i.MX6ULL u-boot data abort

[Arnau]

Hi, i'm  trying to update u-boot to the latest BSP (2023.04) on a i.MX6ULL custom board that is at 2016.03. As that old version doesn't have a dtsi, I copied it from our Linux Kernel source.

Currently it crashes like so:

U-Boot 2023.04 (Dec 28 2023 - 14:20:16 +0000)

CPU:   i.MX6ULL rev1.1 900 MHz (running at 396 MHz)
CPU:   Commercial temperature grade (0C to 95C) at 32C
Reset cause: WDOG
Model: X T080 for Y
Board: T080 for Y
DRAM:  512 MiB
Core:  75 devices, 17 uclasses, devicetree: separate
MMC:   FSL_SDHC: 0
Loading Environment from MMC... MMC Device 1 not found
*** Warning - No MMC card found, using default environment

Fail to setup video link
In:    serial
Out:   serial
Err:   serial
data abort
pc : [<9ffb38f6>]	  lr : [<9ffc4489>]
reloc pc : [<878228f6>]	  lr : [<87833489>]
sp : 9ef86588  ip : 9ef86574	fp : 87800020
r10: 00000017  r9 : 9ef8eeb0	r8 : 00000100
r7 : 021bc400  r6 : 9ffd0825	r5 : 00000000  r4 : 9ef91ab0
r3 : ffffffff  r2 : 02140000	r1 : 00007f50  r0 : ffffffff
Flags: NzCv  IRQs off  FIQs off  Mode SVC_32 (T)
Code: 1e03 9300 da0e 6822 (6853) b125 
Resetting CPU ...

resetting ...

Any help or guidance would be appreciated.

[Harvey021]

Hi 

Can you share what you have copied to new BSP?

Regards

Harvey

[Arnau]

Hi, I actually solved the data abort by disabling HAB by removing FSL_CAAM and FSL_BLOB like this in arch/arm/mach-imx/mx6/Kconfig:

config TARGET_Y_T080
	bool "y_t080"
	depends on MX6UL
	select BOARD_LATE_INIT
	select DM
	select DM_THERMAL
	select SUPPORT_SPL
	select IMX_MODULE_FUSE
	select OF_SYSTEM_SETUP
	imply CMD_DM
-	select FSL_CAAM
-	select FSL_BLOB
	select ARCH_MISC_INIT

The board boots fine now, but if I enable CONFIG_CMD_BMP it hangs with no error in the serial output like so: 

U-Boot 2023.04 (Jan 03 2024 - 11:48:22 +0000)

CPU:   i.MX6ULL rev1.1 900 MHz (running at 396 MHz)
CPU:   Commercial temperature grade (0C to 95C) at 31C
Reset cause: POR
Model: X T080 for Y
Board: T080 for Y
DRAM:  512 MiB
Core:  76 devices, 18 uclasses, devicetree: separate
NAND:  512 MiB
MMC:   FSL_SDHC: 0
Loading Environment from MMC... MMC Device 1 not found
*** Warning - No MMC card found, using default environment

Loading Environment from NAND... *** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial

Our board has a 24 bit parallel LCD, which in uboot 2016.03 works fine but is initialized without a DT and can show a splash logo.

Thanks

[Arnau]

It seems the problem is related to HAB, because after doing an objdump of the reloc pc, the function which crashes in the file "drivers/crypto/fsl/jr.c" is:

int sec_init_idx(uint8_t sec_idx)

 I don't really know what SEC is but our board isn't configured for it, how can I disable it?