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