A6.2.4 Data cache maintenance considerations

If the data is dirty, a clean is performed before the invalidate.

DCISW and DCCSW operations in AArch32 and DC ISW and DC CSW 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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