| 35,5 → 35,120 |
|---|
| * |
| */ |
| |
| #include <genarch/ofw/ofw_tree.h> |
| #include <arch/memstr.h> |
| #include <func.h> |
| #include <print.h> |
| #include <panic.h> |
| |
| #define PATH_MAX_LEN 80 |
| #define NAME_BUF_LEN 50 |
| |
| static ofw_tree_node_t *ofw_root; |
| |
| void ofw_tree_init(ofw_tree_node_t *root) |
| { |
| ofw_root = root; |
| } |
| |
| /** Return value of the 'name' property. |
| * |
| * @param node Node of interest. |
| * |
| * @return Value of the 'name' property belonging to the node. |
| */ |
| const char *ofw_tree_node_name(const ofw_tree_node_t *node) |
| { |
| int i; |
| |
| for (i = 0; i < node->properties; i++) { |
| if (strncmp(node->property[i].name, "name", strlen("name")) == 0) { |
| if (node->property[i].size < 2) |
| panic("Invalid name property.\n"); |
| return node->property[i].value; |
| } |
| } |
| |
| panic("Node without name property.\n"); |
| } |
| |
| /** Lookup child of given name. |
| * |
| * @param node Node whose child is being looked up. |
| * @param da_name Disambigued name of the child being looked up. |
| * |
| * @return NULL if there is no such child or pointer to the matching child node. |
| */ |
| static ofw_tree_node_t *ofw_tree_find_child(ofw_tree_node_t *node, const char *da_name) |
| { |
| ofw_tree_node_t *cur; |
| |
| for (cur = node->child; cur; cur = cur->peer) { |
| if (strncmp(cur->da_name, da_name, strlen(da_name)) == 0) |
| return cur; |
| } |
| |
| return NULL; |
| } |
| |
| /** Lookup OpenFirmware node by its path. |
| * |
| * @param path Path to the node. |
| * |
| * @return NULL if there is no such node or pointer to the leaf node. |
| */ |
| ofw_tree_node_t *ofw_tree_lookup(const char *path) |
| { |
| char buf[NAME_BUF_LEN+1]; |
| ofw_tree_node_t *node = ofw_root; |
| index_t i, j; |
| |
| if (path[0] != '/') |
| return NULL; |
| |
| for (i = 1; i < strlen(path) && node; i = j + 1) { |
| for (j = i; j < strlen(path) && path[j] != '/'; j++) |
| ; |
| if (i == j) /* skip extra slashes */ |
| continue; |
| |
| memcpy(buf, &path[i], j - i); |
| buf[j - i] = '\0'; |
| node = ofw_tree_find_child(node, buf); |
| } |
| |
| return node; |
| } |
| |
| /** Recursively print subtree rooted in a node. |
| * |
| * @param node Root of the subtree. |
| * @param path Current path, NULL for the very root of the entire tree. |
| */ |
| static void ofw_tree_node_print(const ofw_tree_node_t *node, const char *path) |
| { |
| char p[PATH_MAX_LEN]; |
| |
| if (node->parent) { |
| snprintf(p, PATH_MAX_LEN, "%s/%s", path, node->da_name); |
| printf("%s\n", p); |
| } else { |
| snprintf(p, PATH_MAX_LEN, "%s", node->da_name); |
| printf("/\n"); |
| } |
| |
| if (node->child) |
| ofw_tree_node_print(node->child, p); |
| |
| if (node->peer) |
| ofw_tree_node_print(node->peer, path); |
| } |
| |
| /** Print the structure of the OpenFirmware device tree. */ |
| void ofw_tree_print(void) |
| { |
| ofw_tree_node_print(ofw_root, NULL); |
| } |
| |
| /** @} |
| */ |