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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/module.h>
32#include <linux/dmi.h>
33#include <linux/irq.h>
34#include <linux/slab.h>
35#include <linux/bootmem.h>
36#include <linux/ioport.h>
37#include <linux/pci.h>
38
39#include <asm/irqdomain.h>
40#include <asm/pci_x86.h>
41#include <asm/pgtable.h>
42#include <asm/io_apic.h>
43#include <asm/apic.h>
44#include <asm/io.h>
45#include <asm/mpspec.h>
46#include <asm/smp.h>
47#include <asm/i8259.h>
48
49#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50static int __initdata acpi_force = 0;
51int acpi_disabled;
52EXPORT_SYMBOL(acpi_disabled);
53
54#ifdef CONFIG_X86_64
55# include <asm/proto.h>
56#endif /* X86 */
57
58#define PREFIX "ACPI: "
59
60int acpi_noirq; /* skip ACPI IRQ initialization */
61int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
62EXPORT_SYMBOL(acpi_pci_disabled);
63
64int acpi_lapic;
65int acpi_ioapic;
66int acpi_strict;
67int acpi_disable_cmcff;
68
69u8 acpi_sci_flags __initdata;
70int acpi_sci_override_gsi __initdata;
71int acpi_skip_timer_override __initdata;
72int acpi_use_timer_override __initdata;
73int acpi_fix_pin2_polarity __initdata;
74
75#ifdef CONFIG_X86_LOCAL_APIC
76static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
77#endif
78
79/*
80 * Locks related to IOAPIC hotplug
81 * Hotplug side:
82 * ->device_hotplug_lock
83 * ->acpi_ioapic_lock
84 * ->ioapic_lock
85 * Interrupt mapping side:
86 * ->acpi_ioapic_lock
87 * ->ioapic_mutex
88 * ->ioapic_lock
89 */
90static DEFINE_MUTEX(acpi_ioapic_lock);
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#define ACPI_INVALID_GSI INT_MIN
112
113/*
114 * This is just a simple wrapper around early_ioremap(),
115 * with sanity checks for phys == 0 and size == 0.
116 */
117char *__init __acpi_map_table(unsigned long phys, unsigned long size)
118{
119
120 if (!phys || !size)
121 return NULL;
122
123 return early_ioremap(phys, size);
124}
125
126void __init __acpi_unmap_table(char *map, unsigned long size)
127{
128 if (!map || !size)
129 return;
130
131 early_iounmap(map, size);
132}
133
134#ifdef CONFIG_X86_LOCAL_APIC
135static int __init acpi_parse_madt(struct acpi_table_header *table)
136{
137 struct acpi_table_madt *madt = NULL;
138
139 if (!cpu_has_apic)
140 return -EINVAL;
141
142 madt = (struct acpi_table_madt *)table;
143 if (!madt) {
144 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
145 return -ENODEV;
146 }
147
148 if (madt->address) {
149 acpi_lapic_addr = (u64) madt->address;
150
151 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
152 madt->address);
153 }
154
155 default_acpi_madt_oem_check(madt->header.oem_id,
156 madt->header.oem_table_id);
157
158 return 0;
159}
160
161/**
162 * acpi_register_lapic - register a local apic and generates a logic cpu number
163 * @id: local apic id to register
164 * @enabled: this cpu is enabled or not
165 *
166 * Returns the logic cpu number which maps to the local apic
167 */
168static int acpi_register_lapic(int id, u8 enabled)
169{
170 unsigned int ver = 0;
171
172 if (id >= MAX_LOCAL_APIC) {
173 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
174 return -EINVAL;
175 }
176
177 if (!enabled) {
178 ++disabled_cpus;
179 return -EINVAL;
180 }
181
182 if (boot_cpu_physical_apicid != -1U)
183 ver = apic_version[boot_cpu_physical_apicid];
184
185 return generic_processor_info(id, ver);
186}
187
188static int __init
189acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
190{
191 struct acpi_madt_local_x2apic *processor = NULL;
192 int apic_id;
193 u8 enabled;
194
195 processor = (struct acpi_madt_local_x2apic *)header;
196
197 if (BAD_MADT_ENTRY(processor, end))
198 return -EINVAL;
199
200 acpi_table_print_madt_entry(header);
201
202 apic_id = processor->local_apic_id;
203 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
204#ifdef CONFIG_X86_X2APIC
205 /*
206 * We need to register disabled CPU as well to permit
207 * counting disabled CPUs. This allows us to size
208 * cpus_possible_map more accurately, to permit
209 * to not preallocating memory for all NR_CPUS
210 * when we use CPU hotplug.
211 */
212 if (!apic->apic_id_valid(apic_id) && enabled)
213 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
214 else
215 acpi_register_lapic(apic_id, enabled);
216#else
217 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
218#endif
219
220 return 0;
221}
222
223static int __init
224acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
225{
226 struct acpi_madt_local_apic *processor = NULL;
227
228 processor = (struct acpi_madt_local_apic *)header;
229
230 if (BAD_MADT_ENTRY(processor, end))
231 return -EINVAL;
232
233 acpi_table_print_madt_entry(header);
234
235 /*
236 * We need to register disabled CPU as well to permit
237 * counting disabled CPUs. This allows us to size
238 * cpus_possible_map more accurately, to permit
239 * to not preallocating memory for all NR_CPUS
240 * when we use CPU hotplug.
241 */
242 acpi_register_lapic(processor->id, /* APIC ID */
243 processor->lapic_flags & ACPI_MADT_ENABLED);
244
245 return 0;
246}
247
248static int __init
249acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
250{
251 struct acpi_madt_local_sapic *processor = NULL;
252
253 processor = (struct acpi_madt_local_sapic *)header;
254
255 if (BAD_MADT_ENTRY(processor, end))
256 return -EINVAL;
257
258 acpi_table_print_madt_entry(header);
259
260 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
261 processor->lapic_flags & ACPI_MADT_ENABLED);
262
263 return 0;
264}
265
266static int __init
267acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
268 const unsigned long end)
269{
270 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
271
272 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
273
274 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
275 return -EINVAL;
276
277 acpi_lapic_addr = lapic_addr_ovr->address;
278
279 return 0;
280}
281
282static int __init
283acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
284 const unsigned long end)
285{
286 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
287
288 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
289
290 if (BAD_MADT_ENTRY(x2apic_nmi, end))
291 return -EINVAL;
292
293 acpi_table_print_madt_entry(header);
294
295 if (x2apic_nmi->lint != 1)
296 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
297
298 return 0;
299}
300
301static int __init
302acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
303{
304 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
305
306 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
307
308 if (BAD_MADT_ENTRY(lapic_nmi, end))
309 return -EINVAL;
310
311 acpi_table_print_madt_entry(header);
312
313 if (lapic_nmi->lint != 1)
314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
315
316 return 0;
317}
318
319#endif /*CONFIG_X86_LOCAL_APIC */
320
321#ifdef CONFIG_X86_IO_APIC
322#define MP_ISA_BUS 0
323
324static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
325 u32 gsi)
326{
327 int ioapic;
328 int pin;
329 struct mpc_intsrc mp_irq;
330
331 /*
332 * Convert 'gsi' to 'ioapic.pin'.
333 */
334 ioapic = mp_find_ioapic(gsi);
335 if (ioapic < 0)
336 return;
337 pin = mp_find_ioapic_pin(ioapic, gsi);
338
339 /*
340 * TBD: This check is for faulty timer entries, where the override
341 * erroneously sets the trigger to level, resulting in a HUGE
342 * increase of timer interrupts!
343 */
344 if ((bus_irq == 0) && (trigger == 3))
345 trigger = 1;
346
347 mp_irq.type = MP_INTSRC;
348 mp_irq.irqtype = mp_INT;
349 mp_irq.irqflag = (trigger << 2) | polarity;
350 mp_irq.srcbus = MP_ISA_BUS;
351 mp_irq.srcbusirq = bus_irq; /* IRQ */
352 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
353 mp_irq.dstirq = pin; /* INTIN# */
354
355 mp_save_irq(&mp_irq);
356
357 /*
358 * Reset default identity mapping if gsi is also an legacy IRQ,
359 * otherwise there will be more than one entry with the same GSI
360 * and acpi_isa_irq_to_gsi() may give wrong result.
361 */
362 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
363 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
364 isa_irq_to_gsi[bus_irq] = gsi;
365}
366
367static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
368 int polarity)
369{
370#ifdef CONFIG_X86_MPPARSE
371 struct mpc_intsrc mp_irq;
372 struct pci_dev *pdev;
373 unsigned char number;
374 unsigned int devfn;
375 int ioapic;
376 u8 pin;
377
378 if (!acpi_ioapic)
379 return 0;
380 if (!dev || !dev_is_pci(dev))
381 return 0;
382
383 pdev = to_pci_dev(dev);
384 number = pdev->bus->number;
385 devfn = pdev->devfn;
386 pin = pdev->pin;
387 /* print the entry should happen on mptable identically */
388 mp_irq.type = MP_INTSRC;
389 mp_irq.irqtype = mp_INT;
390 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
391 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
392 mp_irq.srcbus = number;
393 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
394 ioapic = mp_find_ioapic(gsi);
395 mp_irq.dstapic = mpc_ioapic_id(ioapic);
396 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
397
398 mp_save_irq(&mp_irq);
399#endif
400 return 0;
401}
402
403static int __init
404acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
405{
406 struct acpi_madt_io_apic *ioapic = NULL;
407 struct ioapic_domain_cfg cfg = {
408 .type = IOAPIC_DOMAIN_DYNAMIC,
409 .ops = &mp_ioapic_irqdomain_ops,
410 };
411
412 ioapic = (struct acpi_madt_io_apic *)header;
413
414 if (BAD_MADT_ENTRY(ioapic, end))
415 return -EINVAL;
416
417 acpi_table_print_madt_entry(header);
418
419 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
420 if (ioapic->global_irq_base < nr_legacy_irqs())
421 cfg.type = IOAPIC_DOMAIN_LEGACY;
422
423 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
424 &cfg);
425
426 return 0;
427}
428
429/*
430 * Parse Interrupt Source Override for the ACPI SCI
431 */
432static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
433{
434 if (trigger == 0) /* compatible SCI trigger is level */
435 trigger = 3;
436
437 if (polarity == 0) /* compatible SCI polarity is low */
438 polarity = 3;
439
440 /* Command-line over-ride via acpi_sci= */
441 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
442 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
443
444 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
445 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
446
447 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
448 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
449
450 /*
451 * stash over-ride to indicate we've been here
452 * and for later update of acpi_gbl_FADT
453 */
454 acpi_sci_override_gsi = gsi;
455 return;
456}
457
458static int __init
459acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
460 const unsigned long end)
461{
462 struct acpi_madt_interrupt_override *intsrc = NULL;
463
464 intsrc = (struct acpi_madt_interrupt_override *)header;
465
466 if (BAD_MADT_ENTRY(intsrc, end))
467 return -EINVAL;
468
469 acpi_table_print_madt_entry(header);
470
471 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
472 acpi_sci_ioapic_setup(intsrc->source_irq,
473 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
474 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
475 intsrc->global_irq);
476 return 0;
477 }
478
479 if (intsrc->source_irq == 0) {
480 if (acpi_skip_timer_override) {
481 printk(PREFIX "BIOS IRQ0 override ignored.\n");
482 return 0;
483 }
484
485 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
486 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
487 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
488 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
489 }
490 }
491
492 mp_override_legacy_irq(intsrc->source_irq,
493 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
494 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
495 intsrc->global_irq);
496
497 return 0;
498}
499
500static int __init
501acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
502{
503 struct acpi_madt_nmi_source *nmi_src = NULL;
504
505 nmi_src = (struct acpi_madt_nmi_source *)header;
506
507 if (BAD_MADT_ENTRY(nmi_src, end))
508 return -EINVAL;
509
510 acpi_table_print_madt_entry(header);
511
512 /* TBD: Support nimsrc entries? */
513
514 return 0;
515}
516
517#endif /* CONFIG_X86_IO_APIC */
518
519/*
520 * acpi_pic_sci_set_trigger()
521 *
522 * use ELCR to set PIC-mode trigger type for SCI
523 *
524 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
525 * it may require Edge Trigger -- use "acpi_sci=edge"
526 *
527 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
528 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
529 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
530 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
531 */
532
533void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
534{
535 unsigned int mask = 1 << irq;
536 unsigned int old, new;
537
538 /* Real old ELCR mask */
539 old = inb(0x4d0) | (inb(0x4d1) << 8);
540
541 /*
542 * If we use ACPI to set PCI IRQs, then we should clear ELCR
543 * since we will set it correctly as we enable the PCI irq
544 * routing.
545 */
546 new = acpi_noirq ? old : 0;
547
548 /*
549 * Update SCI information in the ELCR, it isn't in the PCI
550 * routing tables..
551 */
552 switch (trigger) {
553 case 1: /* Edge - clear */
554 new &= ~mask;
555 break;
556 case 3: /* Level - set */
557 new |= mask;
558 break;
559 }
560
561 if (old == new)
562 return;
563
564 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
565 outb(new, 0x4d0);
566 outb(new >> 8, 0x4d1);
567}
568
569int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
570{
571 int rc, irq, trigger, polarity;
572
573 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
574 *irqp = gsi;
575 return 0;
576 }
577
578 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
579 if (rc == 0) {
580 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
581 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
582 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
583 if (irq >= 0) {
584 *irqp = irq;
585 return 0;
586 }
587 }
588
589 return -1;
590}
591EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
592
593int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
594{
595 if (isa_irq < nr_legacy_irqs() &&
596 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
597 *gsi = isa_irq_to_gsi[isa_irq];
598 return 0;
599 }
600
601 return -1;
602}
603
604static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
605 int trigger, int polarity)
606{
607#ifdef CONFIG_PCI
608 /*
609 * Make sure all (legacy) PCI IRQs are set as level-triggered.
610 */
611 if (trigger == ACPI_LEVEL_SENSITIVE)
612 elcr_set_level_irq(gsi);
613#endif
614
615 return gsi;
616}
617
618#ifdef CONFIG_X86_LOCAL_APIC
619static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
620 int trigger, int polarity)
621{
622 int irq = gsi;
623#ifdef CONFIG_X86_IO_APIC
624 int node;
625 struct irq_alloc_info info;
626
627 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
628 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
629 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
630 ioapic_set_alloc_attr(&info, node, trigger, polarity);
631
632 mutex_lock(&acpi_ioapic_lock);
633 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
634 /* Don't set up the ACPI SCI because it's already set up */
635 if (irq >= 0 && enable_update_mptable &&
636 acpi_gbl_FADT.sci_interrupt != gsi)
637 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
638 mutex_unlock(&acpi_ioapic_lock);
639#endif
640
641 return irq;
642}
643
644static void acpi_unregister_gsi_ioapic(u32 gsi)
645{
646#ifdef CONFIG_X86_IO_APIC
647 int irq;
648
649 mutex_lock(&acpi_ioapic_lock);
650 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
651 if (irq > 0)
652 mp_unmap_irq(irq);
653 mutex_unlock(&acpi_ioapic_lock);
654#endif
655}
656#endif
657
658int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
659 int trigger, int polarity) = acpi_register_gsi_pic;
660void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
661
662#ifdef CONFIG_ACPI_SLEEP
663int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
664#else
665int (*acpi_suspend_lowlevel)(void);
666#endif
667
668/*
669 * success: return IRQ number (>=0)
670 * failure: return < 0
671 */
672int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
673{
674 return __acpi_register_gsi(dev, gsi, trigger, polarity);
675}
676EXPORT_SYMBOL_GPL(acpi_register_gsi);
677
678void acpi_unregister_gsi(u32 gsi)
679{
680 if (__acpi_unregister_gsi)
681 __acpi_unregister_gsi(gsi);
682}
683EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
684
685#ifdef CONFIG_X86_LOCAL_APIC
686static void __init acpi_set_irq_model_ioapic(void)
687{
688 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
689 __acpi_register_gsi = acpi_register_gsi_ioapic;
690 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
691 acpi_ioapic = 1;
692}
693#endif
694
695/*
696 * ACPI based hotplug support for CPU
697 */
698#ifdef CONFIG_ACPI_HOTPLUG_CPU
699#include <acpi/processor.h>
700
701static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
702{
703#ifdef CONFIG_ACPI_NUMA
704 int nid;
705
706 nid = acpi_get_node(handle);
707 if (nid != -1) {
708 set_apicid_to_node(physid, nid);
709 numa_set_node(cpu, nid);
710 }
711#endif
712}
713
714int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
715{
716 int cpu;
717
718 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
719 if (cpu < 0) {
720 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
721 return cpu;
722 }
723
724 acpi_processor_set_pdc(handle);
725 acpi_map_cpu2node(handle, cpu, physid);
726
727 *pcpu = cpu;
728 return 0;
729}
730EXPORT_SYMBOL(acpi_map_cpu);
731
732int acpi_unmap_cpu(int cpu)
733{
734#ifdef CONFIG_ACPI_NUMA
735 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
736#endif
737
738 per_cpu(x86_cpu_to_apicid, cpu) = -1;
739 set_cpu_present(cpu, false);
740 num_processors--;
741
742 return (0);
743}
744EXPORT_SYMBOL(acpi_unmap_cpu);
745#endif /* CONFIG_ACPI_HOTPLUG_CPU */
746
747int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
748{
749 int ret = -ENOSYS;
750#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
751 int ioapic_id;
752 u64 addr;
753 struct ioapic_domain_cfg cfg = {
754 .type = IOAPIC_DOMAIN_DYNAMIC,
755 .ops = &mp_ioapic_irqdomain_ops,
756 };
757
758 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
759 if (ioapic_id < 0) {
760 unsigned long long uid;
761 acpi_status status;
762
763 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
764 NULL, &uid);
765 if (ACPI_FAILURE(status)) {
766 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
767 return -EINVAL;
768 }
769 ioapic_id = (int)uid;
770 }
771
772 mutex_lock(&acpi_ioapic_lock);
773 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
774 mutex_unlock(&acpi_ioapic_lock);
775#endif
776
777 return ret;
778}
779EXPORT_SYMBOL(acpi_register_ioapic);
780
781int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
782{
783 int ret = -ENOSYS;
784
785#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
786 mutex_lock(&acpi_ioapic_lock);
787 ret = mp_unregister_ioapic(gsi_base);
788 mutex_unlock(&acpi_ioapic_lock);
789#endif
790
791 return ret;
792}
793EXPORT_SYMBOL(acpi_unregister_ioapic);
794
795/**
796 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
797 * has been registered
798 * @handle: ACPI handle of the IOAPIC deivce
799 * @gsi_base: GSI base associated with the IOAPIC
800 *
801 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
802 * with acpi_register_ioapic()/acpi_unregister_ioapic().
803 */
804int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
805{
806 int ret = 0;
807
808#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
809 mutex_lock(&acpi_ioapic_lock);
810 ret = mp_ioapic_registered(gsi_base);
811 mutex_unlock(&acpi_ioapic_lock);
812#endif
813
814 return ret;
815}
816
817static int __init acpi_parse_sbf(struct acpi_table_header *table)
818{
819 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
820
821 sbf_port = sb->cmos_index; /* Save CMOS port */
822
823 return 0;
824}
825
826#ifdef CONFIG_HPET_TIMER
827#include <asm/hpet.h>
828
829static struct resource *hpet_res __initdata;
830
831static int __init acpi_parse_hpet(struct acpi_table_header *table)
832{
833 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
834
835 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
836 printk(KERN_WARNING PREFIX "HPET timers must be located in "
837 "memory.\n");
838 return -1;
839 }
840
841 hpet_address = hpet_tbl->address.address;
842 hpet_blockid = hpet_tbl->sequence;
843
844 /*
845 * Some broken BIOSes advertise HPET at 0x0. We really do not
846 * want to allocate a resource there.
847 */
848 if (!hpet_address) {
849 printk(KERN_WARNING PREFIX
850 "HPET id: %#x base: %#lx is invalid\n",
851 hpet_tbl->id, hpet_address);
852 return 0;
853 }
854#ifdef CONFIG_X86_64
855 /*
856 * Some even more broken BIOSes advertise HPET at
857 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
858 * some noise:
859 */
860 if (hpet_address == 0xfed0000000000000UL) {
861 if (!hpet_force_user) {
862 printk(KERN_WARNING PREFIX "HPET id: %#x "
863 "base: 0xfed0000000000000 is bogus\n "
864 "try hpet=force on the kernel command line to "
865 "fix it up to 0xfed00000.\n", hpet_tbl->id);
866 hpet_address = 0;
867 return 0;
868 }
869 printk(KERN_WARNING PREFIX
870 "HPET id: %#x base: 0xfed0000000000000 fixed up "
871 "to 0xfed00000.\n", hpet_tbl->id);
872 hpet_address >>= 32;
873 }
874#endif
875 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
876 hpet_tbl->id, hpet_address);
877
878 /*
879 * Allocate and initialize the HPET firmware resource for adding into
880 * the resource tree during the lateinit timeframe.
881 */
882#define HPET_RESOURCE_NAME_SIZE 9
883 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
884
885 hpet_res->name = (void *)&hpet_res[1];
886 hpet_res->flags = IORESOURCE_MEM;
887 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
888 hpet_tbl->sequence);
889
890 hpet_res->start = hpet_address;
891 hpet_res->end = hpet_address + (1 * 1024) - 1;
892
893 return 0;
894}
895
896/*
897 * hpet_insert_resource inserts the HPET resources used into the resource
898 * tree.
899 */
900static __init int hpet_insert_resource(void)
901{
902 if (!hpet_res)
903 return 1;
904
905 return insert_resource(&iomem_resource, hpet_res);
906}
907
908late_initcall(hpet_insert_resource);
909
910#else
911#define acpi_parse_hpet NULL
912#endif
913
914static int __init acpi_parse_fadt(struct acpi_table_header *table)
915{
916
917#ifdef CONFIG_X86_PM_TIMER
918 /* detect the location of the ACPI PM Timer */
919 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
920 /* FADT rev. 2 */
921 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
922 ACPI_ADR_SPACE_SYSTEM_IO)
923 return 0;
924
925 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
926 /*
927 * "X" fields are optional extensions to the original V1.0
928 * fields, so we must selectively expand V1.0 fields if the
929 * corresponding X field is zero.
930 */
931 if (!pmtmr_ioport)
932 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
933 } else {
934 /* FADT rev. 1 */
935 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
936 }
937 if (pmtmr_ioport)
938 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
939 pmtmr_ioport);
940#endif
941 return 0;
942}
943
944#ifdef CONFIG_X86_LOCAL_APIC
945/*
946 * Parse LAPIC entries in MADT
947 * returns 0 on success, < 0 on error
948 */
949
950static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
951{
952 int count;
953
954 if (!cpu_has_apic)
955 return -ENODEV;
956
957 /*
958 * Note that the LAPIC address is obtained from the MADT (32-bit value)
959 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
960 */
961
962 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
963 acpi_parse_lapic_addr_ovr, 0);
964 if (count < 0) {
965 printk(KERN_ERR PREFIX
966 "Error parsing LAPIC address override entry\n");
967 return count;
968 }
969
970 register_lapic_address(acpi_lapic_addr);
971
972 return count;
973}
974
975static int __init acpi_parse_madt_lapic_entries(void)
976{
977 int count;
978 int x2count = 0;
979 int ret;
980 struct acpi_subtable_proc madt_proc[2];
981
982 if (!cpu_has_apic)
983 return -ENODEV;
984
985 /*
986 * Note that the LAPIC address is obtained from the MADT (32-bit value)
987 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
988 */
989
990 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
991 acpi_parse_lapic_addr_ovr, 0);
992 if (count < 0) {
993 printk(KERN_ERR PREFIX
994 "Error parsing LAPIC address override entry\n");
995 return count;
996 }
997
998 register_lapic_address(acpi_lapic_addr);
999
1000 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1001 acpi_parse_sapic, MAX_LOCAL_APIC);
1002
1003 if (!count) {
1004 memset(madt_proc, 0, sizeof(madt_proc));
1005 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1006 madt_proc[0].handler = acpi_parse_lapic;
1007 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1008 madt_proc[1].handler = acpi_parse_x2apic;
1009 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1010 sizeof(struct acpi_table_madt),
1011 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1012 if (ret < 0) {
1013 printk(KERN_ERR PREFIX
1014 "Error parsing LAPIC/X2APIC entries\n");
1015 return ret;
1016 }
1017
1018 x2count = madt_proc[0].count;
1019 count = madt_proc[1].count;
1020 }
1021 if (!count && !x2count) {
1022 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1023 /* TBD: Cleanup to allow fallback to MPS */
1024 return -ENODEV;
1025 } else if (count < 0 || x2count < 0) {
1026 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1027 /* TBD: Cleanup to allow fallback to MPS */
1028 return count;
1029 }
1030
1031 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1032 acpi_parse_x2apic_nmi, 0);
1033 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1034 acpi_parse_lapic_nmi, 0);
1035 if (count < 0 || x2count < 0) {
1036 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1037 /* TBD: Cleanup to allow fallback to MPS */
1038 return count;
1039 }
1040 return 0;
1041}
1042#endif /* CONFIG_X86_LOCAL_APIC */
1043
1044#ifdef CONFIG_X86_IO_APIC
1045static void __init mp_config_acpi_legacy_irqs(void)
1046{
1047 int i;
1048 struct mpc_intsrc mp_irq;
1049
1050#ifdef CONFIG_EISA
1051 /*
1052 * Fabricate the legacy ISA bus (bus #31).
1053 */
1054 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1055#endif
1056 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1057 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1058
1059 /*
1060 * Use the default configuration for the IRQs 0-15. Unless
1061 * overridden by (MADT) interrupt source override entries.
1062 */
1063 for (i = 0; i < nr_legacy_irqs(); i++) {
1064 int ioapic, pin;
1065 unsigned int dstapic;
1066 int idx;
1067 u32 gsi;
1068
1069 /* Locate the gsi that irq i maps to. */
1070 if (acpi_isa_irq_to_gsi(i, &gsi))
1071 continue;
1072
1073 /*
1074 * Locate the IOAPIC that manages the ISA IRQ.
1075 */
1076 ioapic = mp_find_ioapic(gsi);
1077 if (ioapic < 0)
1078 continue;
1079 pin = mp_find_ioapic_pin(ioapic, gsi);
1080 dstapic = mpc_ioapic_id(ioapic);
1081
1082 for (idx = 0; idx < mp_irq_entries; idx++) {
1083 struct mpc_intsrc *irq = mp_irqs + idx;
1084
1085 /* Do we already have a mapping for this ISA IRQ? */
1086 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1087 break;
1088
1089 /* Do we already have a mapping for this IOAPIC pin */
1090 if (irq->dstapic == dstapic && irq->dstirq == pin)
1091 break;
1092 }
1093
1094 if (idx != mp_irq_entries) {
1095 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1096 continue; /* IRQ already used */
1097 }
1098
1099 mp_irq.type = MP_INTSRC;
1100 mp_irq.irqflag = 0; /* Conforming */
1101 mp_irq.srcbus = MP_ISA_BUS;
1102 mp_irq.dstapic = dstapic;
1103 mp_irq.irqtype = mp_INT;
1104 mp_irq.srcbusirq = i; /* Identity mapped */
1105 mp_irq.dstirq = pin;
1106
1107 mp_save_irq(&mp_irq);
1108 }
1109}
1110
1111/*
1112 * Parse IOAPIC related entries in MADT
1113 * returns 0 on success, < 0 on error
1114 */
1115static int __init acpi_parse_madt_ioapic_entries(void)
1116{
1117 int count;
1118
1119 /*
1120 * ACPI interpreter is required to complete interrupt setup,
1121 * so if it is off, don't enumerate the io-apics with ACPI.
1122 * If MPS is present, it will handle them,
1123 * otherwise the system will stay in PIC mode
1124 */
1125 if (acpi_disabled || acpi_noirq)
1126 return -ENODEV;
1127
1128 if (!cpu_has_apic)
1129 return -ENODEV;
1130
1131 /*
1132 * if "noapic" boot option, don't look for IO-APICs
1133 */
1134 if (skip_ioapic_setup) {
1135 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1136 "due to 'noapic' option.\n");
1137 return -ENODEV;
1138 }
1139
1140 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1141 MAX_IO_APICS);
1142 if (!count) {
1143 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1144 return -ENODEV;
1145 } else if (count < 0) {
1146 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1147 return count;
1148 }
1149
1150 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1151 acpi_parse_int_src_ovr, nr_irqs);
1152 if (count < 0) {
1153 printk(KERN_ERR PREFIX
1154 "Error parsing interrupt source overrides entry\n");
1155 /* TBD: Cleanup to allow fallback to MPS */
1156 return count;
1157 }
1158
1159 /*
1160 * If BIOS did not supply an INT_SRC_OVR for the SCI
1161 * pretend we got one so we can set the SCI flags.
1162 */
1163 if (!acpi_sci_override_gsi)
1164 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1165 acpi_gbl_FADT.sci_interrupt);
1166
1167 /* Fill in identity legacy mappings where no override */
1168 mp_config_acpi_legacy_irqs();
1169
1170 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1171 acpi_parse_nmi_src, nr_irqs);
1172 if (count < 0) {
1173 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1174 /* TBD: Cleanup to allow fallback to MPS */
1175 return count;
1176 }
1177
1178 return 0;
1179}
1180#else
1181static inline int acpi_parse_madt_ioapic_entries(void)
1182{
1183 return -1;
1184}
1185#endif /* !CONFIG_X86_IO_APIC */
1186
1187static void __init early_acpi_process_madt(void)
1188{
1189#ifdef CONFIG_X86_LOCAL_APIC
1190 int error;
1191
1192 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1193
1194 /*
1195 * Parse MADT LAPIC entries
1196 */
1197 error = early_acpi_parse_madt_lapic_addr_ovr();
1198 if (!error) {
1199 acpi_lapic = 1;
1200 smp_found_config = 1;
1201 }
1202 if (error == -EINVAL) {
1203 /*
1204 * Dell Precision Workstation 410, 610 come here.
1205 */
1206 printk(KERN_ERR PREFIX
1207 "Invalid BIOS MADT, disabling ACPI\n");
1208 disable_acpi();
1209 }
1210 }
1211#endif
1212}
1213
1214static void __init acpi_process_madt(void)
1215{
1216#ifdef CONFIG_X86_LOCAL_APIC
1217 int error;
1218
1219 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1220
1221 /*
1222 * Parse MADT LAPIC entries
1223 */
1224 error = acpi_parse_madt_lapic_entries();
1225 if (!error) {
1226 acpi_lapic = 1;
1227
1228 /*
1229 * Parse MADT IO-APIC entries
1230 */
1231 mutex_lock(&acpi_ioapic_lock);
1232 error = acpi_parse_madt_ioapic_entries();
1233 mutex_unlock(&acpi_ioapic_lock);
1234 if (!error) {
1235 acpi_set_irq_model_ioapic();
1236
1237 smp_found_config = 1;
1238 }
1239 }
1240 if (error == -EINVAL) {
1241 /*
1242 * Dell Precision Workstation 410, 610 come here.
1243 */
1244 printk(KERN_ERR PREFIX
1245 "Invalid BIOS MADT, disabling ACPI\n");
1246 disable_acpi();
1247 }
1248 } else {
1249 /*
1250 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1251 * In the event an MPS table was found, forget it.
1252 * Boot with "acpi=off" to use MPS on such a system.
1253 */
1254 if (smp_found_config) {
1255 printk(KERN_WARNING PREFIX
1256 "No APIC-table, disabling MPS\n");
1257 smp_found_config = 0;
1258 }
1259 }
1260
1261 /*
1262 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1263 * processors, where MPS only supports physical.
1264 */
1265 if (acpi_lapic && acpi_ioapic)
1266 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1267 "information\n");
1268 else if (acpi_lapic)
1269 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1270 "configuration information\n");
1271#endif
1272 return;
1273}
1274
1275static int __init disable_acpi_irq(const struct dmi_system_id *d)
1276{
1277 if (!acpi_force) {
1278 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1279 d->ident);
1280 acpi_noirq_set();
1281 }
1282 return 0;
1283}
1284
1285static int __init disable_acpi_pci(const struct dmi_system_id *d)
1286{
1287 if (!acpi_force) {
1288 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1289 d->ident);
1290 acpi_disable_pci();
1291 }
1292 return 0;
1293}
1294
1295static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1296{
1297 if (!acpi_force) {
1298 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1299 disable_acpi();
1300 } else {
1301 printk(KERN_NOTICE
1302 "Warning: DMI blacklist says broken, but acpi forced\n");
1303 }
1304 return 0;
1305}
1306
1307/*
1308 * Force ignoring BIOS IRQ0 override
1309 */
1310static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1311{
1312 if (!acpi_skip_timer_override) {
1313 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1314 d->ident);
1315 acpi_skip_timer_override = 1;
1316 }
1317 return 0;
1318}
1319
1320/*
1321 * ACPI offers an alternative platform interface model that removes
1322 * ACPI hardware requirements for platforms that do not implement
1323 * the PC Architecture.
1324 *
1325 * We initialize the Hardware-reduced ACPI model here:
1326 */
1327static void __init acpi_reduced_hw_init(void)
1328{
1329 if (acpi_gbl_reduced_hardware) {
1330 /*
1331 * Override x86_init functions and bypass legacy pic
1332 * in Hardware-reduced ACPI mode
1333 */
1334 x86_init.timers.timer_init = x86_init_noop;
1335 x86_init.irqs.pre_vector_init = x86_init_noop;
1336 legacy_pic = &null_legacy_pic;
1337 }
1338}
1339
1340/*
1341 * If your system is blacklisted here, but you find that acpi=force
1342 * works for you, please contact linux-acpi@vger.kernel.org
1343 */
1344static struct dmi_system_id __initdata acpi_dmi_table[] = {
1345 /*
1346 * Boxes that need ACPI disabled
1347 */
1348 {
1349 .callback = dmi_disable_acpi,
1350 .ident = "IBM Thinkpad",
1351 .matches = {
1352 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1353 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1354 },
1355 },
1356
1357 /*
1358 * Boxes that need ACPI PCI IRQ routing disabled
1359 */
1360 {
1361 .callback = disable_acpi_irq,
1362 .ident = "ASUS A7V",
1363 .matches = {
1364 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1365 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1366 /* newer BIOS, Revision 1011, does work */
1367 DMI_MATCH(DMI_BIOS_VERSION,
1368 "ASUS A7V ACPI BIOS Revision 1007"),
1369 },
1370 },
1371 {
1372 /*
1373 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1374 * for LPC bridge, which is needed for the PCI
1375 * interrupt links to work. DSDT fix is in bug 5966.
1376 * 2645, 2646 model numbers are shared with 600/600E/600X
1377 */
1378 .callback = disable_acpi_irq,
1379 .ident = "IBM Thinkpad 600 Series 2645",
1380 .matches = {
1381 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1382 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1383 },
1384 },
1385 {
1386 .callback = disable_acpi_irq,
1387 .ident = "IBM Thinkpad 600 Series 2646",
1388 .matches = {
1389 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1390 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1391 },
1392 },
1393 /*
1394 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1395 */
1396 { /* _BBN 0 bug */
1397 .callback = disable_acpi_pci,
1398 .ident = "ASUS PR-DLS",
1399 .matches = {
1400 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1401 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1402 DMI_MATCH(DMI_BIOS_VERSION,
1403 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1404 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1405 },
1406 },
1407 {
1408 .callback = disable_acpi_pci,
1409 .ident = "Acer TravelMate 36x Laptop",
1410 .matches = {
1411 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1412 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1413 },
1414 },
1415 {}
1416};
1417
1418/* second table for DMI checks that should run after early-quirks */
1419static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1420 /*
1421 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1422 * which includes some code which overrides all temperature
1423 * trip points to 16C if the INTIN2 input of the I/O APIC
1424 * is enabled. This input is incorrectly designated the
1425 * ISA IRQ 0 via an interrupt source override even though
1426 * it is wired to the output of the master 8259A and INTIN0
1427 * is not connected at all. Force ignoring BIOS IRQ0
1428 * override in that cases.
1429 */
1430 {
1431 .callback = dmi_ignore_irq0_timer_override,
1432 .ident = "HP nx6115 laptop",
1433 .matches = {
1434 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1435 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1436 },
1437 },
1438 {
1439 .callback = dmi_ignore_irq0_timer_override,
1440 .ident = "HP NX6125 laptop",
1441 .matches = {
1442 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1443 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1444 },
1445 },
1446 {
1447 .callback = dmi_ignore_irq0_timer_override,
1448 .ident = "HP NX6325 laptop",
1449 .matches = {
1450 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1451 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1452 },
1453 },
1454 {
1455 .callback = dmi_ignore_irq0_timer_override,
1456 .ident = "HP 6715b laptop",
1457 .matches = {
1458 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1459 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1460 },
1461 },
1462 {
1463 .callback = dmi_ignore_irq0_timer_override,
1464 .ident = "FUJITSU SIEMENS",
1465 .matches = {
1466 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1467 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1468 },
1469 },
1470 {}
1471};
1472
1473/*
1474 * acpi_boot_table_init() and acpi_boot_init()
1475 * called from setup_arch(), always.
1476 * 1. checksums all tables
1477 * 2. enumerates lapics
1478 * 3. enumerates io-apics
1479 *
1480 * acpi_table_init() is separate to allow reading SRAT without
1481 * other side effects.
1482 *
1483 * side effects of acpi_boot_init:
1484 * acpi_lapic = 1 if LAPIC found
1485 * acpi_ioapic = 1 if IOAPIC found
1486 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1487 * if acpi_blacklisted() acpi_disabled = 1;
1488 * acpi_irq_model=...
1489 * ...
1490 */
1491
1492void __init acpi_boot_table_init(void)
1493{
1494 dmi_check_system(acpi_dmi_table);
1495
1496 /*
1497 * If acpi_disabled, bail out
1498 */
1499 if (acpi_disabled)
1500 return;
1501
1502 /*
1503 * Initialize the ACPI boot-time table parser.
1504 */
1505 if (acpi_table_init()) {
1506 disable_acpi();
1507 return;
1508 }
1509
1510 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1511
1512 /*
1513 * blacklist may disable ACPI entirely
1514 */
1515 if (acpi_blacklisted()) {
1516 if (acpi_force) {
1517 printk(KERN_WARNING PREFIX "acpi=force override\n");
1518 } else {
1519 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1520 disable_acpi();
1521 return;
1522 }
1523 }
1524}
1525
1526int __init early_acpi_boot_init(void)
1527{
1528 /*
1529 * If acpi_disabled, bail out
1530 */
1531 if (acpi_disabled)
1532 return 1;
1533
1534 /*
1535 * Process the Multiple APIC Description Table (MADT), if present
1536 */
1537 early_acpi_process_madt();
1538
1539 /*
1540 * Hardware-reduced ACPI mode initialization:
1541 */
1542 acpi_reduced_hw_init();
1543
1544 return 0;
1545}
1546
1547int __init acpi_boot_init(void)
1548{
1549 /* those are executed after early-quirks are executed */
1550 dmi_check_system(acpi_dmi_table_late);
1551
1552 /*
1553 * If acpi_disabled, bail out
1554 */
1555 if (acpi_disabled)
1556 return 1;
1557
1558 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1559
1560 /*
1561 * set sci_int and PM timer address
1562 */
1563 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1564
1565 /*
1566 * Process the Multiple APIC Description Table (MADT), if present
1567 */
1568 acpi_process_madt();
1569
1570 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1571
1572 if (!acpi_noirq)
1573 x86_init.pci.init = pci_acpi_init;
1574
1575 return 0;
1576}
1577
1578static int __init parse_acpi(char *arg)
1579{
1580 if (!arg)
1581 return -EINVAL;
1582
1583 /* "acpi=off" disables both ACPI table parsing and interpreter */
1584 if (strcmp(arg, "off") == 0) {
1585 disable_acpi();
1586 }
1587 /* acpi=force to over-ride black-list */
1588 else if (strcmp(arg, "force") == 0) {
1589 acpi_force = 1;
1590 acpi_disabled = 0;
1591 }
1592 /* acpi=strict disables out-of-spec workarounds */
1593 else if (strcmp(arg, "strict") == 0) {
1594 acpi_strict = 1;
1595 }
1596 /* acpi=rsdt use RSDT instead of XSDT */
1597 else if (strcmp(arg, "rsdt") == 0) {
1598 acpi_gbl_do_not_use_xsdt = TRUE;
1599 }
1600 /* "acpi=noirq" disables ACPI interrupt routing */
1601 else if (strcmp(arg, "noirq") == 0) {
1602 acpi_noirq_set();
1603 }
1604 /* "acpi=copy_dsdt" copys DSDT */
1605 else if (strcmp(arg, "copy_dsdt") == 0) {
1606 acpi_gbl_copy_dsdt_locally = 1;
1607 }
1608 /* "acpi=nocmcff" disables FF mode for corrected errors */
1609 else if (strcmp(arg, "nocmcff") == 0) {
1610 acpi_disable_cmcff = 1;
1611 } else {
1612 /* Core will printk when we return error. */
1613 return -EINVAL;
1614 }
1615 return 0;
1616}
1617early_param("acpi", parse_acpi);
1618
1619/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1620static int __init parse_pci(char *arg)
1621{
1622 if (arg && strcmp(arg, "noacpi") == 0)
1623 acpi_disable_pci();
1624 return 0;
1625}
1626early_param("pci", parse_pci);
1627
1628int __init acpi_mps_check(void)
1629{
1630#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1631/* mptable code is not built-in*/
1632 if (acpi_disabled || acpi_noirq) {
1633 printk(KERN_WARNING "MPS support code is not built-in.\n"
1634 "Using acpi=off or acpi=noirq or pci=noacpi "
1635 "may have problem\n");
1636 return 1;
1637 }
1638#endif
1639 return 0;
1640}
1641
1642#ifdef CONFIG_X86_IO_APIC
1643static int __init parse_acpi_skip_timer_override(char *arg)
1644{
1645 acpi_skip_timer_override = 1;
1646 return 0;
1647}
1648early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1649
1650static int __init parse_acpi_use_timer_override(char *arg)
1651{
1652 acpi_use_timer_override = 1;
1653 return 0;
1654}
1655early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1656#endif /* CONFIG_X86_IO_APIC */
1657
1658static int __init setup_acpi_sci(char *s)
1659{
1660 if (!s)
1661 return -EINVAL;
1662 if (!strcmp(s, "edge"))
1663 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1664 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1665 else if (!strcmp(s, "level"))
1666 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1667 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1668 else if (!strcmp(s, "high"))
1669 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1670 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1671 else if (!strcmp(s, "low"))
1672 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1673 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1674 else
1675 return -EINVAL;
1676 return 0;
1677}
1678early_param("acpi_sci", setup_acpi_sci);
1679
1680int __acpi_acquire_global_lock(unsigned int *lock)
1681{
1682 unsigned int old, new, val;
1683 do {
1684 old = *lock;
1685 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1686 val = cmpxchg(lock, old, new);
1687 } while (unlikely (val != old));
1688 return (new < 3) ? -1 : 0;
1689}
1690
1691int __acpi_release_global_lock(unsigned int *lock)
1692{
1693 unsigned int old, new, val;
1694 do {
1695 old = *lock;
1696 new = old & ~0x3;
1697 val = cmpxchg(lock, old, new);
1698 } while (unlikely (val != old));
1699 return old & 0x1;
1700}
1701
1702void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1703{
1704 e820_add_region(addr, size, E820_ACPI);
1705 update_e820();
1706}
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#include <linux/pgtable.h>
24
25#include <asm/e820/api.h>
26#include <asm/irqdomain.h>
27#include <asm/pci_x86.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 */
48static int acpi_nobgrt; /* skip ACPI BGRT */
49int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
50EXPORT_SYMBOL(acpi_pci_disabled);
51
52int acpi_lapic;
53int acpi_ioapic;
54int acpi_strict;
55int acpi_disable_cmcff;
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;
66#endif
67
68#ifdef CONFIG_X86_IO_APIC
69/*
70 * Locks related to IOAPIC hotplug
71 * Hotplug side:
72 * ->device_hotplug_lock
73 * ->acpi_ioapic_lock
74 * ->ioapic_lock
75 * Interrupt mapping side:
76 * ->acpi_ioapic_lock
77 * ->ioapic_mutex
78 * ->ioapic_lock
79 */
80static DEFINE_MUTEX(acpi_ioapic_lock);
81#endif
82
83/* --------------------------------------------------------------------------
84 Boot-time Configuration
85 -------------------------------------------------------------------------- */
86
87/*
88 * The default interrupt routing model is PIC (8259). This gets
89 * overridden if IOAPICs are enumerated (below).
90 */
91enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
92
93
94/*
95 * ISA irqs by default are the first 16 gsis but can be
96 * any gsi as specified by an interrupt source override.
97 */
98static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
99 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
100};
101
102/*
103 * This is just a simple wrapper around early_memremap(),
104 * with sanity checks for phys == 0 and size == 0.
105 */
106void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
107{
108
109 if (!phys || !size)
110 return NULL;
111
112 return early_memremap(phys, size);
113}
114
115void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
116{
117 if (!map || !size)
118 return;
119
120 early_memunmap(map, size);
121}
122
123#ifdef CONFIG_X86_LOCAL_APIC
124static int __init acpi_parse_madt(struct acpi_table_header *table)
125{
126 struct acpi_table_madt *madt = NULL;
127
128 if (!boot_cpu_has(X86_FEATURE_APIC))
129 return -EINVAL;
130
131 madt = (struct acpi_table_madt *)table;
132 if (!madt) {
133 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
134 return -ENODEV;
135 }
136
137 if (madt->address) {
138 acpi_lapic_addr = (u64) madt->address;
139
140 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
141 madt->address);
142 }
143
144 default_acpi_madt_oem_check(madt->header.oem_id,
145 madt->header.oem_table_id);
146
147 return 0;
148}
149
150/**
151 * acpi_register_lapic - register a local apic and generates a logic cpu number
152 * @id: local apic id to register
153 * @acpiid: ACPI id to register
154 * @enabled: this cpu is enabled or not
155 *
156 * Returns the logic cpu number which maps to the local apic
157 */
158static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
159{
160 unsigned int ver = 0;
161 int cpu;
162
163 if (id >= MAX_LOCAL_APIC) {
164 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
165 return -EINVAL;
166 }
167
168 if (!enabled) {
169 ++disabled_cpus;
170 return -EINVAL;
171 }
172
173 if (boot_cpu_physical_apicid != -1U)
174 ver = boot_cpu_apic_version;
175
176 cpu = generic_processor_info(id, ver);
177 if (cpu >= 0)
178 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
179
180 return cpu;
181}
182
183static int __init
184acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
185{
186 struct acpi_madt_local_x2apic *processor = NULL;
187#ifdef CONFIG_X86_X2APIC
188 u32 apic_id;
189 u8 enabled;
190#endif
191
192 processor = (struct acpi_madt_local_x2apic *)header;
193
194 if (BAD_MADT_ENTRY(processor, end))
195 return -EINVAL;
196
197 acpi_table_print_madt_entry(&header->common);
198
199#ifdef CONFIG_X86_X2APIC
200 apic_id = processor->local_apic_id;
201 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
202
203 /* Ignore invalid ID */
204 if (apic_id == 0xffffffff)
205 return 0;
206
207 /*
208 * We need to register disabled CPU as well to permit
209 * counting disabled CPUs. This allows us to size
210 * cpus_possible_map more accurately, to permit
211 * to not preallocating memory for all NR_CPUS
212 * when we use CPU hotplug.
213 */
214 if (!apic->apic_id_valid(apic_id)) {
215 if (enabled)
216 pr_warn(PREFIX "x2apic entry ignored\n");
217 return 0;
218 }
219
220 acpi_register_lapic(apic_id, processor->uid, enabled);
221#else
222 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
223#endif
224
225 return 0;
226}
227
228static int __init
229acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
230{
231 struct acpi_madt_local_apic *processor = NULL;
232
233 processor = (struct acpi_madt_local_apic *)header;
234
235 if (BAD_MADT_ENTRY(processor, end))
236 return -EINVAL;
237
238 acpi_table_print_madt_entry(&header->common);
239
240 /* Ignore invalid ID */
241 if (processor->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 acpi_register_lapic(processor->id, /* APIC ID */
252 processor->processor_id, /* ACPI ID */
253 processor->lapic_flags & ACPI_MADT_ENABLED);
254
255 return 0;
256}
257
258static int __init
259acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
260{
261 struct acpi_madt_local_sapic *processor = NULL;
262
263 processor = (struct acpi_madt_local_sapic *)header;
264
265 if (BAD_MADT_ENTRY(processor, end))
266 return -EINVAL;
267
268 acpi_table_print_madt_entry(&header->common);
269
270 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
271 processor->processor_id, /* ACPI ID */
272 processor->lapic_flags & ACPI_MADT_ENABLED);
273
274 return 0;
275}
276
277static int __init
278acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
279 const unsigned long end)
280{
281 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
282
283 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
284
285 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
286 return -EINVAL;
287
288 acpi_table_print_madt_entry(&header->common);
289
290 acpi_lapic_addr = lapic_addr_ovr->address;
291
292 return 0;
293}
294
295static int __init
296acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
297 const unsigned long end)
298{
299 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
300
301 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
302
303 if (BAD_MADT_ENTRY(x2apic_nmi, end))
304 return -EINVAL;
305
306 acpi_table_print_madt_entry(&header->common);
307
308 if (x2apic_nmi->lint != 1)
309 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
310
311 return 0;
312}
313
314static int __init
315acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
316{
317 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
318
319 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
320
321 if (BAD_MADT_ENTRY(lapic_nmi, end))
322 return -EINVAL;
323
324 acpi_table_print_madt_entry(&header->common);
325
326 if (lapic_nmi->lint != 1)
327 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
328
329 return 0;
330}
331
332#endif /*CONFIG_X86_LOCAL_APIC */
333
334#ifdef CONFIG_X86_IO_APIC
335#define MP_ISA_BUS 0
336
337static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
338 u8 trigger, u32 gsi);
339
340static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
341 u32 gsi)
342{
343 /*
344 * Check bus_irq boundary.
345 */
346 if (bus_irq >= NR_IRQS_LEGACY) {
347 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
348 return;
349 }
350
351 /*
352 * TBD: This check is for faulty timer entries, where the override
353 * erroneously sets the trigger to level, resulting in a HUGE
354 * increase of timer interrupts!
355 */
356 if ((bus_irq == 0) && (trigger == 3))
357 trigger = 1;
358
359 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
360 return;
361 /*
362 * Reset default identity mapping if gsi is also an legacy IRQ,
363 * otherwise there will be more than one entry with the same GSI
364 * and acpi_isa_irq_to_gsi() may give wrong result.
365 */
366 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
367 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
368 isa_irq_to_gsi[bus_irq] = gsi;
369}
370
371static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
372 int polarity)
373{
374#ifdef CONFIG_X86_MPPARSE
375 struct mpc_intsrc mp_irq;
376 struct pci_dev *pdev;
377 unsigned char number;
378 unsigned int devfn;
379 int ioapic;
380 u8 pin;
381
382 if (!acpi_ioapic)
383 return 0;
384 if (!dev || !dev_is_pci(dev))
385 return 0;
386
387 pdev = to_pci_dev(dev);
388 number = pdev->bus->number;
389 devfn = pdev->devfn;
390 pin = pdev->pin;
391 /* print the entry should happen on mptable identically */
392 mp_irq.type = MP_INTSRC;
393 mp_irq.irqtype = mp_INT;
394 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
395 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
396 mp_irq.srcbus = number;
397 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
398 ioapic = mp_find_ioapic(gsi);
399 mp_irq.dstapic = mpc_ioapic_id(ioapic);
400 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
401
402 mp_save_irq(&mp_irq);
403#endif
404 return 0;
405}
406
407static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
408 u8 trigger, u32 gsi)
409{
410 struct mpc_intsrc mp_irq;
411 int ioapic, pin;
412
413 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
414 ioapic = mp_find_ioapic(gsi);
415 if (ioapic < 0) {
416 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
417 return ioapic;
418 }
419
420 pin = mp_find_ioapic_pin(ioapic, gsi);
421
422 mp_irq.type = MP_INTSRC;
423 mp_irq.irqtype = mp_INT;
424 mp_irq.irqflag = (trigger << 2) | polarity;
425 mp_irq.srcbus = MP_ISA_BUS;
426 mp_irq.srcbusirq = bus_irq;
427 mp_irq.dstapic = mpc_ioapic_id(ioapic);
428 mp_irq.dstirq = pin;
429
430 mp_save_irq(&mp_irq);
431
432 return 0;
433}
434
435static int __init
436acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
437{
438 struct acpi_madt_io_apic *ioapic = NULL;
439 struct ioapic_domain_cfg cfg = {
440 .type = IOAPIC_DOMAIN_DYNAMIC,
441 .ops = &mp_ioapic_irqdomain_ops,
442 };
443
444 ioapic = (struct acpi_madt_io_apic *)header;
445
446 if (BAD_MADT_ENTRY(ioapic, end))
447 return -EINVAL;
448
449 acpi_table_print_madt_entry(&header->common);
450
451 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
452 if (ioapic->global_irq_base < nr_legacy_irqs())
453 cfg.type = IOAPIC_DOMAIN_LEGACY;
454
455 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
456 &cfg);
457
458 return 0;
459}
460
461/*
462 * Parse Interrupt Source Override for the ACPI SCI
463 */
464static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
465{
466 if (trigger == 0) /* compatible SCI trigger is level */
467 trigger = 3;
468
469 if (polarity == 0) /* compatible SCI polarity is low */
470 polarity = 3;
471
472 /* Command-line over-ride via acpi_sci= */
473 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
474 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
475
476 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
477 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
478
479 if (bus_irq < NR_IRQS_LEGACY)
480 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
481 else
482 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
483
484 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
485
486 /*
487 * stash over-ride to indicate we've been here
488 * and for later update of acpi_gbl_FADT
489 */
490 acpi_sci_override_gsi = gsi;
491 return;
492}
493
494static int __init
495acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
496 const unsigned long end)
497{
498 struct acpi_madt_interrupt_override *intsrc = NULL;
499
500 intsrc = (struct acpi_madt_interrupt_override *)header;
501
502 if (BAD_MADT_ENTRY(intsrc, end))
503 return -EINVAL;
504
505 acpi_table_print_madt_entry(&header->common);
506
507 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
508 acpi_sci_ioapic_setup(intsrc->source_irq,
509 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
510 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
511 intsrc->global_irq);
512 return 0;
513 }
514
515 if (intsrc->source_irq == 0) {
516 if (acpi_skip_timer_override) {
517 printk(PREFIX "BIOS IRQ0 override ignored.\n");
518 return 0;
519 }
520
521 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
522 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
523 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
524 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
525 }
526 }
527
528 mp_override_legacy_irq(intsrc->source_irq,
529 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
530 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
531 intsrc->global_irq);
532
533 return 0;
534}
535
536static int __init
537acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
538{
539 struct acpi_madt_nmi_source *nmi_src = NULL;
540
541 nmi_src = (struct acpi_madt_nmi_source *)header;
542
543 if (BAD_MADT_ENTRY(nmi_src, end))
544 return -EINVAL;
545
546 acpi_table_print_madt_entry(&header->common);
547
548 /* TBD: Support nimsrc entries? */
549
550 return 0;
551}
552
553#endif /* CONFIG_X86_IO_APIC */
554
555/*
556 * acpi_pic_sci_set_trigger()
557 *
558 * use ELCR to set PIC-mode trigger type for SCI
559 *
560 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
561 * it may require Edge Trigger -- use "acpi_sci=edge"
562 *
563 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
564 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
565 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
566 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
567 */
568
569void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
570{
571 unsigned int mask = 1 << irq;
572 unsigned int old, new;
573
574 /* Real old ELCR mask */
575 old = inb(0x4d0) | (inb(0x4d1) << 8);
576
577 /*
578 * If we use ACPI to set PCI IRQs, then we should clear ELCR
579 * since we will set it correctly as we enable the PCI irq
580 * routing.
581 */
582 new = acpi_noirq ? old : 0;
583
584 /*
585 * Update SCI information in the ELCR, it isn't in the PCI
586 * routing tables..
587 */
588 switch (trigger) {
589 case 1: /* Edge - clear */
590 new &= ~mask;
591 break;
592 case 3: /* Level - set */
593 new |= mask;
594 break;
595 }
596
597 if (old == new)
598 return;
599
600 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
601 outb(new, 0x4d0);
602 outb(new >> 8, 0x4d1);
603}
604
605int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
606{
607 int rc, irq, trigger, polarity;
608
609 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
610 *irqp = gsi;
611 return 0;
612 }
613
614 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
615 if (rc)
616 return rc;
617
618 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
619 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
620 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
621 if (irq < 0)
622 return irq;
623
624 *irqp = irq;
625 return 0;
626}
627EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
628
629int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
630{
631 if (isa_irq < nr_legacy_irqs() &&
632 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
633 *gsi = isa_irq_to_gsi[isa_irq];
634 return 0;
635 }
636
637 return -1;
638}
639
640static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
641 int trigger, int polarity)
642{
643#ifdef CONFIG_PCI
644 /*
645 * Make sure all (legacy) PCI IRQs are set as level-triggered.
646 */
647 if (trigger == ACPI_LEVEL_SENSITIVE)
648 elcr_set_level_irq(gsi);
649#endif
650
651 return gsi;
652}
653
654#ifdef CONFIG_X86_LOCAL_APIC
655static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
656 int trigger, int polarity)
657{
658 int irq = gsi;
659#ifdef CONFIG_X86_IO_APIC
660 int node;
661 struct irq_alloc_info info;
662
663 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
664 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
665 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
666 ioapic_set_alloc_attr(&info, node, trigger, polarity);
667
668 mutex_lock(&acpi_ioapic_lock);
669 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
670 /* Don't set up the ACPI SCI because it's already set up */
671 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
672 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
673 mutex_unlock(&acpi_ioapic_lock);
674#endif
675
676 return irq;
677}
678
679static void acpi_unregister_gsi_ioapic(u32 gsi)
680{
681#ifdef CONFIG_X86_IO_APIC
682 int irq;
683
684 mutex_lock(&acpi_ioapic_lock);
685 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
686 if (irq > 0)
687 mp_unmap_irq(irq);
688 mutex_unlock(&acpi_ioapic_lock);
689#endif
690}
691#endif
692
693int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
694 int trigger, int polarity) = acpi_register_gsi_pic;
695void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
696
697#ifdef CONFIG_ACPI_SLEEP
698int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
699#else
700int (*acpi_suspend_lowlevel)(void);
701#endif
702
703/*
704 * success: return IRQ number (>=0)
705 * failure: return < 0
706 */
707int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
708{
709 return __acpi_register_gsi(dev, gsi, trigger, polarity);
710}
711EXPORT_SYMBOL_GPL(acpi_register_gsi);
712
713void acpi_unregister_gsi(u32 gsi)
714{
715 if (__acpi_unregister_gsi)
716 __acpi_unregister_gsi(gsi);
717}
718EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
719
720#ifdef CONFIG_X86_LOCAL_APIC
721static void __init acpi_set_irq_model_ioapic(void)
722{
723 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
724 __acpi_register_gsi = acpi_register_gsi_ioapic;
725 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
726 acpi_ioapic = 1;
727}
728#endif
729
730/*
731 * ACPI based hotplug support for CPU
732 */
733#ifdef CONFIG_ACPI_HOTPLUG_CPU
734#include <acpi/processor.h>
735
736static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
737{
738#ifdef CONFIG_ACPI_NUMA
739 int nid;
740
741 nid = acpi_get_node(handle);
742 if (nid != NUMA_NO_NODE) {
743 set_apicid_to_node(physid, nid);
744 numa_set_node(cpu, nid);
745 }
746#endif
747 return 0;
748}
749
750int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
751 int *pcpu)
752{
753 int cpu;
754
755 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
756 if (cpu < 0) {
757 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
758 return cpu;
759 }
760
761 acpi_processor_set_pdc(handle);
762 acpi_map_cpu2node(handle, cpu, physid);
763
764 *pcpu = cpu;
765 return 0;
766}
767EXPORT_SYMBOL(acpi_map_cpu);
768
769int acpi_unmap_cpu(int cpu)
770{
771#ifdef CONFIG_ACPI_NUMA
772 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
773#endif
774
775 per_cpu(x86_cpu_to_apicid, cpu) = -1;
776 set_cpu_present(cpu, false);
777 num_processors--;
778
779 return (0);
780}
781EXPORT_SYMBOL(acpi_unmap_cpu);
782#endif /* CONFIG_ACPI_HOTPLUG_CPU */
783
784int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
785{
786 int ret = -ENOSYS;
787#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
788 int ioapic_id;
789 u64 addr;
790 struct ioapic_domain_cfg cfg = {
791 .type = IOAPIC_DOMAIN_DYNAMIC,
792 .ops = &mp_ioapic_irqdomain_ops,
793 };
794
795 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
796 if (ioapic_id < 0) {
797 unsigned long long uid;
798 acpi_status status;
799
800 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
801 NULL, &uid);
802 if (ACPI_FAILURE(status)) {
803 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
804 return -EINVAL;
805 }
806 ioapic_id = (int)uid;
807 }
808
809 mutex_lock(&acpi_ioapic_lock);
810 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
811 mutex_unlock(&acpi_ioapic_lock);
812#endif
813
814 return ret;
815}
816EXPORT_SYMBOL(acpi_register_ioapic);
817
818int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
819{
820 int ret = -ENOSYS;
821
822#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
823 mutex_lock(&acpi_ioapic_lock);
824 ret = mp_unregister_ioapic(gsi_base);
825 mutex_unlock(&acpi_ioapic_lock);
826#endif
827
828 return ret;
829}
830EXPORT_SYMBOL(acpi_unregister_ioapic);
831
832/**
833 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
834 * has been registered
835 * @handle: ACPI handle of the IOAPIC device
836 * @gsi_base: GSI base associated with the IOAPIC
837 *
838 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
839 * with acpi_register_ioapic()/acpi_unregister_ioapic().
840 */
841int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
842{
843 int ret = 0;
844
845#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
846 mutex_lock(&acpi_ioapic_lock);
847 ret = mp_ioapic_registered(gsi_base);
848 mutex_unlock(&acpi_ioapic_lock);
849#endif
850
851 return ret;
852}
853
854static int __init acpi_parse_sbf(struct acpi_table_header *table)
855{
856 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
857
858 sbf_port = sb->cmos_index; /* Save CMOS port */
859
860 return 0;
861}
862
863#ifdef CONFIG_HPET_TIMER
864#include <asm/hpet.h>
865
866static struct resource *hpet_res __initdata;
867
868static int __init acpi_parse_hpet(struct acpi_table_header *table)
869{
870 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
871
872 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
873 printk(KERN_WARNING PREFIX "HPET timers must be located in "
874 "memory.\n");
875 return -1;
876 }
877
878 hpet_address = hpet_tbl->address.address;
879 hpet_blockid = hpet_tbl->sequence;
880
881 /*
882 * Some broken BIOSes advertise HPET at 0x0. We really do not
883 * want to allocate a resource there.
884 */
885 if (!hpet_address) {
886 printk(KERN_WARNING PREFIX
887 "HPET id: %#x base: %#lx is invalid\n",
888 hpet_tbl->id, hpet_address);
889 return 0;
890 }
891#ifdef CONFIG_X86_64
892 /*
893 * Some even more broken BIOSes advertise HPET at
894 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
895 * some noise:
896 */
897 if (hpet_address == 0xfed0000000000000UL) {
898 if (!hpet_force_user) {
899 printk(KERN_WARNING PREFIX "HPET id: %#x "
900 "base: 0xfed0000000000000 is bogus\n "
901 "try hpet=force on the kernel command line to "
902 "fix it up to 0xfed00000.\n", hpet_tbl->id);
903 hpet_address = 0;
904 return 0;
905 }
906 printk(KERN_WARNING PREFIX
907 "HPET id: %#x base: 0xfed0000000000000 fixed up "
908 "to 0xfed00000.\n", hpet_tbl->id);
909 hpet_address >>= 32;
910 }
911#endif
912 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
913 hpet_tbl->id, hpet_address);
914
915 /*
916 * Allocate and initialize the HPET firmware resource for adding into
917 * the resource tree during the lateinit timeframe.
918 */
919#define HPET_RESOURCE_NAME_SIZE 9
920 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
921 SMP_CACHE_BYTES);
922 if (!hpet_res)
923 panic("%s: Failed to allocate %zu bytes\n", __func__,
924 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
925
926 hpet_res->name = (void *)&hpet_res[1];
927 hpet_res->flags = IORESOURCE_MEM;
928 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
929 hpet_tbl->sequence);
930
931 hpet_res->start = hpet_address;
932 hpet_res->end = hpet_address + (1 * 1024) - 1;
933
934 return 0;
935}
936
937/*
938 * hpet_insert_resource inserts the HPET resources used into the resource
939 * tree.
940 */
941static __init int hpet_insert_resource(void)
942{
943 if (!hpet_res)
944 return 1;
945
946 return insert_resource(&iomem_resource, hpet_res);
947}
948
949late_initcall(hpet_insert_resource);
950
951#else
952#define acpi_parse_hpet NULL
953#endif
954
955static int __init acpi_parse_fadt(struct acpi_table_header *table)
956{
957 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
958 pr_debug("ACPI: no legacy devices present\n");
959 x86_platform.legacy.devices.pnpbios = 0;
960 }
961
962 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
963 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
964 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
965 pr_debug("ACPI: i8042 controller is absent\n");
966 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
967 }
968
969 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
970 pr_debug("ACPI: not registering RTC platform device\n");
971 x86_platform.legacy.rtc = 0;
972 }
973
974 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
975 pr_debug("ACPI: probing for VGA not safe\n");
976 x86_platform.legacy.no_vga = 1;
977 }
978
979#ifdef CONFIG_X86_PM_TIMER
980 /* detect the location of the ACPI PM Timer */
981 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
982 /* FADT rev. 2 */
983 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
984 ACPI_ADR_SPACE_SYSTEM_IO)
985 return 0;
986
987 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
988 /*
989 * "X" fields are optional extensions to the original V1.0
990 * fields, so we must selectively expand V1.0 fields if the
991 * corresponding X field is zero.
992 */
993 if (!pmtmr_ioport)
994 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
995 } else {
996 /* FADT rev. 1 */
997 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
998 }
999 if (pmtmr_ioport)
1000 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1001 pmtmr_ioport);
1002#endif
1003 return 0;
1004}
1005
1006#ifdef CONFIG_X86_LOCAL_APIC
1007/*
1008 * Parse LAPIC entries in MADT
1009 * returns 0 on success, < 0 on error
1010 */
1011
1012static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1013{
1014 int count;
1015
1016 if (!boot_cpu_has(X86_FEATURE_APIC))
1017 return -ENODEV;
1018
1019 /*
1020 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1021 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1022 */
1023
1024 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1025 acpi_parse_lapic_addr_ovr, 0);
1026 if (count < 0) {
1027 printk(KERN_ERR PREFIX
1028 "Error parsing LAPIC address override entry\n");
1029 return count;
1030 }
1031
1032 register_lapic_address(acpi_lapic_addr);
1033
1034 return count;
1035}
1036
1037static int __init acpi_parse_madt_lapic_entries(void)
1038{
1039 int count;
1040 int x2count = 0;
1041 int ret;
1042 struct acpi_subtable_proc madt_proc[2];
1043
1044 if (!boot_cpu_has(X86_FEATURE_APIC))
1045 return -ENODEV;
1046
1047 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1048 acpi_parse_sapic, MAX_LOCAL_APIC);
1049
1050 if (!count) {
1051 memset(madt_proc, 0, sizeof(madt_proc));
1052 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1053 madt_proc[0].handler = acpi_parse_lapic;
1054 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1055 madt_proc[1].handler = acpi_parse_x2apic;
1056 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1057 sizeof(struct acpi_table_madt),
1058 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1059 if (ret < 0) {
1060 printk(KERN_ERR PREFIX
1061 "Error parsing LAPIC/X2APIC entries\n");
1062 return ret;
1063 }
1064
1065 count = madt_proc[0].count;
1066 x2count = madt_proc[1].count;
1067 }
1068 if (!count && !x2count) {
1069 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1070 /* TBD: Cleanup to allow fallback to MPS */
1071 return -ENODEV;
1072 } else if (count < 0 || x2count < 0) {
1073 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1074 /* TBD: Cleanup to allow fallback to MPS */
1075 return count;
1076 }
1077
1078 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1079 acpi_parse_x2apic_nmi, 0);
1080 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1081 acpi_parse_lapic_nmi, 0);
1082 if (count < 0 || x2count < 0) {
1083 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1084 /* TBD: Cleanup to allow fallback to MPS */
1085 return count;
1086 }
1087 return 0;
1088}
1089#endif /* CONFIG_X86_LOCAL_APIC */
1090
1091#ifdef CONFIG_X86_IO_APIC
1092static void __init mp_config_acpi_legacy_irqs(void)
1093{
1094 int i;
1095 struct mpc_intsrc mp_irq;
1096
1097#ifdef CONFIG_EISA
1098 /*
1099 * Fabricate the legacy ISA bus (bus #31).
1100 */
1101 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1102#endif
1103 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1104 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1105
1106 /*
1107 * Use the default configuration for the IRQs 0-15. Unless
1108 * overridden by (MADT) interrupt source override entries.
1109 */
1110 for (i = 0; i < nr_legacy_irqs(); i++) {
1111 int ioapic, pin;
1112 unsigned int dstapic;
1113 int idx;
1114 u32 gsi;
1115
1116 /* Locate the gsi that irq i maps to. */
1117 if (acpi_isa_irq_to_gsi(i, &gsi))
1118 continue;
1119
1120 /*
1121 * Locate the IOAPIC that manages the ISA IRQ.
1122 */
1123 ioapic = mp_find_ioapic(gsi);
1124 if (ioapic < 0)
1125 continue;
1126 pin = mp_find_ioapic_pin(ioapic, gsi);
1127 dstapic = mpc_ioapic_id(ioapic);
1128
1129 for (idx = 0; idx < mp_irq_entries; idx++) {
1130 struct mpc_intsrc *irq = mp_irqs + idx;
1131
1132 /* Do we already have a mapping for this ISA IRQ? */
1133 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1134 break;
1135
1136 /* Do we already have a mapping for this IOAPIC pin */
1137 if (irq->dstapic == dstapic && irq->dstirq == pin)
1138 break;
1139 }
1140
1141 if (idx != mp_irq_entries) {
1142 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1143 continue; /* IRQ already used */
1144 }
1145
1146 mp_irq.type = MP_INTSRC;
1147 mp_irq.irqflag = 0; /* Conforming */
1148 mp_irq.srcbus = MP_ISA_BUS;
1149 mp_irq.dstapic = dstapic;
1150 mp_irq.irqtype = mp_INT;
1151 mp_irq.srcbusirq = i; /* Identity mapped */
1152 mp_irq.dstirq = pin;
1153
1154 mp_save_irq(&mp_irq);
1155 }
1156}
1157
1158/*
1159 * Parse IOAPIC related entries in MADT
1160 * returns 0 on success, < 0 on error
1161 */
1162static int __init acpi_parse_madt_ioapic_entries(void)
1163{
1164 int count;
1165
1166 /*
1167 * ACPI interpreter is required to complete interrupt setup,
1168 * so if it is off, don't enumerate the io-apics with ACPI.
1169 * If MPS is present, it will handle them,
1170 * otherwise the system will stay in PIC mode
1171 */
1172 if (acpi_disabled || acpi_noirq)
1173 return -ENODEV;
1174
1175 if (!boot_cpu_has(X86_FEATURE_APIC))
1176 return -ENODEV;
1177
1178 /*
1179 * if "noapic" boot option, don't look for IO-APICs
1180 */
1181 if (skip_ioapic_setup) {
1182 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1183 "due to 'noapic' option.\n");
1184 return -ENODEV;
1185 }
1186
1187 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1188 MAX_IO_APICS);
1189 if (!count) {
1190 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1191 return -ENODEV;
1192 } else if (count < 0) {
1193 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1194 return count;
1195 }
1196
1197 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1198 acpi_parse_int_src_ovr, nr_irqs);
1199 if (count < 0) {
1200 printk(KERN_ERR PREFIX
1201 "Error parsing interrupt source overrides entry\n");
1202 /* TBD: Cleanup to allow fallback to MPS */
1203 return count;
1204 }
1205
1206 /*
1207 * If BIOS did not supply an INT_SRC_OVR for the SCI
1208 * pretend we got one so we can set the SCI flags.
1209 * But ignore setting up SCI on hardware reduced platforms.
1210 */
1211 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1212 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1213 acpi_gbl_FADT.sci_interrupt);
1214
1215 /* Fill in identity legacy mappings where no override */
1216 mp_config_acpi_legacy_irqs();
1217
1218 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1219 acpi_parse_nmi_src, nr_irqs);
1220 if (count < 0) {
1221 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1222 /* TBD: Cleanup to allow fallback to MPS */
1223 return count;
1224 }
1225
1226 return 0;
1227}
1228#else
1229static inline int acpi_parse_madt_ioapic_entries(void)
1230{
1231 return -1;
1232}
1233#endif /* !CONFIG_X86_IO_APIC */
1234
1235static void __init early_acpi_process_madt(void)
1236{
1237#ifdef CONFIG_X86_LOCAL_APIC
1238 int error;
1239
1240 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1241
1242 /*
1243 * Parse MADT LAPIC entries
1244 */
1245 error = early_acpi_parse_madt_lapic_addr_ovr();
1246 if (!error) {
1247 acpi_lapic = 1;
1248 smp_found_config = 1;
1249 }
1250 if (error == -EINVAL) {
1251 /*
1252 * Dell Precision Workstation 410, 610 come here.
1253 */
1254 printk(KERN_ERR PREFIX
1255 "Invalid BIOS MADT, disabling ACPI\n");
1256 disable_acpi();
1257 }
1258 }
1259#endif
1260}
1261
1262static void __init acpi_process_madt(void)
1263{
1264#ifdef CONFIG_X86_LOCAL_APIC
1265 int error;
1266
1267 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1268
1269 /*
1270 * Parse MADT LAPIC entries
1271 */
1272 error = acpi_parse_madt_lapic_entries();
1273 if (!error) {
1274 acpi_lapic = 1;
1275
1276 /*
1277 * Parse MADT IO-APIC entries
1278 */
1279 mutex_lock(&acpi_ioapic_lock);
1280 error = acpi_parse_madt_ioapic_entries();
1281 mutex_unlock(&acpi_ioapic_lock);
1282 if (!error) {
1283 acpi_set_irq_model_ioapic();
1284
1285 smp_found_config = 1;
1286 }
1287 }
1288 if (error == -EINVAL) {
1289 /*
1290 * Dell Precision Workstation 410, 610 come here.
1291 */
1292 printk(KERN_ERR PREFIX
1293 "Invalid BIOS MADT, disabling ACPI\n");
1294 disable_acpi();
1295 }
1296 } else {
1297 /*
1298 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1299 * In the event an MPS table was found, forget it.
1300 * Boot with "acpi=off" to use MPS on such a system.
1301 */
1302 if (smp_found_config) {
1303 printk(KERN_WARNING PREFIX
1304 "No APIC-table, disabling MPS\n");
1305 smp_found_config = 0;
1306 }
1307 }
1308
1309 /*
1310 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1311 * processors, where MPS only supports physical.
1312 */
1313 if (acpi_lapic && acpi_ioapic)
1314 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1315 "information\n");
1316 else if (acpi_lapic)
1317 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1318 "configuration information\n");
1319#endif
1320 return;
1321}
1322
1323static int __init disable_acpi_irq(const struct dmi_system_id *d)
1324{
1325 if (!acpi_force) {
1326 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1327 d->ident);
1328 acpi_noirq_set();
1329 }
1330 return 0;
1331}
1332
1333static int __init disable_acpi_pci(const struct dmi_system_id *d)
1334{
1335 if (!acpi_force) {
1336 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1337 d->ident);
1338 acpi_disable_pci();
1339 }
1340 return 0;
1341}
1342
1343static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1344{
1345 if (!acpi_force) {
1346 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1347 disable_acpi();
1348 } else {
1349 printk(KERN_NOTICE
1350 "Warning: DMI blacklist says broken, but acpi forced\n");
1351 }
1352 return 0;
1353}
1354
1355/*
1356 * Force ignoring BIOS IRQ0 override
1357 */
1358static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1359{
1360 if (!acpi_skip_timer_override) {
1361 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1362 d->ident);
1363 acpi_skip_timer_override = 1;
1364 }
1365 return 0;
1366}
1367
1368/*
1369 * ACPI offers an alternative platform interface model that removes
1370 * ACPI hardware requirements for platforms that do not implement
1371 * the PC Architecture.
1372 *
1373 * We initialize the Hardware-reduced ACPI model here:
1374 */
1375void __init acpi_generic_reduced_hw_init(void)
1376{
1377 /*
1378 * Override x86_init functions and bypass legacy PIC in
1379 * hardware reduced ACPI mode.
1380 */
1381 x86_init.timers.timer_init = x86_init_noop;
1382 x86_init.irqs.pre_vector_init = x86_init_noop;
1383 legacy_pic = &null_legacy_pic;
1384}
1385
1386static void __init acpi_reduced_hw_init(void)
1387{
1388 if (acpi_gbl_reduced_hardware)
1389 x86_init.acpi.reduced_hw_early_init();
1390}
1391
1392/*
1393 * If your system is blacklisted here, but you find that acpi=force
1394 * works for you, please contact linux-acpi@vger.kernel.org
1395 */
1396static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1397 /*
1398 * Boxes that need ACPI disabled
1399 */
1400 {
1401 .callback = dmi_disable_acpi,
1402 .ident = "IBM Thinkpad",
1403 .matches = {
1404 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1405 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1406 },
1407 },
1408
1409 /*
1410 * Boxes that need ACPI PCI IRQ routing disabled
1411 */
1412 {
1413 .callback = disable_acpi_irq,
1414 .ident = "ASUS A7V",
1415 .matches = {
1416 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1417 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1418 /* newer BIOS, Revision 1011, does work */
1419 DMI_MATCH(DMI_BIOS_VERSION,
1420 "ASUS A7V ACPI BIOS Revision 1007"),
1421 },
1422 },
1423 {
1424 /*
1425 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1426 * for LPC bridge, which is needed for the PCI
1427 * interrupt links to work. DSDT fix is in bug 5966.
1428 * 2645, 2646 model numbers are shared with 600/600E/600X
1429 */
1430 .callback = disable_acpi_irq,
1431 .ident = "IBM Thinkpad 600 Series 2645",
1432 .matches = {
1433 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1434 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1435 },
1436 },
1437 {
1438 .callback = disable_acpi_irq,
1439 .ident = "IBM Thinkpad 600 Series 2646",
1440 .matches = {
1441 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1442 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1443 },
1444 },
1445 /*
1446 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1447 */
1448 { /* _BBN 0 bug */
1449 .callback = disable_acpi_pci,
1450 .ident = "ASUS PR-DLS",
1451 .matches = {
1452 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1453 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1454 DMI_MATCH(DMI_BIOS_VERSION,
1455 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1456 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1457 },
1458 },
1459 {
1460 .callback = disable_acpi_pci,
1461 .ident = "Acer TravelMate 36x Laptop",
1462 .matches = {
1463 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1465 },
1466 },
1467 {}
1468};
1469
1470/* second table for DMI checks that should run after early-quirks */
1471static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1472 /*
1473 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1474 * which includes some code which overrides all temperature
1475 * trip points to 16C if the INTIN2 input of the I/O APIC
1476 * is enabled. This input is incorrectly designated the
1477 * ISA IRQ 0 via an interrupt source override even though
1478 * it is wired to the output of the master 8259A and INTIN0
1479 * is not connected at all. Force ignoring BIOS IRQ0
1480 * override in that cases.
1481 */
1482 {
1483 .callback = dmi_ignore_irq0_timer_override,
1484 .ident = "HP nx6115 laptop",
1485 .matches = {
1486 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1487 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1488 },
1489 },
1490 {
1491 .callback = dmi_ignore_irq0_timer_override,
1492 .ident = "HP NX6125 laptop",
1493 .matches = {
1494 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1495 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1496 },
1497 },
1498 {
1499 .callback = dmi_ignore_irq0_timer_override,
1500 .ident = "HP NX6325 laptop",
1501 .matches = {
1502 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1503 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1504 },
1505 },
1506 {
1507 .callback = dmi_ignore_irq0_timer_override,
1508 .ident = "HP 6715b laptop",
1509 .matches = {
1510 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1511 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1512 },
1513 },
1514 {
1515 .callback = dmi_ignore_irq0_timer_override,
1516 .ident = "FUJITSU SIEMENS",
1517 .matches = {
1518 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1519 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1520 },
1521 },
1522 {}
1523};
1524
1525/*
1526 * acpi_boot_table_init() and acpi_boot_init()
1527 * called from setup_arch(), always.
1528 * 1. checksums all tables
1529 * 2. enumerates lapics
1530 * 3. enumerates io-apics
1531 *
1532 * acpi_table_init() is separate to allow reading SRAT without
1533 * other side effects.
1534 *
1535 * side effects of acpi_boot_init:
1536 * acpi_lapic = 1 if LAPIC found
1537 * acpi_ioapic = 1 if IOAPIC found
1538 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1539 * if acpi_blacklisted() acpi_disabled = 1;
1540 * acpi_irq_model=...
1541 * ...
1542 */
1543
1544void __init acpi_boot_table_init(void)
1545{
1546 dmi_check_system(acpi_dmi_table);
1547
1548 /*
1549 * If acpi_disabled, bail out
1550 */
1551 if (acpi_disabled)
1552 return;
1553
1554 /*
1555 * Initialize the ACPI boot-time table parser.
1556 */
1557 if (acpi_table_init()) {
1558 disable_acpi();
1559 return;
1560 }
1561
1562 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1563
1564 /*
1565 * blacklist may disable ACPI entirely
1566 */
1567 if (acpi_blacklisted()) {
1568 if (acpi_force) {
1569 printk(KERN_WARNING PREFIX "acpi=force override\n");
1570 } else {
1571 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1572 disable_acpi();
1573 return;
1574 }
1575 }
1576}
1577
1578int __init early_acpi_boot_init(void)
1579{
1580 /*
1581 * If acpi_disabled, bail out
1582 */
1583 if (acpi_disabled)
1584 return 1;
1585
1586 /*
1587 * Process the Multiple APIC Description Table (MADT), if present
1588 */
1589 early_acpi_process_madt();
1590
1591 /*
1592 * Hardware-reduced ACPI mode initialization:
1593 */
1594 acpi_reduced_hw_init();
1595
1596 return 0;
1597}
1598
1599int __init acpi_boot_init(void)
1600{
1601 /* those are executed after early-quirks are executed */
1602 dmi_check_system(acpi_dmi_table_late);
1603
1604 /*
1605 * If acpi_disabled, bail out
1606 */
1607 if (acpi_disabled)
1608 return 1;
1609
1610 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1611
1612 /*
1613 * set sci_int and PM timer address
1614 */
1615 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1616
1617 /*
1618 * Process the Multiple APIC Description Table (MADT), if present
1619 */
1620 acpi_process_madt();
1621
1622 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1623 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1624 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1625
1626 if (!acpi_noirq)
1627 x86_init.pci.init = pci_acpi_init;
1628
1629 /* Do not enable ACPI SPCR console by default */
1630 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1631 return 0;
1632}
1633
1634static int __init parse_acpi(char *arg)
1635{
1636 if (!arg)
1637 return -EINVAL;
1638
1639 /* "acpi=off" disables both ACPI table parsing and interpreter */
1640 if (strcmp(arg, "off") == 0) {
1641 disable_acpi();
1642 }
1643 /* acpi=force to over-ride black-list */
1644 else if (strcmp(arg, "force") == 0) {
1645 acpi_force = 1;
1646 acpi_disabled = 0;
1647 }
1648 /* acpi=strict disables out-of-spec workarounds */
1649 else if (strcmp(arg, "strict") == 0) {
1650 acpi_strict = 1;
1651 }
1652 /* acpi=rsdt use RSDT instead of XSDT */
1653 else if (strcmp(arg, "rsdt") == 0) {
1654 acpi_gbl_do_not_use_xsdt = TRUE;
1655 }
1656 /* "acpi=noirq" disables ACPI interrupt routing */
1657 else if (strcmp(arg, "noirq") == 0) {
1658 acpi_noirq_set();
1659 }
1660 /* "acpi=copy_dsdt" copys DSDT */
1661 else if (strcmp(arg, "copy_dsdt") == 0) {
1662 acpi_gbl_copy_dsdt_locally = 1;
1663 }
1664 /* "acpi=nocmcff" disables FF mode for corrected errors */
1665 else if (strcmp(arg, "nocmcff") == 0) {
1666 acpi_disable_cmcff = 1;
1667 } else {
1668 /* Core will printk when we return error. */
1669 return -EINVAL;
1670 }
1671 return 0;
1672}
1673early_param("acpi", parse_acpi);
1674
1675static int __init parse_acpi_bgrt(char *arg)
1676{
1677 acpi_nobgrt = true;
1678 return 0;
1679}
1680early_param("bgrt_disable", parse_acpi_bgrt);
1681
1682/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1683static int __init parse_pci(char *arg)
1684{
1685 if (arg && strcmp(arg, "noacpi") == 0)
1686 acpi_disable_pci();
1687 return 0;
1688}
1689early_param("pci", parse_pci);
1690
1691int __init acpi_mps_check(void)
1692{
1693#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1694/* mptable code is not built-in*/
1695 if (acpi_disabled || acpi_noirq) {
1696 printk(KERN_WARNING "MPS support code is not built-in.\n"
1697 "Using acpi=off or acpi=noirq or pci=noacpi "
1698 "may have problem\n");
1699 return 1;
1700 }
1701#endif
1702 return 0;
1703}
1704
1705#ifdef CONFIG_X86_IO_APIC
1706static int __init parse_acpi_skip_timer_override(char *arg)
1707{
1708 acpi_skip_timer_override = 1;
1709 return 0;
1710}
1711early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1712
1713static int __init parse_acpi_use_timer_override(char *arg)
1714{
1715 acpi_use_timer_override = 1;
1716 return 0;
1717}
1718early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1719#endif /* CONFIG_X86_IO_APIC */
1720
1721static int __init setup_acpi_sci(char *s)
1722{
1723 if (!s)
1724 return -EINVAL;
1725 if (!strcmp(s, "edge"))
1726 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1727 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1728 else if (!strcmp(s, "level"))
1729 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1730 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1731 else if (!strcmp(s, "high"))
1732 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1733 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1734 else if (!strcmp(s, "low"))
1735 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1736 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1737 else
1738 return -EINVAL;
1739 return 0;
1740}
1741early_param("acpi_sci", setup_acpi_sci);
1742
1743int __acpi_acquire_global_lock(unsigned int *lock)
1744{
1745 unsigned int old, new, val;
1746 do {
1747 old = *lock;
1748 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1749 val = cmpxchg(lock, old, new);
1750 } while (unlikely (val != old));
1751 return ((new & 0x3) < 3) ? -1 : 0;
1752}
1753
1754int __acpi_release_global_lock(unsigned int *lock)
1755{
1756 unsigned int old, new, val;
1757 do {
1758 old = *lock;
1759 new = old & ~0x3;
1760 val = cmpxchg(lock, old, new);
1761 } while (unlikely (val != old));
1762 return old & 0x1;
1763}
1764
1765void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1766{
1767 e820__range_add(addr, size, E820_TYPE_ACPI);
1768 e820__update_table_print();
1769}
1770
1771void x86_default_set_root_pointer(u64 addr)
1772{
1773 boot_params.acpi_rsdp_addr = addr;
1774}
1775
1776u64 x86_default_get_root_pointer(void)
1777{
1778 return boot_params.acpi_rsdp_addr;
1779}