PageRenderTime 33ms CodeModel.GetById 19ms app.highlight 8ms RepoModel.GetById 2ms app.codeStats 0ms

/scripts/dtc/libfdt/libfdt_env.h

http://github.com/mirrors/linux
C Header | 96 lines | 67 code | 14 blank | 15 comment | 2 complexity | 419a078b45c0ae0a0b7929536db9edf8 MD5 | raw file
 1/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
 2#ifndef LIBFDT_ENV_H
 3#define LIBFDT_ENV_H
 4/*
 5 * libfdt - Flat Device Tree manipulation
 6 * Copyright (C) 2006 David Gibson, IBM Corporation.
 7 * Copyright 2012 Kim Phillips, Freescale Semiconductor.
 8 */
 9
10#include <stdbool.h>
11#include <stddef.h>
12#include <stdint.h>
13#include <stdlib.h>
14#include <string.h>
15#include <limits.h>
16
17#ifdef __CHECKER__
18#define FDT_FORCE __attribute__((force))
19#define FDT_BITWISE __attribute__((bitwise))
20#else
21#define FDT_FORCE
22#define FDT_BITWISE
23#endif
24
25typedef uint16_t FDT_BITWISE fdt16_t;
26typedef uint32_t FDT_BITWISE fdt32_t;
27typedef uint64_t FDT_BITWISE fdt64_t;
28
29#define EXTRACT_BYTE(x, n)	((unsigned long long)((uint8_t *)&x)[n])
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) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
32			 (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
33#define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
34			 (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
35			 (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
36			 (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
37
38static inline uint16_t fdt16_to_cpu(fdt16_t x)
39{
40	return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
41}
42static inline fdt16_t cpu_to_fdt16(uint16_t x)
43{
44	return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
45}
46
47static inline uint32_t fdt32_to_cpu(fdt32_t x)
48{
49	return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
50}
51static inline fdt32_t cpu_to_fdt32(uint32_t x)
52{
53	return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
54}
55
56static inline uint64_t fdt64_to_cpu(fdt64_t x)
57{
58	return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
59}
60static inline fdt64_t cpu_to_fdt64(uint64_t x)
61{
62	return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
63}
64#undef CPU_TO_FDT64
65#undef CPU_TO_FDT32
66#undef CPU_TO_FDT16
67#undef EXTRACT_BYTE
68
69#ifdef __APPLE__
70#include <AvailabilityMacros.h>
71
72/* strnlen() is not available on Mac OS < 10.7 */
73# if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
74                                         MAC_OS_X_VERSION_10_7)
75
76#define strnlen fdt_strnlen
77
78/*
79 * fdt_strnlen: returns the length of a string or max_count - which ever is
80 * smallest.
81 * Input 1 string: the string whose size is to be determined
82 * Input 2 max_count: the maximum value returned by this function
83 * Output: length of the string or max_count (the smallest of the two)
84 */
85static inline size_t fdt_strnlen(const char *string, size_t max_count)
86{
87    const char *p = memchr(string, 0, max_count);
88    return p ? p - string : max_count;
89}
90
91#endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
92          MAC_OS_X_VERSION_10_7) */
93
94#endif /* __APPLE__ */
95
96#endif /* LIBFDT_ENV_H */