In the realm of semiconductor technology control,achieving complete autonomous chip control has emerged as a focal point in today's semiconductor technology advancement.Given its features of open source and widespread adoption,the study of RISC-V architecture holds significant importance for enabling microprocessor autonomous controllability.Within microprocessor systems,limitations on physical resources and potential risks associated with direct storage access necessitate restrictions on DMA access to I/O devices,thereby impacting access performance.The prevailing approach involves virtualizing I/O transactions to effectively address this issue.This article firstly proposes a I/O virtualization architecture based on RISC-V,which greatly accelerates the I/O access process,this architectrue consums a few clock period to complete DMA requests from I/O devices to memory.This design will be integrated into RISC-V architecture CPU as an IP,accelerating the access of I/O devices to memory.
国家科技期刊平台
NSTL
万方数据
