Memory Protection (Attributes)
chrisj at rtems.org
Tue Dec 6 01:41:04 UTC 2011
On 6/12/11 5:52 AM, Gedare Bloom wrote:
> I am working to bring primitives for real-time memory protection to
> RTEMS, and as a first step I have designed a solution for
> setting/enforcing attributes on memory regions.
Many thanks for taking on this project. It is a valuable contribution to
The design is in three
> layers: a high-level API (cpukit) layer, a middle layer for CPU family
> support (libcpu), and a low-level layer for hardware-specific support
> I have written a description of the API layer  and would appreciate
> any feedback. I prefer to have the feedback given publicly to the
> rtems-devel mailing list (or privately to me directly).
We need some terms to help discuss this topic ("use case" not being
one). I have been playing with 'arenas' as a term. That is "Memory
Protection Arenas". To try and define it ....
Memory Protection Arenas
"A construct with specific memory attributes that can be shared
A Memory Protection Arena is a piece of memory with a descriptor where
some attributes have been set to control the behavior of the memory
area, and executing contexts given access to the memory area. Tasks can
access arenas in a many to one relationship and can be part of more than
I hope that made sense.
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