System-dt February 2022

system-dt@lists.openampproject.org

4 participants
5 discussions

by Bill Mills

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

2 years, 2 months

2022-02-08 System DT Meeting notes, action items, recording link

by Nathalie Chan King Choy

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

2 years, 2 months

Dual core MCU with secure and non-secure views of one bus

by Bill Mills

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

2 years, 2 months

System DT call is about to begin!

by Nathalie Chan King Choy

Hi all, Reminder that we're about to begin the System DT call. Best regards, Nathalie

2 years, 2 months

Calling for agenda: System Device Tree - February

by Nathalie Chan King Choy

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 [https://st2.zoom.us/static/5.2.4485/image/new/ZoomLogo_110_25.png]<https://zoom.us/> Hi there, Nathalie Chan King Choy is inviting you to a scheduled Zoom meeting. Join Zoom Meeting<https://xilinx.zoom.us/j/97127352429?pwd=ZDIvN3FlRzZtY0QyNzdOdWRPK21RUT09&f…> Phone one-tap: US: +16699006833,,97127352429#,,,,,,0#,,7513639145#<tel:+16699006833,,97127352429#,,,,,,0#,,7513639145#> or +17209289299,,97127352429#,,,,,,0#,,7513639145#<tel:+17209289299,,97127352429#,,,,,,0#,,7513639145#> Meeting URL: https://xilinx.zoom.us/j/97127352429?pwd=ZDIvN3FlRzZtY0QyNzdOdWRPK21RUT09&f… Meeting ID: 971 2735 2429 Passcode: *jvt9D0B^? Join by Telephone For higher quality, dial a number based on your current location. Dial: US: +1 669 900 6833 or +1 720 928 9299 or +1 929 205 6099 or 888 475 4499 (Toll Free) or 833 548 0276 (Toll Free) or 833 548 0282 (Toll Free) or 877 853 5257 (Toll Free) India: +91 226 480 2722 or +91 22 71 279 525 or +91 406 480 2722 or +91 446 480 2722 or +91 806 480 2722 or +91 80 71 279 440 or +91 116 480 2722 or +91 22 48 798 004 or +91 224 879 8012 or 000 800 050 5050 (Toll Free) or 000 800 001 4002 (Toll Free) Ireland: +353 1 536 9320 or +353 1 653 3895 or +353 6 163 9031 or 1800 901 561 (Toll Free) or 1800 943 965 (Toll Free) or 1800 949 238 (Toll Free) Singapore: +65 3165 1065 or +65 3158 7288 or 1800 407 5602 (Toll Free) or 800 101 3814 (Toll Free) or 800 852 6054 (Toll Free) Meeting ID: 971 2735 2429 Passcode: 7513639145 International numbers<https://xilinx.zoom.us/u/aeqGSA76o> Join from a Video Conference room system Meeting ID: 971 2735 2429 Passcode: 7513639145 US: 97127352429(a)global.zoomcrc.com<mailto:97127352429@global.zoomcrc.com> Passcode: 7513639145 APAC: 97127352429(a)global.zoomcrc.com<mailto:97127352429@global.zoomcrc.com> Passcode: 7513639145 India: 97127352429(a)global.zoomcrc.com<mailto:97127352429@global.zoomcrc.com> Passcode: 7513639145 Europe: 97127352429(a)global.zoomcrc.com<mailto:97127352429@global.zoomcrc.com> Passcode: 7513639145 SIP: 97127352429(a)zoomcrc.com<mailto:97127352429@zoomcrc.com> Passcode: 7513639145

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System-dt February 2022