1 /* $NetBSD: fdt_wip.c,v 1.1.1.2 2017/06/08 15:53:12 skrll Exp $ */ 2 3 /* 4 * libfdt - Flat Device Tree manipulation 5 * Copyright (C) 2006 David Gibson, IBM Corporation. 6 * 7 * libfdt is dual licensed: you can use it either under the terms of 8 * the GPL, or the BSD license, at your option. 9 * 10 * a) This library is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License as 12 * published by the Free Software Foundation; either version 2 of the 13 * License, or (at your option) any later version. 14 * 15 * This library is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this library; if not, write to the Free 22 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, 23 * MA 02110-1301 USA 24 * 25 * Alternatively, 26 * 27 * b) Redistribution and use in source and binary forms, with or 28 * without modification, are permitted provided that the following 29 * conditions are met: 30 * 31 * 1. Redistributions of source code must retain the above 32 * copyright notice, this list of conditions and the following 33 * disclaimer. 34 * 2. Redistributions in binary form must reproduce the above 35 * copyright notice, this list of conditions and the following 36 * disclaimer in the documentation and/or other materials 37 * provided with the distribution. 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 40 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 41 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 42 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 43 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 44 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 49 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 50 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 51 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 52 */ 53 #include "libfdt_env.h" 54 55 #include <fdt.h> 56 #include <libfdt.h> 57 58 #include "libfdt_internal.h" 59 60 int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset, 61 const char *name, int namelen, 62 uint32_t idx, const void *val, 63 int len) 64 { 65 void *propval; 66 int proplen; 67 68 propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen, 69 &proplen); 70 if (!propval) 71 return proplen; 72 73 if (proplen < (len + idx)) 74 return -FDT_ERR_NOSPACE; 75 76 memcpy((char *)propval + idx, val, len); 77 return 0; 78 } 79 80 int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, 81 const void *val, int len) 82 { 83 const void *propval; 84 int proplen; 85 86 propval = fdt_getprop(fdt, nodeoffset, name, &proplen); 87 if (! propval) 88 return proplen; 89 90 if (proplen != len) 91 return -FDT_ERR_NOSPACE; 92 93 return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name, 94 strlen(name), 0, 95 val, len); 96 } 97 98 static void _fdt_nop_region(void *start, int len) 99 { 100 fdt32_t *p; 101 102 for (p = start; (char *)p < ((char *)start + len); p++) 103 *p = cpu_to_fdt32(FDT_NOP); 104 } 105 106 int fdt_nop_property(void *fdt, int nodeoffset, const char *name) 107 { 108 struct fdt_property *prop; 109 int len; 110 111 prop = fdt_get_property_w(fdt, nodeoffset, name, &len); 112 if (! prop) 113 return len; 114 115 _fdt_nop_region(prop, len + sizeof(*prop)); 116 117 return 0; 118 } 119 120 int _fdt_node_end_offset(void *fdt, int offset) 121 { 122 int depth = 0; 123 124 while ((offset >= 0) && (depth >= 0)) 125 offset = fdt_next_node(fdt, offset, &depth); 126 127 return offset; 128 } 129 130 int fdt_nop_node(void *fdt, int nodeoffset) 131 { 132 int endoffset; 133 134 endoffset = _fdt_node_end_offset(fdt, nodeoffset); 135 if (endoffset < 0) 136 return endoffset; 137 138 _fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0), 139 endoffset - nodeoffset); 140 return 0; 141 } 142