SRK endianess in SDK 1.9

[vsiles]

Hi,

I am using NXP SDK 1.9 and am trying to implement secure boot on my ls1021atwr, from SD card (with SPL).

I see that in arch/arm/include/asm/arch-ls102xa/config.h,  CONFIG_SYS_FSL_SRK_LE is defined, but the SRK is stored in the SFP which is Big-Endian.

Could someone explain why is it so ?

Best,

Vincent

[bpe · Accepted solution]

u-Boot is correct. SRK hash fuses are a software-readable, one-time

programmable storage. Regardless of SFP bit numbering, both ISBC and

ESBC read it as an LE value, see the bottom of this page:

https://freescale.sdlproducts.com/LiveContent/content/en-US/QorIQ_SDK/GUID-CD187A17-51FD-46F0-A3F1-1...

Have a great day,
Platon

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