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35#include <linux/module.h>
36#include <linux/init.h>
37#include <linux/kernel.h>
38#include <linux/sched.h>
39#include <linux/smp.h>
40#include <linux/string.h>
41#include <linux/types.h>
42#include <linux/irq.h>
43#include <linux/acpi.h>
44#include <linux/efi.h>
45#include <linux/mmzone.h>
46#include <linux/nodemask.h>
47#include <asm/io.h>
48#include <asm/iosapic.h>
49#include <asm/machvec.h>
50#include <asm/page.h>
51#include <asm/system.h>
52#include <asm/numa.h>
53#include <asm/sal.h>
54#include <asm/cyclone.h>
55#include <asm/xen/hypervisor.h>
56
57#define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
60
61#define PREFIX "ACPI: "
62
63void (*pm_idle) (void);
64EXPORT_SYMBOL(pm_idle);
65void (*pm_power_off) (void);
66EXPORT_SYMBOL(pm_power_off);
67
68u32 acpi_rsdt_forced;
69unsigned int acpi_cpei_override;
70unsigned int acpi_cpei_phys_cpuid;
71
72unsigned long acpi_wakeup_address = 0;
73
74#ifdef CONFIG_IA64_GENERIC
75static unsigned long __init acpi_find_rsdp(void)
76{
77 unsigned long rsdp_phys = 0;
78
79 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
80 rsdp_phys = efi.acpi20;
81 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
82 printk(KERN_WARNING PREFIX
83 "v1.0/r0.71 tables no longer supported\n");
84 return rsdp_phys;
85}
86#endif
87
88const char __init *
89acpi_get_sysname(void)
90{
91#ifdef CONFIG_IA64_GENERIC
92 unsigned long rsdp_phys;
93 struct acpi_table_rsdp *rsdp;
94 struct acpi_table_xsdt *xsdt;
95 struct acpi_table_header *hdr;
96#ifdef CONFIG_DMAR
97 u64 i, nentries;
98#endif
99
100 rsdp_phys = acpi_find_rsdp();
101 if (!rsdp_phys) {
102 printk(KERN_ERR
103 "ACPI 2.0 RSDP not found, default to \"dig\"\n");
104 return "dig";
105 }
106
107 rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
108 if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
109 printk(KERN_ERR
110 "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
111 return "dig";
112 }
113
114 xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
115 hdr = &xsdt->header;
116 if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
117 printk(KERN_ERR
118 "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
119 return "dig";
120 }
121
122 if (!strcmp(hdr->oem_id, "HP")) {
123 return "hpzx1";
124 } else if (!strcmp(hdr->oem_id, "SGI")) {
125 if (!strcmp(hdr->oem_table_id + 4, "UV"))
126 return "uv";
127 else
128 return "sn2";
129 } else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
130 return "xen";
131 }
132
133#ifdef CONFIG_DMAR
134
135 nentries = (hdr->length - sizeof(*hdr)) /
136 sizeof(xsdt->table_offset_entry[0]);
137 for (i = 0; i < nentries; i++) {
138 hdr = __va(xsdt->table_offset_entry[i]);
139 if (strncmp(hdr->signature, ACPI_SIG_DMAR,
140 sizeof(ACPI_SIG_DMAR) - 1) == 0)
141 return "dig_vtd";
142 }
143#endif
144
145 return "dig";
146#else
147# if defined (CONFIG_IA64_HP_SIM)
148 return "hpsim";
149# elif defined (CONFIG_IA64_HP_ZX1)
150 return "hpzx1";
151# elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
152 return "hpzx1_swiotlb";
153# elif defined (CONFIG_IA64_SGI_SN2)
154 return "sn2";
155# elif defined (CONFIG_IA64_SGI_UV)
156 return "uv";
157# elif defined (CONFIG_IA64_DIG)
158 return "dig";
159# elif defined (CONFIG_IA64_XEN_GUEST)
160 return "xen";
161# elif defined(CONFIG_IA64_DIG_VTD)
162 return "dig_vtd";
163# else
164# error Unknown platform. Fix acpi.c.
165# endif
166#endif
167}
168
169#ifdef CONFIG_ACPI
170
171#define ACPI_MAX_PLATFORM_INTERRUPTS 256
172
173
174int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
175 [0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
176};
177
178enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;
179
180
181
182
183
184int acpi_request_vector(u32 int_type)
185{
186 int vector = -1;
187
188 if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
189
190 vector = platform_intr_list[int_type];
191 } else
192 printk(KERN_ERR
193 "acpi_request_vector(): invalid interrupt type\n");
194 return vector;
195}
196
197char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
198{
199 return __va(phys_addr);
200}
201
202void __init __acpi_unmap_table(char *map, unsigned long size)
203{
204}
205
206
207
208
209
210static int available_cpus __initdata;
211struct acpi_table_madt *acpi_madt __initdata;
212static u8 has_8259;
213
214static int __init
215acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
216 const unsigned long end)
217{
218 struct acpi_madt_local_apic_override *lapic;
219
220 lapic = (struct acpi_madt_local_apic_override *)header;
221
222 if (BAD_MADT_ENTRY(lapic, end))
223 return -EINVAL;
224
225 if (lapic->address) {
226 iounmap(ipi_base_addr);
227 ipi_base_addr = ioremap(lapic->address, 0);
228 }
229 return 0;
230}
231
232static int __init
233acpi_parse_lsapic(struct acpi_subtable_header * header, const unsigned long end)
234{
235 struct acpi_madt_local_sapic *lsapic;
236
237 lsapic = (struct acpi_madt_local_sapic *)header;
238
239
240
241 if (lsapic->lapic_flags & ACPI_MADT_ENABLED) {
242#ifdef CONFIG_SMP
243 smp_boot_data.cpu_phys_id[available_cpus] =
244 (lsapic->id << 8) | lsapic->eid;
245#endif
246 ++available_cpus;
247 }
248
249 total_cpus++;
250 return 0;
251}
252
253static int __init
254acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
255{
256 struct acpi_madt_local_apic_nmi *lacpi_nmi;
257
258 lacpi_nmi = (struct acpi_madt_local_apic_nmi *)header;
259
260 if (BAD_MADT_ENTRY(lacpi_nmi, end))
261 return -EINVAL;
262
263
264 return 0;
265}
266
267static int __init
268acpi_parse_iosapic(struct acpi_subtable_header * header, const unsigned long end)
269{
270 struct acpi_madt_io_sapic *iosapic;
271
272 iosapic = (struct acpi_madt_io_sapic *)header;
273
274 if (BAD_MADT_ENTRY(iosapic, end))
275 return -EINVAL;
276
277 return iosapic_init(iosapic->address, iosapic->global_irq_base);
278}
279
280static unsigned int __initdata acpi_madt_rev;
281
282static int __init
283acpi_parse_plat_int_src(struct acpi_subtable_header * header,
284 const unsigned long end)
285{
286 struct acpi_madt_interrupt_source *plintsrc;
287 int vector;
288
289 plintsrc = (struct acpi_madt_interrupt_source *)header;
290
291 if (BAD_MADT_ENTRY(plintsrc, end))
292 return -EINVAL;
293
294
295
296
297
298 vector = iosapic_register_platform_intr(plintsrc->type,
299 plintsrc->global_irq,
300 plintsrc->io_sapic_vector,
301 plintsrc->eid,
302 plintsrc->id,
303 ((plintsrc->inti_flags & ACPI_MADT_POLARITY_MASK) ==
304 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
305 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
306 ((plintsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
307 ACPI_MADT_TRIGGER_EDGE) ?
308 IOSAPIC_EDGE : IOSAPIC_LEVEL);
309
310 platform_intr_list[plintsrc->type] = vector;
311 if (acpi_madt_rev > 1) {
312 acpi_cpei_override = plintsrc->flags & ACPI_MADT_CPEI_OVERRIDE;
313 }
314
315
316
317
318 acpi_cpei_phys_cpuid = ((plintsrc->id << 8) | (plintsrc->eid)) & 0xffff;
319
320 return 0;
321}
322
323#ifdef CONFIG_HOTPLUG_CPU
324unsigned int can_cpei_retarget(void)
325{
326 extern int cpe_vector;
327 extern unsigned int force_cpei_retarget;
328
329
330
331
332
333
334 if (cpe_vector > 0) {
335 if (acpi_cpei_override || force_cpei_retarget)
336 return 1;
337 else
338 return 0;
339 }
340 return 1;
341}
342
343unsigned int is_cpu_cpei_target(unsigned int cpu)
344{
345 unsigned int logical_id;
346
347 logical_id = cpu_logical_id(acpi_cpei_phys_cpuid);
348
349 if (logical_id == cpu)
350 return 1;
351 else
352 return 0;
353}
354
355void set_cpei_target_cpu(unsigned int cpu)
356{
357 acpi_cpei_phys_cpuid = cpu_physical_id(cpu);
358}
359#endif
360
361unsigned int get_cpei_target_cpu(void)
362{
363 return acpi_cpei_phys_cpuid;
364}
365
366static int __init
367acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
368 const unsigned long end)
369{
370 struct acpi_madt_interrupt_override *p;
371
372 p = (struct acpi_madt_interrupt_override *)header;
373
374 if (BAD_MADT_ENTRY(p, end))
375 return -EINVAL;
376
377 iosapic_override_isa_irq(p->source_irq, p->global_irq,
378 ((p->inti_flags & ACPI_MADT_POLARITY_MASK) ==
379 ACPI_MADT_POLARITY_ACTIVE_HIGH) ?
380 IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
381 ((p->inti_flags & ACPI_MADT_TRIGGER_MASK) ==
382 ACPI_MADT_TRIGGER_EDGE) ?
383 IOSAPIC_EDGE : IOSAPIC_LEVEL);
384 return 0;
385}
386
387static int __init
388acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
389{
390 struct acpi_madt_nmi_source *nmi_src;
391
392 nmi_src = (struct acpi_madt_nmi_source *)header;
393
394 if (BAD_MADT_ENTRY(nmi_src, end))
395 return -EINVAL;
396
397
398 return 0;
399}
400
401static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
402{
403 if (!strncmp(oem_id, "IBM", 3) && (!strncmp(oem_table_id, "SERMOW", 6))) {
404
405
406
407
408
409
410 sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;
411
412 cyclone_setup();
413 }
414}
415
416static int __init acpi_parse_madt(struct acpi_table_header *table)
417{
418 if (!table)
419 return -EINVAL;
420
421 acpi_madt = (struct acpi_table_madt *)table;
422
423 acpi_madt_rev = acpi_madt->header.revision;
424
425
426#ifdef CONFIG_ITANIUM
427 has_8259 = 1;
428#else
429 has_8259 = acpi_madt->flags & ACPI_MADT_PCAT_COMPAT;
430#endif
431 iosapic_system_init(has_8259);
432
433
434
435 if (acpi_madt->address)
436 ipi_base_addr = ioremap(acpi_madt->address, 0);
437
438 printk(KERN_INFO PREFIX "Local APIC address %p\n", ipi_base_addr);
439
440 acpi_madt_oem_check(acpi_madt->header.oem_id,
441 acpi_madt->header.oem_table_id);
442
443 return 0;
444}
445
446#ifdef CONFIG_ACPI_NUMA
447
448#undef SLIT_DEBUG
449
450#define PXM_FLAG_LEN ((MAX_PXM_DOMAINS + 1)/32)
451
452static int __initdata srat_num_cpus;
453static u32 __devinitdata pxm_flag[PXM_FLAG_LEN];
454#define pxm_bit_set(bit) (set_bit(bit,(void *)pxm_flag))
455#define pxm_bit_test(bit) (test_bit(bit,(void *)pxm_flag))
456static struct acpi_table_slit __initdata *slit_table;
457cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
458
459static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
460{
461 int pxm;
462
463 pxm = pa->proximity_domain_lo;
464 if (ia64_platform_is("sn2"))
465 pxm += pa->proximity_domain_hi[0] << 8;
466 return pxm;
467}
468
469static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
470{
471 int pxm;
472
473 pxm = ma->proximity_domain;
474 if (!ia64_platform_is("sn2"))
475 pxm &= 0xff;
476
477 return pxm;
478}
479
480
481
482
483
484void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
485{
486 u32 len;
487
488 len = sizeof(struct acpi_table_header) + 8
489 + slit->locality_count * slit->locality_count;
490 if (slit->header.length != len) {
491 printk(KERN_ERR
492 "ACPI 2.0 SLIT: size mismatch: %d expected, %d actual\n",
493 len, slit->header.length);
494 return;
495 }
496 slit_table = slit;
497}
498
499void __init
500acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
501{
502 int pxm;
503
504 if (!(pa->flags & ACPI_SRAT_CPU_ENABLED))
505 return;
506
507 pxm = get_processor_proximity_domain(pa);
508
509
510 pxm_bit_set(pxm);
511
512 node_cpuid[srat_num_cpus].phys_id =
513 (pa->apic_id << 8) | (pa->local_sapic_eid);
514
515 node_cpuid[srat_num_cpus].nid = pxm;
516 cpu_set(srat_num_cpus, early_cpu_possible_map);
517 srat_num_cpus++;
518}
519
520void __init
521acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
522{
523 unsigned long paddr, size;
524 int pxm;
525 struct node_memblk_s *p, *q, *pend;
526
527 pxm = get_memory_proximity_domain(ma);
528
529
530 paddr = ma->base_address;
531 size = ma->length;
532
533
534 if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))
535 return;
536
537
538 pxm_bit_set(pxm);
539
540
541 pend = &node_memblk[num_node_memblks];
542 for (p = &node_memblk[0]; p < pend; p++) {
543 if (paddr < p->start_paddr)
544 break;
545 }
546 if (p < pend) {
547 for (q = pend - 1; q >= p; q--)
548 *(q + 1) = *q;
549 }
550 p->start_paddr = paddr;
551 p->size = size;
552 p->nid = pxm;
553 num_node_memblks++;
554}
555
556void __init acpi_numa_arch_fixup(void)
557{
558 int i, j, node_from, node_to;
559
560
561 if (srat_num_cpus == 0) {
562 node_set_online(0);
563 node_cpuid[0].phys_id = hard_smp_processor_id();
564 return;
565 }
566
567
568
569
570
571 nodes_clear(node_online_map);
572 for (i = 0; i < MAX_PXM_DOMAINS; i++) {
573 if (pxm_bit_test(i)) {
574 int nid = acpi_map_pxm_to_node(i);
575 node_set_online(nid);
576 }
577 }
578
579
580 for (i = 0; i < num_node_memblks; i++)
581 node_memblk[i].nid = pxm_to_node(node_memblk[i].nid);
582
583
584 for_each_online_node(i) {
585 int bank;
586
587 bank = 0;
588 for (j = 0; j < num_node_memblks; j++)
589 if (node_memblk[j].nid == i)
590 node_memblk[j].bank = bank++;
591 }
592
593
594 for_each_possible_early_cpu(i)
595 node_cpuid[i].nid = pxm_to_node(node_cpuid[i].nid);
596
597 printk(KERN_INFO "Number of logical nodes in system = %d\n",
598 num_online_nodes());
599 printk(KERN_INFO "Number of memory chunks in system = %d\n",
600 num_node_memblks);
601
602 if (!slit_table) {
603 for (i = 0; i < MAX_NUMNODES; i++)
604 for (j = 0; j < MAX_NUMNODES; j++)
605 node_distance(i, j) = i == j ? LOCAL_DISTANCE :
606 REMOTE_DISTANCE;
607 return;
608 }
609
610 memset(numa_slit, -1, sizeof(numa_slit));
611 for (i = 0; i < slit_table->locality_count; i++) {
612 if (!pxm_bit_test(i))
613 continue;
614 node_from = pxm_to_node(i);
615 for (j = 0; j < slit_table->locality_count; j++) {
616 if (!pxm_bit_test(j))
617 continue;
618 node_to = pxm_to_node(j);
619 node_distance(node_from, node_to) =
620 slit_table->entry[i * slit_table->locality_count + j];
621 }
622 }
623
624#ifdef SLIT_DEBUG
625 printk("ACPI 2.0 SLIT locality table:\n");
626 for_each_online_node(i) {
627 for_each_online_node(j)
628 printk("%03d ", node_distance(i, j));
629 printk("\n");
630 }
631#endif
632}
633#endif
634
635
636
637
638
639int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
640{
641 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
642 return gsi;
643
644 if (has_8259 && gsi < 16)
645 return isa_irq_to_vector(gsi);
646
647 return iosapic_register_intr(gsi,
648 (polarity ==
649 ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
650 IOSAPIC_POL_LOW,
651 (triggering ==
652 ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
653 IOSAPIC_LEVEL);
654}
655
656void acpi_unregister_gsi(u32 gsi)
657{
658 if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
659 return;
660
661 if (has_8259 && gsi < 16)
662 return;
663
664 iosapic_unregister_intr(gsi);
665}
666
667static int __init acpi_parse_fadt(struct acpi_table_header *table)
668{
669 struct acpi_table_header *fadt_header;
670 struct acpi_table_fadt *fadt;
671
672 if (!table)
673 return -EINVAL;
674
675 fadt_header = (struct acpi_table_header *)table;
676 if (fadt_header->revision != 3)
677 return -ENODEV;
678
679 fadt = (struct acpi_table_fadt *)fadt_header;
680
681 acpi_register_gsi(NULL, fadt->sci_interrupt, ACPI_LEVEL_SENSITIVE,
682 ACPI_ACTIVE_LOW);
683 return 0;
684}
685
686int __init early_acpi_boot_init(void)
687{
688 int ret;
689
690
691
692
693
694 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
695 printk(KERN_ERR PREFIX "Can't find MADT\n");
696 return 0;
697 }
698
699 ret = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
700 acpi_parse_lsapic, NR_CPUS);
701 if (ret < 1)
702 printk(KERN_ERR PREFIX
703 "Error parsing MADT - no LAPIC entries\n");
704
705 return 0;
706}
707
708
709
710int __init acpi_boot_init(void)
711{
712
713
714
715
716
717
718
719
720
721 if (acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
722 printk(KERN_ERR PREFIX "Can't find MADT\n");
723 goto skip_madt;
724 }
725
726
727
728 if (acpi_table_parse_madt
729 (ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, acpi_parse_lapic_addr_ovr, 0) < 0)
730 printk(KERN_ERR PREFIX
731 "Error parsing LAPIC address override entry\n");
732
733 if (acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0)
734 < 0)
735 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
736
737
738
739 if (acpi_table_parse_madt
740 (ACPI_MADT_TYPE_IO_SAPIC, acpi_parse_iosapic, NR_IOSAPICS) < 1) {
741 if (!ia64_platform_is("sn2"))
742 printk(KERN_ERR PREFIX
743 "Error parsing MADT - no IOSAPIC entries\n");
744 }
745
746
747
748 if (acpi_table_parse_madt
749 (ACPI_MADT_TYPE_INTERRUPT_SOURCE, acpi_parse_plat_int_src,
750 ACPI_MAX_PLATFORM_INTERRUPTS) < 0)
751 printk(KERN_ERR PREFIX
752 "Error parsing platform interrupt source entry\n");
753
754 if (acpi_table_parse_madt
755 (ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 0) < 0)
756 printk(KERN_ERR PREFIX
757 "Error parsing interrupt source overrides entry\n");
758
759 if (acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 0) < 0)
760 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
761 skip_madt:
762
763
764
765
766
767
768
769 if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt))
770 printk(KERN_ERR PREFIX "Can't find FADT\n");
771
772#ifdef CONFIG_SMP
773 if (available_cpus == 0) {
774 printk(KERN_INFO "ACPI: Found 0 CPUS; assuming 1\n");
775 printk(KERN_INFO "CPU 0 (0x%04x)", hard_smp_processor_id());
776 smp_boot_data.cpu_phys_id[available_cpus] =
777 hard_smp_processor_id();
778 available_cpus = 1;
779 }
780 smp_boot_data.cpu_count = available_cpus;
781
782 smp_build_cpu_map();
783# ifdef CONFIG_ACPI_NUMA
784 if (srat_num_cpus == 0) {
785 int cpu, i = 1;
786 for (cpu = 0; cpu < smp_boot_data.cpu_count; cpu++)
787 if (smp_boot_data.cpu_phys_id[cpu] !=
788 hard_smp_processor_id())
789 node_cpuid[i++].phys_id =
790 smp_boot_data.cpu_phys_id[cpu];
791 }
792# endif
793#endif
794#ifdef CONFIG_ACPI_NUMA
795 build_cpu_to_node_map();
796#endif
797
798 printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus,
799 total_cpus);
800 return 0;
801}
802
803int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
804{
805 int tmp;
806
807 if (has_8259 && gsi < 16)
808 *irq = isa_irq_to_vector(gsi);
809 else {
810 tmp = gsi_to_irq(gsi);
811 if (tmp == -1)
812 return -1;
813 *irq = tmp;
814 }
815 return 0;
816}
817
818
819
820
821#ifdef CONFIG_ACPI_HOTPLUG_CPU
822static
823int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
824{
825#ifdef CONFIG_ACPI_NUMA
826 int pxm_id;
827 int nid;
828
829 pxm_id = acpi_get_pxm(handle);
830
831
832
833
834
835
836
837 nid = acpi_map_pxm_to_node(pxm_id);
838 node_cpuid[cpu].phys_id = physid;
839 node_cpuid[cpu].nid = nid;
840#endif
841 return (0);
842}
843
844int additional_cpus __initdata = -1;
845
846static __init int setup_additional_cpus(char *s)
847{
848 if (s)
849 additional_cpus = simple_strtol(s, NULL, 0);
850
851 return 0;
852}
853
854early_param("additional_cpus", setup_additional_cpus);
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871__init void prefill_possible_map(void)
872{
873 int i;
874 int possible, disabled_cpus;
875
876 disabled_cpus = total_cpus - available_cpus;
877
878 if (additional_cpus == -1) {
879 if (disabled_cpus > 0)
880 additional_cpus = disabled_cpus;
881 else
882 additional_cpus = 0;
883 }
884
885 possible = available_cpus + additional_cpus;
886
887 if (possible > NR_CPUS)
888 possible = NR_CPUS;
889
890 printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
891 possible, max((possible - available_cpus), 0));
892
893 for (i = 0; i < possible; i++)
894 set_cpu_possible(i, true);
895}
896
897int acpi_map_lsapic(acpi_handle handle, int *pcpu)
898{
899 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
900 union acpi_object *obj;
901 struct acpi_madt_local_sapic *lsapic;
902 cpumask_t tmp_map;
903 int cpu, physid;
904
905 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
906 return -EINVAL;
907
908 if (!buffer.length || !buffer.pointer)
909 return -EINVAL;
910
911 obj = buffer.pointer;
912 if (obj->type != ACPI_TYPE_BUFFER)
913 {
914 kfree(buffer.pointer);
915 return -EINVAL;
916 }
917
918 lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
919
920 if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
921 (!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
922 kfree(buffer.pointer);
923 return -EINVAL;
924 }
925
926 physid = ((lsapic->id << 8) | (lsapic->eid));
927
928 kfree(buffer.pointer);
929 buffer.length = ACPI_ALLOCATE_BUFFER;
930 buffer.pointer = NULL;
931
932 cpumask_complement(&tmp_map, cpu_present_mask);
933 cpu = cpumask_first(&tmp_map);
934 if (cpu >= nr_cpu_ids)
935 return -EINVAL;
936
937 acpi_map_cpu2node(handle, cpu, physid);
938
939 cpu_set(cpu, cpu_present_map);
940 ia64_cpu_to_sapicid[cpu] = physid;
941
942 *pcpu = cpu;
943 return (0);
944}
945
946EXPORT_SYMBOL(acpi_map_lsapic);
947
948int acpi_unmap_lsapic(int cpu)
949{
950 ia64_cpu_to_sapicid[cpu] = -1;
951 cpu_clear(cpu, cpu_present_map);
952
953#ifdef CONFIG_ACPI_NUMA
954
955#endif
956
957 return (0);
958}
959
960EXPORT_SYMBOL(acpi_unmap_lsapic);
961#endif
962
963#ifdef CONFIG_ACPI_NUMA
964static acpi_status __devinit
965acpi_map_iosapic(acpi_handle handle, u32 depth, void *context, void **ret)
966{
967 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
968 union acpi_object *obj;
969 struct acpi_madt_io_sapic *iosapic;
970 unsigned int gsi_base;
971 int pxm, node;
972
973
974 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
975 return AE_OK;
976
977 if (!buffer.length || !buffer.pointer)
978 return AE_OK;
979
980 obj = buffer.pointer;
981 if (obj->type != ACPI_TYPE_BUFFER ||
982 obj->buffer.length < sizeof(*iosapic)) {
983 kfree(buffer.pointer);
984 return AE_OK;
985 }
986
987 iosapic = (struct acpi_madt_io_sapic *)obj->buffer.pointer;
988
989 if (iosapic->header.type != ACPI_MADT_TYPE_IO_SAPIC) {
990 kfree(buffer.pointer);
991 return AE_OK;
992 }
993
994 gsi_base = iosapic->global_irq_base;
995
996 kfree(buffer.pointer);
997
998
999
1000
1001
1002 pxm = acpi_get_pxm(handle);
1003 if (pxm < 0)
1004 return AE_OK;
1005
1006 node = pxm_to_node(pxm);
1007
1008 if (node >= MAX_NUMNODES || !node_online(node) ||
1009 cpumask_empty(cpumask_of_node(node)))
1010 return AE_OK;
1011
1012
1013 map_iosapic_to_node(gsi_base, node);
1014 return AE_OK;
1015}
1016
1017static int __init
1018acpi_map_iosapics (void)
1019{
1020 acpi_get_devices(NULL, acpi_map_iosapic, NULL, NULL);
1021 return 0;
1022}
1023
1024fs_initcall(acpi_map_iosapics);
1025#endif
1026
1027int __ref acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
1028{
1029 int err;
1030
1031 if ((err = iosapic_init(phys_addr, gsi_base)))
1032 return err;
1033
1034#ifdef CONFIG_ACPI_NUMA
1035 acpi_map_iosapic(handle, 0, NULL, NULL);
1036#endif
1037
1038 return 0;
1039}
1040
1041EXPORT_SYMBOL(acpi_register_ioapic);
1042
1043int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
1044{
1045 return iosapic_remove(gsi_base);
1046}
1047
1048EXPORT_SYMBOL(acpi_unregister_ioapic);
1049
1050
1051
1052
1053
1054
1055int acpi_save_state_mem(void) { return 0; }
1056
1057
1058
1059
1060void acpi_restore_state_mem(void) {}
1061
1062
1063
1064
1065void do_suspend_lowlevel(void) {}
1066
1067#endif
1068