| 针对嵌入式系统的低功耗存储器管理单元设计 |
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| 引用本文： | 朱贺飞,陆超,周晓方,闵昊,周电.针对嵌入式系统的低功耗存储器管理单元设计[J].计算机工程,2007,33(5):226-228. |
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| 作者姓名： | 朱贺飞 陆超 周晓方 闵昊 周电 |
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| 作者单位： | 复旦大学专用集成电路与系统国家重点实验室,上海,201203 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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上海市科委SDC计划基金 |
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| 摘 要： | 针对Linux操作系统，实现了面向32位RSIC嵌入式处理器的低功耗存储器管理单元。通过在指令快表中增加预比较电路，提高了处理器连续访问同一虚拟页面时的地址转换效率，降低指令快表命中时的功耗37.07%。两级比较结构的内容寻址存储器与传统结构相比，在失效和命中时分别可以取得44.98%和74.94%的功耗节省。该文设计的存储器管理单元能够很好地和Linux配合，完成地址映射及存储权限管理。
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| 关 键 词： | 嵌入式系统 低功耗 存储器管理单元 快表 |
| 文章编号： | 1000-3428（2007）05-0226-03 |
| 修稿时间： | 2006-07-23 |
Design of Low Power Memory Management Unit for Embedded System |
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| ZHU Hefei,LU Chao,ZHOU Xiaofang,MIN Hao,ZHOU Dian.Design of Low Power Memory Management Unit for Embedded System[J].Computer Engineering,2007,33(5):226-228. |
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| Authors: | ZHU Hefei LU Chao ZHOU Xiaofang MIN Hao ZHOU Dian |
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| Affiliation: | (ASIC & Systems State Key Laboratory, Fudan University, Shanghai 201203) |
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| Abstract: | To support Linux operating system,a low power memory management unit for a 32-bit embedded processor is proposed.Since the added pre-comparing circuits can greatly improve the efficiency of address translation when the processor needs to access the same virtual address page,the power consumption of ITLB can be reduced by 37.07%.Two-level hierarchical content addressable memory(CAM) also has a power reduction of 44.98%(miss) and 74.94%(hit) compared with the conventional fully parallel comparing architecture.Experiments show that RSIC embedded processor with MMU can run Linux perfectly. |
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| Keywords: | Embedded system Low power Memory management unit TLB |
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