【作者】 杨功立；

【导师】 付永庆；

【作者基本信息】 哈尔滨工程大学 ， 通信与信息系统， 2003， 硕士

【摘要】 本文重点叙述了基于“龙芯”CPU的高性能安全服务器主板(GSMB)的设计与研究。通过对“龙芯1号”(Godson)CPU微体系结构定型的讨论和关于“龙芯1号”CPU所需达到的的性能指标的介绍，规划了基于“龙芯1号”CPU的高速服务器主板GSMB的系统功能，并叙述了根据系统功能所设计的GSMB板级系统结构、BIOS级解决方案和重要芯片的选型；另外还研究了高速电路设计所涉及的如可测试性、信号完整性、电磁兼容性等一系列问题，并依据研究构建了基于IBIS的软件仿真模型，同时借助EDA仿真分析工具对关键线网与关键模块进行了板级仿真。基于仿真结果的指导，对GSMB进行了板级设计。 主板设计是一项工程性极强的系统工程。在设计过程中，应综合考虑系统性能要求与众多相关因素，从而取得最佳的设计方法。目前，GSMB的工作外频可达117MHz，可支持Linux和VxWorks等实时操作系统，并已通过高低温工作(-35℃-70℃)的环境试验考核。GSMB的开发成功，不仅为服务器主板设计积累了理论和实践基础，而且填补了我国长期没有基于国产通用CPU的安全服务器的空白，更可以为研制北桥IPcore、南桥IPcore、SoC IPcore提供一个可进行交叉功能验证的硬件平台，以利于开发具有自主知识产权的芯片组、各种通用CPU和高速嵌入式CPU、增强市场竞争力、早日完成国产CPU的产业化发展。更多还原

【Abstract】 This paper stressed on the design and research of GSMB(GodSon MainBoard ) which based on "Godson" CPU. System functions of GSMB based on "Godson" CPU was programmed by the discussion of "Godson"CPU micro-system structure finalization and by the introduction of "Godson"CPU performance requirements. This essay also specified on GSMB board level system structure, BIOS level solving and selection of important chips. Moreover, problems related to high speed circuit design such as mensurability, PCB layout signal integrity, electromagnetic coexist were researched. IBIS software simulation model was based on the research. At the same time key signal net and key model were simulated at board level with the help of EDA simulation analysis tool. GSMB was designed at board level based on the result of simulation.Main board design is a system project of much engineering. System performance requirement and lots of related factors should be considered in order to gain the best design method. Now the outer working frequency of GSMB can reach 117MHz, which can support Linux operating system and VxWorks and the like real-time operating system, and it can stand the test of high-low temperature (-35℃-70℃) working condition. The successful design of GSMB main board can not only establish theory and practice basis of designing server but also fill up the blank of no safety server based on domestic general CPU in our country in a long time. Moreover, GSMB platform can provide North Bridge, South Bridge, SOC IP core with a cross function hardware test circumstance, which can avail to develop chip groups of independent knowledge right, design all kinds of general CPU and high speed embedded CPU, strengthen market competitive ability, finish industrial develop of domestic CPU at an early date.更多还原