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diff --git a/qemu/include/sysemu/device_tree.h b/qemu/include/sysemu/device_tree.h
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+++ b/qemu/include/sysemu/device_tree.h
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+/*
+ * Header with function prototypes to help device tree manipulation using
+ * libfdt. It also provides functions to read entries from device tree proc
+ * interface.
+ *
+ * Copyright 2008 IBM Corporation.
+ * Authors: Jerone Young <jyoung5@us.ibm.com>
+ *          Hollis Blanchard <hollisb@us.ibm.com>
+ *
+ * This work is licensed under the GNU GPL license version 2 or later.
+ *
+ */
+
+#ifndef __DEVICE_TREE_H__
+#define __DEVICE_TREE_H__
+
+void *create_device_tree(int *sizep);
+void *load_device_tree(const char *filename_path, int *sizep);
+
+int qemu_fdt_setprop(void *fdt, const char *node_path,
+                     const char *property, const void *val, int size);
+int qemu_fdt_setprop_cell(void *fdt, const char *node_path,
+                          const char *property, uint32_t val);
+int qemu_fdt_setprop_u64(void *fdt, const char *node_path,
+                         const char *property, uint64_t val);
+int qemu_fdt_setprop_string(void *fdt, const char *node_path,
+                            const char *property, const char *string);
+int qemu_fdt_setprop_phandle(void *fdt, const char *node_path,
+                             const char *property,
+                             const char *target_node_path);
+const void *qemu_fdt_getprop(void *fdt, const char *node_path,
+                             const char *property, int *lenp);
+uint32_t qemu_fdt_getprop_cell(void *fdt, const char *node_path,
+                               const char *property);
+uint32_t qemu_fdt_get_phandle(void *fdt, const char *path);
+uint32_t qemu_fdt_alloc_phandle(void *fdt);
+int qemu_fdt_nop_node(void *fdt, const char *node_path);
+int qemu_fdt_add_subnode(void *fdt, const char *name);
+
+#define qemu_fdt_setprop_cells(fdt, node_path, property, ...)                 \
+    do {                                                                      \
+        uint32_t qdt_tmp[] = { __VA_ARGS__ };                                 \
+        int i;                                                                \
+                                                                              \
+        for (i = 0; i < ARRAY_SIZE(qdt_tmp); i++) {                           \
+            qdt_tmp[i] = cpu_to_be32(qdt_tmp[i]);                             \
+        }                                                                     \
+        qemu_fdt_setprop(fdt, node_path, property, qdt_tmp,                   \
+                         sizeof(qdt_tmp));                                    \
+    } while (0)
+
+void qemu_fdt_dumpdtb(void *fdt, int size);
+
+/**
+ * qemu_fdt_setprop_sized_cells_from_array:
+ * @fdt: device tree blob
+ * @node_path: node to set property on
+ * @property: property to set
+ * @numvalues: number of values
+ * @values: array of number-of-cells, value pairs
+ *
+ * Set the specified property on the specified node in the device tree
+ * to be an array of cells. The values of the cells are specified via
+ * the values list, which alternates between "number of cells used by
+ * this value" and "value".
+ * number-of-cells must be either 1 or 2 (other values will result in
+ * an error being returned). If a value is too large to fit in the
+ * number of cells specified for it, an error is returned.
+ *
+ * This function is useful because device tree nodes often have cell arrays
+ * which are either lists of addresses or lists of address,size tuples, but
+ * the number of cells used for each element vary depending on the
+ * #address-cells and #size-cells properties of their parent node.
+ * If you know all your cell elements are one cell wide you can use the
+ * simpler qemu_fdt_setprop_cells(). If you're not setting up the
+ * array programmatically, qemu_fdt_setprop_sized_cells may be more
+ * convenient.
+ *
+ * Return value: 0 on success, <0 on error.
+ */
+int qemu_fdt_setprop_sized_cells_from_array(void *fdt,
+                                            const char *node_path,
+                                            const char *property,
+                                            int numvalues,
+                                            uint64_t *values);
+
+/**
+ * qemu_fdt_setprop_sized_cells:
+ * @fdt: device tree blob
+ * @node_path: node to set property on
+ * @property: property to set
+ * @...: list of number-of-cells, value pairs
+ *
+ * Set the specified property on the specified node in the device tree
+ * to be an array of cells. The values of the cells are specified via
+ * the variable arguments, which alternates between "number of cells
+ * used by this value" and "value".
+ *
+ * This is a convenience wrapper for the function
+ * qemu_fdt_setprop_sized_cells_from_array().
+ *
+ * Return value: 0 on success, <0 on error.
+ */
+#define qemu_fdt_setprop_sized_cells(fdt, node_path, property, ...)       \
+    ({                                                                    \
+        uint64_t qdt_tmp[] = { __VA_ARGS__ };                             \
+        qemu_fdt_setprop_sized_cells_from_array(fdt, node_path,           \
+                                                property,                 \
+                                                ARRAY_SIZE(qdt_tmp) / 2,  \
+                                                qdt_tmp);                 \
+    })
+
+#define FDT_PCI_RANGE_RELOCATABLE          0x80000000
+#define FDT_PCI_RANGE_PREFETCHABLE         0x40000000
+#define FDT_PCI_RANGE_ALIASED              0x20000000
+#define FDT_PCI_RANGE_TYPE_MASK            0x03000000
+#define FDT_PCI_RANGE_MMIO_64BIT           0x03000000
+#define FDT_PCI_RANGE_MMIO                 0x02000000
+#define FDT_PCI_RANGE_IOPORT               0x01000000
+#define FDT_PCI_RANGE_CONFIG               0x00000000
+
+#endif /* __DEVICE_TREE_H__ */