include/fdt.h

   1 #ifndef _FDT_H
   2 #define _FDT_H
   3
   4 #ifndef __ASSEMBLY__
   5
   6 struct fdt_header {
   7         fdt32_t magic;                   /* magic word FDT_MAGIC */
   8         fdt32_t totalsize;               /* total size of DT block */
   9         fdt32_t off_dt_struct;           /* offset to structure */
  10         fdt32_t off_dt_strings;          /* offset to strings */
  11         fdt32_t off_mem_rsvmap;          /* offset to memory reserve map */
  12         fdt32_t version;                 /* format version */
  13         fdt32_t last_comp_version;       /* last compatible version */
  14
  15         /* version 2 fields below */
  16         fdt32_t boot_cpuid_phys;         /* Which physical CPU id we're
  17                                             booting on */
  18         /* version 3 fields below */
  19         fdt32_t size_dt_strings;         /* size of the strings block */
  20
  21         /* version 17 fields below */
  22         fdt32_t size_dt_struct;          /* size of the structure block */
  23 };
  24
  25 struct fdt_reserve_entry {
  26         fdt64_t address;
  27         fdt64_t size;
  28 };
  29
  30 struct fdt_node_header {
  31         fdt32_t tag;
  32         char name[0];
  33 };
  34
  35 struct fdt_property {
  36         fdt32_t tag;
  37         fdt32_t len;
  38         fdt32_t nameoff;
  39         char data[0];
  40 };
  41
  42 #endif /* !__ASSEMBLY */
  43
  44 #define FDT_MAGIC       0xd00dfeed      /* 4: version, 4: total size */
  45 #define FDT_TAGSIZE     sizeof(fdt32_t)
  46
  47 #define FDT_BEGIN_NODE  0x1             /* Start node: full name */
  48 #define FDT_END_NODE    0x2             /* End node */
  49 #define FDT_PROP        0x3             /* Property: name off,
  50                                            size, content */
  51 #define FDT_NOP         0x4             /* nop */
  52 #define FDT_END         0x9
  53
  54 #define FDT_V1_SIZE     (7*sizeof(fdt32_t))
  55 #define FDT_V2_SIZE     (FDT_V1_SIZE + sizeof(fdt32_t))
  56 #define FDT_V3_SIZE     (FDT_V2_SIZE + sizeof(fdt32_t))
  57 #define FDT_V16_SIZE    FDT_V3_SIZE
  58 #define FDT_V17_SIZE    (FDT_V16_SIZE + sizeof(fdt32_t))
  59
  60 /* adding a ramdisk needs 0x44 bytes in version 2008.10 */
  61 #define FDT_RAMDISK_OVERHEAD    0x80
  62 #endif /* _FDT_H */