TDA4VM: using SPL+EMMC to fast start R5F, before U-boot load

hongfei zhang

Part Number: TDA4VM

Dear,

we are starting our project referring to ti-processor-sdk-linux-j7-evm-08_02_00_03-Linux-x86-Install.

However, in this SDK, R5F image was loaded and started by kernel, which makes the R5F start too late.

We want to load the image by spl(tiboot3.bin) on MCU R5, right after the sysfw.itb(or A72 ATF) was installed, which will make the R5F0&1 be fast started.

Is our method available? and could you give some suggestion? Do you have any demo to realize our target?

Besides, referring to the SBL mode, the R5F would be fast started by SBL, but we didnt find the method to load the kernel image and FS.

Could you give guide on the SBL mode? what files should i put into the BOOT partition of my SD or EMMC?

thanks.

over 3 years ago

0 Annie Liu over 3 years ago

TI__Genius 10295 points

Hi Team,

Is there any update for this case?

Thanks,

Annie

0 hongfei zhang over 3 years ago in reply to Annie Liu

Prodigy 10 points

not yet. Looking forward your response.

0 Keerthy J over 3 years ago in reply to hongfei zhang

TI__Guru**** 155150 points

Hello,

tiboot3.bin is the first thing to be loaded which is R5F SPL. The R5F SPL loads the A72 ATF/SPL.
Are you talking about MCU domain R5Fs or the Main domain R5Fs. Even the main domain R5Fs
can be loaded by U-Boot.

Here is the detailed boot flow: software-dl.ti.com/.../UG-General-Info.html

Let me know what is you expectation.

- Keerthy

0 Annie Liu over 3 years ago in reply to Keerthy J

TI__Genius 10295 points

Hi Keerthy,

What the customer wants is that the R5F of the main domain is loaded through spl (tiboot3.bin). He wants to complete the startup of the R5F of the main domain before u-boot is loaded.

Thanks,

Annie

0 Keerthy J over 3 years ago in reply to Annie Liu

TI__Guru**** 155150 points

Annie Liu said:
What the customer wants is that the R5F of the main domain is loaded through spl (tiboot3.bin). He wants to complete the startup of the R5F of the main domain before u-boot is loaded

That is NOT supported in the SDK & No plans to support in the future SDK as well. This is a design decision. In case customer has concerns with Main domain R5F boot timing then we recommend customer for use R5 SBL. That can load the Main domain R5F firmware.

Closing this thread.

- Keerthy

0 hongfei zhang over 3 years ago in reply to Keerthy J

Prodigy 10 points

I found a picture, in which, step_10 is my target. Is the demo in the picture available?

0 Keerthy J over 3 years ago in reply to hongfei zhang

TI__Guru**** 155150 points

Hi,

This was the older boot flow pre 7.0 SDK. Post that we do not support loading of main domain R5 Cores from R5 SPL.
The feature was descoped after HSM re-architecture was done. So we do NOT support this as told earlier.

- Keerthy

0 hongfei zhang over 3 years ago in reply to Keerthy J

Prodigy 10 points

Keerthy,

Thanks for your responses.

So, why did you descoped this feature? Any risk ?

And if i want to realize this feature, is there any risk? and could you provide some propose?

0 Keerthy J over 3 years ago in reply to hongfei zhang

TI__Guru**** 155150 points

Loading of remote cores in the new architecture is not palnned to implemented in any of the future SDKs. If that's needed then I request you to use SBL.

Closing this thread.

Best Regards,

Keerthy

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TDA4VM: using SPL+EMMC to fast start R5F, before U-boot load