PROCESSOR-SDK-AM64X: AM64X SKEVM Board Unable to read file u-boot.img

Kevin Peng

SDK version used: 08.02.00.23 (05 MAY 2022)

Board used: AM64x SKEVM

After "sudo xxxxx/create-sdcard.sh", I tried selecting default image, base image, and tiny image separately in the different time, but all failed about reading file u-boot.img when the connection ready to boot, and this file actually exists.

I put the information corresponding to the selection of tiny image shown below:

U-Boot SPL 2021.01-g44a87e3ab8 (May 05 2022 - 17:43:41 +0000)
EEPROM not available at 80, trying to read at 81
SYSFW ABI: 3.1 (firmware rev 0x0016 '22.1.1--v2022.01 (Terrific Llam')
SPL initial stack usage: 13392 bytes
Trying to boot from MMC2
Starting ATF on ARM64 core...

NOTICE: BL31: v2.5(release):08.03.00.002-dirty
NOTICE: BL31: Built : 17:38:37, May 5 2022

U-Boot SPL 2021.01-g44a87e3ab8 (May 05 2022 - 17:42:22 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0016 '22.1.1--v2022.01 (Terrific Llam')
Trying to boot from MMC2
Error reading cluster
** Unable to read file u-boot.img **
No matching DT out of these options:

No matching DT out of these options:

SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

Thanks for helping !

over 2 years ago

0 Hong Guan64 over 2 years ago

TI__Guru 68080 points

Hello,
It looks like "tiboot3.bin" and "tispl.bin" boot up, but somehow not able to load "u-boot.img" on your board.
Have you tried other SD creation option as listed below? or trying on a different SD card?
software-dl.ti.com/.../Processor_SDK_Linux_create_SD_card.html
Best,
-Hong

0 Kevin Peng over 2 years ago in reply to Hong Guan64

TI__Expert 3752 points

Hi Hong,

Thanks for your reply!

Now I know why this happens, I used SD card with 4 GB previously, when I change it to 16 GB, the problem can be solved.

I find out there is a restriction about the SD card size shown below:

https://dev.ti.com/tirex/content/tirex-product-tree/am64x-devtools/docs/am64x_skevm_quick_start_guide.html

May I know why there is a restriction of the SD card Size?

When I used 4 GB SD card, the space is enough and has much empty space after the card has been built.

I do not know why the size of SD card is a problem here.

Kind Regards,

Weilun

0 Hong Guan64 over 2 years ago in reply to Kevin Peng

TI__Guru 68080 points

Hello,
The issue could be due to one of SD card factors: brand, size, or speed class...
Best,
-Hong

0 Kevin Peng over 2 years ago in reply to Hong Guan64

TI__Expert 3752 points

Hi Hong,

I tried multiple SD cards with the same brand, the only difference is the size. I find that the size of the SD card less than 16 GB will not work. And the user guide also suggests that we need SD card with capacity higher than 16 GB. Now I just want to know why we need a large capacity here. After creating the SD card, I found only a few space is used, there is much empty space left in the 4GB card. So I am very curious about why we need capacity higher than 16GB?

Thanks again for your help!

Kind Regards,

Weilun

0 Tony Tang over 2 years ago in reply to Hong Guan64

TI__Mastermind 28912 points

Hong,

How do you think if it is a bug or limitation in tispl.bin?

0 Hong Guan64 over 2 years ago in reply to Tony Tang

TI__Guru 68080 points

Hello Tony, Weilun,
There were early reports on intermittent issue on booting from SD card - brand, size, speed class (especially).
But there's no conclusive finding on the exact cause
Best,
-Hong

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PROCESSOR-SDK-AM64X: AM64X SKEVM Board Unable to read file u-boot.img