xref: /linux/scripts/dtc/libfdt/fdt.h (revision 9a87ffc99ec8eb8d35eed7c4f816d75f5cc9662e)
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