Patent ID: 7782783

Claim:
A method for centralized link power management control (CLMC), performed by a control unit of a north-bridge, comprising: monitoring a data transmission status of a data transport bus coupled between a processor and the north-bridge comprising: storing a value indicating initiation of CLMC in a first system management interrupt (SMI) command information register; storing an information indicating a data transmission status of the data transport bus in a data transmission status register; storing an address of a second SMI command information register in a SMI command address register; and issuing a command to a system management controller (SMC) for loading the value stored in the first SMI command information register to the second SMI command information register when the data transmission status of the data transmission status is detected being busy or being idle; when it is detected that the data transmission status of the data transport bus is busy, initiating centralized link management control to configure a device corresponding to the data transport bus for speeding up data transmission of the data transport bus; when it is detected that the data transmission status of the data transport bus is idle, initiating centralized link management control to configure the device corresponding to the data transport bus for slowing down data transmission of the data transport bus.