基于高地址约束和按需存储分配的UCard底层调度模块研究  

Research on the UCard Scheduling Module Based on Space-Sensitive Storage Allocation and High Address Constraints

作　　者：曹计昌[1] 周宇杰[1] 

机构地区：[1]华中科技大学计算机科学与技术学院,湖北武汉430074

出　　处：《计算机工程与科学》2007年第6期121-123,147,共4页Computer Engineering & Science

摘　　要：本文介绍了一种实现一卡多发的新型智能卡UCard及其体系结构。针对UCard现有固定存储空间分配存在资源浪费等不足,提出了一种按需存储空间分配方法,并且该方法通过对高位地址总线的约束实现了不同大小COS之间的物理隔离。然后在引入动态地址控制器的基础上,给出了基于按需存储空间分配的UCard底层调度模块的一种实现方式。最后利用有限状态机对UCard底层调度模块装载、调度、卸载COS的过程进行了形式化描述。UCard is a new concept of SmartcaM that can realize the functions of muhi-COS. This paper firstly introduces its architecture and basic characteristics. Then the method of space-sensitive storage allocation is proposed to solve the problem of resource waste in fixed storage allocation , and this method can also carry out the physical separation between COSes by restricting high addresses. After the introduction of a dynamic address controller, a way of implementing the UCard scheduling module based on space-sensitive storage allocation is presented. Finally, the finite state module is used for formally describing COS loading,COS scheduline and COS uninstalling.

关 键 词：UCARD 底层调度模块 存储分配 有限状态机 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]