Method and device for memory management

Abstract

The embodiment of the present application provides a memory management method and device, which determines the target variable to be calibrated and the target virtual address area corresponding to the target variable, and determines the first mapping table entry where the target virtual address area is located in the MMU mapping table, wherein The first mapping entry includes a mapping relationship between the first virtual address area and the first ROM address area, and a mapping relationship between the second virtual address area and the second ROM address area, the target virtual address area is located in the first virtual address area, Then the first virtual address area can be mapped to the target RAM address area, and the second virtual address area can be mapped to the second ROM address area, so the target variable can be marked according to the first virtual address area, and the first virtual address area only is a part of the address area corresponding to the first mapping entry, so less RAM space is used when calibrating the target variable.

Description

technical field [0001] The invention relates to the field of computers, in particular to a memory management method and device. Background technique [0002] At present, the operating system generally adopts a virtual memory management (Virtual Memory Management) mechanism, which can run relatively large applications on the processor. The virtual memory management mechanism requires the support of an MMU (Memory Management Unit, memory management unit). [0003] Specifically, when the MMU is not set or the MMU is not enabled, the processor can access the physical memory through the memory address. At this time, the memory address is a real address, called a physical address (Physical Address, PA). Therefore, the memory address will directly act on the chip pins of the physical memory; after the MMU is enabled, the memory address used by the processor to access the physical memory is an artificially set address, called a virtual address (Virtual Address, VA), MMU The virtual...

AI Technical Summary

Problems solved by technology

However, the capacity of RAM is usually small, and RAM is also used for stacks, global variables, etc., and there is not enough space for variable calibration

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