Dynamically reconfigurable DMA arrays

Abstract

The invention provides a dynamically reconfigurable DMA array, which comprises a control CPU (Central Processing Unit), a plurality of DMAs, an information sharing pool and a reconfiguration control logic, and is characterized in that the control CPU is configured to configure and start the DMA array and construct reconfiguration control information of the DMA array; wherein the information sharing pool is configured to store state information of each DMA in the DMA array and maintain information accessible and shareable by the plurality of DMAs; the reconstruction control logic is configuredto modify control information of the DMA array to adjust an operation process of the plurality of DMAs in real time. According to the dynamically reconfigurable DMA array, random control and reconstruction of the DMA array can be realized, so that the work of DMA does not depend on the control of a CPU.

Description

technical field [0001] The invention belongs to the field of disk arrays, in particular to a dynamically reconfigurable DMA array. Background technique [0002] In the process of developing and designing various chips, the processing of data flow is often a very difficult problem. In order to reduce the excessive time occupied by the CPU in scheduling and moving data streams, DMA came into being to help the CPU schedule and move data streams, thereby releasing CPU time and allowing the CPU to focus on other transaction processing. But the scheduling and control of DMA is still an unavoidable problem. [0003] Generally, there are two main working modes of DMA: one is the normal DMA mode, that is, the DMA starts working after being triggered by software or hardware under the control of pre-configuration, and ends after the operation in a given configuration mode is completed; the other is One is the linked list DMA mode (usually also called Scatter-Gather DMA or Descriptor ...

AI Technical Summary

Problems solved by technology

Although DMA is used for data flow scheduling and moving, because DMA does not have the ability to exchange information and work together, CPU or MCU actually still dominates the entire flow control process. In some complex scenarios, it even has to be considered as a dedicated DMA Effective scheduling with CPU or MCU

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