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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 *
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
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" /* To include x86_acpi_suspend_lowlevel */
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 /* X86 */
45
46int acpi_noirq; /* skip ACPI IRQ initialization */
47static int acpi_nobgrt; /* skip ACPI BGRT */
48int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
49EXPORT_SYMBOL(acpi_pci_disabled);
50
51int acpi_lapic;
52int acpi_ioapic;
53int acpi_strict;
54int acpi_disable_cmcff;
55bool acpi_int_src_ovr[NR_IRQS_LEGACY];
56
57/* ACPI SCI override configuration */
58u8 acpi_sci_flags __initdata;
59u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
60int acpi_skip_timer_override __initdata;
61int acpi_use_timer_override __initdata;
62int acpi_fix_pin2_polarity __initdata;
63
64#ifdef CONFIG_X86_LOCAL_APIC
65static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
66static bool has_lapic_cpus __initdata;
67static bool acpi_support_online_capable;
68#endif
69
70#ifdef CONFIG_X86_IO_APIC
71/*
72 * Locks related to IOAPIC hotplug
73 * Hotplug side:
74 * ->device_hotplug_lock
75 * ->acpi_ioapic_lock
76 * ->ioapic_lock
77 * Interrupt mapping side:
78 * ->acpi_ioapic_lock
79 * ->ioapic_mutex
80 * ->ioapic_lock
81 */
82static DEFINE_MUTEX(acpi_ioapic_lock);
83#endif
84
85/* --------------------------------------------------------------------------
86 Boot-time Configuration
87 -------------------------------------------------------------------------- */
88
89/*
90 * The default interrupt routing model is PIC (8259). This gets
91 * overridden if IOAPICs are enumerated (below).
92 */
93enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
94
95
96/*
97 * ISA irqs by default are the first 16 gsis but can be
98 * any gsi as specified by an interrupt source override.
99 */
100static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
101 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
102};
103
104/*
105 * This is just a simple wrapper around early_memremap(),
106 * with sanity checks for phys == 0 and size == 0.
107 */
108void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
109{
110
111 if (!phys || !size)
112 return NULL;
113
114 return early_memremap(phys, size);
115}
116
117void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
118{
119 if (!map || !size)
120 return;
121
122 early_memunmap(map, size);
123}
124
125#ifdef CONFIG_X86_LOCAL_APIC
126static int __init acpi_parse_madt(struct acpi_table_header *table)
127{
128 struct acpi_table_madt *madt = NULL;
129
130 if (!boot_cpu_has(X86_FEATURE_APIC))
131 return -EINVAL;
132
133 madt = (struct acpi_table_madt *)table;
134 if (!madt) {
135 pr_warn("Unable to map MADT\n");
136 return -ENODEV;
137 }
138
139 if (madt->address) {
140 acpi_lapic_addr = (u64) madt->address;
141
142 pr_debug("Local APIC address 0x%08x\n", madt->address);
143 }
144
145 if (madt->flags & ACPI_MADT_PCAT_COMPAT)
146 legacy_pic_pcat_compat();
147
148 /* ACPI 6.3 and newer support the online capable bit. */
149 if (acpi_gbl_FADT.header.revision > 6 ||
150 (acpi_gbl_FADT.header.revision == 6 &&
151 acpi_gbl_FADT.minor_revision >= 3))
152 acpi_support_online_capable = true;
153
154 default_acpi_madt_oem_check(madt->header.oem_id,
155 madt->header.oem_table_id);
156
157 return 0;
158}
159
160static bool __init acpi_is_processor_usable(u32 lapic_flags)
161{
162 if (lapic_flags & ACPI_MADT_ENABLED)
163 return true;
164
165 if (!acpi_support_online_capable ||
166 (lapic_flags & ACPI_MADT_ONLINE_CAPABLE))
167 return true;
168
169 return false;
170}
171
172static int __init
173acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
174{
175 struct acpi_madt_local_x2apic *processor = NULL;
176#ifdef CONFIG_X86_X2APIC
177 u32 apic_id;
178 u8 enabled;
179#endif
180
181 processor = (struct acpi_madt_local_x2apic *)header;
182
183 if (BAD_MADT_ENTRY(processor, end))
184 return -EINVAL;
185
186 acpi_table_print_madt_entry(&header->common);
187
188#ifdef CONFIG_X86_X2APIC
189 apic_id = processor->local_apic_id;
190 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
191
192 /* Ignore invalid ID */
193 if (apic_id == 0xffffffff)
194 return 0;
195
196 /* don't register processors that cannot be onlined */
197 if (!acpi_is_processor_usable(processor->lapic_flags))
198 return 0;
199
200 /*
201 * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure
202 * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID
203 * in x2APIC must be equal or greater than 0xff.
204 */
205 if (has_lapic_cpus && apic_id < 0xff)
206 return 0;
207
208 /*
209 * We need to register disabled CPU as well to permit
210 * counting disabled CPUs. This allows us to size
211 * cpus_possible_map more accurately, to permit
212 * to not preallocating memory for all NR_CPUS
213 * when we use CPU hotplug.
214 */
215 if (!apic_id_valid(apic_id)) {
216 if (enabled)
217 pr_warn("x2apic entry ignored\n");
218 return 0;
219 }
220
221 topology_register_apic(apic_id, processor->uid, enabled);
222#else
223 pr_warn("x2apic entry ignored\n");
224#endif
225
226 return 0;
227}
228
229static int __init
230acpi_check_lapic(union acpi_subtable_headers *header, const unsigned long end)
231{
232 struct acpi_madt_local_apic *processor = NULL;
233
234 processor = (struct acpi_madt_local_apic *)header;
235
236 if (BAD_MADT_ENTRY(processor, end))
237 return -EINVAL;
238
239 /* Ignore invalid ID */
240 if (processor->id == 0xff)
241 return 0;
242
243 /* Ignore processors that can not be onlined */
244 if (!acpi_is_processor_usable(processor->lapic_flags))
245 return 0;
246
247 has_lapic_cpus = true;
248 return 0;
249}
250
251static int __init
252acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
253{
254 struct acpi_madt_local_apic *processor = NULL;
255
256 processor = (struct acpi_madt_local_apic *)header;
257
258 if (BAD_MADT_ENTRY(processor, end))
259 return -EINVAL;
260
261 acpi_table_print_madt_entry(&header->common);
262
263 /* Ignore invalid ID */
264 if (processor->id == 0xff)
265 return 0;
266
267 /* don't register processors that can not be onlined */
268 if (!acpi_is_processor_usable(processor->lapic_flags))
269 return 0;
270
271 /*
272 * We need to register disabled CPU as well to permit
273 * counting disabled CPUs. This allows us to size
274 * cpus_possible_map more accurately, to permit
275 * to not preallocating memory for all NR_CPUS
276 * when we use CPU hotplug.
277 */
278 topology_register_apic(processor->id, /* APIC ID */
279 processor->processor_id, /* ACPI ID */
280 processor->lapic_flags & ACPI_MADT_ENABLED);
281
282 return 0;
283}
284
285static int __init
286acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
287{
288 struct acpi_madt_local_sapic *processor = NULL;
289
290 processor = (struct acpi_madt_local_sapic *)header;
291
292 if (BAD_MADT_ENTRY(processor, end))
293 return -EINVAL;
294
295 acpi_table_print_madt_entry(&header->common);
296
297 topology_register_apic((processor->id << 8) | processor->eid,/* APIC ID */
298 processor->processor_id, /* ACPI ID */
299 processor->lapic_flags & ACPI_MADT_ENABLED);
300
301 return 0;
302}
303
304static int __init
305acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
306 const unsigned long end)
307{
308 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
309
310 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
311
312 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
313 return -EINVAL;
314
315 acpi_table_print_madt_entry(&header->common);
316
317 acpi_lapic_addr = lapic_addr_ovr->address;
318
319 return 0;
320}
321
322static int __init
323acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
324 const unsigned long end)
325{
326 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
327
328 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
329
330 if (BAD_MADT_ENTRY(x2apic_nmi, end))
331 return -EINVAL;
332
333 acpi_table_print_madt_entry(&header->common);
334
335 if (x2apic_nmi->lint != 1)
336 pr_warn("NMI not connected to LINT 1!\n");
337
338 return 0;
339}
340
341static int __init
342acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
343{
344 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
345
346 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
347
348 if (BAD_MADT_ENTRY(lapic_nmi, end))
349 return -EINVAL;
350
351 acpi_table_print_madt_entry(&header->common);
352
353 if (lapic_nmi->lint != 1)
354 pr_warn("NMI not connected to LINT 1!\n");
355
356 return 0;
357}
358#endif /* CONFIG_X86_LOCAL_APIC */
359
360#ifdef CONFIG_X86_IO_APIC
361#define MP_ISA_BUS 0
362
363static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
364 u8 trigger, u32 gsi);
365
366static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
367 u32 gsi)
368{
369 /*
370 * Check bus_irq boundary.
371 */
372 if (bus_irq >= NR_IRQS_LEGACY) {
373 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
374 return;
375 }
376
377 /*
378 * TBD: This check is for faulty timer entries, where the override
379 * erroneously sets the trigger to level, resulting in a HUGE
380 * increase of timer interrupts!
381 */
382 if ((bus_irq == 0) && (trigger == 3))
383 trigger = 1;
384
385 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
386 return;
387 /*
388 * Reset default identity mapping if gsi is also an legacy IRQ,
389 * otherwise there will be more than one entry with the same GSI
390 * and acpi_isa_irq_to_gsi() may give wrong result.
391 */
392 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
393 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
394 isa_irq_to_gsi[bus_irq] = gsi;
395}
396
397static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
398 int polarity)
399{
400#ifdef CONFIG_X86_MPPARSE
401 struct mpc_intsrc mp_irq;
402 struct pci_dev *pdev;
403 unsigned char number;
404 unsigned int devfn;
405 int ioapic;
406 u8 pin;
407
408 if (!acpi_ioapic)
409 return;
410 if (!dev || !dev_is_pci(dev))
411 return;
412
413 pdev = to_pci_dev(dev);
414 number = pdev->bus->number;
415 devfn = pdev->devfn;
416 pin = pdev->pin;
417 /* print the entry should happen on mptable identically */
418 mp_irq.type = MP_INTSRC;
419 mp_irq.irqtype = mp_INT;
420 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
421 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
422 mp_irq.srcbus = number;
423 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
424 ioapic = mp_find_ioapic(gsi);
425 mp_irq.dstapic = mpc_ioapic_id(ioapic);
426 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
427
428 mp_save_irq(&mp_irq);
429#endif
430}
431
432static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
433 u8 trigger, u32 gsi)
434{
435 struct mpc_intsrc mp_irq;
436 int ioapic, pin;
437
438 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
439 ioapic = mp_find_ioapic(gsi);
440 if (ioapic < 0) {
441 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
442 return ioapic;
443 }
444
445 pin = mp_find_ioapic_pin(ioapic, gsi);
446
447 mp_irq.type = MP_INTSRC;
448 mp_irq.irqtype = mp_INT;
449 mp_irq.irqflag = (trigger << 2) | polarity;
450 mp_irq.srcbus = MP_ISA_BUS;
451 mp_irq.srcbusirq = bus_irq;
452 mp_irq.dstapic = mpc_ioapic_id(ioapic);
453 mp_irq.dstirq = pin;
454
455 mp_save_irq(&mp_irq);
456
457 return 0;
458}
459
460static int __init
461acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
462{
463 struct acpi_madt_io_apic *ioapic = NULL;
464 struct ioapic_domain_cfg cfg = {
465 .type = IOAPIC_DOMAIN_DYNAMIC,
466 .ops = &mp_ioapic_irqdomain_ops,
467 };
468
469 ioapic = (struct acpi_madt_io_apic *)header;
470
471 if (BAD_MADT_ENTRY(ioapic, end))
472 return -EINVAL;
473
474 acpi_table_print_madt_entry(&header->common);
475
476 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
477 if (ioapic->global_irq_base < nr_legacy_irqs())
478 cfg.type = IOAPIC_DOMAIN_LEGACY;
479
480 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
481 &cfg);
482
483 return 0;
484}
485
486/*
487 * Parse Interrupt Source Override for the ACPI SCI
488 */
489static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
490{
491 if (trigger == 0) /* compatible SCI trigger is level */
492 trigger = 3;
493
494 if (polarity == 0) /* compatible SCI polarity is low */
495 polarity = 3;
496
497 /* Command-line over-ride via acpi_sci= */
498 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
499 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
500
501 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
502 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
503
504 if (bus_irq < NR_IRQS_LEGACY)
505 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
506 else
507 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
508
509 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
510
511 /*
512 * stash over-ride to indicate we've been here
513 * and for later update of acpi_gbl_FADT
514 */
515 acpi_sci_override_gsi = gsi;
516 return;
517}
518
519static int __init
520acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
521 const unsigned long end)
522{
523 struct acpi_madt_interrupt_override *intsrc = NULL;
524
525 intsrc = (struct acpi_madt_interrupt_override *)header;
526
527 if (BAD_MADT_ENTRY(intsrc, end))
528 return -EINVAL;
529
530 acpi_table_print_madt_entry(&header->common);
531
532 if (intsrc->source_irq < NR_IRQS_LEGACY)
533 acpi_int_src_ovr[intsrc->source_irq] = true;
534
535 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
536 acpi_sci_ioapic_setup(intsrc->source_irq,
537 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
538 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
539 intsrc->global_irq);
540 return 0;
541 }
542
543 if (intsrc->source_irq == 0) {
544 if (acpi_skip_timer_override) {
545 pr_warn("BIOS IRQ0 override ignored.\n");
546 return 0;
547 }
548
549 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
550 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
551 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
552 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
553 }
554 }
555
556 mp_override_legacy_irq(intsrc->source_irq,
557 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
558 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
559 intsrc->global_irq);
560
561 return 0;
562}
563
564static int __init
565acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
566{
567 struct acpi_madt_nmi_source *nmi_src = NULL;
568
569 nmi_src = (struct acpi_madt_nmi_source *)header;
570
571 if (BAD_MADT_ENTRY(nmi_src, end))
572 return -EINVAL;
573
574 acpi_table_print_madt_entry(&header->common);
575
576 /* TBD: Support nimsrc entries? */
577
578 return 0;
579}
580
581#endif /* CONFIG_X86_IO_APIC */
582
583/*
584 * acpi_pic_sci_set_trigger()
585 *
586 * use ELCR to set PIC-mode trigger type for SCI
587 *
588 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
589 * it may require Edge Trigger -- use "acpi_sci=edge"
590 *
591 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers
592 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
593 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
594 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
595 */
596
597void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
598{
599 unsigned int mask = 1 << irq;
600 unsigned int old, new;
601
602 /* Real old ELCR mask */
603 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
604
605 /*
606 * If we use ACPI to set PCI IRQs, then we should clear ELCR
607 * since we will set it correctly as we enable the PCI irq
608 * routing.
609 */
610 new = acpi_noirq ? old : 0;
611
612 /*
613 * Update SCI information in the ELCR, it isn't in the PCI
614 * routing tables..
615 */
616 switch (trigger) {
617 case 1: /* Edge - clear */
618 new &= ~mask;
619 break;
620 case 3: /* Level - set */
621 new |= mask;
622 break;
623 }
624
625 if (old == new)
626 return;
627
628 pr_warn("setting ELCR to %04x (from %04x)\n", new, old);
629 outb(new, PIC_ELCR1);
630 outb(new >> 8, PIC_ELCR2);
631}
632
633int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
634{
635 int rc, irq, trigger, polarity;
636
637 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
638 *irqp = gsi;
639 return 0;
640 }
641
642 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
643 if (rc)
644 return rc;
645
646 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
647 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
648 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
649 if (irq < 0)
650 return irq;
651
652 *irqp = irq;
653 return 0;
654}
655EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
656
657int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
658{
659 if (isa_irq < nr_legacy_irqs() &&
660 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
661 *gsi = isa_irq_to_gsi[isa_irq];
662 return 0;
663 }
664
665 return -1;
666}
667
668static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
669 int trigger, int polarity)
670{
671#ifdef CONFIG_PCI
672 /*
673 * Make sure all (legacy) PCI IRQs are set as level-triggered.
674 */
675 if (trigger == ACPI_LEVEL_SENSITIVE)
676 elcr_set_level_irq(gsi);
677#endif
678
679 return gsi;
680}
681
682#ifdef CONFIG_X86_LOCAL_APIC
683static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
684 int trigger, int polarity)
685{
686 int irq = gsi;
687#ifdef CONFIG_X86_IO_APIC
688 int node;
689 struct irq_alloc_info info;
690
691 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
692 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
693 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
694 ioapic_set_alloc_attr(&info, node, trigger, polarity);
695
696 mutex_lock(&acpi_ioapic_lock);
697 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
698 /* Don't set up the ACPI SCI because it's already set up */
699 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
700 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
701 mutex_unlock(&acpi_ioapic_lock);
702#endif
703
704 return irq;
705}
706
707static void acpi_unregister_gsi_ioapic(u32 gsi)
708{
709#ifdef CONFIG_X86_IO_APIC
710 int irq;
711
712 mutex_lock(&acpi_ioapic_lock);
713 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
714 if (irq > 0)
715 mp_unmap_irq(irq);
716 mutex_unlock(&acpi_ioapic_lock);
717#endif
718}
719#endif
720
721int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
722 int trigger, int polarity) = acpi_register_gsi_pic;
723void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
724
725#ifdef CONFIG_ACPI_SLEEP
726int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
727#else
728int (*acpi_suspend_lowlevel)(void);
729#endif
730
731/*
732 * success: return IRQ number (>=0)
733 * failure: return < 0
734 */
735int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
736{
737 return __acpi_register_gsi(dev, gsi, trigger, polarity);
738}
739EXPORT_SYMBOL_GPL(acpi_register_gsi);
740
741void acpi_unregister_gsi(u32 gsi)
742{
743 if (__acpi_unregister_gsi)
744 __acpi_unregister_gsi(gsi);
745}
746EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
747
748#ifdef CONFIG_X86_LOCAL_APIC
749static void __init acpi_set_irq_model_ioapic(void)
750{
751 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
752 __acpi_register_gsi = acpi_register_gsi_ioapic;
753 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
754 acpi_ioapic = 1;
755}
756#endif
757
758/*
759 * ACPI based hotplug support for CPU
760 */
761#ifdef CONFIG_ACPI_HOTPLUG_CPU
762#include <acpi/processor.h>
763
764static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
765{
766#ifdef CONFIG_ACPI_NUMA
767 int nid;
768
769 nid = acpi_get_node(handle);
770 if (nid != NUMA_NO_NODE) {
771 set_apicid_to_node(physid, nid);
772 numa_set_node(cpu, nid);
773 }
774#endif
775 return 0;
776}
777
778int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu)
779{
780 int cpu = topology_hotplug_apic(physid, acpi_id);
781
782 if (cpu < 0) {
783 pr_info("Unable to map lapic to logical cpu number\n");
784 return cpu;
785 }
786
787 acpi_processor_set_pdc(handle);
788 acpi_map_cpu2node(handle, cpu, physid);
789
790 *pcpu = cpu;
791 return 0;
792}
793EXPORT_SYMBOL(acpi_map_cpu);
794
795int acpi_unmap_cpu(int cpu)
796{
797#ifdef CONFIG_ACPI_NUMA
798 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
799#endif
800 topology_hotunplug_apic(cpu);
801 return 0;
802}
803EXPORT_SYMBOL(acpi_unmap_cpu);
804#endif /* CONFIG_ACPI_HOTPLUG_CPU */
805
806int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
807{
808 int ret = -ENOSYS;
809#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
810 int ioapic_id;
811 u64 addr;
812 struct ioapic_domain_cfg cfg = {
813 .type = IOAPIC_DOMAIN_DYNAMIC,
814 .ops = &mp_ioapic_irqdomain_ops,
815 };
816
817 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
818 if (ioapic_id < 0) {
819 unsigned long long uid;
820 acpi_status status;
821
822 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
823 NULL, &uid);
824 if (ACPI_FAILURE(status)) {
825 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
826 return -EINVAL;
827 }
828 ioapic_id = (int)uid;
829 }
830
831 mutex_lock(&acpi_ioapic_lock);
832 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
833 mutex_unlock(&acpi_ioapic_lock);
834#endif
835
836 return ret;
837}
838EXPORT_SYMBOL(acpi_register_ioapic);
839
840int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
841{
842 int ret = -ENOSYS;
843
844#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
845 mutex_lock(&acpi_ioapic_lock);
846 ret = mp_unregister_ioapic(gsi_base);
847 mutex_unlock(&acpi_ioapic_lock);
848#endif
849
850 return ret;
851}
852EXPORT_SYMBOL(acpi_unregister_ioapic);
853
854/**
855 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base
856 * has been registered
857 * @handle: ACPI handle of the IOAPIC device
858 * @gsi_base: GSI base associated with the IOAPIC
859 *
860 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
861 * with acpi_register_ioapic()/acpi_unregister_ioapic().
862 */
863int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
864{
865 int ret = 0;
866
867#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
868 mutex_lock(&acpi_ioapic_lock);
869 ret = mp_ioapic_registered(gsi_base);
870 mutex_unlock(&acpi_ioapic_lock);
871#endif
872
873 return ret;
874}
875
876static int __init acpi_parse_sbf(struct acpi_table_header *table)
877{
878 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
879
880 sbf_port = sb->cmos_index; /* Save CMOS port */
881
882 return 0;
883}
884
885#ifdef CONFIG_HPET_TIMER
886#include <asm/hpet.h>
887
888static struct resource *hpet_res __initdata;
889
890static int __init acpi_parse_hpet(struct acpi_table_header *table)
891{
892 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
893
894 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
895 pr_warn("HPET timers must be located in memory.\n");
896 return -1;
897 }
898
899 hpet_address = hpet_tbl->address.address;
900 hpet_blockid = hpet_tbl->sequence;
901
902 /*
903 * Some broken BIOSes advertise HPET at 0x0. We really do not
904 * want to allocate a resource there.
905 */
906 if (!hpet_address) {
907 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address);
908 return 0;
909 }
910#ifdef CONFIG_X86_64
911 /*
912 * Some even more broken BIOSes advertise HPET at
913 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
914 * some noise:
915 */
916 if (hpet_address == 0xfed0000000000000UL) {
917 if (!hpet_force_user) {
918 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n",
919 hpet_tbl->id);
920 hpet_address = 0;
921 return 0;
922 }
923 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n",
924 hpet_tbl->id);
925 hpet_address >>= 32;
926 }
927#endif
928 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address);
929
930 /*
931 * Allocate and initialize the HPET firmware resource for adding into
932 * the resource tree during the lateinit timeframe.
933 */
934#define HPET_RESOURCE_NAME_SIZE 9
935 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
936 SMP_CACHE_BYTES);
937 if (!hpet_res)
938 panic("%s: Failed to allocate %zu bytes\n", __func__,
939 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
940
941 hpet_res->name = (void *)&hpet_res[1];
942 hpet_res->flags = IORESOURCE_MEM;
943 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
944 hpet_tbl->sequence);
945
946 hpet_res->start = hpet_address;
947 hpet_res->end = hpet_address + (1 * 1024) - 1;
948
949 return 0;
950}
951
952/*
953 * hpet_insert_resource inserts the HPET resources used into the resource
954 * tree.
955 */
956static __init int hpet_insert_resource(void)
957{
958 if (!hpet_res)
959 return 1;
960
961 return insert_resource(&iomem_resource, hpet_res);
962}
963
964late_initcall(hpet_insert_resource);
965
966#else
967#define acpi_parse_hpet NULL
968#endif
969
970static int __init acpi_parse_fadt(struct acpi_table_header *table)
971{
972 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
973 pr_debug("no legacy devices present\n");
974 x86_platform.legacy.devices.pnpbios = 0;
975 }
976
977 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
978 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
979 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
980 pr_debug("i8042 controller is absent\n");
981 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
982 }
983
984 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
985 pr_debug("not registering RTC platform device\n");
986 x86_platform.legacy.rtc = 0;
987 }
988
989 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
990 pr_debug("probing for VGA not safe\n");
991 x86_platform.legacy.no_vga = 1;
992 }
993
994#ifdef CONFIG_X86_PM_TIMER
995 /* detect the location of the ACPI PM Timer */
996 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
997 /* FADT rev. 2 */
998 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
999 ACPI_ADR_SPACE_SYSTEM_IO)
1000 return 0;
1001
1002 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
1003 /*
1004 * "X" fields are optional extensions to the original V1.0
1005 * fields, so we must selectively expand V1.0 fields if the
1006 * corresponding X field is zero.
1007 */
1008 if (!pmtmr_ioport)
1009 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1010 } else {
1011 /* FADT rev. 1 */
1012 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1013 }
1014 if (pmtmr_ioport)
1015 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport);
1016#endif
1017 return 0;
1018}
1019
1020#ifdef CONFIG_X86_LOCAL_APIC
1021/*
1022 * Parse LAPIC entries in MADT
1023 * returns 0 on success, < 0 on error
1024 */
1025
1026static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1027{
1028 int count;
1029
1030 if (!boot_cpu_has(X86_FEATURE_APIC))
1031 return -ENODEV;
1032
1033 /*
1034 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1035 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1036 */
1037
1038 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1039 acpi_parse_lapic_addr_ovr, 0);
1040 if (count < 0) {
1041 pr_err("Error parsing LAPIC address override entry\n");
1042 return count;
1043 }
1044
1045 register_lapic_address(acpi_lapic_addr);
1046
1047 return count;
1048}
1049
1050static int __init acpi_parse_madt_lapic_entries(void)
1051{
1052 int count, x2count = 0;
1053 struct acpi_subtable_proc madt_proc[2];
1054 int ret;
1055
1056 if (!boot_cpu_has(X86_FEATURE_APIC))
1057 return -ENODEV;
1058
1059 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1060 acpi_parse_sapic, MAX_LOCAL_APIC);
1061
1062 if (!count) {
1063 /* Check if there are valid LAPIC entries */
1064 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_check_lapic, MAX_LOCAL_APIC);
1065
1066 /*
1067 * Enumerate the APIC IDs in the order that they appear in the
1068 * MADT, no matter LAPIC entry or x2APIC entry is used.
1069 */
1070 memset(madt_proc, 0, sizeof(madt_proc));
1071 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1072 madt_proc[0].handler = acpi_parse_lapic;
1073 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1074 madt_proc[1].handler = acpi_parse_x2apic;
1075 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1076 sizeof(struct acpi_table_madt),
1077 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1078 if (ret < 0) {
1079 pr_err("Error parsing LAPIC/X2APIC entries\n");
1080 return ret;
1081 }
1082 count = madt_proc[0].count;
1083 x2count = madt_proc[1].count;
1084 }
1085 if (!count && !x2count) {
1086 pr_err("No LAPIC entries present\n");
1087 /* TBD: Cleanup to allow fallback to MPS */
1088 return -ENODEV;
1089 } else if (count < 0 || x2count < 0) {
1090 pr_err("Error parsing LAPIC entry\n");
1091 /* TBD: Cleanup to allow fallback to MPS */
1092 return count;
1093 }
1094
1095 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1096 acpi_parse_x2apic_nmi, 0);
1097 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1098 acpi_parse_lapic_nmi, 0);
1099 if (count < 0 || x2count < 0) {
1100 pr_err("Error parsing LAPIC NMI entry\n");
1101 /* TBD: Cleanup to allow fallback to MPS */
1102 return count;
1103 }
1104 return 0;
1105}
1106#endif /* CONFIG_X86_LOCAL_APIC */
1107
1108#ifdef CONFIG_X86_IO_APIC
1109static void __init mp_config_acpi_legacy_irqs(void)
1110{
1111 int i;
1112 struct mpc_intsrc mp_irq;
1113
1114#ifdef CONFIG_EISA
1115 /*
1116 * Fabricate the legacy ISA bus (bus #31).
1117 */
1118 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1119#endif
1120 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1121 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1122
1123 /*
1124 * Use the default configuration for the IRQs 0-15. Unless
1125 * overridden by (MADT) interrupt source override entries.
1126 */
1127 for (i = 0; i < nr_legacy_irqs(); i++) {
1128 int ioapic, pin;
1129 unsigned int dstapic;
1130 int idx;
1131 u32 gsi;
1132
1133 /* Locate the gsi that irq i maps to. */
1134 if (acpi_isa_irq_to_gsi(i, &gsi))
1135 continue;
1136
1137 /*
1138 * Locate the IOAPIC that manages the ISA IRQ.
1139 */
1140 ioapic = mp_find_ioapic(gsi);
1141 if (ioapic < 0)
1142 continue;
1143 pin = mp_find_ioapic_pin(ioapic, gsi);
1144 dstapic = mpc_ioapic_id(ioapic);
1145
1146 for (idx = 0; idx < mp_irq_entries; idx++) {
1147 struct mpc_intsrc *irq = mp_irqs + idx;
1148
1149 /* Do we already have a mapping for this ISA IRQ? */
1150 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1151 break;
1152
1153 /* Do we already have a mapping for this IOAPIC pin */
1154 if (irq->dstapic == dstapic && irq->dstirq == pin)
1155 break;
1156 }
1157
1158 if (idx != mp_irq_entries) {
1159 pr_debug("ACPI: IRQ%d used by override.\n", i);
1160 continue; /* IRQ already used */
1161 }
1162
1163 mp_irq.type = MP_INTSRC;
1164 mp_irq.irqflag = 0; /* Conforming */
1165 mp_irq.srcbus = MP_ISA_BUS;
1166 mp_irq.dstapic = dstapic;
1167 mp_irq.irqtype = mp_INT;
1168 mp_irq.srcbusirq = i; /* Identity mapped */
1169 mp_irq.dstirq = pin;
1170
1171 mp_save_irq(&mp_irq);
1172 }
1173}
1174
1175/*
1176 * Parse IOAPIC related entries in MADT
1177 * returns 0 on success, < 0 on error
1178 */
1179static int __init acpi_parse_madt_ioapic_entries(void)
1180{
1181 int count;
1182
1183 /*
1184 * ACPI interpreter is required to complete interrupt setup,
1185 * so if it is off, don't enumerate the io-apics with ACPI.
1186 * If MPS is present, it will handle them,
1187 * otherwise the system will stay in PIC mode
1188 */
1189 if (acpi_disabled || acpi_noirq)
1190 return -ENODEV;
1191
1192 if (!boot_cpu_has(X86_FEATURE_APIC))
1193 return -ENODEV;
1194
1195 /*
1196 * if "noapic" boot option, don't look for IO-APICs
1197 */
1198 if (ioapic_is_disabled) {
1199 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n");
1200 return -ENODEV;
1201 }
1202
1203 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1204 MAX_IO_APICS);
1205 if (!count) {
1206 pr_err("No IOAPIC entries present\n");
1207 return -ENODEV;
1208 } else if (count < 0) {
1209 pr_err("Error parsing IOAPIC entry\n");
1210 return count;
1211 }
1212
1213 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1214 acpi_parse_int_src_ovr,
1215 irq_get_nr_irqs());
1216 if (count < 0) {
1217 pr_err("Error parsing interrupt source overrides entry\n");
1218 /* TBD: Cleanup to allow fallback to MPS */
1219 return count;
1220 }
1221
1222 /*
1223 * If BIOS did not supply an INT_SRC_OVR for the SCI
1224 * pretend we got one so we can set the SCI flags.
1225 * But ignore setting up SCI on hardware reduced platforms.
1226 */
1227 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1228 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1229 acpi_gbl_FADT.sci_interrupt);
1230
1231 /* Fill in identity legacy mappings where no override */
1232 mp_config_acpi_legacy_irqs();
1233
1234 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1235 acpi_parse_nmi_src,
1236 irq_get_nr_irqs());
1237 if (count < 0) {
1238 pr_err("Error parsing NMI SRC entry\n");
1239 /* TBD: Cleanup to allow fallback to MPS */
1240 return count;
1241 }
1242
1243 return 0;
1244}
1245#else
1246static inline int acpi_parse_madt_ioapic_entries(void)
1247{
1248 return -1;
1249}
1250#endif /* !CONFIG_X86_IO_APIC */
1251
1252static void __init early_acpi_process_madt(void)
1253{
1254#ifdef CONFIG_X86_LOCAL_APIC
1255 int error;
1256
1257 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1258
1259 /*
1260 * Parse MADT LAPIC entries
1261 */
1262 error = early_acpi_parse_madt_lapic_addr_ovr();
1263 if (!error) {
1264 acpi_lapic = 1;
1265 smp_found_config = 1;
1266 }
1267 if (error == -EINVAL) {
1268 /*
1269 * Dell Precision Workstation 410, 610 come here.
1270 */
1271 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1272 disable_acpi();
1273 }
1274 }
1275#endif
1276}
1277
1278static void __init acpi_process_madt(void)
1279{
1280#ifdef CONFIG_X86_LOCAL_APIC
1281 int error;
1282
1283 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1284
1285 /*
1286 * Parse MADT LAPIC entries
1287 */
1288 error = acpi_parse_madt_lapic_entries();
1289 if (!error) {
1290 acpi_lapic = 1;
1291
1292 /*
1293 * Parse MADT IO-APIC entries
1294 */
1295 mutex_lock(&acpi_ioapic_lock);
1296 error = acpi_parse_madt_ioapic_entries();
1297 mutex_unlock(&acpi_ioapic_lock);
1298 if (!error) {
1299 acpi_set_irq_model_ioapic();
1300
1301 smp_found_config = 1;
1302 }
1303
1304#ifdef CONFIG_ACPI_MADT_WAKEUP
1305 /*
1306 * Parse MADT MP Wake entry.
1307 */
1308 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP,
1309 acpi_parse_mp_wake, 1);
1310#endif
1311 }
1312 if (error == -EINVAL) {
1313 /*
1314 * Dell Precision Workstation 410, 610 come here.
1315 */
1316 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1317 disable_acpi();
1318 }
1319 } else {
1320 /*
1321 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1322 * In the event an MPS table was found, forget it.
1323 * Boot with "acpi=off" to use MPS on such a system.
1324 */
1325 if (smp_found_config) {
1326 pr_warn("No APIC-table, disabling MPS\n");
1327 smp_found_config = 0;
1328 }
1329 }
1330
1331 /*
1332 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1333 * processors, where MPS only supports physical.
1334 */
1335 if (acpi_lapic && acpi_ioapic)
1336 pr_info("Using ACPI (MADT) for SMP configuration information\n");
1337 else if (acpi_lapic)
1338 pr_info("Using ACPI for processor (LAPIC) configuration information\n");
1339#endif
1340 return;
1341}
1342
1343static int __init disable_acpi_irq(const struct dmi_system_id *d)
1344{
1345 if (!acpi_force) {
1346 pr_notice("%s detected: force use of acpi=noirq\n", d->ident);
1347 acpi_noirq_set();
1348 }
1349 return 0;
1350}
1351
1352static int __init disable_acpi_pci(const struct dmi_system_id *d)
1353{
1354 if (!acpi_force) {
1355 pr_notice("%s detected: force use of pci=noacpi\n", d->ident);
1356 acpi_disable_pci();
1357 }
1358 return 0;
1359}
1360
1361static int __init disable_acpi_xsdt(const struct dmi_system_id *d)
1362{
1363 if (!acpi_force) {
1364 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident);
1365 acpi_gbl_do_not_use_xsdt = TRUE;
1366 } else {
1367 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n");
1368 }
1369 return 0;
1370}
1371
1372static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1373{
1374 if (!acpi_force) {
1375 pr_notice("%s detected: acpi off\n", d->ident);
1376 disable_acpi();
1377 } else {
1378 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n");
1379 }
1380 return 0;
1381}
1382
1383/*
1384 * Force ignoring BIOS IRQ0 override
1385 */
1386static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1387{
1388 if (!acpi_skip_timer_override) {
1389 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1390 d->ident);
1391 acpi_skip_timer_override = 1;
1392 }
1393 return 0;
1394}
1395
1396/*
1397 * ACPI offers an alternative platform interface model that removes
1398 * ACPI hardware requirements for platforms that do not implement
1399 * the PC Architecture.
1400 *
1401 * We initialize the Hardware-reduced ACPI model here:
1402 */
1403void __init acpi_generic_reduced_hw_init(void)
1404{
1405 /*
1406 * Override x86_init functions and bypass legacy PIC in
1407 * hardware reduced ACPI mode.
1408 */
1409 x86_init.timers.timer_init = x86_init_noop;
1410 x86_init.irqs.pre_vector_init = x86_init_noop;
1411 legacy_pic = &null_legacy_pic;
1412}
1413
1414static void __init acpi_reduced_hw_init(void)
1415{
1416 if (acpi_gbl_reduced_hardware)
1417 x86_init.acpi.reduced_hw_early_init();
1418}
1419
1420/*
1421 * If your system is blacklisted here, but you find that acpi=force
1422 * works for you, please contact linux-acpi@vger.kernel.org
1423 */
1424static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1425 /*
1426 * Boxes that need ACPI disabled
1427 */
1428 {
1429 .callback = dmi_disable_acpi,
1430 .ident = "IBM Thinkpad",
1431 .matches = {
1432 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1433 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1434 },
1435 },
1436
1437 /*
1438 * Boxes that need ACPI PCI IRQ routing disabled
1439 */
1440 {
1441 .callback = disable_acpi_irq,
1442 .ident = "ASUS A7V",
1443 .matches = {
1444 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1445 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1446 /* newer BIOS, Revision 1011, does work */
1447 DMI_MATCH(DMI_BIOS_VERSION,
1448 "ASUS A7V ACPI BIOS Revision 1007"),
1449 },
1450 },
1451 {
1452 /*
1453 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1454 * for LPC bridge, which is needed for the PCI
1455 * interrupt links to work. DSDT fix is in bug 5966.
1456 * 2645, 2646 model numbers are shared with 600/600E/600X
1457 */
1458 .callback = disable_acpi_irq,
1459 .ident = "IBM Thinkpad 600 Series 2645",
1460 .matches = {
1461 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1462 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1463 },
1464 },
1465 {
1466 .callback = disable_acpi_irq,
1467 .ident = "IBM Thinkpad 600 Series 2646",
1468 .matches = {
1469 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1470 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1471 },
1472 },
1473 /*
1474 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1475 */
1476 { /* _BBN 0 bug */
1477 .callback = disable_acpi_pci,
1478 .ident = "ASUS PR-DLS",
1479 .matches = {
1480 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1481 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1482 DMI_MATCH(DMI_BIOS_VERSION,
1483 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1484 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1485 },
1486 },
1487 {
1488 .callback = disable_acpi_pci,
1489 .ident = "Acer TravelMate 36x Laptop",
1490 .matches = {
1491 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1492 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1493 },
1494 },
1495 /*
1496 * Boxes that need ACPI XSDT use disabled due to corrupted tables
1497 */
1498 {
1499 .callback = disable_acpi_xsdt,
1500 .ident = "Advantech DAC-BJ01",
1501 .matches = {
1502 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1503 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"),
1504 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"),
1505 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"),
1506 },
1507 },
1508 {}
1509};
1510
1511/* second table for DMI checks that should run after early-quirks */
1512static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1513 /*
1514 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1515 * which includes some code which overrides all temperature
1516 * trip points to 16C if the INTIN2 input of the I/O APIC
1517 * is enabled. This input is incorrectly designated the
1518 * ISA IRQ 0 via an interrupt source override even though
1519 * it is wired to the output of the master 8259A and INTIN0
1520 * is not connected at all. Force ignoring BIOS IRQ0
1521 * override in that cases.
1522 */
1523 {
1524 .callback = dmi_ignore_irq0_timer_override,
1525 .ident = "HP nx6115 laptop",
1526 .matches = {
1527 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1528 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1529 },
1530 },
1531 {
1532 .callback = dmi_ignore_irq0_timer_override,
1533 .ident = "HP NX6125 laptop",
1534 .matches = {
1535 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1536 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1537 },
1538 },
1539 {
1540 .callback = dmi_ignore_irq0_timer_override,
1541 .ident = "HP NX6325 laptop",
1542 .matches = {
1543 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1544 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1545 },
1546 },
1547 {
1548 .callback = dmi_ignore_irq0_timer_override,
1549 .ident = "HP 6715b laptop",
1550 .matches = {
1551 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1552 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1553 },
1554 },
1555 {
1556 .callback = dmi_ignore_irq0_timer_override,
1557 .ident = "FUJITSU SIEMENS",
1558 .matches = {
1559 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1560 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1561 },
1562 },
1563 {}
1564};
1565
1566/*
1567 * acpi_boot_table_init() and acpi_boot_init()
1568 * called from setup_arch(), always.
1569 * 1. checksums all tables
1570 * 2. enumerates lapics
1571 * 3. enumerates io-apics
1572 *
1573 * acpi_table_init() is separate to allow reading SRAT without
1574 * other side effects.
1575 *
1576 * side effects of acpi_boot_init:
1577 * acpi_lapic = 1 if LAPIC found
1578 * acpi_ioapic = 1 if IOAPIC found
1579 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1580 * if acpi_blacklisted() acpi_disabled = 1;
1581 * acpi_irq_model=...
1582 * ...
1583 */
1584
1585void __init acpi_boot_table_init(void)
1586{
1587 dmi_check_system(acpi_dmi_table);
1588
1589 /*
1590 * If acpi_disabled, bail out
1591 */
1592 if (acpi_disabled)
1593 return;
1594
1595 /*
1596 * Initialize the ACPI boot-time table parser.
1597 */
1598 if (acpi_locate_initial_tables())
1599 disable_acpi();
1600 else
1601 acpi_reserve_initial_tables();
1602}
1603
1604int __init early_acpi_boot_init(void)
1605{
1606 if (acpi_disabled)
1607 return 1;
1608
1609 acpi_table_init_complete();
1610
1611 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1612
1613 /*
1614 * blacklist may disable ACPI entirely
1615 */
1616 if (acpi_blacklisted()) {
1617 if (acpi_force) {
1618 pr_warn("acpi=force override\n");
1619 } else {
1620 pr_warn("Disabling ACPI support\n");
1621 disable_acpi();
1622 return 1;
1623 }
1624 }
1625
1626 /*
1627 * Process the Multiple APIC Description Table (MADT), if present
1628 */
1629 early_acpi_process_madt();
1630
1631 /*
1632 * Hardware-reduced ACPI mode initialization:
1633 */
1634 acpi_reduced_hw_init();
1635
1636 return 0;
1637}
1638
1639int __init acpi_boot_init(void)
1640{
1641 /* those are executed after early-quirks are executed */
1642 dmi_check_system(acpi_dmi_table_late);
1643
1644 /*
1645 * If acpi_disabled, bail out
1646 */
1647 if (acpi_disabled)
1648 return 1;
1649
1650 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1651
1652 /*
1653 * set sci_int and PM timer address
1654 */
1655 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1656
1657 /*
1658 * Process the Multiple APIC Description Table (MADT), if present
1659 */
1660 acpi_process_madt();
1661
1662 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1663 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1664 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1665
1666 if (!acpi_noirq)
1667 x86_init.pci.init = pci_acpi_init;
1668
1669 /* Do not enable ACPI SPCR console by default */
1670 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1671 return 0;
1672}
1673
1674static int __init parse_acpi(char *arg)
1675{
1676 if (!arg)
1677 return -EINVAL;
1678
1679 /* "acpi=off" disables both ACPI table parsing and interpreter */
1680 if (strcmp(arg, "off") == 0) {
1681 disable_acpi();
1682 }
1683 /* acpi=force to over-ride black-list */
1684 else if (strcmp(arg, "force") == 0) {
1685 acpi_force = 1;
1686 acpi_disabled = 0;
1687 }
1688 /* acpi=strict disables out-of-spec workarounds */
1689 else if (strcmp(arg, "strict") == 0) {
1690 acpi_strict = 1;
1691 }
1692 /* acpi=rsdt use RSDT instead of XSDT */
1693 else if (strcmp(arg, "rsdt") == 0) {
1694 acpi_gbl_do_not_use_xsdt = TRUE;
1695 }
1696 /* "acpi=noirq" disables ACPI interrupt routing */
1697 else if (strcmp(arg, "noirq") == 0) {
1698 acpi_noirq_set();
1699 }
1700 /* "acpi=copy_dsdt" copies DSDT */
1701 else if (strcmp(arg, "copy_dsdt") == 0) {
1702 acpi_gbl_copy_dsdt_locally = 1;
1703 }
1704 /* "acpi=nocmcff" disables FF mode for corrected errors */
1705 else if (strcmp(arg, "nocmcff") == 0) {
1706 acpi_disable_cmcff = 1;
1707 } else {
1708 /* Core will printk when we return error. */
1709 return -EINVAL;
1710 }
1711 return 0;
1712}
1713early_param("acpi", parse_acpi);
1714
1715static int __init parse_acpi_bgrt(char *arg)
1716{
1717 acpi_nobgrt = true;
1718 return 0;
1719}
1720early_param("bgrt_disable", parse_acpi_bgrt);
1721
1722/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1723static int __init parse_pci(char *arg)
1724{
1725 if (arg && strcmp(arg, "noacpi") == 0)
1726 acpi_disable_pci();
1727 return 0;
1728}
1729early_param("pci", parse_pci);
1730
1731int __init acpi_mps_check(void)
1732{
1733#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1734/* mptable code is not built-in*/
1735 if (acpi_disabled || acpi_noirq) {
1736 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n");
1737 return 1;
1738 }
1739#endif
1740 return 0;
1741}
1742
1743#ifdef CONFIG_X86_IO_APIC
1744static int __init parse_acpi_skip_timer_override(char *arg)
1745{
1746 acpi_skip_timer_override = 1;
1747 return 0;
1748}
1749early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1750
1751static int __init parse_acpi_use_timer_override(char *arg)
1752{
1753 acpi_use_timer_override = 1;
1754 return 0;
1755}
1756early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1757#endif /* CONFIG_X86_IO_APIC */
1758
1759static int __init setup_acpi_sci(char *s)
1760{
1761 if (!s)
1762 return -EINVAL;
1763 if (!strcmp(s, "edge"))
1764 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1765 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1766 else if (!strcmp(s, "level"))
1767 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1768 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1769 else if (!strcmp(s, "high"))
1770 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1771 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1772 else if (!strcmp(s, "low"))
1773 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1774 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1775 else
1776 return -EINVAL;
1777 return 0;
1778}
1779early_param("acpi_sci", setup_acpi_sci);
1780
1781int __acpi_acquire_global_lock(unsigned int *lock)
1782{
1783 unsigned int old, new, val;
1784
1785 old = READ_ONCE(*lock);
1786 do {
1787 val = (old >> 1) & 0x1;
1788 new = (old & ~0x3) + 2 + val;
1789 } while (!try_cmpxchg(lock, &old, new));
1790
1791 if (val)
1792 return 0;
1793
1794 return -1;
1795}
1796
1797int __acpi_release_global_lock(unsigned int *lock)
1798{
1799 unsigned int old, new;
1800
1801 old = READ_ONCE(*lock);
1802 do {
1803 new = old & ~0x3;
1804 } while (!try_cmpxchg(lock, &old, new));
1805 return old & 0x1;
1806}
1807
1808void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1809{
1810 e820__range_add(addr, size, E820_TYPE_NVS);
1811 e820__update_table_print();
1812}
1813
1814void x86_default_set_root_pointer(u64 addr)
1815{
1816 boot_params.acpi_rsdp_addr = addr;
1817}
1818
1819u64 x86_default_get_root_pointer(void)
1820{
1821 return boot_params.acpi_rsdp_addr;
1822}
1823
1824#ifdef CONFIG_XEN_PV
1825void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
1826{
1827 return ioremap_cache(phys, size);
1828}
1829
1830void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys, acpi_size size) =
1831 x86_acpi_os_ioremap;
1832EXPORT_SYMBOL_GPL(acpi_os_ioremap);
1833#endif
1/*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26#include <linux/init.h>
27#include <linux/acpi.h>
28#include <linux/acpi_pmtmr.h>
29#include <linux/efi.h>
30#include <linux/cpumask.h>
31#include <linux/export.h>
32#include <linux/dmi.h>
33#include <linux/irq.h>
34#include <linux/slab.h>
35#include <linux/bootmem.h>
36#include <linux/ioport.h>
37#include <linux/pci.h>
38
39#include <asm/irqdomain.h>
40#include <asm/pci_x86.h>
41#include <asm/pgtable.h>
42#include <asm/io_apic.h>
43#include <asm/apic.h>
44#include <asm/io.h>
45#include <asm/mpspec.h>
46#include <asm/smp.h>
47#include <asm/i8259.h>
48
49#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50static int __initdata acpi_force = 0;
51int acpi_disabled;
52EXPORT_SYMBOL(acpi_disabled);
53
54#ifdef CONFIG_X86_64
55# include <asm/proto.h>
56#endif /* X86 */
57
58#define PREFIX "ACPI: "
59
60int acpi_noirq; /* skip ACPI IRQ initialization */
61int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
62EXPORT_SYMBOL(acpi_pci_disabled);
63
64int acpi_lapic;
65int acpi_ioapic;
66int acpi_strict;
67int acpi_disable_cmcff;
68
69u8 acpi_sci_flags __initdata;
70int acpi_sci_override_gsi __initdata;
71int acpi_skip_timer_override __initdata;
72int acpi_use_timer_override __initdata;
73int acpi_fix_pin2_polarity __initdata;
74
75#ifdef CONFIG_X86_LOCAL_APIC
76static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
77#endif
78
79#ifdef CONFIG_X86_IO_APIC
80/*
81 * Locks related to IOAPIC hotplug
82 * Hotplug side:
83 * ->device_hotplug_lock
84 * ->acpi_ioapic_lock
85 * ->ioapic_lock
86 * Interrupt mapping side:
87 * ->acpi_ioapic_lock
88 * ->ioapic_mutex
89 * ->ioapic_lock
90 */
91static DEFINE_MUTEX(acpi_ioapic_lock);
92#endif
93
94/* --------------------------------------------------------------------------
95 Boot-time Configuration
96 -------------------------------------------------------------------------- */
97
98/*
99 * The default interrupt routing model is PIC (8259). This gets
100 * overridden if IOAPICs are enumerated (below).
101 */
102enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
103
104
105/*
106 * ISA irqs by default are the first 16 gsis but can be
107 * any gsi as specified by an interrupt source override.
108 */
109static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
110 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
111};
112
113#define ACPI_INVALID_GSI INT_MIN
114
115/*
116 * This is just a simple wrapper around early_ioremap(),
117 * with sanity checks for phys == 0 and size == 0.
118 */
119char *__init __acpi_map_table(unsigned long phys, unsigned long size)
120{
121
122 if (!phys || !size)
123 return NULL;
124
125 return early_ioremap(phys, size);
126}
127
128void __init __acpi_unmap_table(char *map, unsigned long size)
129{
130 if (!map || !size)
131 return;
132
133 early_iounmap(map, size);
134}
135
136#ifdef CONFIG_X86_LOCAL_APIC
137static int __init acpi_parse_madt(struct acpi_table_header *table)
138{
139 struct acpi_table_madt *madt = NULL;
140
141 if (!boot_cpu_has(X86_FEATURE_APIC))
142 return -EINVAL;
143
144 madt = (struct acpi_table_madt *)table;
145 if (!madt) {
146 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
147 return -ENODEV;
148 }
149
150 if (madt->address) {
151 acpi_lapic_addr = (u64) madt->address;
152
153 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
154 madt->address);
155 }
156
157 default_acpi_madt_oem_check(madt->header.oem_id,
158 madt->header.oem_table_id);
159
160 return 0;
161}
162
163/**
164 * acpi_register_lapic - register a local apic and generates a logic cpu number
165 * @id: local apic id to register
166 * @acpiid: ACPI id to register
167 * @enabled: this cpu is enabled or not
168 *
169 * Returns the logic cpu number which maps to the local apic
170 */
171static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
172{
173 unsigned int ver = 0;
174 int cpu;
175
176 if (id >= MAX_LOCAL_APIC) {
177 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
178 return -EINVAL;
179 }
180
181 if (boot_cpu_physical_apicid != -1U)
182 ver = boot_cpu_apic_version;
183
184 cpu = __generic_processor_info(id, ver, enabled);
185 if (cpu >= 0)
186 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
187
188 return cpu;
189}
190
191static int __init
192acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
193{
194 struct acpi_madt_local_x2apic *processor = NULL;
195 int apic_id;
196 u8 enabled;
197
198 processor = (struct acpi_madt_local_x2apic *)header;
199
200 if (BAD_MADT_ENTRY(processor, end))
201 return -EINVAL;
202
203 acpi_table_print_madt_entry(header);
204
205 apic_id = processor->local_apic_id;
206 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
207#ifdef CONFIG_X86_X2APIC
208 /*
209 * We need to register disabled CPU as well to permit
210 * counting disabled CPUs. This allows us to size
211 * cpus_possible_map more accurately, to permit
212 * to not preallocating memory for all NR_CPUS
213 * when we use CPU hotplug.
214 */
215 if (!apic->apic_id_valid(apic_id) && enabled)
216 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
217 else
218 acpi_register_lapic(apic_id, processor->uid, enabled);
219#else
220 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
221#endif
222
223 return 0;
224}
225
226static int __init
227acpi_parse_lapic(struct acpi_subtable_header * 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);
237
238 /* Ignore invalid ID */
239 if (processor->id == 0xff)
240 return 0;
241
242 /*
243 * We need to register disabled CPU as well to permit
244 * counting disabled CPUs. This allows us to size
245 * cpus_possible_map more accurately, to permit
246 * to not preallocating memory for all NR_CPUS
247 * when we use CPU hotplug.
248 */
249 acpi_register_lapic(processor->id, /* APIC ID */
250 processor->processor_id, /* ACPI ID */
251 processor->lapic_flags & ACPI_MADT_ENABLED);
252
253 return 0;
254}
255
256static int __init
257acpi_parse_sapic(struct acpi_subtable_header *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);
267
268 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
269 processor->processor_id, /* ACPI ID */
270 processor->lapic_flags & ACPI_MADT_ENABLED);
271
272 return 0;
273}
274
275static int __init
276acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * 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);
287
288 acpi_lapic_addr = lapic_addr_ovr->address;
289
290 return 0;
291}
292
293static int __init
294acpi_parse_x2apic_nmi(struct acpi_subtable_header *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);
305
306 if (x2apic_nmi->lint != 1)
307 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
308
309 return 0;
310}
311
312static int __init
313acpi_parse_lapic_nmi(struct acpi_subtable_header * 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);
323
324 if (lapic_nmi->lint != 1)
325 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
326
327 return 0;
328}
329
330#endif /*CONFIG_X86_LOCAL_APIC */
331
332#ifdef CONFIG_X86_IO_APIC
333#define MP_ISA_BUS 0
334
335static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
336 u32 gsi)
337{
338 int ioapic;
339 int pin;
340 struct mpc_intsrc mp_irq;
341
342 /*
343 * Convert 'gsi' to 'ioapic.pin'.
344 */
345 ioapic = mp_find_ioapic(gsi);
346 if (ioapic < 0)
347 return;
348 pin = mp_find_ioapic_pin(ioapic, gsi);
349
350 /*
351 * TBD: This check is for faulty timer entries, where the override
352 * erroneously sets the trigger to level, resulting in a HUGE
353 * increase of timer interrupts!
354 */
355 if ((bus_irq == 0) && (trigger == 3))
356 trigger = 1;
357
358 mp_irq.type = MP_INTSRC;
359 mp_irq.irqtype = mp_INT;
360 mp_irq.irqflag = (trigger << 2) | polarity;
361 mp_irq.srcbus = MP_ISA_BUS;
362 mp_irq.srcbusirq = bus_irq; /* IRQ */
363 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
364 mp_irq.dstirq = pin; /* INTIN# */
365
366 mp_save_irq(&mp_irq);
367
368 /*
369 * Reset default identity mapping if gsi is also an legacy IRQ,
370 * otherwise there will be more than one entry with the same GSI
371 * and acpi_isa_irq_to_gsi() may give wrong result.
372 */
373 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
374 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
375 isa_irq_to_gsi[bus_irq] = gsi;
376}
377
378static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
379 int polarity)
380{
381#ifdef CONFIG_X86_MPPARSE
382 struct mpc_intsrc mp_irq;
383 struct pci_dev *pdev;
384 unsigned char number;
385 unsigned int devfn;
386 int ioapic;
387 u8 pin;
388
389 if (!acpi_ioapic)
390 return 0;
391 if (!dev || !dev_is_pci(dev))
392 return 0;
393
394 pdev = to_pci_dev(dev);
395 number = pdev->bus->number;
396 devfn = pdev->devfn;
397 pin = pdev->pin;
398 /* print the entry should happen on mptable identically */
399 mp_irq.type = MP_INTSRC;
400 mp_irq.irqtype = mp_INT;
401 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
402 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
403 mp_irq.srcbus = number;
404 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
405 ioapic = mp_find_ioapic(gsi);
406 mp_irq.dstapic = mpc_ioapic_id(ioapic);
407 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
408
409 mp_save_irq(&mp_irq);
410#endif
411 return 0;
412}
413
414static int __init
415acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
416{
417 struct acpi_madt_io_apic *ioapic = NULL;
418 struct ioapic_domain_cfg cfg = {
419 .type = IOAPIC_DOMAIN_DYNAMIC,
420 .ops = &mp_ioapic_irqdomain_ops,
421 };
422
423 ioapic = (struct acpi_madt_io_apic *)header;
424
425 if (BAD_MADT_ENTRY(ioapic, end))
426 return -EINVAL;
427
428 acpi_table_print_madt_entry(header);
429
430 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
431 if (ioapic->global_irq_base < nr_legacy_irqs())
432 cfg.type = IOAPIC_DOMAIN_LEGACY;
433
434 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
435 &cfg);
436
437 return 0;
438}
439
440/*
441 * Parse Interrupt Source Override for the ACPI SCI
442 */
443static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
444{
445 if (trigger == 0) /* compatible SCI trigger is level */
446 trigger = 3;
447
448 if (polarity == 0) /* compatible SCI polarity is low */
449 polarity = 3;
450
451 /* Command-line over-ride via acpi_sci= */
452 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
453 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
454
455 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
456 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
457
458 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
459 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
460
461 /*
462 * stash over-ride to indicate we've been here
463 * and for later update of acpi_gbl_FADT
464 */
465 acpi_sci_override_gsi = gsi;
466 return;
467}
468
469static int __init
470acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
471 const unsigned long end)
472{
473 struct acpi_madt_interrupt_override *intsrc = NULL;
474
475 intsrc = (struct acpi_madt_interrupt_override *)header;
476
477 if (BAD_MADT_ENTRY(intsrc, end))
478 return -EINVAL;
479
480 acpi_table_print_madt_entry(header);
481
482 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
483 acpi_sci_ioapic_setup(intsrc->source_irq,
484 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
485 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
486 intsrc->global_irq);
487 return 0;
488 }
489
490 if (intsrc->source_irq == 0) {
491 if (acpi_skip_timer_override) {
492 printk(PREFIX "BIOS IRQ0 override ignored.\n");
493 return 0;
494 }
495
496 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
497 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
498 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
499 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
500 }
501 }
502
503 mp_override_legacy_irq(intsrc->source_irq,
504 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
505 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
506 intsrc->global_irq);
507
508 return 0;
509}
510
511static int __init
512acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
513{
514 struct acpi_madt_nmi_source *nmi_src = NULL;
515
516 nmi_src = (struct acpi_madt_nmi_source *)header;
517
518 if (BAD_MADT_ENTRY(nmi_src, end))
519 return -EINVAL;
520
521 acpi_table_print_madt_entry(header);
522
523 /* TBD: Support nimsrc entries? */
524
525 return 0;
526}
527
528#endif /* CONFIG_X86_IO_APIC */
529
530/*
531 * acpi_pic_sci_set_trigger()
532 *
533 * use ELCR to set PIC-mode trigger type for SCI
534 *
535 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
536 * it may require Edge Trigger -- use "acpi_sci=edge"
537 *
538 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
539 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
540 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
541 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
542 */
543
544void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
545{
546 unsigned int mask = 1 << irq;
547 unsigned int old, new;
548
549 /* Real old ELCR mask */
550 old = inb(0x4d0) | (inb(0x4d1) << 8);
551
552 /*
553 * If we use ACPI to set PCI IRQs, then we should clear ELCR
554 * since we will set it correctly as we enable the PCI irq
555 * routing.
556 */
557 new = acpi_noirq ? old : 0;
558
559 /*
560 * Update SCI information in the ELCR, it isn't in the PCI
561 * routing tables..
562 */
563 switch (trigger) {
564 case 1: /* Edge - clear */
565 new &= ~mask;
566 break;
567 case 3: /* Level - set */
568 new |= mask;
569 break;
570 }
571
572 if (old == new)
573 return;
574
575 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
576 outb(new, 0x4d0);
577 outb(new >> 8, 0x4d1);
578}
579
580int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
581{
582 int rc, irq, trigger, polarity;
583
584 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
585 *irqp = gsi;
586 return 0;
587 }
588
589 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
590 if (rc == 0) {
591 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
592 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
593 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
594 if (irq >= 0) {
595 *irqp = irq;
596 return 0;
597 }
598 }
599
600 return -1;
601}
602EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
603
604int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
605{
606 if (isa_irq < nr_legacy_irqs() &&
607 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
608 *gsi = isa_irq_to_gsi[isa_irq];
609 return 0;
610 }
611
612 return -1;
613}
614
615static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
616 int trigger, int polarity)
617{
618#ifdef CONFIG_PCI
619 /*
620 * Make sure all (legacy) PCI IRQs are set as level-triggered.
621 */
622 if (trigger == ACPI_LEVEL_SENSITIVE)
623 elcr_set_level_irq(gsi);
624#endif
625
626 return gsi;
627}
628
629#ifdef CONFIG_X86_LOCAL_APIC
630static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
631 int trigger, int polarity)
632{
633 int irq = gsi;
634#ifdef CONFIG_X86_IO_APIC
635 int node;
636 struct irq_alloc_info info;
637
638 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
639 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
640 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
641 ioapic_set_alloc_attr(&info, node, trigger, polarity);
642
643 mutex_lock(&acpi_ioapic_lock);
644 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
645 /* Don't set up the ACPI SCI because it's already set up */
646 if (irq >= 0 && enable_update_mptable &&
647 acpi_gbl_FADT.sci_interrupt != gsi)
648 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
649 mutex_unlock(&acpi_ioapic_lock);
650#endif
651
652 return irq;
653}
654
655static void acpi_unregister_gsi_ioapic(u32 gsi)
656{
657#ifdef CONFIG_X86_IO_APIC
658 int irq;
659
660 mutex_lock(&acpi_ioapic_lock);
661 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
662 if (irq > 0)
663 mp_unmap_irq(irq);
664 mutex_unlock(&acpi_ioapic_lock);
665#endif
666}
667#endif
668
669int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
670 int trigger, int polarity) = acpi_register_gsi_pic;
671void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
672
673#ifdef CONFIG_ACPI_SLEEP
674int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
675#else
676int (*acpi_suspend_lowlevel)(void);
677#endif
678
679/*
680 * success: return IRQ number (>=0)
681 * failure: return < 0
682 */
683int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
684{
685 return __acpi_register_gsi(dev, gsi, trigger, polarity);
686}
687EXPORT_SYMBOL_GPL(acpi_register_gsi);
688
689void acpi_unregister_gsi(u32 gsi)
690{
691 if (__acpi_unregister_gsi)
692 __acpi_unregister_gsi(gsi);
693}
694EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
695
696#ifdef CONFIG_X86_LOCAL_APIC
697static void __init acpi_set_irq_model_ioapic(void)
698{
699 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
700 __acpi_register_gsi = acpi_register_gsi_ioapic;
701 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
702 acpi_ioapic = 1;
703}
704#endif
705
706/*
707 * ACPI based hotplug support for CPU
708 */
709#ifdef CONFIG_ACPI_HOTPLUG_CPU
710#include <acpi/processor.h>
711
712int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
713{
714#ifdef CONFIG_ACPI_NUMA
715 int nid;
716
717 nid = acpi_get_node(handle);
718 if (nid != NUMA_NO_NODE) {
719 set_apicid_to_node(physid, nid);
720 numa_set_node(cpu, nid);
721 }
722#endif
723 return 0;
724}
725
726int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
727{
728 int cpu;
729
730 cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
731 if (cpu < 0) {
732 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
733 return cpu;
734 }
735
736 acpi_processor_set_pdc(handle);
737 acpi_map_cpu2node(handle, cpu, physid);
738
739 *pcpu = cpu;
740 return 0;
741}
742EXPORT_SYMBOL(acpi_map_cpu);
743
744int acpi_unmap_cpu(int cpu)
745{
746#ifdef CONFIG_ACPI_NUMA
747 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
748#endif
749
750 per_cpu(x86_cpu_to_apicid, cpu) = -1;
751 set_cpu_present(cpu, false);
752 num_processors--;
753
754 return (0);
755}
756EXPORT_SYMBOL(acpi_unmap_cpu);
757#endif /* CONFIG_ACPI_HOTPLUG_CPU */
758
759int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
760{
761 int ret = -ENOSYS;
762#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
763 int ioapic_id;
764 u64 addr;
765 struct ioapic_domain_cfg cfg = {
766 .type = IOAPIC_DOMAIN_DYNAMIC,
767 .ops = &mp_ioapic_irqdomain_ops,
768 };
769
770 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
771 if (ioapic_id < 0) {
772 unsigned long long uid;
773 acpi_status status;
774
775 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
776 NULL, &uid);
777 if (ACPI_FAILURE(status)) {
778 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
779 return -EINVAL;
780 }
781 ioapic_id = (int)uid;
782 }
783
784 mutex_lock(&acpi_ioapic_lock);
785 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
786 mutex_unlock(&acpi_ioapic_lock);
787#endif
788
789 return ret;
790}
791EXPORT_SYMBOL(acpi_register_ioapic);
792
793int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
794{
795 int ret = -ENOSYS;
796
797#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
798 mutex_lock(&acpi_ioapic_lock);
799 ret = mp_unregister_ioapic(gsi_base);
800 mutex_unlock(&acpi_ioapic_lock);
801#endif
802
803 return ret;
804}
805EXPORT_SYMBOL(acpi_unregister_ioapic);
806
807/**
808 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
809 * has been registered
810 * @handle: ACPI handle of the IOAPIC deivce
811 * @gsi_base: GSI base associated with the IOAPIC
812 *
813 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
814 * with acpi_register_ioapic()/acpi_unregister_ioapic().
815 */
816int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
817{
818 int ret = 0;
819
820#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
821 mutex_lock(&acpi_ioapic_lock);
822 ret = mp_ioapic_registered(gsi_base);
823 mutex_unlock(&acpi_ioapic_lock);
824#endif
825
826 return ret;
827}
828
829static int __init acpi_parse_sbf(struct acpi_table_header *table)
830{
831 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
832
833 sbf_port = sb->cmos_index; /* Save CMOS port */
834
835 return 0;
836}
837
838#ifdef CONFIG_HPET_TIMER
839#include <asm/hpet.h>
840
841static struct resource *hpet_res __initdata;
842
843static int __init acpi_parse_hpet(struct acpi_table_header *table)
844{
845 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
846
847 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
848 printk(KERN_WARNING PREFIX "HPET timers must be located in "
849 "memory.\n");
850 return -1;
851 }
852
853 hpet_address = hpet_tbl->address.address;
854 hpet_blockid = hpet_tbl->sequence;
855
856 /*
857 * Some broken BIOSes advertise HPET at 0x0. We really do not
858 * want to allocate a resource there.
859 */
860 if (!hpet_address) {
861 printk(KERN_WARNING PREFIX
862 "HPET id: %#x base: %#lx is invalid\n",
863 hpet_tbl->id, hpet_address);
864 return 0;
865 }
866#ifdef CONFIG_X86_64
867 /*
868 * Some even more broken BIOSes advertise HPET at
869 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
870 * some noise:
871 */
872 if (hpet_address == 0xfed0000000000000UL) {
873 if (!hpet_force_user) {
874 printk(KERN_WARNING PREFIX "HPET id: %#x "
875 "base: 0xfed0000000000000 is bogus\n "
876 "try hpet=force on the kernel command line to "
877 "fix it up to 0xfed00000.\n", hpet_tbl->id);
878 hpet_address = 0;
879 return 0;
880 }
881 printk(KERN_WARNING PREFIX
882 "HPET id: %#x base: 0xfed0000000000000 fixed up "
883 "to 0xfed00000.\n", hpet_tbl->id);
884 hpet_address >>= 32;
885 }
886#endif
887 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
888 hpet_tbl->id, hpet_address);
889
890 /*
891 * Allocate and initialize the HPET firmware resource for adding into
892 * the resource tree during the lateinit timeframe.
893 */
894#define HPET_RESOURCE_NAME_SIZE 9
895 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
896
897 hpet_res->name = (void *)&hpet_res[1];
898 hpet_res->flags = IORESOURCE_MEM;
899 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
900 hpet_tbl->sequence);
901
902 hpet_res->start = hpet_address;
903 hpet_res->end = hpet_address + (1 * 1024) - 1;
904
905 return 0;
906}
907
908/*
909 * hpet_insert_resource inserts the HPET resources used into the resource
910 * tree.
911 */
912static __init int hpet_insert_resource(void)
913{
914 if (!hpet_res)
915 return 1;
916
917 return insert_resource(&iomem_resource, hpet_res);
918}
919
920late_initcall(hpet_insert_resource);
921
922#else
923#define acpi_parse_hpet NULL
924#endif
925
926static int __init acpi_parse_fadt(struct acpi_table_header *table)
927{
928 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
929 pr_debug("ACPI: no legacy devices present\n");
930 x86_platform.legacy.devices.pnpbios = 0;
931 }
932
933 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
934 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
935 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
936 pr_debug("ACPI: i8042 controller is absent\n");
937 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
938 }
939
940 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
941 pr_debug("ACPI: not registering RTC platform device\n");
942 x86_platform.legacy.rtc = 0;
943 }
944
945#ifdef CONFIG_X86_PM_TIMER
946 /* detect the location of the ACPI PM Timer */
947 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
948 /* FADT rev. 2 */
949 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
950 ACPI_ADR_SPACE_SYSTEM_IO)
951 return 0;
952
953 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
954 /*
955 * "X" fields are optional extensions to the original V1.0
956 * fields, so we must selectively expand V1.0 fields if the
957 * corresponding X field is zero.
958 */
959 if (!pmtmr_ioport)
960 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
961 } else {
962 /* FADT rev. 1 */
963 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
964 }
965 if (pmtmr_ioport)
966 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
967 pmtmr_ioport);
968#endif
969 return 0;
970}
971
972#ifdef CONFIG_X86_LOCAL_APIC
973/*
974 * Parse LAPIC entries in MADT
975 * returns 0 on success, < 0 on error
976 */
977
978static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
979{
980 int count;
981
982 if (!boot_cpu_has(X86_FEATURE_APIC))
983 return -ENODEV;
984
985 /*
986 * Note that the LAPIC address is obtained from the MADT (32-bit value)
987 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
988 */
989
990 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
991 acpi_parse_lapic_addr_ovr, 0);
992 if (count < 0) {
993 printk(KERN_ERR PREFIX
994 "Error parsing LAPIC address override entry\n");
995 return count;
996 }
997
998 register_lapic_address(acpi_lapic_addr);
999
1000 return count;
1001}
1002
1003static int __init acpi_parse_madt_lapic_entries(void)
1004{
1005 int count;
1006 int x2count = 0;
1007 int ret;
1008 struct acpi_subtable_proc madt_proc[2];
1009
1010 if (!boot_cpu_has(X86_FEATURE_APIC))
1011 return -ENODEV;
1012
1013 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1014 acpi_parse_sapic, MAX_LOCAL_APIC);
1015
1016 if (!count) {
1017 memset(madt_proc, 0, sizeof(madt_proc));
1018 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1019 madt_proc[0].handler = acpi_parse_lapic;
1020 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1021 madt_proc[1].handler = acpi_parse_x2apic;
1022 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1023 sizeof(struct acpi_table_madt),
1024 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1025 if (ret < 0) {
1026 printk(KERN_ERR PREFIX
1027 "Error parsing LAPIC/X2APIC entries\n");
1028 return ret;
1029 }
1030
1031 count = madt_proc[0].count;
1032 x2count = madt_proc[1].count;
1033 }
1034 if (!count && !x2count) {
1035 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1036 /* TBD: Cleanup to allow fallback to MPS */
1037 return -ENODEV;
1038 } else if (count < 0 || x2count < 0) {
1039 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1040 /* TBD: Cleanup to allow fallback to MPS */
1041 return count;
1042 }
1043
1044 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1045 acpi_parse_x2apic_nmi, 0);
1046 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1047 acpi_parse_lapic_nmi, 0);
1048 if (count < 0 || x2count < 0) {
1049 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1050 /* TBD: Cleanup to allow fallback to MPS */
1051 return count;
1052 }
1053 return 0;
1054}
1055#endif /* CONFIG_X86_LOCAL_APIC */
1056
1057#ifdef CONFIG_X86_IO_APIC
1058static void __init mp_config_acpi_legacy_irqs(void)
1059{
1060 int i;
1061 struct mpc_intsrc mp_irq;
1062
1063#ifdef CONFIG_EISA
1064 /*
1065 * Fabricate the legacy ISA bus (bus #31).
1066 */
1067 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1068#endif
1069 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1070 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1071
1072 /*
1073 * Use the default configuration for the IRQs 0-15. Unless
1074 * overridden by (MADT) interrupt source override entries.
1075 */
1076 for (i = 0; i < nr_legacy_irqs(); i++) {
1077 int ioapic, pin;
1078 unsigned int dstapic;
1079 int idx;
1080 u32 gsi;
1081
1082 /* Locate the gsi that irq i maps to. */
1083 if (acpi_isa_irq_to_gsi(i, &gsi))
1084 continue;
1085
1086 /*
1087 * Locate the IOAPIC that manages the ISA IRQ.
1088 */
1089 ioapic = mp_find_ioapic(gsi);
1090 if (ioapic < 0)
1091 continue;
1092 pin = mp_find_ioapic_pin(ioapic, gsi);
1093 dstapic = mpc_ioapic_id(ioapic);
1094
1095 for (idx = 0; idx < mp_irq_entries; idx++) {
1096 struct mpc_intsrc *irq = mp_irqs + idx;
1097
1098 /* Do we already have a mapping for this ISA IRQ? */
1099 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1100 break;
1101
1102 /* Do we already have a mapping for this IOAPIC pin */
1103 if (irq->dstapic == dstapic && irq->dstirq == pin)
1104 break;
1105 }
1106
1107 if (idx != mp_irq_entries) {
1108 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1109 continue; /* IRQ already used */
1110 }
1111
1112 mp_irq.type = MP_INTSRC;
1113 mp_irq.irqflag = 0; /* Conforming */
1114 mp_irq.srcbus = MP_ISA_BUS;
1115 mp_irq.dstapic = dstapic;
1116 mp_irq.irqtype = mp_INT;
1117 mp_irq.srcbusirq = i; /* Identity mapped */
1118 mp_irq.dstirq = pin;
1119
1120 mp_save_irq(&mp_irq);
1121 }
1122}
1123
1124/*
1125 * Parse IOAPIC related entries in MADT
1126 * returns 0 on success, < 0 on error
1127 */
1128static int __init acpi_parse_madt_ioapic_entries(void)
1129{
1130 int count;
1131
1132 /*
1133 * ACPI interpreter is required to complete interrupt setup,
1134 * so if it is off, don't enumerate the io-apics with ACPI.
1135 * If MPS is present, it will handle them,
1136 * otherwise the system will stay in PIC mode
1137 */
1138 if (acpi_disabled || acpi_noirq)
1139 return -ENODEV;
1140
1141 if (!boot_cpu_has(X86_FEATURE_APIC))
1142 return -ENODEV;
1143
1144 /*
1145 * if "noapic" boot option, don't look for IO-APICs
1146 */
1147 if (skip_ioapic_setup) {
1148 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1149 "due to 'noapic' option.\n");
1150 return -ENODEV;
1151 }
1152
1153 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1154 MAX_IO_APICS);
1155 if (!count) {
1156 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1157 return -ENODEV;
1158 } else if (count < 0) {
1159 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1160 return count;
1161 }
1162
1163 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1164 acpi_parse_int_src_ovr, nr_irqs);
1165 if (count < 0) {
1166 printk(KERN_ERR PREFIX
1167 "Error parsing interrupt source overrides entry\n");
1168 /* TBD: Cleanup to allow fallback to MPS */
1169 return count;
1170 }
1171
1172 /*
1173 * If BIOS did not supply an INT_SRC_OVR for the SCI
1174 * pretend we got one so we can set the SCI flags.
1175 */
1176 if (!acpi_sci_override_gsi)
1177 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1178 acpi_gbl_FADT.sci_interrupt);
1179
1180 /* Fill in identity legacy mappings where no override */
1181 mp_config_acpi_legacy_irqs();
1182
1183 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1184 acpi_parse_nmi_src, nr_irqs);
1185 if (count < 0) {
1186 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1187 /* TBD: Cleanup to allow fallback to MPS */
1188 return count;
1189 }
1190
1191 return 0;
1192}
1193#else
1194static inline int acpi_parse_madt_ioapic_entries(void)
1195{
1196 return -1;
1197}
1198#endif /* !CONFIG_X86_IO_APIC */
1199
1200static void __init early_acpi_process_madt(void)
1201{
1202#ifdef CONFIG_X86_LOCAL_APIC
1203 int error;
1204
1205 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1206
1207 /*
1208 * Parse MADT LAPIC entries
1209 */
1210 error = early_acpi_parse_madt_lapic_addr_ovr();
1211 if (!error) {
1212 acpi_lapic = 1;
1213 smp_found_config = 1;
1214 }
1215 if (error == -EINVAL) {
1216 /*
1217 * Dell Precision Workstation 410, 610 come here.
1218 */
1219 printk(KERN_ERR PREFIX
1220 "Invalid BIOS MADT, disabling ACPI\n");
1221 disable_acpi();
1222 }
1223 }
1224#endif
1225}
1226
1227static void __init acpi_process_madt(void)
1228{
1229#ifdef CONFIG_X86_LOCAL_APIC
1230 int error;
1231
1232 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1233
1234 /*
1235 * Parse MADT LAPIC entries
1236 */
1237 error = acpi_parse_madt_lapic_entries();
1238 if (!error) {
1239 acpi_lapic = 1;
1240
1241 /*
1242 * Parse MADT IO-APIC entries
1243 */
1244 mutex_lock(&acpi_ioapic_lock);
1245 error = acpi_parse_madt_ioapic_entries();
1246 mutex_unlock(&acpi_ioapic_lock);
1247 if (!error) {
1248 acpi_set_irq_model_ioapic();
1249
1250 smp_found_config = 1;
1251 }
1252 }
1253 if (error == -EINVAL) {
1254 /*
1255 * Dell Precision Workstation 410, 610 come here.
1256 */
1257 printk(KERN_ERR PREFIX
1258 "Invalid BIOS MADT, disabling ACPI\n");
1259 disable_acpi();
1260 }
1261 } else {
1262 /*
1263 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1264 * In the event an MPS table was found, forget it.
1265 * Boot with "acpi=off" to use MPS on such a system.
1266 */
1267 if (smp_found_config) {
1268 printk(KERN_WARNING PREFIX
1269 "No APIC-table, disabling MPS\n");
1270 smp_found_config = 0;
1271 }
1272 }
1273
1274 /*
1275 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1276 * processors, where MPS only supports physical.
1277 */
1278 if (acpi_lapic && acpi_ioapic)
1279 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1280 "information\n");
1281 else if (acpi_lapic)
1282 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1283 "configuration information\n");
1284#endif
1285 return;
1286}
1287
1288static int __init disable_acpi_irq(const struct dmi_system_id *d)
1289{
1290 if (!acpi_force) {
1291 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1292 d->ident);
1293 acpi_noirq_set();
1294 }
1295 return 0;
1296}
1297
1298static int __init disable_acpi_pci(const struct dmi_system_id *d)
1299{
1300 if (!acpi_force) {
1301 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1302 d->ident);
1303 acpi_disable_pci();
1304 }
1305 return 0;
1306}
1307
1308static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1309{
1310 if (!acpi_force) {
1311 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1312 disable_acpi();
1313 } else {
1314 printk(KERN_NOTICE
1315 "Warning: DMI blacklist says broken, but acpi forced\n");
1316 }
1317 return 0;
1318}
1319
1320/*
1321 * Force ignoring BIOS IRQ0 override
1322 */
1323static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1324{
1325 if (!acpi_skip_timer_override) {
1326 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1327 d->ident);
1328 acpi_skip_timer_override = 1;
1329 }
1330 return 0;
1331}
1332
1333/*
1334 * ACPI offers an alternative platform interface model that removes
1335 * ACPI hardware requirements for platforms that do not implement
1336 * the PC Architecture.
1337 *
1338 * We initialize the Hardware-reduced ACPI model here:
1339 */
1340static void __init acpi_reduced_hw_init(void)
1341{
1342 if (acpi_gbl_reduced_hardware) {
1343 /*
1344 * Override x86_init functions and bypass legacy pic
1345 * in Hardware-reduced ACPI mode
1346 */
1347 x86_init.timers.timer_init = x86_init_noop;
1348 x86_init.irqs.pre_vector_init = x86_init_noop;
1349 legacy_pic = &null_legacy_pic;
1350 }
1351}
1352
1353/*
1354 * If your system is blacklisted here, but you find that acpi=force
1355 * works for you, please contact linux-acpi@vger.kernel.org
1356 */
1357static struct dmi_system_id __initdata acpi_dmi_table[] = {
1358 /*
1359 * Boxes that need ACPI disabled
1360 */
1361 {
1362 .callback = dmi_disable_acpi,
1363 .ident = "IBM Thinkpad",
1364 .matches = {
1365 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1366 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1367 },
1368 },
1369
1370 /*
1371 * Boxes that need ACPI PCI IRQ routing disabled
1372 */
1373 {
1374 .callback = disable_acpi_irq,
1375 .ident = "ASUS A7V",
1376 .matches = {
1377 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1378 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1379 /* newer BIOS, Revision 1011, does work */
1380 DMI_MATCH(DMI_BIOS_VERSION,
1381 "ASUS A7V ACPI BIOS Revision 1007"),
1382 },
1383 },
1384 {
1385 /*
1386 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1387 * for LPC bridge, which is needed for the PCI
1388 * interrupt links to work. DSDT fix is in bug 5966.
1389 * 2645, 2646 model numbers are shared with 600/600E/600X
1390 */
1391 .callback = disable_acpi_irq,
1392 .ident = "IBM Thinkpad 600 Series 2645",
1393 .matches = {
1394 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1395 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1396 },
1397 },
1398 {
1399 .callback = disable_acpi_irq,
1400 .ident = "IBM Thinkpad 600 Series 2646",
1401 .matches = {
1402 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1403 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1404 },
1405 },
1406 /*
1407 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1408 */
1409 { /* _BBN 0 bug */
1410 .callback = disable_acpi_pci,
1411 .ident = "ASUS PR-DLS",
1412 .matches = {
1413 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1414 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1415 DMI_MATCH(DMI_BIOS_VERSION,
1416 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1417 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1418 },
1419 },
1420 {
1421 .callback = disable_acpi_pci,
1422 .ident = "Acer TravelMate 36x Laptop",
1423 .matches = {
1424 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1425 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1426 },
1427 },
1428 {}
1429};
1430
1431/* second table for DMI checks that should run after early-quirks */
1432static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1433 /*
1434 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1435 * which includes some code which overrides all temperature
1436 * trip points to 16C if the INTIN2 input of the I/O APIC
1437 * is enabled. This input is incorrectly designated the
1438 * ISA IRQ 0 via an interrupt source override even though
1439 * it is wired to the output of the master 8259A and INTIN0
1440 * is not connected at all. Force ignoring BIOS IRQ0
1441 * override in that cases.
1442 */
1443 {
1444 .callback = dmi_ignore_irq0_timer_override,
1445 .ident = "HP nx6115 laptop",
1446 .matches = {
1447 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1448 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1449 },
1450 },
1451 {
1452 .callback = dmi_ignore_irq0_timer_override,
1453 .ident = "HP NX6125 laptop",
1454 .matches = {
1455 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1456 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1457 },
1458 },
1459 {
1460 .callback = dmi_ignore_irq0_timer_override,
1461 .ident = "HP NX6325 laptop",
1462 .matches = {
1463 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1465 },
1466 },
1467 {
1468 .callback = dmi_ignore_irq0_timer_override,
1469 .ident = "HP 6715b laptop",
1470 .matches = {
1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1473 },
1474 },
1475 {
1476 .callback = dmi_ignore_irq0_timer_override,
1477 .ident = "FUJITSU SIEMENS",
1478 .matches = {
1479 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1480 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1481 },
1482 },
1483 {}
1484};
1485
1486/*
1487 * acpi_boot_table_init() and acpi_boot_init()
1488 * called from setup_arch(), always.
1489 * 1. checksums all tables
1490 * 2. enumerates lapics
1491 * 3. enumerates io-apics
1492 *
1493 * acpi_table_init() is separate to allow reading SRAT without
1494 * other side effects.
1495 *
1496 * side effects of acpi_boot_init:
1497 * acpi_lapic = 1 if LAPIC found
1498 * acpi_ioapic = 1 if IOAPIC found
1499 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1500 * if acpi_blacklisted() acpi_disabled = 1;
1501 * acpi_irq_model=...
1502 * ...
1503 */
1504
1505void __init acpi_boot_table_init(void)
1506{
1507 dmi_check_system(acpi_dmi_table);
1508
1509 /*
1510 * If acpi_disabled, bail out
1511 */
1512 if (acpi_disabled)
1513 return;
1514
1515 /*
1516 * Initialize the ACPI boot-time table parser.
1517 */
1518 if (acpi_table_init()) {
1519 disable_acpi();
1520 return;
1521 }
1522
1523 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1524
1525 /*
1526 * blacklist may disable ACPI entirely
1527 */
1528 if (acpi_blacklisted()) {
1529 if (acpi_force) {
1530 printk(KERN_WARNING PREFIX "acpi=force override\n");
1531 } else {
1532 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1533 disable_acpi();
1534 return;
1535 }
1536 }
1537}
1538
1539int __init early_acpi_boot_init(void)
1540{
1541 /*
1542 * If acpi_disabled, bail out
1543 */
1544 if (acpi_disabled)
1545 return 1;
1546
1547 /*
1548 * Process the Multiple APIC Description Table (MADT), if present
1549 */
1550 early_acpi_process_madt();
1551
1552 /*
1553 * Hardware-reduced ACPI mode initialization:
1554 */
1555 acpi_reduced_hw_init();
1556
1557 return 0;
1558}
1559
1560int __init acpi_boot_init(void)
1561{
1562 /* those are executed after early-quirks are executed */
1563 dmi_check_system(acpi_dmi_table_late);
1564
1565 /*
1566 * If acpi_disabled, bail out
1567 */
1568 if (acpi_disabled)
1569 return 1;
1570
1571 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1572
1573 /*
1574 * set sci_int and PM timer address
1575 */
1576 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1577
1578 /*
1579 * Process the Multiple APIC Description Table (MADT), if present
1580 */
1581 acpi_process_madt();
1582
1583 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1584
1585 if (!acpi_noirq)
1586 x86_init.pci.init = pci_acpi_init;
1587
1588 return 0;
1589}
1590
1591static int __init parse_acpi(char *arg)
1592{
1593 if (!arg)
1594 return -EINVAL;
1595
1596 /* "acpi=off" disables both ACPI table parsing and interpreter */
1597 if (strcmp(arg, "off") == 0) {
1598 disable_acpi();
1599 }
1600 /* acpi=force to over-ride black-list */
1601 else if (strcmp(arg, "force") == 0) {
1602 acpi_force = 1;
1603 acpi_disabled = 0;
1604 }
1605 /* acpi=strict disables out-of-spec workarounds */
1606 else if (strcmp(arg, "strict") == 0) {
1607 acpi_strict = 1;
1608 }
1609 /* acpi=rsdt use RSDT instead of XSDT */
1610 else if (strcmp(arg, "rsdt") == 0) {
1611 acpi_gbl_do_not_use_xsdt = TRUE;
1612 }
1613 /* "acpi=noirq" disables ACPI interrupt routing */
1614 else if (strcmp(arg, "noirq") == 0) {
1615 acpi_noirq_set();
1616 }
1617 /* "acpi=copy_dsdt" copys DSDT */
1618 else if (strcmp(arg, "copy_dsdt") == 0) {
1619 acpi_gbl_copy_dsdt_locally = 1;
1620 }
1621 /* "acpi=nocmcff" disables FF mode for corrected errors */
1622 else if (strcmp(arg, "nocmcff") == 0) {
1623 acpi_disable_cmcff = 1;
1624 } else {
1625 /* Core will printk when we return error. */
1626 return -EINVAL;
1627 }
1628 return 0;
1629}
1630early_param("acpi", parse_acpi);
1631
1632/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1633static int __init parse_pci(char *arg)
1634{
1635 if (arg && strcmp(arg, "noacpi") == 0)
1636 acpi_disable_pci();
1637 return 0;
1638}
1639early_param("pci", parse_pci);
1640
1641int __init acpi_mps_check(void)
1642{
1643#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1644/* mptable code is not built-in*/
1645 if (acpi_disabled || acpi_noirq) {
1646 printk(KERN_WARNING "MPS support code is not built-in.\n"
1647 "Using acpi=off or acpi=noirq or pci=noacpi "
1648 "may have problem\n");
1649 return 1;
1650 }
1651#endif
1652 return 0;
1653}
1654
1655#ifdef CONFIG_X86_IO_APIC
1656static int __init parse_acpi_skip_timer_override(char *arg)
1657{
1658 acpi_skip_timer_override = 1;
1659 return 0;
1660}
1661early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1662
1663static int __init parse_acpi_use_timer_override(char *arg)
1664{
1665 acpi_use_timer_override = 1;
1666 return 0;
1667}
1668early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1669#endif /* CONFIG_X86_IO_APIC */
1670
1671static int __init setup_acpi_sci(char *s)
1672{
1673 if (!s)
1674 return -EINVAL;
1675 if (!strcmp(s, "edge"))
1676 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1677 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1678 else if (!strcmp(s, "level"))
1679 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1680 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1681 else if (!strcmp(s, "high"))
1682 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1683 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1684 else if (!strcmp(s, "low"))
1685 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1686 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1687 else
1688 return -EINVAL;
1689 return 0;
1690}
1691early_param("acpi_sci", setup_acpi_sci);
1692
1693int __acpi_acquire_global_lock(unsigned int *lock)
1694{
1695 unsigned int old, new, val;
1696 do {
1697 old = *lock;
1698 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1699 val = cmpxchg(lock, old, new);
1700 } while (unlikely (val != old));
1701 return (new < 3) ? -1 : 0;
1702}
1703
1704int __acpi_release_global_lock(unsigned int *lock)
1705{
1706 unsigned int old, new, val;
1707 do {
1708 old = *lock;
1709 new = old & ~0x3;
1710 val = cmpxchg(lock, old, new);
1711 } while (unlikely (val != old));
1712 return old & 0x1;
1713}
1714
1715void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1716{
1717 e820_add_region(addr, size, E820_ACPI);
1718 update_e820();
1719}