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x86/apic: Get rid of apic_version[] array
[deliverable/linux.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 /*
80 * Locks related to IOAPIC hotplug
81 * Hotplug side:
82 * ->device_hotplug_lock
83 * ->acpi_ioapic_lock
84 * ->ioapic_lock
85 * Interrupt mapping side:
86 * ->acpi_ioapic_lock
87 * ->ioapic_mutex
88 * ->ioapic_lock
89 */
90 static DEFINE_MUTEX(acpi_ioapic_lock);
91
92 /* --------------------------------------------------------------------------
93 Boot-time Configuration
94 -------------------------------------------------------------------------- */
95
96 /*
97 * The default interrupt routing model is PIC (8259). This gets
98 * overridden if IOAPICs are enumerated (below).
99 */
100 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
101
102
103 /*
104 * ISA irqs by default are the first 16 gsis but can be
105 * any gsi as specified by an interrupt source override.
106 */
107 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
109 };
110
111 #define ACPI_INVALID_GSI INT_MIN
112
113 /*
114 * This is just a simple wrapper around early_ioremap(),
115 * with sanity checks for phys == 0 and size == 0.
116 */
117 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
118 {
119
120 if (!phys || !size)
121 return NULL;
122
123 return early_ioremap(phys, size);
124 }
125
126 void __init __acpi_unmap_table(char *map, unsigned long size)
127 {
128 if (!map || !size)
129 return;
130
131 early_iounmap(map, size);
132 }
133
134 #ifdef CONFIG_X86_LOCAL_APIC
135 static int __init acpi_parse_madt(struct acpi_table_header *table)
136 {
137 struct acpi_table_madt *madt = NULL;
138
139 if (!boot_cpu_has(X86_FEATURE_APIC))
140 return -EINVAL;
141
142 madt = (struct acpi_table_madt *)table;
143 if (!madt) {
144 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
145 return -ENODEV;
146 }
147
148 if (madt->address) {
149 acpi_lapic_addr = (u64) madt->address;
150
151 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
152 madt->address);
153 }
154
155 default_acpi_madt_oem_check(madt->header.oem_id,
156 madt->header.oem_table_id);
157
158 return 0;
159 }
160
161 /**
162 * acpi_register_lapic - register a local apic and generates a logic cpu number
163 * @id: local apic id to register
164 * @acpiid: ACPI id to register
165 * @enabled: this cpu is enabled or not
166 *
167 * Returns the logic cpu number which maps to the local apic
168 */
169 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
170 {
171 unsigned int ver = 0;
172 int cpu;
173
174 if (id >= MAX_LOCAL_APIC) {
175 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
176 return -EINVAL;
177 }
178
179 if (!enabled) {
180 ++disabled_cpus;
181 return -EINVAL;
182 }
183
184 if (boot_cpu_physical_apicid != -1U)
185 ver = boot_cpu_apic_version;
186
187 cpu = generic_processor_info(id, ver);
188 if (cpu >= 0)
189 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
190
191 return cpu;
192 }
193
194 static int __init
195 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
196 {
197 struct acpi_madt_local_x2apic *processor = NULL;
198 int apic_id;
199 u8 enabled;
200
201 processor = (struct acpi_madt_local_x2apic *)header;
202
203 if (BAD_MADT_ENTRY(processor, end))
204 return -EINVAL;
205
206 acpi_table_print_madt_entry(header);
207
208 apic_id = processor->local_apic_id;
209 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
210 #ifdef CONFIG_X86_X2APIC
211 /*
212 * We need to register disabled CPU as well to permit
213 * counting disabled CPUs. This allows us to size
214 * cpus_possible_map more accurately, to permit
215 * to not preallocating memory for all NR_CPUS
216 * when we use CPU hotplug.
217 */
218 if (!apic->apic_id_valid(apic_id) && enabled)
219 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
220 else
221 acpi_register_lapic(apic_id, processor->uid, enabled);
222 #else
223 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
224 #endif
225
226 return 0;
227 }
228
229 static int __init
230 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
231 {
232 struct acpi_madt_local_apic *processor = NULL;
233
234 processor = (struct acpi_madt_local_apic *)header;
235
236 if (BAD_MADT_ENTRY(processor, end))
237 return -EINVAL;
238
239 acpi_table_print_madt_entry(header);
240
241 /*
242 * We need to register disabled CPU as well to permit
243 * counting disabled CPUs. This allows us to size
244 * cpus_possible_map more accurately, to permit
245 * to not preallocating memory for all NR_CPUS
246 * when we use CPU hotplug.
247 */
248 acpi_register_lapic(processor->id, /* APIC ID */
249 processor->processor_id, /* ACPI ID */
250 processor->lapic_flags & ACPI_MADT_ENABLED);
251
252 return 0;
253 }
254
255 static int __init
256 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
257 {
258 struct acpi_madt_local_sapic *processor = NULL;
259
260 processor = (struct acpi_madt_local_sapic *)header;
261
262 if (BAD_MADT_ENTRY(processor, end))
263 return -EINVAL;
264
265 acpi_table_print_madt_entry(header);
266
267 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
268 processor->processor_id, /* ACPI ID */
269 processor->lapic_flags & ACPI_MADT_ENABLED);
270
271 return 0;
272 }
273
274 static int __init
275 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
276 const unsigned long end)
277 {
278 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
279
280 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
281
282 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
283 return -EINVAL;
284
285 acpi_lapic_addr = lapic_addr_ovr->address;
286
287 return 0;
288 }
289
290 static int __init
291 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
292 const unsigned long end)
293 {
294 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
295
296 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
297
298 if (BAD_MADT_ENTRY(x2apic_nmi, end))
299 return -EINVAL;
300
301 acpi_table_print_madt_entry(header);
302
303 if (x2apic_nmi->lint != 1)
304 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
305
306 return 0;
307 }
308
309 static int __init
310 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
311 {
312 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
313
314 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
315
316 if (BAD_MADT_ENTRY(lapic_nmi, end))
317 return -EINVAL;
318
319 acpi_table_print_madt_entry(header);
320
321 if (lapic_nmi->lint != 1)
322 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
323
324 return 0;
325 }
326
327 #endif /*CONFIG_X86_LOCAL_APIC */
328
329 #ifdef CONFIG_X86_IO_APIC
330 #define MP_ISA_BUS 0
331
332 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
333 u32 gsi)
334 {
335 int ioapic;
336 int pin;
337 struct mpc_intsrc mp_irq;
338
339 /*
340 * Convert 'gsi' to 'ioapic.pin'.
341 */
342 ioapic = mp_find_ioapic(gsi);
343 if (ioapic < 0)
344 return;
345 pin = mp_find_ioapic_pin(ioapic, gsi);
346
347 /*
348 * TBD: This check is for faulty timer entries, where the override
349 * erroneously sets the trigger to level, resulting in a HUGE
350 * increase of timer interrupts!
351 */
352 if ((bus_irq == 0) && (trigger == 3))
353 trigger = 1;
354
355 mp_irq.type = MP_INTSRC;
356 mp_irq.irqtype = mp_INT;
357 mp_irq.irqflag = (trigger << 2) | polarity;
358 mp_irq.srcbus = MP_ISA_BUS;
359 mp_irq.srcbusirq = bus_irq; /* IRQ */
360 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
361 mp_irq.dstirq = pin; /* INTIN# */
362
363 mp_save_irq(&mp_irq);
364
365 /*
366 * Reset default identity mapping if gsi is also an legacy IRQ,
367 * otherwise there will be more than one entry with the same GSI
368 * and acpi_isa_irq_to_gsi() may give wrong result.
369 */
370 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
371 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
372 isa_irq_to_gsi[bus_irq] = gsi;
373 }
374
375 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
376 int polarity)
377 {
378 #ifdef CONFIG_X86_MPPARSE
379 struct mpc_intsrc mp_irq;
380 struct pci_dev *pdev;
381 unsigned char number;
382 unsigned int devfn;
383 int ioapic;
384 u8 pin;
385
386 if (!acpi_ioapic)
387 return 0;
388 if (!dev || !dev_is_pci(dev))
389 return 0;
390
391 pdev = to_pci_dev(dev);
392 number = pdev->bus->number;
393 devfn = pdev->devfn;
394 pin = pdev->pin;
395 /* print the entry should happen on mptable identically */
396 mp_irq.type = MP_INTSRC;
397 mp_irq.irqtype = mp_INT;
398 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
399 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
400 mp_irq.srcbus = number;
401 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
402 ioapic = mp_find_ioapic(gsi);
403 mp_irq.dstapic = mpc_ioapic_id(ioapic);
404 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
405
406 mp_save_irq(&mp_irq);
407 #endif
408 return 0;
409 }
410
411 static int __init
412 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
413 {
414 struct acpi_madt_io_apic *ioapic = NULL;
415 struct ioapic_domain_cfg cfg = {
416 .type = IOAPIC_DOMAIN_DYNAMIC,
417 .ops = &mp_ioapic_irqdomain_ops,
418 };
419
420 ioapic = (struct acpi_madt_io_apic *)header;
421
422 if (BAD_MADT_ENTRY(ioapic, end))
423 return -EINVAL;
424
425 acpi_table_print_madt_entry(header);
426
427 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
428 if (ioapic->global_irq_base < nr_legacy_irqs())
429 cfg.type = IOAPIC_DOMAIN_LEGACY;
430
431 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
432 &cfg);
433
434 return 0;
435 }
436
437 /*
438 * Parse Interrupt Source Override for the ACPI SCI
439 */
440 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
441 {
442 if (trigger == 0) /* compatible SCI trigger is level */
443 trigger = 3;
444
445 if (polarity == 0) /* compatible SCI polarity is low */
446 polarity = 3;
447
448 /* Command-line over-ride via acpi_sci= */
449 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
450 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
451
452 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
453 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
454
455 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
456
457 /*
458 * stash over-ride to indicate we've been here
459 * and for later update of acpi_gbl_FADT
460 */
461 acpi_sci_override_gsi = gsi;
462 return;
463 }
464
465 static int __init
466 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
467 const unsigned long end)
468 {
469 struct acpi_madt_interrupt_override *intsrc = NULL;
470
471 intsrc = (struct acpi_madt_interrupt_override *)header;
472
473 if (BAD_MADT_ENTRY(intsrc, end))
474 return -EINVAL;
475
476 acpi_table_print_madt_entry(header);
477
478 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
479 acpi_sci_ioapic_setup(intsrc->source_irq,
480 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
481 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
482 intsrc->global_irq);
483 return 0;
484 }
485
486 if (intsrc->source_irq == 0) {
487 if (acpi_skip_timer_override) {
488 printk(PREFIX "BIOS IRQ0 override ignored.\n");
489 return 0;
490 }
491
492 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
493 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
494 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
495 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
496 }
497 }
498
499 mp_override_legacy_irq(intsrc->source_irq,
500 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
501 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
502 intsrc->global_irq);
503
504 return 0;
505 }
506
507 static int __init
508 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
509 {
510 struct acpi_madt_nmi_source *nmi_src = NULL;
511
512 nmi_src = (struct acpi_madt_nmi_source *)header;
513
514 if (BAD_MADT_ENTRY(nmi_src, end))
515 return -EINVAL;
516
517 acpi_table_print_madt_entry(header);
518
519 /* TBD: Support nimsrc entries? */
520
521 return 0;
522 }
523
524 #endif /* CONFIG_X86_IO_APIC */
525
526 /*
527 * acpi_pic_sci_set_trigger()
528 *
529 * use ELCR to set PIC-mode trigger type for SCI
530 *
531 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
532 * it may require Edge Trigger -- use "acpi_sci=edge"
533 *
534 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
535 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
536 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
537 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
538 */
539
540 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
541 {
542 unsigned int mask = 1 << irq;
543 unsigned int old, new;
544
545 /* Real old ELCR mask */
546 old = inb(0x4d0) | (inb(0x4d1) << 8);
547
548 /*
549 * If we use ACPI to set PCI IRQs, then we should clear ELCR
550 * since we will set it correctly as we enable the PCI irq
551 * routing.
552 */
553 new = acpi_noirq ? old : 0;
554
555 /*
556 * Update SCI information in the ELCR, it isn't in the PCI
557 * routing tables..
558 */
559 switch (trigger) {
560 case 1: /* Edge - clear */
561 new &= ~mask;
562 break;
563 case 3: /* Level - set */
564 new |= mask;
565 break;
566 }
567
568 if (old == new)
569 return;
570
571 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
572 outb(new, 0x4d0);
573 outb(new >> 8, 0x4d1);
574 }
575
576 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
577 {
578 int rc, irq, trigger, polarity;
579
580 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
581 *irqp = gsi;
582 return 0;
583 }
584
585 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
586 if (rc == 0) {
587 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
588 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
589 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
590 if (irq >= 0) {
591 *irqp = irq;
592 return 0;
593 }
594 }
595
596 return -1;
597 }
598 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
599
600 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
601 {
602 if (isa_irq < nr_legacy_irqs() &&
603 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
604 *gsi = isa_irq_to_gsi[isa_irq];
605 return 0;
606 }
607
608 return -1;
609 }
610
611 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
612 int trigger, int polarity)
613 {
614 #ifdef CONFIG_PCI
615 /*
616 * Make sure all (legacy) PCI IRQs are set as level-triggered.
617 */
618 if (trigger == ACPI_LEVEL_SENSITIVE)
619 elcr_set_level_irq(gsi);
620 #endif
621
622 return gsi;
623 }
624
625 #ifdef CONFIG_X86_LOCAL_APIC
626 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
627 int trigger, int polarity)
628 {
629 int irq = gsi;
630 #ifdef CONFIG_X86_IO_APIC
631 int node;
632 struct irq_alloc_info info;
633
634 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
635 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
636 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
637 ioapic_set_alloc_attr(&info, node, trigger, polarity);
638
639 mutex_lock(&acpi_ioapic_lock);
640 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
641 /* Don't set up the ACPI SCI because it's already set up */
642 if (irq >= 0 && enable_update_mptable &&
643 acpi_gbl_FADT.sci_interrupt != gsi)
644 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
645 mutex_unlock(&acpi_ioapic_lock);
646 #endif
647
648 return irq;
649 }
650
651 static void acpi_unregister_gsi_ioapic(u32 gsi)
652 {
653 #ifdef CONFIG_X86_IO_APIC
654 int irq;
655
656 mutex_lock(&acpi_ioapic_lock);
657 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
658 if (irq > 0)
659 mp_unmap_irq(irq);
660 mutex_unlock(&acpi_ioapic_lock);
661 #endif
662 }
663 #endif
664
665 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
666 int trigger, int polarity) = acpi_register_gsi_pic;
667 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
668
669 #ifdef CONFIG_ACPI_SLEEP
670 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
671 #else
672 int (*acpi_suspend_lowlevel)(void);
673 #endif
674
675 /*
676 * success: return IRQ number (>=0)
677 * failure: return < 0
678 */
679 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
680 {
681 return __acpi_register_gsi(dev, gsi, trigger, polarity);
682 }
683 EXPORT_SYMBOL_GPL(acpi_register_gsi);
684
685 void acpi_unregister_gsi(u32 gsi)
686 {
687 if (__acpi_unregister_gsi)
688 __acpi_unregister_gsi(gsi);
689 }
690 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
691
692 #ifdef CONFIG_X86_LOCAL_APIC
693 static void __init acpi_set_irq_model_ioapic(void)
694 {
695 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
696 __acpi_register_gsi = acpi_register_gsi_ioapic;
697 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
698 acpi_ioapic = 1;
699 }
700 #endif
701
702 /*
703 * ACPI based hotplug support for CPU
704 */
705 #ifdef CONFIG_ACPI_HOTPLUG_CPU
706 #include <acpi/processor.h>
707
708 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
709 {
710 #ifdef CONFIG_ACPI_NUMA
711 int nid;
712
713 nid = acpi_get_node(handle);
714 if (nid != -1) {
715 set_apicid_to_node(physid, nid);
716 numa_set_node(cpu, nid);
717 }
718 #endif
719 }
720
721 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
722 {
723 int cpu;
724
725 cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
726 if (cpu < 0) {
727 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
728 return cpu;
729 }
730
731 acpi_processor_set_pdc(handle);
732 acpi_map_cpu2node(handle, cpu, physid);
733
734 *pcpu = cpu;
735 return 0;
736 }
737 EXPORT_SYMBOL(acpi_map_cpu);
738
739 int acpi_unmap_cpu(int cpu)
740 {
741 #ifdef CONFIG_ACPI_NUMA
742 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
743 #endif
744
745 per_cpu(x86_cpu_to_apicid, cpu) = -1;
746 set_cpu_present(cpu, false);
747 num_processors--;
748
749 return (0);
750 }
751 EXPORT_SYMBOL(acpi_unmap_cpu);
752 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
753
754 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
755 {
756 int ret = -ENOSYS;
757 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
758 int ioapic_id;
759 u64 addr;
760 struct ioapic_domain_cfg cfg = {
761 .type = IOAPIC_DOMAIN_DYNAMIC,
762 .ops = &mp_ioapic_irqdomain_ops,
763 };
764
765 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
766 if (ioapic_id < 0) {
767 unsigned long long uid;
768 acpi_status status;
769
770 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
771 NULL, &uid);
772 if (ACPI_FAILURE(status)) {
773 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
774 return -EINVAL;
775 }
776 ioapic_id = (int)uid;
777 }
778
779 mutex_lock(&acpi_ioapic_lock);
780 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
781 mutex_unlock(&acpi_ioapic_lock);
782 #endif
783
784 return ret;
785 }
786 EXPORT_SYMBOL(acpi_register_ioapic);
787
788 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
789 {
790 int ret = -ENOSYS;
791
792 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
793 mutex_lock(&acpi_ioapic_lock);
794 ret = mp_unregister_ioapic(gsi_base);
795 mutex_unlock(&acpi_ioapic_lock);
796 #endif
797
798 return ret;
799 }
800 EXPORT_SYMBOL(acpi_unregister_ioapic);
801
802 /**
803 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
804 * has been registered
805 * @handle: ACPI handle of the IOAPIC deivce
806 * @gsi_base: GSI base associated with the IOAPIC
807 *
808 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
809 * with acpi_register_ioapic()/acpi_unregister_ioapic().
810 */
811 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
812 {
813 int ret = 0;
814
815 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
816 mutex_lock(&acpi_ioapic_lock);
817 ret = mp_ioapic_registered(gsi_base);
818 mutex_unlock(&acpi_ioapic_lock);
819 #endif
820
821 return ret;
822 }
823
824 static int __init acpi_parse_sbf(struct acpi_table_header *table)
825 {
826 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
827
828 sbf_port = sb->cmos_index; /* Save CMOS port */
829
830 return 0;
831 }
832
833 #ifdef CONFIG_HPET_TIMER
834 #include <asm/hpet.h>
835
836 static struct resource *hpet_res __initdata;
837
838 static int __init acpi_parse_hpet(struct acpi_table_header *table)
839 {
840 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
841
842 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
843 printk(KERN_WARNING PREFIX "HPET timers must be located in "
844 "memory.\n");
845 return -1;
846 }
847
848 hpet_address = hpet_tbl->address.address;
849 hpet_blockid = hpet_tbl->sequence;
850
851 /*
852 * Some broken BIOSes advertise HPET at 0x0. We really do not
853 * want to allocate a resource there.
854 */
855 if (!hpet_address) {
856 printk(KERN_WARNING PREFIX
857 "HPET id: %#x base: %#lx is invalid\n",
858 hpet_tbl->id, hpet_address);
859 return 0;
860 }
861 #ifdef CONFIG_X86_64
862 /*
863 * Some even more broken BIOSes advertise HPET at
864 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
865 * some noise:
866 */
867 if (hpet_address == 0xfed0000000000000UL) {
868 if (!hpet_force_user) {
869 printk(KERN_WARNING PREFIX "HPET id: %#x "
870 "base: 0xfed0000000000000 is bogus\n "
871 "try hpet=force on the kernel command line to "
872 "fix it up to 0xfed00000.\n", hpet_tbl->id);
873 hpet_address = 0;
874 return 0;
875 }
876 printk(KERN_WARNING PREFIX
877 "HPET id: %#x base: 0xfed0000000000000 fixed up "
878 "to 0xfed00000.\n", hpet_tbl->id);
879 hpet_address >>= 32;
880 }
881 #endif
882 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
883 hpet_tbl->id, hpet_address);
884
885 /*
886 * Allocate and initialize the HPET firmware resource for adding into
887 * the resource tree during the lateinit timeframe.
888 */
889 #define HPET_RESOURCE_NAME_SIZE 9
890 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
891
892 hpet_res->name = (void *)&hpet_res[1];
893 hpet_res->flags = IORESOURCE_MEM;
894 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
895 hpet_tbl->sequence);
896
897 hpet_res->start = hpet_address;
898 hpet_res->end = hpet_address + (1 * 1024) - 1;
899
900 return 0;
901 }
902
903 /*
904 * hpet_insert_resource inserts the HPET resources used into the resource
905 * tree.
906 */
907 static __init int hpet_insert_resource(void)
908 {
909 if (!hpet_res)
910 return 1;
911
912 return insert_resource(&iomem_resource, hpet_res);
913 }
914
915 late_initcall(hpet_insert_resource);
916
917 #else
918 #define acpi_parse_hpet NULL
919 #endif
920
921 static int __init acpi_parse_fadt(struct acpi_table_header *table)
922 {
923 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
924 pr_debug("ACPI: no legacy devices present\n");
925 x86_platform.legacy.devices.pnpbios = 0;
926 }
927
928 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
929 pr_debug("ACPI: not registering RTC platform device\n");
930 x86_platform.legacy.rtc = 0;
931 }
932
933 #ifdef CONFIG_X86_PM_TIMER
934 /* detect the location of the ACPI PM Timer */
935 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
936 /* FADT rev. 2 */
937 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
938 ACPI_ADR_SPACE_SYSTEM_IO)
939 return 0;
940
941 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
942 /*
943 * "X" fields are optional extensions to the original V1.0
944 * fields, so we must selectively expand V1.0 fields if the
945 * corresponding X field is zero.
946 */
947 if (!pmtmr_ioport)
948 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
949 } else {
950 /* FADT rev. 1 */
951 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
952 }
953 if (pmtmr_ioport)
954 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
955 pmtmr_ioport);
956 #endif
957 return 0;
958 }
959
960 #ifdef CONFIG_X86_LOCAL_APIC
961 /*
962 * Parse LAPIC entries in MADT
963 * returns 0 on success, < 0 on error
964 */
965
966 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
967 {
968 int count;
969
970 if (!boot_cpu_has(X86_FEATURE_APIC))
971 return -ENODEV;
972
973 /*
974 * Note that the LAPIC address is obtained from the MADT (32-bit value)
975 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
976 */
977
978 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
979 acpi_parse_lapic_addr_ovr, 0);
980 if (count < 0) {
981 printk(KERN_ERR PREFIX
982 "Error parsing LAPIC address override entry\n");
983 return count;
984 }
985
986 register_lapic_address(acpi_lapic_addr);
987
988 return count;
989 }
990
991 static int __init acpi_parse_madt_lapic_entries(void)
992 {
993 int count;
994 int x2count = 0;
995 int ret;
996 struct acpi_subtable_proc madt_proc[2];
997
998 if (!boot_cpu_has(X86_FEATURE_APIC))
999 return -ENODEV;
1000
1001 /*
1002 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1003 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1004 */
1005
1006 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1007 acpi_parse_lapic_addr_ovr, 0);
1008 if (count < 0) {
1009 printk(KERN_ERR PREFIX
1010 "Error parsing LAPIC address override entry\n");
1011 return count;
1012 }
1013
1014 register_lapic_address(acpi_lapic_addr);
1015
1016 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1017 acpi_parse_sapic, MAX_LOCAL_APIC);
1018
1019 if (!count) {
1020 memset(madt_proc, 0, sizeof(madt_proc));
1021 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1022 madt_proc[0].handler = acpi_parse_lapic;
1023 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1024 madt_proc[1].handler = acpi_parse_x2apic;
1025 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1026 sizeof(struct acpi_table_madt),
1027 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1028 if (ret < 0) {
1029 printk(KERN_ERR PREFIX
1030 "Error parsing LAPIC/X2APIC entries\n");
1031 return ret;
1032 }
1033
1034 x2count = madt_proc[0].count;
1035 count = madt_proc[1].count;
1036 }
1037 if (!count && !x2count) {
1038 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1039 /* TBD: Cleanup to allow fallback to MPS */
1040 return -ENODEV;
1041 } else if (count < 0 || x2count < 0) {
1042 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1043 /* TBD: Cleanup to allow fallback to MPS */
1044 return count;
1045 }
1046
1047 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1048 acpi_parse_x2apic_nmi, 0);
1049 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1050 acpi_parse_lapic_nmi, 0);
1051 if (count < 0 || x2count < 0) {
1052 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1053 /* TBD: Cleanup to allow fallback to MPS */
1054 return count;
1055 }
1056 return 0;
1057 }
1058 #endif /* CONFIG_X86_LOCAL_APIC */
1059
1060 #ifdef CONFIG_X86_IO_APIC
1061 static void __init mp_config_acpi_legacy_irqs(void)
1062 {
1063 int i;
1064 struct mpc_intsrc mp_irq;
1065
1066 #ifdef CONFIG_EISA
1067 /*
1068 * Fabricate the legacy ISA bus (bus #31).
1069 */
1070 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1071 #endif
1072 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1073 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1074
1075 /*
1076 * Use the default configuration for the IRQs 0-15. Unless
1077 * overridden by (MADT) interrupt source override entries.
1078 */
1079 for (i = 0; i < nr_legacy_irqs(); i++) {
1080 int ioapic, pin;
1081 unsigned int dstapic;
1082 int idx;
1083 u32 gsi;
1084
1085 /* Locate the gsi that irq i maps to. */
1086 if (acpi_isa_irq_to_gsi(i, &gsi))
1087 continue;
1088
1089 /*
1090 * Locate the IOAPIC that manages the ISA IRQ.
1091 */
1092 ioapic = mp_find_ioapic(gsi);
1093 if (ioapic < 0)
1094 continue;
1095 pin = mp_find_ioapic_pin(ioapic, gsi);
1096 dstapic = mpc_ioapic_id(ioapic);
1097
1098 for (idx = 0; idx < mp_irq_entries; idx++) {
1099 struct mpc_intsrc *irq = mp_irqs + idx;
1100
1101 /* Do we already have a mapping for this ISA IRQ? */
1102 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1103 break;
1104
1105 /* Do we already have a mapping for this IOAPIC pin */
1106 if (irq->dstapic == dstapic && irq->dstirq == pin)
1107 break;
1108 }
1109
1110 if (idx != mp_irq_entries) {
1111 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1112 continue; /* IRQ already used */
1113 }
1114
1115 mp_irq.type = MP_INTSRC;
1116 mp_irq.irqflag = 0; /* Conforming */
1117 mp_irq.srcbus = MP_ISA_BUS;
1118 mp_irq.dstapic = dstapic;
1119 mp_irq.irqtype = mp_INT;
1120 mp_irq.srcbusirq = i; /* Identity mapped */
1121 mp_irq.dstirq = pin;
1122
1123 mp_save_irq(&mp_irq);
1124 }
1125 }
1126
1127 /*
1128 * Parse IOAPIC related entries in MADT
1129 * returns 0 on success, < 0 on error
1130 */
1131 static int __init acpi_parse_madt_ioapic_entries(void)
1132 {
1133 int count;
1134
1135 /*
1136 * ACPI interpreter is required to complete interrupt setup,
1137 * so if it is off, don't enumerate the io-apics with ACPI.
1138 * If MPS is present, it will handle them,
1139 * otherwise the system will stay in PIC mode
1140 */
1141 if (acpi_disabled || acpi_noirq)
1142 return -ENODEV;
1143
1144 if (!boot_cpu_has(X86_FEATURE_APIC))
1145 return -ENODEV;
1146
1147 /*
1148 * if "noapic" boot option, don't look for IO-APICs
1149 */
1150 if (skip_ioapic_setup) {
1151 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1152 "due to 'noapic' option.\n");
1153 return -ENODEV;
1154 }
1155
1156 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1157 MAX_IO_APICS);
1158 if (!count) {
1159 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1160 return -ENODEV;
1161 } else if (count < 0) {
1162 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1163 return count;
1164 }
1165
1166 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1167 acpi_parse_int_src_ovr, nr_irqs);
1168 if (count < 0) {
1169 printk(KERN_ERR PREFIX
1170 "Error parsing interrupt source overrides entry\n");
1171 /* TBD: Cleanup to allow fallback to MPS */
1172 return count;
1173 }
1174
1175 /*
1176 * If BIOS did not supply an INT_SRC_OVR for the SCI
1177 * pretend we got one so we can set the SCI flags.
1178 */
1179 if (!acpi_sci_override_gsi)
1180 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1181 acpi_gbl_FADT.sci_interrupt);
1182
1183 /* Fill in identity legacy mappings where no override */
1184 mp_config_acpi_legacy_irqs();
1185
1186 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1187 acpi_parse_nmi_src, nr_irqs);
1188 if (count < 0) {
1189 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1190 /* TBD: Cleanup to allow fallback to MPS */
1191 return count;
1192 }
1193
1194 return 0;
1195 }
1196 #else
1197 static inline int acpi_parse_madt_ioapic_entries(void)
1198 {
1199 return -1;
1200 }
1201 #endif /* !CONFIG_X86_IO_APIC */
1202
1203 static void __init early_acpi_process_madt(void)
1204 {
1205 #ifdef CONFIG_X86_LOCAL_APIC
1206 int error;
1207
1208 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1209
1210 /*
1211 * Parse MADT LAPIC entries
1212 */
1213 error = early_acpi_parse_madt_lapic_addr_ovr();
1214 if (!error) {
1215 acpi_lapic = 1;
1216 smp_found_config = 1;
1217 }
1218 if (error == -EINVAL) {
1219 /*
1220 * Dell Precision Workstation 410, 610 come here.
1221 */
1222 printk(KERN_ERR PREFIX
1223 "Invalid BIOS MADT, disabling ACPI\n");
1224 disable_acpi();
1225 }
1226 }
1227 #endif
1228 }
1229
1230 static void __init acpi_process_madt(void)
1231 {
1232 #ifdef CONFIG_X86_LOCAL_APIC
1233 int error;
1234
1235 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1236
1237 /*
1238 * Parse MADT LAPIC entries
1239 */
1240 error = acpi_parse_madt_lapic_entries();
1241 if (!error) {
1242 acpi_lapic = 1;
1243
1244 /*
1245 * Parse MADT IO-APIC entries
1246 */
1247 mutex_lock(&acpi_ioapic_lock);
1248 error = acpi_parse_madt_ioapic_entries();
1249 mutex_unlock(&acpi_ioapic_lock);
1250 if (!error) {
1251 acpi_set_irq_model_ioapic();
1252
1253 smp_found_config = 1;
1254 }
1255 }
1256 if (error == -EINVAL) {
1257 /*
1258 * Dell Precision Workstation 410, 610 come here.
1259 */
1260 printk(KERN_ERR PREFIX
1261 "Invalid BIOS MADT, disabling ACPI\n");
1262 disable_acpi();
1263 }
1264 } else {
1265 /*
1266 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1267 * In the event an MPS table was found, forget it.
1268 * Boot with "acpi=off" to use MPS on such a system.
1269 */
1270 if (smp_found_config) {
1271 printk(KERN_WARNING PREFIX
1272 "No APIC-table, disabling MPS\n");
1273 smp_found_config = 0;
1274 }
1275 }
1276
1277 /*
1278 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1279 * processors, where MPS only supports physical.
1280 */
1281 if (acpi_lapic && acpi_ioapic)
1282 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1283 "information\n");
1284 else if (acpi_lapic)
1285 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1286 "configuration information\n");
1287 #endif
1288 return;
1289 }
1290
1291 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1292 {
1293 if (!acpi_force) {
1294 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1295 d->ident);
1296 acpi_noirq_set();
1297 }
1298 return 0;
1299 }
1300
1301 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1302 {
1303 if (!acpi_force) {
1304 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1305 d->ident);
1306 acpi_disable_pci();
1307 }
1308 return 0;
1309 }
1310
1311 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1312 {
1313 if (!acpi_force) {
1314 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1315 disable_acpi();
1316 } else {
1317 printk(KERN_NOTICE
1318 "Warning: DMI blacklist says broken, but acpi forced\n");
1319 }
1320 return 0;
1321 }
1322
1323 /*
1324 * Force ignoring BIOS IRQ0 override
1325 */
1326 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1327 {
1328 if (!acpi_skip_timer_override) {
1329 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1330 d->ident);
1331 acpi_skip_timer_override = 1;
1332 }
1333 return 0;
1334 }
1335
1336 /*
1337 * ACPI offers an alternative platform interface model that removes
1338 * ACPI hardware requirements for platforms that do not implement
1339 * the PC Architecture.
1340 *
1341 * We initialize the Hardware-reduced ACPI model here:
1342 */
1343 static void __init acpi_reduced_hw_init(void)
1344 {
1345 if (acpi_gbl_reduced_hardware) {
1346 /*
1347 * Override x86_init functions and bypass legacy pic
1348 * in Hardware-reduced ACPI mode
1349 */
1350 x86_init.timers.timer_init = x86_init_noop;
1351 x86_init.irqs.pre_vector_init = x86_init_noop;
1352 legacy_pic = &null_legacy_pic;
1353 }
1354 }
1355
1356 /*
1357 * If your system is blacklisted here, but you find that acpi=force
1358 * works for you, please contact linux-acpi@vger.kernel.org
1359 */
1360 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1361 /*
1362 * Boxes that need ACPI disabled
1363 */
1364 {
1365 .callback = dmi_disable_acpi,
1366 .ident = "IBM Thinkpad",
1367 .matches = {
1368 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1369 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1370 },
1371 },
1372
1373 /*
1374 * Boxes that need ACPI PCI IRQ routing disabled
1375 */
1376 {
1377 .callback = disable_acpi_irq,
1378 .ident = "ASUS A7V",
1379 .matches = {
1380 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1381 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1382 /* newer BIOS, Revision 1011, does work */
1383 DMI_MATCH(DMI_BIOS_VERSION,
1384 "ASUS A7V ACPI BIOS Revision 1007"),
1385 },
1386 },
1387 {
1388 /*
1389 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1390 * for LPC bridge, which is needed for the PCI
1391 * interrupt links to work. DSDT fix is in bug 5966.
1392 * 2645, 2646 model numbers are shared with 600/600E/600X
1393 */
1394 .callback = disable_acpi_irq,
1395 .ident = "IBM Thinkpad 600 Series 2645",
1396 .matches = {
1397 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1398 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1399 },
1400 },
1401 {
1402 .callback = disable_acpi_irq,
1403 .ident = "IBM Thinkpad 600 Series 2646",
1404 .matches = {
1405 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1406 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1407 },
1408 },
1409 /*
1410 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1411 */
1412 { /* _BBN 0 bug */
1413 .callback = disable_acpi_pci,
1414 .ident = "ASUS PR-DLS",
1415 .matches = {
1416 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1417 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1418 DMI_MATCH(DMI_BIOS_VERSION,
1419 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1420 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1421 },
1422 },
1423 {
1424 .callback = disable_acpi_pci,
1425 .ident = "Acer TravelMate 36x Laptop",
1426 .matches = {
1427 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1428 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1429 },
1430 },
1431 {}
1432 };
1433
1434 /* second table for DMI checks that should run after early-quirks */
1435 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1436 /*
1437 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1438 * which includes some code which overrides all temperature
1439 * trip points to 16C if the INTIN2 input of the I/O APIC
1440 * is enabled. This input is incorrectly designated the
1441 * ISA IRQ 0 via an interrupt source override even though
1442 * it is wired to the output of the master 8259A and INTIN0
1443 * is not connected at all. Force ignoring BIOS IRQ0
1444 * override in that cases.
1445 */
1446 {
1447 .callback = dmi_ignore_irq0_timer_override,
1448 .ident = "HP nx6115 laptop",
1449 .matches = {
1450 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1451 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1452 },
1453 },
1454 {
1455 .callback = dmi_ignore_irq0_timer_override,
1456 .ident = "HP NX6125 laptop",
1457 .matches = {
1458 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1459 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1460 },
1461 },
1462 {
1463 .callback = dmi_ignore_irq0_timer_override,
1464 .ident = "HP NX6325 laptop",
1465 .matches = {
1466 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1467 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1468 },
1469 },
1470 {
1471 .callback = dmi_ignore_irq0_timer_override,
1472 .ident = "HP 6715b laptop",
1473 .matches = {
1474 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1475 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1476 },
1477 },
1478 {
1479 .callback = dmi_ignore_irq0_timer_override,
1480 .ident = "FUJITSU SIEMENS",
1481 .matches = {
1482 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1483 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1484 },
1485 },
1486 {}
1487 };
1488
1489 /*
1490 * acpi_boot_table_init() and acpi_boot_init()
1491 * called from setup_arch(), always.
1492 * 1. checksums all tables
1493 * 2. enumerates lapics
1494 * 3. enumerates io-apics
1495 *
1496 * acpi_table_init() is separate to allow reading SRAT without
1497 * other side effects.
1498 *
1499 * side effects of acpi_boot_init:
1500 * acpi_lapic = 1 if LAPIC found
1501 * acpi_ioapic = 1 if IOAPIC found
1502 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1503 * if acpi_blacklisted() acpi_disabled = 1;
1504 * acpi_irq_model=...
1505 * ...
1506 */
1507
1508 void __init acpi_boot_table_init(void)
1509 {
1510 dmi_check_system(acpi_dmi_table);
1511
1512 /*
1513 * If acpi_disabled, bail out
1514 */
1515 if (acpi_disabled)
1516 return;
1517
1518 /*
1519 * Initialize the ACPI boot-time table parser.
1520 */
1521 if (acpi_table_init()) {
1522 disable_acpi();
1523 return;
1524 }
1525
1526 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1527
1528 /*
1529 * blacklist may disable ACPI entirely
1530 */
1531 if (acpi_blacklisted()) {
1532 if (acpi_force) {
1533 printk(KERN_WARNING PREFIX "acpi=force override\n");
1534 } else {
1535 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1536 disable_acpi();
1537 return;
1538 }
1539 }
1540 }
1541
1542 int __init early_acpi_boot_init(void)
1543 {
1544 /*
1545 * If acpi_disabled, bail out
1546 */
1547 if (acpi_disabled)
1548 return 1;
1549
1550 /*
1551 * Process the Multiple APIC Description Table (MADT), if present
1552 */
1553 early_acpi_process_madt();
1554
1555 /*
1556 * Hardware-reduced ACPI mode initialization:
1557 */
1558 acpi_reduced_hw_init();
1559
1560 return 0;
1561 }
1562
1563 int __init acpi_boot_init(void)
1564 {
1565 /* those are executed after early-quirks are executed */
1566 dmi_check_system(acpi_dmi_table_late);
1567
1568 /*
1569 * If acpi_disabled, bail out
1570 */
1571 if (acpi_disabled)
1572 return 1;
1573
1574 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1575
1576 /*
1577 * set sci_int and PM timer address
1578 */
1579 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1580
1581 /*
1582 * Process the Multiple APIC Description Table (MADT), if present
1583 */
1584 acpi_process_madt();
1585
1586 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1587
1588 if (!acpi_noirq)
1589 x86_init.pci.init = pci_acpi_init;
1590
1591 return 0;
1592 }
1593
1594 static int __init parse_acpi(char *arg)
1595 {
1596 if (!arg)
1597 return -EINVAL;
1598
1599 /* "acpi=off" disables both ACPI table parsing and interpreter */
1600 if (strcmp(arg, "off") == 0) {
1601 disable_acpi();
1602 }
1603 /* acpi=force to over-ride black-list */
1604 else if (strcmp(arg, "force") == 0) {
1605 acpi_force = 1;
1606 acpi_disabled = 0;
1607 }
1608 /* acpi=strict disables out-of-spec workarounds */
1609 else if (strcmp(arg, "strict") == 0) {
1610 acpi_strict = 1;
1611 }
1612 /* acpi=rsdt use RSDT instead of XSDT */
1613 else if (strcmp(arg, "rsdt") == 0) {
1614 acpi_gbl_do_not_use_xsdt = TRUE;
1615 }
1616 /* "acpi=noirq" disables ACPI interrupt routing */
1617 else if (strcmp(arg, "noirq") == 0) {
1618 acpi_noirq_set();
1619 }
1620 /* "acpi=copy_dsdt" copys DSDT */
1621 else if (strcmp(arg, "copy_dsdt") == 0) {
1622 acpi_gbl_copy_dsdt_locally = 1;
1623 }
1624 /* "acpi=nocmcff" disables FF mode for corrected errors */
1625 else if (strcmp(arg, "nocmcff") == 0) {
1626 acpi_disable_cmcff = 1;
1627 } else {
1628 /* Core will printk when we return error. */
1629 return -EINVAL;
1630 }
1631 return 0;
1632 }
1633 early_param("acpi", parse_acpi);
1634
1635 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1636 static int __init parse_pci(char *arg)
1637 {
1638 if (arg && strcmp(arg, "noacpi") == 0)
1639 acpi_disable_pci();
1640 return 0;
1641 }
1642 early_param("pci", parse_pci);
1643
1644 int __init acpi_mps_check(void)
1645 {
1646 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1647 /* mptable code is not built-in*/
1648 if (acpi_disabled || acpi_noirq) {
1649 printk(KERN_WARNING "MPS support code is not built-in.\n"
1650 "Using acpi=off or acpi=noirq or pci=noacpi "
1651 "may have problem\n");
1652 return 1;
1653 }
1654 #endif
1655 return 0;
1656 }
1657
1658 #ifdef CONFIG_X86_IO_APIC
1659 static int __init parse_acpi_skip_timer_override(char *arg)
1660 {
1661 acpi_skip_timer_override = 1;
1662 return 0;
1663 }
1664 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1665
1666 static int __init parse_acpi_use_timer_override(char *arg)
1667 {
1668 acpi_use_timer_override = 1;
1669 return 0;
1670 }
1671 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1672 #endif /* CONFIG_X86_IO_APIC */
1673
1674 static int __init setup_acpi_sci(char *s)
1675 {
1676 if (!s)
1677 return -EINVAL;
1678 if (!strcmp(s, "edge"))
1679 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1680 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1681 else if (!strcmp(s, "level"))
1682 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1683 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1684 else if (!strcmp(s, "high"))
1685 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1686 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1687 else if (!strcmp(s, "low"))
1688 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1689 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1690 else
1691 return -EINVAL;
1692 return 0;
1693 }
1694 early_param("acpi_sci", setup_acpi_sci);
1695
1696 int __acpi_acquire_global_lock(unsigned int *lock)
1697 {
1698 unsigned int old, new, val;
1699 do {
1700 old = *lock;
1701 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1702 val = cmpxchg(lock, old, new);
1703 } while (unlikely (val != old));
1704 return (new < 3) ? -1 : 0;
1705 }
1706
1707 int __acpi_release_global_lock(unsigned int *lock)
1708 {
1709 unsigned int old, new, val;
1710 do {
1711 old = *lock;
1712 new = old & ~0x3;
1713 val = cmpxchg(lock, old, new);
1714 } while (unlikely (val != old));
1715 return old & 0x1;
1716 }
1717
1718 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1719 {
1720 e820_add_region(addr, size, E820_ACPI);
1721 update_e820();
1722 }
Linux kernel - Deliverables
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