IOBMAP_PAGE_SHIFT
bus_addr = (tbl->it_offset + index) << IOBMAP_PAGE_SHIFT;
iommu_table_iobmap.it_page_shift = IOBMAP_PAGE_SHIFT;
iob_l2_emptyval = IOBMAP_L2E_V | (tmp >> IOBMAP_PAGE_SHIFT);
#define IOBMAP_PAGE_SIZE (1 << IOBMAP_PAGE_SHIFT)
bus_addr = (tbl->it_offset + index) << IOBMAP_PAGE_SHIFT;
rpn = __pa(uaddr) >> IOBMAP_PAGE_SHIFT;