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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_64
71/* Physical address of the Multiprocessor Wakeup Structure mailbox */
72static u64 acpi_mp_wake_mailbox_paddr;
73/* Virtual address of the Multiprocessor Wakeup Structure mailbox */
74static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox;
75#endif
76
77#ifdef CONFIG_X86_IO_APIC
78/*
79 * Locks related to IOAPIC hotplug
80 * Hotplug side:
81 * ->device_hotplug_lock
82 * ->acpi_ioapic_lock
83 * ->ioapic_lock
84 * Interrupt mapping side:
85 * ->acpi_ioapic_lock
86 * ->ioapic_mutex
87 * ->ioapic_lock
88 */
89static DEFINE_MUTEX(acpi_ioapic_lock);
90#endif
91
92/* --------------------------------------------------------------------------
93 Boot-time Configuration
94 -------------------------------------------------------------------------- */
95
96/*
97 * The default interrupt routing model is PIC (8259). This gets
98 * overridden if IOAPICs are enumerated (below).
99 */
100enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
101
102
103/*
104 * ISA irqs by default are the first 16 gsis but can be
105 * any gsi as specified by an interrupt source override.
106 */
107static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
109};
110
111/*
112 * This is just a simple wrapper around early_memremap(),
113 * with sanity checks for phys == 0 and size == 0.
114 */
115void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
116{
117
118 if (!phys || !size)
119 return NULL;
120
121 return early_memremap(phys, size);
122}
123
124void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
125{
126 if (!map || !size)
127 return;
128
129 early_memunmap(map, size);
130}
131
132#ifdef CONFIG_X86_LOCAL_APIC
133static int __init acpi_parse_madt(struct acpi_table_header *table)
134{
135 struct acpi_table_madt *madt = NULL;
136
137 if (!boot_cpu_has(X86_FEATURE_APIC))
138 return -EINVAL;
139
140 madt = (struct acpi_table_madt *)table;
141 if (!madt) {
142 pr_warn("Unable to map MADT\n");
143 return -ENODEV;
144 }
145
146 if (madt->address) {
147 acpi_lapic_addr = (u64) madt->address;
148
149 pr_debug("Local APIC address 0x%08x\n", madt->address);
150 }
151
152 if (madt->flags & ACPI_MADT_PCAT_COMPAT)
153 legacy_pic_pcat_compat();
154
155 /* ACPI 6.3 and newer support the online capable bit. */
156 if (acpi_gbl_FADT.header.revision > 6 ||
157 (acpi_gbl_FADT.header.revision == 6 &&
158 acpi_gbl_FADT.minor_revision >= 3))
159 acpi_support_online_capable = true;
160
161 default_acpi_madt_oem_check(madt->header.oem_id,
162 madt->header.oem_table_id);
163
164 return 0;
165}
166
167/**
168 * acpi_register_lapic - register a local apic and generates a logic cpu number
169 * @id: local apic id to register
170 * @acpiid: ACPI id to register
171 * @enabled: this cpu is enabled or not
172 *
173 * Returns the logic cpu number which maps to the local apic
174 */
175static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
176{
177 int cpu;
178
179 if (id >= MAX_LOCAL_APIC) {
180 pr_info("skipped apicid that is too big\n");
181 return -EINVAL;
182 }
183
184 if (!enabled) {
185 ++disabled_cpus;
186 return -EINVAL;
187 }
188
189 cpu = generic_processor_info(id);
190 if (cpu >= 0)
191 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
192
193 return cpu;
194}
195
196static bool __init acpi_is_processor_usable(u32 lapic_flags)
197{
198 if (lapic_flags & ACPI_MADT_ENABLED)
199 return true;
200
201 if (!acpi_support_online_capable ||
202 (lapic_flags & ACPI_MADT_ONLINE_CAPABLE))
203 return true;
204
205 return false;
206}
207
208static int __init
209acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
210{
211 struct acpi_madt_local_x2apic *processor = NULL;
212#ifdef CONFIG_X86_X2APIC
213 u32 apic_id;
214 u8 enabled;
215#endif
216
217 processor = (struct acpi_madt_local_x2apic *)header;
218
219 if (BAD_MADT_ENTRY(processor, end))
220 return -EINVAL;
221
222 acpi_table_print_madt_entry(&header->common);
223
224#ifdef CONFIG_X86_X2APIC
225 apic_id = processor->local_apic_id;
226 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
227
228 /* Ignore invalid ID */
229 if (apic_id == 0xffffffff)
230 return 0;
231
232 /* don't register processors that cannot be onlined */
233 if (!acpi_is_processor_usable(processor->lapic_flags))
234 return 0;
235
236 /*
237 * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure
238 * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID
239 * in x2APIC must be equal or greater than 0xff.
240 */
241 if (has_lapic_cpus && apic_id < 0xff)
242 return 0;
243
244 /*
245 * We need to register disabled CPU as well to permit
246 * counting disabled CPUs. This allows us to size
247 * cpus_possible_map more accurately, to permit
248 * to not preallocating memory for all NR_CPUS
249 * when we use CPU hotplug.
250 */
251 if (!apic_id_valid(apic_id)) {
252 if (enabled)
253 pr_warn("x2apic entry ignored\n");
254 return 0;
255 }
256
257 acpi_register_lapic(apic_id, processor->uid, enabled);
258#else
259 pr_warn("x2apic entry ignored\n");
260#endif
261
262 return 0;
263}
264
265static int __init
266acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
267{
268 struct acpi_madt_local_apic *processor = NULL;
269
270 processor = (struct acpi_madt_local_apic *)header;
271
272 if (BAD_MADT_ENTRY(processor, end))
273 return -EINVAL;
274
275 acpi_table_print_madt_entry(&header->common);
276
277 /* Ignore invalid ID */
278 if (processor->id == 0xff)
279 return 0;
280
281 /* don't register processors that can not be onlined */
282 if (!acpi_is_processor_usable(processor->lapic_flags))
283 return 0;
284
285 /*
286 * We need to register disabled CPU as well to permit
287 * counting disabled CPUs. This allows us to size
288 * cpus_possible_map more accurately, to permit
289 * to not preallocating memory for all NR_CPUS
290 * when we use CPU hotplug.
291 */
292 acpi_register_lapic(processor->id, /* APIC ID */
293 processor->processor_id, /* ACPI ID */
294 processor->lapic_flags & ACPI_MADT_ENABLED);
295
296 has_lapic_cpus = true;
297 return 0;
298}
299
300static int __init
301acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
302{
303 struct acpi_madt_local_sapic *processor = NULL;
304
305 processor = (struct acpi_madt_local_sapic *)header;
306
307 if (BAD_MADT_ENTRY(processor, end))
308 return -EINVAL;
309
310 acpi_table_print_madt_entry(&header->common);
311
312 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
313 processor->processor_id, /* ACPI ID */
314 processor->lapic_flags & ACPI_MADT_ENABLED);
315
316 return 0;
317}
318
319static int __init
320acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
321 const unsigned long end)
322{
323 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
324
325 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
326
327 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
328 return -EINVAL;
329
330 acpi_table_print_madt_entry(&header->common);
331
332 acpi_lapic_addr = lapic_addr_ovr->address;
333
334 return 0;
335}
336
337static int __init
338acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
339 const unsigned long end)
340{
341 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
342
343 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
344
345 if (BAD_MADT_ENTRY(x2apic_nmi, end))
346 return -EINVAL;
347
348 acpi_table_print_madt_entry(&header->common);
349
350 if (x2apic_nmi->lint != 1)
351 pr_warn("NMI not connected to LINT 1!\n");
352
353 return 0;
354}
355
356static int __init
357acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
358{
359 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
360
361 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
362
363 if (BAD_MADT_ENTRY(lapic_nmi, end))
364 return -EINVAL;
365
366 acpi_table_print_madt_entry(&header->common);
367
368 if (lapic_nmi->lint != 1)
369 pr_warn("NMI not connected to LINT 1!\n");
370
371 return 0;
372}
373
374#ifdef CONFIG_X86_64
375static int acpi_wakeup_cpu(u32 apicid, unsigned long start_ip)
376{
377 /*
378 * Remap mailbox memory only for the first call to acpi_wakeup_cpu().
379 *
380 * Wakeup of secondary CPUs is fully serialized in the core code.
381 * No need to protect acpi_mp_wake_mailbox from concurrent accesses.
382 */
383 if (!acpi_mp_wake_mailbox) {
384 acpi_mp_wake_mailbox = memremap(acpi_mp_wake_mailbox_paddr,
385 sizeof(*acpi_mp_wake_mailbox),
386 MEMREMAP_WB);
387 }
388
389 /*
390 * Mailbox memory is shared between the firmware and OS. Firmware will
391 * listen on mailbox command address, and once it receives the wakeup
392 * command, the CPU associated with the given apicid will be booted.
393 *
394 * The value of 'apic_id' and 'wakeup_vector' must be visible to the
395 * firmware before the wakeup command is visible. smp_store_release()
396 * ensures ordering and visibility.
397 */
398 acpi_mp_wake_mailbox->apic_id = apicid;
399 acpi_mp_wake_mailbox->wakeup_vector = start_ip;
400 smp_store_release(&acpi_mp_wake_mailbox->command,
401 ACPI_MP_WAKE_COMMAND_WAKEUP);
402
403 /*
404 * Wait for the CPU to wake up.
405 *
406 * The CPU being woken up is essentially in a spin loop waiting to be
407 * woken up. It should not take long for it wake up and acknowledge by
408 * zeroing out ->command.
409 *
410 * ACPI specification doesn't provide any guidance on how long kernel
411 * has to wait for a wake up acknowledgement. It also doesn't provide
412 * a way to cancel a wake up request if it takes too long.
413 *
414 * In TDX environment, the VMM has control over how long it takes to
415 * wake up secondary. It can postpone scheduling secondary vCPU
416 * indefinitely. Giving up on wake up request and reporting error opens
417 * possible attack vector for VMM: it can wake up a secondary CPU when
418 * kernel doesn't expect it. Wait until positive result of the wake up
419 * request.
420 */
421 while (READ_ONCE(acpi_mp_wake_mailbox->command))
422 cpu_relax();
423
424 return 0;
425}
426#endif /* CONFIG_X86_64 */
427#endif /* CONFIG_X86_LOCAL_APIC */
428
429#ifdef CONFIG_X86_IO_APIC
430#define MP_ISA_BUS 0
431
432static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
433 u8 trigger, u32 gsi);
434
435static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
436 u32 gsi)
437{
438 /*
439 * Check bus_irq boundary.
440 */
441 if (bus_irq >= NR_IRQS_LEGACY) {
442 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
443 return;
444 }
445
446 /*
447 * TBD: This check is for faulty timer entries, where the override
448 * erroneously sets the trigger to level, resulting in a HUGE
449 * increase of timer interrupts!
450 */
451 if ((bus_irq == 0) && (trigger == 3))
452 trigger = 1;
453
454 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
455 return;
456 /*
457 * Reset default identity mapping if gsi is also an legacy IRQ,
458 * otherwise there will be more than one entry with the same GSI
459 * and acpi_isa_irq_to_gsi() may give wrong result.
460 */
461 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
462 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
463 isa_irq_to_gsi[bus_irq] = gsi;
464}
465
466static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
467 int polarity)
468{
469#ifdef CONFIG_X86_MPPARSE
470 struct mpc_intsrc mp_irq;
471 struct pci_dev *pdev;
472 unsigned char number;
473 unsigned int devfn;
474 int ioapic;
475 u8 pin;
476
477 if (!acpi_ioapic)
478 return;
479 if (!dev || !dev_is_pci(dev))
480 return;
481
482 pdev = to_pci_dev(dev);
483 number = pdev->bus->number;
484 devfn = pdev->devfn;
485 pin = pdev->pin;
486 /* print the entry should happen on mptable identically */
487 mp_irq.type = MP_INTSRC;
488 mp_irq.irqtype = mp_INT;
489 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
490 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
491 mp_irq.srcbus = number;
492 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
493 ioapic = mp_find_ioapic(gsi);
494 mp_irq.dstapic = mpc_ioapic_id(ioapic);
495 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
496
497 mp_save_irq(&mp_irq);
498#endif
499}
500
501static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
502 u8 trigger, u32 gsi)
503{
504 struct mpc_intsrc mp_irq;
505 int ioapic, pin;
506
507 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
508 ioapic = mp_find_ioapic(gsi);
509 if (ioapic < 0) {
510 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
511 return ioapic;
512 }
513
514 pin = mp_find_ioapic_pin(ioapic, gsi);
515
516 mp_irq.type = MP_INTSRC;
517 mp_irq.irqtype = mp_INT;
518 mp_irq.irqflag = (trigger << 2) | polarity;
519 mp_irq.srcbus = MP_ISA_BUS;
520 mp_irq.srcbusirq = bus_irq;
521 mp_irq.dstapic = mpc_ioapic_id(ioapic);
522 mp_irq.dstirq = pin;
523
524 mp_save_irq(&mp_irq);
525
526 return 0;
527}
528
529static int __init
530acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
531{
532 struct acpi_madt_io_apic *ioapic = NULL;
533 struct ioapic_domain_cfg cfg = {
534 .type = IOAPIC_DOMAIN_DYNAMIC,
535 .ops = &mp_ioapic_irqdomain_ops,
536 };
537
538 ioapic = (struct acpi_madt_io_apic *)header;
539
540 if (BAD_MADT_ENTRY(ioapic, end))
541 return -EINVAL;
542
543 acpi_table_print_madt_entry(&header->common);
544
545 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
546 if (ioapic->global_irq_base < nr_legacy_irqs())
547 cfg.type = IOAPIC_DOMAIN_LEGACY;
548
549 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
550 &cfg);
551
552 return 0;
553}
554
555/*
556 * Parse Interrupt Source Override for the ACPI SCI
557 */
558static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
559{
560 if (trigger == 0) /* compatible SCI trigger is level */
561 trigger = 3;
562
563 if (polarity == 0) /* compatible SCI polarity is low */
564 polarity = 3;
565
566 /* Command-line over-ride via acpi_sci= */
567 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
568 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
569
570 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
571 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
572
573 if (bus_irq < NR_IRQS_LEGACY)
574 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
575 else
576 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
577
578 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
579
580 /*
581 * stash over-ride to indicate we've been here
582 * and for later update of acpi_gbl_FADT
583 */
584 acpi_sci_override_gsi = gsi;
585 return;
586}
587
588static int __init
589acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
590 const unsigned long end)
591{
592 struct acpi_madt_interrupt_override *intsrc = NULL;
593
594 intsrc = (struct acpi_madt_interrupt_override *)header;
595
596 if (BAD_MADT_ENTRY(intsrc, end))
597 return -EINVAL;
598
599 acpi_table_print_madt_entry(&header->common);
600
601 if (intsrc->source_irq < NR_IRQS_LEGACY)
602 acpi_int_src_ovr[intsrc->source_irq] = true;
603
604 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
605 acpi_sci_ioapic_setup(intsrc->source_irq,
606 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
607 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
608 intsrc->global_irq);
609 return 0;
610 }
611
612 if (intsrc->source_irq == 0) {
613 if (acpi_skip_timer_override) {
614 pr_warn("BIOS IRQ0 override ignored.\n");
615 return 0;
616 }
617
618 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
619 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
620 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
621 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
622 }
623 }
624
625 mp_override_legacy_irq(intsrc->source_irq,
626 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
627 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
628 intsrc->global_irq);
629
630 return 0;
631}
632
633static int __init
634acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
635{
636 struct acpi_madt_nmi_source *nmi_src = NULL;
637
638 nmi_src = (struct acpi_madt_nmi_source *)header;
639
640 if (BAD_MADT_ENTRY(nmi_src, end))
641 return -EINVAL;
642
643 acpi_table_print_madt_entry(&header->common);
644
645 /* TBD: Support nimsrc entries? */
646
647 return 0;
648}
649
650#endif /* CONFIG_X86_IO_APIC */
651
652/*
653 * acpi_pic_sci_set_trigger()
654 *
655 * use ELCR to set PIC-mode trigger type for SCI
656 *
657 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
658 * it may require Edge Trigger -- use "acpi_sci=edge"
659 *
660 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers
661 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
662 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
663 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
664 */
665
666void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
667{
668 unsigned int mask = 1 << irq;
669 unsigned int old, new;
670
671 /* Real old ELCR mask */
672 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
673
674 /*
675 * If we use ACPI to set PCI IRQs, then we should clear ELCR
676 * since we will set it correctly as we enable the PCI irq
677 * routing.
678 */
679 new = acpi_noirq ? old : 0;
680
681 /*
682 * Update SCI information in the ELCR, it isn't in the PCI
683 * routing tables..
684 */
685 switch (trigger) {
686 case 1: /* Edge - clear */
687 new &= ~mask;
688 break;
689 case 3: /* Level - set */
690 new |= mask;
691 break;
692 }
693
694 if (old == new)
695 return;
696
697 pr_warn("setting ELCR to %04x (from %04x)\n", new, old);
698 outb(new, PIC_ELCR1);
699 outb(new >> 8, PIC_ELCR2);
700}
701
702int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
703{
704 int rc, irq, trigger, polarity;
705
706 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
707 *irqp = gsi;
708 return 0;
709 }
710
711 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
712 if (rc)
713 return rc;
714
715 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
716 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
717 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
718 if (irq < 0)
719 return irq;
720
721 *irqp = irq;
722 return 0;
723}
724EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
725
726int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
727{
728 if (isa_irq < nr_legacy_irqs() &&
729 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
730 *gsi = isa_irq_to_gsi[isa_irq];
731 return 0;
732 }
733
734 return -1;
735}
736
737static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
738 int trigger, int polarity)
739{
740#ifdef CONFIG_PCI
741 /*
742 * Make sure all (legacy) PCI IRQs are set as level-triggered.
743 */
744 if (trigger == ACPI_LEVEL_SENSITIVE)
745 elcr_set_level_irq(gsi);
746#endif
747
748 return gsi;
749}
750
751#ifdef CONFIG_X86_LOCAL_APIC
752static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
753 int trigger, int polarity)
754{
755 int irq = gsi;
756#ifdef CONFIG_X86_IO_APIC
757 int node;
758 struct irq_alloc_info info;
759
760 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
761 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
762 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
763 ioapic_set_alloc_attr(&info, node, trigger, polarity);
764
765 mutex_lock(&acpi_ioapic_lock);
766 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
767 /* Don't set up the ACPI SCI because it's already set up */
768 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
769 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
770 mutex_unlock(&acpi_ioapic_lock);
771#endif
772
773 return irq;
774}
775
776static void acpi_unregister_gsi_ioapic(u32 gsi)
777{
778#ifdef CONFIG_X86_IO_APIC
779 int irq;
780
781 mutex_lock(&acpi_ioapic_lock);
782 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
783 if (irq > 0)
784 mp_unmap_irq(irq);
785 mutex_unlock(&acpi_ioapic_lock);
786#endif
787}
788#endif
789
790int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
791 int trigger, int polarity) = acpi_register_gsi_pic;
792void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
793
794#ifdef CONFIG_ACPI_SLEEP
795int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
796#else
797int (*acpi_suspend_lowlevel)(void);
798#endif
799
800/*
801 * success: return IRQ number (>=0)
802 * failure: return < 0
803 */
804int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
805{
806 return __acpi_register_gsi(dev, gsi, trigger, polarity);
807}
808EXPORT_SYMBOL_GPL(acpi_register_gsi);
809
810void acpi_unregister_gsi(u32 gsi)
811{
812 if (__acpi_unregister_gsi)
813 __acpi_unregister_gsi(gsi);
814}
815EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
816
817#ifdef CONFIG_X86_LOCAL_APIC
818static void __init acpi_set_irq_model_ioapic(void)
819{
820 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
821 __acpi_register_gsi = acpi_register_gsi_ioapic;
822 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
823 acpi_ioapic = 1;
824}
825#endif
826
827/*
828 * ACPI based hotplug support for CPU
829 */
830#ifdef CONFIG_ACPI_HOTPLUG_CPU
831#include <acpi/processor.h>
832
833static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
834{
835#ifdef CONFIG_ACPI_NUMA
836 int nid;
837
838 nid = acpi_get_node(handle);
839 if (nid != NUMA_NO_NODE) {
840 set_apicid_to_node(physid, nid);
841 numa_set_node(cpu, nid);
842 }
843#endif
844 return 0;
845}
846
847int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
848 int *pcpu)
849{
850 int cpu;
851
852 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
853 if (cpu < 0) {
854 pr_info("Unable to map lapic to logical cpu number\n");
855 return cpu;
856 }
857
858 acpi_processor_set_pdc(handle);
859 acpi_map_cpu2node(handle, cpu, physid);
860
861 *pcpu = cpu;
862 return 0;
863}
864EXPORT_SYMBOL(acpi_map_cpu);
865
866int acpi_unmap_cpu(int cpu)
867{
868#ifdef CONFIG_ACPI_NUMA
869 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
870#endif
871
872 per_cpu(x86_cpu_to_apicid, cpu) = BAD_APICID;
873 set_cpu_present(cpu, false);
874 num_processors--;
875
876 return (0);
877}
878EXPORT_SYMBOL(acpi_unmap_cpu);
879#endif /* CONFIG_ACPI_HOTPLUG_CPU */
880
881int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
882{
883 int ret = -ENOSYS;
884#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
885 int ioapic_id;
886 u64 addr;
887 struct ioapic_domain_cfg cfg = {
888 .type = IOAPIC_DOMAIN_DYNAMIC,
889 .ops = &mp_ioapic_irqdomain_ops,
890 };
891
892 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
893 if (ioapic_id < 0) {
894 unsigned long long uid;
895 acpi_status status;
896
897 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
898 NULL, &uid);
899 if (ACPI_FAILURE(status)) {
900 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
901 return -EINVAL;
902 }
903 ioapic_id = (int)uid;
904 }
905
906 mutex_lock(&acpi_ioapic_lock);
907 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
908 mutex_unlock(&acpi_ioapic_lock);
909#endif
910
911 return ret;
912}
913EXPORT_SYMBOL(acpi_register_ioapic);
914
915int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
916{
917 int ret = -ENOSYS;
918
919#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
920 mutex_lock(&acpi_ioapic_lock);
921 ret = mp_unregister_ioapic(gsi_base);
922 mutex_unlock(&acpi_ioapic_lock);
923#endif
924
925 return ret;
926}
927EXPORT_SYMBOL(acpi_unregister_ioapic);
928
929/**
930 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base
931 * has been registered
932 * @handle: ACPI handle of the IOAPIC device
933 * @gsi_base: GSI base associated with the IOAPIC
934 *
935 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
936 * with acpi_register_ioapic()/acpi_unregister_ioapic().
937 */
938int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
939{
940 int ret = 0;
941
942#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
943 mutex_lock(&acpi_ioapic_lock);
944 ret = mp_ioapic_registered(gsi_base);
945 mutex_unlock(&acpi_ioapic_lock);
946#endif
947
948 return ret;
949}
950
951static int __init acpi_parse_sbf(struct acpi_table_header *table)
952{
953 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
954
955 sbf_port = sb->cmos_index; /* Save CMOS port */
956
957 return 0;
958}
959
960#ifdef CONFIG_HPET_TIMER
961#include <asm/hpet.h>
962
963static struct resource *hpet_res __initdata;
964
965static int __init acpi_parse_hpet(struct acpi_table_header *table)
966{
967 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
968
969 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
970 pr_warn("HPET timers must be located in memory.\n");
971 return -1;
972 }
973
974 hpet_address = hpet_tbl->address.address;
975 hpet_blockid = hpet_tbl->sequence;
976
977 /*
978 * Some broken BIOSes advertise HPET at 0x0. We really do not
979 * want to allocate a resource there.
980 */
981 if (!hpet_address) {
982 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address);
983 return 0;
984 }
985#ifdef CONFIG_X86_64
986 /*
987 * Some even more broken BIOSes advertise HPET at
988 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
989 * some noise:
990 */
991 if (hpet_address == 0xfed0000000000000UL) {
992 if (!hpet_force_user) {
993 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n",
994 hpet_tbl->id);
995 hpet_address = 0;
996 return 0;
997 }
998 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n",
999 hpet_tbl->id);
1000 hpet_address >>= 32;
1001 }
1002#endif
1003 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address);
1004
1005 /*
1006 * Allocate and initialize the HPET firmware resource for adding into
1007 * the resource tree during the lateinit timeframe.
1008 */
1009#define HPET_RESOURCE_NAME_SIZE 9
1010 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
1011 SMP_CACHE_BYTES);
1012 if (!hpet_res)
1013 panic("%s: Failed to allocate %zu bytes\n", __func__,
1014 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
1015
1016 hpet_res->name = (void *)&hpet_res[1];
1017 hpet_res->flags = IORESOURCE_MEM;
1018 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
1019 hpet_tbl->sequence);
1020
1021 hpet_res->start = hpet_address;
1022 hpet_res->end = hpet_address + (1 * 1024) - 1;
1023
1024 return 0;
1025}
1026
1027/*
1028 * hpet_insert_resource inserts the HPET resources used into the resource
1029 * tree.
1030 */
1031static __init int hpet_insert_resource(void)
1032{
1033 if (!hpet_res)
1034 return 1;
1035
1036 return insert_resource(&iomem_resource, hpet_res);
1037}
1038
1039late_initcall(hpet_insert_resource);
1040
1041#else
1042#define acpi_parse_hpet NULL
1043#endif
1044
1045static int __init acpi_parse_fadt(struct acpi_table_header *table)
1046{
1047 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
1048 pr_debug("no legacy devices present\n");
1049 x86_platform.legacy.devices.pnpbios = 0;
1050 }
1051
1052 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
1053 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
1054 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
1055 pr_debug("i8042 controller is absent\n");
1056 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
1057 }
1058
1059 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
1060 pr_debug("not registering RTC platform device\n");
1061 x86_platform.legacy.rtc = 0;
1062 }
1063
1064 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
1065 pr_debug("probing for VGA not safe\n");
1066 x86_platform.legacy.no_vga = 1;
1067 }
1068
1069#ifdef CONFIG_X86_PM_TIMER
1070 /* detect the location of the ACPI PM Timer */
1071 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
1072 /* FADT rev. 2 */
1073 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
1074 ACPI_ADR_SPACE_SYSTEM_IO)
1075 return 0;
1076
1077 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
1078 /*
1079 * "X" fields are optional extensions to the original V1.0
1080 * fields, so we must selectively expand V1.0 fields if the
1081 * corresponding X field is zero.
1082 */
1083 if (!pmtmr_ioport)
1084 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1085 } else {
1086 /* FADT rev. 1 */
1087 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1088 }
1089 if (pmtmr_ioport)
1090 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport);
1091#endif
1092 return 0;
1093}
1094
1095#ifdef CONFIG_X86_LOCAL_APIC
1096/*
1097 * Parse LAPIC entries in MADT
1098 * returns 0 on success, < 0 on error
1099 */
1100
1101static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1102{
1103 int count;
1104
1105 if (!boot_cpu_has(X86_FEATURE_APIC))
1106 return -ENODEV;
1107
1108 /*
1109 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1110 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1111 */
1112
1113 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1114 acpi_parse_lapic_addr_ovr, 0);
1115 if (count < 0) {
1116 pr_err("Error parsing LAPIC address override entry\n");
1117 return count;
1118 }
1119
1120 register_lapic_address(acpi_lapic_addr);
1121
1122 return count;
1123}
1124
1125static int __init acpi_parse_madt_lapic_entries(void)
1126{
1127 int count, x2count = 0;
1128
1129 if (!boot_cpu_has(X86_FEATURE_APIC))
1130 return -ENODEV;
1131
1132 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1133 acpi_parse_sapic, MAX_LOCAL_APIC);
1134
1135 if (!count) {
1136 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
1137 acpi_parse_lapic, MAX_LOCAL_APIC);
1138 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
1139 acpi_parse_x2apic, MAX_LOCAL_APIC);
1140 }
1141 if (!count && !x2count) {
1142 pr_err("No LAPIC entries present\n");
1143 /* TBD: Cleanup to allow fallback to MPS */
1144 return -ENODEV;
1145 } else if (count < 0 || x2count < 0) {
1146 pr_err("Error parsing LAPIC entry\n");
1147 /* TBD: Cleanup to allow fallback to MPS */
1148 return count;
1149 }
1150
1151 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1152 acpi_parse_x2apic_nmi, 0);
1153 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1154 acpi_parse_lapic_nmi, 0);
1155 if (count < 0 || x2count < 0) {
1156 pr_err("Error parsing LAPIC NMI entry\n");
1157 /* TBD: Cleanup to allow fallback to MPS */
1158 return count;
1159 }
1160 return 0;
1161}
1162
1163#ifdef CONFIG_X86_64
1164static int __init acpi_parse_mp_wake(union acpi_subtable_headers *header,
1165 const unsigned long end)
1166{
1167 struct acpi_madt_multiproc_wakeup *mp_wake;
1168
1169 if (!IS_ENABLED(CONFIG_SMP))
1170 return -ENODEV;
1171
1172 mp_wake = (struct acpi_madt_multiproc_wakeup *)header;
1173 if (BAD_MADT_ENTRY(mp_wake, end))
1174 return -EINVAL;
1175
1176 acpi_table_print_madt_entry(&header->common);
1177
1178 acpi_mp_wake_mailbox_paddr = mp_wake->base_address;
1179
1180 apic_update_callback(wakeup_secondary_cpu_64, acpi_wakeup_cpu);
1181
1182 return 0;
1183}
1184#endif /* CONFIG_X86_64 */
1185#endif /* CONFIG_X86_LOCAL_APIC */
1186
1187#ifdef CONFIG_X86_IO_APIC
1188static void __init mp_config_acpi_legacy_irqs(void)
1189{
1190 int i;
1191 struct mpc_intsrc mp_irq;
1192
1193#ifdef CONFIG_EISA
1194 /*
1195 * Fabricate the legacy ISA bus (bus #31).
1196 */
1197 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1198#endif
1199 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1200 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1201
1202 /*
1203 * Use the default configuration for the IRQs 0-15. Unless
1204 * overridden by (MADT) interrupt source override entries.
1205 */
1206 for (i = 0; i < nr_legacy_irqs(); i++) {
1207 int ioapic, pin;
1208 unsigned int dstapic;
1209 int idx;
1210 u32 gsi;
1211
1212 /* Locate the gsi that irq i maps to. */
1213 if (acpi_isa_irq_to_gsi(i, &gsi))
1214 continue;
1215
1216 /*
1217 * Locate the IOAPIC that manages the ISA IRQ.
1218 */
1219 ioapic = mp_find_ioapic(gsi);
1220 if (ioapic < 0)
1221 continue;
1222 pin = mp_find_ioapic_pin(ioapic, gsi);
1223 dstapic = mpc_ioapic_id(ioapic);
1224
1225 for (idx = 0; idx < mp_irq_entries; idx++) {
1226 struct mpc_intsrc *irq = mp_irqs + idx;
1227
1228 /* Do we already have a mapping for this ISA IRQ? */
1229 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1230 break;
1231
1232 /* Do we already have a mapping for this IOAPIC pin */
1233 if (irq->dstapic == dstapic && irq->dstirq == pin)
1234 break;
1235 }
1236
1237 if (idx != mp_irq_entries) {
1238 pr_debug("ACPI: IRQ%d used by override.\n", i);
1239 continue; /* IRQ already used */
1240 }
1241
1242 mp_irq.type = MP_INTSRC;
1243 mp_irq.irqflag = 0; /* Conforming */
1244 mp_irq.srcbus = MP_ISA_BUS;
1245 mp_irq.dstapic = dstapic;
1246 mp_irq.irqtype = mp_INT;
1247 mp_irq.srcbusirq = i; /* Identity mapped */
1248 mp_irq.dstirq = pin;
1249
1250 mp_save_irq(&mp_irq);
1251 }
1252}
1253
1254/*
1255 * Parse IOAPIC related entries in MADT
1256 * returns 0 on success, < 0 on error
1257 */
1258static int __init acpi_parse_madt_ioapic_entries(void)
1259{
1260 int count;
1261
1262 /*
1263 * ACPI interpreter is required to complete interrupt setup,
1264 * so if it is off, don't enumerate the io-apics with ACPI.
1265 * If MPS is present, it will handle them,
1266 * otherwise the system will stay in PIC mode
1267 */
1268 if (acpi_disabled || acpi_noirq)
1269 return -ENODEV;
1270
1271 if (!boot_cpu_has(X86_FEATURE_APIC))
1272 return -ENODEV;
1273
1274 /*
1275 * if "noapic" boot option, don't look for IO-APICs
1276 */
1277 if (ioapic_is_disabled) {
1278 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n");
1279 return -ENODEV;
1280 }
1281
1282 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1283 MAX_IO_APICS);
1284 if (!count) {
1285 pr_err("No IOAPIC entries present\n");
1286 return -ENODEV;
1287 } else if (count < 0) {
1288 pr_err("Error parsing IOAPIC entry\n");
1289 return count;
1290 }
1291
1292 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1293 acpi_parse_int_src_ovr, nr_irqs);
1294 if (count < 0) {
1295 pr_err("Error parsing interrupt source overrides entry\n");
1296 /* TBD: Cleanup to allow fallback to MPS */
1297 return count;
1298 }
1299
1300 /*
1301 * If BIOS did not supply an INT_SRC_OVR for the SCI
1302 * pretend we got one so we can set the SCI flags.
1303 * But ignore setting up SCI on hardware reduced platforms.
1304 */
1305 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1306 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1307 acpi_gbl_FADT.sci_interrupt);
1308
1309 /* Fill in identity legacy mappings where no override */
1310 mp_config_acpi_legacy_irqs();
1311
1312 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1313 acpi_parse_nmi_src, nr_irqs);
1314 if (count < 0) {
1315 pr_err("Error parsing NMI SRC entry\n");
1316 /* TBD: Cleanup to allow fallback to MPS */
1317 return count;
1318 }
1319
1320 return 0;
1321}
1322#else
1323static inline int acpi_parse_madt_ioapic_entries(void)
1324{
1325 return -1;
1326}
1327#endif /* !CONFIG_X86_IO_APIC */
1328
1329static void __init early_acpi_process_madt(void)
1330{
1331#ifdef CONFIG_X86_LOCAL_APIC
1332 int error;
1333
1334 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1335
1336 /*
1337 * Parse MADT LAPIC entries
1338 */
1339 error = early_acpi_parse_madt_lapic_addr_ovr();
1340 if (!error) {
1341 acpi_lapic = 1;
1342 smp_found_config = 1;
1343 }
1344 if (error == -EINVAL) {
1345 /*
1346 * Dell Precision Workstation 410, 610 come here.
1347 */
1348 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1349 disable_acpi();
1350 }
1351 }
1352#endif
1353}
1354
1355static void __init acpi_process_madt(void)
1356{
1357#ifdef CONFIG_X86_LOCAL_APIC
1358 int error;
1359
1360 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1361
1362 /*
1363 * Parse MADT LAPIC entries
1364 */
1365 error = acpi_parse_madt_lapic_entries();
1366 if (!error) {
1367 acpi_lapic = 1;
1368
1369 /*
1370 * Parse MADT IO-APIC entries
1371 */
1372 mutex_lock(&acpi_ioapic_lock);
1373 error = acpi_parse_madt_ioapic_entries();
1374 mutex_unlock(&acpi_ioapic_lock);
1375 if (!error) {
1376 acpi_set_irq_model_ioapic();
1377
1378 smp_found_config = 1;
1379 }
1380
1381#ifdef CONFIG_X86_64
1382 /*
1383 * Parse MADT MP Wake entry.
1384 */
1385 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP,
1386 acpi_parse_mp_wake, 1);
1387#endif
1388 }
1389 if (error == -EINVAL) {
1390 /*
1391 * Dell Precision Workstation 410, 610 come here.
1392 */
1393 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1394 disable_acpi();
1395 }
1396 } else {
1397 /*
1398 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1399 * In the event an MPS table was found, forget it.
1400 * Boot with "acpi=off" to use MPS on such a system.
1401 */
1402 if (smp_found_config) {
1403 pr_warn("No APIC-table, disabling MPS\n");
1404 smp_found_config = 0;
1405 }
1406 }
1407
1408 /*
1409 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1410 * processors, where MPS only supports physical.
1411 */
1412 if (acpi_lapic && acpi_ioapic)
1413 pr_info("Using ACPI (MADT) for SMP configuration information\n");
1414 else if (acpi_lapic)
1415 pr_info("Using ACPI for processor (LAPIC) configuration information\n");
1416#endif
1417 return;
1418}
1419
1420static int __init disable_acpi_irq(const struct dmi_system_id *d)
1421{
1422 if (!acpi_force) {
1423 pr_notice("%s detected: force use of acpi=noirq\n", d->ident);
1424 acpi_noirq_set();
1425 }
1426 return 0;
1427}
1428
1429static int __init disable_acpi_pci(const struct dmi_system_id *d)
1430{
1431 if (!acpi_force) {
1432 pr_notice("%s detected: force use of pci=noacpi\n", d->ident);
1433 acpi_disable_pci();
1434 }
1435 return 0;
1436}
1437
1438static int __init disable_acpi_xsdt(const struct dmi_system_id *d)
1439{
1440 if (!acpi_force) {
1441 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident);
1442 acpi_gbl_do_not_use_xsdt = TRUE;
1443 } else {
1444 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n");
1445 }
1446 return 0;
1447}
1448
1449static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1450{
1451 if (!acpi_force) {
1452 pr_notice("%s detected: acpi off\n", d->ident);
1453 disable_acpi();
1454 } else {
1455 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n");
1456 }
1457 return 0;
1458}
1459
1460/*
1461 * Force ignoring BIOS IRQ0 override
1462 */
1463static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1464{
1465 if (!acpi_skip_timer_override) {
1466 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1467 d->ident);
1468 acpi_skip_timer_override = 1;
1469 }
1470 return 0;
1471}
1472
1473/*
1474 * ACPI offers an alternative platform interface model that removes
1475 * ACPI hardware requirements for platforms that do not implement
1476 * the PC Architecture.
1477 *
1478 * We initialize the Hardware-reduced ACPI model here:
1479 */
1480void __init acpi_generic_reduced_hw_init(void)
1481{
1482 /*
1483 * Override x86_init functions and bypass legacy PIC in
1484 * hardware reduced ACPI mode.
1485 */
1486 x86_init.timers.timer_init = x86_init_noop;
1487 x86_init.irqs.pre_vector_init = x86_init_noop;
1488 legacy_pic = &null_legacy_pic;
1489}
1490
1491static void __init acpi_reduced_hw_init(void)
1492{
1493 if (acpi_gbl_reduced_hardware)
1494 x86_init.acpi.reduced_hw_early_init();
1495}
1496
1497/*
1498 * If your system is blacklisted here, but you find that acpi=force
1499 * works for you, please contact linux-acpi@vger.kernel.org
1500 */
1501static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1502 /*
1503 * Boxes that need ACPI disabled
1504 */
1505 {
1506 .callback = dmi_disable_acpi,
1507 .ident = "IBM Thinkpad",
1508 .matches = {
1509 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1510 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1511 },
1512 },
1513
1514 /*
1515 * Boxes that need ACPI PCI IRQ routing disabled
1516 */
1517 {
1518 .callback = disable_acpi_irq,
1519 .ident = "ASUS A7V",
1520 .matches = {
1521 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1522 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1523 /* newer BIOS, Revision 1011, does work */
1524 DMI_MATCH(DMI_BIOS_VERSION,
1525 "ASUS A7V ACPI BIOS Revision 1007"),
1526 },
1527 },
1528 {
1529 /*
1530 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1531 * for LPC bridge, which is needed for the PCI
1532 * interrupt links to work. DSDT fix is in bug 5966.
1533 * 2645, 2646 model numbers are shared with 600/600E/600X
1534 */
1535 .callback = disable_acpi_irq,
1536 .ident = "IBM Thinkpad 600 Series 2645",
1537 .matches = {
1538 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1539 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1540 },
1541 },
1542 {
1543 .callback = disable_acpi_irq,
1544 .ident = "IBM Thinkpad 600 Series 2646",
1545 .matches = {
1546 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1547 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1548 },
1549 },
1550 /*
1551 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1552 */
1553 { /* _BBN 0 bug */
1554 .callback = disable_acpi_pci,
1555 .ident = "ASUS PR-DLS",
1556 .matches = {
1557 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1558 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1559 DMI_MATCH(DMI_BIOS_VERSION,
1560 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1561 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1562 },
1563 },
1564 {
1565 .callback = disable_acpi_pci,
1566 .ident = "Acer TravelMate 36x Laptop",
1567 .matches = {
1568 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1569 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1570 },
1571 },
1572 /*
1573 * Boxes that need ACPI XSDT use disabled due to corrupted tables
1574 */
1575 {
1576 .callback = disable_acpi_xsdt,
1577 .ident = "Advantech DAC-BJ01",
1578 .matches = {
1579 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1580 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"),
1581 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"),
1582 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"),
1583 },
1584 },
1585 {}
1586};
1587
1588/* second table for DMI checks that should run after early-quirks */
1589static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1590 /*
1591 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1592 * which includes some code which overrides all temperature
1593 * trip points to 16C if the INTIN2 input of the I/O APIC
1594 * is enabled. This input is incorrectly designated the
1595 * ISA IRQ 0 via an interrupt source override even though
1596 * it is wired to the output of the master 8259A and INTIN0
1597 * is not connected at all. Force ignoring BIOS IRQ0
1598 * override in that cases.
1599 */
1600 {
1601 .callback = dmi_ignore_irq0_timer_override,
1602 .ident = "HP nx6115 laptop",
1603 .matches = {
1604 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1605 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1606 },
1607 },
1608 {
1609 .callback = dmi_ignore_irq0_timer_override,
1610 .ident = "HP NX6125 laptop",
1611 .matches = {
1612 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1613 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1614 },
1615 },
1616 {
1617 .callback = dmi_ignore_irq0_timer_override,
1618 .ident = "HP NX6325 laptop",
1619 .matches = {
1620 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1621 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1622 },
1623 },
1624 {
1625 .callback = dmi_ignore_irq0_timer_override,
1626 .ident = "HP 6715b laptop",
1627 .matches = {
1628 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1629 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1630 },
1631 },
1632 {
1633 .callback = dmi_ignore_irq0_timer_override,
1634 .ident = "FUJITSU SIEMENS",
1635 .matches = {
1636 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1637 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1638 },
1639 },
1640 {}
1641};
1642
1643/*
1644 * acpi_boot_table_init() and acpi_boot_init()
1645 * called from setup_arch(), always.
1646 * 1. checksums all tables
1647 * 2. enumerates lapics
1648 * 3. enumerates io-apics
1649 *
1650 * acpi_table_init() is separate to allow reading SRAT without
1651 * other side effects.
1652 *
1653 * side effects of acpi_boot_init:
1654 * acpi_lapic = 1 if LAPIC found
1655 * acpi_ioapic = 1 if IOAPIC found
1656 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1657 * if acpi_blacklisted() acpi_disabled = 1;
1658 * acpi_irq_model=...
1659 * ...
1660 */
1661
1662void __init acpi_boot_table_init(void)
1663{
1664 dmi_check_system(acpi_dmi_table);
1665
1666 /*
1667 * If acpi_disabled, bail out
1668 */
1669 if (acpi_disabled)
1670 return;
1671
1672 /*
1673 * Initialize the ACPI boot-time table parser.
1674 */
1675 if (acpi_locate_initial_tables())
1676 disable_acpi();
1677 else
1678 acpi_reserve_initial_tables();
1679}
1680
1681int __init early_acpi_boot_init(void)
1682{
1683 if (acpi_disabled)
1684 return 1;
1685
1686 acpi_table_init_complete();
1687
1688 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1689
1690 /*
1691 * blacklist may disable ACPI entirely
1692 */
1693 if (acpi_blacklisted()) {
1694 if (acpi_force) {
1695 pr_warn("acpi=force override\n");
1696 } else {
1697 pr_warn("Disabling ACPI support\n");
1698 disable_acpi();
1699 return 1;
1700 }
1701 }
1702
1703 /*
1704 * Process the Multiple APIC Description Table (MADT), if present
1705 */
1706 early_acpi_process_madt();
1707
1708 /*
1709 * Hardware-reduced ACPI mode initialization:
1710 */
1711 acpi_reduced_hw_init();
1712
1713 return 0;
1714}
1715
1716int __init acpi_boot_init(void)
1717{
1718 /* those are executed after early-quirks are executed */
1719 dmi_check_system(acpi_dmi_table_late);
1720
1721 /*
1722 * If acpi_disabled, bail out
1723 */
1724 if (acpi_disabled)
1725 return 1;
1726
1727 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1728
1729 /*
1730 * set sci_int and PM timer address
1731 */
1732 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1733
1734 /*
1735 * Process the Multiple APIC Description Table (MADT), if present
1736 */
1737 acpi_process_madt();
1738
1739 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1740 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1741 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1742
1743 if (!acpi_noirq)
1744 x86_init.pci.init = pci_acpi_init;
1745
1746 /* Do not enable ACPI SPCR console by default */
1747 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1748 return 0;
1749}
1750
1751static int __init parse_acpi(char *arg)
1752{
1753 if (!arg)
1754 return -EINVAL;
1755
1756 /* "acpi=off" disables both ACPI table parsing and interpreter */
1757 if (strcmp(arg, "off") == 0) {
1758 disable_acpi();
1759 }
1760 /* acpi=force to over-ride black-list */
1761 else if (strcmp(arg, "force") == 0) {
1762 acpi_force = 1;
1763 acpi_disabled = 0;
1764 }
1765 /* acpi=strict disables out-of-spec workarounds */
1766 else if (strcmp(arg, "strict") == 0) {
1767 acpi_strict = 1;
1768 }
1769 /* acpi=rsdt use RSDT instead of XSDT */
1770 else if (strcmp(arg, "rsdt") == 0) {
1771 acpi_gbl_do_not_use_xsdt = TRUE;
1772 }
1773 /* "acpi=noirq" disables ACPI interrupt routing */
1774 else if (strcmp(arg, "noirq") == 0) {
1775 acpi_noirq_set();
1776 }
1777 /* "acpi=copy_dsdt" copies DSDT */
1778 else if (strcmp(arg, "copy_dsdt") == 0) {
1779 acpi_gbl_copy_dsdt_locally = 1;
1780 }
1781 /* "acpi=nocmcff" disables FF mode for corrected errors */
1782 else if (strcmp(arg, "nocmcff") == 0) {
1783 acpi_disable_cmcff = 1;
1784 } else {
1785 /* Core will printk when we return error. */
1786 return -EINVAL;
1787 }
1788 return 0;
1789}
1790early_param("acpi", parse_acpi);
1791
1792static int __init parse_acpi_bgrt(char *arg)
1793{
1794 acpi_nobgrt = true;
1795 return 0;
1796}
1797early_param("bgrt_disable", parse_acpi_bgrt);
1798
1799/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1800static int __init parse_pci(char *arg)
1801{
1802 if (arg && strcmp(arg, "noacpi") == 0)
1803 acpi_disable_pci();
1804 return 0;
1805}
1806early_param("pci", parse_pci);
1807
1808int __init acpi_mps_check(void)
1809{
1810#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1811/* mptable code is not built-in*/
1812 if (acpi_disabled || acpi_noirq) {
1813 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n");
1814 return 1;
1815 }
1816#endif
1817 return 0;
1818}
1819
1820#ifdef CONFIG_X86_IO_APIC
1821static int __init parse_acpi_skip_timer_override(char *arg)
1822{
1823 acpi_skip_timer_override = 1;
1824 return 0;
1825}
1826early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1827
1828static int __init parse_acpi_use_timer_override(char *arg)
1829{
1830 acpi_use_timer_override = 1;
1831 return 0;
1832}
1833early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1834#endif /* CONFIG_X86_IO_APIC */
1835
1836static int __init setup_acpi_sci(char *s)
1837{
1838 if (!s)
1839 return -EINVAL;
1840 if (!strcmp(s, "edge"))
1841 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1842 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1843 else if (!strcmp(s, "level"))
1844 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1845 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1846 else if (!strcmp(s, "high"))
1847 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1848 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1849 else if (!strcmp(s, "low"))
1850 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1851 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1852 else
1853 return -EINVAL;
1854 return 0;
1855}
1856early_param("acpi_sci", setup_acpi_sci);
1857
1858int __acpi_acquire_global_lock(unsigned int *lock)
1859{
1860 unsigned int old, new, val;
1861
1862 old = READ_ONCE(*lock);
1863 do {
1864 val = (old >> 1) & 0x1;
1865 new = (old & ~0x3) + 2 + val;
1866 } while (!try_cmpxchg(lock, &old, new));
1867
1868 if (val)
1869 return 0;
1870
1871 return -1;
1872}
1873
1874int __acpi_release_global_lock(unsigned int *lock)
1875{
1876 unsigned int old, new;
1877
1878 old = READ_ONCE(*lock);
1879 do {
1880 new = old & ~0x3;
1881 } while (!try_cmpxchg(lock, &old, new));
1882 return old & 0x1;
1883}
1884
1885void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1886{
1887 e820__range_add(addr, size, E820_TYPE_NVS);
1888 e820__update_table_print();
1889}
1890
1891void x86_default_set_root_pointer(u64 addr)
1892{
1893 boot_params.acpi_rsdp_addr = addr;
1894}
1895
1896u64 x86_default_get_root_pointer(void)
1897{
1898 return boot_params.acpi_rsdp_addr;
1899}
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
9#include <linux/init.h>
10#include <linux/acpi.h>
11#include <linux/acpi_pmtmr.h>
12#include <linux/efi.h>
13#include <linux/cpumask.h>
14#include <linux/export.h>
15#include <linux/dmi.h>
16#include <linux/irq.h>
17#include <linux/slab.h>
18#include <linux/memblock.h>
19#include <linux/ioport.h>
20#include <linux/pci.h>
21#include <linux/efi-bgrt.h>
22#include <linux/serial_core.h>
23
24#include <asm/e820/api.h>
25#include <asm/irqdomain.h>
26#include <asm/pci_x86.h>
27#include <asm/pgtable.h>
28#include <asm/io_apic.h>
29#include <asm/apic.h>
30#include <asm/io.h>
31#include <asm/mpspec.h>
32#include <asm/smp.h>
33#include <asm/i8259.h>
34#include <asm/setup.h>
35
36#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
37static int __initdata acpi_force = 0;
38int acpi_disabled;
39EXPORT_SYMBOL(acpi_disabled);
40
41#ifdef CONFIG_X86_64
42# include <asm/proto.h>
43#endif /* X86 */
44
45#define PREFIX "ACPI: "
46
47int acpi_noirq; /* skip ACPI IRQ initialization */
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;
55
56/* ACPI SCI override configuration */
57u8 acpi_sci_flags __initdata;
58u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
59int acpi_skip_timer_override __initdata;
60int acpi_use_timer_override __initdata;
61int acpi_fix_pin2_polarity __initdata;
62
63#ifdef CONFIG_X86_LOCAL_APIC
64static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
65#endif
66
67#ifdef CONFIG_X86_IO_APIC
68/*
69 * Locks related to IOAPIC hotplug
70 * Hotplug side:
71 * ->device_hotplug_lock
72 * ->acpi_ioapic_lock
73 * ->ioapic_lock
74 * Interrupt mapping side:
75 * ->acpi_ioapic_lock
76 * ->ioapic_mutex
77 * ->ioapic_lock
78 */
79static DEFINE_MUTEX(acpi_ioapic_lock);
80#endif
81
82/* --------------------------------------------------------------------------
83 Boot-time Configuration
84 -------------------------------------------------------------------------- */
85
86/*
87 * The default interrupt routing model is PIC (8259). This gets
88 * overridden if IOAPICs are enumerated (below).
89 */
90enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
91
92
93/*
94 * ISA irqs by default are the first 16 gsis but can be
95 * any gsi as specified by an interrupt source override.
96 */
97static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
98 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
99};
100
101/*
102 * This is just a simple wrapper around early_memremap(),
103 * with sanity checks for phys == 0 and size == 0.
104 */
105void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
106{
107
108 if (!phys || !size)
109 return NULL;
110
111 return early_memremap(phys, size);
112}
113
114void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
115{
116 if (!map || !size)
117 return;
118
119 early_memunmap(map, size);
120}
121
122#ifdef CONFIG_X86_LOCAL_APIC
123static int __init acpi_parse_madt(struct acpi_table_header *table)
124{
125 struct acpi_table_madt *madt = NULL;
126
127 if (!boot_cpu_has(X86_FEATURE_APIC))
128 return -EINVAL;
129
130 madt = (struct acpi_table_madt *)table;
131 if (!madt) {
132 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
133 return -ENODEV;
134 }
135
136 if (madt->address) {
137 acpi_lapic_addr = (u64) madt->address;
138
139 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
140 madt->address);
141 }
142
143 default_acpi_madt_oem_check(madt->header.oem_id,
144 madt->header.oem_table_id);
145
146 return 0;
147}
148
149/**
150 * acpi_register_lapic - register a local apic and generates a logic cpu number
151 * @id: local apic id to register
152 * @acpiid: ACPI id to register
153 * @enabled: this cpu is enabled or not
154 *
155 * Returns the logic cpu number which maps to the local apic
156 */
157static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
158{
159 unsigned int ver = 0;
160 int cpu;
161
162 if (id >= MAX_LOCAL_APIC) {
163 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
164 return -EINVAL;
165 }
166
167 if (!enabled) {
168 ++disabled_cpus;
169 return -EINVAL;
170 }
171
172 if (boot_cpu_physical_apicid != -1U)
173 ver = boot_cpu_apic_version;
174
175 cpu = generic_processor_info(id, ver);
176 if (cpu >= 0)
177 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
178
179 return cpu;
180}
181
182static int __init
183acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
184{
185 struct acpi_madt_local_x2apic *processor = NULL;
186#ifdef CONFIG_X86_X2APIC
187 u32 apic_id;
188 u8 enabled;
189#endif
190
191 processor = (struct acpi_madt_local_x2apic *)header;
192
193 if (BAD_MADT_ENTRY(processor, end))
194 return -EINVAL;
195
196 acpi_table_print_madt_entry(&header->common);
197
198#ifdef CONFIG_X86_X2APIC
199 apic_id = processor->local_apic_id;
200 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
201
202 /* Ignore invalid ID */
203 if (apic_id == 0xffffffff)
204 return 0;
205
206 /*
207 * We need to register disabled CPU as well to permit
208 * counting disabled CPUs. This allows us to size
209 * cpus_possible_map more accurately, to permit
210 * to not preallocating memory for all NR_CPUS
211 * when we use CPU hotplug.
212 */
213 if (!apic->apic_id_valid(apic_id)) {
214 if (enabled)
215 pr_warn(PREFIX "x2apic entry ignored\n");
216 return 0;
217 }
218
219 acpi_register_lapic(apic_id, processor->uid, enabled);
220#else
221 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
222#endif
223
224 return 0;
225}
226
227static int __init
228acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
229{
230 struct acpi_madt_local_apic *processor = NULL;
231
232 processor = (struct acpi_madt_local_apic *)header;
233
234 if (BAD_MADT_ENTRY(processor, end))
235 return -EINVAL;
236
237 acpi_table_print_madt_entry(&header->common);
238
239 /* Ignore invalid ID */
240 if (processor->id == 0xff)
241 return 0;
242
243 /*
244 * We need to register disabled CPU as well to permit
245 * counting disabled CPUs. This allows us to size
246 * cpus_possible_map more accurately, to permit
247 * to not preallocating memory for all NR_CPUS
248 * when we use CPU hotplug.
249 */
250 acpi_register_lapic(processor->id, /* APIC ID */
251 processor->processor_id, /* ACPI ID */
252 processor->lapic_flags & ACPI_MADT_ENABLED);
253
254 return 0;
255}
256
257static int __init
258acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
259{
260 struct acpi_madt_local_sapic *processor = NULL;
261
262 processor = (struct acpi_madt_local_sapic *)header;
263
264 if (BAD_MADT_ENTRY(processor, end))
265 return -EINVAL;
266
267 acpi_table_print_madt_entry(&header->common);
268
269 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
270 processor->processor_id, /* ACPI ID */
271 processor->lapic_flags & ACPI_MADT_ENABLED);
272
273 return 0;
274}
275
276static int __init
277acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
278 const unsigned long end)
279{
280 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
281
282 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
283
284 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
285 return -EINVAL;
286
287 acpi_table_print_madt_entry(&header->common);
288
289 acpi_lapic_addr = lapic_addr_ovr->address;
290
291 return 0;
292}
293
294static int __init
295acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
296 const unsigned long end)
297{
298 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
299
300 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
301
302 if (BAD_MADT_ENTRY(x2apic_nmi, end))
303 return -EINVAL;
304
305 acpi_table_print_madt_entry(&header->common);
306
307 if (x2apic_nmi->lint != 1)
308 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
309
310 return 0;
311}
312
313static int __init
314acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
315{
316 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
317
318 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
319
320 if (BAD_MADT_ENTRY(lapic_nmi, end))
321 return -EINVAL;
322
323 acpi_table_print_madt_entry(&header->common);
324
325 if (lapic_nmi->lint != 1)
326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
327
328 return 0;
329}
330
331#endif /*CONFIG_X86_LOCAL_APIC */
332
333#ifdef CONFIG_X86_IO_APIC
334#define MP_ISA_BUS 0
335
336static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
337 u8 trigger, u32 gsi);
338
339static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
340 u32 gsi)
341{
342 /*
343 * Check bus_irq boundary.
344 */
345 if (bus_irq >= NR_IRQS_LEGACY) {
346 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
347 return;
348 }
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 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
359 return;
360 /*
361 * Reset default identity mapping if gsi is also an legacy IRQ,
362 * otherwise there will be more than one entry with the same GSI
363 * and acpi_isa_irq_to_gsi() may give wrong result.
364 */
365 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
366 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
367 isa_irq_to_gsi[bus_irq] = gsi;
368}
369
370static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
371 int polarity)
372{
373#ifdef CONFIG_X86_MPPARSE
374 struct mpc_intsrc mp_irq;
375 struct pci_dev *pdev;
376 unsigned char number;
377 unsigned int devfn;
378 int ioapic;
379 u8 pin;
380
381 if (!acpi_ioapic)
382 return 0;
383 if (!dev || !dev_is_pci(dev))
384 return 0;
385
386 pdev = to_pci_dev(dev);
387 number = pdev->bus->number;
388 devfn = pdev->devfn;
389 pin = pdev->pin;
390 /* print the entry should happen on mptable identically */
391 mp_irq.type = MP_INTSRC;
392 mp_irq.irqtype = mp_INT;
393 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
394 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
395 mp_irq.srcbus = number;
396 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
397 ioapic = mp_find_ioapic(gsi);
398 mp_irq.dstapic = mpc_ioapic_id(ioapic);
399 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
400
401 mp_save_irq(&mp_irq);
402#endif
403 return 0;
404}
405
406static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
407 u8 trigger, u32 gsi)
408{
409 struct mpc_intsrc mp_irq;
410 int ioapic, pin;
411
412 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
413 ioapic = mp_find_ioapic(gsi);
414 if (ioapic < 0) {
415 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
416 return ioapic;
417 }
418
419 pin = mp_find_ioapic_pin(ioapic, gsi);
420
421 mp_irq.type = MP_INTSRC;
422 mp_irq.irqtype = mp_INT;
423 mp_irq.irqflag = (trigger << 2) | polarity;
424 mp_irq.srcbus = MP_ISA_BUS;
425 mp_irq.srcbusirq = bus_irq;
426 mp_irq.dstapic = mpc_ioapic_id(ioapic);
427 mp_irq.dstirq = pin;
428
429 mp_save_irq(&mp_irq);
430
431 return 0;
432}
433
434static int __init
435acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
436{
437 struct acpi_madt_io_apic *ioapic = NULL;
438 struct ioapic_domain_cfg cfg = {
439 .type = IOAPIC_DOMAIN_DYNAMIC,
440 .ops = &mp_ioapic_irqdomain_ops,
441 };
442
443 ioapic = (struct acpi_madt_io_apic *)header;
444
445 if (BAD_MADT_ENTRY(ioapic, end))
446 return -EINVAL;
447
448 acpi_table_print_madt_entry(&header->common);
449
450 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
451 if (ioapic->global_irq_base < nr_legacy_irqs())
452 cfg.type = IOAPIC_DOMAIN_LEGACY;
453
454 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
455 &cfg);
456
457 return 0;
458}
459
460/*
461 * Parse Interrupt Source Override for the ACPI SCI
462 */
463static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
464{
465 if (trigger == 0) /* compatible SCI trigger is level */
466 trigger = 3;
467
468 if (polarity == 0) /* compatible SCI polarity is low */
469 polarity = 3;
470
471 /* Command-line over-ride via acpi_sci= */
472 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
473 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
474
475 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
476 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
477
478 if (bus_irq < NR_IRQS_LEGACY)
479 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
480 else
481 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
482
483 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
484
485 /*
486 * stash over-ride to indicate we've been here
487 * and for later update of acpi_gbl_FADT
488 */
489 acpi_sci_override_gsi = gsi;
490 return;
491}
492
493static int __init
494acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
495 const unsigned long end)
496{
497 struct acpi_madt_interrupt_override *intsrc = NULL;
498
499 intsrc = (struct acpi_madt_interrupt_override *)header;
500
501 if (BAD_MADT_ENTRY(intsrc, end))
502 return -EINVAL;
503
504 acpi_table_print_madt_entry(&header->common);
505
506 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
507 acpi_sci_ioapic_setup(intsrc->source_irq,
508 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
509 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
510 intsrc->global_irq);
511 return 0;
512 }
513
514 if (intsrc->source_irq == 0) {
515 if (acpi_skip_timer_override) {
516 printk(PREFIX "BIOS IRQ0 override ignored.\n");
517 return 0;
518 }
519
520 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
521 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
522 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
523 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
524 }
525 }
526
527 mp_override_legacy_irq(intsrc->source_irq,
528 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
529 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
530 intsrc->global_irq);
531
532 return 0;
533}
534
535static int __init
536acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
537{
538 struct acpi_madt_nmi_source *nmi_src = NULL;
539
540 nmi_src = (struct acpi_madt_nmi_source *)header;
541
542 if (BAD_MADT_ENTRY(nmi_src, end))
543 return -EINVAL;
544
545 acpi_table_print_madt_entry(&header->common);
546
547 /* TBD: Support nimsrc entries? */
548
549 return 0;
550}
551
552#endif /* CONFIG_X86_IO_APIC */
553
554/*
555 * acpi_pic_sci_set_trigger()
556 *
557 * use ELCR to set PIC-mode trigger type for SCI
558 *
559 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
560 * it may require Edge Trigger -- use "acpi_sci=edge"
561 *
562 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
563 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
564 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
565 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
566 */
567
568void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
569{
570 unsigned int mask = 1 << irq;
571 unsigned int old, new;
572
573 /* Real old ELCR mask */
574 old = inb(0x4d0) | (inb(0x4d1) << 8);
575
576 /*
577 * If we use ACPI to set PCI IRQs, then we should clear ELCR
578 * since we will set it correctly as we enable the PCI irq
579 * routing.
580 */
581 new = acpi_noirq ? old : 0;
582
583 /*
584 * Update SCI information in the ELCR, it isn't in the PCI
585 * routing tables..
586 */
587 switch (trigger) {
588 case 1: /* Edge - clear */
589 new &= ~mask;
590 break;
591 case 3: /* Level - set */
592 new |= mask;
593 break;
594 }
595
596 if (old == new)
597 return;
598
599 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
600 outb(new, 0x4d0);
601 outb(new >> 8, 0x4d1);
602}
603
604int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
605{
606 int rc, irq, trigger, polarity;
607
608 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
609 *irqp = gsi;
610 return 0;
611 }
612
613 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
614 if (rc)
615 return rc;
616
617 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
618 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
619 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
620 if (irq < 0)
621 return irq;
622
623 *irqp = irq;
624 return 0;
625}
626EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
627
628int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
629{
630 if (isa_irq < nr_legacy_irqs() &&
631 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
632 *gsi = isa_irq_to_gsi[isa_irq];
633 return 0;
634 }
635
636 return -1;
637}
638
639static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
640 int trigger, int polarity)
641{
642#ifdef CONFIG_PCI
643 /*
644 * Make sure all (legacy) PCI IRQs are set as level-triggered.
645 */
646 if (trigger == ACPI_LEVEL_SENSITIVE)
647 elcr_set_level_irq(gsi);
648#endif
649
650 return gsi;
651}
652
653#ifdef CONFIG_X86_LOCAL_APIC
654static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
655 int trigger, int polarity)
656{
657 int irq = gsi;
658#ifdef CONFIG_X86_IO_APIC
659 int node;
660 struct irq_alloc_info info;
661
662 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
663 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
664 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
665 ioapic_set_alloc_attr(&info, node, trigger, polarity);
666
667 mutex_lock(&acpi_ioapic_lock);
668 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
669 /* Don't set up the ACPI SCI because it's already set up */
670 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
671 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
672 mutex_unlock(&acpi_ioapic_lock);
673#endif
674
675 return irq;
676}
677
678static void acpi_unregister_gsi_ioapic(u32 gsi)
679{
680#ifdef CONFIG_X86_IO_APIC
681 int irq;
682
683 mutex_lock(&acpi_ioapic_lock);
684 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
685 if (irq > 0)
686 mp_unmap_irq(irq);
687 mutex_unlock(&acpi_ioapic_lock);
688#endif
689}
690#endif
691
692int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
693 int trigger, int polarity) = acpi_register_gsi_pic;
694void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
695
696#ifdef CONFIG_ACPI_SLEEP
697int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
698#else
699int (*acpi_suspend_lowlevel)(void);
700#endif
701
702/*
703 * success: return IRQ number (>=0)
704 * failure: return < 0
705 */
706int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
707{
708 return __acpi_register_gsi(dev, gsi, trigger, polarity);
709}
710EXPORT_SYMBOL_GPL(acpi_register_gsi);
711
712void acpi_unregister_gsi(u32 gsi)
713{
714 if (__acpi_unregister_gsi)
715 __acpi_unregister_gsi(gsi);
716}
717EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
718
719#ifdef CONFIG_X86_LOCAL_APIC
720static void __init acpi_set_irq_model_ioapic(void)
721{
722 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
723 __acpi_register_gsi = acpi_register_gsi_ioapic;
724 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
725 acpi_ioapic = 1;
726}
727#endif
728
729/*
730 * ACPI based hotplug support for CPU
731 */
732#ifdef CONFIG_ACPI_HOTPLUG_CPU
733#include <acpi/processor.h>
734
735static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
736{
737#ifdef CONFIG_ACPI_NUMA
738 int nid;
739
740 nid = acpi_get_node(handle);
741 if (nid != NUMA_NO_NODE) {
742 set_apicid_to_node(physid, nid);
743 numa_set_node(cpu, nid);
744 }
745#endif
746 return 0;
747}
748
749int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
750 int *pcpu)
751{
752 int cpu;
753
754 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
755 if (cpu < 0) {
756 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
757 return cpu;
758 }
759
760 acpi_processor_set_pdc(handle);
761 acpi_map_cpu2node(handle, cpu, physid);
762
763 *pcpu = cpu;
764 return 0;
765}
766EXPORT_SYMBOL(acpi_map_cpu);
767
768int acpi_unmap_cpu(int cpu)
769{
770#ifdef CONFIG_ACPI_NUMA
771 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
772#endif
773
774 per_cpu(x86_cpu_to_apicid, cpu) = -1;
775 set_cpu_present(cpu, false);
776 num_processors--;
777
778 return (0);
779}
780EXPORT_SYMBOL(acpi_unmap_cpu);
781#endif /* CONFIG_ACPI_HOTPLUG_CPU */
782
783int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
784{
785 int ret = -ENOSYS;
786#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
787 int ioapic_id;
788 u64 addr;
789 struct ioapic_domain_cfg cfg = {
790 .type = IOAPIC_DOMAIN_DYNAMIC,
791 .ops = &mp_ioapic_irqdomain_ops,
792 };
793
794 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
795 if (ioapic_id < 0) {
796 unsigned long long uid;
797 acpi_status status;
798
799 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
800 NULL, &uid);
801 if (ACPI_FAILURE(status)) {
802 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
803 return -EINVAL;
804 }
805 ioapic_id = (int)uid;
806 }
807
808 mutex_lock(&acpi_ioapic_lock);
809 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
810 mutex_unlock(&acpi_ioapic_lock);
811#endif
812
813 return ret;
814}
815EXPORT_SYMBOL(acpi_register_ioapic);
816
817int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
818{
819 int ret = -ENOSYS;
820
821#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
822 mutex_lock(&acpi_ioapic_lock);
823 ret = mp_unregister_ioapic(gsi_base);
824 mutex_unlock(&acpi_ioapic_lock);
825#endif
826
827 return ret;
828}
829EXPORT_SYMBOL(acpi_unregister_ioapic);
830
831/**
832 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
833 * has been registered
834 * @handle: ACPI handle of the IOAPIC device
835 * @gsi_base: GSI base associated with the IOAPIC
836 *
837 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
838 * with acpi_register_ioapic()/acpi_unregister_ioapic().
839 */
840int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
841{
842 int ret = 0;
843
844#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
845 mutex_lock(&acpi_ioapic_lock);
846 ret = mp_ioapic_registered(gsi_base);
847 mutex_unlock(&acpi_ioapic_lock);
848#endif
849
850 return ret;
851}
852
853static int __init acpi_parse_sbf(struct acpi_table_header *table)
854{
855 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
856
857 sbf_port = sb->cmos_index; /* Save CMOS port */
858
859 return 0;
860}
861
862#ifdef CONFIG_HPET_TIMER
863#include <asm/hpet.h>
864
865static struct resource *hpet_res __initdata;
866
867static int __init acpi_parse_hpet(struct acpi_table_header *table)
868{
869 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
870
871 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
872 printk(KERN_WARNING PREFIX "HPET timers must be located in "
873 "memory.\n");
874 return -1;
875 }
876
877 hpet_address = hpet_tbl->address.address;
878 hpet_blockid = hpet_tbl->sequence;
879
880 /*
881 * Some broken BIOSes advertise HPET at 0x0. We really do not
882 * want to allocate a resource there.
883 */
884 if (!hpet_address) {
885 printk(KERN_WARNING PREFIX
886 "HPET id: %#x base: %#lx is invalid\n",
887 hpet_tbl->id, hpet_address);
888 return 0;
889 }
890#ifdef CONFIG_X86_64
891 /*
892 * Some even more broken BIOSes advertise HPET at
893 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
894 * some noise:
895 */
896 if (hpet_address == 0xfed0000000000000UL) {
897 if (!hpet_force_user) {
898 printk(KERN_WARNING PREFIX "HPET id: %#x "
899 "base: 0xfed0000000000000 is bogus\n "
900 "try hpet=force on the kernel command line to "
901 "fix it up to 0xfed00000.\n", hpet_tbl->id);
902 hpet_address = 0;
903 return 0;
904 }
905 printk(KERN_WARNING PREFIX
906 "HPET id: %#x base: 0xfed0000000000000 fixed up "
907 "to 0xfed00000.\n", hpet_tbl->id);
908 hpet_address >>= 32;
909 }
910#endif
911 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
912 hpet_tbl->id, hpet_address);
913
914 /*
915 * Allocate and initialize the HPET firmware resource for adding into
916 * the resource tree during the lateinit timeframe.
917 */
918#define HPET_RESOURCE_NAME_SIZE 9
919 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
920 SMP_CACHE_BYTES);
921 if (!hpet_res)
922 panic("%s: Failed to allocate %zu bytes\n", __func__,
923 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
924
925 hpet_res->name = (void *)&hpet_res[1];
926 hpet_res->flags = IORESOURCE_MEM;
927 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
928 hpet_tbl->sequence);
929
930 hpet_res->start = hpet_address;
931 hpet_res->end = hpet_address + (1 * 1024) - 1;
932
933 return 0;
934}
935
936/*
937 * hpet_insert_resource inserts the HPET resources used into the resource
938 * tree.
939 */
940static __init int hpet_insert_resource(void)
941{
942 if (!hpet_res)
943 return 1;
944
945 return insert_resource(&iomem_resource, hpet_res);
946}
947
948late_initcall(hpet_insert_resource);
949
950#else
951#define acpi_parse_hpet NULL
952#endif
953
954static int __init acpi_parse_fadt(struct acpi_table_header *table)
955{
956 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
957 pr_debug("ACPI: no legacy devices present\n");
958 x86_platform.legacy.devices.pnpbios = 0;
959 }
960
961 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
962 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
963 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
964 pr_debug("ACPI: i8042 controller is absent\n");
965 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
966 }
967
968 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
969 pr_debug("ACPI: not registering RTC platform device\n");
970 x86_platform.legacy.rtc = 0;
971 }
972
973 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
974 pr_debug("ACPI: probing for VGA not safe\n");
975 x86_platform.legacy.no_vga = 1;
976 }
977
978#ifdef CONFIG_X86_PM_TIMER
979 /* detect the location of the ACPI PM Timer */
980 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
981 /* FADT rev. 2 */
982 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
983 ACPI_ADR_SPACE_SYSTEM_IO)
984 return 0;
985
986 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
987 /*
988 * "X" fields are optional extensions to the original V1.0
989 * fields, so we must selectively expand V1.0 fields if the
990 * corresponding X field is zero.
991 */
992 if (!pmtmr_ioport)
993 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
994 } else {
995 /* FADT rev. 1 */
996 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
997 }
998 if (pmtmr_ioport)
999 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1000 pmtmr_ioport);
1001#endif
1002 return 0;
1003}
1004
1005#ifdef CONFIG_X86_LOCAL_APIC
1006/*
1007 * Parse LAPIC entries in MADT
1008 * returns 0 on success, < 0 on error
1009 */
1010
1011static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1012{
1013 int count;
1014
1015 if (!boot_cpu_has(X86_FEATURE_APIC))
1016 return -ENODEV;
1017
1018 /*
1019 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1020 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1021 */
1022
1023 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1024 acpi_parse_lapic_addr_ovr, 0);
1025 if (count < 0) {
1026 printk(KERN_ERR PREFIX
1027 "Error parsing LAPIC address override entry\n");
1028 return count;
1029 }
1030
1031 register_lapic_address(acpi_lapic_addr);
1032
1033 return count;
1034}
1035
1036static int __init acpi_parse_madt_lapic_entries(void)
1037{
1038 int count;
1039 int x2count = 0;
1040 int ret;
1041 struct acpi_subtable_proc madt_proc[2];
1042
1043 if (!boot_cpu_has(X86_FEATURE_APIC))
1044 return -ENODEV;
1045
1046 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1047 acpi_parse_sapic, MAX_LOCAL_APIC);
1048
1049 if (!count) {
1050 memset(madt_proc, 0, sizeof(madt_proc));
1051 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1052 madt_proc[0].handler = acpi_parse_lapic;
1053 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1054 madt_proc[1].handler = acpi_parse_x2apic;
1055 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1056 sizeof(struct acpi_table_madt),
1057 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1058 if (ret < 0) {
1059 printk(KERN_ERR PREFIX
1060 "Error parsing LAPIC/X2APIC entries\n");
1061 return ret;
1062 }
1063
1064 count = madt_proc[0].count;
1065 x2count = madt_proc[1].count;
1066 }
1067 if (!count && !x2count) {
1068 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1069 /* TBD: Cleanup to allow fallback to MPS */
1070 return -ENODEV;
1071 } else if (count < 0 || x2count < 0) {
1072 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1073 /* TBD: Cleanup to allow fallback to MPS */
1074 return count;
1075 }
1076
1077 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1078 acpi_parse_x2apic_nmi, 0);
1079 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1080 acpi_parse_lapic_nmi, 0);
1081 if (count < 0 || x2count < 0) {
1082 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1083 /* TBD: Cleanup to allow fallback to MPS */
1084 return count;
1085 }
1086 return 0;
1087}
1088#endif /* CONFIG_X86_LOCAL_APIC */
1089
1090#ifdef CONFIG_X86_IO_APIC
1091static void __init mp_config_acpi_legacy_irqs(void)
1092{
1093 int i;
1094 struct mpc_intsrc mp_irq;
1095
1096#ifdef CONFIG_EISA
1097 /*
1098 * Fabricate the legacy ISA bus (bus #31).
1099 */
1100 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1101#endif
1102 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1103 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1104
1105 /*
1106 * Use the default configuration for the IRQs 0-15. Unless
1107 * overridden by (MADT) interrupt source override entries.
1108 */
1109 for (i = 0; i < nr_legacy_irqs(); i++) {
1110 int ioapic, pin;
1111 unsigned int dstapic;
1112 int idx;
1113 u32 gsi;
1114
1115 /* Locate the gsi that irq i maps to. */
1116 if (acpi_isa_irq_to_gsi(i, &gsi))
1117 continue;
1118
1119 /*
1120 * Locate the IOAPIC that manages the ISA IRQ.
1121 */
1122 ioapic = mp_find_ioapic(gsi);
1123 if (ioapic < 0)
1124 continue;
1125 pin = mp_find_ioapic_pin(ioapic, gsi);
1126 dstapic = mpc_ioapic_id(ioapic);
1127
1128 for (idx = 0; idx < mp_irq_entries; idx++) {
1129 struct mpc_intsrc *irq = mp_irqs + idx;
1130
1131 /* Do we already have a mapping for this ISA IRQ? */
1132 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1133 break;
1134
1135 /* Do we already have a mapping for this IOAPIC pin */
1136 if (irq->dstapic == dstapic && irq->dstirq == pin)
1137 break;
1138 }
1139
1140 if (idx != mp_irq_entries) {
1141 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1142 continue; /* IRQ already used */
1143 }
1144
1145 mp_irq.type = MP_INTSRC;
1146 mp_irq.irqflag = 0; /* Conforming */
1147 mp_irq.srcbus = MP_ISA_BUS;
1148 mp_irq.dstapic = dstapic;
1149 mp_irq.irqtype = mp_INT;
1150 mp_irq.srcbusirq = i; /* Identity mapped */
1151 mp_irq.dstirq = pin;
1152
1153 mp_save_irq(&mp_irq);
1154 }
1155}
1156
1157/*
1158 * Parse IOAPIC related entries in MADT
1159 * returns 0 on success, < 0 on error
1160 */
1161static int __init acpi_parse_madt_ioapic_entries(void)
1162{
1163 int count;
1164
1165 /*
1166 * ACPI interpreter is required to complete interrupt setup,
1167 * so if it is off, don't enumerate the io-apics with ACPI.
1168 * If MPS is present, it will handle them,
1169 * otherwise the system will stay in PIC mode
1170 */
1171 if (acpi_disabled || acpi_noirq)
1172 return -ENODEV;
1173
1174 if (!boot_cpu_has(X86_FEATURE_APIC))
1175 return -ENODEV;
1176
1177 /*
1178 * if "noapic" boot option, don't look for IO-APICs
1179 */
1180 if (skip_ioapic_setup) {
1181 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1182 "due to 'noapic' option.\n");
1183 return -ENODEV;
1184 }
1185
1186 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1187 MAX_IO_APICS);
1188 if (!count) {
1189 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1190 return -ENODEV;
1191 } else if (count < 0) {
1192 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1193 return count;
1194 }
1195
1196 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1197 acpi_parse_int_src_ovr, nr_irqs);
1198 if (count < 0) {
1199 printk(KERN_ERR PREFIX
1200 "Error parsing interrupt source overrides entry\n");
1201 /* TBD: Cleanup to allow fallback to MPS */
1202 return count;
1203 }
1204
1205 /*
1206 * If BIOS did not supply an INT_SRC_OVR for the SCI
1207 * pretend we got one so we can set the SCI flags.
1208 * But ignore setting up SCI on hardware reduced platforms.
1209 */
1210 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1211 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1212 acpi_gbl_FADT.sci_interrupt);
1213
1214 /* Fill in identity legacy mappings where no override */
1215 mp_config_acpi_legacy_irqs();
1216
1217 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1218 acpi_parse_nmi_src, nr_irqs);
1219 if (count < 0) {
1220 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1221 /* TBD: Cleanup to allow fallback to MPS */
1222 return count;
1223 }
1224
1225 return 0;
1226}
1227#else
1228static inline int acpi_parse_madt_ioapic_entries(void)
1229{
1230 return -1;
1231}
1232#endif /* !CONFIG_X86_IO_APIC */
1233
1234static void __init early_acpi_process_madt(void)
1235{
1236#ifdef CONFIG_X86_LOCAL_APIC
1237 int error;
1238
1239 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1240
1241 /*
1242 * Parse MADT LAPIC entries
1243 */
1244 error = early_acpi_parse_madt_lapic_addr_ovr();
1245 if (!error) {
1246 acpi_lapic = 1;
1247 smp_found_config = 1;
1248 }
1249 if (error == -EINVAL) {
1250 /*
1251 * Dell Precision Workstation 410, 610 come here.
1252 */
1253 printk(KERN_ERR PREFIX
1254 "Invalid BIOS MADT, disabling ACPI\n");
1255 disable_acpi();
1256 }
1257 }
1258#endif
1259}
1260
1261static void __init acpi_process_madt(void)
1262{
1263#ifdef CONFIG_X86_LOCAL_APIC
1264 int error;
1265
1266 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1267
1268 /*
1269 * Parse MADT LAPIC entries
1270 */
1271 error = acpi_parse_madt_lapic_entries();
1272 if (!error) {
1273 acpi_lapic = 1;
1274
1275 /*
1276 * Parse MADT IO-APIC entries
1277 */
1278 mutex_lock(&acpi_ioapic_lock);
1279 error = acpi_parse_madt_ioapic_entries();
1280 mutex_unlock(&acpi_ioapic_lock);
1281 if (!error) {
1282 acpi_set_irq_model_ioapic();
1283
1284 smp_found_config = 1;
1285 }
1286 }
1287 if (error == -EINVAL) {
1288 /*
1289 * Dell Precision Workstation 410, 610 come here.
1290 */
1291 printk(KERN_ERR PREFIX
1292 "Invalid BIOS MADT, disabling ACPI\n");
1293 disable_acpi();
1294 }
1295 } else {
1296 /*
1297 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1298 * In the event an MPS table was found, forget it.
1299 * Boot with "acpi=off" to use MPS on such a system.
1300 */
1301 if (smp_found_config) {
1302 printk(KERN_WARNING PREFIX
1303 "No APIC-table, disabling MPS\n");
1304 smp_found_config = 0;
1305 }
1306 }
1307
1308 /*
1309 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1310 * processors, where MPS only supports physical.
1311 */
1312 if (acpi_lapic && acpi_ioapic)
1313 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1314 "information\n");
1315 else if (acpi_lapic)
1316 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1317 "configuration information\n");
1318#endif
1319 return;
1320}
1321
1322static int __init disable_acpi_irq(const struct dmi_system_id *d)
1323{
1324 if (!acpi_force) {
1325 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1326 d->ident);
1327 acpi_noirq_set();
1328 }
1329 return 0;
1330}
1331
1332static int __init disable_acpi_pci(const struct dmi_system_id *d)
1333{
1334 if (!acpi_force) {
1335 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1336 d->ident);
1337 acpi_disable_pci();
1338 }
1339 return 0;
1340}
1341
1342static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1343{
1344 if (!acpi_force) {
1345 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1346 disable_acpi();
1347 } else {
1348 printk(KERN_NOTICE
1349 "Warning: DMI blacklist says broken, but acpi forced\n");
1350 }
1351 return 0;
1352}
1353
1354/*
1355 * Force ignoring BIOS IRQ0 override
1356 */
1357static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1358{
1359 if (!acpi_skip_timer_override) {
1360 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1361 d->ident);
1362 acpi_skip_timer_override = 1;
1363 }
1364 return 0;
1365}
1366
1367/*
1368 * ACPI offers an alternative platform interface model that removes
1369 * ACPI hardware requirements for platforms that do not implement
1370 * the PC Architecture.
1371 *
1372 * We initialize the Hardware-reduced ACPI model here:
1373 */
1374void __init acpi_generic_reduced_hw_init(void)
1375{
1376 /*
1377 * Override x86_init functions and bypass legacy PIC in
1378 * hardware reduced ACPI mode.
1379 */
1380 x86_init.timers.timer_init = x86_init_noop;
1381 x86_init.irqs.pre_vector_init = x86_init_noop;
1382 legacy_pic = &null_legacy_pic;
1383}
1384
1385static void __init acpi_reduced_hw_init(void)
1386{
1387 if (acpi_gbl_reduced_hardware)
1388 x86_init.acpi.reduced_hw_early_init();
1389}
1390
1391/*
1392 * If your system is blacklisted here, but you find that acpi=force
1393 * works for you, please contact linux-acpi@vger.kernel.org
1394 */
1395static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1396 /*
1397 * Boxes that need ACPI disabled
1398 */
1399 {
1400 .callback = dmi_disable_acpi,
1401 .ident = "IBM Thinkpad",
1402 .matches = {
1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1404 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1405 },
1406 },
1407
1408 /*
1409 * Boxes that need ACPI PCI IRQ routing disabled
1410 */
1411 {
1412 .callback = disable_acpi_irq,
1413 .ident = "ASUS A7V",
1414 .matches = {
1415 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1416 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1417 /* newer BIOS, Revision 1011, does work */
1418 DMI_MATCH(DMI_BIOS_VERSION,
1419 "ASUS A7V ACPI BIOS Revision 1007"),
1420 },
1421 },
1422 {
1423 /*
1424 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1425 * for LPC bridge, which is needed for the PCI
1426 * interrupt links to work. DSDT fix is in bug 5966.
1427 * 2645, 2646 model numbers are shared with 600/600E/600X
1428 */
1429 .callback = disable_acpi_irq,
1430 .ident = "IBM Thinkpad 600 Series 2645",
1431 .matches = {
1432 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1433 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1434 },
1435 },
1436 {
1437 .callback = disable_acpi_irq,
1438 .ident = "IBM Thinkpad 600 Series 2646",
1439 .matches = {
1440 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1441 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1442 },
1443 },
1444 /*
1445 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1446 */
1447 { /* _BBN 0 bug */
1448 .callback = disable_acpi_pci,
1449 .ident = "ASUS PR-DLS",
1450 .matches = {
1451 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1452 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1453 DMI_MATCH(DMI_BIOS_VERSION,
1454 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1455 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1456 },
1457 },
1458 {
1459 .callback = disable_acpi_pci,
1460 .ident = "Acer TravelMate 36x Laptop",
1461 .matches = {
1462 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1463 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1464 },
1465 },
1466 {}
1467};
1468
1469/* second table for DMI checks that should run after early-quirks */
1470static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1471 /*
1472 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1473 * which includes some code which overrides all temperature
1474 * trip points to 16C if the INTIN2 input of the I/O APIC
1475 * is enabled. This input is incorrectly designated the
1476 * ISA IRQ 0 via an interrupt source override even though
1477 * it is wired to the output of the master 8259A and INTIN0
1478 * is not connected at all. Force ignoring BIOS IRQ0
1479 * override in that cases.
1480 */
1481 {
1482 .callback = dmi_ignore_irq0_timer_override,
1483 .ident = "HP nx6115 laptop",
1484 .matches = {
1485 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1486 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1487 },
1488 },
1489 {
1490 .callback = dmi_ignore_irq0_timer_override,
1491 .ident = "HP NX6125 laptop",
1492 .matches = {
1493 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1494 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1495 },
1496 },
1497 {
1498 .callback = dmi_ignore_irq0_timer_override,
1499 .ident = "HP NX6325 laptop",
1500 .matches = {
1501 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1502 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1503 },
1504 },
1505 {
1506 .callback = dmi_ignore_irq0_timer_override,
1507 .ident = "HP 6715b laptop",
1508 .matches = {
1509 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1510 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1511 },
1512 },
1513 {
1514 .callback = dmi_ignore_irq0_timer_override,
1515 .ident = "FUJITSU SIEMENS",
1516 .matches = {
1517 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1518 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1519 },
1520 },
1521 {}
1522};
1523
1524/*
1525 * acpi_boot_table_init() and acpi_boot_init()
1526 * called from setup_arch(), always.
1527 * 1. checksums all tables
1528 * 2. enumerates lapics
1529 * 3. enumerates io-apics
1530 *
1531 * acpi_table_init() is separate to allow reading SRAT without
1532 * other side effects.
1533 *
1534 * side effects of acpi_boot_init:
1535 * acpi_lapic = 1 if LAPIC found
1536 * acpi_ioapic = 1 if IOAPIC found
1537 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1538 * if acpi_blacklisted() acpi_disabled = 1;
1539 * acpi_irq_model=...
1540 * ...
1541 */
1542
1543void __init acpi_boot_table_init(void)
1544{
1545 dmi_check_system(acpi_dmi_table);
1546
1547 /*
1548 * If acpi_disabled, bail out
1549 */
1550 if (acpi_disabled)
1551 return;
1552
1553 /*
1554 * Initialize the ACPI boot-time table parser.
1555 */
1556 if (acpi_table_init()) {
1557 disable_acpi();
1558 return;
1559 }
1560
1561 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1562
1563 /*
1564 * blacklist may disable ACPI entirely
1565 */
1566 if (acpi_blacklisted()) {
1567 if (acpi_force) {
1568 printk(KERN_WARNING PREFIX "acpi=force override\n");
1569 } else {
1570 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1571 disable_acpi();
1572 return;
1573 }
1574 }
1575}
1576
1577int __init early_acpi_boot_init(void)
1578{
1579 /*
1580 * If acpi_disabled, bail out
1581 */
1582 if (acpi_disabled)
1583 return 1;
1584
1585 /*
1586 * Process the Multiple APIC Description Table (MADT), if present
1587 */
1588 early_acpi_process_madt();
1589
1590 /*
1591 * Hardware-reduced ACPI mode initialization:
1592 */
1593 acpi_reduced_hw_init();
1594
1595 return 0;
1596}
1597
1598int __init acpi_boot_init(void)
1599{
1600 /* those are executed after early-quirks are executed */
1601 dmi_check_system(acpi_dmi_table_late);
1602
1603 /*
1604 * If acpi_disabled, bail out
1605 */
1606 if (acpi_disabled)
1607 return 1;
1608
1609 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1610
1611 /*
1612 * set sci_int and PM timer address
1613 */
1614 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1615
1616 /*
1617 * Process the Multiple APIC Description Table (MADT), if present
1618 */
1619 acpi_process_madt();
1620
1621 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1622 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1623 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1624
1625 if (!acpi_noirq)
1626 x86_init.pci.init = pci_acpi_init;
1627
1628 /* Do not enable ACPI SPCR console by default */
1629 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1630 return 0;
1631}
1632
1633static int __init parse_acpi(char *arg)
1634{
1635 if (!arg)
1636 return -EINVAL;
1637
1638 /* "acpi=off" disables both ACPI table parsing and interpreter */
1639 if (strcmp(arg, "off") == 0) {
1640 disable_acpi();
1641 }
1642 /* acpi=force to over-ride black-list */
1643 else if (strcmp(arg, "force") == 0) {
1644 acpi_force = 1;
1645 acpi_disabled = 0;
1646 }
1647 /* acpi=strict disables out-of-spec workarounds */
1648 else if (strcmp(arg, "strict") == 0) {
1649 acpi_strict = 1;
1650 }
1651 /* acpi=rsdt use RSDT instead of XSDT */
1652 else if (strcmp(arg, "rsdt") == 0) {
1653 acpi_gbl_do_not_use_xsdt = TRUE;
1654 }
1655 /* "acpi=noirq" disables ACPI interrupt routing */
1656 else if (strcmp(arg, "noirq") == 0) {
1657 acpi_noirq_set();
1658 }
1659 /* "acpi=copy_dsdt" copys DSDT */
1660 else if (strcmp(arg, "copy_dsdt") == 0) {
1661 acpi_gbl_copy_dsdt_locally = 1;
1662 }
1663 /* "acpi=nocmcff" disables FF mode for corrected errors */
1664 else if (strcmp(arg, "nocmcff") == 0) {
1665 acpi_disable_cmcff = 1;
1666 } else {
1667 /* Core will printk when we return error. */
1668 return -EINVAL;
1669 }
1670 return 0;
1671}
1672early_param("acpi", parse_acpi);
1673
1674/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1675static int __init parse_pci(char *arg)
1676{
1677 if (arg && strcmp(arg, "noacpi") == 0)
1678 acpi_disable_pci();
1679 return 0;
1680}
1681early_param("pci", parse_pci);
1682
1683int __init acpi_mps_check(void)
1684{
1685#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1686/* mptable code is not built-in*/
1687 if (acpi_disabled || acpi_noirq) {
1688 printk(KERN_WARNING "MPS support code is not built-in.\n"
1689 "Using acpi=off or acpi=noirq or pci=noacpi "
1690 "may have problem\n");
1691 return 1;
1692 }
1693#endif
1694 return 0;
1695}
1696
1697#ifdef CONFIG_X86_IO_APIC
1698static int __init parse_acpi_skip_timer_override(char *arg)
1699{
1700 acpi_skip_timer_override = 1;
1701 return 0;
1702}
1703early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1704
1705static int __init parse_acpi_use_timer_override(char *arg)
1706{
1707 acpi_use_timer_override = 1;
1708 return 0;
1709}
1710early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1711#endif /* CONFIG_X86_IO_APIC */
1712
1713static int __init setup_acpi_sci(char *s)
1714{
1715 if (!s)
1716 return -EINVAL;
1717 if (!strcmp(s, "edge"))
1718 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1719 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1720 else if (!strcmp(s, "level"))
1721 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1722 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1723 else if (!strcmp(s, "high"))
1724 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1725 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1726 else if (!strcmp(s, "low"))
1727 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1728 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1729 else
1730 return -EINVAL;
1731 return 0;
1732}
1733early_param("acpi_sci", setup_acpi_sci);
1734
1735int __acpi_acquire_global_lock(unsigned int *lock)
1736{
1737 unsigned int old, new, val;
1738 do {
1739 old = *lock;
1740 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1741 val = cmpxchg(lock, old, new);
1742 } while (unlikely (val != old));
1743 return (new < 3) ? -1 : 0;
1744}
1745
1746int __acpi_release_global_lock(unsigned int *lock)
1747{
1748 unsigned int old, new, val;
1749 do {
1750 old = *lock;
1751 new = old & ~0x3;
1752 val = cmpxchg(lock, old, new);
1753 } while (unlikely (val != old));
1754 return old & 0x1;
1755}
1756
1757void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1758{
1759 e820__range_add(addr, size, E820_TYPE_ACPI);
1760 e820__update_table_print();
1761}
1762
1763void x86_default_set_root_pointer(u64 addr)
1764{
1765 boot_params.acpi_rsdp_addr = addr;
1766}
1767
1768u64 x86_default_get_root_pointer(void)
1769{
1770 return boot_params.acpi_rsdp_addr;
1771}