+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
+ dma_addr_t dma_handle;
+#endif
+
+ /* 2M as memory block */
+ num_block = rsv_size / SIZE_PER_BLOCK;
+
+ rsv_mm_info = vmalloc(sizeof(struct memblock_info) * num_block);
+ if (!rsv_mm_info) {
+ XEN_ERR("Unable to allocate device memory information\n");
+ return -ENOMEM;
+ }
+ memset(rsv_mm_info, 0, sizeof(struct memblock_info) * num_block);
+
+ /* try alloc size of 4M once */
+ for (i = 0; i < num_block; i += 2) {
+ vstart = (unsigned long)
+ __get_free_pages(GFP_ATOMIC, MAX_NUM_ORDER);
+ if (vstart == 0)
+ break;
+
+ dom0_dev.num_bigblock = i / 2 + 1;
+ allocated_size = SIZE_PER_BLOCK * (i + 2);
+
+ /* size of 4M */
+ size = DOM0_MEMBLOCK_SIZE * 2;
+
+ vaddr = vstart;
+ while (size > 0) {
+ SetPageReserved(virt_to_page(vaddr));
+ vaddr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+
+ pfn = virt_to_pfn(vstart);
+ rsv_mm_info[i].pfn = pfn;
+ rsv_mm_info[i].vir_addr = vstart;
+ rsv_mm_info[i + 1].pfn =
+ pfn + DOM0_MEMBLOCK_SIZE / PAGE_SIZE;
+ rsv_mm_info[i + 1].vir_addr =
+ vstart + DOM0_MEMBLOCK_SIZE;
+ }
+
+ /*if it failed to alloc 4M, and continue to alloc 2M once */
+ for (; i < num_block; i++) {