x86, efi: Set runtime_version to the EFI spec revision
[linux/fpc-iii.git] / arch / sparc / prom / tree_64.c
blob92204c3800b57afe3366ffa49121001323c06243
1 /*
2 * tree.c: Basic device tree traversal/scanning for the Linux
3 * prom library.
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 */
9 #include <linux/string.h>
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/sched.h>
13 #include <linux/module.h>
15 #include <asm/openprom.h>
16 #include <asm/oplib.h>
17 #include <asm/ldc.h>
19 static phandle prom_node_to_node(const char *type, phandle node)
21 unsigned long args[5];
23 args[0] = (unsigned long) type;
24 args[1] = 1;
25 args[2] = 1;
26 args[3] = (unsigned int) node;
27 args[4] = (unsigned long) -1;
29 p1275_cmd_direct(args);
31 return (phandle) args[4];
34 /* Return the child of node 'node' or zero if no this node has no
35 * direct descendent.
37 inline phandle __prom_getchild(phandle node)
39 return prom_node_to_node("child", node);
42 inline phandle prom_getchild(phandle node)
44 phandle cnode;
46 if ((s32)node == -1)
47 return 0;
48 cnode = __prom_getchild(node);
49 if ((s32)cnode == -1)
50 return 0;
51 return cnode;
53 EXPORT_SYMBOL(prom_getchild);
55 inline phandle prom_getparent(phandle node)
57 phandle cnode;
59 if ((s32)node == -1)
60 return 0;
61 cnode = prom_node_to_node("parent", node);
62 if ((s32)cnode == -1)
63 return 0;
64 return cnode;
67 /* Return the next sibling of node 'node' or zero if no more siblings
68 * at this level of depth in the tree.
70 inline phandle __prom_getsibling(phandle node)
72 return prom_node_to_node(prom_peer_name, node);
75 inline phandle prom_getsibling(phandle node)
77 phandle sibnode;
79 if ((s32)node == -1)
80 return 0;
81 sibnode = __prom_getsibling(node);
82 if ((s32)sibnode == -1)
83 return 0;
85 return sibnode;
87 EXPORT_SYMBOL(prom_getsibling);
89 /* Return the length in bytes of property 'prop' at node 'node'.
90 * Return -1 on error.
92 inline int prom_getproplen(phandle node, const char *prop)
94 unsigned long args[6];
96 if (!node || !prop)
97 return -1;
99 args[0] = (unsigned long) "getproplen";
100 args[1] = 2;
101 args[2] = 1;
102 args[3] = (unsigned int) node;
103 args[4] = (unsigned long) prop;
104 args[5] = (unsigned long) -1;
106 p1275_cmd_direct(args);
108 return (int) args[5];
110 EXPORT_SYMBOL(prom_getproplen);
112 /* Acquire a property 'prop' at node 'node' and place it in
113 * 'buffer' which has a size of 'bufsize'. If the acquisition
114 * was successful the length will be returned, else -1 is returned.
116 inline int prom_getproperty(phandle node, const char *prop,
117 char *buffer, int bufsize)
119 unsigned long args[8];
120 int plen;
122 plen = prom_getproplen(node, prop);
123 if ((plen > bufsize) || (plen == 0) || (plen == -1))
124 return -1;
126 args[0] = (unsigned long) prom_getprop_name;
127 args[1] = 4;
128 args[2] = 1;
129 args[3] = (unsigned int) node;
130 args[4] = (unsigned long) prop;
131 args[5] = (unsigned long) buffer;
132 args[6] = bufsize;
133 args[7] = (unsigned long) -1;
135 p1275_cmd_direct(args);
137 return (int) args[7];
139 EXPORT_SYMBOL(prom_getproperty);
141 /* Acquire an integer property and return its value. Returns -1
142 * on failure.
144 inline int prom_getint(phandle node, const char *prop)
146 int intprop;
148 if (prom_getproperty(node, prop, (char *) &intprop, sizeof(int)) != -1)
149 return intprop;
151 return -1;
153 EXPORT_SYMBOL(prom_getint);
155 /* Acquire an integer property, upon error return the passed default
156 * integer.
159 int prom_getintdefault(phandle node, const char *property, int deflt)
161 int retval;
163 retval = prom_getint(node, property);
164 if (retval == -1)
165 return deflt;
167 return retval;
169 EXPORT_SYMBOL(prom_getintdefault);
171 /* Acquire a boolean property, 1=TRUE 0=FALSE. */
172 int prom_getbool(phandle node, const char *prop)
174 int retval;
176 retval = prom_getproplen(node, prop);
177 if (retval == -1)
178 return 0;
179 return 1;
181 EXPORT_SYMBOL(prom_getbool);
183 /* Acquire a property whose value is a string, returns a null
184 * string on error. The char pointer is the user supplied string
185 * buffer.
187 void prom_getstring(phandle node, const char *prop, char *user_buf,
188 int ubuf_size)
190 int len;
192 len = prom_getproperty(node, prop, user_buf, ubuf_size);
193 if (len != -1)
194 return;
195 user_buf[0] = 0;
197 EXPORT_SYMBOL(prom_getstring);
199 /* Does the device at node 'node' have name 'name'?
200 * YES = 1 NO = 0
202 int prom_nodematch(phandle node, const char *name)
204 char namebuf[128];
205 prom_getproperty(node, "name", namebuf, sizeof(namebuf));
206 if (strcmp(namebuf, name) == 0)
207 return 1;
208 return 0;
211 /* Search siblings at 'node_start' for a node with name
212 * 'nodename'. Return node if successful, zero if not.
214 phandle prom_searchsiblings(phandle node_start, const char *nodename)
216 phandle thisnode;
217 int error;
218 char promlib_buf[128];
220 for(thisnode = node_start; thisnode;
221 thisnode=prom_getsibling(thisnode)) {
222 error = prom_getproperty(thisnode, "name", promlib_buf,
223 sizeof(promlib_buf));
224 /* Should this ever happen? */
225 if(error == -1) continue;
226 if(strcmp(nodename, promlib_buf)==0) return thisnode;
229 return 0;
231 EXPORT_SYMBOL(prom_searchsiblings);
233 static const char *prom_nextprop_name = "nextprop";
235 /* Return the first property type for node 'node'.
236 * buffer should be at least 32B in length
238 inline char *prom_firstprop(phandle node, char *buffer)
240 unsigned long args[7];
242 *buffer = 0;
243 if ((s32)node == -1)
244 return buffer;
246 args[0] = (unsigned long) prom_nextprop_name;
247 args[1] = 3;
248 args[2] = 1;
249 args[3] = (unsigned int) node;
250 args[4] = 0;
251 args[5] = (unsigned long) buffer;
252 args[6] = (unsigned long) -1;
254 p1275_cmd_direct(args);
256 return buffer;
258 EXPORT_SYMBOL(prom_firstprop);
260 /* Return the property type string after property type 'oprop'
261 * at node 'node' . Returns NULL string if no more
262 * property types for this node.
264 inline char *prom_nextprop(phandle node, const char *oprop, char *buffer)
266 unsigned long args[7];
267 char buf[32];
269 if ((s32)node == -1) {
270 *buffer = 0;
271 return buffer;
273 if (oprop == buffer) {
274 strcpy (buf, oprop);
275 oprop = buf;
278 args[0] = (unsigned long) prom_nextprop_name;
279 args[1] = 3;
280 args[2] = 1;
281 args[3] = (unsigned int) node;
282 args[4] = (unsigned long) oprop;
283 args[5] = (unsigned long) buffer;
284 args[6] = (unsigned long) -1;
286 p1275_cmd_direct(args);
288 return buffer;
290 EXPORT_SYMBOL(prom_nextprop);
292 phandle prom_finddevice(const char *name)
294 unsigned long args[5];
296 if (!name)
297 return 0;
298 args[0] = (unsigned long) "finddevice";
299 args[1] = 1;
300 args[2] = 1;
301 args[3] = (unsigned long) name;
302 args[4] = (unsigned long) -1;
304 p1275_cmd_direct(args);
306 return (int) args[4];
308 EXPORT_SYMBOL(prom_finddevice);
310 int prom_node_has_property(phandle node, const char *prop)
312 char buf [32];
314 *buf = 0;
315 do {
316 prom_nextprop(node, buf, buf);
317 if (!strcmp(buf, prop))
318 return 1;
319 } while (*buf);
320 return 0;
322 EXPORT_SYMBOL(prom_node_has_property);
324 /* Set property 'pname' at node 'node' to value 'value' which has a length
325 * of 'size' bytes. Return the number of bytes the prom accepted.
328 prom_setprop(phandle node, const char *pname, char *value, int size)
330 unsigned long args[8];
332 if (size == 0)
333 return 0;
334 if ((pname == 0) || (value == 0))
335 return 0;
337 #ifdef CONFIG_SUN_LDOMS
338 if (ldom_domaining_enabled) {
339 ldom_set_var(pname, value);
340 return 0;
342 #endif
343 args[0] = (unsigned long) "setprop";
344 args[1] = 4;
345 args[2] = 1;
346 args[3] = (unsigned int) node;
347 args[4] = (unsigned long) pname;
348 args[5] = (unsigned long) value;
349 args[6] = size;
350 args[7] = (unsigned long) -1;
352 p1275_cmd_direct(args);
354 return (int) args[7];
356 EXPORT_SYMBOL(prom_setprop);
358 inline phandle prom_inst2pkg(int inst)
360 unsigned long args[5];
361 phandle node;
363 args[0] = (unsigned long) "instance-to-package";
364 args[1] = 1;
365 args[2] = 1;
366 args[3] = (unsigned int) inst;
367 args[4] = (unsigned long) -1;
369 p1275_cmd_direct(args);
371 node = (int) args[4];
372 if ((s32)node == -1)
373 return 0;
374 return node;
377 int prom_ihandle2path(int handle, char *buffer, int bufsize)
379 unsigned long args[7];
381 args[0] = (unsigned long) "instance-to-path";
382 args[1] = 3;
383 args[2] = 1;
384 args[3] = (unsigned int) handle;
385 args[4] = (unsigned long) buffer;
386 args[5] = bufsize;
387 args[6] = (unsigned long) -1;
389 p1275_cmd_direct(args);
391 return (int) args[6];