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Merge branch 'for-linus' of git://linux-nfs.org/~bfields/linux
[deliverable/linux.git] / arch / sparc64 / kernel / mdesc.c
1 /* mdesc.c: Sun4V machine description handling.
2 *
3 * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
4 */
5 #include <linux/kernel.h>
6 #include <linux/types.h>
7 #include <linux/bootmem.h>
8 #include <linux/log2.h>
9 #include <linux/list.h>
10 #include <linux/slab.h>
11 #include <linux/mm.h>
12
13 #include <asm/hypervisor.h>
14 #include <asm/mdesc.h>
15 #include <asm/prom.h>
16 #include <asm/oplib.h>
17 #include <asm/smp.h>
18
19 /* Unlike the OBP device tree, the machine description is a full-on
20 * DAG. An arbitrary number of ARCs are possible from one
21 * node to other nodes and thus we can't use the OBP device_node
22 * data structure to represent these nodes inside of the kernel.
23 *
24 * Actually, it isn't even a DAG, because there are back pointers
25 * which create cycles in the graph.
26 *
27 * mdesc_hdr and mdesc_elem describe the layout of the data structure
28 * we get from the Hypervisor.
29 */
30 struct mdesc_hdr {
31 u32 version; /* Transport version */
32 u32 node_sz; /* node block size */
33 u32 name_sz; /* name block size */
34 u32 data_sz; /* data block size */
35 } __attribute__((aligned(16)));
36
37 struct mdesc_elem {
38 u8 tag;
39 #define MD_LIST_END 0x00
40 #define MD_NODE 0x4e
41 #define MD_NODE_END 0x45
42 #define MD_NOOP 0x20
43 #define MD_PROP_ARC 0x61
44 #define MD_PROP_VAL 0x76
45 #define MD_PROP_STR 0x73
46 #define MD_PROP_DATA 0x64
47 u8 name_len;
48 u16 resv;
49 u32 name_offset;
50 union {
51 struct {
52 u32 data_len;
53 u32 data_offset;
54 } data;
55 u64 val;
56 } d;
57 };
58
59 struct mdesc_mem_ops {
60 struct mdesc_handle *(*alloc)(unsigned int mdesc_size);
61 void (*free)(struct mdesc_handle *handle);
62 };
63
64 struct mdesc_handle {
65 struct list_head list;
66 struct mdesc_mem_ops *mops;
67 void *self_base;
68 atomic_t refcnt;
69 unsigned int handle_size;
70 struct mdesc_hdr mdesc;
71 };
72
73 static void mdesc_handle_init(struct mdesc_handle *hp,
74 unsigned int handle_size,
75 void *base)
76 {
77 BUG_ON(((unsigned long)&hp->mdesc) & (16UL - 1));
78
79 memset(hp, 0, handle_size);
80 INIT_LIST_HEAD(&hp->list);
81 hp->self_base = base;
82 atomic_set(&hp->refcnt, 1);
83 hp->handle_size = handle_size;
84 }
85
86 static struct mdesc_handle *mdesc_bootmem_alloc(unsigned int mdesc_size)
87 {
88 struct mdesc_handle *hp;
89 unsigned int handle_size, alloc_size;
90
91 handle_size = (sizeof(struct mdesc_handle) -
92 sizeof(struct mdesc_hdr) +
93 mdesc_size);
94 alloc_size = PAGE_ALIGN(handle_size);
95
96 hp = __alloc_bootmem(alloc_size, PAGE_SIZE, 0UL);
97 if (hp)
98 mdesc_handle_init(hp, handle_size, hp);
99
100 return hp;
101 }
102
103 static void mdesc_bootmem_free(struct mdesc_handle *hp)
104 {
105 unsigned int alloc_size, handle_size = hp->handle_size;
106 unsigned long start, end;
107
108 BUG_ON(atomic_read(&hp->refcnt) != 0);
109 BUG_ON(!list_empty(&hp->list));
110
111 alloc_size = PAGE_ALIGN(handle_size);
112
113 start = (unsigned long) hp;
114 end = start + alloc_size;
115
116 while (start < end) {
117 struct page *p;
118
119 p = virt_to_page(start);
120 ClearPageReserved(p);
121 __free_page(p);
122 start += PAGE_SIZE;
123 }
124 }
125
126 static struct mdesc_mem_ops bootmem_mdesc_memops = {
127 .alloc = mdesc_bootmem_alloc,
128 .free = mdesc_bootmem_free,
129 };
130
131 static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size)
132 {
133 unsigned int handle_size;
134 void *base;
135
136 handle_size = (sizeof(struct mdesc_handle) -
137 sizeof(struct mdesc_hdr) +
138 mdesc_size);
139
140 base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_NOFAIL);
141 if (base) {
142 struct mdesc_handle *hp;
143 unsigned long addr;
144
145 addr = (unsigned long)base;
146 addr = (addr + 15UL) & ~15UL;
147 hp = (struct mdesc_handle *) addr;
148
149 mdesc_handle_init(hp, handle_size, base);
150 return hp;
151 }
152
153 return NULL;
154 }
155
156 static void mdesc_kfree(struct mdesc_handle *hp)
157 {
158 BUG_ON(atomic_read(&hp->refcnt) != 0);
159 BUG_ON(!list_empty(&hp->list));
160
161 kfree(hp->self_base);
162 }
163
164 static struct mdesc_mem_ops kmalloc_mdesc_memops = {
165 .alloc = mdesc_kmalloc,
166 .free = mdesc_kfree,
167 };
168
169 static struct mdesc_handle *mdesc_alloc(unsigned int mdesc_size,
170 struct mdesc_mem_ops *mops)
171 {
172 struct mdesc_handle *hp = mops->alloc(mdesc_size);
173
174 if (hp)
175 hp->mops = mops;
176
177 return hp;
178 }
179
180 static void mdesc_free(struct mdesc_handle *hp)
181 {
182 hp->mops->free(hp);
183 }
184
185 static struct mdesc_handle *cur_mdesc;
186 static LIST_HEAD(mdesc_zombie_list);
187 static DEFINE_SPINLOCK(mdesc_lock);
188
189 struct mdesc_handle *mdesc_grab(void)
190 {
191 struct mdesc_handle *hp;
192 unsigned long flags;
193
194 spin_lock_irqsave(&mdesc_lock, flags);
195 hp = cur_mdesc;
196 if (hp)
197 atomic_inc(&hp->refcnt);
198 spin_unlock_irqrestore(&mdesc_lock, flags);
199
200 return hp;
201 }
202 EXPORT_SYMBOL(mdesc_grab);
203
204 void mdesc_release(struct mdesc_handle *hp)
205 {
206 unsigned long flags;
207
208 spin_lock_irqsave(&mdesc_lock, flags);
209 if (atomic_dec_and_test(&hp->refcnt)) {
210 list_del_init(&hp->list);
211 hp->mops->free(hp);
212 }
213 spin_unlock_irqrestore(&mdesc_lock, flags);
214 }
215 EXPORT_SYMBOL(mdesc_release);
216
217 static DEFINE_MUTEX(mdesc_mutex);
218 static struct mdesc_notifier_client *client_list;
219
220 void mdesc_register_notifier(struct mdesc_notifier_client *client)
221 {
222 u64 node;
223
224 mutex_lock(&mdesc_mutex);
225 client->next = client_list;
226 client_list = client;
227
228 mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name)
229 client->add(cur_mdesc, node);
230
231 mutex_unlock(&mdesc_mutex);
232 }
233
234 /* Run 'func' on nodes which are in A but not in B. */
235 static void invoke_on_missing(const char *name,
236 struct mdesc_handle *a,
237 struct mdesc_handle *b,
238 void (*func)(struct mdesc_handle *, u64))
239 {
240 u64 node;
241
242 mdesc_for_each_node_by_name(a, node, name) {
243 const u64 *id = mdesc_get_property(a, node, "id", NULL);
244 int found = 0;
245 u64 fnode;
246
247 mdesc_for_each_node_by_name(b, fnode, name) {
248 const u64 *fid = mdesc_get_property(b, fnode,
249 "id", NULL);
250
251 if (*id == *fid) {
252 found = 1;
253 break;
254 }
255 }
256 if (!found)
257 func(a, node);
258 }
259 }
260
261 static void notify_one(struct mdesc_notifier_client *p,
262 struct mdesc_handle *old_hp,
263 struct mdesc_handle *new_hp)
264 {
265 invoke_on_missing(p->node_name, old_hp, new_hp, p->remove);
266 invoke_on_missing(p->node_name, new_hp, old_hp, p->add);
267 }
268
269 static void mdesc_notify_clients(struct mdesc_handle *old_hp,
270 struct mdesc_handle *new_hp)
271 {
272 struct mdesc_notifier_client *p = client_list;
273
274 while (p) {
275 notify_one(p, old_hp, new_hp);
276 p = p->next;
277 }
278 }
279
280 void mdesc_update(void)
281 {
282 unsigned long len, real_len, status;
283 struct mdesc_handle *hp, *orig_hp;
284 unsigned long flags;
285
286 mutex_lock(&mdesc_mutex);
287
288 (void) sun4v_mach_desc(0UL, 0UL, &len);
289
290 hp = mdesc_alloc(len, &kmalloc_mdesc_memops);
291 if (!hp) {
292 printk(KERN_ERR "MD: mdesc alloc fails\n");
293 goto out;
294 }
295
296 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
297 if (status != HV_EOK || real_len > len) {
298 printk(KERN_ERR "MD: mdesc reread fails with %lu\n",
299 status);
300 atomic_dec(&hp->refcnt);
301 mdesc_free(hp);
302 goto out;
303 }
304
305 spin_lock_irqsave(&mdesc_lock, flags);
306 orig_hp = cur_mdesc;
307 cur_mdesc = hp;
308 spin_unlock_irqrestore(&mdesc_lock, flags);
309
310 mdesc_notify_clients(orig_hp, hp);
311
312 spin_lock_irqsave(&mdesc_lock, flags);
313 if (atomic_dec_and_test(&orig_hp->refcnt))
314 mdesc_free(orig_hp);
315 else
316 list_add(&orig_hp->list, &mdesc_zombie_list);
317 spin_unlock_irqrestore(&mdesc_lock, flags);
318
319 out:
320 mutex_unlock(&mdesc_mutex);
321 }
322
323 static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)
324 {
325 return (struct mdesc_elem *) (mdesc + 1);
326 }
327
328 static void *name_block(struct mdesc_hdr *mdesc)
329 {
330 return ((void *) node_block(mdesc)) + mdesc->node_sz;
331 }
332
333 static void *data_block(struct mdesc_hdr *mdesc)
334 {
335 return ((void *) name_block(mdesc)) + mdesc->name_sz;
336 }
337
338 u64 mdesc_node_by_name(struct mdesc_handle *hp,
339 u64 from_node, const char *name)
340 {
341 struct mdesc_elem *ep = node_block(&hp->mdesc);
342 const char *names = name_block(&hp->mdesc);
343 u64 last_node = hp->mdesc.node_sz / 16;
344 u64 ret;
345
346 if (from_node == MDESC_NODE_NULL) {
347 ret = from_node = 0;
348 } else if (from_node >= last_node) {
349 return MDESC_NODE_NULL;
350 } else {
351 ret = ep[from_node].d.val;
352 }
353
354 while (ret < last_node) {
355 if (ep[ret].tag != MD_NODE)
356 return MDESC_NODE_NULL;
357 if (!strcmp(names + ep[ret].name_offset, name))
358 break;
359 ret = ep[ret].d.val;
360 }
361 if (ret >= last_node)
362 ret = MDESC_NODE_NULL;
363 return ret;
364 }
365 EXPORT_SYMBOL(mdesc_node_by_name);
366
367 const void *mdesc_get_property(struct mdesc_handle *hp, u64 node,
368 const char *name, int *lenp)
369 {
370 const char *names = name_block(&hp->mdesc);
371 u64 last_node = hp->mdesc.node_sz / 16;
372 void *data = data_block(&hp->mdesc);
373 struct mdesc_elem *ep;
374
375 if (node == MDESC_NODE_NULL || node >= last_node)
376 return NULL;
377
378 ep = node_block(&hp->mdesc) + node;
379 ep++;
380 for (; ep->tag != MD_NODE_END; ep++) {
381 void *val = NULL;
382 int len = 0;
383
384 switch (ep->tag) {
385 case MD_PROP_VAL:
386 val = &ep->d.val;
387 len = 8;
388 break;
389
390 case MD_PROP_STR:
391 case MD_PROP_DATA:
392 val = data + ep->d.data.data_offset;
393 len = ep->d.data.data_len;
394 break;
395
396 default:
397 break;
398 }
399 if (!val)
400 continue;
401
402 if (!strcmp(names + ep->name_offset, name)) {
403 if (lenp)
404 *lenp = len;
405 return val;
406 }
407 }
408
409 return NULL;
410 }
411 EXPORT_SYMBOL(mdesc_get_property);
412
413 u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type)
414 {
415 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
416 const char *names = name_block(&hp->mdesc);
417 u64 last_node = hp->mdesc.node_sz / 16;
418
419 if (from == MDESC_NODE_NULL || from >= last_node)
420 return MDESC_NODE_NULL;
421
422 ep = base + from;
423
424 ep++;
425 for (; ep->tag != MD_NODE_END; ep++) {
426 if (ep->tag != MD_PROP_ARC)
427 continue;
428
429 if (strcmp(names + ep->name_offset, arc_type))
430 continue;
431
432 return ep - base;
433 }
434
435 return MDESC_NODE_NULL;
436 }
437 EXPORT_SYMBOL(mdesc_next_arc);
438
439 u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc)
440 {
441 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
442
443 ep = base + arc;
444
445 return ep->d.val;
446 }
447 EXPORT_SYMBOL(mdesc_arc_target);
448
449 const char *mdesc_node_name(struct mdesc_handle *hp, u64 node)
450 {
451 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
452 const char *names = name_block(&hp->mdesc);
453 u64 last_node = hp->mdesc.node_sz / 16;
454
455 if (node == MDESC_NODE_NULL || node >= last_node)
456 return NULL;
457
458 ep = base + node;
459 if (ep->tag != MD_NODE)
460 return NULL;
461
462 return names + ep->name_offset;
463 }
464 EXPORT_SYMBOL(mdesc_node_name);
465
466 static void __init report_platform_properties(void)
467 {
468 struct mdesc_handle *hp = mdesc_grab();
469 u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform");
470 const char *s;
471 const u64 *v;
472
473 if (pn == MDESC_NODE_NULL) {
474 prom_printf("No platform node in machine-description.\n");
475 prom_halt();
476 }
477
478 s = mdesc_get_property(hp, pn, "banner-name", NULL);
479 printk("PLATFORM: banner-name [%s]\n", s);
480 s = mdesc_get_property(hp, pn, "name", NULL);
481 printk("PLATFORM: name [%s]\n", s);
482
483 v = mdesc_get_property(hp, pn, "hostid", NULL);
484 if (v)
485 printk("PLATFORM: hostid [%08lx]\n", *v);
486 v = mdesc_get_property(hp, pn, "serial#", NULL);
487 if (v)
488 printk("PLATFORM: serial# [%08lx]\n", *v);
489 v = mdesc_get_property(hp, pn, "stick-frequency", NULL);
490 printk("PLATFORM: stick-frequency [%08lx]\n", *v);
491 v = mdesc_get_property(hp, pn, "mac-address", NULL);
492 if (v)
493 printk("PLATFORM: mac-address [%lx]\n", *v);
494 v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL);
495 if (v)
496 printk("PLATFORM: watchdog-resolution [%lu ms]\n", *v);
497 v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL);
498 if (v)
499 printk("PLATFORM: watchdog-max-timeout [%lu ms]\n", *v);
500 v = mdesc_get_property(hp, pn, "max-cpus", NULL);
501 if (v)
502 printk("PLATFORM: max-cpus [%lu]\n", *v);
503
504 #ifdef CONFIG_SMP
505 {
506 int max_cpu, i;
507
508 if (v) {
509 max_cpu = *v;
510 if (max_cpu > NR_CPUS)
511 max_cpu = NR_CPUS;
512 } else {
513 max_cpu = NR_CPUS;
514 }
515 for (i = 0; i < max_cpu; i++)
516 cpu_set(i, cpu_possible_map);
517 }
518 #endif
519
520 mdesc_release(hp);
521 }
522
523 static int inline find_in_proplist(const char *list, const char *match, int len)
524 {
525 while (len > 0) {
526 int l;
527
528 if (!strcmp(list, match))
529 return 1;
530 l = strlen(list) + 1;
531 list += l;
532 len -= l;
533 }
534 return 0;
535 }
536
537 static void __devinit fill_in_one_cache(cpuinfo_sparc *c,
538 struct mdesc_handle *hp,
539 u64 mp)
540 {
541 const u64 *level = mdesc_get_property(hp, mp, "level", NULL);
542 const u64 *size = mdesc_get_property(hp, mp, "size", NULL);
543 const u64 *line_size = mdesc_get_property(hp, mp, "line-size", NULL);
544 const char *type;
545 int type_len;
546
547 type = mdesc_get_property(hp, mp, "type", &type_len);
548
549 switch (*level) {
550 case 1:
551 if (find_in_proplist(type, "instn", type_len)) {
552 c->icache_size = *size;
553 c->icache_line_size = *line_size;
554 } else if (find_in_proplist(type, "data", type_len)) {
555 c->dcache_size = *size;
556 c->dcache_line_size = *line_size;
557 }
558 break;
559
560 case 2:
561 c->ecache_size = *size;
562 c->ecache_line_size = *line_size;
563 break;
564
565 default:
566 break;
567 }
568
569 if (*level == 1) {
570 u64 a;
571
572 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
573 u64 target = mdesc_arc_target(hp, a);
574 const char *name = mdesc_node_name(hp, target);
575
576 if (!strcmp(name, "cache"))
577 fill_in_one_cache(c, hp, target);
578 }
579 }
580 }
581
582 static void __devinit mark_core_ids(struct mdesc_handle *hp, u64 mp,
583 int core_id)
584 {
585 u64 a;
586
587 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
588 u64 t = mdesc_arc_target(hp, a);
589 const char *name;
590 const u64 *id;
591
592 name = mdesc_node_name(hp, t);
593 if (!strcmp(name, "cpu")) {
594 id = mdesc_get_property(hp, t, "id", NULL);
595 if (*id < NR_CPUS)
596 cpu_data(*id).core_id = core_id;
597 } else {
598 u64 j;
599
600 mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_BACK) {
601 u64 n = mdesc_arc_target(hp, j);
602 const char *n_name;
603
604 n_name = mdesc_node_name(hp, n);
605 if (strcmp(n_name, "cpu"))
606 continue;
607
608 id = mdesc_get_property(hp, n, "id", NULL);
609 if (*id < NR_CPUS)
610 cpu_data(*id).core_id = core_id;
611 }
612 }
613 }
614 }
615
616 static void __devinit set_core_ids(struct mdesc_handle *hp)
617 {
618 int idx;
619 u64 mp;
620
621 idx = 1;
622 mdesc_for_each_node_by_name(hp, mp, "cache") {
623 const u64 *level;
624 const char *type;
625 int len;
626
627 level = mdesc_get_property(hp, mp, "level", NULL);
628 if (*level != 1)
629 continue;
630
631 type = mdesc_get_property(hp, mp, "type", &len);
632 if (!find_in_proplist(type, "instn", len))
633 continue;
634
635 mark_core_ids(hp, mp, idx);
636
637 idx++;
638 }
639 }
640
641 static void __devinit mark_proc_ids(struct mdesc_handle *hp, u64 mp,
642 int proc_id)
643 {
644 u64 a;
645
646 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
647 u64 t = mdesc_arc_target(hp, a);
648 const char *name;
649 const u64 *id;
650
651 name = mdesc_node_name(hp, t);
652 if (strcmp(name, "cpu"))
653 continue;
654
655 id = mdesc_get_property(hp, t, "id", NULL);
656 if (*id < NR_CPUS)
657 cpu_data(*id).proc_id = proc_id;
658 }
659 }
660
661 static void __devinit __set_proc_ids(struct mdesc_handle *hp,
662 const char *exec_unit_name)
663 {
664 int idx;
665 u64 mp;
666
667 idx = 0;
668 mdesc_for_each_node_by_name(hp, mp, exec_unit_name) {
669 const char *type;
670 int len;
671
672 type = mdesc_get_property(hp, mp, "type", &len);
673 if (!find_in_proplist(type, "int", len) &&
674 !find_in_proplist(type, "integer", len))
675 continue;
676
677 mark_proc_ids(hp, mp, idx);
678
679 idx++;
680 }
681 }
682
683 static void __devinit set_proc_ids(struct mdesc_handle *hp)
684 {
685 __set_proc_ids(hp, "exec_unit");
686 __set_proc_ids(hp, "exec-unit");
687 }
688
689 static void __devinit get_one_mondo_bits(const u64 *p, unsigned int *mask,
690 unsigned char def)
691 {
692 u64 val;
693
694 if (!p)
695 goto use_default;
696 val = *p;
697
698 if (!val || val >= 64)
699 goto use_default;
700
701 *mask = ((1U << val) * 64U) - 1U;
702 return;
703
704 use_default:
705 *mask = ((1U << def) * 64U) - 1U;
706 }
707
708 static void __devinit get_mondo_data(struct mdesc_handle *hp, u64 mp,
709 struct trap_per_cpu *tb)
710 {
711 const u64 *val;
712
713 val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL);
714 get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7);
715
716 val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL);
717 get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7);
718
719 val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL);
720 get_one_mondo_bits(val, &tb->resum_qmask, 6);
721
722 val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL);
723 get_one_mondo_bits(val, &tb->nonresum_qmask, 2);
724 }
725
726 void __devinit mdesc_fill_in_cpu_data(cpumask_t mask)
727 {
728 struct mdesc_handle *hp = mdesc_grab();
729 u64 mp;
730
731 ncpus_probed = 0;
732 mdesc_for_each_node_by_name(hp, mp, "cpu") {
733 const u64 *id = mdesc_get_property(hp, mp, "id", NULL);
734 const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL);
735 struct trap_per_cpu *tb;
736 cpuinfo_sparc *c;
737 int cpuid;
738 u64 a;
739
740 ncpus_probed++;
741
742 cpuid = *id;
743
744 #ifdef CONFIG_SMP
745 if (cpuid >= NR_CPUS)
746 continue;
747 if (!cpu_isset(cpuid, mask))
748 continue;
749 #else
750 /* On uniprocessor we only want the values for the
751 * real physical cpu the kernel booted onto, however
752 * cpu_data() only has one entry at index 0.
753 */
754 if (cpuid != real_hard_smp_processor_id())
755 continue;
756 cpuid = 0;
757 #endif
758
759 c = &cpu_data(cpuid);
760 c->clock_tick = *cfreq;
761
762 tb = &trap_block[cpuid];
763 get_mondo_data(hp, mp, tb);
764
765 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
766 u64 j, t = mdesc_arc_target(hp, a);
767 const char *t_name;
768
769 t_name = mdesc_node_name(hp, t);
770 if (!strcmp(t_name, "cache")) {
771 fill_in_one_cache(c, hp, t);
772 continue;
773 }
774
775 mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) {
776 u64 n = mdesc_arc_target(hp, j);
777 const char *n_name;
778
779 n_name = mdesc_node_name(hp, n);
780 if (!strcmp(n_name, "cache"))
781 fill_in_one_cache(c, hp, n);
782 }
783 }
784
785 #ifdef CONFIG_SMP
786 cpu_set(cpuid, cpu_present_map);
787 #endif
788
789 c->core_id = 0;
790 c->proc_id = -1;
791 }
792
793 #ifdef CONFIG_SMP
794 sparc64_multi_core = 1;
795 #endif
796
797 set_core_ids(hp);
798 set_proc_ids(hp);
799
800 smp_fill_in_sib_core_maps();
801
802 mdesc_release(hp);
803 }
804
805 void __init sun4v_mdesc_init(void)
806 {
807 struct mdesc_handle *hp;
808 unsigned long len, real_len, status;
809 cpumask_t mask;
810
811 (void) sun4v_mach_desc(0UL, 0UL, &len);
812
813 printk("MDESC: Size is %lu bytes.\n", len);
814
815 hp = mdesc_alloc(len, &bootmem_mdesc_memops);
816 if (hp == NULL) {
817 prom_printf("MDESC: alloc of %lu bytes failed.\n", len);
818 prom_halt();
819 }
820
821 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
822 if (status != HV_EOK || real_len > len) {
823 prom_printf("sun4v_mach_desc fails, err(%lu), "
824 "len(%lu), real_len(%lu)\n",
825 status, len, real_len);
826 mdesc_free(hp);
827 prom_halt();
828 }
829
830 cur_mdesc = hp;
831
832 report_platform_properties();
833
834 cpus_setall(mask);
835 mdesc_fill_in_cpu_data(mask);
836 }
Linux kernel - Deliverables
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