i.MX8 boot secondary cores

[strawberryhacker]

Hello,

I have problems booting the secondary cores using i.MX8MQ. I have installed u-boot which download my bare-metal code over network. This works. Then I have:

• enabled power to the A53 cores in the GPC
• written the SRC_GPR registers that contains the persistent start address with my entry point
• enabled the cores in the SRC_A53RCR1 registers

However, the cores don't start. Can anyone please tell me if this is the right way? Or I am missing some steps?

Kind regards,

Bjørn

[igorpadykov · Accepted solution]

Hi Bjørn

in NXP Linux standard BSP, only A53_0 is firstly started, when Linux is started the other cores
are started using PSCI commands. First core which is started for A domain should be A53_0 or A72_0 and
after the other cores can be started. I am afraid order of booting can not be modified.
https://source.codeaurora.org/external/imx/imx-atf/tree/plat/imx/imx8qm/imx8qm_psci.c?h=imx_5.4.70_2...

Best regards
igor

[strawberryhacker]

Thank you for the answer. This brought me in the right direction!

Kind regards,

Bjørn