EmbeddedPkg/Include/fdt.h

   1 /** @file
   2 *
   3 *  Copyright (c) 2011-2012, ARM Limited. All rights reserved.
   4 *
   5 *  This program and the accompanying materials
   6 *  are licensed and made available under the terms and conditions of the BSD License
   7 *  which accompanies this distribution.  The full text of the license may be found at
   8 *  http://opensource.org/licenses/bsd-license.php
   9 *
  10 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 *
  13 **/
  14
  15 #ifndef _FDT_H
  16 #define _FDT_H
  17
  18 #ifndef __ASSEMBLY__
  19
  20 struct fdt_header {
  21         uint32_t magic;                  /* magic word FDT_MAGIC */
  22         uint32_t totalsize;              /* total size of DT block */
  23         uint32_t off_dt_struct;          /* offset to structure */
  24         uint32_t off_dt_strings;         /* offset to strings */
  25         uint32_t off_mem_rsvmap;         /* offset to memory reserve map */
  26         uint32_t version;                /* format version */
  27         uint32_t last_comp_version;      /* last compatible version */
  28
  29         /* version 2 fields below */
  30         uint32_t boot_cpuid_phys;        /* Which physical CPU id we're
  31                                             booting on */
  32         /* version 3 fields below */
  33         uint32_t size_dt_strings;        /* size of the strings block */
  34
  35         /* version 17 fields below */
  36         uint32_t size_dt_struct;         /* size of the structure block */
  37 };
  38
  39 struct fdt_reserve_entry {
  40         uint64_t address;
  41         uint64_t size;
  42 };
  43
  44 struct fdt_node_header {
  45         uint32_t tag;
  46         char name[0];
  47 };
  48
  49 struct fdt_property {
  50         uint32_t tag;
  51         uint32_t len;
  52         uint32_t nameoff;
  53         char data[0];
  54 };
  55
  56 #endif /* !__ASSEMBLY */
  57
  58 #define FDT_MAGIC       0xd00dfeed      /* 4: version, 4: total size */
  59 #define FDT_TAGSIZE     sizeof(uint32_t)
  60
  61 #define FDT_BEGIN_NODE  0x1             /* Start node: full name */
  62 #define FDT_END_NODE    0x2             /* End node */
  63 #define FDT_PROP        0x3             /* Property: name off,
  64                                            size, content */
  65 #define FDT_NOP         0x4             /* nop */
  66 #define FDT_END         0x9
  67
  68 #define FDT_V1_SIZE     (7*sizeof(uint32_t))
  69 #define FDT_V2_SIZE     (FDT_V1_SIZE + sizeof(uint32_t))
  70 #define FDT_V3_SIZE     (FDT_V2_SIZE + sizeof(uint32_t))
  71 #define FDT_V16_SIZE    FDT_V3_SIZE
  72 #define FDT_V17_SIZE    (FDT_V16_SIZE + sizeof(uint32_t))
  73
  74 #endif /* _FDT_H */