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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / arch / x86 / kernel / acpi / boot.c
blob2aa92094b59d4fb6f3fffa8c0a920eb8023f6d45
1 /*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/export.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38 #include <linux/efi-bgrt.h>
39 #include <linux/serial_core.h>
40
41 #include <asm/e820/api.h>
42 #include <asm/irqdomain.h>
43 #include <asm/pci_x86.h>
44 #include <asm/pgtable.h>
45 #include <asm/io_apic.h>
46 #include <asm/apic.h>
47 #include <asm/io.h>
48 #include <asm/mpspec.h>
49 #include <asm/smp.h>
50 #include <asm/i8259.h>
51
52 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
53 static int __initdata acpi_force = 0;
54 int acpi_disabled;
55 EXPORT_SYMBOL(acpi_disabled);
56
57 #ifdef CONFIG_X86_64
58 # include <asm/proto.h>
59 #endif /* X86 */
60
61 #define PREFIX "ACPI: "
62
63 int acpi_noirq; /* skip ACPI IRQ initialization */
64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
65 EXPORT_SYMBOL(acpi_pci_disabled);
66
67 int acpi_lapic;
68 int acpi_ioapic;
69 int acpi_strict;
70 int acpi_disable_cmcff;
71
72 /* ACPI SCI override configuration */
73 u8 acpi_sci_flags __initdata;
74 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
75 int acpi_skip_timer_override __initdata;
76 int acpi_use_timer_override __initdata;
77 int acpi_fix_pin2_polarity __initdata;
78
79 #ifdef CONFIG_X86_LOCAL_APIC
80 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
81 #endif
82
83 #ifdef CONFIG_X86_IO_APIC
84 /*
85 * Locks related to IOAPIC hotplug
86 * Hotplug side:
87 * ->device_hotplug_lock
88 * ->acpi_ioapic_lock
89 * ->ioapic_lock
90 * Interrupt mapping side:
91 * ->acpi_ioapic_lock
92 * ->ioapic_mutex
93 * ->ioapic_lock
94 */
95 static DEFINE_MUTEX(acpi_ioapic_lock);
96 #endif
97
98 /* --------------------------------------------------------------------------
99 Boot-time Configuration
100 -------------------------------------------------------------------------- */
101
102 /*
103 * The default interrupt routing model is PIC (8259). This gets
104 * overridden if IOAPICs are enumerated (below).
105 */
106 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
107
108
109 /*
110 * ISA irqs by default are the first 16 gsis but can be
111 * any gsi as specified by an interrupt source override.
112 */
113 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
114 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
115 };
116
117 /*
118 * This is just a simple wrapper around early_memremap(),
119 * with sanity checks for phys == 0 and size == 0.
120 */
121 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
122 {
123
124 if (!phys || !size)
125 return NULL;
126
127 return early_memremap(phys, size);
128 }
129
130 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
131 {
132 if (!map || !size)
133 return;
134
135 early_memunmap(map, size);
136 }
137
138 #ifdef CONFIG_X86_LOCAL_APIC
139 static int __init acpi_parse_madt(struct acpi_table_header *table)
140 {
141 struct acpi_table_madt *madt = NULL;
142
143 if (!boot_cpu_has(X86_FEATURE_APIC))
144 return -EINVAL;
145
146 madt = (struct acpi_table_madt *)table;
147 if (!madt) {
148 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
149 return -ENODEV;
150 }
151
152 if (madt->address) {
153 acpi_lapic_addr = (u64) madt->address;
154
155 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
156 madt->address);
157 }
158
159 default_acpi_madt_oem_check(madt->header.oem_id,
160 madt->header.oem_table_id);
161
162 return 0;
163 }
164
165 /**
166 * acpi_register_lapic - register a local apic and generates a logic cpu number
167 * @id: local apic id to register
168 * @acpiid: ACPI id to register
169 * @enabled: this cpu is enabled or not
170 *
171 * Returns the logic cpu number which maps to the local apic
172 */
173 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
174 {
175 unsigned int ver = 0;
176 int cpu;
177
178 if (id >= MAX_LOCAL_APIC) {
179 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
180 return -EINVAL;
181 }
182
183 if (!enabled) {
184 ++disabled_cpus;
185 return -EINVAL;
186 }
187
188 if (boot_cpu_physical_apicid != -1U)
189 ver = boot_cpu_apic_version;
190
191 cpu = generic_processor_info(id, ver);
192 if (cpu >= 0)
193 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
194
195 return cpu;
196 }
197
198 static int __init
199 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
200 {
201 struct acpi_madt_local_x2apic *processor = NULL;
202 #ifdef CONFIG_X86_X2APIC
203 int apic_id;
204 u8 enabled;
205 #endif
206
207 processor = (struct acpi_madt_local_x2apic *)header;
208
209 if (BAD_MADT_ENTRY(processor, end))
210 return -EINVAL;
211
212 acpi_table_print_madt_entry(header);
213
214 #ifdef CONFIG_X86_X2APIC
215 apic_id = processor->local_apic_id;
216 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
217
218 /*
219 * We need to register disabled CPU as well to permit
220 * counting disabled CPUs. This allows us to size
221 * cpus_possible_map more accurately, to permit
222 * to not preallocating memory for all NR_CPUS
223 * when we use CPU hotplug.
224 */
225 if (!apic->apic_id_valid(apic_id) && enabled)
226 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
227 else
228 acpi_register_lapic(apic_id, processor->uid, enabled);
229 #else
230 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
231 #endif
232
233 return 0;
234 }
235
236 static int __init
237 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
238 {
239 struct acpi_madt_local_apic *processor = NULL;
240
241 processor = (struct acpi_madt_local_apic *)header;
242
243 if (BAD_MADT_ENTRY(processor, end))
244 return -EINVAL;
245
246 acpi_table_print_madt_entry(header);
247
248 /* Ignore invalid ID */
249 if (processor->id == 0xff)
250 return 0;
251
252 /*
253 * We need to register disabled CPU as well to permit
254 * counting disabled CPUs. This allows us to size
255 * cpus_possible_map more accurately, to permit
256 * to not preallocating memory for all NR_CPUS
257 * when we use CPU hotplug.
258 */
259 acpi_register_lapic(processor->id, /* APIC ID */
260 processor->processor_id, /* ACPI ID */
261 processor->lapic_flags & ACPI_MADT_ENABLED);
262
263 return 0;
264 }
265
266 static int __init
267 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
268 {
269 struct acpi_madt_local_sapic *processor = NULL;
270
271 processor = (struct acpi_madt_local_sapic *)header;
272
273 if (BAD_MADT_ENTRY(processor, end))
274 return -EINVAL;
275
276 acpi_table_print_madt_entry(header);
277
278 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
279 processor->processor_id, /* ACPI ID */
280 processor->lapic_flags & ACPI_MADT_ENABLED);
281
282 return 0;
283 }
284
285 static int __init
286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
287 const unsigned long end)
288 {
289 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
290
291 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
292
293 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
294 return -EINVAL;
295
296 acpi_table_print_madt_entry(header);
297
298 acpi_lapic_addr = lapic_addr_ovr->address;
299
300 return 0;
301 }
302
303 static int __init
304 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
305 const unsigned long end)
306 {
307 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
308
309 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
310
311 if (BAD_MADT_ENTRY(x2apic_nmi, end))
312 return -EINVAL;
313
314 acpi_table_print_madt_entry(header);
315
316 if (x2apic_nmi->lint != 1)
317 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
318
319 return 0;
320 }
321
322 static int __init
323 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
324 {
325 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
326
327 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
328
329 if (BAD_MADT_ENTRY(lapic_nmi, end))
330 return -EINVAL;
331
332 acpi_table_print_madt_entry(header);
333
334 if (lapic_nmi->lint != 1)
335 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
336
337 return 0;
338 }
339
340 #endif /*CONFIG_X86_LOCAL_APIC */
341
342 #ifdef CONFIG_X86_IO_APIC
343 #define MP_ISA_BUS 0
344
345 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
346 u8 trigger, u32 gsi);
347
348 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
349 u32 gsi)
350 {
351 /*
352 * Check bus_irq boundary.
353 */
354 if (bus_irq >= NR_IRQS_LEGACY) {
355 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
356 return;
357 }
358
359 /*
360 * TBD: This check is for faulty timer entries, where the override
361 * erroneously sets the trigger to level, resulting in a HUGE
362 * increase of timer interrupts!
363 */
364 if ((bus_irq == 0) && (trigger == 3))
365 trigger = 1;
366
367 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
368 return;
369 /*
370 * Reset default identity mapping if gsi is also an legacy IRQ,
371 * otherwise there will be more than one entry with the same GSI
372 * and acpi_isa_irq_to_gsi() may give wrong result.
373 */
374 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
375 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
376 isa_irq_to_gsi[bus_irq] = gsi;
377 }
378
379 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
380 int polarity)
381 {
382 #ifdef CONFIG_X86_MPPARSE
383 struct mpc_intsrc mp_irq;
384 struct pci_dev *pdev;
385 unsigned char number;
386 unsigned int devfn;
387 int ioapic;
388 u8 pin;
389
390 if (!acpi_ioapic)
391 return 0;
392 if (!dev || !dev_is_pci(dev))
393 return 0;
394
395 pdev = to_pci_dev(dev);
396 number = pdev->bus->number;
397 devfn = pdev->devfn;
398 pin = pdev->pin;
399 /* print the entry should happen on mptable identically */
400 mp_irq.type = MP_INTSRC;
401 mp_irq.irqtype = mp_INT;
402 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
403 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
404 mp_irq.srcbus = number;
405 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
406 ioapic = mp_find_ioapic(gsi);
407 mp_irq.dstapic = mpc_ioapic_id(ioapic);
408 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
409
410 mp_save_irq(&mp_irq);
411 #endif
412 return 0;
413 }
414
415 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
416 u8 trigger, u32 gsi)
417 {
418 struct mpc_intsrc mp_irq;
419 int ioapic, pin;
420
421 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
422 ioapic = mp_find_ioapic(gsi);
423 if (ioapic < 0) {
424 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
425 return ioapic;
426 }
427
428 pin = mp_find_ioapic_pin(ioapic, gsi);
429
430 mp_irq.type = MP_INTSRC;
431 mp_irq.irqtype = mp_INT;
432 mp_irq.irqflag = (trigger << 2) | polarity;
433 mp_irq.srcbus = MP_ISA_BUS;
434 mp_irq.srcbusirq = bus_irq;
435 mp_irq.dstapic = mpc_ioapic_id(ioapic);
436 mp_irq.dstirq = pin;
437
438 mp_save_irq(&mp_irq);
439
440 return 0;
441 }
442
443 static int __init
444 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
445 {
446 struct acpi_madt_io_apic *ioapic = NULL;
447 struct ioapic_domain_cfg cfg = {
448 .type = IOAPIC_DOMAIN_DYNAMIC,
449 .ops = &mp_ioapic_irqdomain_ops,
450 };
451
452 ioapic = (struct acpi_madt_io_apic *)header;
453
454 if (BAD_MADT_ENTRY(ioapic, end))
455 return -EINVAL;
456
457 acpi_table_print_madt_entry(header);
458
459 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
460 if (ioapic->global_irq_base < nr_legacy_irqs())
461 cfg.type = IOAPIC_DOMAIN_LEGACY;
462
463 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
464 &cfg);
465
466 return 0;
467 }
468
469 /*
470 * Parse Interrupt Source Override for the ACPI SCI
471 */
472 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
473 {
474 if (trigger == 0) /* compatible SCI trigger is level */
475 trigger = 3;
476
477 if (polarity == 0) /* compatible SCI polarity is low */
478 polarity = 3;
479
480 /* Command-line over-ride via acpi_sci= */
481 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
482 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
483
484 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
485 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
486
487 if (bus_irq < NR_IRQS_LEGACY)
488 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
489 else
490 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
491
492 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
493
494 /*
495 * stash over-ride to indicate we've been here
496 * and for later update of acpi_gbl_FADT
497 */
498 acpi_sci_override_gsi = gsi;
499 return;
500 }
501
502 static int __init
503 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
504 const unsigned long end)
505 {
506 struct acpi_madt_interrupt_override *intsrc = NULL;
507
508 intsrc = (struct acpi_madt_interrupt_override *)header;
509
510 if (BAD_MADT_ENTRY(intsrc, end))
511 return -EINVAL;
512
513 acpi_table_print_madt_entry(header);
514
515 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
516 acpi_sci_ioapic_setup(intsrc->source_irq,
517 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
518 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
519 intsrc->global_irq);
520 return 0;
521 }
522
523 if (intsrc->source_irq == 0) {
524 if (acpi_skip_timer_override) {
525 printk(PREFIX "BIOS IRQ0 override ignored.\n");
526 return 0;
527 }
528
529 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
530 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
531 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
532 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
533 }
534 }
535
536 mp_override_legacy_irq(intsrc->source_irq,
537 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
538 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
539 intsrc->global_irq);
540
541 return 0;
542 }
543
544 static int __init
545 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
546 {
547 struct acpi_madt_nmi_source *nmi_src = NULL;
548
549 nmi_src = (struct acpi_madt_nmi_source *)header;
550
551 if (BAD_MADT_ENTRY(nmi_src, end))
552 return -EINVAL;
553
554 acpi_table_print_madt_entry(header);
555
556 /* TBD: Support nimsrc entries? */
557
558 return 0;
559 }
560
561 #endif /* CONFIG_X86_IO_APIC */
562
563 /*
564 * acpi_pic_sci_set_trigger()
565 *
566 * use ELCR to set PIC-mode trigger type for SCI
567 *
568 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
569 * it may require Edge Trigger -- use "acpi_sci=edge"
570 *
571 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
572 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
573 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
574 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
575 */
576
577 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
578 {
579 unsigned int mask = 1 << irq;
580 unsigned int old, new;
581
582 /* Real old ELCR mask */
583 old = inb(0x4d0) | (inb(0x4d1) << 8);
584
585 /*
586 * If we use ACPI to set PCI IRQs, then we should clear ELCR
587 * since we will set it correctly as we enable the PCI irq
588 * routing.
589 */
590 new = acpi_noirq ? old : 0;
591
592 /*
593 * Update SCI information in the ELCR, it isn't in the PCI
594 * routing tables..
595 */
596 switch (trigger) {
597 case 1: /* Edge - clear */
598 new &= ~mask;
599 break;
600 case 3: /* Level - set */
601 new |= mask;
602 break;
603 }
604
605 if (old == new)
606 return;
607
608 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
609 outb(new, 0x4d0);
610 outb(new >> 8, 0x4d1);
611 }
612
613 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
614 {
615 int rc, irq, trigger, polarity;
616
617 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
618 *irqp = gsi;
619 return 0;
620 }
621
622 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
623 if (rc)
624 return rc;
625
626 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
627 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
628 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
629 if (irq < 0)
630 return irq;
631
632 *irqp = irq;
633 return 0;
634 }
635 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
636
637 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
638 {
639 if (isa_irq < nr_legacy_irqs() &&
640 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
641 *gsi = isa_irq_to_gsi[isa_irq];
642 return 0;
643 }
644
645 return -1;
646 }
647
648 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
649 int trigger, int polarity)
650 {
651 #ifdef CONFIG_PCI
652 /*
653 * Make sure all (legacy) PCI IRQs are set as level-triggered.
654 */
655 if (trigger == ACPI_LEVEL_SENSITIVE)
656 elcr_set_level_irq(gsi);
657 #endif
658
659 return gsi;
660 }
661
662 #ifdef CONFIG_X86_LOCAL_APIC
663 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
664 int trigger, int polarity)
665 {
666 int irq = gsi;
667 #ifdef CONFIG_X86_IO_APIC
668 int node;
669 struct irq_alloc_info info;
670
671 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
672 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
673 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
674 ioapic_set_alloc_attr(&info, node, trigger, polarity);
675
676 mutex_lock(&acpi_ioapic_lock);
677 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
678 /* Don't set up the ACPI SCI because it's already set up */
679 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
680 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
681 mutex_unlock(&acpi_ioapic_lock);
682 #endif
683
684 return irq;
685 }
686
687 static void acpi_unregister_gsi_ioapic(u32 gsi)
688 {
689 #ifdef CONFIG_X86_IO_APIC
690 int irq;
691
692 mutex_lock(&acpi_ioapic_lock);
693 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
694 if (irq > 0)
695 mp_unmap_irq(irq);
696 mutex_unlock(&acpi_ioapic_lock);
697 #endif
698 }
699 #endif
700
701 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
702 int trigger, int polarity) = acpi_register_gsi_pic;
703 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
704
705 #ifdef CONFIG_ACPI_SLEEP
706 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
707 #else
708 int (*acpi_suspend_lowlevel)(void);
709 #endif
710
711 /*
712 * success: return IRQ number (>=0)
713 * failure: return < 0
714 */
715 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
716 {
717 return __acpi_register_gsi(dev, gsi, trigger, polarity);
718 }
719 EXPORT_SYMBOL_GPL(acpi_register_gsi);
720
721 void acpi_unregister_gsi(u32 gsi)
722 {
723 if (__acpi_unregister_gsi)
724 __acpi_unregister_gsi(gsi);
725 }
726 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
727
728 #ifdef CONFIG_X86_LOCAL_APIC
729 static void __init acpi_set_irq_model_ioapic(void)
730 {
731 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
732 __acpi_register_gsi = acpi_register_gsi_ioapic;
733 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
734 acpi_ioapic = 1;
735 }
736 #endif
737
738 /*
739 * ACPI based hotplug support for CPU
740 */
741 #ifdef CONFIG_ACPI_HOTPLUG_CPU
742 #include <acpi/processor.h>
743
744 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
745 {
746 #ifdef CONFIG_ACPI_NUMA
747 int nid;
748
749 nid = acpi_get_node(handle);
750 if (nid != NUMA_NO_NODE) {
751 set_apicid_to_node(physid, nid);
752 numa_set_node(cpu, nid);
753 }
754 #endif
755 return 0;
756 }
757
758 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
759 int *pcpu)
760 {
761 int cpu;
762
763 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
764 if (cpu < 0) {
765 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
766 return cpu;
767 }
768
769 acpi_processor_set_pdc(handle);
770 acpi_map_cpu2node(handle, cpu, physid);
771
772 *pcpu = cpu;
773 return 0;
774 }
775 EXPORT_SYMBOL(acpi_map_cpu);
776
777 int acpi_unmap_cpu(int cpu)
778 {
779 #ifdef CONFIG_ACPI_NUMA
780 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
781 #endif
782
783 per_cpu(x86_cpu_to_apicid, cpu) = -1;
784 set_cpu_present(cpu, false);
785 num_processors--;
786
787 return (0);
788 }
789 EXPORT_SYMBOL(acpi_unmap_cpu);
790 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
791
792 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
793 {
794 int ret = -ENOSYS;
795 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
796 int ioapic_id;
797 u64 addr;
798 struct ioapic_domain_cfg cfg = {
799 .type = IOAPIC_DOMAIN_DYNAMIC,
800 .ops = &mp_ioapic_irqdomain_ops,
801 };
802
803 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
804 if (ioapic_id < 0) {
805 unsigned long long uid;
806 acpi_status status;
807
808 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
809 NULL, &uid);
810 if (ACPI_FAILURE(status)) {
811 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
812 return -EINVAL;
813 }
814 ioapic_id = (int)uid;
815 }
816
817 mutex_lock(&acpi_ioapic_lock);
818 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
819 mutex_unlock(&acpi_ioapic_lock);
820 #endif
821
822 return ret;
823 }
824 EXPORT_SYMBOL(acpi_register_ioapic);
825
826 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
827 {
828 int ret = -ENOSYS;
829
830 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
831 mutex_lock(&acpi_ioapic_lock);
832 ret = mp_unregister_ioapic(gsi_base);
833 mutex_unlock(&acpi_ioapic_lock);
834 #endif
835
836 return ret;
837 }
838 EXPORT_SYMBOL(acpi_unregister_ioapic);
839
840 /**
841 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
842 * has been registered
843 * @handle: ACPI handle of the IOAPIC deivce
844 * @gsi_base: GSI base associated with the IOAPIC
845 *
846 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
847 * with acpi_register_ioapic()/acpi_unregister_ioapic().
848 */
849 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
850 {
851 int ret = 0;
852
853 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
854 mutex_lock(&acpi_ioapic_lock);
855 ret = mp_ioapic_registered(gsi_base);
856 mutex_unlock(&acpi_ioapic_lock);
857 #endif
858
859 return ret;
860 }
861
862 static int __init acpi_parse_sbf(struct acpi_table_header *table)
863 {
864 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
865
866 sbf_port = sb->cmos_index; /* Save CMOS port */
867
868 return 0;
869 }
870
871 #ifdef CONFIG_HPET_TIMER
872 #include <asm/hpet.h>
873
874 static struct resource *hpet_res __initdata;
875
876 static int __init acpi_parse_hpet(struct acpi_table_header *table)
877 {
878 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
879
880 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
881 printk(KERN_WARNING PREFIX "HPET timers must be located in "
882 "memory.\n");
883 return -1;
884 }
885
886 hpet_address = hpet_tbl->address.address;
887 hpet_blockid = hpet_tbl->sequence;
888
889 /*
890 * Some broken BIOSes advertise HPET at 0x0. We really do not
891 * want to allocate a resource there.
892 */
893 if (!hpet_address) {
894 printk(KERN_WARNING PREFIX
895 "HPET id: %#x base: %#lx is invalid\n",
896 hpet_tbl->id, hpet_address);
897 return 0;
898 }
899 #ifdef CONFIG_X86_64
900 /*
901 * Some even more broken BIOSes advertise HPET at
902 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
903 * some noise:
904 */
905 if (hpet_address == 0xfed0000000000000UL) {
906 if (!hpet_force_user) {
907 printk(KERN_WARNING PREFIX "HPET id: %#x "
908 "base: 0xfed0000000000000 is bogus\n "
909 "try hpet=force on the kernel command line to "
910 "fix it up to 0xfed00000.\n", hpet_tbl->id);
911 hpet_address = 0;
912 return 0;
913 }
914 printk(KERN_WARNING PREFIX
915 "HPET id: %#x base: 0xfed0000000000000 fixed up "
916 "to 0xfed00000.\n", hpet_tbl->id);
917 hpet_address >>= 32;
918 }
919 #endif
920 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
921 hpet_tbl->id, hpet_address);
922
923 /*
924 * Allocate and initialize the HPET firmware resource for adding into
925 * the resource tree during the lateinit timeframe.
926 */
927 #define HPET_RESOURCE_NAME_SIZE 9
928 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
929
930 hpet_res->name = (void *)&hpet_res[1];
931 hpet_res->flags = IORESOURCE_MEM;
932 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
933 hpet_tbl->sequence);
934
935 hpet_res->start = hpet_address;
936 hpet_res->end = hpet_address + (1 * 1024) - 1;
937
938 return 0;
939 }
940
941 /*
942 * hpet_insert_resource inserts the HPET resources used into the resource
943 * tree.
944 */
945 static __init int hpet_insert_resource(void)
946 {
947 if (!hpet_res)
948 return 1;
949
950 return insert_resource(&iomem_resource, hpet_res);
951 }
952
953 late_initcall(hpet_insert_resource);
954
955 #else
956 #define acpi_parse_hpet NULL
957 #endif
958
959 static int __init acpi_parse_fadt(struct acpi_table_header *table)
960 {
961 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
962 pr_debug("ACPI: no legacy devices present\n");
963 x86_platform.legacy.devices.pnpbios = 0;
964 }
965
966 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
967 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
968 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
969 pr_debug("ACPI: i8042 controller is absent\n");
970 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
971 }
972
973 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
974 pr_debug("ACPI: not registering RTC platform device\n");
975 x86_platform.legacy.rtc = 0;
976 }
977
978 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
979 pr_debug("ACPI: probing for VGA not safe\n");
980 x86_platform.legacy.no_vga = 1;
981 }
982
983 #ifdef CONFIG_X86_PM_TIMER
984 /* detect the location of the ACPI PM Timer */
985 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
986 /* FADT rev. 2 */
987 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
988 ACPI_ADR_SPACE_SYSTEM_IO)
989 return 0;
990
991 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
992 /*
993 * "X" fields are optional extensions to the original V1.0
994 * fields, so we must selectively expand V1.0 fields if the
995 * corresponding X field is zero.
996 */
997 if (!pmtmr_ioport)
998 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
999 } else {
1000 /* FADT rev. 1 */
1001 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1002 }
1003 if (pmtmr_ioport)
1004 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1005 pmtmr_ioport);
1006 #endif
1007 return 0;
1008 }
1009
1010 #ifdef CONFIG_X86_LOCAL_APIC
1011 /*
1012 * Parse LAPIC entries in MADT
1013 * returns 0 on success, < 0 on error
1014 */
1015
1016 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1017 {
1018 int count;
1019
1020 if (!boot_cpu_has(X86_FEATURE_APIC))
1021 return -ENODEV;
1022
1023 /*
1024 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1025 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1026 */
1027
1028 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1029 acpi_parse_lapic_addr_ovr, 0);
1030 if (count < 0) {
1031 printk(KERN_ERR PREFIX
1032 "Error parsing LAPIC address override entry\n");
1033 return count;
1034 }
1035
1036 register_lapic_address(acpi_lapic_addr);
1037
1038 return count;
1039 }
1040
1041 static int __init acpi_parse_madt_lapic_entries(void)
1042 {
1043 int count;
1044 int x2count = 0;
1045 int ret;
1046 struct acpi_subtable_proc madt_proc[2];
1047
1048 if (!boot_cpu_has(X86_FEATURE_APIC))
1049 return -ENODEV;
1050
1051 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1052 acpi_parse_sapic, MAX_LOCAL_APIC);
1053
1054 if (!count) {
1055 memset(madt_proc, 0, sizeof(madt_proc));
1056 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1057 madt_proc[0].handler = acpi_parse_lapic;
1058 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1059 madt_proc[1].handler = acpi_parse_x2apic;
1060 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1061 sizeof(struct acpi_table_madt),
1062 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1063 if (ret < 0) {
1064 printk(KERN_ERR PREFIX
1065 "Error parsing LAPIC/X2APIC entries\n");
1066 return ret;
1067 }
1068
1069 count = madt_proc[0].count;
1070 x2count = madt_proc[1].count;
1071 }
1072 if (!count && !x2count) {
1073 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1074 /* TBD: Cleanup to allow fallback to MPS */
1075 return -ENODEV;
1076 } else if (count < 0 || x2count < 0) {
1077 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1078 /* TBD: Cleanup to allow fallback to MPS */
1079 return count;
1080 }
1081
1082 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1083 acpi_parse_x2apic_nmi, 0);
1084 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1085 acpi_parse_lapic_nmi, 0);
1086 if (count < 0 || x2count < 0) {
1087 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1088 /* TBD: Cleanup to allow fallback to MPS */
1089 return count;
1090 }
1091 return 0;
1092 }
1093 #endif /* CONFIG_X86_LOCAL_APIC */
1094
1095 #ifdef CONFIG_X86_IO_APIC
1096 static void __init mp_config_acpi_legacy_irqs(void)
1097 {
1098 int i;
1099 struct mpc_intsrc mp_irq;
1100
1101 #ifdef CONFIG_EISA
1102 /*
1103 * Fabricate the legacy ISA bus (bus #31).
1104 */
1105 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1106 #endif
1107 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1108 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1109
1110 /*
1111 * Use the default configuration for the IRQs 0-15. Unless
1112 * overridden by (MADT) interrupt source override entries.
1113 */
1114 for (i = 0; i < nr_legacy_irqs(); i++) {
1115 int ioapic, pin;
1116 unsigned int dstapic;
1117 int idx;
1118 u32 gsi;
1119
1120 /* Locate the gsi that irq i maps to. */
1121 if (acpi_isa_irq_to_gsi(i, &gsi))
1122 continue;
1123
1124 /*
1125 * Locate the IOAPIC that manages the ISA IRQ.
1126 */
1127 ioapic = mp_find_ioapic(gsi);
1128 if (ioapic < 0)
1129 continue;
1130 pin = mp_find_ioapic_pin(ioapic, gsi);
1131 dstapic = mpc_ioapic_id(ioapic);
1132
1133 for (idx = 0; idx < mp_irq_entries; idx++) {
1134 struct mpc_intsrc *irq = mp_irqs + idx;
1135
1136 /* Do we already have a mapping for this ISA IRQ? */
1137 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1138 break;
1139
1140 /* Do we already have a mapping for this IOAPIC pin */
1141 if (irq->dstapic == dstapic && irq->dstirq == pin)
1142 break;
1143 }
1144
1145 if (idx != mp_irq_entries) {
1146 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1147 continue; /* IRQ already used */
1148 }
1149
1150 mp_irq.type = MP_INTSRC;
1151 mp_irq.irqflag = 0; /* Conforming */
1152 mp_irq.srcbus = MP_ISA_BUS;
1153 mp_irq.dstapic = dstapic;
1154 mp_irq.irqtype = mp_INT;
1155 mp_irq.srcbusirq = i; /* Identity mapped */
1156 mp_irq.dstirq = pin;
1157
1158 mp_save_irq(&mp_irq);
1159 }
1160 }
1161
1162 /*
1163 * Parse IOAPIC related entries in MADT
1164 * returns 0 on success, < 0 on error
1165 */
1166 static int __init acpi_parse_madt_ioapic_entries(void)
1167 {
1168 int count;
1169
1170 /*
1171 * ACPI interpreter is required to complete interrupt setup,
1172 * so if it is off, don't enumerate the io-apics with ACPI.
1173 * If MPS is present, it will handle them,
1174 * otherwise the system will stay in PIC mode
1175 */
1176 if (acpi_disabled || acpi_noirq)
1177 return -ENODEV;
1178
1179 if (!boot_cpu_has(X86_FEATURE_APIC))
1180 return -ENODEV;
1181
1182 /*
1183 * if "noapic" boot option, don't look for IO-APICs
1184 */
1185 if (skip_ioapic_setup) {
1186 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1187 "due to 'noapic' option.\n");
1188 return -ENODEV;
1189 }
1190
1191 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1192 MAX_IO_APICS);
1193 if (!count) {
1194 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1195 return -ENODEV;
1196 } else if (count < 0) {
1197 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1198 return count;
1199 }
1200
1201 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1202 acpi_parse_int_src_ovr, nr_irqs);
1203 if (count < 0) {
1204 printk(KERN_ERR PREFIX
1205 "Error parsing interrupt source overrides entry\n");
1206 /* TBD: Cleanup to allow fallback to MPS */
1207 return count;
1208 }
1209
1210 /*
1211 * If BIOS did not supply an INT_SRC_OVR for the SCI
1212 * pretend we got one so we can set the SCI flags.
1213 * But ignore setting up SCI on hardware reduced platforms.
1214 */
1215 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1216 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1217 acpi_gbl_FADT.sci_interrupt);
1218
1219 /* Fill in identity legacy mappings where no override */
1220 mp_config_acpi_legacy_irqs();
1221
1222 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1223 acpi_parse_nmi_src, nr_irqs);
1224 if (count < 0) {
1225 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1226 /* TBD: Cleanup to allow fallback to MPS */
1227 return count;
1228 }
1229
1230 return 0;
1231 }
1232 #else
1233 static inline int acpi_parse_madt_ioapic_entries(void)
1234 {
1235 return -1;
1236 }
1237 #endif /* !CONFIG_X86_IO_APIC */
1238
1239 static void __init early_acpi_process_madt(void)
1240 {
1241 #ifdef CONFIG_X86_LOCAL_APIC
1242 int error;
1243
1244 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1245
1246 /*
1247 * Parse MADT LAPIC entries
1248 */
1249 error = early_acpi_parse_madt_lapic_addr_ovr();
1250 if (!error) {
1251 acpi_lapic = 1;
1252 smp_found_config = 1;
1253 }
1254 if (error == -EINVAL) {
1255 /*
1256 * Dell Precision Workstation 410, 610 come here.
1257 */
1258 printk(KERN_ERR PREFIX
1259 "Invalid BIOS MADT, disabling ACPI\n");
1260 disable_acpi();
1261 }
1262 }
1263 #endif
1264 }
1265
1266 static void __init acpi_process_madt(void)
1267 {
1268 #ifdef CONFIG_X86_LOCAL_APIC
1269 int error;
1270
1271 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1272
1273 /*
1274 * Parse MADT LAPIC entries
1275 */
1276 error = acpi_parse_madt_lapic_entries();
1277 if (!error) {
1278 acpi_lapic = 1;
1279
1280 /*
1281 * Parse MADT IO-APIC entries
1282 */
1283 mutex_lock(&acpi_ioapic_lock);
1284 error = acpi_parse_madt_ioapic_entries();
1285 mutex_unlock(&acpi_ioapic_lock);
1286 if (!error) {
1287 acpi_set_irq_model_ioapic();
1288
1289 smp_found_config = 1;
1290 }
1291 }
1292 if (error == -EINVAL) {
1293 /*
1294 * Dell Precision Workstation 410, 610 come here.
1295 */
1296 printk(KERN_ERR PREFIX
1297 "Invalid BIOS MADT, disabling ACPI\n");
1298 disable_acpi();
1299 }
1300 } else {
1301 /*
1302 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1303 * In the event an MPS table was found, forget it.
1304 * Boot with "acpi=off" to use MPS on such a system.
1305 */
1306 if (smp_found_config) {
1307 printk(KERN_WARNING PREFIX
1308 "No APIC-table, disabling MPS\n");
1309 smp_found_config = 0;
1310 }
1311 }
1312
1313 /*
1314 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1315 * processors, where MPS only supports physical.
1316 */
1317 if (acpi_lapic && acpi_ioapic)
1318 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1319 "information\n");
1320 else if (acpi_lapic)
1321 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1322 "configuration information\n");
1323 #endif
1324 return;
1325 }
1326
1327 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1328 {
1329 if (!acpi_force) {
1330 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1331 d->ident);
1332 acpi_noirq_set();
1333 }
1334 return 0;
1335 }
1336
1337 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1338 {
1339 if (!acpi_force) {
1340 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1341 d->ident);
1342 acpi_disable_pci();
1343 }
1344 return 0;
1345 }
1346
1347 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1348 {
1349 if (!acpi_force) {
1350 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1351 disable_acpi();
1352 } else {
1353 printk(KERN_NOTICE
1354 "Warning: DMI blacklist says broken, but acpi forced\n");
1355 }
1356 return 0;
1357 }
1358
1359 /*
1360 * Force ignoring BIOS IRQ0 override
1361 */
1362 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1363 {
1364 if (!acpi_skip_timer_override) {
1365 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1366 d->ident);
1367 acpi_skip_timer_override = 1;
1368 }
1369 return 0;
1370 }
1371
1372 /*
1373 * ACPI offers an alternative platform interface model that removes
1374 * ACPI hardware requirements for platforms that do not implement
1375 * the PC Architecture.
1376 *
1377 * We initialize the Hardware-reduced ACPI model here:
1378 */
1379 static void __init acpi_reduced_hw_init(void)
1380 {
1381 if (acpi_gbl_reduced_hardware) {
1382 /*
1383 * Override x86_init functions and bypass legacy pic
1384 * in Hardware-reduced ACPI mode
1385 */
1386 x86_init.timers.timer_init = x86_init_noop;
1387 x86_init.irqs.pre_vector_init = x86_init_noop;
1388 legacy_pic = &null_legacy_pic;
1389 }
1390 }
1391
1392 /*
1393 * If your system is blacklisted here, but you find that acpi=force
1394 * works for you, please contact linux-acpi@vger.kernel.org
1395 */
1396 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1397 /*
1398 * Boxes that need ACPI disabled
1399 */
1400 {
1401 .callback = dmi_disable_acpi,
1402 .ident = "IBM Thinkpad",
1403 .matches = {
1404 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1405 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1406 },
1407 },
1408
1409 /*
1410 * Boxes that need ACPI PCI IRQ routing disabled
1411 */
1412 {
1413 .callback = disable_acpi_irq,
1414 .ident = "ASUS A7V",
1415 .matches = {
1416 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1417 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1418 /* newer BIOS, Revision 1011, does work */
1419 DMI_MATCH(DMI_BIOS_VERSION,
1420 "ASUS A7V ACPI BIOS Revision 1007"),
1421 },
1422 },
1423 {
1424 /*
1425 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1426 * for LPC bridge, which is needed for the PCI
1427 * interrupt links to work. DSDT fix is in bug 5966.
1428 * 2645, 2646 model numbers are shared with 600/600E/600X
1429 */
1430 .callback = disable_acpi_irq,
1431 .ident = "IBM Thinkpad 600 Series 2645",
1432 .matches = {
1433 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1434 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1435 },
1436 },
1437 {
1438 .callback = disable_acpi_irq,
1439 .ident = "IBM Thinkpad 600 Series 2646",
1440 .matches = {
1441 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1442 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1443 },
1444 },
1445 /*
1446 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1447 */
1448 { /* _BBN 0 bug */
1449 .callback = disable_acpi_pci,
1450 .ident = "ASUS PR-DLS",
1451 .matches = {
1452 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1453 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1454 DMI_MATCH(DMI_BIOS_VERSION,
1455 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1456 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1457 },
1458 },
1459 {
1460 .callback = disable_acpi_pci,
1461 .ident = "Acer TravelMate 36x Laptop",
1462 .matches = {
1463 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1465 },
1466 },
1467 {}
1468 };
1469
1470 /* second table for DMI checks that should run after early-quirks */
1471 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1472 /*
1473 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1474 * which includes some code which overrides all temperature
1475 * trip points to 16C if the INTIN2 input of the I/O APIC
1476 * is enabled. This input is incorrectly designated the
1477 * ISA IRQ 0 via an interrupt source override even though
1478 * it is wired to the output of the master 8259A and INTIN0
1479 * is not connected at all. Force ignoring BIOS IRQ0
1480 * override in that cases.
1481 */
1482 {
1483 .callback = dmi_ignore_irq0_timer_override,
1484 .ident = "HP nx6115 laptop",
1485 .matches = {
1486 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1487 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1488 },
1489 },
1490 {
1491 .callback = dmi_ignore_irq0_timer_override,
1492 .ident = "HP NX6125 laptop",
1493 .matches = {
1494 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1495 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1496 },
1497 },
1498 {
1499 .callback = dmi_ignore_irq0_timer_override,
1500 .ident = "HP NX6325 laptop",
1501 .matches = {
1502 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1503 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1504 },
1505 },
1506 {
1507 .callback = dmi_ignore_irq0_timer_override,
1508 .ident = "HP 6715b laptop",
1509 .matches = {
1510 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1511 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1512 },
1513 },
1514 {
1515 .callback = dmi_ignore_irq0_timer_override,
1516 .ident = "FUJITSU SIEMENS",
1517 .matches = {
1518 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1519 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1520 },
1521 },
1522 {}
1523 };
1524
1525 /*
1526 * acpi_boot_table_init() and acpi_boot_init()
1527 * called from setup_arch(), always.
1528 * 1. checksums all tables
1529 * 2. enumerates lapics
1530 * 3. enumerates io-apics
1531 *
1532 * acpi_table_init() is separate to allow reading SRAT without
1533 * other side effects.
1534 *
1535 * side effects of acpi_boot_init:
1536 * acpi_lapic = 1 if LAPIC found
1537 * acpi_ioapic = 1 if IOAPIC found
1538 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1539 * if acpi_blacklisted() acpi_disabled = 1;
1540 * acpi_irq_model=...
1541 * ...
1542 */
1543
1544 void __init acpi_boot_table_init(void)
1545 {
1546 dmi_check_system(acpi_dmi_table);
1547
1548 /*
1549 * If acpi_disabled, bail out
1550 */
1551 if (acpi_disabled)
1552 return;
1553
1554 /*
1555 * Initialize the ACPI boot-time table parser.
1556 */
1557 if (acpi_table_init()) {
1558 disable_acpi();
1559 return;
1560 }
1561
1562 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1563
1564 /*
1565 * blacklist may disable ACPI entirely
1566 */
1567 if (acpi_blacklisted()) {
1568 if (acpi_force) {
1569 printk(KERN_WARNING PREFIX "acpi=force override\n");
1570 } else {
1571 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1572 disable_acpi();
1573 return;
1574 }
1575 }
1576 }
1577
1578 int __init early_acpi_boot_init(void)
1579 {
1580 /*
1581 * If acpi_disabled, bail out
1582 */
1583 if (acpi_disabled)
1584 return 1;
1585
1586 /*
1587 * Process the Multiple APIC Description Table (MADT), if present
1588 */
1589 early_acpi_process_madt();
1590
1591 /*
1592 * Hardware-reduced ACPI mode initialization:
1593 */
1594 acpi_reduced_hw_init();
1595
1596 return 0;
1597 }
1598
1599 int __init acpi_boot_init(void)
1600 {
1601 /* those are executed after early-quirks are executed */
1602 dmi_check_system(acpi_dmi_table_late);
1603
1604 /*
1605 * If acpi_disabled, bail out
1606 */
1607 if (acpi_disabled)
1608 return 1;
1609
1610 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1611
1612 /*
1613 * set sci_int and PM timer address
1614 */
1615 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1616
1617 /*
1618 * Process the Multiple APIC Description Table (MADT), if present
1619 */
1620 acpi_process_madt();
1621
1622 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1623 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1624 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1625
1626 if (!acpi_noirq)
1627 x86_init.pci.init = pci_acpi_init;
1628
1629 /* Do not enable ACPI SPCR console by default */
1630 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1631 return 0;
1632 }
1633
1634 static int __init parse_acpi(char *arg)
1635 {
1636 if (!arg)
1637 return -EINVAL;
1638
1639 /* "acpi=off" disables both ACPI table parsing and interpreter */
1640 if (strcmp(arg, "off") == 0) {
1641 disable_acpi();
1642 }
1643 /* acpi=force to over-ride black-list */
1644 else if (strcmp(arg, "force") == 0) {
1645 acpi_force = 1;
1646 acpi_disabled = 0;
1647 }
1648 /* acpi=strict disables out-of-spec workarounds */
1649 else if (strcmp(arg, "strict") == 0) {
1650 acpi_strict = 1;
1651 }
1652 /* acpi=rsdt use RSDT instead of XSDT */
1653 else if (strcmp(arg, "rsdt") == 0) {
1654 acpi_gbl_do_not_use_xsdt = TRUE;
1655 }
1656 /* "acpi=noirq" disables ACPI interrupt routing */
1657 else if (strcmp(arg, "noirq") == 0) {
1658 acpi_noirq_set();
1659 }
1660 /* "acpi=copy_dsdt" copys DSDT */
1661 else if (strcmp(arg, "copy_dsdt") == 0) {
1662 acpi_gbl_copy_dsdt_locally = 1;
1663 }
1664 /* "acpi=nocmcff" disables FF mode for corrected errors */
1665 else if (strcmp(arg, "nocmcff") == 0) {
1666 acpi_disable_cmcff = 1;
1667 } else {
1668 /* Core will printk when we return error. */
1669 return -EINVAL;
1670 }
1671 return 0;
1672 }
1673 early_param("acpi", parse_acpi);
1674
1675 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1676 static int __init parse_pci(char *arg)
1677 {
1678 if (arg && strcmp(arg, "noacpi") == 0)
1679 acpi_disable_pci();
1680 return 0;
1681 }
1682 early_param("pci", parse_pci);
1683
1684 int __init acpi_mps_check(void)
1685 {
1686 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1687 /* mptable code is not built-in*/
1688 if (acpi_disabled || acpi_noirq) {
1689 printk(KERN_WARNING "MPS support code is not built-in.\n"
1690 "Using acpi=off or acpi=noirq or pci=noacpi "
1691 "may have problem\n");
1692 return 1;
1693 }
1694 #endif
1695 return 0;
1696 }
1697
1698 #ifdef CONFIG_X86_IO_APIC
1699 static int __init parse_acpi_skip_timer_override(char *arg)
1700 {
1701 acpi_skip_timer_override = 1;
1702 return 0;
1703 }
1704 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1705
1706 static int __init parse_acpi_use_timer_override(char *arg)
1707 {
1708 acpi_use_timer_override = 1;
1709 return 0;
1710 }
1711 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1712 #endif /* CONFIG_X86_IO_APIC */
1713
1714 static int __init setup_acpi_sci(char *s)
1715 {
1716 if (!s)
1717 return -EINVAL;
1718 if (!strcmp(s, "edge"))
1719 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1720 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1721 else if (!strcmp(s, "level"))
1722 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1723 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1724 else if (!strcmp(s, "high"))
1725 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1726 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1727 else if (!strcmp(s, "low"))
1728 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1729 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1730 else
1731 return -EINVAL;
1732 return 0;
1733 }
1734 early_param("acpi_sci", setup_acpi_sci);
1735
1736 int __acpi_acquire_global_lock(unsigned int *lock)
1737 {
1738 unsigned int old, new, val;
1739 do {
1740 old = *lock;
1741 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1742 val = cmpxchg(lock, old, new);
1743 } while (unlikely (val != old));
1744 return (new < 3) ? -1 : 0;
1745 }
1746
1747 int __acpi_release_global_lock(unsigned int *lock)
1748 {
1749 unsigned int old, new, val;
1750 do {
1751 old = *lock;
1752 new = old & ~0x3;
1753 val = cmpxchg(lock, old, new);
1754 } while (unlikely (val != old));
1755 return old & 0x1;
1756 }
1757
1758 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1759 {
1760 e820__range_add(addr, size, E820_TYPE_ACPI);
1761 e820__update_table_print();
1762 }
CRIS linux kernel tree