This source file includes following definitions.
- yyerror
1
2
3
4
5 %{
6 #include <stdio.h>
7 #include <inttypes.h>
8
9 #include "dtc.h"
10 #include "srcpos.h"
11
12 extern int yylex(void);
13 extern void yyerror(char const *s);
14 #define ERROR(loc, ...) \
15 do { \
16 srcpos_error((loc), "Error", __VA_ARGS__); \
17 treesource_error = true; \
18 } while (0)
19
20 extern struct dt_info *parser_output;
21 extern bool treesource_error;
22 %}
23
24 %union {
25 char *propnodename;
26 char *labelref;
27 uint8_t byte;
28 struct data data;
29
30 struct {
31 struct data data;
32 int bits;
33 } array;
34
35 struct property *prop;
36 struct property *proplist;
37 struct node *node;
38 struct node *nodelist;
39 struct reserve_info *re;
40 uint64_t integer;
41 unsigned int flags;
42 }
43
44 %token DT_V1
45 %token DT_PLUGIN
46 %token DT_MEMRESERVE
47 %token DT_LSHIFT DT_RSHIFT DT_LE DT_GE DT_EQ DT_NE DT_AND DT_OR
48 %token DT_BITS
49 %token DT_DEL_PROP
50 %token DT_DEL_NODE
51 %token DT_OMIT_NO_REF
52 %token <propnodename> DT_PROPNODENAME
53 %token <integer> DT_LITERAL
54 %token <integer> DT_CHAR_LITERAL
55 %token <byte> DT_BYTE
56 %token <data> DT_STRING
57 %token <labelref> DT_LABEL
58 %token <labelref> DT_LABEL_REF
59 %token <labelref> DT_PATH_REF
60 %token DT_INCBIN
61
62 %type <data> propdata
63 %type <data> propdataprefix
64 %type <flags> header
65 %type <flags> headers
66 %type <re> memreserve
67 %type <re> memreserves
68 %type <array> arrayprefix
69 %type <data> bytestring
70 %type <prop> propdef
71 %type <proplist> proplist
72 %type <labelref> dt_ref
73
74 %type <node> devicetree
75 %type <node> nodedef
76 %type <node> subnode
77 %type <nodelist> subnodes
78
79 %type <integer> integer_prim
80 %type <integer> integer_unary
81 %type <integer> integer_mul
82 %type <integer> integer_add
83 %type <integer> integer_shift
84 %type <integer> integer_rela
85 %type <integer> integer_eq
86 %type <integer> integer_bitand
87 %type <integer> integer_bitxor
88 %type <integer> integer_bitor
89 %type <integer> integer_and
90 %type <integer> integer_or
91 %type <integer> integer_trinary
92 %type <integer> integer_expr
93
94 %%
95
96 sourcefile:
97 headers memreserves devicetree
98 {
99 parser_output = build_dt_info($1, $2, $3,
100 guess_boot_cpuid($3));
101 }
102 ;
103
104 header:
105 DT_V1 ';'
106 {
107 $$ = DTSF_V1;
108 }
109 | DT_V1 ';' DT_PLUGIN ';'
110 {
111 $$ = DTSF_V1 | DTSF_PLUGIN;
112 }
113 ;
114
115 headers:
116 header
117 | header headers
118 {
119 if ($2 != $1)
120 ERROR(&@2, "Header flags don't match earlier ones");
121 $$ = $1;
122 }
123 ;
124
125 memreserves:
126
127 {
128 $$ = NULL;
129 }
130 | memreserve memreserves
131 {
132 $$ = chain_reserve_entry($1, $2);
133 }
134 ;
135
136 memreserve:
137 DT_MEMRESERVE integer_prim integer_prim ';'
138 {
139 $$ = build_reserve_entry($2, $3);
140 }
141 | DT_LABEL memreserve
142 {
143 add_label(&$2->labels, $1);
144 $$ = $2;
145 }
146 ;
147
148 dt_ref: DT_LABEL_REF | DT_PATH_REF;
149
150 devicetree:
151 '/' nodedef
152 {
153 $$ = name_node($2, "");
154 }
155 | devicetree '/' nodedef
156 {
157 $$ = merge_nodes($1, $3);
158 }
159 | dt_ref nodedef
160 {
161
162
163
164
165
166 if (!($<flags>-1 & DTSF_PLUGIN))
167 ERROR(&@2, "Label or path %s not found", $1);
168 $$ = add_orphan_node(
169 name_node(build_node(NULL, NULL, NULL),
170 ""),
171 $2, $1);
172 }
173 | devicetree DT_LABEL dt_ref nodedef
174 {
175 struct node *target = get_node_by_ref($1, $3);
176
177 if (target) {
178 add_label(&target->labels, $2);
179 merge_nodes(target, $4);
180 } else
181 ERROR(&@3, "Label or path %s not found", $3);
182 $$ = $1;
183 }
184 | devicetree DT_PATH_REF nodedef
185 {
186
187
188
189
190
191 if ($<flags>-1 & DTSF_PLUGIN) {
192 add_orphan_node($1, $3, $2);
193 } else {
194 struct node *target = get_node_by_ref($1, $2);
195
196 if (target)
197 merge_nodes(target, $3);
198 else
199 ERROR(&@2, "Label or path %s not found", $2);
200 }
201 $$ = $1;
202 }
203 | devicetree DT_LABEL_REF nodedef
204 {
205 struct node *target = get_node_by_ref($1, $2);
206
207 if (target) {
208 merge_nodes(target, $3);
209 } else {
210
211
212
213
214
215 if ($<flags>-1 & DTSF_PLUGIN)
216 add_orphan_node($1, $3, $2);
217 else
218 ERROR(&@2, "Label or path %s not found", $2);
219 }
220 $$ = $1;
221 }
222 | devicetree DT_DEL_NODE dt_ref ';'
223 {
224 struct node *target = get_node_by_ref($1, $3);
225
226 if (target)
227 delete_node(target);
228 else
229 ERROR(&@3, "Label or path %s not found", $3);
230
231
232 $$ = $1;
233 }
234 | devicetree DT_OMIT_NO_REF dt_ref ';'
235 {
236 struct node *target = get_node_by_ref($1, $3);
237
238 if (target)
239 omit_node_if_unused(target);
240 else
241 ERROR(&@3, "Label or path %s not found", $3);
242
243
244 $$ = $1;
245 }
246 ;
247
248 nodedef:
249 '{' proplist subnodes '}' ';'
250 {
251 $$ = build_node($2, $3, &@$);
252 }
253 ;
254
255 proplist:
256
257 {
258 $$ = NULL;
259 }
260 | proplist propdef
261 {
262 $$ = chain_property($2, $1);
263 }
264 ;
265
266 propdef:
267 DT_PROPNODENAME '=' propdata ';'
268 {
269 $$ = build_property($1, $3, &@$);
270 }
271 | DT_PROPNODENAME ';'
272 {
273 $$ = build_property($1, empty_data, &@$);
274 }
275 | DT_DEL_PROP DT_PROPNODENAME ';'
276 {
277 $$ = build_property_delete($2);
278 }
279 | DT_LABEL propdef
280 {
281 add_label(&$2->labels, $1);
282 $$ = $2;
283 }
284 ;
285
286 propdata:
287 propdataprefix DT_STRING
288 {
289 $$ = data_merge($1, $2);
290 }
291 | propdataprefix arrayprefix '>'
292 {
293 $$ = data_merge($1, $2.data);
294 }
295 | propdataprefix '[' bytestring ']'
296 {
297 $$ = data_merge($1, $3);
298 }
299 | propdataprefix dt_ref
300 {
301 $1 = data_add_marker($1, TYPE_STRING, $2);
302 $$ = data_add_marker($1, REF_PATH, $2);
303 }
304 | propdataprefix DT_INCBIN '(' DT_STRING ',' integer_prim ',' integer_prim ')'
305 {
306 FILE *f = srcfile_relative_open($4.val, NULL);
307 struct data d;
308
309 if ($6 != 0)
310 if (fseek(f, $6, SEEK_SET) != 0)
311 die("Couldn't seek to offset %llu in \"%s\": %s",
312 (unsigned long long)$6, $4.val,
313 strerror(errno));
314
315 d = data_copy_file(f, $8);
316
317 $$ = data_merge($1, d);
318 fclose(f);
319 }
320 | propdataprefix DT_INCBIN '(' DT_STRING ')'
321 {
322 FILE *f = srcfile_relative_open($4.val, NULL);
323 struct data d = empty_data;
324
325 d = data_copy_file(f, -1);
326
327 $$ = data_merge($1, d);
328 fclose(f);
329 }
330 | propdata DT_LABEL
331 {
332 $$ = data_add_marker($1, LABEL, $2);
333 }
334 ;
335
336 propdataprefix:
337
338 {
339 $$ = empty_data;
340 }
341 | propdata ','
342 {
343 $$ = $1;
344 }
345 | propdataprefix DT_LABEL
346 {
347 $$ = data_add_marker($1, LABEL, $2);
348 }
349 ;
350
351 arrayprefix:
352 DT_BITS DT_LITERAL '<'
353 {
354 unsigned long long bits;
355 enum markertype type = TYPE_UINT32;
356
357 bits = $2;
358
359 switch (bits) {
360 case 8: type = TYPE_UINT8; break;
361 case 16: type = TYPE_UINT16; break;
362 case 32: type = TYPE_UINT32; break;
363 case 64: type = TYPE_UINT64; break;
364 default:
365 ERROR(&@2, "Array elements must be"
366 " 8, 16, 32 or 64-bits");
367 bits = 32;
368 }
369
370 $$.data = data_add_marker(empty_data, type, NULL);
371 $$.bits = bits;
372 }
373 | '<'
374 {
375 $$.data = data_add_marker(empty_data, TYPE_UINT32, NULL);
376 $$.bits = 32;
377 }
378 | arrayprefix integer_prim
379 {
380 if ($1.bits < 64) {
381 uint64_t mask = (1ULL << $1.bits) - 1;
382
383
384
385
386
387
388
389
390 if (($2 > mask) && (($2 | mask) != -1ULL))
391 ERROR(&@2, "Value out of range for"
392 " %d-bit array element", $1.bits);
393 }
394
395 $$.data = data_append_integer($1.data, $2, $1.bits);
396 }
397 | arrayprefix dt_ref
398 {
399 uint64_t val = ~0ULL >> (64 - $1.bits);
400
401 if ($1.bits == 32)
402 $1.data = data_add_marker($1.data,
403 REF_PHANDLE,
404 $2);
405 else
406 ERROR(&@2, "References are only allowed in "
407 "arrays with 32-bit elements.");
408
409 $$.data = data_append_integer($1.data, val, $1.bits);
410 }
411 | arrayprefix DT_LABEL
412 {
413 $$.data = data_add_marker($1.data, LABEL, $2);
414 }
415 ;
416
417 integer_prim:
418 DT_LITERAL
419 | DT_CHAR_LITERAL
420 | '(' integer_expr ')'
421 {
422 $$ = $2;
423 }
424 ;
425
426 integer_expr:
427 integer_trinary
428 ;
429
430 integer_trinary:
431 integer_or
432 | integer_or '?' integer_expr ':' integer_trinary { $$ = $1 ? $3 : $5; }
433 ;
434
435 integer_or:
436 integer_and
437 | integer_or DT_OR integer_and { $$ = $1 || $3; }
438 ;
439
440 integer_and:
441 integer_bitor
442 | integer_and DT_AND integer_bitor { $$ = $1 && $3; }
443 ;
444
445 integer_bitor:
446 integer_bitxor
447 | integer_bitor '|' integer_bitxor { $$ = $1 | $3; }
448 ;
449
450 integer_bitxor:
451 integer_bitand
452 | integer_bitxor '^' integer_bitand { $$ = $1 ^ $3; }
453 ;
454
455 integer_bitand:
456 integer_eq
457 | integer_bitand '&' integer_eq { $$ = $1 & $3; }
458 ;
459
460 integer_eq:
461 integer_rela
462 | integer_eq DT_EQ integer_rela { $$ = $1 == $3; }
463 | integer_eq DT_NE integer_rela { $$ = $1 != $3; }
464 ;
465
466 integer_rela:
467 integer_shift
468 | integer_rela '<' integer_shift { $$ = $1 < $3; }
469 | integer_rela '>' integer_shift { $$ = $1 > $3; }
470 | integer_rela DT_LE integer_shift { $$ = $1 <= $3; }
471 | integer_rela DT_GE integer_shift { $$ = $1 >= $3; }
472 ;
473
474 integer_shift:
475 integer_shift DT_LSHIFT integer_add { $$ = $1 << $3; }
476 | integer_shift DT_RSHIFT integer_add { $$ = $1 >> $3; }
477 | integer_add
478 ;
479
480 integer_add:
481 integer_add '+' integer_mul { $$ = $1 + $3; }
482 | integer_add '-' integer_mul { $$ = $1 - $3; }
483 | integer_mul
484 ;
485
486 integer_mul:
487 integer_mul '*' integer_unary { $$ = $1 * $3; }
488 | integer_mul '/' integer_unary
489 {
490 if ($3 != 0) {
491 $$ = $1 / $3;
492 } else {
493 ERROR(&@$, "Division by zero");
494 $$ = 0;
495 }
496 }
497 | integer_mul '%' integer_unary
498 {
499 if ($3 != 0) {
500 $$ = $1 % $3;
501 } else {
502 ERROR(&@$, "Division by zero");
503 $$ = 0;
504 }
505 }
506 | integer_unary
507 ;
508
509 integer_unary:
510 integer_prim
511 | '-' integer_unary { $$ = -$2; }
512 | '~' integer_unary { $$ = ~$2; }
513 | '!' integer_unary { $$ = !$2; }
514 ;
515
516 bytestring:
517
518 {
519 $$ = data_add_marker(empty_data, TYPE_UINT8, NULL);
520 }
521 | bytestring DT_BYTE
522 {
523 $$ = data_append_byte($1, $2);
524 }
525 | bytestring DT_LABEL
526 {
527 $$ = data_add_marker($1, LABEL, $2);
528 }
529 ;
530
531 subnodes:
532
533 {
534 $$ = NULL;
535 }
536 | subnode subnodes
537 {
538 $$ = chain_node($1, $2);
539 }
540 | subnode propdef
541 {
542 ERROR(&@2, "Properties must precede subnodes");
543 YYERROR;
544 }
545 ;
546
547 subnode:
548 DT_PROPNODENAME nodedef
549 {
550 $$ = name_node($2, $1);
551 }
552 | DT_DEL_NODE DT_PROPNODENAME ';'
553 {
554 $$ = name_node(build_node_delete(&@$), $2);
555 }
556 | DT_OMIT_NO_REF subnode
557 {
558 $$ = omit_node_if_unused($2);
559 }
560 | DT_LABEL subnode
561 {
562 add_label(&$2->labels, $1);
563 $$ = $2;
564 }
565 ;
566
567 %%
568
569 void yyerror(char const *s)
570 {
571 ERROR(&yylloc, "%s", s);
572 }