aboutsummaryrefslogtreecommitdiff
path: root/include/libfdt.h
blob: 340e89d9ce535a5fa72f60a6296841187be6fe9d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*
 * libfdt - Flat Device Tree manipulation
 * Copyright (C) 2006 David Gibson, IBM Corporation.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef _LIBFDT_H
#define _LIBFDT_H

#include <fdt.h>
#include <libfdt_env.h>

#define FDT_FIRST_SUPPORTED_VERSION	0x10
#define FDT_LAST_SUPPORTED_VERSION	0x11

/* Error codes: informative error codes */
#define FDT_ERR_NOTFOUND	1
#define FDT_ERR_EXISTS		2
#define FDT_ERR_NOSPACE		3

/* Error codes: codes for bad parameters */
#define FDT_ERR_BADOFFSET	4
#define FDT_ERR_BADPATH		5
#define FDT_ERR_BADSTATE	6

/* Error codes: codes for bad device tree blobs */
#define FDT_ERR_TRUNCATED	7
#define FDT_ERR_BADMAGIC	8
#define FDT_ERR_BADVERSION	9
#define FDT_ERR_BADSTRUCTURE	10
#define FDT_ERR_BADLAYOUT	11

#define FDT_ERR_MAX		11

#define fdt_get_header(fdt, field) \
	(fdt32_to_cpu(((struct fdt_header *)(fdt))->field))
#define fdt_magic(fdt)			(fdt_get_header(fdt, magic))
#define fdt_totalsize(fdt)		(fdt_get_header(fdt, totalsize))
#define fdt_off_dt_struct(fdt)		(fdt_get_header(fdt, off_dt_struct))
#define fdt_off_dt_strings(fdt)		(fdt_get_header(fdt, off_dt_strings))
#define fdt_off_mem_rsvmap(fdt)		(fdt_get_header(fdt, off_mem_rsvmap))
#define fdt_version(fdt)		(fdt_get_header(fdt, version))
#define fdt_last_comp_version(fdt)	(fdt_get_header(fdt, last_comp_version))
#define fdt_boot_cpuid_phys(fdt)	(fdt_get_header(fdt, boot_cpuid_phys))
#define fdt_size_dt_strings(fdt)	(fdt_get_header(fdt, size_dt_strings))
#define fdt_size_dt_struct(fdt)		(fdt_get_header(fdt, size_dt_struct))

#define fdt_set_header(fdt, field, val) \
	((struct fdt_header *)(fdt))->field = cpu_to_fdt32(val)

int fdt_check_header(const void *fdt);

void *fdt_offset_ptr(const void *fdt, int offset, int checklen);

#define fdt_offset_ptr_typed(fdt, offset, var) \
	((typeof(var))(fdt_offset_ptr((fdt), (offset), sizeof(*(var)))))

int fdt_move(const void *fdt, void *buf, int bufsize);

/* Read-only functions */
char *fdt_string(const void *fdt, int stroffset);

int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
			       const char *name, int namelen);
int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);

int fdt_find_node_by_path(const void *fdt, const char *path);
int fdt_find_node_by_type(const void *fdt, int nodeoffset, const char *type);

int fdt_node_is_compatible(const void *fdt, int nodeoffset,
			   const char *compat);
int fdt_find_compatible_node(const void *fdt, int nodeoffset,
			     const char *type, const char *compat);

struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset,
				      const char *name, int *lenp);
void *fdt_getprop(const void *fdt, int nodeoffset,
		  const char *name, int *lenp);

uint32_t fdt_next_tag(const void *fdt, int offset,
		      int *nextoffset, char **namep);
int fdt_num_reservemap(void *fdt, int *used, int *total);
int fdt_get_reservemap(void *fdt, int n, struct fdt_reserve_entry *re);

/* Write-in-place functions */
int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
			const void *val, int len);

#define fdt_setprop_inplace_typed(fdt, nodeoffset, name, val) \
	({ \
		typeof(val) x = val; \
		fdt_setprop_inplace(fdt, nodeoffset, name, &x, sizeof(x)); \
	})

int fdt_nop_property(void *fdt, int nodeoffset, const char *name);
int fdt_nop_node(void *fdt, int nodeoffset);
int fdt_insert_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size);


/* Sequential-write functions */
int fdt_create(void *buf, int bufsize);
int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size);
int fdt_finish_reservemap(void *fdt);
int fdt_begin_node(void *fdt, const char *name);
int fdt_property(void *fdt, const char *name, const void *val, int len);
#define fdt_property_typed(fdt, name, val) \
	({ \
		typeof(val) x = (val); \
		fdt_property((fdt), (name), &x, sizeof(x)); \
	})
#define fdt_property_string(fdt, name, str) \
	fdt_property(fdt, name, str, strlen(str)+1)
int fdt_end_node(void *fdt);
int fdt_finish(void *fdt);
int fdt_replace_reservemap_entry(void *fdt, int n, uint64_t addr, uint64_t size);

/* Read-write functions */
int fdt_open_into(void *fdt, void *buf, int bufsize);
int fdt_pack(void *fdt);

int fdt_setprop(void *fdt, int nodeoffset, const char *name,
		const void *val, int len);
#define fdt_setprop_typed(fdt, nodeoffset, name, val) \
	({ \
		typeof(val) x = (val); \
		fdt_setprop((fdt), (nodeoffset), (name), &x, sizeof(x)); \
	})
#define fdt_setprop_string(fdt, nodeoffset, name, str) \
	fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
int fdt_delprop(void *fdt, int nodeoffset, const char *name);
int fdt_add_subnode_namelen(void *fdt, int parentoffset,
			    const char *name, int namelen);
int fdt_add_subnode(void *fdt, int parentoffset, const char *name);
int fdt_del_node(void *fdt, int nodeoffset);

/* Extra functions */
const char *fdt_strerror(int errval);

#endif /* _LIBFDT_H */