libfdt_env.h 4.9 KB

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  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. #include <plat/string.h>
  55. #include <sbi/sbi_types.h>
  56. #define INT_MAX ((int)(~0U >> 1))
  57. #define UINT_MAX ((unsigned int)~0U)
  58. #include <stddef.h>
  59. #ifdef __CHECKER__
  60. #define FDT_FORCE __attribute__((force))
  61. #define FDT_BITWISE __attribute__((bitwise))
  62. #else
  63. #define FDT_FORCE
  64. #define FDT_BITWISE
  65. #endif
  66. typedef uint16_t FDT_BITWISE fdt16_t;
  67. typedef uint32_t FDT_BITWISE fdt32_t;
  68. typedef uint64_t FDT_BITWISE fdt64_t;
  69. #define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n])
  70. #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
  71. #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
  72. (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
  73. #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
  74. (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
  75. (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
  76. (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
  77. static inline uint16_t fdt16_to_cpu(fdt16_t x)
  78. {
  79. return (FDT_FORCE uint16_t)CPU_TO_FDT16(x);
  80. }
  81. static inline fdt16_t cpu_to_fdt16(uint16_t x)
  82. {
  83. return (FDT_FORCE fdt16_t)CPU_TO_FDT16(x);
  84. }
  85. static inline uint32_t fdt32_to_cpu(fdt32_t x)
  86. {
  87. return (FDT_FORCE uint32_t)CPU_TO_FDT32(x);
  88. }
  89. static inline fdt32_t cpu_to_fdt32(uint32_t x)
  90. {
  91. return (FDT_FORCE fdt32_t)CPU_TO_FDT32(x);
  92. }
  93. static inline uint64_t fdt64_to_cpu(fdt64_t x)
  94. {
  95. return (FDT_FORCE uint64_t)CPU_TO_FDT64(x);
  96. }
  97. static inline fdt64_t cpu_to_fdt64(uint64_t x)
  98. {
  99. return (FDT_FORCE fdt64_t)CPU_TO_FDT64(x);
  100. }
  101. #undef CPU_TO_FDT64
  102. #undef CPU_TO_FDT32
  103. #undef CPU_TO_FDT16
  104. #undef EXTRACT_BYTE
  105. #ifdef __APPLE__
  106. #include <AvailabilityMacros.h>
  107. /* strnlen() is not available on Mac OS < 10.7 */
  108. # if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
  109. MAC_OS_X_VERSION_10_7)
  110. #define strnlen fdt_strnlen
  111. /*
  112. * fdt_strnlen: returns the length of a string or max_count - which ever is
  113. * smallest.
  114. * Input 1 string: the string whose size is to be determined
  115. * Input 2 max_count: the maximum value returned by this function
  116. * Output: length of the string or max_count (the smallest of the two)
  117. */
  118. static inline size_t fdt_strnlen(const char *string, size_t max_count)
  119. {
  120. const char *p = memchr(string, 0, max_count);
  121. return p ? p - string : max_count;
  122. }
  123. #endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
  124. MAC_OS_X_VERSION_10_7) */
  125. #endif /* __APPLE__ */
  126. #endif /* LIBFDT_ENV_H */