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Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mv-sheeva.git] / 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 struct property *build_property(char *name, struct data val, char *label)
28 {
29         struct property *new = xmalloc(sizeof(*new));
30
31         new->name = name;
32         new->val = val;
33
34         new->next = NULL;
35
36         new->label = label;
37
38         return new;
39 }
40
41 struct property *chain_property(struct property *first, struct property *list)
42 {
43         assert(first->next == NULL);
44
45         first->next = list;
46         return first;
47 }
48
49 struct property *reverse_properties(struct property *first)
50 {
51         struct property *p = first;
52         struct property *head = NULL;
53         struct property *next;
54
55         while (p) {
56                 next = p->next;
57                 p->next = head;
58                 head = p;
59                 p = next;
60         }
61         return head;
62 }
63
64 struct node *build_node(struct property *proplist, struct node *children)
65 {
66         struct node *new = xmalloc(sizeof(*new));
67         struct node *child;
68
69         memset(new, 0, sizeof(*new));
70
71         new->proplist = reverse_properties(proplist);
72         new->children = children;
73
74         for_each_child(new, child) {
75                 child->parent = new;
76         }
77
78         return new;
79 }
80
81 struct node *name_node(struct node *node, char *name, char * label)
82 {
83         assert(node->name == NULL);
84
85         node->name = name;
86
87         node->label = label;
88
89         return node;
90 }
91
92 struct node *chain_node(struct node *first, struct node *list)
93 {
94         assert(first->next_sibling == NULL);
95
96         first->next_sibling = list;
97         return first;
98 }
99
100 void add_property(struct node *node, struct property *prop)
101 {
102         struct property **p;
103
104         prop->next = NULL;
105
106         p = &node->proplist;
107         while (*p)
108                 p = &((*p)->next);
109
110         *p = prop;
111 }
112
113 void add_child(struct node *parent, struct node *child)
114 {
115         struct node **p;
116
117         child->next_sibling = NULL;
118         child->parent = parent;
119
120         p = &parent->children;
121         while (*p)
122                 p = &((*p)->next_sibling);
123
124         *p = child;
125 }
126
127 struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size,
128                                          char *label)
129 {
130         struct reserve_info *new = xmalloc(sizeof(*new));
131
132         new->re.address = address;
133         new->re.size = size;
134
135         new->next = NULL;
136
137         new->label = label;
138
139         return new;
140 }
141
142 struct reserve_info *chain_reserve_entry(struct reserve_info *first,
143                                         struct reserve_info *list)
144 {
145         assert(first->next == NULL);
146
147         first->next = list;
148         return first;
149 }
150
151 struct reserve_info *add_reserve_entry(struct reserve_info *list,
152                                       struct reserve_info *new)
153 {
154         struct reserve_info *last;
155
156         new->next = NULL;
157
158         if (! list)
159                 return new;
160
161         for (last = list; last->next; last = last->next)
162                 ;
163
164         last->next = new;
165
166         return list;
167 }
168
169 struct boot_info *build_boot_info(struct reserve_info *reservelist,
170                                   struct node *tree, uint32_t boot_cpuid_phys)
171 {
172         struct boot_info *bi;
173
174         bi = xmalloc(sizeof(*bi));
175         bi->reservelist = reservelist;
176         bi->dt = tree;
177         bi->boot_cpuid_phys = boot_cpuid_phys;
178
179         return bi;
180 }
181
182 /*
183  * Tree accessor functions
184  */
185
186 const char *get_unitname(struct node *node)
187 {
188         if (node->name[node->basenamelen] == '\0')
189                 return "";
190         else
191                 return node->name + node->basenamelen + 1;
192 }
193
194 struct property *get_property(struct node *node, const char *propname)
195 {
196         struct property *prop;
197
198         for_each_property(node, prop)
199                 if (streq(prop->name, propname))
200                         return prop;
201
202         return NULL;
203 }
204
205 cell_t propval_cell(struct property *prop)
206 {
207         assert(prop->val.len == sizeof(cell_t));
208         return fdt32_to_cpu(*((cell_t *)prop->val.val));
209 }
210
211 struct node *get_subnode(struct node *node, const char *nodename)
212 {
213         struct node *child;
214
215         for_each_child(node, child)
216                 if (streq(child->name, nodename))
217                         return child;
218
219         return NULL;
220 }
221
222 struct node *get_node_by_path(struct node *tree, const char *path)
223 {
224         const char *p;
225         struct node *child;
226
227         if (!path || ! (*path))
228                 return tree;
229
230         while (path[0] == '/')
231                 path++;
232
233         p = strchr(path, '/');
234
235         for_each_child(tree, child) {
236                 if (p && strneq(path, child->name, p-path))
237                         return get_node_by_path(child, p+1);
238                 else if (!p && streq(path, child->name))
239                         return child;
240         }
241
242         return NULL;
243 }
244
245 struct node *get_node_by_label(struct node *tree, const char *label)
246 {
247         struct node *child, *node;
248
249         assert(label && (strlen(label) > 0));
250
251         if (tree->label && streq(tree->label, label))
252                 return tree;
253
254         for_each_child(tree, child) {
255                 node = get_node_by_label(child, label);
256                 if (node)
257                         return node;
258         }
259
260         return NULL;
261 }
262
263 struct node *get_node_by_phandle(struct node *tree, cell_t phandle)
264 {
265         struct node *child, *node;
266
267         assert((phandle != 0) && (phandle != -1));
268
269         if (tree->phandle == phandle)
270                 return tree;
271
272         for_each_child(tree, child) {
273                 node = get_node_by_phandle(child, phandle);
274                 if (node)
275                         return node;
276         }
277
278         return NULL;
279 }
280
281 struct node *get_node_by_ref(struct node *tree, const char *ref)
282 {
283         if (ref[0] == '/')
284                 return get_node_by_path(tree, ref);
285         else
286                 return get_node_by_label(tree, ref);
287 }
288
289 cell_t get_node_phandle(struct node *root, struct node *node)
290 {
291         static cell_t phandle = 1; /* FIXME: ick, static local */
292
293         if ((node->phandle != 0) && (node->phandle != -1))
294                 return node->phandle;
295
296         assert(! get_property(node, "linux,phandle"));
297
298         while (get_node_by_phandle(root, phandle))
299                 phandle++;
300
301         node->phandle = phandle;
302         add_property(node,
303                      build_property("linux,phandle",
304                                     data_append_cell(empty_data, phandle),
305                                     NULL));
306
307         return node->phandle;
308 }