased loading capability under one dual host bridge compared to a lesser number of slots allowed under one normal host bridge. Also included is additional control logic for providing arbitration control and for steering transactions to the appropriate bus interface. Additionally, peer to peer support across the two secondary bus interfaces in provided.
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