1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef UFDT_TYPES_H
18 #define UFDT_TYPES_H
19
20 #include <libfdt.h>
21
22 /* it has type : struct ufdt_node** */
23 #define for_each(it, node) \
24 if ((node) != NULL) \
25 for (it = (node)->nodes; it != (node)->nodes + (node)->mem_size; ++it) \
26 if (*it)
27
28 #define for_each_child(it, node) \
29 if (tag_of(node) == FDT_BEGIN_NODE) \
30 for ((it) = &(((struct fdt_node_ufdt_node *)node)->child); *it; \
31 it = &((*it)->sibling))
32
33 #define for_each_prop(it, node) \
34 for_each_child(it, node) if (tag_of(*it) == FDT_PROP)
35
36 #define for_each_node(it, node) \
37 for_each_child(it, node) if (tag_of(*it) == FDT_BEGIN_NODE)
38
39 /*
40 * Gets prop name from FDT requires complicated manipulation.
41 * To avoid the manipulation, the *name pointer in fdt_prop_ufdt_node
42 * is pointed to the final destination of the prop name in FDT.
43 * For the FDT_BEGIN_NODE name, it can be obtained from FDT directly.
44 */
45 #define name_of(node) \
46 ((tag_of(node) == FDT_BEGIN_NODE) \
47 ? (((const struct fdt_node_header *)((node)->fdt_tag_ptr))->name) \
48 : (((const struct fdt_prop_ufdt_node *)node)->name))
49
50 struct ufdt_node {
51 fdt32_t *fdt_tag_ptr;
52 struct ufdt_node *sibling;
53 };
54
55 struct fdt_prop_ufdt_node {
56 struct ufdt_node parent;
57 const char *name;
58 };
59
60 struct fdt_node_ufdt_node {
61 struct ufdt_node parent;
62 struct ufdt_node *child;
63 struct ufdt_node **last_child_p;
64 };
65
66 struct phandle_table_entry {
67 uint32_t phandle;
68 struct ufdt_node *node;
69 };
70
71 struct static_phandle_table {
72 int len;
73 struct phandle_table_entry *data;
74 };
75
76 struct ufdt {
77 void **fdtps;
78 int mem_size_fdtps;
79 int num_used_fdtps;
80
81 struct ufdt_node *root;
82 struct static_phandle_table phandle_table;
83 };
84
85 typedef void func_on_ufdt_node(struct ufdt_node *, void *);
86
87 struct ufdt_node_closure {
88 func_on_ufdt_node *func;
89 void *env;
90 };
91
tag_of(const struct ufdt_node * node)92 static uint32_t tag_of(const struct ufdt_node *node) {
93 if (!node) return FDT_END;
94 return fdt32_to_cpu(*node->fdt_tag_ptr);
95 }
96
97 #endif /* UFDT_TYPES_H */
98