]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/x86/kernel/acpi/boot.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mtd: nand: atmel: Relax tADL_min constraint
[mirror_ubuntu-artful-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/e820/api.h>
41 #include <asm/irqdomain.h>
42 #include <asm/pci_x86.h>
43 #include <asm/pgtable.h>
44 #include <asm/io_apic.h>
45 #include <asm/apic.h>
46 #include <asm/io.h>
47 #include <asm/mpspec.h>
48 #include <asm/smp.h>
49 #include <asm/i8259.h>
50
51 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
52 static int __initdata acpi_force = 0;
53 int acpi_disabled;
54 EXPORT_SYMBOL(acpi_disabled);
55
56 #ifdef CONFIG_X86_64
57 # include <asm/proto.h>
58 #endif /* X86 */
59
60 #define PREFIX "ACPI: "
61
62 int acpi_noirq; /* skip ACPI IRQ initialization */
63 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
64 EXPORT_SYMBOL(acpi_pci_disabled);
65
66 int acpi_lapic;
67 int acpi_ioapic;
68 int acpi_strict;
69 int acpi_disable_cmcff;
70
71 u8 acpi_sci_flags __initdata;
72 int acpi_sci_override_gsi __initdata;
73 int acpi_skip_timer_override __initdata;
74 int acpi_use_timer_override __initdata;
75 int acpi_fix_pin2_polarity __initdata;
76
77 #ifdef CONFIG_X86_LOCAL_APIC
78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
79 #endif
80
81 #ifdef CONFIG_X86_IO_APIC
82 /*
83 * Locks related to IOAPIC hotplug
84 * Hotplug side:
85 * ->device_hotplug_lock
86 * ->acpi_ioapic_lock
87 * ->ioapic_lock
88 * Interrupt mapping side:
89 * ->acpi_ioapic_lock
90 * ->ioapic_mutex
91 * ->ioapic_lock
92 */
93 static DEFINE_MUTEX(acpi_ioapic_lock);
94 #endif
95
96 /* --------------------------------------------------------------------------
97 Boot-time Configuration
98 -------------------------------------------------------------------------- */
99
100 /*
101 * The default interrupt routing model is PIC (8259). This gets
102 * overridden if IOAPICs are enumerated (below).
103 */
104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
105
106
107 /*
108 * ISA irqs by default are the first 16 gsis but can be
109 * any gsi as specified by an interrupt source override.
110 */
111 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
112 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
113 };
114
115 #define ACPI_INVALID_GSI INT_MIN
116
117 /*
118 * This is just a simple wrapper around early_ioremap(),
119 * with sanity checks for phys == 0 and size == 0.
120 */
121 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
122 {
123
124 if (!phys || !size)
125 return NULL;
126
127 return early_ioremap(phys, size);
128 }
129
130 void __init __acpi_unmap_table(char *map, unsigned long size)
131 {
132 if (!map || !size)
133 return;
134
135 early_iounmap(map, size);
136 }
137
138 #ifdef CONFIG_X86_LOCAL_APIC
139 static int __init acpi_parse_madt(struct acpi_table_header *table)
140 {
141 struct acpi_table_madt *madt = NULL;
142
143 if (!boot_cpu_has(X86_FEATURE_APIC))
144 return -EINVAL;
145
146 madt = (struct acpi_table_madt *)table;
147 if (!madt) {
148 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
149 return -ENODEV;
150 }
151
152 if (madt->address) {
153 acpi_lapic_addr = (u64) madt->address;
154
155 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
156 madt->address);
157 }
158
159 default_acpi_madt_oem_check(madt->header.oem_id,
160 madt->header.oem_table_id);
161
162 return 0;
163 }
164
165 /**
166 * acpi_register_lapic - register a local apic and generates a logic cpu number
167 * @id: local apic id to register
168 * @acpiid: ACPI id to register
169 * @enabled: this cpu is enabled or not
170 *
171 * Returns the logic cpu number which maps to the local apic
172 */
173 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
174 {
175 unsigned int ver = 0;
176 int cpu;
177
178 if (id >= MAX_LOCAL_APIC) {
179 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
180 return -EINVAL;
181 }
182
183 if (!enabled) {
184 ++disabled_cpus;
185 return -EINVAL;
186 }
187
188 if (boot_cpu_physical_apicid != -1U)
189 ver = boot_cpu_apic_version;
190
191 cpu = generic_processor_info(id, ver);
192 if (cpu >= 0)
193 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
194
195 return cpu;
196 }
197
198 static int __init
199 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
200 {
201 struct acpi_madt_local_x2apic *processor = NULL;
202 int apic_id;
203 u8 enabled;
204
205 processor = (struct acpi_madt_local_x2apic *)header;
206
207 if (BAD_MADT_ENTRY(processor, end))
208 return -EINVAL;
209
210 acpi_table_print_madt_entry(header);
211
212 apic_id = processor->local_apic_id;
213 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
214 #ifdef CONFIG_X86_X2APIC
215 /*
216 * We need to register disabled CPU as well to permit
217 * counting disabled CPUs. This allows us to size
218 * cpus_possible_map more accurately, to permit
219 * to not preallocating memory for all NR_CPUS
220 * when we use CPU hotplug.
221 */
222 if (!apic->apic_id_valid(apic_id) && enabled)
223 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
224 else
225 acpi_register_lapic(apic_id, processor->uid, enabled);
226 #else
227 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
228 #endif
229
230 return 0;
231 }
232
233 static int __init
234 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
235 {
236 struct acpi_madt_local_apic *processor = NULL;
237
238 processor = (struct acpi_madt_local_apic *)header;
239
240 if (BAD_MADT_ENTRY(processor, end))
241 return -EINVAL;
242
243 acpi_table_print_madt_entry(header);
244
245 /* Ignore invalid ID */
246 if (processor->id == 0xff)
247 return 0;
248
249 /*
250 * We need to register disabled CPU as well to permit
251 * counting disabled CPUs. This allows us to size
252 * cpus_possible_map more accurately, to permit
253 * to not preallocating memory for all NR_CPUS
254 * when we use CPU hotplug.
255 */
256 acpi_register_lapic(processor->id, /* APIC ID */
257 processor->processor_id, /* ACPI ID */
258 processor->lapic_flags & ACPI_MADT_ENABLED);
259
260 return 0;
261 }
262
263 static int __init
264 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
265 {
266 struct acpi_madt_local_sapic *processor = NULL;
267
268 processor = (struct acpi_madt_local_sapic *)header;
269
270 if (BAD_MADT_ENTRY(processor, end))
271 return -EINVAL;
272
273 acpi_table_print_madt_entry(header);
274
275 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
276 processor->processor_id, /* ACPI ID */
277 processor->lapic_flags & ACPI_MADT_ENABLED);
278
279 return 0;
280 }
281
282 static int __init
283 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
284 const unsigned long end)
285 {
286 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
287
288 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
289
290 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
291 return -EINVAL;
292
293 acpi_table_print_madt_entry(header);
294
295 acpi_lapic_addr = lapic_addr_ovr->address;
296
297 return 0;
298 }
299
300 static int __init
301 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
302 const unsigned long end)
303 {
304 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
305
306 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
307
308 if (BAD_MADT_ENTRY(x2apic_nmi, end))
309 return -EINVAL;
310
311 acpi_table_print_madt_entry(header);
312
313 if (x2apic_nmi->lint != 1)
314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
315
316 return 0;
317 }
318
319 static int __init
320 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
321 {
322 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
323
324 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
325
326 if (BAD_MADT_ENTRY(lapic_nmi, end))
327 return -EINVAL;
328
329 acpi_table_print_madt_entry(header);
330
331 if (lapic_nmi->lint != 1)
332 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
333
334 return 0;
335 }
336
337 #endif /*CONFIG_X86_LOCAL_APIC */
338
339 #ifdef CONFIG_X86_IO_APIC
340 #define MP_ISA_BUS 0
341
342 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
343 u32 gsi)
344 {
345 int ioapic;
346 int pin;
347 struct mpc_intsrc mp_irq;
348
349 /*
350 * Convert 'gsi' to 'ioapic.pin'.
351 */
352 ioapic = mp_find_ioapic(gsi);
353 if (ioapic < 0)
354 return;
355 pin = mp_find_ioapic_pin(ioapic, gsi);
356
357 /*
358 * TBD: This check is for faulty timer entries, where the override
359 * erroneously sets the trigger to level, resulting in a HUGE
360 * increase of timer interrupts!
361 */
362 if ((bus_irq == 0) && (trigger == 3))
363 trigger = 1;
364
365 mp_irq.type = MP_INTSRC;
366 mp_irq.irqtype = mp_INT;
367 mp_irq.irqflag = (trigger << 2) | polarity;
368 mp_irq.srcbus = MP_ISA_BUS;
369 mp_irq.srcbusirq = bus_irq; /* IRQ */
370 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
371 mp_irq.dstirq = pin; /* INTIN# */
372
373 mp_save_irq(&mp_irq);
374
375 /*
376 * Reset default identity mapping if gsi is also an legacy IRQ,
377 * otherwise there will be more than one entry with the same GSI
378 * and acpi_isa_irq_to_gsi() may give wrong result.
379 */
380 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
381 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
382 isa_irq_to_gsi[bus_irq] = gsi;
383 }
384
385 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
386 int polarity)
387 {
388 #ifdef CONFIG_X86_MPPARSE
389 struct mpc_intsrc mp_irq;
390 struct pci_dev *pdev;
391 unsigned char number;
392 unsigned int devfn;
393 int ioapic;
394 u8 pin;
395
396 if (!acpi_ioapic)
397 return 0;
398 if (!dev || !dev_is_pci(dev))
399 return 0;
400
401 pdev = to_pci_dev(dev);
402 number = pdev->bus->number;
403 devfn = pdev->devfn;
404 pin = pdev->pin;
405 /* print the entry should happen on mptable identically */
406 mp_irq.type = MP_INTSRC;
407 mp_irq.irqtype = mp_INT;
408 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
409 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
410 mp_irq.srcbus = number;
411 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
412 ioapic = mp_find_ioapic(gsi);
413 mp_irq.dstapic = mpc_ioapic_id(ioapic);
414 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
415
416 mp_save_irq(&mp_irq);
417 #endif
418 return 0;
419 }
420
421 static int __init
422 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
423 {
424 struct acpi_madt_io_apic *ioapic = NULL;
425 struct ioapic_domain_cfg cfg = {
426 .type = IOAPIC_DOMAIN_DYNAMIC,
427 .ops = &mp_ioapic_irqdomain_ops,
428 };
429
430 ioapic = (struct acpi_madt_io_apic *)header;
431
432 if (BAD_MADT_ENTRY(ioapic, end))
433 return -EINVAL;
434
435 acpi_table_print_madt_entry(header);
436
437 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
438 if (ioapic->global_irq_base < nr_legacy_irqs())
439 cfg.type = IOAPIC_DOMAIN_LEGACY;
440
441 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
442 &cfg);
443
444 return 0;
445 }
446
447 /*
448 * Parse Interrupt Source Override for the ACPI SCI
449 */
450 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
451 {
452 if (trigger == 0) /* compatible SCI trigger is level */
453 trigger = 3;
454
455 if (polarity == 0) /* compatible SCI polarity is low */
456 polarity = 3;
457
458 /* Command-line over-ride via acpi_sci= */
459 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
460 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
461
462 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
463 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
464
465 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
466 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
467
468 /*
469 * stash over-ride to indicate we've been here
470 * and for later update of acpi_gbl_FADT
471 */
472 acpi_sci_override_gsi = gsi;
473 return;
474 }
475
476 static int __init
477 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
478 const unsigned long end)
479 {
480 struct acpi_madt_interrupt_override *intsrc = NULL;
481
482 intsrc = (struct acpi_madt_interrupt_override *)header;
483
484 if (BAD_MADT_ENTRY(intsrc, end))
485 return -EINVAL;
486
487 acpi_table_print_madt_entry(header);
488
489 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
490 acpi_sci_ioapic_setup(intsrc->source_irq,
491 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
492 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
493 intsrc->global_irq);
494 return 0;
495 }
496
497 if (intsrc->source_irq == 0) {
498 if (acpi_skip_timer_override) {
499 printk(PREFIX "BIOS IRQ0 override ignored.\n");
500 return 0;
501 }
502
503 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
504 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
505 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
506 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
507 }
508 }
509
510 mp_override_legacy_irq(intsrc->source_irq,
511 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
512 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
513 intsrc->global_irq);
514
515 return 0;
516 }
517
518 static int __init
519 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
520 {
521 struct acpi_madt_nmi_source *nmi_src = NULL;
522
523 nmi_src = (struct acpi_madt_nmi_source *)header;
524
525 if (BAD_MADT_ENTRY(nmi_src, end))
526 return -EINVAL;
527
528 acpi_table_print_madt_entry(header);
529
530 /* TBD: Support nimsrc entries? */
531
532 return 0;
533 }
534
535 #endif /* CONFIG_X86_IO_APIC */
536
537 /*
538 * acpi_pic_sci_set_trigger()
539 *
540 * use ELCR to set PIC-mode trigger type for SCI
541 *
542 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
543 * it may require Edge Trigger -- use "acpi_sci=edge"
544 *
545 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
546 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
547 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
548 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
549 */
550
551 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
552 {
553 unsigned int mask = 1 << irq;
554 unsigned int old, new;
555
556 /* Real old ELCR mask */
557 old = inb(0x4d0) | (inb(0x4d1) << 8);
558
559 /*
560 * If we use ACPI to set PCI IRQs, then we should clear ELCR
561 * since we will set it correctly as we enable the PCI irq
562 * routing.
563 */
564 new = acpi_noirq ? old : 0;
565
566 /*
567 * Update SCI information in the ELCR, it isn't in the PCI
568 * routing tables..
569 */
570 switch (trigger) {
571 case 1: /* Edge - clear */
572 new &= ~mask;
573 break;
574 case 3: /* Level - set */
575 new |= mask;
576 break;
577 }
578
579 if (old == new)
580 return;
581
582 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
583 outb(new, 0x4d0);
584 outb(new >> 8, 0x4d1);
585 }
586
587 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
588 {
589 int rc, irq, trigger, polarity;
590
591 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
592 *irqp = gsi;
593 return 0;
594 }
595
596 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
597 if (rc == 0) {
598 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
599 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
600 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
601 if (irq >= 0) {
602 *irqp = irq;
603 return 0;
604 }
605 }
606
607 return -1;
608 }
609 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
610
611 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
612 {
613 if (isa_irq < nr_legacy_irqs() &&
614 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
615 *gsi = isa_irq_to_gsi[isa_irq];
616 return 0;
617 }
618
619 return -1;
620 }
621
622 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
623 int trigger, int polarity)
624 {
625 #ifdef CONFIG_PCI
626 /*
627 * Make sure all (legacy) PCI IRQs are set as level-triggered.
628 */
629 if (trigger == ACPI_LEVEL_SENSITIVE)
630 elcr_set_level_irq(gsi);
631 #endif
632
633 return gsi;
634 }
635
636 #ifdef CONFIG_X86_LOCAL_APIC
637 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
638 int trigger, int polarity)
639 {
640 int irq = gsi;
641 #ifdef CONFIG_X86_IO_APIC
642 int node;
643 struct irq_alloc_info info;
644
645 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
646 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
647 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
648 ioapic_set_alloc_attr(&info, node, trigger, polarity);
649
650 mutex_lock(&acpi_ioapic_lock);
651 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
652 /* Don't set up the ACPI SCI because it's already set up */
653 if (irq >= 0 && enable_update_mptable &&
654 acpi_gbl_FADT.sci_interrupt != gsi)
655 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
656 mutex_unlock(&acpi_ioapic_lock);
657 #endif
658
659 return irq;
660 }
661
662 static void acpi_unregister_gsi_ioapic(u32 gsi)
663 {
664 #ifdef CONFIG_X86_IO_APIC
665 int irq;
666
667 mutex_lock(&acpi_ioapic_lock);
668 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
669 if (irq > 0)
670 mp_unmap_irq(irq);
671 mutex_unlock(&acpi_ioapic_lock);
672 #endif
673 }
674 #endif
675
676 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
677 int trigger, int polarity) = acpi_register_gsi_pic;
678 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
679
680 #ifdef CONFIG_ACPI_SLEEP
681 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
682 #else
683 int (*acpi_suspend_lowlevel)(void);
684 #endif
685
686 /*
687 * success: return IRQ number (>=0)
688 * failure: return < 0
689 */
690 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
691 {
692 return __acpi_register_gsi(dev, gsi, trigger, polarity);
693 }
694 EXPORT_SYMBOL_GPL(acpi_register_gsi);
695
696 void acpi_unregister_gsi(u32 gsi)
697 {
698 if (__acpi_unregister_gsi)
699 __acpi_unregister_gsi(gsi);
700 }
701 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
702
703 #ifdef CONFIG_X86_LOCAL_APIC
704 static void __init acpi_set_irq_model_ioapic(void)
705 {
706 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
707 __acpi_register_gsi = acpi_register_gsi_ioapic;
708 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
709 acpi_ioapic = 1;
710 }
711 #endif
712
713 /*
714 * ACPI based hotplug support for CPU
715 */
716 #ifdef CONFIG_ACPI_HOTPLUG_CPU
717 #include <acpi/processor.h>
718
719 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
720 {
721 #ifdef CONFIG_ACPI_NUMA
722 int nid;
723
724 nid = acpi_get_node(handle);
725 if (nid != NUMA_NO_NODE) {
726 set_apicid_to_node(physid, nid);
727 numa_set_node(cpu, nid);
728 }
729 #endif
730 return 0;
731 }
732
733 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
734 int *pcpu)
735 {
736 int cpu;
737
738 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
739 if (cpu < 0) {
740 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
741 return cpu;
742 }
743
744 acpi_processor_set_pdc(handle);
745 acpi_map_cpu2node(handle, cpu, physid);
746
747 *pcpu = cpu;
748 return 0;
749 }
750 EXPORT_SYMBOL(acpi_map_cpu);
751
752 int acpi_unmap_cpu(int cpu)
753 {
754 #ifdef CONFIG_ACPI_NUMA
755 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
756 #endif
757
758 per_cpu(x86_cpu_to_apicid, cpu) = -1;
759 set_cpu_present(cpu, false);
760 num_processors--;
761
762 return (0);
763 }
764 EXPORT_SYMBOL(acpi_unmap_cpu);
765 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
766
767 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
768 {
769 int ret = -ENOSYS;
770 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
771 int ioapic_id;
772 u64 addr;
773 struct ioapic_domain_cfg cfg = {
774 .type = IOAPIC_DOMAIN_DYNAMIC,
775 .ops = &mp_ioapic_irqdomain_ops,
776 };
777
778 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
779 if (ioapic_id < 0) {
780 unsigned long long uid;
781 acpi_status status;
782
783 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
784 NULL, &uid);
785 if (ACPI_FAILURE(status)) {
786 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
787 return -EINVAL;
788 }
789 ioapic_id = (int)uid;
790 }
791
792 mutex_lock(&acpi_ioapic_lock);
793 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
794 mutex_unlock(&acpi_ioapic_lock);
795 #endif
796
797 return ret;
798 }
799 EXPORT_SYMBOL(acpi_register_ioapic);
800
801 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
802 {
803 int ret = -ENOSYS;
804
805 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
806 mutex_lock(&acpi_ioapic_lock);
807 ret = mp_unregister_ioapic(gsi_base);
808 mutex_unlock(&acpi_ioapic_lock);
809 #endif
810
811 return ret;
812 }
813 EXPORT_SYMBOL(acpi_unregister_ioapic);
814
815 /**
816 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
817 * has been registered
818 * @handle: ACPI handle of the IOAPIC deivce
819 * @gsi_base: GSI base associated with the IOAPIC
820 *
821 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
822 * with acpi_register_ioapic()/acpi_unregister_ioapic().
823 */
824 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
825 {
826 int ret = 0;
827
828 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
829 mutex_lock(&acpi_ioapic_lock);
830 ret = mp_ioapic_registered(gsi_base);
831 mutex_unlock(&acpi_ioapic_lock);
832 #endif
833
834 return ret;
835 }
836
837 static int __init acpi_parse_sbf(struct acpi_table_header *table)
838 {
839 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
840
841 sbf_port = sb->cmos_index; /* Save CMOS port */
842
843 return 0;
844 }
845
846 #ifdef CONFIG_HPET_TIMER
847 #include <asm/hpet.h>
848
849 static struct resource *hpet_res __initdata;
850
851 static int __init acpi_parse_hpet(struct acpi_table_header *table)
852 {
853 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
854
855 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
856 printk(KERN_WARNING PREFIX "HPET timers must be located in "
857 "memory.\n");
858 return -1;
859 }
860
861 hpet_address = hpet_tbl->address.address;
862 hpet_blockid = hpet_tbl->sequence;
863
864 /*
865 * Some broken BIOSes advertise HPET at 0x0. We really do not
866 * want to allocate a resource there.
867 */
868 if (!hpet_address) {
869 printk(KERN_WARNING PREFIX
870 "HPET id: %#x base: %#lx is invalid\n",
871 hpet_tbl->id, hpet_address);
872 return 0;
873 }
874 #ifdef CONFIG_X86_64
875 /*
876 * Some even more broken BIOSes advertise HPET at
877 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
878 * some noise:
879 */
880 if (hpet_address == 0xfed0000000000000UL) {
881 if (!hpet_force_user) {
882 printk(KERN_WARNING PREFIX "HPET id: %#x "
883 "base: 0xfed0000000000000 is bogus\n "
884 "try hpet=force on the kernel command line to "
885 "fix it up to 0xfed00000.\n", hpet_tbl->id);
886 hpet_address = 0;
887 return 0;
888 }
889 printk(KERN_WARNING PREFIX
890 "HPET id: %#x base: 0xfed0000000000000 fixed up "
891 "to 0xfed00000.\n", hpet_tbl->id);
892 hpet_address >>= 32;
893 }
894 #endif
895 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
896 hpet_tbl->id, hpet_address);
897
898 /*
899 * Allocate and initialize the HPET firmware resource for adding into
900 * the resource tree during the lateinit timeframe.
901 */
902 #define HPET_RESOURCE_NAME_SIZE 9
903 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
904
905 hpet_res->name = (void *)&hpet_res[1];
906 hpet_res->flags = IORESOURCE_MEM;
907 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
908 hpet_tbl->sequence);
909
910 hpet_res->start = hpet_address;
911 hpet_res->end = hpet_address + (1 * 1024) - 1;
912
913 return 0;
914 }
915
916 /*
917 * hpet_insert_resource inserts the HPET resources used into the resource
918 * tree.
919 */
920 static __init int hpet_insert_resource(void)
921 {
922 if (!hpet_res)
923 return 1;
924
925 return insert_resource(&iomem_resource, hpet_res);
926 }
927
928 late_initcall(hpet_insert_resource);
929
930 #else
931 #define acpi_parse_hpet NULL
932 #endif
933
934 static int __init acpi_parse_fadt(struct acpi_table_header *table)
935 {
936 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
937 pr_debug("ACPI: no legacy devices present\n");
938 x86_platform.legacy.devices.pnpbios = 0;
939 }
940
941 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
942 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
943 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
944 pr_debug("ACPI: i8042 controller is absent\n");
945 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
946 }
947
948 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
949 pr_debug("ACPI: not registering RTC platform device\n");
950 x86_platform.legacy.rtc = 0;
951 }
952
953 #ifdef CONFIG_X86_PM_TIMER
954 /* detect the location of the ACPI PM Timer */
955 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
956 /* FADT rev. 2 */
957 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
958 ACPI_ADR_SPACE_SYSTEM_IO)
959 return 0;
960
961 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
962 /*
963 * "X" fields are optional extensions to the original V1.0
964 * fields, so we must selectively expand V1.0 fields if the
965 * corresponding X field is zero.
966 */
967 if (!pmtmr_ioport)
968 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
969 } else {
970 /* FADT rev. 1 */
971 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
972 }
973 if (pmtmr_ioport)
974 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
975 pmtmr_ioport);
976 #endif
977 return 0;
978 }
979
980 #ifdef CONFIG_X86_LOCAL_APIC
981 /*
982 * Parse LAPIC entries in MADT
983 * returns 0 on success, < 0 on error
984 */
985
986 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
987 {
988 int count;
989
990 if (!boot_cpu_has(X86_FEATURE_APIC))
991 return -ENODEV;
992
993 /*
994 * Note that the LAPIC address is obtained from the MADT (32-bit value)
995 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
996 */
997
998 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
999 acpi_parse_lapic_addr_ovr, 0);
1000 if (count < 0) {
1001 printk(KERN_ERR PREFIX
1002 "Error parsing LAPIC address override entry\n");
1003 return count;
1004 }
1005
1006 register_lapic_address(acpi_lapic_addr);
1007
1008 return count;
1009 }
1010
1011 static int __init acpi_parse_madt_lapic_entries(void)
1012 {
1013 int count;
1014 int x2count = 0;
1015 int ret;
1016 struct acpi_subtable_proc madt_proc[2];
1017
1018 if (!boot_cpu_has(X86_FEATURE_APIC))
1019 return -ENODEV;
1020
1021 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1022 acpi_parse_sapic, MAX_LOCAL_APIC);
1023
1024 if (!count) {
1025 memset(madt_proc, 0, sizeof(madt_proc));
1026 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1027 madt_proc[0].handler = acpi_parse_lapic;
1028 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1029 madt_proc[1].handler = acpi_parse_x2apic;
1030 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1031 sizeof(struct acpi_table_madt),
1032 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1033 if (ret < 0) {
1034 printk(KERN_ERR PREFIX
1035 "Error parsing LAPIC/X2APIC entries\n");
1036 return ret;
1037 }
1038
1039 count = madt_proc[0].count;
1040 x2count = madt_proc[1].count;
1041 }
1042 if (!count && !x2count) {
1043 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1044 /* TBD: Cleanup to allow fallback to MPS */
1045 return -ENODEV;
1046 } else if (count < 0 || x2count < 0) {
1047 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1048 /* TBD: Cleanup to allow fallback to MPS */
1049 return count;
1050 }
1051
1052 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1053 acpi_parse_x2apic_nmi, 0);
1054 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1055 acpi_parse_lapic_nmi, 0);
1056 if (count < 0 || x2count < 0) {
1057 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1058 /* TBD: Cleanup to allow fallback to MPS */
1059 return count;
1060 }
1061 return 0;
1062 }
1063 #endif /* CONFIG_X86_LOCAL_APIC */
1064
1065 #ifdef CONFIG_X86_IO_APIC
1066 static void __init mp_config_acpi_legacy_irqs(void)
1067 {
1068 int i;
1069 struct mpc_intsrc mp_irq;
1070
1071 #ifdef CONFIG_EISA
1072 /*
1073 * Fabricate the legacy ISA bus (bus #31).
1074 */
1075 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1076 #endif
1077 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1078 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1079
1080 /*
1081 * Use the default configuration for the IRQs 0-15. Unless
1082 * overridden by (MADT) interrupt source override entries.
1083 */
1084 for (i = 0; i < nr_legacy_irqs(); i++) {
1085 int ioapic, pin;
1086 unsigned int dstapic;
1087 int idx;
1088 u32 gsi;
1089
1090 /* Locate the gsi that irq i maps to. */
1091 if (acpi_isa_irq_to_gsi(i, &gsi))
1092 continue;
1093
1094 /*
1095 * Locate the IOAPIC that manages the ISA IRQ.
1096 */
1097 ioapic = mp_find_ioapic(gsi);
1098 if (ioapic < 0)
1099 continue;
1100 pin = mp_find_ioapic_pin(ioapic, gsi);
1101 dstapic = mpc_ioapic_id(ioapic);
1102
1103 for (idx = 0; idx < mp_irq_entries; idx++) {
1104 struct mpc_intsrc *irq = mp_irqs + idx;
1105
1106 /* Do we already have a mapping for this ISA IRQ? */
1107 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1108 break;
1109
1110 /* Do we already have a mapping for this IOAPIC pin */
1111 if (irq->dstapic == dstapic && irq->dstirq == pin)
1112 break;
1113 }
1114
1115 if (idx != mp_irq_entries) {
1116 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1117 continue; /* IRQ already used */
1118 }
1119
1120 mp_irq.type = MP_INTSRC;
1121 mp_irq.irqflag = 0; /* Conforming */
1122 mp_irq.srcbus = MP_ISA_BUS;
1123 mp_irq.dstapic = dstapic;
1124 mp_irq.irqtype = mp_INT;
1125 mp_irq.srcbusirq = i; /* Identity mapped */
1126 mp_irq.dstirq = pin;
1127
1128 mp_save_irq(&mp_irq);
1129 }
1130 }
1131
1132 /*
1133 * Parse IOAPIC related entries in MADT
1134 * returns 0 on success, < 0 on error
1135 */
1136 static int __init acpi_parse_madt_ioapic_entries(void)
1137 {
1138 int count;
1139
1140 /*
1141 * ACPI interpreter is required to complete interrupt setup,
1142 * so if it is off, don't enumerate the io-apics with ACPI.
1143 * If MPS is present, it will handle them,
1144 * otherwise the system will stay in PIC mode
1145 */
1146 if (acpi_disabled || acpi_noirq)
1147 return -ENODEV;
1148
1149 if (!boot_cpu_has(X86_FEATURE_APIC))
1150 return -ENODEV;
1151
1152 /*
1153 * if "noapic" boot option, don't look for IO-APICs
1154 */
1155 if (skip_ioapic_setup) {
1156 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1157 "due to 'noapic' option.\n");
1158 return -ENODEV;
1159 }
1160
1161 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1162 MAX_IO_APICS);
1163 if (!count) {
1164 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1165 return -ENODEV;
1166 } else if (count < 0) {
1167 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1168 return count;
1169 }
1170
1171 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1172 acpi_parse_int_src_ovr, nr_irqs);
1173 if (count < 0) {
1174 printk(KERN_ERR PREFIX
1175 "Error parsing interrupt source overrides entry\n");
1176 /* TBD: Cleanup to allow fallback to MPS */
1177 return count;
1178 }
1179
1180 /*
1181 * If BIOS did not supply an INT_SRC_OVR for the SCI
1182 * pretend we got one so we can set the SCI flags.
1183 */
1184 if (!acpi_sci_override_gsi)
1185 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1186 acpi_gbl_FADT.sci_interrupt);
1187
1188 /* Fill in identity legacy mappings where no override */
1189 mp_config_acpi_legacy_irqs();
1190
1191 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1192 acpi_parse_nmi_src, nr_irqs);
1193 if (count < 0) {
1194 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1195 /* TBD: Cleanup to allow fallback to MPS */
1196 return count;
1197 }
1198
1199 return 0;
1200 }
1201 #else
1202 static inline int acpi_parse_madt_ioapic_entries(void)
1203 {
1204 return -1;
1205 }
1206 #endif /* !CONFIG_X86_IO_APIC */
1207
1208 static void __init early_acpi_process_madt(void)
1209 {
1210 #ifdef CONFIG_X86_LOCAL_APIC
1211 int error;
1212
1213 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1214
1215 /*
1216 * Parse MADT LAPIC entries
1217 */
1218 error = early_acpi_parse_madt_lapic_addr_ovr();
1219 if (!error) {
1220 acpi_lapic = 1;
1221 smp_found_config = 1;
1222 }
1223 if (error == -EINVAL) {
1224 /*
1225 * Dell Precision Workstation 410, 610 come here.
1226 */
1227 printk(KERN_ERR PREFIX
1228 "Invalid BIOS MADT, disabling ACPI\n");
1229 disable_acpi();
1230 }
1231 }
1232 #endif
1233 }
1234
1235 static void __init acpi_process_madt(void)
1236 {
1237 #ifdef CONFIG_X86_LOCAL_APIC
1238 int error;
1239
1240 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1241
1242 /*
1243 * Parse MADT LAPIC entries
1244 */
1245 error = acpi_parse_madt_lapic_entries();
1246 if (!error) {
1247 acpi_lapic = 1;
1248
1249 /*
1250 * Parse MADT IO-APIC entries
1251 */
1252 mutex_lock(&acpi_ioapic_lock);
1253 error = acpi_parse_madt_ioapic_entries();
1254 mutex_unlock(&acpi_ioapic_lock);
1255 if (!error) {
1256 acpi_set_irq_model_ioapic();
1257
1258 smp_found_config = 1;
1259 }
1260 }
1261 if (error == -EINVAL) {
1262 /*
1263 * Dell Precision Workstation 410, 610 come here.
1264 */
1265 printk(KERN_ERR PREFIX
1266 "Invalid BIOS MADT, disabling ACPI\n");
1267 disable_acpi();
1268 }
1269 } else {
1270 /*
1271 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1272 * In the event an MPS table was found, forget it.
1273 * Boot with "acpi=off" to use MPS on such a system.
1274 */
1275 if (smp_found_config) {
1276 printk(KERN_WARNING PREFIX
1277 "No APIC-table, disabling MPS\n");
1278 smp_found_config = 0;
1279 }
1280 }
1281
1282 /*
1283 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1284 * processors, where MPS only supports physical.
1285 */
1286 if (acpi_lapic && acpi_ioapic)
1287 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1288 "information\n");
1289 else if (acpi_lapic)
1290 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1291 "configuration information\n");
1292 #endif
1293 return;
1294 }
1295
1296 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1297 {
1298 if (!acpi_force) {
1299 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1300 d->ident);
1301 acpi_noirq_set();
1302 }
1303 return 0;
1304 }
1305
1306 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1307 {
1308 if (!acpi_force) {
1309 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1310 d->ident);
1311 acpi_disable_pci();
1312 }
1313 return 0;
1314 }
1315
1316 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1317 {
1318 if (!acpi_force) {
1319 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1320 disable_acpi();
1321 } else {
1322 printk(KERN_NOTICE
1323 "Warning: DMI blacklist says broken, but acpi forced\n");
1324 }
1325 return 0;
1326 }
1327
1328 /*
1329 * Force ignoring BIOS IRQ0 override
1330 */
1331 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1332 {
1333 if (!acpi_skip_timer_override) {
1334 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1335 d->ident);
1336 acpi_skip_timer_override = 1;
1337 }
1338 return 0;
1339 }
1340
1341 /*
1342 * ACPI offers an alternative platform interface model that removes
1343 * ACPI hardware requirements for platforms that do not implement
1344 * the PC Architecture.
1345 *
1346 * We initialize the Hardware-reduced ACPI model here:
1347 */
1348 static void __init acpi_reduced_hw_init(void)
1349 {
1350 if (acpi_gbl_reduced_hardware) {
1351 /*
1352 * Override x86_init functions and bypass legacy pic
1353 * in Hardware-reduced ACPI mode
1354 */
1355 x86_init.timers.timer_init = x86_init_noop;
1356 x86_init.irqs.pre_vector_init = x86_init_noop;
1357 legacy_pic = &null_legacy_pic;
1358 }
1359 }
1360
1361 /*
1362 * If your system is blacklisted here, but you find that acpi=force
1363 * works for you, please contact linux-acpi@vger.kernel.org
1364 */
1365 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1366 /*
1367 * Boxes that need ACPI disabled
1368 */
1369 {
1370 .callback = dmi_disable_acpi,
1371 .ident = "IBM Thinkpad",
1372 .matches = {
1373 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1374 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1375 },
1376 },
1377
1378 /*
1379 * Boxes that need ACPI PCI IRQ routing disabled
1380 */
1381 {
1382 .callback = disable_acpi_irq,
1383 .ident = "ASUS A7V",
1384 .matches = {
1385 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1386 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1387 /* newer BIOS, Revision 1011, does work */
1388 DMI_MATCH(DMI_BIOS_VERSION,
1389 "ASUS A7V ACPI BIOS Revision 1007"),
1390 },
1391 },
1392 {
1393 /*
1394 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1395 * for LPC bridge, which is needed for the PCI
1396 * interrupt links to work. DSDT fix is in bug 5966.
1397 * 2645, 2646 model numbers are shared with 600/600E/600X
1398 */
1399 .callback = disable_acpi_irq,
1400 .ident = "IBM Thinkpad 600 Series 2645",
1401 .matches = {
1402 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1403 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1404 },
1405 },
1406 {
1407 .callback = disable_acpi_irq,
1408 .ident = "IBM Thinkpad 600 Series 2646",
1409 .matches = {
1410 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1411 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1412 },
1413 },
1414 /*
1415 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1416 */
1417 { /* _BBN 0 bug */
1418 .callback = disable_acpi_pci,
1419 .ident = "ASUS PR-DLS",
1420 .matches = {
1421 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1422 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1423 DMI_MATCH(DMI_BIOS_VERSION,
1424 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1425 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1426 },
1427 },
1428 {
1429 .callback = disable_acpi_pci,
1430 .ident = "Acer TravelMate 36x Laptop",
1431 .matches = {
1432 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1433 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1434 },
1435 },
1436 {}
1437 };
1438
1439 /* second table for DMI checks that should run after early-quirks */
1440 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1441 /*
1442 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1443 * which includes some code which overrides all temperature
1444 * trip points to 16C if the INTIN2 input of the I/O APIC
1445 * is enabled. This input is incorrectly designated the
1446 * ISA IRQ 0 via an interrupt source override even though
1447 * it is wired to the output of the master 8259A and INTIN0
1448 * is not connected at all. Force ignoring BIOS IRQ0
1449 * override in that cases.
1450 */
1451 {
1452 .callback = dmi_ignore_irq0_timer_override,
1453 .ident = "HP nx6115 laptop",
1454 .matches = {
1455 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1456 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1457 },
1458 },
1459 {
1460 .callback = dmi_ignore_irq0_timer_override,
1461 .ident = "HP NX6125 laptop",
1462 .matches = {
1463 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1465 },
1466 },
1467 {
1468 .callback = dmi_ignore_irq0_timer_override,
1469 .ident = "HP NX6325 laptop",
1470 .matches = {
1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1473 },
1474 },
1475 {
1476 .callback = dmi_ignore_irq0_timer_override,
1477 .ident = "HP 6715b laptop",
1478 .matches = {
1479 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1480 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1481 },
1482 },
1483 {
1484 .callback = dmi_ignore_irq0_timer_override,
1485 .ident = "FUJITSU SIEMENS",
1486 .matches = {
1487 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1488 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1489 },
1490 },
1491 {}
1492 };
1493
1494 /*
1495 * acpi_boot_table_init() and acpi_boot_init()
1496 * called from setup_arch(), always.
1497 * 1. checksums all tables
1498 * 2. enumerates lapics
1499 * 3. enumerates io-apics
1500 *
1501 * acpi_table_init() is separate to allow reading SRAT without
1502 * other side effects.
1503 *
1504 * side effects of acpi_boot_init:
1505 * acpi_lapic = 1 if LAPIC found
1506 * acpi_ioapic = 1 if IOAPIC found
1507 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1508 * if acpi_blacklisted() acpi_disabled = 1;
1509 * acpi_irq_model=...
1510 * ...
1511 */
1512
1513 void __init acpi_boot_table_init(void)
1514 {
1515 dmi_check_system(acpi_dmi_table);
1516
1517 /*
1518 * If acpi_disabled, bail out
1519 */
1520 if (acpi_disabled)
1521 return;
1522
1523 /*
1524 * Initialize the ACPI boot-time table parser.
1525 */
1526 if (acpi_table_init()) {
1527 disable_acpi();
1528 return;
1529 }
1530
1531 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1532
1533 /*
1534 * blacklist may disable ACPI entirely
1535 */
1536 if (acpi_blacklisted()) {
1537 if (acpi_force) {
1538 printk(KERN_WARNING PREFIX "acpi=force override\n");
1539 } else {
1540 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1541 disable_acpi();
1542 return;
1543 }
1544 }
1545 }
1546
1547 int __init early_acpi_boot_init(void)
1548 {
1549 /*
1550 * If acpi_disabled, bail out
1551 */
1552 if (acpi_disabled)
1553 return 1;
1554
1555 /*
1556 * Process the Multiple APIC Description Table (MADT), if present
1557 */
1558 early_acpi_process_madt();
1559
1560 /*
1561 * Hardware-reduced ACPI mode initialization:
1562 */
1563 acpi_reduced_hw_init();
1564
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__range_add(addr, size, E820_TYPE_ACPI);
1728 e820__update_table_print();
1729 }
Ubuntu Artful kernel mirror