1 #ifndef _FDT_H
2 #define _FDT_H
3 /*
4 * libfdt - Flat Device Tree manipulation
5 * Copyright (C) 2006 David Gibson, IBM Corporation.
6 *
7 * libfdt is dual licensed: you can use it either under the terms of
8 * the GPL, or the BSD license, at your option.
9 *
10 * a) This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of the
13 * License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this library; if not, write to the Free
22 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
23 * MA 02110-1301 USA
24 *
25 * Alternatively,
26 *
27 * b) Redistribution and use in source and binary forms, with or
28 * without modification, are permitted provided that the following
29 * conditions are met:
30 *
31 * 1. Redistributions of source code must retain the above
32 * copyright notice, this list of conditions and the following
33 * disclaimer.
34 * 2. Redistributions in binary form must reproduce the above
35 * copyright notice, this list of conditions and the following
36 * disclaimer in the documentation and/or other materials
37 * provided with the distribution.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
40 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
41 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
42 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
43 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
44 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
49 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
50 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
51 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
52 */
54 #ifndef __ASSEMBLY__
56 struct fdt_header {
57 uint32_t magic; /* magic word FDT_MAGIC */
58 uint32_t totalsize; /* total size of DT block */
59 uint32_t off_dt_struct; /* offset to structure */
60 uint32_t off_dt_strings; /* offset to strings */
61 uint32_t off_mem_rsvmap; /* offset to memory reserve map */
62 uint32_t version; /* format version */
63 uint32_t last_comp_version; /* last compatible version */
65 /* version 2 fields below */
66 uint32_t boot_cpuid_phys; /* Which physical CPU id we're
67 booting on */
68 /* version 3 fields below */
69 uint32_t size_dt_strings; /* size of the strings block */
71 /* version 17 fields below */
72 uint32_t size_dt_struct; /* size of the structure block */
73 };
75 struct fdt_reserve_entry {
76 uint64_t address;
77 uint64_t size;
78 };
80 struct fdt_node_header {
81 uint32_t tag;
82 char name[0];
83 };
85 struct fdt_property {
86 uint32_t tag;
87 uint32_t len;
88 uint32_t nameoff;
89 char data[0];
90 };
92 #endif /* !__ASSEMBLY */
94 #define FDT_MAGIC 0xd00dfeed /* 4: version, 4: total size */
95 #define FDT_TAGSIZE sizeof(uint32_t)
97 #define FDT_BEGIN_NODE 0x1 /* Start node: full name */
98 #define FDT_END_NODE 0x2 /* End node */
99 #define FDT_PROP 0x3 /* Property: name off,
100 size, content */
101 #define FDT_NOP 0x4 /* nop */
102 #define FDT_END 0x9
104 #define FDT_V1_SIZE (7*sizeof(uint32_t))
105 #define FDT_V2_SIZE (FDT_V1_SIZE + sizeof(uint32_t))
106 #define FDT_V3_SIZE (FDT_V2_SIZE + sizeof(uint32_t))
107 #define FDT_V16_SIZE FDT_V3_SIZE
108 #define FDT_V17_SIZE (FDT_V16_SIZE + sizeof(uint32_t))
110 #endif /* _FDT_H */