Dormancy and wake-up system for embedded device based on non-volatile random access memory

Abstract

The invention provides a dormancy and wake-up system for an embedded device based on a non-volatile random access memory. The operating system applied to the embedded device at least comprises a central processing unit and the non-volatile random access memory provided with a CPU (central processing unit) state backup area and a system RAM (random access memory) area for storing dynamic memory information. When the central processing unit receives dormancy signals, related processes in the memory and a device registered in a performance management module are hung up, and information of a CPU register is stored and backed up to the CPU state backup area. When the central processing unit receives wake-up signals, the information of the CPU register stored in the CPU state backup area is loaded to the central processing unit, and the dormant device and processes are waked up based on dynamic memory data in the system RAM area. Owing to the non-volatile random access memory, the dynamic memory data in the system RAM area do not need to be additionally backed up or loaded when the system is dormant and waked up, workload and power consumption of the system in dormancy and wake-up are reduced, and the running speed of the system is increased.

Description

technical field [0001] The invention relates to the field of an embedded operating system, in particular to a dormancy and wake-up system for quickly restoring the running state at the end of the embedded operating system based on state information stored in a non-volatile random access memory. Background technique [0002] Embedded system is an application-centric, computer-based computer system with tailorable software and hardware, which meets the strict requirements of the application system on function, reliability, cost, volume, and power consumption. With the rapid development of embedded technology and semiconductor memory technology, consumers have put forward higher requirements on the startup speed, real-time operation, power consumption and other aspects of embedded products. Therefore, simplifying the boot process of embedded operating systems, shortening the boot time, and reducing system power consumption are of great significance to winning the market positio...

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of dormancy and wake-up system of embedded equipment based on non-volatile random access memory, in order to solve the dormancy and wake-up system of embedded equipment in the prior art. The workload of data backup and loading is relatively large, the system runs slowly, and the system consumes high power.

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