1 /* SPDX-License-Identifier: (GPL-2.0-or-later 1 /* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
2 #ifndef LIBFDT_ENV_H 2 #ifndef LIBFDT_ENV_H
3 #define LIBFDT_ENV_H 3 #define LIBFDT_ENV_H
4 /* 4 /*
5 * libfdt - Flat Device Tree manipulation 5 * libfdt - Flat Device Tree manipulation
6 * Copyright (C) 2006 David Gibson, IBM Corpor 6 * Copyright (C) 2006 David Gibson, IBM Corporation.
7 * Copyright 2012 Kim Phillips, Freescale Semi 7 * Copyright 2012 Kim Phillips, Freescale Semiconductor.
8 */ 8 */
9 9
10 #include <stdbool.h> 10 #include <stdbool.h>
11 #include <stddef.h> 11 #include <stddef.h>
12 #include <stdint.h> 12 #include <stdint.h>
13 #include <stdlib.h> 13 #include <stdlib.h>
14 #include <string.h> 14 #include <string.h>
15 #include <limits.h> 15 #include <limits.h>
16 16
17 #ifdef __CHECKER__ 17 #ifdef __CHECKER__
18 #define FDT_FORCE __attribute__((force)) 18 #define FDT_FORCE __attribute__((force))
19 #define FDT_BITWISE __attribute__((bitwise)) 19 #define FDT_BITWISE __attribute__((bitwise))
20 #else 20 #else
21 #define FDT_FORCE 21 #define FDT_FORCE
22 #define FDT_BITWISE 22 #define FDT_BITWISE
23 #endif 23 #endif
24 24
25 typedef uint16_t FDT_BITWISE fdt16_t; 25 typedef uint16_t FDT_BITWISE fdt16_t;
26 typedef uint32_t FDT_BITWISE fdt32_t; 26 typedef uint32_t FDT_BITWISE fdt32_t;
27 typedef uint64_t FDT_BITWISE fdt64_t; 27 typedef uint64_t FDT_BITWISE fdt64_t;
28 28
29 #define EXTRACT_BYTE(x, n) ((unsigned lon 29 #define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n])
30 #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) < 30 #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
31 #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) < 31 #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
32 (EXTRACT_BYTE(x, 2) < 32 (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
33 #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) < 33 #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
34 (EXTRACT_BYTE(x, 2) < 34 (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
35 (EXTRACT_BYTE(x, 4) < 35 (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
36 (EXTRACT_BYTE(x, 6) < 36 (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
37 37
38 static inline uint16_t fdt16_to_cpu(fdt16_t x) 38 static inline uint16_t fdt16_to_cpu(fdt16_t x)
39 { 39 {
40 return (FDT_FORCE uint16_t)CPU_TO_FDT1 40 return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
41 } 41 }
42 static inline fdt16_t cpu_to_fdt16(uint16_t x) 42 static inline fdt16_t cpu_to_fdt16(uint16_t x)
43 { 43 {
44 return (FDT_FORCE fdt16_t)CPU_TO_FDT16 44 return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
45 } 45 }
46 46
47 static inline uint32_t fdt32_to_cpu(fdt32_t x) 47 static inline uint32_t fdt32_to_cpu(fdt32_t x)
48 { 48 {
49 return (FDT_FORCE uint32_t)CPU_TO_FDT3 49 return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
50 } 50 }
51 static inline fdt32_t cpu_to_fdt32(uint32_t x) 51 static inline fdt32_t cpu_to_fdt32(uint32_t x)
52 { 52 {
53 return (FDT_FORCE fdt32_t)CPU_TO_FDT32 53 return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
54 } 54 }
55 55
56 static inline uint64_t fdt64_to_cpu(fdt64_t x) 56 static inline uint64_t fdt64_to_cpu(fdt64_t x)
57 { 57 {
58 return (FDT_FORCE uint64_t)CPU_TO_FDT6 58 return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
59 } 59 }
60 static inline fdt64_t cpu_to_fdt64(uint64_t x) 60 static inline fdt64_t cpu_to_fdt64(uint64_t x)
61 { 61 {
62 return (FDT_FORCE fdt64_t)CPU_TO_FDT64 62 return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
63 } 63 }
64 #undef CPU_TO_FDT64 64 #undef CPU_TO_FDT64
65 #undef CPU_TO_FDT32 65 #undef CPU_TO_FDT32
66 #undef CPU_TO_FDT16 66 #undef CPU_TO_FDT16
67 #undef EXTRACT_BYTE 67 #undef EXTRACT_BYTE
68 68
69 #ifdef __APPLE__ 69 #ifdef __APPLE__
70 #include <AvailabilityMacros.h> 70 #include <AvailabilityMacros.h>
71 71
72 /* strnlen() is not available on Mac OS < 10.7 72 /* strnlen() is not available on Mac OS < 10.7 */
73 # if !defined(MAC_OS_X_VERSION_10_7) || (MAC_O 73 # if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
74 MAC_O 74 MAC_OS_X_VERSION_10_7)
75 75
76 #define strnlen fdt_strnlen 76 #define strnlen fdt_strnlen
77 77
78 /* 78 /*
79 * fdt_strnlen: returns the length of a string 79 * fdt_strnlen: returns the length of a string or max_count - which ever is
80 * smallest. 80 * smallest.
81 * Input 1 string: the string whose size is to 81 * Input 1 string: the string whose size is to be determined
82 * Input 2 max_count: the maximum value return 82 * Input 2 max_count: the maximum value returned by this function
83 * Output: length of the string or max_count ( 83 * Output: length of the string or max_count (the smallest of the two)
84 */ 84 */
85 static inline size_t fdt_strnlen(const char *s 85 static inline size_t fdt_strnlen(const char *string, size_t max_count)
86 { 86 {
87 const char *p = memchr(string, 0, max_coun 87 const char *p = memchr(string, 0, max_count);
88 return p ? p - string : max_count; 88 return p ? p - string : max_count;
89 } 89 }
90 90
91 #endif /* !defined(MAC_OS_X_VERSION_10_7) || ( 91 #endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
92 MAC_OS_X_VERSION_10_7) */ 92 MAC_OS_X_VERSION_10_7) */
93 93
94 #endif /* __APPLE__ */ 94 #endif /* __APPLE__ */
95 95
96 #endif /* LIBFDT_ENV_H */ 96 #endif /* LIBFDT_ENV_H */
97 97
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