TDA4VM: about mcu R5 spl

Shine

Part Number: TDA4VM

Hello Champs,

1. In the TDA4VM bootloader doc, it mentions that the mcu R5 spl will load the mcu rtos, does the linux SDK include the related RTOS code? Where is the mcu R5 SPL? If the linux sdk doesn't include the RTOS, how does the board boot?

2. How does the mcu R5F core run?

3. What is the difference between the linux image and linux+rtos image?

/media/$(USER)/BOOT/tispl.bin
/media/$(USER)/BOOT/tiboot3.bin
/media/$(USER)/BOOT/u-boot.img
/media/$(USER)/BOOT/sysfw.itb
/media/$(USER)/rootfs/boot/fitImage

Thanks
Regards
Shine

over 2 years ago

+1 Keerthy J over 2 years ago

TI__Guru**** 170910 points

Hello Shine,

Shine said:
In the TDA4VM bootloader doc, it mentions that the mcu R5 spl will load the mcu rtos, does the linux SDK include the related RTOS code? Where is the mcu R5 SPL? If the linux sdk doesn't include the RTOS, how does the board boot?

The MCU R5F0 core runs the device manager(DM) firmware. The source code for DM part of the RTOS but Linux SDK includes the default DM binary under the board-support/prebuilt-images:

Something like below:

Shine said:
2. How does the mcu R5F core run?

ROM --> MCU R5F SPL --> DM(Device Manager)

Shine said:
/media/$(USER)/BOOT/tispl.bin

This is the A72 SPL binary. This also includes:ATF, OPTEE & DM as well.

Shine said:
/media/$(USER)/BOOT/tiboot3.bin

R5 SPL

Shine said:
/media/$(USER)/BOOT/u-boot.img

A72 U-Boot

Shine said:
/media/$(USER)/BOOT/sysfw.itb

M3 system firmware responsible for foundational security.

Shine said:
/media/$(USER)/rootfs/boot/fitImage

This is the kernel image.

Please follow the below documentation to understand better:

https://git.ti.com/gitweb?p=ti-u-boot/ti-u-boot.git;a=blob;f=board/ti/j721e/README;h=615f3c37bd45f1d88748c98fecb47537d2c768da;hb=refs/heads/ti-u-boot-2021.01

The above link should answer all your questions.

Best Regards,
Keerthy

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TDA4VM: about mcu R5 spl