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[];
39 };
40
41 struct fdt_property {
42 fdt32_t tag;
43 fdt32_t len;
44 fdt32_t nameoff;
45 char data[];
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 */
67
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