Add ADSP SC5xx System Protection Unit info by Brandon-Hurst · Pull Request #411 · analogdevicesinc/documentation

Brandon-Hurst · 2026-04-07T00:12:04Z

This PR adds documentation for the System Protection Unit (SPU) to the current ADSP Linux documentation. This gives concise information summarized from the SC5XX Hardware Reference Manual about the SPU, which could aid in building systems which for one reason or another may produce resource contention between ARM Linux & SHARC applications by allowing both processors to compete or race for access to peripherals, DMA, interrupts, memory, etc.

Type

Documentation
Bug fix
New feature
Continuous integration

Checklist

I have performed a self-review of changes
I have followed the guidelines:
I have used the appropriate roles and directives:
- https://analogdevicesinc.github.io/doctools/docs_guidelines/roles.html
- https://analogdevicesinc.github.io/doctools/docs_guidelines/directives.html
I ensured that binary data was committed to git lfs:
- https://analogdevicesinc.github.io/documentation/contributing/creating_new_pages.html#adding-images-and-other-binary-files
I have built the pages I edited or created, using either make html or adoc serve:
- https://analogdevicesinc.github.io/doctools/cli.html#serve
I have signed-off my commits and believe my contribution improves the repository.

gastmaier · 2026-04-07T08:56:51Z

llm review (sonnet 4.6): https://github.com/analogdevicesinc/documentation/actions/runs/24072392659

pamolloy · 2026-04-07T13:03:06Z

For general reference, this is similar documentation from ST:

https://wiki.st.com/stm32mpu/wiki/Resource_Isolation_Framework_overview

pamolloy · 2026-04-07T13:07:17Z

Thanks for putting this together! 🙏

gastmaier

For the vale check, I have better way to run it in the vscode extension (I tree-sit it, keeping only the relevant text parts (skip codeblocks, roles, directives). but I need to figure how to package the same logic for ci/cd.

Detail System Protection Unit info, including configuration method & current status. This hardware block is meant to protect the system from contention by multiple system bus controllers (e.g. cores, DMA) for shared resources & peripherals. Signed-off-by: Brandon Hurst <brandon.hurst@analog.com>

gastmaier requested review from ozan956 and pamolloy April 7, 2026 07:56

pamolloy requested a review from gastmaier April 7, 2026 12:57

pamolloy added this to ADSP Apr 7, 2026