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x86/ACPI: keep x86_cpu_to_acpiid mapping valid on CPU hotplug
[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
39 #include <asm/irqdomain.h>
40 #include <asm/pci_x86.h>
41 #include <asm/pgtable.h>
42 #include <asm/io_apic.h>
43 #include <asm/apic.h>
44 #include <asm/io.h>
45 #include <asm/mpspec.h>
46 #include <asm/smp.h>
47 #include <asm/i8259.h>
48
49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50 static int __initdata acpi_force = 0;
51 int acpi_disabled;
52 EXPORT_SYMBOL(acpi_disabled);
53
54 #ifdef CONFIG_X86_64
55 # include <asm/proto.h>
56 #endif /* X86 */
57
58 #define PREFIX "ACPI: "
59
60 int acpi_noirq; /* skip ACPI IRQ initialization */
61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
62 EXPORT_SYMBOL(acpi_pci_disabled);
63
64 int acpi_lapic;
65 int acpi_ioapic;
66 int acpi_strict;
67 int acpi_disable_cmcff;
68
69 u8 acpi_sci_flags __initdata;
70 int acpi_sci_override_gsi __initdata;
71 int acpi_skip_timer_override __initdata;
72 int acpi_use_timer_override __initdata;
73 int acpi_fix_pin2_polarity __initdata;
74
75 #ifdef CONFIG_X86_LOCAL_APIC
76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
77 #endif
78
79 #ifdef CONFIG_X86_IO_APIC
80 /*
81 * Locks related to IOAPIC hotplug
82 * Hotplug side:
83 * ->device_hotplug_lock
84 * ->acpi_ioapic_lock
85 * ->ioapic_lock
86 * Interrupt mapping side:
87 * ->acpi_ioapic_lock
88 * ->ioapic_mutex
89 * ->ioapic_lock
90 */
91 static DEFINE_MUTEX(acpi_ioapic_lock);
92 #endif
93
94 /* --------------------------------------------------------------------------
95 Boot-time Configuration
96 -------------------------------------------------------------------------- */
97
98 /*
99 * The default interrupt routing model is PIC (8259). This gets
100 * overridden if IOAPICs are enumerated (below).
101 */
102 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
103
104
105 /*
106 * ISA irqs by default are the first 16 gsis but can be
107 * any gsi as specified by an interrupt source override.
108 */
109 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
110 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
111 };
112
113 #define ACPI_INVALID_GSI INT_MIN
114
115 /*
116 * This is just a simple wrapper around early_ioremap(),
117 * with sanity checks for phys == 0 and size == 0.
118 */
119 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
120 {
121
122 if (!phys || !size)
123 return NULL;
124
125 return early_ioremap(phys, size);
126 }
127
128 void __init __acpi_unmap_table(char *map, unsigned long size)
129 {
130 if (!map || !size)
131 return;
132
133 early_iounmap(map, size);
134 }
135
136 #ifdef CONFIG_X86_LOCAL_APIC
137 static int __init acpi_parse_madt(struct acpi_table_header *table)
138 {
139 struct acpi_table_madt *madt = NULL;
140
141 if (!boot_cpu_has(X86_FEATURE_APIC))
142 return -EINVAL;
143
144 madt = (struct acpi_table_madt *)table;
145 if (!madt) {
146 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
147 return -ENODEV;
148 }
149
150 if (madt->address) {
151 acpi_lapic_addr = (u64) madt->address;
152
153 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
154 madt->address);
155 }
156
157 default_acpi_madt_oem_check(madt->header.oem_id,
158 madt->header.oem_table_id);
159
160 return 0;
161 }
162
163 /**
164 * acpi_register_lapic - register a local apic and generates a logic cpu number
165 * @id: local apic id to register
166 * @acpiid: ACPI id to register
167 * @enabled: this cpu is enabled or not
168 *
169 * Returns the logic cpu number which maps to the local apic
170 */
171 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
172 {
173 unsigned int ver = 0;
174 int cpu;
175
176 if (id >= MAX_LOCAL_APIC) {
177 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
178 return -EINVAL;
179 }
180
181 if (boot_cpu_physical_apicid != -1U)
182 ver = boot_cpu_apic_version;
183
184 cpu = __generic_processor_info(id, ver, enabled);
185 if (cpu >= 0)
186 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
187
188 return cpu;
189 }
190
191 static int __init
192 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
193 {
194 struct acpi_madt_local_x2apic *processor = NULL;
195 int apic_id;
196 u8 enabled;
197
198 processor = (struct acpi_madt_local_x2apic *)header;
199
200 if (BAD_MADT_ENTRY(processor, end))
201 return -EINVAL;
202
203 acpi_table_print_madt_entry(header);
204
205 apic_id = processor->local_apic_id;
206 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
207 #ifdef CONFIG_X86_X2APIC
208 /*
209 * We need to register disabled CPU as well to permit
210 * counting disabled CPUs. This allows us to size
211 * cpus_possible_map more accurately, to permit
212 * to not preallocating memory for all NR_CPUS
213 * when we use CPU hotplug.
214 */
215 if (!apic->apic_id_valid(apic_id) && enabled)
216 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
217 else
218 acpi_register_lapic(apic_id, processor->uid, enabled);
219 #else
220 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
221 #endif
222
223 return 0;
224 }
225
226 static int __init
227 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
228 {
229 struct acpi_madt_local_apic *processor = NULL;
230
231 processor = (struct acpi_madt_local_apic *)header;
232
233 if (BAD_MADT_ENTRY(processor, end))
234 return -EINVAL;
235
236 acpi_table_print_madt_entry(header);
237
238 /* Ignore invalid ID */
239 if (processor->id == 0xff)
240 return 0;
241
242 /*
243 * We need to register disabled CPU as well to permit
244 * counting disabled CPUs. This allows us to size
245 * cpus_possible_map more accurately, to permit
246 * to not preallocating memory for all NR_CPUS
247 * when we use CPU hotplug.
248 */
249 acpi_register_lapic(processor->id, /* APIC ID */
250 processor->processor_id, /* ACPI ID */
251 processor->lapic_flags & ACPI_MADT_ENABLED);
252
253 return 0;
254 }
255
256 static int __init
257 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
258 {
259 struct acpi_madt_local_sapic *processor = NULL;
260
261 processor = (struct acpi_madt_local_sapic *)header;
262
263 if (BAD_MADT_ENTRY(processor, end))
264 return -EINVAL;
265
266 acpi_table_print_madt_entry(header);
267
268 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
269 processor->processor_id, /* ACPI ID */
270 processor->lapic_flags & ACPI_MADT_ENABLED);
271
272 return 0;
273 }
274
275 static int __init
276 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
277 const unsigned long end)
278 {
279 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
280
281 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
282
283 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
284 return -EINVAL;
285
286 acpi_table_print_madt_entry(header);
287
288 acpi_lapic_addr = lapic_addr_ovr->address;
289
290 return 0;
291 }
292
293 static int __init
294 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
295 const unsigned long end)
296 {
297 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
298
299 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
300
301 if (BAD_MADT_ENTRY(x2apic_nmi, end))
302 return -EINVAL;
303
304 acpi_table_print_madt_entry(header);
305
306 if (x2apic_nmi->lint != 1)
307 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
308
309 return 0;
310 }
311
312 static int __init
313 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
314 {
315 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
316
317 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
318
319 if (BAD_MADT_ENTRY(lapic_nmi, end))
320 return -EINVAL;
321
322 acpi_table_print_madt_entry(header);
323
324 if (lapic_nmi->lint != 1)
325 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
326
327 return 0;
328 }
329
330 #endif /*CONFIG_X86_LOCAL_APIC */
331
332 #ifdef CONFIG_X86_IO_APIC
333 #define MP_ISA_BUS 0
334
335 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
336 u32 gsi)
337 {
338 int ioapic;
339 int pin;
340 struct mpc_intsrc mp_irq;
341
342 /*
343 * Convert 'gsi' to 'ioapic.pin'.
344 */
345 ioapic = mp_find_ioapic(gsi);
346 if (ioapic < 0)
347 return;
348 pin = mp_find_ioapic_pin(ioapic, gsi);
349
350 /*
351 * TBD: This check is for faulty timer entries, where the override
352 * erroneously sets the trigger to level, resulting in a HUGE
353 * increase of timer interrupts!
354 */
355 if ((bus_irq == 0) && (trigger == 3))
356 trigger = 1;
357
358 mp_irq.type = MP_INTSRC;
359 mp_irq.irqtype = mp_INT;
360 mp_irq.irqflag = (trigger << 2) | polarity;
361 mp_irq.srcbus = MP_ISA_BUS;
362 mp_irq.srcbusirq = bus_irq; /* IRQ */
363 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
364 mp_irq.dstirq = pin; /* INTIN# */
365
366 mp_save_irq(&mp_irq);
367
368 /*
369 * Reset default identity mapping if gsi is also an legacy IRQ,
370 * otherwise there will be more than one entry with the same GSI
371 * and acpi_isa_irq_to_gsi() may give wrong result.
372 */
373 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
374 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
375 isa_irq_to_gsi[bus_irq] = gsi;
376 }
377
378 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
379 int polarity)
380 {
381 #ifdef CONFIG_X86_MPPARSE
382 struct mpc_intsrc mp_irq;
383 struct pci_dev *pdev;
384 unsigned char number;
385 unsigned int devfn;
386 int ioapic;
387 u8 pin;
388
389 if (!acpi_ioapic)
390 return 0;
391 if (!dev || !dev_is_pci(dev))
392 return 0;
393
394 pdev = to_pci_dev(dev);
395 number = pdev->bus->number;
396 devfn = pdev->devfn;
397 pin = pdev->pin;
398 /* print the entry should happen on mptable identically */
399 mp_irq.type = MP_INTSRC;
400 mp_irq.irqtype = mp_INT;
401 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
402 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
403 mp_irq.srcbus = number;
404 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
405 ioapic = mp_find_ioapic(gsi);
406 mp_irq.dstapic = mpc_ioapic_id(ioapic);
407 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
408
409 mp_save_irq(&mp_irq);
410 #endif
411 return 0;
412 }
413
414 static int __init
415 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
416 {
417 struct acpi_madt_io_apic *ioapic = NULL;
418 struct ioapic_domain_cfg cfg = {
419 .type = IOAPIC_DOMAIN_DYNAMIC,
420 .ops = &mp_ioapic_irqdomain_ops,
421 };
422
423 ioapic = (struct acpi_madt_io_apic *)header;
424
425 if (BAD_MADT_ENTRY(ioapic, end))
426 return -EINVAL;
427
428 acpi_table_print_madt_entry(header);
429
430 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
431 if (ioapic->global_irq_base < nr_legacy_irqs())
432 cfg.type = IOAPIC_DOMAIN_LEGACY;
433
434 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
435 &cfg);
436
437 return 0;
438 }
439
440 /*
441 * Parse Interrupt Source Override for the ACPI SCI
442 */
443 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
444 {
445 if (trigger == 0) /* compatible SCI trigger is level */
446 trigger = 3;
447
448 if (polarity == 0) /* compatible SCI polarity is low */
449 polarity = 3;
450
451 /* Command-line over-ride via acpi_sci= */
452 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
453 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
454
455 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
456 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
457
458 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
459 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
460
461 /*
462 * stash over-ride to indicate we've been here
463 * and for later update of acpi_gbl_FADT
464 */
465 acpi_sci_override_gsi = gsi;
466 return;
467 }
468
469 static int __init
470 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
471 const unsigned long end)
472 {
473 struct acpi_madt_interrupt_override *intsrc = NULL;
474
475 intsrc = (struct acpi_madt_interrupt_override *)header;
476
477 if (BAD_MADT_ENTRY(intsrc, end))
478 return -EINVAL;
479
480 acpi_table_print_madt_entry(header);
481
482 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
483 acpi_sci_ioapic_setup(intsrc->source_irq,
484 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
485 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
486 intsrc->global_irq);
487 return 0;
488 }
489
490 if (intsrc->source_irq == 0) {
491 if (acpi_skip_timer_override) {
492 printk(PREFIX "BIOS IRQ0 override ignored.\n");
493 return 0;
494 }
495
496 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
497 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
498 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
499 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
500 }
501 }
502
503 mp_override_legacy_irq(intsrc->source_irq,
504 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
505 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
506 intsrc->global_irq);
507
508 return 0;
509 }
510
511 static int __init
512 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
513 {
514 struct acpi_madt_nmi_source *nmi_src = NULL;
515
516 nmi_src = (struct acpi_madt_nmi_source *)header;
517
518 if (BAD_MADT_ENTRY(nmi_src, end))
519 return -EINVAL;
520
521 acpi_table_print_madt_entry(header);
522
523 /* TBD: Support nimsrc entries? */
524
525 return 0;
526 }
527
528 #endif /* CONFIG_X86_IO_APIC */
529
530 /*
531 * acpi_pic_sci_set_trigger()
532 *
533 * use ELCR to set PIC-mode trigger type for SCI
534 *
535 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
536 * it may require Edge Trigger -- use "acpi_sci=edge"
537 *
538 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
539 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
540 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
541 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
542 */
543
544 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
545 {
546 unsigned int mask = 1 << irq;
547 unsigned int old, new;
548
549 /* Real old ELCR mask */
550 old = inb(0x4d0) | (inb(0x4d1) << 8);
551
552 /*
553 * If we use ACPI to set PCI IRQs, then we should clear ELCR
554 * since we will set it correctly as we enable the PCI irq
555 * routing.
556 */
557 new = acpi_noirq ? old : 0;
558
559 /*
560 * Update SCI information in the ELCR, it isn't in the PCI
561 * routing tables..
562 */
563 switch (trigger) {
564 case 1: /* Edge - clear */
565 new &= ~mask;
566 break;
567 case 3: /* Level - set */
568 new |= mask;
569 break;
570 }
571
572 if (old == new)
573 return;
574
575 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
576 outb(new, 0x4d0);
577 outb(new >> 8, 0x4d1);
578 }
579
580 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
581 {
582 int rc, irq, trigger, polarity;
583
584 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
585 *irqp = gsi;
586 return 0;
587 }
588
589 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
590 if (rc == 0) {
591 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
592 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
593 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
594 if (irq >= 0) {
595 *irqp = irq;
596 return 0;
597 }
598 }
599
600 return -1;
601 }
602 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
603
604 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
605 {
606 if (isa_irq < nr_legacy_irqs() &&
607 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
608 *gsi = isa_irq_to_gsi[isa_irq];
609 return 0;
610 }
611
612 return -1;
613 }
614
615 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
616 int trigger, int polarity)
617 {
618 #ifdef CONFIG_PCI
619 /*
620 * Make sure all (legacy) PCI IRQs are set as level-triggered.
621 */
622 if (trigger == ACPI_LEVEL_SENSITIVE)
623 elcr_set_level_irq(gsi);
624 #endif
625
626 return gsi;
627 }
628
629 #ifdef CONFIG_X86_LOCAL_APIC
630 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
631 int trigger, int polarity)
632 {
633 int irq = gsi;
634 #ifdef CONFIG_X86_IO_APIC
635 int node;
636 struct irq_alloc_info info;
637
638 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
639 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
640 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
641 ioapic_set_alloc_attr(&info, node, trigger, polarity);
642
643 mutex_lock(&acpi_ioapic_lock);
644 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
645 /* Don't set up the ACPI SCI because it's already set up */
646 if (irq >= 0 && enable_update_mptable &&
647 acpi_gbl_FADT.sci_interrupt != gsi)
648 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
649 mutex_unlock(&acpi_ioapic_lock);
650 #endif
651
652 return irq;
653 }
654
655 static void acpi_unregister_gsi_ioapic(u32 gsi)
656 {
657 #ifdef CONFIG_X86_IO_APIC
658 int irq;
659
660 mutex_lock(&acpi_ioapic_lock);
661 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
662 if (irq > 0)
663 mp_unmap_irq(irq);
664 mutex_unlock(&acpi_ioapic_lock);
665 #endif
666 }
667 #endif
668
669 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
670 int trigger, int polarity) = acpi_register_gsi_pic;
671 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
672
673 #ifdef CONFIG_ACPI_SLEEP
674 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
675 #else
676 int (*acpi_suspend_lowlevel)(void);
677 #endif
678
679 /*
680 * success: return IRQ number (>=0)
681 * failure: return < 0
682 */
683 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
684 {
685 return __acpi_register_gsi(dev, gsi, trigger, polarity);
686 }
687 EXPORT_SYMBOL_GPL(acpi_register_gsi);
688
689 void acpi_unregister_gsi(u32 gsi)
690 {
691 if (__acpi_unregister_gsi)
692 __acpi_unregister_gsi(gsi);
693 }
694 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
695
696 #ifdef CONFIG_X86_LOCAL_APIC
697 static void __init acpi_set_irq_model_ioapic(void)
698 {
699 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
700 __acpi_register_gsi = acpi_register_gsi_ioapic;
701 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
702 acpi_ioapic = 1;
703 }
704 #endif
705
706 /*
707 * ACPI based hotplug support for CPU
708 */
709 #ifdef CONFIG_ACPI_HOTPLUG_CPU
710 #include <acpi/processor.h>
711
712 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
713 {
714 #ifdef CONFIG_ACPI_NUMA
715 int nid;
716
717 nid = acpi_get_node(handle);
718 if (nid != NUMA_NO_NODE) {
719 set_apicid_to_node(physid, nid);
720 numa_set_node(cpu, nid);
721 }
722 #endif
723 return 0;
724 }
725
726 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
727 int *pcpu)
728 {
729 int cpu;
730
731 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
732 if (cpu < 0) {
733 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
734 return cpu;
735 }
736
737 acpi_processor_set_pdc(handle);
738 acpi_map_cpu2node(handle, cpu, physid);
739
740 *pcpu = cpu;
741 return 0;
742 }
743 EXPORT_SYMBOL(acpi_map_cpu);
744
745 int acpi_unmap_cpu(int cpu)
746 {
747 #ifdef CONFIG_ACPI_NUMA
748 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
749 #endif
750
751 per_cpu(x86_cpu_to_apicid, cpu) = -1;
752 set_cpu_present(cpu, false);
753 num_processors--;
754
755 return (0);
756 }
757 EXPORT_SYMBOL(acpi_unmap_cpu);
758 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
759
760 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
761 {
762 int ret = -ENOSYS;
763 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
764 int ioapic_id;
765 u64 addr;
766 struct ioapic_domain_cfg cfg = {
767 .type = IOAPIC_DOMAIN_DYNAMIC,
768 .ops = &mp_ioapic_irqdomain_ops,
769 };
770
771 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
772 if (ioapic_id < 0) {
773 unsigned long long uid;
774 acpi_status status;
775
776 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
777 NULL, &uid);
778 if (ACPI_FAILURE(status)) {
779 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
780 return -EINVAL;
781 }
782 ioapic_id = (int)uid;
783 }
784
785 mutex_lock(&acpi_ioapic_lock);
786 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
787 mutex_unlock(&acpi_ioapic_lock);
788 #endif
789
790 return ret;
791 }
792 EXPORT_SYMBOL(acpi_register_ioapic);
793
794 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
795 {
796 int ret = -ENOSYS;
797
798 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
799 mutex_lock(&acpi_ioapic_lock);
800 ret = mp_unregister_ioapic(gsi_base);
801 mutex_unlock(&acpi_ioapic_lock);
802 #endif
803
804 return ret;
805 }
806 EXPORT_SYMBOL(acpi_unregister_ioapic);
807
808 /**
809 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
810 * has been registered
811 * @handle: ACPI handle of the IOAPIC deivce
812 * @gsi_base: GSI base associated with the IOAPIC
813 *
814 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
815 * with acpi_register_ioapic()/acpi_unregister_ioapic().
816 */
817 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
818 {
819 int ret = 0;
820
821 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
822 mutex_lock(&acpi_ioapic_lock);
823 ret = mp_ioapic_registered(gsi_base);
824 mutex_unlock(&acpi_ioapic_lock);
825 #endif
826
827 return ret;
828 }
829
830 static int __init acpi_parse_sbf(struct acpi_table_header *table)
831 {
832 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
833
834 sbf_port = sb->cmos_index; /* Save CMOS port */
835
836 return 0;
837 }
838
839 #ifdef CONFIG_HPET_TIMER
840 #include <asm/hpet.h>
841
842 static struct resource *hpet_res __initdata;
843
844 static int __init acpi_parse_hpet(struct acpi_table_header *table)
845 {
846 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
847
848 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
849 printk(KERN_WARNING PREFIX "HPET timers must be located in "
850 "memory.\n");
851 return -1;
852 }
853
854 hpet_address = hpet_tbl->address.address;
855 hpet_blockid = hpet_tbl->sequence;
856
857 /*
858 * Some broken BIOSes advertise HPET at 0x0. We really do not
859 * want to allocate a resource there.
860 */
861 if (!hpet_address) {
862 printk(KERN_WARNING PREFIX
863 "HPET id: %#x base: %#lx is invalid\n",
864 hpet_tbl->id, hpet_address);
865 return 0;
866 }
867 #ifdef CONFIG_X86_64
868 /*
869 * Some even more broken BIOSes advertise HPET at
870 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
871 * some noise:
872 */
873 if (hpet_address == 0xfed0000000000000UL) {
874 if (!hpet_force_user) {
875 printk(KERN_WARNING PREFIX "HPET id: %#x "
876 "base: 0xfed0000000000000 is bogus\n "
877 "try hpet=force on the kernel command line to "
878 "fix it up to 0xfed00000.\n", hpet_tbl->id);
879 hpet_address = 0;
880 return 0;
881 }
882 printk(KERN_WARNING PREFIX
883 "HPET id: %#x base: 0xfed0000000000000 fixed up "
884 "to 0xfed00000.\n", hpet_tbl->id);
885 hpet_address >>= 32;
886 }
887 #endif
888 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
889 hpet_tbl->id, hpet_address);
890
891 /*
892 * Allocate and initialize the HPET firmware resource for adding into
893 * the resource tree during the lateinit timeframe.
894 */
895 #define HPET_RESOURCE_NAME_SIZE 9
896 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
897
898 hpet_res->name = (void *)&hpet_res[1];
899 hpet_res->flags = IORESOURCE_MEM;
900 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
901 hpet_tbl->sequence);
902
903 hpet_res->start = hpet_address;
904 hpet_res->end = hpet_address + (1 * 1024) - 1;
905
906 return 0;
907 }
908
909 /*
910 * hpet_insert_resource inserts the HPET resources used into the resource
911 * tree.
912 */
913 static __init int hpet_insert_resource(void)
914 {
915 if (!hpet_res)
916 return 1;
917
918 return insert_resource(&iomem_resource, hpet_res);
919 }
920
921 late_initcall(hpet_insert_resource);
922
923 #else
924 #define acpi_parse_hpet NULL
925 #endif
926
927 static int __init acpi_parse_fadt(struct acpi_table_header *table)
928 {
929 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
930 pr_debug("ACPI: no legacy devices present\n");
931 x86_platform.legacy.devices.pnpbios = 0;
932 }
933
934 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
935 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
936 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
937 pr_debug("ACPI: i8042 controller is absent\n");
938 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
939 }
940
941 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
942 pr_debug("ACPI: not registering RTC platform device\n");
943 x86_platform.legacy.rtc = 0;
944 }
945
946 #ifdef CONFIG_X86_PM_TIMER
947 /* detect the location of the ACPI PM Timer */
948 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
949 /* FADT rev. 2 */
950 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
951 ACPI_ADR_SPACE_SYSTEM_IO)
952 return 0;
953
954 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
955 /*
956 * "X" fields are optional extensions to the original V1.0
957 * fields, so we must selectively expand V1.0 fields if the
958 * corresponding X field is zero.
959 */
960 if (!pmtmr_ioport)
961 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
962 } else {
963 /* FADT rev. 1 */
964 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
965 }
966 if (pmtmr_ioport)
967 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
968 pmtmr_ioport);
969 #endif
970 return 0;
971 }
972
973 #ifdef CONFIG_X86_LOCAL_APIC
974 /*
975 * Parse LAPIC entries in MADT
976 * returns 0 on success, < 0 on error
977 */
978
979 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
980 {
981 int count;
982
983 if (!boot_cpu_has(X86_FEATURE_APIC))
984 return -ENODEV;
985
986 /*
987 * Note that the LAPIC address is obtained from the MADT (32-bit value)
988 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
989 */
990
991 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
992 acpi_parse_lapic_addr_ovr, 0);
993 if (count < 0) {
994 printk(KERN_ERR PREFIX
995 "Error parsing LAPIC address override entry\n");
996 return count;
997 }
998
999 register_lapic_address(acpi_lapic_addr);
1000
1001 return count;
1002 }
1003
1004 static int __init acpi_parse_madt_lapic_entries(void)
1005 {
1006 int count;
1007 int x2count = 0;
1008 int ret;
1009 struct acpi_subtable_proc madt_proc[2];
1010
1011 if (!boot_cpu_has(X86_FEATURE_APIC))
1012 return -ENODEV;
1013
1014 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1015 acpi_parse_sapic, MAX_LOCAL_APIC);
1016
1017 if (!count) {
1018 memset(madt_proc, 0, sizeof(madt_proc));
1019 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1020 madt_proc[0].handler = acpi_parse_lapic;
1021 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1022 madt_proc[1].handler = acpi_parse_x2apic;
1023 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1024 sizeof(struct acpi_table_madt),
1025 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1026 if (ret < 0) {
1027 printk(KERN_ERR PREFIX
1028 "Error parsing LAPIC/X2APIC entries\n");
1029 return ret;
1030 }
1031
1032 count = madt_proc[0].count;
1033 x2count = madt_proc[1].count;
1034 }
1035 if (!count && !x2count) {
1036 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1037 /* TBD: Cleanup to allow fallback to MPS */
1038 return -ENODEV;
1039 } else if (count < 0 || x2count < 0) {
1040 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1041 /* TBD: Cleanup to allow fallback to MPS */
1042 return count;
1043 }
1044
1045 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1046 acpi_parse_x2apic_nmi, 0);
1047 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1048 acpi_parse_lapic_nmi, 0);
1049 if (count < 0 || x2count < 0) {
1050 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1051 /* TBD: Cleanup to allow fallback to MPS */
1052 return count;
1053 }
1054 return 0;
1055 }
1056 #endif /* CONFIG_X86_LOCAL_APIC */
1057
1058 #ifdef CONFIG_X86_IO_APIC
1059 static void __init mp_config_acpi_legacy_irqs(void)
1060 {
1061 int i;
1062 struct mpc_intsrc mp_irq;
1063
1064 #ifdef CONFIG_EISA
1065 /*
1066 * Fabricate the legacy ISA bus (bus #31).
1067 */
1068 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1069 #endif
1070 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1071 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1072
1073 /*
1074 * Use the default configuration for the IRQs 0-15. Unless
1075 * overridden by (MADT) interrupt source override entries.
1076 */
1077 for (i = 0; i < nr_legacy_irqs(); i++) {
1078 int ioapic, pin;
1079 unsigned int dstapic;
1080 int idx;
1081 u32 gsi;
1082
1083 /* Locate the gsi that irq i maps to. */
1084 if (acpi_isa_irq_to_gsi(i, &gsi))
1085 continue;
1086
1087 /*
1088 * Locate the IOAPIC that manages the ISA IRQ.
1089 */
1090 ioapic = mp_find_ioapic(gsi);
1091 if (ioapic < 0)
1092 continue;
1093 pin = mp_find_ioapic_pin(ioapic, gsi);
1094 dstapic = mpc_ioapic_id(ioapic);
1095
1096 for (idx = 0; idx < mp_irq_entries; idx++) {
1097 struct mpc_intsrc *irq = mp_irqs + idx;
1098
1099 /* Do we already have a mapping for this ISA IRQ? */
1100 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1101 break;
1102
1103 /* Do we already have a mapping for this IOAPIC pin */
1104 if (irq->dstapic == dstapic && irq->dstirq == pin)
1105 break;
1106 }
1107
1108 if (idx != mp_irq_entries) {
1109 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1110 continue; /* IRQ already used */
1111 }
1112
1113 mp_irq.type = MP_INTSRC;
1114 mp_irq.irqflag = 0; /* Conforming */
1115 mp_irq.srcbus = MP_ISA_BUS;
1116 mp_irq.dstapic = dstapic;
1117 mp_irq.irqtype = mp_INT;
1118 mp_irq.srcbusirq = i; /* Identity mapped */
1119 mp_irq.dstirq = pin;
1120
1121 mp_save_irq(&mp_irq);
1122 }
1123 }
1124
1125 /*
1126 * Parse IOAPIC related entries in MADT
1127 * returns 0 on success, < 0 on error
1128 */
1129 static int __init acpi_parse_madt_ioapic_entries(void)
1130 {
1131 int count;
1132
1133 /*
1134 * ACPI interpreter is required to complete interrupt setup,
1135 * so if it is off, don't enumerate the io-apics with ACPI.
1136 * If MPS is present, it will handle them,
1137 * otherwise the system will stay in PIC mode
1138 */
1139 if (acpi_disabled || acpi_noirq)
1140 return -ENODEV;
1141
1142 if (!boot_cpu_has(X86_FEATURE_APIC))
1143 return -ENODEV;
1144
1145 /*
1146 * if "noapic" boot option, don't look for IO-APICs
1147 */
1148 if (skip_ioapic_setup) {
1149 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1150 "due to 'noapic' option.\n");
1151 return -ENODEV;
1152 }
1153
1154 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1155 MAX_IO_APICS);
1156 if (!count) {
1157 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1158 return -ENODEV;
1159 } else if (count < 0) {
1160 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1161 return count;
1162 }
1163
1164 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1165 acpi_parse_int_src_ovr, nr_irqs);
1166 if (count < 0) {
1167 printk(KERN_ERR PREFIX
1168 "Error parsing interrupt source overrides entry\n");
1169 /* TBD: Cleanup to allow fallback to MPS */
1170 return count;
1171 }
1172
1173 /*
1174 * If BIOS did not supply an INT_SRC_OVR for the SCI
1175 * pretend we got one so we can set the SCI flags.
1176 */
1177 if (!acpi_sci_override_gsi)
1178 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1179 acpi_gbl_FADT.sci_interrupt);
1180
1181 /* Fill in identity legacy mappings where no override */
1182 mp_config_acpi_legacy_irqs();
1183
1184 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1185 acpi_parse_nmi_src, nr_irqs);
1186 if (count < 0) {
1187 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1188 /* TBD: Cleanup to allow fallback to MPS */
1189 return count;
1190 }
1191
1192 return 0;
1193 }
1194 #else
1195 static inline int acpi_parse_madt_ioapic_entries(void)
1196 {
1197 return -1;
1198 }
1199 #endif /* !CONFIG_X86_IO_APIC */
1200
1201 static void __init early_acpi_process_madt(void)
1202 {
1203 #ifdef CONFIG_X86_LOCAL_APIC
1204 int error;
1205
1206 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1207
1208 /*
1209 * Parse MADT LAPIC entries
1210 */
1211 error = early_acpi_parse_madt_lapic_addr_ovr();
1212 if (!error) {
1213 acpi_lapic = 1;
1214 smp_found_config = 1;
1215 }
1216 if (error == -EINVAL) {
1217 /*
1218 * Dell Precision Workstation 410, 610 come here.
1219 */
1220 printk(KERN_ERR PREFIX
1221 "Invalid BIOS MADT, disabling ACPI\n");
1222 disable_acpi();
1223 }
1224 }
1225 #endif
1226 }
1227
1228 static void __init acpi_process_madt(void)
1229 {
1230 #ifdef CONFIG_X86_LOCAL_APIC
1231 int error;
1232
1233 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1234
1235 /*
1236 * Parse MADT LAPIC entries
1237 */
1238 error = acpi_parse_madt_lapic_entries();
1239 if (!error) {
1240 acpi_lapic = 1;
1241
1242 /*
1243 * Parse MADT IO-APIC entries
1244 */
1245 mutex_lock(&acpi_ioapic_lock);
1246 error = acpi_parse_madt_ioapic_entries();
1247 mutex_unlock(&acpi_ioapic_lock);
1248 if (!error) {
1249 acpi_set_irq_model_ioapic();
1250
1251 smp_found_config = 1;
1252 }
1253 }
1254 if (error == -EINVAL) {
1255 /*
1256 * Dell Precision Workstation 410, 610 come here.
1257 */
1258 printk(KERN_ERR PREFIX
1259 "Invalid BIOS MADT, disabling ACPI\n");
1260 disable_acpi();
1261 }
1262 } else {
1263 /*
1264 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1265 * In the event an MPS table was found, forget it.
1266 * Boot with "acpi=off" to use MPS on such a system.
1267 */
1268 if (smp_found_config) {
1269 printk(KERN_WARNING PREFIX
1270 "No APIC-table, disabling MPS\n");
1271 smp_found_config = 0;
1272 }
1273 }
1274
1275 /*
1276 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1277 * processors, where MPS only supports physical.
1278 */
1279 if (acpi_lapic && acpi_ioapic)
1280 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1281 "information\n");
1282 else if (acpi_lapic)
1283 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1284 "configuration information\n");
1285 #endif
1286 return;
1287 }
1288
1289 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1290 {
1291 if (!acpi_force) {
1292 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1293 d->ident);
1294 acpi_noirq_set();
1295 }
1296 return 0;
1297 }
1298
1299 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1300 {
1301 if (!acpi_force) {
1302 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1303 d->ident);
1304 acpi_disable_pci();
1305 }
1306 return 0;
1307 }
1308
1309 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1310 {
1311 if (!acpi_force) {
1312 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1313 disable_acpi();
1314 } else {
1315 printk(KERN_NOTICE
1316 "Warning: DMI blacklist says broken, but acpi forced\n");
1317 }
1318 return 0;
1319 }
1320
1321 /*
1322 * Force ignoring BIOS IRQ0 override
1323 */
1324 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1325 {
1326 if (!acpi_skip_timer_override) {
1327 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1328 d->ident);
1329 acpi_skip_timer_override = 1;
1330 }
1331 return 0;
1332 }
1333
1334 /*
1335 * ACPI offers an alternative platform interface model that removes
1336 * ACPI hardware requirements for platforms that do not implement
1337 * the PC Architecture.
1338 *
1339 * We initialize the Hardware-reduced ACPI model here:
1340 */
1341 static void __init acpi_reduced_hw_init(void)
1342 {
1343 if (acpi_gbl_reduced_hardware) {
1344 /*
1345 * Override x86_init functions and bypass legacy pic
1346 * in Hardware-reduced ACPI mode
1347 */
1348 x86_init.timers.timer_init = x86_init_noop;
1349 x86_init.irqs.pre_vector_init = x86_init_noop;
1350 legacy_pic = &null_legacy_pic;
1351 }
1352 }
1353
1354 /*
1355 * If your system is blacklisted here, but you find that acpi=force
1356 * works for you, please contact linux-acpi@vger.kernel.org
1357 */
1358 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1359 /*
1360 * Boxes that need ACPI disabled
1361 */
1362 {
1363 .callback = dmi_disable_acpi,
1364 .ident = "IBM Thinkpad",
1365 .matches = {
1366 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1367 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1368 },
1369 },
1370
1371 /*
1372 * Boxes that need ACPI PCI IRQ routing disabled
1373 */
1374 {
1375 .callback = disable_acpi_irq,
1376 .ident = "ASUS A7V",
1377 .matches = {
1378 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1379 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1380 /* newer BIOS, Revision 1011, does work */
1381 DMI_MATCH(DMI_BIOS_VERSION,
1382 "ASUS A7V ACPI BIOS Revision 1007"),
1383 },
1384 },
1385 {
1386 /*
1387 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1388 * for LPC bridge, which is needed for the PCI
1389 * interrupt links to work. DSDT fix is in bug 5966.
1390 * 2645, 2646 model numbers are shared with 600/600E/600X
1391 */
1392 .callback = disable_acpi_irq,
1393 .ident = "IBM Thinkpad 600 Series 2645",
1394 .matches = {
1395 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1396 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1397 },
1398 },
1399 {
1400 .callback = disable_acpi_irq,
1401 .ident = "IBM Thinkpad 600 Series 2646",
1402 .matches = {
1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1404 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1405 },
1406 },
1407 /*
1408 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1409 */
1410 { /* _BBN 0 bug */
1411 .callback = disable_acpi_pci,
1412 .ident = "ASUS PR-DLS",
1413 .matches = {
1414 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1415 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1416 DMI_MATCH(DMI_BIOS_VERSION,
1417 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1418 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1419 },
1420 },
1421 {
1422 .callback = disable_acpi_pci,
1423 .ident = "Acer TravelMate 36x Laptop",
1424 .matches = {
1425 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1426 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1427 },
1428 },
1429 {}
1430 };
1431
1432 /* second table for DMI checks that should run after early-quirks */
1433 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1434 /*
1435 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1436 * which includes some code which overrides all temperature
1437 * trip points to 16C if the INTIN2 input of the I/O APIC
1438 * is enabled. This input is incorrectly designated the
1439 * ISA IRQ 0 via an interrupt source override even though
1440 * it is wired to the output of the master 8259A and INTIN0
1441 * is not connected at all. Force ignoring BIOS IRQ0
1442 * override in that cases.
1443 */
1444 {
1445 .callback = dmi_ignore_irq0_timer_override,
1446 .ident = "HP nx6115 laptop",
1447 .matches = {
1448 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1449 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1450 },
1451 },
1452 {
1453 .callback = dmi_ignore_irq0_timer_override,
1454 .ident = "HP NX6125 laptop",
1455 .matches = {
1456 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1457 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1458 },
1459 },
1460 {
1461 .callback = dmi_ignore_irq0_timer_override,
1462 .ident = "HP NX6325 laptop",
1463 .matches = {
1464 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1465 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1466 },
1467 },
1468 {
1469 .callback = dmi_ignore_irq0_timer_override,
1470 .ident = "HP 6715b laptop",
1471 .matches = {
1472 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1473 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1474 },
1475 },
1476 {
1477 .callback = dmi_ignore_irq0_timer_override,
1478 .ident = "FUJITSU SIEMENS",
1479 .matches = {
1480 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1481 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1482 },
1483 },
1484 {}
1485 };
1486
1487 /*
1488 * acpi_boot_table_init() and acpi_boot_init()
1489 * called from setup_arch(), always.
1490 * 1. checksums all tables
1491 * 2. enumerates lapics
1492 * 3. enumerates io-apics
1493 *
1494 * acpi_table_init() is separate to allow reading SRAT without
1495 * other side effects.
1496 *
1497 * side effects of acpi_boot_init:
1498 * acpi_lapic = 1 if LAPIC found
1499 * acpi_ioapic = 1 if IOAPIC found
1500 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1501 * if acpi_blacklisted() acpi_disabled = 1;
1502 * acpi_irq_model=...
1503 * ...
1504 */
1505
1506 void __init acpi_boot_table_init(void)
1507 {
1508 dmi_check_system(acpi_dmi_table);
1509
1510 /*
1511 * If acpi_disabled, bail out
1512 */
1513 if (acpi_disabled)
1514 return;
1515
1516 /*
1517 * Initialize the ACPI boot-time table parser.
1518 */
1519 if (acpi_table_init()) {
1520 disable_acpi();
1521 return;
1522 }
1523
1524 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1525
1526 /*
1527 * blacklist may disable ACPI entirely
1528 */
1529 if (acpi_blacklisted()) {
1530 if (acpi_force) {
1531 printk(KERN_WARNING PREFIX "acpi=force override\n");
1532 } else {
1533 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1534 disable_acpi();
1535 return;
1536 }
1537 }
1538 }
1539
1540 int __init early_acpi_boot_init(void)
1541 {
1542 /*
1543 * If acpi_disabled, bail out
1544 */
1545 if (acpi_disabled)
1546 return 1;
1547
1548 /*
1549 * Process the Multiple APIC Description Table (MADT), if present
1550 */
1551 early_acpi_process_madt();
1552
1553 /*
1554 * Hardware-reduced ACPI mode initialization:
1555 */
1556 acpi_reduced_hw_init();
1557
1558 return 0;
1559 }
1560
1561 int __init acpi_boot_init(void)
1562 {
1563 /* those are executed after early-quirks are executed */
1564 dmi_check_system(acpi_dmi_table_late);
1565
1566 /*
1567 * If acpi_disabled, bail out
1568 */
1569 if (acpi_disabled)
1570 return 1;
1571
1572 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1573
1574 /*
1575 * set sci_int and PM timer address
1576 */
1577 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1578
1579 /*
1580 * Process the Multiple APIC Description Table (MADT), if present
1581 */
1582 acpi_process_madt();
1583
1584 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1585
1586 if (!acpi_noirq)
1587 x86_init.pci.init = pci_acpi_init;
1588
1589 return 0;
1590 }
1591
1592 static int __init parse_acpi(char *arg)
1593 {
1594 if (!arg)
1595 return -EINVAL;
1596
1597 /* "acpi=off" disables both ACPI table parsing and interpreter */
1598 if (strcmp(arg, "off") == 0) {
1599 disable_acpi();
1600 }
1601 /* acpi=force to over-ride black-list */
1602 else if (strcmp(arg, "force") == 0) {
1603 acpi_force = 1;
1604 acpi_disabled = 0;
1605 }
1606 /* acpi=strict disables out-of-spec workarounds */
1607 else if (strcmp(arg, "strict") == 0) {
1608 acpi_strict = 1;
1609 }
1610 /* acpi=rsdt use RSDT instead of XSDT */
1611 else if (strcmp(arg, "rsdt") == 0) {
1612 acpi_gbl_do_not_use_xsdt = TRUE;
1613 }
1614 /* "acpi=noirq" disables ACPI interrupt routing */
1615 else if (strcmp(arg, "noirq") == 0) {
1616 acpi_noirq_set();
1617 }
1618 /* "acpi=copy_dsdt" copys DSDT */
1619 else if (strcmp(arg, "copy_dsdt") == 0) {
1620 acpi_gbl_copy_dsdt_locally = 1;
1621 }
1622 /* "acpi=nocmcff" disables FF mode for corrected errors */
1623 else if (strcmp(arg, "nocmcff") == 0) {
1624 acpi_disable_cmcff = 1;
1625 } else {
1626 /* Core will printk when we return error. */
1627 return -EINVAL;
1628 }
1629 return 0;
1630 }
1631 early_param("acpi", parse_acpi);
1632
1633 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1634 static int __init parse_pci(char *arg)
1635 {
1636 if (arg && strcmp(arg, "noacpi") == 0)
1637 acpi_disable_pci();
1638 return 0;
1639 }
1640 early_param("pci", parse_pci);
1641
1642 int __init acpi_mps_check(void)
1643 {
1644 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1645 /* mptable code is not built-in*/
1646 if (acpi_disabled || acpi_noirq) {
1647 printk(KERN_WARNING "MPS support code is not built-in.\n"
1648 "Using acpi=off or acpi=noirq or pci=noacpi "
1649 "may have problem\n");
1650 return 1;
1651 }
1652 #endif
1653 return 0;
1654 }
1655
1656 #ifdef CONFIG_X86_IO_APIC
1657 static int __init parse_acpi_skip_timer_override(char *arg)
1658 {
1659 acpi_skip_timer_override = 1;
1660 return 0;
1661 }
1662 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1663
1664 static int __init parse_acpi_use_timer_override(char *arg)
1665 {
1666 acpi_use_timer_override = 1;
1667 return 0;
1668 }
1669 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1670 #endif /* CONFIG_X86_IO_APIC */
1671
1672 static int __init setup_acpi_sci(char *s)
1673 {
1674 if (!s)
1675 return -EINVAL;
1676 if (!strcmp(s, "edge"))
1677 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1678 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1679 else if (!strcmp(s, "level"))
1680 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1681 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1682 else if (!strcmp(s, "high"))
1683 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1684 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1685 else if (!strcmp(s, "low"))
1686 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1687 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1688 else
1689 return -EINVAL;
1690 return 0;
1691 }
1692 early_param("acpi_sci", setup_acpi_sci);
1693
1694 int __acpi_acquire_global_lock(unsigned int *lock)
1695 {
1696 unsigned int old, new, val;
1697 do {
1698 old = *lock;
1699 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1700 val = cmpxchg(lock, old, new);
1701 } while (unlikely (val != old));
1702 return (new < 3) ? -1 : 0;
1703 }
1704
1705 int __acpi_release_global_lock(unsigned int *lock)
1706 {
1707 unsigned int old, new, val;
1708 do {
1709 old = *lock;
1710 new = old & ~0x3;
1711 val = cmpxchg(lock, old, new);
1712 } while (unlikely (val != old));
1713 return old & 0x1;
1714 }
1715
1716 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1717 {
1718 e820_add_region(addr, size, E820_ACPI);
1719 update_e820();
1720 }
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