topic Re: IMX6 dek_blob values in i.MX Processors

IMX6 dek_blob values

omar_aberkan — Sun, 13 Jan 2019 12:10:30 GMT

Where did the DEK address (0x10800000) and Output Address (0x10801000) came from?

I saw many examples but nobody explained where these values came from.

dek_blob <DEK address> <Output Address> <Key Size in Bits>

example: dek_blob 0x10800000 0x10801000 192

After i load the dek.bin into memory and execute the dek_blob command i get the following error:
Allocation of page 0 in partition 1 failed 0x1

I hope somebody can help me out please.

Re: IMX6 dek_blob values

Yuri — Tue, 15 Jan 2019 08:18:46 GMT

Hello,

Try to disable caches in U-boot.

Also app note "Encrypted Boot on HABv4 and CAAM Enabled Devices" may be useful.

https://www.nxp.com/docs/en/application-note/AN12056.pdf

Have a great day,

Yuri

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Re: IMX6 dek_blob values

omar_aberkan — Tue, 15 Jan 2019 10:54:21 GMT

Still no success. I am using the imx6ul and the device is closed.

Re: IMX6 dek_blob values

Yuri — Wed, 16 Jan 2019 07:34:47 GMT

Hello,

Free system memory area should be used in the dec_blob command.

According to Table 2-1 (System memory map) of i.MX 6UltraLite Reference Manual,

Rev. 1, 04/2016, memory starts from address 0x8000_0000 (till 0xFFFF_FFFF).

Regards,

Yuri.

Re: IMX6 dek_blob values

omar_aberkan — Wed, 16 Jan 2019 20:58:14 GMT

Upgrading u-boot to v2018.09 fixed all my caam issues.