scripts/dtc/livetree.c

   1 /*
   2  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  18  *                                                                   USA
  19  */
  20
  21 #include "dtc.h"
  22
  23 /*
  24  * Tree building functions
  25  */
  26
  27 void add_label(struct label **labels, char *label)
  28 {
  29         struct label *new;
  30
  31         /* Make sure the label isn't already there */
  32         for_each_label_withdel(*labels, new)
  33                 if (streq(new->label, label)) {
  34                         new->deleted = 0;
  35                         return;
  36                 }
  37
  38         new = xmalloc(sizeof(*new));
  39         memset(new, 0, sizeof(*new));
  40         new->label = label;
  41         new->next = *labels;
  42         *labels = new;
  43 }
  44
  45 void delete_labels(struct label **labels)
  46 {
  47         struct label *label;
  48
  49         for_each_label(*labels, label)
  50                 label->deleted = 1;
  51 }
  52
  53 struct property *build_property(char *name, struct data val)
  54 {
  55         struct property *new = xmalloc(sizeof(*new));
  56
  57         memset(new, 0, sizeof(*new));
  58
  59         new->name = name;
  60         new->val = val;
  61
  62         return new;
  63 }
  64
  65 struct property *build_property_delete(char *name)
  66 {
  67         struct property *new = xmalloc(sizeof(*new));
  68
  69         memset(new, 0, sizeof(*new));
  70
  71         new->name = name;
  72         new->deleted = 1;
  73
  74         return new;
  75 }
  76
  77 struct property *chain_property(struct property *first, struct property *list)
  78 {
  79         assert(first->next == NULL);
  80
  81         first->next = list;
  82         return first;
  83 }
  84
  85 struct property *reverse_properties(struct property *first)
  86 {
  87         struct property *p = first;
  88         struct property *head = NULL;
  89         struct property *next;
  90
  91         while (p) {
  92                 next = p->next;
  93                 p->next = head;
  94                 head = p;
  95                 p = next;
  96         }
  97         return head;
  98 }
  99
 100 struct node *build_node(struct property *proplist, struct node *children)
 101 {
 102         struct node *new = xmalloc(sizeof(*new));
 103         struct node *child;
 104
 105         memset(new, 0, sizeof(*new));
 106
 107         new->proplist = reverse_properties(proplist);
 108         new->children = children;
 109
 110         for_each_child(new, child) {
 111                 child->parent = new;
 112         }
 113
 114         return new;
 115 }
 116
 117 struct node *build_node_delete(void)
 118 {
 119         struct node *new = xmalloc(sizeof(*new));
 120
 121         memset(new, 0, sizeof(*new));
 122
 123         new->deleted = 1;
 124
 125         return new;
 126 }
 127
 128 struct node *name_node(struct node *node, char *name)
 129 {
 130         assert(node->name == NULL);
 131
 132         node->name = name;
 133
 134         return node;
 135 }
 136
 137 struct node *merge_nodes(struct node *old_node, struct node *new_node)
 138 {
 139         struct property *new_prop, *old_prop;
 140         struct node *new_child, *old_child;
 141         struct label *l;
 142
 143         old_node->deleted = 0;
 144
 145         /* Add new node labels to old node */
 146         for_each_label_withdel(new_node->labels, l)
 147                 add_label(&old_node->labels, l->label);
 148
 149         /* Move properties from the new node to the old node.  If there
 150          * is a collision, replace the old value with the new */
 151         while (new_node->proplist) {
 152                 /* Pop the property off the list */
 153                 new_prop = new_node->proplist;
 154                 new_node->proplist = new_prop->next;
 155                 new_prop->next = NULL;
 156
 157                 if (new_prop->deleted) {
 158                         delete_property_by_name(old_node, new_prop->name);
 159                         free(new_prop);
 160                         continue;
 161                 }
 162
 163                 /* Look for a collision, set new value if there is */
 164                 for_each_property_withdel(old_node, old_prop) {
 165                         if (streq(old_prop->name, new_prop->name)) {
 166                                 /* Add new labels to old property */
 167                                 for_each_label_withdel(new_prop->labels, l)
 168                                         add_label(&old_prop->labels, l->label);
 169
 170                                 old_prop->val = new_prop->val;
 171                                 old_prop->deleted = 0;
 172                                 free(new_prop);
 173                                 new_prop = NULL;
 174                                 break;
 175                         }
 176                 }
 177
 178                 /* if no collision occurred, add property to the old node. */
 179                 if (new_prop)
 180                         add_property(old_node, new_prop);
 181         }
 182
 183         /* Move the override child nodes into the primary node.  If
 184          * there is a collision, then merge the nodes. */
 185         while (new_node->children) {
 186                 /* Pop the child node off the list */
 187                 new_child = new_node->children;
 188                 new_node->children = new_child->next_sibling;
 189                 new_child->parent = NULL;
 190                 new_child->next_sibling = NULL;
 191
 192                 if (new_child->deleted) {
 193                         delete_node_by_name(old_node, new_child->name);
 194                         free(new_child);
 195                         continue;
 196                 }
 197
 198                 /* Search for a collision.  Merge if there is */
 199                 for_each_child_withdel(old_node, old_child) {
 200                         if (streq(old_child->name, new_child->name)) {
 201                                 merge_nodes(old_child, new_child);
 202                                 new_child = NULL;
 203                                 break;
 204                         }
 205                 }
 206
 207                 /* if no collision occurred, add child to the old node. */
 208                 if (new_child)
 209                         add_child(old_node, new_child);
 210         }
 211
 212         /* The new node contents are now merged into the old node.  Free
 213          * the new node. */
 214         free(new_node);
 215
 216         return old_node;
 217 }
 218
 219 void add_orphan_node(struct node *dt, struct node *new_node, char *ref)
 220 {
 221         static unsigned int next_orphan_fragment = 0;
 222         struct node *node;
 223         struct property *p;
 224         struct data d = empty_data;
 225         char *name;
 226
 227         d = data_add_marker(d, REF_PHANDLE, ref);
 228         d = data_append_integer(d, 0xffffffff, 32);
 229
 230         p = build_property("target", d);
 231
 232         xasprintf(&name, "fragment@%u",
 233                         next_orphan_fragment++);
 234         name_node(new_node, "__overlay__");
 235         node = build_node(p, new_node);
 236         name_node(node, name);
 237
 238         add_child(dt, node);
 239 }
 240
 241 struct node *chain_node(struct node *first, struct node *list)
 242 {
 243         assert(first->next_sibling == NULL);
 244
 245         first->next_sibling = list;
 246         return first;
 247 }
 248
 249 void add_property(struct node *node, struct property *prop)
 250 {
 251         struct property **p;
 252
 253         prop->next = NULL;
 254
 255         p = &node->proplist;
 256         while (*p)
 257                 p = &((*p)->next);
 258
 259         *p = prop;
 260 }
 261
 262 void delete_property_by_name(struct node *node, char *name)
 263 {
 264         struct property *prop = node->proplist;
 265
 266         while (prop) {
 267                 if (streq(prop->name, name)) {
 268                         delete_property(prop);
 269                         return;
 270                 }
 271                 prop = prop->next;
 272         }
 273 }
 274
 275 void delete_property(struct property *prop)
 276 {
 277         prop->deleted = 1;
 278         delete_labels(&prop->labels);
 279 }
 280
 281 void add_child(struct node *parent, struct node *child)
 282 {
 283         struct node **p;
 284
 285         child->next_sibling = NULL;
 286         child->parent = parent;
 287
 288         p = &parent->children;
 289         while (*p)
 290                 p = &((*p)->next_sibling);
 291
 292         *p = child;
 293 }
 294
 295 void delete_node_by_name(struct node *parent, char *name)
 296 {
 297         struct node *node = parent->children;
 298
 299         while (node) {
 300                 if (streq(node->name, name)) {
 301                         delete_node(node);
 302                         return;
 303                 }
 304                 node = node->next_sibling;
 305         }
 306 }
 307
 308 void delete_node(struct node *node)
 309 {
 310         struct property *prop;
 311         struct node *child;
 312
 313         node->deleted = 1;
 314         for_each_child(node, child)
 315                 delete_node(child);
 316         for_each_property(node, prop)
 317                 delete_property(prop);
 318         delete_labels(&node->labels);
 319 }
 320
 321 void append_to_property(struct node *node,
 322                                     char *name, const void *data, int len)
 323 {
 324         struct data d;
 325         struct property *p;
 326
 327         p = get_property(node, name);
 328         if (p) {
 329                 d = data_append_data(p->val, data, len);
 330                 p->val = d;
 331         } else {
 332                 d = data_append_data(empty_data, data, len);
 333                 p = build_property(name, d);
 334                 add_property(node, p);
 335         }
 336 }
 337
 338 struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size)
 339 {
 340         struct reserve_info *new = xmalloc(sizeof(*new));
 341
 342         memset(new, 0, sizeof(*new));
 343
 344         new->address = address;
 345         new->size = size;
 346
 347         return new;
 348 }
 349
 350 struct reserve_info *chain_reserve_entry(struct reserve_info *first,
 351                                         struct reserve_info *list)
 352 {
 353         assert(first->next == NULL);
 354
 355         first->next = list;
 356         return first;
 357 }
 358
 359 struct reserve_info *add_reserve_entry(struct reserve_info *list,
 360                                       struct reserve_info *new)
 361 {
 362         struct reserve_info *last;
 363
 364         new->next = NULL;
 365
 366         if (! list)
 367                 return new;
 368
 369         for (last = list; last->next; last = last->next)
 370                 ;
 371
 372         last->next = new;
 373
 374         return list;
 375 }
 376
 377 struct dt_info *build_dt_info(unsigned int dtsflags,
 378                               struct reserve_info *reservelist,
 379                               struct node *tree, uint32_t boot_cpuid_phys)
 380 {
 381         struct dt_info *dti;
 382
 383         dti = xmalloc(sizeof(*dti));
 384         dti->dtsflags = dtsflags;
 385         dti->reservelist = reservelist;
 386         dti->dt = tree;
 387         dti->boot_cpuid_phys = boot_cpuid_phys;
 388
 389         return dti;
 390 }
 391
 392 /*
 393  * Tree accessor functions
 394  */
 395
 396 const char *get_unitname(struct node *node)
 397 {
 398         if (node->name[node->basenamelen] == '\0')
 399                 return "";
 400         else
 401                 return node->name + node->basenamelen + 1;
 402 }
 403
 404 struct property *get_property(struct node *node, const char *propname)
 405 {
 406         struct property *prop;
 407
 408         for_each_property(node, prop)
 409                 if (streq(prop->name, propname))
 410                         return prop;
 411
 412         return NULL;
 413 }
 414
 415 cell_t propval_cell(struct property *prop)
 416 {
 417         assert(prop->val.len == sizeof(cell_t));
 418         return fdt32_to_cpu(*((fdt32_t *)prop->val.val));
 419 }
 420
 421 cell_t propval_cell_n(struct property *prop, int n)
 422 {
 423         assert(prop->val.len / sizeof(cell_t) >= n);
 424         return fdt32_to_cpu(*((fdt32_t *)prop->val.val + n));
 425 }
 426
 427 struct property *get_property_by_label(struct node *tree, const char *label,
 428                                        struct node **node)
 429 {
 430         struct property *prop;
 431         struct node *c;
 432
 433         *node = tree;
 434
 435         for_each_property(tree, prop) {
 436                 struct label *l;
 437
 438                 for_each_label(prop->labels, l)
 439                         if (streq(l->label, label))
 440                                 return prop;
 441         }
 442
 443         for_each_child(tree, c) {
 444                 prop = get_property_by_label(c, label, node);
 445                 if (prop)
 446                         return prop;
 447         }
 448
 449         *node = NULL;
 450         return NULL;
 451 }
 452
 453 struct marker *get_marker_label(struct node *tree, const char *label,
 454                                 struct node **node, struct property **prop)
 455 {
 456         struct marker *m;
 457         struct property *p;
 458         struct node *c;
 459
 460         *node = tree;
 461
 462         for_each_property(tree, p) {
 463                 *prop = p;
 464                 m = p->val.markers;
 465                 for_each_marker_of_type(m, LABEL)
 466                         if (streq(m->ref, label))
 467                                 return m;
 468         }
 469
 470         for_each_child(tree, c) {
 471                 m = get_marker_label(c, label, node, prop);
 472                 if (m)
 473                         return m;
 474         }
 475
 476         *prop = NULL;
 477         *node = NULL;
 478         return NULL;
 479 }
 480
 481 struct node *get_subnode(struct node *node, const char *nodename)
 482 {
 483         struct node *child;
 484
 485         for_each_child(node, child)
 486                 if (streq(child->name, nodename))
 487                         return child;
 488
 489         return NULL;
 490 }
 491
 492 struct node *get_node_by_path(struct node *tree, const char *path)
 493 {
 494         const char *p;
 495         struct node *child;
 496
 497         if (!path || ! (*path)) {
 498                 if (tree->deleted)
 499                         return NULL;
 500                 return tree;
 501         }
 502
 503         while (path[0] == '/')
 504                 path++;
 505
 506         p = strchr(path, '/');
 507
 508         for_each_child(tree, child) {
 509                 if (p && (strlen(child->name) == p-path) &&
 510                                 strneq(path, child->name, p-path))
 511                         return get_node_by_path(child, p+1);
 512                 else if (!p && streq(path, child->name))
 513                         return child;
 514         }
 515
 516         return NULL;
 517 }
 518
 519 struct node *get_node_by_label(struct node *tree, const char *label)
 520 {
 521         struct node *child, *node;
 522         struct label *l;
 523
 524         assert(label && (strlen(label) > 0));
 525
 526         for_each_label(tree->labels, l)
 527                 if (streq(l->label, label))
 528                         return tree;
 529
 530         for_each_child(tree, child) {
 531                 node = get_node_by_label(child, label);
 532                 if (node)
 533                         return node;
 534         }
 535
 536         return NULL;
 537 }
 538
 539 struct node *get_node_by_phandle(struct node *tree, cell_t phandle)
 540 {
 541         struct node *child, *node;
 542
 543         assert((phandle != 0) && (phandle != -1));
 544
 545         if (tree->phandle == phandle) {
 546                 if (tree->deleted)
 547                         return NULL;
 548                 return tree;
 549         }
 550
 551         for_each_child(tree, child) {
 552                 node = get_node_by_phandle(child, phandle);
 553                 if (node)
 554                         return node;
 555         }
 556
 557         return NULL;
 558 }
 559
 560 struct node *get_node_by_ref(struct node *tree, const char *ref)
 561 {
 562         if (streq(ref, "/"))
 563                 return tree;
 564         else if (ref[0] == '/')
 565                 return get_node_by_path(tree, ref);
 566         else
 567                 return get_node_by_label(tree, ref);
 568 }
 569
 570 cell_t get_node_phandle(struct node *root, struct node *node)
 571 {
 572         static cell_t phandle = 1; /* FIXME: ick, static local */
 573
 574         if ((node->phandle != 0) && (node->phandle != -1))
 575                 return node->phandle;
 576
 577         while (get_node_by_phandle(root, phandle))
 578                 phandle++;
 579
 580         node->phandle = phandle;
 581
 582         if (!get_property(node, "linux,phandle")
 583             && (phandle_format & PHANDLE_LEGACY))
 584                 add_property(node,
 585                              build_property("linux,phandle",
 586                                             data_append_cell(empty_data, phandle)));
 587
 588         if (!get_property(node, "phandle")
 589             && (phandle_format & PHANDLE_EPAPR))
 590                 add_property(node,
 591                              build_property("phandle",
 592                                             data_append_cell(empty_data, phandle)));
 593
 594         /* If the node *does* have a phandle property, we must
 595          * be dealing with a self-referencing phandle, which will be
 596          * fixed up momentarily in the caller */
 597
 598         return node->phandle;
 599 }
 600
 601 uint32_t guess_boot_cpuid(struct node *tree)
 602 {
 603         struct node *cpus, *bootcpu;
 604         struct property *reg;
 605
 606         cpus = get_node_by_path(tree, "/cpus");
 607         if (!cpus)
 608                 return 0;
 609
 610
 611         bootcpu = cpus->children;
 612         if (!bootcpu)
 613                 return 0;
 614
 615         reg = get_property(bootcpu, "reg");
 616         if (!reg || (reg->val.len != sizeof(uint32_t)))
 617                 return 0;
 618
 619         /* FIXME: Sanity check node? */
 620
 621         return propval_cell(reg);
 622 }
 623
 624 static int cmp_reserve_info(const void *ax, const void *bx)
 625 {
 626         const struct reserve_info *a, *b;
 627
 628         a = *((const struct reserve_info * const *)ax);
 629         b = *((const struct reserve_info * const *)bx);
 630
 631         if (a->address < b->address)
 632                 return -1;
 633         else if (a->address > b->address)
 634                 return 1;
 635         else if (a->size < b->size)
 636                 return -1;
 637         else if (a->size > b->size)
 638                 return 1;
 639         else
 640                 return 0;
 641 }
 642
 643 static void sort_reserve_entries(struct dt_info *dti)
 644 {
 645         struct reserve_info *ri, **tbl;
 646         int n = 0, i = 0;
 647
 648         for (ri = dti->reservelist;
 649              ri;
 650              ri = ri->next)
 651                 n++;
 652
 653         if (n == 0)
 654                 return;
 655
 656         tbl = xmalloc(n * sizeof(*tbl));
 657
 658         for (ri = dti->reservelist;
 659              ri;
 660              ri = ri->next)
 661                 tbl[i++] = ri;
 662
 663         qsort(tbl, n, sizeof(*tbl), cmp_reserve_info);
 664
 665         dti->reservelist = tbl[0];
 666         for (i = 0; i < (n-1); i++)
 667                 tbl[i]->next = tbl[i+1];
 668         tbl[n-1]->next = NULL;
 669
 670         free(tbl);
 671 }
 672
 673 static int cmp_prop(const void *ax, const void *bx)
 674 {
 675         const struct property *a, *b;
 676
 677         a = *((const struct property * const *)ax);
 678         b = *((const struct property * const *)bx);
 679
 680         return strcmp(a->name, b->name);
 681 }
 682
 683 static void sort_properties(struct node *node)
 684 {
 685         int n = 0, i = 0;
 686         struct property *prop, **tbl;
 687
 688         for_each_property_withdel(node, prop)
 689                 n++;
 690
 691         if (n == 0)
 692                 return;
 693
 694         tbl = xmalloc(n * sizeof(*tbl));
 695
 696         for_each_property_withdel(node, prop)
 697                 tbl[i++] = prop;
 698
 699         qsort(tbl, n, sizeof(*tbl), cmp_prop);
 700
 701         node->proplist = tbl[0];
 702         for (i = 0; i < (n-1); i++)
 703                 tbl[i]->next = tbl[i+1];
 704         tbl[n-1]->next = NULL;
 705
 706         free(tbl);
 707 }
 708
 709 static int cmp_subnode(const void *ax, const void *bx)
 710 {
 711         const struct node *a, *b;
 712
 713         a = *((const struct node * const *)ax);
 714         b = *((const struct node * const *)bx);
 715
 716         return strcmp(a->name, b->name);
 717 }
 718
 719 static void sort_subnodes(struct node *node)
 720 {
 721         int n = 0, i = 0;
 722         struct node *subnode, **tbl;
 723
 724         for_each_child_withdel(node, subnode)
 725                 n++;
 726
 727         if (n == 0)
 728                 return;
 729
 730         tbl = xmalloc(n * sizeof(*tbl));
 731
 732         for_each_child_withdel(node, subnode)
 733                 tbl[i++] = subnode;
 734
 735         qsort(tbl, n, sizeof(*tbl), cmp_subnode);
 736
 737         node->children = tbl[0];
 738         for (i = 0; i < (n-1); i++)
 739                 tbl[i]->next_sibling = tbl[i+1];
 740         tbl[n-1]->next_sibling = NULL;
 741
 742         free(tbl);
 743 }
 744
 745 static void sort_node(struct node *node)
 746 {
 747         struct node *c;
 748
 749         sort_properties(node);
 750         sort_subnodes(node);
 751         for_each_child_withdel(node, c)
 752                 sort_node(c);
 753 }
 754
 755 void sort_tree(struct dt_info *dti)
 756 {
 757         sort_reserve_entries(dti);
 758         sort_node(dti->dt);
 759 }
 760
 761 /* utility helper to avoid code duplication */
 762 static struct node *build_and_name_child_node(struct node *parent, char *name)
 763 {
 764         struct node *node;
 765
 766         node = build_node(NULL, NULL);
 767         name_node(node, xstrdup(name));
 768         add_child(parent, node);
 769
 770         return node;
 771 }
 772
 773 static struct node *build_root_node(struct node *dt, char *name)
 774 {
 775         struct node *an;
 776
 777         an = get_subnode(dt, name);
 778         if (!an)
 779                 an = build_and_name_child_node(dt, name);
 780
 781         if (!an)
 782                 die("Could not build root node /%s\n", name);
 783
 784         return an;
 785 }
 786
 787 static bool any_label_tree(struct dt_info *dti, struct node *node)
 788 {
 789         struct node *c;
 790
 791         if (node->labels)
 792                 return true;
 793
 794         for_each_child(node, c)
 795                 if (any_label_tree(dti, c))
 796                         return true;
 797
 798         return false;
 799 }
 800
 801 static void generate_label_tree_internal(struct dt_info *dti,
 802                                          struct node *an, struct node *node,
 803                                          bool allocph)
 804 {
 805         struct node *dt = dti->dt;
 806         struct node *c;
 807         struct property *p;
 808         struct label *l;
 809
 810         /* if there are labels */
 811         if (node->labels) {
 812
 813                 /* now add the label in the node */
 814                 for_each_label(node->labels, l) {
 815
 816                         /* check whether the label already exists */
 817                         p = get_property(an, l->label);
 818                         if (p) {
 819                                 fprintf(stderr, "WARNING: label %s already"
 820                                         " exists in /%s", l->label,
 821                                         an->name);
 822                                 continue;
 823                         }
 824
 825                         /* insert it */
 826                         p = build_property(l->label,
 827                                 data_copy_mem(node->fullpath,
 828                                                 strlen(node->fullpath) + 1));
 829                         add_property(an, p);
 830                 }
 831
 832                 /* force allocation of a phandle for this node */
 833                 if (allocph)
 834                         (void)get_node_phandle(dt, node);
 835         }
 836
 837         for_each_child(node, c)
 838                 generate_label_tree_internal(dti, an, c, allocph);
 839 }
 840
 841 static bool any_fixup_tree(struct dt_info *dti, struct node *node)
 842 {
 843         struct node *c;
 844         struct property *prop;
 845         struct marker *m;
 846
 847         for_each_property(node, prop) {
 848                 m = prop->val.markers;
 849                 for_each_marker_of_type(m, REF_PHANDLE) {
 850                         if (!get_node_by_ref(dti->dt, m->ref))
 851                                 return true;
 852                 }
 853         }
 854
 855         for_each_child(node, c) {
 856                 if (any_fixup_tree(dti, c))
 857                         return true;
 858         }
 859
 860         return false;
 861 }
 862
 863 static void add_fixup_entry(struct dt_info *dti, struct node *fn,
 864                             struct node *node, struct property *prop,
 865                             struct marker *m)
 866 {
 867         char *entry;
 868
 869         /* m->ref can only be a REF_PHANDLE, but check anyway */
 870         assert(m->type == REF_PHANDLE);
 871
 872         /* there shouldn't be any ':' in the arguments */
 873         if (strchr(node->fullpath, ':') || strchr(prop->name, ':'))
 874                 die("arguments should not contain ':'\n");
 875
 876         xasprintf(&entry, "%s:%s:%u",
 877                         node->fullpath, prop->name, m->offset);
 878         append_to_property(fn, m->ref, entry, strlen(entry) + 1);
 879
 880         free(entry);
 881 }
 882
 883 static void generate_fixups_tree_internal(struct dt_info *dti,
 884                                           struct node *fn,
 885                                           struct node *node)
 886 {
 887         struct node *dt = dti->dt;
 888         struct node *c;
 889         struct property *prop;
 890         struct marker *m;
 891         struct node *refnode;
 892
 893         for_each_property(node, prop) {
 894                 m = prop->val.markers;
 895                 for_each_marker_of_type(m, REF_PHANDLE) {
 896                         refnode = get_node_by_ref(dt, m->ref);
 897                         if (!refnode)
 898                                 add_fixup_entry(dti, fn, node, prop, m);
 899                 }
 900         }
 901
 902         for_each_child(node, c)
 903                 generate_fixups_tree_internal(dti, fn, c);
 904 }
 905
 906 static bool any_local_fixup_tree(struct dt_info *dti, struct node *node)
 907 {
 908         struct node *c;
 909         struct property *prop;
 910         struct marker *m;
 911
 912         for_each_property(node, prop) {
 913                 m = prop->val.markers;
 914                 for_each_marker_of_type(m, REF_PHANDLE) {
 915                         if (get_node_by_ref(dti->dt, m->ref))
 916                                 return true;
 917                 }
 918         }
 919
 920         for_each_child(node, c) {
 921                 if (any_local_fixup_tree(dti, c))
 922                         return true;
 923         }
 924
 925         return false;
 926 }
 927
 928 static void add_local_fixup_entry(struct dt_info *dti,
 929                 struct node *lfn, struct node *node,
 930                 struct property *prop, struct marker *m,
 931                 struct node *refnode)
 932 {
 933         struct node *wn, *nwn;  /* local fixup node, walk node, new */
 934         fdt32_t value_32;
 935         char **compp;
 936         int i, depth;
 937
 938         /* walk back retreiving depth */
 939         depth = 0;
 940         for (wn = node; wn; wn = wn->parent)
 941                 depth++;
 942
 943         /* allocate name array */
 944         compp = xmalloc(sizeof(*compp) * depth);
 945
 946         /* store names in the array */
 947         for (wn = node, i = depth - 1; wn; wn = wn->parent, i--)
 948                 compp[i] = wn->name;
 949
 950         /* walk the path components creating nodes if they don't exist */
 951         for (wn = lfn, i = 1; i < depth; i++, wn = nwn) {
 952                 /* if no node exists, create it */
 953                 nwn = get_subnode(wn, compp[i]);
 954                 if (!nwn)
 955                         nwn = build_and_name_child_node(wn, compp[i]);
 956         }
 957
 958         free(compp);
 959
 960         value_32 = cpu_to_fdt32(m->offset);
 961         append_to_property(wn, prop->name, &value_32, sizeof(value_32));
 962 }
 963
 964 static void generate_local_fixups_tree_internal(struct dt_info *dti,
 965                                                 struct node *lfn,
 966                                                 struct node *node)
 967 {
 968         struct node *dt = dti->dt;
 969         struct node *c;
 970         struct property *prop;
 971         struct marker *m;
 972         struct node *refnode;
 973
 974         for_each_property(node, prop) {
 975                 m = prop->val.markers;
 976                 for_each_marker_of_type(m, REF_PHANDLE) {
 977                         refnode = get_node_by_ref(dt, m->ref);
 978                         if (refnode)
 979                                 add_local_fixup_entry(dti, lfn, node, prop, m, refnode);
 980                 }
 981         }
 982
 983         for_each_child(node, c)
 984                 generate_local_fixups_tree_internal(dti, lfn, c);
 985 }
 986
 987 void generate_label_tree(struct dt_info *dti, char *name, bool allocph)
 988 {
 989         if (!any_label_tree(dti, dti->dt))
 990                 return;
 991         generate_label_tree_internal(dti, build_root_node(dti->dt, name),
 992                                      dti->dt, allocph);
 993 }
 994
 995 void generate_fixups_tree(struct dt_info *dti, char *name)
 996 {
 997         if (!any_fixup_tree(dti, dti->dt))
 998                 return;
 999         generate_fixups_tree_internal(dti, build_root_node(dti->dt, name),
1000                                       dti->dt);
1001 }
1002
1003 void generate_local_fixups_tree(struct dt_info *dti, char *name)
1004 {
1005         if (!any_local_fixup_tree(dti, dti->dt))
1006                 return;
1007         generate_local_fixups_tree_internal(dti, build_root_node(dti->dt, name),
1008                                             dti->dt);
1009 }