Hi all,
The next System DT call is on April 26. If you did not receive the calendar invitation and wish to attend, please let me know.
Please let us know if you have agenda items to propose. Here is what I have collected so far:
* SCMI IDs
* Wrap up the secure/non-secure topic
* Passthrough device tree generation for Xen
For system-dt mailing list archives, and to subscribe/unsubscribe someone:
https://lists.openampproject.org/mailman3/lists/system-dt.lists.openampproj…
Thanks & regards,
Nathalie
Hi all,
We can wrap up the secure/non-secure topic and start the topic of passthrough device tree generation for Xen.
Notes from the previous call
https://github.com/OpenAMP/open-amp/wiki/System-Device-Tree-Meeting-Notes-2…
For system-dt mailing list archives, and to subscribe/unsubscribe someone:
https://lists.openampproject.org/mailman3/lists/system-dt.lists.openampproj…
Thanks & regards,
Nathalie
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Hi all,
The notes from today are now available at https://github.com/OpenAMP/open-amp/wiki/System-Device-Tree-Meeting-Notes-2… . The link to the slides and to the Zoom recording are in the notes.
If you spot any errors or important omissions, please feel free to edit the notes directly (just need to log into GitHub).
Thanks & have a great weekend,
Nathalie
Hi all,
Calling for agenda items for next Friday's System DT call. So far, I have:
* Wrapping up the secure/non-secure discussion from Feb call
Thanks & regards,
Nathalie
-----Original Appointment-----
Subject: System Device Tree - March
When: Friday, March 25, 2022 8:00 AM-9:00 AM (UTC-08:00) Pacific Time (US & Canada).
Where: https://xilinx.zoom.us/j/95280412362?pwd=WFJ3SnpFVHZ1ZWlCcXpFOE1GSmxqdz09&f…
Hi all,
Notes from the previous call
https://github.com/OpenAMP/open-amp/wiki/System-Device-Tree-Meeting-Notes-2…
Action items from previous call:
* Stefano: To raise Q w/ Rob in email
* Stefano: Could write System DT part of spec just to add secure-address-map not tied to secure-bus. Secure-address-map could work for range specified through simple bus. Had always thought of the 3 features together, but this can be split out.
* Stefano will write out proposal
* Secure-address-map
* What can be done simpler for simpler cases?
* Stefano: Will continue conv w/ Rob about ranges & reg & what can be done to avoid duplication
* Nathalie & Stefano: Set up another call w/ Rob.
For system-dt mailing list archives, and to subscribe/unsubscribe someone:
https://lists.openampproject.org/mailman3/lists/system-dt.lists.openampproj…
Thanks & regards,
Nathalie
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Hi all,
Notes from the previous call
https://github.com/OpenAMP/open-amp/wiki/System-Device-Tree-Meeting-Notes-2…
Action items from previous call:
* Stefano: To raise Q w/ Rob in email
* Stefano: Could write System DT part of spec just to add secure-address-map not tied to secure-bus. Secure-address-map could work for range specified through simple bus. Had always thought of the 3 features together, but this can be split out.
* Stefano will write out proposal
* Secure-address-map
* What can be done simpler for simpler cases?
* Stefano: Will continue conv w/ Rob about ranges & reg & what can be done to avoid duplication
* Nathalie & Stefano: Set up another call w/ Rob.
For system-dt mailing list archives, and to subscribe/unsubscribe someone:
https://lists.openampproject.org/mailman3/lists/system-dt.lists.openampproj…
Thanks & regards,
Nathalie
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Stefano,
If we do need ranges, regs, and address-maps to contain a "address
space" identifier, then I purpose a #space-cells value. Expected values
are 1 or 0 and assumed to be 0 where not specified.
I think this resolves the ambiguity of meaning in address-cells between
normal DT and system DT.
I am sure it is a bigger change to the tools and spec but adding 1 to
address cells just seems like a hack.
Thanks,
Bill
--
Bill Mills
Principal Technical Consultant, Linaro
+1-240-643-0836
TZ: US Eastern
Work Schedule: Tues/Wed/Thur
Hi all,
The notes from this week's System DT call can be found at https://github.com/OpenAMP/open-amp/wiki/System-Device-Tree-Meeting-Notes-2…
The recording link is posted in the notes, with the passcode.
Action items:
* Stefano: To raise Q w/ Rob in email
* Stefano: Could write System DT part of spec just to add secure-address-map not tied to secure-bus. Secure-address-map could work for range specified through simple bus. Had always thought of the 3 features together, but this can be split out.
* Stefano will write out proposal
* Secure-address-map
* What can be done simpler for simpler cases?
* Stefano: Will continue conv w/ Rob about ranges & reg & what can be done to avoid duplication
* Nathalie & Stefano: Set up another call w/ Rob.
For system-dt mailing list archives, and to subscribe/unsubscribe someone: https://lists.openampproject.org/mailman3/lists/system-dt.lists.openampproj…
Thanks & regards,
Nathalie
Stefano,
https://github.com/zephyrproject-rtos/zephyr/tree/main/boards/arm/mps2_an521
The above is the Zephyr board def for a Dual M33 device & board.
This is not true exactly but you can think of mps2_an521 as the view
from secure world and mps2_an521_ns as the non secure world view.
All the devices in mps2_an521_common.dtsi are avilable at a
non-secure side address: 0x4000_0000 + reg
and
secure side address of 0x5000_0000 + reg
This is the second simple case I mentioned.
It seems to me we should be able to handle this with one *-ranges at the
"soc" bus level. This is similar to how they do this at compile time
with includes.
Bill
--
Bill Mills
Principal Technical Consultant, Linaro
+1-240-643-0836
TZ: US Eastern
Work Schedule: Tues/Wed/Thur
Hi all,
Please let me and Stefano know if you have any requests for agenda items for the System DT call that's happening on Tue, Feb 8, 2022.
Topic request from last call:
* Peripheral protection, secure flag, and sharing IP that are secure/non-secure
Thanks & regards,
Nathalie
-----Original Appointment-----
From: Nathalie Chan King Choy
Subject: System Device Tree - February
When: Tuesday, February 8, 2022 9:00 AM-10:00 AM (UTC-08:00) Pacific Time (US & Canada).
Where: https://xilinx.zoom.us/j/97127352429?pwd=ZDIvN3FlRzZtY0QyNzdOdWRPK21RUT09&f…
Hi all,
Notes from the previous call:
https://github.com/OpenAMP/open-amp/wiki/System-Device-Tree-Meeting-Notes-2…
For system-dt mailing list archives, and to subscribe/unsubscribe someone: https://lists.openampproject.org/mailman/listinfo/system-dt
Best regards,
Nathalie
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