libfdt_env.h revision 266130 
1#ifndef _LIBFDT_ENV_H
2#define _LIBFDT_ENV_H
3/*
4 * libfdt - Flat Device Tree manipulation
5 * Copyright (C) 2006 David Gibson, IBM Corporation.
6 * Copyright 2012 Kim Phillips, Freescale Semiconductor.
7 *
8 * libfdt is dual licensed: you can use it either under the terms of
9 * the GPL, or the BSD license, at your option.
10 *
11 *  a) This library is free software; you can redistribute it and/or
12 *     modify it under the terms of the GNU General Public License as
13 *     published by the Free Software Foundation; either version 2 of the
14 *     License, or (at your option) any later version.
15 *
16 *     This library is distributed in the hope that it will be useful,
17 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
18 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19 *     GNU General Public License for more details.
20 *
21 *     You should have received a copy of the GNU General Public
22 *     License along with this library; if not, write to the Free
23 *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
24 *     MA 02110-1301 USA
25 *
26 * Alternatively,
27 *
28 *  b) Redistribution and use in source and binary forms, with or
29 *     without modification, are permitted provided that the following
30 *     conditions are met:
31 *
32 *     1. Redistributions of source code must retain the above
33 *        copyright notice, this list of conditions and the following
34 *        disclaimer.
35 *     2. Redistributions in binary form must reproduce the above
36 *        copyright notice, this list of conditions and the following
37 *        disclaimer in the documentation and/or other materials
38 *        provided with the distribution.
39 *
40 *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
41 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
42 *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
43 *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44 *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
45 *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
47 *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
48 *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49 *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
50 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
51 *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
52 *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
53 */
54
55#include <stddef.h>
56#include <stdint.h>
57#include <string.h>
58
59#ifdef __CHECKER__
60#define __force __attribute__((force))
61#define __bitwise __attribute__((bitwise))
62#else
63#define __force
64#define __bitwise
65#endif
66
67typedef uint16_t __bitwise fdt16_t;
68typedef uint32_t __bitwise fdt32_t;
69typedef uint64_t __bitwise fdt64_t;
70
71#define EXTRACT_BYTE(x, n)	((unsigned long long)((uint8_t *)&x)[n])
72#define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
73#define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
74			 (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
75#define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
76			 (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
77			 (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
78			 (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
79
80static inline uint16_t fdt16_to_cpu(fdt16_t x)
81{
82	return (__force uint16_t)CPU_TO_FDT16(x);
83}
84static inline fdt16_t cpu_to_fdt16(uint16_t x)
85{
86	return (__force fdt16_t)CPU_TO_FDT16(x);
87}
88
89static inline uint32_t fdt32_to_cpu(fdt32_t x)
90{
91	return (__force uint32_t)CPU_TO_FDT32(x);
92}
93static inline fdt32_t cpu_to_fdt32(uint32_t x)
94{
95	return (__force fdt32_t)CPU_TO_FDT32(x);
96}
97
98static inline uint64_t fdt64_to_cpu(fdt64_t x)
99{
100	return (__force uint64_t)CPU_TO_FDT64(x);
101}
102static inline fdt64_t cpu_to_fdt64(uint64_t x)
103{
104	return (__force fdt64_t)CPU_TO_FDT64(x);
105}
106#undef CPU_TO_FDT64
107#undef CPU_TO_FDT32
108#undef CPU_TO_FDT16
109#undef EXTRACT_BYTE
110
111#endif /* _LIBFDT_ENV_H */
112