基于Gem5 的CM3 仿真器的研究与实现
Study and Implementation of Gem5-Based CM3 Simulator
余涛 1刘芹 1赵紫微1
作者信息
- 1. 武汉大学国家网络安全学院,湖北 武汉 430079
- 折叠
摘要
在嵌入式领域,业界主要使用ARM公司Keil系列仿真工具进行ARM嵌入式系统开发,芯片仿真是其重要功能之一.然而ARM Keil是国外商业软件,购买License价格不菲,且仿真器也是影响芯片验证和软件开发的关键技术之一.针对上述情况,以Cortex-M3 芯片为例设计了一种基于开源模拟器Gem5 的系统调用仿真方法.首先,分析Gem5 模拟器的源码结构、运行过程以及指令集仿真流程,描述Gem5 仿真原理.然后,通过为Gem5 添加Cortex-M3 寄存器和指令集支持实现Cortex-M3 在AtomicSimpleCPU的SE(System Emulation)模式下的仿真.最后,设计了灵活可扩展的指令集自动化测试工具,以验证指令功能是否正确仿真.实验结果表明,经过充分测试实现的仿真器能够正确仿真,且仿真效率较高,提供了一种开源、技术可控的Cortex-M3 的软仿真方案.
Abstract
In the embedded systems area,the industry mainly uses the ARM Keil series simulation tools for ARM embedded system development,where software simulation of chip is an important function.However,ARM Keil is a foreign commercial software,and purchasing a license is expensiv.To address this situation,a system call simulation method based on the open source simulator Gem5 is proposed with Cortex-M3 chip as an example.Firstly,the Gem5 simulator's source code structure,operation process and instruction set simulation flow were analyzed to describe the Gem5 simulation principle.Secondly,the simulation of Cortex-M3 in System Emulation(SE)mode of AtomicSim-pleCPU was implemented by adding Cortex-M3 registers and instruction set support to Gem5.Finally,a flexible and scalable instruction set test tool was designed to verify that the instruction functions are simulated correctly.The ex-perimental results show that the simulator implemented can work correctly and efficiently in testing,which provides an open source and technically controllable soft simulation solution for Cortex-M3.
关键词
嵌入式系统/仿真/开源模拟器/指令集/自动化测试Key words
Embedded systems/Simulation/Open source simulator/Instruction set/Automation testing引用本文复制引用
出版年
2024
NETL
NSTL
万方数据