Uniform internal and external memory architecture based on MMU (memory management unit)

Abstract

The invention discloses uniform internal and external memory architecture based on an MMU (memory management unit). The uniform internal and external memory architecture comprises a processor which is communicated with the MMU. The MMU is communicated with external equipment. The MMU comprises a management module and a memory control module. The external equipment comprises a DDR3SDRAM and a PCM. The management module comprises an internal memory mapping module, an internal memory protecting module and a dynamic data management module. The internal memory mapping module comprises an address mapping module and a mapping table which are communicated. The internal memory protecting module and the dynamic data management module receive data transmitted by the address mapping module. The uniform internal and external memory architecture has the advantages that various types of memories are used as mixed memories under the uniform internal and external memory architecture and used for storing data and executing programs, and a storage function good in performance and low in energy consumption is provided for a system by using the characteristics of different memories.

Description

technical field [0001] The invention relates to a unified internal and external memory architecture based on a memory management unit MMU. Background technique [0002] In the traditional computer storage architecture, the computer storage system includes two parts: memory and external memory. The memory mainly stores programs and data at runtime, while external memory is used to store programs and data persistently. For the traditional computer architecture, see Appendix figure 1 . When loading and executing a program, the time spent is: [0003] T load = T mem + T I O ① [0004] Among them, Tmem is the time it takes to access the memory to obtain the information stored in the external storage of the program to be loaded, is the time spent in I / O operations accessing external memory, and af...

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Problems solved by technology

[0009] The traditional MMU mainly implements address mapping by software, and the mapping operation is completed by software, which will increase a certain degree of system overhead. However, the present invention designs an MMU mechanism based on software and hardware collaboration technology, and uses FPGA technology to improve system performance and stability.

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