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author | Michal Simek <monstr@monstr.eu> | 2007-05-08 00:32:35 +0200 |
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committer | Michal Simek <monstr@monstr.eu> | 2007-05-08 00:32:35 +0200 |
commit | 3c4bd60de15d79ddfc0cf3170a55847b2025d93f (patch) | |
tree | 891b84b58f13a5f45536a243585b9d94c253a410 /libfdt/fdt.c | |
parent | fb05f6da35ea1c15c553abe6f23f656bf18dc5db (diff) | |
parent | ac4cd59d59c9bf3f89cb7a344abf8184d678f562 (diff) | |
download | u-boot-imx-3c4bd60de15d79ddfc0cf3170a55847b2025d93f.zip u-boot-imx-3c4bd60de15d79ddfc0cf3170a55847b2025d93f.tar.gz u-boot-imx-3c4bd60de15d79ddfc0cf3170a55847b2025d93f.tar.bz2 |
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.c | 85 |
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; +} |