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