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libfdt_internal.h
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1 #ifndef _LIBFDT_INTERNAL_H
2 #define _LIBFDT_INTERNAL_H
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 <fdt.h>
54 
55 #define FDT_ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
56 #define FDT_TAGALIGN(x) (FDT_ALIGN((x), FDT_TAGSIZE))
57 
58 #define FDT_CHECK_HEADER(fdt) \
59  { \
60  int err; \
61  if ((err = fdt_check_header(fdt)) != 0) \
62  return err; \
63  }
64 
65 int _fdt_check_node_offset(const void *fdt, int offset);
66 int _fdt_check_prop_offset(const void *fdt, int offset);
67 const char *_fdt_find_string(const char *strtab, int tabsize, const char *s);
68 int _fdt_node_end_offset(void *fdt, int nodeoffset);
69 
70 static inline const void *_fdt_offset_ptr(const void *fdt, int offset)
71 {
72  return (const char *)fdt + fdt_off_dt_struct(fdt) + offset;
73 }
74 
75 static inline void *_fdt_offset_ptr_w(void *fdt, int offset)
76 {
77  return (void *)(uintptr_t)_fdt_offset_ptr(fdt, offset);
78 }
79 
80 static inline const struct fdt_reserve_entry *_fdt_mem_rsv(const void *fdt, int n)
81 {
82  const struct fdt_reserve_entry *rsv_table =
83  (const struct fdt_reserve_entry *)
84  ((const char *)fdt + fdt_off_mem_rsvmap(fdt));
85 
86  return rsv_table + n;
87 }
88 static inline struct fdt_reserve_entry *_fdt_mem_rsv_w(void *fdt, int n)
89 {
90  return (void *)(uintptr_t)_fdt_mem_rsv(fdt, n);
91 }
92 
93 #define FDT_SW_MAGIC (~FDT_MAGIC)
94 
95 #endif /* _LIBFDT_INTERNAL_H */