基于UVM的APB接口与DMA联动的验证方法研究

Research on Verification Method of APB Interface and DMA Linkage based on UVM

在芯片设计的流程中至关重要的一环就是对于芯片的验证。APB接口作为一种AMBA总线接口协议,被大面积应用于各类So C芯片中。当使用APB接口进行数据搬移时,需要DMA模块与CPU进行信号交互,由此带来APB接口与DMA模块联合验证的需求,而不同的IP核对于功能覆盖点有不一致的要求。针对不同的IP核,提出一种针对APB接口与DMA联动的验证结构,可通用于各种IP核的APB接口与DMA联动验证,增强了验证模块的可重用性。通过UVM体系的验证,通用功能覆盖率达到100%,符合业内的实际生产需求覆盖率。

A critical part of the chip design process is verification of the chip.As an AMBA bus interface protocol,the APB interface is widely used in various SoC chips.When using the APB interface for data movement,the DMA module needs to perform signal interaction with the CPU,which brings the requirement for joint verification of the APB interface and the DMA module,and different IP cores have inconsistent requirements for function coverage points.This paper proposes a verification structure for the linkage between the APB interface and the DMA for different IP cores.It can be used for the linkage verification of APB interface and DMA of various IP cores,which enhances the reusability of the verification module.Through the verification of the UVM system,the universal functional coverage reached an interpretable 100%,which in line with the actual production demand coverage within the industry.