libfdt_env.h 4.0 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 <stddef.h>
  55. #include <stdint.h>
  56. #include <stdlib.h>
  57. #include <string.h>
  58. #ifdef __CHECKER__
  59. #define __force __attribute__((force))
  60. #define __bitwise __attribute__((bitwise))
  61. #else
  62. #define __force
  63. #define __bitwise
  64. #endif
  65. typedef uint16_t __bitwise fdt16_t;
  66. typedef uint32_t __bitwise fdt32_t;
  67. typedef uint64_t __bitwise fdt64_t;
  68. #define EXTRACT_BYTE(x, n) ((unsigned long long)((uint8_t *)&x)[n])
  69. #define CPU_TO_FDT16(x) ((EXTRACT_BYTE(x, 0) << 8) | EXTRACT_BYTE(x, 1))
  70. #define CPU_TO_FDT32(x) ((EXTRACT_BYTE(x, 0) << 24) | (EXTRACT_BYTE(x, 1) << 16) | \
  71. (EXTRACT_BYTE(x, 2) << 8) | EXTRACT_BYTE(x, 3))
  72. #define CPU_TO_FDT64(x) ((EXTRACT_BYTE(x, 0) << 56) | (EXTRACT_BYTE(x, 1) << 48) | \
  73. (EXTRACT_BYTE(x, 2) << 40) | (EXTRACT_BYTE(x, 3) << 32) | \
  74. (EXTRACT_BYTE(x, 4) << 24) | (EXTRACT_BYTE(x, 5) << 16) | \
  75. (EXTRACT_BYTE(x, 6) << 8) | EXTRACT_BYTE(x, 7))
  76. static inline uint16_t fdt16_to_cpu(fdt16_t x)
  77. {
  78. return (__force uint16_t)CPU_TO_FDT16(x);
  79. }
  80. static inline fdt16_t cpu_to_fdt16(uint16_t x)
  81. {
  82. return (__force fdt16_t)CPU_TO_FDT16(x);
  83. }
  84. static inline uint32_t fdt32_to_cpu(fdt32_t x)
  85. {
  86. return (__force uint32_t)CPU_TO_FDT32(x);
  87. }
  88. static inline fdt32_t cpu_to_fdt32(uint32_t x)
  89. {
  90. return (__force fdt32_t)CPU_TO_FDT32(x);
  91. }
  92. static inline uint64_t fdt64_to_cpu(fdt64_t x)
  93. {
  94. return (__force uint64_t)CPU_TO_FDT64(x);
  95. }
  96. static inline fdt64_t cpu_to_fdt64(uint64_t x)
  97. {
  98. return (__force fdt64_t)CPU_TO_FDT64(x);
  99. }
  100. #undef CPU_TO_FDT64
  101. #undef CPU_TO_FDT32
  102. #undef CPU_TO_FDT16
  103. #undef EXTRACT_BYTE
  104. #endif /* _LIBFDT_ENV_H */