AMD_IOMMU_PGTABLE_HASH_SZ
AMD_IOMMU_PGTABLE_HASH_SZ, KM_SLEEP);
sizeof (amd_iommu_page_table_t *) * AMD_IOMMU_PGTABLE_HASH_SZ);
return (pa_4K % AMD_IOMMU_PGTABLE_HASH_SZ);