| /* |
| * 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> |
| #include <libfdt.h> |
| |
| #include "libfdt_internal.h" |
| |
| int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, |
| const void *val, int len) |
| { |
| void *propval; |
| int proplen; |
| |
| propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen); |
| if (! propval) |
| return proplen; |
| |
| if (proplen != len) |
| return -FDT_ERR_NOSPACE; |
| |
| memcpy(propval, val, len); |
| return 0; |
| } |
| |
| static void _fdt_nop_region(void *start, int len) |
| { |
| uint32_t *p; |
| |
| for (p = start; (char *)p < ((char *)start + len); p++) |
| *p = cpu_to_fdt32(FDT_NOP); |
| } |
| |
| int fdt_nop_property(void *fdt, int nodeoffset, const char *name) |
| { |
| struct fdt_property *prop; |
| int len; |
| |
| prop = fdt_get_property_w(fdt, nodeoffset, name, &len); |
| if (! prop) |
| return len; |
| |
| _fdt_nop_region(prop, len + sizeof(*prop)); |
| |
| return 0; |
| } |
| |
| int _fdt_node_end_offset(void *fdt, int offset) |
| { |
| int depth = 0; |
| |
| while ((offset >= 0) && (depth >= 0)) |
| offset = fdt_next_node(fdt, offset, &depth); |
| |
| return offset; |
| } |
| |
| int fdt_nop_node(void *fdt, int nodeoffset) |
| { |
| int endoffset; |
| |
| endoffset = _fdt_node_end_offset(fdt, nodeoffset); |
| if (endoffset < 0) |
| return endoffset; |
| |
| _fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0), |
| endoffset - nodeoffset); |
| return 0; |
| } |