4 * libfdt - Flat Device Tree manipulation
5 * Copyright (C) 2006 David Gibson, IBM Corporation.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public License
9 * as published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <libfdt_env.h>
25 #define FDT_FIRST_SUPPORTED_VERSION 0x10
26 #define FDT_LAST_SUPPORTED_VERSION 0x11
28 /* Error codes: informative error codes */
29 #define FDT_ERR_NOTFOUND 1
30 #define FDT_ERR_EXISTS 2
31 #define FDT_ERR_NOSPACE 3
33 /* Error codes: codes for bad parameters */
34 #define FDT_ERR_BADOFFSET 4
35 #define FDT_ERR_BADPATH 5
36 #define FDT_ERR_BADSTATE 6
38 /* Error codes: codes for bad device tree blobs */
39 #define FDT_ERR_TRUNCATED 7
40 #define FDT_ERR_BADMAGIC 8
41 #define FDT_ERR_BADVERSION 9
42 #define FDT_ERR_BADSTRUCTURE 10
43 #define FDT_ERR_BADLAYOUT 11
45 #define FDT_ERR_MAX 11
47 #define fdt_get_header(fdt, field) \
48 (fdt32_to_cpu(((struct fdt_header *)(fdt))->field))
49 #define fdt_magic(fdt) (fdt_get_header(fdt, magic))
50 #define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize))
51 #define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct))
52 #define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings))
53 #define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap))
54 #define fdt_version(fdt) (fdt_get_header(fdt, version))
55 #define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version))
56 #define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys))
57 #define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings))
58 #define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct))
60 #define fdt_set_header(fdt, field, val) \
61 ((struct fdt_header *)(fdt))->field = cpu_to_fdt32(val)
63 void *fdt_offset_ptr(const void *fdt, int offset, int checklen);
65 #define fdt_offset_ptr_typed(fdt, offset, var) \
66 ((typeof(var))(fdt_offset_ptr((fdt), (offset), sizeof(*(var)))))
68 int fdt_move(const void *fdt, void *buf, int bufsize);
70 /* Read-only functions */
71 char *fdt_string(const void *fdt, int stroffset);
73 int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
74 const char *name, int namelen);
75 int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);
77 int fdt_path_offset(const void *fdt, const char *path);
79 struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset,
80 const char *name, int *lenp);
81 void *fdt_getprop(const void *fdt, int nodeoffset,
82 const char *name, int *lenp);
84 uint32_t fdt_next_tag(const void *fdt, int offset,
85 int *nextoffset, char **namep);
87 /* Write-in-place functions */
88 int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
89 const void *val, int len);
91 #define fdt_setprop_inplace_typed(fdt, nodeoffset, name, val) \
93 typeof(val) x = val; \
94 fdt_setprop_inplace(fdt, nodeoffset, name, &x, sizeof(x)); \
97 int fdt_nop_property(void *fdt, int nodeoffset, const char *name);
98 int fdt_nop_node(void *fdt, int nodeoffset);
100 /* Sequential-write functions */
101 int fdt_create(void *buf, int bufsize);
102 int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size);
103 int fdt_finish_reservemap(void *fdt);
104 int fdt_begin_node(void *fdt, const char *name);
105 int fdt_property(void *fdt, const char *name, const void *val, int len);
106 #define fdt_property_typed(fdt, name, val) \
108 typeof(val) x = (val); \
109 fdt_property((fdt), (name), &x, sizeof(x)); \
111 #define fdt_property_string(fdt, name, str) \
112 fdt_property(fdt, name, str, strlen(str)+1)
113 int fdt_end_node(void *fdt);
114 int fdt_finish(void *fdt);
116 /* Read-write functions */
117 int fdt_open_into(void *fdt, void *buf, int bufsize);
118 int fdt_pack(void *fdt);
120 int fdt_setprop(void *fdt, int nodeoffset, const char *name,
121 const void *val, int len);
122 #define fdt_setprop_typed(fdt, nodeoffset, name, val) \
124 typeof(val) x = (val); \
125 fdt_setprop((fdt), (nodeoffset), (name), &x, sizeof(x)); \
127 #define fdt_setprop_string(fdt, nodeoffset, name, str) \
128 fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
129 int fdt_delprop(void *fdt, int nodeoffset, const char *name);
130 int fdt_add_subnode_namelen(void *fdt, int parentoffset,
131 const char *name, int namelen);
132 int fdt_add_subnode(void *fdt, int parentoffset, const char *name);
133 int fdt_del_node(void *fdt, int nodeoffset);
135 /* Extra functions */
136 const char *fdt_strerror(int errval);
138 #endif /* _LIBFDT_H */