SPL and u-boot differ in NAND read

trichet christophe

Expert 2025 points

Hello

on my AM335x board, based on EVM, we have a NAND of twice the length of the EVM one. The ECC is also BCH8, block size=128K, page 2K, eob=64 bytes.

The nand dump command is OK : we read the good byte.

If we boot on NAND, the SPL is executed, but stops; then with the debugger reading the memory where the u-boot is loaded by SPL, we can see some word difference every 248bytes, 248+128, 248+128+128, 248+128+128+248,248+128+128+248+128.....

Why the SPL wouldn't load u-boot in RAM the same way the nand dump command do ?

thank for any help

best regards

over 11 years ago

0 Miroslav Kiradzhiyski XID over 11 years ago

TI__Mastermind 25235 points

Which SDK/PSP version are you using?

Best regards,
Miroslav

0 trichet christophe over 11 years ago in reply to Miroslav Kiradzhiyski XID

Expert 2025 points

Hello

thanks for the reply

I use SDK from Pengwyn SILICA, based on EVM board (u-boot-2012.10-psp05.06.00.00).

regards

0 Miroslav Kiradzhiyski XID over 11 years ago in reply to trichet christophe

TI__Mastermind 25235 points

This is really old and obsolete version of the SDK/PSP. We don't support it any more.

My suggestion is to at least update your U-Boot to a newer version and try this again.

Best regards,
Miroslav

0 AnBer over 11 years ago in reply to trichet christophe

TI__Mastermind 30170 points

Christophe,

You should probably look at TI SDK 6.0 (based on Kernel 3.8 3.2) as it is relatively close to other SDK 5.x.

If you use SDK 7.0 you will see that it makes uses of the device tree and making a board port is really different.

Specifically for NAND you can look at:
For SDK 7.0 (Linux 3.12 using the device tree):
http://processors.wiki.ti.com/index.php/Linux_Core_NAND_User%27s_Guide#ECC_schemes_support

For SDK 6.0 (Linux 3.8 3.2not using device tree):
http://processors.wiki.ti.com/index.php/AM335x_U-Boot_User%27s_Guide#NAND_ECC_algorithm_selection

Anthony

0 Miroslav Kiradzhiyski XID over 11 years ago in reply to AnBer

TI__Mastermind 25235 points

Hi Anthony,

Just a small correction: SDK v6.0 is based on kernel 3.2, not 3.8. :) As far as I know the Angstrom distribution is based on kernel 3.8, but it isn't supported on this forum.

Best regards,
Miroslav

0 AnBer over 11 years ago in reply to Miroslav Kiradzhiyski XID

TI__Mastermind 30170 points

Thanks Miroslav!

I edited my post to make the change.

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SPL and u-boot differ in NAND read