scripts/dtc/livetree.c

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