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 *omit_node_if_unused(struct node *node)
 138 {
 139         node->omit_if_unused = 1;
 140
 141         return node;
 142 }
 143
 144 struct node *reference_node(struct node *node)
 145 {
 146         node->is_referenced = 1;
 147
 148         return node;
 149 }
 150
 151 struct node *merge_nodes(struct node *old_node, struct node *new_node)
 152 {
 153         struct property *new_prop, *old_prop;
 154         struct node *new_child, *old_child;
 155         struct label *l;
 156
 157         old_node->deleted = 0;
 158
 159         /* Add new node labels to old node */
 160         for_each_label_withdel(new_node->labels, l)
 161                 add_label(&old_node->labels, l->label);
 162
 163         /* Move properties from the new node to the old node.  If there
 164          * is a collision, replace the old value with the new */
 165         while (new_node->proplist) {
 166                 /* Pop the property off the list */
 167                 new_prop = new_node->proplist;
 168                 new_node->proplist = new_prop->next;
 169                 new_prop->next = NULL;
 170
 171                 if (new_prop->deleted) {
 172                         delete_property_by_name(old_node, new_prop->name);
 173                         free(new_prop);
 174                         continue;
 175                 }
 176
 177                 /* Look for a collision, set new value if there is */
 178                 for_each_property_withdel(old_node, old_prop) {
 179                         if (streq(old_prop->name, new_prop->name)) {
 180                                 /* Add new labels to old property */
 181                                 for_each_label_withdel(new_prop->labels, l)
 182                                         add_label(&old_prop->labels, l->label);
 183
 184                                 old_prop->val = new_prop->val;
 185                                 old_prop->deleted = 0;
 186                                 free(new_prop);
 187                                 new_prop = NULL;
 188                                 break;
 189                         }
 190                 }
 191
 192                 /* if no collision occurred, add property to the old node. */
 193                 if (new_prop)
 194                         add_property(old_node, new_prop);
 195         }
 196
 197         /* Move the override child nodes into the primary node.  If
 198          * there is a collision, then merge the nodes. */
 199         while (new_node->children) {
 200                 /* Pop the child node off the list */
 201                 new_child = new_node->children;
 202                 new_node->children = new_child->next_sibling;
 203                 new_child->parent = NULL;
 204                 new_child->next_sibling = NULL;
 205
 206                 if (new_child->deleted) {
 207                         delete_node_by_name(old_node, new_child->name);
 208                         free(new_child);
 209                         continue;
 210                 }
 211
 212                 /* Search for a collision.  Merge if there is */
 213                 for_each_child_withdel(old_node, old_child) {
 214                         if (streq(old_child->name, new_child->name)) {
 215                                 merge_nodes(old_child, new_child);
 216                                 new_child = NULL;
 217                                 break;
 218                         }
 219                 }
 220
 221                 /* if no collision occurred, add child to the old node. */
 222                 if (new_child)
 223                         add_child(old_node, new_child);
 224         }
 225
 226         /* The new node contents are now merged into the old node.  Free
 227          * the new node. */
 228         free(new_node);
 229
 230         return old_node;
 231 }
 232
 233 struct node * add_orphan_node(struct node *dt, struct node *new_node, char *ref)
 234 {
 235         static unsigned int next_orphan_fragment = 0;
 236         struct node *node;
 237         struct property *p;
 238         struct data d = empty_data;
 239         char *name;
 240
 241         if (ref[0] == '/') {
 242                 d = data_append_data(d, ref, strlen(ref) + 1);
 243
 244                 p = build_property("target-path", d);
 245         } else {
 246                 d = data_add_marker(d, REF_PHANDLE, ref);
 247                 d = data_append_integer(d, 0xffffffff, 32);
 248
 249                 p = build_property("target", d);
 250         }
 251
 252         xasprintf(&name, "fragment@%u",
 253                         next_orphan_fragment++);
 254         name_node(new_node, "__overlay__");
 255         node = build_node(p, new_node);
 256         name_node(node, name);
 257
 258         add_child(dt, node);
 259         return dt;
 260 }
 261
 262 struct node *chain_node(struct node *first, struct node *list)
 263 {
 264         assert(first->next_sibling == NULL);
 265
 266         first->next_sibling = list;
 267         return first;
 268 }
 269
 270 void add_property(struct node *node, struct property *prop)
 271 {
 272         struct property **p;
 273
 274         prop->next = NULL;
 275
 276         p = &node->proplist;
 277         while (*p)
 278                 p = &((*p)->next);
 279
 280         *p = prop;
 281 }
 282
 283 void delete_property_by_name(struct node *node, char *name)
 284 {
 285         struct property *prop = node->proplist;
 286
 287         while (prop) {
 288                 if (streq(prop->name, name)) {
 289                         delete_property(prop);
 290                         return;
 291                 }
 292                 prop = prop->next;
 293         }
 294 }
 295
 296 void delete_property(struct property *prop)
 297 {
 298         prop->deleted = 1;
 299         delete_labels(&prop->labels);
 300 }
 301
 302 void add_child(struct node *parent, struct node *child)
 303 {
 304         struct node **p;
 305
 306         child->next_sibling = NULL;
 307         child->parent = parent;
 308
 309         p = &parent->children;
 310         while (*p)
 311                 p = &((*p)->next_sibling);
 312
 313         *p = child;
 314 }
 315
 316 void delete_node_by_name(struct node *parent, char *name)
 317 {
 318         struct node *node = parent->children;
 319
 320         while (node) {
 321                 if (streq(node->name, name)) {
 322                         delete_node(node);
 323                         return;
 324                 }
 325                 node = node->next_sibling;
 326         }
 327 }
 328
 329 void delete_node(struct node *node)
 330 {
 331         struct property *prop;
 332         struct node *child;
 333
 334         node->deleted = 1;
 335         for_each_child(node, child)
 336                 delete_node(child);
 337         for_each_property(node, prop)
 338                 delete_property(prop);
 339         delete_labels(&node->labels);
 340 }
 341
 342 void append_to_property(struct node *node,
 343                                     char *name, const void *data, int len)
 344 {
 345         struct data d;
 346         struct property *p;
 347
 348         p = get_property(node, name);
 349         if (p) {
 350                 d = data_append_data(p->val, data, len);
 351                 p->val = d;
 352         } else {
 353                 d = data_append_data(empty_data, data, len);
 354                 p = build_property(name, d);
 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, 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 && (strlen(child->name) == p-path) &&
 531                     strprefixeq(path, p - path, child->name))
 532                         return get_node_by_path(child, p+1);
 533                 else if (!p && streq(path, child->name))
 534                         return child;
 535         }
 536
 537         return NULL;
 538 }
 539
 540 struct node *get_node_by_label(struct node *tree, const char *label)
 541 {
 542         struct node *child, *node;
 543         struct label *l;
 544
 545         assert(label && (strlen(label) > 0));
 546
 547         for_each_label(tree->labels, l)
 548                 if (streq(l->label, label))
 549                         return tree;
 550
 551         for_each_child(tree, child) {
 552                 node = get_node_by_label(child, label);
 553                 if (node)
 554                         return node;
 555         }
 556
 557         return NULL;
 558 }
 559
 560 struct node *get_node_by_phandle(struct node *tree, cell_t phandle)
 561 {
 562         struct node *child, *node;
 563
 564         if ((phandle == 0) || (phandle == -1)) {
 565                 assert(generate_fixups);
 566                 return NULL;
 567         }
 568
 569         if (tree->phandle == phandle) {
 570                 if (tree->deleted)
 571                         return NULL;
 572                 return tree;
 573         }
 574
 575         for_each_child(tree, child) {
 576                 node = get_node_by_phandle(child, phandle);
 577                 if (node)
 578                         return node;
 579         }
 580
 581         return NULL;
 582 }
 583
 584 struct node *get_node_by_ref(struct node *tree, const char *ref)
 585 {
 586         if (streq(ref, "/"))
 587                 return tree;
 588         else if (ref[0] == '/')
 589                 return get_node_by_path(tree, ref);
 590         else
 591                 return get_node_by_label(tree, ref);
 592 }
 593
 594 cell_t get_node_phandle(struct node *root, struct node *node)
 595 {
 596         static cell_t phandle = 1; /* FIXME: ick, static local */
 597
 598         if ((node->phandle != 0) && (node->phandle != -1))
 599                 return node->phandle;
 600
 601         while (get_node_by_phandle(root, phandle))
 602                 phandle++;
 603
 604         node->phandle = phandle;
 605
 606         if (!get_property(node, "linux,phandle")
 607             && (phandle_format & PHANDLE_LEGACY))
 608                 add_property(node,
 609                              build_property("linux,phandle",
 610                                             data_append_cell(empty_data, phandle)));
 611
 612         if (!get_property(node, "phandle")
 613             && (phandle_format & PHANDLE_EPAPR))
 614                 add_property(node,
 615                              build_property("phandle",
 616                                             data_append_cell(empty_data, phandle)));
 617
 618         /* If the node *does* have a phandle property, we must
 619          * be dealing with a self-referencing phandle, which will be
 620          * fixed up momentarily in the caller */
 621
 622         return node->phandle;
 623 }
 624
 625 uint32_t guess_boot_cpuid(struct node *tree)
 626 {
 627         struct node *cpus, *bootcpu;
 628         struct property *reg;
 629
 630         cpus = get_node_by_path(tree, "/cpus");
 631         if (!cpus)
 632                 return 0;
 633
 634
 635         bootcpu = cpus->children;
 636         if (!bootcpu)
 637                 return 0;
 638
 639         reg = get_property(bootcpu, "reg");
 640         if (!reg || (reg->val.len != sizeof(uint32_t)))
 641                 return 0;
 642
 643         /* FIXME: Sanity check node? */
 644
 645         return propval_cell(reg);
 646 }
 647
 648 static int cmp_reserve_info(const void *ax, const void *bx)
 649 {
 650         const struct reserve_info *a, *b;
 651
 652         a = *((const struct reserve_info * const *)ax);
 653         b = *((const struct reserve_info * const *)bx);
 654
 655         if (a->address < b->address)
 656                 return -1;
 657         else if (a->address > b->address)
 658                 return 1;
 659         else if (a->size < b->size)
 660                 return -1;
 661         else if (a->size > b->size)
 662                 return 1;
 663         else
 664                 return 0;
 665 }
 666
 667 static void sort_reserve_entries(struct dt_info *dti)
 668 {
 669         struct reserve_info *ri, **tbl;
 670         int n = 0, i = 0;
 671
 672         for (ri = dti->reservelist;
 673              ri;
 674              ri = ri->next)
 675                 n++;
 676
 677         if (n == 0)
 678                 return;
 679
 680         tbl = xmalloc(n * sizeof(*tbl));
 681
 682         for (ri = dti->reservelist;
 683              ri;
 684              ri = ri->next)
 685                 tbl[i++] = ri;
 686
 687         qsort(tbl, n, sizeof(*tbl), cmp_reserve_info);
 688
 689         dti->reservelist = tbl[0];
 690         for (i = 0; i < (n-1); i++)
 691                 tbl[i]->next = tbl[i+1];
 692         tbl[n-1]->next = NULL;
 693
 694         free(tbl);
 695 }
 696
 697 static int cmp_prop(const void *ax, const void *bx)
 698 {
 699         const struct property *a, *b;
 700
 701         a = *((const struct property * const *)ax);
 702         b = *((const struct property * const *)bx);
 703
 704         return strcmp(a->name, b->name);
 705 }
 706
 707 static void sort_properties(struct node *node)
 708 {
 709         int n = 0, i = 0;
 710         struct property *prop, **tbl;
 711
 712         for_each_property_withdel(node, prop)
 713                 n++;
 714
 715         if (n == 0)
 716                 return;
 717
 718         tbl = xmalloc(n * sizeof(*tbl));
 719
 720         for_each_property_withdel(node, prop)
 721                 tbl[i++] = prop;
 722
 723         qsort(tbl, n, sizeof(*tbl), cmp_prop);
 724
 725         node->proplist = tbl[0];
 726         for (i = 0; i < (n-1); i++)
 727                 tbl[i]->next = tbl[i+1];
 728         tbl[n-1]->next = NULL;
 729
 730         free(tbl);
 731 }
 732
 733 static int cmp_subnode(const void *ax, const void *bx)
 734 {
 735         const struct node *a, *b;
 736
 737         a = *((const struct node * const *)ax);
 738         b = *((const struct node * const *)bx);
 739
 740         return strcmp(a->name, b->name);
 741 }
 742
 743 static void sort_subnodes(struct node *node)
 744 {
 745         int n = 0, i = 0;
 746         struct node *subnode, **tbl;
 747
 748         for_each_child_withdel(node, subnode)
 749                 n++;
 750
 751         if (n == 0)
 752                 return;
 753
 754         tbl = xmalloc(n * sizeof(*tbl));
 755
 756         for_each_child_withdel(node, subnode)
 757                 tbl[i++] = subnode;
 758
 759         qsort(tbl, n, sizeof(*tbl), cmp_subnode);
 760
 761         node->children = tbl[0];
 762         for (i = 0; i < (n-1); i++)
 763                 tbl[i]->next_sibling = tbl[i+1];
 764         tbl[n-1]->next_sibling = NULL;
 765
 766         free(tbl);
 767 }
 768
 769 static void sort_node(struct node *node)
 770 {
 771         struct node *c;
 772
 773         sort_properties(node);
 774         sort_subnodes(node);
 775         for_each_child_withdel(node, c)
 776                 sort_node(c);
 777 }
 778
 779 void sort_tree(struct dt_info *dti)
 780 {
 781         sort_reserve_entries(dti);
 782         sort_node(dti->dt);
 783 }
 784
 785 /* utility helper to avoid code duplication */
 786 static struct node *build_and_name_child_node(struct node *parent, char *name)
 787 {
 788         struct node *node;
 789
 790         node = build_node(NULL, NULL);
 791         name_node(node, xstrdup(name));
 792         add_child(parent, node);
 793
 794         return node;
 795 }
 796
 797 static struct node *build_root_node(struct node *dt, char *name)
 798 {
 799         struct node *an;
 800
 801         an = get_subnode(dt, name);
 802         if (!an)
 803                 an = build_and_name_child_node(dt, name);
 804
 805         if (!an)
 806                 die("Could not build root node /%s\n", name);
 807
 808         return an;
 809 }
 810
 811 static bool any_label_tree(struct dt_info *dti, struct node *node)
 812 {
 813         struct node *c;
 814
 815         if (node->labels)
 816                 return true;
 817
 818         for_each_child(node, c)
 819                 if (any_label_tree(dti, c))
 820                         return true;
 821
 822         return false;
 823 }
 824
 825 static void generate_label_tree_internal(struct dt_info *dti,
 826                                          struct node *an, struct node *node,
 827                                          bool allocph)
 828 {
 829         struct node *dt = dti->dt;
 830         struct node *c;
 831         struct property *p;
 832         struct label *l;
 833
 834         /* if there are labels */
 835         if (node->labels) {
 836
 837                 /* now add the label in the node */
 838                 for_each_label(node->labels, l) {
 839
 840                         /* check whether the label already exists */
 841                         p = get_property(an, l->label);
 842                         if (p) {
 843                                 fprintf(stderr, "WARNING: label %s already"
 844                                         " exists in /%s", l->label,
 845                                         an->name);
 846                                 continue;
 847                         }
 848
 849                         /* insert it */
 850                         p = build_property(l->label,
 851                                 data_copy_mem(node->fullpath,
 852                                                 strlen(node->fullpath) + 1));
 853                         add_property(an, p);
 854                 }
 855
 856                 /* force allocation of a phandle for this node */
 857                 if (allocph)
 858                         (void)get_node_phandle(dt, node);
 859         }
 860
 861         for_each_child(node, c)
 862                 generate_label_tree_internal(dti, an, c, allocph);
 863 }
 864
 865 static bool any_fixup_tree(struct dt_info *dti, struct node *node)
 866 {
 867         struct node *c;
 868         struct property *prop;
 869         struct marker *m;
 870
 871         for_each_property(node, prop) {
 872                 m = prop->val.markers;
 873                 for_each_marker_of_type(m, REF_PHANDLE) {
 874                         if (!get_node_by_ref(dti->dt, m->ref))
 875                                 return true;
 876                 }
 877         }
 878
 879         for_each_child(node, c) {
 880                 if (any_fixup_tree(dti, c))
 881                         return true;
 882         }
 883
 884         return false;
 885 }
 886
 887 static void add_fixup_entry(struct dt_info *dti, struct node *fn,
 888                             struct node *node, struct property *prop,
 889                             struct marker *m)
 890 {
 891         char *entry;
 892
 893         /* m->ref can only be a REF_PHANDLE, but check anyway */
 894         assert(m->type == REF_PHANDLE);
 895
 896         /* there shouldn't be any ':' in the arguments */
 897         if (strchr(node->fullpath, ':') || strchr(prop->name, ':'))
 898                 die("arguments should not contain ':'\n");
 899
 900         xasprintf(&entry, "%s:%s:%u",
 901                         node->fullpath, prop->name, m->offset);
 902         append_to_property(fn, m->ref, entry, strlen(entry) + 1);
 903
 904         free(entry);
 905 }
 906
 907 static void generate_fixups_tree_internal(struct dt_info *dti,
 908                                           struct node *fn,
 909                                           struct node *node)
 910 {
 911         struct node *dt = dti->dt;
 912         struct node *c;
 913         struct property *prop;
 914         struct marker *m;
 915         struct node *refnode;
 916
 917         for_each_property(node, prop) {
 918                 m = prop->val.markers;
 919                 for_each_marker_of_type(m, REF_PHANDLE) {
 920                         refnode = get_node_by_ref(dt, m->ref);
 921                         if (!refnode)
 922                                 add_fixup_entry(dti, fn, node, prop, m);
 923                 }
 924         }
 925
 926         for_each_child(node, c)
 927                 generate_fixups_tree_internal(dti, fn, c);
 928 }
 929
 930 static bool any_local_fixup_tree(struct dt_info *dti, struct node *node)
 931 {
 932         struct node *c;
 933         struct property *prop;
 934         struct marker *m;
 935
 936         for_each_property(node, prop) {
 937                 m = prop->val.markers;
 938                 for_each_marker_of_type(m, REF_PHANDLE) {
 939                         if (get_node_by_ref(dti->dt, m->ref))
 940                                 return true;
 941                 }
 942         }
 943
 944         for_each_child(node, c) {
 945                 if (any_local_fixup_tree(dti, c))
 946                         return true;
 947         }
 948
 949         return false;
 950 }
 951
 952 static void add_local_fixup_entry(struct dt_info *dti,
 953                 struct node *lfn, struct node *node,
 954                 struct property *prop, struct marker *m,
 955                 struct node *refnode)
 956 {
 957         struct node *wn, *nwn;  /* local fixup node, walk node, new */
 958         fdt32_t value_32;
 959         char **compp;
 960         int i, depth;
 961
 962         /* walk back retreiving depth */
 963         depth = 0;
 964         for (wn = node; wn; wn = wn->parent)
 965                 depth++;
 966
 967         /* allocate name array */
 968         compp = xmalloc(sizeof(*compp) * depth);
 969
 970         /* store names in the array */
 971         for (wn = node, i = depth - 1; wn; wn = wn->parent, i--)
 972                 compp[i] = wn->name;
 973
 974         /* walk the path components creating nodes if they don't exist */
 975         for (wn = lfn, i = 1; i < depth; i++, wn = nwn) {
 976                 /* if no node exists, create it */
 977                 nwn = get_subnode(wn, compp[i]);
 978                 if (!nwn)
 979                         nwn = build_and_name_child_node(wn, compp[i]);
 980         }
 981
 982         free(compp);
 983
 984         value_32 = cpu_to_fdt32(m->offset);
 985         append_to_property(wn, prop->name, &value_32, sizeof(value_32));
 986 }
 987
 988 static void generate_local_fixups_tree_internal(struct dt_info *dti,
 989                                                 struct node *lfn,
 990                                                 struct node *node)
 991 {
 992         struct node *dt = dti->dt;
 993         struct node *c;
 994         struct property *prop;
 995         struct marker *m;
 996         struct node *refnode;
 997
 998         for_each_property(node, prop) {
 999                 m = prop->val.markers;
1000                 for_each_marker_of_type(m, REF_PHANDLE) {
1001                         refnode = get_node_by_ref(dt, m->ref);
1002                         if (refnode)
1003                                 add_local_fixup_entry(dti, lfn, node, prop, m, refnode);
1004                 }
1005         }
1006
1007         for_each_child(node, c)
1008                 generate_local_fixups_tree_internal(dti, lfn, c);
1009 }
1010
1011 void generate_label_tree(struct dt_info *dti, char *name, bool allocph)
1012 {
1013         if (!any_label_tree(dti, dti->dt))
1014                 return;
1015         generate_label_tree_internal(dti, build_root_node(dti->dt, name),
1016                                      dti->dt, allocph);
1017 }
1018
1019 void generate_fixups_tree(struct dt_info *dti, char *name)
1020 {
1021         if (!any_fixup_tree(dti, dti->dt))
1022                 return;
1023         generate_fixups_tree_internal(dti, build_root_node(dti->dt, name),
1024                                       dti->dt);
1025 }
1026
1027 void generate_local_fixups_tree(struct dt_info *dti, char *name)
1028 {
1029         if (!any_local_fixup_tree(dti, dti->dt))
1030                 return;
1031         generate_local_fixups_tree_internal(dti, build_root_node(dti->dt, name),
1032                                             dti->dt);
1033 }