Multi-core fine grit synchronous DMA transmission method used for GPDSP

Abstract

The invention discloses a multi-core fine grit synchronous DMA transmission method used for a GPDSP. The method includes the steps that each DMA component participating in multi-core fine grit synchronous transmission will transmit a local frame transmission ending signal to a global synchronous register after transmitting one frame of data; the ending signals from multiple cores are integrated to be a global frame transmission ending signal; each DMA component checks whether core list parameters configured for the DMA component and participating in synchronous transmission are uniform with the corresponding received the global frame transmission ending signal; if yes, it shows that all the DMA components participating in synchronous transmission complete transmission of the previous frame of data, and can start to transmit a next frame of data; if not, it shows that the DMA components participating in synchronous transmission still do not complete transmission of the previous frame of data, and then the DMA components participating in synchronous transmission continue to wait unit matching is successful. The line hit rate of an SDRAM can be effectively increased, the utilization arte of memory access bandwidth is obviously increased, and the transmission efficiency of DMA is obviously improved.

Description

technical field [0001] The present invention mainly relates to the general purpose digital signal processor (General Purpose Digital Signal Processor, GPDSP) field, in particular a kind of multi-core fine-grained synchronous transmission method suitable for direct memory access component DMA (Direct Memory Access, DMA) in GPDSP, with Improve DDR write access efficiency. Background technique [0002] General purpose digital signal processor GPDSP (General Purpose Digital Signal Processor, GPDSP) is a new architecture that can not only maintain the basic characteristics of embedded DSP and the advantages of high performance and low power consumption, but also efficiently support general scientific computing. It can simultaneously Provide efficient support for 64-bit high-performance computers and embedded high-precision signal processing. The application fields of GPDSP include scientific computing, communication voice, graphics and images, and wearable devices, etc. These fi...

AI Technical Summary

Problems solved by technology

However, the traditional DMA structure does not provide the function of multi-core synchronous data transfer. At this time, due to the different execution states of each processing core, when their respective DMAs transfer data to DDR SDRAM, the data may arrive out of order, reducing the The row hit rate of DDR SDRAM limits the data transfer efficiency of DMA

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