AM62P: Undefined reference to 'board_init' when building U-boot for R5 with Falcon Mode

Oliver Borowski

Part Number: AM62P

I'm working on reducing the boot time of the SK-AM62P-LP using the Linux-RT SDK 11.01.16.13, and when I attempt to run the command:

$ make -s BOARD=am62px-sk all FALCON_MODE=1

The build fails when it gets to building U-boot for R5 where it fails with the following error:

===================================
Building U-boot for R5
===================================
/home/pcuser/ti-processor-sdk-linux-rt-am62pxx-evm-11.01.16.13/k3r5-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-oe-eabi/arm-oe-eabi-ld.bfd: warning: -z norelro ignored
/home/pcuser/ti-processor-sdk-linux-rt-am62pxx-evm-11.01.16.13/k3r5-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-oe-eabi/arm-oe-eabi-ld.bfd: warning: -z norelro ignored
/home/pcuser/ti-processor-sdk-linux-rt-am62pxx-evm-11.01.16.13/k3r5-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-oe-eabi/arm-oe-eabi-ld.bfd: warning: -z norelro ignored
/home/pcuser/ti-processor-sdk-linux-rt-am62pxx-evm-11.01.16.13/k3r5-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-oe-eabi/arm-oe-eabi-ld.bfd: warning: -z norelro ignored
/home/pcuser/ti-processor-sdk-linux-rt-am62pxx-evm-11.01.16.13/k3r5-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-oe-eabi/arm-oe-eabi-ld.bfd: warning: -z norelro ignored
/home/pcuser/ti-processor-sdk-linux-rt-am62pxx-evm-11.01.16.13/k3r5-devkit/sysroots/x86_64-arago-linux/usr/libexec/arm-oe-eabi/gcc/arm-oe-eabi/13.4.0/ld: /tmp/cc1n5MPW.ltrans2.ltrans.o:(.data.init_sequence_r+0x2c): undefined reference to `board_init'
collect2: error: ld returned 1 exit status
make[2]: *** [/home/pcuser/ti-processor-sdk-linux-rt-am62pxx-evm-11.01.16.13/board-support/ti-u-boot-2025.01+git/Makefile:1824: u-boot] Error 1
make[1]: *** [Makefile:177: sub-make] Error 2
make: *** [makerules/Makefile_u-boot:41: u-boot-r5] Error 2

I have also tried running:

$ make am62px_evm_r5_defconfig

before attempting to 'make all' which then advised me to run 'make mrproper', which after executing and rerunning 'make all' still gives the same error.

5 months ago

0 Bin Liu 5 months ago

TI__Guru**** 177101 points

Hi Oliver,

Oliver Borowski said:
I'm working on reducing the boot time of the SK-AM62P-LP using the Linux-RT SDK 11.01.16.13, and when I attempt to run the command:
$ make -s BOARD=am62px-sk all FALCON_MODE=1

Where do you get this build instruction from?

I searched 'FALCON_MODE' in the entire SDK 11.01.16.13, but don't find any reference to it.

dev@ula:am62px-plsdk-111gd$ grep FALCON_MODE * -r
dev@ula:am62px-plsdk-111gd$

0 Oliver Borowski 5 months ago in reply to Bin Liu

Prodigy 50 points

Under section 4.1.12.2.1 Secondary Boot Loader, in the Linux Developer's Guide documentation there is a mention of AM62PX Falcon Mode:

4.1.12. Boot Time Optimizations — Processor SDK AM62Px Documentation

Which takes you to the AM62Px MCU+ SDK documentation: AM62Px MCU+ SDK: Booting Tools

Where there is the following command:

For Falcon
  cd ${SDK_INSTALL_PATH}/tools/boot/linuxAppimageGen
  make -s BOARD=am62px-sk all FALCON_MODE=1

I had also found this forum post: (+) SK-AM62P-LP: FALCON MODE - Processors forum - Processors - TI E2E support forums

Where the method used to compile u-boot in falcon mode used the same command.

0 Bin Liu 5 months ago in reply to Oliver Borowski

TI__Guru**** 177101 points

Oliver Borowski said:
Which takes you to the AM62Px MCU+ SDK documentation: AM62Px MCU+ SDK: Booting Tools

Where there is the following command:

Okay, this make instruction is for the MCU SDK, not the Linux SDK. I am routing your query to our MCU SDK expert for comments.

0 Suren Porwar 5 months ago in reply to Bin Liu

TI__Mastermind 34250 points

Hi Oliver,

As Bin pointed, this requires you to download MCU+SDK from here.

Follow the instructions provided in How to boot quickly documentation which you have already referred.

Let us know if you have any issues building MCU+SDK and following the instructions provided.

Best Regards,

Suren