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Commit | Line | Data |
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9b6b563c PM |
1 | /* |
2 | * Procedures for creating, accessing and interpreting the device tree. | |
3 | * | |
4 | * Paul Mackerras August 1996. | |
5 | * Copyright (C) 1996-2005 Paul Mackerras. | |
6 | * | |
7 | * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. | |
8 | * {engebret|bergner}@us.ibm.com | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #undef DEBUG | |
17 | ||
18 | #include <stdarg.h> | |
9b6b563c PM |
19 | #include <linux/kernel.h> |
20 | #include <linux/string.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/threads.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/pci.h> | |
26 | #include <linux/stringify.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/initrd.h> | |
29 | #include <linux/bitops.h> | |
30 | #include <linux/module.h> | |
dcee3036 | 31 | #include <linux/kexec.h> |
7a4571ae | 32 | #include <linux/debugfs.h> |
0ebfff14 | 33 | #include <linux/irq.h> |
d9b2b2a2 | 34 | #include <linux/lmb.h> |
9b6b563c PM |
35 | |
36 | #include <asm/prom.h> | |
37 | #include <asm/rtas.h> | |
9b6b563c PM |
38 | #include <asm/page.h> |
39 | #include <asm/processor.h> | |
40 | #include <asm/irq.h> | |
41 | #include <asm/io.h> | |
0cc4746c | 42 | #include <asm/kdump.h> |
9b6b563c PM |
43 | #include <asm/smp.h> |
44 | #include <asm/system.h> | |
45 | #include <asm/mmu.h> | |
46 | #include <asm/pgtable.h> | |
47 | #include <asm/pci.h> | |
48 | #include <asm/iommu.h> | |
49 | #include <asm/btext.h> | |
50 | #include <asm/sections.h> | |
51 | #include <asm/machdep.h> | |
52 | #include <asm/pSeries_reconfig.h> | |
40ef8cbc | 53 | #include <asm/pci-bridge.h> |
6ac26c8a | 54 | #include <asm/phyp_dump.h> |
2babf5c2 | 55 | #include <asm/kexec.h> |
37dd2bad | 56 | #include <mm/mmu_decl.h> |
9b6b563c PM |
57 | |
58 | #ifdef DEBUG | |
59 | #define DBG(fmt...) printk(KERN_ERR fmt) | |
60 | #else | |
61 | #define DBG(fmt...) | |
62 | #endif | |
63 | ||
9b6b563c | 64 | |
9b6b563c PM |
65 | static int __initdata dt_root_addr_cells; |
66 | static int __initdata dt_root_size_cells; | |
67 | ||
68 | #ifdef CONFIG_PPC64 | |
28897731 | 69 | int __initdata iommu_is_off; |
9b6b563c | 70 | int __initdata iommu_force_on; |
cf00a8d1 | 71 | unsigned long tce_alloc_start, tce_alloc_end; |
9b6b563c PM |
72 | #endif |
73 | ||
74 | typedef u32 cell_t; | |
75 | ||
76 | #if 0 | |
77 | static struct boot_param_header *initial_boot_params __initdata; | |
78 | #else | |
79 | struct boot_param_header *initial_boot_params; | |
80 | #endif | |
81 | ||
1ef4d424 | 82 | extern struct device_node *allnodes; /* temporary while merging */ |
9b6b563c | 83 | |
581b605a | 84 | extern rwlock_t devtree_lock; /* temporary while merging */ |
9b6b563c PM |
85 | |
86 | /* export that to outside world */ | |
87 | struct device_node *of_chosen; | |
88 | ||
9b6b563c PM |
89 | static inline char *find_flat_dt_string(u32 offset) |
90 | { | |
91 | return ((char *)initial_boot_params) + | |
92 | initial_boot_params->off_dt_strings + offset; | |
93 | } | |
94 | ||
95 | /** | |
96 | * This function is used to scan the flattened device-tree, it is | |
97 | * used to extract the memory informations at boot before we can | |
98 | * unflatten the tree | |
99 | */ | |
3c726f8d BH |
100 | int __init of_scan_flat_dt(int (*it)(unsigned long node, |
101 | const char *uname, int depth, | |
102 | void *data), | |
103 | void *data) | |
9b6b563c PM |
104 | { |
105 | unsigned long p = ((unsigned long)initial_boot_params) + | |
106 | initial_boot_params->off_dt_struct; | |
107 | int rc = 0; | |
108 | int depth = -1; | |
109 | ||
110 | do { | |
111 | u32 tag = *((u32 *)p); | |
112 | char *pathp; | |
113 | ||
114 | p += 4; | |
115 | if (tag == OF_DT_END_NODE) { | |
116 | depth --; | |
117 | continue; | |
118 | } | |
119 | if (tag == OF_DT_NOP) | |
120 | continue; | |
121 | if (tag == OF_DT_END) | |
122 | break; | |
123 | if (tag == OF_DT_PROP) { | |
124 | u32 sz = *((u32 *)p); | |
125 | p += 8; | |
126 | if (initial_boot_params->version < 0x10) | |
127 | p = _ALIGN(p, sz >= 8 ? 8 : 4); | |
128 | p += sz; | |
129 | p = _ALIGN(p, 4); | |
130 | continue; | |
131 | } | |
132 | if (tag != OF_DT_BEGIN_NODE) { | |
133 | printk(KERN_WARNING "Invalid tag %x scanning flattened" | |
134 | " device tree !\n", tag); | |
135 | return -EINVAL; | |
136 | } | |
137 | depth++; | |
138 | pathp = (char *)p; | |
139 | p = _ALIGN(p + strlen(pathp) + 1, 4); | |
140 | if ((*pathp) == '/') { | |
141 | char *lp, *np; | |
142 | for (lp = NULL, np = pathp; *np; np++) | |
143 | if ((*np) == '/') | |
144 | lp = np+1; | |
145 | if (lp != NULL) | |
146 | pathp = lp; | |
147 | } | |
148 | rc = it(p, pathp, depth, data); | |
149 | if (rc != 0) | |
150 | break; | |
151 | } while(1); | |
152 | ||
153 | return rc; | |
154 | } | |
155 | ||
e8222502 BH |
156 | unsigned long __init of_get_flat_dt_root(void) |
157 | { | |
158 | unsigned long p = ((unsigned long)initial_boot_params) + | |
159 | initial_boot_params->off_dt_struct; | |
160 | ||
161 | while(*((u32 *)p) == OF_DT_NOP) | |
162 | p += 4; | |
163 | BUG_ON (*((u32 *)p) != OF_DT_BEGIN_NODE); | |
164 | p += 4; | |
165 | return _ALIGN(p + strlen((char *)p) + 1, 4); | |
166 | } | |
167 | ||
9b6b563c PM |
168 | /** |
169 | * This function can be used within scan_flattened_dt callback to get | |
170 | * access to properties | |
171 | */ | |
3c726f8d BH |
172 | void* __init of_get_flat_dt_prop(unsigned long node, const char *name, |
173 | unsigned long *size) | |
9b6b563c PM |
174 | { |
175 | unsigned long p = node; | |
176 | ||
177 | do { | |
178 | u32 tag = *((u32 *)p); | |
179 | u32 sz, noff; | |
180 | const char *nstr; | |
181 | ||
182 | p += 4; | |
183 | if (tag == OF_DT_NOP) | |
184 | continue; | |
185 | if (tag != OF_DT_PROP) | |
186 | return NULL; | |
187 | ||
188 | sz = *((u32 *)p); | |
189 | noff = *((u32 *)(p + 4)); | |
190 | p += 8; | |
191 | if (initial_boot_params->version < 0x10) | |
192 | p = _ALIGN(p, sz >= 8 ? 8 : 4); | |
193 | ||
194 | nstr = find_flat_dt_string(noff); | |
195 | if (nstr == NULL) { | |
196 | printk(KERN_WARNING "Can't find property index" | |
197 | " name !\n"); | |
198 | return NULL; | |
199 | } | |
200 | if (strcmp(name, nstr) == 0) { | |
201 | if (size) | |
202 | *size = sz; | |
203 | return (void *)p; | |
204 | } | |
205 | p += sz; | |
206 | p = _ALIGN(p, 4); | |
207 | } while(1); | |
208 | } | |
209 | ||
e8222502 BH |
210 | int __init of_flat_dt_is_compatible(unsigned long node, const char *compat) |
211 | { | |
212 | const char* cp; | |
213 | unsigned long cplen, l; | |
214 | ||
215 | cp = of_get_flat_dt_prop(node, "compatible", &cplen); | |
216 | if (cp == NULL) | |
217 | return 0; | |
218 | while (cplen > 0) { | |
219 | if (strncasecmp(cp, compat, strlen(compat)) == 0) | |
220 | return 1; | |
221 | l = strlen(cp) + 1; | |
222 | cp += l; | |
223 | cplen -= l; | |
224 | } | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
9b6b563c PM |
229 | static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size, |
230 | unsigned long align) | |
231 | { | |
232 | void *res; | |
233 | ||
234 | *mem = _ALIGN(*mem, align); | |
235 | res = (void *)*mem; | |
236 | *mem += size; | |
237 | ||
238 | return res; | |
239 | } | |
240 | ||
241 | static unsigned long __init unflatten_dt_node(unsigned long mem, | |
242 | unsigned long *p, | |
243 | struct device_node *dad, | |
244 | struct device_node ***allnextpp, | |
245 | unsigned long fpsize) | |
246 | { | |
247 | struct device_node *np; | |
248 | struct property *pp, **prev_pp = NULL; | |
249 | char *pathp; | |
250 | u32 tag; | |
251 | unsigned int l, allocl; | |
252 | int has_name = 0; | |
253 | int new_format = 0; | |
254 | ||
255 | tag = *((u32 *)(*p)); | |
256 | if (tag != OF_DT_BEGIN_NODE) { | |
257 | printk("Weird tag at start of node: %x\n", tag); | |
258 | return mem; | |
259 | } | |
260 | *p += 4; | |
261 | pathp = (char *)*p; | |
262 | l = allocl = strlen(pathp) + 1; | |
263 | *p = _ALIGN(*p + l, 4); | |
264 | ||
265 | /* version 0x10 has a more compact unit name here instead of the full | |
266 | * path. we accumulate the full path size using "fpsize", we'll rebuild | |
267 | * it later. We detect this because the first character of the name is | |
268 | * not '/'. | |
269 | */ | |
270 | if ((*pathp) != '/') { | |
271 | new_format = 1; | |
272 | if (fpsize == 0) { | |
273 | /* root node: special case. fpsize accounts for path | |
274 | * plus terminating zero. root node only has '/', so | |
275 | * fpsize should be 2, but we want to avoid the first | |
276 | * level nodes to have two '/' so we use fpsize 1 here | |
277 | */ | |
278 | fpsize = 1; | |
279 | allocl = 2; | |
280 | } else { | |
281 | /* account for '/' and path size minus terminal 0 | |
282 | * already in 'l' | |
283 | */ | |
284 | fpsize += l; | |
285 | allocl = fpsize; | |
286 | } | |
287 | } | |
288 | ||
289 | ||
290 | np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl, | |
291 | __alignof__(struct device_node)); | |
292 | if (allnextpp) { | |
293 | memset(np, 0, sizeof(*np)); | |
294 | np->full_name = ((char*)np) + sizeof(struct device_node); | |
295 | if (new_format) { | |
296 | char *p = np->full_name; | |
297 | /* rebuild full path for new format */ | |
298 | if (dad && dad->parent) { | |
299 | strcpy(p, dad->full_name); | |
300 | #ifdef DEBUG | |
301 | if ((strlen(p) + l + 1) != allocl) { | |
302 | DBG("%s: p: %d, l: %d, a: %d\n", | |
e8222502 | 303 | pathp, (int)strlen(p), l, allocl); |
9b6b563c PM |
304 | } |
305 | #endif | |
306 | p += strlen(p); | |
307 | } | |
308 | *(p++) = '/'; | |
309 | memcpy(p, pathp, l); | |
310 | } else | |
311 | memcpy(np->full_name, pathp, l); | |
312 | prev_pp = &np->properties; | |
313 | **allnextpp = np; | |
314 | *allnextpp = &np->allnext; | |
315 | if (dad != NULL) { | |
316 | np->parent = dad; | |
317 | /* we temporarily use the next field as `last_child'*/ | |
318 | if (dad->next == 0) | |
319 | dad->child = np; | |
320 | else | |
321 | dad->next->sibling = np; | |
322 | dad->next = np; | |
323 | } | |
324 | kref_init(&np->kref); | |
325 | } | |
326 | while(1) { | |
327 | u32 sz, noff; | |
328 | char *pname; | |
329 | ||
330 | tag = *((u32 *)(*p)); | |
331 | if (tag == OF_DT_NOP) { | |
332 | *p += 4; | |
333 | continue; | |
334 | } | |
335 | if (tag != OF_DT_PROP) | |
336 | break; | |
337 | *p += 4; | |
338 | sz = *((u32 *)(*p)); | |
339 | noff = *((u32 *)((*p) + 4)); | |
340 | *p += 8; | |
341 | if (initial_boot_params->version < 0x10) | |
342 | *p = _ALIGN(*p, sz >= 8 ? 8 : 4); | |
343 | ||
344 | pname = find_flat_dt_string(noff); | |
345 | if (pname == NULL) { | |
346 | printk("Can't find property name in list !\n"); | |
347 | break; | |
348 | } | |
349 | if (strcmp(pname, "name") == 0) | |
350 | has_name = 1; | |
351 | l = strlen(pname) + 1; | |
352 | pp = unflatten_dt_alloc(&mem, sizeof(struct property), | |
353 | __alignof__(struct property)); | |
354 | if (allnextpp) { | |
355 | if (strcmp(pname, "linux,phandle") == 0) { | |
356 | np->node = *((u32 *)*p); | |
357 | if (np->linux_phandle == 0) | |
358 | np->linux_phandle = np->node; | |
359 | } | |
360 | if (strcmp(pname, "ibm,phandle") == 0) | |
361 | np->linux_phandle = *((u32 *)*p); | |
362 | pp->name = pname; | |
363 | pp->length = sz; | |
364 | pp->value = (void *)*p; | |
365 | *prev_pp = pp; | |
366 | prev_pp = &pp->next; | |
367 | } | |
368 | *p = _ALIGN((*p) + sz, 4); | |
369 | } | |
370 | /* with version 0x10 we may not have the name property, recreate | |
371 | * it here from the unit name if absent | |
372 | */ | |
373 | if (!has_name) { | |
374 | char *p = pathp, *ps = pathp, *pa = NULL; | |
375 | int sz; | |
376 | ||
377 | while (*p) { | |
378 | if ((*p) == '@') | |
379 | pa = p; | |
380 | if ((*p) == '/') | |
381 | ps = p + 1; | |
382 | p++; | |
383 | } | |
384 | if (pa < ps) | |
385 | pa = p; | |
386 | sz = (pa - ps) + 1; | |
387 | pp = unflatten_dt_alloc(&mem, sizeof(struct property) + sz, | |
388 | __alignof__(struct property)); | |
389 | if (allnextpp) { | |
390 | pp->name = "name"; | |
391 | pp->length = sz; | |
1a38147e | 392 | pp->value = pp + 1; |
9b6b563c PM |
393 | *prev_pp = pp; |
394 | prev_pp = &pp->next; | |
395 | memcpy(pp->value, ps, sz - 1); | |
396 | ((char *)pp->value)[sz - 1] = 0; | |
1a38147e SR |
397 | DBG("fixed up name for %s -> %s\n", pathp, |
398 | (char *)pp->value); | |
9b6b563c PM |
399 | } |
400 | } | |
401 | if (allnextpp) { | |
402 | *prev_pp = NULL; | |
0e56efc7 SR |
403 | np->name = of_get_property(np, "name", NULL); |
404 | np->type = of_get_property(np, "device_type", NULL); | |
9b6b563c PM |
405 | |
406 | if (!np->name) | |
407 | np->name = "<NULL>"; | |
408 | if (!np->type) | |
409 | np->type = "<NULL>"; | |
410 | } | |
411 | while (tag == OF_DT_BEGIN_NODE) { | |
412 | mem = unflatten_dt_node(mem, p, np, allnextpp, fpsize); | |
413 | tag = *((u32 *)(*p)); | |
414 | } | |
415 | if (tag != OF_DT_END_NODE) { | |
416 | printk("Weird tag at end of node: %x\n", tag); | |
417 | return mem; | |
418 | } | |
419 | *p += 4; | |
420 | return mem; | |
421 | } | |
422 | ||
2babf5c2 ME |
423 | static int __init early_parse_mem(char *p) |
424 | { | |
425 | if (!p) | |
426 | return 1; | |
427 | ||
428 | memory_limit = PAGE_ALIGN(memparse(p, &p)); | |
49a84965 | 429 | DBG("memory limit = 0x%llx\n", (unsigned long long)memory_limit); |
2babf5c2 ME |
430 | |
431 | return 0; | |
432 | } | |
433 | early_param("mem", early_parse_mem); | |
434 | ||
3c607ce2 LV |
435 | /** |
436 | * move_device_tree - move tree to an unused area, if needed. | |
437 | * | |
438 | * The device tree may be allocated beyond our memory limit, or inside the | |
439 | * crash kernel region for kdump. If so, move it out of the way. | |
2babf5c2 | 440 | */ |
18f032cb | 441 | static void __init move_device_tree(void) |
2babf5c2 ME |
442 | { |
443 | unsigned long start, size; | |
444 | void *p; | |
445 | ||
446 | DBG("-> move_device_tree\n"); | |
447 | ||
448 | start = __pa(initial_boot_params); | |
449 | size = initial_boot_params->totalsize; | |
450 | ||
451 | if ((memory_limit && (start + size) > memory_limit) || | |
452 | overlaps_crashkernel(start, size)) { | |
453 | p = __va(lmb_alloc_base(size, PAGE_SIZE, lmb.rmo_size)); | |
454 | memcpy(p, initial_boot_params, size); | |
455 | initial_boot_params = (struct boot_param_header *)p; | |
456 | DBG("Moved device tree to 0x%p\n", p); | |
457 | } | |
458 | ||
459 | DBG("<- move_device_tree\n"); | |
460 | } | |
9b6b563c PM |
461 | |
462 | /** | |
463 | * unflattens the device-tree passed by the firmware, creating the | |
464 | * tree of struct device_node. It also fills the "name" and "type" | |
465 | * pointers of the nodes so the normal device-tree walking functions | |
466 | * can be used (this used to be done by finish_device_tree) | |
467 | */ | |
468 | void __init unflatten_device_tree(void) | |
469 | { | |
470 | unsigned long start, mem, size; | |
471 | struct device_node **allnextp = &allnodes; | |
9b6b563c PM |
472 | |
473 | DBG(" -> unflatten_device_tree()\n"); | |
474 | ||
475 | /* First pass, scan for size */ | |
476 | start = ((unsigned long)initial_boot_params) + | |
477 | initial_boot_params->off_dt_struct; | |
478 | size = unflatten_dt_node(0, &start, NULL, NULL, 0); | |
479 | size = (size | 3) + 1; | |
480 | ||
481 | DBG(" size is %lx, allocating...\n", size); | |
482 | ||
483 | /* Allocate memory for the expanded device tree */ | |
484 | mem = lmb_alloc(size + 4, __alignof__(struct device_node)); | |
9b6b563c PM |
485 | mem = (unsigned long) __va(mem); |
486 | ||
487 | ((u32 *)mem)[size / 4] = 0xdeadbeef; | |
488 | ||
489 | DBG(" unflattening %lx...\n", mem); | |
490 | ||
491 | /* Second pass, do actual unflattening */ | |
492 | start = ((unsigned long)initial_boot_params) + | |
493 | initial_boot_params->off_dt_struct; | |
494 | unflatten_dt_node(mem, &start, NULL, &allnextp, 0); | |
495 | if (*((u32 *)start) != OF_DT_END) | |
496 | printk(KERN_WARNING "Weird tag at end of tree: %08x\n", *((u32 *)start)); | |
497 | if (((u32 *)mem)[size / 4] != 0xdeadbeef) | |
498 | printk(KERN_WARNING "End of tree marker overwritten: %08x\n", | |
499 | ((u32 *)mem)[size / 4] ); | |
500 | *allnextp = NULL; | |
501 | ||
502 | /* Get pointer to OF "/chosen" node for use everywhere */ | |
503 | of_chosen = of_find_node_by_path("/chosen"); | |
a575b807 PM |
504 | if (of_chosen == NULL) |
505 | of_chosen = of_find_node_by_path("/chosen@0"); | |
9b6b563c | 506 | |
9b6b563c PM |
507 | DBG(" <- unflatten_device_tree()\n"); |
508 | } | |
509 | ||
d205819e PM |
510 | /* |
511 | * ibm,pa-features is a per-cpu property that contains a string of | |
512 | * attribute descriptors, each of which has a 2 byte header plus up | |
513 | * to 254 bytes worth of processor attribute bits. First header | |
514 | * byte specifies the number of bytes following the header. | |
515 | * Second header byte is an "attribute-specifier" type, of which | |
516 | * zero is the only currently-defined value. | |
517 | * Implementation: Pass in the byte and bit offset for the feature | |
518 | * that we are interested in. The function will return -1 if the | |
519 | * pa-features property is missing, or a 1/0 to indicate if the feature | |
520 | * is supported/not supported. Note that the bit numbers are | |
521 | * big-endian to match the definition in PAPR. | |
522 | */ | |
523 | static struct ibm_pa_feature { | |
524 | unsigned long cpu_features; /* CPU_FTR_xxx bit */ | |
525 | unsigned int cpu_user_ftrs; /* PPC_FEATURE_xxx bit */ | |
526 | unsigned char pabyte; /* byte number in ibm,pa-features */ | |
527 | unsigned char pabit; /* bit number (big-endian) */ | |
528 | unsigned char invert; /* if 1, pa bit set => clear feature */ | |
529 | } ibm_pa_features[] __initdata = { | |
530 | {0, PPC_FEATURE_HAS_MMU, 0, 0, 0}, | |
531 | {0, PPC_FEATURE_HAS_FPU, 0, 1, 0}, | |
532 | {CPU_FTR_SLB, 0, 0, 2, 0}, | |
533 | {CPU_FTR_CTRL, 0, 0, 3, 0}, | |
534 | {CPU_FTR_NOEXECUTE, 0, 0, 6, 0}, | |
535 | {CPU_FTR_NODSISRALIGN, 0, 1, 1, 1}, | |
536 | {CPU_FTR_CI_LARGE_PAGE, 0, 1, 2, 0}, | |
339d76c5 | 537 | {CPU_FTR_REAL_LE, PPC_FEATURE_TRUE_LE, 5, 0, 0}, |
d205819e PM |
538 | }; |
539 | ||
974a76f5 PM |
540 | static void __init scan_features(unsigned long node, unsigned char *ftrs, |
541 | unsigned long tablelen, | |
542 | struct ibm_pa_feature *fp, | |
543 | unsigned long ft_size) | |
d205819e | 544 | { |
974a76f5 | 545 | unsigned long i, len, bit; |
d205819e PM |
546 | |
547 | /* find descriptor with type == 0 */ | |
548 | for (;;) { | |
549 | if (tablelen < 3) | |
550 | return; | |
974a76f5 | 551 | len = 2 + ftrs[0]; |
d205819e PM |
552 | if (tablelen < len) |
553 | return; /* descriptor 0 not found */ | |
974a76f5 | 554 | if (ftrs[1] == 0) |
d205819e PM |
555 | break; |
556 | tablelen -= len; | |
974a76f5 | 557 | ftrs += len; |
d205819e PM |
558 | } |
559 | ||
560 | /* loop over bits we know about */ | |
974a76f5 PM |
561 | for (i = 0; i < ft_size; ++i, ++fp) { |
562 | if (fp->pabyte >= ftrs[0]) | |
d205819e | 563 | continue; |
974a76f5 | 564 | bit = (ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1; |
d205819e PM |
565 | if (bit ^ fp->invert) { |
566 | cur_cpu_spec->cpu_features |= fp->cpu_features; | |
567 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs; | |
568 | } else { | |
569 | cur_cpu_spec->cpu_features &= ~fp->cpu_features; | |
570 | cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs; | |
571 | } | |
572 | } | |
573 | } | |
574 | ||
974a76f5 PM |
575 | static void __init check_cpu_pa_features(unsigned long node) |
576 | { | |
577 | unsigned char *pa_ftrs; | |
578 | unsigned long tablelen; | |
579 | ||
580 | pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen); | |
581 | if (pa_ftrs == NULL) | |
582 | return; | |
583 | ||
584 | scan_features(node, pa_ftrs, tablelen, | |
585 | ibm_pa_features, ARRAY_SIZE(ibm_pa_features)); | |
586 | } | |
587 | ||
584f8b71 MN |
588 | #ifdef CONFIG_PPC64 |
589 | static void __init check_cpu_slb_size(unsigned long node) | |
590 | { | |
591 | u32 *slb_size_ptr; | |
592 | ||
b60c31d8 MN |
593 | slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL); |
594 | if (slb_size_ptr != NULL) { | |
595 | mmu_slb_size = *slb_size_ptr; | |
596 | return; | |
597 | } | |
584f8b71 MN |
598 | slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL); |
599 | if (slb_size_ptr != NULL) { | |
600 | mmu_slb_size = *slb_size_ptr; | |
601 | } | |
602 | } | |
603 | #else | |
604 | #define check_cpu_slb_size(node) do { } while(0) | |
605 | #endif | |
606 | ||
974a76f5 PM |
607 | static struct feature_property { |
608 | const char *name; | |
609 | u32 min_value; | |
610 | unsigned long cpu_feature; | |
611 | unsigned long cpu_user_ftr; | |
612 | } feature_properties[] __initdata = { | |
613 | #ifdef CONFIG_ALTIVEC | |
614 | {"altivec", 0, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
615 | {"ibm,vmx", 1, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC}, | |
616 | #endif /* CONFIG_ALTIVEC */ | |
b962ce9d MN |
617 | #ifdef CONFIG_VSX |
618 | /* Yes, this _really_ is ibm,vmx == 2 to enable VSX */ | |
619 | {"ibm,vmx", 2, CPU_FTR_VSX, PPC_FEATURE_HAS_VSX}, | |
620 | #endif /* CONFIG_VSX */ | |
974a76f5 PM |
621 | #ifdef CONFIG_PPC64 |
622 | {"ibm,dfp", 1, 0, PPC_FEATURE_HAS_DFP}, | |
623 | {"ibm,purr", 1, CPU_FTR_PURR, 0}, | |
624 | {"ibm,spurr", 1, CPU_FTR_SPURR, 0}, | |
625 | #endif /* CONFIG_PPC64 */ | |
626 | }; | |
627 | ||
14b3d926 VB |
628 | #if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU) |
629 | static inline void identical_pvr_fixup(unsigned long node) | |
630 | { | |
631 | unsigned int pvr; | |
632 | char *model = of_get_flat_dt_prop(node, "model", NULL); | |
633 | ||
634 | /* | |
635 | * Since 440GR(x)/440EP(x) processors have the same pvr, | |
636 | * we check the node path and set bit 28 in the cur_cpu_spec | |
637 | * pvr for EP(x) processor version. This bit is always 0 in | |
638 | * the "real" pvr. Then we call identify_cpu again with | |
639 | * the new logical pvr to enable FPU support. | |
640 | */ | |
641 | if (model && strstr(model, "440EP")) { | |
642 | pvr = cur_cpu_spec->pvr_value | 0x8; | |
643 | identify_cpu(0, pvr); | |
644 | DBG("Using logical pvr %x for %s\n", pvr, model); | |
645 | } | |
646 | } | |
647 | #else | |
648 | #define identical_pvr_fixup(node) do { } while(0) | |
649 | #endif | |
650 | ||
974a76f5 PM |
651 | static void __init check_cpu_feature_properties(unsigned long node) |
652 | { | |
653 | unsigned long i; | |
654 | struct feature_property *fp = feature_properties; | |
655 | const u32 *prop; | |
656 | ||
657 | for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) { | |
658 | prop = of_get_flat_dt_prop(node, fp->name, NULL); | |
659 | if (prop && *prop >= fp->min_value) { | |
660 | cur_cpu_spec->cpu_features |= fp->cpu_feature; | |
661 | cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr; | |
662 | } | |
663 | } | |
664 | } | |
665 | ||
9b6b563c | 666 | static int __init early_init_dt_scan_cpus(unsigned long node, |
4df20460 AB |
667 | const char *uname, int depth, |
668 | void *data) | |
9b6b563c | 669 | { |
4df20460 AB |
670 | static int logical_cpuid = 0; |
671 | char *type = of_get_flat_dt_prop(node, "device_type", NULL); | |
974a76f5 PM |
672 | const u32 *prop; |
673 | const u32 *intserv; | |
4df20460 AB |
674 | int i, nthreads; |
675 | unsigned long len; | |
676 | int found = 0; | |
9b6b563c PM |
677 | |
678 | /* We are scanning "cpu" nodes only */ | |
679 | if (type == NULL || strcmp(type, "cpu") != 0) | |
680 | return 0; | |
681 | ||
4df20460 AB |
682 | /* Get physical cpuid */ |
683 | intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len); | |
684 | if (intserv) { | |
685 | nthreads = len / sizeof(int); | |
9b6b563c | 686 | } else { |
4df20460 AB |
687 | intserv = of_get_flat_dt_prop(node, "reg", NULL); |
688 | nthreads = 1; | |
689 | } | |
690 | ||
691 | /* | |
692 | * Now see if any of these threads match our boot cpu. | |
693 | * NOTE: This must match the parsing done in smp_setup_cpu_maps. | |
694 | */ | |
695 | for (i = 0; i < nthreads; i++) { | |
696 | /* | |
697 | * version 2 of the kexec param format adds the phys cpuid of | |
698 | * booted proc. | |
699 | */ | |
700 | if (initial_boot_params && initial_boot_params->version >= 2) { | |
701 | if (intserv[i] == | |
702 | initial_boot_params->boot_cpuid_phys) { | |
703 | found = 1; | |
704 | break; | |
705 | } | |
706 | } else { | |
707 | /* | |
708 | * Check if it's the boot-cpu, set it's hw index now, | |
709 | * unfortunately this format did not support booting | |
710 | * off secondary threads. | |
711 | */ | |
712 | if (of_get_flat_dt_prop(node, | |
3c726f8d | 713 | "linux,boot-cpu", NULL) != NULL) { |
4df20460 AB |
714 | found = 1; |
715 | break; | |
716 | } | |
9b6b563c | 717 | } |
4df20460 AB |
718 | |
719 | #ifdef CONFIG_SMP | |
720 | /* logical cpu id is always 0 on UP kernels */ | |
721 | logical_cpuid++; | |
722 | #endif | |
723 | } | |
724 | ||
725 | if (found) { | |
726 | DBG("boot cpu: logical %d physical %d\n", logical_cpuid, | |
727 | intserv[i]); | |
728 | boot_cpuid = logical_cpuid; | |
729 | set_hard_smp_processor_id(boot_cpuid, intserv[i]); | |
9b6b563c | 730 | |
974a76f5 PM |
731 | /* |
732 | * PAPR defines "logical" PVR values for cpus that | |
733 | * meet various levels of the architecture: | |
734 | * 0x0f000001 Architecture version 2.04 | |
735 | * 0x0f000002 Architecture version 2.05 | |
736 | * If the cpu-version property in the cpu node contains | |
737 | * such a value, we call identify_cpu again with the | |
738 | * logical PVR value in order to use the cpu feature | |
739 | * bits appropriate for the architecture level. | |
740 | * | |
741 | * A POWER6 partition in "POWER6 architected" mode | |
742 | * uses the 0x0f000002 PVR value; in POWER5+ mode | |
743 | * it uses 0x0f000001. | |
744 | */ | |
745 | prop = of_get_flat_dt_prop(node, "cpu-version", NULL); | |
746 | if (prop && (*prop & 0xff000000) == 0x0f000000) | |
747 | identify_cpu(0, *prop); | |
14b3d926 VB |
748 | |
749 | identical_pvr_fixup(node); | |
9b6b563c | 750 | } |
9b6b563c | 751 | |
974a76f5 | 752 | check_cpu_feature_properties(node); |
d205819e | 753 | check_cpu_pa_features(node); |
584f8b71 | 754 | check_cpu_slb_size(node); |
d205819e | 755 | |
9b6b563c | 756 | #ifdef CONFIG_PPC_PSERIES |
4df20460 | 757 | if (nthreads > 1) |
9b6b563c | 758 | cur_cpu_spec->cpu_features |= CPU_FTR_SMT; |
4df20460 AB |
759 | else |
760 | cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT; | |
9b6b563c PM |
761 | #endif |
762 | ||
763 | return 0; | |
764 | } | |
765 | ||
40472a55 ME |
766 | #ifdef CONFIG_BLK_DEV_INITRD |
767 | static void __init early_init_dt_check_for_initrd(unsigned long node) | |
768 | { | |
769 | unsigned long l; | |
770 | u32 *prop; | |
771 | ||
772 | DBG("Looking for initrd properties... "); | |
773 | ||
774 | prop = of_get_flat_dt_prop(node, "linux,initrd-start", &l); | |
775 | if (prop) { | |
776 | initrd_start = (unsigned long)__va(of_read_ulong(prop, l/4)); | |
777 | ||
778 | prop = of_get_flat_dt_prop(node, "linux,initrd-end", &l); | |
779 | if (prop) { | |
780 | initrd_end = (unsigned long) | |
781 | __va(of_read_ulong(prop, l/4)); | |
782 | initrd_below_start_ok = 1; | |
783 | } else { | |
784 | initrd_start = 0; | |
785 | } | |
786 | } | |
787 | ||
788 | DBG("initrd_start=0x%lx initrd_end=0x%lx\n", initrd_start, initrd_end); | |
789 | } | |
790 | #else | |
791 | static inline void early_init_dt_check_for_initrd(unsigned long node) | |
792 | { | |
793 | } | |
794 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
795 | ||
9b6b563c PM |
796 | static int __init early_init_dt_scan_chosen(unsigned long node, |
797 | const char *uname, int depth, void *data) | |
798 | { | |
9b6b563c | 799 | unsigned long *lprop; |
329dda08 KG |
800 | unsigned long l; |
801 | char *p; | |
9b6b563c PM |
802 | |
803 | DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname); | |
804 | ||
a575b807 PM |
805 | if (depth != 1 || |
806 | (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0)) | |
9b6b563c PM |
807 | return 0; |
808 | ||
9b6b563c PM |
809 | #ifdef CONFIG_PPC64 |
810 | /* check if iommu is forced on or off */ | |
3c726f8d | 811 | if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL) |
9b6b563c | 812 | iommu_is_off = 1; |
3c726f8d | 813 | if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL) |
9b6b563c PM |
814 | iommu_force_on = 1; |
815 | #endif | |
816 | ||
2babf5c2 | 817 | /* mem=x on the command line is the preferred mechanism */ |
3c726f8d | 818 | lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL); |
9b6b563c PM |
819 | if (lprop) |
820 | memory_limit = *lprop; | |
821 | ||
822 | #ifdef CONFIG_PPC64 | |
3c726f8d | 823 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL); |
9b6b563c PM |
824 | if (lprop) |
825 | tce_alloc_start = *lprop; | |
3c726f8d | 826 | lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL); |
9b6b563c PM |
827 | if (lprop) |
828 | tce_alloc_end = *lprop; | |
829 | #endif | |
830 | ||
dcee3036 | 831 | #ifdef CONFIG_KEXEC |
63277161 | 832 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL); |
70c6cc37 LV |
833 | if (lprop) |
834 | crashk_res.start = *lprop; | |
dcee3036 | 835 | |
63277161 | 836 | lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL); |
70c6cc37 LV |
837 | if (lprop) |
838 | crashk_res.end = crashk_res.start + *lprop - 1; | |
dcee3036 ME |
839 | #endif |
840 | ||
40472a55 | 841 | early_init_dt_check_for_initrd(node); |
30437b3e | 842 | |
329dda08 KG |
843 | /* Retreive command line */ |
844 | p = of_get_flat_dt_prop(node, "bootargs", &l); | |
845 | if (p != NULL && l > 0) | |
846 | strlcpy(cmd_line, p, min((int)l, COMMAND_LINE_SIZE)); | |
847 | ||
848 | #ifdef CONFIG_CMDLINE | |
c1ce464d | 849 | if (p == NULL || l == 0 || (l == 1 && (*p) == 0)) |
329dda08 KG |
850 | strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); |
851 | #endif /* CONFIG_CMDLINE */ | |
852 | ||
853 | DBG("Command line is: %s\n", cmd_line); | |
854 | ||
9b6b563c PM |
855 | /* break now */ |
856 | return 1; | |
857 | } | |
858 | ||
859 | static int __init early_init_dt_scan_root(unsigned long node, | |
860 | const char *uname, int depth, void *data) | |
861 | { | |
862 | u32 *prop; | |
863 | ||
864 | if (depth != 0) | |
865 | return 0; | |
866 | ||
3c726f8d | 867 | prop = of_get_flat_dt_prop(node, "#size-cells", NULL); |
9b6b563c PM |
868 | dt_root_size_cells = (prop == NULL) ? 1 : *prop; |
869 | DBG("dt_root_size_cells = %x\n", dt_root_size_cells); | |
870 | ||
3c726f8d | 871 | prop = of_get_flat_dt_prop(node, "#address-cells", NULL); |
9b6b563c PM |
872 | dt_root_addr_cells = (prop == NULL) ? 2 : *prop; |
873 | DBG("dt_root_addr_cells = %x\n", dt_root_addr_cells); | |
874 | ||
875 | /* break now */ | |
876 | return 1; | |
877 | } | |
878 | ||
abe76885 | 879 | static u64 __init dt_mem_next_cell(int s, cell_t **cellp) |
9b6b563c PM |
880 | { |
881 | cell_t *p = *cellp; | |
9b6b563c | 882 | |
a4dc7ff0 | 883 | *cellp = p + s; |
abe76885 | 884 | return of_read_number(p, s); |
9b6b563c PM |
885 | } |
886 | ||
0204568a PM |
887 | #ifdef CONFIG_PPC_PSERIES |
888 | /* | |
889 | * Interpret the ibm,dynamic-memory property in the | |
890 | * /ibm,dynamic-reconfiguration-memory node. | |
891 | * This contains a list of memory blocks along with NUMA affinity | |
892 | * information. | |
893 | */ | |
894 | static int __init early_init_dt_scan_drconf_memory(unsigned long node) | |
895 | { | |
cf00085d | 896 | cell_t *dm, *ls, *usm; |
abe76885 BB |
897 | unsigned long l, n, flags; |
898 | u64 base, size, lmb_size; | |
cf00085d | 899 | unsigned int is_kexec_kdump = 0, rngs; |
0204568a | 900 | |
63277161 | 901 | ls = of_get_flat_dt_prop(node, "ibm,lmb-size", &l); |
0204568a PM |
902 | if (ls == NULL || l < dt_root_size_cells * sizeof(cell_t)) |
903 | return 0; | |
904 | lmb_size = dt_mem_next_cell(dt_root_size_cells, &ls); | |
905 | ||
63277161 | 906 | dm = of_get_flat_dt_prop(node, "ibm,dynamic-memory", &l); |
0204568a PM |
907 | if (dm == NULL || l < sizeof(cell_t)) |
908 | return 0; | |
909 | ||
910 | n = *dm++; /* number of entries */ | |
911 | if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(cell_t)) | |
912 | return 0; | |
913 | ||
cf00085d | 914 | /* check if this is a kexec/kdump kernel. */ |
63277161 | 915 | usm = of_get_flat_dt_prop(node, "linux,drconf-usable-memory", |
cf00085d C |
916 | &l); |
917 | if (usm != NULL) | |
918 | is_kexec_kdump = 1; | |
919 | ||
0204568a PM |
920 | for (; n != 0; --n) { |
921 | base = dt_mem_next_cell(dt_root_addr_cells, &dm); | |
922 | flags = dm[3]; | |
923 | /* skip DRC index, pad, assoc. list index, flags */ | |
924 | dm += 4; | |
925 | /* skip this block if the reserved bit is set in flags (0x80) | |
926 | or if the block is not assigned to this partition (0x8) */ | |
927 | if ((flags & 0x80) || !(flags & 0x8)) | |
928 | continue; | |
929 | size = lmb_size; | |
cf00085d C |
930 | rngs = 1; |
931 | if (is_kexec_kdump) { | |
932 | /* | |
933 | * For each lmb in ibm,dynamic-memory, a corresponding | |
934 | * entry in linux,drconf-usable-memory property contains | |
935 | * a counter 'p' followed by 'p' (base, size) duple. | |
936 | * Now read the counter from | |
937 | * linux,drconf-usable-memory property | |
938 | */ | |
939 | rngs = dt_mem_next_cell(dt_root_size_cells, &usm); | |
940 | if (!rngs) /* there are no (base, size) duple */ | |
0204568a | 941 | continue; |
0204568a | 942 | } |
cf00085d C |
943 | do { |
944 | if (is_kexec_kdump) { | |
945 | base = dt_mem_next_cell(dt_root_addr_cells, | |
946 | &usm); | |
947 | size = dt_mem_next_cell(dt_root_size_cells, | |
948 | &usm); | |
949 | } | |
950 | if (iommu_is_off) { | |
951 | if (base >= 0x80000000ul) | |
952 | continue; | |
953 | if ((base + size) > 0x80000000ul) | |
954 | size = 0x80000000ul - base; | |
955 | } | |
956 | lmb_add(base, size); | |
957 | } while (--rngs); | |
0204568a PM |
958 | } |
959 | lmb_dump_all(); | |
960 | return 0; | |
961 | } | |
962 | #else | |
963 | #define early_init_dt_scan_drconf_memory(node) 0 | |
964 | #endif /* CONFIG_PPC_PSERIES */ | |
9b6b563c PM |
965 | |
966 | static int __init early_init_dt_scan_memory(unsigned long node, | |
967 | const char *uname, int depth, void *data) | |
968 | { | |
3c726f8d | 969 | char *type = of_get_flat_dt_prop(node, "device_type", NULL); |
9b6b563c PM |
970 | cell_t *reg, *endp; |
971 | unsigned long l; | |
972 | ||
0204568a PM |
973 | /* Look for the ibm,dynamic-reconfiguration-memory node */ |
974 | if (depth == 1 && | |
975 | strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0) | |
976 | return early_init_dt_scan_drconf_memory(node); | |
977 | ||
9b6b563c | 978 | /* We are scanning "memory" nodes only */ |
a23414be PM |
979 | if (type == NULL) { |
980 | /* | |
981 | * The longtrail doesn't have a device_type on the | |
982 | * /memory node, so look for the node called /memory@0. | |
983 | */ | |
984 | if (depth != 1 || strcmp(uname, "memory@0") != 0) | |
985 | return 0; | |
986 | } else if (strcmp(type, "memory") != 0) | |
9b6b563c PM |
987 | return 0; |
988 | ||
63277161 | 989 | reg = of_get_flat_dt_prop(node, "linux,usable-memory", &l); |
ba759485 | 990 | if (reg == NULL) |
63277161 | 991 | reg = of_get_flat_dt_prop(node, "reg", &l); |
9b6b563c PM |
992 | if (reg == NULL) |
993 | return 0; | |
994 | ||
995 | endp = reg + (l / sizeof(cell_t)); | |
996 | ||
358c86fd | 997 | DBG("memory scan node %s, reg size %ld, data: %x %x %x %x,\n", |
9b6b563c PM |
998 | uname, l, reg[0], reg[1], reg[2], reg[3]); |
999 | ||
1000 | while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) { | |
abe76885 | 1001 | u64 base, size; |
9b6b563c PM |
1002 | |
1003 | base = dt_mem_next_cell(dt_root_addr_cells, ®); | |
1004 | size = dt_mem_next_cell(dt_root_size_cells, ®); | |
1005 | ||
1006 | if (size == 0) | |
1007 | continue; | |
abe76885 BB |
1008 | DBG(" - %llx , %llx\n", (unsigned long long)base, |
1009 | (unsigned long long)size); | |
9b6b563c PM |
1010 | #ifdef CONFIG_PPC64 |
1011 | if (iommu_is_off) { | |
1012 | if (base >= 0x80000000ul) | |
1013 | continue; | |
1014 | if ((base + size) > 0x80000000ul) | |
1015 | size = 0x80000000ul - base; | |
1016 | } | |
1017 | #endif | |
1018 | lmb_add(base, size); | |
37dd2bad KG |
1019 | |
1020 | memstart_addr = min((u64)memstart_addr, base); | |
9b6b563c | 1021 | } |
37dd2bad | 1022 | |
9b6b563c PM |
1023 | return 0; |
1024 | } | |
1025 | ||
1026 | static void __init early_reserve_mem(void) | |
1027 | { | |
cbbcf340 KG |
1028 | u64 base, size; |
1029 | u64 *reserve_map; | |
8a300887 JL |
1030 | unsigned long self_base; |
1031 | unsigned long self_size; | |
9b6b563c | 1032 | |
cbbcf340 | 1033 | reserve_map = (u64 *)(((unsigned long)initial_boot_params) + |
9b6b563c | 1034 | initial_boot_params->off_mem_rsvmap); |
4d1f3f25 JX |
1035 | |
1036 | /* before we do anything, lets reserve the dt blob */ | |
8a300887 JL |
1037 | self_base = __pa((unsigned long)initial_boot_params); |
1038 | self_size = initial_boot_params->totalsize; | |
1039 | lmb_reserve(self_base, self_size); | |
4d1f3f25 | 1040 | |
30437b3e DG |
1041 | #ifdef CONFIG_BLK_DEV_INITRD |
1042 | /* then reserve the initrd, if any */ | |
1043 | if (initrd_start && (initrd_end > initrd_start)) | |
1044 | lmb_reserve(__pa(initrd_start), initrd_end - initrd_start); | |
1045 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
1046 | ||
cbbcf340 KG |
1047 | #ifdef CONFIG_PPC32 |
1048 | /* | |
1049 | * Handle the case where we might be booting from an old kexec | |
1050 | * image that setup the mem_rsvmap as pairs of 32-bit values | |
1051 | */ | |
1052 | if (*reserve_map > 0xffffffffull) { | |
1053 | u32 base_32, size_32; | |
1054 | u32 *reserve_map_32 = (u32 *)reserve_map; | |
1055 | ||
1056 | while (1) { | |
1057 | base_32 = *(reserve_map_32++); | |
1058 | size_32 = *(reserve_map_32++); | |
1059 | if (size_32 == 0) | |
1060 | break; | |
8a300887 JL |
1061 | /* skip if the reservation is for the blob */ |
1062 | if (base_32 == self_base && size_32 == self_size) | |
1063 | continue; | |
329dda08 | 1064 | DBG("reserving: %x -> %x\n", base_32, size_32); |
cbbcf340 KG |
1065 | lmb_reserve(base_32, size_32); |
1066 | } | |
1067 | return; | |
1068 | } | |
1069 | #endif | |
9b6b563c PM |
1070 | while (1) { |
1071 | base = *(reserve_map++); | |
1072 | size = *(reserve_map++); | |
1073 | if (size == 0) | |
1074 | break; | |
cbbcf340 | 1075 | DBG("reserving: %llx -> %llx\n", base, size); |
9b6b563c PM |
1076 | lmb_reserve(base, size); |
1077 | } | |
9b6b563c PM |
1078 | } |
1079 | ||
6ac26c8a | 1080 | #ifdef CONFIG_PHYP_DUMP |
37ddd5d0 MA |
1081 | /** |
1082 | * phyp_dump_calculate_reserve_size() - reserve variable boot area 5% or arg | |
1083 | * | |
1084 | * Function to find the largest size we need to reserve | |
1085 | * during early boot process. | |
1086 | * | |
1087 | * It either looks for boot param and returns that OR | |
1088 | * returns larger of 256 or 5% rounded down to multiples of 256MB. | |
1089 | * | |
1090 | */ | |
1091 | static inline unsigned long phyp_dump_calculate_reserve_size(void) | |
1092 | { | |
1093 | unsigned long tmp; | |
1094 | ||
1095 | if (phyp_dump_info->reserve_bootvar) | |
1096 | return phyp_dump_info->reserve_bootvar; | |
1097 | ||
1098 | /* divide by 20 to get 5% of value */ | |
1099 | tmp = lmb_end_of_DRAM(); | |
1100 | do_div(tmp, 20); | |
1101 | ||
1102 | /* round it down in multiples of 256 */ | |
1103 | tmp = tmp & ~0x0FFFFFFFUL; | |
1104 | ||
1105 | return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END); | |
1106 | } | |
1107 | ||
6ac26c8a MA |
1108 | /** |
1109 | * phyp_dump_reserve_mem() - reserve all not-yet-dumped mmemory | |
1110 | * | |
1111 | * This routine may reserve memory regions in the kernel only | |
1112 | * if the system is supported and a dump was taken in last | |
1113 | * boot instance or if the hardware is supported and the | |
1114 | * scratch area needs to be setup. In other instances it returns | |
1115 | * without reserving anything. The memory in case of dump being | |
1116 | * active is freed when the dump is collected (by userland tools). | |
1117 | */ | |
1118 | static void __init phyp_dump_reserve_mem(void) | |
1119 | { | |
1120 | unsigned long base, size; | |
37ddd5d0 MA |
1121 | unsigned long variable_reserve_size; |
1122 | ||
6ac26c8a MA |
1123 | if (!phyp_dump_info->phyp_dump_configured) { |
1124 | printk(KERN_ERR "Phyp-dump not supported on this hardware\n"); | |
1125 | return; | |
1126 | } | |
1127 | ||
654f596d MA |
1128 | if (!phyp_dump_info->phyp_dump_at_boot) { |
1129 | printk(KERN_INFO "Phyp-dump disabled at boot time\n"); | |
1130 | return; | |
1131 | } | |
1132 | ||
37ddd5d0 MA |
1133 | variable_reserve_size = phyp_dump_calculate_reserve_size(); |
1134 | ||
6ac26c8a MA |
1135 | if (phyp_dump_info->phyp_dump_is_active) { |
1136 | /* Reserve *everything* above RMR.Area freed by userland tools*/ | |
37ddd5d0 | 1137 | base = variable_reserve_size; |
6ac26c8a MA |
1138 | size = lmb_end_of_DRAM() - base; |
1139 | ||
1140 | /* XXX crashed_ram_end is wrong, since it may be beyond | |
1141 | * the memory_limit, it will need to be adjusted. */ | |
1142 | lmb_reserve(base, size); | |
1143 | ||
1144 | phyp_dump_info->init_reserve_start = base; | |
1145 | phyp_dump_info->init_reserve_size = size; | |
1146 | } else { | |
1147 | size = phyp_dump_info->cpu_state_size + | |
1148 | phyp_dump_info->hpte_region_size + | |
37ddd5d0 | 1149 | variable_reserve_size; |
6ac26c8a MA |
1150 | base = lmb_end_of_DRAM() - size; |
1151 | lmb_reserve(base, size); | |
1152 | phyp_dump_info->init_reserve_start = base; | |
1153 | phyp_dump_info->init_reserve_size = size; | |
1154 | } | |
1155 | } | |
1156 | #else | |
1157 | static inline void __init phyp_dump_reserve_mem(void) {} | |
1158 | #endif /* CONFIG_PHYP_DUMP && CONFIG_PPC_RTAS */ | |
1159 | ||
1160 | ||
9b6b563c PM |
1161 | void __init early_init_devtree(void *params) |
1162 | { | |
49a84965 | 1163 | phys_addr_t limit; |
6ca4f749 | 1164 | |
44348105 | 1165 | DBG(" -> early_init_devtree(%p)\n", params); |
9b6b563c PM |
1166 | |
1167 | /* Setup flat device-tree pointer */ | |
1168 | initial_boot_params = params; | |
1169 | ||
458148c0 ME |
1170 | #ifdef CONFIG_PPC_RTAS |
1171 | /* Some machines might need RTAS info for debugging, grab it now. */ | |
1172 | of_scan_flat_dt(early_init_dt_scan_rtas, NULL); | |
1173 | #endif | |
1174 | ||
6ac26c8a MA |
1175 | #ifdef CONFIG_PHYP_DUMP |
1176 | /* scan tree to see if dump occured during last boot */ | |
1177 | of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL); | |
1178 | #endif | |
1179 | ||
9b6b563c PM |
1180 | /* Retrieve various informations from the /chosen node of the |
1181 | * device-tree, including the platform type, initrd location and | |
1182 | * size, TCE reserve, and more ... | |
1183 | */ | |
3c726f8d | 1184 | of_scan_flat_dt(early_init_dt_scan_chosen, NULL); |
9b6b563c PM |
1185 | |
1186 | /* Scan memory nodes and rebuild LMBs */ | |
1187 | lmb_init(); | |
3c726f8d BH |
1188 | of_scan_flat_dt(early_init_dt_scan_root, NULL); |
1189 | of_scan_flat_dt(early_init_dt_scan_memory, NULL); | |
846f77b0 ME |
1190 | |
1191 | /* Save command line for /proc/cmdline and then parse parameters */ | |
b8757b21 | 1192 | strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); |
846f77b0 ME |
1193 | parse_early_param(); |
1194 | ||
9b6b563c | 1195 | /* Reserve LMB regions used by kernel, initrd, dt, etc... */ |
0cc4746c | 1196 | lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); |
549e8152 PM |
1197 | /* If relocatable, reserve first 32k for interrupt vectors etc. */ |
1198 | if (PHYSICAL_START > MEMORY_START) | |
1199 | lmb_reserve(MEMORY_START, 0x8000); | |
47310413 | 1200 | reserve_kdump_trampoline(); |
35dd5432 | 1201 | reserve_crashkernel(); |
9b6b563c | 1202 | early_reserve_mem(); |
6ac26c8a | 1203 | phyp_dump_reserve_mem(); |
9b6b563c | 1204 | |
6ca4f749 HB |
1205 | limit = memory_limit; |
1206 | if (! limit) { | |
49a84965 | 1207 | phys_addr_t memsize; |
6ca4f749 HB |
1208 | |
1209 | /* Ensure that total memory size is page-aligned, because | |
1210 | * otherwise mark_bootmem() gets upset. */ | |
1211 | lmb_analyze(); | |
1212 | memsize = lmb_phys_mem_size(); | |
1213 | if ((memsize & PAGE_MASK) != memsize) | |
1214 | limit = memsize & PAGE_MASK; | |
1215 | } | |
1216 | lmb_enforce_memory_limit(limit); | |
1217 | ||
2babf5c2 | 1218 | lmb_analyze(); |
059f134f | 1219 | lmb_dump_all(); |
2babf5c2 | 1220 | |
49a84965 | 1221 | DBG("Phys. mem: %llx\n", lmb_phys_mem_size()); |
2babf5c2 ME |
1222 | |
1223 | /* We may need to relocate the flat tree, do it now. | |
1224 | * FIXME .. and the initrd too? */ | |
1225 | move_device_tree(); | |
1226 | ||
9b6b563c PM |
1227 | DBG("Scanning CPUs ...\n"); |
1228 | ||
3c726f8d BH |
1229 | /* Retreive CPU related informations from the flat tree |
1230 | * (altivec support, boot CPU ID, ...) | |
9b6b563c | 1231 | */ |
3c726f8d | 1232 | of_scan_flat_dt(early_init_dt_scan_cpus, NULL); |
9b6b563c | 1233 | |
9b6b563c PM |
1234 | DBG(" <- early_init_devtree()\n"); |
1235 | } | |
1236 | ||
9b6b563c | 1237 | |
9b6b563c PM |
1238 | /** |
1239 | * Indicates whether the root node has a given value in its | |
1240 | * compatible property. | |
1241 | */ | |
1242 | int machine_is_compatible(const char *compat) | |
1243 | { | |
1244 | struct device_node *root; | |
1245 | int rc = 0; | |
1246 | ||
1247 | root = of_find_node_by_path("/"); | |
1248 | if (root) { | |
7a92f74f | 1249 | rc = of_device_is_compatible(root, compat); |
9b6b563c PM |
1250 | of_node_put(root); |
1251 | } | |
1252 | return rc; | |
1253 | } | |
1254 | EXPORT_SYMBOL(machine_is_compatible); | |
1255 | ||
9b6b563c PM |
1256 | /******* |
1257 | * | |
1258 | * New implementation of the OF "find" APIs, return a refcounted | |
1259 | * object, call of_node_put() when done. The device tree and list | |
1260 | * are protected by a rw_lock. | |
1261 | * | |
1262 | * Note that property management will need some locking as well, | |
1263 | * this isn't dealt with yet. | |
1264 | * | |
1265 | *******/ | |
1266 | ||
9b6b563c PM |
1267 | /** |
1268 | * of_find_node_by_phandle - Find a node given a phandle | |
1269 | * @handle: phandle of the node to find | |
1270 | * | |
1271 | * Returns a node pointer with refcount incremented, use | |
1272 | * of_node_put() on it when done. | |
1273 | */ | |
1274 | struct device_node *of_find_node_by_phandle(phandle handle) | |
1275 | { | |
1276 | struct device_node *np; | |
1277 | ||
1278 | read_lock(&devtree_lock); | |
1279 | for (np = allnodes; np != 0; np = np->allnext) | |
1280 | if (np->linux_phandle == handle) | |
1281 | break; | |
b1374051 | 1282 | of_node_get(np); |
9b6b563c PM |
1283 | read_unlock(&devtree_lock); |
1284 | return np; | |
1285 | } | |
1286 | EXPORT_SYMBOL(of_find_node_by_phandle); | |
1287 | ||
e523f723 NL |
1288 | /** |
1289 | * of_find_next_cache_node - Find a node's subsidiary cache | |
1290 | * @np: node of type "cpu" or "cache" | |
1291 | * | |
1292 | * Returns a node pointer with refcount incremented, use | |
1293 | * of_node_put() on it when done. Caller should hold a reference | |
1294 | * to np. | |
1295 | */ | |
1296 | struct device_node *of_find_next_cache_node(struct device_node *np) | |
1297 | { | |
1298 | struct device_node *child; | |
1299 | const phandle *handle; | |
1300 | ||
1301 | handle = of_get_property(np, "l2-cache", NULL); | |
1302 | if (!handle) | |
1303 | handle = of_get_property(np, "next-level-cache", NULL); | |
1304 | ||
1305 | if (handle) | |
1306 | return of_find_node_by_phandle(*handle); | |
1307 | ||
1308 | /* OF on pmac has nodes instead of properties named "l2-cache" | |
1309 | * beneath CPU nodes. | |
1310 | */ | |
1311 | if (!strcmp(np->type, "cpu")) | |
1312 | for_each_child_of_node(np, child) | |
1313 | if (!strcmp(child->type, "cache")) | |
1314 | return child; | |
1315 | ||
1316 | return NULL; | |
1317 | } | |
1318 | ||
9b6b563c PM |
1319 | /** |
1320 | * of_find_all_nodes - Get next node in global list | |
1321 | * @prev: Previous node or NULL to start iteration | |
1322 | * of_node_put() will be called on it | |
1323 | * | |
1324 | * Returns a node pointer with refcount incremented, use | |
1325 | * of_node_put() on it when done. | |
1326 | */ | |
1327 | struct device_node *of_find_all_nodes(struct device_node *prev) | |
1328 | { | |
1329 | struct device_node *np; | |
1330 | ||
1331 | read_lock(&devtree_lock); | |
1332 | np = prev ? prev->allnext : allnodes; | |
1333 | for (; np != 0; np = np->allnext) | |
1334 | if (of_node_get(np)) | |
1335 | break; | |
b1374051 | 1336 | of_node_put(prev); |
9b6b563c PM |
1337 | read_unlock(&devtree_lock); |
1338 | return np; | |
1339 | } | |
1340 | EXPORT_SYMBOL(of_find_all_nodes); | |
1341 | ||
9b6b563c PM |
1342 | /** |
1343 | * of_node_get - Increment refcount of a node | |
1344 | * @node: Node to inc refcount, NULL is supported to | |
1345 | * simplify writing of callers | |
1346 | * | |
1347 | * Returns node. | |
1348 | */ | |
1349 | struct device_node *of_node_get(struct device_node *node) | |
1350 | { | |
1351 | if (node) | |
1352 | kref_get(&node->kref); | |
1353 | return node; | |
1354 | } | |
1355 | EXPORT_SYMBOL(of_node_get); | |
1356 | ||
1357 | static inline struct device_node * kref_to_device_node(struct kref *kref) | |
1358 | { | |
1359 | return container_of(kref, struct device_node, kref); | |
1360 | } | |
1361 | ||
1362 | /** | |
1363 | * of_node_release - release a dynamically allocated node | |
1364 | * @kref: kref element of the node to be released | |
1365 | * | |
1366 | * In of_node_put() this function is passed to kref_put() | |
1367 | * as the destructor. | |
1368 | */ | |
1369 | static void of_node_release(struct kref *kref) | |
1370 | { | |
1371 | struct device_node *node = kref_to_device_node(kref); | |
1372 | struct property *prop = node->properties; | |
1373 | ||
6a281856 ME |
1374 | /* We should never be releasing nodes that haven't been detached. */ |
1375 | if (!of_node_check_flag(node, OF_DETACHED)) { | |
1376 | printk("WARNING: Bad of_node_put() on %s\n", node->full_name); | |
1377 | dump_stack(); | |
1378 | kref_init(&node->kref); | |
1379 | return; | |
1380 | } | |
1381 | ||
d3b814bb | 1382 | if (!of_node_check_flag(node, OF_DYNAMIC)) |
9b6b563c | 1383 | return; |
6a281856 | 1384 | |
9b6b563c PM |
1385 | while (prop) { |
1386 | struct property *next = prop->next; | |
1387 | kfree(prop->name); | |
1388 | kfree(prop->value); | |
1389 | kfree(prop); | |
1390 | prop = next; | |
088186de DB |
1391 | |
1392 | if (!prop) { | |
1393 | prop = node->deadprops; | |
1394 | node->deadprops = NULL; | |
1395 | } | |
9b6b563c | 1396 | } |
9b6b563c PM |
1397 | kfree(node->full_name); |
1398 | kfree(node->data); | |
1399 | kfree(node); | |
1400 | } | |
1401 | ||
1402 | /** | |
1403 | * of_node_put - Decrement refcount of a node | |
1404 | * @node: Node to dec refcount, NULL is supported to | |
1405 | * simplify writing of callers | |
1406 | * | |
1407 | */ | |
1408 | void of_node_put(struct device_node *node) | |
1409 | { | |
1410 | if (node) | |
1411 | kref_put(&node->kref, of_node_release); | |
1412 | } | |
1413 | EXPORT_SYMBOL(of_node_put); | |
1414 | ||
1415 | /* | |
1416 | * Plug a device node into the tree and global list. | |
1417 | */ | |
1418 | void of_attach_node(struct device_node *np) | |
1419 | { | |
f4ac7b5e BH |
1420 | unsigned long flags; |
1421 | ||
1422 | write_lock_irqsave(&devtree_lock, flags); | |
9b6b563c PM |
1423 | np->sibling = np->parent->child; |
1424 | np->allnext = allnodes; | |
1425 | np->parent->child = np; | |
1426 | allnodes = np; | |
f4ac7b5e | 1427 | write_unlock_irqrestore(&devtree_lock, flags); |
9b6b563c PM |
1428 | } |
1429 | ||
1430 | /* | |
1431 | * "Unplug" a node from the device tree. The caller must hold | |
1432 | * a reference to the node. The memory associated with the node | |
1433 | * is not freed until its refcount goes to zero. | |
1434 | */ | |
34f329db | 1435 | void of_detach_node(struct device_node *np) |
9b6b563c PM |
1436 | { |
1437 | struct device_node *parent; | |
f4ac7b5e | 1438 | unsigned long flags; |
9b6b563c | 1439 | |
f4ac7b5e | 1440 | write_lock_irqsave(&devtree_lock, flags); |
9b6b563c PM |
1441 | |
1442 | parent = np->parent; | |
972d17c9 ME |
1443 | if (!parent) |
1444 | goto out_unlock; | |
9b6b563c PM |
1445 | |
1446 | if (allnodes == np) | |
1447 | allnodes = np->allnext; | |
1448 | else { | |
1449 | struct device_node *prev; | |
1450 | for (prev = allnodes; | |
1451 | prev->allnext != np; | |
1452 | prev = prev->allnext) | |
1453 | ; | |
1454 | prev->allnext = np->allnext; | |
1455 | } | |
1456 | ||
1457 | if (parent->child == np) | |
1458 | parent->child = np->sibling; | |
1459 | else { | |
1460 | struct device_node *prevsib; | |
1461 | for (prevsib = np->parent->child; | |
1462 | prevsib->sibling != np; | |
1463 | prevsib = prevsib->sibling) | |
1464 | ; | |
1465 | prevsib->sibling = np->sibling; | |
1466 | } | |
1467 | ||
6a281856 ME |
1468 | of_node_set_flag(np, OF_DETACHED); |
1469 | ||
972d17c9 | 1470 | out_unlock: |
f4ac7b5e | 1471 | write_unlock_irqrestore(&devtree_lock, flags); |
9b6b563c PM |
1472 | } |
1473 | ||
1474 | #ifdef CONFIG_PPC_PSERIES | |
1475 | /* | |
1476 | * Fix up the uninitialized fields in a new device node: | |
0ebfff14 | 1477 | * name, type and pci-specific fields |
9b6b563c PM |
1478 | */ |
1479 | ||
cc5d0189 | 1480 | static int of_finish_dynamic_node(struct device_node *node) |
9b6b563c PM |
1481 | { |
1482 | struct device_node *parent = of_get_parent(node); | |
1483 | int err = 0; | |
a7f67bdf | 1484 | const phandle *ibm_phandle; |
9b6b563c | 1485 | |
0e56efc7 SR |
1486 | node->name = of_get_property(node, "name", NULL); |
1487 | node->type = of_get_property(node, "device_type", NULL); | |
9b6b563c | 1488 | |
847f5976 BH |
1489 | if (!node->name) |
1490 | node->name = "<NULL>"; | |
1491 | if (!node->type) | |
1492 | node->type = "<NULL>"; | |
1493 | ||
9b6b563c PM |
1494 | if (!parent) { |
1495 | err = -ENODEV; | |
1496 | goto out; | |
1497 | } | |
1498 | ||
1499 | /* We don't support that function on PowerMac, at least | |
1500 | * not yet | |
1501 | */ | |
e8222502 | 1502 | if (machine_is(powermac)) |
9b6b563c PM |
1503 | return -ENODEV; |
1504 | ||
1505 | /* fix up new node's linux_phandle field */ | |
0e56efc7 | 1506 | if ((ibm_phandle = of_get_property(node, "ibm,phandle", NULL))) |
9b6b563c PM |
1507 | node->linux_phandle = *ibm_phandle; |
1508 | ||
1509 | out: | |
1510 | of_node_put(parent); | |
1511 | return err; | |
1512 | } | |
1513 | ||
1514 | static int prom_reconfig_notifier(struct notifier_block *nb, | |
1515 | unsigned long action, void *node) | |
1516 | { | |
1517 | int err; | |
1518 | ||
1519 | switch (action) { | |
1520 | case PSERIES_RECONFIG_ADD: | |
cc5d0189 | 1521 | err = of_finish_dynamic_node(node); |
9b6b563c PM |
1522 | if (err < 0) { |
1523 | printk(KERN_ERR "finish_node returned %d\n", err); | |
1524 | err = NOTIFY_BAD; | |
1525 | } | |
1526 | break; | |
1527 | default: | |
1528 | err = NOTIFY_DONE; | |
1529 | break; | |
1530 | } | |
1531 | return err; | |
1532 | } | |
1533 | ||
1534 | static struct notifier_block prom_reconfig_nb = { | |
1535 | .notifier_call = prom_reconfig_notifier, | |
1536 | .priority = 10, /* This one needs to run first */ | |
1537 | }; | |
1538 | ||
1539 | static int __init prom_reconfig_setup(void) | |
1540 | { | |
1541 | return pSeries_reconfig_notifier_register(&prom_reconfig_nb); | |
1542 | } | |
1543 | __initcall(prom_reconfig_setup); | |
1544 | #endif | |
1545 | ||
9b6b563c PM |
1546 | /* |
1547 | * Add a property to a node | |
1548 | */ | |
183d0202 | 1549 | int prom_add_property(struct device_node* np, struct property* prop) |
9b6b563c | 1550 | { |
183d0202 | 1551 | struct property **next; |
f4ac7b5e | 1552 | unsigned long flags; |
9b6b563c PM |
1553 | |
1554 | prop->next = NULL; | |
f4ac7b5e | 1555 | write_lock_irqsave(&devtree_lock, flags); |
183d0202 BH |
1556 | next = &np->properties; |
1557 | while (*next) { | |
1558 | if (strcmp(prop->name, (*next)->name) == 0) { | |
1559 | /* duplicate ! don't insert it */ | |
f4ac7b5e | 1560 | write_unlock_irqrestore(&devtree_lock, flags); |
183d0202 BH |
1561 | return -1; |
1562 | } | |
9b6b563c | 1563 | next = &(*next)->next; |
183d0202 | 1564 | } |
9b6b563c | 1565 | *next = prop; |
f4ac7b5e | 1566 | write_unlock_irqrestore(&devtree_lock, flags); |
183d0202 | 1567 | |
799d6046 | 1568 | #ifdef CONFIG_PROC_DEVICETREE |
183d0202 BH |
1569 | /* try to add to proc as well if it was initialized */ |
1570 | if (np->pde) | |
1571 | proc_device_tree_add_prop(np->pde, prop); | |
799d6046 | 1572 | #endif /* CONFIG_PROC_DEVICETREE */ |
183d0202 BH |
1573 | |
1574 | return 0; | |
9b6b563c PM |
1575 | } |
1576 | ||
088186de DB |
1577 | /* |
1578 | * Remove a property from a node. Note that we don't actually | |
1579 | * remove it, since we have given out who-knows-how-many pointers | |
1580 | * to the data using get-property. Instead we just move the property | |
1581 | * to the "dead properties" list, so it won't be found any more. | |
1582 | */ | |
1583 | int prom_remove_property(struct device_node *np, struct property *prop) | |
1584 | { | |
1585 | struct property **next; | |
f4ac7b5e | 1586 | unsigned long flags; |
088186de DB |
1587 | int found = 0; |
1588 | ||
f4ac7b5e | 1589 | write_lock_irqsave(&devtree_lock, flags); |
088186de DB |
1590 | next = &np->properties; |
1591 | while (*next) { | |
1592 | if (*next == prop) { | |
1593 | /* found the node */ | |
1594 | *next = prop->next; | |
1595 | prop->next = np->deadprops; | |
1596 | np->deadprops = prop; | |
1597 | found = 1; | |
1598 | break; | |
1599 | } | |
1600 | next = &(*next)->next; | |
1601 | } | |
f4ac7b5e | 1602 | write_unlock_irqrestore(&devtree_lock, flags); |
088186de DB |
1603 | |
1604 | if (!found) | |
1605 | return -ENODEV; | |
1606 | ||
1607 | #ifdef CONFIG_PROC_DEVICETREE | |
1608 | /* try to remove the proc node as well */ | |
1609 | if (np->pde) | |
1610 | proc_device_tree_remove_prop(np->pde, prop); | |
1611 | #endif /* CONFIG_PROC_DEVICETREE */ | |
1612 | ||
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | /* | |
1617 | * Update a property in a node. Note that we don't actually | |
1618 | * remove it, since we have given out who-knows-how-many pointers | |
1619 | * to the data using get-property. Instead we just move the property | |
1620 | * to the "dead properties" list, and add the new property to the | |
1621 | * property list | |
1622 | */ | |
1623 | int prom_update_property(struct device_node *np, | |
1624 | struct property *newprop, | |
1625 | struct property *oldprop) | |
1626 | { | |
1627 | struct property **next; | |
f4ac7b5e | 1628 | unsigned long flags; |
088186de DB |
1629 | int found = 0; |
1630 | ||
f4ac7b5e | 1631 | write_lock_irqsave(&devtree_lock, flags); |
088186de DB |
1632 | next = &np->properties; |
1633 | while (*next) { | |
1634 | if (*next == oldprop) { | |
1635 | /* found the node */ | |
1636 | newprop->next = oldprop->next; | |
1637 | *next = newprop; | |
1638 | oldprop->next = np->deadprops; | |
1639 | np->deadprops = oldprop; | |
1640 | found = 1; | |
1641 | break; | |
1642 | } | |
1643 | next = &(*next)->next; | |
1644 | } | |
f4ac7b5e | 1645 | write_unlock_irqrestore(&devtree_lock, flags); |
088186de DB |
1646 | |
1647 | if (!found) | |
1648 | return -ENODEV; | |
9b6b563c | 1649 | |
088186de DB |
1650 | #ifdef CONFIG_PROC_DEVICETREE |
1651 | /* try to add to proc as well if it was initialized */ | |
1652 | if (np->pde) | |
1653 | proc_device_tree_update_prop(np->pde, newprop, oldprop); | |
1654 | #endif /* CONFIG_PROC_DEVICETREE */ | |
1655 | ||
1656 | return 0; | |
1657 | } | |
b68239ee | 1658 | |
acf7d768 BH |
1659 | |
1660 | /* Find the device node for a given logical cpu number, also returns the cpu | |
1661 | * local thread number (index in ibm,interrupt-server#s) if relevant and | |
1662 | * asked for (non NULL) | |
1663 | */ | |
1664 | struct device_node *of_get_cpu_node(int cpu, unsigned int *thread) | |
1665 | { | |
1666 | int hardid; | |
1667 | struct device_node *np; | |
1668 | ||
1669 | hardid = get_hard_smp_processor_id(cpu); | |
1670 | ||
1671 | for_each_node_by_type(np, "cpu") { | |
a7f67bdf | 1672 | const u32 *intserv; |
acf7d768 BH |
1673 | unsigned int plen, t; |
1674 | ||
1675 | /* Check for ibm,ppc-interrupt-server#s. If it doesn't exist | |
1676 | * fallback to "reg" property and assume no threads | |
1677 | */ | |
0e56efc7 | 1678 | intserv = of_get_property(np, "ibm,ppc-interrupt-server#s", |
a7f67bdf | 1679 | &plen); |
acf7d768 | 1680 | if (intserv == NULL) { |
0e56efc7 | 1681 | const u32 *reg = of_get_property(np, "reg", NULL); |
acf7d768 BH |
1682 | if (reg == NULL) |
1683 | continue; | |
1684 | if (*reg == hardid) { | |
1685 | if (thread) | |
1686 | *thread = 0; | |
1687 | return np; | |
1688 | } | |
1689 | } else { | |
1690 | plen /= sizeof(u32); | |
1691 | for (t = 0; t < plen; t++) { | |
1692 | if (hardid == intserv[t]) { | |
1693 | if (thread) | |
1694 | *thread = t; | |
1695 | return np; | |
1696 | } | |
1697 | } | |
1698 | } | |
1699 | } | |
1700 | return NULL; | |
1701 | } | |
36ca4ba4 | 1702 | EXPORT_SYMBOL(of_get_cpu_node); |
7a4571ae | 1703 | |
94a3807c | 1704 | #if defined(CONFIG_DEBUG_FS) && defined(DEBUG) |
7a4571ae ME |
1705 | static struct debugfs_blob_wrapper flat_dt_blob; |
1706 | ||
1707 | static int __init export_flat_device_tree(void) | |
1708 | { | |
1709 | struct dentry *d; | |
1710 | ||
7a4571ae ME |
1711 | flat_dt_blob.data = initial_boot_params; |
1712 | flat_dt_blob.size = initial_boot_params->totalsize; | |
1713 | ||
1714 | d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR, | |
94a3807c | 1715 | powerpc_debugfs_root, &flat_dt_blob); |
7a4571ae ME |
1716 | if (!d) |
1717 | return 1; | |
1718 | ||
1719 | return 0; | |
1720 | } | |
1721 | __initcall(export_flat_device_tree); | |
1722 | #endif |