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Data cache maintenance considerations

DCIMVAC operations in AArch32 and DC IVAC instructions in AArch64 perform an invalidate of the target address. If the data is dirty within the cluster then a clean is performed before the invalidate.

DCISW operations in AArch32 and DC ISW instructions in AArch64 perform both a clean and invalidate of the target set/way. The values of HCR.SWIO and HCR_EL2.SWIO have no effect.

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