This source file includes following definitions.
- early_parse_mem
- overlaps_initrd
- move_device_tree
- scan_features
- check_cpu_pa_features
- init_mmu_slb_size
- identical_pvr_fixup
- check_cpu_feature_properties
- early_init_dt_scan_cpus
- early_init_dt_scan_chosen_ppc
- validate_mem_limit
- validate_mem_limit
- early_init_drmem_lmb
- early_init_dt_scan_memory_ppc
- early_init_dt_add_memory_arch
- early_reserve_mem_dt
- early_reserve_mem
- parse_ppc_tm
- tm_init
- tm_init
- early_init_devtree
- early_get_first_memblock_info
- of_get_ibm_chip_id
- cpu_to_chip_id
- arch_match_cpu_phys_id
1
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10
11
12 #undef DEBUG
13
14 #include <stdarg.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
17 #include <linux/init.h>
18 #include <linux/threads.h>
19 #include <linux/spinlock.h>
20 #include <linux/types.h>
21 #include <linux/pci.h>
22 #include <linux/delay.h>
23 #include <linux/initrd.h>
24 #include <linux/bitops.h>
25 #include <linux/export.h>
26 #include <linux/kexec.h>
27 #include <linux/irq.h>
28 #include <linux/memblock.h>
29 #include <linux/of.h>
30 #include <linux/of_fdt.h>
31 #include <linux/libfdt.h>
32 #include <linux/cpu.h>
33
34 #include <asm/prom.h>
35 #include <asm/rtas.h>
36 #include <asm/page.h>
37 #include <asm/processor.h>
38 #include <asm/irq.h>
39 #include <asm/io.h>
40 #include <asm/kdump.h>
41 #include <asm/smp.h>
42 #include <asm/mmu.h>
43 #include <asm/paca.h>
44 #include <asm/pgtable.h>
45 #include <asm/powernv.h>
46 #include <asm/iommu.h>
47 #include <asm/btext.h>
48 #include <asm/sections.h>
49 #include <asm/machdep.h>
50 #include <asm/pci-bridge.h>
51 #include <asm/kexec.h>
52 #include <asm/opal.h>
53 #include <asm/fadump.h>
54 #include <asm/epapr_hcalls.h>
55 #include <asm/firmware.h>
56 #include <asm/dt_cpu_ftrs.h>
57 #include <asm/drmem.h>
58 #include <asm/ultravisor.h>
59
60 #include <mm/mmu_decl.h>
61
62 #ifdef DEBUG
63 #define DBG(fmt...) printk(KERN_ERR fmt)
64 #else
65 #define DBG(fmt...)
66 #endif
67
68 #ifdef CONFIG_PPC64
69 int __initdata iommu_is_off;
70 int __initdata iommu_force_on;
71 unsigned long tce_alloc_start, tce_alloc_end;
72 u64 ppc64_rma_size;
73 #endif
74 static phys_addr_t first_memblock_size;
75 static int __initdata boot_cpu_count;
76
77 static int __init early_parse_mem(char *p)
78 {
79 if (!p)
80 return 1;
81
82 memory_limit = PAGE_ALIGN(memparse(p, &p));
83 DBG("memory limit = 0x%llx\n", memory_limit);
84
85 return 0;
86 }
87 early_param("mem", early_parse_mem);
88
89
90
91
92
93 static inline int overlaps_initrd(unsigned long start, unsigned long size)
94 {
95 #ifdef CONFIG_BLK_DEV_INITRD
96 if (!initrd_start)
97 return 0;
98
99 return (start + size) > _ALIGN_DOWN(initrd_start, PAGE_SIZE) &&
100 start <= _ALIGN_UP(initrd_end, PAGE_SIZE);
101 #else
102 return 0;
103 #endif
104 }
105
106
107
108
109
110
111
112
113 static void __init move_device_tree(void)
114 {
115 unsigned long start, size;
116 void *p;
117
118 DBG("-> move_device_tree\n");
119
120 start = __pa(initial_boot_params);
121 size = fdt_totalsize(initial_boot_params);
122
123 if ((memory_limit && (start + size) > PHYSICAL_START + memory_limit) ||
124 !memblock_is_memory(start + size - 1) ||
125 overlaps_crashkernel(start, size) || overlaps_initrd(start, size)) {
126 p = memblock_alloc_raw(size, PAGE_SIZE);
127 if (!p)
128 panic("Failed to allocate %lu bytes to move device tree\n",
129 size);
130 memcpy(p, initial_boot_params, size);
131 initial_boot_params = p;
132 DBG("Moved device tree to 0x%px\n", p);
133 }
134
135 DBG("<- move_device_tree\n");
136 }
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151 static struct ibm_pa_feature {
152 unsigned long cpu_features;
153 unsigned long mmu_features;
154 unsigned int cpu_user_ftrs;
155 unsigned int cpu_user_ftrs2;
156 unsigned char pabyte;
157 unsigned char pabit;
158 unsigned char invert;
159 } ibm_pa_features[] __initdata = {
160 { .pabyte = 0, .pabit = 0, .cpu_user_ftrs = PPC_FEATURE_HAS_MMU },
161 { .pabyte = 0, .pabit = 1, .cpu_user_ftrs = PPC_FEATURE_HAS_FPU },
162 { .pabyte = 0, .pabit = 3, .cpu_features = CPU_FTR_CTRL },
163 { .pabyte = 0, .pabit = 6, .cpu_features = CPU_FTR_NOEXECUTE },
164 { .pabyte = 1, .pabit = 2, .mmu_features = MMU_FTR_CI_LARGE_PAGE },
165 #ifdef CONFIG_PPC_RADIX_MMU
166 { .pabyte = 40, .pabit = 0, .mmu_features = MMU_FTR_TYPE_RADIX },
167 #endif
168 { .pabyte = 1, .pabit = 1, .invert = 1, .cpu_features = CPU_FTR_NODSISRALIGN },
169 { .pabyte = 5, .pabit = 0, .cpu_features = CPU_FTR_REAL_LE,
170 .cpu_user_ftrs = PPC_FEATURE_TRUE_LE },
171
172
173
174
175
176 { .pabyte = 22, .pabit = 0, .cpu_features = CPU_FTR_TM_COMP,
177 .cpu_user_ftrs2 = PPC_FEATURE2_HTM_COMP | PPC_FEATURE2_HTM_NOSC_COMP },
178 };
179
180 static void __init scan_features(unsigned long node, const unsigned char *ftrs,
181 unsigned long tablelen,
182 struct ibm_pa_feature *fp,
183 unsigned long ft_size)
184 {
185 unsigned long i, len, bit;
186
187
188 for (;;) {
189 if (tablelen < 3)
190 return;
191 len = 2 + ftrs[0];
192 if (tablelen < len)
193 return;
194 if (ftrs[1] == 0)
195 break;
196 tablelen -= len;
197 ftrs += len;
198 }
199
200
201 for (i = 0; i < ft_size; ++i, ++fp) {
202 if (fp->pabyte >= ftrs[0])
203 continue;
204 bit = (ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1;
205 if (bit ^ fp->invert) {
206 cur_cpu_spec->cpu_features |= fp->cpu_features;
207 cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs;
208 cur_cpu_spec->cpu_user_features2 |= fp->cpu_user_ftrs2;
209 cur_cpu_spec->mmu_features |= fp->mmu_features;
210 } else {
211 cur_cpu_spec->cpu_features &= ~fp->cpu_features;
212 cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs;
213 cur_cpu_spec->cpu_user_features2 &= ~fp->cpu_user_ftrs2;
214 cur_cpu_spec->mmu_features &= ~fp->mmu_features;
215 }
216 }
217 }
218
219 static void __init check_cpu_pa_features(unsigned long node)
220 {
221 const unsigned char *pa_ftrs;
222 int tablelen;
223
224 pa_ftrs = of_get_flat_dt_prop(node, "ibm,pa-features", &tablelen);
225 if (pa_ftrs == NULL)
226 return;
227
228 scan_features(node, pa_ftrs, tablelen,
229 ibm_pa_features, ARRAY_SIZE(ibm_pa_features));
230 }
231
232 #ifdef CONFIG_PPC_BOOK3S_64
233 static void __init init_mmu_slb_size(unsigned long node)
234 {
235 const __be32 *slb_size_ptr;
236
237 slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL) ? :
238 of_get_flat_dt_prop(node, "ibm,slb-size", NULL);
239
240 if (slb_size_ptr)
241 mmu_slb_size = be32_to_cpup(slb_size_ptr);
242 }
243 #else
244 #define init_mmu_slb_size(node) do { } while(0)
245 #endif
246
247 static struct feature_property {
248 const char *name;
249 u32 min_value;
250 unsigned long cpu_feature;
251 unsigned long cpu_user_ftr;
252 } feature_properties[] __initdata = {
253 #ifdef CONFIG_ALTIVEC
254 {"altivec", 0, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC},
255 {"ibm,vmx", 1, CPU_FTR_ALTIVEC, PPC_FEATURE_HAS_ALTIVEC},
256 #endif
257 #ifdef CONFIG_VSX
258
259 {"ibm,vmx", 2, CPU_FTR_VSX, PPC_FEATURE_HAS_VSX},
260 #endif
261 #ifdef CONFIG_PPC64
262 {"ibm,dfp", 1, 0, PPC_FEATURE_HAS_DFP},
263 {"ibm,purr", 1, CPU_FTR_PURR, 0},
264 {"ibm,spurr", 1, CPU_FTR_SPURR, 0},
265 #endif
266 };
267
268 #if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU)
269 static inline void identical_pvr_fixup(unsigned long node)
270 {
271 unsigned int pvr;
272 const char *model = of_get_flat_dt_prop(node, "model", NULL);
273
274
275
276
277
278
279
280
281 if (model && strstr(model, "440EP")) {
282 pvr = cur_cpu_spec->pvr_value | 0x8;
283 identify_cpu(0, pvr);
284 DBG("Using logical pvr %x for %s\n", pvr, model);
285 }
286 }
287 #else
288 #define identical_pvr_fixup(node) do { } while(0)
289 #endif
290
291 static void __init check_cpu_feature_properties(unsigned long node)
292 {
293 int i;
294 struct feature_property *fp = feature_properties;
295 const __be32 *prop;
296
297 for (i = 0; i < (int)ARRAY_SIZE(feature_properties); ++i, ++fp) {
298 prop = of_get_flat_dt_prop(node, fp->name, NULL);
299 if (prop && be32_to_cpup(prop) >= fp->min_value) {
300 cur_cpu_spec->cpu_features |= fp->cpu_feature;
301 cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr;
302 }
303 }
304 }
305
306 static int __init early_init_dt_scan_cpus(unsigned long node,
307 const char *uname, int depth,
308 void *data)
309 {
310 const char *type = of_get_flat_dt_prop(node, "device_type", NULL);
311 const __be32 *prop;
312 const __be32 *intserv;
313 int i, nthreads;
314 int len;
315 int found = -1;
316 int found_thread = 0;
317
318
319 if (type == NULL || strcmp(type, "cpu") != 0)
320 return 0;
321
322
323 intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len);
324 if (!intserv)
325 intserv = of_get_flat_dt_prop(node, "reg", &len);
326
327 nthreads = len / sizeof(int);
328
329
330
331
332
333 for (i = 0; i < nthreads; i++) {
334 if (be32_to_cpu(intserv[i]) ==
335 fdt_boot_cpuid_phys(initial_boot_params)) {
336 found = boot_cpu_count;
337 found_thread = i;
338 }
339 #ifdef CONFIG_SMP
340
341 boot_cpu_count++;
342 #endif
343 }
344
345
346 if (found < 0)
347 return 0;
348
349 DBG("boot cpu: logical %d physical %d\n", found,
350 be32_to_cpu(intserv[found_thread]));
351 boot_cpuid = found;
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372 if (!dt_cpu_ftrs_in_use()) {
373 prop = of_get_flat_dt_prop(node, "cpu-version", NULL);
374 if (prop && (be32_to_cpup(prop) & 0xff000000) == 0x0f000000)
375 identify_cpu(0, be32_to_cpup(prop));
376
377 check_cpu_feature_properties(node);
378 check_cpu_pa_features(node);
379 }
380
381 identical_pvr_fixup(node);
382 init_mmu_slb_size(node);
383
384 #ifdef CONFIG_PPC64
385 if (nthreads == 1)
386 cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT;
387 else if (!dt_cpu_ftrs_in_use())
388 cur_cpu_spec->cpu_features |= CPU_FTR_SMT;
389 allocate_paca(boot_cpuid);
390 #endif
391 set_hard_smp_processor_id(found, be32_to_cpu(intserv[found_thread]));
392
393 return 0;
394 }
395
396 static int __init early_init_dt_scan_chosen_ppc(unsigned long node,
397 const char *uname,
398 int depth, void *data)
399 {
400 const unsigned long *lprop;
401
402
403 if (early_init_dt_scan_chosen(node, uname, depth, data) == 0)
404 return 0;
405
406 #ifdef CONFIG_PPC64
407
408 if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL)
409 iommu_is_off = 1;
410 if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL)
411 iommu_force_on = 1;
412 #endif
413
414
415 lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL);
416 if (lprop)
417 memory_limit = *lprop;
418
419 #ifdef CONFIG_PPC64
420 lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL);
421 if (lprop)
422 tce_alloc_start = *lprop;
423 lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL);
424 if (lprop)
425 tce_alloc_end = *lprop;
426 #endif
427
428 #ifdef CONFIG_KEXEC_CORE
429 lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL);
430 if (lprop)
431 crashk_res.start = *lprop;
432
433 lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL);
434 if (lprop)
435 crashk_res.end = crashk_res.start + *lprop - 1;
436 #endif
437
438
439 return 1;
440 }
441
442
443
444
445
446
447 #ifdef CONFIG_SPARSEMEM
448 static bool validate_mem_limit(u64 base, u64 *size)
449 {
450 u64 max_mem = 1UL << (MAX_PHYSMEM_BITS);
451
452 if (base >= max_mem)
453 return false;
454 if ((base + *size) > max_mem)
455 *size = max_mem - base;
456 return true;
457 }
458 #else
459 static bool validate_mem_limit(u64 base, u64 *size)
460 {
461 return true;
462 }
463 #endif
464
465 #ifdef CONFIG_PPC_PSERIES
466
467
468
469
470
471 static void __init early_init_drmem_lmb(struct drmem_lmb *lmb,
472 const __be32 **usm)
473 {
474 u64 base, size;
475 int is_kexec_kdump = 0, rngs;
476
477 base = lmb->base_addr;
478 size = drmem_lmb_size();
479 rngs = 1;
480
481
482
483
484
485 if ((lmb->flags & DRCONF_MEM_RESERVED) ||
486 !(lmb->flags & DRCONF_MEM_ASSIGNED))
487 return;
488
489 if (*usm)
490 is_kexec_kdump = 1;
491
492 if (is_kexec_kdump) {
493
494
495
496
497
498
499
500 rngs = dt_mem_next_cell(dt_root_size_cells, usm);
501 if (!rngs)
502 return;
503 }
504
505 do {
506 if (is_kexec_kdump) {
507 base = dt_mem_next_cell(dt_root_addr_cells, usm);
508 size = dt_mem_next_cell(dt_root_size_cells, usm);
509 }
510
511 if (iommu_is_off) {
512 if (base >= 0x80000000ul)
513 continue;
514 if ((base + size) > 0x80000000ul)
515 size = 0x80000000ul - base;
516 }
517
518 DBG("Adding: %llx -> %llx\n", base, size);
519 if (validate_mem_limit(base, &size))
520 memblock_add(base, size);
521 } while (--rngs);
522 }
523 #endif
524
525 static int __init early_init_dt_scan_memory_ppc(unsigned long node,
526 const char *uname,
527 int depth, void *data)
528 {
529 #ifdef CONFIG_PPC_PSERIES
530 if (depth == 1 &&
531 strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0) {
532 walk_drmem_lmbs_early(node, early_init_drmem_lmb);
533 return 0;
534 }
535 #endif
536
537 return early_init_dt_scan_memory(node, uname, depth, data);
538 }
539
540
541
542
543
544
545
546
547
548 #ifdef CONFIG_RELOCATABLE
549 static int add_mem_to_memblock = 1;
550 #else
551 #define add_mem_to_memblock 1
552 #endif
553
554 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
555 {
556 #ifdef CONFIG_PPC64
557 if (iommu_is_off) {
558 if (base >= 0x80000000ul)
559 return;
560 if ((base + size) > 0x80000000ul)
561 size = 0x80000000ul - base;
562 }
563 #endif
564
565
566
567
568 if (base < memstart_addr) {
569 memstart_addr = base;
570 first_memblock_size = size;
571 }
572
573
574 if (add_mem_to_memblock) {
575 if (validate_mem_limit(base, &size))
576 memblock_add(base, size);
577 }
578 }
579
580 static void __init early_reserve_mem_dt(void)
581 {
582 unsigned long i, dt_root;
583 int len;
584 const __be32 *prop;
585
586 early_init_fdt_reserve_self();
587 early_init_fdt_scan_reserved_mem();
588
589 dt_root = of_get_flat_dt_root();
590
591 prop = of_get_flat_dt_prop(dt_root, "reserved-ranges", &len);
592
593 if (!prop)
594 return;
595
596 DBG("Found new-style reserved-ranges\n");
597
598
599
600 for (i = 0; i < len / (sizeof(*prop) * 4); i++) {
601 u64 base, size;
602
603 base = of_read_number(prop + (i * 4) + 0, 2);
604 size = of_read_number(prop + (i * 4) + 2, 2);
605
606 if (size) {
607 DBG("reserving: %llx -> %llx\n", base, size);
608 memblock_reserve(base, size);
609 }
610 }
611 }
612
613 static void __init early_reserve_mem(void)
614 {
615 __be64 *reserve_map;
616
617 reserve_map = (__be64 *)(((unsigned long)initial_boot_params) +
618 fdt_off_mem_rsvmap(initial_boot_params));
619
620
621 early_reserve_mem_dt();
622
623 #ifdef CONFIG_BLK_DEV_INITRD
624
625 if (initrd_start && (initrd_end > initrd_start)) {
626 memblock_reserve(_ALIGN_DOWN(__pa(initrd_start), PAGE_SIZE),
627 _ALIGN_UP(initrd_end, PAGE_SIZE) -
628 _ALIGN_DOWN(initrd_start, PAGE_SIZE));
629 }
630 #endif
631
632 #ifdef CONFIG_PPC32
633
634
635
636
637 if (be64_to_cpup(reserve_map) > 0xffffffffull) {
638 u32 base_32, size_32;
639 __be32 *reserve_map_32 = (__be32 *)reserve_map;
640
641 DBG("Found old 32-bit reserve map\n");
642
643 while (1) {
644 base_32 = be32_to_cpup(reserve_map_32++);
645 size_32 = be32_to_cpup(reserve_map_32++);
646 if (size_32 == 0)
647 break;
648 DBG("reserving: %x -> %x\n", base_32, size_32);
649 memblock_reserve(base_32, size_32);
650 }
651 return;
652 }
653 #endif
654 }
655
656 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
657 static bool tm_disabled __initdata;
658
659 static int __init parse_ppc_tm(char *str)
660 {
661 bool res;
662
663 if (kstrtobool(str, &res))
664 return -EINVAL;
665
666 tm_disabled = !res;
667
668 return 0;
669 }
670 early_param("ppc_tm", parse_ppc_tm);
671
672 static void __init tm_init(void)
673 {
674 if (tm_disabled) {
675 pr_info("Disabling hardware transactional memory (HTM)\n");
676 cur_cpu_spec->cpu_user_features2 &=
677 ~(PPC_FEATURE2_HTM_NOSC | PPC_FEATURE2_HTM);
678 cur_cpu_spec->cpu_features &= ~CPU_FTR_TM;
679 return;
680 }
681
682 pnv_tm_init();
683 }
684 #else
685 static void tm_init(void) { }
686 #endif
687
688 void __init early_init_devtree(void *params)
689 {
690 phys_addr_t limit;
691
692 DBG(" -> early_init_devtree(%px)\n", params);
693
694
695 if (!early_init_dt_verify(params))
696 panic("BUG: Failed verifying flat device tree, bad version?");
697
698 #ifdef CONFIG_PPC_RTAS
699
700 of_scan_flat_dt(early_init_dt_scan_rtas, NULL);
701 #endif
702
703 #ifdef CONFIG_PPC_POWERNV
704
705 of_scan_flat_dt(early_init_dt_scan_opal, NULL);
706
707
708 of_scan_flat_dt(early_init_dt_scan_ultravisor, NULL);
709 #endif
710
711 #if defined(CONFIG_FA_DUMP) || defined(CONFIG_PRESERVE_FA_DUMP)
712
713 of_scan_flat_dt(early_init_dt_scan_fw_dump, NULL);
714 #endif
715
716
717
718
719
720 of_scan_flat_dt(early_init_dt_scan_chosen_ppc, boot_command_line);
721
722
723 of_scan_flat_dt(early_init_dt_scan_root, NULL);
724 of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL);
725
726 parse_early_param();
727
728
729 if (memory_limit)
730 first_memblock_size = min_t(u64, first_memblock_size, memory_limit);
731 setup_initial_memory_limit(memstart_addr, first_memblock_size);
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 #if defined(CONFIG_FA_DUMP) || defined(CONFIG_PRESERVE_FA_DUMP)
739
740
741
742
743 if (fadump_reserve_mem() == 0)
744 #endif
745 reserve_crashkernel();
746 early_reserve_mem();
747
748
749 limit = ALIGN(memory_limit ?: memblock_phys_mem_size(), PAGE_SIZE);
750 memblock_enforce_memory_limit(limit);
751
752 memblock_allow_resize();
753 memblock_dump_all();
754
755 DBG("Phys. mem: %llx\n", (unsigned long long)memblock_phys_mem_size());
756
757
758
759 move_device_tree();
760
761 allocate_paca_ptrs();
762
763 DBG("Scanning CPUs ...\n");
764
765 dt_cpu_ftrs_scan();
766
767
768
769
770 of_scan_flat_dt(early_init_dt_scan_cpus, NULL);
771 if (boot_cpuid < 0) {
772 printk("Failed to identify boot CPU !\n");
773 BUG();
774 }
775
776 #if defined(CONFIG_SMP) && defined(CONFIG_PPC64)
777
778
779
780 spinning_secondaries = boot_cpu_count - 1;
781 #endif
782
783 mmu_early_init_devtree();
784
785 #ifdef CONFIG_PPC_POWERNV
786
787 of_scan_flat_dt(early_init_dt_scan_recoverable_ranges, NULL);
788 #endif
789 epapr_paravirt_early_init();
790
791
792 pseries_probe_fw_features();
793
794 #ifdef CONFIG_PPC_PS3
795
796 if (of_flat_dt_is_compatible(of_get_flat_dt_root(), "sony,ps3"))
797 powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE;
798 #endif
799
800 tm_init();
801
802 DBG(" <- early_init_devtree()\n");
803 }
804
805 #ifdef CONFIG_RELOCATABLE
806
807
808
809
810 void __init early_get_first_memblock_info(void *params, phys_addr_t *size)
811 {
812
813 initial_boot_params = params;
814
815
816
817
818
819 add_mem_to_memblock = 0;
820 of_scan_flat_dt(early_init_dt_scan_root, NULL);
821 of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL);
822 add_mem_to_memblock = 1;
823
824 if (size)
825 *size = first_memblock_size;
826 }
827 #endif
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848 int of_get_ibm_chip_id(struct device_node *np)
849 {
850 of_node_get(np);
851 while (np) {
852 u32 chip_id;
853
854
855
856
857
858 if (!of_property_read_u32(np, "ibm,chip-id", &chip_id)) {
859 of_node_put(np);
860 return chip_id;
861 }
862
863 np = of_get_next_parent(np);
864 }
865 return -1;
866 }
867 EXPORT_SYMBOL(of_get_ibm_chip_id);
868
869
870
871
872
873
874
875
876 int cpu_to_chip_id(int cpu)
877 {
878 struct device_node *np;
879
880 np = of_get_cpu_node(cpu, NULL);
881 if (!np)
882 return -1;
883
884 of_node_put(np);
885 return of_get_ibm_chip_id(np);
886 }
887 EXPORT_SYMBOL(cpu_to_chip_id);
888
889 bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
890 {
891 #ifdef CONFIG_SMP
892
893
894
895
896
897 if (cpu_to_phys_id != NULL)
898 return (int)phys_id == cpu_to_phys_id[cpu];
899 #endif
900
901 return (int)phys_id == get_hard_smp_processor_id(cpu);
902 }