Memory access

OS21, ARM

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Memory access

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Memory access overview

On all ARM variants that are supported by OS21, memory regions can be given various

characteristics such as cacheability and protection modes. These characteristics are

controlled through an MMU.

Exact details of the MMU hardware can be found in the appropriate hardware manual.

OS21 provides two areas of memory access support.

●

Cache support functions are available on all ARM variants. Details are given in the

OS21 User manual (ADCS 7358306).

●

MMU support functions are available on all ARM variants. These functions are provided

using the Virtual Memory API. Details are given in the OS21 User manual (ADCS

7358306).