sun50i_iommu_zap_ptw_cache
sun50i_iommu_zap_ptw_cache(iommu, iova);
sun50i_iommu_zap_ptw_cache(iommu, iova + SZ_1M);
sun50i_iommu_zap_ptw_cache(iommu, iova + size);
sun50i_iommu_zap_ptw_cache(iommu, iova + size + SZ_1M);