fdt_wip.c revision 266130
1228944Sadrian/* 2228944Sadrian * libfdt - Flat Device Tree manipulation 3228944Sadrian * Copyright (C) 2006 David Gibson, IBM Corporation. 4228944Sadrian * 5250419Sadrian * libfdt is dual licensed: you can use it either under the terms of 6250419Sadrian * the GPL, or the BSD license, at your option. 7250419Sadrian * 8250419Sadrian * a) This library is free software; you can redistribute it and/or 9250419Sadrian * modify it under the terms of the GNU General Public License as 10250419Sadrian * published by the Free Software Foundation; either version 2 of the 11228944Sadrian * License, or (at your option) any later version. 12228944Sadrian * 13228944Sadrian * This library is distributed in the hope that it will be useful, 14250385Sadrian * but WITHOUT ANY WARRANTY; without even the implied warranty of 15228944Sadrian * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16228944Sadrian * GNU General Public License for more details. 17228944Sadrian * 18228944Sadrian * You should have received a copy of the GNU General Public 19250385Sadrian * License along with this library; if not, write to the Free 20250385Sadrian * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, 21228944Sadrian * MA 02110-1301 USA 22250385Sadrian * 23250385Sadrian * Alternatively, 24250385Sadrian * 25250385Sadrian * b) Redistribution and use in source and binary forms, with or 26254989Sloos * without modification, are permitted provided that the following 27254989Sloos * conditions are met: 28254989Sloos * 29254989Sloos * 1. Redistributions of source code must retain the above 30254989Sloos * copyright notice, this list of conditions and the following 31254989Sloos * disclaimer. 32254989Sloos * 2. Redistributions in binary form must reproduce the above 33254989Sloos * copyright notice, this list of conditions and the following 34254989Sloos * disclaimer in the documentation and/or other materials 35254989Sloos * provided with the distribution. 36254989Sloos * 37254989Sloos * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 38254989Sloos * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 39254989Sloos * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 40254989Sloos * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 41254989Sloos * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 42254989Sloos * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43254989Sloos * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44228944Sadrian * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45228944Sadrian * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46228944Sadrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 47228944Sadrian * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 48228944Sadrian * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 49 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 50 */ 51#include "libfdt_env.h" 52 53#include <fdt.h> 54#include <libfdt.h> 55 56#include "libfdt_internal.h" 57 58int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, 59 const void *val, int len) 60{ 61 void *propval; 62 int proplen; 63 64 propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen); 65 if (! propval) 66 return proplen; 67 68 if (proplen != len) 69 return -FDT_ERR_NOSPACE; 70 71 memcpy(propval, val, len); 72 return 0; 73} 74 75static void _fdt_nop_region(void *start, int len) 76{ 77 fdt32_t *p; 78 79 for (p = start; (char *)p < ((char *)start + len); p++) 80 *p = cpu_to_fdt32(FDT_NOP); 81} 82 83int fdt_nop_property(void *fdt, int nodeoffset, const char *name) 84{ 85 struct fdt_property *prop; 86 int len; 87 88 prop = fdt_get_property_w(fdt, nodeoffset, name, &len); 89 if (! prop) 90 return len; 91 92 _fdt_nop_region(prop, len + sizeof(*prop)); 93 94 return 0; 95} 96 97int _fdt_node_end_offset(void *fdt, int offset) 98{ 99 int depth = 0; 100 101 while ((offset >= 0) && (depth >= 0)) 102 offset = fdt_next_node(fdt, offset, &depth); 103 104 return offset; 105} 106 107int fdt_nop_node(void *fdt, int nodeoffset) 108{ 109 int endoffset; 110 111 endoffset = _fdt_node_end_offset(fdt, nodeoffset); 112 if (endoffset < 0) 113 return endoffset; 114 115 _fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0), 116 endoffset - nodeoffset); 117 return 0; 118} 119