PROCESSOR-SDK-AM64X: Linux remoteproc support to boot/start AM64x PRU

Martin Kohlmann

We just received a TMDS64GPEVM.

Unfortunately we are missing support to load the firmware into the PRU from A53 Linux using remoteproc.
There are only remoteproc entries to load the R5Fs.

root@am64xx-evm:~# ls /sys/class/remoteproc/ -lah
drwxr-xr-x    2 root     root           0 Jan 27 04:00 .
drwxr-xr-x   63 root     root           0 Jan 27 04:00 ..
lrwxrwxrwx    1 root     root           0 Jan 27 04:00 remoteproc0 -> ../../devices/platform/bus@f4000/bus@f4000:r5fss@78000000/78000000.r5f/remoteproc/remoteproc0
lrwxrwxrwx    1 root     root           0 Jan 27 04:00 remoteproc1 -> ../../devices/platform/bus@f4000/bus@f4000:r5fss@78000000/78200000.r5f/remoteproc/remoteproc1
lrwxrwxrwx    1 root     root           0 Jan 27 04:00 remoteproc2 -> ../../devices/platform/bus@f4000/bus@f4000:r5fss@78400000/78400000.r5f/remoteproc/remoteproc2
lrwxrwxrwx    1 root     root           0 Jan 27 04:00 remoteproc3 -> ../../devices/platform/bus@f4000/bus@f4000:r5fss@78400000/78600000.r5f/remoteproc/remoteproc3

We are also missing support for am64x in PRU Software Support Package
https://git.ti.com/cgit/pru-software-support-package/pru-software-support-package/tree/include

Is there any other way or configuration needed to load the PRU firmware on am64x?
When will there be software support for remoteproc of PRUs on am64x?

over 4 years ago

0 Nick Saulnier over 4 years ago

TI__Guru** 107790 points

Update June 2 2021: Point to CCS setup documentation for SDK 7.3

Hello Martin,

TIMEFRAMES

* In general, reference the AM64x Software Build Sheet for when software will become available. As of 5/19/2021 the PRU portion of that sheet has some mistakes. The sheet will be corrected soon.
* We are adding AM64x PRU support to the Linux RemoteProc driver in the Processor SDK 8.0 release coming in several months.
* I am working on adding AM64x support to the PRU Software Support Package (PSSP) now. It will also be made available by the Processors SDK 8.0 release.
* We will also finish migrating the PRU wiki pages to the SDK documentation during this timeframe
* We will also publish documentation for the Getting Started Labs during this timeframe. The code for the Getting Started Labs is already in your PSSP under labs/Getting_Started_Labs.

WHAT CAN YOU DO NOW?

AM65x Silicon Rev 2.0 ICSSG is very similar to AM64x ICSSG. See Technical Reference Manual (TRM) chapters for details. So you can actually use AM65x ICSSG projects and get them running on AM64x using Code Composer Studio. Just keep in mind things like the header files might no longer apply.

Setting up CCS: AM64x MCU+ SDK: Getting Started
4. CCS Setup for AM64x — Platform Development Kit (PDK) - AM64X User Guide (ti.com)

AM65x projects you can use as a template: In the PSSP, see examples/am65x and labs/getting_started_labs (look for the solutions folder).

I have attached VERY PRELIMINARY notes for the Getting Started Labs documentation (compiling C code in CCS, debug from CCS). Hopefully it is helpful for you after you set up CCS for AM64x. The hands-on Labs documentation are another good resource. FUTURE CUSTOMERS: this file is probably out of date by the time you are reading this post. If THIS LINK takes you to the SDK documentation instead of another e2e post, that means updated Getting Started Labs information is now in the SDK documentation.

210519 PRU Getting Started Labs EARLY DRAFT.docx

Regards,

Nick