AM62A3: Question about AM62Ax

Wood Sandal

Part Number: AM62A3

Tool/software:

Hi, TI experts,

when I checked the AM62Ax Sitara Processors Technical Reference Manual and linux sdk V10.01, I found that there are several concepts that I don't quite understand. Please help me answer my questions:

Q1. When the system starts up, it mentions M4 ROM code. What does M4 refer to?Is the Arm Cortex-R5F Processor (R5FSS) in Device WKUP Domain?

Q2.In the prebuilt-filesystem, I found this firmware for R5F named ipc_echo_test_mcu2_0_release_strip.xer5f. May I ask which core is this for?

Q3.What is the purpose of this firmware named ipc_echo_testb_mcu1_0_release_strip.xer5f in <linux-sdk-path>/board-support/prebuilt-images ? Is the firmware of MCU-R5F?

Q4.In the SDK manual, I found the following description of the startup process, but I have a few questions

What does TIFS refer to? M4?
What does MAIN R5F mean? I understand it should mean MCU R5F, right?
Which firmware does the Load r5f firmware refer to?

2 months ago

0 Wood Sandal 2 months ago

Prodigy 135 points

Is there any update?

0 Nick Saulnier 2 months ago in reply to Wood Sandal

TI__Guru** 101630 points

Hello there,

Boot flow

We support 2 ways of initializing the processor: SPL boot, and SBL boot. You can find more information about each boot flow in the AM62Ax academy > Multicore > Boot flows: SPL vs SBL
https://dev.ti.com/tirex/explore/node?node=A__AZnGm6MPlXHB0zpbZBivKw__AM62A-ACADEMY__WeZ9SsL__LATEST

Cores on the AM62Ax

There are 2 R5F cores on AM62Ax: DM R5F (which runs the Device Management firmware, along with the VPAC/ISP firmware on typical AM62Ax usecases), and the MCU R5F.

The DM R5F (which is in the WAKEUP power domain, not the MCU or MAIN power domains) is the core that is used for SPL or SBL.

After the DM R5F finishes running the SPL or SBL code, it loads the DM R5F runtime code into itself.

This is different from how the other non-Linux cores on the AM62Ax. For more information about how all those other cores get loaded, please refer to the AM62Ax academy > multicore > Methods to initialize remote cores
https://dev.ti.com/tirex/explore/node?node=A__AWpHX3tkZpsGgP46fOsCQQ__AM62A-ACADEMY__WeZ9SsL__LATEST

That mcu-r5f0_0 firmware that you found is for loading into the MCU R5F core.

The ti-dm folder firmware that you found is the prebuilt firmware that gets loaded into the DM R5F. That is the DM R5F runtime code.

The Linux > Booting Remote Cores page might also be interesting for you:
https://dev.ti.com/tirex/explore/node?node=A__AX2DLf3J3o-JHYMSq7Eg0w__AM62A-ACADEMY__WeZ9SsL__LATEST

Regards,

Nick

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AM62A3: Question about AM62Ax