Virtual I/O Based on ScratchPad Memory for Embedded System

Binbin Wu, Xiangsheng Tang, Hui Yuan,Qingsong Shi,Jiexiang Kang,Tianzhou Chen

Computer and Information Technology（2010）

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摘要

Scratchpad memory (SPM) is software-controlled on-chip SRAM memory and widely used in embedded processors to meet the strict requirements on performance, energy consumption and real-time response of embedded systems. This paper proposes an SPM based I/O approach, called Virtual I/O based on SPM (SPMIO), to accelerate the I/O access time efficiently through SPM. Different I/O requests are buffered and scheduled on SPM through SPMIO with the help of ScratchPad Memory Operating System (SPMOS). SPMIO will provide the direct datapath to CPU for I/O accesses, reduce delays and lower the power consumption. The experimental results show that SPMIO is efficient and practical.

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关键词

scratchpad memory,energy consumption,o access time,power consumption,on-chip sram memory,embedded processor,o request,embedded system,o approach,o access,embedded systems,system on a chip,operating system,chip,memory management,real time

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