Memory management method and device and embedded system

Abstract

The embodiment of the invention discloses a memory management method and device and an embedded system. The method includes the steps that when current memory residual resources of a memory in an SOC are larger than or equal to K and an idle physical memory block of which the space is larger than or equal to K does not exist in the memory in the SOC, N idle physical memory blocks in the memory of the SOC are used for constructing virtual memory blocks of which the virtual addresses are continuous and the size of the space is K, and the virtual memory blocks are distributed, wherein K represents the size of memory space to be applied, the size of total space of the N idle physical memory blocks is K, N is an integer larger than or equal to 2, and the physical address of the physical memory blocks is continuous; in the initial process, the memory of the SOC is a whole idle memory block. Thus, the discrete idle physical memory blocks are combined into the virtual memory blocks of which the addresses are continuous, and therefore distribution of space with the continuous addresses is achieved.

Description

technical field [0001] The present invention relates to the field of computer technology, more specifically, to a memory management method, device and embedded system. Background technique [0002] The embedded system can be applied in various scenarios, and the various scenarios involve the management of on-chip memory of a system-on-chip (System On Chip, SOC) in the embedded system. [0003] In the existing method, a dynamic method can be used to manage the SOC on-chip memory. However, after the system has been running for a period of time, discrete physical address segments often exist. In some scenarios, although the current remaining memory resources are greater than or equal to the size of the requested memory space, the allocation of continuous address space cannot be realized due to the scattered physical address segments, resulting in memory application failure. [0004] For example, assuming that the size of a physical address is b, the current physical address s...

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Problems solved by technology

[0005] In view of this, the purpose of the embodiments of the present invention is to provide a memory management method, device and embedded system to solve the problem that although the current remaining memory resources are greater than or equal to the requested memory space size, due to the scattered physical memory space, it cannot Realize the allocation of continuous memory space, which leads to the failure of memory application

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