| 0,0 → 1,166 |
|---|
| /* |
| * Copyright (C) 2006 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <ofw_tree.h> |
| #include <ofw.h> |
| #include <types.h> |
| #include <string.h> |
| |
| static ofw_tree_node_t *ofw_tree_node_alloc(void) |
| { |
| return NULL; |
| } |
| |
| static ofw_tree_property_t *ofw_tree_properties_alloc(unsigned count) |
| { |
| return NULL; |
| } |
| |
| static void * ofw_tree_space_alloc(size_t size) |
| { |
| return NULL; |
| } |
| |
| /** Transfer information from one OpenFirmware node into its memory representation. |
| * |
| * Transfer entire information from the OpenFirmware device tree 'current' node to |
| * its memory representation in 'current_node'. This function recursively processes |
| * all node's peers and children. |
| * |
| * @param current_node Pointer to uninitialized ofw_tree_node structure that will |
| * become the memory represenation of 'current'. |
| * @param parent_node Parent ofw_tree_node structure or NULL in case of root node. |
| * @param current OpenFirmware phandle to the current device tree node. |
| */ |
| static void ofw_tree_node_process(ofw_tree_node_t *current_node, |
| ofw_tree_node_t *parent_node, phandle current) |
| { |
| phandle peer; |
| phandle child; |
| unsigned properties = 0; |
| char name[OFW_TREE_PROPERTY_MAX_NAMELEN]; |
| |
| /* |
| * Initialize node. |
| */ |
| current_node->parent = parent_node; |
| current_node->peer = NULL; |
| current_node->child = NULL; |
| current_node->properties = 0; |
| current_node->property = NULL; |
| |
| /* |
| * Recursively process the potential peer node. |
| */ |
| peer = ofw_get_peer_node(current); |
| if (peer != 0 && peer != -1) { |
| ofw_tree_node_t *peer_node; |
| |
| peer_node = ofw_tree_node_alloc(); |
| if (peer_node) { |
| ofw_tree_node_process(peer_node, current_node, peer); |
| current_node->peer = peer_node; |
| } |
| } |
| |
| /* |
| * Recursively process the potential child node. |
| */ |
| child = ofw_get_child_node(current); |
| if (child != 0 && child != -1) { |
| ofw_tree_node_t *child_node; |
| |
| child_node = ofw_tree_node_alloc(); |
| if (child_node) { |
| ofw_tree_node_process(child_node, current_node, child); |
| current_node->child = child_node; |
| } |
| } |
| |
| /* |
| * Count properties. |
| */ |
| name[0] = '\0'; |
| while (ofw_next_property(current, name, name) == 1) |
| current_node->properties++; |
| |
| if (!current_node->properties) |
| return; |
| |
| /* |
| * Copy properties. |
| */ |
| current_node->property = ofw_tree_properties_alloc(current_node->properties); |
| if (!current_node->property) |
| return; |
| |
| int i = 0; |
| |
| name[0] = '\0'; |
| for (i = 0; ofw_next_property(current, name, name) == 1; i++) { |
| size_t size; |
| |
| if (i == current_node->properties) |
| break; |
| |
| strncpy(current_node->property[i].name, name, sizeof(name)); |
| |
| size = ofw_get_proplen(current, name); |
| current_node->property[i].size = size; |
| if (size) { |
| void *buf; |
| |
| buf = ofw_tree_space_alloc(size); |
| if (current_node->property[i].value = buf) { |
| /* |
| * Copy property value to memory node. |
| */ |
| (void) ofw_get_property(current, name, buf, size); |
| } |
| } else { |
| current_node->property[i].value = NULL; |
| } |
| } |
| |
| current_node->properties = i; /* Just in case we ran out of memory. */ |
| } |
| |
| /** Construct memory representation of OpenFirmware device tree. |
| * |
| * @return NULL on failure or pointer to the root node. |
| */ |
| ofw_tree_node_t *ofw_tree_build(void) |
| { |
| ofw_tree_node_t *root; |
| |
| root = ofw_tree_node_alloc(); |
| if (root) |
| ofw_tree_node_process(root, NULL, ofw_root); |
| |
| return root; |
| } |