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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 *
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 */
8
9#include <linux/init.h>
10#include <linux/acpi.h>
11#include <linux/acpi_pmtmr.h>
12#include <linux/efi.h>
13#include <linux/cpumask.h>
14#include <linux/export.h>
15#include <linux/dmi.h>
16#include <linux/irq.h>
17#include <linux/slab.h>
18#include <linux/memblock.h>
19#include <linux/ioport.h>
20#include <linux/pci.h>
21#include <linux/efi-bgrt.h>
22#include <linux/serial_core.h>
23
24#include <asm/e820/api.h>
25#include <asm/irqdomain.h>
26#include <asm/pci_x86.h>
27#include <asm/pgtable.h>
28#include <asm/io_apic.h>
29#include <asm/apic.h>
30#include <asm/io.h>
31#include <asm/mpspec.h>
32#include <asm/smp.h>
33#include <asm/i8259.h>
34#include <asm/setup.h>
35
36#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
37static int __initdata acpi_force = 0;
38int acpi_disabled;
39EXPORT_SYMBOL(acpi_disabled);
40
41#ifdef CONFIG_X86_64
42# include <asm/proto.h>
43#endif /* X86 */
44
45#define PREFIX "ACPI: "
46
47int acpi_noirq; /* skip ACPI IRQ initialization */
48int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
49EXPORT_SYMBOL(acpi_pci_disabled);
50
51int acpi_lapic;
52int acpi_ioapic;
53int acpi_strict;
54int acpi_disable_cmcff;
55
56/* ACPI SCI override configuration */
57u8 acpi_sci_flags __initdata;
58u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
59int acpi_skip_timer_override __initdata;
60int acpi_use_timer_override __initdata;
61int acpi_fix_pin2_polarity __initdata;
62
63#ifdef CONFIG_X86_LOCAL_APIC
64static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
65#endif
66
67#ifdef CONFIG_X86_IO_APIC
68/*
69 * Locks related to IOAPIC hotplug
70 * Hotplug side:
71 * ->device_hotplug_lock
72 * ->acpi_ioapic_lock
73 * ->ioapic_lock
74 * Interrupt mapping side:
75 * ->acpi_ioapic_lock
76 * ->ioapic_mutex
77 * ->ioapic_lock
78 */
79static DEFINE_MUTEX(acpi_ioapic_lock);
80#endif
81
82/* --------------------------------------------------------------------------
83 Boot-time Configuration
84 -------------------------------------------------------------------------- */
85
86/*
87 * The default interrupt routing model is PIC (8259). This gets
88 * overridden if IOAPICs are enumerated (below).
89 */
90enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
91
92
93/*
94 * ISA irqs by default are the first 16 gsis but can be
95 * any gsi as specified by an interrupt source override.
96 */
97static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
98 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
99};
100
101/*
102 * This is just a simple wrapper around early_memremap(),
103 * with sanity checks for phys == 0 and size == 0.
104 */
105void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
106{
107
108 if (!phys || !size)
109 return NULL;
110
111 return early_memremap(phys, size);
112}
113
114void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
115{
116 if (!map || !size)
117 return;
118
119 early_memunmap(map, size);
120}
121
122#ifdef CONFIG_X86_LOCAL_APIC
123static int __init acpi_parse_madt(struct acpi_table_header *table)
124{
125 struct acpi_table_madt *madt = NULL;
126
127 if (!boot_cpu_has(X86_FEATURE_APIC))
128 return -EINVAL;
129
130 madt = (struct acpi_table_madt *)table;
131 if (!madt) {
132 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
133 return -ENODEV;
134 }
135
136 if (madt->address) {
137 acpi_lapic_addr = (u64) madt->address;
138
139 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
140 madt->address);
141 }
142
143 default_acpi_madt_oem_check(madt->header.oem_id,
144 madt->header.oem_table_id);
145
146 return 0;
147}
148
149/**
150 * acpi_register_lapic - register a local apic and generates a logic cpu number
151 * @id: local apic id to register
152 * @acpiid: ACPI id to register
153 * @enabled: this cpu is enabled or not
154 *
155 * Returns the logic cpu number which maps to the local apic
156 */
157static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
158{
159 unsigned int ver = 0;
160 int cpu;
161
162 if (id >= MAX_LOCAL_APIC) {
163 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
164 return -EINVAL;
165 }
166
167 if (!enabled) {
168 ++disabled_cpus;
169 return -EINVAL;
170 }
171
172 if (boot_cpu_physical_apicid != -1U)
173 ver = boot_cpu_apic_version;
174
175 cpu = generic_processor_info(id, ver);
176 if (cpu >= 0)
177 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
178
179 return cpu;
180}
181
182static int __init
183acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
184{
185 struct acpi_madt_local_x2apic *processor = NULL;
186#ifdef CONFIG_X86_X2APIC
187 u32 apic_id;
188 u8 enabled;
189#endif
190
191 processor = (struct acpi_madt_local_x2apic *)header;
192
193 if (BAD_MADT_ENTRY(processor, end))
194 return -EINVAL;
195
196 acpi_table_print_madt_entry(&header->common);
197
198#ifdef CONFIG_X86_X2APIC
199 apic_id = processor->local_apic_id;
200 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
201
202 /* Ignore invalid ID */
203 if (apic_id == 0xffffffff)
204 return 0;
205
206 /*
207 * We need to register disabled CPU as well to permit
208 * counting disabled CPUs. This allows us to size
209 * cpus_possible_map more accurately, to permit
210 * to not preallocating memory for all NR_CPUS
211 * when we use CPU hotplug.
212 */
213 if (!apic->apic_id_valid(apic_id)) {
214 if (enabled)
215 pr_warn(PREFIX "x2apic entry ignored\n");
216 return 0;
217 }
218
219 acpi_register_lapic(apic_id, processor->uid, enabled);
220#else
221 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
222#endif
223
224 return 0;
225}
226
227static int __init
228acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
229{
230 struct acpi_madt_local_apic *processor = NULL;
231
232 processor = (struct acpi_madt_local_apic *)header;
233
234 if (BAD_MADT_ENTRY(processor, end))
235 return -EINVAL;
236
237 acpi_table_print_madt_entry(&header->common);
238
239 /* Ignore invalid ID */
240 if (processor->id == 0xff)
241 return 0;
242
243 /*
244 * We need to register disabled CPU as well to permit
245 * counting disabled CPUs. This allows us to size
246 * cpus_possible_map more accurately, to permit
247 * to not preallocating memory for all NR_CPUS
248 * when we use CPU hotplug.
249 */
250 acpi_register_lapic(processor->id, /* APIC ID */
251 processor->processor_id, /* ACPI ID */
252 processor->lapic_flags & ACPI_MADT_ENABLED);
253
254 return 0;
255}
256
257static int __init
258acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
259{
260 struct acpi_madt_local_sapic *processor = NULL;
261
262 processor = (struct acpi_madt_local_sapic *)header;
263
264 if (BAD_MADT_ENTRY(processor, end))
265 return -EINVAL;
266
267 acpi_table_print_madt_entry(&header->common);
268
269 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
270 processor->processor_id, /* ACPI ID */
271 processor->lapic_flags & ACPI_MADT_ENABLED);
272
273 return 0;
274}
275
276static int __init
277acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
278 const unsigned long end)
279{
280 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
281
282 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
283
284 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
285 return -EINVAL;
286
287 acpi_table_print_madt_entry(&header->common);
288
289 acpi_lapic_addr = lapic_addr_ovr->address;
290
291 return 0;
292}
293
294static int __init
295acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
296 const unsigned long end)
297{
298 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
299
300 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
301
302 if (BAD_MADT_ENTRY(x2apic_nmi, end))
303 return -EINVAL;
304
305 acpi_table_print_madt_entry(&header->common);
306
307 if (x2apic_nmi->lint != 1)
308 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
309
310 return 0;
311}
312
313static int __init
314acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
315{
316 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
317
318 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
319
320 if (BAD_MADT_ENTRY(lapic_nmi, end))
321 return -EINVAL;
322
323 acpi_table_print_madt_entry(&header->common);
324
325 if (lapic_nmi->lint != 1)
326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
327
328 return 0;
329}
330
331#endif /*CONFIG_X86_LOCAL_APIC */
332
333#ifdef CONFIG_X86_IO_APIC
334#define MP_ISA_BUS 0
335
336static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
337 u8 trigger, u32 gsi);
338
339static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
340 u32 gsi)
341{
342 /*
343 * Check bus_irq boundary.
344 */
345 if (bus_irq >= NR_IRQS_LEGACY) {
346 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
347 return;
348 }
349
350 /*
351 * TBD: This check is for faulty timer entries, where the override
352 * erroneously sets the trigger to level, resulting in a HUGE
353 * increase of timer interrupts!
354 */
355 if ((bus_irq == 0) && (trigger == 3))
356 trigger = 1;
357
358 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
359 return;
360 /*
361 * Reset default identity mapping if gsi is also an legacy IRQ,
362 * otherwise there will be more than one entry with the same GSI
363 * and acpi_isa_irq_to_gsi() may give wrong result.
364 */
365 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
366 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
367 isa_irq_to_gsi[bus_irq] = gsi;
368}
369
370static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
371 int polarity)
372{
373#ifdef CONFIG_X86_MPPARSE
374 struct mpc_intsrc mp_irq;
375 struct pci_dev *pdev;
376 unsigned char number;
377 unsigned int devfn;
378 int ioapic;
379 u8 pin;
380
381 if (!acpi_ioapic)
382 return 0;
383 if (!dev || !dev_is_pci(dev))
384 return 0;
385
386 pdev = to_pci_dev(dev);
387 number = pdev->bus->number;
388 devfn = pdev->devfn;
389 pin = pdev->pin;
390 /* print the entry should happen on mptable identically */
391 mp_irq.type = MP_INTSRC;
392 mp_irq.irqtype = mp_INT;
393 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
394 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
395 mp_irq.srcbus = number;
396 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
397 ioapic = mp_find_ioapic(gsi);
398 mp_irq.dstapic = mpc_ioapic_id(ioapic);
399 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
400
401 mp_save_irq(&mp_irq);
402#endif
403 return 0;
404}
405
406static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
407 u8 trigger, u32 gsi)
408{
409 struct mpc_intsrc mp_irq;
410 int ioapic, pin;
411
412 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
413 ioapic = mp_find_ioapic(gsi);
414 if (ioapic < 0) {
415 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
416 return ioapic;
417 }
418
419 pin = mp_find_ioapic_pin(ioapic, gsi);
420
421 mp_irq.type = MP_INTSRC;
422 mp_irq.irqtype = mp_INT;
423 mp_irq.irqflag = (trigger << 2) | polarity;
424 mp_irq.srcbus = MP_ISA_BUS;
425 mp_irq.srcbusirq = bus_irq;
426 mp_irq.dstapic = mpc_ioapic_id(ioapic);
427 mp_irq.dstirq = pin;
428
429 mp_save_irq(&mp_irq);
430
431 return 0;
432}
433
434static int __init
435acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
436{
437 struct acpi_madt_io_apic *ioapic = NULL;
438 struct ioapic_domain_cfg cfg = {
439 .type = IOAPIC_DOMAIN_DYNAMIC,
440 .ops = &mp_ioapic_irqdomain_ops,
441 };
442
443 ioapic = (struct acpi_madt_io_apic *)header;
444
445 if (BAD_MADT_ENTRY(ioapic, end))
446 return -EINVAL;
447
448 acpi_table_print_madt_entry(&header->common);
449
450 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
451 if (ioapic->global_irq_base < nr_legacy_irqs())
452 cfg.type = IOAPIC_DOMAIN_LEGACY;
453
454 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
455 &cfg);
456
457 return 0;
458}
459
460/*
461 * Parse Interrupt Source Override for the ACPI SCI
462 */
463static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
464{
465 if (trigger == 0) /* compatible SCI trigger is level */
466 trigger = 3;
467
468 if (polarity == 0) /* compatible SCI polarity is low */
469 polarity = 3;
470
471 /* Command-line over-ride via acpi_sci= */
472 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
473 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
474
475 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
476 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
477
478 if (bus_irq < NR_IRQS_LEGACY)
479 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
480 else
481 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
482
483 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
484
485 /*
486 * stash over-ride to indicate we've been here
487 * and for later update of acpi_gbl_FADT
488 */
489 acpi_sci_override_gsi = gsi;
490 return;
491}
492
493static int __init
494acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
495 const unsigned long end)
496{
497 struct acpi_madt_interrupt_override *intsrc = NULL;
498
499 intsrc = (struct acpi_madt_interrupt_override *)header;
500
501 if (BAD_MADT_ENTRY(intsrc, end))
502 return -EINVAL;
503
504 acpi_table_print_madt_entry(&header->common);
505
506 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
507 acpi_sci_ioapic_setup(intsrc->source_irq,
508 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
509 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
510 intsrc->global_irq);
511 return 0;
512 }
513
514 if (intsrc->source_irq == 0) {
515 if (acpi_skip_timer_override) {
516 printk(PREFIX "BIOS IRQ0 override ignored.\n");
517 return 0;
518 }
519
520 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
521 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
522 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
523 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
524 }
525 }
526
527 mp_override_legacy_irq(intsrc->source_irq,
528 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
529 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
530 intsrc->global_irq);
531
532 return 0;
533}
534
535static int __init
536acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
537{
538 struct acpi_madt_nmi_source *nmi_src = NULL;
539
540 nmi_src = (struct acpi_madt_nmi_source *)header;
541
542 if (BAD_MADT_ENTRY(nmi_src, end))
543 return -EINVAL;
544
545 acpi_table_print_madt_entry(&header->common);
546
547 /* TBD: Support nimsrc entries? */
548
549 return 0;
550}
551
552#endif /* CONFIG_X86_IO_APIC */
553
554/*
555 * acpi_pic_sci_set_trigger()
556 *
557 * use ELCR to set PIC-mode trigger type for SCI
558 *
559 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
560 * it may require Edge Trigger -- use "acpi_sci=edge"
561 *
562 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
563 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
564 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
565 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
566 */
567
568void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
569{
570 unsigned int mask = 1 << irq;
571 unsigned int old, new;
572
573 /* Real old ELCR mask */
574 old = inb(0x4d0) | (inb(0x4d1) << 8);
575
576 /*
577 * If we use ACPI to set PCI IRQs, then we should clear ELCR
578 * since we will set it correctly as we enable the PCI irq
579 * routing.
580 */
581 new = acpi_noirq ? old : 0;
582
583 /*
584 * Update SCI information in the ELCR, it isn't in the PCI
585 * routing tables..
586 */
587 switch (trigger) {
588 case 1: /* Edge - clear */
589 new &= ~mask;
590 break;
591 case 3: /* Level - set */
592 new |= mask;
593 break;
594 }
595
596 if (old == new)
597 return;
598
599 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
600 outb(new, 0x4d0);
601 outb(new >> 8, 0x4d1);
602}
603
604int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
605{
606 int rc, irq, trigger, polarity;
607
608 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
609 *irqp = gsi;
610 return 0;
611 }
612
613 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
614 if (rc)
615 return rc;
616
617 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
618 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
619 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
620 if (irq < 0)
621 return irq;
622
623 *irqp = irq;
624 return 0;
625}
626EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
627
628int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
629{
630 if (isa_irq < nr_legacy_irqs() &&
631 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
632 *gsi = isa_irq_to_gsi[isa_irq];
633 return 0;
634 }
635
636 return -1;
637}
638
639static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
640 int trigger, int polarity)
641{
642#ifdef CONFIG_PCI
643 /*
644 * Make sure all (legacy) PCI IRQs are set as level-triggered.
645 */
646 if (trigger == ACPI_LEVEL_SENSITIVE)
647 elcr_set_level_irq(gsi);
648#endif
649
650 return gsi;
651}
652
653#ifdef CONFIG_X86_LOCAL_APIC
654static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
655 int trigger, int polarity)
656{
657 int irq = gsi;
658#ifdef CONFIG_X86_IO_APIC
659 int node;
660 struct irq_alloc_info info;
661
662 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
663 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
664 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
665 ioapic_set_alloc_attr(&info, node, trigger, polarity);
666
667 mutex_lock(&acpi_ioapic_lock);
668 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
669 /* Don't set up the ACPI SCI because it's already set up */
670 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
671 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
672 mutex_unlock(&acpi_ioapic_lock);
673#endif
674
675 return irq;
676}
677
678static void acpi_unregister_gsi_ioapic(u32 gsi)
679{
680#ifdef CONFIG_X86_IO_APIC
681 int irq;
682
683 mutex_lock(&acpi_ioapic_lock);
684 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
685 if (irq > 0)
686 mp_unmap_irq(irq);
687 mutex_unlock(&acpi_ioapic_lock);
688#endif
689}
690#endif
691
692int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
693 int trigger, int polarity) = acpi_register_gsi_pic;
694void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
695
696#ifdef CONFIG_ACPI_SLEEP
697int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
698#else
699int (*acpi_suspend_lowlevel)(void);
700#endif
701
702/*
703 * success: return IRQ number (>=0)
704 * failure: return < 0
705 */
706int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
707{
708 return __acpi_register_gsi(dev, gsi, trigger, polarity);
709}
710EXPORT_SYMBOL_GPL(acpi_register_gsi);
711
712void acpi_unregister_gsi(u32 gsi)
713{
714 if (__acpi_unregister_gsi)
715 __acpi_unregister_gsi(gsi);
716}
717EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
718
719#ifdef CONFIG_X86_LOCAL_APIC
720static void __init acpi_set_irq_model_ioapic(void)
721{
722 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
723 __acpi_register_gsi = acpi_register_gsi_ioapic;
724 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
725 acpi_ioapic = 1;
726}
727#endif
728
729/*
730 * ACPI based hotplug support for CPU
731 */
732#ifdef CONFIG_ACPI_HOTPLUG_CPU
733#include <acpi/processor.h>
734
735static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
736{
737#ifdef CONFIG_ACPI_NUMA
738 int nid;
739
740 nid = acpi_get_node(handle);
741 if (nid != NUMA_NO_NODE) {
742 set_apicid_to_node(physid, nid);
743 numa_set_node(cpu, nid);
744 }
745#endif
746 return 0;
747}
748
749int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
750 int *pcpu)
751{
752 int cpu;
753
754 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
755 if (cpu < 0) {
756 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
757 return cpu;
758 }
759
760 acpi_processor_set_pdc(handle);
761 acpi_map_cpu2node(handle, cpu, physid);
762
763 *pcpu = cpu;
764 return 0;
765}
766EXPORT_SYMBOL(acpi_map_cpu);
767
768int acpi_unmap_cpu(int cpu)
769{
770#ifdef CONFIG_ACPI_NUMA
771 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
772#endif
773
774 per_cpu(x86_cpu_to_apicid, cpu) = -1;
775 set_cpu_present(cpu, false);
776 num_processors--;
777
778 return (0);
779}
780EXPORT_SYMBOL(acpi_unmap_cpu);
781#endif /* CONFIG_ACPI_HOTPLUG_CPU */
782
783int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
784{
785 int ret = -ENOSYS;
786#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
787 int ioapic_id;
788 u64 addr;
789 struct ioapic_domain_cfg cfg = {
790 .type = IOAPIC_DOMAIN_DYNAMIC,
791 .ops = &mp_ioapic_irqdomain_ops,
792 };
793
794 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
795 if (ioapic_id < 0) {
796 unsigned long long uid;
797 acpi_status status;
798
799 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
800 NULL, &uid);
801 if (ACPI_FAILURE(status)) {
802 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
803 return -EINVAL;
804 }
805 ioapic_id = (int)uid;
806 }
807
808 mutex_lock(&acpi_ioapic_lock);
809 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
810 mutex_unlock(&acpi_ioapic_lock);
811#endif
812
813 return ret;
814}
815EXPORT_SYMBOL(acpi_register_ioapic);
816
817int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
818{
819 int ret = -ENOSYS;
820
821#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
822 mutex_lock(&acpi_ioapic_lock);
823 ret = mp_unregister_ioapic(gsi_base);
824 mutex_unlock(&acpi_ioapic_lock);
825#endif
826
827 return ret;
828}
829EXPORT_SYMBOL(acpi_unregister_ioapic);
830
831/**
832 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
833 * has been registered
834 * @handle: ACPI handle of the IOAPIC device
835 * @gsi_base: GSI base associated with the IOAPIC
836 *
837 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
838 * with acpi_register_ioapic()/acpi_unregister_ioapic().
839 */
840int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
841{
842 int ret = 0;
843
844#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
845 mutex_lock(&acpi_ioapic_lock);
846 ret = mp_ioapic_registered(gsi_base);
847 mutex_unlock(&acpi_ioapic_lock);
848#endif
849
850 return ret;
851}
852
853static int __init acpi_parse_sbf(struct acpi_table_header *table)
854{
855 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
856
857 sbf_port = sb->cmos_index; /* Save CMOS port */
858
859 return 0;
860}
861
862#ifdef CONFIG_HPET_TIMER
863#include <asm/hpet.h>
864
865static struct resource *hpet_res __initdata;
866
867static int __init acpi_parse_hpet(struct acpi_table_header *table)
868{
869 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
870
871 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
872 printk(KERN_WARNING PREFIX "HPET timers must be located in "
873 "memory.\n");
874 return -1;
875 }
876
877 hpet_address = hpet_tbl->address.address;
878 hpet_blockid = hpet_tbl->sequence;
879
880 /*
881 * Some broken BIOSes advertise HPET at 0x0. We really do not
882 * want to allocate a resource there.
883 */
884 if (!hpet_address) {
885 printk(KERN_WARNING PREFIX
886 "HPET id: %#x base: %#lx is invalid\n",
887 hpet_tbl->id, hpet_address);
888 return 0;
889 }
890#ifdef CONFIG_X86_64
891 /*
892 * Some even more broken BIOSes advertise HPET at
893 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
894 * some noise:
895 */
896 if (hpet_address == 0xfed0000000000000UL) {
897 if (!hpet_force_user) {
898 printk(KERN_WARNING PREFIX "HPET id: %#x "
899 "base: 0xfed0000000000000 is bogus\n "
900 "try hpet=force on the kernel command line to "
901 "fix it up to 0xfed00000.\n", hpet_tbl->id);
902 hpet_address = 0;
903 return 0;
904 }
905 printk(KERN_WARNING PREFIX
906 "HPET id: %#x base: 0xfed0000000000000 fixed up "
907 "to 0xfed00000.\n", hpet_tbl->id);
908 hpet_address >>= 32;
909 }
910#endif
911 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
912 hpet_tbl->id, hpet_address);
913
914 /*
915 * Allocate and initialize the HPET firmware resource for adding into
916 * the resource tree during the lateinit timeframe.
917 */
918#define HPET_RESOURCE_NAME_SIZE 9
919 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
920 SMP_CACHE_BYTES);
921 if (!hpet_res)
922 panic("%s: Failed to allocate %zu bytes\n", __func__,
923 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
924
925 hpet_res->name = (void *)&hpet_res[1];
926 hpet_res->flags = IORESOURCE_MEM;
927 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
928 hpet_tbl->sequence);
929
930 hpet_res->start = hpet_address;
931 hpet_res->end = hpet_address + (1 * 1024) - 1;
932
933 return 0;
934}
935
936/*
937 * hpet_insert_resource inserts the HPET resources used into the resource
938 * tree.
939 */
940static __init int hpet_insert_resource(void)
941{
942 if (!hpet_res)
943 return 1;
944
945 return insert_resource(&iomem_resource, hpet_res);
946}
947
948late_initcall(hpet_insert_resource);
949
950#else
951#define acpi_parse_hpet NULL
952#endif
953
954static int __init acpi_parse_fadt(struct acpi_table_header *table)
955{
956 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
957 pr_debug("ACPI: no legacy devices present\n");
958 x86_platform.legacy.devices.pnpbios = 0;
959 }
960
961 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
962 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
963 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
964 pr_debug("ACPI: i8042 controller is absent\n");
965 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
966 }
967
968 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
969 pr_debug("ACPI: not registering RTC platform device\n");
970 x86_platform.legacy.rtc = 0;
971 }
972
973 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
974 pr_debug("ACPI: probing for VGA not safe\n");
975 x86_platform.legacy.no_vga = 1;
976 }
977
978#ifdef CONFIG_X86_PM_TIMER
979 /* detect the location of the ACPI PM Timer */
980 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
981 /* FADT rev. 2 */
982 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
983 ACPI_ADR_SPACE_SYSTEM_IO)
984 return 0;
985
986 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
987 /*
988 * "X" fields are optional extensions to the original V1.0
989 * fields, so we must selectively expand V1.0 fields if the
990 * corresponding X field is zero.
991 */
992 if (!pmtmr_ioport)
993 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
994 } else {
995 /* FADT rev. 1 */
996 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
997 }
998 if (pmtmr_ioport)
999 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1000 pmtmr_ioport);
1001#endif
1002 return 0;
1003}
1004
1005#ifdef CONFIG_X86_LOCAL_APIC
1006/*
1007 * Parse LAPIC entries in MADT
1008 * returns 0 on success, < 0 on error
1009 */
1010
1011static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1012{
1013 int count;
1014
1015 if (!boot_cpu_has(X86_FEATURE_APIC))
1016 return -ENODEV;
1017
1018 /*
1019 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1020 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1021 */
1022
1023 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1024 acpi_parse_lapic_addr_ovr, 0);
1025 if (count < 0) {
1026 printk(KERN_ERR PREFIX
1027 "Error parsing LAPIC address override entry\n");
1028 return count;
1029 }
1030
1031 register_lapic_address(acpi_lapic_addr);
1032
1033 return count;
1034}
1035
1036static int __init acpi_parse_madt_lapic_entries(void)
1037{
1038 int count;
1039 int x2count = 0;
1040 int ret;
1041 struct acpi_subtable_proc madt_proc[2];
1042
1043 if (!boot_cpu_has(X86_FEATURE_APIC))
1044 return -ENODEV;
1045
1046 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1047 acpi_parse_sapic, MAX_LOCAL_APIC);
1048
1049 if (!count) {
1050 memset(madt_proc, 0, sizeof(madt_proc));
1051 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1052 madt_proc[0].handler = acpi_parse_lapic;
1053 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1054 madt_proc[1].handler = acpi_parse_x2apic;
1055 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1056 sizeof(struct acpi_table_madt),
1057 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1058 if (ret < 0) {
1059 printk(KERN_ERR PREFIX
1060 "Error parsing LAPIC/X2APIC entries\n");
1061 return ret;
1062 }
1063
1064 count = madt_proc[0].count;
1065 x2count = madt_proc[1].count;
1066 }
1067 if (!count && !x2count) {
1068 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1069 /* TBD: Cleanup to allow fallback to MPS */
1070 return -ENODEV;
1071 } else if (count < 0 || x2count < 0) {
1072 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1073 /* TBD: Cleanup to allow fallback to MPS */
1074 return count;
1075 }
1076
1077 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1078 acpi_parse_x2apic_nmi, 0);
1079 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1080 acpi_parse_lapic_nmi, 0);
1081 if (count < 0 || x2count < 0) {
1082 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1083 /* TBD: Cleanup to allow fallback to MPS */
1084 return count;
1085 }
1086 return 0;
1087}
1088#endif /* CONFIG_X86_LOCAL_APIC */
1089
1090#ifdef CONFIG_X86_IO_APIC
1091static void __init mp_config_acpi_legacy_irqs(void)
1092{
1093 int i;
1094 struct mpc_intsrc mp_irq;
1095
1096#ifdef CONFIG_EISA
1097 /*
1098 * Fabricate the legacy ISA bus (bus #31).
1099 */
1100 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1101#endif
1102 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1103 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1104
1105 /*
1106 * Use the default configuration for the IRQs 0-15. Unless
1107 * overridden by (MADT) interrupt source override entries.
1108 */
1109 for (i = 0; i < nr_legacy_irqs(); i++) {
1110 int ioapic, pin;
1111 unsigned int dstapic;
1112 int idx;
1113 u32 gsi;
1114
1115 /* Locate the gsi that irq i maps to. */
1116 if (acpi_isa_irq_to_gsi(i, &gsi))
1117 continue;
1118
1119 /*
1120 * Locate the IOAPIC that manages the ISA IRQ.
1121 */
1122 ioapic = mp_find_ioapic(gsi);
1123 if (ioapic < 0)
1124 continue;
1125 pin = mp_find_ioapic_pin(ioapic, gsi);
1126 dstapic = mpc_ioapic_id(ioapic);
1127
1128 for (idx = 0; idx < mp_irq_entries; idx++) {
1129 struct mpc_intsrc *irq = mp_irqs + idx;
1130
1131 /* Do we already have a mapping for this ISA IRQ? */
1132 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1133 break;
1134
1135 /* Do we already have a mapping for this IOAPIC pin */
1136 if (irq->dstapic == dstapic && irq->dstirq == pin)
1137 break;
1138 }
1139
1140 if (idx != mp_irq_entries) {
1141 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1142 continue; /* IRQ already used */
1143 }
1144
1145 mp_irq.type = MP_INTSRC;
1146 mp_irq.irqflag = 0; /* Conforming */
1147 mp_irq.srcbus = MP_ISA_BUS;
1148 mp_irq.dstapic = dstapic;
1149 mp_irq.irqtype = mp_INT;
1150 mp_irq.srcbusirq = i; /* Identity mapped */
1151 mp_irq.dstirq = pin;
1152
1153 mp_save_irq(&mp_irq);
1154 }
1155}
1156
1157/*
1158 * Parse IOAPIC related entries in MADT
1159 * returns 0 on success, < 0 on error
1160 */
1161static int __init acpi_parse_madt_ioapic_entries(void)
1162{
1163 int count;
1164
1165 /*
1166 * ACPI interpreter is required to complete interrupt setup,
1167 * so if it is off, don't enumerate the io-apics with ACPI.
1168 * If MPS is present, it will handle them,
1169 * otherwise the system will stay in PIC mode
1170 */
1171 if (acpi_disabled || acpi_noirq)
1172 return -ENODEV;
1173
1174 if (!boot_cpu_has(X86_FEATURE_APIC))
1175 return -ENODEV;
1176
1177 /*
1178 * if "noapic" boot option, don't look for IO-APICs
1179 */
1180 if (skip_ioapic_setup) {
1181 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1182 "due to 'noapic' option.\n");
1183 return -ENODEV;
1184 }
1185
1186 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1187 MAX_IO_APICS);
1188 if (!count) {
1189 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1190 return -ENODEV;
1191 } else if (count < 0) {
1192 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1193 return count;
1194 }
1195
1196 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1197 acpi_parse_int_src_ovr, nr_irqs);
1198 if (count < 0) {
1199 printk(KERN_ERR PREFIX
1200 "Error parsing interrupt source overrides entry\n");
1201 /* TBD: Cleanup to allow fallback to MPS */
1202 return count;
1203 }
1204
1205 /*
1206 * If BIOS did not supply an INT_SRC_OVR for the SCI
1207 * pretend we got one so we can set the SCI flags.
1208 * But ignore setting up SCI on hardware reduced platforms.
1209 */
1210 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1211 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1212 acpi_gbl_FADT.sci_interrupt);
1213
1214 /* Fill in identity legacy mappings where no override */
1215 mp_config_acpi_legacy_irqs();
1216
1217 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1218 acpi_parse_nmi_src, nr_irqs);
1219 if (count < 0) {
1220 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1221 /* TBD: Cleanup to allow fallback to MPS */
1222 return count;
1223 }
1224
1225 return 0;
1226}
1227#else
1228static inline int acpi_parse_madt_ioapic_entries(void)
1229{
1230 return -1;
1231}
1232#endif /* !CONFIG_X86_IO_APIC */
1233
1234static void __init early_acpi_process_madt(void)
1235{
1236#ifdef CONFIG_X86_LOCAL_APIC
1237 int error;
1238
1239 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1240
1241 /*
1242 * Parse MADT LAPIC entries
1243 */
1244 error = early_acpi_parse_madt_lapic_addr_ovr();
1245 if (!error) {
1246 acpi_lapic = 1;
1247 smp_found_config = 1;
1248 }
1249 if (error == -EINVAL) {
1250 /*
1251 * Dell Precision Workstation 410, 610 come here.
1252 */
1253 printk(KERN_ERR PREFIX
1254 "Invalid BIOS MADT, disabling ACPI\n");
1255 disable_acpi();
1256 }
1257 }
1258#endif
1259}
1260
1261static void __init acpi_process_madt(void)
1262{
1263#ifdef CONFIG_X86_LOCAL_APIC
1264 int error;
1265
1266 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1267
1268 /*
1269 * Parse MADT LAPIC entries
1270 */
1271 error = acpi_parse_madt_lapic_entries();
1272 if (!error) {
1273 acpi_lapic = 1;
1274
1275 /*
1276 * Parse MADT IO-APIC entries
1277 */
1278 mutex_lock(&acpi_ioapic_lock);
1279 error = acpi_parse_madt_ioapic_entries();
1280 mutex_unlock(&acpi_ioapic_lock);
1281 if (!error) {
1282 acpi_set_irq_model_ioapic();
1283
1284 smp_found_config = 1;
1285 }
1286 }
1287 if (error == -EINVAL) {
1288 /*
1289 * Dell Precision Workstation 410, 610 come here.
1290 */
1291 printk(KERN_ERR PREFIX
1292 "Invalid BIOS MADT, disabling ACPI\n");
1293 disable_acpi();
1294 }
1295 } else {
1296 /*
1297 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1298 * In the event an MPS table was found, forget it.
1299 * Boot with "acpi=off" to use MPS on such a system.
1300 */
1301 if (smp_found_config) {
1302 printk(KERN_WARNING PREFIX
1303 "No APIC-table, disabling MPS\n");
1304 smp_found_config = 0;
1305 }
1306 }
1307
1308 /*
1309 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1310 * processors, where MPS only supports physical.
1311 */
1312 if (acpi_lapic && acpi_ioapic)
1313 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1314 "information\n");
1315 else if (acpi_lapic)
1316 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1317 "configuration information\n");
1318#endif
1319 return;
1320}
1321
1322static int __init disable_acpi_irq(const struct dmi_system_id *d)
1323{
1324 if (!acpi_force) {
1325 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1326 d->ident);
1327 acpi_noirq_set();
1328 }
1329 return 0;
1330}
1331
1332static int __init disable_acpi_pci(const struct dmi_system_id *d)
1333{
1334 if (!acpi_force) {
1335 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1336 d->ident);
1337 acpi_disable_pci();
1338 }
1339 return 0;
1340}
1341
1342static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1343{
1344 if (!acpi_force) {
1345 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1346 disable_acpi();
1347 } else {
1348 printk(KERN_NOTICE
1349 "Warning: DMI blacklist says broken, but acpi forced\n");
1350 }
1351 return 0;
1352}
1353
1354/*
1355 * Force ignoring BIOS IRQ0 override
1356 */
1357static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1358{
1359 if (!acpi_skip_timer_override) {
1360 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1361 d->ident);
1362 acpi_skip_timer_override = 1;
1363 }
1364 return 0;
1365}
1366
1367/*
1368 * ACPI offers an alternative platform interface model that removes
1369 * ACPI hardware requirements for platforms that do not implement
1370 * the PC Architecture.
1371 *
1372 * We initialize the Hardware-reduced ACPI model here:
1373 */
1374void __init acpi_generic_reduced_hw_init(void)
1375{
1376 /*
1377 * Override x86_init functions and bypass legacy PIC in
1378 * hardware reduced ACPI mode.
1379 */
1380 x86_init.timers.timer_init = x86_init_noop;
1381 x86_init.irqs.pre_vector_init = x86_init_noop;
1382 legacy_pic = &null_legacy_pic;
1383}
1384
1385static void __init acpi_reduced_hw_init(void)
1386{
1387 if (acpi_gbl_reduced_hardware)
1388 x86_init.acpi.reduced_hw_early_init();
1389}
1390
1391/*
1392 * If your system is blacklisted here, but you find that acpi=force
1393 * works for you, please contact linux-acpi@vger.kernel.org
1394 */
1395static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1396 /*
1397 * Boxes that need ACPI disabled
1398 */
1399 {
1400 .callback = dmi_disable_acpi,
1401 .ident = "IBM Thinkpad",
1402 .matches = {
1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1404 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1405 },
1406 },
1407
1408 /*
1409 * Boxes that need ACPI PCI IRQ routing disabled
1410 */
1411 {
1412 .callback = disable_acpi_irq,
1413 .ident = "ASUS A7V",
1414 .matches = {
1415 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1416 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1417 /* newer BIOS, Revision 1011, does work */
1418 DMI_MATCH(DMI_BIOS_VERSION,
1419 "ASUS A7V ACPI BIOS Revision 1007"),
1420 },
1421 },
1422 {
1423 /*
1424 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1425 * for LPC bridge, which is needed for the PCI
1426 * interrupt links to work. DSDT fix is in bug 5966.
1427 * 2645, 2646 model numbers are shared with 600/600E/600X
1428 */
1429 .callback = disable_acpi_irq,
1430 .ident = "IBM Thinkpad 600 Series 2645",
1431 .matches = {
1432 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1433 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1434 },
1435 },
1436 {
1437 .callback = disable_acpi_irq,
1438 .ident = "IBM Thinkpad 600 Series 2646",
1439 .matches = {
1440 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1441 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1442 },
1443 },
1444 /*
1445 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1446 */
1447 { /* _BBN 0 bug */
1448 .callback = disable_acpi_pci,
1449 .ident = "ASUS PR-DLS",
1450 .matches = {
1451 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1452 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1453 DMI_MATCH(DMI_BIOS_VERSION,
1454 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1455 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1456 },
1457 },
1458 {
1459 .callback = disable_acpi_pci,
1460 .ident = "Acer TravelMate 36x Laptop",
1461 .matches = {
1462 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1463 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1464 },
1465 },
1466 {}
1467};
1468
1469/* second table for DMI checks that should run after early-quirks */
1470static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1471 /*
1472 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1473 * which includes some code which overrides all temperature
1474 * trip points to 16C if the INTIN2 input of the I/O APIC
1475 * is enabled. This input is incorrectly designated the
1476 * ISA IRQ 0 via an interrupt source override even though
1477 * it is wired to the output of the master 8259A and INTIN0
1478 * is not connected at all. Force ignoring BIOS IRQ0
1479 * override in that cases.
1480 */
1481 {
1482 .callback = dmi_ignore_irq0_timer_override,
1483 .ident = "HP nx6115 laptop",
1484 .matches = {
1485 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1486 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1487 },
1488 },
1489 {
1490 .callback = dmi_ignore_irq0_timer_override,
1491 .ident = "HP NX6125 laptop",
1492 .matches = {
1493 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1494 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1495 },
1496 },
1497 {
1498 .callback = dmi_ignore_irq0_timer_override,
1499 .ident = "HP NX6325 laptop",
1500 .matches = {
1501 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1502 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1503 },
1504 },
1505 {
1506 .callback = dmi_ignore_irq0_timer_override,
1507 .ident = "HP 6715b laptop",
1508 .matches = {
1509 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1510 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1511 },
1512 },
1513 {
1514 .callback = dmi_ignore_irq0_timer_override,
1515 .ident = "FUJITSU SIEMENS",
1516 .matches = {
1517 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1518 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1519 },
1520 },
1521 {}
1522};
1523
1524/*
1525 * acpi_boot_table_init() and acpi_boot_init()
1526 * called from setup_arch(), always.
1527 * 1. checksums all tables
1528 * 2. enumerates lapics
1529 * 3. enumerates io-apics
1530 *
1531 * acpi_table_init() is separate to allow reading SRAT without
1532 * other side effects.
1533 *
1534 * side effects of acpi_boot_init:
1535 * acpi_lapic = 1 if LAPIC found
1536 * acpi_ioapic = 1 if IOAPIC found
1537 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1538 * if acpi_blacklisted() acpi_disabled = 1;
1539 * acpi_irq_model=...
1540 * ...
1541 */
1542
1543void __init acpi_boot_table_init(void)
1544{
1545 dmi_check_system(acpi_dmi_table);
1546
1547 /*
1548 * If acpi_disabled, bail out
1549 */
1550 if (acpi_disabled)
1551 return;
1552
1553 /*
1554 * Initialize the ACPI boot-time table parser.
1555 */
1556 if (acpi_table_init()) {
1557 disable_acpi();
1558 return;
1559 }
1560
1561 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1562
1563 /*
1564 * blacklist may disable ACPI entirely
1565 */
1566 if (acpi_blacklisted()) {
1567 if (acpi_force) {
1568 printk(KERN_WARNING PREFIX "acpi=force override\n");
1569 } else {
1570 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1571 disable_acpi();
1572 return;
1573 }
1574 }
1575}
1576
1577int __init early_acpi_boot_init(void)
1578{
1579 /*
1580 * If acpi_disabled, bail out
1581 */
1582 if (acpi_disabled)
1583 return 1;
1584
1585 /*
1586 * Process the Multiple APIC Description Table (MADT), if present
1587 */
1588 early_acpi_process_madt();
1589
1590 /*
1591 * Hardware-reduced ACPI mode initialization:
1592 */
1593 acpi_reduced_hw_init();
1594
1595 return 0;
1596}
1597
1598int __init acpi_boot_init(void)
1599{
1600 /* those are executed after early-quirks are executed */
1601 dmi_check_system(acpi_dmi_table_late);
1602
1603 /*
1604 * If acpi_disabled, bail out
1605 */
1606 if (acpi_disabled)
1607 return 1;
1608
1609 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1610
1611 /*
1612 * set sci_int and PM timer address
1613 */
1614 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1615
1616 /*
1617 * Process the Multiple APIC Description Table (MADT), if present
1618 */
1619 acpi_process_madt();
1620
1621 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1622 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1623 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1624
1625 if (!acpi_noirq)
1626 x86_init.pci.init = pci_acpi_init;
1627
1628 /* Do not enable ACPI SPCR console by default */
1629 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1630 return 0;
1631}
1632
1633static int __init parse_acpi(char *arg)
1634{
1635 if (!arg)
1636 return -EINVAL;
1637
1638 /* "acpi=off" disables both ACPI table parsing and interpreter */
1639 if (strcmp(arg, "off") == 0) {
1640 disable_acpi();
1641 }
1642 /* acpi=force to over-ride black-list */
1643 else if (strcmp(arg, "force") == 0) {
1644 acpi_force = 1;
1645 acpi_disabled = 0;
1646 }
1647 /* acpi=strict disables out-of-spec workarounds */
1648 else if (strcmp(arg, "strict") == 0) {
1649 acpi_strict = 1;
1650 }
1651 /* acpi=rsdt use RSDT instead of XSDT */
1652 else if (strcmp(arg, "rsdt") == 0) {
1653 acpi_gbl_do_not_use_xsdt = TRUE;
1654 }
1655 /* "acpi=noirq" disables ACPI interrupt routing */
1656 else if (strcmp(arg, "noirq") == 0) {
1657 acpi_noirq_set();
1658 }
1659 /* "acpi=copy_dsdt" copys DSDT */
1660 else if (strcmp(arg, "copy_dsdt") == 0) {
1661 acpi_gbl_copy_dsdt_locally = 1;
1662 }
1663 /* "acpi=nocmcff" disables FF mode for corrected errors */
1664 else if (strcmp(arg, "nocmcff") == 0) {
1665 acpi_disable_cmcff = 1;
1666 } else {
1667 /* Core will printk when we return error. */
1668 return -EINVAL;
1669 }
1670 return 0;
1671}
1672early_param("acpi", parse_acpi);
1673
1674/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1675static int __init parse_pci(char *arg)
1676{
1677 if (arg && strcmp(arg, "noacpi") == 0)
1678 acpi_disable_pci();
1679 return 0;
1680}
1681early_param("pci", parse_pci);
1682
1683int __init acpi_mps_check(void)
1684{
1685#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1686/* mptable code is not built-in*/
1687 if (acpi_disabled || acpi_noirq) {
1688 printk(KERN_WARNING "MPS support code is not built-in.\n"
1689 "Using acpi=off or acpi=noirq or pci=noacpi "
1690 "may have problem\n");
1691 return 1;
1692 }
1693#endif
1694 return 0;
1695}
1696
1697#ifdef CONFIG_X86_IO_APIC
1698static int __init parse_acpi_skip_timer_override(char *arg)
1699{
1700 acpi_skip_timer_override = 1;
1701 return 0;
1702}
1703early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1704
1705static int __init parse_acpi_use_timer_override(char *arg)
1706{
1707 acpi_use_timer_override = 1;
1708 return 0;
1709}
1710early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1711#endif /* CONFIG_X86_IO_APIC */
1712
1713static int __init setup_acpi_sci(char *s)
1714{
1715 if (!s)
1716 return -EINVAL;
1717 if (!strcmp(s, "edge"))
1718 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1719 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1720 else if (!strcmp(s, "level"))
1721 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1722 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1723 else if (!strcmp(s, "high"))
1724 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1725 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1726 else if (!strcmp(s, "low"))
1727 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1728 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1729 else
1730 return -EINVAL;
1731 return 0;
1732}
1733early_param("acpi_sci", setup_acpi_sci);
1734
1735int __acpi_acquire_global_lock(unsigned int *lock)
1736{
1737 unsigned int old, new, val;
1738 do {
1739 old = *lock;
1740 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1741 val = cmpxchg(lock, old, new);
1742 } while (unlikely (val != old));
1743 return (new < 3) ? -1 : 0;
1744}
1745
1746int __acpi_release_global_lock(unsigned int *lock)
1747{
1748 unsigned int old, new, val;
1749 do {
1750 old = *lock;
1751 new = old & ~0x3;
1752 val = cmpxchg(lock, old, new);
1753 } while (unlikely (val != old));
1754 return old & 0x1;
1755}
1756
1757void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1758{
1759 e820__range_add(addr, size, E820_TYPE_ACPI);
1760 e820__update_table_print();
1761}
1762
1763void x86_default_set_root_pointer(u64 addr)
1764{
1765 boot_params.acpi_rsdp_addr = addr;
1766}
1767
1768u64 x86_default_get_root_pointer(void)
1769{
1770 return boot_params.acpi_rsdp_addr;
1771}
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}