| 摘要 |
One embodiment of the present invention provides a computer system that selectively switches a plurality of peripheral devices between a plurality of buses in order to improve computer system performance. This computer system includes a number of peripheral devices, including a first peripheral device and a second peripheral device, as well as a number of buses, including a first bus and a second bus. The computer system also includes a configuration register that receives bus configuration information from a processor executing a program. This bus configuration information specifies whether the first peripheral device is coupled to the first bus or the second bus, and whether the second peripheral device is coupled to the first bus or the second bus. The computer system also includes a switching mechanism that operates under control of the configuration register. This switching mechanism couples the first peripheral device to either the first bus or the second bus, and couples the second peripheral device to either the first bus or the second bus. In one embodiment of the present invention, the first bus is a shared bus coupled to more than one peripheral device and the second bus is a high-speed bus coupled to at most one peripheral device.
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