Add parser for 'Flattened Device Tree' which was introduced in

bootloaders such as u-boot, which is generally a simplified memory
dump of an OpenFirmware device tree. Tested on RB600 by me.
This is not used in the code ATM.

ok kettenis@

1 files changed, 59 insertions, 0 deletions

diff --git a/sys/arch/socppc/include/fdt.h b/sys/arch/socppc/include/fdt.h
new file mode 100644
index 00000000000..5d6fb699d4d
--- /dev/null
+++ b/sys/arch/socppc/include/fdt.h
@@ -0,0 +1,59 @@
+
+/*
+ * Copyright (c) 2009 Dariusz Swiderski <sfires@sfires.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+struct fdt_head {
+	u_int32_t fh_magic;
+	u_int32_t fh_size;
+	u_int32_t fh_struct_off;
+	u_int32_t fh_strings_off;
+	u_int32_t fh_reserve_off;
+	u_int32_t fh_version;
+	u_int32_t fh_comp_ver;     /* last compatible version */
+	u_int32_t fh_boot_cpu_id;  /* fh_version >=2 */
+	u_int32_t fh_strings_size; /* fh_version >=3 */
+	u_int32_t fh_struct_size;  /* fh_version >=17 */
+};
+
+struct fdt {
+	struct fdt_head *header;
+	void *		tree;
+	void *		strings;
+	void *		memory;
+	int		version;
+	int		strings_size;
+};
+
+#define FDT_MAGIC	0xd00dfeed
+#define FDT_NODE_BEGIN	0x01
+#define FDT_NODE_END	0x02
+#define FDT_PROPERTY	0x03
+#define FDT_NOP		0x04
+#define FDT_END		0x09
+
+#define FDT_CODE_VERSION 0x11
+
+int	 fdt_init(void *);
+void	*fdt_next_node(void *);
+void	*fdt_child_node(void *);
+char	*fdt_node_name(void *);
+void	*fdt_find_node(char *);
+int	 fdt_node_property(void *, char *, char **);
+#ifdef DEBUG
+void	*fdt_print_property(void *, int);
+void 	 fdt_print_node(void *, int);
+void	 fdt_print_tree(void);
+#endif