1*553125dfSNikos Nikoleris /* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
2*553125dfSNikos Nikoleris #ifndef LIBFDT_ENV_H
3*553125dfSNikos Nikoleris #define LIBFDT_ENV_H
4a322d4c5SAndrew Jones /*
5a322d4c5SAndrew Jones * libfdt - Flat Device Tree manipulation
6a322d4c5SAndrew Jones * Copyright (C) 2006 David Gibson, IBM Corporation.
7a322d4c5SAndrew Jones * Copyright 2012 Kim Phillips, Freescale Semiconductor.
8a322d4c5SAndrew Jones */
9a322d4c5SAndrew Jones
10*553125dfSNikos Nikoleris #include <stdbool.h>
11a322d4c5SAndrew Jones #include <stddef.h>
12a322d4c5SAndrew Jones #include <stdint.h>
13*553125dfSNikos Nikoleris #include <stdlib.h>
14a322d4c5SAndrew Jones #include <string.h>
15*553125dfSNikos Nikoleris #include <limits.h>
16a322d4c5SAndrew Jones
17a322d4c5SAndrew Jones #ifdef __CHECKER__
18*553125dfSNikos Nikoleris #define FDT_FORCE __attribute__((force))
19*553125dfSNikos Nikoleris #define FDT_BITWISE __attribute__((bitwise))
20a322d4c5SAndrew Jones #else
21*553125dfSNikos Nikoleris #define FDT_FORCE
22*553125dfSNikos Nikoleris #define FDT_BITWISE
23a322d4c5SAndrew Jones #endif
24a322d4c5SAndrew Jones
25*553125dfSNikos Nikoleris typedef uint16_t FDT_BITWISE fdt16_t;
26*553125dfSNikos Nikoleris typedef uint32_t FDT_BITWISE fdt32_t;
27*553125dfSNikos Nikoleris typedef uint64_t FDT_BITWISE fdt64_t;
28a322d4c5SAndrew Jones
29a322d4c5SAndrew Jones #define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n])
30a322d4c5SAndrew Jones #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
31a322d4c5SAndrew Jones #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
32a322d4c5SAndrew Jones (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
33a322d4c5SAndrew Jones #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
34a322d4c5SAndrew Jones (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
35a322d4c5SAndrew Jones (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
36a322d4c5SAndrew Jones (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
37a322d4c5SAndrew Jones
fdt16_to_cpu(fdt16_t x)38a322d4c5SAndrew Jones static inline uint16_t fdt16_to_cpu(fdt16_t x)
39a322d4c5SAndrew Jones {
40*553125dfSNikos Nikoleris return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
41a322d4c5SAndrew Jones }
cpu_to_fdt16(uint16_t x)42a322d4c5SAndrew Jones static inline fdt16_t cpu_to_fdt16(uint16_t x)
43a322d4c5SAndrew Jones {
44*553125dfSNikos Nikoleris return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
45a322d4c5SAndrew Jones }
46a322d4c5SAndrew Jones
fdt32_to_cpu(fdt32_t x)47a322d4c5SAndrew Jones static inline uint32_t fdt32_to_cpu(fdt32_t x)
48a322d4c5SAndrew Jones {
49*553125dfSNikos Nikoleris return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
50a322d4c5SAndrew Jones }
cpu_to_fdt32(uint32_t x)51a322d4c5SAndrew Jones static inline fdt32_t cpu_to_fdt32(uint32_t x)
52a322d4c5SAndrew Jones {
53*553125dfSNikos Nikoleris return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
54a322d4c5SAndrew Jones }
55a322d4c5SAndrew Jones
fdt64_to_cpu(fdt64_t x)56a322d4c5SAndrew Jones static inline uint64_t fdt64_to_cpu(fdt64_t x)
57a322d4c5SAndrew Jones {
58*553125dfSNikos Nikoleris return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
59a322d4c5SAndrew Jones }
cpu_to_fdt64(uint64_t x)60a322d4c5SAndrew Jones static inline fdt64_t cpu_to_fdt64(uint64_t x)
61a322d4c5SAndrew Jones {
62*553125dfSNikos Nikoleris return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
63a322d4c5SAndrew Jones }
64a322d4c5SAndrew Jones #undef CPU_TO_FDT64
65a322d4c5SAndrew Jones #undef CPU_TO_FDT32
66a322d4c5SAndrew Jones #undef CPU_TO_FDT16
67a322d4c5SAndrew Jones #undef EXTRACT_BYTE
68a322d4c5SAndrew Jones
69*553125dfSNikos Nikoleris #ifdef __APPLE__
70*553125dfSNikos Nikoleris #include <AvailabilityMacros.h>
71*553125dfSNikos Nikoleris
72*553125dfSNikos Nikoleris /* strnlen() is not available on Mac OS < 10.7 */
73*553125dfSNikos Nikoleris # if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
74*553125dfSNikos Nikoleris MAC_OS_X_VERSION_10_7)
75*553125dfSNikos Nikoleris
76*553125dfSNikos Nikoleris #define strnlen fdt_strnlen
77*553125dfSNikos Nikoleris
78*553125dfSNikos Nikoleris /*
79*553125dfSNikos Nikoleris * fdt_strnlen: returns the length of a string or max_count - which ever is
80*553125dfSNikos Nikoleris * smallest.
81*553125dfSNikos Nikoleris * Input 1 string: the string whose size is to be determined
82*553125dfSNikos Nikoleris * Input 2 max_count: the maximum value returned by this function
83*553125dfSNikos Nikoleris * Output: length of the string or max_count (the smallest of the two)
84*553125dfSNikos Nikoleris */
fdt_strnlen(const char * string,size_t max_count)85*553125dfSNikos Nikoleris static inline size_t fdt_strnlen(const char *string, size_t max_count)
86*553125dfSNikos Nikoleris {
87*553125dfSNikos Nikoleris const char *p = memchr(string, 0, max_count);
88*553125dfSNikos Nikoleris return p ? p - string : max_count;
89*553125dfSNikos Nikoleris }
90*553125dfSNikos Nikoleris
91*553125dfSNikos Nikoleris #endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
92*553125dfSNikos Nikoleris MAC_OS_X_VERSION_10_7) */
93*553125dfSNikos Nikoleris
94*553125dfSNikos Nikoleris #endif /* __APPLE__ */
95*553125dfSNikos Nikoleris
96*553125dfSNikos Nikoleris #endif /* LIBFDT_ENV_H */
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