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
67 typedef uint16_t __bitwise fdt16_t;
68 typedef uint32_t __bitwise fdt32_t;
69 typedef 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
fdt16_to_cpu(fdt16_t x)80 static inline uint16_t fdt16_to_cpu(fdt16_t x)
81 {
82 return (__force uint16_t)CPU_TO_FDT16(x);
83 }
cpu_to_fdt16(uint16_t x)84 static inline fdt16_t cpu_to_fdt16(uint16_t x)
85 {
86 return (__force fdt16_t)CPU_TO_FDT16(x);
87 }
88
fdt32_to_cpu(fdt32_t x)89 static inline uint32_t fdt32_to_cpu(fdt32_t x)
90 {
91 return (__force uint32_t)CPU_TO_FDT32(x);
92 }
cpu_to_fdt32(uint32_t x)93 static inline fdt32_t cpu_to_fdt32(uint32_t x)
94 {
95 return (__force fdt32_t)CPU_TO_FDT32(x);
96 }
97
fdt64_to_cpu(fdt64_t x)98 static inline uint64_t fdt64_to_cpu(fdt64_t x)
99 {
100 return (__force uint64_t)CPU_TO_FDT64(x);
101 }
cpu_to_fdt64(uint64_t x)102 static 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