1
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6
7
8#define pr_fmt(fmt) "ACPI: " fmt
9
10#include <linux/init.h>
11#include <linux/acpi.h>
12#include <linux/acpi_pmtmr.h>
13#include <linux/efi.h>
14#include <linux/cpumask.h>
15#include <linux/export.h>
16#include <linux/dmi.h>
17#include <linux/irq.h>
18#include <linux/slab.h>
19#include <linux/memblock.h>
20#include <linux/ioport.h>
21#include <linux/pci.h>
22#include <linux/efi-bgrt.h>
23#include <linux/serial_core.h>
24#include <linux/pgtable.h>
25
26#include <asm/e820/api.h>
27#include <asm/irqdomain.h>
28#include <asm/pci_x86.h>
29#include <asm/io_apic.h>
30#include <asm/apic.h>
31#include <asm/io.h>
32#include <asm/mpspec.h>
33#include <asm/smp.h>
34#include <asm/i8259.h>
35#include <asm/setup.h>
36
37#include "sleep.h"
38static int __initdata acpi_force = 0;
39int acpi_disabled;
40EXPORT_SYMBOL(acpi_disabled);
41
42#ifdef CONFIG_X86_64
43# include <asm/proto.h>
44#endif
45
46int acpi_noirq;
47static int acpi_nobgrt;
48int acpi_pci_disabled;
49EXPORT_SYMBOL(acpi_pci_disabled);
50
51int acpi_lapic;
52int acpi_ioapic;
53int acpi_strict;
54int acpi_disable_cmcff;
55
56
57u8 acpi_sci_flags __initdata;
58u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
59int acpi_skip_timer_override __initdata;
60int acpi_use_timer_override __initdata;
61int acpi_fix_pin2_polarity __initdata;
62
63#ifdef CONFIG_X86_LOCAL_APIC
64static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
65#endif
66
67#ifdef CONFIG_X86_IO_APIC
68
69
70
71
72
73
74
75
76
77
78
79static DEFINE_MUTEX(acpi_ioapic_lock);
80#endif
81
82
83
84
85
86
87
88
89
90enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
91
92
93
94
95
96
97static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
98 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
99};
100
101
102
103
104
105void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
106{
107
108 if (!phys || !size)
109 return NULL;
110
111 return early_memremap(phys, size);
112}
113
114void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
115{
116 if (!map || !size)
117 return;
118
119 early_memunmap(map, size);
120}
121
122#ifdef CONFIG_X86_LOCAL_APIC
123static int __init acpi_parse_madt(struct acpi_table_header *table)
124{
125 struct acpi_table_madt *madt = NULL;
126
127 if (!boot_cpu_has(X86_FEATURE_APIC))
128 return -EINVAL;
129
130 madt = (struct acpi_table_madt *)table;
131 if (!madt) {
132 pr_warn("Unable to map MADT\n");
133 return -ENODEV;
134 }
135
136 if (madt->address) {
137 acpi_lapic_addr = (u64) madt->address;
138
139 pr_debug("Local APIC address 0x%08x\n", madt->address);
140 }
141
142 default_acpi_madt_oem_check(madt->header.oem_id,
143 madt->header.oem_table_id);
144
145 return 0;
146}
147
148
149
150
151
152
153
154
155
156static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
157{
158 unsigned int ver = 0;
159 int cpu;
160
161 if (id >= MAX_LOCAL_APIC) {
162 pr_info("skipped apicid that is too big\n");
163 return -EINVAL;
164 }
165
166 if (!enabled) {
167 ++disabled_cpus;
168 return -EINVAL;
169 }
170
171 if (boot_cpu_physical_apicid != -1U)
172 ver = boot_cpu_apic_version;
173
174 cpu = generic_processor_info(id, ver);
175 if (cpu >= 0)
176 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
177
178 return cpu;
179}
180
181static int __init
182acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
183{
184 struct acpi_madt_local_x2apic *processor = NULL;
185#ifdef CONFIG_X86_X2APIC
186 u32 apic_id;
187 u8 enabled;
188#endif
189
190 processor = (struct acpi_madt_local_x2apic *)header;
191
192 if (BAD_MADT_ENTRY(processor, end))
193 return -EINVAL;
194
195 acpi_table_print_madt_entry(&header->common);
196
197#ifdef CONFIG_X86_X2APIC
198 apic_id = processor->local_apic_id;
199 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
200
201
202 if (apic_id == 0xffffffff)
203 return 0;
204
205
206
207
208
209
210
211
212 if (!apic->apic_id_valid(apic_id)) {
213 if (enabled)
214 pr_warn("x2apic entry ignored\n");
215 return 0;
216 }
217
218 acpi_register_lapic(apic_id, processor->uid, enabled);
219#else
220 pr_warn("x2apic entry ignored\n");
221#endif
222
223 return 0;
224}
225
226static int __init
227acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
228{
229 struct acpi_madt_local_apic *processor = NULL;
230
231 processor = (struct acpi_madt_local_apic *)header;
232
233 if (BAD_MADT_ENTRY(processor, end))
234 return -EINVAL;
235
236 acpi_table_print_madt_entry(&header->common);
237
238
239 if (processor->id == 0xff)
240 return 0;
241
242
243
244
245
246
247
248
249 acpi_register_lapic(processor->id,
250 processor->processor_id,
251 processor->lapic_flags & ACPI_MADT_ENABLED);
252
253 return 0;
254}
255
256static int __init
257acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
258{
259 struct acpi_madt_local_sapic *processor = NULL;
260
261 processor = (struct acpi_madt_local_sapic *)header;
262
263 if (BAD_MADT_ENTRY(processor, end))
264 return -EINVAL;
265
266 acpi_table_print_madt_entry(&header->common);
267
268 acpi_register_lapic((processor->id << 8) | processor->eid,
269 processor->processor_id,
270 processor->lapic_flags & ACPI_MADT_ENABLED);
271
272 return 0;
273}
274
275static int __init
276acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
277 const unsigned long end)
278{
279 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
280
281 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
282
283 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
284 return -EINVAL;
285
286 acpi_table_print_madt_entry(&header->common);
287
288 acpi_lapic_addr = lapic_addr_ovr->address;
289
290 return 0;
291}
292
293static int __init
294acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
295 const unsigned long end)
296{
297 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
298
299 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
300
301 if (BAD_MADT_ENTRY(x2apic_nmi, end))
302 return -EINVAL;
303
304 acpi_table_print_madt_entry(&header->common);
305
306 if (x2apic_nmi->lint != 1)
307 pr_warn("NMI not connected to LINT 1!\n");
308
309 return 0;
310}
311
312static int __init
313acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
314{
315 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
316
317 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
318
319 if (BAD_MADT_ENTRY(lapic_nmi, end))
320 return -EINVAL;
321
322 acpi_table_print_madt_entry(&header->common);
323
324 if (lapic_nmi->lint != 1)
325 pr_warn("NMI not connected to LINT 1!\n");
326
327 return 0;
328}
329
330#endif
331
332#ifdef CONFIG_X86_IO_APIC
333#define MP_ISA_BUS 0
334
335static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
336 u8 trigger, u32 gsi);
337
338static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
339 u32 gsi)
340{
341
342
343
344 if (bus_irq >= NR_IRQS_LEGACY) {
345 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
346 return;
347 }
348
349
350
351
352
353
354 if ((bus_irq == 0) && (trigger == 3))
355 trigger = 1;
356
357 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
358 return;
359
360
361
362
363
364 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
365 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
366 isa_irq_to_gsi[bus_irq] = gsi;
367}
368
369static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
370 int polarity)
371{
372#ifdef CONFIG_X86_MPPARSE
373 struct mpc_intsrc mp_irq;
374 struct pci_dev *pdev;
375 unsigned char number;
376 unsigned int devfn;
377 int ioapic;
378 u8 pin;
379
380 if (!acpi_ioapic)
381 return 0;
382 if (!dev || !dev_is_pci(dev))
383 return 0;
384
385 pdev = to_pci_dev(dev);
386 number = pdev->bus->number;
387 devfn = pdev->devfn;
388 pin = pdev->pin;
389
390 mp_irq.type = MP_INTSRC;
391 mp_irq.irqtype = mp_INT;
392 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
393 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
394 mp_irq.srcbus = number;
395 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
396 ioapic = mp_find_ioapic(gsi);
397 mp_irq.dstapic = mpc_ioapic_id(ioapic);
398 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
399
400 mp_save_irq(&mp_irq);
401#endif
402 return 0;
403}
404
405static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
406 u8 trigger, u32 gsi)
407{
408 struct mpc_intsrc mp_irq;
409 int ioapic, pin;
410
411
412 ioapic = mp_find_ioapic(gsi);
413 if (ioapic < 0) {
414 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
415 return ioapic;
416 }
417
418 pin = mp_find_ioapic_pin(ioapic, gsi);
419
420 mp_irq.type = MP_INTSRC;
421 mp_irq.irqtype = mp_INT;
422 mp_irq.irqflag = (trigger << 2) | polarity;
423 mp_irq.srcbus = MP_ISA_BUS;
424 mp_irq.srcbusirq = bus_irq;
425 mp_irq.dstapic = mpc_ioapic_id(ioapic);
426 mp_irq.dstirq = pin;
427
428 mp_save_irq(&mp_irq);
429
430 return 0;
431}
432
433static int __init
434acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
435{
436 struct acpi_madt_io_apic *ioapic = NULL;
437 struct ioapic_domain_cfg cfg = {
438 .type = IOAPIC_DOMAIN_DYNAMIC,
439 .ops = &mp_ioapic_irqdomain_ops,
440 };
441
442 ioapic = (struct acpi_madt_io_apic *)header;
443
444 if (BAD_MADT_ENTRY(ioapic, end))
445 return -EINVAL;
446
447 acpi_table_print_madt_entry(&header->common);
448
449
450 if (ioapic->global_irq_base < nr_legacy_irqs())
451 cfg.type = IOAPIC_DOMAIN_LEGACY;
452
453 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
454 &cfg);
455
456 return 0;
457}
458
459
460
461
462static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
463{
464 if (trigger == 0)
465 trigger = 3;
466
467 if (polarity == 0)
468 polarity = 3;
469
470
471 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
472 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
473
474 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
475 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
476
477 if (bus_irq < NR_IRQS_LEGACY)
478 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
479 else
480 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
481
482 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
483
484
485
486
487
488 acpi_sci_override_gsi = gsi;
489 return;
490}
491
492static int __init
493acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
494 const unsigned long end)
495{
496 struct acpi_madt_interrupt_override *intsrc = NULL;
497
498 intsrc = (struct acpi_madt_interrupt_override *)header;
499
500 if (BAD_MADT_ENTRY(intsrc, end))
501 return -EINVAL;
502
503 acpi_table_print_madt_entry(&header->common);
504
505 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
506 acpi_sci_ioapic_setup(intsrc->source_irq,
507 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
508 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
509 intsrc->global_irq);
510 return 0;
511 }
512
513 if (intsrc->source_irq == 0) {
514 if (acpi_skip_timer_override) {
515 pr_warn("BIOS IRQ0 override ignored.\n");
516 return 0;
517 }
518
519 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
520 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
521 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
522 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
523 }
524 }
525
526 mp_override_legacy_irq(intsrc->source_irq,
527 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
528 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
529 intsrc->global_irq);
530
531 return 0;
532}
533
534static int __init
535acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
536{
537 struct acpi_madt_nmi_source *nmi_src = NULL;
538
539 nmi_src = (struct acpi_madt_nmi_source *)header;
540
541 if (BAD_MADT_ENTRY(nmi_src, end))
542 return -EINVAL;
543
544 acpi_table_print_madt_entry(&header->common);
545
546
547
548 return 0;
549}
550
551#endif
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
568{
569 unsigned int mask = 1 << irq;
570 unsigned int old, new;
571
572
573 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
574
575
576
577
578
579
580 new = acpi_noirq ? old : 0;
581
582
583
584
585
586 switch (trigger) {
587 case 1:
588 new &= ~mask;
589 break;
590 case 3:
591 new |= mask;
592 break;
593 }
594
595 if (old == new)
596 return;
597
598 pr_warn("setting ELCR to %04x (from %04x)\n", new, old);
599 outb(new, PIC_ELCR1);
600 outb(new >> 8, PIC_ELCR2);
601}
602
603int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
604{
605 int rc, irq, trigger, polarity;
606
607 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
608 *irqp = gsi;
609 return 0;
610 }
611
612 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
613 if (rc)
614 return rc;
615
616 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
617 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
618 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
619 if (irq < 0)
620 return irq;
621
622 *irqp = irq;
623 return 0;
624}
625EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
626
627int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
628{
629 if (isa_irq < nr_legacy_irqs() &&
630 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
631 *gsi = isa_irq_to_gsi[isa_irq];
632 return 0;
633 }
634
635 return -1;
636}
637
638static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
639 int trigger, int polarity)
640{
641#ifdef CONFIG_PCI
642
643
644
645 if (trigger == ACPI_LEVEL_SENSITIVE)
646 elcr_set_level_irq(gsi);
647#endif
648
649 return gsi;
650}
651
652#ifdef CONFIG_X86_LOCAL_APIC
653static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
654 int trigger, int polarity)
655{
656 int irq = gsi;
657#ifdef CONFIG_X86_IO_APIC
658 int node;
659 struct irq_alloc_info info;
660
661 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
662 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
663 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
664 ioapic_set_alloc_attr(&info, node, trigger, polarity);
665
666 mutex_lock(&acpi_ioapic_lock);
667 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
668
669 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
670 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
671 mutex_unlock(&acpi_ioapic_lock);
672#endif
673
674 return irq;
675}
676
677static void acpi_unregister_gsi_ioapic(u32 gsi)
678{
679#ifdef CONFIG_X86_IO_APIC
680 int irq;
681
682 mutex_lock(&acpi_ioapic_lock);
683 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
684 if (irq > 0)
685 mp_unmap_irq(irq);
686 mutex_unlock(&acpi_ioapic_lock);
687#endif
688}
689#endif
690
691int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
692 int trigger, int polarity) = acpi_register_gsi_pic;
693void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
694
695#ifdef CONFIG_ACPI_SLEEP
696int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
697#else
698int (*acpi_suspend_lowlevel)(void);
699#endif
700
701
702
703
704
705int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
706{
707 return __acpi_register_gsi(dev, gsi, trigger, polarity);
708}
709EXPORT_SYMBOL_GPL(acpi_register_gsi);
710
711void acpi_unregister_gsi(u32 gsi)
712{
713 if (__acpi_unregister_gsi)
714 __acpi_unregister_gsi(gsi);
715}
716EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
717
718#ifdef CONFIG_X86_LOCAL_APIC
719static void __init acpi_set_irq_model_ioapic(void)
720{
721 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
722 __acpi_register_gsi = acpi_register_gsi_ioapic;
723 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
724 acpi_ioapic = 1;
725}
726#endif
727
728
729
730
731#ifdef CONFIG_ACPI_HOTPLUG_CPU
732#include <acpi/processor.h>
733
734static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
735{
736#ifdef CONFIG_ACPI_NUMA
737 int nid;
738
739 nid = acpi_get_node(handle);
740 if (nid != NUMA_NO_NODE) {
741 set_apicid_to_node(physid, nid);
742 numa_set_node(cpu, nid);
743 }
744#endif
745 return 0;
746}
747
748int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
749 int *pcpu)
750{
751 int cpu;
752
753 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
754 if (cpu < 0) {
755 pr_info("Unable to map lapic to logical cpu number\n");
756 return cpu;
757 }
758
759 acpi_processor_set_pdc(handle);
760 acpi_map_cpu2node(handle, cpu, physid);
761
762 *pcpu = cpu;
763 return 0;
764}
765EXPORT_SYMBOL(acpi_map_cpu);
766
767int acpi_unmap_cpu(int cpu)
768{
769#ifdef CONFIG_ACPI_NUMA
770 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
771#endif
772
773 per_cpu(x86_cpu_to_apicid, cpu) = -1;
774 set_cpu_present(cpu, false);
775 num_processors--;
776
777 return (0);
778}
779EXPORT_SYMBOL(acpi_unmap_cpu);
780#endif
781
782int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
783{
784 int ret = -ENOSYS;
785#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
786 int ioapic_id;
787 u64 addr;
788 struct ioapic_domain_cfg cfg = {
789 .type = IOAPIC_DOMAIN_DYNAMIC,
790 .ops = &mp_ioapic_irqdomain_ops,
791 };
792
793 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
794 if (ioapic_id < 0) {
795 unsigned long long uid;
796 acpi_status status;
797
798 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
799 NULL, &uid);
800 if (ACPI_FAILURE(status)) {
801 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
802 return -EINVAL;
803 }
804 ioapic_id = (int)uid;
805 }
806
807 mutex_lock(&acpi_ioapic_lock);
808 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
809 mutex_unlock(&acpi_ioapic_lock);
810#endif
811
812 return ret;
813}
814EXPORT_SYMBOL(acpi_register_ioapic);
815
816int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
817{
818 int ret = -ENOSYS;
819
820#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
821 mutex_lock(&acpi_ioapic_lock);
822 ret = mp_unregister_ioapic(gsi_base);
823 mutex_unlock(&acpi_ioapic_lock);
824#endif
825
826 return ret;
827}
828EXPORT_SYMBOL(acpi_unregister_ioapic);
829
830
831
832
833
834
835
836
837
838
839int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
840{
841 int ret = 0;
842
843#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
844 mutex_lock(&acpi_ioapic_lock);
845 ret = mp_ioapic_registered(gsi_base);
846 mutex_unlock(&acpi_ioapic_lock);
847#endif
848
849 return ret;
850}
851
852static int __init acpi_parse_sbf(struct acpi_table_header *table)
853{
854 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
855
856 sbf_port = sb->cmos_index;
857
858 return 0;
859}
860
861#ifdef CONFIG_HPET_TIMER
862#include <asm/hpet.h>
863
864static struct resource *hpet_res __initdata;
865
866static int __init acpi_parse_hpet(struct acpi_table_header *table)
867{
868 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
869
870 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
871 pr_warn("HPET timers must be located in memory.\n");
872 return -1;
873 }
874
875 hpet_address = hpet_tbl->address.address;
876 hpet_blockid = hpet_tbl->sequence;
877
878
879
880
881
882 if (!hpet_address) {
883 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address);
884 return 0;
885 }
886#ifdef CONFIG_X86_64
887
888
889
890
891
892 if (hpet_address == 0xfed0000000000000UL) {
893 if (!hpet_force_user) {
894 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n",
895 hpet_tbl->id);
896 hpet_address = 0;
897 return 0;
898 }
899 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n",
900 hpet_tbl->id);
901 hpet_address >>= 32;
902 }
903#endif
904 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address);
905
906
907
908
909
910#define HPET_RESOURCE_NAME_SIZE 9
911 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
912 SMP_CACHE_BYTES);
913 if (!hpet_res)
914 panic("%s: Failed to allocate %zu bytes\n", __func__,
915 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
916
917 hpet_res->name = (void *)&hpet_res[1];
918 hpet_res->flags = IORESOURCE_MEM;
919 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
920 hpet_tbl->sequence);
921
922 hpet_res->start = hpet_address;
923 hpet_res->end = hpet_address + (1 * 1024) - 1;
924
925 return 0;
926}
927
928
929
930
931
932static __init int hpet_insert_resource(void)
933{
934 if (!hpet_res)
935 return 1;
936
937 return insert_resource(&iomem_resource, hpet_res);
938}
939
940late_initcall(hpet_insert_resource);
941
942#else
943#define acpi_parse_hpet NULL
944#endif
945
946static int __init acpi_parse_fadt(struct acpi_table_header *table)
947{
948 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
949 pr_debug("no legacy devices present\n");
950 x86_platform.legacy.devices.pnpbios = 0;
951 }
952
953 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
954 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
955 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
956 pr_debug("i8042 controller is absent\n");
957 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
958 }
959
960 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
961 pr_debug("not registering RTC platform device\n");
962 x86_platform.legacy.rtc = 0;
963 }
964
965 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
966 pr_debug("probing for VGA not safe\n");
967 x86_platform.legacy.no_vga = 1;
968 }
969
970#ifdef CONFIG_X86_PM_TIMER
971
972 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
973
974 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
975 ACPI_ADR_SPACE_SYSTEM_IO)
976 return 0;
977
978 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
979
980
981
982
983
984 if (!pmtmr_ioport)
985 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
986 } else {
987
988 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
989 }
990 if (pmtmr_ioport)
991 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport);
992#endif
993 return 0;
994}
995
996#ifdef CONFIG_X86_LOCAL_APIC
997
998
999
1000
1001
1002static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1003{
1004 int count;
1005
1006 if (!boot_cpu_has(X86_FEATURE_APIC))
1007 return -ENODEV;
1008
1009
1010
1011
1012
1013
1014 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1015 acpi_parse_lapic_addr_ovr, 0);
1016 if (count < 0) {
1017 pr_err("Error parsing LAPIC address override entry\n");
1018 return count;
1019 }
1020
1021 register_lapic_address(acpi_lapic_addr);
1022
1023 return count;
1024}
1025
1026static int __init acpi_parse_madt_lapic_entries(void)
1027{
1028 int count;
1029 int x2count = 0;
1030 int ret;
1031 struct acpi_subtable_proc madt_proc[2];
1032
1033 if (!boot_cpu_has(X86_FEATURE_APIC))
1034 return -ENODEV;
1035
1036 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1037 acpi_parse_sapic, MAX_LOCAL_APIC);
1038
1039 if (!count) {
1040 memset(madt_proc, 0, sizeof(madt_proc));
1041 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1042 madt_proc[0].handler = acpi_parse_lapic;
1043 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1044 madt_proc[1].handler = acpi_parse_x2apic;
1045 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1046 sizeof(struct acpi_table_madt),
1047 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1048 if (ret < 0) {
1049 pr_err("Error parsing LAPIC/X2APIC entries\n");
1050 return ret;
1051 }
1052
1053 count = madt_proc[0].count;
1054 x2count = madt_proc[1].count;
1055 }
1056 if (!count && !x2count) {
1057 pr_err("No LAPIC entries present\n");
1058
1059 return -ENODEV;
1060 } else if (count < 0 || x2count < 0) {
1061 pr_err("Error parsing LAPIC entry\n");
1062
1063 return count;
1064 }
1065
1066 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1067 acpi_parse_x2apic_nmi, 0);
1068 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1069 acpi_parse_lapic_nmi, 0);
1070 if (count < 0 || x2count < 0) {
1071 pr_err("Error parsing LAPIC NMI entry\n");
1072
1073 return count;
1074 }
1075 return 0;
1076}
1077#endif
1078
1079#ifdef CONFIG_X86_IO_APIC
1080static void __init mp_config_acpi_legacy_irqs(void)
1081{
1082 int i;
1083 struct mpc_intsrc mp_irq;
1084
1085#ifdef CONFIG_EISA
1086
1087
1088
1089 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1090#endif
1091 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1092 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1093
1094
1095
1096
1097
1098 for (i = 0; i < nr_legacy_irqs(); i++) {
1099 int ioapic, pin;
1100 unsigned int dstapic;
1101 int idx;
1102 u32 gsi;
1103
1104
1105 if (acpi_isa_irq_to_gsi(i, &gsi))
1106 continue;
1107
1108
1109
1110
1111 ioapic = mp_find_ioapic(gsi);
1112 if (ioapic < 0)
1113 continue;
1114 pin = mp_find_ioapic_pin(ioapic, gsi);
1115 dstapic = mpc_ioapic_id(ioapic);
1116
1117 for (idx = 0; idx < mp_irq_entries; idx++) {
1118 struct mpc_intsrc *irq = mp_irqs + idx;
1119
1120
1121 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1122 break;
1123
1124
1125 if (irq->dstapic == dstapic && irq->dstirq == pin)
1126 break;
1127 }
1128
1129 if (idx != mp_irq_entries) {
1130 pr_debug("ACPI: IRQ%d used by override.\n", i);
1131 continue;
1132 }
1133
1134 mp_irq.type = MP_INTSRC;
1135 mp_irq.irqflag = 0;
1136 mp_irq.srcbus = MP_ISA_BUS;
1137 mp_irq.dstapic = dstapic;
1138 mp_irq.irqtype = mp_INT;
1139 mp_irq.srcbusirq = i;
1140 mp_irq.dstirq = pin;
1141
1142 mp_save_irq(&mp_irq);
1143 }
1144}
1145
1146
1147
1148
1149
1150static int __init acpi_parse_madt_ioapic_entries(void)
1151{
1152 int count;
1153
1154
1155
1156
1157
1158
1159
1160 if (acpi_disabled || acpi_noirq)
1161 return -ENODEV;
1162
1163 if (!boot_cpu_has(X86_FEATURE_APIC))
1164 return -ENODEV;
1165
1166
1167
1168
1169 if (skip_ioapic_setup) {
1170 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n");
1171 return -ENODEV;
1172 }
1173
1174 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1175 MAX_IO_APICS);
1176 if (!count) {
1177 pr_err("No IOAPIC entries present\n");
1178 return -ENODEV;
1179 } else if (count < 0) {
1180 pr_err("Error parsing IOAPIC entry\n");
1181 return count;
1182 }
1183
1184 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1185 acpi_parse_int_src_ovr, nr_irqs);
1186 if (count < 0) {
1187 pr_err("Error parsing interrupt source overrides entry\n");
1188
1189 return count;
1190 }
1191
1192
1193
1194
1195
1196
1197 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1198 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1199 acpi_gbl_FADT.sci_interrupt);
1200
1201
1202 mp_config_acpi_legacy_irqs();
1203
1204 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1205 acpi_parse_nmi_src, nr_irqs);
1206 if (count < 0) {
1207 pr_err("Error parsing NMI SRC entry\n");
1208
1209 return count;
1210 }
1211
1212 return 0;
1213}
1214#else
1215static inline int acpi_parse_madt_ioapic_entries(void)
1216{
1217 return -1;
1218}
1219#endif
1220
1221static void __init early_acpi_process_madt(void)
1222{
1223#ifdef CONFIG_X86_LOCAL_APIC
1224 int error;
1225
1226 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1227
1228
1229
1230
1231 error = early_acpi_parse_madt_lapic_addr_ovr();
1232 if (!error) {
1233 acpi_lapic = 1;
1234 smp_found_config = 1;
1235 }
1236 if (error == -EINVAL) {
1237
1238
1239
1240 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1241 disable_acpi();
1242 }
1243 }
1244#endif
1245}
1246
1247static void __init acpi_process_madt(void)
1248{
1249#ifdef CONFIG_X86_LOCAL_APIC
1250 int error;
1251
1252 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1253
1254
1255
1256
1257 error = acpi_parse_madt_lapic_entries();
1258 if (!error) {
1259 acpi_lapic = 1;
1260
1261
1262
1263
1264 mutex_lock(&acpi_ioapic_lock);
1265 error = acpi_parse_madt_ioapic_entries();
1266 mutex_unlock(&acpi_ioapic_lock);
1267 if (!error) {
1268 acpi_set_irq_model_ioapic();
1269
1270 smp_found_config = 1;
1271 }
1272 }
1273 if (error == -EINVAL) {
1274
1275
1276
1277 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1278 disable_acpi();
1279 }
1280 } else {
1281
1282
1283
1284
1285
1286 if (smp_found_config) {
1287 pr_warn("No APIC-table, disabling MPS\n");
1288 smp_found_config = 0;
1289 }
1290 }
1291
1292
1293
1294
1295
1296 if (acpi_lapic && acpi_ioapic)
1297 pr_info("Using ACPI (MADT) for SMP configuration information\n");
1298 else if (acpi_lapic)
1299 pr_info("Using ACPI for processor (LAPIC) configuration information\n");
1300#endif
1301 return;
1302}
1303
1304static int __init disable_acpi_irq(const struct dmi_system_id *d)
1305{
1306 if (!acpi_force) {
1307 pr_notice("%s detected: force use of acpi=noirq\n", d->ident);
1308 acpi_noirq_set();
1309 }
1310 return 0;
1311}
1312
1313static int __init disable_acpi_pci(const struct dmi_system_id *d)
1314{
1315 if (!acpi_force) {
1316 pr_notice("%s detected: force use of pci=noacpi\n", d->ident);
1317 acpi_disable_pci();
1318 }
1319 return 0;
1320}
1321
1322static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1323{
1324 if (!acpi_force) {
1325 pr_notice("%s detected: acpi off\n", d->ident);
1326 disable_acpi();
1327 } else {
1328 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n");
1329 }
1330 return 0;
1331}
1332
1333
1334
1335
1336static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1337{
1338 if (!acpi_skip_timer_override) {
1339 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1340 d->ident);
1341 acpi_skip_timer_override = 1;
1342 }
1343 return 0;
1344}
1345
1346
1347
1348
1349
1350
1351
1352
1353void __init acpi_generic_reduced_hw_init(void)
1354{
1355
1356
1357
1358
1359 x86_init.timers.timer_init = x86_init_noop;
1360 x86_init.irqs.pre_vector_init = x86_init_noop;
1361 legacy_pic = &null_legacy_pic;
1362}
1363
1364static void __init acpi_reduced_hw_init(void)
1365{
1366 if (acpi_gbl_reduced_hardware)
1367 x86_init.acpi.reduced_hw_early_init();
1368}
1369
1370
1371
1372
1373
1374static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1375
1376
1377
1378 {
1379 .callback = dmi_disable_acpi,
1380 .ident = "IBM Thinkpad",
1381 .matches = {
1382 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1383 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1384 },
1385 },
1386
1387
1388
1389
1390 {
1391 .callback = disable_acpi_irq,
1392 .ident = "ASUS A7V",
1393 .matches = {
1394 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1395 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1396
1397 DMI_MATCH(DMI_BIOS_VERSION,
1398 "ASUS A7V ACPI BIOS Revision 1007"),
1399 },
1400 },
1401 {
1402
1403
1404
1405
1406
1407
1408 .callback = disable_acpi_irq,
1409 .ident = "IBM Thinkpad 600 Series 2645",
1410 .matches = {
1411 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1412 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1413 },
1414 },
1415 {
1416 .callback = disable_acpi_irq,
1417 .ident = "IBM Thinkpad 600 Series 2646",
1418 .matches = {
1419 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1420 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1421 },
1422 },
1423
1424
1425
1426 {
1427 .callback = disable_acpi_pci,
1428 .ident = "ASUS PR-DLS",
1429 .matches = {
1430 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1431 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1432 DMI_MATCH(DMI_BIOS_VERSION,
1433 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1434 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1435 },
1436 },
1437 {
1438 .callback = disable_acpi_pci,
1439 .ident = "Acer TravelMate 36x Laptop",
1440 .matches = {
1441 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1442 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1443 },
1444 },
1445 {}
1446};
1447
1448
1449static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460 {
1461 .callback = dmi_ignore_irq0_timer_override,
1462 .ident = "HP nx6115 laptop",
1463 .matches = {
1464 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1465 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1466 },
1467 },
1468 {
1469 .callback = dmi_ignore_irq0_timer_override,
1470 .ident = "HP NX6125 laptop",
1471 .matches = {
1472 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1473 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1474 },
1475 },
1476 {
1477 .callback = dmi_ignore_irq0_timer_override,
1478 .ident = "HP NX6325 laptop",
1479 .matches = {
1480 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1481 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1482 },
1483 },
1484 {
1485 .callback = dmi_ignore_irq0_timer_override,
1486 .ident = "HP 6715b laptop",
1487 .matches = {
1488 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1489 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1490 },
1491 },
1492 {
1493 .callback = dmi_ignore_irq0_timer_override,
1494 .ident = "FUJITSU SIEMENS",
1495 .matches = {
1496 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1497 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1498 },
1499 },
1500 {}
1501};
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522void __init acpi_boot_table_init(void)
1523{
1524 dmi_check_system(acpi_dmi_table);
1525
1526
1527
1528
1529 if (acpi_disabled)
1530 return;
1531
1532
1533
1534
1535 if (acpi_locate_initial_tables())
1536 disable_acpi();
1537 else
1538 acpi_reserve_initial_tables();
1539}
1540
1541int __init early_acpi_boot_init(void)
1542{
1543 if (acpi_disabled)
1544 return 1;
1545
1546 acpi_table_init_complete();
1547
1548 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1549
1550
1551
1552
1553 if (acpi_blacklisted()) {
1554 if (acpi_force) {
1555 pr_warn("acpi=force override\n");
1556 } else {
1557 pr_warn("Disabling ACPI support\n");
1558 disable_acpi();
1559 return 1;
1560 }
1561 }
1562
1563
1564
1565
1566 early_acpi_process_madt();
1567
1568
1569
1570
1571 acpi_reduced_hw_init();
1572
1573 return 0;
1574}
1575
1576int __init acpi_boot_init(void)
1577{
1578
1579 dmi_check_system(acpi_dmi_table_late);
1580
1581
1582
1583
1584 if (acpi_disabled)
1585 return 1;
1586
1587 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1588
1589
1590
1591
1592 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1593
1594
1595
1596
1597 acpi_process_madt();
1598
1599 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1600 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1601 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1602
1603 if (!acpi_noirq)
1604 x86_init.pci.init = pci_acpi_init;
1605
1606
1607 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1608 return 0;
1609}
1610
1611static int __init parse_acpi(char *arg)
1612{
1613 if (!arg)
1614 return -EINVAL;
1615
1616
1617 if (strcmp(arg, "off") == 0) {
1618 disable_acpi();
1619 }
1620
1621 else if (strcmp(arg, "force") == 0) {
1622 acpi_force = 1;
1623 acpi_disabled = 0;
1624 }
1625
1626 else if (strcmp(arg, "strict") == 0) {
1627 acpi_strict = 1;
1628 }
1629
1630 else if (strcmp(arg, "rsdt") == 0) {
1631 acpi_gbl_do_not_use_xsdt = TRUE;
1632 }
1633
1634 else if (strcmp(arg, "noirq") == 0) {
1635 acpi_noirq_set();
1636 }
1637
1638 else if (strcmp(arg, "copy_dsdt") == 0) {
1639 acpi_gbl_copy_dsdt_locally = 1;
1640 }
1641
1642 else if (strcmp(arg, "nocmcff") == 0) {
1643 acpi_disable_cmcff = 1;
1644 } else {
1645
1646 return -EINVAL;
1647 }
1648 return 0;
1649}
1650early_param("acpi", parse_acpi);
1651
1652static int __init parse_acpi_bgrt(char *arg)
1653{
1654 acpi_nobgrt = true;
1655 return 0;
1656}
1657early_param("bgrt_disable", parse_acpi_bgrt);
1658
1659
1660static int __init parse_pci(char *arg)
1661{
1662 if (arg && strcmp(arg, "noacpi") == 0)
1663 acpi_disable_pci();
1664 return 0;
1665}
1666early_param("pci", parse_pci);
1667
1668int __init acpi_mps_check(void)
1669{
1670#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1671
1672 if (acpi_disabled || acpi_noirq) {
1673 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n");
1674 return 1;
1675 }
1676#endif
1677 return 0;
1678}
1679
1680#ifdef CONFIG_X86_IO_APIC
1681static int __init parse_acpi_skip_timer_override(char *arg)
1682{
1683 acpi_skip_timer_override = 1;
1684 return 0;
1685}
1686early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1687
1688static int __init parse_acpi_use_timer_override(char *arg)
1689{
1690 acpi_use_timer_override = 1;
1691 return 0;
1692}
1693early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1694#endif
1695
1696static int __init setup_acpi_sci(char *s)
1697{
1698 if (!s)
1699 return -EINVAL;
1700 if (!strcmp(s, "edge"))
1701 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1702 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1703 else if (!strcmp(s, "level"))
1704 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1705 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1706 else if (!strcmp(s, "high"))
1707 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1708 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1709 else if (!strcmp(s, "low"))
1710 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1711 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1712 else
1713 return -EINVAL;
1714 return 0;
1715}
1716early_param("acpi_sci", setup_acpi_sci);
1717
1718int __acpi_acquire_global_lock(unsigned int *lock)
1719{
1720 unsigned int old, new, val;
1721 do {
1722 old = *lock;
1723 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1724 val = cmpxchg(lock, old, new);
1725 } while (unlikely (val != old));
1726 return ((new & 0x3) < 3) ? -1 : 0;
1727}
1728
1729int __acpi_release_global_lock(unsigned int *lock)
1730{
1731 unsigned int old, new, val;
1732 do {
1733 old = *lock;
1734 new = old & ~0x3;
1735 val = cmpxchg(lock, old, new);
1736 } while (unlikely (val != old));
1737 return old & 0x1;
1738}
1739
1740void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1741{
1742 e820__range_add(addr, size, E820_TYPE_ACPI);
1743 e820__update_table_print();
1744}
1745
1746void x86_default_set_root_pointer(u64 addr)
1747{
1748 boot_params.acpi_rsdp_addr = addr;
1749}
1750
1751u64 x86_default_get_root_pointer(void)
1752{
1753 return boot_params.acpi_rsdp_addr;
1754}
1755