Bus monitoring method and apparatus based on AHB bus structure

Abstract

The invention discloses a bus monitoring apparatus and method based on AHB bus structure, which is used for single-processor system in AHB bus structure. The bus monitoring apparatus is disposed between the memory control parts and the AHB bus, used for filtering access and storage requests sent out by main apparatus of bus. When the bus monitoring device monitors the access and storage request affecting the consistency of the Cache, the processor is notified to perform a Cache consistence processing, prevent the access and storage requests causing monitoring hit from getting access to the memory control part, until the Cache consistence processing is ended.

Description

technical field [0001] The present invention relates to a bus monitoring technology for ensuring cache (Cache) consistency in a system chip (System-on-Chip, hereinafter referred to as SoC), in particular to a single-processor SoC chip based on an AHB (Advanced High-performance Bus) bus structure A bus monitoring method and device. Background technique [0002] The advancement of semiconductor technology and the development of integrated circuit design technology have made it possible to integrate the functional components of the entire system on a single chip. At present, SoC has become the mainstream technology of today's integrated circuits. In SoC structure design, the method of ensuring cache coherence has a certain influence on the performance of the whole system. [0003] In the processor, the Cache stores a copy of the data in the main memory. If the master device on the bus accesses the main memory, the data in the Cache may be inconsistent with the main memory, re...

AI Technical Summary

Problems solved by technology

However, the existing SoC based on the AHB bus structure mainly adopts strategies such as software flushing and setting the address space not to be cached by the Cache, especially for the single-processor bus structure, there is no mature implementation method and example of bus monitoring technology

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