path: root/scripts/dtc/libfdt/libfdt.h

#ifndef _LIBFDT_H
#define _LIBFDT_H
/*
 * 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"

#define FDT_FIRST_SUPPORTED_VERSION	0x10
#define FDT_LAST_SUPPORTED_VERSION	0x11

/* Error codes: informative error codes */
#define FDT_ERR_NOTFOUND	1
	/* FDT_ERR_NOTFOUND: The requested node or property does not exist */
#define FDT_ERR_EXISTS		2
	/* FDT_ERR_EXISTS: Attemped to create a node or property which
	 * already exists */
#define FDT_ERR_NOSPACE		3
	/* FDT_ERR_NOSPACE: Operation needed to expand the device
	 * tree, but its buffer did not have sufficient space to
	 * contain the expanded tree. Use fdt_open_into() to move the
	 * device tree to a buffer with more space. */

/* Error codes: codes for bad parameters */
#define FDT_ERR_BADOFFSET	4
	/* FDT_ERR_BADOFFSET: Function was passed a structure block
	 * offset which is out-of-bounds, or which points to an
	 * unsuitable part of the structure for the operation. */
#define FDT_ERR_BADPATH		5
	/* FDT_ERR_BADPATH: Function was passed a badly formatted path
	 * (e.g. missing a leading / for a function which requires an
	 * absolute path) */
#define FDT_ERR_BADPHANDLE	6
	/* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle
	 * value.  phandle values of 0 and -1 are not permitted. */
#define FDT_ERR_BADSTATE	7
	/* FDT_ERR_BADSTATE: Function was passed an incomplete device
	 * tree created by the sequential-write functions, which is
	 * not sufficiently complete for the requested operation. */

/* Error codes: codes for bad device tree blobs */
#define FDT_ERR_TRUNCATED	8
	/* FDT_ERR_TRUNCATED: Structure block of the given device tree
	 * ends without an FDT_END tag. */
#define FDT_ERR_BADMAGIC	9
	/* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a
	 * device tree at all - it is missing the flattened device
	 * tree magic number. */
#define FDT_ERR_BADVERSION	10
	/* FDT_ERR_BADVERSION: Given device tree has a version which
	 * can't be handled by the requested operation.  For
	 * read-write functions, this may mean that fdt_open_into() is
	 * required to convert the tree to the expected version. */
#define FDT_ERR_BADSTRUCTURE	11
	/* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt
	 * structure block or other serious error (e.g. misnested
	 * nodes, or subnodes preceding properties). */
#define FDT_ERR_BADLAYOUT	12
	/* FDT_ERR_BADLAYOUT: For read-write functions, the given
	 * device tree has it's sub-blocks in an order that the
	 * function can't handle (memory reserve map, then structure,
	 * then strings).  Use fdt_open_into() to reorganize the tree
	 * into a form suitable for the read-write operations. */

/* "Can't happen" error indicating a bug in libfdt */
#define FDT_ERR_INTERNAL	13
	/* FDT_ERR_INTERNAL: libfdt has failed an internal assertion.
	 * Should never be returned, if it is, it indicates a bug in
	 * libfdt itself. */

/* Errors in device tree content */
#define FDT_ERR_BADNCELLS	14
	/* FDT_ERR_BADNCELLS: Device tree has a #address-cells, #size-cells
	 * or similar property with a bad format or value */

#define FDT_ERR_MAX		14

/**********************************************************************/
/* Low-level functions (you probably don't need these)                */
/**********************************************************************/

const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);
static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)
{
	return (void *)(uintptr_t)