fdt.h 3.9 KB

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  1. #ifndef _FDT_H
  2. #define _FDT_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. #ifndef __ASSEMBLY__
  55. struct fdt_header {
  56. fdt32_t magic; /* magic word FDT_MAGIC */
  57. fdt32_t totalsize; /* total size of DT block */
  58. fdt32_t off_dt_struct; /* offset to structure */
  59. fdt32_t off_dt_strings; /* offset to strings */
  60. fdt32_t off_mem_rsvmap; /* offset to memory reserve map */
  61. fdt32_t version; /* format version */
  62. fdt32_t last_comp_version; /* last compatible version */
  63. /* version 2 fields below */
  64. fdt32_t boot_cpuid_phys; /* Which physical CPU id we're
  65. booting on */
  66. /* version 3 fields below */
  67. fdt32_t size_dt_strings; /* size of the strings block */
  68. /* version 17 fields below */
  69. fdt32_t size_dt_struct; /* size of the structure block */
  70. };
  71. struct fdt_reserve_entry {
  72. fdt64_t address;
  73. fdt64_t size;
  74. };
  75. struct fdt_node_header {
  76. fdt32_t tag;
  77. char name[0];
  78. };
  79. struct fdt_property {
  80. fdt32_t tag;
  81. fdt32_t len;
  82. fdt32_t nameoff;
  83. char data[0];
  84. };
  85. #endif /* !__ASSEMBLY */
  86. #define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */
  87. #define FDT_TAGSIZE sizeof(fdt32_t)
  88. #define FDT_BEGIN_NODE 0x1 /* Start node: full name */
  89. #define FDT_END_NODE 0x2 /* End node */
  90. #define FDT_PROP 0x3 /* Property: name off,
  91. size, content */
  92. #define FDT_NOP 0x4 /* nop */
  93. #define FDT_END 0x9
  94. #define FDT_V1_SIZE (7*sizeof(fdt32_t))
  95. #define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(fdt32_t))
  96. #define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(fdt32_t))
  97. #define FDT_V16_SIZE FDT_V3_SIZE
  98. #define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(fdt32_t))
  99. #endif /* _FDT_H */