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[mirror_ubuntu-bionic-kernel.git] / arch / x86 / kernel / acpi / boot.c
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 #include <linux/efi-bgrt.h>
39
40 #include <asm/irqdomain.h>
41 #include <asm/pci_x86.h>
42 #include <asm/pgtable.h>
43 #include <asm/io_apic.h>
44 #include <asm/apic.h>
45 #include <asm/io.h>
46 #include <asm/mpspec.h>
47 #include <asm/smp.h>
48 #include <asm/i8259.h>
49
50 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
51 static int __initdata acpi_force = 0;
52 int acpi_disabled;
53 EXPORT_SYMBOL(acpi_disabled);
54
55 #ifdef CONFIG_X86_64
56 # include <asm/proto.h>
57 #endif /* X86 */
58
59 #define PREFIX "ACPI: "
60
61 int acpi_noirq; /* skip ACPI IRQ initialization */
62 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
63 EXPORT_SYMBOL(acpi_pci_disabled);
64
65 int acpi_lapic;
66 int acpi_ioapic;
67 int acpi_strict;
68 int acpi_disable_cmcff;
69
70 u8 acpi_sci_flags __initdata;
71 int acpi_sci_override_gsi __initdata;
72 int acpi_skip_timer_override __initdata;
73 int acpi_use_timer_override __initdata;
74 int acpi_fix_pin2_polarity __initdata;
75
76 #ifdef CONFIG_X86_LOCAL_APIC
77 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
78 #endif
79
80 #ifdef CONFIG_X86_IO_APIC
81 /*
82 * Locks related to IOAPIC hotplug
83 * Hotplug side:
84 * ->device_hotplug_lock
85 * ->acpi_ioapic_lock
86 * ->ioapic_lock
87 * Interrupt mapping side:
88 * ->acpi_ioapic_lock
89 * ->ioapic_mutex
90 * ->ioapic_lock
91 */
92 static DEFINE_MUTEX(acpi_ioapic_lock);
93 #endif
94
95 /* --------------------------------------------------------------------------
96 Boot-time Configuration
97 -------------------------------------------------------------------------- */
98
99 /*
100 * The default interrupt routing model is PIC (8259). This gets
101 * overridden if IOAPICs are enumerated (below).
102 */
103 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
104
105
106 /*
107 * ISA irqs by default are the first 16 gsis but can be
108 * any gsi as specified by an interrupt source override.
109 */
110 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
111 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
112 };
113
114 #define ACPI_INVALID_GSI INT_MIN
115
116 /*
117 * This is just a simple wrapper around early_ioremap(),
118 * with sanity checks for phys == 0 and size == 0.
119 */
120 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
121 {
122
123 if (!phys || !size)
124 return NULL;
125
126 return early_ioremap(phys, size);
127 }
128
129 void __init __acpi_unmap_table(char *map, unsigned long size)
130 {
131 if (!map || !size)
132 return;
133
134 early_iounmap(map, size);
135 }
136
137 #ifdef CONFIG_X86_LOCAL_APIC
138 static int __init acpi_parse_madt(struct acpi_table_header *table)
139 {
140 struct acpi_table_madt *madt = NULL;
141
142 if (!boot_cpu_has(X86_FEATURE_APIC))
143 return -EINVAL;
144
145 madt = (struct acpi_table_madt *)table;
146 if (!madt) {
147 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
148 return -ENODEV;
149 }
150
151 if (madt->address) {
152 acpi_lapic_addr = (u64) madt->address;
153
154 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
155 madt->address);
156 }
157
158 default_acpi_madt_oem_check(madt->header.oem_id,
159 madt->header.oem_table_id);
160
161 return 0;
162 }
163
164 /**
165 * acpi_register_lapic - register a local apic and generates a logic cpu number
166 * @id: local apic id to register
167 * @acpiid: ACPI id to register
168 * @enabled: this cpu is enabled or not
169 *
170 * Returns the logic cpu number which maps to the local apic
171 */
172 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
173 {
174 unsigned int ver = 0;
175 int cpu;
176
177 if (id >= MAX_LOCAL_APIC) {
178 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
179 return -EINVAL;
180 }
181
182 if (boot_cpu_physical_apicid != -1U)
183 ver = boot_cpu_apic_version;
184
185 cpu = __generic_processor_info(id, ver, enabled);
186 if (cpu >= 0)
187 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
188
189 return cpu;
190 }
191
192 static int __init
193 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
194 {
195 struct acpi_madt_local_x2apic *processor = NULL;
196 int apic_id;
197 u8 enabled;
198
199 processor = (struct acpi_madt_local_x2apic *)header;
200
201 if (BAD_MADT_ENTRY(processor, end))
202 return -EINVAL;
203
204 acpi_table_print_madt_entry(header);
205
206 apic_id = processor->local_apic_id;
207 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
208 #ifdef CONFIG_X86_X2APIC
209 /*
210 * We need to register disabled CPU as well to permit
211 * counting disabled CPUs. This allows us to size
212 * cpus_possible_map more accurately, to permit
213 * to not preallocating memory for all NR_CPUS
214 * when we use CPU hotplug.
215 */
216 if (!apic->apic_id_valid(apic_id) && enabled)
217 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
218 else
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
227 static int __init
228 acpi_parse_lapic(struct acpi_subtable_header * 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);
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
257 static int __init
258 acpi_parse_sapic(struct acpi_subtable_header *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);
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
276 static int __init
277 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * 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);
288
289 acpi_lapic_addr = lapic_addr_ovr->address;
290
291 return 0;
292 }
293
294 static int __init
295 acpi_parse_x2apic_nmi(struct acpi_subtable_header *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);
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
313 static int __init
314 acpi_parse_lapic_nmi(struct acpi_subtable_header * 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);
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
336 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
337 u32 gsi)
338 {
339 int ioapic;
340 int pin;
341 struct mpc_intsrc mp_irq;
342
343 /*
344 * Convert 'gsi' to 'ioapic.pin'.
345 */
346 ioapic = mp_find_ioapic(gsi);
347 if (ioapic < 0)
348 return;
349 pin = mp_find_ioapic_pin(ioapic, gsi);
350
351 /*
352 * TBD: This check is for faulty timer entries, where the override
353 * erroneously sets the trigger to level, resulting in a HUGE
354 * increase of timer interrupts!
355 */
356 if ((bus_irq == 0) && (trigger == 3))
357 trigger = 1;
358
359 mp_irq.type = MP_INTSRC;
360 mp_irq.irqtype = mp_INT;
361 mp_irq.irqflag = (trigger << 2) | polarity;
362 mp_irq.srcbus = MP_ISA_BUS;
363 mp_irq.srcbusirq = bus_irq; /* IRQ */
364 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
365 mp_irq.dstirq = pin; /* INTIN# */
366
367 mp_save_irq(&mp_irq);
368
369 /*
370 * Reset default identity mapping if gsi is also an legacy IRQ,
371 * otherwise there will be more than one entry with the same GSI
372 * and acpi_isa_irq_to_gsi() may give wrong result.
373 */
374 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
375 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
376 isa_irq_to_gsi[bus_irq] = gsi;
377 }
378
379 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
380 int polarity)
381 {
382 #ifdef CONFIG_X86_MPPARSE
383 struct mpc_intsrc mp_irq;
384 struct pci_dev *pdev;
385 unsigned char number;
386 unsigned int devfn;
387 int ioapic;
388 u8 pin;
389
390 if (!acpi_ioapic)
391 return 0;
392 if (!dev || !dev_is_pci(dev))
393 return 0;
394
395 pdev = to_pci_dev(dev);
396 number = pdev->bus->number;
397 devfn = pdev->devfn;
398 pin = pdev->pin;
399 /* print the entry should happen on mptable identically */
400 mp_irq.type = MP_INTSRC;
401 mp_irq.irqtype = mp_INT;
402 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
403 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
404 mp_irq.srcbus = number;
405 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
406 ioapic = mp_find_ioapic(gsi);
407 mp_irq.dstapic = mpc_ioapic_id(ioapic);
408 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
409
410 mp_save_irq(&mp_irq);
411 #endif
412 return 0;
413 }
414
415 static int __init
416 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
417 {
418 struct acpi_madt_io_apic *ioapic = NULL;
419 struct ioapic_domain_cfg cfg = {
420 .type = IOAPIC_DOMAIN_DYNAMIC,
421 .ops = &mp_ioapic_irqdomain_ops,
422 };
423
424 ioapic = (struct acpi_madt_io_apic *)header;
425
426 if (BAD_MADT_ENTRY(ioapic, end))
427 return -EINVAL;
428
429 acpi_table_print_madt_entry(header);
430
431 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
432 if (ioapic->global_irq_base < nr_legacy_irqs())
433 cfg.type = IOAPIC_DOMAIN_LEGACY;
434
435 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
436 &cfg);
437
438 return 0;
439 }
440
441 /*
442 * Parse Interrupt Source Override for the ACPI SCI
443 */
444 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
445 {
446 if (trigger == 0) /* compatible SCI trigger is level */
447 trigger = 3;
448
449 if (polarity == 0) /* compatible SCI polarity is low */
450 polarity = 3;
451
452 /* Command-line over-ride via acpi_sci= */
453 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
454 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
455
456 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
457 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
458
459 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
460 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
461
462 /*
463 * stash over-ride to indicate we've been here
464 * and for later update of acpi_gbl_FADT
465 */
466 acpi_sci_override_gsi = gsi;
467 return;
468 }
469
470 static int __init
471 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
472 const unsigned long end)
473 {
474 struct acpi_madt_interrupt_override *intsrc = NULL;
475
476 intsrc = (struct acpi_madt_interrupt_override *)header;
477
478 if (BAD_MADT_ENTRY(intsrc, end))
479 return -EINVAL;
480
481 acpi_table_print_madt_entry(header);
482
483 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
484 acpi_sci_ioapic_setup(intsrc->source_irq,
485 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
486 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
487 intsrc->global_irq);
488 return 0;
489 }
490
491 if (intsrc->source_irq == 0) {
492 if (acpi_skip_timer_override) {
493 printk(PREFIX "BIOS IRQ0 override ignored.\n");
494 return 0;
495 }
496
497 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
498 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
499 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
500 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
501 }
502 }
503
504 mp_override_legacy_irq(intsrc->source_irq,
505 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
506 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
507 intsrc->global_irq);
508
509 return 0;
510 }
511
512 static int __init
513 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
514 {
515 struct acpi_madt_nmi_source *nmi_src = NULL;
516
517 nmi_src = (struct acpi_madt_nmi_source *)header;
518
519 if (BAD_MADT_ENTRY(nmi_src, end))
520 return -EINVAL;
521
522 acpi_table_print_madt_entry(header);
523
524 /* TBD: Support nimsrc entries? */
525
526 return 0;
527 }
528
529 #endif /* CONFIG_X86_IO_APIC */
530
531 /*
532 * acpi_pic_sci_set_trigger()
533 *
534 * use ELCR to set PIC-mode trigger type for SCI
535 *
536 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
537 * it may require Edge Trigger -- use "acpi_sci=edge"
538 *
539 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
540 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
541 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
542 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
543 */
544
545 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
546 {
547 unsigned int mask = 1 << irq;
548 unsigned int old, new;
549
550 /* Real old ELCR mask */
551 old = inb(0x4d0) | (inb(0x4d1) << 8);
552
553 /*
554 * If we use ACPI to set PCI IRQs, then we should clear ELCR
555 * since we will set it correctly as we enable the PCI irq
556 * routing.
557 */
558 new = acpi_noirq ? old : 0;
559
560 /*
561 * Update SCI information in the ELCR, it isn't in the PCI
562 * routing tables..
563 */
564 switch (trigger) {
565 case 1: /* Edge - clear */
566 new &= ~mask;
567 break;
568 case 3: /* Level - set */
569 new |= mask;
570 break;
571 }
572
573 if (old == new)
574 return;
575
576 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
577 outb(new, 0x4d0);
578 outb(new >> 8, 0x4d1);
579 }
580
581 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
582 {
583 int rc, irq, trigger, polarity;
584
585 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
586 *irqp = gsi;
587 return 0;
588 }
589
590 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
591 if (rc == 0) {
592 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
593 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
594 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
595 if (irq >= 0) {
596 *irqp = irq;
597 return 0;
598 }
599 }
600
601 return -1;
602 }
603 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
604
605 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
606 {
607 if (isa_irq < nr_legacy_irqs() &&
608 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
609 *gsi = isa_irq_to_gsi[isa_irq];
610 return 0;
611 }
612
613 return -1;
614 }
615
616 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
617 int trigger, int polarity)
618 {
619 #ifdef CONFIG_PCI
620 /*
621 * Make sure all (legacy) PCI IRQs are set as level-triggered.
622 */
623 if (trigger == ACPI_LEVEL_SENSITIVE)
624 elcr_set_level_irq(gsi);
625 #endif
626
627 return gsi;
628 }
629
630 #ifdef CONFIG_X86_LOCAL_APIC
631 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
632 int trigger, int polarity)
633 {
634 int irq = gsi;
635 #ifdef CONFIG_X86_IO_APIC
636 int node;
637 struct irq_alloc_info info;
638
639 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
640 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
641 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
642 ioapic_set_alloc_attr(&info, node, trigger, polarity);
643
644 mutex_lock(&acpi_ioapic_lock);
645 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
646 /* Don't set up the ACPI SCI because it's already set up */
647 if (irq >= 0 && enable_update_mptable &&
648 acpi_gbl_FADT.sci_interrupt != gsi)
649 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
650 mutex_unlock(&acpi_ioapic_lock);
651 #endif
652
653 return irq;
654 }
655
656 static void acpi_unregister_gsi_ioapic(u32 gsi)
657 {
658 #ifdef CONFIG_X86_IO_APIC
659 int irq;
660
661 mutex_lock(&acpi_ioapic_lock);
662 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
663 if (irq > 0)
664 mp_unmap_irq(irq);
665 mutex_unlock(&acpi_ioapic_lock);
666 #endif
667 }
668 #endif
669
670 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
671 int trigger, int polarity) = acpi_register_gsi_pic;
672 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
673
674 #ifdef CONFIG_ACPI_SLEEP
675 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
676 #else
677 int (*acpi_suspend_lowlevel)(void);
678 #endif
679
680 /*
681 * success: return IRQ number (>=0)
682 * failure: return < 0
683 */
684 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
685 {
686 return __acpi_register_gsi(dev, gsi, trigger, polarity);
687 }
688 EXPORT_SYMBOL_GPL(acpi_register_gsi);
689
690 void acpi_unregister_gsi(u32 gsi)
691 {
692 if (__acpi_unregister_gsi)
693 __acpi_unregister_gsi(gsi);
694 }
695 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
696
697 #ifdef CONFIG_X86_LOCAL_APIC
698 static void __init acpi_set_irq_model_ioapic(void)
699 {
700 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
701 __acpi_register_gsi = acpi_register_gsi_ioapic;
702 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
703 acpi_ioapic = 1;
704 }
705 #endif
706
707 /*
708 * ACPI based hotplug support for CPU
709 */
710 #ifdef CONFIG_ACPI_HOTPLUG_CPU
711 #include <acpi/processor.h>
712
713 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
714 {
715 #ifdef CONFIG_ACPI_NUMA
716 int nid;
717
718 nid = acpi_get_node(handle);
719 if (nid != NUMA_NO_NODE) {
720 set_apicid_to_node(physid, nid);
721 numa_set_node(cpu, nid);
722 }
723 #endif
724 return 0;
725 }
726
727 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
728 int *pcpu)
729 {
730 int cpu;
731
732 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
733 if (cpu < 0) {
734 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
735 return cpu;
736 }
737
738 acpi_processor_set_pdc(handle);
739 acpi_map_cpu2node(handle, cpu, physid);
740
741 *pcpu = cpu;
742 return 0;
743 }
744 EXPORT_SYMBOL(acpi_map_cpu);
745
746 int acpi_unmap_cpu(int cpu)
747 {
748 #ifdef CONFIG_ACPI_NUMA
749 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
750 #endif
751
752 per_cpu(x86_cpu_to_apicid, cpu) = -1;
753 set_cpu_present(cpu, false);
754 num_processors--;
755
756 return (0);
757 }
758 EXPORT_SYMBOL(acpi_unmap_cpu);
759 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
760
761 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
762 {
763 int ret = -ENOSYS;
764 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
765 int ioapic_id;
766 u64 addr;
767 struct ioapic_domain_cfg cfg = {
768 .type = IOAPIC_DOMAIN_DYNAMIC,
769 .ops = &mp_ioapic_irqdomain_ops,
770 };
771
772 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
773 if (ioapic_id < 0) {
774 unsigned long long uid;
775 acpi_status status;
776
777 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
778 NULL, &uid);
779 if (ACPI_FAILURE(status)) {
780 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
781 return -EINVAL;
782 }
783 ioapic_id = (int)uid;
784 }
785
786 mutex_lock(&acpi_ioapic_lock);
787 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
788 mutex_unlock(&acpi_ioapic_lock);
789 #endif
790
791 return ret;
792 }
793 EXPORT_SYMBOL(acpi_register_ioapic);
794
795 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
796 {
797 int ret = -ENOSYS;
798
799 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
800 mutex_lock(&acpi_ioapic_lock);
801 ret = mp_unregister_ioapic(gsi_base);
802 mutex_unlock(&acpi_ioapic_lock);
803 #endif
804
805 return ret;
806 }
807 EXPORT_SYMBOL(acpi_unregister_ioapic);
808
809 /**
810 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
811 * has been registered
812 * @handle: ACPI handle of the IOAPIC deivce
813 * @gsi_base: GSI base associated with the IOAPIC
814 *
815 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
816 * with acpi_register_ioapic()/acpi_unregister_ioapic().
817 */
818 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
819 {
820 int ret = 0;
821
822 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
823 mutex_lock(&acpi_ioapic_lock);
824 ret = mp_ioapic_registered(gsi_base);
825 mutex_unlock(&acpi_ioapic_lock);
826 #endif
827
828 return ret;
829 }
830
831 static int __init acpi_parse_sbf(struct acpi_table_header *table)
832 {
833 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
834
835 sbf_port = sb->cmos_index; /* Save CMOS port */
836
837 return 0;
838 }
839
840 #ifdef CONFIG_HPET_TIMER
841 #include <asm/hpet.h>
842
843 static struct resource *hpet_res __initdata;
844
845 static int __init acpi_parse_hpet(struct acpi_table_header *table)
846 {
847 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
848
849 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
850 printk(KERN_WARNING PREFIX "HPET timers must be located in "
851 "memory.\n");
852 return -1;
853 }
854
855 hpet_address = hpet_tbl->address.address;
856 hpet_blockid = hpet_tbl->sequence;
857
858 /*
859 * Some broken BIOSes advertise HPET at 0x0. We really do not
860 * want to allocate a resource there.
861 */
862 if (!hpet_address) {
863 printk(KERN_WARNING PREFIX
864 "HPET id: %#x base: %#lx is invalid\n",
865 hpet_tbl->id, hpet_address);
866 return 0;
867 }
868 #ifdef CONFIG_X86_64
869 /*
870 * Some even more broken BIOSes advertise HPET at
871 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
872 * some noise:
873 */
874 if (hpet_address == 0xfed0000000000000UL) {
875 if (!hpet_force_user) {
876 printk(KERN_WARNING PREFIX "HPET id: %#x "
877 "base: 0xfed0000000000000 is bogus\n "
878 "try hpet=force on the kernel command line to "
879 "fix it up to 0xfed00000.\n", hpet_tbl->id);
880 hpet_address = 0;
881 return 0;
882 }
883 printk(KERN_WARNING PREFIX
884 "HPET id: %#x base: 0xfed0000000000000 fixed up "
885 "to 0xfed00000.\n", hpet_tbl->id);
886 hpet_address >>= 32;
887 }
888 #endif
889 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
890 hpet_tbl->id, hpet_address);
891
892 /*
893 * Allocate and initialize the HPET firmware resource for adding into
894 * the resource tree during the lateinit timeframe.
895 */
896 #define HPET_RESOURCE_NAME_SIZE 9
897 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
898
899 hpet_res->name = (void *)&hpet_res[1];
900 hpet_res->flags = IORESOURCE_MEM;
901 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
902 hpet_tbl->sequence);
903
904 hpet_res->start = hpet_address;
905 hpet_res->end = hpet_address + (1 * 1024) - 1;
906
907 return 0;
908 }
909
910 /*
911 * hpet_insert_resource inserts the HPET resources used into the resource
912 * tree.
913 */
914 static __init int hpet_insert_resource(void)
915 {
916 if (!hpet_res)
917 return 1;
918
919 return insert_resource(&iomem_resource, hpet_res);
920 }
921
922 late_initcall(hpet_insert_resource);
923
924 #else
925 #define acpi_parse_hpet NULL
926 #endif
927
928 static int __init acpi_parse_fadt(struct acpi_table_header *table)
929 {
930 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
931 pr_debug("ACPI: no legacy devices present\n");
932 x86_platform.legacy.devices.pnpbios = 0;
933 }
934
935 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
936 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
937 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
938 pr_debug("ACPI: i8042 controller is absent\n");
939 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
940 }
941
942 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
943 pr_debug("ACPI: not registering RTC platform device\n");
944 x86_platform.legacy.rtc = 0;
945 }
946
947 #ifdef CONFIG_X86_PM_TIMER
948 /* detect the location of the ACPI PM Timer */
949 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
950 /* FADT rev. 2 */
951 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
952 ACPI_ADR_SPACE_SYSTEM_IO)
953 return 0;
954
955 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
956 /*
957 * "X" fields are optional extensions to the original V1.0
958 * fields, so we must selectively expand V1.0 fields if the
959 * corresponding X field is zero.
960 */
961 if (!pmtmr_ioport)
962 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
963 } else {
964 /* FADT rev. 1 */
965 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
966 }
967 if (pmtmr_ioport)
968 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
969 pmtmr_ioport);
970 #endif
971 return 0;
972 }
973
974 #ifdef CONFIG_X86_LOCAL_APIC
975 /*
976 * Parse LAPIC entries in MADT
977 * returns 0 on success, < 0 on error
978 */
979
980 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
981 {
982 int count;
983
984 if (!boot_cpu_has(X86_FEATURE_APIC))
985 return -ENODEV;
986
987 /*
988 * Note that the LAPIC address is obtained from the MADT (32-bit value)
989 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
990 */
991
992 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
993 acpi_parse_lapic_addr_ovr, 0);
994 if (count < 0) {
995 printk(KERN_ERR PREFIX
996 "Error parsing LAPIC address override entry\n");
997 return count;
998 }
999
1000 register_lapic_address(acpi_lapic_addr);
1001
1002 return count;
1003 }
1004
1005 static int __init acpi_parse_madt_lapic_entries(void)
1006 {
1007 int count;
1008 int x2count = 0;
1009 int ret;
1010 struct acpi_subtable_proc madt_proc[2];
1011
1012 if (!boot_cpu_has(X86_FEATURE_APIC))
1013 return -ENODEV;
1014
1015 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1016 acpi_parse_sapic, MAX_LOCAL_APIC);
1017
1018 if (!count) {
1019 memset(madt_proc, 0, sizeof(madt_proc));
1020 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1021 madt_proc[0].handler = acpi_parse_lapic;
1022 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1023 madt_proc[1].handler = acpi_parse_x2apic;
1024 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1025 sizeof(struct acpi_table_madt),
1026 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1027 if (ret < 0) {
1028 printk(KERN_ERR PREFIX
1029 "Error parsing LAPIC/X2APIC entries\n");
1030 return ret;
1031 }
1032
1033 count = madt_proc[0].count;
1034 x2count = madt_proc[1].count;
1035 }
1036 if (!count && !x2count) {
1037 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1038 /* TBD: Cleanup to allow fallback to MPS */
1039 return -ENODEV;
1040 } else if (count < 0 || x2count < 0) {
1041 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1042 /* TBD: Cleanup to allow fallback to MPS */
1043 return count;
1044 }
1045
1046 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1047 acpi_parse_x2apic_nmi, 0);
1048 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1049 acpi_parse_lapic_nmi, 0);
1050 if (count < 0 || x2count < 0) {
1051 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1052 /* TBD: Cleanup to allow fallback to MPS */
1053 return count;
1054 }
1055 return 0;
1056 }
1057 #endif /* CONFIG_X86_LOCAL_APIC */
1058
1059 #ifdef CONFIG_X86_IO_APIC
1060 static void __init mp_config_acpi_legacy_irqs(void)
1061 {
1062 int i;
1063 struct mpc_intsrc mp_irq;
1064
1065 #ifdef CONFIG_EISA
1066 /*
1067 * Fabricate the legacy ISA bus (bus #31).
1068 */
1069 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1070 #endif
1071 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1072 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1073
1074 /*
1075 * Use the default configuration for the IRQs 0-15. Unless
1076 * overridden by (MADT) interrupt source override entries.
1077 */
1078 for (i = 0; i < nr_legacy_irqs(); i++) {
1079 int ioapic, pin;
1080 unsigned int dstapic;
1081 int idx;
1082 u32 gsi;
1083
1084 /* Locate the gsi that irq i maps to. */
1085 if (acpi_isa_irq_to_gsi(i, &gsi))
1086 continue;
1087
1088 /*
1089 * Locate the IOAPIC that manages the ISA IRQ.
1090 */
1091 ioapic = mp_find_ioapic(gsi);
1092 if (ioapic < 0)
1093 continue;
1094 pin = mp_find_ioapic_pin(ioapic, gsi);
1095 dstapic = mpc_ioapic_id(ioapic);
1096
1097 for (idx = 0; idx < mp_irq_entries; idx++) {
1098 struct mpc_intsrc *irq = mp_irqs + idx;
1099
1100 /* Do we already have a mapping for this ISA IRQ? */
1101 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1102 break;
1103
1104 /* Do we already have a mapping for this IOAPIC pin */
1105 if (irq->dstapic == dstapic && irq->dstirq == pin)
1106 break;
1107 }
1108
1109 if (idx != mp_irq_entries) {
1110 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1111 continue; /* IRQ already used */
1112 }
1113
1114 mp_irq.type = MP_INTSRC;
1115 mp_irq.irqflag = 0; /* Conforming */
1116 mp_irq.srcbus = MP_ISA_BUS;
1117 mp_irq.dstapic = dstapic;
1118 mp_irq.irqtype = mp_INT;
1119 mp_irq.srcbusirq = i; /* Identity mapped */
1120 mp_irq.dstirq = pin;
1121
1122 mp_save_irq(&mp_irq);
1123 }
1124 }
1125
1126 /*
1127 * Parse IOAPIC related entries in MADT
1128 * returns 0 on success, < 0 on error
1129 */
1130 static int __init acpi_parse_madt_ioapic_entries(void)
1131 {
1132 int count;
1133
1134 /*
1135 * ACPI interpreter is required to complete interrupt setup,
1136 * so if it is off, don't enumerate the io-apics with ACPI.
1137 * If MPS is present, it will handle them,
1138 * otherwise the system will stay in PIC mode
1139 */
1140 if (acpi_disabled || acpi_noirq)
1141 return -ENODEV;
1142
1143 if (!boot_cpu_has(X86_FEATURE_APIC))
1144 return -ENODEV;
1145
1146 /*
1147 * if "noapic" boot option, don't look for IO-APICs
1148 */
1149 if (skip_ioapic_setup) {
1150 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1151 "due to 'noapic' option.\n");
1152 return -ENODEV;
1153 }
1154
1155 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1156 MAX_IO_APICS);
1157 if (!count) {
1158 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1159 return -ENODEV;
1160 } else if (count < 0) {
1161 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1162 return count;
1163 }
1164
1165 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1166 acpi_parse_int_src_ovr, nr_irqs);
1167 if (count < 0) {
1168 printk(KERN_ERR PREFIX
1169 "Error parsing interrupt source overrides entry\n");
1170 /* TBD: Cleanup to allow fallback to MPS */
1171 return count;
1172 }
1173
1174 /*
1175 * If BIOS did not supply an INT_SRC_OVR for the SCI
1176 * pretend we got one so we can set the SCI flags.
1177 */
1178 if (!acpi_sci_override_gsi)
1179 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1180 acpi_gbl_FADT.sci_interrupt);
1181
1182 /* Fill in identity legacy mappings where no override */
1183 mp_config_acpi_legacy_irqs();
1184
1185 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1186 acpi_parse_nmi_src, nr_irqs);
1187 if (count < 0) {
1188 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1189 /* TBD: Cleanup to allow fallback to MPS */
1190 return count;
1191 }
1192
1193 return 0;
1194 }
1195 #else
1196 static inline int acpi_parse_madt_ioapic_entries(void)
1197 {
1198 return -1;
1199 }
1200 #endif /* !CONFIG_X86_IO_APIC */
1201
1202 static void __init early_acpi_process_madt(void)
1203 {
1204 #ifdef CONFIG_X86_LOCAL_APIC
1205 int error;
1206
1207 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1208
1209 /*
1210 * Parse MADT LAPIC entries
1211 */
1212 error = early_acpi_parse_madt_lapic_addr_ovr();
1213 if (!error) {
1214 acpi_lapic = 1;
1215 smp_found_config = 1;
1216 }
1217 if (error == -EINVAL) {
1218 /*
1219 * Dell Precision Workstation 410, 610 come here.
1220 */
1221 printk(KERN_ERR PREFIX
1222 "Invalid BIOS MADT, disabling ACPI\n");
1223 disable_acpi();
1224 }
1225 }
1226 #endif
1227 }
1228
1229 static void __init acpi_process_madt(void)
1230 {
1231 #ifdef CONFIG_X86_LOCAL_APIC
1232 int error;
1233
1234 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1235
1236 /*
1237 * Parse MADT LAPIC entries
1238 */
1239 error = acpi_parse_madt_lapic_entries();
1240 if (!error) {
1241 acpi_lapic = 1;
1242
1243 /*
1244 * Parse MADT IO-APIC entries
1245 */
1246 mutex_lock(&acpi_ioapic_lock);
1247 error = acpi_parse_madt_ioapic_entries();
1248 mutex_unlock(&acpi_ioapic_lock);
1249 if (!error) {
1250 acpi_set_irq_model_ioapic();
1251
1252 smp_found_config = 1;
1253 }
1254 }
1255 if (error == -EINVAL) {
1256 /*
1257 * Dell Precision Workstation 410, 610 come here.
1258 */
1259 printk(KERN_ERR PREFIX
1260 "Invalid BIOS MADT, disabling ACPI\n");
1261 disable_acpi();
1262 }
1263 } else {
1264 /*
1265 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1266 * In the event an MPS table was found, forget it.
1267 * Boot with "acpi=off" to use MPS on such a system.
1268 */
1269 if (smp_found_config) {
1270 printk(KERN_WARNING PREFIX
1271 "No APIC-table, disabling MPS\n");
1272 smp_found_config = 0;
1273 }
1274 }
1275
1276 /*
1277 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1278 * processors, where MPS only supports physical.
1279 */
1280 if (acpi_lapic && acpi_ioapic)
1281 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1282 "information\n");
1283 else if (acpi_lapic)
1284 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1285 "configuration information\n");
1286 #endif
1287 return;
1288 }
1289
1290 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1291 {
1292 if (!acpi_force) {
1293 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1294 d->ident);
1295 acpi_noirq_set();
1296 }
1297 return 0;
1298 }
1299
1300 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1301 {
1302 if (!acpi_force) {
1303 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1304 d->ident);
1305 acpi_disable_pci();
1306 }
1307 return 0;
1308 }
1309
1310 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1311 {
1312 if (!acpi_force) {
1313 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1314 disable_acpi();
1315 } else {
1316 printk(KERN_NOTICE
1317 "Warning: DMI blacklist says broken, but acpi forced\n");
1318 }
1319 return 0;
1320 }
1321
1322 /*
1323 * Force ignoring BIOS IRQ0 override
1324 */
1325 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1326 {
1327 if (!acpi_skip_timer_override) {
1328 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1329 d->ident);
1330 acpi_skip_timer_override = 1;
1331 }
1332 return 0;
1333 }
1334
1335 /*
1336 * ACPI offers an alternative platform interface model that removes
1337 * ACPI hardware requirements for platforms that do not implement
1338 * the PC Architecture.
1339 *
1340 * We initialize the Hardware-reduced ACPI model here:
1341 */
1342 static void __init acpi_reduced_hw_init(void)
1343 {
1344 if (acpi_gbl_reduced_hardware) {
1345 /*
1346 * Override x86_init functions and bypass legacy pic
1347 * in Hardware-reduced ACPI mode
1348 */
1349 x86_init.timers.timer_init = x86_init_noop;
1350 x86_init.irqs.pre_vector_init = x86_init_noop;
1351 legacy_pic = &null_legacy_pic;
1352 }
1353 }
1354
1355 /*
1356 * If your system is blacklisted here, but you find that acpi=force
1357 * works for you, please contact linux-acpi@vger.kernel.org
1358 */
1359 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1360 /*
1361 * Boxes that need ACPI disabled
1362 */
1363 {
1364 .callback = dmi_disable_acpi,
1365 .ident = "IBM Thinkpad",
1366 .matches = {
1367 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1368 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1369 },
1370 },
1371
1372 /*
1373 * Boxes that need ACPI PCI IRQ routing disabled
1374 */
1375 {
1376 .callback = disable_acpi_irq,
1377 .ident = "ASUS A7V",
1378 .matches = {
1379 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1380 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1381 /* newer BIOS, Revision 1011, does work */
1382 DMI_MATCH(DMI_BIOS_VERSION,
1383 "ASUS A7V ACPI BIOS Revision 1007"),
1384 },
1385 },
1386 {
1387 /*
1388 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1389 * for LPC bridge, which is needed for the PCI
1390 * interrupt links to work. DSDT fix is in bug 5966.
1391 * 2645, 2646 model numbers are shared with 600/600E/600X
1392 */
1393 .callback = disable_acpi_irq,
1394 .ident = "IBM Thinkpad 600 Series 2645",
1395 .matches = {
1396 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1397 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1398 },
1399 },
1400 {
1401 .callback = disable_acpi_irq,
1402 .ident = "IBM Thinkpad 600 Series 2646",
1403 .matches = {
1404 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1405 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1406 },
1407 },
1408 /*
1409 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1410 */
1411 { /* _BBN 0 bug */
1412 .callback = disable_acpi_pci,
1413 .ident = "ASUS PR-DLS",
1414 .matches = {
1415 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1416 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1417 DMI_MATCH(DMI_BIOS_VERSION,
1418 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1419 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1420 },
1421 },
1422 {
1423 .callback = disable_acpi_pci,
1424 .ident = "Acer TravelMate 36x Laptop",
1425 .matches = {
1426 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1427 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1428 },
1429 },
1430 {}
1431 };
1432
1433 /* second table for DMI checks that should run after early-quirks */
1434 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1435 /*
1436 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1437 * which includes some code which overrides all temperature
1438 * trip points to 16C if the INTIN2 input of the I/O APIC
1439 * is enabled. This input is incorrectly designated the
1440 * ISA IRQ 0 via an interrupt source override even though
1441 * it is wired to the output of the master 8259A and INTIN0
1442 * is not connected at all. Force ignoring BIOS IRQ0
1443 * override in that cases.
1444 */
1445 {
1446 .callback = dmi_ignore_irq0_timer_override,
1447 .ident = "HP nx6115 laptop",
1448 .matches = {
1449 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1450 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1451 },
1452 },
1453 {
1454 .callback = dmi_ignore_irq0_timer_override,
1455 .ident = "HP NX6125 laptop",
1456 .matches = {
1457 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1458 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1459 },
1460 },
1461 {
1462 .callback = dmi_ignore_irq0_timer_override,
1463 .ident = "HP NX6325 laptop",
1464 .matches = {
1465 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1466 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1467 },
1468 },
1469 {
1470 .callback = dmi_ignore_irq0_timer_override,
1471 .ident = "HP 6715b laptop",
1472 .matches = {
1473 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1474 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1475 },
1476 },
1477 {
1478 .callback = dmi_ignore_irq0_timer_override,
1479 .ident = "FUJITSU SIEMENS",
1480 .matches = {
1481 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1482 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1483 },
1484 },
1485 {}
1486 };
1487
1488 /*
1489 * acpi_boot_table_init() and acpi_boot_init()
1490 * called from setup_arch(), always.
1491 * 1. checksums all tables
1492 * 2. enumerates lapics
1493 * 3. enumerates io-apics
1494 *
1495 * acpi_table_init() is separate to allow reading SRAT without
1496 * other side effects.
1497 *
1498 * side effects of acpi_boot_init:
1499 * acpi_lapic = 1 if LAPIC found
1500 * acpi_ioapic = 1 if IOAPIC found
1501 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1502 * if acpi_blacklisted() acpi_disabled = 1;
1503 * acpi_irq_model=...
1504 * ...
1505 */
1506
1507 void __init acpi_boot_table_init(void)
1508 {
1509 dmi_check_system(acpi_dmi_table);
1510
1511 /*
1512 * If acpi_disabled, bail out
1513 */
1514 if (acpi_disabled)
1515 return;
1516
1517 /*
1518 * Initialize the ACPI boot-time table parser.
1519 */
1520 if (acpi_table_init()) {
1521 disable_acpi();
1522 return;
1523 }
1524
1525 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1526
1527 /*
1528 * blacklist may disable ACPI entirely
1529 */
1530 if (acpi_blacklisted()) {
1531 if (acpi_force) {
1532 printk(KERN_WARNING PREFIX "acpi=force override\n");
1533 } else {
1534 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1535 disable_acpi();
1536 return;
1537 }
1538 }
1539 }
1540
1541 int __init early_acpi_boot_init(void)
1542 {
1543 /*
1544 * If acpi_disabled, bail out
1545 */
1546 if (acpi_disabled)
1547 return 1;
1548
1549 /*
1550 * Process the Multiple APIC Description Table (MADT), if present
1551 */
1552 early_acpi_process_madt();
1553
1554 /*
1555 * Hardware-reduced ACPI mode initialization:
1556 */
1557 acpi_reduced_hw_init();
1558
1559 return 0;
1560 }
1561
1562 static int __init acpi_parse_bgrt(struct acpi_table_header *table)
1563 {
1564 efi_bgrt_init(table);
1565 return 0;
1566 }
1567
1568 int __init acpi_boot_init(void)
1569 {
1570 /* those are executed after early-quirks are executed */
1571 dmi_check_system(acpi_dmi_table_late);
1572
1573 /*
1574 * If acpi_disabled, bail out
1575 */
1576 if (acpi_disabled)
1577 return 1;
1578
1579 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1580
1581 /*
1582 * set sci_int and PM timer address
1583 */
1584 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1585
1586 /*
1587 * Process the Multiple APIC Description Table (MADT), if present
1588 */
1589 acpi_process_madt();
1590
1591 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1592 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1593 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1594
1595 if (!acpi_noirq)
1596 x86_init.pci.init = pci_acpi_init;
1597
1598 return 0;
1599 }
1600
1601 static int __init parse_acpi(char *arg)
1602 {
1603 if (!arg)
1604 return -EINVAL;
1605
1606 /* "acpi=off" disables both ACPI table parsing and interpreter */
1607 if (strcmp(arg, "off") == 0) {
1608 disable_acpi();
1609 }
1610 /* acpi=force to over-ride black-list */
1611 else if (strcmp(arg, "force") == 0) {
1612 acpi_force = 1;
1613 acpi_disabled = 0;
1614 }
1615 /* acpi=strict disables out-of-spec workarounds */
1616 else if (strcmp(arg, "strict") == 0) {
1617 acpi_strict = 1;
1618 }
1619 /* acpi=rsdt use RSDT instead of XSDT */
1620 else if (strcmp(arg, "rsdt") == 0) {
1621 acpi_gbl_do_not_use_xsdt = TRUE;
1622 }
1623 /* "acpi=noirq" disables ACPI interrupt routing */
1624 else if (strcmp(arg, "noirq") == 0) {
1625 acpi_noirq_set();
1626 }
1627 /* "acpi=copy_dsdt" copys DSDT */
1628 else if (strcmp(arg, "copy_dsdt") == 0) {
1629 acpi_gbl_copy_dsdt_locally = 1;
1630 }
1631 /* "acpi=nocmcff" disables FF mode for corrected errors */
1632 else if (strcmp(arg, "nocmcff") == 0) {
1633 acpi_disable_cmcff = 1;
1634 } else {
1635 /* Core will printk when we return error. */
1636 return -EINVAL;
1637 }
1638 return 0;
1639 }
1640 early_param("acpi", parse_acpi);
1641
1642 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1643 static int __init parse_pci(char *arg)
1644 {
1645 if (arg && strcmp(arg, "noacpi") == 0)
1646 acpi_disable_pci();
1647 return 0;
1648 }
1649 early_param("pci", parse_pci);
1650
1651 int __init acpi_mps_check(void)
1652 {
1653 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1654 /* mptable code is not built-in*/
1655 if (acpi_disabled || acpi_noirq) {
1656 printk(KERN_WARNING "MPS support code is not built-in.\n"
1657 "Using acpi=off or acpi=noirq or pci=noacpi "
1658 "may have problem\n");
1659 return 1;
1660 }
1661 #endif
1662 return 0;
1663 }
1664
1665 #ifdef CONFIG_X86_IO_APIC
1666 static int __init parse_acpi_skip_timer_override(char *arg)
1667 {
1668 acpi_skip_timer_override = 1;
1669 return 0;
1670 }
1671 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1672
1673 static int __init parse_acpi_use_timer_override(char *arg)
1674 {
1675 acpi_use_timer_override = 1;
1676 return 0;
1677 }
1678 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1679 #endif /* CONFIG_X86_IO_APIC */
1680
1681 static int __init setup_acpi_sci(char *s)
1682 {
1683 if (!s)
1684 return -EINVAL;
1685 if (!strcmp(s, "edge"))
1686 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1687 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1688 else if (!strcmp(s, "level"))
1689 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1690 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1691 else if (!strcmp(s, "high"))
1692 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1693 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1694 else if (!strcmp(s, "low"))
1695 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1696 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1697 else
1698 return -EINVAL;
1699 return 0;
1700 }
1701 early_param("acpi_sci", setup_acpi_sci);
1702
1703 int __acpi_acquire_global_lock(unsigned int *lock)
1704 {
1705 unsigned int old, new, val;
1706 do {
1707 old = *lock;
1708 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1709 val = cmpxchg(lock, old, new);
1710 } while (unlikely (val != old));
1711 return (new < 3) ? -1 : 0;
1712 }
1713
1714 int __acpi_release_global_lock(unsigned int *lock)
1715 {
1716 unsigned int old, new, val;
1717 do {
1718 old = *lock;
1719 new = old & ~0x3;
1720 val = cmpxchg(lock, old, new);
1721 } while (unlikely (val != old));
1722 return old & 0x1;
1723 }
1724
1725 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1726 {
1727 e820_add_region(addr, size, E820_ACPI);
1728 update_e820();
1729 }
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