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diff --git a/qemu/dtc/tests/trees.S b/qemu/dtc/tests/trees.S
new file mode 100644
index 000000000..cae018760
--- /dev/null
+++ b/qemu/dtc/tests/trees.S
@@ -0,0 +1,201 @@
+#include <fdt.h>
+#include "testdata.h"
+
+#define FDTLONG(val) \
+	.byte	((val) >> 24) & 0xff ; \
+	.byte	((val) >> 16) & 0xff ; \
+	.byte	((val) >> 8) & 0xff ; \
+	.byte	(val) & 0xff	;
+
+#define FDTQUAD(val) \
+	.byte	((val) >> 56) & 0xff ; \
+	.byte	((val) >> 48) & 0xff ; \
+	.byte	((val) >> 40) & 0xff ; \
+	.byte	((val) >> 32) & 0xff ; \
+	.byte	((val) >> 24) & 0xff ; \
+	.byte	((val) >> 16) & 0xff ; \
+	.byte	((val) >> 8) & 0xff ; \
+	.byte	(val) & 0xff	;
+
+#define TREE_HDR(tree) \
+	.balign	8		; \
+	.globl	_##tree		; \
+_##tree:	\
+tree:	\
+	FDTLONG(FDT_MAGIC)	; \
+	FDTLONG(tree##_end - tree) ; \
+	FDTLONG(tree##_struct - tree) ; \
+	FDTLONG(tree##_strings - tree) ; \
+	FDTLONG(tree##_rsvmap - tree) ; \
+	FDTLONG(0x11)		; \
+	FDTLONG(0x10)		; \
+	FDTLONG(0)		; \
+	FDTLONG(tree##_strings_end - tree##_strings) ; \
+	FDTLONG(tree##_struct_end - tree##_struct) ;
+
+#define RSVMAP_ENTRY(addr, len) \
+	FDTQUAD(addr)		; \
+	FDTQUAD(len)		; \
+
+#define EMPTY_RSVMAP(tree) \
+	.balign	8		; \
+tree##_rsvmap:			; \
+	RSVMAP_ENTRY(0, 0) \
+tree##_rsvmap_end:		;
+
+#define PROPHDR(tree, name, len) \
+	FDTLONG(FDT_PROP)	; \
+	FDTLONG(len)		; \
+	FDTLONG(tree##_##name - tree##_strings) ;
+
+#define PROP_INT(tree, name, val) \
+	PROPHDR(tree, name, 4) \
+	FDTLONG(val)		;
+
+#define PROP_INT64(tree, name, val) \
+	PROPHDR(tree, name, 8) \
+	FDTQUAD(val)		;
+
+#define PROP_STR(tree, name, str) \
+	PROPHDR(tree, name, 55f - 54f) \
+54:	\
+	.string	str		; \
+55:	\
+	.balign	4		;
+
+#define BEGIN_NODE(name) \
+	FDTLONG(FDT_BEGIN_NODE)	; \
+	.string	name		; \
+	.balign 4		;
+
+#define END_NODE \
+	FDTLONG(FDT_END_NODE)	;
+
+#define STRING(tree, name, str) \
+tree##_##name:			; \
+	.string	str		;
+
+	.data
+
+	TREE_HDR(test_tree1)
+
+	.balign	8
+test_tree1_rsvmap:
+	RSVMAP_ENTRY(TEST_ADDR_1, TEST_SIZE_1)
+	RSVMAP_ENTRY(TEST_ADDR_2, TEST_SIZE_2)
+	RSVMAP_ENTRY(0, 0)
+test_tree1_rsvmap_end:
+
+test_tree1_struct:
+	BEGIN_NODE("")
+	PROP_STR(test_tree1, compatible, "test_tree1")
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_1)
+	PROP_INT64(test_tree1, prop_int64, TEST_VALUE64_1)
+	PROP_STR(test_tree1, prop_str, TEST_STRING_1)
+
+	BEGIN_NODE("subnode@1")
+	PROP_STR(test_tree1, compatible, "subnode1")
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_1)
+
+	BEGIN_NODE("subsubnode")
+	PROP_STR(test_tree1, compatible, "subsubnode1\0subsubnode")
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_1)
+	END_NODE
+
+	BEGIN_NODE("ss1")
+	END_NODE
+
+	END_NODE
+
+	BEGIN_NODE("subnode@2")
+	PROP_INT(test_tree1, linux_phandle, PHANDLE_1)
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_2)
+
+	BEGIN_NODE("subsubnode@0")
+	PROP_INT(test_tree1, phandle, PHANDLE_2)
+	PROP_STR(test_tree1, compatible, "subsubnode2\0subsubnode")
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_2)
+	END_NODE
+
+	BEGIN_NODE("ss2")
+	END_NODE
+
+	END_NODE
+
+	END_NODE
+	FDTLONG(FDT_END)
+test_tree1_struct_end:
+
+test_tree1_strings:
+	STRING(test_tree1, compatible, "compatible")
+	STRING(test_tree1, prop_int, "prop-int")
+	STRING(test_tree1, prop_int64, "prop-int64")
+	STRING(test_tree1, prop_str, "prop-str")
+	STRING(test_tree1, linux_phandle, "linux,phandle")
+	STRING(test_tree1, phandle, "phandle")
+test_tree1_strings_end:
+test_tree1_end:
+
+
+	TREE_HDR(truncated_property)
+	EMPTY_RSVMAP(truncated_property)
+
+truncated_property_struct:
+	BEGIN_NODE("")
+	PROPHDR(truncated_property, prop_truncated, 4)
+	/* Oops, no actual property data here */
+truncated_property_struct_end:
+
+truncated_property_strings:
+	STRING(truncated_property, prop_truncated, "truncated")
+truncated_property_strings_end:
+
+truncated_property_end:
+
+
+	TREE_HDR(bad_node_char)
+	EMPTY_RSVMAP(bad_node_char)
+
+bad_node_char_struct:
+	BEGIN_NODE("")
+	BEGIN_NODE("sub$node")
+	END_NODE
+	END_NODE
+	FDTLONG(FDT_END)
+bad_node_char_struct_end:
+
+bad_node_char_strings:
+bad_node_char_strings_end:
+bad_node_char_end:
+
+
+	TREE_HDR(bad_node_format)
+	EMPTY_RSVMAP(bad_node_format)
+
+bad_node_format_struct:
+	BEGIN_NODE("")
+	BEGIN_NODE("subnode@1@2")
+	END_NODE
+	END_NODE
+	FDTLONG(FDT_END)
+bad_node_format_struct_end:
+
+bad_node_format_strings:
+bad_node_format_strings_end:
+bad_node_format_end:
+
+
+	TREE_HDR(bad_prop_char)
+	EMPTY_RSVMAP(bad_prop_char)
+
+bad_prop_char_struct:
+	BEGIN_NODE("")
+	PROP_INT(bad_prop_char, prop, TEST_VALUE_1)
+	END_NODE
+	FDTLONG(FDT_END)
+bad_prop_char_struct_end:
+
+bad_prop_char_strings:
+	STRING(bad_prop_char, prop, "prop$erty")
+bad_prop_char_strings_end:
+bad_prop_char_end: