T2080 custom board stop at

[tapyang]

Hi, Dear experts:

We designed a t2080 custom board refer to T2080RDB-PC. And we deleted the CPLD, and used fixed pins

connection in contrast to T2080RDB-PC.

I burn the RCW(0xe8000000 ~ 0xe801ffff) and U-BOOT(0xeff40000 ~ 0xefffffff) to custom board's NOR FLASH, then it can not start up!

I use the CodeWarroir debug the U-BOOT, It shows that it stop at "STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)" in start.s.

The RCW register is shown as attachments.

I think the RCW has loaded and have jumpped to the U-BOOT. But,  Why it stopped at start.s?

What shoud I modify the RCW or U-BOOT or Hardware?

Expecting your reply and Thank you very much!

[tapyang]

OK, Thanks~

Wish you have a nice day!

[ufedor · Accepted solution]

Use CodeWarrior to debug U-Boot execution starting from the address 0xFFFFFFFC in NOR Flash to determine exact instruction causing the exception - refer to the Targeting_PA_Processors.pdf, 7.6 Debugging U-Boot using NOR, NAND, SPI, and SD Card/MMC Flash Devices.