1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
4 */
5
6#include "dtc.h"
7#include "srcpos.h"
8
9/*
10 * Tree building functions
11 */
12
13void add_label(struct label **labels, char *label)
14{
15 struct label *new;
16
17 /* Make sure the label isn't already there */
18 for_each_label_withdel(*labels, new)
19 if (streq(new->label, label)) {
20 new->deleted = 0;
21 return;
22 }
23
24 new = xmalloc(len: sizeof(*new));
25 memset(s: new, c: 0, n: sizeof(*new));
26 new->label = label;
27 new->next = *labels;
28 *labels = new;
29}
30
31void delete_labels(struct label **labels)
32{
33 struct label *label;
34
35 for_each_label(*labels, label)
36 label->deleted = 1;
37}
38
39struct property *build_property(const char *name, struct data val,
40 struct srcpos *srcpos)
41{
42 struct property *new = xmalloc(len: sizeof(*new));
43
44 memset(s: new, c: 0, n: sizeof(*new));
45
46 new->name = xstrdup(s: name);
47 new->val = val;
48 new->srcpos = srcpos_copy(pos: srcpos);
49
50 return new;
51}
52
53struct property *build_property_delete(const char *name)
54{
55 struct property *new = xmalloc(len: sizeof(*new));
56
57 memset(s: new, c: 0, n: sizeof(*new));
58
59 new->name = xstrdup(s: name);
60 new->deleted = 1;
61
62 return new;
63}
64
65struct property *chain_property(struct property *first, struct property *list)
66{
67 assert(first->next == NULL);
68
69 first->next = list;
70 return first;
71}
72
73struct property *reverse_properties(struct property *first)
74{
75 struct property *p = first;
76 struct property *head = NULL;
77 struct property *next;
78
79 while (p) {
80 next = p->next;
81 p->next = head;
82 head = p;
83 p = next;
84 }
85 return head;
86}
87
88struct node *build_node(struct property *proplist, struct node *children,
89 struct srcpos *srcpos)
90{
91 struct node *new = xmalloc(len: sizeof(*new));
92 struct node *child;
93
94 memset(s: new, c: 0, n: sizeof(*new));
95
96 new->proplist = reverse_properties(first: proplist);
97 new->children = children;
98 new->srcpos = srcpos_copy(pos: srcpos);
99
100 for_each_child(new, child) {
101 child->parent = new;
102 }
103
104 return new;
105}
106
107struct node *build_node_delete(struct srcpos *srcpos)
108{
109 struct node *new = xmalloc(len: sizeof(*new));
110
111 memset(s: new, c: 0, n: sizeof(*new));
112
113 new->deleted = 1;
114 new->srcpos = srcpos_copy(pos: srcpos);
115
116 return new;
117}
118
119struct node *name_node(struct node *node, const char *name)
120{
121 assert(node->name == NULL);
122
123 node->name = xstrdup(s: name);
124
125 return node;
126}
127
128struct node *omit_node_if_unused(struct node *node)
129{
130 node->omit_if_unused = 1;
131
132 return node;
133}
134
135struct node *reference_node(struct node *node)
136{
137 node->is_referenced = 1;
138
139 return node;
140}
141
142struct node *merge_nodes(struct node *old_node, struct node *new_node)
143{
144 struct property *new_prop, *old_prop;
145 struct node *new_child, *old_child;
146 struct label *l;
147
148 old_node->deleted = 0;
149
150 /* Add new node labels to old node */
151 for_each_label_withdel(new_node->labels, l)
152 add_label(labels: &old_node->labels, label: l->label);
153
154 /* Move properties from the new node to the old node. If there
155 * is a collision, replace the old value with the new */
156 while (new_node->proplist) {
157 /* Pop the property off the list */
158 new_prop = new_node->proplist;
159 new_node->proplist = new_prop->next;
160 new_prop->next = NULL;
161
162 if (new_prop->deleted) {
163 delete_property_by_name(node: old_node, name: new_prop->name);
164 free(ptr: new_prop);
165 continue;
166 }
167
168 /* Look for a collision, set new value if there is */
169 for_each_property_withdel(old_node, old_prop) {
170 if (streq(old_prop->name, new_prop->name)) {
171 /* Add new labels to old property */
172 for_each_label_withdel(new_prop->labels, l)
173 add_label(labels: &old_prop->labels, label: l->label);
174
175 old_prop->val = new_prop->val;
176 old_prop->deleted = 0;
177 free(ptr: old_prop->srcpos);
178 old_prop->srcpos = new_prop->srcpos;
179 free(ptr: new_prop);
180 new_prop = NULL;
181 break;
182 }
183 }
184
185 /* if no collision occurred, add property to the old node. */
186 if (new_prop)
187 add_property(node: old_node, prop: new_prop);
188 }
189
190 /* Move the override child nodes into the primary node. If
191 * there is a collision, then merge the nodes. */
192 while (new_node->children) {
193 /* Pop the child node off the list */
194 new_child = new_node->children;
195 new_node->children = new_child->next_sibling;
196 new_child->parent = NULL;
197 new_child->next_sibling = NULL;
198
199 if (new_child->deleted) {
200 delete_node_by_name(parent: old_node, name: new_child->name);
201 free(ptr: new_child);
202 continue;
203 }
204
205 /* Search for a collision. Merge if there is */
206 for_each_child_withdel(old_node, old_child) {
207 if (streq(old_child->name, new_child->name)) {
208 merge_nodes(old_node: old_child, new_node: new_child);
209 new_child = NULL;
210 break;
211 }
212 }
213
214 /* if no collision occurred, add child to the old node. */
215 if (new_child)
216 add_child(parent: old_node, child: new_child);
217 }
218
219 old_node->srcpos = srcpos_extend(new_srcpos: old_node->srcpos, old_srcpos: new_node->srcpos);
220
221 /* The new node contents are now merged into the old node. Free
222 * the new node. */
223 free(ptr: new_node);
224
225 return old_node;
226}
227
228struct node * add_orphan_node(struct node *dt, struct node *new_node, char *ref)
229{
230 static unsigned int next_orphan_fragment = 0;
231 struct node *node;
232 struct property *p;
233 struct data d = empty_data;
234 char *name;
235
236 if (ref[0] == '/') {
237 d = data_add_marker(d, type: TYPE_STRING, ref);
238 d = data_append_data(d, p: ref, len: strlen(s: ref) + 1);
239
240 p = build_property(name: "target-path", val: d, NULL);
241 } else {
242 d = data_add_marker(d, type: REF_PHANDLE, ref);
243 d = data_append_integer(d, word: 0xffffffff, bits: 32);
244
245 p = build_property(name: "target", val: d, NULL);
246 }
247
248 xasprintf(strp: &name, fmt: "fragment@%u",
249 next_orphan_fragment++);
250 name_node(node: new_node, name: "__overlay__");
251 node = build_node(proplist: p, children: new_node, NULL);
252 name_node(node, name);
253 free(ptr: name);
254
255 add_child(parent: dt, child: node);
256 return dt;
257}
258
259struct node *chain_node(struct node *first, struct node *list)
260{
261 assert(first->next_sibling == NULL);
262
263 first->next_sibling = list;
264 return first;
265}
266
267void add_property(struct node *node, struct property *prop)
268{
269 struct property **p;
270
271 prop->next = NULL;
272
273 p = &node->proplist;
274 while (*p)
275 p = &((*p)->next);
276
277 *p = prop;
278}
279
280void delete_property_by_name(struct node *node, char *name)
281{
282 struct property *prop = node->proplist;
283
284 while (prop) {
285 if (streq(prop->name, name)) {
286 delete_property(prop);
287 return;
288 }
289 prop = prop->next;
290 }
291}
292
293void delete_property(struct property *prop)
294{
295 prop->deleted = 1;
296 delete_labels(labels: &prop->labels);
297}
298
299void add_child(struct node *parent, struct node *child)
300{
301 struct node **p;
302
303 child->next_sibling = NULL;
304 child->parent = parent;
305
306 p = &parent->children;
307 while (*p)
308 p = &((*p)->next_sibling);
309
310 *p = child;
311}
312
313void delete_node_by_name(struct node *parent, char *name)
314{
315 struct node *node = parent->children;
316
317 while (node) {
318 if (streq(node->name, name)) {
319 delete_node(node);
320 return;
321 }
322 node = node->next_sibling;
323 }
324}
325
326void delete_node(struct node *node)
327{
328 struct property *prop;
329 struct node *child;
330
331 node->deleted = 1;
332 for_each_child(node, child)
333 delete_node(node: child);
334 for_each_property(node, prop)
335 delete_property(prop);
336 delete_labels(labels: &node->labels);
337}
338
339void append_to_property(struct node *node,
340 char *name, const void *data, int len,
341 enum markertype type)
342{
343 struct data d;
344 struct property *p;
345
346 p = get_property(node, propname: name);
347 if (p) {
348 d = data_add_marker(d: p->val, type, ref: name);
349 d = data_append_data(d, p: data, len);
350 p->val = d;
351 } else {
352 d = data_add_marker(empty_data, type, ref: name);
353 d = data_append_data(d, data, len);
354 p = build_property(name, d, NULL);
355 add_property(node, p);
356 }
357}
358
359struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size)
360{
361 struct reserve_info *new = xmalloc(len: sizeof(*new));
362
363 memset(s: new, c: 0, n: sizeof(*new));
364
365 new->address = address;
366 new->size = size;
367
368 return new;
369}
370
371struct reserve_info *chain_reserve_entry(struct reserve_info *first,
372 struct reserve_info *list)
373{
374 assert(first->next == NULL);
375
376 first->next = list;
377 return first;
378}
379
380struct reserve_info *add_reserve_entry(struct reserve_info *list,
381 struct reserve_info *new)
382{
383 struct reserve_info *last;
384
385 new->next = NULL;
386
387 if (! list)
388 return new;
389
390 for (last = list; last->next; last = last->next)
391 ;
392
393 last->next = new;
394
395 return list;
396}
397
398struct dt_info *build_dt_info(unsigned int dtsflags,
399 struct reserve_info *reservelist,
400 struct node *tree, uint32_t boot_cpuid_phys)
401{
402 struct dt_info *dti;
403
404 dti = xmalloc(len: sizeof(*dti));
405 dti->dtsflags = dtsflags;
406 dti->reservelist = reservelist;
407 dti->dt = tree;
408 dti->boot_cpuid_phys = boot_cpuid_phys;
409
410 return dti;
411}
412
413/*
414 * Tree accessor functions
415 */
416
417const char *get_unitname(struct node *node)
418{
419 if (node->name[node->basenamelen] == '\0')
420 return "";
421 else
422 return node->name + node->basenamelen + 1;
423}
424
425struct property *get_property(struct node *node, const char *propname)
426{
427 struct property *prop;
428
429 for_each_property(node, prop)
430 if (streq(prop->name, propname))
431 return prop;
432
433 return NULL;
434}
435
436cell_t propval_cell(struct property *prop)
437{
438 assert(prop->val.len == sizeof(cell_t));
439 return fdt32_to_cpu(*((fdt32_t *)prop->val.val));
440}
441
442cell_t propval_cell_n(struct property *prop, unsigned int n)
443{
444 assert(prop->val.len / sizeof(cell_t) > n);
445 return fdt32_to_cpu(*((fdt32_t *)prop->val.val + n));
446}
447
448struct property *get_property_by_label(struct node *tree, const char *label,
449 struct node **node)
450{
451 struct property *prop;
452 struct node *c;
453
454 *node = tree;
455
456 for_each_property(tree, prop) {
457 struct label *l;
458
459 for_each_label(prop->labels, l)
460 if (streq(l->label, label))
461 return prop;
462 }
463
464 for_each_child(tree, c) {
465 prop = get_property_by_label(tree: c, label, node);
466 if (prop)
467 return prop;
468 }
469
470 *node = NULL;
471 return NULL;
472}
473
474struct marker *get_marker_label(struct node *tree, const char *label,
475 struct node **node, struct property **prop)
476{
477 struct marker *m;
478 struct property *p;
479 struct node *c;
480
481 *node = tree;
482
483 for_each_property(tree, p) {
484 *prop = p;
485 m = p->val.markers;
486 for_each_marker_of_type(m, LABEL)
487 if (streq(m->ref, label))
488 return m;
489 }
490
491 for_each_child(tree, c) {
492 m = get_marker_label(tree: c, label, node, prop);
493 if (m)
494 return m;
495 }
496
497 *prop = NULL;
498 *node = NULL;
499 return NULL;
500}
501
502struct node *get_subnode(struct node *node, const char *nodename)
503{
504 struct node *child;
505
506 for_each_child(node, child)
507 if (streq(child->name, nodename))
508 return child;
509
510 return NULL;
511}
512
513struct node *get_node_by_path(struct node *tree, const char *path)
514{
515 const char *p;
516 struct node *child;
517
518 if (!path || ! (*path)) {
519 if (tree->deleted)
520 return NULL;
521 return tree;
522 }
523
524 while (path[0] == '/')
525 path++;
526
527 p = strchr(s: path, c: '/');
528
529 for_each_child(tree, child) {
530 if (p && strprefixeq(path, (size_t)(p - path), child->name))
531 return get_node_by_path(tree: child, path: p+1);
532 else if (!p && streq(path, child->name))
533 return child;
534 }
535
536 return NULL;
537}
538
539struct node *get_node_by_label(struct node *tree, const char *label)
540{
541 struct node *child, *node;
542 struct label *l;
543
544 assert(label && (strlen(label) > 0));
545
546 for_each_label(tree->labels, l)
547 if (streq(l->label, label))
548 return tree;
549
550 for_each_child(tree, child) {
551 node = get_node_by_label(tree: child, label);
552 if (node)
553 return node;
554 }
555
556 return NULL;
557}
558
559struct node *get_node_by_phandle(struct node *tree, cell_t phandle)
560{
561 struct node *child, *node;
562
563 if (!phandle_is_valid(phandle)) {
564 assert(generate_fixups);
565 return NULL;
566 }
567
568 if (tree->phandle == phandle) {
569 if (tree->deleted)
570 return NULL;
571 return tree;
572 }
573
574 for_each_child(tree, child) {
575 node = get_node_by_phandle(tree: child, phandle);
576 if (node)
577 return node;
578 }
579
580 return NULL;
581}
582
583struct node *get_node_by_ref(struct node *tree, const char *ref)
584{
585 struct node *target = tree;
586 const char *label = NULL, *path = NULL;
587
588 if (streq(ref, "/"))
589 return tree;
590
591 if (ref[0] == '/')
592 path = ref;
593 else
594 label = ref;
595
596 if (label) {
597 const char *slash = strchr(s: label, c: '/');
598 char *buf = NULL;
599
600 if (slash) {
601 buf = xstrndup(s: label, len: slash - label);
602 label = buf;
603 path = slash + 1;
604 }
605
606 target = get_node_by_label(tree, label);
607
608 free(ptr: buf);
609
610 if (!target)
611 return NULL;
612 }
613
614 if (path)
615 target = get_node_by_path(tree: target, path);
616
617 return target;
618}
619
620static void add_phandle_property(struct node *node,
621 const char *name, int format)
622{
623 struct data d;
624
625 if (!(phandle_format & format))
626 return;
627 if (get_property(node, propname: name))
628 return;
629
630 d = data_add_marker(empty_data, type: TYPE_UINT32, NULL);
631 d = data_append_cell(d, node->phandle);
632
633 add_property(node, build_property(name, d, NULL));
634}
635
636cell_t get_node_phandle(struct node *root, struct node *node)
637{
638 static cell_t phandle = 1; /* FIXME: ick, static local */
639
640 if (phandle_is_valid(phandle: node->phandle))
641 return node->phandle;
642
643 while (get_node_by_phandle(tree: root, phandle))
644 phandle++;
645
646 node->phandle = phandle;
647
648 add_phandle_property(node, name: "linux,phandle", PHANDLE_LEGACY);
649 add_phandle_property(node, name: "phandle", PHANDLE_EPAPR);
650
651 /* If the node *does* have a phandle property, we must
652 * be dealing with a self-referencing phandle, which will be
653 * fixed up momentarily in the caller */
654
655 return node->phandle;
656}
657
658uint32_t guess_boot_cpuid(struct node *tree)
659{
660 struct node *cpus, *bootcpu;
661 struct property *reg;
662
663 cpus = get_node_by_path(tree, path: "/cpus");
664 if (!cpus)
665 return 0;
666
667
668 bootcpu = cpus->children;
669 if (!bootcpu)
670 return 0;
671
672 reg = get_property(node: bootcpu, propname: "reg");
673 if (!reg || (reg->val.len != sizeof(uint32_t)))
674 return 0;
675
676 /* FIXME: Sanity check node? */
677
678 return propval_cell(prop: reg);
679}
680
681static int cmp_reserve_info(const void *ax, const void *bx)
682{
683 const struct reserve_info *a, *b;
684
685 a = *((const struct reserve_info * const *)ax);
686 b = *((const struct reserve_info * const *)bx);
687
688 if (a->address < b->address)
689 return -1;
690 else if (a->address > b->address)
691 return 1;
692 else if (a->size < b->size)
693 return -1;
694 else if (a->size > b->size)
695 return 1;
696 else
697 return 0;
698}
699
700static void sort_reserve_entries(struct dt_info *dti)
701{
702 struct reserve_info *ri, **tbl;
703 int n = 0, i = 0;
704
705 for (ri = dti->reservelist;
706 ri;
707 ri = ri->next)
708 n++;
709
710 if (n == 0)
711 return;
712
713 tbl = xmalloc(len: n * sizeof(*tbl));
714
715 for (ri = dti->reservelist;
716 ri;
717 ri = ri->next)
718 tbl[i++] = ri;
719
720 qsort(base: tbl, nmemb: n, size: sizeof(*tbl), compar: cmp_reserve_info);
721
722 dti->reservelist = tbl[0];
723 for (i = 0; i < (n-1); i++)
724 tbl[i]->next = tbl[i+1];
725 tbl[n-1]->next = NULL;
726
727 free(ptr: tbl);
728}
729
730static int cmp_prop(const void *ax, const void *bx)
731{
732 const struct property *a, *b;
733
734 a = *((const struct property * const *)ax);
735 b = *((const struct property * const *)bx);
736
737 return strcmp(s1: a->name, s2: b->name);
738}
739
740static void sort_properties(struct node *node)
741{
742 int n = 0, i = 0;
743 struct property *prop, **tbl;
744
745 for_each_property_withdel(node, prop)
746 n++;
747
748 if (n == 0)
749 return;
750
751 tbl = xmalloc(len: n * sizeof(*tbl));
752
753 for_each_property_withdel(node, prop)
754 tbl[i++] = prop;
755
756 qsort(base: tbl, nmemb: n, size: sizeof(*tbl), compar: cmp_prop);
757
758 node->proplist = tbl[0];
759 for (i = 0; i < (n-1); i++)
760 tbl[i]->next = tbl[i+1];
761 tbl[n-1]->next = NULL;
762
763 free(ptr: tbl);
764}
765
766static int cmp_subnode(const void *ax, const void *bx)
767{
768 const struct node *a, *b;
769
770 a = *((const struct node * const *)ax);
771 b = *((const struct node * const *)bx);
772
773 return strcmp(s1: a->name, s2: b->name);
774}
775
776static void sort_subnodes(struct node *node)
777{
778 int n = 0, i = 0;
779 struct node *subnode, **tbl;
780
781 for_each_child_withdel(node, subnode)
782 n++;
783
784 if (n == 0)
785 return;
786
787 tbl = xmalloc(len: n * sizeof(*tbl));
788
789 for_each_child_withdel(node, subnode)
790 tbl[i++] = subnode;
791
792 qsort(base: tbl, nmemb: n, size: sizeof(*tbl), compar: cmp_subnode);
793
794 node->children = tbl[0];
795 for (i = 0; i < (n-1); i++)
796 tbl[i]->next_sibling = tbl[i+1];
797 tbl[n-1]->next_sibling = NULL;
798
799 free(ptr: tbl);
800}
801
802static void sort_node(struct node *node)
803{
804 struct node *c;
805
806 sort_properties(node);
807 sort_subnodes(node);
808 for_each_child_withdel(node, c)
809 sort_node(node: c);
810}
811
812void sort_tree(struct dt_info *dti)
813{
814 sort_reserve_entries(dti);
815 sort_node(node: dti->dt);
816}
817
818/* utility helper to avoid code duplication */
819static struct node *build_and_name_child_node(struct node *parent, const char *name)
820{
821 struct node *node;
822
823 node = build_node(NULL, NULL, NULL);
824 name_node(node, name);
825 add_child(parent, child: node);
826
827 return node;
828}
829
830static struct node *build_root_node(struct node *dt, const char *name)
831{
832 struct node *an;
833
834 an = get_subnode(node: dt, nodename: name);
835 if (!an)
836 an = build_and_name_child_node(parent: dt, name);
837
838 if (!an)
839 die(str: "Could not build root node /%s\n", name);
840
841 return an;
842}
843
844static bool any_label_tree(struct dt_info *dti, struct node *node)
845{
846 struct node *c;
847
848 if (node->labels)
849 return true;
850
851 for_each_child(node, c)
852 if (any_label_tree(dti, node: c))
853 return true;
854
855 return false;
856}
857
858static void generate_label_tree_internal(struct dt_info *dti,
859 struct node *an, struct node *node,
860 bool allocph)
861{
862 struct node *dt = dti->dt;
863 struct node *c;
864 struct property *p;
865 struct label *l;
866
867 /* if there are labels */
868 if (node->labels) {
869
870 /* now add the label in the node */
871 for_each_label(node->labels, l) {
872
873 /* check whether the label already exists */
874 p = get_property(node: an, propname: l->label);
875 if (p) {
876 fprintf(stderr, format: "WARNING: label %s already"
877 " exists in /%s", l->label,
878 an->name);
879 continue;
880 }
881
882 /* insert it */
883 p = build_property(name: l->label,
884 val: data_copy_escape_string(s: node->fullpath,
885 len: strlen(s: node->fullpath)),
886 NULL);
887 add_property(node: an, prop: p);
888 }
889
890 /* force allocation of a phandle for this node */
891 if (allocph)
892 (void)get_node_phandle(root: dt, node);
893 }
894
895 for_each_child(node, c)
896 generate_label_tree_internal(dti, an, node: c, allocph);
897}
898
899static bool any_fixup_tree(struct dt_info *dti, struct node *node)
900{
901 struct node *c;
902 struct property *prop;
903 struct marker *m;
904
905 for_each_property(node, prop) {
906 m = prop->val.markers;
907 for_each_marker_of_type(m, REF_PHANDLE) {
908 if (!get_node_by_ref(tree: dti->dt, ref: m->ref))
909 return true;
910 }
911 }
912
913 for_each_child(node, c) {
914 if (any_fixup_tree(dti, node: c))
915 return true;
916 }
917
918 return false;
919}
920
921static void add_fixup_entry(struct dt_info *dti, struct node *fn,
922 struct node *node, struct property *prop,
923 struct marker *m)
924{
925 char *entry;
926
927 /* m->ref can only be a REF_PHANDLE, but check anyway */
928 assert(m->type == REF_PHANDLE);
929
930 /* The format only permits fixups for references to label, not
931 * references to path */
932 if (strchr(s: m->ref, c: '/'))
933 die(str: "Can't generate fixup for reference to path &{%s}\n",
934 m->ref);
935
936 /* there shouldn't be any ':' in the arguments */
937 if (strchr(s: node->fullpath, c: ':') || strchr(s: prop->name, c: ':'))
938 die(str: "arguments should not contain ':'\n");
939
940 xasprintf(strp: &entry, fmt: "%s:%s:%u",
941 node->fullpath, prop->name, m->offset);
942 append_to_property(node: fn, name: m->ref, data: entry, len: strlen(s: entry) + 1, type: TYPE_STRING);
943
944 free(ptr: entry);
945}
946
947static void generate_fixups_tree_internal(struct dt_info *dti,
948 struct node *fn,
949 struct node *node)
950{
951 struct node *dt = dti->dt;
952 struct node *c;
953 struct property *prop;
954 struct marker *m;
955 struct node *refnode;
956
957 for_each_property(node, prop) {
958 m = prop->val.markers;
959 for_each_marker_of_type(m, REF_PHANDLE) {
960 refnode = get_node_by_ref(tree: dt, ref: m->ref);
961 if (!refnode)
962 add_fixup_entry(dti, fn, node, prop, m);
963 }
964 }
965
966 for_each_child(node, c)
967 generate_fixups_tree_internal(dti, fn, node: c);
968}
969
970static bool any_local_fixup_tree(struct dt_info *dti, struct node *node)
971{
972 struct node *c;
973 struct property *prop;
974 struct marker *m;
975
976 for_each_property(node, prop) {
977 m = prop->val.markers;
978 for_each_marker_of_type(m, REF_PHANDLE) {
979 if (get_node_by_ref(tree: dti->dt, ref: m->ref))
980 return true;
981 }
982 }
983
984 for_each_child(node, c) {
985 if (any_local_fixup_tree(dti, node: c))
986 return true;
987 }
988
989 return false;
990}
991
992static void add_local_fixup_entry(struct dt_info *dti,
993 struct node *lfn, struct node *node,
994 struct property *prop, struct marker *m,
995 struct node *refnode)
996{
997 struct node *wn, *nwn; /* local fixup node, walk node, new */
998 fdt32_t value_32;
999 char **compp;
1000 int i, depth;
1001
1002 /* walk back retrieving depth */
1003 depth = 0;
1004 for (wn = node; wn; wn = wn->parent)
1005 depth++;
1006
1007 /* allocate name array */
1008 compp = xmalloc(len: sizeof(*compp) * depth);
1009
1010 /* store names in the array */
1011 for (wn = node, i = depth - 1; wn; wn = wn->parent, i--)
1012 compp[i] = wn->name;
1013
1014 /* walk the path components creating nodes if they don't exist */
1015 for (wn = lfn, i = 1; i < depth; i++, wn = nwn) {
1016 /* if no node exists, create it */
1017 nwn = get_subnode(node: wn, nodename: compp[i]);
1018 if (!nwn)
1019 nwn = build_and_name_child_node(parent: wn, name: compp[i]);
1020 }
1021
1022 free(ptr: compp);
1023
1024 value_32 = cpu_to_fdt32(m->offset);
1025 append_to_property(node: wn, name: prop->name, data: &value_32, len: sizeof(value_32), type: TYPE_UINT32);
1026}
1027
1028static void generate_local_fixups_tree_internal(struct dt_info *dti,
1029 struct node *lfn,
1030 struct node *node)
1031{
1032 struct node *dt = dti->dt;
1033 struct node *c;
1034 struct property *prop;
1035 struct marker *m;
1036 struct node *refnode;
1037
1038 for_each_property(node, prop) {
1039 m = prop->val.markers;
1040 for_each_marker_of_type(m, REF_PHANDLE) {
1041 refnode = get_node_by_ref(tree: dt, ref: m->ref);
1042 if (refnode)
1043 add_local_fixup_entry(dti, lfn, node, prop, m, refnode);
1044 }
1045 }
1046
1047 for_each_child(node, c)
1048 generate_local_fixups_tree_internal(dti, lfn, node: c);
1049}
1050
1051void generate_label_tree(struct dt_info *dti, const char *name, bool allocph)
1052{
1053 if (!any_label_tree(dti, node: dti->dt))
1054 return;
1055 generate_label_tree_internal(dti, an: build_root_node(dt: dti->dt, name),
1056 node: dti->dt, allocph);
1057}
1058
1059void generate_fixups_tree(struct dt_info *dti, const char *name)
1060{
1061 if (!any_fixup_tree(dti, node: dti->dt))
1062 return;
1063 generate_fixups_tree_internal(dti, fn: build_root_node(dt: dti->dt, name),
1064 node: dti->dt);
1065}
1066
1067void generate_local_fixups_tree(struct dt_info *dti, const char *name)
1068{
1069 if (!any_local_fixup_tree(dti, node: dti->dt))
1070 return;
1071 generate_local_fixups_tree_internal(dti, lfn: build_root_node(dt: dti->dt, name),
1072 node: dti->dt);
1073}
1074

source code of linux/scripts/dtc/livetree.c