基于有限状态机的双端口存储器访问竞争处理方法  

The solution of Double-port Ram Competition Based on FSM

作　　者：安书董 索晓杰 李亚锋 王昭 An Shudong;SuoXiaojie;LiYafeng;Wang Zhao(Xi'an Aeronautics Computing Technique Research Institute,AVIC,Xi'an 710068,China)

机构地区：[1]中国航空工业集团公司西安航空计算技术研究所,陕西西安710068

出　　处：《信息通信》2020年第8期130-132,共3页Information & Communications

基　　金：航空科学基金项目资助(20101931004)。

摘　　要：在多处理器架构中,关于双端口存储器访问竞争的解决成为提高系统可靠性的关键技术,本文设计了一种基于有限状态机的双端口存储器访问竞争处理方法。通过有效有限状态机的方式,控制双端口RAM访问权限,按交替轮询的方式分别对双口RAM进行访问,可以避免两端口对同一地址单元操作,并控制竞争访问的发生。该方法对系统时序的匹配要求较低,易于设计,不依赖于存储器的仲裁逻辑,可靠性高,具有较强的移植性,为解决多处理器架构中双口竞争问题提供一种有效的方案。In multiprocessor system, the double port ram is widely used due to its characteristics. When the same address of double port ram is accessed, the competition of double port ram will be occurred. The phenomena will reduce the reliability of system.In order to avoid the occurring of double-port ram competition, asolution method of double-port ram competition based onfinite state machine is introduced. In this scheme, the finite state machine is achieved by FPGA, this method is different from traditional route, independence of the double-port ram, so the high reliability and portability can be achieved. The result shows that the method can provide an effective way to avoid the double port ram competition.

关 键 词：多处理器架构 有效状态机 双端口RAM 可靠性 

分 类 号：V241.48[航空宇航科学与技术—飞行器设计]