138 lines
4.3 KiB
C
138 lines
4.3 KiB
C
/*
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* libfdt - Flat Device Tree manipulation
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* Copyright (C) 2006 David Gibson, IBM Corporation.
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*
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* libfdt is dual licensed: you can use it either under the terms of
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* the GPL, or the BSD license, at your option.
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*
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* a) This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*
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* Alternatively,
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*
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* b) Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "libfdt_env.h"
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#include "fdt.h"
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#include "libfdt.h"
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#include "libfdt_internal.h"
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int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
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const char *name, int namelen,
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uint32_t idx, const void *val,
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int len)
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{
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void *propval;
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int proplen;
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propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen,
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&proplen);
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if (!propval)
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return proplen;
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if (proplen < (len + idx))
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return -FDT_ERR_NOSPACE;
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memcpy((char *)propval + idx, val, len);
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return 0;
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}
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int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
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const void *val, int len)
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{
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const void *propval;
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int proplen;
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propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
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if (! propval)
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return proplen;
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if (proplen != len)
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return -FDT_ERR_NOSPACE;
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return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name,
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strlen(name), 0,
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val, len);
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}
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static void _fdt_nop_region(void *start, int len)
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{
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fdt32_t *p;
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for (p = start; (char *)p < ((char *)start + len); p++)
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*p = cpu_to_fdt32(FDT_NOP);
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}
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int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
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{
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struct fdt_property *prop;
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int len;
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prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
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if (! prop)
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return len;
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_fdt_nop_region(prop, len + sizeof(*prop));
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return 0;
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}
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int _fdt_node_end_offset(void *fdt, int offset)
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{
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int depth = 0;
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while ((offset >= 0) && (depth >= 0))
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offset = fdt_next_node(fdt, offset, &depth);
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return offset;
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}
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int fdt_nop_node(void *fdt, int nodeoffset)
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{
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int endoffset;
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endoffset = _fdt_node_end_offset(fdt, nodeoffset);
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if (endoffset < 0)
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return endoffset;
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_fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0),
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endoffset - nodeoffset);
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return 0;
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}
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