/*
 * libfdt - Flat Device Tree manipulation
 * Copyright (C) 2006 David Gibson, IBM Corporation.
 *
 * libfdt is dual licensed: you can use it either under the terms of
 * the GPL, or the BSD license, at your option.
 *
 *  a) This library is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 *     You should have received a copy of the GNU 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
 *
 * Alternatively,
 *
 *  b) 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.
 */
#include "libfdt_env.h"

#include <fdt.h>
#include <libfdt.h>

#include "libfdt_internal.h"

int
fdt_setprop_inplace (void *fdt, int nodeoffset, const char *name,
		     const void *val, int len)
{
  void *propval;
  int proplen;

  propval = fdt_getprop_w (fdt, nodeoffset, name, &proplen);
  if (!propval)
    return proplen;

  if (proplen != len)
    return -FDT_ERR_NOSPACE;

  memcpy (propval, val, len);
  return 0;
}

static void
_fdt_nop_region (void *start, int len)
{
  uint32_t *p;

  for (p = start; (char *) p < ((char *) start + len); p++)
    *p = cpu_to_fdt32 (FDT_NOP);
}

int
fdt_nop_property (void *fdt, int nodeoffset, const char *name)
{
  struct fdt_property *prop;
  int len;

  prop = fdt_get_property_w (fdt, nodeoffset, name, &len);
  if (!prop)
    return len;

  _fdt_nop_region (prop, len + sizeof (*prop));

  return 0;
}

int
_fdt_node_end_offset (void *fdt, int offset)
{
  int depth = 0;

  while ((offset >= 0) && (depth >= 0))
    offset = fdt_next_node (fdt, offset, &depth);

  return offset;
}

int
fdt_nop_node (void *fdt, int nodeoffset)
{
  int endoffset;

  endoffset = _fdt_node_end_offset (fdt, nodeoffset);
  if (endoffset < 0)
    return endoffset;

  _fdt_nop_region (fdt_offset_ptr_w (fdt, nodeoffset, 0),
		   endoffset - nodeoffset);
  return 0;
}