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 #ifdef _KERNEL
56 #include <sys/cdefs.h>
57 #include <sys/param.h>
58 #include <sys/types.h>
59 #include <sys/systm.h>
60 #include <sys/stdint.h>
61 #else
62 #include <stddef.h>
63 #include <stdint.h>
64 #include <stdlib.h>
65 #include <string.h>
66 #endif
67
68 #ifdef __CHECKER__
69 #define FDT_FORCE __attribute__((force))
70 #define FDT_BITWISE __attribute__((bitwise))
71 #else
72 #define FDT_FORCE
73 #define FDT_BITWISE
74 #endif
75
76 typedef uint16_t FDT_BITWISE fdt16_t;
77 typedef uint32_t FDT_BITWISE fdt32_t;
78 typedef uint64_t FDT_BITWISE fdt64_t;
79
80 #define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n])
81 #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
82 #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
83 (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
84 #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
85 (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
86 (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
87 (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
88
fdt16_to_cpu(fdt16_t x)89 static inline uint16_t fdt16_to_cpu(fdt16_t x)
90 {
91 return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
92 }
cpu_to_fdt16(uint16_t x)93 static inline fdt16_t cpu_to_fdt16(uint16_t x)
94 {
95 return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
96 }
97
fdt32_to_cpu(fdt32_t x)98 static inline uint32_t fdt32_to_cpu(fdt32_t x)
99 {
100 return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
101 }
cpu_to_fdt32(uint32_t x)102 static inline fdt32_t cpu_to_fdt32(uint32_t x)
103 {
104 return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
105 }
106
fdt64_to_cpu(fdt64_t x)107 static inline uint64_t fdt64_to_cpu(fdt64_t x)
108 {
109 return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
110 }
cpu_to_fdt64(uint64_t x)111 static inline fdt64_t cpu_to_fdt64(uint64_t x)
112 {
113 return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
114 }
115 #undef CPU_TO_FDT64
116 #undef CPU_TO_FDT32
117 #undef CPU_TO_FDT16
118 #undef EXTRACT_BYTE
119
120 #ifdef __APPLE__
121 #include <AvailabilityMacros.h>
122
123 /* strnlen() is not available on Mac OS < 10.7 */
124 # if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
125 MAC_OS_X_VERSION_10_7)
126
127 #define strnlen fdt_strnlen
128
129 /*
130 * fdt_strnlen: returns the length of a string or max_count - which ever is
131 * smallest.
132 * Input 1 string: the string whose size is to be determined
133 * Input 2 max_count: the maximum value returned by this function
134 * Output: length of the string or max_count (the smallest of the two)
135 */
fdt_strnlen(const char * string,size_t max_count)136 static inline size_t fdt_strnlen(const char *string, size_t max_count)
137 {
138 const char *p = memchr(string, 0, max_count);
139 return p ? p - string : max_count;
140 }
141
142 #endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
143 MAC_OS_X_VERSION_10_7) */
144
145 #endif /* __APPLE__ */
146
147 #endif /* LIBFDT_ENV_H */
148