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 | #include <limits.h> |
60 | |
61 | #ifdef __CHECKER__ |
62 | #define FDT_FORCE __attribute__((force)) |
63 | #define FDT_BITWISE __attribute__((bitwise)) |
64 | #else |
65 | #define FDT_FORCE |
66 | #define FDT_BITWISE |
67 | #endif |
68 | |
69 | typedef uint16_t FDT_BITWISE fdt16_t; |
70 | typedef uint32_t FDT_BITWISE fdt32_t; |
71 | typedef uint64_t FDT_BITWISE fdt64_t; |
72 | |
73 | #define (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 | |
82 | static inline uint16_t fdt16_to_cpu(fdt16_t x) |
83 | { |
84 | return (FDT_FORCE uint16_t)CPU_TO_FDT16(x); |
85 | } |
86 | static inline fdt16_t cpu_to_fdt16(uint16_t x) |
87 | { |
88 | return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x); |
89 | } |
90 | |
91 | static inline uint32_t fdt32_to_cpu(fdt32_t x) |
92 | { |
93 | return (FDT_FORCE uint32_t)CPU_TO_FDT32(x); |
94 | } |
95 | static inline fdt32_t cpu_to_fdt32(uint32_t x) |
96 | { |
97 | return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x); |
98 | } |
99 | |
100 | static inline uint64_t fdt64_to_cpu(fdt64_t x) |
101 | { |
102 | return (FDT_FORCE uint64_t)CPU_TO_FDT64(x); |
103 | } |
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 | #ifdef __APPLE__ |
114 | #include <AvailabilityMacros.h> |
115 | |
116 | /* strnlen() is not available on Mac OS < 10.7 */ |
117 | # if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \ |
118 | MAC_OS_X_VERSION_10_7) |
119 | |
120 | #define strnlen fdt_strnlen |
121 | |
122 | /* |
123 | * fdt_strnlen: returns the length of a string or max_count - which ever is |
124 | * smallest. |
125 | * Input 1 string: the string whose size is to be determined |
126 | * Input 2 max_count: the maximum value returned by this function |
127 | * Output: length of the string or max_count (the smallest of the two) |
128 | */ |
129 | static inline size_t fdt_strnlen(const char *string, size_t max_count) |
130 | { |
131 | const char *p = memchr(string, 0, max_count); |
132 | return p ? p - string : max_count; |
133 | } |
134 | |
135 | #endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < |
136 | MAC_OS_X_VERSION_10_7) */ |
137 | |
138 | #endif /* __APPLE__ */ |
139 | |
140 | #endif /* LIBFDT_ENV_H */ |
141 | |