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GICD_NSACR in GIC600 non-existing registers

MHesham

Hi All,

It is mentioned in the GICv3 Architecture(IHI0069G) document that when Affinity Routing is Enabled both GICD_NSACR0 and GICD_NSACR1 can be considered res0 or RAZ/WI. As GICR_NSACR will be responsible of the SGIs and the rest of GICD_NSACR2 .. are responsible of the SPIs

On the same note in the GIC600 Technical Reference Manual(r1p6) It mentions that the first 4 registers of GICD_NSACR will not exist.

Can anyone please explain the reason why GICD_NSACR2-3 won't exist. And how would the permissions be controlled for the SPIs 32-63 in that case.

Thank,

Mohamed