projects/linux·blob master · refs

235 lines · 6.3 KiB

1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * (C) Copyright Linaro, Ltd. 2018
4 * (C) Copyright Arm Holdings. 2017
5 * (C) Copyright David Gibson <[email protected]>, IBM Corporation. 2005.
6 */
7
8#include <stdlib.h>
9#include <yaml.h>
10#include "dtc.h"
11#include "srcpos.h"
12
13char *yaml_error_name[] = {
14 [YAML_NO_ERROR] = "no error",
15 [YAML_MEMORY_ERROR] = "memory error",
16 [YAML_READER_ERROR] = "reader error",
17 [YAML_SCANNER_ERROR] = "scanner error",
18 [YAML_PARSER_ERROR] = "parser error",
19 [YAML_COMPOSER_ERROR] = "composer error",
20 [YAML_WRITER_ERROR] = "writer error",
21 [YAML_EMITTER_ERROR] = "emitter error",
22};
23
24#define yaml_emitter_emit_or_die(emitter, event) ( \
25{ \
26 if (!yaml_emitter_emit(emitter, event)) \
27 die("yaml '%s': %s in %s, line %i\n", \
28 yaml_error_name[(emitter)->error], \
29 (emitter)->problem, __func__, __LINE__); \
30})
31
32static void yaml_propval_int(yaml_emitter_t *emitter, struct marker *markers,
33 char *data, unsigned int seq_offset, unsigned int len, int width)
34{
35 yaml_event_t event;
36 void *tag;
37 unsigned int off;
38
39 switch(width) {
40 case 1: tag = "!u8"; break;
41 case 2: tag = "!u16"; break;
42 case 4: tag = "!u32"; break;
43 case 8: tag = "!u64"; break;
44 default:
45 die("Invalid width %i", width);
46 }
47 assert(len % width == 0);
48
49 yaml_sequence_start_event_initialize(&event, NULL,
50 (yaml_char_t *)tag, width == 4, YAML_FLOW_SEQUENCE_STYLE);
51 yaml_emitter_emit_or_die(emitter, &event);
52
53 for (off = 0; off < len; off += width) {
54 char buf[32];
55 struct marker *m;
56 bool is_phandle = false;
57
58 switch(width) {
59 case 1:
60 sprintf(buf, "0x%"PRIx8, *(uint8_t*)(data + off));
61 break;
62 case 2:
63 sprintf(buf, "0x%"PRIx16, dtb_ld16(data + off));
64 break;
65 case 4:
66 sprintf(buf, "0x%"PRIx32, dtb_ld32(data + off));
67 m = markers;
68 is_phandle = false;
69 for_each_marker_of_type(m, REF_PHANDLE) {
70 if (m->offset == (seq_offset + off)) {
71 is_phandle = true;
72 break;
73 }
74 }
75 break;
76 case 8:
77 sprintf(buf, "0x%"PRIx64, dtb_ld64(data + off));
78 break;
79 }
80
81 if (is_phandle)
82 yaml_scalar_event_initialize(&event, NULL,
83 (yaml_char_t*)"!phandle", (yaml_char_t *)buf,
84 strlen(buf), 0, 0, YAML_PLAIN_SCALAR_STYLE);
85 else
86 yaml_scalar_event_initialize(&event, NULL,
87 (yaml_char_t*)YAML_INT_TAG, (yaml_char_t *)buf,
88 strlen(buf), 1, 1, YAML_PLAIN_SCALAR_STYLE);
89 yaml_emitter_emit_or_die(emitter, &event);
90 }
91
92 yaml_sequence_end_event_initialize(&event);
93 yaml_emitter_emit_or_die(emitter, &event);
94}
95
96static void yaml_propval_string(yaml_emitter_t *emitter, char *str, int len)
97{
98 yaml_event_t event;
99 int i;
100
101 assert(str[len-1] == '\0');
102
103 /* Make sure the entire string is in the lower 7-bit ascii range */
104 for (i = 0; i < len; i++)
105 assert(isascii(str[i]));
106
107 yaml_scalar_event_initialize(&event, NULL,
108 (yaml_char_t *)YAML_STR_TAG, (yaml_char_t*)str,
109 len-1, 0, 1, YAML_DOUBLE_QUOTED_SCALAR_STYLE);
110 yaml_emitter_emit_or_die(emitter, &event);
111}
112
113static void yaml_propval(yaml_emitter_t *emitter, struct property *prop)
114{
115 yaml_event_t event;
116 unsigned int len = prop->val.len;
117 struct marker *m = prop->val.markers;
118 struct marker *markers = prop->val.markers;
119
120 /* Emit the property name */
121 yaml_scalar_event_initialize(&event, NULL,
122 (yaml_char_t *)YAML_STR_TAG, (yaml_char_t*)prop->name,
123 strlen(prop->name), 1, 1, YAML_PLAIN_SCALAR_STYLE);
124 yaml_emitter_emit_or_die(emitter, &event);
125
126 /* Boolean properties are easiest to deal with. Length is zero, so just emit 'true' */
127 if (len == 0) {
128 yaml_scalar_event_initialize(&event, NULL,
129 (yaml_char_t *)YAML_BOOL_TAG,
130 (yaml_char_t*)"true",
131 strlen("true"), 1, 0, YAML_PLAIN_SCALAR_STYLE);
132 yaml_emitter_emit_or_die(emitter, &event);
133 return;
134 }
135
136 if (!m)
137 die("No markers present in property '%s' value\n", prop->name);
138
139 yaml_sequence_start_event_initialize(&event, NULL,
140 (yaml_char_t *)YAML_SEQ_TAG, 1, YAML_FLOW_SEQUENCE_STYLE);
141 yaml_emitter_emit_or_die(emitter, &event);
142
143 for_each_marker(m) {
144 int chunk_len;
145 char *data = &prop->val.val[m->offset];
146
147 if (m->type < TYPE_UINT8)
148 continue;
149
150 chunk_len = type_marker_length(m) ? : len;
151 assert(chunk_len > 0);
152 len -= chunk_len;
153
154 switch(m->type) {
155 case TYPE_UINT16:
156 yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 2);
157 break;
158 case TYPE_UINT32:
159 yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 4);
160 break;
161 case TYPE_UINT64:
162 yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 8);
163 break;
164 case TYPE_STRING:
165 yaml_propval_string(emitter, data, chunk_len);
166 break;
167 default:
168 yaml_propval_int(emitter, markers, data, m->offset, chunk_len, 1);
169 break;
170 }
171 }
172
173 yaml_sequence_end_event_initialize(&event);
174 yaml_emitter_emit_or_die(emitter, &event);
175}
176
177
178static void yaml_tree(struct node *tree, yaml_emitter_t *emitter)
179{
180 struct property *prop;
181 struct node *child;
182 yaml_event_t event;
183
184 if (tree->deleted)
185 return;
186
187 yaml_mapping_start_event_initialize(&event, NULL,
188 (yaml_char_t *)YAML_MAP_TAG, 1, YAML_ANY_MAPPING_STYLE);
189 yaml_emitter_emit_or_die(emitter, &event);
190
191 for_each_property(tree, prop)
192 yaml_propval(emitter, prop);
193
194 /* Loop over all the children, emitting them into the map */
195 for_each_child(tree, child) {
196 yaml_scalar_event_initialize(&event, NULL,
197 (yaml_char_t *)YAML_STR_TAG, (yaml_char_t*)child->name,
198 strlen(child->name), 1, 0, YAML_PLAIN_SCALAR_STYLE);
199 yaml_emitter_emit_or_die(emitter, &event);
200 yaml_tree(child, emitter);
201 }
202
203 yaml_mapping_end_event_initialize(&event);
204 yaml_emitter_emit_or_die(emitter, &event);
205}
206
207void dt_to_yaml(FILE *f, struct dt_info *dti)
208{
209 yaml_emitter_t emitter;
210 yaml_event_t event;
211
212 yaml_emitter_initialize(&emitter);
213 yaml_emitter_set_output_file(&emitter, f);
214 yaml_stream_start_event_initialize(&event, YAML_UTF8_ENCODING);
215 yaml_emitter_emit_or_die(&emitter, &event);
216
217 yaml_document_start_event_initialize(&event, NULL, NULL, NULL, 0);
218 yaml_emitter_emit_or_die(&emitter, &event);
219
220 yaml_sequence_start_event_initialize(&event, NULL, (yaml_char_t *)YAML_SEQ_TAG, 1, YAML_ANY_SEQUENCE_STYLE);
221 yaml_emitter_emit_or_die(&emitter, &event);
222
223 yaml_tree(dti->dt, &emitter);
224
225 yaml_sequence_end_event_initialize(&event);
226 yaml_emitter_emit_or_die(&emitter, &event);
227
228 yaml_document_end_event_initialize(&event, 0);
229 yaml_emitter_emit_or_die(&emitter, &event);
230
231 yaml_stream_end_event_initialize(&event);
232 yaml_emitter_emit_or_die(&emitter, &event);
233
234 yaml_emitter_delete(&emitter);
235}