2015/07/24

ARM Memory Types

Even ARM itself thinks Device type and Strongly Ordered are confusing.

In Programmer's Guide for ARMv8-A, it says:



13.1 Memory types
The ARMv8 architecture defines two mutually-exclusive memory types. All regions of memory are configured as one or the other of these two types, which are Normal and Device. A third memory type, Strongly Ordered, is part of the ARMv7 architecture. The differences between this type and Device memory are few and it is therefore now omitted in ARMv8.
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