Memory space management and memory access control method and device

Abstract

The invention discloses a memory space management and memory access control method and device. The method comprises the steps that when access requests are received, access addresses and visitor identifiers in the access requests are obtained; current states of the memory space pointed by the access addresses are checked, and first check results are obtained, wherein the states of the memory space comprise a first state and a second state; searches are conducted to determine whether or not the visitor identifiers belong to an access permission collection corresponding to the checked results in multiple access-permitted collections; an instruction is generated according to the search results, wherein the instruction is used for allowing or not allowing a visitor to access the memory space. Through the above approach, the memory space management and memory access control method is capable of reducing waste of memory resources and reducing system costs.

Description

technical field [0001] The invention relates to the storage field, in particular to a memory space management and memory access control method and device. Background technique [0002] The security issue of the open environment of terminal equipment has attracted more and more attention, not only for terminal users, but also for service providers, mobile operators and chip manufacturers, especially for UHD (UltraHigh Definition Television, Ultra High Definition Television) that TVs and set-top boxes need to deal with. ) streaming content and UHD+ streaming content. [0003] In order to protect media content, DRM (Digital Rights Protection) based on TEE (Trusted Execution Environment, Trusted Execution Environment) technology has almost become an essential requirement for ultra-high-definition content providers. A Linux-based operating system) coexists in an operating environment, and trusted applications (TA) developed by third parties run in the TEE environment to provide ...

AI Technical Summary

Problems solved by technology

For some terminal devices, the required secure memory space is relatively large. For example, for a playback terminal that supports UHD, a chip that supports single-channel UHD decoding and image enhancement requires a total of more than 200MB of secure memory, supports dual-channel UHD decoding or supports UHD+ decoding chips require a total of more than 350MB of security memory, so the terminal equipment often needs to be equipped with a large-capacity independent security memory, resulting in an increase in system costs

Moreover, when the hardware unit in the safe state is not working, the large-capacity safe memory is in an idle state, so the storage resources are wasted

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