~/talk

System Device Tree Project

on YouTube 26m
Talkat Linaro Tech Days 2020 · 2020-03-24..03-25· [web-platform, embedded-and-hardware]

speakers

name:Bruce Ashfield
bluesky:zeddii.bsky.social
name:Miklos Balint
links:none on file
name:Daniel Stone
links:none on file

resources

video:https://youtu.be/2o-B21unV9M
slides:none on file

summary

System Device Trees extend Device Tree to describe whole heterogeneous SoCs and record allocations so OSes, hypervisors and firmware get consistent wiring, memory and device ownership. It adds execution domains and an address_map for indirect buses and per-cluster interrupt controllers, and a top-level domains node for per-domain chosen/reserved-memory. The Lopper tool (BSD‑3) prunes an 84‑element SDT to a 41‑node standard DTS/DTB, emits C headers for RTOSes and can generate bus‑firewall inputs.

AI-written summary · about

chapters (19)

  1. 0:00Intro
  2. 0:51What is a System Device Tree?
  3. 3:44What is an "Execution Domain"?
  4. 3:56Execution Domains and Operating Environ
  5. 5:19What's the difference between System DT
  6. 6:52Hardware Description: an example
  7. 8:58How do we describe interrupts?
  8. 11:29How do we dedicate assignable resources CPUs clusters?
  9. 11:50Configuration: execution domains . An execution domain is a collection of software, firmware, and board configurations that enable an operating system or on application to run a CPUs cluster
  10. 13:54How do we configure Bus Firewalls?
  11. 14:06Bus Firewalls & Device Assignment Devices are assigned to execution domains using access memory access have the information necessary to configure bus firewals
  12. 14:49Bus Firewalls & Priorities The bus firewall configuration can be derived from memory, access, and the capability of the bus firewall • Bus lirewalls might not be able to protect everything We need to set priorities for bus firewall protection From one execution domain point of view.
  13. 16:00What about chosen and reserved-memory
  14. 17:41Lopper Lopper
  15. 20:19What are the components of Lopper?
  16. 20:29Lopper Components
  17. 21:31How do I run Lopper to create a traditional DT ?
  18. 21:41Generating a traditional DT (3/3)
  19. 23:55Lopper: RTOS without DT support?

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