Building u-boot for imx7

Technical Support
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1

I built U-boot following the instructions written in the wiki.

export ARCH=arm
export PATH=~/bin/gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf/bin:$PATH
make -j8 2>&1 | tee build.log[link text][1]

I jointed build.log

I took the source from this tag:
https://git.toradex.com/cgit/u-boot-toradex.git/tag/?h=Colibri-iMX7-eMMC_Console-Image_3.0b3.118-20200101

I managed to compile and boot the linux kernel with this toolchain: Downloads | GNU-A Downloads – Arm Developer
https://developer.arm.com/-/media/Files/downloads/gnu-a/9.2-2019.12/binrel/gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf.tar.xz

I flashed the system using toradex easy Installer.

Everything works expect three things which works with the u-boot from the BSP 2020.01.01.

I can’t start any firmware to the Cortex-m4

Following the instructions FreeRTOS on the Cortex-M4 of a Colibri iMX7 | Toradex Developer Center

Colibri iMX7 # fatload mmc 0:1 ${loadaddr} hello_world.elf
...
Colibri iMX7 # bootaux ${loadaddr}
...
## Starting auxiliary core at 0x1FFF8311 ...
Colibri iMX7 #

It works with the u-boot directly compiled from the BSP but not from the one I compiled. I got this message.

Colibri iMX7 # fatload mmc 0:1 ${loadaddr} hello_world.elf
2428444 bytes read in 52 ms (44.5 MiB/s)
Colibri iMX7 # booteaux ${loadaddr}
Invalid aux core address: 98000000

The screen doesn’t work while I am one U-boot. As soon linux started, It works.

I don’t have any boot.scr file. How do I generate it ?

I think, I made something wrong. How to compile correctly u-boot ?

Edit: I found a workaround. I rolled back to an old version, then everything works. u-boot-toradex.git - U-Boot bootloader for Apalis and Colibri modules

2

I found a workaround. I reverted u-boot to an old version.
https://git.toradex.com/cgit/u-boot-toradex.git/tree/?h=2016.11-toradex-next&id=1b121c6ab548a9af0a27876e9eaa0c654c1dc3e1

Then, everything works ! But I would prefer to use a current version of u-boot.

3

I just discovered, this bug has been known.

Looking forward to getting any new !

4

HI @arnaud_infoteam

BSP 2020.01.01.

Which version of Bsp is this ( uanme -a ) ?

I can’t start any firmware to the Cortex-m4

Actually this issue is fixed in 3.0b3.

The screen doesn’t work while I am one U-boot. As soon linux started, It works.

Yeah, currently Display are not supported in the U-Boot version 2019.07.

I don’t have any boot.scr file. How do I generate it ?

Please check this for the instructions.

I think, I made something wrong. How to compile correctly u-boot ?

What exactly have you done?

Best regards,
Jaski

5

Thanks a lot for the reply,

Sorry for the delay, I don’t any update from the community since I changed e-mail, I wil corect this.

Which version of Bsp is this ( uanme -a ) ?

I directly donwloaded u-boot from this BSP version: Colibri-iMX7-eMMC_Console-Image_3.0b3.118-20200101

Once I took the compiled one and I tried to compile myself. Same result. I also compile the kernel myselft so uname -a is not consistent for my case.

# uname -a
Linux mizar 4.14.159 #1 SMP Thu Feb 13 19:24:09 CET 2020 armv7l GNU/Linux

Actually this issue is fixed in 3.0b3

Can you give me the git tag I should use ? I currently use this one u-boot-toradex.git - U-Boot bootloader for Apalis and Colibri modules. Everything works when I compile myself.

I took this one for the new version u-boot-toradex.git - U-Boot bootloader for Apalis and Colibri modules. Then I got the issue.

I will try again this week. I let you know.

Yeah, currently Display are not supported in the U-Boot version 2019.07.

Thanks for the information. I don’t need the screen anymore. I just thought It was a clue that something was wrong.

Please check this for the instructions.

Thanks a lot, I will.

What exactly have you done?

  1. I downloaded the BSP there BSP Layers and Reference Images for Yocto Project Software | Toradex Developer Center
  2. I subsitute the bootfs and rootfs with my versions in image.json
  3. I tried to load my firmware from u-boot tftp ${loadaddr} alcor.elf, bootaux ${loadaddr}
  4. Doesn’t work

I will retry this week, I let you know. Thanks for all the precious informations

6

HI @arnaud_infoteam

Please let us know if you still have the issues?

Best regards,
Jaski