xref: /linux/arch/x86/kernel/acpi/boot.c (revision 4413e16d9d21673bb5048a2e542f1aaa00015c2e)
1 /*
2  *  boot.c - Architecture-Specific Low-Level ACPI Boot Support
3  *
4  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5  *  Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6  *
7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  *
23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24  */
25 
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38 
39 #include <asm/pci_x86.h>
40 #include <asm/pgtable.h>
41 #include <asm/io_apic.h>
42 #include <asm/apic.h>
43 #include <asm/io.h>
44 #include <asm/mpspec.h>
45 #include <asm/smp.h>
46 
47 static int __initdata acpi_force = 0;
48 u32 acpi_rsdt_forced;
49 int acpi_disabled;
50 EXPORT_SYMBOL(acpi_disabled);
51 
52 #ifdef	CONFIG_X86_64
53 # include <asm/proto.h>
54 # include <asm/numa_64.h>
55 #endif				/* X86 */
56 
57 #define BAD_MADT_ENTRY(entry, end) (					    \
58 		(!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
59 		((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
60 
61 #define PREFIX			"ACPI: "
62 
63 int acpi_noirq;				/* skip ACPI IRQ initialization */
64 int acpi_pci_disabled;		/* skip ACPI PCI scan and IRQ initialization */
65 EXPORT_SYMBOL(acpi_pci_disabled);
66 
67 int acpi_lapic;
68 int acpi_ioapic;
69 int acpi_strict;
70 
71 u8 acpi_sci_flags __initdata;
72 int acpi_sci_override_gsi __initdata;
73 int acpi_skip_timer_override __initdata;
74 int acpi_use_timer_override __initdata;
75 int acpi_fix_pin2_polarity __initdata;
76 
77 #ifdef CONFIG_X86_LOCAL_APIC
78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
79 #endif
80 
81 #ifndef __HAVE_ARCH_CMPXCHG
82 #warning ACPI uses CMPXCHG, i486 and later hardware
83 #endif
84 
85 /* --------------------------------------------------------------------------
86                               Boot-time Configuration
87    -------------------------------------------------------------------------- */
88 
89 /*
90  * The default interrupt routing model is PIC (8259).  This gets
91  * overridden if IOAPICs are enumerated (below).
92  */
93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
94 
95 
96 /*
97  * ISA irqs by default are the first 16 gsis but can be
98  * any gsi as specified by an interrupt source override.
99  */
100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
101 	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
102 };
103 
104 static unsigned int gsi_to_irq(unsigned int gsi)
105 {
106 	unsigned int irq = gsi + NR_IRQS_LEGACY;
107 	unsigned int i;
108 
109 	for (i = 0; i < NR_IRQS_LEGACY; i++) {
110 		if (isa_irq_to_gsi[i] == gsi) {
111 			return i;
112 		}
113 	}
114 
115 	/* Provide an identity mapping of gsi == irq
116 	 * except on truly weird platforms that have
117 	 * non isa irqs in the first 16 gsis.
118 	 */
119 	if (gsi >= NR_IRQS_LEGACY)
120 		irq = gsi;
121 	else
122 		irq = gsi_top + gsi;
123 
124 	return irq;
125 }
126 
127 static u32 irq_to_gsi(int irq)
128 {
129 	unsigned int gsi;
130 
131 	if (irq < NR_IRQS_LEGACY)
132 		gsi = isa_irq_to_gsi[irq];
133 	else if (irq < gsi_top)
134 		gsi = irq;
135 	else if (irq < (gsi_top + NR_IRQS_LEGACY))
136 		gsi = irq - gsi_top;
137 	else
138 		gsi = 0xffffffff;
139 
140 	return gsi;
141 }
142 
143 /*
144  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
145  * to map the target physical address. The problem is that set_fixmap()
146  * provides a single page, and it is possible that the page is not
147  * sufficient.
148  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
149  * i.e. until the next __va_range() call.
150  *
151  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
152  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
153  * count idx down while incrementing the phys address.
154  */
155 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
156 {
157 
158 	if (!phys || !size)
159 		return NULL;
160 
161 	return early_ioremap(phys, size);
162 }
163 void __init __acpi_unmap_table(char *map, unsigned long size)
164 {
165 	if (!map || !size)
166 		return;
167 
168 	early_iounmap(map, size);
169 }
170 
171 #ifdef CONFIG_X86_LOCAL_APIC
172 static int __init acpi_parse_madt(struct acpi_table_header *table)
173 {
174 	struct acpi_table_madt *madt = NULL;
175 
176 	if (!cpu_has_apic)
177 		return -EINVAL;
178 
179 	madt = (struct acpi_table_madt *)table;
180 	if (!madt) {
181 		printk(KERN_WARNING PREFIX "Unable to map MADT\n");
182 		return -ENODEV;
183 	}
184 
185 	if (madt->address) {
186 		acpi_lapic_addr = (u64) madt->address;
187 
188 		printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
189 		       madt->address);
190 	}
191 
192 	default_acpi_madt_oem_check(madt->header.oem_id,
193 				    madt->header.oem_table_id);
194 
195 	return 0;
196 }
197 
198 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
199 {
200 	unsigned int ver = 0;
201 
202 	if (id >= (MAX_LOCAL_APIC-1)) {
203 		printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
204 		return;
205 	}
206 
207 	if (!enabled) {
208 		++disabled_cpus;
209 		return;
210 	}
211 
212 	if (boot_cpu_physical_apicid != -1U)
213 		ver = apic_version[boot_cpu_physical_apicid];
214 
215 	generic_processor_info(id, ver);
216 }
217 
218 static int __init
219 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
220 {
221 	struct acpi_madt_local_x2apic *processor = NULL;
222 	int apic_id;
223 	u8 enabled;
224 
225 	processor = (struct acpi_madt_local_x2apic *)header;
226 
227 	if (BAD_MADT_ENTRY(processor, end))
228 		return -EINVAL;
229 
230 	acpi_table_print_madt_entry(header);
231 
232 	apic_id = processor->local_apic_id;
233 	enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
234 #ifdef CONFIG_X86_X2APIC
235 	/*
236 	 * We need to register disabled CPU as well to permit
237 	 * counting disabled CPUs. This allows us to size
238 	 * cpus_possible_map more accurately, to permit
239 	 * to not preallocating memory for all NR_CPUS
240 	 * when we use CPU hotplug.
241 	 */
242 	if (!apic->apic_id_valid(apic_id) && enabled)
243 		printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
244 	else
245 		acpi_register_lapic(apic_id, enabled);
246 #else
247 	printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
248 #endif
249 
250 	return 0;
251 }
252 
253 static int __init
254 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
255 {
256 	struct acpi_madt_local_apic *processor = NULL;
257 
258 	processor = (struct acpi_madt_local_apic *)header;
259 
260 	if (BAD_MADT_ENTRY(processor, end))
261 		return -EINVAL;
262 
263 	acpi_table_print_madt_entry(header);
264 
265 	/*
266 	 * We need to register disabled CPU as well to permit
267 	 * counting disabled CPUs. This allows us to size
268 	 * cpus_possible_map more accurately, to permit
269 	 * to not preallocating memory for all NR_CPUS
270 	 * when we use CPU hotplug.
271 	 */
272 	acpi_register_lapic(processor->id,	/* APIC ID */
273 			    processor->lapic_flags & ACPI_MADT_ENABLED);
274 
275 	return 0;
276 }
277 
278 static int __init
279 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
280 {
281 	struct acpi_madt_local_sapic *processor = NULL;
282 
283 	processor = (struct acpi_madt_local_sapic *)header;
284 
285 	if (BAD_MADT_ENTRY(processor, end))
286 		return -EINVAL;
287 
288 	acpi_table_print_madt_entry(header);
289 
290 	acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
291 			    processor->lapic_flags & ACPI_MADT_ENABLED);
292 
293 	return 0;
294 }
295 
296 static int __init
297 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
298 			  const unsigned long end)
299 {
300 	struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
301 
302 	lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
303 
304 	if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
305 		return -EINVAL;
306 
307 	acpi_lapic_addr = lapic_addr_ovr->address;
308 
309 	return 0;
310 }
311 
312 static int __init
313 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
314 		      const unsigned long end)
315 {
316 	struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
317 
318 	x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
319 
320 	if (BAD_MADT_ENTRY(x2apic_nmi, end))
321 		return -EINVAL;
322 
323 	acpi_table_print_madt_entry(header);
324 
325 	if (x2apic_nmi->lint != 1)
326 		printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
327 
328 	return 0;
329 }
330 
331 static int __init
332 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
333 {
334 	struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
335 
336 	lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
337 
338 	if (BAD_MADT_ENTRY(lapic_nmi, end))
339 		return -EINVAL;
340 
341 	acpi_table_print_madt_entry(header);
342 
343 	if (lapic_nmi->lint != 1)
344 		printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
345 
346 	return 0;
347 }
348 
349 #endif				/*CONFIG_X86_LOCAL_APIC */
350 
351 #ifdef CONFIG_X86_IO_APIC
352 
353 static int __init
354 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
355 {
356 	struct acpi_madt_io_apic *ioapic = NULL;
357 
358 	ioapic = (struct acpi_madt_io_apic *)header;
359 
360 	if (BAD_MADT_ENTRY(ioapic, end))
361 		return -EINVAL;
362 
363 	acpi_table_print_madt_entry(header);
364 
365 	mp_register_ioapic(ioapic->id,
366 			   ioapic->address, ioapic->global_irq_base);
367 
368 	return 0;
369 }
370 
371 /*
372  * Parse Interrupt Source Override for the ACPI SCI
373  */
374 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
375 {
376 	if (trigger == 0)	/* compatible SCI trigger is level */
377 		trigger = 3;
378 
379 	if (polarity == 0)	/* compatible SCI polarity is low */
380 		polarity = 3;
381 
382 	/* Command-line over-ride via acpi_sci= */
383 	if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
384 		trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
385 
386 	if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
387 		polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
388 
389 	/*
390 	 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
391 	 * If GSI is < 16, this will update its flags,
392 	 * else it will create a new mp_irqs[] entry.
393 	 */
394 	mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
395 
396 	/*
397 	 * stash over-ride to indicate we've been here
398 	 * and for later update of acpi_gbl_FADT
399 	 */
400 	acpi_sci_override_gsi = gsi;
401 	return;
402 }
403 
404 static int __init
405 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
406 		       const unsigned long end)
407 {
408 	struct acpi_madt_interrupt_override *intsrc = NULL;
409 
410 	intsrc = (struct acpi_madt_interrupt_override *)header;
411 
412 	if (BAD_MADT_ENTRY(intsrc, end))
413 		return -EINVAL;
414 
415 	acpi_table_print_madt_entry(header);
416 
417 	if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
418 		acpi_sci_ioapic_setup(intsrc->source_irq,
419 				      intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
420 				      (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
421 				      intsrc->global_irq);
422 		return 0;
423 	}
424 
425 	if (intsrc->source_irq == 0) {
426 		if (acpi_skip_timer_override) {
427 			printk(PREFIX "BIOS IRQ0 override ignored.\n");
428 			return 0;
429 		}
430 
431 		if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
432 			&& (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
433 			intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
434 			printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
435 		}
436 	}
437 
438 	mp_override_legacy_irq(intsrc->source_irq,
439 				intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
440 				(intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
441 				intsrc->global_irq);
442 
443 	return 0;
444 }
445 
446 static int __init
447 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
448 {
449 	struct acpi_madt_nmi_source *nmi_src = NULL;
450 
451 	nmi_src = (struct acpi_madt_nmi_source *)header;
452 
453 	if (BAD_MADT_ENTRY(nmi_src, end))
454 		return -EINVAL;
455 
456 	acpi_table_print_madt_entry(header);
457 
458 	/* TBD: Support nimsrc entries? */
459 
460 	return 0;
461 }
462 
463 #endif				/* CONFIG_X86_IO_APIC */
464 
465 /*
466  * acpi_pic_sci_set_trigger()
467  *
468  * use ELCR to set PIC-mode trigger type for SCI
469  *
470  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
471  * it may require Edge Trigger -- use "acpi_sci=edge"
472  *
473  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
474  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
475  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
476  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
477  */
478 
479 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
480 {
481 	unsigned int mask = 1 << irq;
482 	unsigned int old, new;
483 
484 	/* Real old ELCR mask */
485 	old = inb(0x4d0) | (inb(0x4d1) << 8);
486 
487 	/*
488 	 * If we use ACPI to set PCI IRQs, then we should clear ELCR
489 	 * since we will set it correctly as we enable the PCI irq
490 	 * routing.
491 	 */
492 	new = acpi_noirq ? old : 0;
493 
494 	/*
495 	 * Update SCI information in the ELCR, it isn't in the PCI
496 	 * routing tables..
497 	 */
498 	switch (trigger) {
499 	case 1:		/* Edge - clear */
500 		new &= ~mask;
501 		break;
502 	case 3:		/* Level - set */
503 		new |= mask;
504 		break;
505 	}
506 
507 	if (old == new)
508 		return;
509 
510 	printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
511 	outb(new, 0x4d0);
512 	outb(new >> 8, 0x4d1);
513 }
514 
515 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
516 {
517 	*irq = gsi_to_irq(gsi);
518 
519 #ifdef CONFIG_X86_IO_APIC
520 	if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
521 		setup_IO_APIC_irq_extra(gsi);
522 #endif
523 
524 	return 0;
525 }
526 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
527 
528 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
529 {
530 	if (isa_irq >= 16)
531 		return -1;
532 	*gsi = irq_to_gsi(isa_irq);
533 	return 0;
534 }
535 
536 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
537 				 int trigger, int polarity)
538 {
539 #ifdef CONFIG_PCI
540 	/*
541 	 * Make sure all (legacy) PCI IRQs are set as level-triggered.
542 	 */
543 	if (trigger == ACPI_LEVEL_SENSITIVE)
544 		eisa_set_level_irq(gsi);
545 #endif
546 
547 	return gsi;
548 }
549 
550 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
551 				    int trigger, int polarity)
552 {
553 #ifdef CONFIG_X86_IO_APIC
554 	gsi = mp_register_gsi(dev, gsi, trigger, polarity);
555 #endif
556 
557 	return gsi;
558 }
559 
560 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
561 			   int trigger, int polarity) = acpi_register_gsi_pic;
562 
563 /*
564  * success: return IRQ number (>=0)
565  * failure: return < 0
566  */
567 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
568 {
569 	unsigned int irq;
570 	unsigned int plat_gsi = gsi;
571 
572 	plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
573 	irq = gsi_to_irq(plat_gsi);
574 
575 	return irq;
576 }
577 
578 void __init acpi_set_irq_model_pic(void)
579 {
580 	acpi_irq_model = ACPI_IRQ_MODEL_PIC;
581 	__acpi_register_gsi = acpi_register_gsi_pic;
582 	acpi_ioapic = 0;
583 }
584 
585 void __init acpi_set_irq_model_ioapic(void)
586 {
587 	acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
588 	__acpi_register_gsi = acpi_register_gsi_ioapic;
589 	acpi_ioapic = 1;
590 }
591 
592 /*
593  *  ACPI based hotplug support for CPU
594  */
595 #ifdef CONFIG_ACPI_HOTPLUG_CPU
596 #include <acpi/processor.h>
597 
598 static void __cpuinit acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
599 {
600 #ifdef CONFIG_ACPI_NUMA
601 	int nid;
602 
603 	nid = acpi_get_node(handle);
604 	if (nid == -1 || !node_online(nid))
605 		return;
606 	set_apicid_to_node(physid, nid);
607 	numa_set_node(cpu, nid);
608 #endif
609 }
610 
611 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
612 {
613 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
614 	union acpi_object *obj;
615 	struct acpi_madt_local_apic *lapic;
616 	cpumask_var_t tmp_map, new_map;
617 	u8 physid;
618 	int cpu;
619 	int retval = -ENOMEM;
620 
621 	if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
622 		return -EINVAL;
623 
624 	if (!buffer.length || !buffer.pointer)
625 		return -EINVAL;
626 
627 	obj = buffer.pointer;
628 	if (obj->type != ACPI_TYPE_BUFFER ||
629 	    obj->buffer.length < sizeof(*lapic)) {
630 		kfree(buffer.pointer);
631 		return -EINVAL;
632 	}
633 
634 	lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
635 
636 	if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
637 	    !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
638 		kfree(buffer.pointer);
639 		return -EINVAL;
640 	}
641 
642 	physid = lapic->id;
643 
644 	kfree(buffer.pointer);
645 	buffer.length = ACPI_ALLOCATE_BUFFER;
646 	buffer.pointer = NULL;
647 	lapic = NULL;
648 
649 	if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
650 		goto out;
651 
652 	if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
653 		goto free_tmp_map;
654 
655 	cpumask_copy(tmp_map, cpu_present_mask);
656 	acpi_register_lapic(physid, ACPI_MADT_ENABLED);
657 
658 	/*
659 	 * If acpi_register_lapic successfully generates a new logical cpu
660 	 * number, then the following will get us exactly what was mapped
661 	 */
662 	cpumask_andnot(new_map, cpu_present_mask, tmp_map);
663 	if (cpumask_empty(new_map)) {
664 		printk ("Unable to map lapic to logical cpu number\n");
665 		retval = -EINVAL;
666 		goto free_new_map;
667 	}
668 
669 	acpi_processor_set_pdc(handle);
670 
671 	cpu = cpumask_first(new_map);
672 	acpi_map_cpu2node(handle, cpu, physid);
673 
674 	*pcpu = cpu;
675 	retval = 0;
676 
677 free_new_map:
678 	free_cpumask_var(new_map);
679 free_tmp_map:
680 	free_cpumask_var(tmp_map);
681 out:
682 	return retval;
683 }
684 
685 /* wrapper to silence section mismatch warning */
686 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
687 {
688 	return _acpi_map_lsapic(handle, pcpu);
689 }
690 EXPORT_SYMBOL(acpi_map_lsapic);
691 
692 int acpi_unmap_lsapic(int cpu)
693 {
694 	per_cpu(x86_cpu_to_apicid, cpu) = -1;
695 	set_cpu_present(cpu, false);
696 	num_processors--;
697 
698 	return (0);
699 }
700 
701 EXPORT_SYMBOL(acpi_unmap_lsapic);
702 #endif				/* CONFIG_ACPI_HOTPLUG_CPU */
703 
704 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
705 {
706 	/* TBD */
707 	return -EINVAL;
708 }
709 
710 EXPORT_SYMBOL(acpi_register_ioapic);
711 
712 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
713 {
714 	/* TBD */
715 	return -EINVAL;
716 }
717 
718 EXPORT_SYMBOL(acpi_unregister_ioapic);
719 
720 static int __init acpi_parse_sbf(struct acpi_table_header *table)
721 {
722 	struct acpi_table_boot *sb;
723 
724 	sb = (struct acpi_table_boot *)table;
725 	if (!sb) {
726 		printk(KERN_WARNING PREFIX "Unable to map SBF\n");
727 		return -ENODEV;
728 	}
729 
730 	sbf_port = sb->cmos_index;	/* Save CMOS port */
731 
732 	return 0;
733 }
734 
735 #ifdef CONFIG_HPET_TIMER
736 #include <asm/hpet.h>
737 
738 static struct __initdata resource *hpet_res;
739 
740 static int __init acpi_parse_hpet(struct acpi_table_header *table)
741 {
742 	struct acpi_table_hpet *hpet_tbl;
743 
744 	hpet_tbl = (struct acpi_table_hpet *)table;
745 	if (!hpet_tbl) {
746 		printk(KERN_WARNING PREFIX "Unable to map HPET\n");
747 		return -ENODEV;
748 	}
749 
750 	if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
751 		printk(KERN_WARNING PREFIX "HPET timers must be located in "
752 		       "memory.\n");
753 		return -1;
754 	}
755 
756 	hpet_address = hpet_tbl->address.address;
757 	hpet_blockid = hpet_tbl->sequence;
758 
759 	/*
760 	 * Some broken BIOSes advertise HPET at 0x0. We really do not
761 	 * want to allocate a resource there.
762 	 */
763 	if (!hpet_address) {
764 		printk(KERN_WARNING PREFIX
765 		       "HPET id: %#x base: %#lx is invalid\n",
766 		       hpet_tbl->id, hpet_address);
767 		return 0;
768 	}
769 #ifdef CONFIG_X86_64
770 	/*
771 	 * Some even more broken BIOSes advertise HPET at
772 	 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
773 	 * some noise:
774 	 */
775 	if (hpet_address == 0xfed0000000000000UL) {
776 		if (!hpet_force_user) {
777 			printk(KERN_WARNING PREFIX "HPET id: %#x "
778 			       "base: 0xfed0000000000000 is bogus\n "
779 			       "try hpet=force on the kernel command line to "
780 			       "fix it up to 0xfed00000.\n", hpet_tbl->id);
781 			hpet_address = 0;
782 			return 0;
783 		}
784 		printk(KERN_WARNING PREFIX
785 		       "HPET id: %#x base: 0xfed0000000000000 fixed up "
786 		       "to 0xfed00000.\n", hpet_tbl->id);
787 		hpet_address >>= 32;
788 	}
789 #endif
790 	printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
791 	       hpet_tbl->id, hpet_address);
792 
793 	/*
794 	 * Allocate and initialize the HPET firmware resource for adding into
795 	 * the resource tree during the lateinit timeframe.
796 	 */
797 #define HPET_RESOURCE_NAME_SIZE 9
798 	hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
799 
800 	hpet_res->name = (void *)&hpet_res[1];
801 	hpet_res->flags = IORESOURCE_MEM;
802 	snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
803 		 hpet_tbl->sequence);
804 
805 	hpet_res->start = hpet_address;
806 	hpet_res->end = hpet_address + (1 * 1024) - 1;
807 
808 	return 0;
809 }
810 
811 /*
812  * hpet_insert_resource inserts the HPET resources used into the resource
813  * tree.
814  */
815 static __init int hpet_insert_resource(void)
816 {
817 	if (!hpet_res)
818 		return 1;
819 
820 	return insert_resource(&iomem_resource, hpet_res);
821 }
822 
823 late_initcall(hpet_insert_resource);
824 
825 #else
826 #define	acpi_parse_hpet	NULL
827 #endif
828 
829 static int __init acpi_parse_fadt(struct acpi_table_header *table)
830 {
831 
832 #ifdef CONFIG_X86_PM_TIMER
833 	/* detect the location of the ACPI PM Timer */
834 	if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
835 		/* FADT rev. 2 */
836 		if (acpi_gbl_FADT.xpm_timer_block.space_id !=
837 		    ACPI_ADR_SPACE_SYSTEM_IO)
838 			return 0;
839 
840 		pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
841 		/*
842 		 * "X" fields are optional extensions to the original V1.0
843 		 * fields, so we must selectively expand V1.0 fields if the
844 		 * corresponding X field is zero.
845 	 	 */
846 		if (!pmtmr_ioport)
847 			pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
848 	} else {
849 		/* FADT rev. 1 */
850 		pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
851 	}
852 	if (pmtmr_ioport)
853 		printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
854 		       pmtmr_ioport);
855 #endif
856 	return 0;
857 }
858 
859 #ifdef	CONFIG_X86_LOCAL_APIC
860 /*
861  * Parse LAPIC entries in MADT
862  * returns 0 on success, < 0 on error
863  */
864 
865 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
866 {
867 	int count;
868 
869 	if (!cpu_has_apic)
870 		return -ENODEV;
871 
872 	/*
873 	 * Note that the LAPIC address is obtained from the MADT (32-bit value)
874 	 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
875 	 */
876 
877 	count =
878 	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
879 				  acpi_parse_lapic_addr_ovr, 0);
880 	if (count < 0) {
881 		printk(KERN_ERR PREFIX
882 		       "Error parsing LAPIC address override entry\n");
883 		return count;
884 	}
885 
886 	register_lapic_address(acpi_lapic_addr);
887 
888 	return count;
889 }
890 
891 static int __init acpi_parse_madt_lapic_entries(void)
892 {
893 	int count;
894 	int x2count = 0;
895 
896 	if (!cpu_has_apic)
897 		return -ENODEV;
898 
899 	/*
900 	 * Note that the LAPIC address is obtained from the MADT (32-bit value)
901 	 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
902 	 */
903 
904 	count =
905 	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
906 				  acpi_parse_lapic_addr_ovr, 0);
907 	if (count < 0) {
908 		printk(KERN_ERR PREFIX
909 		       "Error parsing LAPIC address override entry\n");
910 		return count;
911 	}
912 
913 	register_lapic_address(acpi_lapic_addr);
914 
915 	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
916 				      acpi_parse_sapic, MAX_LOCAL_APIC);
917 
918 	if (!count) {
919 		x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
920 					acpi_parse_x2apic, MAX_LOCAL_APIC);
921 		count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
922 					acpi_parse_lapic, MAX_LOCAL_APIC);
923 	}
924 	if (!count && !x2count) {
925 		printk(KERN_ERR PREFIX "No LAPIC entries present\n");
926 		/* TBD: Cleanup to allow fallback to MPS */
927 		return -ENODEV;
928 	} else if (count < 0 || x2count < 0) {
929 		printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
930 		/* TBD: Cleanup to allow fallback to MPS */
931 		return count;
932 	}
933 
934 	x2count =
935 	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
936 				  acpi_parse_x2apic_nmi, 0);
937 	count =
938 	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
939 	if (count < 0 || x2count < 0) {
940 		printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
941 		/* TBD: Cleanup to allow fallback to MPS */
942 		return count;
943 	}
944 	return 0;
945 }
946 #endif				/* CONFIG_X86_LOCAL_APIC */
947 
948 #ifdef	CONFIG_X86_IO_APIC
949 #define MP_ISA_BUS		0
950 
951 #ifdef CONFIG_X86_ES7000
952 extern int es7000_plat;
953 #endif
954 
955 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
956 {
957 	int ioapic;
958 	int pin;
959 	struct mpc_intsrc mp_irq;
960 
961 	/*
962 	 * Convert 'gsi' to 'ioapic.pin'.
963 	 */
964 	ioapic = mp_find_ioapic(gsi);
965 	if (ioapic < 0)
966 		return;
967 	pin = mp_find_ioapic_pin(ioapic, gsi);
968 
969 	/*
970 	 * TBD: This check is for faulty timer entries, where the override
971 	 *      erroneously sets the trigger to level, resulting in a HUGE
972 	 *      increase of timer interrupts!
973 	 */
974 	if ((bus_irq == 0) && (trigger == 3))
975 		trigger = 1;
976 
977 	mp_irq.type = MP_INTSRC;
978 	mp_irq.irqtype = mp_INT;
979 	mp_irq.irqflag = (trigger << 2) | polarity;
980 	mp_irq.srcbus = MP_ISA_BUS;
981 	mp_irq.srcbusirq = bus_irq;	/* IRQ */
982 	mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
983 	mp_irq.dstirq = pin;	/* INTIN# */
984 
985 	mp_save_irq(&mp_irq);
986 
987 	isa_irq_to_gsi[bus_irq] = gsi;
988 }
989 
990 void __init mp_config_acpi_legacy_irqs(void)
991 {
992 	int i;
993 	struct mpc_intsrc mp_irq;
994 
995 #ifdef CONFIG_EISA
996 	/*
997 	 * Fabricate the legacy ISA bus (bus #31).
998 	 */
999 	mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1000 #endif
1001 	set_bit(MP_ISA_BUS, mp_bus_not_pci);
1002 	pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1003 
1004 #ifdef CONFIG_X86_ES7000
1005 	/*
1006 	 * Older generations of ES7000 have no legacy identity mappings
1007 	 */
1008 	if (es7000_plat == 1)
1009 		return;
1010 #endif
1011 
1012 	/*
1013 	 * Use the default configuration for the IRQs 0-15.  Unless
1014 	 * overridden by (MADT) interrupt source override entries.
1015 	 */
1016 	for (i = 0; i < 16; i++) {
1017 		int ioapic, pin;
1018 		unsigned int dstapic;
1019 		int idx;
1020 		u32 gsi;
1021 
1022 		/* Locate the gsi that irq i maps to. */
1023 		if (acpi_isa_irq_to_gsi(i, &gsi))
1024 			continue;
1025 
1026 		/*
1027 		 * Locate the IOAPIC that manages the ISA IRQ.
1028 		 */
1029 		ioapic = mp_find_ioapic(gsi);
1030 		if (ioapic < 0)
1031 			continue;
1032 		pin = mp_find_ioapic_pin(ioapic, gsi);
1033 		dstapic = mpc_ioapic_id(ioapic);
1034 
1035 		for (idx = 0; idx < mp_irq_entries; idx++) {
1036 			struct mpc_intsrc *irq = mp_irqs + idx;
1037 
1038 			/* Do we already have a mapping for this ISA IRQ? */
1039 			if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1040 				break;
1041 
1042 			/* Do we already have a mapping for this IOAPIC pin */
1043 			if (irq->dstapic == dstapic && irq->dstirq == pin)
1044 				break;
1045 		}
1046 
1047 		if (idx != mp_irq_entries) {
1048 			printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1049 			continue;	/* IRQ already used */
1050 		}
1051 
1052 		mp_irq.type = MP_INTSRC;
1053 		mp_irq.irqflag = 0;	/* Conforming */
1054 		mp_irq.srcbus = MP_ISA_BUS;
1055 		mp_irq.dstapic = dstapic;
1056 		mp_irq.irqtype = mp_INT;
1057 		mp_irq.srcbusirq = i; /* Identity mapped */
1058 		mp_irq.dstirq = pin;
1059 
1060 		mp_save_irq(&mp_irq);
1061 	}
1062 }
1063 
1064 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1065 			int polarity)
1066 {
1067 #ifdef CONFIG_X86_MPPARSE
1068 	struct mpc_intsrc mp_irq;
1069 	struct pci_dev *pdev;
1070 	unsigned char number;
1071 	unsigned int devfn;
1072 	int ioapic;
1073 	u8 pin;
1074 
1075 	if (!acpi_ioapic)
1076 		return 0;
1077 	if (!dev)
1078 		return 0;
1079 	if (dev->bus != &pci_bus_type)
1080 		return 0;
1081 
1082 	pdev = to_pci_dev(dev);
1083 	number = pdev->bus->number;
1084 	devfn = pdev->devfn;
1085 	pin = pdev->pin;
1086 	/* print the entry should happen on mptable identically */
1087 	mp_irq.type = MP_INTSRC;
1088 	mp_irq.irqtype = mp_INT;
1089 	mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1090 				(polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1091 	mp_irq.srcbus = number;
1092 	mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1093 	ioapic = mp_find_ioapic(gsi);
1094 	mp_irq.dstapic = mpc_ioapic_id(ioapic);
1095 	mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1096 
1097 	mp_save_irq(&mp_irq);
1098 #endif
1099 	return 0;
1100 }
1101 
1102 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1103 {
1104 	int ioapic;
1105 	int ioapic_pin;
1106 	struct io_apic_irq_attr irq_attr;
1107 
1108 	if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1109 		return gsi;
1110 
1111 	/* Don't set up the ACPI SCI because it's already set up */
1112 	if (acpi_gbl_FADT.sci_interrupt == gsi)
1113 		return gsi;
1114 
1115 	ioapic = mp_find_ioapic(gsi);
1116 	if (ioapic < 0) {
1117 		printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1118 		return gsi;
1119 	}
1120 
1121 	ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1122 
1123 	if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1124 		printk(KERN_ERR "Invalid reference to IOAPIC pin "
1125 		       "%d-%d\n", mpc_ioapic_id(ioapic),
1126 		       ioapic_pin);
1127 		return gsi;
1128 	}
1129 
1130 	if (enable_update_mptable)
1131 		mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1132 
1133 	set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1134 			     trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1135 			     polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1136 	io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1137 
1138 	return gsi;
1139 }
1140 
1141 /*
1142  * Parse IOAPIC related entries in MADT
1143  * returns 0 on success, < 0 on error
1144  */
1145 static int __init acpi_parse_madt_ioapic_entries(void)
1146 {
1147 	int count;
1148 
1149 	/*
1150 	 * ACPI interpreter is required to complete interrupt setup,
1151 	 * so if it is off, don't enumerate the io-apics with ACPI.
1152 	 * If MPS is present, it will handle them,
1153 	 * otherwise the system will stay in PIC mode
1154 	 */
1155 	if (acpi_disabled || acpi_noirq)
1156 		return -ENODEV;
1157 
1158 	if (!cpu_has_apic)
1159 		return -ENODEV;
1160 
1161 	/*
1162 	 * if "noapic" boot option, don't look for IO-APICs
1163 	 */
1164 	if (skip_ioapic_setup) {
1165 		printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1166 		       "due to 'noapic' option.\n");
1167 		return -ENODEV;
1168 	}
1169 
1170 	count =
1171 	    acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1172 				  MAX_IO_APICS);
1173 	if (!count) {
1174 		printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1175 		return -ENODEV;
1176 	} else if (count < 0) {
1177 		printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1178 		return count;
1179 	}
1180 
1181 	count =
1182 	    acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1183 				  nr_irqs);
1184 	if (count < 0) {
1185 		printk(KERN_ERR PREFIX
1186 		       "Error parsing interrupt source overrides entry\n");
1187 		/* TBD: Cleanup to allow fallback to MPS */
1188 		return count;
1189 	}
1190 
1191 	/*
1192 	 * If BIOS did not supply an INT_SRC_OVR for the SCI
1193 	 * pretend we got one so we can set the SCI flags.
1194 	 */
1195 	if (!acpi_sci_override_gsi)
1196 		acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1197 				      acpi_gbl_FADT.sci_interrupt);
1198 
1199 	/* Fill in identity legacy mappings where no override */
1200 	mp_config_acpi_legacy_irqs();
1201 
1202 	count =
1203 	    acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1204 				  nr_irqs);
1205 	if (count < 0) {
1206 		printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1207 		/* TBD: Cleanup to allow fallback to MPS */
1208 		return count;
1209 	}
1210 
1211 	return 0;
1212 }
1213 #else
1214 static inline int acpi_parse_madt_ioapic_entries(void)
1215 {
1216 	return -1;
1217 }
1218 #endif	/* !CONFIG_X86_IO_APIC */
1219 
1220 static void __init early_acpi_process_madt(void)
1221 {
1222 #ifdef CONFIG_X86_LOCAL_APIC
1223 	int error;
1224 
1225 	if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1226 
1227 		/*
1228 		 * Parse MADT LAPIC entries
1229 		 */
1230 		error = early_acpi_parse_madt_lapic_addr_ovr();
1231 		if (!error) {
1232 			acpi_lapic = 1;
1233 			smp_found_config = 1;
1234 		}
1235 		if (error == -EINVAL) {
1236 			/*
1237 			 * Dell Precision Workstation 410, 610 come here.
1238 			 */
1239 			printk(KERN_ERR PREFIX
1240 			       "Invalid BIOS MADT, disabling ACPI\n");
1241 			disable_acpi();
1242 		}
1243 	}
1244 #endif
1245 }
1246 
1247 static void __init 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 = acpi_parse_madt_lapic_entries();
1258 		if (!error) {
1259 			acpi_lapic = 1;
1260 
1261 			/*
1262 			 * Parse MADT IO-APIC entries
1263 			 */
1264 			error = acpi_parse_madt_ioapic_entries();
1265 			if (!error) {
1266 				acpi_set_irq_model_ioapic();
1267 
1268 				smp_found_config = 1;
1269 			}
1270 		}
1271 		if (error == -EINVAL) {
1272 			/*
1273 			 * Dell Precision Workstation 410, 610 come here.
1274 			 */
1275 			printk(KERN_ERR PREFIX
1276 			       "Invalid BIOS MADT, disabling ACPI\n");
1277 			disable_acpi();
1278 		}
1279 	} else {
1280 		/*
1281  		 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1282  		 * In the event an MPS table was found, forget it.
1283  		 * Boot with "acpi=off" to use MPS on such a system.
1284  		 */
1285 		if (smp_found_config) {
1286 			printk(KERN_WARNING PREFIX
1287 				"No APIC-table, disabling MPS\n");
1288 			smp_found_config = 0;
1289 		}
1290 	}
1291 
1292 	/*
1293 	 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1294 	 * processors, where MPS only supports physical.
1295 	 */
1296 	if (acpi_lapic && acpi_ioapic)
1297 		printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1298 		       "information\n");
1299 	else if (acpi_lapic)
1300 		printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1301 		       "configuration information\n");
1302 #endif
1303 	return;
1304 }
1305 
1306 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1307 {
1308 	if (!acpi_force) {
1309 		printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1310 		       d->ident);
1311 		acpi_noirq_set();
1312 	}
1313 	return 0;
1314 }
1315 
1316 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1317 {
1318 	if (!acpi_force) {
1319 		printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1320 		       d->ident);
1321 		acpi_disable_pci();
1322 	}
1323 	return 0;
1324 }
1325 
1326 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1327 {
1328 	if (!acpi_force) {
1329 		printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1330 		disable_acpi();
1331 	} else {
1332 		printk(KERN_NOTICE
1333 		       "Warning: DMI blacklist says broken, but acpi forced\n");
1334 	}
1335 	return 0;
1336 }
1337 
1338 /*
1339  * Force ignoring BIOS IRQ0 override
1340  */
1341 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1342 {
1343 	if (!acpi_skip_timer_override) {
1344 		pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1345 			d->ident);
1346 		acpi_skip_timer_override = 1;
1347 	}
1348 	return 0;
1349 }
1350 
1351 /*
1352  * If your system is blacklisted here, but you find that acpi=force
1353  * works for you, please contact linux-acpi@vger.kernel.org
1354  */
1355 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1356 	/*
1357 	 * Boxes that need ACPI disabled
1358 	 */
1359 	{
1360 	 .callback = dmi_disable_acpi,
1361 	 .ident = "IBM Thinkpad",
1362 	 .matches = {
1363 		     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1364 		     DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1365 		     },
1366 	 },
1367 
1368 	/*
1369 	 * Boxes that need ACPI PCI IRQ routing disabled
1370 	 */
1371 	{
1372 	 .callback = disable_acpi_irq,
1373 	 .ident = "ASUS A7V",
1374 	 .matches = {
1375 		     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1376 		     DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1377 		     /* newer BIOS, Revision 1011, does work */
1378 		     DMI_MATCH(DMI_BIOS_VERSION,
1379 			       "ASUS A7V ACPI BIOS Revision 1007"),
1380 		     },
1381 	 },
1382 	{
1383 		/*
1384 		 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1385 		 * for LPC bridge, which is needed for the PCI
1386 		 * interrupt links to work. DSDT fix is in bug 5966.
1387 		 * 2645, 2646 model numbers are shared with 600/600E/600X
1388 		 */
1389 	 .callback = disable_acpi_irq,
1390 	 .ident = "IBM Thinkpad 600 Series 2645",
1391 	 .matches = {
1392 		     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1393 		     DMI_MATCH(DMI_BOARD_NAME, "2645"),
1394 		     },
1395 	 },
1396 	{
1397 	 .callback = disable_acpi_irq,
1398 	 .ident = "IBM Thinkpad 600 Series 2646",
1399 	 .matches = {
1400 		     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1401 		     DMI_MATCH(DMI_BOARD_NAME, "2646"),
1402 		     },
1403 	 },
1404 	/*
1405 	 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1406 	 */
1407 	{			/* _BBN 0 bug */
1408 	 .callback = disable_acpi_pci,
1409 	 .ident = "ASUS PR-DLS",
1410 	 .matches = {
1411 		     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1412 		     DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1413 		     DMI_MATCH(DMI_BIOS_VERSION,
1414 			       "ASUS PR-DLS ACPI BIOS Revision 1010"),
1415 		     DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1416 		     },
1417 	 },
1418 	{
1419 	 .callback = disable_acpi_pci,
1420 	 .ident = "Acer TravelMate 36x Laptop",
1421 	 .matches = {
1422 		     DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1423 		     DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1424 		     },
1425 	 },
1426 	{}
1427 };
1428 
1429 /* second table for DMI checks that should run after early-quirks */
1430 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1431 	/*
1432 	 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1433 	 * which includes some code which overrides all temperature
1434 	 * trip points to 16C if the INTIN2 input of the I/O APIC
1435 	 * is enabled.  This input is incorrectly designated the
1436 	 * ISA IRQ 0 via an interrupt source override even though
1437 	 * it is wired to the output of the master 8259A and INTIN0
1438 	 * is not connected at all.  Force ignoring BIOS IRQ0
1439 	 * override in that cases.
1440 	 */
1441 	{
1442 	 .callback = dmi_ignore_irq0_timer_override,
1443 	 .ident = "HP nx6115 laptop",
1444 	 .matches = {
1445 		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1446 		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1447 		     },
1448 	 },
1449 	{
1450 	 .callback = dmi_ignore_irq0_timer_override,
1451 	 .ident = "HP NX6125 laptop",
1452 	 .matches = {
1453 		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1454 		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1455 		     },
1456 	 },
1457 	{
1458 	 .callback = dmi_ignore_irq0_timer_override,
1459 	 .ident = "HP NX6325 laptop",
1460 	 .matches = {
1461 		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1462 		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1463 		     },
1464 	 },
1465 	{
1466 	 .callback = dmi_ignore_irq0_timer_override,
1467 	 .ident = "HP 6715b laptop",
1468 	 .matches = {
1469 		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1470 		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1471 		     },
1472 	 },
1473 	{
1474 	 .callback = dmi_ignore_irq0_timer_override,
1475 	 .ident = "FUJITSU SIEMENS",
1476 	 .matches = {
1477 		     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1478 		     DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1479 		     },
1480 	 },
1481 	{}
1482 };
1483 
1484 /*
1485  * acpi_boot_table_init() and acpi_boot_init()
1486  *  called from setup_arch(), always.
1487  *	1. checksums all tables
1488  *	2. enumerates lapics
1489  *	3. enumerates io-apics
1490  *
1491  * acpi_table_init() is separate to allow reading SRAT without
1492  * other side effects.
1493  *
1494  * side effects of acpi_boot_init:
1495  *	acpi_lapic = 1 if LAPIC found
1496  *	acpi_ioapic = 1 if IOAPIC found
1497  *	if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1498  *	if acpi_blacklisted() acpi_disabled = 1;
1499  *	acpi_irq_model=...
1500  *	...
1501  */
1502 
1503 void __init acpi_boot_table_init(void)
1504 {
1505 	dmi_check_system(acpi_dmi_table);
1506 
1507 	/*
1508 	 * If acpi_disabled, bail out
1509 	 */
1510 	if (acpi_disabled)
1511 		return;
1512 
1513 	/*
1514 	 * Initialize the ACPI boot-time table parser.
1515 	 */
1516 	if (acpi_table_init()) {
1517 		disable_acpi();
1518 		return;
1519 	}
1520 
1521 	acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1522 
1523 	/*
1524 	 * blacklist may disable ACPI entirely
1525 	 */
1526 	if (acpi_blacklisted()) {
1527 		if (acpi_force) {
1528 			printk(KERN_WARNING PREFIX "acpi=force override\n");
1529 		} else {
1530 			printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1531 			disable_acpi();
1532 			return;
1533 		}
1534 	}
1535 }
1536 
1537 int __init early_acpi_boot_init(void)
1538 {
1539 	/*
1540 	 * If acpi_disabled, bail out
1541 	 */
1542 	if (acpi_disabled)
1543 		return 1;
1544 
1545 	/*
1546 	 * Process the Multiple APIC Description Table (MADT), if present
1547 	 */
1548 	early_acpi_process_madt();
1549 
1550 	return 0;
1551 }
1552 
1553 int __init acpi_boot_init(void)
1554 {
1555 	/* those are executed after early-quirks are executed */
1556 	dmi_check_system(acpi_dmi_table_late);
1557 
1558 	/*
1559 	 * If acpi_disabled, bail out
1560 	 */
1561 	if (acpi_disabled)
1562 		return 1;
1563 
1564 	acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1565 
1566 	/*
1567 	 * set sci_int and PM timer address
1568 	 */
1569 	acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1570 
1571 	/*
1572 	 * Process the Multiple APIC Description Table (MADT), if present
1573 	 */
1574 	acpi_process_madt();
1575 
1576 	acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1577 
1578 	if (!acpi_noirq)
1579 		x86_init.pci.init = pci_acpi_init;
1580 
1581 	return 0;
1582 }
1583 
1584 static int __init parse_acpi(char *arg)
1585 {
1586 	if (!arg)
1587 		return -EINVAL;
1588 
1589 	/* "acpi=off" disables both ACPI table parsing and interpreter */
1590 	if (strcmp(arg, "off") == 0) {
1591 		disable_acpi();
1592 	}
1593 	/* acpi=force to over-ride black-list */
1594 	else if (strcmp(arg, "force") == 0) {
1595 		acpi_force = 1;
1596 		acpi_disabled = 0;
1597 	}
1598 	/* acpi=strict disables out-of-spec workarounds */
1599 	else if (strcmp(arg, "strict") == 0) {
1600 		acpi_strict = 1;
1601 	}
1602 	/* acpi=rsdt use RSDT instead of XSDT */
1603 	else if (strcmp(arg, "rsdt") == 0) {
1604 		acpi_rsdt_forced = 1;
1605 	}
1606 	/* "acpi=noirq" disables ACPI interrupt routing */
1607 	else if (strcmp(arg, "noirq") == 0) {
1608 		acpi_noirq_set();
1609 	}
1610 	/* "acpi=copy_dsdt" copys DSDT */
1611 	else if (strcmp(arg, "copy_dsdt") == 0) {
1612 		acpi_gbl_copy_dsdt_locally = 1;
1613 	} else {
1614 		/* Core will printk when we return error. */
1615 		return -EINVAL;
1616 	}
1617 	return 0;
1618 }
1619 early_param("acpi", parse_acpi);
1620 
1621 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1622 static int __init parse_pci(char *arg)
1623 {
1624 	if (arg && strcmp(arg, "noacpi") == 0)
1625 		acpi_disable_pci();
1626 	return 0;
1627 }
1628 early_param("pci", parse_pci);
1629 
1630 int __init acpi_mps_check(void)
1631 {
1632 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1633 /* mptable code is not built-in*/
1634 	if (acpi_disabled || acpi_noirq) {
1635 		printk(KERN_WARNING "MPS support code is not built-in.\n"
1636 		       "Using acpi=off or acpi=noirq or pci=noacpi "
1637 		       "may have problem\n");
1638 		return 1;
1639 	}
1640 #endif
1641 	return 0;
1642 }
1643 
1644 #ifdef CONFIG_X86_IO_APIC
1645 static int __init parse_acpi_skip_timer_override(char *arg)
1646 {
1647 	acpi_skip_timer_override = 1;
1648 	return 0;
1649 }
1650 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1651 
1652 static int __init parse_acpi_use_timer_override(char *arg)
1653 {
1654 	acpi_use_timer_override = 1;
1655 	return 0;
1656 }
1657 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1658 #endif /* CONFIG_X86_IO_APIC */
1659 
1660 static int __init setup_acpi_sci(char *s)
1661 {
1662 	if (!s)
1663 		return -EINVAL;
1664 	if (!strcmp(s, "edge"))
1665 		acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1666 			(acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1667 	else if (!strcmp(s, "level"))
1668 		acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1669 			(acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1670 	else if (!strcmp(s, "high"))
1671 		acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1672 			(acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1673 	else if (!strcmp(s, "low"))
1674 		acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1675 			(acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1676 	else
1677 		return -EINVAL;
1678 	return 0;
1679 }
1680 early_param("acpi_sci", setup_acpi_sci);
1681 
1682 int __acpi_acquire_global_lock(unsigned int *lock)
1683 {
1684 	unsigned int old, new, val;
1685 	do {
1686 		old = *lock;
1687 		new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1688 		val = cmpxchg(lock, old, new);
1689 	} while (unlikely (val != old));
1690 	return (new < 3) ? -1 : 0;
1691 }
1692 
1693 int __acpi_release_global_lock(unsigned int *lock)
1694 {
1695 	unsigned int old, new, val;
1696 	do {
1697 		old = *lock;
1698 		new = old & ~0x3;
1699 		val = cmpxchg(lock, old, new);
1700 	} while (unlikely (val != old));
1701 	return old & 0x1;
1702 }
1703