/*

 * 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 nodeoffset)

{

	int level = 0;

	uint32_t tag;

	int offset, nextoffset;

	tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);

	if (tag != FDT_BEGIN_NODE)

		return -FDT_ERR_BADOFFSET;

	do {

		offset = nextoffset;

		tag = fdt_next_tag(fdt, offset, &nextoffset);

		switch (tag) {

		case FDT_END:

			return offset;

		case FDT_BEGIN_NODE:

			level++;

			break;

		case FDT_END_NODE:

			level--;

			break;

		case FDT_PROP:

		case FDT_NOP:

			break;

		default:

			return -FDT_ERR_BADSTRUCTURE;

		}

	} while (level >= 0);

	return nextoffset;

}

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;

}