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(const 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 = xstrdup(name);
  47         new->val = val;
  48         new->srcpos = srcpos_copy(srcpos);
  49
  50         return new;
  51 }
  52
  53 struct property *build_property_delete(const char *name)
  54 {
  55         struct property *new = xmalloc(sizeof(*new));
  56
  57         memset(new, 0, sizeof(*new));
  58
  59         new->name = xstrdup(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, const char *name)
 120 {
 121         assert(node->name == NULL);
 122
 123         node->name = xstrdup(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         free(name);
 254
 255         add_child(dt, node);
 256         return dt;
 257 }
 258
 259 struct 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
 267 void 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
 280 void 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
 293 void delete_property(struct property *prop)
 294 {
 295         prop->deleted = 1;
 296         delete_labels(&prop->labels);
 297 }
 298
 299 void 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
 313 void 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
 326 void 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(child);
 334         for_each_property(node, prop)
 335                 delete_property(prop);
 336         delete_labels(&node->labels);
 337 }
 338
 339 void 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, name);
 347         if (p) {
 348                 d = data_add_marker(p->val, type, name);
 349                 d = data_append_data(d, data, len);
 350                 p->val = d;
 351         } else {
 352                 d = data_add_marker(empty_data, type, name);
 353                 d = data_append_data(d, data, len);
 354                 p = build_property(name, d, NULL);
 355                 add_property(node, p);
 356         }
 357 }
 358
 359 struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size)
 360 {
 361         struct reserve_info *new = xmalloc(sizeof(*new));
 362
 363         memset(new, 0, sizeof(*new));
 364
 365         new->address = address;
 366         new->size = size;
 367
 368         return new;
 369 }
 370
 371 struct 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
 380 struct 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
 398 struct 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(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
 417 const 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
 425 struct 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
 436 cell_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
 442 cell_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
 448 struct 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(c, label, node);
 466                 if (prop)
 467                         return prop;
 468         }
 469
 470         *node = NULL;
 471         return NULL;
 472 }
 473
 474 struct 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(c, label, node, prop);
 493                 if (m)
 494                         return m;
 495         }
 496
 497         *prop = NULL;
 498         *node = NULL;
 499         return NULL;
 500 }
 501
 502 struct 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
 513 struct 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(path, '/');
 528
 529         for_each_child(tree, child) {
 530                 if (p && strprefixeq(path, (size_t)(p - path), child->name))
 531                         return get_node_by_path(child, p+1);
 532                 else if (!p && streq(path, child->name))
 533                         return child;
 534         }
 535
 536         return NULL;
 537 }
 538
 539 struct 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(child, label);
 552                 if (node)
 553                         return node;
 554         }
 555
 556         return NULL;
 557 }
 558
 559 struct 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(child, phandle);
 576                 if (node)
 577                         return node;
 578         }
 579
 580         return NULL;
 581 }
 582
 583 struct 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(label, '/');
 598                 char *buf = NULL;
 599
 600                 if (slash) {
 601                         buf = xstrndup(label, slash - label);
 602                         label = buf;
 603                         path = slash + 1;
 604                 }
 605
 606                 target = get_node_by_label(tree, label);
 607
 608                 free(buf);
 609
 610                 if (!target)
 611                         return NULL;
 612         }
 613
 614         if (path)
 615                 target = get_node_by_path(target, path);
 616
 617         return target;
 618 }
 619
 620 static 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, name))
 628                 return;
 629
 630         d = data_add_marker(empty_data, TYPE_UINT32, NULL);
 631         d = data_append_cell(d, node->phandle);
 632
 633         add_property(node, build_property(name, d, NULL));
 634 }
 635
 636 cell_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(node->phandle))
 641                 return node->phandle;
 642
 643         while (get_node_by_phandle(root, phandle))
 644                 phandle++;
 645
 646         node->phandle = phandle;
 647
 648         add_phandle_property(node, "linux,phandle", PHANDLE_LEGACY);
 649         add_phandle_property(node, "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
 658 uint32_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, "/cpus");
 664         if (!cpus)
 665                 return 0;
 666
 667
 668         bootcpu = cpus->children;
 669         if (!bootcpu)
 670                 return 0;
 671
 672         reg = get_property(bootcpu, "reg");
 673         if (!reg || (reg->val.len != sizeof(uint32_t)))
 674                 return 0;
 675
 676         /* FIXME: Sanity check node? */
 677
 678         return propval_cell(reg);
 679 }
 680
 681 static 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
 700 static 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(n * sizeof(*tbl));
 714
 715         for (ri = dti->reservelist;
 716              ri;
 717              ri = ri->next)
 718                 tbl[i++] = ri;
 719
 720         qsort(tbl, n, sizeof(*tbl), 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(tbl);
 728 }
 729
 730 static 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(a->name, b->name);
 738 }
 739
 740 static 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(n * sizeof(*tbl));
 752
 753         for_each_property_withdel(node, prop)
 754                 tbl[i++] = prop;
 755
 756         qsort(tbl, n, sizeof(*tbl), 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(tbl);
 764 }
 765
 766 static 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(a->name, b->name);
 774 }
 775
 776 static 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(n * sizeof(*tbl));
 788
 789         for_each_child_withdel(node, subnode)
 790                 tbl[i++] = subnode;
 791
 792         qsort(tbl, n, sizeof(*tbl), 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(tbl);
 800 }
 801
 802 static 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(c);
 810 }
 811
 812 void sort_tree(struct dt_info *dti)
 813 {
 814         sort_reserve_entries(dti);
 815         sort_node(dti->dt);
 816 }
 817
 818 /* utility helper to avoid code duplication */
 819 static 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, node);
 826
 827         return node;
 828 }
 829
 830 static struct node *build_root_node(struct node *dt, const char *name)
 831 {
 832         struct node *an;
 833
 834         an = get_subnode(dt, name);
 835         if (!an)
 836                 an = build_and_name_child_node(dt, name);
 837
 838         if (!an)
 839                 die("Could not build root node /%s\n", name);
 840
 841         return an;
 842 }
 843
 844 static 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, c))
 853                         return true;
 854
 855         return false;
 856 }
 857
 858 static 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(an, l->label);
 875                         if (p) {
 876                                 fprintf(stderr, "WARNING: label %s already"
 877                                         " exists in /%s", l->label,
 878                                         an->name);
 879                                 continue;
 880                         }
 881
 882                         /* insert it */
 883                         p = build_property(l->label,
 884                                 data_copy_escape_string(node->fullpath,
 885                                                 strlen(node->fullpath)),
 886                                 NULL);
 887                         add_property(an, p);
 888                 }
 889
 890                 /* force allocation of a phandle for this node */
 891                 if (allocph)
 892                         (void)get_node_phandle(dt, node);
 893         }
 894
 895         for_each_child(node, c)
 896                 generate_label_tree_internal(dti, an, c, allocph);
 897 }
 898
 899 static 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(dti->dt, m->ref))
 909                                 return true;
 910                 }
 911         }
 912
 913         for_each_child(node, c) {
 914                 if (any_fixup_tree(dti, c))
 915                         return true;
 916         }
 917
 918         return false;
 919 }
 920
 921 static 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(m->ref, '/'))
 933                 die("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(node->fullpath, ':') || strchr(prop->name, ':'))
 938                 die("arguments should not contain ':'\n");
 939
 940         xasprintf(&entry, "%s:%s:%u",
 941                         node->fullpath, prop->name, m->offset);
 942         append_to_property(fn, m->ref, entry, strlen(entry) + 1, TYPE_STRING);
 943
 944         free(entry);
 945 }
 946
 947 static 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(dt, 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, c);
 968 }
 969
 970 static 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(dti->dt, m->ref))
 980                                 return true;
 981                 }
 982         }
 983
 984         for_each_child(node, c) {
 985                 if (any_local_fixup_tree(dti, c))
 986                         return true;
 987         }
 988
 989         return false;
 990 }
 991
 992 static 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(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(wn, compp[i]);
1018                 if (!nwn)
1019                         nwn = build_and_name_child_node(wn, compp[i]);
1020         }
1021
1022         free(compp);
1023
1024         value_32 = cpu_to_fdt32(m->offset);
1025         append_to_property(wn, prop->name, &value_32, sizeof(value_32), TYPE_UINT32);
1026 }
1027
1028 static 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(dt, 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, c);
1049 }
1050
1051 void generate_label_tree(struct dt_info *dti, const char *name, bool allocph)
1052 {
1053         if (!any_label_tree(dti, dti->dt))
1054                 return;
1055         generate_label_tree_internal(dti, build_root_node(dti->dt, name),
1056                                      dti->dt, allocph);
1057 }
1058
1059 void generate_fixups_tree(struct dt_info *dti, const char *name)
1060 {
1061         if (!any_fixup_tree(dti, dti->dt))
1062                 return;
1063         generate_fixups_tree_internal(dti, build_root_node(dti->dt, name),
1064                                       dti->dt);
1065 }
1066
1067 void generate_local_fixups_tree(struct dt_info *dti, const char *name)
1068 {
1069         if (!any_local_fixup_tree(dti, dti->dt))
1070                 return;
1071         generate_local_fixups_tree_internal(dti, build_root_node(dti->dt, name),
1072                                             dti->dt);
1073 }