Porting TF-A firmware to a custom stm32mp157a board does not boot

[ZYong.2]

My custom board is based on stm32mp157a-dk1,remove the pmic and usb type c circuit,

My porting steps are as follows:

1. porting u-boot, verify that u-boot functions properly, compile the uboot trusted image, copy u-boot.dtb to FIP_artifacts/u-boot/ and rename it to u-boot-stm32mp157a-custom-trusted.dtb, copy u-boot- nodtb.bin to FIP_artifacts/u-boot/ and rename it to u-boot-nodtb-stm32mp15.bin

2. modify optie-os-stm32mp-3.12.0.r1-r0 source code, add custom dtsi and dts file, modify dtsi and dts file, add custom board in Makefile.sdk file CFG_EMBED_DTB_SOURCE_FILE, use make -f $PWD/ ... /Makefile.sdk CFG_EMBED_DTB_SOURCE_FILE=stm32mp157a-custom all command to generate tee-header_v2-stm32mp157a-custom.bin, tee-pageable_v2-stm32mp157a -custom.bin, tee-pager_v2-stm32mp157a-custom.bin three files and copied to the FIP_artifacts/optee/ directory, in the use of the command is an error prompt can not find other custom board related files in the FIP_artifacts/ directory, but can generate corresponding .bin files

3. Modify the tf-a source code, add custom device tree and custom-fw-config.dts, modify the corresponding device tree file, add custom board define in Makefile.sdk ,use make -f $PWD/... /Makefile.sdk -j8 TFA_DEVICETREE=stm32mp157a-custom TF_A_CONFIG=trusted ELF_DEBUG_ENABLE='1' all command to generate bl32 fwconfig folder and Copy the bl32 fwconfig folder to the FIP_artifacts/arm-trusted-firmware folder , use the command to generate the bl32 fwconfig folder with the error that some files under FIP_artifacts/ cannot be found, but it does not affect the generation of the bl32 fwconfig folder and corresponding files. fwconfig folder and the corresponding files

4. Use make -f $PWD/... /Makefile.sdk -j8 fip command to generate the fip-stm32mp157a-custom-trusted.bin and tf-a-stm32mp157a-custom-sdcard.stm32 firmware, using

  sudo dd if=tf-a-stm32mp157a-custom-sdcard.stm32 of=/dev/sdb1 conv=fdatasync

  sudo dd if=tf-a-stm32mp157a-custom-sdcard.stm32 of=/dev/sdb2 conv=fdatasync

  sudo dd if=fip-stm32mp157a-custom-trusted.bin of=/dev/sdb3 conv=fdatasync

Synchronize the firmware and select the sd card to boot

As a result the serial port prints the following message.

PANIC at PC : 0x2fff2d17

Exception mode=0x00000016 at: 0x2fff2d17

The only thing I can guarantee is that u-boot has been successfully ported and working, other parts of the port only modify the device tree file, each part of the device tree are referred to the u-boot device tree to do cut, I hope someone can solve my problem!

Thank you very much!

[Olivier GALLIEN]

Hi @ZYong.2​ ,

Just starting to look at your post.

Nothing obvious so far.

Did you progress your side ?

Please confirm what you have shared is the TF-A dts ?

Can you share the complete boot log trace.

Thanks,

Olivier

[ZYong.2]

Thank you for your reply, I have not solved this problem at the moment, the file I shared is the device tree file that needs to be modified to generate the custom TF-A, the file is referenced to the stm32mp157a-dk1 development board and modified according to the steps I mentioned.

[PatrickF]

Hi,

maybe a classic pitfall: our boards DTs are defining HSE in bypass for external oscillator. If you use a crystal, you need to adapt DT.

See https://community.st.com/s/article/FAQ-STM32MP1-bring-up-troubleshooting-guide

Could be also linked to issue during DDR initialization (which involve PMIC on our board to start related supplies).

You should first focus on HW related changes Vs STM32MP157A-DK1 which might need DT changes.

See also:

https://wiki.st.com/stm32mpu/wiki/How_to_compile_the_device_tree_with_the_Developer_Package

Regards.