i.MX8MQ boot cores

strawberryhacker — Mon, 18 Jan 2021 12:26:34 GMT

Hello,

I am trying to enable the secondary cores on i.MXMQ (only Cortex-A53). I don't use Linux, but I use u-boot for flashing a bare metal code.

I have followed the procedure here

https://source.codeaurora.org/external/imx/imx-atf/tree/plat/imx/imx8m/gpc_common.c?h=imx_5.4.70_2.3.0

I therefore call:

void imx_set_cpu_secure_entry(unsigned int core_id, uintptr_t sec_entrypoint)

then:

void imx_set_cpu_pwr_on(unsigned int core_id)

then:

asm ("sev")

I use the entry point: 0x40000400 where my secondary boot functions is.

This powers up core 2, and my debugger shows that core 2 bounces between address 0x200 and 0xA7F8. I suspect this is the ROM code, in the WFE state, waiting for a start address.

Can anyone please tell me the reason I can't bring up the cores?
Is these the only steps required in order to boot secondary cores?

I really appreciate any answers!

Kind regards,

Bjørn

Re: i.MX8MQ boot cores

strawberryhacker — Tue, 19 Jan 2021 06:09:04 GMT

No need to answer - I am switching to a different vendor.

topic i.MX8MQ boot cores in i.MX Processors

i.MX8MQ boot cores

Re: i.MX8MQ boot cores