When GIC is inherent part of ARM processor then why INTC is used

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When GIC is inherent part of ARM processor then why INTC is used

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adityanagal
Contributor III

Hi ,

When the GIC is inherent part of the ARM processor then why INTC is used . As per my understanding , it is used with the GPC module ( General Power Controller) .

But why it is required with GPC when all the interrupts are being served by GIC itself ? Please suggest.

Regards,

Aditya Nagal

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Aditya

in some low power modes arm complex (core, gic) is powered off as described in

Table 21-1. Low Power Modes Linux Manual from Linux documentation on below link.

So gic is not able to process interrupts. GPC is used for that purpose to wake processor.

https://www.nxp.com/webapp/Download?colCode=L4.1.15_2.0.0-LINUX-DOCS&Parent_nodeId=13376994810717061... 

Best regards
igor
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