1/*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26#include <linux/init.h>
27#include <linux/acpi.h>
28#include <linux/acpi_pmtmr.h>
29#include <linux/efi.h>
30#include <linux/cpumask.h>
31#include <linux/export.h>
32#include <linux/dmi.h>
33#include <linux/irq.h>
34#include <linux/slab.h>
35#include <linux/memblock.h>
36#include <linux/ioport.h>
37#include <linux/pci.h>
38#include <linux/efi-bgrt.h>
39#include <linux/serial_core.h>
40
41#include <asm/e820/api.h>
42#include <asm/irqdomain.h>
43#include <asm/pci_x86.h>
44#include <asm/pgtable.h>
45#include <asm/io_apic.h>
46#include <asm/apic.h>
47#include <asm/io.h>
48#include <asm/mpspec.h>
49#include <asm/smp.h>
50#include <asm/i8259.h>
51#include <asm/setup.h>
52
53#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
54static int __initdata acpi_force = 0;
55int acpi_disabled;
56EXPORT_SYMBOL(acpi_disabled);
57
58#ifdef CONFIG_X86_64
59# include <asm/proto.h>
60#endif /* X86 */
61
62#define PREFIX "ACPI: "
63
64int acpi_noirq; /* skip ACPI IRQ initialization */
65int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
66EXPORT_SYMBOL(acpi_pci_disabled);
67
68int acpi_lapic;
69int acpi_ioapic;
70int acpi_strict;
71int acpi_disable_cmcff;
72
73/* ACPI SCI override configuration */
74u8 acpi_sci_flags __initdata;
75u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
76int acpi_skip_timer_override __initdata;
77int acpi_use_timer_override __initdata;
78int acpi_fix_pin2_polarity __initdata;
79
80#ifdef CONFIG_X86_LOCAL_APIC
81static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
82#endif
83
84#ifdef CONFIG_X86_IO_APIC
85/*
86 * Locks related to IOAPIC hotplug
87 * Hotplug side:
88 * ->device_hotplug_lock
89 * ->acpi_ioapic_lock
90 * ->ioapic_lock
91 * Interrupt mapping side:
92 * ->acpi_ioapic_lock
93 * ->ioapic_mutex
94 * ->ioapic_lock
95 */
96static DEFINE_MUTEX(acpi_ioapic_lock);
97#endif
98
99/* --------------------------------------------------------------------------
100 Boot-time Configuration
101 -------------------------------------------------------------------------- */
102
103/*
104 * The default interrupt routing model is PIC (8259). This gets
105 * overridden if IOAPICs are enumerated (below).
106 */
107enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
108
109
110/*
111 * ISA irqs by default are the first 16 gsis but can be
112 * any gsi as specified by an interrupt source override.
113 */
114static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
115 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
116};
117
118/*
119 * This is just a simple wrapper around early_memremap(),
120 * with sanity checks for phys == 0 and size == 0.
121 */
122void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
123{
124
125 if (!phys || !size)
126 return NULL;
127
128 return early_memremap(phys, size);
129}
130
131void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
132{
133 if (!map || !size)
134 return;
135
136 early_memunmap(map, size);
137}
138
139#ifdef CONFIG_X86_LOCAL_APIC
140static int __init acpi_parse_madt(struct acpi_table_header *table)
141{
142 struct acpi_table_madt *madt = NULL;
143
144 if (!boot_cpu_has(X86_FEATURE_APIC))
145 return -EINVAL;
146
147 madt = (struct acpi_table_madt *)table;
148 if (!madt) {
149 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
150 return -ENODEV;
151 }
152
153 if (madt->address) {
154 acpi_lapic_addr = (u64) madt->address;
155
156 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
157 madt->address);
158 }
159
160 default_acpi_madt_oem_check(madt->header.oem_id,
161 madt->header.oem_table_id);
162
163 return 0;
164}
165
166/**
167 * acpi_register_lapic - register a local apic and generates a logic cpu number
168 * @id: local apic id to register
169 * @acpiid: ACPI id to register
170 * @enabled: this cpu is enabled or not
171 *
172 * Returns the logic cpu number which maps to the local apic
173 */
174static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
175{
176 unsigned int ver = 0;
177 int cpu;
178
179 if (id >= MAX_LOCAL_APIC) {
180 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
181 return -EINVAL;
182 }
183
184 if (!enabled) {
185 ++disabled_cpus;
186 return -EINVAL;
187 }
188
189 if (boot_cpu_physical_apicid != -1U)
190 ver = boot_cpu_apic_version;
191
192 cpu = generic_processor_info(id, ver);
193 if (cpu >= 0)
194 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
195
196 return cpu;
197}
198
199static int __init
200acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
201{
202 struct acpi_madt_local_x2apic *processor = NULL;
203#ifdef CONFIG_X86_X2APIC
204 u32 apic_id;
205 u8 enabled;
206#endif
207
208 processor = (struct acpi_madt_local_x2apic *)header;
209
210 if (BAD_MADT_ENTRY(processor, end))
211 return -EINVAL;
212
213 acpi_table_print_madt_entry(header);
214
215#ifdef CONFIG_X86_X2APIC
216 apic_id = processor->local_apic_id;
217 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
218
219 /* Ignore invalid ID */
220 if (apic_id == 0xffffffff)
221 return 0;
222
223 /*
224 * We need to register disabled CPU as well to permit
225 * counting disabled CPUs. This allows us to size
226 * cpus_possible_map more accurately, to permit
227 * to not preallocating memory for all NR_CPUS
228 * when we use CPU hotplug.
229 */
230 if (!apic->apic_id_valid(apic_id)) {
231 if (enabled)
232 pr_warn(PREFIX "x2apic entry ignored\n");
233 return 0;
234 }
235
236 acpi_register_lapic(apic_id, processor->uid, enabled);
237#else
238 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
239#endif
240
241 return 0;
242}
243
244static int __init
245acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
246{
247 struct acpi_madt_local_apic *processor = NULL;
248
249 processor = (struct acpi_madt_local_apic *)header;
250
251 if (BAD_MADT_ENTRY(processor, end))
252 return -EINVAL;
253
254 acpi_table_print_madt_entry(header);
255
256 /* Ignore invalid ID */
257 if (processor->id == 0xff)
258 return 0;
259
260 /*
261 * We need to register disabled CPU as well to permit
262 * counting disabled CPUs. This allows us to size
263 * cpus_possible_map more accurately, to permit
264 * to not preallocating memory for all NR_CPUS
265 * when we use CPU hotplug.
266 */
267 acpi_register_lapic(processor->id, /* APIC ID */
268 processor->processor_id, /* ACPI ID */
269 processor->lapic_flags & ACPI_MADT_ENABLED);
270
271 return 0;
272}
273
274static int __init
275acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
276{
277 struct acpi_madt_local_sapic *processor = NULL;
278
279 processor = (struct acpi_madt_local_sapic *)header;
280
281 if (BAD_MADT_ENTRY(processor, end))
282 return -EINVAL;
283
284 acpi_table_print_madt_entry(header);
285
286 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
287 processor->processor_id, /* ACPI ID */
288 processor->lapic_flags & ACPI_MADT_ENABLED);
289
290 return 0;
291}
292
293static int __init
294acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
295 const unsigned long end)
296{
297 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
298
299 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
300
301 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
302 return -EINVAL;
303
304 acpi_table_print_madt_entry(header);
305
306 acpi_lapic_addr = lapic_addr_ovr->address;
307
308 return 0;
309}
310
311static int __init
312acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
313 const unsigned long end)
314{
315 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
316
317 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
318
319 if (BAD_MADT_ENTRY(x2apic_nmi, end))
320 return -EINVAL;
321
322 acpi_table_print_madt_entry(header);
323
324 if (x2apic_nmi->lint != 1)
325 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
326
327 return 0;
328}
329
330static int __init
331acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
332{
333 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
334
335 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
336
337 if (BAD_MADT_ENTRY(lapic_nmi, end))
338 return -EINVAL;
339
340 acpi_table_print_madt_entry(header);
341
342 if (lapic_nmi->lint != 1)
343 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
344
345 return 0;
346}
347
348#endif /*CONFIG_X86_LOCAL_APIC */
349
350#ifdef CONFIG_X86_IO_APIC
351#define MP_ISA_BUS 0
352
353static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
354 u8 trigger, u32 gsi);
355
356static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
357 u32 gsi)
358{
359 /*
360 * Check bus_irq boundary.
361 */
362 if (bus_irq >= NR_IRQS_LEGACY) {
363 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
364 return;
365 }
366
367 /*
368 * TBD: This check is for faulty timer entries, where the override
369 * erroneously sets the trigger to level, resulting in a HUGE
370 * increase of timer interrupts!
371 */
372 if ((bus_irq == 0) && (trigger == 3))
373 trigger = 1;
374
375 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
376 return;
377 /*
378 * Reset default identity mapping if gsi is also an legacy IRQ,
379 * otherwise there will be more than one entry with the same GSI
380 * and acpi_isa_irq_to_gsi() may give wrong result.
381 */
382 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
383 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
384 isa_irq_to_gsi[bus_irq] = gsi;
385}
386
387static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
388 int polarity)
389{
390#ifdef CONFIG_X86_MPPARSE
391 struct mpc_intsrc mp_irq;
392 struct pci_dev *pdev;
393 unsigned char number;
394 unsigned int devfn;
395 int ioapic;
396 u8 pin;
397
398 if (!acpi_ioapic)
399 return 0;
400 if (!dev || !dev_is_pci(dev))
401 return 0;
402
403 pdev = to_pci_dev(dev);
404 number = pdev->bus->number;
405 devfn = pdev->devfn;
406 pin = pdev->pin;
407 /* print the entry should happen on mptable identically */
408 mp_irq.type = MP_INTSRC;
409 mp_irq.irqtype = mp_INT;
410 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
411 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
412 mp_irq.srcbus = number;
413 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
414 ioapic = mp_find_ioapic(gsi);
415 mp_irq.dstapic = mpc_ioapic_id(ioapic);
416 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
417
418 mp_save_irq(&mp_irq);
419#endif
420 return 0;
421}
422
423static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
424 u8 trigger, u32 gsi)
425{
426 struct mpc_intsrc mp_irq;
427 int ioapic, pin;
428
429 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
430 ioapic = mp_find_ioapic(gsi);
431 if (ioapic < 0) {
432 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
433 return ioapic;
434 }
435
436 pin = mp_find_ioapic_pin(ioapic, gsi);
437
438 mp_irq.type = MP_INTSRC;
439 mp_irq.irqtype = mp_INT;
440 mp_irq.irqflag = (trigger << 2) | polarity;
441 mp_irq.srcbus = MP_ISA_BUS;
442 mp_irq.srcbusirq = bus_irq;
443 mp_irq.dstapic = mpc_ioapic_id(ioapic);
444 mp_irq.dstirq = pin;
445
446 mp_save_irq(&mp_irq);
447
448 return 0;
449}
450
451static int __init
452acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
453{
454 struct acpi_madt_io_apic *ioapic = NULL;
455 struct ioapic_domain_cfg cfg = {
456 .type = IOAPIC_DOMAIN_DYNAMIC,
457 .ops = &mp_ioapic_irqdomain_ops,
458 };
459
460 ioapic = (struct acpi_madt_io_apic *)header;
461
462 if (BAD_MADT_ENTRY(ioapic, end))
463 return -EINVAL;
464
465 acpi_table_print_madt_entry(header);
466
467 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
468 if (ioapic->global_irq_base < nr_legacy_irqs())
469 cfg.type = IOAPIC_DOMAIN_LEGACY;
470
471 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
472 &cfg);
473
474 return 0;
475}
476
477/*
478 * Parse Interrupt Source Override for the ACPI SCI
479 */
480static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
481{
482 if (trigger == 0) /* compatible SCI trigger is level */
483 trigger = 3;
484
485 if (polarity == 0) /* compatible SCI polarity is low */
486 polarity = 3;
487
488 /* Command-line over-ride via acpi_sci= */
489 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
490 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
491
492 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
493 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
494
495 if (bus_irq < NR_IRQS_LEGACY)
496 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
497 else
498 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
499
500 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
501
502 /*
503 * stash over-ride to indicate we've been here
504 * and for later update of acpi_gbl_FADT
505 */
506 acpi_sci_override_gsi = gsi;
507 return;
508}
509
510static int __init
511acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
512 const unsigned long end)
513{
514 struct acpi_madt_interrupt_override *intsrc = NULL;
515
516 intsrc = (struct acpi_madt_interrupt_override *)header;
517
518 if (BAD_MADT_ENTRY(intsrc, end))
519 return -EINVAL;
520
521 acpi_table_print_madt_entry(header);
522
523 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
524 acpi_sci_ioapic_setup(intsrc->source_irq,
525 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
526 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
527 intsrc->global_irq);
528 return 0;
529 }
530
531 if (intsrc->source_irq == 0) {
532 if (acpi_skip_timer_override) {
533 printk(PREFIX "BIOS IRQ0 override ignored.\n");
534 return 0;
535 }
536
537 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
538 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
539 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
540 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
541 }
542 }
543
544 mp_override_legacy_irq(intsrc->source_irq,
545 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
546 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
547 intsrc->global_irq);
548
549 return 0;
550}
551
552static int __init
553acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
554{
555 struct acpi_madt_nmi_source *nmi_src = NULL;
556
557 nmi_src = (struct acpi_madt_nmi_source *)header;
558
559 if (BAD_MADT_ENTRY(nmi_src, end))
560 return -EINVAL;
561
562 acpi_table_print_madt_entry(header);
563
564 /* TBD: Support nimsrc entries? */
565
566 return 0;
567}
568
569#endif /* CONFIG_X86_IO_APIC */
570
571/*
572 * acpi_pic_sci_set_trigger()
573 *
574 * use ELCR to set PIC-mode trigger type for SCI
575 *
576 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
577 * it may require Edge Trigger -- use "acpi_sci=edge"
578 *
579 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
580 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
581 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
582 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
583 */
584
585void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
586{
587 unsigned int mask = 1 << irq;
588 unsigned int old, new;
589
590 /* Real old ELCR mask */
591 old = inb(0x4d0) | (inb(0x4d1) << 8);
592
593 /*
594 * If we use ACPI to set PCI IRQs, then we should clear ELCR
595 * since we will set it correctly as we enable the PCI irq
596 * routing.
597 */
598 new = acpi_noirq ? old : 0;
599
600 /*
601 * Update SCI information in the ELCR, it isn't in the PCI
602 * routing tables..
603 */
604 switch (trigger) {
605 case 1: /* Edge - clear */
606 new &= ~mask;
607 break;
608 case 3: /* Level - set */
609 new |= mask;
610 break;
611 }
612
613 if (old == new)
614 return;
615
616 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
617 outb(new, 0x4d0);
618 outb(new >> 8, 0x4d1);
619}
620
621int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
622{
623 int rc, irq, trigger, polarity;
624
625 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
626 *irqp = gsi;
627 return 0;
628 }
629
630 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
631 if (rc)
632 return rc;
633
634 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
635 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
636 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
637 if (irq < 0)
638 return irq;
639
640 *irqp = irq;
641 return 0;
642}
643EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
644
645int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
646{
647 if (isa_irq < nr_legacy_irqs() &&
648 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
649 *gsi = isa_irq_to_gsi[isa_irq];
650 return 0;
651 }
652
653 return -1;
654}
655
656static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
657 int trigger, int polarity)
658{
659#ifdef CONFIG_PCI
660 /*
661 * Make sure all (legacy) PCI IRQs are set as level-triggered.
662 */
663 if (trigger == ACPI_LEVEL_SENSITIVE)
664 elcr_set_level_irq(gsi);
665#endif
666
667 return gsi;
668}
669
670#ifdef CONFIG_X86_LOCAL_APIC
671static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
672 int trigger, int polarity)
673{
674 int irq = gsi;
675#ifdef CONFIG_X86_IO_APIC
676 int node;
677 struct irq_alloc_info info;
678
679 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
680 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
681 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
682 ioapic_set_alloc_attr(&info, node, trigger, polarity);
683
684 mutex_lock(&acpi_ioapic_lock);
685 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
686 /* Don't set up the ACPI SCI because it's already set up */
687 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
688 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
689 mutex_unlock(&acpi_ioapic_lock);
690#endif
691
692 return irq;
693}
694
695static void acpi_unregister_gsi_ioapic(u32 gsi)
696{
697#ifdef CONFIG_X86_IO_APIC
698 int irq;
699
700 mutex_lock(&acpi_ioapic_lock);
701 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
702 if (irq > 0)
703 mp_unmap_irq(irq);
704 mutex_unlock(&acpi_ioapic_lock);
705#endif
706}
707#endif
708
709int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
710 int trigger, int polarity) = acpi_register_gsi_pic;
711void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
712
713#ifdef CONFIG_ACPI_SLEEP
714int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
715#else
716int (*acpi_suspend_lowlevel)(void);
717#endif
718
719/*
720 * success: return IRQ number (>=0)
721 * failure: return < 0
722 */
723int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
724{
725 return __acpi_register_gsi(dev, gsi, trigger, polarity);
726}
727EXPORT_SYMBOL_GPL(acpi_register_gsi);
728
729void acpi_unregister_gsi(u32 gsi)
730{
731 if (__acpi_unregister_gsi)
732 __acpi_unregister_gsi(gsi);
733}
734EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
735
736#ifdef CONFIG_X86_LOCAL_APIC
737static void __init acpi_set_irq_model_ioapic(void)
738{
739 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
740 __acpi_register_gsi = acpi_register_gsi_ioapic;
741 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
742 acpi_ioapic = 1;
743}
744#endif
745
746/*
747 * ACPI based hotplug support for CPU
748 */
749#ifdef CONFIG_ACPI_HOTPLUG_CPU
750#include <acpi/processor.h>
751
752static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
753{
754#ifdef CONFIG_ACPI_NUMA
755 int nid;
756
757 nid = acpi_get_node(handle);
758 if (nid != NUMA_NO_NODE) {
759 set_apicid_to_node(physid, nid);
760 numa_set_node(cpu, nid);
761 }
762#endif
763 return 0;
764}
765
766int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
767 int *pcpu)
768{
769 int cpu;
770
771 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
772 if (cpu < 0) {
773 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
774 return cpu;
775 }
776
777 acpi_processor_set_pdc(handle);
778 acpi_map_cpu2node(handle, cpu, physid);
779
780 *pcpu = cpu;
781 return 0;
782}
783EXPORT_SYMBOL(acpi_map_cpu);
784
785int acpi_unmap_cpu(int cpu)
786{
787#ifdef CONFIG_ACPI_NUMA
788 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
789#endif
790
791 per_cpu(x86_cpu_to_apicid, cpu) = -1;
792 set_cpu_present(cpu, false);
793 num_processors--;
794
795 return (0);
796}
797EXPORT_SYMBOL(acpi_unmap_cpu);
798#endif /* CONFIG_ACPI_HOTPLUG_CPU */
799
800int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
801{
802 int ret = -ENOSYS;
803#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
804 int ioapic_id;
805 u64 addr;
806 struct ioapic_domain_cfg cfg = {
807 .type = IOAPIC_DOMAIN_DYNAMIC,
808 .ops = &mp_ioapic_irqdomain_ops,
809 };
810
811 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
812 if (ioapic_id < 0) {
813 unsigned long long uid;
814 acpi_status status;
815
816 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
817 NULL, &uid);
818 if (ACPI_FAILURE(status)) {
819 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
820 return -EINVAL;
821 }
822 ioapic_id = (int)uid;
823 }
824
825 mutex_lock(&acpi_ioapic_lock);
826 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
827 mutex_unlock(&acpi_ioapic_lock);
828#endif
829
830 return ret;
831}
832EXPORT_SYMBOL(acpi_register_ioapic);
833
834int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
835{
836 int ret = -ENOSYS;
837
838#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
839 mutex_lock(&acpi_ioapic_lock);
840 ret = mp_unregister_ioapic(gsi_base);
841 mutex_unlock(&acpi_ioapic_lock);
842#endif
843
844 return ret;
845}
846EXPORT_SYMBOL(acpi_unregister_ioapic);
847
848/**
849 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
850 * has been registered
851 * @handle: ACPI handle of the IOAPIC device
852 * @gsi_base: GSI base associated with the IOAPIC
853 *
854 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
855 * with acpi_register_ioapic()/acpi_unregister_ioapic().
856 */
857int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
858{
859 int ret = 0;
860
861#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
862 mutex_lock(&acpi_ioapic_lock);
863 ret = mp_ioapic_registered(gsi_base);
864 mutex_unlock(&acpi_ioapic_lock);
865#endif
866
867 return ret;
868}
869
870static int __init acpi_parse_sbf(struct acpi_table_header *table)
871{
872 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
873
874 sbf_port = sb->cmos_index; /* Save CMOS port */
875
876 return 0;
877}
878
879#ifdef CONFIG_HPET_TIMER
880#include <asm/hpet.h>
881
882static struct resource *hpet_res __initdata;
883
884static int __init acpi_parse_hpet(struct acpi_table_header *table)
885{
886 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
887
888 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
889 printk(KERN_WARNING PREFIX "HPET timers must be located in "
890 "memory.\n");
891 return -1;
892 }
893
894 hpet_address = hpet_tbl->address.address;
895 hpet_blockid = hpet_tbl->sequence;
896
897 /*
898 * Some broken BIOSes advertise HPET at 0x0. We really do not
899 * want to allocate a resource there.
900 */
901 if (!hpet_address) {
902 printk(KERN_WARNING PREFIX
903 "HPET id: %#x base: %#lx is invalid\n",
904 hpet_tbl->id, hpet_address);
905 return 0;
906 }
907#ifdef CONFIG_X86_64
908 /*
909 * Some even more broken BIOSes advertise HPET at
910 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
911 * some noise:
912 */
913 if (hpet_address == 0xfed0000000000000UL) {
914 if (!hpet_force_user) {
915 printk(KERN_WARNING PREFIX "HPET id: %#x "
916 "base: 0xfed0000000000000 is bogus\n "
917 "try hpet=force on the kernel command line to "
918 "fix it up to 0xfed00000.\n", hpet_tbl->id);
919 hpet_address = 0;
920 return 0;
921 }
922 printk(KERN_WARNING PREFIX
923 "HPET id: %#x base: 0xfed0000000000000 fixed up "
924 "to 0xfed00000.\n", hpet_tbl->id);
925 hpet_address >>= 32;
926 }
927#endif
928 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
929 hpet_tbl->id, hpet_address);
930
931 /*
932 * Allocate and initialize the HPET firmware resource for adding into
933 * the resource tree during the lateinit timeframe.
934 */
935#define HPET_RESOURCE_NAME_SIZE 9
936 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
937 SMP_CACHE_BYTES);
938 if (!hpet_res)
939 panic("%s: Failed to allocate %zu bytes\n", __func__,
940 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
941
942 hpet_res->name = (void *)&hpet_res[1];
943 hpet_res->flags = IORESOURCE_MEM;
944 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
945 hpet_tbl->sequence);
946
947 hpet_res->start = hpet_address;
948 hpet_res->end = hpet_address + (1 * 1024) - 1;
949
950 return 0;
951}
952
953/*
954 * hpet_insert_resource inserts the HPET resources used into the resource
955 * tree.
956 */
957static __init int hpet_insert_resource(void)
958{
959 if (!hpet_res)
960 return 1;
961
962 return insert_resource(&iomem_resource, hpet_res);
963}
964
965late_initcall(hpet_insert_resource);
966
967#else
968#define acpi_parse_hpet NULL
969#endif
970
971static int __init acpi_parse_fadt(struct acpi_table_header *table)
972{
973 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
974 pr_debug("ACPI: no legacy devices present\n");
975 x86_platform.legacy.devices.pnpbios = 0;
976 }
977
978 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
979 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
980 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
981 pr_debug("ACPI: i8042 controller is absent\n");
982 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
983 }
984
985 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
986 pr_debug("ACPI: not registering RTC platform device\n");
987 x86_platform.legacy.rtc = 0;
988 }
989
990 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
991 pr_debug("ACPI: probing for VGA not safe\n");
992 x86_platform.legacy.no_vga = 1;
993 }
994
995#ifdef CONFIG_X86_PM_TIMER
996 /* detect the location of the ACPI PM Timer */
997 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
998 /* FADT rev. 2 */
999 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
1000 ACPI_ADR_SPACE_SYSTEM_IO)
1001 return 0;
1002
1003 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
1004 /*
1005 * "X" fields are optional extensions to the original V1.0
1006 * fields, so we must selectively expand V1.0 fields if the
1007 * corresponding X field is zero.
1008 */
1009 if (!pmtmr_ioport)
1010 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1011 } else {
1012 /* FADT rev. 1 */
1013 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1014 }
1015 if (pmtmr_ioport)
1016 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1017 pmtmr_ioport);
1018#endif
1019 return 0;
1020}
1021
1022#ifdef CONFIG_X86_LOCAL_APIC
1023/*
1024 * Parse LAPIC entries in MADT
1025 * returns 0 on success, < 0 on error
1026 */
1027
1028static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1029{
1030 int count;
1031
1032 if (!boot_cpu_has(X86_FEATURE_APIC))
1033 return -ENODEV;
1034
1035 /*
1036 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1037 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1038 */
1039
1040 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1041 acpi_parse_lapic_addr_ovr, 0);
1042 if (count < 0) {
1043 printk(KERN_ERR PREFIX
1044 "Error parsing LAPIC address override entry\n");
1045 return count;
1046 }
1047
1048 register_lapic_address(acpi_lapic_addr);
1049
1050 return count;
1051}
1052
1053static int __init acpi_parse_madt_lapic_entries(void)
1054{
1055 int count;
1056 int x2count = 0;
1057 int ret;
1058 struct acpi_subtable_proc madt_proc[2];
1059
1060 if (!boot_cpu_has(X86_FEATURE_APIC))
1061 return -ENODEV;
1062
1063 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1064 acpi_parse_sapic, MAX_LOCAL_APIC);
1065
1066 if (!count) {
1067 memset(madt_proc, 0, sizeof(madt_proc));
1068 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1069 madt_proc[0].handler = acpi_parse_lapic;
1070 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1071 madt_proc[1].handler = acpi_parse_x2apic;
1072 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1073 sizeof(struct acpi_table_madt),
1074 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1075 if (ret < 0) {
1076 printk(KERN_ERR PREFIX
1077 "Error parsing LAPIC/X2APIC entries\n");
1078 return ret;
1079 }
1080
1081 count = madt_proc[0].count;
1082 x2count = madt_proc[1].count;
1083 }
1084 if (!count && !x2count) {
1085 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1086 /* TBD: Cleanup to allow fallback to MPS */
1087 return -ENODEV;
1088 } else if (count < 0 || x2count < 0) {
1089 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1090 /* TBD: Cleanup to allow fallback to MPS */
1091 return count;
1092 }
1093
1094 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1095 acpi_parse_x2apic_nmi, 0);
1096 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1097 acpi_parse_lapic_nmi, 0);
1098 if (count < 0 || x2count < 0) {
1099 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1100 /* TBD: Cleanup to allow fallback to MPS */
1101 return count;
1102 }
1103 return 0;
1104}
1105#endif /* CONFIG_X86_LOCAL_APIC */
1106
1107#ifdef CONFIG_X86_IO_APIC
1108static void __init mp_config_acpi_legacy_irqs(void)
1109{
1110 int i;
1111 struct mpc_intsrc mp_irq;
1112
1113#ifdef CONFIG_EISA
1114 /*
1115 * Fabricate the legacy ISA bus (bus #31).
1116 */
1117 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1118#endif
1119 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1120 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1121
1122 /*
1123 * Use the default configuration for the IRQs 0-15. Unless
1124 * overridden by (MADT) interrupt source override entries.
1125 */
1126 for (i = 0; i < nr_legacy_irqs(); i++) {
1127 int ioapic, pin;
1128 unsigned int dstapic;
1129 int idx;
1130 u32 gsi;
1131
1132 /* Locate the gsi that irq i maps to. */
1133 if (acpi_isa_irq_to_gsi(i, &gsi))
1134 continue;
1135
1136 /*
1137 * Locate the IOAPIC that manages the ISA IRQ.
1138 */
1139 ioapic = mp_find_ioapic(gsi);
1140 if (ioapic < 0)
1141 continue;
1142 pin = mp_find_ioapic_pin(ioapic, gsi);
1143 dstapic = mpc_ioapic_id(ioapic);
1144
1145 for (idx = 0; idx < mp_irq_entries; idx++) {
1146 struct mpc_intsrc *irq = mp_irqs + idx;
1147
1148 /* Do we already have a mapping for this ISA IRQ? */
1149 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1150 break;
1151
1152 /* Do we already have a mapping for this IOAPIC pin */
1153 if (irq->dstapic == dstapic && irq->dstirq == pin)
1154 break;
1155 }
1156
1157 if (idx != mp_irq_entries) {
1158 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1159 continue; /* IRQ already used */
1160 }
1161
1162 mp_irq.type = MP_INTSRC;
1163 mp_irq.irqflag = 0; /* Conforming */
1164 mp_irq.srcbus = MP_ISA_BUS;
1165 mp_irq.dstapic = dstapic;
1166 mp_irq.irqtype = mp_INT;
1167 mp_irq.srcbusirq = i; /* Identity mapped */
1168 mp_irq.dstirq = pin;
1169
1170 mp_save_irq(&mp_irq);
1171 }
1172}
1173
1174/*
1175 * Parse IOAPIC related entries in MADT
1176 * returns 0 on success, < 0 on error
1177 */
1178static int __init acpi_parse_madt_ioapic_entries(void)
1179{
1180 int count;
1181
1182 /*
1183 * ACPI interpreter is required to complete interrupt setup,
1184 * so if it is off, don't enumerate the io-apics with ACPI.
1185 * If MPS is present, it will handle them,
1186 * otherwise the system will stay in PIC mode
1187 */
1188 if (acpi_disabled || acpi_noirq)
1189 return -ENODEV;
1190
1191 if (!boot_cpu_has(X86_FEATURE_APIC))
1192 return -ENODEV;
1193
1194 /*
1195 * if "noapic" boot option, don't look for IO-APICs
1196 */
1197 if (skip_ioapic_setup) {
1198 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1199 "due to 'noapic' option.\n");
1200 return -ENODEV;
1201 }
1202
1203 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1204 MAX_IO_APICS);
1205 if (!count) {
1206 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1207 return -ENODEV;
1208 } else if (count < 0) {
1209 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1210 return count;
1211 }
1212
1213 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1214 acpi_parse_int_src_ovr, nr_irqs);
1215 if (count < 0) {
1216 printk(KERN_ERR PREFIX
1217 "Error parsing interrupt source overrides entry\n");
1218 /* TBD: Cleanup to allow fallback to MPS */
1219 return count;
1220 }
1221
1222 /*
1223 * If BIOS did not supply an INT_SRC_OVR for the SCI
1224 * pretend we got one so we can set the SCI flags.
1225 * But ignore setting up SCI on hardware reduced platforms.
1226 */
1227 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1228 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1229 acpi_gbl_FADT.sci_interrupt);
1230
1231 /* Fill in identity legacy mappings where no override */
1232 mp_config_acpi_legacy_irqs();
1233
1234 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1235 acpi_parse_nmi_src, nr_irqs);
1236 if (count < 0) {
1237 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1238 /* TBD: Cleanup to allow fallback to MPS */
1239 return count;
1240 }
1241
1242 return 0;
1243}
1244#else
1245static inline int acpi_parse_madt_ioapic_entries(void)
1246{
1247 return -1;
1248}
1249#endif /* !CONFIG_X86_IO_APIC */
1250
1251static void __init early_acpi_process_madt(void)
1252{
1253#ifdef CONFIG_X86_LOCAL_APIC
1254 int error;
1255
1256 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1257
1258 /*
1259 * Parse MADT LAPIC entries
1260 */
1261 error = early_acpi_parse_madt_lapic_addr_ovr();
1262 if (!error) {
1263 acpi_lapic = 1;
1264 smp_found_config = 1;
1265 }
1266 if (error == -EINVAL) {
1267 /*
1268 * Dell Precision Workstation 410, 610 come here.
1269 */
1270 printk(KERN_ERR PREFIX
1271 "Invalid BIOS MADT, disabling ACPI\n");
1272 disable_acpi();
1273 }
1274 }
1275#endif
1276}
1277
1278static void __init acpi_process_madt(void)
1279{
1280#ifdef CONFIG_X86_LOCAL_APIC
1281 int error;
1282
1283 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1284
1285 /*
1286 * Parse MADT LAPIC entries
1287 */
1288 error = acpi_parse_madt_lapic_entries();
1289 if (!error) {
1290 acpi_lapic = 1;
1291
1292 /*
1293 * Parse MADT IO-APIC entries
1294 */
1295 mutex_lock(&acpi_ioapic_lock);
1296 error = acpi_parse_madt_ioapic_entries();
1297 mutex_unlock(&acpi_ioapic_lock);
1298 if (!error) {
1299 acpi_set_irq_model_ioapic();
1300
1301 smp_found_config = 1;
1302 }
1303 }
1304 if (error == -EINVAL) {
1305 /*
1306 * Dell Precision Workstation 410, 610 come here.
1307 */
1308 printk(KERN_ERR PREFIX
1309 "Invalid BIOS MADT, disabling ACPI\n");
1310 disable_acpi();
1311 }
1312 } else {
1313 /*
1314 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1315 * In the event an MPS table was found, forget it.
1316 * Boot with "acpi=off" to use MPS on such a system.
1317 */
1318 if (smp_found_config) {
1319 printk(KERN_WARNING PREFIX
1320 "No APIC-table, disabling MPS\n");
1321 smp_found_config = 0;
1322 }
1323 }
1324
1325 /*
1326 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1327 * processors, where MPS only supports physical.
1328 */
1329 if (acpi_lapic && acpi_ioapic)
1330 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1331 "information\n");
1332 else if (acpi_lapic)
1333 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1334 "configuration information\n");
1335#endif
1336 return;
1337}
1338
1339static int __init disable_acpi_irq(const struct dmi_system_id *d)
1340{
1341 if (!acpi_force) {
1342 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1343 d->ident);
1344 acpi_noirq_set();
1345 }
1346 return 0;
1347}
1348
1349static int __init disable_acpi_pci(const struct dmi_system_id *d)
1350{
1351 if (!acpi_force) {
1352 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1353 d->ident);
1354 acpi_disable_pci();
1355 }
1356 return 0;
1357}
1358
1359static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1360{
1361 if (!acpi_force) {
1362 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1363 disable_acpi();
1364 } else {
1365 printk(KERN_NOTICE
1366 "Warning: DMI blacklist says broken, but acpi forced\n");
1367 }
1368 return 0;
1369}
1370
1371/*
1372 * Force ignoring BIOS IRQ0 override
1373 */
1374static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1375{
1376 if (!acpi_skip_timer_override) {
1377 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1378 d->ident);
1379 acpi_skip_timer_override = 1;
1380 }
1381 return 0;
1382}
1383
1384/*
1385 * ACPI offers an alternative platform interface model that removes
1386 * ACPI hardware requirements for platforms that do not implement
1387 * the PC Architecture.
1388 *
1389 * We initialize the Hardware-reduced ACPI model here:
1390 */
1391void __init acpi_generic_reduced_hw_init(void)
1392{
1393 /*
1394 * Override x86_init functions and bypass legacy PIC in
1395 * hardware reduced ACPI mode.
1396 */
1397 x86_init.timers.timer_init = x86_init_noop;
1398 x86_init.irqs.pre_vector_init = x86_init_noop;
1399 legacy_pic = &null_legacy_pic;
1400}
1401
1402static void __init acpi_reduced_hw_init(void)
1403{
1404 if (acpi_gbl_reduced_hardware)
1405 x86_init.acpi.reduced_hw_early_init();
1406}
1407
1408/*
1409 * If your system is blacklisted here, but you find that acpi=force
1410 * works for you, please contact linux-acpi@vger.kernel.org
1411 */
1412static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1413 /*
1414 * Boxes that need ACPI disabled
1415 */
1416 {
1417 .callback = dmi_disable_acpi,
1418 .ident = "IBM Thinkpad",
1419 .matches = {
1420 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1421 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1422 },
1423 },
1424
1425 /*
1426 * Boxes that need ACPI PCI IRQ routing disabled
1427 */
1428 {
1429 .callback = disable_acpi_irq,
1430 .ident = "ASUS A7V",
1431 .matches = {
1432 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1433 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1434 /* newer BIOS, Revision 1011, does work */
1435 DMI_MATCH(DMI_BIOS_VERSION,
1436 "ASUS A7V ACPI BIOS Revision 1007"),
1437 },
1438 },
1439 {
1440 /*
1441 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1442 * for LPC bridge, which is needed for the PCI
1443 * interrupt links to work. DSDT fix is in bug 5966.
1444 * 2645, 2646 model numbers are shared with 600/600E/600X
1445 */
1446 .callback = disable_acpi_irq,
1447 .ident = "IBM Thinkpad 600 Series 2645",
1448 .matches = {
1449 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1450 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1451 },
1452 },
1453 {
1454 .callback = disable_acpi_irq,
1455 .ident = "IBM Thinkpad 600 Series 2646",
1456 .matches = {
1457 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1458 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1459 },
1460 },
1461 /*
1462 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1463 */
1464 { /* _BBN 0 bug */
1465 .callback = disable_acpi_pci,
1466 .ident = "ASUS PR-DLS",
1467 .matches = {
1468 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1469 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1470 DMI_MATCH(DMI_BIOS_VERSION,
1471 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1472 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1473 },
1474 },
1475 {
1476 .callback = disable_acpi_pci,
1477 .ident = "Acer TravelMate 36x Laptop",
1478 .matches = {
1479 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1480 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1481 },
1482 },
1483 {}
1484};
1485
1486/* second table for DMI checks that should run after early-quirks */
1487static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1488 /*
1489 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1490 * which includes some code which overrides all temperature
1491 * trip points to 16C if the INTIN2 input of the I/O APIC
1492 * is enabled. This input is incorrectly designated the
1493 * ISA IRQ 0 via an interrupt source override even though
1494 * it is wired to the output of the master 8259A and INTIN0
1495 * is not connected at all. Force ignoring BIOS IRQ0
1496 * override in that cases.
1497 */
1498 {
1499 .callback = dmi_ignore_irq0_timer_override,
1500 .ident = "HP nx6115 laptop",
1501 .matches = {
1502 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1503 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1504 },
1505 },
1506 {
1507 .callback = dmi_ignore_irq0_timer_override,
1508 .ident = "HP NX6125 laptop",
1509 .matches = {
1510 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1511 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1512 },
1513 },
1514 {
1515 .callback = dmi_ignore_irq0_timer_override,
1516 .ident = "HP NX6325 laptop",
1517 .matches = {
1518 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1519 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1520 },
1521 },
1522 {
1523 .callback = dmi_ignore_irq0_timer_override,
1524 .ident = "HP 6715b laptop",
1525 .matches = {
1526 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1527 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1528 },
1529 },
1530 {
1531 .callback = dmi_ignore_irq0_timer_override,
1532 .ident = "FUJITSU SIEMENS",
1533 .matches = {
1534 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1535 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1536 },
1537 },
1538 {}
1539};
1540
1541/*
1542 * acpi_boot_table_init() and acpi_boot_init()
1543 * called from setup_arch(), always.
1544 * 1. checksums all tables
1545 * 2. enumerates lapics
1546 * 3. enumerates io-apics
1547 *
1548 * acpi_table_init() is separate to allow reading SRAT without
1549 * other side effects.
1550 *
1551 * side effects of acpi_boot_init:
1552 * acpi_lapic = 1 if LAPIC found
1553 * acpi_ioapic = 1 if IOAPIC found
1554 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1555 * if acpi_blacklisted() acpi_disabled = 1;
1556 * acpi_irq_model=...
1557 * ...
1558 */
1559
1560void __init acpi_boot_table_init(void)
1561{
1562 dmi_check_system(acpi_dmi_table);
1563
1564 /*
1565 * If acpi_disabled, bail out
1566 */
1567 if (acpi_disabled)
1568 return;
1569
1570 /*
1571 * Initialize the ACPI boot-time table parser.
1572 */
1573 if (acpi_table_init()) {
1574 disable_acpi();
1575 return;
1576 }
1577
1578 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1579
1580 /*
1581 * blacklist may disable ACPI entirely
1582 */
1583 if (acpi_blacklisted()) {
1584 if (acpi_force) {
1585 printk(KERN_WARNING PREFIX "acpi=force override\n");
1586 } else {
1587 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1588 disable_acpi();
1589 return;
1590 }
1591 }
1592}
1593
1594int __init early_acpi_boot_init(void)
1595{
1596 /*
1597 * If acpi_disabled, bail out
1598 */
1599 if (acpi_disabled)
1600 return 1;
1601
1602 /*
1603 * Process the Multiple APIC Description Table (MADT), if present
1604 */
1605 early_acpi_process_madt();
1606
1607 /*
1608 * Hardware-reduced ACPI mode initialization:
1609 */
1610 acpi_reduced_hw_init();
1611
1612 return 0;
1613}
1614
1615int __init acpi_boot_init(void)
1616{
1617 /* those are executed after early-quirks are executed */
1618 dmi_check_system(acpi_dmi_table_late);
1619
1620 /*
1621 * If acpi_disabled, bail out
1622 */
1623 if (acpi_disabled)
1624 return 1;
1625
1626 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1627
1628 /*
1629 * set sci_int and PM timer address
1630 */
1631 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1632
1633 /*
1634 * Process the Multiple APIC Description Table (MADT), if present
1635 */
1636 acpi_process_madt();
1637
1638 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1639 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1640 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1641
1642 if (!acpi_noirq)
1643 x86_init.pci.init = pci_acpi_init;
1644
1645 /* Do not enable ACPI SPCR console by default */
1646 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1647 return 0;
1648}
1649
1650static int __init parse_acpi(char *arg)
1651{
1652 if (!arg)
1653 return -EINVAL;
1654
1655 /* "acpi=off" disables both ACPI table parsing and interpreter */
1656 if (strcmp(arg, "off") == 0) {
1657 disable_acpi();
1658 }
1659 /* acpi=force to over-ride black-list */
1660 else if (strcmp(arg, "force") == 0) {
1661 acpi_force = 1;
1662 acpi_disabled = 0;
1663 }
1664 /* acpi=strict disables out-of-spec workarounds */
1665 else if (strcmp(arg, "strict") == 0) {
1666 acpi_strict = 1;
1667 }
1668 /* acpi=rsdt use RSDT instead of XSDT */
1669 else if (strcmp(arg, "rsdt") == 0) {
1670 acpi_gbl_do_not_use_xsdt = TRUE;
1671 }
1672 /* "acpi=noirq" disables ACPI interrupt routing */
1673 else if (strcmp(arg, "noirq") == 0) {
1674 acpi_noirq_set();
1675 }
1676 /* "acpi=copy_dsdt" copys DSDT */
1677 else if (strcmp(arg, "copy_dsdt") == 0) {
1678 acpi_gbl_copy_dsdt_locally = 1;
1679 }
1680 /* "acpi=nocmcff" disables FF mode for corrected errors */
1681 else if (strcmp(arg, "nocmcff") == 0) {
1682 acpi_disable_cmcff = 1;
1683 } else {
1684 /* Core will printk when we return error. */
1685 return -EINVAL;
1686 }
1687 return 0;
1688}
1689early_param("acpi", parse_acpi);
1690
1691/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1692static int __init parse_pci(char *arg)
1693{
1694 if (arg && strcmp(arg, "noacpi") == 0)
1695 acpi_disable_pci();
1696 return 0;
1697}
1698early_param("pci", parse_pci);
1699
1700int __init acpi_mps_check(void)
1701{
1702#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1703/* mptable code is not built-in*/
1704 if (acpi_disabled || acpi_noirq) {
1705 printk(KERN_WARNING "MPS support code is not built-in.\n"
1706 "Using acpi=off or acpi=noirq or pci=noacpi "
1707 "may have problem\n");
1708 return 1;
1709 }
1710#endif
1711 return 0;
1712}
1713
1714#ifdef CONFIG_X86_IO_APIC
1715static int __init parse_acpi_skip_timer_override(char *arg)
1716{
1717 acpi_skip_timer_override = 1;
1718 return 0;
1719}
1720early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1721
1722static int __init parse_acpi_use_timer_override(char *arg)
1723{
1724 acpi_use_timer_override = 1;
1725 return 0;
1726}
1727early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1728#endif /* CONFIG_X86_IO_APIC */
1729
1730static int __init setup_acpi_sci(char *s)
1731{
1732 if (!s)
1733 return -EINVAL;
1734 if (!strcmp(s, "edge"))
1735 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1736 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1737 else if (!strcmp(s, "level"))
1738 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1739 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1740 else if (!strcmp(s, "high"))
1741 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1742 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1743 else if (!strcmp(s, "low"))
1744 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1745 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1746 else
1747 return -EINVAL;
1748 return 0;
1749}
1750early_param("acpi_sci", setup_acpi_sci);
1751
1752int __acpi_acquire_global_lock(unsigned int *lock)
1753{
1754 unsigned int old, new, val;
1755 do {
1756 old = *lock;
1757 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1758 val = cmpxchg(lock, old, new);
1759 } while (unlikely (val != old));
1760 return (new < 3) ? -1 : 0;
1761}
1762
1763int __acpi_release_global_lock(unsigned int *lock)
1764{
1765 unsigned int old, new, val;
1766 do {
1767 old = *lock;
1768 new = old & ~0x3;
1769 val = cmpxchg(lock, old, new);
1770 } while (unlikely (val != old));
1771 return old & 0x1;
1772}
1773
1774void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1775{
1776 e820__range_add(addr, size, E820_TYPE_ACPI);
1777 e820__update_table_print();
1778}
1779
1780u64 x86_default_get_root_pointer(void)
1781{
1782 return boot_params.acpi_rsdp_addr;
1783}
1784