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