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authorMichal Simek <monstr@monstr.eu>2007-05-08 00:32:35 +0200
committerMichal Simek <monstr@monstr.eu>2007-05-08 00:32:35 +0200
commit3c4bd60de15d79ddfc0cf3170a55847b2025d93f (patch)
tree891b84b58f13a5f45536a243585b9d94c253a410 /libfdt/fdt.c
parentfb05f6da35ea1c15c553abe6f23f656bf18dc5db (diff)
parentac4cd59d59c9bf3f89cb7a344abf8184d678f562 (diff)
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Merge git://www.denx.de/git/u-boot
Conflicts: include/asm-microblaze/microblaze_intc.h include/linux/stat.h
Diffstat (limited to 'libfdt/fdt.c')
-rw-r--r--libfdt/fdt.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/libfdt/fdt.c b/libfdt/fdt.c
new file mode 100644
index 0000000..212b838
--- /dev/null
+++ b/libfdt/fdt.c
@@ -0,0 +1,85 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "libfdt_env.h"
+
+#include <fdt.h>
+#include <libfdt.h>
+
+#include "libfdt_internal.h"
+
+int fdt_check_header(const void *fdt)
+{
+ if (fdt_magic(fdt) == FDT_MAGIC) {
+ /* Complete tree */
+ if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
+ return -FDT_ERR_BADVERSION;
+ if (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION)
+ return -FDT_ERR_BADVERSION;
+ } else if (fdt_magic(fdt) == SW_MAGIC) {
+ /* Unfinished sequential-write blob */
+ if (fdt_size_dt_struct(fdt) == 0)
+ return -FDT_ERR_BADSTATE;
+ } else {
+ return -FDT_ERR_BADMAGIC;
+ }
+
+ return 0;
+}
+
+void *fdt_offset_ptr(const void *fdt, int offset, int len)
+{
+ void *p;
+
+ if (fdt_version(fdt) >= 0x11)
+ if (((offset + len) < offset)
+ || ((offset + len) > fdt_size_dt_struct(fdt)))
+ return NULL;
+
+ p = _fdt_offset_ptr(fdt, offset);
+
+ if (p + len < p)
+ return NULL;
+ return p;
+}
+
+const char *_fdt_find_string(const char *strtab, int tabsize, const char *s)
+{
+ int len = strlen(s) + 1;
+ const char *last = strtab + tabsize - len;
+ const char *p;
+
+ for (p = strtab; p <= last; p++)
+ if (memeq(p, s, len))
+ return p;
+ return NULL;
+}
+
+int fdt_move(const void *fdt, void *buf, int bufsize)
+{
+ int err = fdt_check_header(fdt);
+
+ if (err)
+ return err;
+
+ if (fdt_totalsize(fdt) > bufsize)
+ return -FDT_ERR_NOSPACE;
+
+ memmove(buf, fdt, fdt_totalsize(fdt));
+ return 0;
+}