Unable to run standalone application using Uboot in Beaglebone black

Mani Sathasivam

Hi all,

I've been trying to run standalone application using Uboot in Beaglebone black but unable to do so. I'm using y-modem 'loady' to load the binary and 'go' to run it.

According to the discussion here, I used load address same as that of env variable 'load_addr' (0x82000000). I don't know what is going wrong here.

When I see the _start address of the binary using objdump, it is showing the same address. So, every time I'm able to load the binary but unable to run it.
Even I tried with standalone example from uboot sources too.

Here are the commands I used:

loady 0x82000000

go 0x82000000

Any help would be greatly appreciated.

Thanks,

Mani.

over 7 years ago

0 Pavel Botev over 7 years ago

TI__Guru**** 170625 points

Hi Mani,

Mani Sathasivam said:
I've been trying to run standalone application using Uboot in Beaglebone black but unable to do so.

Do you use TI PSDK?

Mani Sathasivam said:
According to the discussion here,

The link you have provided is broken. Can you provide it again?

Do you try to load and run the application from first stage bootloader (u-boot-min, MLO) or from second stage bootloader (u-boot.bin)? How you create this application and is the file format?

Regards,
Pavel

0 Titusrathinaraj Stalin over 7 years ago

TI__Guru** 116100 points

Please refer to this post.
e2e.ti.com/.../1952094\

You may have to use different address which is defined to run standalone app by AM35x (BBB)

0 Cvetolin Shulev-XID over 7 years ago

TI__Guru 65405 points

Hi Mani,

Do you have some indication on the console that the 'loady' command complete successfully?
Here is some details about loading file with U-boot via serial port:
blackfin.uclinux.org/doku.php

BR
Tsvetolin Shulev

0 Mani Sathasivam over 7 years ago in reply to Pavel Botev

Intellectual 365 points

Hi Pavel,

Sorry for the broken link. Below is the link to the discussion:

e2e.ti.com/.../614814

I'm trying to run the application from 2nd stage bootloader (uboot.bin). For creating the standalone application, I used same linaro compiler used for building uboot (arm-linux-gnueabihf-) with the following compiler options:

-Wall -Werror -nostdlib -nostartfiles -ffreestanding

The linker script is:

MEMORY
{
ram : ORIGIN = 0x80200000, LENGTH = 0x10000
}

SECTIONS
{
.text : { *(.text*) } > ram
}

0 Mani Sathasivam over 7 years ago in reply to Cvetolin Shulev-XID

Intellectual 365 points

Hi Tsvetolin,

Yes. 'loady' successfully transferred bytes to the desired location. I'm able to see from the console output.

0 Mani Sathasivam over 7 years ago in reply to Titusrathinaraj Stalin

Intellectual 365 points

Hi Titusrathinaraj,

I've used different addresses (0x80300000/0x82000000) but nothing worked. I will tell you what I did, please correct me if I did anything wrong.

I changed the CONFIG_STANDALONE_LOAD_ADDR value in arch/arm/config.mk file. Uboot standalone application also uses the same address in Makefile. I double checked using objdump. But, whenever I run the app, I'm getting 'undefined instruction' error for this and 'data abort' error for my custom app.

0 Pavel Botev over 7 years ago in reply to Mani Sathasivam

TI__Guru**** 170625 points

Mani,

Mani Sathasivam said:
But, whenever I run the app, I'm getting 'undefined instruction' error for this and 'data abort' error for my custom app.

Can you provide us full console log?

See also if the below pointers will be in help:

ti-processor-sdk-linux-am335x-evm-03.00.00.04/board-support/u-boot-2016.05/doc/README.standalone

ti-processor-sdk-linux-am335x-evm-03.00.00.04/board-support/u-boot-2016.05//README

Regards,
Pavel

0 Mani Sathasivam over 7 years ago in reply to Pavel Botev

Intellectual 365 points

Hello all,

Finally I'm able to run baremetal applications on Beaglebone Black. Its actually the compiler issue. I was using arm-linux-gnueabihf, it should be arm-none-eabi for baremetal programs.

Thank you all for your support.

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Unable to run standalone application using Uboot in Beaglebone black