1extern int iommu_is_span_boundary(unsigned int index, unsigned int nr, 2 unsigned long shift, 3 unsigned long boundary_size); 4extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size, 5 unsigned long start, unsigned int nr, 6 unsigned long shift, 7 unsigned long boundary_size, 8 unsigned long align_mask); 9extern void iommu_area_free(unsigned long *map, unsigned long start, 10 unsigned int nr); 11