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author | Peter Pearse <peter.pearse@arm.com> | 2007-04-19 13:17:20 +0100 |
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committer | Peter Pearse <peter.pearse@arm.com> | 2007-04-19 13:17:20 +0100 |
commit | ee89bf2782406b1f87088b4764aeb6f811d82526 (patch) | |
tree | b144476f4b5e92a414efff165d214d34062d4365 /libfdt/fdt.c | |
parent | 9c00dfb0bf89c8c23e8af5b5bdf49cf66d769f85 (diff) | |
parent | 37837828d89084879bee2f2b8c7c68d4695940df (diff) | |
download | u-boot-imx-ee89bf2782406b1f87088b4764aeb6f811d82526.zip u-boot-imx-ee89bf2782406b1f87088b4764aeb6f811d82526.tar.gz u-boot-imx-ee89bf2782406b1f87088b4764aeb6f811d82526.tar.bz2 |
Merge with git://www.denx.de/git/u-boot.git
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; +} |