include/fdt.h

   1 /*
   2  * libfdt - Flat Device Tree manipulation
   3  * Copyright (C) 2006 David Gibson, IBM Corporation.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public License
   7  * as published by the Free Software Foundation; either version 2.1 of
   8  * the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 #ifndef _FDT_H
  21 #define _FDT_H
  22
  23 #ifndef __ASSEMBLY__
  24
  25 struct fdt_header {
  26         uint32_t magic;                  /* magic word FDT_MAGIC */
  27         uint32_t totalsize;              /* total size of DT block */
  28         uint32_t off_dt_struct;          /* offset to structure */
  29         uint32_t off_dt_strings;         /* offset to strings */
  30         uint32_t off_mem_rsvmap;         /* offset to memory reserve map */
  31         uint32_t version;                /* format version */
  32         uint32_t last_comp_version;      /* last compatible version */
  33
  34         /* version 2 fields below */
  35         uint32_t boot_cpuid_phys;        /* Which physical CPU id we're
  36                                             booting on */
  37         /* version 3 fields below */
  38         uint32_t size_dt_strings;        /* size of the strings block */
  39
  40         /* version 17 fields below */
  41         uint32_t size_dt_struct;         /* size of the structure block */
  42 };
  43
  44 struct fdt_reserve_entry {
  45         uint64_t address;
  46         uint64_t size;
  47 };
  48
  49 struct fdt_node_header {
  50         uint32_t tag;
  51         char name[0];
  52 };
  53
  54 struct fdt_property {
  55         uint32_t tag;
  56         uint32_t len;
  57         uint32_t nameoff;
  58         char data[0];
  59 };
  60
  61 #endif /* !__ASSEMBLY */
  62
  63 #define FDT_MAGIC       0xd00dfeed      /* 4: version, 4: total size */
  64 #define FDT_TAGSIZE     sizeof(uint32_t)
  65
  66 #define FDT_BEGIN_NODE  0x1             /* Start node: full name */
  67 #define FDT_END_NODE    0x2             /* End node */
  68 #define FDT_PROP        0x3             /* Property: name off,
  69                                            size, content */
  70 #define FDT_NOP         0x4             /* nop */
  71 #define FDT_END         0x9
  72
  73 #define FDT_V1_SIZE     (7*sizeof(uint32_t))
  74 #define FDT_V2_SIZE     (FDT_V1_SIZE + sizeof(uint32_t))
  75 #define FDT_V3_SIZE     (FDT_V2_SIZE + sizeof(uint32_t))
  76 #define FDT_V16_SIZE    FDT_V3_SIZE
  77 #define FDT_V17_SIZE    (FDT_V16_SIZE + sizeof(uint32_t))
  78
  79 #endif /* _FDT_H */