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[deliverable/linux.git] / arch / x86 / kernel / acpi / boot.c
1 /*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38
39 #include <asm/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 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
48 static int __initdata acpi_force = 0;
49 int acpi_disabled;
50 EXPORT_SYMBOL(acpi_disabled);
51
52 #ifdef CONFIG_X86_64
53 # include <asm/proto.h>
54 #endif /* X86 */
55
56 #define PREFIX "ACPI: "
57
58 int acpi_noirq; /* skip ACPI IRQ initialization */
59 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
60 EXPORT_SYMBOL(acpi_pci_disabled);
61
62 int acpi_lapic;
63 int acpi_ioapic;
64 int acpi_strict;
65 int acpi_disable_cmcff;
66
67 u8 acpi_sci_flags __initdata;
68 int acpi_sci_override_gsi __initdata;
69 int acpi_skip_timer_override __initdata;
70 int acpi_use_timer_override __initdata;
71 int acpi_fix_pin2_polarity __initdata;
72
73 #ifdef CONFIG_X86_LOCAL_APIC
74 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
75 #endif
76
77 #ifndef __HAVE_ARCH_CMPXCHG
78 #warning ACPI uses CMPXCHG, i486 and later hardware
79 #endif
80
81 /* --------------------------------------------------------------------------
82 Boot-time Configuration
83 -------------------------------------------------------------------------- */
84
85 /*
86 * The default interrupt routing model is PIC (8259). This gets
87 * overridden if IOAPICs are enumerated (below).
88 */
89 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
90
91
92 /*
93 * ISA irqs by default are the first 16 gsis but can be
94 * any gsi as specified by an interrupt source override.
95 */
96 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
97 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
98 };
99
100 #define ACPI_INVALID_GSI INT_MIN
101
102 static unsigned int gsi_to_irq(unsigned int gsi)
103 {
104 unsigned int irq = gsi + NR_IRQS_LEGACY;
105 unsigned int i;
106
107 for (i = 0; i < NR_IRQS_LEGACY; i++) {
108 if (isa_irq_to_gsi[i] == gsi) {
109 return i;
110 }
111 }
112
113 /* Provide an identity mapping of gsi == irq
114 * except on truly weird platforms that have
115 * non isa irqs in the first 16 gsis.
116 */
117 if (gsi >= NR_IRQS_LEGACY)
118 irq = gsi;
119 else
120 irq = gsi_top + gsi;
121
122 return irq;
123 }
124
125 /*
126 * This is just a simple wrapper around early_ioremap(),
127 * with sanity checks for phys == 0 and size == 0.
128 */
129 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
130 {
131
132 if (!phys || !size)
133 return NULL;
134
135 return early_ioremap(phys, size);
136 }
137
138 void __init __acpi_unmap_table(char *map, unsigned long size)
139 {
140 if (!map || !size)
141 return;
142
143 early_iounmap(map, size);
144 }
145
146 #ifdef CONFIG_X86_LOCAL_APIC
147 static int __init acpi_parse_madt(struct acpi_table_header *table)
148 {
149 struct acpi_table_madt *madt = NULL;
150
151 if (!cpu_has_apic)
152 return -EINVAL;
153
154 madt = (struct acpi_table_madt *)table;
155 if (!madt) {
156 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
157 return -ENODEV;
158 }
159
160 if (madt->address) {
161 acpi_lapic_addr = (u64) madt->address;
162
163 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
164 madt->address);
165 }
166
167 default_acpi_madt_oem_check(madt->header.oem_id,
168 madt->header.oem_table_id);
169
170 return 0;
171 }
172
173 /**
174 * acpi_register_lapic - register a local apic and generates a logic cpu number
175 * @id: local apic id to register
176 * @enabled: this cpu is enabled or not
177 *
178 * Returns the logic cpu number which maps to the local apic
179 */
180 static int acpi_register_lapic(int id, u8 enabled)
181 {
182 unsigned int ver = 0;
183
184 if (id >= MAX_LOCAL_APIC) {
185 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
186 return -EINVAL;
187 }
188
189 if (!enabled) {
190 ++disabled_cpus;
191 return -EINVAL;
192 }
193
194 if (boot_cpu_physical_apicid != -1U)
195 ver = apic_version[boot_cpu_physical_apicid];
196
197 return generic_processor_info(id, ver);
198 }
199
200 static int __init
201 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
202 {
203 struct acpi_madt_local_x2apic *processor = NULL;
204 int apic_id;
205 u8 enabled;
206
207 processor = (struct acpi_madt_local_x2apic *)header;
208
209 if (BAD_MADT_ENTRY(processor, end))
210 return -EINVAL;
211
212 acpi_table_print_madt_entry(header);
213
214 apic_id = processor->local_apic_id;
215 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
216 #ifdef CONFIG_X86_X2APIC
217 /*
218 * We need to register disabled CPU as well to permit
219 * counting disabled CPUs. This allows us to size
220 * cpus_possible_map more accurately, to permit
221 * to not preallocating memory for all NR_CPUS
222 * when we use CPU hotplug.
223 */
224 if (!apic->apic_id_valid(apic_id) && enabled)
225 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
226 else
227 acpi_register_lapic(apic_id, enabled);
228 #else
229 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
230 #endif
231
232 return 0;
233 }
234
235 static int __init
236 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
237 {
238 struct acpi_madt_local_apic *processor = NULL;
239
240 processor = (struct acpi_madt_local_apic *)header;
241
242 if (BAD_MADT_ENTRY(processor, end))
243 return -EINVAL;
244
245 acpi_table_print_madt_entry(header);
246
247 /*
248 * We need to register disabled CPU as well to permit
249 * counting disabled CPUs. This allows us to size
250 * cpus_possible_map more accurately, to permit
251 * to not preallocating memory for all NR_CPUS
252 * when we use CPU hotplug.
253 */
254 acpi_register_lapic(processor->id, /* APIC ID */
255 processor->lapic_flags & ACPI_MADT_ENABLED);
256
257 return 0;
258 }
259
260 static int __init
261 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
262 {
263 struct acpi_madt_local_sapic *processor = NULL;
264
265 processor = (struct acpi_madt_local_sapic *)header;
266
267 if (BAD_MADT_ENTRY(processor, end))
268 return -EINVAL;
269
270 acpi_table_print_madt_entry(header);
271
272 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
273 processor->lapic_flags & ACPI_MADT_ENABLED);
274
275 return 0;
276 }
277
278 static int __init
279 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
280 const unsigned long end)
281 {
282 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
283
284 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
285
286 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
287 return -EINVAL;
288
289 acpi_lapic_addr = lapic_addr_ovr->address;
290
291 return 0;
292 }
293
294 static int __init
295 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
296 const unsigned long end)
297 {
298 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
299
300 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
301
302 if (BAD_MADT_ENTRY(x2apic_nmi, end))
303 return -EINVAL;
304
305 acpi_table_print_madt_entry(header);
306
307 if (x2apic_nmi->lint != 1)
308 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
309
310 return 0;
311 }
312
313 static int __init
314 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
315 {
316 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
317
318 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
319
320 if (BAD_MADT_ENTRY(lapic_nmi, end))
321 return -EINVAL;
322
323 acpi_table_print_madt_entry(header);
324
325 if (lapic_nmi->lint != 1)
326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
327
328 return 0;
329 }
330
331 #endif /*CONFIG_X86_LOCAL_APIC */
332
333 #ifdef CONFIG_X86_IO_APIC
334 #define MP_ISA_BUS 0
335
336 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
337 u32 gsi)
338 {
339 int ioapic;
340 int pin;
341 struct mpc_intsrc mp_irq;
342
343 /*
344 * Convert 'gsi' to 'ioapic.pin'.
345 */
346 ioapic = mp_find_ioapic(gsi);
347 if (ioapic < 0)
348 return;
349 pin = mp_find_ioapic_pin(ioapic, gsi);
350
351 /*
352 * TBD: This check is for faulty timer entries, where the override
353 * erroneously sets the trigger to level, resulting in a HUGE
354 * increase of timer interrupts!
355 */
356 if ((bus_irq == 0) && (trigger == 3))
357 trigger = 1;
358
359 mp_irq.type = MP_INTSRC;
360 mp_irq.irqtype = mp_INT;
361 mp_irq.irqflag = (trigger << 2) | polarity;
362 mp_irq.srcbus = MP_ISA_BUS;
363 mp_irq.srcbusirq = bus_irq; /* IRQ */
364 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
365 mp_irq.dstirq = pin; /* INTIN# */
366
367 mp_save_irq(&mp_irq);
368
369 /*
370 * Reset default identity mapping if gsi is also an legacy IRQ,
371 * otherwise there will be more than one entry with the same GSI
372 * and acpi_isa_irq_to_gsi() may give wrong result.
373 */
374 if (gsi < NR_IRQS_LEGACY && isa_irq_to_gsi[gsi] == gsi)
375 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
376 isa_irq_to_gsi[bus_irq] = gsi;
377 }
378
379 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
380 int polarity)
381 {
382 #ifdef CONFIG_X86_MPPARSE
383 struct mpc_intsrc mp_irq;
384 struct pci_dev *pdev;
385 unsigned char number;
386 unsigned int devfn;
387 int ioapic;
388 u8 pin;
389
390 if (!acpi_ioapic)
391 return 0;
392 if (!dev || !dev_is_pci(dev))
393 return 0;
394
395 pdev = to_pci_dev(dev);
396 number = pdev->bus->number;
397 devfn = pdev->devfn;
398 pin = pdev->pin;
399 /* print the entry should happen on mptable identically */
400 mp_irq.type = MP_INTSRC;
401 mp_irq.irqtype = mp_INT;
402 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
403 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
404 mp_irq.srcbus = number;
405 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
406 ioapic = mp_find_ioapic(gsi);
407 mp_irq.dstapic = mpc_ioapic_id(ioapic);
408 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
409
410 mp_save_irq(&mp_irq);
411 #endif
412 return 0;
413 }
414
415 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
416 int polarity)
417 {
418 int ioapic;
419 int ioapic_pin;
420 struct io_apic_irq_attr irq_attr;
421 int ret;
422
423 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
424 return gsi;
425
426 /* Don't set up the ACPI SCI because it's already set up */
427 if (acpi_gbl_FADT.sci_interrupt == gsi)
428 return gsi;
429
430 ioapic = mp_find_ioapic(gsi);
431 if (ioapic < 0) {
432 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
433 return gsi;
434 }
435
436 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
437
438 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
439 printk(KERN_ERR "Invalid reference to IOAPIC pin "
440 "%d-%d\n", mpc_ioapic_id(ioapic),
441 ioapic_pin);
442 return gsi;
443 }
444
445 if (enable_update_mptable)
446 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
447
448 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
449 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
450 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
451 ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
452 if (ret < 0)
453 gsi = ACPI_INVALID_GSI;
454
455 return gsi;
456 }
457
458
459 static int __init
460 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
461 {
462 struct acpi_madt_io_apic *ioapic = NULL;
463
464 ioapic = (struct acpi_madt_io_apic *)header;
465
466 if (BAD_MADT_ENTRY(ioapic, end))
467 return -EINVAL;
468
469 acpi_table_print_madt_entry(header);
470
471 mp_register_ioapic(ioapic->id,
472 ioapic->address, ioapic->global_irq_base);
473
474 return 0;
475 }
476
477 /*
478 * Parse Interrupt Source Override for the ACPI SCI
479 */
480 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
481 {
482 if (trigger == 0) /* compatible SCI trigger is level */
483 trigger = 3;
484
485 if (polarity == 0) /* compatible SCI polarity is low */
486 polarity = 3;
487
488 /* Command-line over-ride via acpi_sci= */
489 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
490 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
491
492 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
493 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
494
495 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
496
497 /*
498 * stash over-ride to indicate we've been here
499 * and for later update of acpi_gbl_FADT
500 */
501 acpi_sci_override_gsi = gsi;
502 return;
503 }
504
505 static int __init
506 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
507 const unsigned long end)
508 {
509 struct acpi_madt_interrupt_override *intsrc = NULL;
510
511 intsrc = (struct acpi_madt_interrupt_override *)header;
512
513 if (BAD_MADT_ENTRY(intsrc, end))
514 return -EINVAL;
515
516 acpi_table_print_madt_entry(header);
517
518 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
519 acpi_sci_ioapic_setup(intsrc->source_irq,
520 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
521 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
522 intsrc->global_irq);
523 return 0;
524 }
525
526 if (intsrc->source_irq == 0) {
527 if (acpi_skip_timer_override) {
528 printk(PREFIX "BIOS IRQ0 override ignored.\n");
529 return 0;
530 }
531
532 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
533 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
534 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
535 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
536 }
537 }
538
539 mp_override_legacy_irq(intsrc->source_irq,
540 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
541 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
542 intsrc->global_irq);
543
544 return 0;
545 }
546
547 static int __init
548 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
549 {
550 struct acpi_madt_nmi_source *nmi_src = NULL;
551
552 nmi_src = (struct acpi_madt_nmi_source *)header;
553
554 if (BAD_MADT_ENTRY(nmi_src, end))
555 return -EINVAL;
556
557 acpi_table_print_madt_entry(header);
558
559 /* TBD: Support nimsrc entries? */
560
561 return 0;
562 }
563
564 #endif /* CONFIG_X86_IO_APIC */
565
566 /*
567 * acpi_pic_sci_set_trigger()
568 *
569 * use ELCR to set PIC-mode trigger type for SCI
570 *
571 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
572 * it may require Edge Trigger -- use "acpi_sci=edge"
573 *
574 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
575 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
576 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
577 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
578 */
579
580 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
581 {
582 unsigned int mask = 1 << irq;
583 unsigned int old, new;
584
585 /* Real old ELCR mask */
586 old = inb(0x4d0) | (inb(0x4d1) << 8);
587
588 /*
589 * If we use ACPI to set PCI IRQs, then we should clear ELCR
590 * since we will set it correctly as we enable the PCI irq
591 * routing.
592 */
593 new = acpi_noirq ? old : 0;
594
595 /*
596 * Update SCI information in the ELCR, it isn't in the PCI
597 * routing tables..
598 */
599 switch (trigger) {
600 case 1: /* Edge - clear */
601 new &= ~mask;
602 break;
603 case 3: /* Level - set */
604 new |= mask;
605 break;
606 }
607
608 if (old == new)
609 return;
610
611 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
612 outb(new, 0x4d0);
613 outb(new >> 8, 0x4d1);
614 }
615
616 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
617 {
618 *irq = gsi_to_irq(gsi);
619
620 #ifdef CONFIG_X86_IO_APIC
621 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
622 setup_IO_APIC_irq_extra(gsi);
623 #endif
624
625 return 0;
626 }
627 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
628
629 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
630 {
631 if (isa_irq < NR_IRQS_LEGACY &&
632 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
633 *gsi = isa_irq_to_gsi[isa_irq];
634 return 0;
635 }
636
637 return -1;
638 }
639
640 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
641 int trigger, int polarity)
642 {
643 #ifdef CONFIG_PCI
644 /*
645 * Make sure all (legacy) PCI IRQs are set as level-triggered.
646 */
647 if (trigger == ACPI_LEVEL_SENSITIVE)
648 eisa_set_level_irq(gsi);
649 #endif
650
651 return gsi;
652 }
653
654 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
655 int trigger, int polarity)
656 {
657 #ifdef CONFIG_X86_IO_APIC
658 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
659 #endif
660
661 return gsi;
662 }
663
664 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
665 int trigger, int polarity) = acpi_register_gsi_pic;
666
667 #ifdef CONFIG_ACPI_SLEEP
668 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
669 #else
670 int (*acpi_suspend_lowlevel)(void);
671 #endif
672
673 /*
674 * success: return IRQ number (>=0)
675 * failure: return < 0
676 */
677 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
678 {
679 unsigned int plat_gsi;
680
681 plat_gsi = __acpi_register_gsi(dev, gsi, trigger, polarity);
682 if (plat_gsi != ACPI_INVALID_GSI)
683 return gsi_to_irq(plat_gsi);
684
685 return -1;
686 }
687 EXPORT_SYMBOL_GPL(acpi_register_gsi);
688
689 void acpi_unregister_gsi(u32 gsi)
690 {
691 }
692 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
693
694 static void __init acpi_set_irq_model_ioapic(void)
695 {
696 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
697 __acpi_register_gsi = acpi_register_gsi_ioapic;
698 acpi_ioapic = 1;
699 }
700
701 /*
702 * ACPI based hotplug support for CPU
703 */
704 #ifdef CONFIG_ACPI_HOTPLUG_CPU
705 #include <acpi/processor.h>
706
707 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
708 {
709 #ifdef CONFIG_ACPI_NUMA
710 int nid;
711
712 nid = acpi_get_node(handle);
713 if (nid != -1) {
714 set_apicid_to_node(physid, nid);
715 numa_set_node(cpu, nid);
716 }
717 #endif
718 }
719
720 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
721 {
722 int cpu;
723
724 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
725 if (cpu < 0) {
726 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
727 return cpu;
728 }
729
730 acpi_processor_set_pdc(handle);
731 acpi_map_cpu2node(handle, cpu, physid);
732
733 *pcpu = cpu;
734 return 0;
735 }
736
737 /* wrapper to silence section mismatch warning */
738 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
739 {
740 return _acpi_map_lsapic(handle, physid, pcpu);
741 }
742 EXPORT_SYMBOL(acpi_map_lsapic);
743
744 int acpi_unmap_lsapic(int cpu)
745 {
746 #ifdef CONFIG_ACPI_NUMA
747 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
748 #endif
749
750 per_cpu(x86_cpu_to_apicid, cpu) = -1;
751 set_cpu_present(cpu, false);
752 num_processors--;
753
754 return (0);
755 }
756
757 EXPORT_SYMBOL(acpi_unmap_lsapic);
758 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
759
760 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
761 {
762 /* TBD */
763 return -EINVAL;
764 }
765
766 EXPORT_SYMBOL(acpi_register_ioapic);
767
768 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
769 {
770 /* TBD */
771 return -EINVAL;
772 }
773
774 EXPORT_SYMBOL(acpi_unregister_ioapic);
775
776 static int __init acpi_parse_sbf(struct acpi_table_header *table)
777 {
778 struct acpi_table_boot *sb;
779
780 sb = (struct acpi_table_boot *)table;
781 if (!sb) {
782 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
783 return -ENODEV;
784 }
785
786 sbf_port = sb->cmos_index; /* Save CMOS port */
787
788 return 0;
789 }
790
791 #ifdef CONFIG_HPET_TIMER
792 #include <asm/hpet.h>
793
794 static struct resource *hpet_res __initdata;
795
796 static int __init acpi_parse_hpet(struct acpi_table_header *table)
797 {
798 struct acpi_table_hpet *hpet_tbl;
799
800 hpet_tbl = (struct acpi_table_hpet *)table;
801 if (!hpet_tbl) {
802 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
803 return -ENODEV;
804 }
805
806 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
807 printk(KERN_WARNING PREFIX "HPET timers must be located in "
808 "memory.\n");
809 return -1;
810 }
811
812 hpet_address = hpet_tbl->address.address;
813 hpet_blockid = hpet_tbl->sequence;
814
815 /*
816 * Some broken BIOSes advertise HPET at 0x0. We really do not
817 * want to allocate a resource there.
818 */
819 if (!hpet_address) {
820 printk(KERN_WARNING PREFIX
821 "HPET id: %#x base: %#lx is invalid\n",
822 hpet_tbl->id, hpet_address);
823 return 0;
824 }
825 #ifdef CONFIG_X86_64
826 /*
827 * Some even more broken BIOSes advertise HPET at
828 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
829 * some noise:
830 */
831 if (hpet_address == 0xfed0000000000000UL) {
832 if (!hpet_force_user) {
833 printk(KERN_WARNING PREFIX "HPET id: %#x "
834 "base: 0xfed0000000000000 is bogus\n "
835 "try hpet=force on the kernel command line to "
836 "fix it up to 0xfed00000.\n", hpet_tbl->id);
837 hpet_address = 0;
838 return 0;
839 }
840 printk(KERN_WARNING PREFIX
841 "HPET id: %#x base: 0xfed0000000000000 fixed up "
842 "to 0xfed00000.\n", hpet_tbl->id);
843 hpet_address >>= 32;
844 }
845 #endif
846 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
847 hpet_tbl->id, hpet_address);
848
849 /*
850 * Allocate and initialize the HPET firmware resource for adding into
851 * the resource tree during the lateinit timeframe.
852 */
853 #define HPET_RESOURCE_NAME_SIZE 9
854 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
855
856 hpet_res->name = (void *)&hpet_res[1];
857 hpet_res->flags = IORESOURCE_MEM;
858 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
859 hpet_tbl->sequence);
860
861 hpet_res->start = hpet_address;
862 hpet_res->end = hpet_address + (1 * 1024) - 1;
863
864 return 0;
865 }
866
867 /*
868 * hpet_insert_resource inserts the HPET resources used into the resource
869 * tree.
870 */
871 static __init int hpet_insert_resource(void)
872 {
873 if (!hpet_res)
874 return 1;
875
876 return insert_resource(&iomem_resource, hpet_res);
877 }
878
879 late_initcall(hpet_insert_resource);
880
881 #else
882 #define acpi_parse_hpet NULL
883 #endif
884
885 static int __init acpi_parse_fadt(struct acpi_table_header *table)
886 {
887
888 #ifdef CONFIG_X86_PM_TIMER
889 /* detect the location of the ACPI PM Timer */
890 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
891 /* FADT rev. 2 */
892 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
893 ACPI_ADR_SPACE_SYSTEM_IO)
894 return 0;
895
896 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
897 /*
898 * "X" fields are optional extensions to the original V1.0
899 * fields, so we must selectively expand V1.0 fields if the
900 * corresponding X field is zero.
901 */
902 if (!pmtmr_ioport)
903 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
904 } else {
905 /* FADT rev. 1 */
906 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
907 }
908 if (pmtmr_ioport)
909 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
910 pmtmr_ioport);
911 #endif
912 return 0;
913 }
914
915 #ifdef CONFIG_X86_LOCAL_APIC
916 /*
917 * Parse LAPIC entries in MADT
918 * returns 0 on success, < 0 on error
919 */
920
921 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
922 {
923 int count;
924
925 if (!cpu_has_apic)
926 return -ENODEV;
927
928 /*
929 * Note that the LAPIC address is obtained from the MADT (32-bit value)
930 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
931 */
932
933 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
934 acpi_parse_lapic_addr_ovr, 0);
935 if (count < 0) {
936 printk(KERN_ERR PREFIX
937 "Error parsing LAPIC address override entry\n");
938 return count;
939 }
940
941 register_lapic_address(acpi_lapic_addr);
942
943 return count;
944 }
945
946 static int __init acpi_parse_madt_lapic_entries(void)
947 {
948 int count;
949 int x2count = 0;
950
951 if (!cpu_has_apic)
952 return -ENODEV;
953
954 /*
955 * Note that the LAPIC address is obtained from the MADT (32-bit value)
956 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
957 */
958
959 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
960 acpi_parse_lapic_addr_ovr, 0);
961 if (count < 0) {
962 printk(KERN_ERR PREFIX
963 "Error parsing LAPIC address override entry\n");
964 return count;
965 }
966
967 register_lapic_address(acpi_lapic_addr);
968
969 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
970 acpi_parse_sapic, MAX_LOCAL_APIC);
971
972 if (!count) {
973 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
974 acpi_parse_x2apic, MAX_LOCAL_APIC);
975 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
976 acpi_parse_lapic, MAX_LOCAL_APIC);
977 }
978 if (!count && !x2count) {
979 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
980 /* TBD: Cleanup to allow fallback to MPS */
981 return -ENODEV;
982 } else if (count < 0 || x2count < 0) {
983 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
984 /* TBD: Cleanup to allow fallback to MPS */
985 return count;
986 }
987
988 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
989 acpi_parse_x2apic_nmi, 0);
990 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
991 acpi_parse_lapic_nmi, 0);
992 if (count < 0 || x2count < 0) {
993 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
994 /* TBD: Cleanup to allow fallback to MPS */
995 return count;
996 }
997 return 0;
998 }
999 #endif /* CONFIG_X86_LOCAL_APIC */
1000
1001 #ifdef CONFIG_X86_IO_APIC
1002 static void __init mp_config_acpi_legacy_irqs(void)
1003 {
1004 int i;
1005 struct mpc_intsrc mp_irq;
1006
1007 #ifdef CONFIG_EISA
1008 /*
1009 * Fabricate the legacy ISA bus (bus #31).
1010 */
1011 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1012 #endif
1013 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1014 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1015
1016 /*
1017 * Use the default configuration for the IRQs 0-15. Unless
1018 * overridden by (MADT) interrupt source override entries.
1019 */
1020 for (i = 0; i < NR_IRQS_LEGACY; i++) {
1021 int ioapic, pin;
1022 unsigned int dstapic;
1023 int idx;
1024 u32 gsi;
1025
1026 /* Locate the gsi that irq i maps to. */
1027 if (acpi_isa_irq_to_gsi(i, &gsi))
1028 continue;
1029
1030 /*
1031 * Locate the IOAPIC that manages the ISA IRQ.
1032 */
1033 ioapic = mp_find_ioapic(gsi);
1034 if (ioapic < 0)
1035 continue;
1036 pin = mp_find_ioapic_pin(ioapic, gsi);
1037 dstapic = mpc_ioapic_id(ioapic);
1038
1039 for (idx = 0; idx < mp_irq_entries; idx++) {
1040 struct mpc_intsrc *irq = mp_irqs + idx;
1041
1042 /* Do we already have a mapping for this ISA IRQ? */
1043 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1044 break;
1045
1046 /* Do we already have a mapping for this IOAPIC pin */
1047 if (irq->dstapic == dstapic && irq->dstirq == pin)
1048 break;
1049 }
1050
1051 if (idx != mp_irq_entries) {
1052 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1053 continue; /* IRQ already used */
1054 }
1055
1056 mp_irq.type = MP_INTSRC;
1057 mp_irq.irqflag = 0; /* Conforming */
1058 mp_irq.srcbus = MP_ISA_BUS;
1059 mp_irq.dstapic = dstapic;
1060 mp_irq.irqtype = mp_INT;
1061 mp_irq.srcbusirq = i; /* Identity mapped */
1062 mp_irq.dstirq = pin;
1063
1064 mp_save_irq(&mp_irq);
1065 }
1066 }
1067
1068 /*
1069 * Parse IOAPIC related entries in MADT
1070 * returns 0 on success, < 0 on error
1071 */
1072 static int __init acpi_parse_madt_ioapic_entries(void)
1073 {
1074 int count;
1075
1076 /*
1077 * ACPI interpreter is required to complete interrupt setup,
1078 * so if it is off, don't enumerate the io-apics with ACPI.
1079 * If MPS is present, it will handle them,
1080 * otherwise the system will stay in PIC mode
1081 */
1082 if (acpi_disabled || acpi_noirq)
1083 return -ENODEV;
1084
1085 if (!cpu_has_apic)
1086 return -ENODEV;
1087
1088 /*
1089 * if "noapic" boot option, don't look for IO-APICs
1090 */
1091 if (skip_ioapic_setup) {
1092 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1093 "due to 'noapic' option.\n");
1094 return -ENODEV;
1095 }
1096
1097 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1098 MAX_IO_APICS);
1099 if (!count) {
1100 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1101 return -ENODEV;
1102 } else if (count < 0) {
1103 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1104 return count;
1105 }
1106
1107 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1108 acpi_parse_int_src_ovr, nr_irqs);
1109 if (count < 0) {
1110 printk(KERN_ERR PREFIX
1111 "Error parsing interrupt source overrides entry\n");
1112 /* TBD: Cleanup to allow fallback to MPS */
1113 return count;
1114 }
1115
1116 /*
1117 * If BIOS did not supply an INT_SRC_OVR for the SCI
1118 * pretend we got one so we can set the SCI flags.
1119 */
1120 if (!acpi_sci_override_gsi)
1121 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1122 acpi_gbl_FADT.sci_interrupt);
1123
1124 /* Fill in identity legacy mappings where no override */
1125 mp_config_acpi_legacy_irqs();
1126
1127 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1128 acpi_parse_nmi_src, nr_irqs);
1129 if (count < 0) {
1130 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1131 /* TBD: Cleanup to allow fallback to MPS */
1132 return count;
1133 }
1134
1135 return 0;
1136 }
1137 #else
1138 static inline int acpi_parse_madt_ioapic_entries(void)
1139 {
1140 return -1;
1141 }
1142 #endif /* !CONFIG_X86_IO_APIC */
1143
1144 static void __init early_acpi_process_madt(void)
1145 {
1146 #ifdef CONFIG_X86_LOCAL_APIC
1147 int error;
1148
1149 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1150
1151 /*
1152 * Parse MADT LAPIC entries
1153 */
1154 error = early_acpi_parse_madt_lapic_addr_ovr();
1155 if (!error) {
1156 acpi_lapic = 1;
1157 smp_found_config = 1;
1158 }
1159 if (error == -EINVAL) {
1160 /*
1161 * Dell Precision Workstation 410, 610 come here.
1162 */
1163 printk(KERN_ERR PREFIX
1164 "Invalid BIOS MADT, disabling ACPI\n");
1165 disable_acpi();
1166 }
1167 }
1168 #endif
1169 }
1170
1171 static void __init acpi_process_madt(void)
1172 {
1173 #ifdef CONFIG_X86_LOCAL_APIC
1174 int error;
1175
1176 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1177
1178 /*
1179 * Parse MADT LAPIC entries
1180 */
1181 error = acpi_parse_madt_lapic_entries();
1182 if (!error) {
1183 acpi_lapic = 1;
1184
1185 /*
1186 * Parse MADT IO-APIC entries
1187 */
1188 error = acpi_parse_madt_ioapic_entries();
1189 if (!error) {
1190 acpi_set_irq_model_ioapic();
1191
1192 smp_found_config = 1;
1193 }
1194 }
1195 if (error == -EINVAL) {
1196 /*
1197 * Dell Precision Workstation 410, 610 come here.
1198 */
1199 printk(KERN_ERR PREFIX
1200 "Invalid BIOS MADT, disabling ACPI\n");
1201 disable_acpi();
1202 }
1203 } else {
1204 /*
1205 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1206 * In the event an MPS table was found, forget it.
1207 * Boot with "acpi=off" to use MPS on such a system.
1208 */
1209 if (smp_found_config) {
1210 printk(KERN_WARNING PREFIX
1211 "No APIC-table, disabling MPS\n");
1212 smp_found_config = 0;
1213 }
1214 }
1215
1216 /*
1217 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1218 * processors, where MPS only supports physical.
1219 */
1220 if (acpi_lapic && acpi_ioapic)
1221 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1222 "information\n");
1223 else if (acpi_lapic)
1224 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1225 "configuration information\n");
1226 #endif
1227 return;
1228 }
1229
1230 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1231 {
1232 if (!acpi_force) {
1233 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1234 d->ident);
1235 acpi_noirq_set();
1236 }
1237 return 0;
1238 }
1239
1240 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1241 {
1242 if (!acpi_force) {
1243 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1244 d->ident);
1245 acpi_disable_pci();
1246 }
1247 return 0;
1248 }
1249
1250 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1251 {
1252 if (!acpi_force) {
1253 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1254 disable_acpi();
1255 } else {
1256 printk(KERN_NOTICE
1257 "Warning: DMI blacklist says broken, but acpi forced\n");
1258 }
1259 return 0;
1260 }
1261
1262 /*
1263 * Force ignoring BIOS IRQ0 override
1264 */
1265 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1266 {
1267 if (!acpi_skip_timer_override) {
1268 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1269 d->ident);
1270 acpi_skip_timer_override = 1;
1271 }
1272 return 0;
1273 }
1274
1275 /*
1276 * If your system is blacklisted here, but you find that acpi=force
1277 * works for you, please contact linux-acpi@vger.kernel.org
1278 */
1279 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1280 /*
1281 * Boxes that need ACPI disabled
1282 */
1283 {
1284 .callback = dmi_disable_acpi,
1285 .ident = "IBM Thinkpad",
1286 .matches = {
1287 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1288 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1289 },
1290 },
1291
1292 /*
1293 * Boxes that need ACPI PCI IRQ routing disabled
1294 */
1295 {
1296 .callback = disable_acpi_irq,
1297 .ident = "ASUS A7V",
1298 .matches = {
1299 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1300 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1301 /* newer BIOS, Revision 1011, does work */
1302 DMI_MATCH(DMI_BIOS_VERSION,
1303 "ASUS A7V ACPI BIOS Revision 1007"),
1304 },
1305 },
1306 {
1307 /*
1308 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1309 * for LPC bridge, which is needed for the PCI
1310 * interrupt links to work. DSDT fix is in bug 5966.
1311 * 2645, 2646 model numbers are shared with 600/600E/600X
1312 */
1313 .callback = disable_acpi_irq,
1314 .ident = "IBM Thinkpad 600 Series 2645",
1315 .matches = {
1316 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1317 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1318 },
1319 },
1320 {
1321 .callback = disable_acpi_irq,
1322 .ident = "IBM Thinkpad 600 Series 2646",
1323 .matches = {
1324 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1325 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1326 },
1327 },
1328 /*
1329 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1330 */
1331 { /* _BBN 0 bug */
1332 .callback = disable_acpi_pci,
1333 .ident = "ASUS PR-DLS",
1334 .matches = {
1335 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1336 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1337 DMI_MATCH(DMI_BIOS_VERSION,
1338 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1339 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1340 },
1341 },
1342 {
1343 .callback = disable_acpi_pci,
1344 .ident = "Acer TravelMate 36x Laptop",
1345 .matches = {
1346 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1347 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1348 },
1349 },
1350 {}
1351 };
1352
1353 /* second table for DMI checks that should run after early-quirks */
1354 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1355 /*
1356 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1357 * which includes some code which overrides all temperature
1358 * trip points to 16C if the INTIN2 input of the I/O APIC
1359 * is enabled. This input is incorrectly designated the
1360 * ISA IRQ 0 via an interrupt source override even though
1361 * it is wired to the output of the master 8259A and INTIN0
1362 * is not connected at all. Force ignoring BIOS IRQ0
1363 * override in that cases.
1364 */
1365 {
1366 .callback = dmi_ignore_irq0_timer_override,
1367 .ident = "HP nx6115 laptop",
1368 .matches = {
1369 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1370 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1371 },
1372 },
1373 {
1374 .callback = dmi_ignore_irq0_timer_override,
1375 .ident = "HP NX6125 laptop",
1376 .matches = {
1377 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1378 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1379 },
1380 },
1381 {
1382 .callback = dmi_ignore_irq0_timer_override,
1383 .ident = "HP NX6325 laptop",
1384 .matches = {
1385 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1386 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1387 },
1388 },
1389 {
1390 .callback = dmi_ignore_irq0_timer_override,
1391 .ident = "HP 6715b laptop",
1392 .matches = {
1393 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1394 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1395 },
1396 },
1397 {
1398 .callback = dmi_ignore_irq0_timer_override,
1399 .ident = "FUJITSU SIEMENS",
1400 .matches = {
1401 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1402 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1403 },
1404 },
1405 {}
1406 };
1407
1408 /*
1409 * acpi_boot_table_init() and acpi_boot_init()
1410 * called from setup_arch(), always.
1411 * 1. checksums all tables
1412 * 2. enumerates lapics
1413 * 3. enumerates io-apics
1414 *
1415 * acpi_table_init() is separate to allow reading SRAT without
1416 * other side effects.
1417 *
1418 * side effects of acpi_boot_init:
1419 * acpi_lapic = 1 if LAPIC found
1420 * acpi_ioapic = 1 if IOAPIC found
1421 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1422 * if acpi_blacklisted() acpi_disabled = 1;
1423 * acpi_irq_model=...
1424 * ...
1425 */
1426
1427 void __init acpi_boot_table_init(void)
1428 {
1429 dmi_check_system(acpi_dmi_table);
1430
1431 /*
1432 * If acpi_disabled, bail out
1433 */
1434 if (acpi_disabled)
1435 return;
1436
1437 /*
1438 * Initialize the ACPI boot-time table parser.
1439 */
1440 if (acpi_table_init()) {
1441 disable_acpi();
1442 return;
1443 }
1444
1445 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1446
1447 /*
1448 * blacklist may disable ACPI entirely
1449 */
1450 if (acpi_blacklisted()) {
1451 if (acpi_force) {
1452 printk(KERN_WARNING PREFIX "acpi=force override\n");
1453 } else {
1454 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1455 disable_acpi();
1456 return;
1457 }
1458 }
1459 }
1460
1461 int __init early_acpi_boot_init(void)
1462 {
1463 /*
1464 * If acpi_disabled, bail out
1465 */
1466 if (acpi_disabled)
1467 return 1;
1468
1469 /*
1470 * Process the Multiple APIC Description Table (MADT), if present
1471 */
1472 early_acpi_process_madt();
1473
1474 return 0;
1475 }
1476
1477 int __init acpi_boot_init(void)
1478 {
1479 /* those are executed after early-quirks are executed */
1480 dmi_check_system(acpi_dmi_table_late);
1481
1482 /*
1483 * If acpi_disabled, bail out
1484 */
1485 if (acpi_disabled)
1486 return 1;
1487
1488 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1489
1490 /*
1491 * set sci_int and PM timer address
1492 */
1493 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1494
1495 /*
1496 * Process the Multiple APIC Description Table (MADT), if present
1497 */
1498 acpi_process_madt();
1499
1500 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1501
1502 if (!acpi_noirq)
1503 x86_init.pci.init = pci_acpi_init;
1504
1505 return 0;
1506 }
1507
1508 static int __init parse_acpi(char *arg)
1509 {
1510 if (!arg)
1511 return -EINVAL;
1512
1513 /* "acpi=off" disables both ACPI table parsing and interpreter */
1514 if (strcmp(arg, "off") == 0) {
1515 disable_acpi();
1516 }
1517 /* acpi=force to over-ride black-list */
1518 else if (strcmp(arg, "force") == 0) {
1519 acpi_force = 1;
1520 acpi_disabled = 0;
1521 }
1522 /* acpi=strict disables out-of-spec workarounds */
1523 else if (strcmp(arg, "strict") == 0) {
1524 acpi_strict = 1;
1525 }
1526 /* acpi=rsdt use RSDT instead of XSDT */
1527 else if (strcmp(arg, "rsdt") == 0) {
1528 acpi_gbl_do_not_use_xsdt = TRUE;
1529 }
1530 /* "acpi=noirq" disables ACPI interrupt routing */
1531 else if (strcmp(arg, "noirq") == 0) {
1532 acpi_noirq_set();
1533 }
1534 /* "acpi=copy_dsdt" copys DSDT */
1535 else if (strcmp(arg, "copy_dsdt") == 0) {
1536 acpi_gbl_copy_dsdt_locally = 1;
1537 }
1538 /* "acpi=nocmcff" disables FF mode for corrected errors */
1539 else if (strcmp(arg, "nocmcff") == 0) {
1540 acpi_disable_cmcff = 1;
1541 } else {
1542 /* Core will printk when we return error. */
1543 return -EINVAL;
1544 }
1545 return 0;
1546 }
1547 early_param("acpi", parse_acpi);
1548
1549 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1550 static int __init parse_pci(char *arg)
1551 {
1552 if (arg && strcmp(arg, "noacpi") == 0)
1553 acpi_disable_pci();
1554 return 0;
1555 }
1556 early_param("pci", parse_pci);
1557
1558 int __init acpi_mps_check(void)
1559 {
1560 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1561 /* mptable code is not built-in*/
1562 if (acpi_disabled || acpi_noirq) {
1563 printk(KERN_WARNING "MPS support code is not built-in.\n"
1564 "Using acpi=off or acpi=noirq or pci=noacpi "
1565 "may have problem\n");
1566 return 1;
1567 }
1568 #endif
1569 return 0;
1570 }
1571
1572 #ifdef CONFIG_X86_IO_APIC
1573 static int __init parse_acpi_skip_timer_override(char *arg)
1574 {
1575 acpi_skip_timer_override = 1;
1576 return 0;
1577 }
1578 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1579
1580 static int __init parse_acpi_use_timer_override(char *arg)
1581 {
1582 acpi_use_timer_override = 1;
1583 return 0;
1584 }
1585 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1586 #endif /* CONFIG_X86_IO_APIC */
1587
1588 static int __init setup_acpi_sci(char *s)
1589 {
1590 if (!s)
1591 return -EINVAL;
1592 if (!strcmp(s, "edge"))
1593 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1594 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1595 else if (!strcmp(s, "level"))
1596 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1597 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1598 else if (!strcmp(s, "high"))
1599 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1600 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1601 else if (!strcmp(s, "low"))
1602 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1603 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1604 else
1605 return -EINVAL;
1606 return 0;
1607 }
1608 early_param("acpi_sci", setup_acpi_sci);
1609
1610 int __acpi_acquire_global_lock(unsigned int *lock)
1611 {
1612 unsigned int old, new, val;
1613 do {
1614 old = *lock;
1615 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1616 val = cmpxchg(lock, old, new);
1617 } while (unlikely (val != old));
1618 return (new < 3) ? -1 : 0;
1619 }
1620
1621 int __acpi_release_global_lock(unsigned int *lock)
1622 {
1623 unsigned int old, new, val;
1624 do {
1625 old = *lock;
1626 new = old & ~0x3;
1627 val = cmpxchg(lock, old, new);
1628 } while (unlikely (val != old));
1629 return old & 0x1;
1630 }
1631
1632 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1633 {
1634 e820_add_region(addr, size, E820_ACPI);
1635 update_e820();
1636 }
Linux kernel - Deliverables
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