70 static char *xen_io_tlb_start, *xen_io_tlb_end;  variable
150 		return paddr >= virt_to_phys(xen_io_tlb_start) &&  in is_xen_swiotlb_buffer()
232 		xen_io_tlb_start = alloc_bootmem_pages(PAGE_ALIGN(bytes));  in xen_swiotlb_init()
237 			xen_io_tlb_start = (void *)xen_get_swiotlb_free_pages(order);  in xen_swiotlb_init()
238 			if (xen_io_tlb_start)  in xen_swiotlb_init()
249 	if (!xen_io_tlb_start) {  in xen_swiotlb_init()
253 	xen_io_tlb_end = xen_io_tlb_start + bytes;  in xen_swiotlb_init()
257 	rc = xen_swiotlb_fixup(xen_io_tlb_start,  in xen_swiotlb_init()
262 			free_bootmem(__pa(xen_io_tlb_start), PAGE_ALIGN(bytes));  in xen_swiotlb_init()
264 			free_pages((unsigned long)xen_io_tlb_start, order);  in xen_swiotlb_init()
265 			xen_io_tlb_start = NULL;  in xen_swiotlb_init()
270 	start_dma_addr = xen_virt_to_bus(xen_io_tlb_start);  in xen_swiotlb_init()
272 		if (swiotlb_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs,  in xen_swiotlb_init()
277 		rc = swiotlb_late_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs);  in xen_swiotlb_init()
291 		free_pages((unsigned long)xen_io_tlb_start, order);  in xen_swiotlb_init()