+#ifdef CONFIG_XEN_DOM0
+static int
+igbuio_dom0_mmap_phys(struct uio_info *info, struct vm_area_struct *vma)
+{
+ int idx;
+ idx = (int)vma->vm_pgoff;
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ vma->vm_page_prot.pgprot |= _PAGE_IOMAP;
+
+ return remap_pfn_range(vma,
+ vma->vm_start,
+ info->mem[idx].addr >> PAGE_SHIFT,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot);
+}
+
+/**
+ * This is uio device mmap method which will use igbuio mmap for Xen
+ * Dom0 environment.
+ */
+static int
+igbuio_dom0_pci_mmap(struct uio_info *info, struct vm_area_struct *vma)
+{
+ int idx;
+
+ if (vma->vm_pgoff >= MAX_UIO_MAPS)
+ return -EINVAL;
+ if(info->mem[vma->vm_pgoff].size == 0)
+ return -EINVAL;
+
+ idx = (int)vma->vm_pgoff;
+ switch (info->mem[idx].memtype) {
+ case UIO_MEM_PHYS:
+ return igbuio_dom0_mmap_phys(info, vma);
+ case UIO_MEM_LOGICAL:
+ case UIO_MEM_VIRTUAL:
+ default:
+ return -EINVAL;
+ }
+}
+#endif
+