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18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <linux/sched.h>
22#include <linux/smp.h>
23#include <linux/string.h>
24#include <linux/types.h>
25#include <linux/irq.h>
26#include <linux/acpi.h>
27#include <linux/efi.h>
28#include <linux/mmzone.h>
29#include <linux/nodemask.h>
30#include <linux/slab.h>
31#include <acpi/processor.h>
32#include <asm/io.h>
33#include <asm/iosapic.h>
34#include <asm/page.h>
35#include <asm/numa.h>
36#include <asm/sal.h>
37#include <asm/cyclone.h>
38
39#define PREFIX "ACPI: "
40
41int acpi_lapic;
42unsigned int acpi_cpei_override;
43unsigned int acpi_cpei_phys_cpuid;
44
45#define ACPI_MAX_PLATFORM_INTERRUPTS 256
46
47
48int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
49 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
50};
51
52enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
53
54
55
56
57
58int acpi_request_vector(u32 int_type)
59{
60 int vector = -1;
61
62 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
63
64 vector = platform_intr_list[int_type];
65 } else
66 printk(KERN_ERR
67 "acpi_request_vector(): invalid interrupt type\n");
68 return vector;
69}
70
71void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
72{
73 return __va(phys);
74}
75
76void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
77{
78}
79
80
81
82
83
84static int available_cpus __initdata;
85struct acpi_table_madt *acpi_madt __initdata;
86static u8 has_8259;
87
88static int __init
89acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
90 const unsigned long end)
91{
92 struct acpi_madt_local_apic_override *lapic;
93
94 lapic = (struct acpi_madt_local_apic_override *)header;
95
96 if (BAD_MADT_ENTRY(lapic, end))
97 return -EINVAL;
98
99 if (lapic->address) {
100 iounmap(ipi_base_addr);
101 ipi_base_addr = ioremap(lapic->address, 0);
102 }
103 return 0;
104}
105
106static int __init
107acpi_parse_lsapic(union acpi_subtable_headers *header, const unsigned long end)
108{
109 struct acpi_madt_local_sapic *lsapic;
110
111 lsapic = (struct acpi_madt_local_sapic *)header;
112
113
114
115 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
116#ifdef CONFIG_SMP
117 smp_boot_data.cpu_phys_id[available_cpus] =
118 (lsapic->id << 8) | lsapic->eid;
119#endif
120 ++available_cpus;
121 }
122
123 total_cpus++;
124 return 0;
125}
126
127static int __init
128acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
129{
130 struct acpi_madt_local_apic_nmi *lacpi_nmi;
131
132 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
133
134 if (BAD_MADT_ENTRY(lacpi_nmi, end))
135 return -EINVAL;
136
137
138 return 0;
139}
140
141static int __init
142acpi_parse_iosapic(union acpi_subtable_headers * header, const unsigned long end)
143{
144 struct acpi_madt_io_sapic *iosapic;
145
146 iosapic = (struct acpi_madt_io_sapic *)header;
147
148 if (BAD_MADT_ENTRY(iosapic, end))
149 return -EINVAL;
150
151 return iosapic_init(iosapic->address, iosapic->global_irq_base);
152}
153
154static unsigned int __initdata acpi_madt_rev;
155
156static int __init
157acpi_parse_plat_int_src(union acpi_subtable_headers * header,
158 const unsigned long end)
159{
160 struct acpi_madt_interrupt_source *plintsrc;
161 int vector;
162
163 plintsrc = (struct acpi_madt_interrupt_source *)header;
164
165 if (BAD_MADT_ENTRY(plintsrc, end))
166 return -EINVAL;
167
168
169
170
171
172 vector = iosapic_register_platform_intr(plintsrc->type,
173 plintsrc->global_irq,
174 plintsrc->io_sapic_vector,
175 plintsrc->eid,
176 plintsrc->id,
177 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
178 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
179 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
180 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
181 ACPI_MADT_TRIGGER_EDGE) ?
182 IOSAPIC_EDGE : IOSAPIC_LEVEL);
183
184 platform_intr_list[plintsrc->type] = vector;
185 if (acpi_madt_rev > 1) {
186 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
187 }
188
189
190
191
192 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
193
194 return 0;
195}
196
197#ifdef CONFIG_HOTPLUG_CPU
198unsigned int can_cpei_retarget(void)
199{
200 extern int cpe_vector;
201 extern unsigned int force_cpei_retarget;
202
203
204
205
206
207
208 if (cpe_vector > 0) {
209 if (acpi_cpei_override || force_cpei_retarget)
210 return 1;
211 else
212 return 0;
213 }
214 return 1;
215}
216
217unsigned int is_cpu_cpei_target(unsigned int cpu)
218{
219 unsigned int logical_id;
220
221 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
222
223 if (logical_id == cpu)
224 return 1;
225 else
226 return 0;
227}
228
229void set_cpei_target_cpu(unsigned int cpu)
230{
231 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
232}
233#endif
234
235unsigned int get_cpei_target_cpu(void)
236{
237 return acpi_cpei_phys_cpuid;
238}
239
240static int __init
241acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
242 const unsigned long end)
243{
244 struct acpi_madt_interrupt_override *p;
245
246 p = (struct acpi_madt_interrupt_override *)header;
247
248 if (BAD_MADT_ENTRY(p, end))
249 return -EINVAL;
250
251 iosapic_override_isa_irq(p->source_irq, p->global_irq,
252 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
253 ACPI_MADT_POLARITY_ACTIVE_LOW) ?
254 IOSAPIC_POL_LOW : IOSAPIC_POL_HIGH,
255 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
256 ACPI_MADT_TRIGGER_LEVEL) ?
257 IOSAPIC_LEVEL : IOSAPIC_EDGE);
258 return 0;
259}
260
261static int __init
262acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
263{
264 struct acpi_madt_nmi_source *nmi_src;
265
266 nmi_src = (struct acpi_madt_nmi_source *)header;
267
268 if (BAD_MADT_ENTRY(nmi_src, end))
269 return -EINVAL;
270
271
272 return 0;
273}
274
275static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
276{
277 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
278
279
280
281
282
283
284 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
285
286 cyclone_setup();
287 }
288}
289
290static int __init acpi_parse_madt(struct acpi_table_header *table)
291{
292 acpi_madt = (struct acpi_table_madt *)table;
293
294 acpi_madt_rev = acpi_madt->header.revision;
295
296
297#ifdef CONFIG_ITANIUM
298 has_8259 = 1;
299#else
300 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
301#endif
302 iosapic_system_init(has_8259);
303
304
305
306 if (acpi_madt->address)
307 ipi_base_addr = ioremap(acpi_madt->address, 0);
308
309 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
310
311 acpi_madt_oem_check(acpi_madt->header.oem_id,
312 acpi_madt->header.oem_table_id);
313
314 return 0;
315}
316
317#ifdef CONFIG_ACPI_NUMA
318
319#undef SLIT_DEBUG
320
321#define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
322
323static int __initdata srat_num_cpus;
324static u32 pxm_flag[PXM_FLAG_LEN];
325#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
326#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
327static struct acpi_table_slit __initdata *slit_table;
328cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
329
330static int __init
331get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
332{
333 int pxm;
334
335 pxm = pa->proximity_domain_lo;
336 if (acpi_srat_revision >= 2)
337 pxm += pa->proximity_domain_hi[0] << 8;
338 return pxm;
339}
340
341static int __init
342get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
343{
344 int pxm;
345
346 pxm = ma->proximity_domain;
347 if (acpi_srat_revision <= 1)
348 pxm &= 0xff;
349
350 return pxm;
351}
352
353
354
355
356
357void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
358{
359 u32 len;
360
361 len = sizeof(struct acpi_table_header) + 8
362 + slit->locality_count * slit->locality_count;
363 if (slit->header.length != len) {
364 printk(KERN_ERR
365 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
366 len, slit->header.length);
367 return;
368 }
369 slit_table = slit;
370}
371
372void __init
373acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
374{
375 int pxm;
376
377 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
378 return;
379
380 if (srat_num_cpus >= ARRAY_SIZE(node_cpuid)) {
381 printk_once(KERN_WARNING
382 "node_cpuid[%ld] is too small, may not be able to use all cpus\n",
383 ARRAY_SIZE(node_cpuid));
384 return;
385 }
386 pxm = get_processor_proximity_domain(pa);
387
388
389 pxm_bit_set(pxm);
390
391 node_cpuid[srat_num_cpus].phys_id =
392 (pa->apic_id << 8) | (pa->local_sapic_eid);
393
394 node_cpuid[srat_num_cpus].nid = pxm;
395 cpumask_set_cpu(srat_num_cpus, &early_cpu_possible_map);
396 srat_num_cpus++;
397}
398
399int __init
400acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
401{
402 unsigned long paddr, size;
403 int pxm;
404 struct node_memblk_s *p, *q, *pend;
405
406 pxm = get_memory_proximity_domain(ma);
407
408
409 paddr = ma->base_address;
410 size = ma->length;
411
412
413 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
414 return -1;
415
416 if (num_node_memblks >= NR_NODE_MEMBLKS) {
417 pr_err("NUMA: too many memblk ranges\n");
418 return -EINVAL;
419 }
420
421
422 pxm_bit_set(pxm);
423
424
425 pend = &node_memblk[num_node_memblks];
426 for (p = &node_memblk[0]; p < pend; p++) {
427 if (paddr < p->start_paddr)
428 break;
429 }
430 if (p < pend) {
431 for (q = pend - 1; q >= p; q--)
432 *(q + 1) = *q;
433 }
434 p->start_paddr = paddr;
435 p->size = size;
436 p->nid = pxm;
437 num_node_memblks++;
438 return 0;
439}
440
441void __init acpi_numa_fixup(void)
442{
443 int i, j, node_from, node_to;
444
445
446 if (srat_num_cpus == 0) {
447 node_set_online(0);
448 node_cpuid[0].phys_id = hard_smp_processor_id();
449 return;
450 }
451
452
453
454
455
456 nodes_clear(node_online_map);
457 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
458 if (pxm_bit_test(i)) {
459 int nid = acpi_map_pxm_to_node(i);
460 node_set_online(nid);
461 }
462 }
463
464
465 for (i = 0; i < num_node_memblks; i++)
466 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
467
468
469 for_each_online_node(i) {
470 int bank;
471
472 bank = 0;
473 for (j = 0; j < num_node_memblks; j++)
474 if (node_memblk[j].nid == i)
475 node_memblk[j].bank = bank++;
476 }
477
478
479 for_each_possible_early_cpu(i)
480 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
481
482 printk(KERN_INFO "Number of logical nodes in system = %d\n",
483 num_online_nodes());
484 printk(KERN_INFO "Number of memory chunks in system = %d\n",
485 num_node_memblks);
486
487 if (!slit_table) {
488 for (i = 0; i < MAX_NUMNODES; i++)
489 for (j = 0; j < MAX_NUMNODES; j++)
490 slit_distance(i, j) = i == j ?
491 LOCAL_DISTANCE : REMOTE_DISTANCE;
492 return;
493 }
494
495 memset(numa_slit, -1, sizeof(numa_slit));
496 for (i = 0; i < slit_table->locality_count; i++) {
497 if (!pxm_bit_test(i))
498 continue;
499 node_from = pxm_to_node(i);
500 for (j = 0; j < slit_table->locality_count; j++) {
501 if (!pxm_bit_test(j))
502 continue;
503 node_to = pxm_to_node(j);
504 slit_distance(node_from, node_to) =
505 slit_table->entry[i * slit_table->locality_count + j];
506 }
507 }
508
509#ifdef SLIT_DEBUG
510 printk("ACPI 2.0 SLIT locality table:\n");
511 for_each_online_node(i) {
512 for_each_online_node(j)
513 printk("%03d ", node_distance(i, j));
514 printk("\n");
515 }
516#endif
517}
518#endif
519
520
521
522
523
524int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
525{
526 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
527 return gsi;
528
529 if (has_8259 && gsi < 16)
530 return isa_irq_to_vector(gsi);
531
532 return iosapic_register_intr(gsi,
533 (polarity ==
534 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
535 IOSAPIC_POL_LOW,
536 (triggering ==
537 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
538 IOSAPIC_LEVEL);
539}
540EXPORT_SYMBOL_GPL(acpi_register_gsi);
541
542void acpi_unregister_gsi(u32 gsi)
543{
544 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
545 return;
546
547 if (has_8259 && gsi < 16)
548 return;
549
550 iosapic_unregister_intr(gsi);
551}
552EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
553
554static int __init acpi_parse_fadt(struct acpi_table_header *table)
555{
556 struct acpi_table_header *fadt_header;
557 struct acpi_table_fadt *fadt;
558
559 fadt_header = (struct acpi_table_header *)table;
560 if (fadt_header->revision != 3)
561 return -ENODEV;
562
563 fadt = (struct acpi_table_fadt *)fadt_header;
564
565 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
566 ACPI_ACTIVE_LOW);
567 return 0;
568}
569
570int __init early_acpi_boot_init(void)
571{
572 int ret;
573
574
575
576
577
578 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
579 printk(KERN_ERR PREFIX "Can't find MADT\n");
580 return 0;
581 }
582
583 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
584 acpi_parse_lsapic, NR_CPUS);
585 if (ret < 1)
586 printk(KERN_ERR PREFIX
587 "Error parsing MADT - no LAPIC entries\n");
588 else
589 acpi_lapic = 1;
590
591#ifdef CONFIG_SMP
592 if (available_cpus == 0) {
593 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
594 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
595 smp_boot_data.cpu_phys_id[available_cpus] =
596 hard_smp_processor_id();
597 available_cpus = 1;
598 }
599 smp_boot_data.cpu_count = available_cpus;
600#endif
601
602 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
603 total_cpus);
604
605 return 0;
606}
607
608int __init acpi_boot_init(void)
609{
610
611
612
613
614
615
616
617
618
619 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
620 printk(KERN_ERR PREFIX "Can't find MADT\n");
621 goto skip_madt;
622 }
623
624
625
626 if (acpi_table_parse_madt
627 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
628 printk(KERN_ERR PREFIX
629 "Error parsing LAPIC address override entry\n");
630
631 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
632 < 0)
633 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
634
635
636
637 if (acpi_table_parse_madt
638 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
639 printk(KERN_ERR PREFIX
640 "Error parsing MADT - no IOSAPIC entries\n");
641 }
642
643
644
645 if (acpi_table_parse_madt
646 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
647 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
648 printk(KERN_ERR PREFIX
649 "Error parsing platform interrupt source entry\n");
650
651 if (acpi_table_parse_madt
652 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
653 printk(KERN_ERR PREFIX
654 "Error parsing interrupt source overrides entry\n");
655
656 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
657 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
658 skip_madt:
659
660
661
662
663
664
665
666 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
667 printk(KERN_ERR PREFIX "Can't find FADT\n");
668
669#ifdef CONFIG_ACPI_NUMA
670#ifdef CONFIG_SMP
671 if (srat_num_cpus == 0) {
672 int cpu, i = 1;
673 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
674 if (smp_boot_data.cpu_phys_id[cpu] !=
675 hard_smp_processor_id())
676 node_cpuid[i++].phys_id =
677 smp_boot_data.cpu_phys_id[cpu];
678 }
679#endif
680 build_cpu_to_node_map();
681#endif
682 return 0;
683}
684
685int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
686{
687 int tmp;
688
689 if (has_8259 && gsi < 16)
690 *irq = isa_irq_to_vector(gsi);
691 else {
692 tmp = gsi_to_irq(gsi);
693 if (tmp == -1)
694 return -1;
695 *irq = tmp;
696 }
697 return 0;
698}
699
700int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
701{
702 if (isa_irq >= 16)
703 return -1;
704 *gsi = isa_irq;
705 return 0;
706}
707
708
709
710
711#ifdef CONFIG_ACPI_HOTPLUG_CPU
712int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
713{
714#ifdef CONFIG_ACPI_NUMA
715
716
717
718
719
720
721
722 node_cpuid[cpu].phys_id = physid;
723 node_cpuid[cpu].nid = acpi_get_node(handle);
724#endif
725 return 0;
726}
727
728int additional_cpus __initdata = -1;
729
730static __init int setup_additional_cpus(char *s)
731{
732 if (s)
733 additional_cpus = simple_strtol(s, NULL, 0);
734
735 return 0;
736}
737
738early_param("additional_cpus", setup_additional_cpus);
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755__init void prefill_possible_map(void)
756{
757 int i;
758 int possible, disabled_cpus;
759
760 disabled_cpus = total_cpus - available_cpus;
761
762 if (additional_cpus == -1) {
763 if (disabled_cpus > 0)
764 additional_cpus = disabled_cpus;
765 else
766 additional_cpus = 0;
767 }
768
769 possible = available_cpus + additional_cpus;
770
771 if (possible > nr_cpu_ids)
772 possible = nr_cpu_ids;
773
774 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
775 possible, max((possible - available_cpus), 0));
776
777 for (i = 0; i < possible; i++)
778 set_cpu_possible(i, true);
779}
780
781static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
782{
783 cpumask_t tmp_map;
784 int cpu;
785
786 cpumask_complement(&tmp_map, cpu_present_mask);
787 cpu = cpumask_first(&tmp_map);
788 if (cpu >= nr_cpu_ids)
789 return -EINVAL;
790
791 acpi_map_cpu2node(handle, cpu, physid);
792
793 set_cpu_present(cpu, true);
794 ia64_cpu_to_sapicid[cpu] = physid;
795
796 acpi_processor_set_pdc(handle);
797
798 *pcpu = cpu;
799 return (0);
800}
801
802
803int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
804 int *pcpu)
805{
806 return _acpi_map_lsapic(handle, physid, pcpu);
807}
808EXPORT_SYMBOL(acpi_map_cpu);
809
810int acpi_unmap_cpu(int cpu)
811{
812 ia64_cpu_to_sapicid[cpu] = -1;
813 set_cpu_present(cpu, false);
814
815#ifdef CONFIG_ACPI_NUMA
816
817#endif
818
819 return (0);
820}
821EXPORT_SYMBOL(acpi_unmap_cpu);
822#endif
823
824#ifdef CONFIG_ACPI_NUMA
825static acpi_status acpi_map_iosapic(acpi_handle handle, u32 depth,
826 void *context, void **ret)
827{
828 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
829 union acpi_object *obj;
830 struct acpi_madt_io_sapic *iosapic;
831 unsigned int gsi_base;
832 int node;
833
834
835 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
836 return AE_OK;
837
838 if (!buffer.length || !buffer.pointer)
839 return AE_OK;
840
841 obj = buffer.pointer;
842 if (obj->type != ACPI_TYPE_BUFFER ||
843 obj->buffer.length < sizeof(*iosapic)) {
844 kfree(buffer.pointer);
845 return AE_OK;
846 }
847
848 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
849
850 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
851 kfree(buffer.pointer);
852 return AE_OK;
853 }
854
855 gsi_base = iosapic->global_irq_base;
856
857 kfree(buffer.pointer);
858
859
860 node = acpi_get_node(handle);
861 if (node == NUMA_NO_NODE || !node_online(node) ||
862 cpumask_empty(cpumask_of_node(node)))
863 return AE_OK;
864
865
866 map_iosapic_to_node(gsi_base, node);
867 return AE_OK;
868}
869
870static int __init
871acpi_map_iosapics (void)
872{
873 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
874 return 0;
875}
876
877fs_initcall(acpi_map_iosapics);
878#endif
879
880int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
881{
882 int err;
883
884 if ((err = iosapic_init(phys_addr, gsi_base)))
885 return err;
886
887#ifdef CONFIG_ACPI_NUMA
888 acpi_map_iosapic(handle, 0, NULL, NULL);
889#endif
890
891 return 0;
892}
893
894EXPORT_SYMBOL(acpi_register_ioapic);
895
896int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
897{
898 return iosapic_remove(gsi_base);
899}
900
901EXPORT_SYMBOL(acpi_unregister_ioapic);
902
903
904
905
906
907
908int acpi_suspend_lowlevel(void) { return 0; }
909