ext lib: add libfdt to enable flattened device tree support

this patch adds libfdt, a library necessary for supporting
flattened device tree support in current and future versions of
the linux/android kernel for ARM.

1 files changed, 76 insertions, 0 deletions

diff --git a/ext/libfdt/libfdt_internal.h b/ext/libfdt/libfdt_internal.h
new file mode 100644
index 000000000..9bccc154f
--- /dev/null
+++ b/ext/libfdt/libfdt_internal.h
@@ -0,0 +1,76 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *     1. Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *     2. Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef _LIBFDT_INTERNAL_H
+#define _LIBFDT_INTERNAL_H
+
+#include <fdt.h>
+
+#define FDT_ALIGN(x, a)		(((x) + (a) - 1) & ~((a) - 1))
+#define FDT_TAGALIGN(x)		(FDT_ALIGN((x), FDT_TAGSIZE))
+
+#define FDT_CHECK_HEADER(fdt) \
+        { \
+                int err; \
+                if ((err = fdt_check_header(fdt)) != 0) \
+                        return err; \
+        }
+
+int _fdt_check_node_offset(const void *fdt, int offset);
+int _fdt_check_prop_offset(const void *fdt, int offset);
+const char *_fdt_find_string(const char *strtab, int tabsize, const char *s);
+int _fdt_node_end_offset(void *fdt, int nodeoffset);
+
+static inline const void *_fdt_offset_ptr(const void *fdt, int offset)
+{
+        return (const char *)fdt + fdt_off_dt_struct(fdt) + offset;
+}
+
+static inline void *_fdt_offset_ptr_w(void *fdt, int offset)
+{
+        return (void *)(uintptr_t)_fdt_offset_ptr(fdt, offset);
+}
+
+static inline const struct fdt_reserve_entry *_fdt_mem_rsv(const void *fdt, int n)
+{
+        const struct fdt_reserve_entry *rsv_table =
+                (const struct fdt_reserve_entry *)
+                ((const char *)fdt + fdt_off_mem_rsvmap(fdt));
+
+        return rsv_table + n;
+}
+static inline struct fdt_reserve_entry *_fdt_mem_rsv_w(void *fdt, int n)
+{
+        return (void *)(uintptr_t)_fdt_mem_rsv(fdt, n);
+}
+
+#define FDT_SW_MAGIC		(~FDT_MAGIC)
+
+#endif /* _LIBFDT_INTERNAL_H */