topic About SECO in i.MX Processors

About SECO

dlliweihua — Sun, 08 Nov 2020 10:53:17 GMT

Dear NXP community,

I want to know what state SECO enters after boot stage?

Can I use the authentication hardware of SECO to verify my images(such as images for upgrade purpose) while the OS(linux, qnx and so on)running?

Thanks in advance.

liweihua

Re: About SECO

Yuri — Mon, 09 Nov 2020 08:00:24 GMT

@dlliweihua
Hello,

SECO ROM provides initialization and SECO FW check,
further activity is performed by SECO FW, usually in loop.
You may look at Figure 2 (Secure boot flow overview) of
"Secure Boot on i.MX 8 and i.MX 8X Families using AHAB"
app note.
Also use section 4.4 [Authenticating OS containers (and
other ones)].

https://www.nxp.com/docs/en/application-note/AN12312.pdf

Regards,
Yuri.

Re: About SECO

dlliweihua — Mon, 09 Nov 2020 10:31:44 GMT

@Yuri

OK, I'll check it.

Thanks a lot!

Regards,

liweihua