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16#undef DEBUG
17
18#include <stdarg.h>
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>
31#include <linux/kexec.h>
32#include <linux/debugfs.h>
33#include <linux/irq.h>
34#include <linux/memblock.h>
35
36#include <asm/prom.h>
37#include <asm/rtas.h>
38#include <asm/page.h>
39#include <asm/processor.h>
40#include <asm/irq.h>
41#include <asm/io.h>
42#include <asm/kdump.h>
43#include <asm/smp.h>
44#include <asm/system.h>
45#include <asm/mmu.h>
46#include <asm/paca.h>
47#include <asm/pgtable.h>
48#include <asm/pci.h>
49#include <asm/iommu.h>
50#include <asm/btext.h>
51#include <asm/sections.h>
52#include <asm/machdep.h>
53#include <asm/pSeries_reconfig.h>
54#include <asm/pci-bridge.h>
55#include <asm/phyp_dump.h>
56#include <asm/kexec.h>
57#include <mm/mmu_decl.h>
58
59#ifdef DEBUG
60#define DBG(fmt...) printk(KERN_ERR fmt)
61#else
62#define DBG(fmt...)
63#endif
64
65#ifdef CONFIG_PPC64
66int __initdata iommu_is_off;
67int __initdata iommu_force_on;
68unsigned long tce_alloc_start, tce_alloc_end;
69u64 ppc64_rma_size;
70#endif
71static phys_addr_t first_memblock_size;
72static int __initdata boot_cpu_count;
73
74static int __init early_parse_mem(char *p)
75{
76 if (!p)
77 return 1;
78
79 memory_limit = PAGE_ALIGN(memparse(p, &p));
80 DBG("memory limit = 0x%llx\n", (unsigned long long)memory_limit);
81
82 return 0;
83}
84early_param("mem", early_parse_mem);
85
86
87
88
89
90static inline int overlaps_initrd(unsigned long start, unsigned long size)
91{
92#ifdef CONFIG_BLK_DEV_INITRD
93 if (!initrd_start)
94 return 0;
95
96 return (start + size) > _ALIGN_DOWN(initrd_start, PAGE_SIZE) &&
97 start <= _ALIGN_UP(initrd_end, PAGE_SIZE);
98#else
99 return 0;
100#endif
101}
102
103
104
105
106
107
108
109
110static void __init move_device_tree(void)
111{
112 unsigned long start, size;
113 void *p;
114
115 DBG("-> move_device_tree\n");
116
117 start = __pa(initial_boot_params);
118 size = be32_to_cpu(initial_boot_params->totalsize);
119
120 if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) ||
121 overlaps_crashkernel(start, size) ||
122 overlaps_initrd(start, size)) {
123 p = __va(memblock_alloc(size, PAGE_SIZE));
124 memcpy(p, initial_boot_params, size);
125 initial_boot_params = (struct boot_param_header *)p;
126 DBG("Moved device tree to 0x%p\n", p);
127 }
128
129 DBG("<- move_device_tree\n");
130}
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145static struct ibm_pa_feature {
146 unsigned long cpu_features;
147 unsigned long mmu_features;
148 unsigned int cpu_user_ftrs;
149 unsigned char pabyte;
150 unsigned char pabit;
151 unsigned char invert;
152} ibm_pa_features[] __initdata = {
153 {0, 0, PPC_FEATURE_HAS_MMU, 0, 0, 0},
154 {0, 0, PPC_FEATURE_HAS_FPU, 0, 1, 0},
155 {0, MMU_FTR_SLB, 0, 0, 2, 0},
156 {CPU_FTR_CTRL, 0, 0, 0, 3, 0},
157 {CPU_FTR_NOEXECUTE, 0, 0, 0, 6, 0},
158 {CPU_FTR_NODSISRALIGN, 0, 0, 1, 1, 1},
159 {0, MMU_FTR_CI_LARGE_PAGE, 0, 1, 2, 0},
160 {CPU_FTR_REAL_LE, PPC_FEATURE_TRUE_LE, 5, 0, 0},
161};
162
163static void __init scan_features(unsigned long node, unsigned char *ftrs,
164 unsigned long tablelen,
165 struct ibm_pa_feature *fp,
166 unsigned long ft_size)
167{
168 unsigned long i, len, bit;
169
170
171 for (;;) {
172 if (tablelen < 3)
173 return;
174 len = 2 + ftrs[0];
175 if (tablelen < len)
176 return;
177 if (ftrs[1] == 0)
178 break;
179 tablelen -= len;
180 ftrs += len;
181 }
182
183
184 for (i = 0; i < ft_size; ++i, ++fp) {
185 if (fp->pabyte >= ftrs[0])
186 continue;
187 bit = (ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1;
188 if (bit ^ fp->invert) {
189 cur_cpu_spec->cpu_features |= fp->cpu_features;
190 cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs;
191 cur_cpu_spec->mmu_features |= fp->mmu_features;
192 } else {
193 cur_cpu_spec->cpu_features &= ~fp->cpu_features;
194 cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs;
195 cur_cpu_spec->mmu_features &= ~fp->mmu_features;
196 }
197 }
198}
199
200static void __init check_cpu_pa_features(unsigned long node)
201{
202 unsigned char *pa_ftrs;
203 unsigned long tablelen;
204
205 pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen);
206 if (pa_ftrs == NULL)
207 return;
208
209 scan_features(node, pa_ftrs, tablelen,
210 ibm_pa_features, ARRAY_SIZE(ibm_pa_features));
211}
212
213#ifdef CONFIG_PPC_STD_MMU_64
214static void __init check_cpu_slb_size(unsigned long node)
215{
216 u32 *slb_size_ptr;
217
218 slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL);
219 if (slb_size_ptr != NULL) {
220 mmu_slb_size = *slb_size_ptr;
221 return;
222 }
223 slb_size_ptr = of_get_flat_dt_prop(node, "ibm,slb-size", NULL);
224 if (slb_size_ptr != NULL) {
225 mmu_slb_size = *slb_size_ptr;
226 }
227}
228#else
229#define check_cpu_slb_size(node) do { } while(0)
230#endif
231
232static struct feature_property {
233 const char *name;
234 u32 min_value;
235 unsigned long cpu_feature;
236 unsigned long cpu_user_ftr;
237} feature_properties[] __initdata = {
238#ifdef CONFIG_ALTIVEC
239 {"altivec", 0, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC},
240 {"ibm,vmx", 1, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC},
241#endif
242#ifdef CONFIG_VSX
243
244 {"ibm,vmx", 2, CPU_FTR_VSX, PPC_FEATURE_HAS_VSX},
245#endif
246#ifdef CONFIG_PPC64
247 {"ibm,dfp", 1, 0, PPC_FEATURE_HAS_DFP},
248 {"ibm,purr", 1, CPU_FTR_PURR, 0},
249 {"ibm,spurr", 1, CPU_FTR_SPURR, 0},
250#endif
251};
252
253#if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU)
254static inline void identical_pvr_fixup(unsigned long node)
255{
256 unsigned int pvr;
257 char *model = of_get_flat_dt_prop(node, "model", NULL);
258
259
260
261
262
263
264
265
266 if (model && strstr(model, "440EP")) {
267 pvr = cur_cpu_spec->pvr_value | 0x8;
268 identify_cpu(0, pvr);
269 DBG("Using logical pvr %x for %s\n", pvr, model);
270 }
271}
272#else
273#define identical_pvr_fixup(node) do { } while(0)
274#endif
275
276static void __init check_cpu_feature_properties(unsigned long node)
277{
278 unsigned long i;
279 struct feature_property *fp = feature_properties;
280 const u32 *prop;
281
282 for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) {
283 prop = of_get_flat_dt_prop(node, fp->name, NULL);
284 if (prop && *prop >= fp->min_value) {
285 cur_cpu_spec->cpu_features |= fp->cpu_feature;
286 cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr;
287 }
288 }
289}
290
291static int __init early_init_dt_scan_cpus(unsigned long node,
292 const char *uname, int depth,
293 void *data)
294{
295 char *type = of_get_flat_dt_prop(node, "device_type", NULL);
296 const u32 *prop;
297 const u32 *intserv;
298 int i, nthreads;
299 unsigned long len;
300 int found = -1;
301 int found_thread = 0;
302
303
304 if (type == NULL || strcmp(type, "cpu") != 0)
305 return 0;
306
307
308 intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len);
309 if (intserv) {
310 nthreads = len / sizeof(int);
311 } else {
312 intserv = of_get_flat_dt_prop(node, "reg", NULL);
313 nthreads = 1;
314 }
315
316
317
318
319
320 for (i = 0; i < nthreads; i++) {
321
322
323
324
325 if (initial_boot_params->version >= 2) {
326 if (intserv[i] == initial_boot_params->boot_cpuid_phys) {
327 found = boot_cpu_count;
328 found_thread = i;
329 }
330 } else {
331
332
333
334
335
336 if (of_get_flat_dt_prop(node,
337 "linux,boot-cpu", NULL) != NULL)
338 found = boot_cpu_count;
339 }
340#ifdef CONFIG_SMP
341
342 boot_cpu_count++;
343#endif
344 }
345
346 if (found >= 0) {
347 DBG("boot cpu: logical %d physical %d\n", found,
348 intserv[found_thread]);
349 boot_cpuid = found;
350 set_hard_smp_processor_id(found, intserv[found_thread]);
351
352
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365
366 prop = of_get_flat_dt_prop(node, "cpu-version", NULL);
367 if (prop && (*prop & 0xff000000) == 0x0f000000)
368 identify_cpu(0, *prop);
369
370 identical_pvr_fixup(node);
371 }
372
373 check_cpu_feature_properties(node);
374 check_cpu_pa_features(node);
375 check_cpu_slb_size(node);
376
377#ifdef CONFIG_PPC_PSERIES
378 if (nthreads > 1)
379 cur_cpu_spec->cpu_features |= CPU_FTR_SMT;
380 else
381 cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT;
382#endif
383
384 return 0;
385}
386
387int __init early_init_dt_scan_chosen_ppc(unsigned long node, const char *uname,
388 int depth, void *data)
389{
390 unsigned long *lprop;
391
392
393 if (early_init_dt_scan_chosen(node, uname, depth, data) == 0)
394 return 0;
395
396#ifdef CONFIG_PPC64
397
398 if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL)
399 iommu_is_off = 1;
400 if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL)
401 iommu_force_on = 1;
402#endif
403
404
405 lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL);
406 if (lprop)
407 memory_limit = *lprop;
408
409#ifdef CONFIG_PPC64
410 lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL);
411 if (lprop)
412 tce_alloc_start = *lprop;
413 lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL);
414 if (lprop)
415 tce_alloc_end = *lprop;
416#endif
417
418#ifdef CONFIG_KEXEC
419 lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL);
420 if (lprop)
421 crashk_res.start = *lprop;
422
423 lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL);
424 if (lprop)
425 crashk_res.end = crashk_res.start + *lprop - 1;
426#endif
427
428
429 return 1;
430}
431
432#ifdef CONFIG_PPC_PSERIES
433
434
435
436
437
438
439static int __init early_init_dt_scan_drconf_memory(unsigned long node)
440{
441 __be32 *dm, *ls, *usm;
442 unsigned long l, n, flags;
443 u64 base, size, memblock_size;
444 unsigned int is_kexec_kdump = 0, rngs;
445
446 ls = of_get_flat_dt_prop(node, "ibm,lmb-size", &l);
447 if (ls == NULL || l < dt_root_size_cells * sizeof(__be32))
448 return 0;
449 memblock_size = dt_mem_next_cell(dt_root_size_cells, &ls);
450
451 dm = of_get_flat_dt_prop(node, "ibm,dynamic-memory", &l);
452 if (dm == NULL || l < sizeof(__be32))
453 return 0;
454
455 n = *dm++;
456 if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(__be32))
457 return 0;
458
459
460 usm = of_get_flat_dt_prop(node, "linux,drconf-usable-memory",
461 &l);
462 if (usm != NULL)
463 is_kexec_kdump = 1;
464
465 for (; n != 0; --n) {
466 base = dt_mem_next_cell(dt_root_addr_cells, &dm);
467 flags = dm[3];
468
469 dm += 4;
470
471
472 if ((flags & 0x80) || !(flags & 0x8))
473 continue;
474 size = memblock_size;
475 rngs = 1;
476 if (is_kexec_kdump) {
477
478
479
480
481
482
483
484 rngs = dt_mem_next_cell(dt_root_size_cells, &usm);
485 if (!rngs)
486 continue;
487 }
488 do {
489 if (is_kexec_kdump) {
490 base = dt_mem_next_cell(dt_root_addr_cells,
491 &usm);
492 size = dt_mem_next_cell(dt_root_size_cells,
493 &usm);
494 }
495 if (iommu_is_off) {
496 if (base >= 0x80000000ul)
497 continue;
498 if ((base + size) > 0x80000000ul)
499 size = 0x80000000ul - base;
500 }
501 memblock_add(base, size);
502 } while (--rngs);
503 }
504 memblock_dump_all();
505 return 0;
506}
507#else
508#define early_init_dt_scan_drconf_memory(node) 0
509#endif
510
511static int __init early_init_dt_scan_memory_ppc(unsigned long node,
512 const char *uname,
513 int depth, void *data)
514{
515 if (depth == 1 &&
516 strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0)
517 return early_init_dt_scan_drconf_memory(node);
518
519 return early_init_dt_scan_memory(node, uname, depth, data);
520}
521
522void __init early_init_dt_add_memory_arch(u64 base, u64 size)
523{
524#ifdef CONFIG_PPC64
525 if (iommu_is_off) {
526 if (base >= 0x80000000ul)
527 return;
528 if ((base + size) > 0x80000000ul)
529 size = 0x80000000ul - base;
530 }
531#endif
532
533
534
535
536 if (base < memstart_addr) {
537 memstart_addr = base;
538 first_memblock_size = size;
539 }
540
541
542 memblock_add(base, size);
543}
544
545void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
546{
547 return __va(memblock_alloc(size, align));
548}
549
550#ifdef CONFIG_BLK_DEV_INITRD
551void __init early_init_dt_setup_initrd_arch(unsigned long start,
552 unsigned long end)
553{
554 initrd_start = (unsigned long)__va(start);
555 initrd_end = (unsigned long)__va(end);
556 initrd_below_start_ok = 1;
557}
558#endif
559
560static void __init early_reserve_mem(void)
561{
562 u64 base, size;
563 u64 *reserve_map;
564 unsigned long self_base;
565 unsigned long self_size;
566
567 reserve_map = (u64 *)(((unsigned long)initial_boot_params) +
568 initial_boot_params->off_mem_rsvmap);
569
570
571 self_base = __pa((unsigned long)initial_boot_params);
572 self_size = initial_boot_params->totalsize;
573 memblock_reserve(self_base, self_size);
574
575#ifdef CONFIG_BLK_DEV_INITRD
576
577 if (initrd_start && (initrd_end > initrd_start))
578 memblock_reserve(_ALIGN_DOWN(__pa(initrd_start), PAGE_SIZE),
579 _ALIGN_UP(initrd_end, PAGE_SIZE) -
580 _ALIGN_DOWN(initrd_start, PAGE_SIZE));
581#endif
582
583#ifdef CONFIG_PPC32
584
585
586
587
588 if (*reserve_map > 0xffffffffull) {
589 u32 base_32, size_32;
590 u32 *reserve_map_32 = (u32 *)reserve_map;
591
592 while (1) {
593 base_32 = *(reserve_map_32++);
594 size_32 = *(reserve_map_32++);
595 if (size_32 == 0)
596 break;
597
598 if (base_32 == self_base && size_32 == self_size)
599 continue;
600 DBG("reserving: %x -> %x\n", base_32, size_32);
601 memblock_reserve(base_32, size_32);
602 }
603 return;
604 }
605#endif
606 while (1) {
607 base = *(reserve_map++);
608 size = *(reserve_map++);
609 if (size == 0)
610 break;
611 DBG("reserving: %llx -> %llx\n", base, size);
612 memblock_reserve(base, size);
613 }
614}
615
616#ifdef CONFIG_PHYP_DUMP
617
618
619
620
621
622
623
624
625
626
627static inline unsigned long phyp_dump_calculate_reserve_size(void)
628{
629 unsigned long tmp;
630
631 if (phyp_dump_info->reserve_bootvar)
632 return phyp_dump_info->reserve_bootvar;
633
634
635 tmp = memblock_end_of_DRAM();
636 do_div(tmp, 20);
637
638
639 tmp = tmp & ~0x0FFFFFFFUL;
640
641 return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END);
642}
643
644
645
646
647
648
649
650
651
652
653
654static void __init phyp_dump_reserve_mem(void)
655{
656 unsigned long base, size;
657 unsigned long variable_reserve_size;
658
659 if (!phyp_dump_info->phyp_dump_configured) {
660 printk(KERN_ERR "Phyp-dump not supported on this hardware\n");
661 return;
662 }
663
664 if (!phyp_dump_info->phyp_dump_at_boot) {
665 printk(KERN_INFO "Phyp-dump disabled at boot time\n");
666 return;
667 }
668
669 variable_reserve_size = phyp_dump_calculate_reserve_size();
670
671 if (phyp_dump_info->phyp_dump_is_active) {
672
673 base = variable_reserve_size;
674 size = memblock_end_of_DRAM() - base;
675
676
677
678 memblock_reserve(base, size);
679
680 phyp_dump_info->init_reserve_start = base;
681 phyp_dump_info->init_reserve_size = size;
682 } else {
683 size = phyp_dump_info->cpu_state_size +
684 phyp_dump_info->hpte_region_size +
685 variable_reserve_size;
686 base = memblock_end_of_DRAM() - size;
687 memblock_reserve(base, size);
688 phyp_dump_info->init_reserve_start = base;
689 phyp_dump_info->init_reserve_size = size;
690 }
691}
692#else
693static inline void __init phyp_dump_reserve_mem(void) {}
694#endif
695
696void __init early_init_devtree(void *params)
697{
698 phys_addr_t limit;
699
700 DBG(" -> early_init_devtree(%p)\n", params);
701
702
703 initial_boot_params = params;
704
705#ifdef CONFIG_PPC_RTAS
706
707 of_scan_flat_dt(early_init_dt_scan_rtas, NULL);
708#endif
709
710#ifdef CONFIG_PHYP_DUMP
711
712 of_scan_flat_dt(early_init_dt_scan_phyp_dump, NULL);
713#endif
714
715
716
717
718
719 of_scan_flat_dt(early_init_dt_scan_chosen_ppc, cmd_line);
720
721
722 memblock_init();
723
724 of_scan_flat_dt(early_init_dt_scan_root, NULL);
725 of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL);
726 setup_initial_memory_limit(memstart_addr, first_memblock_size);
727
728
729 strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);
730 parse_early_param();
731
732
733 memblock_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START);
734
735 if (PHYSICAL_START > MEMORY_START)
736 memblock_reserve(MEMORY_START, 0x8000);
737 reserve_kdump_trampoline();
738 reserve_crashkernel();
739 early_reserve_mem();
740 phyp_dump_reserve_mem();
741
742 limit = memory_limit;
743 if (! limit) {
744 phys_addr_t memsize;
745
746
747
748 memblock_analyze();
749 memsize = memblock_phys_mem_size();
750 if ((memsize & PAGE_MASK) != memsize)
751 limit = memsize & PAGE_MASK;
752 }
753 memblock_enforce_memory_limit(limit);
754
755 memblock_analyze();
756 memblock_dump_all();
757
758 DBG("Phys. mem: %llx\n", memblock_phys_mem_size());
759
760
761
762 move_device_tree();
763
764 allocate_pacas();
765
766 DBG("Scanning CPUs ...\n");
767
768
769
770
771 of_scan_flat_dt(early_init_dt_scan_cpus, NULL);
772
773#if defined(CONFIG_SMP) && defined(CONFIG_PPC64)
774
775
776
777 spinning_secondaries = boot_cpu_count - 1;
778#endif
779
780 DBG(" <- early_init_devtree()\n");
781}
782
783
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787
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789
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799
800
801
802struct device_node *of_find_next_cache_node(struct device_node *np)
803{
804 struct device_node *child;
805 const phandle *handle;
806
807 handle = of_get_property(np, "l2-cache", NULL);
808 if (!handle)
809 handle = of_get_property(np, "next-level-cache", NULL);
810
811 if (handle)
812 return of_find_node_by_phandle(*handle);
813
814
815
816
817 if (!strcmp(np->type, "cpu"))
818 for_each_child_of_node(np, child)
819 if (!strcmp(child->type, "cache"))
820 return child;
821
822 return NULL;
823}
824
825#ifdef CONFIG_PPC_PSERIES
826
827
828
829
830
831static int of_finish_dynamic_node(struct device_node *node)
832{
833 struct device_node *parent = of_get_parent(node);
834 int err = 0;
835 const phandle *ibm_phandle;
836
837 node->name = of_get_property(node, "name", NULL);
838 node->type = of_get_property(node, "device_type", NULL);
839
840 if (!node->name)
841 node->name = "<NULL>";
842 if (!node->type)
843 node->type = "<NULL>";
844
845 if (!parent) {
846 err = -ENODEV;
847 goto out;
848 }
849
850
851
852
853 if (machine_is(powermac))
854 return -ENODEV;
855
856
857 if ((ibm_phandle = of_get_property(node, "ibm,phandle", NULL)))
858 node->phandle = *ibm_phandle;
859
860out:
861 of_node_put(parent);
862 return err;
863}
864
865static int prom_reconfig_notifier(struct notifier_block *nb,
866 unsigned long action, void *node)
867{
868 int err;
869
870 switch (action) {
871 case PSERIES_RECONFIG_ADD:
872 err = of_finish_dynamic_node(node);
873 if (err < 0)
874 printk(KERN_ERR "finish_node returned %d\n", err);
875 break;
876 default:
877 err = 0;
878 break;
879 }
880 return notifier_from_errno(err);
881}
882
883static struct notifier_block prom_reconfig_nb = {
884 .notifier_call = prom_reconfig_notifier,
885 .priority = 10,
886};
887
888static int __init prom_reconfig_setup(void)
889{
890 return pSeries_reconfig_notifier_register(&prom_reconfig_nb);
891}
892__initcall(prom_reconfig_setup);
893#endif
894
895
896
897
898
899struct device_node *of_get_cpu_node(int cpu, unsigned int *thread)
900{
901 int hardid;
902 struct device_node *np;
903
904 hardid = get_hard_smp_processor_id(cpu);
905
906 for_each_node_by_type(np, "cpu") {
907 const u32 *intserv;
908 unsigned int plen, t;
909
910
911
912
913 intserv = of_get_property(np, "ibm,ppc-interrupt-server#s",
914 &plen);
915 if (intserv == NULL) {
916 const u32 *reg = of_get_property(np, "reg", NULL);
917 if (reg == NULL)
918 continue;
919 if (*reg == hardid) {
920 if (thread)
921 *thread = 0;
922 return np;
923 }
924 } else {
925 plen /= sizeof(u32);
926 for (t = 0; t < plen; t++) {
927 if (hardid == intserv[t]) {
928 if (thread)
929 *thread = t;
930 return np;
931 }
932 }
933 }
934 }
935 return NULL;
936}
937EXPORT_SYMBOL(of_get_cpu_node);
938
939#if defined(CONFIG_DEBUG_FS) && defined(DEBUG)
940static struct debugfs_blob_wrapper flat_dt_blob;
941
942static int __init export_flat_device_tree(void)
943{
944 struct dentry *d;
945
946 flat_dt_blob.data = initial_boot_params;
947 flat_dt_blob.size = initial_boot_params->totalsize;
948
949 d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR,
950 powerpc_debugfs_root, &flat_dt_blob);
951 if (!d)
952 return 1;
953
954 return 0;
955}
956__initcall(export_flat_device_tree);
957#endif
958