LXR uboot/scripts/dtc/libfdt/libfdt

   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 */
  97