AM5728: Invalid magic number error

sai swarna sivanoori

Other Parts Discussed in Thread: AM5728

Hello,

When am loading the app file and MLO file of IDK AM5728 onto the SDcard and when trying to boot on the AM5728 IDK board showing the error "INVALID MAGIC NUMBER". Can i know what does it mean ?

Thanks and regards,

Swarna

over 6 years ago

0 Dwarakesh Radhakrishnan over 6 years ago

Guru 13620 points

Hi,
It means the magic number in the MLO header is corrupt or not present. It could mean wrong MLO binary mostly.

0 sai swarna sivanoori over 6 years ago in reply to Dwarakesh Radhakrishnan

Intellectual 470 points

Thanks Dwarakesh,

I changed the MLO eventhough am getting the same error INVALID MAGIC ERROR AND UNABLE TO BOOT THE APPLICATION . Can i know what is the actual problem in booting the SDCARD?

0 Biser Gatchev-XID over 6 years ago in reply to sai swarna sivanoori

TI__Guru**** 393215 points

What software is this? Linux or RTOS?

0 sai swarna sivanoori over 6 years ago in reply to Biser Gatchev-XID

Intellectual 470 points

SYS/BIOS RTOS

Regards,
Swarna

0 Biser Gatchev-XID over 6 years ago in reply to sai swarna sivanoori

TI__Guru**** 393215 points

Thanks. I have notified the RTOS team. They will respond here.

0 Rahul Prabhu over 6 years ago

TI__Guru** 114410 points

Swarna,

The secondary bootloader(MLO) on the AM572x uses RPRC format to parse application binaries and load to device memory. This is different from how we traditional loaded apps on Sitara devices as AM572x is multi-core device with a DSP and M4 so the secondary bootloader is designed to load ARM, DSP and M4 binaries. The RPRC header starts with a MAGIC NUMBER followed by information regarding CORE ID, Load address and size of binary, etc.

After the MLO boots it will try to read the app image and it appears since your app is not in RPRC format, it reports an INVALID MAGIC NUMBER. Did you use the pdkAppImageCreate script or the use the out2rprc and MulitcoreImageCreate Utility provided in the Processor SDK RTOS.

This has been described in the boot section of the Processor SDK documentation:
processors.wiki.ti.com/.../Processor_SDK_RTOS_BOOT_AM57x

The pdkAppImageCreate script is a scripted way to generate the boot image so will not need to deal with COREID and the utilities, you will only need to invoke the script with the correct options as you can see from post build step in any PDK example for AM57xx. If you have only rename the .out to app and then the image will not boot. Please follow the boot generation process and let us know if you still observe this issue.

Regards,
Rahul

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AM5728: Invalid magic number error