2 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
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.
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.
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
24 * Tree building functions
27 void add_label(struct label **labels, char *label)
31 /* Make sure the label isn't already there */
32 for_each_label(*labels, new)
33 if (streq(new->label, label))
36 new = xmalloc(sizeof(*new));
42 struct property *build_property(char *name, struct data val)
44 struct property *new = xmalloc(sizeof(*new));
46 memset(new, 0, sizeof(*new));
54 struct property *chain_property(struct property *first, struct property *list)
56 assert(first->next == NULL);
62 struct property *reverse_properties(struct property *first)
64 struct property *p = first;
65 struct property *head = NULL;
66 struct property *next;
77 struct node *build_node(struct property *proplist, struct node *children)
79 struct node *new = xmalloc(sizeof(*new));
82 memset(new, 0, sizeof(*new));
84 new->proplist = reverse_properties(proplist);
85 new->children = children;
87 for_each_child(new, child) {
94 struct node *name_node(struct node *node, char *name)
96 assert(node->name == NULL);
103 struct node *merge_nodes(struct node *old_node, struct node *new_node)
105 struct property *new_prop, *old_prop;
106 struct node *new_child, *old_child;
109 /* Add new node labels to old node */
110 for_each_label(new_node->labels, l)
111 add_label(&old_node->labels, l->label);
113 /* Move properties from the new node to the old node. If there
114 * is a collision, replace the old value with the new */
115 while (new_node->proplist) {
116 /* Pop the property off the list */
117 new_prop = new_node->proplist;
118 new_node->proplist = new_prop->next;
119 new_prop->next = NULL;
121 /* Look for a collision, set new value if there is */
122 for_each_property(old_node, old_prop) {
123 if (streq(old_prop->name, new_prop->name)) {
124 /* Add new labels to old property */
125 for_each_label(new_prop->labels, l)
126 add_label(&old_prop->labels, l->label);
128 old_prop->val = new_prop->val;
135 /* if no collision occurred, add property to the old node. */
137 add_property(old_node, new_prop);
140 /* Move the override child nodes into the primary node. If
141 * there is a collision, then merge the nodes. */
142 while (new_node->children) {
143 /* Pop the child node off the list */
144 new_child = new_node->children;
145 new_node->children = new_child->next_sibling;
146 new_child->parent = NULL;
147 new_child->next_sibling = NULL;
149 /* Search for a collision. Merge if there is */
150 for_each_child(old_node, old_child) {
151 if (streq(old_child->name, new_child->name)) {
152 merge_nodes(old_child, new_child);
158 /* if no collision occurred, add child to the old node. */
160 add_child(old_node, new_child);
163 /* The new node contents are now merged into the old node. Free
170 struct node *chain_node(struct node *first, struct node *list)
172 assert(first->next_sibling == NULL);
174 first->next_sibling = list;
178 void add_property(struct node *node, struct property *prop)
191 void add_child(struct node *parent, struct node *child)
195 child->next_sibling = NULL;
196 child->parent = parent;
198 p = &parent->children;
200 p = &((*p)->next_sibling);
205 struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size)
207 struct reserve_info *new = xmalloc(sizeof(*new));
209 memset(new, 0, sizeof(*new));
211 new->re.address = address;
217 struct reserve_info *chain_reserve_entry(struct reserve_info *first,
218 struct reserve_info *list)
220 assert(first->next == NULL);
226 struct reserve_info *add_reserve_entry(struct reserve_info *list,
227 struct reserve_info *new)
229 struct reserve_info *last;
236 for (last = list; last->next; last = last->next)
244 struct boot_info *build_boot_info(struct reserve_info *reservelist,
245 struct node *tree, uint32_t boot_cpuid_phys)
247 struct boot_info *bi;
249 bi = xmalloc(sizeof(*bi));
250 bi->reservelist = reservelist;
252 bi->boot_cpuid_phys = boot_cpuid_phys;
258 * Tree accessor functions
261 const char *get_unitname(struct node *node)
263 if (node->name[node->basenamelen] == '\0')
266 return node->name + node->basenamelen + 1;
269 struct property *get_property(struct node *node, const char *propname)
271 struct property *prop;
273 for_each_property(node, prop)
274 if (streq(prop->name, propname))
280 cell_t propval_cell(struct property *prop)
282 assert(prop->val.len == sizeof(cell_t));
283 return fdt32_to_cpu(*((cell_t *)prop->val.val));
286 struct property *get_property_by_label(struct node *tree, const char *label,
289 struct property *prop;
294 for_each_property(tree, prop) {
297 for_each_label(prop->labels, l)
298 if (streq(l->label, label))
302 for_each_child(tree, c) {
303 prop = get_property_by_label(c, label, node);
312 struct marker *get_marker_label(struct node *tree, const char *label,
313 struct node **node, struct property **prop)
321 for_each_property(tree, p) {
324 for_each_marker_of_type(m, LABEL)
325 if (streq(m->ref, label))
329 for_each_child(tree, c) {
330 m = get_marker_label(c, label, node, prop);
340 struct node *get_subnode(struct node *node, const char *nodename)
344 for_each_child(node, child)
345 if (streq(child->name, nodename))
351 struct node *get_node_by_path(struct node *tree, const char *path)
356 if (!path || ! (*path))
359 while (path[0] == '/')
362 p = strchr(path, '/');
364 for_each_child(tree, child) {
365 if (p && strneq(path, child->name, p-path))
366 return get_node_by_path(child, p+1);
367 else if (!p && streq(path, child->name))
374 struct node *get_node_by_label(struct node *tree, const char *label)
376 struct node *child, *node;
379 assert(label && (strlen(label) > 0));
381 for_each_label(tree->labels, l)
382 if (streq(l->label, label))
385 for_each_child(tree, child) {
386 node = get_node_by_label(child, label);
394 struct node *get_node_by_phandle(struct node *tree, cell_t phandle)
396 struct node *child, *node;
398 assert((phandle != 0) && (phandle != -1));
400 if (tree->phandle == phandle)
403 for_each_child(tree, child) {
404 node = get_node_by_phandle(child, phandle);
412 struct node *get_node_by_ref(struct node *tree, const char *ref)
415 return get_node_by_path(tree, ref);
417 return get_node_by_label(tree, ref);
420 cell_t get_node_phandle(struct node *root, struct node *node)
422 static cell_t phandle = 1; /* FIXME: ick, static local */
424 if ((node->phandle != 0) && (node->phandle != -1))
425 return node->phandle;
427 while (get_node_by_phandle(root, phandle))
430 node->phandle = phandle;
432 if (!get_property(node, "linux,phandle")
433 && (phandle_format & PHANDLE_LEGACY))
435 build_property("linux,phandle",
436 data_append_cell(empty_data, phandle)));
438 if (!get_property(node, "phandle")
439 && (phandle_format & PHANDLE_EPAPR))
441 build_property("phandle",
442 data_append_cell(empty_data, phandle)));
444 /* If the node *does* have a phandle property, we must
445 * be dealing with a self-referencing phandle, which will be
446 * fixed up momentarily in the caller */
448 return node->phandle;
451 uint32_t guess_boot_cpuid(struct node *tree)
453 struct node *cpus, *bootcpu;
454 struct property *reg;
456 cpus = get_node_by_path(tree, "/cpus");
461 bootcpu = cpus->children;
465 reg = get_property(bootcpu, "reg");
466 if (!reg || (reg->val.len != sizeof(uint32_t)))
469 /* FIXME: Sanity check node? */
471 return propval_cell(reg);
474 static int cmp_reserve_info(const void *ax, const void *bx)
476 const struct reserve_info *a, *b;
478 a = *((const struct reserve_info * const *)ax);
479 b = *((const struct reserve_info * const *)bx);
481 if (a->re.address < b->re.address)
483 else if (a->re.address > b->re.address)
485 else if (a->re.size < b->re.size)
487 else if (a->re.size > b->re.size)
493 static void sort_reserve_entries(struct boot_info *bi)
495 struct reserve_info *ri, **tbl;
498 for (ri = bi->reservelist;
506 tbl = xmalloc(n * sizeof(*tbl));
508 for (ri = bi->reservelist;
513 qsort(tbl, n, sizeof(*tbl), cmp_reserve_info);
515 bi->reservelist = tbl[0];
516 for (i = 0; i < (n-1); i++)
517 tbl[i]->next = tbl[i+1];
518 tbl[n-1]->next = NULL;
523 static int cmp_prop(const void *ax, const void *bx)
525 const struct property *a, *b;
527 a = *((const struct property * const *)ax);
528 b = *((const struct property * const *)bx);
530 return strcmp(a->name, b->name);
533 static void sort_properties(struct node *node)
536 struct property *prop, **tbl;
538 for_each_property(node, prop)
544 tbl = xmalloc(n * sizeof(*tbl));
546 for_each_property(node, prop)
549 qsort(tbl, n, sizeof(*tbl), cmp_prop);
551 node->proplist = tbl[0];
552 for (i = 0; i < (n-1); i++)
553 tbl[i]->next = tbl[i+1];
554 tbl[n-1]->next = NULL;
559 static int cmp_subnode(const void *ax, const void *bx)
561 const struct node *a, *b;
563 a = *((const struct node * const *)ax);
564 b = *((const struct node * const *)bx);
566 return strcmp(a->name, b->name);
569 static void sort_subnodes(struct node *node)
572 struct node *subnode, **tbl;
574 for_each_child(node, subnode)
580 tbl = xmalloc(n * sizeof(*tbl));
582 for_each_child(node, subnode)
585 qsort(tbl, n, sizeof(*tbl), cmp_subnode);
587 node->children = tbl[0];
588 for (i = 0; i < (n-1); i++)
589 tbl[i]->next_sibling = tbl[i+1];
590 tbl[n-1]->next_sibling = NULL;
595 static void sort_node(struct node *node)
599 sort_properties(node);
601 for_each_child(node, c)
605 void sort_tree(struct boot_info *bi)
607 sort_reserve_entries(bi);