高技术通讯(英文版)
高技術通訊(英文版)
고기술통신(영문판)
HIGH TECHNOLOGY LETTERS
2003年
4期
27-32
,共6页
宋传华%Cheng Xu%Zhu Dexin
宋傳華%Cheng Xu%Zhu Dexin
송전화%Cheng Xu%Zhu Dexin
Unity-1%MMU%TLB%table walking%microprocessor
Virtual memory management is always a very essential issue of the modern microprocessor design. A memory management unit (MMU) is designed to implement a virtual machine for user programs, and provides a management mechanism between the operating system and user programs. This paper analyzes the tradeoffs considered in the MMU design of Unity-11 CPU of Peking University, and introduces in detail the solution of pure hardware table walking with two-level page table organization. The implementation takes care of required operations and high performances needed by modern operating systems and low costs needed by embedded systems. This solution has been silicon proven, and successfully porting the Linux 2.4.17 kernel, the Xwindow system, GNOME and most application software onto the Unity platform.
