libfdt - library for manipulating device trees in flattened format

Initial revision, read-only and "in-place" (no memmove() required)
write operations only.

tests/trees.S

@@ -0,0 +1,84 @@
+#include <fdt.h>
+#include "testdata.h"
+
+#define TREE_HDR(tree) \
+	.globl	_##tree		; \
+_##tree:	\
+tree:	\
+	.long	FDT_MAGIC	; \
+	.long	tree##_end - tree ; \
+	.long	tree##_struct - tree ; \
+	.long	tree##_strings - tree ; \
+	.long	tree##_rsvmap - tree ; \
+	.long	0x10		; \
+	.long	0x10		; \
+	.long	0		; \
+	.long	tree##_end - tree##_strings ;
+
+#define RSVMAP_ENTRY(addr, len) \
+	.quad	addr		; \
+	.quad	len		;
+
+#define PROPHDR(tree, name, len) \
+	.long	FDT_PROP	; \
+	.long	tree##_##name - tree##_strings ; \
+	.long	len		;
+
+#define PROP_INT(tree, name, val) \
+	PROPHDR(tree, name, 4) \
+	.long	val
+
+#define PROP_STR(tree, name, str) \
+	PROPHDR(tree, name, 55f - 54f) \
+54:	\
+	.string	str		; \
+55:	\
+	.balign	4
+
+#define BEGIN_NODE(name) \
+	.long	FDT_BEGIN_NODE	; \
+	.string	name		; \
+	.balign 4
+
+#define END_NODE \
+	.long	FDT_END_NODE	;
+
+#define STRING(tree, name, str) \
+tree##_##name:	\
+	.string	str
+	
+	.data
+
+	TREE_HDR(test_tree1)
+
+test_tree1_rsvmap:
+	RSVMAP_ENTRY(0, 0)
+
+test_tree1_struct:
+	BEGIN_NODE("")
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_1)
+	PROP_STR(test_tree1, prop_str, TEST_STRING_1)
+	
+	BEGIN_NODE("subnode1")
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_1)
+
+	BEGIN_NODE("subsubnode")
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_1)
+	END_NODE
+	END_NODE
+
+	BEGIN_NODE("subnode2")
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_2)
+
+	BEGIN_NODE("subsubnode")
+	PROP_INT(test_tree1, prop_int, TEST_VALUE_2)
+	END_NODE
+	END_NODE
+
+	END_NODE
+	.long	FDT_END
+
+test_tree1_strings:
+	STRING(test_tree1, prop_int, "prop-int")
+	STRING(test_tree1, prop_str, "prop-str")
+test_tree1_end: