How to disable GIC-500 242?

[Jeff-CF-Huang]

Hi Sir,

We want to turn off GIC-500 242 on Linux kernel to avoid competing with M-core for EIRQ.

Could you guide us on how to achieve this, such as through DTS or other configurations?

Best regards,
Jeff Huang

[Joey_z]

hi，Jeff-CF-Huang

Thank you for contacting us.

Could you share more information to us?

Which version of BSP are you using? And are you using the RDB2 or RDB3?

BR

Joey

[Jeff-CF-Huang]

Hi Joey,

We are currently using BSP 40 with kernel 5.15 (RDB3), but plan to migrate to BSP 44 with kernel 6.6.

Best regards,
Jeff Huang

[Joey_z]

hi,Jeff-CF-Huang

Thank you for your reply.

Check the interrupts information, The 242 interrupt is used to gpio.

You can try to modify the file of (ATF/fdts/s32g.dtsi), it has the define for gpio in this file.

Hope it can help you.

BR

Joey

[Jeff-CF-Huang]

Hi Joey,

Thank you for your reply.
Could you guide us on how to keep this IRQ on the A53 cores without routing it to the M7 cores?

Best regards,
Jeff Huang

[Joey_z · Accepted solution]

hi,Jeff-CF-Huang

Thank you for your reply.

If you do not check the interrupt of SIUL1_ORED_IRQn, you are not enable the interrupt in M core.

Hope it can help you.

BR

Joey