b6d80a20fc
libfdt is supposed to easy to embed in projects all and sundry.
Often, it won't be practical to separate the embedded libfdt's
namespace from that of the surrounding project. Which means there can
be namespace conflicts between even libfdt's internal/static functions
and functions or macros coming from the surrounding project's headers
via libfdt_env.h.
This patch, therefore, renames a bunch of libfdt internal functions
and macros and makes a few other chances to reduce the chances of
namespace collisions with embedding projects. Specifically:
- Internal functions (even static ones) are now named _fdt_*()
- The type and (static) global for the error table in
fdt_strerror() gain an fdt_ prefix
- The unused macro PALIGN is removed
- The memeq and streq macros are removed and open-coded in the
users (they were only used once each)
- Other macros gain an FDT_ prefix
- To save some of the bulk from the previous change, an
FDT_TAGALIGN() macro is introduced, where FDT_TAGALIGN(x) ==
FDT_ALIGN(x, FDT_TAGSIZE)
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
145 lines
4 KiB
C
145 lines
4 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(void *fdt, int nodeoffset, const char *name,
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const void *val, 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_w(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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memcpy(propval, val, len);
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return 0;
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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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uint32_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 nodeoffset)
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{
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int level = 0;
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uint32_t tag;
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int offset, nextoffset;
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tag = fdt_next_tag(fdt, nodeoffset, &nextoffset);
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if (tag != FDT_BEGIN_NODE)
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return -FDT_ERR_BADOFFSET;
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do {
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offset = nextoffset;
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tag = fdt_next_tag(fdt, offset, &nextoffset);
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switch (tag) {
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case FDT_END:
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return offset;
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case FDT_BEGIN_NODE:
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level++;
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break;
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case FDT_END_NODE:
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level--;
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break;
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case FDT_PROP:
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case FDT_NOP:
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break;
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default:
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return -FDT_ERR_BADSTRUCTURE;
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}
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} while (level >= 0);
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return nextoffset;
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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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