mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-25 21:24:21 +08:00
6679f92995
Changed _fdt_check_header() to fdt_check_header() and made it part of the interface - it is a useful routine. Also did some asthetics cleanup to the include files (headers).
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
/*
|
|
* 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;
|
|
}
|