projects/linux·blob v6.13 · refs

363 lines · 7.3 KiB

1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * (C) Copyright David Gibson <[email protected]>, IBM Corporation. 2005.
4 */
5
6#include "dtc.h"
7#include "srcpos.h"
8
9extern FILE *yyin;
10extern int yyparse(void);
11extern YYLTYPE yylloc;
12
13struct dt_info *parser_output;
14bool treesource_error;
15
16struct dt_info *dt_from_source(const char *fname)
17{
18 parser_output = NULL;
19 treesource_error = false;
20
21 srcfile_push(fname);
22 yyin = current_srcfile->f;
23 yylloc.file = current_srcfile;
24
25 if (yyparse() != 0)
26 die("Unable to parse input tree\n");
27
28 if (treesource_error)
29 die("Syntax error parsing input tree\n");
30
31 return parser_output;
32}
33
34static void write_prefix(FILE *f, int level)
35{
36 int i;
37
38 for (i = 0; i < level; i++)
39 fputc('\t', f);
40}
41
42static bool isstring(char c)
43{
44 return (isprint((unsigned char)c)
45 || (c == '\0')
46 || strchr("\a\b\t\n\v\f\r", c));
47}
48
49static void write_propval_string(FILE *f, const char *s, size_t len)
50{
51 const char *end = s + len - 1;
52
53 if (!len)
54 return;
55
56 assert(*end == '\0');
57
58 fprintf(f, "\"");
59 while (s < end) {
60 char c = *s++;
61 switch (c) {
62 case '\a':
63 fprintf(f, "\\a");
64 break;
65 case '\b':
66 fprintf(f, "\\b");
67 break;
68 case '\t':
69 fprintf(f, "\\t");
70 break;
71 case '\n':
72 fprintf(f, "\\n");
73 break;
74 case '\v':
75 fprintf(f, "\\v");
76 break;
77 case '\f':
78 fprintf(f, "\\f");
79 break;
80 case '\r':
81 fprintf(f, "\\r");
82 break;
83 case '\\':
84 fprintf(f, "\\\\");
85 break;
86 case '\"':
87 fprintf(f, "\\\"");
88 break;
89 case '\0':
90 fprintf(f, "\\0");
91 break;
92 default:
93 if (isprint((unsigned char)c))
94 fprintf(f, "%c", c);
95 else
96 fprintf(f, "\\x%02"PRIx8, c);
97 }
98 }
99 fprintf(f, "\"");
100}
101
102static void write_propval_int(FILE *f, const char *p, size_t len, size_t width)
103{
104 const char *end = p + len;
105 assert(len % width == 0);
106
107 for (; p < end; p += width) {
108 switch (width) {
109 case 1:
110 fprintf(f, "%02"PRIx8, *(const uint8_t*)p);
111 break;
112 case 2:
113 fprintf(f, "0x%02"PRIx16, dtb_ld16(p));
114 break;
115 case 4:
116 fprintf(f, "0x%02"PRIx32, dtb_ld32(p));
117 break;
118 case 8:
119 fprintf(f, "0x%02"PRIx64, dtb_ld64(p));
120 break;
121 }
122 if (p + width < end)
123 fputc(' ', f);
124 }
125}
126
127static const char *delim_start[] = {
128 [TYPE_UINT8] = "[",
129 [TYPE_UINT16] = "/bits/ 16 <",
130 [TYPE_UINT32] = "<",
131 [TYPE_UINT64] = "/bits/ 64 <",
132 [TYPE_STRING] = "",
133};
134static const char *delim_end[] = {
135 [TYPE_UINT8] = "]",
136 [TYPE_UINT16] = ">",
137 [TYPE_UINT32] = ">",
138 [TYPE_UINT64] = ">",
139 [TYPE_STRING] = "",
140};
141
142static void add_string_markers(struct property *prop)
143{
144 int l, len = prop->val.len;
145 const char *p = prop->val.val;
146
147 for (l = strlen(p) + 1; l < len; l += strlen(p + l) + 1) {
148 struct marker *m, **nextp;
149
150 m = xmalloc(sizeof(*m));
151 m->offset = l;
152 m->type = TYPE_STRING;
153 m->ref = NULL;
154 m->next = NULL;
155
156 /* Find the end of the markerlist */
157 nextp = &prop->val.markers;
158 while (*nextp)
159 nextp = &((*nextp)->next);
160 *nextp = m;
161 }
162}
163
164static enum markertype guess_value_type(struct property *prop)
165{
166 int len = prop->val.len;
167 const char *p = prop->val.val;
168 struct marker *m = prop->val.markers;
169 int nnotstring = 0, nnul = 0;
170 int nnotstringlbl = 0, nnotcelllbl = 0;
171 int i;
172
173 for (i = 0; i < len; i++) {
174 if (! isstring(p[i]))
175 nnotstring++;
176 if (p[i] == '\0')
177 nnul++;
178 }
179
180 for_each_marker_of_type(m, LABEL) {
181 if ((m->offset > 0) && (prop->val.val[m->offset - 1] != '\0'))
182 nnotstringlbl++;
183 if ((m->offset % sizeof(cell_t)) != 0)
184 nnotcelllbl++;
185 }
186
187 if ((p[len-1] == '\0') && (nnotstring == 0) && (nnul <= (len-nnul))
188 && (nnotstringlbl == 0)) {
189 if (nnul > 1)
190 add_string_markers(prop);
191 return TYPE_STRING;
192 } else if (((len % sizeof(cell_t)) == 0) && (nnotcelllbl == 0)) {
193 return TYPE_UINT32;
194 }
195
196 return TYPE_UINT8;
197}
198
199static void write_propval(FILE *f, struct property *prop)
200{
201 size_t len = prop->val.len;
202 struct marker *m = prop->val.markers;
203 struct marker dummy_marker;
204 enum markertype emit_type = TYPE_NONE;
205 char *srcstr;
206
207 if (len == 0) {
208 fprintf(f, ";");
209 if (annotate) {
210 srcstr = srcpos_string_first(prop->srcpos, annotate);
211 if (srcstr) {
212 fprintf(f, " /* %s */", srcstr);
213 free(srcstr);
214 }
215 }
216 fprintf(f, "\n");
217 return;
218 }
219
220 fprintf(f, " =");
221
222 if (!next_type_marker(m)) {
223 /* data type information missing, need to guess */
224 dummy_marker.type = guess_value_type(prop);
225 dummy_marker.next = prop->val.markers;
226 dummy_marker.offset = 0;
227 dummy_marker.ref = NULL;
228 m = &dummy_marker;
229 }
230
231 for_each_marker(m) {
232 size_t chunk_len = (m->next ? m->next->offset : len) - m->offset;
233 size_t data_len = type_marker_length(m) ? : len - m->offset;
234 const char *p = &prop->val.val[m->offset];
235 struct marker *m_phandle;
236
237 if (is_type_marker(m->type)) {
238 emit_type = m->type;
239 fprintf(f, " %s", delim_start[emit_type]);
240 } else if (m->type == LABEL)
241 fprintf(f, " %s:", m->ref);
242
243 if (emit_type == TYPE_NONE || chunk_len == 0)
244 continue;
245
246 switch(emit_type) {
247 case TYPE_UINT16:
248 write_propval_int(f, p, chunk_len, 2);
249 break;
250 case TYPE_UINT32:
251 m_phandle = prop->val.markers;
252 for_each_marker_of_type(m_phandle, REF_PHANDLE)
253 if (m->offset == m_phandle->offset)
254 break;
255
256 if (m_phandle) {
257 if (m_phandle->ref[0] == '/')
258 fprintf(f, "&{%s}", m_phandle->ref);
259 else
260 fprintf(f, "&%s", m_phandle->ref);
261 if (chunk_len > 4) {
262 fputc(' ', f);
263 write_propval_int(f, p + 4, chunk_len - 4, 4);
264 }
265 } else {
266 write_propval_int(f, p, chunk_len, 4);
267 }
268 if (data_len > chunk_len)
269 fputc(' ', f);
270 break;
271 case TYPE_UINT64:
272 write_propval_int(f, p, chunk_len, 8);
273 break;
274 case TYPE_STRING:
275 write_propval_string(f, p, chunk_len);
276 break;
277 default:
278 write_propval_int(f, p, chunk_len, 1);
279 }
280
281 if (chunk_len == data_len) {
282 size_t pos = m->offset + chunk_len;
283 fprintf(f, pos == len ? "%s" : "%s,",
284 delim_end[emit_type] ? : "");
285 emit_type = TYPE_NONE;
286 }
287 }
288 fprintf(f, ";");
289 if (annotate) {
290 srcstr = srcpos_string_first(prop->srcpos, annotate);
291 if (srcstr) {
292 fprintf(f, " /* %s */", srcstr);
293 free(srcstr);
294 }
295 }
296 fprintf(f, "\n");
297}
298
299static void write_tree_source_node(FILE *f, struct node *tree, int level)
300{
301 struct property *prop;
302 struct node *child;
303 struct label *l;
304 char *srcstr;
305
306 write_prefix(f, level);
307 for_each_label(tree->labels, l)
308 fprintf(f, "%s: ", l->label);
309 if (tree->name && (*tree->name))
310 fprintf(f, "%s {", tree->name);
311 else
312 fprintf(f, "/ {");
313
314 if (annotate) {
315 srcstr = srcpos_string_first(tree->srcpos, annotate);
316 if (srcstr) {
317 fprintf(f, " /* %s */", srcstr);
318 free(srcstr);
319 }
320 }
321 fprintf(f, "\n");
322
323 for_each_property(tree, prop) {
324 write_prefix(f, level+1);
325 for_each_label(prop->labels, l)
326 fprintf(f, "%s: ", l->label);
327 fprintf(f, "%s", prop->name);
328 write_propval(f, prop);
329 }
330 for_each_child(tree, child) {
331 fprintf(f, "\n");
332 write_tree_source_node(f, child, level+1);
333 }
334 write_prefix(f, level);
335 fprintf(f, "};");
336 if (annotate) {
337 srcstr = srcpos_string_last(tree->srcpos, annotate);
338 if (srcstr) {
339 fprintf(f, " /* %s */", srcstr);
340 free(srcstr);
341 }
342 }
343 fprintf(f, "\n");
344}
345
346void dt_to_source(FILE *f, struct dt_info *dti)
347{
348 struct reserve_info *re;
349
350 fprintf(f, "/dts-v1/;\n\n");
351
352 for (re = dti->reservelist; re; re = re->next) {
353 struct label *l;
354
355 for_each_label(re->labels, l)
356 fprintf(f, "%s: ", l->label);
357 fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n",
358 (unsigned long long)re->address,
359 (unsigned long long)re->size);
360 }
361
362 write_tree_source_node(f, dti->dt, 0);
363}