铁路信号安全计算机平台共享内存数据交互机制研究  

Research on Mechanism of Shared Memory Data Interaction for Railway Signal Safety Computer Platform

作　　者：白帅 梁志国 乔亚琼[2] 刘庆猛 于健洁 BAI Shuai;LIANG Zhiguo;QIAO Yaqiong;LIU Qingmeng;YU Jianjie

机构地区：[1]中国铁道科学研究院集团有限公司通信信号研究所,北京100081 [2]兰州交通大学,兰州730000 [3]中国铁道科学研究院集团有限公司科学技术信息研究所,北京100081

出　　处：《铁道通信信号》2023年第9期34-38,46,共6页Railway Signalling & Communication

基　　金：中国铁道科学研究院集团有限公司科技研究开发计划(2020YJ052,2021YJ018)。

摘　　要：铁路信号安全计算机平台是实现铁路信号系统安全应用的核心设备。基于龙芯处理器的安全计算机平台实现了从硬件板卡到系统软件全过程的设计和研发。为了能够安全、稳定、可靠地在该平台内部进行实时、有效的信息传输和数据状态更新,设计了基于信号量的共享内存数据交互机制,可实现对目标数据物理地址空间的直接访问和数据更新,避免同一时间、多个对象对同一共享内存地址空间的读写访问。共享内存特定的访问隔离机制,能够保证安全计算机平台内部不同处理器之间数据交互的时效性和安全性。Railway signal safety computer platform is the core equipment for achieving safety applications in railway signal systems.The safety computer platform based on LOONGSON processor has realized the design and development of the whole process from hardware board to system software.In order to securely,stably and reliably perform real-time and effective information transmission and status update within the safety computer platform,a semaphorebased shared memory data interaction mechanism to directly access and update the physical address space of the target data is designed,and avoids multiple objects read and write access to the same shared memory address space at the same time.Its specific access isolation mechanism ensures the timeliness and security of data interaction between different processors in the platform.

关 键 词：铁路信号 安全计算机 龙芯处理器 共享内存 信号量 

分 类 号：U284.3[交通运输工程—交通信息工程及控制]