xref: /openbmc/linux/arch/x86/kernel/acpi/boot.c (revision 82003e04)
1 /*
2  *  boot.c - Architecture-Specific Low-Level ACPI Boot Support
3  *
4  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5  *  Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6  *
7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  *
23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24  */
25 
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/export.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38 
39 #include <asm/irqdomain.h>
40 #include <asm/pci_x86.h>
41 #include <asm/pgtable.h>
42 #include <asm/io_apic.h>
43 #include <asm/apic.h>
44 #include <asm/io.h>
45 #include <asm/mpspec.h>
46 #include <asm/smp.h>
47 #include <asm/i8259.h>
48 
49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50 static int __initdata acpi_force = 0;
51 int acpi_disabled;
52 EXPORT_SYMBOL(acpi_disabled);
53 
54 #ifdef	CONFIG_X86_64
55 # include <asm/proto.h>
56 #endif				/* X86 */
57 
58 #define PREFIX			"ACPI: "
59 
60 int acpi_noirq;				/* skip ACPI IRQ initialization */
61 int acpi_pci_disabled;		/* skip ACPI PCI scan and IRQ initialization */
62 EXPORT_SYMBOL(acpi_pci_disabled);
63 
64 int acpi_lapic;
65 int acpi_ioapic;
66 int acpi_strict;
67 int acpi_disable_cmcff;
68 
69 u8 acpi_sci_flags __initdata;
70 int acpi_sci_override_gsi __initdata;
71 int acpi_skip_timer_override __initdata;
72 int acpi_use_timer_override __initdata;
73 int acpi_fix_pin2_polarity __initdata;
74 
75 #ifdef CONFIG_X86_LOCAL_APIC
76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
77 #endif
78 
79 /*
80  * Locks related to IOAPIC hotplug
81  * Hotplug side:
82  *	->device_hotplug_lock
83  *		->acpi_ioapic_lock
84  *			->ioapic_lock
85  * Interrupt mapping side:
86  *	->acpi_ioapic_lock
87  *		->ioapic_mutex
88  *			->ioapic_lock
89  */
90 static DEFINE_MUTEX(acpi_ioapic_lock);
91 
92 /* --------------------------------------------------------------------------
93                               Boot-time Configuration
94    -------------------------------------------------------------------------- */
95 
96 /*
97  * The default interrupt routing model is PIC (8259).  This gets
98  * overridden if IOAPICs are enumerated (below).
99  */
100 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
101 
102 
103 /*
104  * ISA irqs by default are the first 16 gsis but can be
105  * any gsi as specified by an interrupt source override.
106  */
107 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
108 	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
109 };
110 
111 #define	ACPI_INVALID_GSI		INT_MIN
112 
113 /*
114  * This is just a simple wrapper around early_ioremap(),
115  * with sanity checks for phys == 0 and size == 0.
116  */
117 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
118 {
119 
120 	if (!phys || !size)
121 		return NULL;
122 
123 	return early_ioremap(phys, size);
124 }
125 
126 void __init __acpi_unmap_table(char *map, unsigned long size)
127 {
128 	if (!map || !size)
129 		return;
130 
131 	early_iounmap(map, size);
132 }
133 
134 #ifdef CONFIG_X86_LOCAL_APIC
135 static int __init acpi_parse_madt(struct acpi_table_header *table)
136 {
137 	struct acpi_table_madt *madt = NULL;
138 
139 	if (!boot_cpu_has(X86_FEATURE_APIC))
140 		return -EINVAL;
141 
142 	madt = (struct acpi_table_madt *)table;
143 	if (!madt) {
144 		printk(KERN_WARNING PREFIX "Unable to map MADT\n");
145 		return -ENODEV;
146 	}
147 
148 	if (madt->address) {
149 		acpi_lapic_addr = (u64) madt->address;
150 
151 		printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
152 		       madt->address);
153 	}
154 
155 	default_acpi_madt_oem_check(madt->header.oem_id,
156 				    madt->header.oem_table_id);
157 
158 	return 0;
159 }
160 
161 /**
162  * acpi_register_lapic - register a local apic and generates a logic cpu number
163  * @id: local apic id to register
164  * @acpiid: ACPI id to register
165  * @enabled: this cpu is enabled or not
166  *
167  * Returns the logic cpu number which maps to the local apic
168  */
169 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
170 {
171 	unsigned int ver = 0;
172 	int cpu;
173 
174 	if (id >= MAX_LOCAL_APIC) {
175 		printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
176 		return -EINVAL;
177 	}
178 
179 	if (boot_cpu_physical_apicid != -1U)
180 		ver = boot_cpu_apic_version;
181 
182 	cpu = __generic_processor_info(id, ver, enabled);
183 	if (cpu >= 0)
184 		early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
185 
186 	return cpu;
187 }
188 
189 static int __init
190 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
191 {
192 	struct acpi_madt_local_x2apic *processor = NULL;
193 	int apic_id;
194 	u8 enabled;
195 
196 	processor = (struct acpi_madt_local_x2apic *)header;
197 
198 	if (BAD_MADT_ENTRY(processor, end))
199 		return -EINVAL;
200 
201 	acpi_table_print_madt_entry(header);
202 
203 	apic_id = processor->local_apic_id;
204 	enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
205 #ifdef CONFIG_X86_X2APIC
206 	/*
207 	 * We need to register disabled CPU as well to permit
208 	 * counting disabled CPUs. This allows us to size
209 	 * cpus_possible_map more accurately, to permit
210 	 * to not preallocating memory for all NR_CPUS
211 	 * when we use CPU hotplug.
212 	 */
213 	if (!apic->apic_id_valid(apic_id) && enabled)
214 		printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
215 	else
216 		acpi_register_lapic(apic_id, processor->uid, enabled);
217 #else
218 	printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
219 #endif
220 
221 	return 0;
222 }
223 
224 static int __init
225 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
226 {
227 	struct acpi_madt_local_apic *processor = NULL;
228 
229 	processor = (struct acpi_madt_local_apic *)header;
230 
231 	if (BAD_MADT_ENTRY(processor, end))
232 		return -EINVAL;
233 
234 	acpi_table_print_madt_entry(header);
235 
236 	/* Ignore invalid ID */
237 	if (processor->id == 0xff)
238 		return 0;
239 
240 	/*
241 	 * We need to register disabled CPU as well to permit
242 	 * counting disabled CPUs. This allows us to size
243 	 * cpus_possible_map more accurately, to permit
244 	 * to not preallocating memory for all NR_CPUS
245 	 * when we use CPU hotplug.
246 	 */
247 	acpi_register_lapic(processor->id,	/* APIC ID */
248 			    processor->processor_id, /* ACPI ID */
249 			    processor->lapic_flags & ACPI_MADT_ENABLED);
250 
251 	return 0;
252 }
253 
254 static int __init
255 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
256 {
257 	struct acpi_madt_local_sapic *processor = NULL;
258 
259 	processor = (struct acpi_madt_local_sapic *)header;
260 
261 	if (BAD_MADT_ENTRY(processor, end))
262 		return -EINVAL;
263 
264 	acpi_table_print_madt_entry(header);
265 
266 	acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
267 			    processor->processor_id, /* ACPI ID */
268 			    processor->lapic_flags & ACPI_MADT_ENABLED);
269 
270 	return 0;
271 }
272 
273 static int __init
274 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
275 			  const unsigned long end)
276 {
277 	struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
278 
279 	lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
280 
281 	if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
282 		return -EINVAL;
283 
284 	acpi_table_print_madt_entry(header);
285 
286 	acpi_lapic_addr = lapic_addr_ovr->address;
287 
288 	return 0;
289 }
290 
291 static int __init
292 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
293 		      const unsigned long end)
294 {
295 	struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
296 
297 	x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
298 
299 	if (BAD_MADT_ENTRY(x2apic_nmi, end))
300 		return -EINVAL;
301 
302 	acpi_table_print_madt_entry(header);
303 
304 	if (x2apic_nmi->lint != 1)
305 		printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
306 
307 	return 0;
308 }
309 
310 static int __init
311 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
312 {
313 	struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
314 
315 	lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
316 
317 	if (BAD_MADT_ENTRY(lapic_nmi, end))
318 		return -EINVAL;
319 
320 	acpi_table_print_madt_entry(header);
321 
322 	if (lapic_nmi->lint != 1)
323 		printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
324 
325 	return 0;
326 }
327 
328 #endif				/*CONFIG_X86_LOCAL_APIC */
329 
330 #ifdef CONFIG_X86_IO_APIC
331 #define MP_ISA_BUS		0
332 
333 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
334 					  u32 gsi)
335 {
336 	int ioapic;
337 	int pin;
338 	struct mpc_intsrc mp_irq;
339 
340 	/*
341 	 * Convert 'gsi' to 'ioapic.pin'.
342 	 */
343 	ioapic = mp_find_ioapic(gsi);
344 	if (ioapic < 0)
345 		return;
346 	pin = mp_find_ioapic_pin(ioapic, gsi);
347 
348 	/*
349 	 * TBD: This check is for faulty timer entries, where the override
350 	 *      erroneously sets the trigger to level, resulting in a HUGE
351 	 *      increase of timer interrupts!
352 	 */
353 	if ((bus_irq == 0) && (trigger == 3))
354 		trigger = 1;
355 
356 	mp_irq.type = MP_INTSRC;
357 	mp_irq.irqtype = mp_INT;
358 	mp_irq.irqflag = (trigger << 2) | polarity;
359 	mp_irq.srcbus = MP_ISA_BUS;
360 	mp_irq.srcbusirq = bus_irq;	/* IRQ */
361 	mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
362 	mp_irq.dstirq = pin;	/* INTIN# */
363 
364 	mp_save_irq(&mp_irq);
365 
366 	/*
367 	 * Reset default identity mapping if gsi is also an legacy IRQ,
368 	 * otherwise there will be more than one entry with the same GSI
369 	 * and acpi_isa_irq_to_gsi() may give wrong result.
370 	 */
371 	if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
372 		isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
373 	isa_irq_to_gsi[bus_irq] = gsi;
374 }
375 
376 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
377 			int polarity)
378 {
379 #ifdef CONFIG_X86_MPPARSE
380 	struct mpc_intsrc mp_irq;
381 	struct pci_dev *pdev;
382 	unsigned char number;
383 	unsigned int devfn;
384 	int ioapic;
385 	u8 pin;
386 
387 	if (!acpi_ioapic)
388 		return 0;
389 	if (!dev || !dev_is_pci(dev))
390 		return 0;
391 
392 	pdev = to_pci_dev(dev);
393 	number = pdev->bus->number;
394 	devfn = pdev->devfn;
395 	pin = pdev->pin;
396 	/* print the entry should happen on mptable identically */
397 	mp_irq.type = MP_INTSRC;
398 	mp_irq.irqtype = mp_INT;
399 	mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
400 				(polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
401 	mp_irq.srcbus = number;
402 	mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
403 	ioapic = mp_find_ioapic(gsi);
404 	mp_irq.dstapic = mpc_ioapic_id(ioapic);
405 	mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
406 
407 	mp_save_irq(&mp_irq);
408 #endif
409 	return 0;
410 }
411 
412 static int __init
413 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
414 {
415 	struct acpi_madt_io_apic *ioapic = NULL;
416 	struct ioapic_domain_cfg cfg = {
417 		.type = IOAPIC_DOMAIN_DYNAMIC,
418 		.ops = &mp_ioapic_irqdomain_ops,
419 	};
420 
421 	ioapic = (struct acpi_madt_io_apic *)header;
422 
423 	if (BAD_MADT_ENTRY(ioapic, end))
424 		return -EINVAL;
425 
426 	acpi_table_print_madt_entry(header);
427 
428 	/* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
429 	if (ioapic->global_irq_base < nr_legacy_irqs())
430 		cfg.type = IOAPIC_DOMAIN_LEGACY;
431 
432 	mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
433 			   &cfg);
434 
435 	return 0;
436 }
437 
438 /*
439  * Parse Interrupt Source Override for the ACPI SCI
440  */
441 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
442 {
443 	if (trigger == 0)	/* compatible SCI trigger is level */
444 		trigger = 3;
445 
446 	if (polarity == 0)	/* compatible SCI polarity is low */
447 		polarity = 3;
448 
449 	/* Command-line over-ride via acpi_sci= */
450 	if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
451 		trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
452 
453 	if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
454 		polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
455 
456 	mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
457 	acpi_penalize_sci_irq(bus_irq, trigger, polarity);
458 
459 	/*
460 	 * stash over-ride to indicate we've been here
461 	 * and for later update of acpi_gbl_FADT
462 	 */
463 	acpi_sci_override_gsi = gsi;
464 	return;
465 }
466 
467 static int __init
468 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
469 		       const unsigned long end)
470 {
471 	struct acpi_madt_interrupt_override *intsrc = NULL;
472 
473 	intsrc = (struct acpi_madt_interrupt_override *)header;
474 
475 	if (BAD_MADT_ENTRY(intsrc, end))
476 		return -EINVAL;
477 
478 	acpi_table_print_madt_entry(header);
479 
480 	if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
481 		acpi_sci_ioapic_setup(intsrc->source_irq,
482 				      intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
483 				      (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
484 				      intsrc->global_irq);
485 		return 0;
486 	}
487 
488 	if (intsrc->source_irq == 0) {
489 		if (acpi_skip_timer_override) {
490 			printk(PREFIX "BIOS IRQ0 override ignored.\n");
491 			return 0;
492 		}
493 
494 		if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
495 			&& (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
496 			intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
497 			printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
498 		}
499 	}
500 
501 	mp_override_legacy_irq(intsrc->source_irq,
502 				intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
503 				(intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
504 				intsrc->global_irq);
505 
506 	return 0;
507 }
508 
509 static int __init
510 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
511 {
512 	struct acpi_madt_nmi_source *nmi_src = NULL;
513 
514 	nmi_src = (struct acpi_madt_nmi_source *)header;
515 
516 	if (BAD_MADT_ENTRY(nmi_src, end))
517 		return -EINVAL;
518 
519 	acpi_table_print_madt_entry(header);
520 
521 	/* TBD: Support nimsrc entries? */
522 
523 	return 0;
524 }
525 
526 #endif				/* CONFIG_X86_IO_APIC */
527 
528 /*
529  * acpi_pic_sci_set_trigger()
530  *
531  * use ELCR to set PIC-mode trigger type for SCI
532  *
533  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
534  * it may require Edge Trigger -- use "acpi_sci=edge"
535  *
536  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
537  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
538  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
539  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
540  */
541 
542 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
543 {
544 	unsigned int mask = 1 << irq;
545 	unsigned int old, new;
546 
547 	/* Real old ELCR mask */
548 	old = inb(0x4d0) | (inb(0x4d1) << 8);
549 
550 	/*
551 	 * If we use ACPI to set PCI IRQs, then we should clear ELCR
552 	 * since we will set it correctly as we enable the PCI irq
553 	 * routing.
554 	 */
555 	new = acpi_noirq ? old : 0;
556 
557 	/*
558 	 * Update SCI information in the ELCR, it isn't in the PCI
559 	 * routing tables..
560 	 */
561 	switch (trigger) {
562 	case 1:		/* Edge - clear */
563 		new &= ~mask;
564 		break;
565 	case 3:		/* Level - set */
566 		new |= mask;
567 		break;
568 	}
569 
570 	if (old == new)
571 		return;
572 
573 	printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
574 	outb(new, 0x4d0);
575 	outb(new >> 8, 0x4d1);
576 }
577 
578 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
579 {
580 	int rc, irq, trigger, polarity;
581 
582 	if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
583 		*irqp = gsi;
584 		return 0;
585 	}
586 
587 	rc = acpi_get_override_irq(gsi, &trigger, &polarity);
588 	if (rc == 0) {
589 		trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
590 		polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
591 		irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
592 		if (irq >= 0) {
593 			*irqp = irq;
594 			return 0;
595 		}
596 	}
597 
598 	return -1;
599 }
600 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
601 
602 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
603 {
604 	if (isa_irq < nr_legacy_irqs() &&
605 	    isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
606 		*gsi = isa_irq_to_gsi[isa_irq];
607 		return 0;
608 	}
609 
610 	return -1;
611 }
612 
613 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
614 				 int trigger, int polarity)
615 {
616 #ifdef CONFIG_PCI
617 	/*
618 	 * Make sure all (legacy) PCI IRQs are set as level-triggered.
619 	 */
620 	if (trigger == ACPI_LEVEL_SENSITIVE)
621 		elcr_set_level_irq(gsi);
622 #endif
623 
624 	return gsi;
625 }
626 
627 #ifdef CONFIG_X86_LOCAL_APIC
628 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
629 				    int trigger, int polarity)
630 {
631 	int irq = gsi;
632 #ifdef CONFIG_X86_IO_APIC
633 	int node;
634 	struct irq_alloc_info info;
635 
636 	node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
637 	trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
638 	polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
639 	ioapic_set_alloc_attr(&info, node, trigger, polarity);
640 
641 	mutex_lock(&acpi_ioapic_lock);
642 	irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
643 	/* Don't set up the ACPI SCI because it's already set up */
644 	if (irq >= 0 && enable_update_mptable &&
645 	    acpi_gbl_FADT.sci_interrupt != gsi)
646 		mp_config_acpi_gsi(dev, gsi, trigger, polarity);
647 	mutex_unlock(&acpi_ioapic_lock);
648 #endif
649 
650 	return irq;
651 }
652 
653 static void acpi_unregister_gsi_ioapic(u32 gsi)
654 {
655 #ifdef CONFIG_X86_IO_APIC
656 	int irq;
657 
658 	mutex_lock(&acpi_ioapic_lock);
659 	irq = mp_map_gsi_to_irq(gsi, 0, NULL);
660 	if (irq > 0)
661 		mp_unmap_irq(irq);
662 	mutex_unlock(&acpi_ioapic_lock);
663 #endif
664 }
665 #endif
666 
667 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
668 			   int trigger, int polarity) = acpi_register_gsi_pic;
669 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
670 
671 #ifdef CONFIG_ACPI_SLEEP
672 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
673 #else
674 int (*acpi_suspend_lowlevel)(void);
675 #endif
676 
677 /*
678  * success: return IRQ number (>=0)
679  * failure: return < 0
680  */
681 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
682 {
683 	return __acpi_register_gsi(dev, gsi, trigger, polarity);
684 }
685 EXPORT_SYMBOL_GPL(acpi_register_gsi);
686 
687 void acpi_unregister_gsi(u32 gsi)
688 {
689 	if (__acpi_unregister_gsi)
690 		__acpi_unregister_gsi(gsi);
691 }
692 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
693 
694 #ifdef CONFIG_X86_LOCAL_APIC
695 static void __init acpi_set_irq_model_ioapic(void)
696 {
697 	acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
698 	__acpi_register_gsi = acpi_register_gsi_ioapic;
699 	__acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
700 	acpi_ioapic = 1;
701 }
702 #endif
703 
704 /*
705  *  ACPI based hotplug support for CPU
706  */
707 #ifdef CONFIG_ACPI_HOTPLUG_CPU
708 #include <acpi/processor.h>
709 
710 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
711 {
712 #ifdef CONFIG_ACPI_NUMA
713 	int nid;
714 
715 	nid = acpi_get_node(handle);
716 	if (nid != -1) {
717 		set_apicid_to_node(physid, nid);
718 		numa_set_node(cpu, nid);
719 	}
720 #endif
721 	return 0;
722 }
723 
724 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
725 {
726 	int cpu;
727 
728 	cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
729 	if (cpu < 0) {
730 		pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
731 		return cpu;
732 	}
733 
734 	acpi_processor_set_pdc(handle);
735 	acpi_map_cpu2node(handle, cpu, physid);
736 
737 	*pcpu = cpu;
738 	return 0;
739 }
740 EXPORT_SYMBOL(acpi_map_cpu);
741 
742 int acpi_unmap_cpu(int cpu)
743 {
744 #ifdef CONFIG_ACPI_NUMA
745 	set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
746 #endif
747 
748 	per_cpu(x86_cpu_to_apicid, cpu) = -1;
749 	set_cpu_present(cpu, false);
750 	num_processors--;
751 
752 	return (0);
753 }
754 EXPORT_SYMBOL(acpi_unmap_cpu);
755 #endif				/* CONFIG_ACPI_HOTPLUG_CPU */
756 
757 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
758 {
759 	int ret = -ENOSYS;
760 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
761 	int ioapic_id;
762 	u64 addr;
763 	struct ioapic_domain_cfg cfg = {
764 		.type = IOAPIC_DOMAIN_DYNAMIC,
765 		.ops = &mp_ioapic_irqdomain_ops,
766 	};
767 
768 	ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
769 	if (ioapic_id < 0) {
770 		unsigned long long uid;
771 		acpi_status status;
772 
773 		status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
774 					       NULL, &uid);
775 		if (ACPI_FAILURE(status)) {
776 			acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
777 			return -EINVAL;
778 		}
779 		ioapic_id = (int)uid;
780 	}
781 
782 	mutex_lock(&acpi_ioapic_lock);
783 	ret  = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
784 	mutex_unlock(&acpi_ioapic_lock);
785 #endif
786 
787 	return ret;
788 }
789 EXPORT_SYMBOL(acpi_register_ioapic);
790 
791 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
792 {
793 	int ret = -ENOSYS;
794 
795 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
796 	mutex_lock(&acpi_ioapic_lock);
797 	ret  = mp_unregister_ioapic(gsi_base);
798 	mutex_unlock(&acpi_ioapic_lock);
799 #endif
800 
801 	return ret;
802 }
803 EXPORT_SYMBOL(acpi_unregister_ioapic);
804 
805 /**
806  * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
807  *			    has been registered
808  * @handle:	ACPI handle of the IOAPIC deivce
809  * @gsi_base:	GSI base associated with the IOAPIC
810  *
811  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
812  * with acpi_register_ioapic()/acpi_unregister_ioapic().
813  */
814 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
815 {
816 	int ret = 0;
817 
818 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
819 	mutex_lock(&acpi_ioapic_lock);
820 	ret  = mp_ioapic_registered(gsi_base);
821 	mutex_unlock(&acpi_ioapic_lock);
822 #endif
823 
824 	return ret;
825 }
826 
827 static int __init acpi_parse_sbf(struct acpi_table_header *table)
828 {
829 	struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
830 
831 	sbf_port = sb->cmos_index;	/* Save CMOS port */
832 
833 	return 0;
834 }
835 
836 #ifdef CONFIG_HPET_TIMER
837 #include <asm/hpet.h>
838 
839 static struct resource *hpet_res __initdata;
840 
841 static int __init acpi_parse_hpet(struct acpi_table_header *table)
842 {
843 	struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
844 
845 	if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
846 		printk(KERN_WARNING PREFIX "HPET timers must be located in "
847 		       "memory.\n");
848 		return -1;
849 	}
850 
851 	hpet_address = hpet_tbl->address.address;
852 	hpet_blockid = hpet_tbl->sequence;
853 
854 	/*
855 	 * Some broken BIOSes advertise HPET at 0x0. We really do not
856 	 * want to allocate a resource there.
857 	 */
858 	if (!hpet_address) {
859 		printk(KERN_WARNING PREFIX
860 		       "HPET id: %#x base: %#lx is invalid\n",
861 		       hpet_tbl->id, hpet_address);
862 		return 0;
863 	}
864 #ifdef CONFIG_X86_64
865 	/*
866 	 * Some even more broken BIOSes advertise HPET at
867 	 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
868 	 * some noise:
869 	 */
870 	if (hpet_address == 0xfed0000000000000UL) {
871 		if (!hpet_force_user) {
872 			printk(KERN_WARNING PREFIX "HPET id: %#x "
873 			       "base: 0xfed0000000000000 is bogus\n "
874 			       "try hpet=force on the kernel command line to "
875 			       "fix it up to 0xfed00000.\n", hpet_tbl->id);
876 			hpet_address = 0;
877 			return 0;
878 		}
879 		printk(KERN_WARNING PREFIX
880 		       "HPET id: %#x base: 0xfed0000000000000 fixed up "
881 		       "to 0xfed00000.\n", hpet_tbl->id);
882 		hpet_address >>= 32;
883 	}
884 #endif
885 	printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
886 	       hpet_tbl->id, hpet_address);
887 
888 	/*
889 	 * Allocate and initialize the HPET firmware resource for adding into
890 	 * the resource tree during the lateinit timeframe.
891 	 */
892 #define HPET_RESOURCE_NAME_SIZE 9
893 	hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
894 
895 	hpet_res->name = (void *)&hpet_res[1];
896 	hpet_res->flags = IORESOURCE_MEM;
897 	snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
898 		 hpet_tbl->sequence);
899 
900 	hpet_res->start = hpet_address;
901 	hpet_res->end = hpet_address + (1 * 1024) - 1;
902 
903 	return 0;
904 }
905 
906 /*
907  * hpet_insert_resource inserts the HPET resources used into the resource
908  * tree.
909  */
910 static __init int hpet_insert_resource(void)
911 {
912 	if (!hpet_res)
913 		return 1;
914 
915 	return insert_resource(&iomem_resource, hpet_res);
916 }
917 
918 late_initcall(hpet_insert_resource);
919 
920 #else
921 #define	acpi_parse_hpet	NULL
922 #endif
923 
924 static int __init acpi_parse_fadt(struct acpi_table_header *table)
925 {
926 	if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
927 		pr_debug("ACPI: no legacy devices present\n");
928 		x86_platform.legacy.devices.pnpbios = 0;
929 	}
930 
931 	if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
932 		pr_debug("ACPI: not registering RTC platform device\n");
933 		x86_platform.legacy.rtc = 0;
934 	}
935 
936 #ifdef CONFIG_X86_PM_TIMER
937 	/* detect the location of the ACPI PM Timer */
938 	if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
939 		/* FADT rev. 2 */
940 		if (acpi_gbl_FADT.xpm_timer_block.space_id !=
941 		    ACPI_ADR_SPACE_SYSTEM_IO)
942 			return 0;
943 
944 		pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
945 		/*
946 		 * "X" fields are optional extensions to the original V1.0
947 		 * fields, so we must selectively expand V1.0 fields if the
948 		 * corresponding X field is zero.
949 	 	 */
950 		if (!pmtmr_ioport)
951 			pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
952 	} else {
953 		/* FADT rev. 1 */
954 		pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
955 	}
956 	if (pmtmr_ioport)
957 		printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
958 		       pmtmr_ioport);
959 #endif
960 	return 0;
961 }
962 
963 #ifdef	CONFIG_X86_LOCAL_APIC
964 /*
965  * Parse LAPIC entries in MADT
966  * returns 0 on success, < 0 on error
967  */
968 
969 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
970 {
971 	int count;
972 
973 	if (!boot_cpu_has(X86_FEATURE_APIC))
974 		return -ENODEV;
975 
976 	/*
977 	 * Note that the LAPIC address is obtained from the MADT (32-bit value)
978 	 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
979 	 */
980 
981 	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
982 				      acpi_parse_lapic_addr_ovr, 0);
983 	if (count < 0) {
984 		printk(KERN_ERR PREFIX
985 		       "Error parsing LAPIC address override entry\n");
986 		return count;
987 	}
988 
989 	register_lapic_address(acpi_lapic_addr);
990 
991 	return count;
992 }
993 
994 static int __init acpi_parse_madt_lapic_entries(void)
995 {
996 	int count;
997 	int x2count = 0;
998 	int ret;
999 	struct acpi_subtable_proc madt_proc[2];
1000 
1001 	if (!boot_cpu_has(X86_FEATURE_APIC))
1002 		return -ENODEV;
1003 
1004 	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1005 				      acpi_parse_sapic, MAX_LOCAL_APIC);
1006 
1007 	if (!count) {
1008 		memset(madt_proc, 0, sizeof(madt_proc));
1009 		madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1010 		madt_proc[0].handler = acpi_parse_lapic;
1011 		madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1012 		madt_proc[1].handler = acpi_parse_x2apic;
1013 		ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1014 				sizeof(struct acpi_table_madt),
1015 				madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1016 		if (ret < 0) {
1017 			printk(KERN_ERR PREFIX
1018 					"Error parsing LAPIC/X2APIC entries\n");
1019 			return ret;
1020 		}
1021 
1022 		count = madt_proc[0].count;
1023 		x2count = madt_proc[1].count;
1024 	}
1025 	if (!count && !x2count) {
1026 		printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1027 		/* TBD: Cleanup to allow fallback to MPS */
1028 		return -ENODEV;
1029 	} else if (count < 0 || x2count < 0) {
1030 		printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1031 		/* TBD: Cleanup to allow fallback to MPS */
1032 		return count;
1033 	}
1034 
1035 	x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1036 					acpi_parse_x2apic_nmi, 0);
1037 	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1038 				      acpi_parse_lapic_nmi, 0);
1039 	if (count < 0 || x2count < 0) {
1040 		printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1041 		/* TBD: Cleanup to allow fallback to MPS */
1042 		return count;
1043 	}
1044 	return 0;
1045 }
1046 #endif				/* CONFIG_X86_LOCAL_APIC */
1047 
1048 #ifdef	CONFIG_X86_IO_APIC
1049 static void __init mp_config_acpi_legacy_irqs(void)
1050 {
1051 	int i;
1052 	struct mpc_intsrc mp_irq;
1053 
1054 #ifdef CONFIG_EISA
1055 	/*
1056 	 * Fabricate the legacy ISA bus (bus #31).
1057 	 */
1058 	mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1059 #endif
1060 	set_bit(MP_ISA_BUS, mp_bus_not_pci);
1061 	pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1062 
1063 	/*
1064 	 * Use the default configuration for the IRQs 0-15.  Unless
1065 	 * overridden by (MADT) interrupt source override entries.
1066 	 */
1067 	for (i = 0; i < nr_legacy_irqs(); i++) {
1068 		int ioapic, pin;
1069 		unsigned int dstapic;
1070 		int idx;
1071 		u32 gsi;
1072 
1073 		/* Locate the gsi that irq i maps to. */
1074 		if (acpi_isa_irq_to_gsi(i, &gsi))
1075 			continue;
1076 
1077 		/*
1078 		 * Locate the IOAPIC that manages the ISA IRQ.
1079 		 */
1080 		ioapic = mp_find_ioapic(gsi);
1081 		if (ioapic < 0)
1082 			continue;
1083 		pin = mp_find_ioapic_pin(ioapic, gsi);
1084 		dstapic = mpc_ioapic_id(ioapic);
1085 
1086 		for (idx = 0; idx < mp_irq_entries; idx++) {
1087 			struct mpc_intsrc *irq = mp_irqs + idx;
1088 
1089 			/* Do we already have a mapping for this ISA IRQ? */
1090 			if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1091 				break;
1092 
1093 			/* Do we already have a mapping for this IOAPIC pin */
1094 			if (irq->dstapic == dstapic && irq->dstirq == pin)
1095 				break;
1096 		}
1097 
1098 		if (idx != mp_irq_entries) {
1099 			printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1100 			continue;	/* IRQ already used */
1101 		}
1102 
1103 		mp_irq.type = MP_INTSRC;
1104 		mp_irq.irqflag = 0;	/* Conforming */
1105 		mp_irq.srcbus = MP_ISA_BUS;
1106 		mp_irq.dstapic = dstapic;
1107 		mp_irq.irqtype = mp_INT;
1108 		mp_irq.srcbusirq = i; /* Identity mapped */
1109 		mp_irq.dstirq = pin;
1110 
1111 		mp_save_irq(&mp_irq);
1112 	}
1113 }
1114 
1115 /*
1116  * Parse IOAPIC related entries in MADT
1117  * returns 0 on success, < 0 on error
1118  */
1119 static int __init acpi_parse_madt_ioapic_entries(void)
1120 {
1121 	int count;
1122 
1123 	/*
1124 	 * ACPI interpreter is required to complete interrupt setup,
1125 	 * so if it is off, don't enumerate the io-apics with ACPI.
1126 	 * If MPS is present, it will handle them,
1127 	 * otherwise the system will stay in PIC mode
1128 	 */
1129 	if (acpi_disabled || acpi_noirq)
1130 		return -ENODEV;
1131 
1132 	if (!boot_cpu_has(X86_FEATURE_APIC))
1133 		return -ENODEV;
1134 
1135 	/*
1136 	 * if "noapic" boot option, don't look for IO-APICs
1137 	 */
1138 	if (skip_ioapic_setup) {
1139 		printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1140 		       "due to 'noapic' option.\n");
1141 		return -ENODEV;
1142 	}
1143 
1144 	count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1145 				      MAX_IO_APICS);
1146 	if (!count) {
1147 		printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1148 		return -ENODEV;
1149 	} else if (count < 0) {
1150 		printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1151 		return count;
1152 	}
1153 
1154 	count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1155 				      acpi_parse_int_src_ovr, nr_irqs);
1156 	if (count < 0) {
1157 		printk(KERN_ERR PREFIX
1158 		       "Error parsing interrupt source overrides entry\n");
1159 		/* TBD: Cleanup to allow fallback to MPS */
1160 		return count;
1161 	}
1162 
1163 	/*
1164 	 * If BIOS did not supply an INT_SRC_OVR for the SCI
1165 	 * pretend we got one so we can set the SCI flags.
1166 	 */
1167 	if (!acpi_sci_override_gsi)
1168 		acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1169 				      acpi_gbl_FADT.sci_interrupt);
1170 
1171 	/* Fill in identity legacy mappings where no override */
1172 	mp_config_acpi_legacy_irqs();
1173 
1174 	count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1175 				      acpi_parse_nmi_src, nr_irqs);
1176 	if (count < 0) {
1177 		printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1178 		/* TBD: Cleanup to allow fallback to MPS */
1179 		return count;
1180 	}
1181 
1182 	return 0;
1183 }
1184 #else
1185 static inline int acpi_parse_madt_ioapic_entries(void)
1186 {
1187 	return -1;
1188 }
1189 #endif	/* !CONFIG_X86_IO_APIC */
1190 
1191 static void __init early_acpi_process_madt(void)
1192 {
1193 #ifdef CONFIG_X86_LOCAL_APIC
1194 	int error;
1195 
1196 	if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1197 
1198 		/*
1199 		 * Parse MADT LAPIC entries
1200 		 */
1201 		error = early_acpi_parse_madt_lapic_addr_ovr();
1202 		if (!error) {
1203 			acpi_lapic = 1;
1204 			smp_found_config = 1;
1205 		}
1206 		if (error == -EINVAL) {
1207 			/*
1208 			 * Dell Precision Workstation 410, 610 come here.
1209 			 */
1210 			printk(KERN_ERR PREFIX
1211 			       "Invalid BIOS MADT, disabling ACPI\n");
1212 			disable_acpi();
1213 		}
1214 	}
1215 #endif
1216 }
1217 
1218 static void __init acpi_process_madt(void)
1219 {
1220 #ifdef CONFIG_X86_LOCAL_APIC
1221 	int error;
1222 
1223 	if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1224 
1225 		/*
1226 		 * Parse MADT LAPIC entries
1227 		 */
1228 		error = acpi_parse_madt_lapic_entries();
1229 		if (!error) {
1230 			acpi_lapic = 1;
1231 
1232 			/*
1233 			 * Parse MADT IO-APIC entries
1234 			 */
1235 			mutex_lock(&acpi_ioapic_lock);
1236 			error = acpi_parse_madt_ioapic_entries();
1237 			mutex_unlock(&acpi_ioapic_lock);
1238 			if (!error) {
1239 				acpi_set_irq_model_ioapic();
1240 
1241 				smp_found_config = 1;
1242 			}
1243 		}
1244 		if (error == -EINVAL) {
1245 			/*
1246 			 * Dell Precision Workstation 410, 610 come here.
1247 			 */
1248 			printk(KERN_ERR PREFIX
1249 			       "Invalid BIOS MADT, disabling ACPI\n");
1250 			disable_acpi();
1251 		}
1252 	} else {
1253 		/*
1254  		 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1255  		 * In the event an MPS table was found, forget it.
1256  		 * Boot with "acpi=off" to use MPS on such a system.
1257  		 */
1258 		if (smp_found_config) {
1259 			printk(KERN_WARNING PREFIX
1260 				"No APIC-table, disabling MPS\n");
1261 			smp_found_config = 0;
1262 		}
1263 	}
1264 
1265 	/*
1266 	 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1267 	 * processors, where MPS only supports physical.
1268 	 */
1269 	if (acpi_lapic && acpi_ioapic)
1270 		printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1271 		       "information\n");
1272 	else if (acpi_lapic)
1273 		printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1274 		       "configuration information\n");
1275 #endif
1276 	return;
1277 }
1278 
1279 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1280 {
1281 	if (!acpi_force) {
1282 		printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1283 		       d->ident);
1284 		acpi_noirq_set();
1285 	}
1286 	return 0;
1287 }
1288 
1289 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1290 {
1291 	if (!acpi_force) {
1292 		printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1293 		       d->ident);
1294 		acpi_disable_pci();
1295 	}
1296 	return 0;
1297 }
1298 
1299 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1300 {
1301 	if (!acpi_force) {
1302 		printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1303 		disable_acpi();
1304 	} else {
1305 		printk(KERN_NOTICE
1306 		       "Warning: DMI blacklist says broken, but acpi forced\n");
1307 	}
1308 	return 0;
1309 }
1310 
1311 /*
1312  * Force ignoring BIOS IRQ0 override
1313  */
1314 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1315 {
1316 	if (!acpi_skip_timer_override) {
1317 		pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1318 			d->ident);
1319 		acpi_skip_timer_override = 1;
1320 	}
1321 	return 0;
1322 }
1323 
1324 /*
1325  * ACPI offers an alternative platform interface model that removes
1326  * ACPI hardware requirements for platforms that do not implement
1327  * the PC Architecture.
1328  *
1329  * We initialize the Hardware-reduced ACPI model here:
1330  */
1331 static void __init acpi_reduced_hw_init(void)
1332 {
1333 	if (acpi_gbl_reduced_hardware) {
1334 		/*
1335 		 * Override x86_init functions and bypass legacy pic
1336 		 * in Hardware-reduced ACPI mode
1337 		 */
1338 		x86_init.timers.timer_init	= x86_init_noop;
1339 		x86_init.irqs.pre_vector_init	= x86_init_noop;
1340 		legacy_pic			= &null_legacy_pic;
1341 	}
1342 }
1343 
1344 /*
1345  * If your system is blacklisted here, but you find that acpi=force
1346  * works for you, please contact linux-acpi@vger.kernel.org
1347  */
1348 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1349 	/*
1350 	 * Boxes that need ACPI disabled
1351 	 */
1352 	{
1353 	 .callback = dmi_disable_acpi,
1354 	 .ident = "IBM Thinkpad",
1355 	 .matches = {
1356 		     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1357 		     DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1358 		     },
1359 	 },
1360 
1361 	/*
1362 	 * Boxes that need ACPI PCI IRQ routing disabled
1363 	 */
1364 	{
1365 	 .callback = disable_acpi_irq,
1366 	 .ident = "ASUS A7V",
1367 	 .matches = {
1368 		     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1369 		     DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1370 		     /* newer BIOS, Revision 1011, does work */
1371 		     DMI_MATCH(DMI_BIOS_VERSION,
1372 			       "ASUS A7V ACPI BIOS Revision 1007"),
1373 		     },
1374 	 },
1375 	{
1376 		/*
1377 		 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1378 		 * for LPC bridge, which is needed for the PCI
1379 		 * interrupt links to work. DSDT fix is in bug 5966.
1380 		 * 2645, 2646 model numbers are shared with 600/600E/600X
1381 		 */
1382 	 .callback = disable_acpi_irq,
1383 	 .ident = "IBM Thinkpad 600 Series 2645",
1384 	 .matches = {
1385 		     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1386 		     DMI_MATCH(DMI_BOARD_NAME, "2645"),
1387 		     },
1388 	 },
1389 	{
1390 	 .callback = disable_acpi_irq,
1391 	 .ident = "IBM Thinkpad 600 Series 2646",
1392 	 .matches = {
1393 		     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1394 		     DMI_MATCH(DMI_BOARD_NAME, "2646"),
1395 		     },
1396 	 },
1397 	/*
1398 	 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1399 	 */
1400 	{			/* _BBN 0 bug */
1401 	 .callback = disable_acpi_pci,
1402 	 .ident = "ASUS PR-DLS",
1403 	 .matches = {
1404 		     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1405 		     DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1406 		     DMI_MATCH(DMI_BIOS_VERSION,
1407 			       "ASUS PR-DLS ACPI BIOS Revision 1010"),
1408 		     DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1409 		     },
1410 	 },
1411 	{
1412 	 .callback = disable_acpi_pci,
1413 	 .ident = "Acer TravelMate 36x Laptop",
1414 	 .matches = {
1415 		     DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1416 		     DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1417 		     },
1418 	 },
1419 	{}
1420 };
1421 
1422 /* second table for DMI checks that should run after early-quirks */
1423 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1424 	/*
1425 	 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1426 	 * which includes some code which overrides all temperature
1427 	 * trip points to 16C if the INTIN2 input of the I/O APIC
1428 	 * is enabled.  This input is incorrectly designated the
1429 	 * ISA IRQ 0 via an interrupt source override even though
1430 	 * it is wired to the output of the master 8259A and INTIN0
1431 	 * is not connected at all.  Force ignoring BIOS IRQ0
1432 	 * override in that cases.
1433 	 */
1434 	{
1435 	 .callback = dmi_ignore_irq0_timer_override,
1436 	 .ident = "HP nx6115 laptop",
1437 	 .matches = {
1438 		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1439 		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1440 		     },
1441 	 },
1442 	{
1443 	 .callback = dmi_ignore_irq0_timer_override,
1444 	 .ident = "HP NX6125 laptop",
1445 	 .matches = {
1446 		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1447 		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1448 		     },
1449 	 },
1450 	{
1451 	 .callback = dmi_ignore_irq0_timer_override,
1452 	 .ident = "HP NX6325 laptop",
1453 	 .matches = {
1454 		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1455 		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1456 		     },
1457 	 },
1458 	{
1459 	 .callback = dmi_ignore_irq0_timer_override,
1460 	 .ident = "HP 6715b laptop",
1461 	 .matches = {
1462 		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1463 		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1464 		     },
1465 	 },
1466 	{
1467 	 .callback = dmi_ignore_irq0_timer_override,
1468 	 .ident = "FUJITSU SIEMENS",
1469 	 .matches = {
1470 		     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1471 		     DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1472 		     },
1473 	 },
1474 	{}
1475 };
1476 
1477 /*
1478  * acpi_boot_table_init() and acpi_boot_init()
1479  *  called from setup_arch(), always.
1480  *	1. checksums all tables
1481  *	2. enumerates lapics
1482  *	3. enumerates io-apics
1483  *
1484  * acpi_table_init() is separate to allow reading SRAT without
1485  * other side effects.
1486  *
1487  * side effects of acpi_boot_init:
1488  *	acpi_lapic = 1 if LAPIC found
1489  *	acpi_ioapic = 1 if IOAPIC found
1490  *	if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1491  *	if acpi_blacklisted() acpi_disabled = 1;
1492  *	acpi_irq_model=...
1493  *	...
1494  */
1495 
1496 void __init acpi_boot_table_init(void)
1497 {
1498 	dmi_check_system(acpi_dmi_table);
1499 
1500 	/*
1501 	 * If acpi_disabled, bail out
1502 	 */
1503 	if (acpi_disabled)
1504 		return;
1505 
1506 	/*
1507 	 * Initialize the ACPI boot-time table parser.
1508 	 */
1509 	if (acpi_table_init()) {
1510 		disable_acpi();
1511 		return;
1512 	}
1513 
1514 	acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1515 
1516 	/*
1517 	 * blacklist may disable ACPI entirely
1518 	 */
1519 	if (acpi_blacklisted()) {
1520 		if (acpi_force) {
1521 			printk(KERN_WARNING PREFIX "acpi=force override\n");
1522 		} else {
1523 			printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1524 			disable_acpi();
1525 			return;
1526 		}
1527 	}
1528 }
1529 
1530 int __init early_acpi_boot_init(void)
1531 {
1532 	/*
1533 	 * If acpi_disabled, bail out
1534 	 */
1535 	if (acpi_disabled)
1536 		return 1;
1537 
1538 	/*
1539 	 * Process the Multiple APIC Description Table (MADT), if present
1540 	 */
1541 	early_acpi_process_madt();
1542 
1543 	/*
1544 	 * Hardware-reduced ACPI mode initialization:
1545 	 */
1546 	acpi_reduced_hw_init();
1547 
1548 	return 0;
1549 }
1550 
1551 int __init acpi_boot_init(void)
1552 {
1553 	/* those are executed after early-quirks are executed */
1554 	dmi_check_system(acpi_dmi_table_late);
1555 
1556 	/*
1557 	 * If acpi_disabled, bail out
1558 	 */
1559 	if (acpi_disabled)
1560 		return 1;
1561 
1562 	acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1563 
1564 	/*
1565 	 * set sci_int and PM timer address
1566 	 */
1567 	acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1568 
1569 	/*
1570 	 * Process the Multiple APIC Description Table (MADT), if present
1571 	 */
1572 	acpi_process_madt();
1573 
1574 	acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1575 
1576 	if (!acpi_noirq)
1577 		x86_init.pci.init = pci_acpi_init;
1578 
1579 	return 0;
1580 }
1581 
1582 static int __init parse_acpi(char *arg)
1583 {
1584 	if (!arg)
1585 		return -EINVAL;
1586 
1587 	/* "acpi=off" disables both ACPI table parsing and interpreter */
1588 	if (strcmp(arg, "off") == 0) {
1589 		disable_acpi();
1590 	}
1591 	/* acpi=force to over-ride black-list */
1592 	else if (strcmp(arg, "force") == 0) {
1593 		acpi_force = 1;
1594 		acpi_disabled = 0;
1595 	}
1596 	/* acpi=strict disables out-of-spec workarounds */
1597 	else if (strcmp(arg, "strict") == 0) {
1598 		acpi_strict = 1;
1599 	}
1600 	/* acpi=rsdt use RSDT instead of XSDT */
1601 	else if (strcmp(arg, "rsdt") == 0) {
1602 		acpi_gbl_do_not_use_xsdt = TRUE;
1603 	}
1604 	/* "acpi=noirq" disables ACPI interrupt routing */
1605 	else if (strcmp(arg, "noirq") == 0) {
1606 		acpi_noirq_set();
1607 	}
1608 	/* "acpi=copy_dsdt" copys DSDT */
1609 	else if (strcmp(arg, "copy_dsdt") == 0) {
1610 		acpi_gbl_copy_dsdt_locally = 1;
1611 	}
1612 	/* "acpi=nocmcff" disables FF mode for corrected errors */
1613 	else if (strcmp(arg, "nocmcff") == 0) {
1614 		acpi_disable_cmcff = 1;
1615 	} else {
1616 		/* Core will printk when we return error. */
1617 		return -EINVAL;
1618 	}
1619 	return 0;
1620 }
1621 early_param("acpi", parse_acpi);
1622 
1623 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1624 static int __init parse_pci(char *arg)
1625 {
1626 	if (arg && strcmp(arg, "noacpi") == 0)
1627 		acpi_disable_pci();
1628 	return 0;
1629 }
1630 early_param("pci", parse_pci);
1631 
1632 int __init acpi_mps_check(void)
1633 {
1634 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1635 /* mptable code is not built-in*/
1636 	if (acpi_disabled || acpi_noirq) {
1637 		printk(KERN_WARNING "MPS support code is not built-in.\n"
1638 		       "Using acpi=off or acpi=noirq or pci=noacpi "
1639 		       "may have problem\n");
1640 		return 1;
1641 	}
1642 #endif
1643 	return 0;
1644 }
1645 
1646 #ifdef CONFIG_X86_IO_APIC
1647 static int __init parse_acpi_skip_timer_override(char *arg)
1648 {
1649 	acpi_skip_timer_override = 1;
1650 	return 0;
1651 }
1652 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1653 
1654 static int __init parse_acpi_use_timer_override(char *arg)
1655 {
1656 	acpi_use_timer_override = 1;
1657 	return 0;
1658 }
1659 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1660 #endif /* CONFIG_X86_IO_APIC */
1661 
1662 static int __init setup_acpi_sci(char *s)
1663 {
1664 	if (!s)
1665 		return -EINVAL;
1666 	if (!strcmp(s, "edge"))
1667 		acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1668 			(acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1669 	else if (!strcmp(s, "level"))
1670 		acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1671 			(acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1672 	else if (!strcmp(s, "high"))
1673 		acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1674 			(acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1675 	else if (!strcmp(s, "low"))
1676 		acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1677 			(acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1678 	else
1679 		return -EINVAL;
1680 	return 0;
1681 }
1682 early_param("acpi_sci", setup_acpi_sci);
1683 
1684 int __acpi_acquire_global_lock(unsigned int *lock)
1685 {
1686 	unsigned int old, new, val;
1687 	do {
1688 		old = *lock;
1689 		new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1690 		val = cmpxchg(lock, old, new);
1691 	} while (unlikely (val != old));
1692 	return (new < 3) ? -1 : 0;
1693 }
1694 
1695 int __acpi_release_global_lock(unsigned int *lock)
1696 {
1697 	unsigned int old, new, val;
1698 	do {
1699 		old = *lock;
1700 		new = old & ~0x3;
1701 		val = cmpxchg(lock, old, new);
1702 	} while (unlikely (val != old));
1703 	return old & 0x1;
1704 }
1705 
1706 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1707 {
1708 	e820_add_region(addr, size, E820_ACPI);
1709 	update_e820();
1710 }
1711