981 строка
19 KiB
C
981 строка
19 KiB
C
/*
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* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include "dtc.h"
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/*
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* Tree building functions
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*/
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void add_label(struct label **labels, char *label)
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{
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struct label *new;
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/* Make sure the label isn't already there */
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for_each_label_withdel(*labels, new)
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if (streq(new->label, label)) {
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new->deleted = 0;
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return;
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}
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new = xmalloc(sizeof(*new));
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memset(new, 0, sizeof(*new));
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new->label = label;
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new->next = *labels;
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*labels = new;
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}
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void delete_labels(struct label **labels)
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{
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struct label *label;
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for_each_label(*labels, label)
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label->deleted = 1;
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}
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struct property *build_property(char *name, struct data val)
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{
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struct property *new = xmalloc(sizeof(*new));
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memset(new, 0, sizeof(*new));
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new->name = name;
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new->val = val;
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return new;
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}
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struct property *build_property_delete(char *name)
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{
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struct property *new = xmalloc(sizeof(*new));
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memset(new, 0, sizeof(*new));
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new->name = name;
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new->deleted = 1;
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return new;
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}
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struct property *chain_property(struct property *first, struct property *list)
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{
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assert(first->next == NULL);
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first->next = list;
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return first;
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}
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struct property *reverse_properties(struct property *first)
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{
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struct property *p = first;
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struct property *head = NULL;
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struct property *next;
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while (p) {
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next = p->next;
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p->next = head;
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head = p;
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p = next;
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}
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return head;
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}
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struct node *build_node(struct property *proplist, struct node *children)
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{
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struct node *new = xmalloc(sizeof(*new));
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struct node *child;
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memset(new, 0, sizeof(*new));
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new->proplist = reverse_properties(proplist);
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new->children = children;
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for_each_child(new, child) {
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child->parent = new;
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}
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return new;
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}
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struct node *build_node_delete(void)
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{
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struct node *new = xmalloc(sizeof(*new));
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memset(new, 0, sizeof(*new));
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new->deleted = 1;
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return new;
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}
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struct node *name_node(struct node *node, char *name)
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{
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assert(node->name == NULL);
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node->name = name;
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return node;
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}
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struct node *merge_nodes(struct node *old_node, struct node *new_node)
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{
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struct property *new_prop, *old_prop;
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struct node *new_child, *old_child;
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struct label *l;
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old_node->deleted = 0;
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/* Add new node labels to old node */
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for_each_label_withdel(new_node->labels, l)
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add_label(&old_node->labels, l->label);
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/* Move properties from the new node to the old node. If there
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* is a collision, replace the old value with the new */
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while (new_node->proplist) {
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/* Pop the property off the list */
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new_prop = new_node->proplist;
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new_node->proplist = new_prop->next;
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new_prop->next = NULL;
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if (new_prop->deleted) {
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delete_property_by_name(old_node, new_prop->name);
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free(new_prop);
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continue;
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}
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/* Look for a collision, set new value if there is */
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for_each_property_withdel(old_node, old_prop) {
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if (streq(old_prop->name, new_prop->name)) {
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/* Add new labels to old property */
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for_each_label_withdel(new_prop->labels, l)
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add_label(&old_prop->labels, l->label);
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old_prop->val = new_prop->val;
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old_prop->deleted = 0;
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free(new_prop);
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new_prop = NULL;
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break;
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}
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}
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/* if no collision occurred, add property to the old node. */
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if (new_prop)
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add_property(old_node, new_prop);
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}
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/* Move the override child nodes into the primary node. If
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* there is a collision, then merge the nodes. */
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while (new_node->children) {
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/* Pop the child node off the list */
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new_child = new_node->children;
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new_node->children = new_child->next_sibling;
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new_child->parent = NULL;
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new_child->next_sibling = NULL;
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if (new_child->deleted) {
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delete_node_by_name(old_node, new_child->name);
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free(new_child);
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continue;
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}
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/* Search for a collision. Merge if there is */
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for_each_child_withdel(old_node, old_child) {
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if (streq(old_child->name, new_child->name)) {
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merge_nodes(old_child, new_child);
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new_child = NULL;
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break;
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}
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}
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/* if no collision occurred, add child to the old node. */
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if (new_child)
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add_child(old_node, new_child);
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}
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/* The new node contents are now merged into the old node. Free
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* the new node. */
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free(new_node);
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return old_node;
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}
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struct node *chain_node(struct node *first, struct node *list)
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{
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assert(first->next_sibling == NULL);
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first->next_sibling = list;
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return first;
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}
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void add_property(struct node *node, struct property *prop)
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{
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struct property **p;
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prop->next = NULL;
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p = &node->proplist;
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while (*p)
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p = &((*p)->next);
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*p = prop;
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}
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void delete_property_by_name(struct node *node, char *name)
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{
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struct property *prop = node->proplist;
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while (prop) {
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if (streq(prop->name, name)) {
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delete_property(prop);
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return;
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}
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prop = prop->next;
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}
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}
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void delete_property(struct property *prop)
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{
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prop->deleted = 1;
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delete_labels(&prop->labels);
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}
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void add_child(struct node *parent, struct node *child)
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{
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struct node **p;
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child->next_sibling = NULL;
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child->parent = parent;
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p = &parent->children;
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while (*p)
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p = &((*p)->next_sibling);
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*p = child;
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}
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void delete_node_by_name(struct node *parent, char *name)
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{
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struct node *node = parent->children;
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while (node) {
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if (streq(node->name, name)) {
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delete_node(node);
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return;
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}
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node = node->next_sibling;
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}
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}
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void delete_node(struct node *node)
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{
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struct property *prop;
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struct node *child;
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node->deleted = 1;
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for_each_child(node, child)
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delete_node(child);
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for_each_property(node, prop)
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delete_property(prop);
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delete_labels(&node->labels);
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}
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void append_to_property(struct node *node,
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char *name, const void *data, int len)
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{
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struct data d;
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struct property *p;
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p = get_property(node, name);
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if (p) {
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d = data_append_data(p->val, data, len);
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p->val = d;
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} else {
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d = data_append_data(empty_data, data, len);
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p = build_property(name, d);
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add_property(node, p);
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}
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}
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struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size)
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{
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struct reserve_info *new = xmalloc(sizeof(*new));
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memset(new, 0, sizeof(*new));
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new->address = address;
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new->size = size;
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return new;
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}
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struct reserve_info *chain_reserve_entry(struct reserve_info *first,
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struct reserve_info *list)
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{
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assert(first->next == NULL);
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first->next = list;
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return first;
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}
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struct reserve_info *add_reserve_entry(struct reserve_info *list,
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struct reserve_info *new)
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{
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struct reserve_info *last;
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new->next = NULL;
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if (! list)
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return new;
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for (last = list; last->next; last = last->next)
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;
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last->next = new;
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return list;
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}
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struct dt_info *build_dt_info(unsigned int dtsflags,
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struct reserve_info *reservelist,
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struct node *tree, uint32_t boot_cpuid_phys)
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{
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struct dt_info *dti;
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dti = xmalloc(sizeof(*dti));
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dti->dtsflags = dtsflags;
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dti->reservelist = reservelist;
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dti->dt = tree;
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dti->boot_cpuid_phys = boot_cpuid_phys;
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return dti;
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}
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/*
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* Tree accessor functions
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*/
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const char *get_unitname(struct node *node)
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{
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if (node->name[node->basenamelen] == '\0')
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return "";
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else
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return node->name + node->basenamelen + 1;
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}
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struct property *get_property(struct node *node, const char *propname)
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{
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struct property *prop;
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for_each_property(node, prop)
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if (streq(prop->name, propname))
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return prop;
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return NULL;
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}
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cell_t propval_cell(struct property *prop)
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{
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assert(prop->val.len == sizeof(cell_t));
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return fdt32_to_cpu(*((fdt32_t *)prop->val.val));
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}
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struct property *get_property_by_label(struct node *tree, const char *label,
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struct node **node)
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{
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struct property *prop;
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struct node *c;
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*node = tree;
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for_each_property(tree, prop) {
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struct label *l;
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for_each_label(prop->labels, l)
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if (streq(l->label, label))
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return prop;
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}
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for_each_child(tree, c) {
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prop = get_property_by_label(c, label, node);
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if (prop)
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return prop;
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}
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*node = NULL;
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return NULL;
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}
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struct marker *get_marker_label(struct node *tree, const char *label,
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struct node **node, struct property **prop)
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{
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struct marker *m;
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struct property *p;
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struct node *c;
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*node = tree;
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for_each_property(tree, p) {
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*prop = p;
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m = p->val.markers;
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for_each_marker_of_type(m, LABEL)
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if (streq(m->ref, label))
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return m;
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}
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for_each_child(tree, c) {
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m = get_marker_label(c, label, node, prop);
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if (m)
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return m;
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}
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*prop = NULL;
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*node = NULL;
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return NULL;
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}
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struct node *get_subnode(struct node *node, const char *nodename)
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{
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struct node *child;
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for_each_child(node, child)
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if (streq(child->name, nodename))
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return child;
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return NULL;
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}
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struct node *get_node_by_path(struct node *tree, const char *path)
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{
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const char *p;
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struct node *child;
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if (!path || ! (*path)) {
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if (tree->deleted)
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return NULL;
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return tree;
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}
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while (path[0] == '/')
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path++;
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p = strchr(path, '/');
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for_each_child(tree, child) {
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if (p && strneq(path, child->name, p-path))
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return get_node_by_path(child, p+1);
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else if (!p && streq(path, child->name))
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return child;
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}
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return NULL;
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}
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struct node *get_node_by_label(struct node *tree, const char *label)
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{
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struct node *child, *node;
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struct label *l;
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assert(label && (strlen(label) > 0));
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for_each_label(tree->labels, l)
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if (streq(l->label, label))
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return tree;
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for_each_child(tree, child) {
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node = get_node_by_label(child, label);
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if (node)
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return node;
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}
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return NULL;
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}
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struct node *get_node_by_phandle(struct node *tree, cell_t phandle)
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{
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struct node *child, *node;
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assert((phandle != 0) && (phandle != -1));
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if (tree->phandle == phandle) {
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if (tree->deleted)
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return NULL;
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return tree;
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}
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for_each_child(tree, child) {
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node = get_node_by_phandle(child, phandle);
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if (node)
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return node;
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}
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return NULL;
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}
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struct node *get_node_by_ref(struct node *tree, const char *ref)
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{
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if (streq(ref, "/"))
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return tree;
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else if (ref[0] == '/')
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return get_node_by_path(tree, ref);
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else
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return get_node_by_label(tree, ref);
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}
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cell_t get_node_phandle(struct node *root, struct node *node)
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{
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static cell_t phandle = 1; /* FIXME: ick, static local */
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if ((node->phandle != 0) && (node->phandle != -1))
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return node->phandle;
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while (get_node_by_phandle(root, phandle))
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phandle++;
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node->phandle = phandle;
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if (!get_property(node, "linux,phandle")
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&& (phandle_format & PHANDLE_LEGACY))
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add_property(node,
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build_property("linux,phandle",
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data_append_cell(empty_data, phandle)));
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if (!get_property(node, "phandle")
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&& (phandle_format & PHANDLE_EPAPR))
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add_property(node,
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build_property("phandle",
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data_append_cell(empty_data, phandle)));
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/* If the node *does* have a phandle property, we must
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* be dealing with a self-referencing phandle, which will be
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* fixed up momentarily in the caller */
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return node->phandle;
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}
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uint32_t guess_boot_cpuid(struct node *tree)
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{
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struct node *cpus, *bootcpu;
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struct property *reg;
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cpus = get_node_by_path(tree, "/cpus");
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if (!cpus)
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return 0;
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bootcpu = cpus->children;
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if (!bootcpu)
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return 0;
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reg = get_property(bootcpu, "reg");
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if (!reg || (reg->val.len != sizeof(uint32_t)))
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return 0;
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/* FIXME: Sanity check node? */
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return propval_cell(reg);
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}
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static int cmp_reserve_info(const void *ax, const void *bx)
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{
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const struct reserve_info *a, *b;
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a = *((const struct reserve_info * const *)ax);
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b = *((const struct reserve_info * const *)bx);
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if (a->address < b->address)
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return -1;
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else if (a->address > b->address)
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return 1;
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else if (a->size < b->size)
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|
return -1;
|
|
else if (a->size > b->size)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static void sort_reserve_entries(struct dt_info *dti)
|
|
{
|
|
struct reserve_info *ri, **tbl;
|
|
int n = 0, i = 0;
|
|
|
|
for (ri = dti->reservelist;
|
|
ri;
|
|
ri = ri->next)
|
|
n++;
|
|
|
|
if (n == 0)
|
|
return;
|
|
|
|
tbl = xmalloc(n * sizeof(*tbl));
|
|
|
|
for (ri = dti->reservelist;
|
|
ri;
|
|
ri = ri->next)
|
|
tbl[i++] = ri;
|
|
|
|
qsort(tbl, n, sizeof(*tbl), cmp_reserve_info);
|
|
|
|
dti->reservelist = tbl[0];
|
|
for (i = 0; i < (n-1); i++)
|
|
tbl[i]->next = tbl[i+1];
|
|
tbl[n-1]->next = NULL;
|
|
|
|
free(tbl);
|
|
}
|
|
|
|
static int cmp_prop(const void *ax, const void *bx)
|
|
{
|
|
const struct property *a, *b;
|
|
|
|
a = *((const struct property * const *)ax);
|
|
b = *((const struct property * const *)bx);
|
|
|
|
return strcmp(a->name, b->name);
|
|
}
|
|
|
|
static void sort_properties(struct node *node)
|
|
{
|
|
int n = 0, i = 0;
|
|
struct property *prop, **tbl;
|
|
|
|
for_each_property_withdel(node, prop)
|
|
n++;
|
|
|
|
if (n == 0)
|
|
return;
|
|
|
|
tbl = xmalloc(n * sizeof(*tbl));
|
|
|
|
for_each_property_withdel(node, prop)
|
|
tbl[i++] = prop;
|
|
|
|
qsort(tbl, n, sizeof(*tbl), cmp_prop);
|
|
|
|
node->proplist = tbl[0];
|
|
for (i = 0; i < (n-1); i++)
|
|
tbl[i]->next = tbl[i+1];
|
|
tbl[n-1]->next = NULL;
|
|
|
|
free(tbl);
|
|
}
|
|
|
|
static int cmp_subnode(const void *ax, const void *bx)
|
|
{
|
|
const struct node *a, *b;
|
|
|
|
a = *((const struct node * const *)ax);
|
|
b = *((const struct node * const *)bx);
|
|
|
|
return strcmp(a->name, b->name);
|
|
}
|
|
|
|
static void sort_subnodes(struct node *node)
|
|
{
|
|
int n = 0, i = 0;
|
|
struct node *subnode, **tbl;
|
|
|
|
for_each_child_withdel(node, subnode)
|
|
n++;
|
|
|
|
if (n == 0)
|
|
return;
|
|
|
|
tbl = xmalloc(n * sizeof(*tbl));
|
|
|
|
for_each_child_withdel(node, subnode)
|
|
tbl[i++] = subnode;
|
|
|
|
qsort(tbl, n, sizeof(*tbl), cmp_subnode);
|
|
|
|
node->children = tbl[0];
|
|
for (i = 0; i < (n-1); i++)
|
|
tbl[i]->next_sibling = tbl[i+1];
|
|
tbl[n-1]->next_sibling = NULL;
|
|
|
|
free(tbl);
|
|
}
|
|
|
|
static void sort_node(struct node *node)
|
|
{
|
|
struct node *c;
|
|
|
|
sort_properties(node);
|
|
sort_subnodes(node);
|
|
for_each_child_withdel(node, c)
|
|
sort_node(c);
|
|
}
|
|
|
|
void sort_tree(struct dt_info *dti)
|
|
{
|
|
sort_reserve_entries(dti);
|
|
sort_node(dti->dt);
|
|
}
|
|
|
|
/* utility helper to avoid code duplication */
|
|
static struct node *build_and_name_child_node(struct node *parent, char *name)
|
|
{
|
|
struct node *node;
|
|
|
|
node = build_node(NULL, NULL);
|
|
name_node(node, xstrdup(name));
|
|
add_child(parent, node);
|
|
|
|
return node;
|
|
}
|
|
|
|
static struct node *build_root_node(struct node *dt, char *name)
|
|
{
|
|
struct node *an;
|
|
|
|
an = get_subnode(dt, name);
|
|
if (!an)
|
|
an = build_and_name_child_node(dt, name);
|
|
|
|
if (!an)
|
|
die("Could not build root node /%s\n", name);
|
|
|
|
return an;
|
|
}
|
|
|
|
static bool any_label_tree(struct dt_info *dti, struct node *node)
|
|
{
|
|
struct node *c;
|
|
|
|
if (node->labels)
|
|
return true;
|
|
|
|
for_each_child(node, c)
|
|
if (any_label_tree(dti, c))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static void generate_label_tree_internal(struct dt_info *dti,
|
|
struct node *an, struct node *node,
|
|
bool allocph)
|
|
{
|
|
struct node *dt = dti->dt;
|
|
struct node *c;
|
|
struct property *p;
|
|
struct label *l;
|
|
|
|
/* if there are labels */
|
|
if (node->labels) {
|
|
|
|
/* now add the label in the node */
|
|
for_each_label(node->labels, l) {
|
|
|
|
/* check whether the label already exists */
|
|
p = get_property(an, l->label);
|
|
if (p) {
|
|
fprintf(stderr, "WARNING: label %s already"
|
|
" exists in /%s", l->label,
|
|
an->name);
|
|
continue;
|
|
}
|
|
|
|
/* insert it */
|
|
p = build_property(l->label,
|
|
data_copy_mem(node->fullpath,
|
|
strlen(node->fullpath) + 1));
|
|
add_property(an, p);
|
|
}
|
|
|
|
/* force allocation of a phandle for this node */
|
|
if (allocph)
|
|
(void)get_node_phandle(dt, node);
|
|
}
|
|
|
|
for_each_child(node, c)
|
|
generate_label_tree_internal(dti, an, c, allocph);
|
|
}
|
|
|
|
static bool any_fixup_tree(struct dt_info *dti, struct node *node)
|
|
{
|
|
struct node *c;
|
|
struct property *prop;
|
|
struct marker *m;
|
|
|
|
for_each_property(node, prop) {
|
|
m = prop->val.markers;
|
|
for_each_marker_of_type(m, REF_PHANDLE) {
|
|
if (!get_node_by_ref(dti->dt, m->ref))
|
|
return true;
|
|
}
|
|
}
|
|
|
|
for_each_child(node, c) {
|
|
if (any_fixup_tree(dti, c))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void add_fixup_entry(struct dt_info *dti, struct node *fn,
|
|
struct node *node, struct property *prop,
|
|
struct marker *m)
|
|
{
|
|
char *entry;
|
|
|
|
/* m->ref can only be a REF_PHANDLE, but check anyway */
|
|
assert(m->type == REF_PHANDLE);
|
|
|
|
/* there shouldn't be any ':' in the arguments */
|
|
if (strchr(node->fullpath, ':') || strchr(prop->name, ':'))
|
|
die("arguments should not contain ':'\n");
|
|
|
|
xasprintf(&entry, "%s:%s:%u",
|
|
node->fullpath, prop->name, m->offset);
|
|
append_to_property(fn, m->ref, entry, strlen(entry) + 1);
|
|
|
|
free(entry);
|
|
}
|
|
|
|
static void generate_fixups_tree_internal(struct dt_info *dti,
|
|
struct node *fn,
|
|
struct node *node)
|
|
{
|
|
struct node *dt = dti->dt;
|
|
struct node *c;
|
|
struct property *prop;
|
|
struct marker *m;
|
|
struct node *refnode;
|
|
|
|
for_each_property(node, prop) {
|
|
m = prop->val.markers;
|
|
for_each_marker_of_type(m, REF_PHANDLE) {
|
|
refnode = get_node_by_ref(dt, m->ref);
|
|
if (!refnode)
|
|
add_fixup_entry(dti, fn, node, prop, m);
|
|
}
|
|
}
|
|
|
|
for_each_child(node, c)
|
|
generate_fixups_tree_internal(dti, fn, c);
|
|
}
|
|
|
|
static bool any_local_fixup_tree(struct dt_info *dti, struct node *node)
|
|
{
|
|
struct node *c;
|
|
struct property *prop;
|
|
struct marker *m;
|
|
|
|
for_each_property(node, prop) {
|
|
m = prop->val.markers;
|
|
for_each_marker_of_type(m, REF_PHANDLE) {
|
|
if (get_node_by_ref(dti->dt, m->ref))
|
|
return true;
|
|
}
|
|
}
|
|
|
|
for_each_child(node, c) {
|
|
if (any_local_fixup_tree(dti, c))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void add_local_fixup_entry(struct dt_info *dti,
|
|
struct node *lfn, struct node *node,
|
|
struct property *prop, struct marker *m,
|
|
struct node *refnode)
|
|
{
|
|
struct node *wn, *nwn; /* local fixup node, walk node, new */
|
|
fdt32_t value_32;
|
|
char **compp;
|
|
int i, depth;
|
|
|
|
/* walk back retreiving depth */
|
|
depth = 0;
|
|
for (wn = node; wn; wn = wn->parent)
|
|
depth++;
|
|
|
|
/* allocate name array */
|
|
compp = xmalloc(sizeof(*compp) * depth);
|
|
|
|
/* store names in the array */
|
|
for (wn = node, i = depth - 1; wn; wn = wn->parent, i--)
|
|
compp[i] = wn->name;
|
|
|
|
/* walk the path components creating nodes if they don't exist */
|
|
for (wn = lfn, i = 1; i < depth; i++, wn = nwn) {
|
|
/* if no node exists, create it */
|
|
nwn = get_subnode(wn, compp[i]);
|
|
if (!nwn)
|
|
nwn = build_and_name_child_node(wn, compp[i]);
|
|
}
|
|
|
|
free(compp);
|
|
|
|
value_32 = cpu_to_fdt32(m->offset);
|
|
append_to_property(wn, prop->name, &value_32, sizeof(value_32));
|
|
}
|
|
|
|
static void generate_local_fixups_tree_internal(struct dt_info *dti,
|
|
struct node *lfn,
|
|
struct node *node)
|
|
{
|
|
struct node *dt = dti->dt;
|
|
struct node *c;
|
|
struct property *prop;
|
|
struct marker *m;
|
|
struct node *refnode;
|
|
|
|
for_each_property(node, prop) {
|
|
m = prop->val.markers;
|
|
for_each_marker_of_type(m, REF_PHANDLE) {
|
|
refnode = get_node_by_ref(dt, m->ref);
|
|
if (refnode)
|
|
add_local_fixup_entry(dti, lfn, node, prop, m, refnode);
|
|
}
|
|
}
|
|
|
|
for_each_child(node, c)
|
|
generate_local_fixups_tree_internal(dti, lfn, c);
|
|
}
|
|
|
|
void generate_label_tree(struct dt_info *dti, char *name, bool allocph)
|
|
{
|
|
if (!any_label_tree(dti, dti->dt))
|
|
return;
|
|
generate_label_tree_internal(dti, build_root_node(dti->dt, name),
|
|
dti->dt, allocph);
|
|
}
|
|
|
|
void generate_fixups_tree(struct dt_info *dti, char *name)
|
|
{
|
|
if (!any_fixup_tree(dti, dti->dt))
|
|
return;
|
|
generate_fixups_tree_internal(dti, build_root_node(dti->dt, name),
|
|
dti->dt);
|
|
}
|
|
|
|
void generate_local_fixups_tree(struct dt_info *dti, char *name)
|
|
{
|
|
if (!any_local_fixup_tree(dti, dti->dt))
|
|
return;
|
|
generate_local_fixups_tree_internal(dti, build_root_node(dti->dt, name),
|
|
dti->dt);
|
|
}
|