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[mirror_ubuntu-artful-kernel.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 * __init 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_ops = {
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 static const u64 *parent_cfg_handle(struct mdesc_handle *hp, u64 node)
235 {
236 const u64 *id;
237 u64 a;
238
239 id = NULL;
240 mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) {
241 u64 target;
242
243 target = mdesc_arc_target(hp, a);
244 id = mdesc_get_property(hp, target,
245 "cfg-handle", NULL);
246 if (id)
247 break;
248 }
249
250 return id;
251 }
252
253 /* Run 'func' on nodes which are in A but not in B. */
254 static void invoke_on_missing(const char *name,
255 struct mdesc_handle *a,
256 struct mdesc_handle *b,
257 void (*func)(struct mdesc_handle *, u64))
258 {
259 u64 node;
260
261 mdesc_for_each_node_by_name(a, node, name) {
262 int found = 0, is_vdc_port = 0;
263 const char *name_prop;
264 const u64 *id;
265 u64 fnode;
266
267 name_prop = mdesc_get_property(a, node, "name", NULL);
268 if (name_prop && !strcmp(name_prop, "vdc-port")) {
269 is_vdc_port = 1;
270 id = parent_cfg_handle(a, node);
271 } else
272 id = mdesc_get_property(a, node, "id", NULL);
273
274 if (!id) {
275 printk(KERN_ERR "MD: Cannot find ID for %s node.\n",
276 (name_prop ? name_prop : name));
277 continue;
278 }
279
280 mdesc_for_each_node_by_name(b, fnode, name) {
281 const u64 *fid;
282
283 if (is_vdc_port) {
284 name_prop = mdesc_get_property(b, fnode,
285 "name", NULL);
286 if (!name_prop ||
287 strcmp(name_prop, "vdc-port"))
288 continue;
289 fid = parent_cfg_handle(b, fnode);
290 if (!fid) {
291 printk(KERN_ERR "MD: Cannot find ID "
292 "for vdc-port node.\n");
293 continue;
294 }
295 } else
296 fid = mdesc_get_property(b, fnode,
297 "id", NULL);
298
299 if (*id == *fid) {
300 found = 1;
301 break;
302 }
303 }
304 if (!found)
305 func(a, node);
306 }
307 }
308
309 static void notify_one(struct mdesc_notifier_client *p,
310 struct mdesc_handle *old_hp,
311 struct mdesc_handle *new_hp)
312 {
313 invoke_on_missing(p->node_name, old_hp, new_hp, p->remove);
314 invoke_on_missing(p->node_name, new_hp, old_hp, p->add);
315 }
316
317 static void mdesc_notify_clients(struct mdesc_handle *old_hp,
318 struct mdesc_handle *new_hp)
319 {
320 struct mdesc_notifier_client *p = client_list;
321
322 while (p) {
323 notify_one(p, old_hp, new_hp);
324 p = p->next;
325 }
326 }
327
328 void mdesc_update(void)
329 {
330 unsigned long len, real_len, status;
331 struct mdesc_handle *hp, *orig_hp;
332 unsigned long flags;
333
334 mutex_lock(&mdesc_mutex);
335
336 (void) sun4v_mach_desc(0UL, 0UL, &len);
337
338 hp = mdesc_alloc(len, &kmalloc_mdesc_memops);
339 if (!hp) {
340 printk(KERN_ERR "MD: mdesc alloc fails\n");
341 goto out;
342 }
343
344 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
345 if (status != HV_EOK || real_len > len) {
346 printk(KERN_ERR "MD: mdesc reread fails with %lu\n",
347 status);
348 atomic_dec(&hp->refcnt);
349 mdesc_free(hp);
350 goto out;
351 }
352
353 spin_lock_irqsave(&mdesc_lock, flags);
354 orig_hp = cur_mdesc;
355 cur_mdesc = hp;
356 spin_unlock_irqrestore(&mdesc_lock, flags);
357
358 mdesc_notify_clients(orig_hp, hp);
359
360 spin_lock_irqsave(&mdesc_lock, flags);
361 if (atomic_dec_and_test(&orig_hp->refcnt))
362 mdesc_free(orig_hp);
363 else
364 list_add(&orig_hp->list, &mdesc_zombie_list);
365 spin_unlock_irqrestore(&mdesc_lock, flags);
366
367 out:
368 mutex_unlock(&mdesc_mutex);
369 }
370
371 static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)
372 {
373 return (struct mdesc_elem *) (mdesc + 1);
374 }
375
376 static void *name_block(struct mdesc_hdr *mdesc)
377 {
378 return ((void *) node_block(mdesc)) + mdesc->node_sz;
379 }
380
381 static void *data_block(struct mdesc_hdr *mdesc)
382 {
383 return ((void *) name_block(mdesc)) + mdesc->name_sz;
384 }
385
386 u64 mdesc_node_by_name(struct mdesc_handle *hp,
387 u64 from_node, const char *name)
388 {
389 struct mdesc_elem *ep = node_block(&hp->mdesc);
390 const char *names = name_block(&hp->mdesc);
391 u64 last_node = hp->mdesc.node_sz / 16;
392 u64 ret;
393
394 if (from_node == MDESC_NODE_NULL) {
395 ret = from_node = 0;
396 } else if (from_node >= last_node) {
397 return MDESC_NODE_NULL;
398 } else {
399 ret = ep[from_node].d.val;
400 }
401
402 while (ret < last_node) {
403 if (ep[ret].tag != MD_NODE)
404 return MDESC_NODE_NULL;
405 if (!strcmp(names + ep[ret].name_offset, name))
406 break;
407 ret = ep[ret].d.val;
408 }
409 if (ret >= last_node)
410 ret = MDESC_NODE_NULL;
411 return ret;
412 }
413 EXPORT_SYMBOL(mdesc_node_by_name);
414
415 const void *mdesc_get_property(struct mdesc_handle *hp, u64 node,
416 const char *name, int *lenp)
417 {
418 const char *names = name_block(&hp->mdesc);
419 u64 last_node = hp->mdesc.node_sz / 16;
420 void *data = data_block(&hp->mdesc);
421 struct mdesc_elem *ep;
422
423 if (node == MDESC_NODE_NULL || node >= last_node)
424 return NULL;
425
426 ep = node_block(&hp->mdesc) + node;
427 ep++;
428 for (; ep->tag != MD_NODE_END; ep++) {
429 void *val = NULL;
430 int len = 0;
431
432 switch (ep->tag) {
433 case MD_PROP_VAL:
434 val = &ep->d.val;
435 len = 8;
436 break;
437
438 case MD_PROP_STR:
439 case MD_PROP_DATA:
440 val = data + ep->d.data.data_offset;
441 len = ep->d.data.data_len;
442 break;
443
444 default:
445 break;
446 }
447 if (!val)
448 continue;
449
450 if (!strcmp(names + ep->name_offset, name)) {
451 if (lenp)
452 *lenp = len;
453 return val;
454 }
455 }
456
457 return NULL;
458 }
459 EXPORT_SYMBOL(mdesc_get_property);
460
461 u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type)
462 {
463 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
464 const char *names = name_block(&hp->mdesc);
465 u64 last_node = hp->mdesc.node_sz / 16;
466
467 if (from == MDESC_NODE_NULL || from >= last_node)
468 return MDESC_NODE_NULL;
469
470 ep = base + from;
471
472 ep++;
473 for (; ep->tag != MD_NODE_END; ep++) {
474 if (ep->tag != MD_PROP_ARC)
475 continue;
476
477 if (strcmp(names + ep->name_offset, arc_type))
478 continue;
479
480 return ep - base;
481 }
482
483 return MDESC_NODE_NULL;
484 }
485 EXPORT_SYMBOL(mdesc_next_arc);
486
487 u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc)
488 {
489 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
490
491 ep = base + arc;
492
493 return ep->d.val;
494 }
495 EXPORT_SYMBOL(mdesc_arc_target);
496
497 const char *mdesc_node_name(struct mdesc_handle *hp, u64 node)
498 {
499 struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
500 const char *names = name_block(&hp->mdesc);
501 u64 last_node = hp->mdesc.node_sz / 16;
502
503 if (node == MDESC_NODE_NULL || node >= last_node)
504 return NULL;
505
506 ep = base + node;
507 if (ep->tag != MD_NODE)
508 return NULL;
509
510 return names + ep->name_offset;
511 }
512 EXPORT_SYMBOL(mdesc_node_name);
513
514 static void __init report_platform_properties(void)
515 {
516 struct mdesc_handle *hp = mdesc_grab();
517 u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform");
518 const char *s;
519 const u64 *v;
520
521 if (pn == MDESC_NODE_NULL) {
522 prom_printf("No platform node in machine-description.\n");
523 prom_halt();
524 }
525
526 s = mdesc_get_property(hp, pn, "banner-name", NULL);
527 printk("PLATFORM: banner-name [%s]\n", s);
528 s = mdesc_get_property(hp, pn, "name", NULL);
529 printk("PLATFORM: name [%s]\n", s);
530
531 v = mdesc_get_property(hp, pn, "hostid", NULL);
532 if (v)
533 printk("PLATFORM: hostid [%08lx]\n", *v);
534 v = mdesc_get_property(hp, pn, "serial#", NULL);
535 if (v)
536 printk("PLATFORM: serial# [%08lx]\n", *v);
537 v = mdesc_get_property(hp, pn, "stick-frequency", NULL);
538 printk("PLATFORM: stick-frequency [%08lx]\n", *v);
539 v = mdesc_get_property(hp, pn, "mac-address", NULL);
540 if (v)
541 printk("PLATFORM: mac-address [%lx]\n", *v);
542 v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL);
543 if (v)
544 printk("PLATFORM: watchdog-resolution [%lu ms]\n", *v);
545 v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL);
546 if (v)
547 printk("PLATFORM: watchdog-max-timeout [%lu ms]\n", *v);
548 v = mdesc_get_property(hp, pn, "max-cpus", NULL);
549 if (v)
550 printk("PLATFORM: max-cpus [%lu]\n", *v);
551
552 #ifdef CONFIG_SMP
553 {
554 int max_cpu, i;
555
556 if (v) {
557 max_cpu = *v;
558 if (max_cpu > NR_CPUS)
559 max_cpu = NR_CPUS;
560 } else {
561 max_cpu = NR_CPUS;
562 }
563 for (i = 0; i < max_cpu; i++)
564 cpu_set(i, cpu_possible_map);
565 }
566 #endif
567
568 mdesc_release(hp);
569 }
570
571 static void __devinit fill_in_one_cache(cpuinfo_sparc *c,
572 struct mdesc_handle *hp,
573 u64 mp)
574 {
575 const u64 *level = mdesc_get_property(hp, mp, "level", NULL);
576 const u64 *size = mdesc_get_property(hp, mp, "size", NULL);
577 const u64 *line_size = mdesc_get_property(hp, mp, "line-size", NULL);
578 const char *type;
579 int type_len;
580
581 type = mdesc_get_property(hp, mp, "type", &type_len);
582
583 switch (*level) {
584 case 1:
585 if (of_find_in_proplist(type, "instn", type_len)) {
586 c->icache_size = *size;
587 c->icache_line_size = *line_size;
588 } else if (of_find_in_proplist(type, "data", type_len)) {
589 c->dcache_size = *size;
590 c->dcache_line_size = *line_size;
591 }
592 break;
593
594 case 2:
595 c->ecache_size = *size;
596 c->ecache_line_size = *line_size;
597 break;
598
599 default:
600 break;
601 }
602
603 if (*level == 1) {
604 u64 a;
605
606 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
607 u64 target = mdesc_arc_target(hp, a);
608 const char *name = mdesc_node_name(hp, target);
609
610 if (!strcmp(name, "cache"))
611 fill_in_one_cache(c, hp, target);
612 }
613 }
614 }
615
616 static void __devinit mark_core_ids(struct mdesc_handle *hp, u64 mp,
617 int core_id)
618 {
619 u64 a;
620
621 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
622 u64 t = mdesc_arc_target(hp, a);
623 const char *name;
624 const u64 *id;
625
626 name = mdesc_node_name(hp, t);
627 if (!strcmp(name, "cpu")) {
628 id = mdesc_get_property(hp, t, "id", NULL);
629 if (*id < NR_CPUS)
630 cpu_data(*id).core_id = core_id;
631 } else {
632 u64 j;
633
634 mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_BACK) {
635 u64 n = mdesc_arc_target(hp, j);
636 const char *n_name;
637
638 n_name = mdesc_node_name(hp, n);
639 if (strcmp(n_name, "cpu"))
640 continue;
641
642 id = mdesc_get_property(hp, n, "id", NULL);
643 if (*id < NR_CPUS)
644 cpu_data(*id).core_id = core_id;
645 }
646 }
647 }
648 }
649
650 static void __devinit set_core_ids(struct mdesc_handle *hp)
651 {
652 int idx;
653 u64 mp;
654
655 idx = 1;
656 mdesc_for_each_node_by_name(hp, mp, "cache") {
657 const u64 *level;
658 const char *type;
659 int len;
660
661 level = mdesc_get_property(hp, mp, "level", NULL);
662 if (*level != 1)
663 continue;
664
665 type = mdesc_get_property(hp, mp, "type", &len);
666 if (!of_find_in_proplist(type, "instn", len))
667 continue;
668
669 mark_core_ids(hp, mp, idx);
670
671 idx++;
672 }
673 }
674
675 static void __devinit mark_proc_ids(struct mdesc_handle *hp, u64 mp,
676 int proc_id)
677 {
678 u64 a;
679
680 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
681 u64 t = mdesc_arc_target(hp, a);
682 const char *name;
683 const u64 *id;
684
685 name = mdesc_node_name(hp, t);
686 if (strcmp(name, "cpu"))
687 continue;
688
689 id = mdesc_get_property(hp, t, "id", NULL);
690 if (*id < NR_CPUS)
691 cpu_data(*id).proc_id = proc_id;
692 }
693 }
694
695 static void __devinit __set_proc_ids(struct mdesc_handle *hp,
696 const char *exec_unit_name)
697 {
698 int idx;
699 u64 mp;
700
701 idx = 0;
702 mdesc_for_each_node_by_name(hp, mp, exec_unit_name) {
703 const char *type;
704 int len;
705
706 type = mdesc_get_property(hp, mp, "type", &len);
707 if (!of_find_in_proplist(type, "int", len) &&
708 !of_find_in_proplist(type, "integer", len))
709 continue;
710
711 mark_proc_ids(hp, mp, idx);
712
713 idx++;
714 }
715 }
716
717 static void __devinit set_proc_ids(struct mdesc_handle *hp)
718 {
719 __set_proc_ids(hp, "exec_unit");
720 __set_proc_ids(hp, "exec-unit");
721 }
722
723 static void __devinit get_one_mondo_bits(const u64 *p, unsigned int *mask,
724 unsigned char def)
725 {
726 u64 val;
727
728 if (!p)
729 goto use_default;
730 val = *p;
731
732 if (!val || val >= 64)
733 goto use_default;
734
735 *mask = ((1U << val) * 64U) - 1U;
736 return;
737
738 use_default:
739 *mask = ((1U << def) * 64U) - 1U;
740 }
741
742 static void __devinit get_mondo_data(struct mdesc_handle *hp, u64 mp,
743 struct trap_per_cpu *tb)
744 {
745 const u64 *val;
746
747 val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL);
748 get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7);
749
750 val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL);
751 get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7);
752
753 val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL);
754 get_one_mondo_bits(val, &tb->resum_qmask, 6);
755
756 val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL);
757 get_one_mondo_bits(val, &tb->nonresum_qmask, 2);
758 }
759
760 void __devinit mdesc_fill_in_cpu_data(cpumask_t mask)
761 {
762 struct mdesc_handle *hp = mdesc_grab();
763 u64 mp;
764
765 ncpus_probed = 0;
766 mdesc_for_each_node_by_name(hp, mp, "cpu") {
767 const u64 *id = mdesc_get_property(hp, mp, "id", NULL);
768 const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL);
769 struct trap_per_cpu *tb;
770 cpuinfo_sparc *c;
771 int cpuid;
772 u64 a;
773
774 ncpus_probed++;
775
776 cpuid = *id;
777
778 #ifdef CONFIG_SMP
779 if (cpuid >= NR_CPUS)
780 continue;
781 if (!cpu_isset(cpuid, mask))
782 continue;
783 #else
784 /* On uniprocessor we only want the values for the
785 * real physical cpu the kernel booted onto, however
786 * cpu_data() only has one entry at index 0.
787 */
788 if (cpuid != real_hard_smp_processor_id())
789 continue;
790 cpuid = 0;
791 #endif
792
793 c = &cpu_data(cpuid);
794 c->clock_tick = *cfreq;
795
796 tb = &trap_block[cpuid];
797 get_mondo_data(hp, mp, tb);
798
799 mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) {
800 u64 j, t = mdesc_arc_target(hp, a);
801 const char *t_name;
802
803 t_name = mdesc_node_name(hp, t);
804 if (!strcmp(t_name, "cache")) {
805 fill_in_one_cache(c, hp, t);
806 continue;
807 }
808
809 mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) {
810 u64 n = mdesc_arc_target(hp, j);
811 const char *n_name;
812
813 n_name = mdesc_node_name(hp, n);
814 if (!strcmp(n_name, "cache"))
815 fill_in_one_cache(c, hp, n);
816 }
817 }
818
819 #ifdef CONFIG_SMP
820 cpu_set(cpuid, cpu_present_map);
821 #endif
822
823 c->core_id = 0;
824 c->proc_id = -1;
825 }
826
827 #ifdef CONFIG_SMP
828 sparc64_multi_core = 1;
829 #endif
830
831 set_core_ids(hp);
832 set_proc_ids(hp);
833
834 smp_fill_in_sib_core_maps();
835
836 mdesc_release(hp);
837 }
838
839 void __init sun4v_mdesc_init(void)
840 {
841 struct mdesc_handle *hp;
842 unsigned long len, real_len, status;
843 cpumask_t mask;
844
845 (void) sun4v_mach_desc(0UL, 0UL, &len);
846
847 printk("MDESC: Size is %lu bytes.\n", len);
848
849 hp = mdesc_alloc(len, &bootmem_mdesc_ops);
850 if (hp == NULL) {
851 prom_printf("MDESC: alloc of %lu bytes failed.\n", len);
852 prom_halt();
853 }
854
855 status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
856 if (status != HV_EOK || real_len > len) {
857 prom_printf("sun4v_mach_desc fails, err(%lu), "
858 "len(%lu), real_len(%lu)\n",
859 status, len, real_len);
860 mdesc_free(hp);
861 prom_halt();
862 }
863
864 cur_mdesc = hp;
865
866 report_platform_properties();
867
868 cpus_setall(mask);
869 mdesc_fill_in_cpu_data(mask);
870 }
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