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fdt_addresses.c revision 1.1.1.1.2.2 
      1  1.1.1.1.2.2  skrll /*
      2  1.1.1.1.2.2  skrll  * libfdt - Flat Device Tree manipulation
      3  1.1.1.1.2.2  skrll  * Copyright (C) 2014 David Gibson <david (at) gibson.dropbear.id.au>
      4  1.1.1.1.2.2  skrll  *
      5  1.1.1.1.2.2  skrll  * libfdt is dual licensed: you can use it either under the terms of
      6  1.1.1.1.2.2  skrll  * the GPL, or the BSD license, at your option.
      7  1.1.1.1.2.2  skrll  *
      8  1.1.1.1.2.2  skrll  *  a) This library is free software; you can redistribute it and/or
      9  1.1.1.1.2.2  skrll  *     modify it under the terms of the GNU General Public License as
     10  1.1.1.1.2.2  skrll  *     published by the Free Software Foundation; either version 2 of the
     11  1.1.1.1.2.2  skrll  *     License, or (at your option) any later version.
     12  1.1.1.1.2.2  skrll  *
     13  1.1.1.1.2.2  skrll  *     This library is distributed in the hope that it will be useful,
     14  1.1.1.1.2.2  skrll  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  1.1.1.1.2.2  skrll  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16  1.1.1.1.2.2  skrll  *     GNU General Public License for more details.
     17  1.1.1.1.2.2  skrll  *
     18  1.1.1.1.2.2  skrll  *     You should have received a copy of the GNU General Public
     19  1.1.1.1.2.2  skrll  *     License along with this library; if not, write to the Free
     20  1.1.1.1.2.2  skrll  *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
     21  1.1.1.1.2.2  skrll  *     MA 02110-1301 USA
     22  1.1.1.1.2.2  skrll  *
     23  1.1.1.1.2.2  skrll  * Alternatively,
     24  1.1.1.1.2.2  skrll  *
     25  1.1.1.1.2.2  skrll  *  b) Redistribution and use in source and binary forms, with or
     26  1.1.1.1.2.2  skrll  *     without modification, are permitted provided that the following
     27  1.1.1.1.2.2  skrll  *     conditions are met:
     28  1.1.1.1.2.2  skrll  *
     29  1.1.1.1.2.2  skrll  *     1. Redistributions of source code must retain the above
     30  1.1.1.1.2.2  skrll  *        copyright notice, this list of conditions and the following
     31  1.1.1.1.2.2  skrll  *        disclaimer.
     32  1.1.1.1.2.2  skrll  *     2. Redistributions in binary form must reproduce the above
     33  1.1.1.1.2.2  skrll  *        copyright notice, this list of conditions and the following
     34  1.1.1.1.2.2  skrll  *        disclaimer in the documentation and/or other materials
     35  1.1.1.1.2.2  skrll  *        provided with the distribution.
     36  1.1.1.1.2.2  skrll  *
     37  1.1.1.1.2.2  skrll  *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
     38  1.1.1.1.2.2  skrll  *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
     39  1.1.1.1.2.2  skrll  *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     40  1.1.1.1.2.2  skrll  *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     41  1.1.1.1.2.2  skrll  *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     42  1.1.1.1.2.2  skrll  *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     43  1.1.1.1.2.2  skrll  *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     44  1.1.1.1.2.2  skrll  *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     45  1.1.1.1.2.2  skrll  *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     46  1.1.1.1.2.2  skrll  *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     47  1.1.1.1.2.2  skrll  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     48  1.1.1.1.2.2  skrll  *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
     49  1.1.1.1.2.2  skrll  *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     50  1.1.1.1.2.2  skrll  */
     51  1.1.1.1.2.2  skrll #include "libfdt_env.h"
     52  1.1.1.1.2.2  skrll 
     53  1.1.1.1.2.2  skrll #include <fdt.h>
     54  1.1.1.1.2.2  skrll #include <libfdt.h>
     55  1.1.1.1.2.2  skrll 
     56  1.1.1.1.2.2  skrll #include "libfdt_internal.h"
     57  1.1.1.1.2.2  skrll 
     58  1.1.1.1.2.2  skrll int fdt_address_cells(const void *fdt, int nodeoffset)
     59  1.1.1.1.2.2  skrll {
     60  1.1.1.1.2.2  skrll 	const fdt32_t *ac;
     61  1.1.1.1.2.2  skrll 	int val;
     62  1.1.1.1.2.2  skrll 	int len;
     63  1.1.1.1.2.2  skrll 
     64  1.1.1.1.2.2  skrll 	ac = fdt_getprop(fdt, nodeoffset, "#address-cells", &len);
     65  1.1.1.1.2.2  skrll 	if (!ac)
     66  1.1.1.1.2.2  skrll 		return 2;
     67  1.1.1.1.2.2  skrll 
     68  1.1.1.1.2.2  skrll 	if (len != sizeof(*ac))
     69  1.1.1.1.2.2  skrll 		return -FDT_ERR_BADNCELLS;
     70  1.1.1.1.2.2  skrll 
     71  1.1.1.1.2.2  skrll 	val = fdt32_to_cpu(*ac);
     72  1.1.1.1.2.2  skrll 	if ((val <= 0) || (val > FDT_MAX_NCELLS))
     73  1.1.1.1.2.2  skrll 		return -FDT_ERR_BADNCELLS;
     74  1.1.1.1.2.2  skrll 
     75  1.1.1.1.2.2  skrll 	return val;
     76  1.1.1.1.2.2  skrll }
     77  1.1.1.1.2.2  skrll 
     78  1.1.1.1.2.2  skrll int fdt_size_cells(const void *fdt, int nodeoffset)
     79  1.1.1.1.2.2  skrll {
     80  1.1.1.1.2.2  skrll 	const fdt32_t *sc;
     81  1.1.1.1.2.2  skrll 	int val;
     82  1.1.1.1.2.2  skrll 	int len;
     83  1.1.1.1.2.2  skrll 
     84  1.1.1.1.2.2  skrll 	sc = fdt_getprop(fdt, nodeoffset, "#size-cells", &len);
     85  1.1.1.1.2.2  skrll 	if (!sc)
     86  1.1.1.1.2.2  skrll 		return 2;
     87  1.1.1.1.2.2  skrll 
     88  1.1.1.1.2.2  skrll 	if (len != sizeof(*sc))
     89  1.1.1.1.2.2  skrll 		return -FDT_ERR_BADNCELLS;
     90  1.1.1.1.2.2  skrll 
     91  1.1.1.1.2.2  skrll 	val = fdt32_to_cpu(*sc);
     92  1.1.1.1.2.2  skrll 	if ((val < 0) || (val > FDT_MAX_NCELLS))
     93  1.1.1.1.2.2  skrll 		return -FDT_ERR_BADNCELLS;
     94  1.1.1.1.2.2  skrll 
     95  1.1.1.1.2.2  skrll 	return val;
     96  1.1.1.1.2.2  skrll }
     97