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 <stdlib.h>
58 #include <string.h>
59
60 #ifdef __CHECKER__
61 #define FDT_FORCE __attribute__((force))
62 #define FDT_BITWISE __attribute__((bitwise))
63 #else
64 #define FDT_FORCE
65 #define FDT_BITWISE
66 #endif
67
68 typedef uint16_t FDT_BITWISE fdt16_t;
69 typedef uint32_t FDT_BITWISE fdt32_t;
70 typedef uint64_t FDT_BITWISE fdt64_t;
71 typedef uint64_t unaligned_fdt64_t __attribute__((aligned(4)));
72
73 #define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n])
74 #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
75 #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
76 (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
77 #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
78 (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
79 (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
80 (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
81
fdt16_to_cpu(fdt16_t x)82 static inline uint16_t fdt16_to_cpu(fdt16_t x)
83 {
84 return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
85 }
cpu_to_fdt16(uint16_t x)86 static inline fdt16_t cpu_to_fdt16(uint16_t x)
87 {
88 return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
89 }
90
fdt32_to_cpu(fdt32_t x)91 static inline uint32_t fdt32_to_cpu(fdt32_t x)
92 {
93 return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
94 }
cpu_to_fdt32(uint32_t x)95 static inline fdt32_t cpu_to_fdt32(uint32_t x)
96 {
97 return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
98 }
99
fdt64_to_cpu(fdt64_t x)100 static inline uint64_t fdt64_to_cpu(fdt64_t x)
101 {
102 return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
103 }
cpu_to_fdt64(uint64_t x)104 static inline fdt64_t cpu_to_fdt64(uint64_t x)
105 {
106 return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
107 }
108 #undef CPU_TO_FDT64
109 #undef CPU_TO_FDT32
110 #undef CPU_TO_FDT16
111 #undef EXTRACT_BYTE
112
113 #endif /* _LIBFDT_ENV_H */
114