IMMU_PAGEOFFSET
dma_out->dmao_obj.dvma_obj.dv_off = offset & IMMU_PAGEOFFSET;
addr & IMMU_PAGEOFFSET) {
#define IMMU_PAGEMASK (~IMMU_PAGEOFFSET)
#define IMMU_BTOPR(x) ((((x) + IMMU_PAGEOFFSET) >> IMMU_PAGESHIFT))
#define IMMU_ROUNDUP(size) (((size) + IMMU_PAGEOFFSET) & ~IMMU_PAGEOFFSET)
#define IMMU_ROUNDOWN(addr) ((addr) & ~IMMU_PAGEOFFSET)