1204431Sraj/* 2204431Sraj * libfdt - Flat Device Tree manipulation 3204431Sraj * Copyright (C) 2006 David Gibson, IBM Corporation. 4204431Sraj * 5204431Sraj * libfdt is dual licensed: you can use it either under the terms of 6204431Sraj * the GPL, or the BSD license, at your option. 7204431Sraj * 8204431Sraj * a) This library is free software; you can redistribute it and/or 9204431Sraj * modify it under the terms of the GNU General Public License as 10204431Sraj * published by the Free Software Foundation; either version 2 of the 11204431Sraj * License, or (at your option) any later version. 12204431Sraj * 13204431Sraj * This library is distributed in the hope that it will be useful, 14204431Sraj * but WITHOUT ANY WARRANTY; without even the implied warranty of 15204431Sraj * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16204431Sraj * GNU General Public License for more details. 17204431Sraj * 18204431Sraj * You should have received a copy of the GNU General Public 19204431Sraj * License along with this library; if not, write to the Free 20204431Sraj * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, 21204431Sraj * MA 02110-1301 USA 22204431Sraj * 23204431Sraj * Alternatively, 24204431Sraj * 25204431Sraj * b) Redistribution and use in source and binary forms, with or 26204431Sraj * without modification, are permitted provided that the following 27204431Sraj * conditions are met: 28204431Sraj * 29204431Sraj * 1. Redistributions of source code must retain the above 30204431Sraj * copyright notice, this list of conditions and the following 31204431Sraj * disclaimer. 32204431Sraj * 2. Redistributions in binary form must reproduce the above 33204431Sraj * copyright notice, this list of conditions and the following 34204431Sraj * disclaimer in the documentation and/or other materials 35204431Sraj * provided with the distribution. 36204431Sraj * 37204431Sraj * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 38204431Sraj * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 39204431Sraj * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 40204431Sraj * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 41204431Sraj * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 42204431Sraj * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43204431Sraj * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44204431Sraj * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45204431Sraj * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46204431Sraj * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 47204431Sraj * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 48204431Sraj * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 49204431Sraj * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 50204431Sraj */ 51204431Sraj#include "libfdt_env.h" 52204431Sraj 53204431Sraj#include <fdt.h> 54204431Sraj#include <libfdt.h> 55204431Sraj 56204431Sraj#include "libfdt_internal.h" 57204431Sraj 58204431Srajint fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, 59204431Sraj const void *val, int len) 60204431Sraj{ 61204431Sraj void *propval; 62204431Sraj int proplen; 63204431Sraj 64204431Sraj propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen); 65204431Sraj if (! propval) 66204431Sraj return proplen; 67204431Sraj 68204431Sraj if (proplen != len) 69204431Sraj return -FDT_ERR_NOSPACE; 70204431Sraj 71204431Sraj memcpy(propval, val, len); 72204431Sraj return 0; 73204431Sraj} 74204431Sraj 75204431Srajstatic void _fdt_nop_region(void *start, int len) 76204431Sraj{ 77266130Sian fdt32_t *p; 78204431Sraj 79204431Sraj for (p = start; (char *)p < ((char *)start + len); p++) 80204431Sraj *p = cpu_to_fdt32(FDT_NOP); 81204431Sraj} 82204431Sraj 83204431Srajint fdt_nop_property(void *fdt, int nodeoffset, const char *name) 84204431Sraj{ 85204431Sraj struct fdt_property *prop; 86204431Sraj int len; 87204431Sraj 88204431Sraj prop = fdt_get_property_w(fdt, nodeoffset, name, &len); 89204431Sraj if (! prop) 90204431Sraj return len; 91204431Sraj 92204431Sraj _fdt_nop_region(prop, len + sizeof(*prop)); 93204431Sraj 94204431Sraj return 0; 95204431Sraj} 96204431Sraj 97204433Srajint _fdt_node_end_offset(void *fdt, int offset) 98204431Sraj{ 99204433Sraj int depth = 0; 100204431Sraj 101204433Sraj while ((offset >= 0) && (depth >= 0)) 102204433Sraj offset = fdt_next_node(fdt, offset, &depth); 103204431Sraj 104204433Sraj return offset; 105204431Sraj} 106204431Sraj 107204431Srajint fdt_nop_node(void *fdt, int nodeoffset) 108204431Sraj{ 109204431Sraj int endoffset; 110204431Sraj 111204431Sraj endoffset = _fdt_node_end_offset(fdt, nodeoffset); 112204431Sraj if (endoffset < 0) 113204431Sraj return endoffset; 114204431Sraj 115204431Sraj _fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0), 116204431Sraj endoffset - nodeoffset); 117204431Sraj return 0; 118204431Sraj} 119