A multi-core DMA segmented data transfer method using slave counting for gpdsp

A segmented data and transmission method technology, applied in electrical digital data processing, instruments, etc., can solve problems such as small bit width, insufficient calculation accuracy and addressing space, and limit data transmission efficiency, so as to reduce load and lighten the on-chip network Load, the effect of increasing the data transfer rate

Active Publication Date: 2017-12-12
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] General scientific computing requires high-performance DSP, but traditional DSP has the following disadvantages when used in scientific computing: 1) The bit width is small, which makes the calculation accuracy and addressing space insufficient
The data exchange of multi-core chips needs to be transmitted through the on-chip network. Excessively high on-chip network load will limit the data transmission efficiency. Efficient multi-core DMA design must reduce the load on the on-chip network

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  • A multi-core DMA segmented data transfer method using slave counting for gpdsp
  • A multi-core DMA segmented data transfer method using slave counting for gpdsp
  • A multi-core DMA segmented data transfer method using slave counting for gpdsp

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Such as figure 1 Shown is a schematic diagram of the GPDSP architecture of the method of the present invention in a specific application example. The multi-core GPDSP processor is composed of DSP nodes, on-chip network and DDR3 SDRAM, an external storage component. Each DSP node includes a DSP core, and the network-on-chip implements data communication between each DSP node and between the DSP node and an external storage unit. Such as figure 2 Shown is a schematic diagram of the location of the DMA in the GPDSP calculation kernel in this embodiment. DMA is connected with components such as peripheral hardware configuration bus (PBUS), vector memory (Vector Memory, VM) and scalar memory (Scalar Memory, SM) in the DSP core. Among them, the scalar processing unit SPU configures transmission parameters for the DMA unit throug...

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Abstract

A kind of multi-core DMA segmentation data transmission method that adopts slave machine counting for GPDSP, its transmission process is: (1) main frame DMA starts, generates segmentation data transmission request according to configuration parameters; DMA sends segmentation data transmission request every time The read request has carried the read data and returned the data selection vector, and the read data returned the data selection vector indicating the target DSP kernel of the returned data; (2) the data returned by the external storage unit has carried the read data corresponding to the read request and returned the data selection vector , the on-chip network interprets the signal field, and sends data to the corresponding DSP core according to its effective bits; (3) After the DMA of the DSP core receives the returned data, it forwards the data to the core storage unit AM or SM, and counts at the same time ; (4) When the counting is completed, set the transaction completion flag register. The invention has the advantages of simple principle, convenient operation, flexible configuration, improved memory access efficiency and the like.

Description

technical field [0001] The present invention mainly relates to the field of General Purpose Digital Signal Processor (GPDSP), in particular to a DMA segmented data transmission method using slave counting. Background technique [0002] Digital signal processor (Digital Signal Processor, DSP) as a typical embedded microprocessor is widely used in embedded systems. , has brought great opportunities to the development of signal processing, and its application fields have expanded to all aspects of military and economic development. In the application fields of modern communication, image processing and radar signal processing, as the amount of data processing increases, the requirements for calculation accuracy and real-time performance increase, and it is usually necessary to use a higher-performance microprocessor for processing. [0003] Different from the central processing unit CPU, DSP has the following characteristics: 1) Strong computing power, focusing on real-time co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/28
Inventor 陈书明郭阳马胜万江华杨柳刘宗林陈胜刚孙书为雷元武刘胜陈虎田玉恒胡月安王占立丁一博
Owner NAT UNIV OF DEFENSE TECH
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