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Could you share to me the method how to boot a uboot at EL1 mode not EL2 mode ?

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Could you share to me the method how to boot a uboot at EL1 mode not EL2 mode ?

‎12-06-2023 05:43 PM
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dongjoo99kim
Contributor I

Dear all.

 

I have developed imx8mq including cortex a53, gicv3 controller.

 

As i know, uboot can boot at EL2 mode by bl31 bootloader.

If my understand is not correct, Please. correct me.

 

I have a problem to enable gicv3 interrupt init, interrupt trigger, interrupt handler at uboot ( EL2 mode ) 

So, I try to change a uboot from EL2 mode to EL1 mode as like kernel using bl31 bootloader.

 

After changing the uboot to EL1 mode as like kernel using bl31 bootloader,

I want to enable gicv3 interrupt init, interrupt trigger, interrupt handler at uboot ( EL1 mode ).

 

If my idea have a problem,

Please, correct me.

 

And, Please share to me the method how to change uboot to EL1 mode by bl31 bootloader.

 

Thanks.

 

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