North bridge device, bus interconnection network and data transmission method

Abstract

The invention provides a north bridge device, a bus interconnection network and a data transmission method applied to the north bridge device and the bus interconnection network, which can improve the bandwidth of data exchange between the north bridge and the bus, and reduce the routing pressure on the bus interconnection network. The north bridge device is connected to the IO device, and at least two bus interfaces are set, and each bus interface is connected to a bus interface of the bus interconnection network, including: a routing unit, used to receive the access request sent by the IO device, if according to the access request Judging that the address to be accessed by the IO device belongs to the address range corresponding to the first bus interface of the north bridge device, then routing the access request to the bus interface connected to the first bus interface through the first bus interface; the feedback unit is used for receiving a reply message sent from the bus interface connected to the first bus interface and returned through the first bus interface, and feeding back the reply message to the IO device.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a north bridge device, a bus interconnection network and a data transmission method applied to the north bridge device and the bus interconnection network. Background technique [0002] A simple schematic diagram of a computer hardware structure such as figure 1 As shown, the central position in the figure is the bus interconnection network, each device is connected to the bus interconnection network through the bus protocol interface, and the bus interconnection network routes the information source to the destination according to the pre-configured routing information. The north bridge device is responsible for connecting some high-speed IO devices, such as network cards, GPUs, etc.; the IO interface on the bus provides the chip with a device interface that can be directly connected to the bus to improve the efficiency of data exchange between on-chip devices and devices on t...

AI Technical Summary

Problems solved by technology

[0004] 1) The north bridge is connected to the bus interconnection network through an interface, and the frequency and data bit width on this interface become the bottleneck of the bandwidth for data exchange between the north bridge and other devices on the bus, which cannot meet the increasing IO bandwidth requirements;

[0005] 2) The address routing is all completed by the bus interconnection network, so that the connection between the north bridge interface and all other devices on the bus needs to be designed on the bus interconnection network. When the number of devices on the bus gradually increases, the design difficulty of the bus interconnection network will increase

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