AM4378: Booting Issue

ROSHAN RAJAGOPAL

Part Number: AM4378

Tool/software:

Hi,

I have a non booting custom board , i have open ccs 20.2.0 and in that i connected my jtag and loaded the uboot spl symbol.
I am getting the below error and it does not proceed further

undefined_instruction()	0x402F4040
vectors.S148:0

the below is where it points to

#ifdef CONFIG_SPL_BUILD

#if !CONFIG_IS_ENABLED(SYS_NO_VECTOR_TABLE)
	.align	5
undefined_instruction:
software_interrupt:
prefetch_abort:
data_abort:
not_used:
irq:
fiq:
1:
	b	1b			/* hang and never return */
#endif

Could you help me solve this , I am attaching the register values also at the time of crash with uboot-spl symbol loaded.

Please help me solve or debug this issue so that i can figure out why this board is not booting.The same files boots other boards.I am using the latest ti am437x sdk uboot

Regards,
Roshan Rajagopal

4 months ago

0 Hong Guan64 4 months ago

TI__Guru 72070 points

Here is one referenced guide
https://software-dl.ti.com/processor-sdk-linux/esd/AM437X/09_03_05_02/exports/docs/linux/Foundational_Components/U-Boot/Apps-SPL-Debug.html
Best,
-Hong

0 ROSHAN RAJAGOPAL 4 months ago in reply to Hong Guan64

Intellectual 315 points

Hi,
Yes i have gone through this guide and have done exactly the same , I dont know why it doesnt stop in spl when i do it and passes SPL by the time i pause the processor , but in non booting board i am able to pass through spl step by step as it doesnt load anything , that where i am getting the error i mentioned above

ROSHAN RAJAGOPAL said:
I have a non booting custom board , i have open ccs 20.2.0 and in that i connected my jtag and loaded the uboot spl symbol.
I am getting the below error and it does not proceed further
Fullscreen

i need help in debugging where this issue is coming from and why my board does not boot. I know it maybe some part of the hardware but i am not able to figure out in which section this issue is coming from.Please help me resolve the same

Regards,
Roshan Rajagopal

0 Hong Guan64 4 months ago in reply to ROSHAN RAJAGOPAL

TI__Guru 72070 points

Here're some general options to debug spl/u-boot lockup issue.
0/. power on the board
1/. "attach" JTAG to your board, where "attach" is non-intrusive to the running board or NO HW RESET
2/. break, and review disassembly, PC value... via JTAG to see if the break code is in a/. bootrom OR b/. SPL or u-boot
3/. check your board etc.. if 2a/ or debug SPL/u-boot if 2b/.
Best,
-Hong

0 ROSHAN RAJAGOPAL 4 months ago in reply to Hong Guan64

Intellectual 315 points

Hi Hong ,
I was not clear on this part quoted below, Could you help me out.

Hong Guan64 said:
1/. "attach" JTAG to your board, where "attach" is non-intrusive to the running board or NO HW RESET
2/. break, and review disassembly, PC value... via JTAG to see if the break code is in a/. bootrom OR b/. SPL or u-boot
3/. check your board etc.. if 2a/ or debug SPL/u-boot if 2b/.

Regards,
Roshan Rajagopal

0 Hong Guan64 3 months ago in reply to ROSHAN RAJAGOPAL

TI__Guru 72070 points

I use Lauterbach T32 JTAG debugger, and attaching SPL boot flow with T32 for your reference.
The below is what I used to attach T32 debugger to the running AM43xx board.
"SYStem.CPU AM43xx
SYStem.Mode Attach"

The following e2e is one CCS usege reference.
RE: CODECOMPOSER: How to attach to a running program
Feel free to post your questions on how to use CCS in E2E CCS forum

Best,
-Hong

1440.spl_boot_flow_v1.pdf

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AM4378: Booting Issue