scripts/dtc/libfdt/fdt.h

   1 /* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
   2 #ifndef FDT_H
   3 #define FDT_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 #ifndef __ASSEMBLY__
  11
  12 struct fdt_header {
  13         fdt32_t magic;                   /* magic word FDT_MAGIC */
  14         fdt32_t totalsize;               /* total size of DT block */
  15         fdt32_t off_dt_struct;           /* offset to structure */
  16         fdt32_t off_dt_strings;          /* offset to strings */
  17         fdt32_t off_mem_rsvmap;          /* offset to memory reserve map */
  18         fdt32_t version;                 /* format version */
  19         fdt32_t last_comp_version;       /* last compatible version */
  20
  21         /* version 2 fields below */
  22         fdt32_t boot_cpuid_phys;         /* Which physical CPU id we're
  23                                             booting on */
  24         /* version 3 fields below */
  25         fdt32_t size_dt_strings;         /* size of the strings block */
  26
  27         /* version 17 fields below */
  28         fdt32_t size_dt_struct;          /* size of the structure block */
  29 };
  30
  31 struct fdt_reserve_entry {
  32         fdt64_t address;
  33         fdt64_t size;
  34 };
  35
  36 struct fdt_node_header {
  37         fdt32_t tag;
  38         char name[0];
  39 };
  40
  41 struct fdt_property {
  42         fdt32_t tag;
  43         fdt32_t len;
  44         fdt32_t nameoff;
  45         char data[0];
  46 };
  47
  48 #endif /* !__ASSEMBLY */
  49
  50 #define FDT_MAGIC       0xd00dfeed      /* 4: version, 4: total size */
  51 #define FDT_TAGSIZE     sizeof(fdt32_t)
  52
  53 #define FDT_BEGIN_NODE  0x1             /* Start node: full name */
  54 #define FDT_END_NODE    0x2             /* End node */
  55 #define FDT_PROP        0x3             /* Property: name off,
  56                                            size, content */
  57 #define FDT_NOP         0x4             /* nop */
  58 #define FDT_END         0x9
  59
  60 #define FDT_V1_SIZE     (7*sizeof(fdt32_t))
  61 #define FDT_V2_SIZE     (FDT_V1_SIZE + sizeof(fdt32_t))
  62 #define FDT_V3_SIZE     (FDT_V2_SIZE + sizeof(fdt32_t))
  63 #define FDT_V16_SIZE    FDT_V3_SIZE
  64 #define FDT_V17_SIZE    (FDT_V16_SIZE + sizeof(fdt32_t))
  65
  66 #endif /* FDT_H */