?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
hugetlb: introduce generic version of hugetlb_free_pgd_range
[linux/fpc-iii.git] / arch / x86 / kernel / acpi / boot.c
blobe8fea7ffa30654b59dda3602ada19588c5476dc1
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 #include <asm/setup.h>
52
53 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
54 static int __initdata acpi_force = 0;
55 int acpi_disabled;
56 EXPORT_SYMBOL(acpi_disabled);
57
58 #ifdef CONFIG_X86_64
59 # include <asm/proto.h>
60 #endif /* X86 */
61
62 #define PREFIX "ACPI: "
63
64 int acpi_noirq; /* skip ACPI IRQ initialization */
65 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
66 EXPORT_SYMBOL(acpi_pci_disabled);
67
68 int acpi_lapic;
69 int acpi_ioapic;
70 int acpi_strict;
71 int acpi_disable_cmcff;
72
73 /* ACPI SCI override configuration */
74 u8 acpi_sci_flags __initdata;
75 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
76 int acpi_skip_timer_override __initdata;
77 int acpi_use_timer_override __initdata;
78 int acpi_fix_pin2_polarity __initdata;
79
80 #ifdef CONFIG_X86_LOCAL_APIC
81 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
82 #endif
83
84 #ifdef CONFIG_X86_IO_APIC
85 /*
86 * Locks related to IOAPIC hotplug
87 * Hotplug side:
88 * ->device_hotplug_lock
89 * ->acpi_ioapic_lock
90 * ->ioapic_lock
91 * Interrupt mapping side:
92 * ->acpi_ioapic_lock
93 * ->ioapic_mutex
94 * ->ioapic_lock
95 */
96 static DEFINE_MUTEX(acpi_ioapic_lock);
97 #endif
98
99 /* --------------------------------------------------------------------------
100 Boot-time Configuration
101 -------------------------------------------------------------------------- */
102
103 /*
104 * The default interrupt routing model is PIC (8259). This gets
105 * overridden if IOAPICs are enumerated (below).
106 */
107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
108
109
110 /*
111 * ISA irqs by default are the first 16 gsis but can be
112 * any gsi as specified by an interrupt source override.
113 */
114 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
115 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
116 };
117
118 /*
119 * This is just a simple wrapper around early_memremap(),
120 * with sanity checks for phys == 0 and size == 0.
121 */
122 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
123 {
124
125 if (!phys || !size)
126 return NULL;
127
128 return early_memremap(phys, size);
129 }
130
131 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
132 {
133 if (!map || !size)
134 return;
135
136 early_memunmap(map, size);
137 }
138
139 #ifdef CONFIG_X86_LOCAL_APIC
140 static int __init acpi_parse_madt(struct acpi_table_header *table)
141 {
142 struct acpi_table_madt *madt = NULL;
143
144 if (!boot_cpu_has(X86_FEATURE_APIC))
145 return -EINVAL;
146
147 madt = (struct acpi_table_madt *)table;
148 if (!madt) {
149 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
150 return -ENODEV;
151 }
152
153 if (madt->address) {
154 acpi_lapic_addr = (u64) madt->address;
155
156 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
157 madt->address);
158 }
159
160 default_acpi_madt_oem_check(madt->header.oem_id,
161 madt->header.oem_table_id);
162
163 return 0;
164 }
165
166 /**
167 * acpi_register_lapic - register a local apic and generates a logic cpu number
168 * @id: local apic id to register
169 * @acpiid: ACPI id to register
170 * @enabled: this cpu is enabled or not
171 *
172 * Returns the logic cpu number which maps to the local apic
173 */
174 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
175 {
176 unsigned int ver = 0;
177 int cpu;
178
179 if (id >= MAX_LOCAL_APIC) {
180 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
181 return -EINVAL;
182 }
183
184 if (!enabled) {
185 ++disabled_cpus;
186 return -EINVAL;
187 }
188
189 if (boot_cpu_physical_apicid != -1U)
190 ver = boot_cpu_apic_version;
191
192 cpu = generic_processor_info(id, ver);
193 if (cpu >= 0)
194 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
195
196 return cpu;
197 }
198
199 static int __init
200 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
201 {
202 struct acpi_madt_local_x2apic *processor = NULL;
203 #ifdef CONFIG_X86_X2APIC
204 u32 apic_id;
205 u8 enabled;
206 #endif
207
208 processor = (struct acpi_madt_local_x2apic *)header;
209
210 if (BAD_MADT_ENTRY(processor, end))
211 return -EINVAL;
212
213 acpi_table_print_madt_entry(header);
214
215 #ifdef CONFIG_X86_X2APIC
216 apic_id = processor->local_apic_id;
217 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
218
219 /* Ignore invalid ID */
220 if (apic_id == 0xffffffff)
221 return 0;
222
223 /*
224 * We need to register disabled CPU as well to permit
225 * counting disabled CPUs. This allows us to size
226 * cpus_possible_map more accurately, to permit
227 * to not preallocating memory for all NR_CPUS
228 * when we use CPU hotplug.
229 */
230 if (!apic->apic_id_valid(apic_id)) {
231 if (enabled)
232 pr_warn(PREFIX "x2apic entry ignored\n");
233 return 0;
234 }
235
236 acpi_register_lapic(apic_id, processor->uid, enabled);
237 #else
238 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
239 #endif
240
241 return 0;
242 }
243
244 static int __init
245 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
246 {
247 struct acpi_madt_local_apic *processor = NULL;
248
249 processor = (struct acpi_madt_local_apic *)header;
250
251 if (BAD_MADT_ENTRY(processor, end))
252 return -EINVAL;
253
254 acpi_table_print_madt_entry(header);
255
256 /* Ignore invalid ID */
257 if (processor->id == 0xff)
258 return 0;
259
260 /*
261 * We need to register disabled CPU as well to permit
262 * counting disabled CPUs. This allows us to size
263 * cpus_possible_map more accurately, to permit
264 * to not preallocating memory for all NR_CPUS
265 * when we use CPU hotplug.
266 */
267 acpi_register_lapic(processor->id, /* APIC ID */
268 processor->processor_id, /* ACPI ID */
269 processor->lapic_flags & ACPI_MADT_ENABLED);
270
271 return 0;
272 }
273
274 static int __init
275 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
276 {
277 struct acpi_madt_local_sapic *processor = NULL;
278
279 processor = (struct acpi_madt_local_sapic *)header;
280
281 if (BAD_MADT_ENTRY(processor, end))
282 return -EINVAL;
283
284 acpi_table_print_madt_entry(header);
285
286 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
287 processor->processor_id, /* ACPI ID */
288 processor->lapic_flags & ACPI_MADT_ENABLED);
289
290 return 0;
291 }
292
293 static int __init
294 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
295 const unsigned long end)
296 {
297 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
298
299 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
300
301 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
302 return -EINVAL;
303
304 acpi_table_print_madt_entry(header);
305
306 acpi_lapic_addr = lapic_addr_ovr->address;
307
308 return 0;
309 }
310
311 static int __init
312 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
313 const unsigned long end)
314 {
315 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
316
317 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
318
319 if (BAD_MADT_ENTRY(x2apic_nmi, end))
320 return -EINVAL;
321
322 acpi_table_print_madt_entry(header);
323
324 if (x2apic_nmi->lint != 1)
325 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
326
327 return 0;
328 }
329
330 static int __init
331 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
332 {
333 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
334
335 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
336
337 if (BAD_MADT_ENTRY(lapic_nmi, end))
338 return -EINVAL;
339
340 acpi_table_print_madt_entry(header);
341
342 if (lapic_nmi->lint != 1)
343 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
344
345 return 0;
346 }
347
348 #endif /*CONFIG_X86_LOCAL_APIC */
349
350 #ifdef CONFIG_X86_IO_APIC
351 #define MP_ISA_BUS 0
352
353 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
354 u8 trigger, u32 gsi);
355
356 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
357 u32 gsi)
358 {
359 /*
360 * Check bus_irq boundary.
361 */
362 if (bus_irq >= NR_IRQS_LEGACY) {
363 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
364 return;
365 }
366
367 /*
368 * TBD: This check is for faulty timer entries, where the override
369 * erroneously sets the trigger to level, resulting in a HUGE
370 * increase of timer interrupts!
371 */
372 if ((bus_irq == 0) && (trigger == 3))
373 trigger = 1;
374
375 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
376 return;
377 /*
378 * Reset default identity mapping if gsi is also an legacy IRQ,
379 * otherwise there will be more than one entry with the same GSI
380 * and acpi_isa_irq_to_gsi() may give wrong result.
381 */
382 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
383 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
384 isa_irq_to_gsi[bus_irq] = gsi;
385 }
386
387 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
388 int polarity)
389 {
390 #ifdef CONFIG_X86_MPPARSE
391 struct mpc_intsrc mp_irq;
392 struct pci_dev *pdev;
393 unsigned char number;
394 unsigned int devfn;
395 int ioapic;
396 u8 pin;
397
398 if (!acpi_ioapic)
399 return 0;
400 if (!dev || !dev_is_pci(dev))
401 return 0;
402
403 pdev = to_pci_dev(dev);
404 number = pdev->bus->number;
405 devfn = pdev->devfn;
406 pin = pdev->pin;
407 /* print the entry should happen on mptable identically */
408 mp_irq.type = MP_INTSRC;
409 mp_irq.irqtype = mp_INT;
410 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
411 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
412 mp_irq.srcbus = number;
413 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
414 ioapic = mp_find_ioapic(gsi);
415 mp_irq.dstapic = mpc_ioapic_id(ioapic);
416 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
417
418 mp_save_irq(&mp_irq);
419 #endif
420 return 0;
421 }
422
423 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
424 u8 trigger, u32 gsi)
425 {
426 struct mpc_intsrc mp_irq;
427 int ioapic, pin;
428
429 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
430 ioapic = mp_find_ioapic(gsi);
431 if (ioapic < 0) {
432 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
433 return ioapic;
434 }
435
436 pin = mp_find_ioapic_pin(ioapic, gsi);
437
438 mp_irq.type = MP_INTSRC;
439 mp_irq.irqtype = mp_INT;
440 mp_irq.irqflag = (trigger << 2) | polarity;
441 mp_irq.srcbus = MP_ISA_BUS;
442 mp_irq.srcbusirq = bus_irq;
443 mp_irq.dstapic = mpc_ioapic_id(ioapic);
444 mp_irq.dstirq = pin;
445
446 mp_save_irq(&mp_irq);
447
448 return 0;
449 }
450
451 static int __init
452 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
453 {
454 struct acpi_madt_io_apic *ioapic = NULL;
455 struct ioapic_domain_cfg cfg = {
456 .type = IOAPIC_DOMAIN_DYNAMIC,
457 .ops = &mp_ioapic_irqdomain_ops,
458 };
459
460 ioapic = (struct acpi_madt_io_apic *)header;
461
462 if (BAD_MADT_ENTRY(ioapic, end))
463 return -EINVAL;
464
465 acpi_table_print_madt_entry(header);
466
467 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
468 if (ioapic->global_irq_base < nr_legacy_irqs())
469 cfg.type = IOAPIC_DOMAIN_LEGACY;
470
471 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
472 &cfg);
473
474 return 0;
475 }
476
477 /*
478 * Parse Interrupt Source Override for the ACPI SCI
479 */
480 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
481 {
482 if (trigger == 0) /* compatible SCI trigger is level */
483 trigger = 3;
484
485 if (polarity == 0) /* compatible SCI polarity is low */
486 polarity = 3;
487
488 /* Command-line over-ride via acpi_sci= */
489 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
490 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
491
492 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
493 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
494
495 if (bus_irq < NR_IRQS_LEGACY)
496 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
497 else
498 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
499
500 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
501
502 /*
503 * stash over-ride to indicate we've been here
504 * and for later update of acpi_gbl_FADT
505 */
506 acpi_sci_override_gsi = gsi;
507 return;
508 }
509
510 static int __init
511 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
512 const unsigned long end)
513 {
514 struct acpi_madt_interrupt_override *intsrc = NULL;
515
516 intsrc = (struct acpi_madt_interrupt_override *)header;
517
518 if (BAD_MADT_ENTRY(intsrc, end))
519 return -EINVAL;
520
521 acpi_table_print_madt_entry(header);
522
523 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
524 acpi_sci_ioapic_setup(intsrc->source_irq,
525 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
526 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
527 intsrc->global_irq);
528 return 0;
529 }
530
531 if (intsrc->source_irq == 0) {
532 if (acpi_skip_timer_override) {
533 printk(PREFIX "BIOS IRQ0 override ignored.\n");
534 return 0;
535 }
536
537 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
538 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
539 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
540 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
541 }
542 }
543
544 mp_override_legacy_irq(intsrc->source_irq,
545 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
546 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
547 intsrc->global_irq);
548
549 return 0;
550 }
551
552 static int __init
553 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
554 {
555 struct acpi_madt_nmi_source *nmi_src = NULL;
556
557 nmi_src = (struct acpi_madt_nmi_source *)header;
558
559 if (BAD_MADT_ENTRY(nmi_src, end))
560 return -EINVAL;
561
562 acpi_table_print_madt_entry(header);
563
564 /* TBD: Support nimsrc entries? */
565
566 return 0;
567 }
568
569 #endif /* CONFIG_X86_IO_APIC */
570
571 /*
572 * acpi_pic_sci_set_trigger()
573 *
574 * use ELCR to set PIC-mode trigger type for SCI
575 *
576 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
577 * it may require Edge Trigger -- use "acpi_sci=edge"
578 *
579 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
580 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
581 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
582 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
583 */
584
585 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
586 {
587 unsigned int mask = 1 << irq;
588 unsigned int old, new;
589
590 /* Real old ELCR mask */
591 old = inb(0x4d0) | (inb(0x4d1) << 8);
592
593 /*
594 * If we use ACPI to set PCI IRQs, then we should clear ELCR
595 * since we will set it correctly as we enable the PCI irq
596 * routing.
597 */
598 new = acpi_noirq ? old : 0;
599
600 /*
601 * Update SCI information in the ELCR, it isn't in the PCI
602 * routing tables..
603 */
604 switch (trigger) {
605 case 1: /* Edge - clear */
606 new &= ~mask;
607 break;
608 case 3: /* Level - set */
609 new |= mask;
610 break;
611 }
612
613 if (old == new)
614 return;
615
616 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
617 outb(new, 0x4d0);
618 outb(new >> 8, 0x4d1);
619 }
620
621 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
622 {
623 int rc, irq, trigger, polarity;
624
625 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
626 *irqp = gsi;
627 return 0;
628 }
629
630 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
631 if (rc)
632 return rc;
633
634 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
635 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
636 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
637 if (irq < 0)
638 return irq;
639
640 *irqp = irq;
641 return 0;
642 }
643 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
644
645 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
646 {
647 if (isa_irq < nr_legacy_irqs() &&
648 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
649 *gsi = isa_irq_to_gsi[isa_irq];
650 return 0;
651 }
652
653 return -1;
654 }
655
656 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
657 int trigger, int polarity)
658 {
659 #ifdef CONFIG_PCI
660 /*
661 * Make sure all (legacy) PCI IRQs are set as level-triggered.
662 */
663 if (trigger == ACPI_LEVEL_SENSITIVE)
664 elcr_set_level_irq(gsi);
665 #endif
666
667 return gsi;
668 }
669
670 #ifdef CONFIG_X86_LOCAL_APIC
671 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
672 int trigger, int polarity)
673 {
674 int irq = gsi;
675 #ifdef CONFIG_X86_IO_APIC
676 int node;
677 struct irq_alloc_info info;
678
679 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
680 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
681 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
682 ioapic_set_alloc_attr(&info, node, trigger, polarity);
683
684 mutex_lock(&acpi_ioapic_lock);
685 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
686 /* Don't set up the ACPI SCI because it's already set up */
687 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
688 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
689 mutex_unlock(&acpi_ioapic_lock);
690 #endif
691
692 return irq;
693 }
694
695 static void acpi_unregister_gsi_ioapic(u32 gsi)
696 {
697 #ifdef CONFIG_X86_IO_APIC
698 int irq;
699
700 mutex_lock(&acpi_ioapic_lock);
701 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
702 if (irq > 0)
703 mp_unmap_irq(irq);
704 mutex_unlock(&acpi_ioapic_lock);
705 #endif
706 }
707 #endif
708
709 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
710 int trigger, int polarity) = acpi_register_gsi_pic;
711 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
712
713 #ifdef CONFIG_ACPI_SLEEP
714 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
715 #else
716 int (*acpi_suspend_lowlevel)(void);
717 #endif
718
719 /*
720 * success: return IRQ number (>=0)
721 * failure: return < 0
722 */
723 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
724 {
725 return __acpi_register_gsi(dev, gsi, trigger, polarity);
726 }
727 EXPORT_SYMBOL_GPL(acpi_register_gsi);
728
729 void acpi_unregister_gsi(u32 gsi)
730 {
731 if (__acpi_unregister_gsi)
732 __acpi_unregister_gsi(gsi);
733 }
734 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
735
736 #ifdef CONFIG_X86_LOCAL_APIC
737 static void __init acpi_set_irq_model_ioapic(void)
738 {
739 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
740 __acpi_register_gsi = acpi_register_gsi_ioapic;
741 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
742 acpi_ioapic = 1;
743 }
744 #endif
745
746 /*
747 * ACPI based hotplug support for CPU
748 */
749 #ifdef CONFIG_ACPI_HOTPLUG_CPU
750 #include <acpi/processor.h>
751
752 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
753 {
754 #ifdef CONFIG_ACPI_NUMA
755 int nid;
756
757 nid = acpi_get_node(handle);
758 if (nid != NUMA_NO_NODE) {
759 set_apicid_to_node(physid, nid);
760 numa_set_node(cpu, nid);
761 }
762 #endif
763 return 0;
764 }
765
766 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
767 int *pcpu)
768 {
769 int cpu;
770
771 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
772 if (cpu < 0) {
773 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
774 return cpu;
775 }
776
777 acpi_processor_set_pdc(handle);
778 acpi_map_cpu2node(handle, cpu, physid);
779
780 *pcpu = cpu;
781 return 0;
782 }
783 EXPORT_SYMBOL(acpi_map_cpu);
784
785 int acpi_unmap_cpu(int cpu)
786 {
787 #ifdef CONFIG_ACPI_NUMA
788 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
789 #endif
790
791 per_cpu(x86_cpu_to_apicid, cpu) = -1;
792 set_cpu_present(cpu, false);
793 num_processors--;
794
795 return (0);
796 }
797 EXPORT_SYMBOL(acpi_unmap_cpu);
798 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
799
800 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
801 {
802 int ret = -ENOSYS;
803 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
804 int ioapic_id;
805 u64 addr;
806 struct ioapic_domain_cfg cfg = {
807 .type = IOAPIC_DOMAIN_DYNAMIC,
808 .ops = &mp_ioapic_irqdomain_ops,
809 };
810
811 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
812 if (ioapic_id < 0) {
813 unsigned long long uid;
814 acpi_status status;
815
816 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
817 NULL, &uid);
818 if (ACPI_FAILURE(status)) {
819 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
820 return -EINVAL;
821 }
822 ioapic_id = (int)uid;
823 }
824
825 mutex_lock(&acpi_ioapic_lock);
826 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
827 mutex_unlock(&acpi_ioapic_lock);
828 #endif
829
830 return ret;
831 }
832 EXPORT_SYMBOL(acpi_register_ioapic);
833
834 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
835 {
836 int ret = -ENOSYS;
837
838 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
839 mutex_lock(&acpi_ioapic_lock);
840 ret = mp_unregister_ioapic(gsi_base);
841 mutex_unlock(&acpi_ioapic_lock);
842 #endif
843
844 return ret;
845 }
846 EXPORT_SYMBOL(acpi_unregister_ioapic);
847
848 /**
849 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
850 * has been registered
851 * @handle: ACPI handle of the IOAPIC deivce
852 * @gsi_base: GSI base associated with the IOAPIC
853 *
854 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
855 * with acpi_register_ioapic()/acpi_unregister_ioapic().
856 */
857 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
858 {
859 int ret = 0;
860
861 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
862 mutex_lock(&acpi_ioapic_lock);
863 ret = mp_ioapic_registered(gsi_base);
864 mutex_unlock(&acpi_ioapic_lock);
865 #endif
866
867 return ret;
868 }
869
870 static int __init acpi_parse_sbf(struct acpi_table_header *table)
871 {
872 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
873
874 sbf_port = sb->cmos_index; /* Save CMOS port */
875
876 return 0;
877 }
878
879 #ifdef CONFIG_HPET_TIMER
880 #include <asm/hpet.h>
881
882 static struct resource *hpet_res __initdata;
883
884 static int __init acpi_parse_hpet(struct acpi_table_header *table)
885 {
886 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
887
888 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
889 printk(KERN_WARNING PREFIX "HPET timers must be located in "
890 "memory.\n");
891 return -1;
892 }
893
894 hpet_address = hpet_tbl->address.address;
895 hpet_blockid = hpet_tbl->sequence;
896
897 /*
898 * Some broken BIOSes advertise HPET at 0x0. We really do not
899 * want to allocate a resource there.
900 */
901 if (!hpet_address) {
902 printk(KERN_WARNING PREFIX
903 "HPET id: %#x base: %#lx is invalid\n",
904 hpet_tbl->id, hpet_address);
905 return 0;
906 }
907 #ifdef CONFIG_X86_64
908 /*
909 * Some even more broken BIOSes advertise HPET at
910 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
911 * some noise:
912 */
913 if (hpet_address == 0xfed0000000000000UL) {
914 if (!hpet_force_user) {
915 printk(KERN_WARNING PREFIX "HPET id: %#x "
916 "base: 0xfed0000000000000 is bogus\n "
917 "try hpet=force on the kernel command line to "
918 "fix it up to 0xfed00000.\n", hpet_tbl->id);
919 hpet_address = 0;
920 return 0;
921 }
922 printk(KERN_WARNING PREFIX
923 "HPET id: %#x base: 0xfed0000000000000 fixed up "
924 "to 0xfed00000.\n", hpet_tbl->id);
925 hpet_address >>= 32;
926 }
927 #endif
928 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
929 hpet_tbl->id, hpet_address);
930
931 /*
932 * Allocate and initialize the HPET firmware resource for adding into
933 * the resource tree during the lateinit timeframe.
934 */
935 #define HPET_RESOURCE_NAME_SIZE 9
936 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
937
938 hpet_res->name = (void *)&hpet_res[1];
939 hpet_res->flags = IORESOURCE_MEM;
940 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
941 hpet_tbl->sequence);
942
943 hpet_res->start = hpet_address;
944 hpet_res->end = hpet_address + (1 * 1024) - 1;
945
946 return 0;
947 }
948
949 /*
950 * hpet_insert_resource inserts the HPET resources used into the resource
951 * tree.
952 */
953 static __init int hpet_insert_resource(void)
954 {
955 if (!hpet_res)
956 return 1;
957
958 return insert_resource(&iomem_resource, hpet_res);
959 }
960
961 late_initcall(hpet_insert_resource);
962
963 #else
964 #define acpi_parse_hpet NULL
965 #endif
966
967 static int __init acpi_parse_fadt(struct acpi_table_header *table)
968 {
969 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
970 pr_debug("ACPI: no legacy devices present\n");
971 x86_platform.legacy.devices.pnpbios = 0;
972 }
973
974 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
975 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
976 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
977 pr_debug("ACPI: i8042 controller is absent\n");
978 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
979 }
980
981 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
982 pr_debug("ACPI: not registering RTC platform device\n");
983 x86_platform.legacy.rtc = 0;
984 }
985
986 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
987 pr_debug("ACPI: probing for VGA not safe\n");
988 x86_platform.legacy.no_vga = 1;
989 }
990
991 #ifdef CONFIG_X86_PM_TIMER
992 /* detect the location of the ACPI PM Timer */
993 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
994 /* FADT rev. 2 */
995 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
996 ACPI_ADR_SPACE_SYSTEM_IO)
997 return 0;
998
999 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
1000 /*
1001 * "X" fields are optional extensions to the original V1.0
1002 * fields, so we must selectively expand V1.0 fields if the
1003 * corresponding X field is zero.
1004 */
1005 if (!pmtmr_ioport)
1006 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1007 } else {
1008 /* FADT rev. 1 */
1009 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1010 }
1011 if (pmtmr_ioport)
1012 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1013 pmtmr_ioport);
1014 #endif
1015 return 0;
1016 }
1017
1018 #ifdef CONFIG_X86_LOCAL_APIC
1019 /*
1020 * Parse LAPIC entries in MADT
1021 * returns 0 on success, < 0 on error
1022 */
1023
1024 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1025 {
1026 int count;
1027
1028 if (!boot_cpu_has(X86_FEATURE_APIC))
1029 return -ENODEV;
1030
1031 /*
1032 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1033 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1034 */
1035
1036 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1037 acpi_parse_lapic_addr_ovr, 0);
1038 if (count < 0) {
1039 printk(KERN_ERR PREFIX
1040 "Error parsing LAPIC address override entry\n");
1041 return count;
1042 }
1043
1044 register_lapic_address(acpi_lapic_addr);
1045
1046 return count;
1047 }
1048
1049 static int __init acpi_parse_madt_lapic_entries(void)
1050 {
1051 int count;
1052 int x2count = 0;
1053 int ret;
1054 struct acpi_subtable_proc madt_proc[2];
1055
1056 if (!boot_cpu_has(X86_FEATURE_APIC))
1057 return -ENODEV;
1058
1059 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1060 acpi_parse_sapic, MAX_LOCAL_APIC);
1061
1062 if (!count) {
1063 memset(madt_proc, 0, sizeof(madt_proc));
1064 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1065 madt_proc[0].handler = acpi_parse_lapic;
1066 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1067 madt_proc[1].handler = acpi_parse_x2apic;
1068 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1069 sizeof(struct acpi_table_madt),
1070 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1071 if (ret < 0) {
1072 printk(KERN_ERR PREFIX
1073 "Error parsing LAPIC/X2APIC entries\n");
1074 return ret;
1075 }
1076
1077 count = madt_proc[0].count;
1078 x2count = madt_proc[1].count;
1079 }
1080 if (!count && !x2count) {
1081 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1082 /* TBD: Cleanup to allow fallback to MPS */
1083 return -ENODEV;
1084 } else if (count < 0 || x2count < 0) {
1085 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1086 /* TBD: Cleanup to allow fallback to MPS */
1087 return count;
1088 }
1089
1090 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1091 acpi_parse_x2apic_nmi, 0);
1092 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1093 acpi_parse_lapic_nmi, 0);
1094 if (count < 0 || x2count < 0) {
1095 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1096 /* TBD: Cleanup to allow fallback to MPS */
1097 return count;
1098 }
1099 return 0;
1100 }
1101 #endif /* CONFIG_X86_LOCAL_APIC */
1102
1103 #ifdef CONFIG_X86_IO_APIC
1104 static void __init mp_config_acpi_legacy_irqs(void)
1105 {
1106 int i;
1107 struct mpc_intsrc mp_irq;
1108
1109 #ifdef CONFIG_EISA
1110 /*
1111 * Fabricate the legacy ISA bus (bus #31).
1112 */
1113 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1114 #endif
1115 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1116 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1117
1118 /*
1119 * Use the default configuration for the IRQs 0-15. Unless
1120 * overridden by (MADT) interrupt source override entries.
1121 */
1122 for (i = 0; i < nr_legacy_irqs(); i++) {
1123 int ioapic, pin;
1124 unsigned int dstapic;
1125 int idx;
1126 u32 gsi;
1127
1128 /* Locate the gsi that irq i maps to. */
1129 if (acpi_isa_irq_to_gsi(i, &gsi))
1130 continue;
1131
1132 /*
1133 * Locate the IOAPIC that manages the ISA IRQ.
1134 */
1135 ioapic = mp_find_ioapic(gsi);
1136 if (ioapic < 0)
1137 continue;
1138 pin = mp_find_ioapic_pin(ioapic, gsi);
1139 dstapic = mpc_ioapic_id(ioapic);
1140
1141 for (idx = 0; idx < mp_irq_entries; idx++) {
1142 struct mpc_intsrc *irq = mp_irqs + idx;
1143
1144 /* Do we already have a mapping for this ISA IRQ? */
1145 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1146 break;
1147
1148 /* Do we already have a mapping for this IOAPIC pin */
1149 if (irq->dstapic == dstapic && irq->dstirq == pin)
1150 break;
1151 }
1152
1153 if (idx != mp_irq_entries) {
1154 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1155 continue; /* IRQ already used */
1156 }
1157
1158 mp_irq.type = MP_INTSRC;
1159 mp_irq.irqflag = 0; /* Conforming */
1160 mp_irq.srcbus = MP_ISA_BUS;
1161 mp_irq.dstapic = dstapic;
1162 mp_irq.irqtype = mp_INT;
1163 mp_irq.srcbusirq = i; /* Identity mapped */
1164 mp_irq.dstirq = pin;
1165
1166 mp_save_irq(&mp_irq);
1167 }
1168 }
1169
1170 /*
1171 * Parse IOAPIC related entries in MADT
1172 * returns 0 on success, < 0 on error
1173 */
1174 static int __init acpi_parse_madt_ioapic_entries(void)
1175 {
1176 int count;
1177
1178 /*
1179 * ACPI interpreter is required to complete interrupt setup,
1180 * so if it is off, don't enumerate the io-apics with ACPI.
1181 * If MPS is present, it will handle them,
1182 * otherwise the system will stay in PIC mode
1183 */
1184 if (acpi_disabled || acpi_noirq)
1185 return -ENODEV;
1186
1187 if (!boot_cpu_has(X86_FEATURE_APIC))
1188 return -ENODEV;
1189
1190 /*
1191 * if "noapic" boot option, don't look for IO-APICs
1192 */
1193 if (skip_ioapic_setup) {
1194 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1195 "due to 'noapic' option.\n");
1196 return -ENODEV;
1197 }
1198
1199 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1200 MAX_IO_APICS);
1201 if (!count) {
1202 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1203 return -ENODEV;
1204 } else if (count < 0) {
1205 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1206 return count;
1207 }
1208
1209 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1210 acpi_parse_int_src_ovr, nr_irqs);
1211 if (count < 0) {
1212 printk(KERN_ERR PREFIX
1213 "Error parsing interrupt source overrides entry\n");
1214 /* TBD: Cleanup to allow fallback to MPS */
1215 return count;
1216 }
1217
1218 /*
1219 * If BIOS did not supply an INT_SRC_OVR for the SCI
1220 * pretend we got one so we can set the SCI flags.
1221 * But ignore setting up SCI on hardware reduced platforms.
1222 */
1223 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1224 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1225 acpi_gbl_FADT.sci_interrupt);
1226
1227 /* Fill in identity legacy mappings where no override */
1228 mp_config_acpi_legacy_irqs();
1229
1230 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1231 acpi_parse_nmi_src, nr_irqs);
1232 if (count < 0) {
1233 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1234 /* TBD: Cleanup to allow fallback to MPS */
1235 return count;
1236 }
1237
1238 return 0;
1239 }
1240 #else
1241 static inline int acpi_parse_madt_ioapic_entries(void)
1242 {
1243 return -1;
1244 }
1245 #endif /* !CONFIG_X86_IO_APIC */
1246
1247 static void __init early_acpi_process_madt(void)
1248 {
1249 #ifdef CONFIG_X86_LOCAL_APIC
1250 int error;
1251
1252 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1253
1254 /*
1255 * Parse MADT LAPIC entries
1256 */
1257 error = early_acpi_parse_madt_lapic_addr_ovr();
1258 if (!error) {
1259 acpi_lapic = 1;
1260 smp_found_config = 1;
1261 }
1262 if (error == -EINVAL) {
1263 /*
1264 * Dell Precision Workstation 410, 610 come here.
1265 */
1266 printk(KERN_ERR PREFIX
1267 "Invalid BIOS MADT, disabling ACPI\n");
1268 disable_acpi();
1269 }
1270 }
1271 #endif
1272 }
1273
1274 static void __init acpi_process_madt(void)
1275 {
1276 #ifdef CONFIG_X86_LOCAL_APIC
1277 int error;
1278
1279 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1280
1281 /*
1282 * Parse MADT LAPIC entries
1283 */
1284 error = acpi_parse_madt_lapic_entries();
1285 if (!error) {
1286 acpi_lapic = 1;
1287
1288 /*
1289 * Parse MADT IO-APIC entries
1290 */
1291 mutex_lock(&acpi_ioapic_lock);
1292 error = acpi_parse_madt_ioapic_entries();
1293 mutex_unlock(&acpi_ioapic_lock);
1294 if (!error) {
1295 acpi_set_irq_model_ioapic();
1296
1297 smp_found_config = 1;
1298 }
1299 }
1300 if (error == -EINVAL) {
1301 /*
1302 * Dell Precision Workstation 410, 610 come here.
1303 */
1304 printk(KERN_ERR PREFIX
1305 "Invalid BIOS MADT, disabling ACPI\n");
1306 disable_acpi();
1307 }
1308 } else {
1309 /*
1310 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1311 * In the event an MPS table was found, forget it.
1312 * Boot with "acpi=off" to use MPS on such a system.
1313 */
1314 if (smp_found_config) {
1315 printk(KERN_WARNING PREFIX
1316 "No APIC-table, disabling MPS\n");
1317 smp_found_config = 0;
1318 }
1319 }
1320
1321 /*
1322 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1323 * processors, where MPS only supports physical.
1324 */
1325 if (acpi_lapic && acpi_ioapic)
1326 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1327 "information\n");
1328 else if (acpi_lapic)
1329 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1330 "configuration information\n");
1331 #endif
1332 return;
1333 }
1334
1335 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1336 {
1337 if (!acpi_force) {
1338 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1339 d->ident);
1340 acpi_noirq_set();
1341 }
1342 return 0;
1343 }
1344
1345 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1346 {
1347 if (!acpi_force) {
1348 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1349 d->ident);
1350 acpi_disable_pci();
1351 }
1352 return 0;
1353 }
1354
1355 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1356 {
1357 if (!acpi_force) {
1358 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1359 disable_acpi();
1360 } else {
1361 printk(KERN_NOTICE
1362 "Warning: DMI blacklist says broken, but acpi forced\n");
1363 }
1364 return 0;
1365 }
1366
1367 /*
1368 * Force ignoring BIOS IRQ0 override
1369 */
1370 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1371 {
1372 if (!acpi_skip_timer_override) {
1373 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1374 d->ident);
1375 acpi_skip_timer_override = 1;
1376 }
1377 return 0;
1378 }
1379
1380 /*
1381 * ACPI offers an alternative platform interface model that removes
1382 * ACPI hardware requirements for platforms that do not implement
1383 * the PC Architecture.
1384 *
1385 * We initialize the Hardware-reduced ACPI model here:
1386 */
1387 void __init acpi_generic_reduced_hw_init(void)
1388 {
1389 /*
1390 * Override x86_init functions and bypass legacy PIC in
1391 * hardware reduced ACPI mode.
1392 */
1393 x86_init.timers.timer_init = x86_init_noop;
1394 x86_init.irqs.pre_vector_init = x86_init_noop;
1395 legacy_pic = &null_legacy_pic;
1396 }
1397
1398 static void __init acpi_reduced_hw_init(void)
1399 {
1400 if (acpi_gbl_reduced_hardware)
1401 x86_init.acpi.reduced_hw_early_init();
1402 }
1403
1404 /*
1405 * If your system is blacklisted here, but you find that acpi=force
1406 * works for you, please contact linux-acpi@vger.kernel.org
1407 */
1408 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1409 /*
1410 * Boxes that need ACPI disabled
1411 */
1412 {
1413 .callback = dmi_disable_acpi,
1414 .ident = "IBM Thinkpad",
1415 .matches = {
1416 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1417 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1418 },
1419 },
1420
1421 /*
1422 * Boxes that need ACPI PCI IRQ routing disabled
1423 */
1424 {
1425 .callback = disable_acpi_irq,
1426 .ident = "ASUS A7V",
1427 .matches = {
1428 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1429 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1430 /* newer BIOS, Revision 1011, does work */
1431 DMI_MATCH(DMI_BIOS_VERSION,
1432 "ASUS A7V ACPI BIOS Revision 1007"),
1433 },
1434 },
1435 {
1436 /*
1437 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1438 * for LPC bridge, which is needed for the PCI
1439 * interrupt links to work. DSDT fix is in bug 5966.
1440 * 2645, 2646 model numbers are shared with 600/600E/600X
1441 */
1442 .callback = disable_acpi_irq,
1443 .ident = "IBM Thinkpad 600 Series 2645",
1444 .matches = {
1445 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1446 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1447 },
1448 },
1449 {
1450 .callback = disable_acpi_irq,
1451 .ident = "IBM Thinkpad 600 Series 2646",
1452 .matches = {
1453 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1454 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1455 },
1456 },
1457 /*
1458 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1459 */
1460 { /* _BBN 0 bug */
1461 .callback = disable_acpi_pci,
1462 .ident = "ASUS PR-DLS",
1463 .matches = {
1464 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1465 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1466 DMI_MATCH(DMI_BIOS_VERSION,
1467 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1468 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1469 },
1470 },
1471 {
1472 .callback = disable_acpi_pci,
1473 .ident = "Acer TravelMate 36x Laptop",
1474 .matches = {
1475 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1476 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1477 },
1478 },
1479 {}
1480 };
1481
1482 /* second table for DMI checks that should run after early-quirks */
1483 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1484 /*
1485 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1486 * which includes some code which overrides all temperature
1487 * trip points to 16C if the INTIN2 input of the I/O APIC
1488 * is enabled. This input is incorrectly designated the
1489 * ISA IRQ 0 via an interrupt source override even though
1490 * it is wired to the output of the master 8259A and INTIN0
1491 * is not connected at all. Force ignoring BIOS IRQ0
1492 * override in that cases.
1493 */
1494 {
1495 .callback = dmi_ignore_irq0_timer_override,
1496 .ident = "HP nx6115 laptop",
1497 .matches = {
1498 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1499 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1500 },
1501 },
1502 {
1503 .callback = dmi_ignore_irq0_timer_override,
1504 .ident = "HP NX6125 laptop",
1505 .matches = {
1506 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1507 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1508 },
1509 },
1510 {
1511 .callback = dmi_ignore_irq0_timer_override,
1512 .ident = "HP NX6325 laptop",
1513 .matches = {
1514 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1515 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1516 },
1517 },
1518 {
1519 .callback = dmi_ignore_irq0_timer_override,
1520 .ident = "HP 6715b laptop",
1521 .matches = {
1522 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1523 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1524 },
1525 },
1526 {
1527 .callback = dmi_ignore_irq0_timer_override,
1528 .ident = "FUJITSU SIEMENS",
1529 .matches = {
1530 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1531 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1532 },
1533 },
1534 {}
1535 };
1536
1537 /*
1538 * acpi_boot_table_init() and acpi_boot_init()
1539 * called from setup_arch(), always.
1540 * 1. checksums all tables
1541 * 2. enumerates lapics
1542 * 3. enumerates io-apics
1543 *
1544 * acpi_table_init() is separate to allow reading SRAT without
1545 * other side effects.
1546 *
1547 * side effects of acpi_boot_init:
1548 * acpi_lapic = 1 if LAPIC found
1549 * acpi_ioapic = 1 if IOAPIC found
1550 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1551 * if acpi_blacklisted() acpi_disabled = 1;
1552 * acpi_irq_model=...
1553 * ...
1554 */
1555
1556 void __init acpi_boot_table_init(void)
1557 {
1558 dmi_check_system(acpi_dmi_table);
1559
1560 /*
1561 * If acpi_disabled, bail out
1562 */
1563 if (acpi_disabled)
1564 return;
1565
1566 /*
1567 * Initialize the ACPI boot-time table parser.
1568 */
1569 if (acpi_table_init()) {
1570 disable_acpi();
1571 return;
1572 }
1573
1574 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1575
1576 /*
1577 * blacklist may disable ACPI entirely
1578 */
1579 if (acpi_blacklisted()) {
1580 if (acpi_force) {
1581 printk(KERN_WARNING PREFIX "acpi=force override\n");
1582 } else {
1583 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1584 disable_acpi();
1585 return;
1586 }
1587 }
1588 }
1589
1590 int __init early_acpi_boot_init(void)
1591 {
1592 /*
1593 * If acpi_disabled, bail out
1594 */
1595 if (acpi_disabled)
1596 return 1;
1597
1598 /*
1599 * Process the Multiple APIC Description Table (MADT), if present
1600 */
1601 early_acpi_process_madt();
1602
1603 /*
1604 * Hardware-reduced ACPI mode initialization:
1605 */
1606 acpi_reduced_hw_init();
1607
1608 return 0;
1609 }
1610
1611 int __init acpi_boot_init(void)
1612 {
1613 /* those are executed after early-quirks are executed */
1614 dmi_check_system(acpi_dmi_table_late);
1615
1616 /*
1617 * If acpi_disabled, bail out
1618 */
1619 if (acpi_disabled)
1620 return 1;
1621
1622 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1623
1624 /*
1625 * set sci_int and PM timer address
1626 */
1627 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1628
1629 /*
1630 * Process the Multiple APIC Description Table (MADT), if present
1631 */
1632 acpi_process_madt();
1633
1634 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1635 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1636 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1637
1638 if (!acpi_noirq)
1639 x86_init.pci.init = pci_acpi_init;
1640
1641 /* Do not enable ACPI SPCR console by default */
1642 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1643 return 0;
1644 }
1645
1646 static int __init parse_acpi(char *arg)
1647 {
1648 if (!arg)
1649 return -EINVAL;
1650
1651 /* "acpi=off" disables both ACPI table parsing and interpreter */
1652 if (strcmp(arg, "off") == 0) {
1653 disable_acpi();
1654 }
1655 /* acpi=force to over-ride black-list */
1656 else if (strcmp(arg, "force") == 0) {
1657 acpi_force = 1;
1658 acpi_disabled = 0;
1659 }
1660 /* acpi=strict disables out-of-spec workarounds */
1661 else if (strcmp(arg, "strict") == 0) {
1662 acpi_strict = 1;
1663 }
1664 /* acpi=rsdt use RSDT instead of XSDT */
1665 else if (strcmp(arg, "rsdt") == 0) {
1666 acpi_gbl_do_not_use_xsdt = TRUE;
1667 }
1668 /* "acpi=noirq" disables ACPI interrupt routing */
1669 else if (strcmp(arg, "noirq") == 0) {
1670 acpi_noirq_set();
1671 }
1672 /* "acpi=copy_dsdt" copys DSDT */
1673 else if (strcmp(arg, "copy_dsdt") == 0) {
1674 acpi_gbl_copy_dsdt_locally = 1;
1675 }
1676 /* "acpi=nocmcff" disables FF mode for corrected errors */
1677 else if (strcmp(arg, "nocmcff") == 0) {
1678 acpi_disable_cmcff = 1;
1679 } else {
1680 /* Core will printk when we return error. */
1681 return -EINVAL;
1682 }
1683 return 0;
1684 }
1685 early_param("acpi", parse_acpi);
1686
1687 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1688 static int __init parse_pci(char *arg)
1689 {
1690 if (arg && strcmp(arg, "noacpi") == 0)
1691 acpi_disable_pci();
1692 return 0;
1693 }
1694 early_param("pci", parse_pci);
1695
1696 int __init acpi_mps_check(void)
1697 {
1698 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1699 /* mptable code is not built-in*/
1700 if (acpi_disabled || acpi_noirq) {
1701 printk(KERN_WARNING "MPS support code is not built-in.\n"
1702 "Using acpi=off or acpi=noirq or pci=noacpi "
1703 "may have problem\n");
1704 return 1;
1705 }
1706 #endif
1707 return 0;
1708 }
1709
1710 #ifdef CONFIG_X86_IO_APIC
1711 static int __init parse_acpi_skip_timer_override(char *arg)
1712 {
1713 acpi_skip_timer_override = 1;
1714 return 0;
1715 }
1716 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1717
1718 static int __init parse_acpi_use_timer_override(char *arg)
1719 {
1720 acpi_use_timer_override = 1;
1721 return 0;
1722 }
1723 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1724 #endif /* CONFIG_X86_IO_APIC */
1725
1726 static int __init setup_acpi_sci(char *s)
1727 {
1728 if (!s)
1729 return -EINVAL;
1730 if (!strcmp(s, "edge"))
1731 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1732 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1733 else if (!strcmp(s, "level"))
1734 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1735 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1736 else if (!strcmp(s, "high"))
1737 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1738 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1739 else if (!strcmp(s, "low"))
1740 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1741 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1742 else
1743 return -EINVAL;
1744 return 0;
1745 }
1746 early_param("acpi_sci", setup_acpi_sci);
1747
1748 int __acpi_acquire_global_lock(unsigned int *lock)
1749 {
1750 unsigned int old, new, val;
1751 do {
1752 old = *lock;
1753 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1754 val = cmpxchg(lock, old, new);
1755 } while (unlikely (val != old));
1756 return (new < 3) ? -1 : 0;
1757 }
1758
1759 int __acpi_release_global_lock(unsigned int *lock)
1760 {
1761 unsigned int old, new, val;
1762 do {
1763 old = *lock;
1764 new = old & ~0x3;
1765 val = cmpxchg(lock, old, new);
1766 } while (unlikely (val != old));
1767 return old & 0x1;
1768 }
1769
1770 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1771 {
1772 e820__range_add(addr, size, E820_TYPE_ACPI);
1773 e820__update_table_print();
1774 }
1775
1776 u64 x86_default_get_root_pointer(void)
1777 {
1778 return boot_params.hdr.acpi_rsdp_addr;
1779 }
Linux with added FPC-III support