topic i.MX6ULL u-boot data abort in i.MX Processors

i.MX6ULL u-boot data abort

Arnau — Sat, 30 Dec 2023 13:48:41 GMT

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.

Re: i.MX6ULL u-boot data abort

Arnau — Sat, 30 Dec 2023 13:47:39 GMT

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?

Re: i.MX6ULL u-boot data abort

Harvey021 — Wed, 03 Jan 2024 02:41:20 GMT

Can you share what you have copied to new BSP?

Regards

Harvey

Re: i.MX6ULL u-boot data abort

Arnau — Thu, 04 Jan 2024 12:19:42 GMT

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