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target/cxgbit: Use T6 specific macros to get ETH/IP hdr len
[linux/fpc-iii.git] / arch / x86 / kernel / acpi / boot.c
blob64422f850e95e2da7991ded073041f5df5b4dfae
1 /*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/export.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38
39 #include <asm/irqdomain.h>
40 #include <asm/pci_x86.h>
41 #include <asm/pgtable.h>
42 #include <asm/io_apic.h>
43 #include <asm/apic.h>
44 #include <asm/io.h>
45 #include <asm/mpspec.h>
46 #include <asm/smp.h>
47 #include <asm/i8259.h>
48
49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50 static int __initdata acpi_force = 0;
51 int acpi_disabled;
52 EXPORT_SYMBOL(acpi_disabled);
53
54 #ifdef CONFIG_X86_64
55 # include <asm/proto.h>
56 #endif /* X86 */
57
58 #define PREFIX "ACPI: "
59
60 int acpi_noirq; /* skip ACPI IRQ initialization */
61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
62 EXPORT_SYMBOL(acpi_pci_disabled);
63
64 int acpi_lapic;
65 int acpi_ioapic;
66 int acpi_strict;
67 int acpi_disable_cmcff;
68
69 u8 acpi_sci_flags __initdata;
70 int acpi_sci_override_gsi __initdata;
71 int acpi_skip_timer_override __initdata;
72 int acpi_use_timer_override __initdata;
73 int acpi_fix_pin2_polarity __initdata;
74
75 #ifdef CONFIG_X86_LOCAL_APIC
76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
77 #endif
78
79 #ifdef CONFIG_X86_IO_APIC
80 /*
81 * Locks related to IOAPIC hotplug
82 * Hotplug side:
83 * ->device_hotplug_lock
84 * ->acpi_ioapic_lock
85 * ->ioapic_lock
86 * Interrupt mapping side:
87 * ->acpi_ioapic_lock
88 * ->ioapic_mutex
89 * ->ioapic_lock
90 */
91 static DEFINE_MUTEX(acpi_ioapic_lock);
92 #endif
93
94 /* --------------------------------------------------------------------------
95 Boot-time Configuration
96 -------------------------------------------------------------------------- */
97
98 /*
99 * The default interrupt routing model is PIC (8259). This gets
100 * overridden if IOAPICs are enumerated (below).
101 */
102 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
103
104
105 /*
106 * ISA irqs by default are the first 16 gsis but can be
107 * any gsi as specified by an interrupt source override.
108 */
109 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
110 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
111 };
112
113 #define ACPI_INVALID_GSI INT_MIN
114
115 /*
116 * This is just a simple wrapper around early_ioremap(),
117 * with sanity checks for phys == 0 and size == 0.
118 */
119 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
120 {
121
122 if (!phys || !size)
123 return NULL;
124
125 return early_ioremap(phys, size);
126 }
127
128 void __init __acpi_unmap_table(char *map, unsigned long size)
129 {
130 if (!map || !size)
131 return;
132
133 early_iounmap(map, size);
134 }
135
136 #ifdef CONFIG_X86_LOCAL_APIC
137 static int __init acpi_parse_madt(struct acpi_table_header *table)
138 {
139 struct acpi_table_madt *madt = NULL;
140
141 if (!boot_cpu_has(X86_FEATURE_APIC))
142 return -EINVAL;
143
144 madt = (struct acpi_table_madt *)table;
145 if (!madt) {
146 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
147 return -ENODEV;
148 }
149
150 if (madt->address) {
151 acpi_lapic_addr = (u64) madt->address;
152
153 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
154 madt->address);
155 }
156
157 default_acpi_madt_oem_check(madt->header.oem_id,
158 madt->header.oem_table_id);
159
160 return 0;
161 }
162
163 /**
164 * acpi_register_lapic - register a local apic and generates a logic cpu number
165 * @id: local apic id to register
166 * @acpiid: ACPI id to register
167 * @enabled: this cpu is enabled or not
168 *
169 * Returns the logic cpu number which maps to the local apic
170 */
171 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
172 {
173 unsigned int ver = 0;
174 int cpu;
175
176 if (id >= MAX_LOCAL_APIC) {
177 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
178 return -EINVAL;
179 }
180
181 if (boot_cpu_physical_apicid != -1U)
182 ver = boot_cpu_apic_version;
183
184 cpu = __generic_processor_info(id, ver, enabled);
185 if (cpu >= 0)
186 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
187
188 return cpu;
189 }
190
191 static int __init
192 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
193 {
194 struct acpi_madt_local_x2apic *processor = NULL;
195 int apic_id;
196 u8 enabled;
197
198 processor = (struct acpi_madt_local_x2apic *)header;
199
200 if (BAD_MADT_ENTRY(processor, end))
201 return -EINVAL;
202
203 acpi_table_print_madt_entry(header);
204
205 apic_id = processor->local_apic_id;
206 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
207 #ifdef CONFIG_X86_X2APIC
208 /*
209 * We need to register disabled CPU as well to permit
210 * counting disabled CPUs. This allows us to size
211 * cpus_possible_map more accurately, to permit
212 * to not preallocating memory for all NR_CPUS
213 * when we use CPU hotplug.
214 */
215 if (!apic->apic_id_valid(apic_id) && enabled)
216 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
217 else
218 acpi_register_lapic(apic_id, processor->uid, enabled);
219 #else
220 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
221 #endif
222
223 return 0;
224 }
225
226 static int __init
227 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
228 {
229 struct acpi_madt_local_apic *processor = NULL;
230
231 processor = (struct acpi_madt_local_apic *)header;
232
233 if (BAD_MADT_ENTRY(processor, end))
234 return -EINVAL;
235
236 acpi_table_print_madt_entry(header);
237
238 /* Ignore invalid ID */
239 if (processor->id == 0xff)
240 return 0;
241
242 /*
243 * We need to register disabled CPU as well to permit
244 * counting disabled CPUs. This allows us to size
245 * cpus_possible_map more accurately, to permit
246 * to not preallocating memory for all NR_CPUS
247 * when we use CPU hotplug.
248 */
249 acpi_register_lapic(processor->id, /* APIC ID */
250 processor->processor_id, /* ACPI ID */
251 processor->lapic_flags & ACPI_MADT_ENABLED);
252
253 return 0;
254 }
255
256 static int __init
257 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
258 {
259 struct acpi_madt_local_sapic *processor = NULL;
260
261 processor = (struct acpi_madt_local_sapic *)header;
262
263 if (BAD_MADT_ENTRY(processor, end))
264 return -EINVAL;
265
266 acpi_table_print_madt_entry(header);
267
268 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
269 processor->processor_id, /* ACPI ID */
270 processor->lapic_flags & ACPI_MADT_ENABLED);
271
272 return 0;
273 }
274
275 static int __init
276 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
277 const unsigned long end)
278 {
279 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
280
281 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
282
283 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
284 return -EINVAL;
285
286 acpi_table_print_madt_entry(header);
287
288 acpi_lapic_addr = lapic_addr_ovr->address;
289
290 return 0;
291 }
292
293 static int __init
294 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
295 const unsigned long end)
296 {
297 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
298
299 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
300
301 if (BAD_MADT_ENTRY(x2apic_nmi, end))
302 return -EINVAL;
303
304 acpi_table_print_madt_entry(header);
305
306 if (x2apic_nmi->lint != 1)
307 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
308
309 return 0;
310 }
311
312 static int __init
313 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
314 {
315 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
316
317 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
318
319 if (BAD_MADT_ENTRY(lapic_nmi, end))
320 return -EINVAL;
321
322 acpi_table_print_madt_entry(header);
323
324 if (lapic_nmi->lint != 1)
325 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
326
327 return 0;
328 }
329
330 #endif /*CONFIG_X86_LOCAL_APIC */
331
332 #ifdef CONFIG_X86_IO_APIC
333 #define MP_ISA_BUS 0
334
335 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
336 u32 gsi)
337 {
338 int ioapic;
339 int pin;
340 struct mpc_intsrc mp_irq;
341
342 /*
343 * Convert 'gsi' to 'ioapic.pin'.
344 */
345 ioapic = mp_find_ioapic(gsi);
346 if (ioapic < 0)
347 return;
348 pin = mp_find_ioapic_pin(ioapic, gsi);
349
350 /*
351 * TBD: This check is for faulty timer entries, where the override
352 * erroneously sets the trigger to level, resulting in a HUGE
353 * increase of timer interrupts!
354 */
355 if ((bus_irq == 0) && (trigger == 3))
356 trigger = 1;
357
358 mp_irq.type = MP_INTSRC;
359 mp_irq.irqtype = mp_INT;
360 mp_irq.irqflag = (trigger << 2) | polarity;
361 mp_irq.srcbus = MP_ISA_BUS;
362 mp_irq.srcbusirq = bus_irq; /* IRQ */
363 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
364 mp_irq.dstirq = pin; /* INTIN# */
365
366 mp_save_irq(&mp_irq);
367
368 /*
369 * Reset default identity mapping if gsi is also an legacy IRQ,
370 * otherwise there will be more than one entry with the same GSI
371 * and acpi_isa_irq_to_gsi() may give wrong result.
372 */
373 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
374 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
375 isa_irq_to_gsi[bus_irq] = gsi;
376 }
377
378 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
379 int polarity)
380 {
381 #ifdef CONFIG_X86_MPPARSE
382 struct mpc_intsrc mp_irq;
383 struct pci_dev *pdev;
384 unsigned char number;
385 unsigned int devfn;
386 int ioapic;
387 u8 pin;
388
389 if (!acpi_ioapic)
390 return 0;
391 if (!dev || !dev_is_pci(dev))
392 return 0;
393
394 pdev = to_pci_dev(dev);
395 number = pdev->bus->number;
396 devfn = pdev->devfn;
397 pin = pdev->pin;
398 /* print the entry should happen on mptable identically */
399 mp_irq.type = MP_INTSRC;
400 mp_irq.irqtype = mp_INT;
401 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
402 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
403 mp_irq.srcbus = number;
404 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
405 ioapic = mp_find_ioapic(gsi);
406 mp_irq.dstapic = mpc_ioapic_id(ioapic);
407 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
408
409 mp_save_irq(&mp_irq);
410 #endif
411 return 0;
412 }
413
414 static int __init
415 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
416 {
417 struct acpi_madt_io_apic *ioapic = NULL;
418 struct ioapic_domain_cfg cfg = {
419 .type = IOAPIC_DOMAIN_DYNAMIC,
420 .ops = &mp_ioapic_irqdomain_ops,
421 };
422
423 ioapic = (struct acpi_madt_io_apic *)header;
424
425 if (BAD_MADT_ENTRY(ioapic, end))
426 return -EINVAL;
427
428 acpi_table_print_madt_entry(header);
429
430 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
431 if (ioapic->global_irq_base < nr_legacy_irqs())
432 cfg.type = IOAPIC_DOMAIN_LEGACY;
433
434 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
435 &cfg);
436
437 return 0;
438 }
439
440 /*
441 * Parse Interrupt Source Override for the ACPI SCI
442 */
443 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
444 {
445 if (trigger == 0) /* compatible SCI trigger is level */
446 trigger = 3;
447
448 if (polarity == 0) /* compatible SCI polarity is low */
449 polarity = 3;
450
451 /* Command-line over-ride via acpi_sci= */
452 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
453 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
454
455 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
456 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
457
458 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
459 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
460
461 /*
462 * stash over-ride to indicate we've been here
463 * and for later update of acpi_gbl_FADT
464 */
465 acpi_sci_override_gsi = gsi;
466 return;
467 }
468
469 static int __init
470 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
471 const unsigned long end)
472 {
473 struct acpi_madt_interrupt_override *intsrc = NULL;
474
475 intsrc = (struct acpi_madt_interrupt_override *)header;
476
477 if (BAD_MADT_ENTRY(intsrc, end))
478 return -EINVAL;
479
480 acpi_table_print_madt_entry(header);
481
482 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
483 acpi_sci_ioapic_setup(intsrc->source_irq,
484 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
485 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
486 intsrc->global_irq);
487 return 0;
488 }
489
490 if (intsrc->source_irq == 0) {
491 if (acpi_skip_timer_override) {
492 printk(PREFIX "BIOS IRQ0 override ignored.\n");
493 return 0;
494 }
495
496 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
497 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
498 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
499 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
500 }
501 }
502
503 mp_override_legacy_irq(intsrc->source_irq,
504 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
505 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
506 intsrc->global_irq);
507
508 return 0;
509 }
510
511 static int __init
512 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
513 {
514 struct acpi_madt_nmi_source *nmi_src = NULL;
515
516 nmi_src = (struct acpi_madt_nmi_source *)header;
517
518 if (BAD_MADT_ENTRY(nmi_src, end))
519 return -EINVAL;
520
521 acpi_table_print_madt_entry(header);
522
523 /* TBD: Support nimsrc entries? */
524
525 return 0;
526 }
527
528 #endif /* CONFIG_X86_IO_APIC */
529
530 /*
531 * acpi_pic_sci_set_trigger()
532 *
533 * use ELCR to set PIC-mode trigger type for SCI
534 *
535 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
536 * it may require Edge Trigger -- use "acpi_sci=edge"
537 *
538 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
539 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
540 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
541 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
542 */
543
544 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
545 {
546 unsigned int mask = 1 << irq;
547 unsigned int old, new;
548
549 /* Real old ELCR mask */
550 old = inb(0x4d0) | (inb(0x4d1) << 8);
551
552 /*
553 * If we use ACPI to set PCI IRQs, then we should clear ELCR
554 * since we will set it correctly as we enable the PCI irq
555 * routing.
556 */
557 new = acpi_noirq ? old : 0;
558
559 /*
560 * Update SCI information in the ELCR, it isn't in the PCI
561 * routing tables..
562 */
563 switch (trigger) {
564 case 1: /* Edge - clear */
565 new &= ~mask;
566 break;
567 case 3: /* Level - set */
568 new |= mask;
569 break;
570 }
571
572 if (old == new)
573 return;
574
575 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
576 outb(new, 0x4d0);
577 outb(new >> 8, 0x4d1);
578 }
579
580 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
581 {
582 int rc, irq, trigger, polarity;
583
584 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
585 *irqp = gsi;
586 return 0;
587 }
588
589 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
590 if (rc == 0) {
591 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
592 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
593 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
594 if (irq >= 0) {
595 *irqp = irq;
596 return 0;
597 }
598 }
599
600 return -1;
601 }
602 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
603
604 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
605 {
606 if (isa_irq < nr_legacy_irqs() &&
607 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
608 *gsi = isa_irq_to_gsi[isa_irq];
609 return 0;
610 }
611
612 return -1;
613 }
614
615 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
616 int trigger, int polarity)
617 {
618 #ifdef CONFIG_PCI
619 /*
620 * Make sure all (legacy) PCI IRQs are set as level-triggered.
621 */
622 if (trigger == ACPI_LEVEL_SENSITIVE)
623 elcr_set_level_irq(gsi);
624 #endif
625
626 return gsi;
627 }
628
629 #ifdef CONFIG_X86_LOCAL_APIC
630 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
631 int trigger, int polarity)
632 {
633 int irq = gsi;
634 #ifdef CONFIG_X86_IO_APIC
635 int node;
636 struct irq_alloc_info info;
637
638 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
639 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
640 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
641 ioapic_set_alloc_attr(&info, node, trigger, polarity);
642
643 mutex_lock(&acpi_ioapic_lock);
644 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
645 /* Don't set up the ACPI SCI because it's already set up */
646 if (irq >= 0 && enable_update_mptable &&
647 acpi_gbl_FADT.sci_interrupt != gsi)
648 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
649 mutex_unlock(&acpi_ioapic_lock);
650 #endif
651
652 return irq;
653 }
654
655 static void acpi_unregister_gsi_ioapic(u32 gsi)
656 {
657 #ifdef CONFIG_X86_IO_APIC
658 int irq;
659
660 mutex_lock(&acpi_ioapic_lock);
661 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
662 if (irq > 0)
663 mp_unmap_irq(irq);
664 mutex_unlock(&acpi_ioapic_lock);
665 #endif
666 }
667 #endif
668
669 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
670 int trigger, int polarity) = acpi_register_gsi_pic;
671 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
672
673 #ifdef CONFIG_ACPI_SLEEP
674 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
675 #else
676 int (*acpi_suspend_lowlevel)(void);
677 #endif
678
679 /*
680 * success: return IRQ number (>=0)
681 * failure: return < 0
682 */
683 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
684 {
685 return __acpi_register_gsi(dev, gsi, trigger, polarity);
686 }
687 EXPORT_SYMBOL_GPL(acpi_register_gsi);
688
689 void acpi_unregister_gsi(u32 gsi)
690 {
691 if (__acpi_unregister_gsi)
692 __acpi_unregister_gsi(gsi);
693 }
694 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
695
696 #ifdef CONFIG_X86_LOCAL_APIC
697 static void __init acpi_set_irq_model_ioapic(void)
698 {
699 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
700 __acpi_register_gsi = acpi_register_gsi_ioapic;
701 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
702 acpi_ioapic = 1;
703 }
704 #endif
705
706 /*
707 * ACPI based hotplug support for CPU
708 */
709 #ifdef CONFIG_ACPI_HOTPLUG_CPU
710 #include <acpi/processor.h>
711
712 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
713 {
714 #ifdef CONFIG_ACPI_NUMA
715 int nid;
716
717 nid = acpi_get_node(handle);
718 if (nid != NUMA_NO_NODE) {
719 set_apicid_to_node(physid, nid);
720 numa_set_node(cpu, nid);
721 }
722 #endif
723 return 0;
724 }
725
726 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
727 {
728 int cpu;
729
730 cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
731 if (cpu < 0) {
732 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
733 return cpu;
734 }
735
736 acpi_processor_set_pdc(handle);
737 acpi_map_cpu2node(handle, cpu, physid);
738
739 *pcpu = cpu;
740 return 0;
741 }
742 EXPORT_SYMBOL(acpi_map_cpu);
743
744 int acpi_unmap_cpu(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 EXPORT_SYMBOL(acpi_unmap_cpu);
757 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
758
759 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
760 {
761 int ret = -ENOSYS;
762 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
763 int ioapic_id;
764 u64 addr;
765 struct ioapic_domain_cfg cfg = {
766 .type = IOAPIC_DOMAIN_DYNAMIC,
767 .ops = &mp_ioapic_irqdomain_ops,
768 };
769
770 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
771 if (ioapic_id < 0) {
772 unsigned long long uid;
773 acpi_status status;
774
775 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
776 NULL, &uid);
777 if (ACPI_FAILURE(status)) {
778 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
779 return -EINVAL;
780 }
781 ioapic_id = (int)uid;
782 }
783
784 mutex_lock(&acpi_ioapic_lock);
785 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
786 mutex_unlock(&acpi_ioapic_lock);
787 #endif
788
789 return ret;
790 }
791 EXPORT_SYMBOL(acpi_register_ioapic);
792
793 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
794 {
795 int ret = -ENOSYS;
796
797 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
798 mutex_lock(&acpi_ioapic_lock);
799 ret = mp_unregister_ioapic(gsi_base);
800 mutex_unlock(&acpi_ioapic_lock);
801 #endif
802
803 return ret;
804 }
805 EXPORT_SYMBOL(acpi_unregister_ioapic);
806
807 /**
808 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
809 * has been registered
810 * @handle: ACPI handle of the IOAPIC deivce
811 * @gsi_base: GSI base associated with the IOAPIC
812 *
813 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
814 * with acpi_register_ioapic()/acpi_unregister_ioapic().
815 */
816 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
817 {
818 int ret = 0;
819
820 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
821 mutex_lock(&acpi_ioapic_lock);
822 ret = mp_ioapic_registered(gsi_base);
823 mutex_unlock(&acpi_ioapic_lock);
824 #endif
825
826 return ret;
827 }
828
829 static int __init acpi_parse_sbf(struct acpi_table_header *table)
830 {
831 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
832
833 sbf_port = sb->cmos_index; /* Save CMOS port */
834
835 return 0;
836 }
837
838 #ifdef CONFIG_HPET_TIMER
839 #include <asm/hpet.h>
840
841 static struct resource *hpet_res __initdata;
842
843 static int __init acpi_parse_hpet(struct acpi_table_header *table)
844 {
845 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
846
847 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
848 printk(KERN_WARNING PREFIX "HPET timers must be located in "
849 "memory.\n");
850 return -1;
851 }
852
853 hpet_address = hpet_tbl->address.address;
854 hpet_blockid = hpet_tbl->sequence;
855
856 /*
857 * Some broken BIOSes advertise HPET at 0x0. We really do not
858 * want to allocate a resource there.
859 */
860 if (!hpet_address) {
861 printk(KERN_WARNING PREFIX
862 "HPET id: %#x base: %#lx is invalid\n",
863 hpet_tbl->id, hpet_address);
864 return 0;
865 }
866 #ifdef CONFIG_X86_64
867 /*
868 * Some even more broken BIOSes advertise HPET at
869 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
870 * some noise:
871 */
872 if (hpet_address == 0xfed0000000000000UL) {
873 if (!hpet_force_user) {
874 printk(KERN_WARNING PREFIX "HPET id: %#x "
875 "base: 0xfed0000000000000 is bogus\n "
876 "try hpet=force on the kernel command line to "
877 "fix it up to 0xfed00000.\n", hpet_tbl->id);
878 hpet_address = 0;
879 return 0;
880 }
881 printk(KERN_WARNING PREFIX
882 "HPET id: %#x base: 0xfed0000000000000 fixed up "
883 "to 0xfed00000.\n", hpet_tbl->id);
884 hpet_address >>= 32;
885 }
886 #endif
887 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
888 hpet_tbl->id, hpet_address);
889
890 /*
891 * Allocate and initialize the HPET firmware resource for adding into
892 * the resource tree during the lateinit timeframe.
893 */
894 #define HPET_RESOURCE_NAME_SIZE 9
895 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
896
897 hpet_res->name = (void *)&hpet_res[1];
898 hpet_res->flags = IORESOURCE_MEM;
899 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
900 hpet_tbl->sequence);
901
902 hpet_res->start = hpet_address;
903 hpet_res->end = hpet_address + (1 * 1024) - 1;
904
905 return 0;
906 }
907
908 /*
909 * hpet_insert_resource inserts the HPET resources used into the resource
910 * tree.
911 */
912 static __init int hpet_insert_resource(void)
913 {
914 if (!hpet_res)
915 return 1;
916
917 return insert_resource(&iomem_resource, hpet_res);
918 }
919
920 late_initcall(hpet_insert_resource);
921
922 #else
923 #define acpi_parse_hpet NULL
924 #endif
925
926 static int __init acpi_parse_fadt(struct acpi_table_header *table)
927 {
928 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
929 pr_debug("ACPI: no legacy devices present\n");
930 x86_platform.legacy.devices.pnpbios = 0;
931 }
932
933 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
934 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
935 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
936 pr_debug("ACPI: i8042 controller is absent\n");
937 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
938 }
939
940 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
941 pr_debug("ACPI: not registering RTC platform device\n");
942 x86_platform.legacy.rtc = 0;
943 }
944
945 #ifdef CONFIG_X86_PM_TIMER
946 /* detect the location of the ACPI PM Timer */
947 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
948 /* FADT rev. 2 */
949 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
950 ACPI_ADR_SPACE_SYSTEM_IO)
951 return 0;
952
953 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
954 /*
955 * "X" fields are optional extensions to the original V1.0
956 * fields, so we must selectively expand V1.0 fields if the
957 * corresponding X field is zero.
958 */
959 if (!pmtmr_ioport)
960 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
961 } else {
962 /* FADT rev. 1 */
963 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
964 }
965 if (pmtmr_ioport)
966 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
967 pmtmr_ioport);
968 #endif
969 return 0;
970 }
971
972 #ifdef CONFIG_X86_LOCAL_APIC
973 /*
974 * Parse LAPIC entries in MADT
975 * returns 0 on success, < 0 on error
976 */
977
978 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
979 {
980 int count;
981
982 if (!boot_cpu_has(X86_FEATURE_APIC))
983 return -ENODEV;
984
985 /*
986 * Note that the LAPIC address is obtained from the MADT (32-bit value)
987 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
988 */
989
990 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
991 acpi_parse_lapic_addr_ovr, 0);
992 if (count < 0) {
993 printk(KERN_ERR PREFIX
994 "Error parsing LAPIC address override entry\n");
995 return count;
996 }
997
998 register_lapic_address(acpi_lapic_addr);
999
1000 return count;
1001 }
1002
1003 static int __init acpi_parse_madt_lapic_entries(void)
1004 {
1005 int count;
1006 int x2count = 0;
1007 int ret;
1008 struct acpi_subtable_proc madt_proc[2];
1009
1010 if (!boot_cpu_has(X86_FEATURE_APIC))
1011 return -ENODEV;
1012
1013 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1014 acpi_parse_sapic, MAX_LOCAL_APIC);
1015
1016 if (!count) {
1017 memset(madt_proc, 0, sizeof(madt_proc));
1018 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1019 madt_proc[0].handler = acpi_parse_lapic;
1020 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1021 madt_proc[1].handler = acpi_parse_x2apic;
1022 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1023 sizeof(struct acpi_table_madt),
1024 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1025 if (ret < 0) {
1026 printk(KERN_ERR PREFIX
1027 "Error parsing LAPIC/X2APIC entries\n");
1028 return ret;
1029 }
1030
1031 count = madt_proc[0].count;
1032 x2count = madt_proc[1].count;
1033 }
1034 if (!count && !x2count) {
1035 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1036 /* TBD: Cleanup to allow fallback to MPS */
1037 return -ENODEV;
1038 } else if (count < 0 || x2count < 0) {
1039 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1040 /* TBD: Cleanup to allow fallback to MPS */
1041 return count;
1042 }
1043
1044 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1045 acpi_parse_x2apic_nmi, 0);
1046 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1047 acpi_parse_lapic_nmi, 0);
1048 if (count < 0 || x2count < 0) {
1049 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1050 /* TBD: Cleanup to allow fallback to MPS */
1051 return count;
1052 }
1053 return 0;
1054 }
1055 #endif /* CONFIG_X86_LOCAL_APIC */
1056
1057 #ifdef CONFIG_X86_IO_APIC
1058 static void __init mp_config_acpi_legacy_irqs(void)
1059 {
1060 int i;
1061 struct mpc_intsrc mp_irq;
1062
1063 #ifdef CONFIG_EISA
1064 /*
1065 * Fabricate the legacy ISA bus (bus #31).
1066 */
1067 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1068 #endif
1069 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1070 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1071
1072 /*
1073 * Use the default configuration for the IRQs 0-15. Unless
1074 * overridden by (MADT) interrupt source override entries.
1075 */
1076 for (i = 0; i < nr_legacy_irqs(); i++) {
1077 int ioapic, pin;
1078 unsigned int dstapic;
1079 int idx;
1080 u32 gsi;
1081
1082 /* Locate the gsi that irq i maps to. */
1083 if (acpi_isa_irq_to_gsi(i, &gsi))
1084 continue;
1085
1086 /*
1087 * Locate the IOAPIC that manages the ISA IRQ.
1088 */
1089 ioapic = mp_find_ioapic(gsi);
1090 if (ioapic < 0)
1091 continue;
1092 pin = mp_find_ioapic_pin(ioapic, gsi);
1093 dstapic = mpc_ioapic_id(ioapic);
1094
1095 for (idx = 0; idx < mp_irq_entries; idx++) {
1096 struct mpc_intsrc *irq = mp_irqs + idx;
1097
1098 /* Do we already have a mapping for this ISA IRQ? */
1099 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1100 break;
1101
1102 /* Do we already have a mapping for this IOAPIC pin */
1103 if (irq->dstapic == dstapic && irq->dstirq == pin)
1104 break;
1105 }
1106
1107 if (idx != mp_irq_entries) {
1108 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1109 continue; /* IRQ already used */
1110 }
1111
1112 mp_irq.type = MP_INTSRC;
1113 mp_irq.irqflag = 0; /* Conforming */
1114 mp_irq.srcbus = MP_ISA_BUS;
1115 mp_irq.dstapic = dstapic;
1116 mp_irq.irqtype = mp_INT;
1117 mp_irq.srcbusirq = i; /* Identity mapped */
1118 mp_irq.dstirq = pin;
1119
1120 mp_save_irq(&mp_irq);
1121 }
1122 }
1123
1124 /*
1125 * Parse IOAPIC related entries in MADT
1126 * returns 0 on success, < 0 on error
1127 */
1128 static int __init acpi_parse_madt_ioapic_entries(void)
1129 {
1130 int count;
1131
1132 /*
1133 * ACPI interpreter is required to complete interrupt setup,
1134 * so if it is off, don't enumerate the io-apics with ACPI.
1135 * If MPS is present, it will handle them,
1136 * otherwise the system will stay in PIC mode
1137 */
1138 if (acpi_disabled || acpi_noirq)
1139 return -ENODEV;
1140
1141 if (!boot_cpu_has(X86_FEATURE_APIC))
1142 return -ENODEV;
1143
1144 /*
1145 * if "noapic" boot option, don't look for IO-APICs
1146 */
1147 if (skip_ioapic_setup) {
1148 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1149 "due to 'noapic' option.\n");
1150 return -ENODEV;
1151 }
1152
1153 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1154 MAX_IO_APICS);
1155 if (!count) {
1156 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1157 return -ENODEV;
1158 } else if (count < 0) {
1159 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1160 return count;
1161 }
1162
1163 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1164 acpi_parse_int_src_ovr, nr_irqs);
1165 if (count < 0) {
1166 printk(KERN_ERR PREFIX
1167 "Error parsing interrupt source overrides entry\n");
1168 /* TBD: Cleanup to allow fallback to MPS */
1169 return count;
1170 }
1171
1172 /*
1173 * If BIOS did not supply an INT_SRC_OVR for the SCI
1174 * pretend we got one so we can set the SCI flags.
1175 */
1176 if (!acpi_sci_override_gsi)
1177 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1178 acpi_gbl_FADT.sci_interrupt);
1179
1180 /* Fill in identity legacy mappings where no override */
1181 mp_config_acpi_legacy_irqs();
1182
1183 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1184 acpi_parse_nmi_src, nr_irqs);
1185 if (count < 0) {
1186 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1187 /* TBD: Cleanup to allow fallback to MPS */
1188 return count;
1189 }
1190
1191 return 0;
1192 }
1193 #else
1194 static inline int acpi_parse_madt_ioapic_entries(void)
1195 {
1196 return -1;
1197 }
1198 #endif /* !CONFIG_X86_IO_APIC */
1199
1200 static void __init early_acpi_process_madt(void)
1201 {
1202 #ifdef CONFIG_X86_LOCAL_APIC
1203 int error;
1204
1205 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1206
1207 /*
1208 * Parse MADT LAPIC entries
1209 */
1210 error = early_acpi_parse_madt_lapic_addr_ovr();
1211 if (!error) {
1212 acpi_lapic = 1;
1213 smp_found_config = 1;
1214 }
1215 if (error == -EINVAL) {
1216 /*
1217 * Dell Precision Workstation 410, 610 come here.
1218 */
1219 printk(KERN_ERR PREFIX
1220 "Invalid BIOS MADT, disabling ACPI\n");
1221 disable_acpi();
1222 }
1223 }
1224 #endif
1225 }
1226
1227 static void __init acpi_process_madt(void)
1228 {
1229 #ifdef CONFIG_X86_LOCAL_APIC
1230 int error;
1231
1232 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1233
1234 /*
1235 * Parse MADT LAPIC entries
1236 */
1237 error = acpi_parse_madt_lapic_entries();
1238 if (!error) {
1239 acpi_lapic = 1;
1240
1241 /*
1242 * Parse MADT IO-APIC entries
1243 */
1244 mutex_lock(&acpi_ioapic_lock);
1245 error = acpi_parse_madt_ioapic_entries();
1246 mutex_unlock(&acpi_ioapic_lock);
1247 if (!error) {
1248 acpi_set_irq_model_ioapic();
1249
1250 smp_found_config = 1;
1251 }
1252 }
1253 if (error == -EINVAL) {
1254 /*
1255 * Dell Precision Workstation 410, 610 come here.
1256 */
1257 printk(KERN_ERR PREFIX
1258 "Invalid BIOS MADT, disabling ACPI\n");
1259 disable_acpi();
1260 }
1261 } else {
1262 /*
1263 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1264 * In the event an MPS table was found, forget it.
1265 * Boot with "acpi=off" to use MPS on such a system.
1266 */
1267 if (smp_found_config) {
1268 printk(KERN_WARNING PREFIX
1269 "No APIC-table, disabling MPS\n");
1270 smp_found_config = 0;
1271 }
1272 }
1273
1274 /*
1275 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1276 * processors, where MPS only supports physical.
1277 */
1278 if (acpi_lapic && acpi_ioapic)
1279 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1280 "information\n");
1281 else if (acpi_lapic)
1282 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1283 "configuration information\n");
1284 #endif
1285 return;
1286 }
1287
1288 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1289 {
1290 if (!acpi_force) {
1291 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1292 d->ident);
1293 acpi_noirq_set();
1294 }
1295 return 0;
1296 }
1297
1298 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1299 {
1300 if (!acpi_force) {
1301 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1302 d->ident);
1303 acpi_disable_pci();
1304 }
1305 return 0;
1306 }
1307
1308 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1309 {
1310 if (!acpi_force) {
1311 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1312 disable_acpi();
1313 } else {
1314 printk(KERN_NOTICE
1315 "Warning: DMI blacklist says broken, but acpi forced\n");
1316 }
1317 return 0;
1318 }
1319
1320 /*
1321 * Force ignoring BIOS IRQ0 override
1322 */
1323 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1324 {
1325 if (!acpi_skip_timer_override) {
1326 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1327 d->ident);
1328 acpi_skip_timer_override = 1;
1329 }
1330 return 0;
1331 }
1332
1333 /*
1334 * ACPI offers an alternative platform interface model that removes
1335 * ACPI hardware requirements for platforms that do not implement
1336 * the PC Architecture.
1337 *
1338 * We initialize the Hardware-reduced ACPI model here:
1339 */
1340 static void __init acpi_reduced_hw_init(void)
1341 {
1342 if (acpi_gbl_reduced_hardware) {
1343 /*
1344 * Override x86_init functions and bypass legacy pic
1345 * in Hardware-reduced ACPI mode
1346 */
1347 x86_init.timers.timer_init = x86_init_noop;
1348 x86_init.irqs.pre_vector_init = x86_init_noop;
1349 legacy_pic = &null_legacy_pic;
1350 }
1351 }
1352
1353 /*
1354 * If your system is blacklisted here, but you find that acpi=force
1355 * works for you, please contact linux-acpi@vger.kernel.org
1356 */
1357 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1358 /*
1359 * Boxes that need ACPI disabled
1360 */
1361 {
1362 .callback = dmi_disable_acpi,
1363 .ident = "IBM Thinkpad",
1364 .matches = {
1365 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1366 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1367 },
1368 },
1369
1370 /*
1371 * Boxes that need ACPI PCI IRQ routing disabled
1372 */
1373 {
1374 .callback = disable_acpi_irq,
1375 .ident = "ASUS A7V",
1376 .matches = {
1377 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1378 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1379 /* newer BIOS, Revision 1011, does work */
1380 DMI_MATCH(DMI_BIOS_VERSION,
1381 "ASUS A7V ACPI BIOS Revision 1007"),
1382 },
1383 },
1384 {
1385 /*
1386 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1387 * for LPC bridge, which is needed for the PCI
1388 * interrupt links to work. DSDT fix is in bug 5966.
1389 * 2645, 2646 model numbers are shared with 600/600E/600X
1390 */
1391 .callback = disable_acpi_irq,
1392 .ident = "IBM Thinkpad 600 Series 2645",
1393 .matches = {
1394 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1395 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1396 },
1397 },
1398 {
1399 .callback = disable_acpi_irq,
1400 .ident = "IBM Thinkpad 600 Series 2646",
1401 .matches = {
1402 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1403 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1404 },
1405 },
1406 /*
1407 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1408 */
1409 { /* _BBN 0 bug */
1410 .callback = disable_acpi_pci,
1411 .ident = "ASUS PR-DLS",
1412 .matches = {
1413 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1414 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1415 DMI_MATCH(DMI_BIOS_VERSION,
1416 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1417 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1418 },
1419 },
1420 {
1421 .callback = disable_acpi_pci,
1422 .ident = "Acer TravelMate 36x Laptop",
1423 .matches = {
1424 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1425 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1426 },
1427 },
1428 {}
1429 };
1430
1431 /* second table for DMI checks that should run after early-quirks */
1432 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1433 /*
1434 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1435 * which includes some code which overrides all temperature
1436 * trip points to 16C if the INTIN2 input of the I/O APIC
1437 * is enabled. This input is incorrectly designated the
1438 * ISA IRQ 0 via an interrupt source override even though
1439 * it is wired to the output of the master 8259A and INTIN0
1440 * is not connected at all. Force ignoring BIOS IRQ0
1441 * override in that cases.
1442 */
1443 {
1444 .callback = dmi_ignore_irq0_timer_override,
1445 .ident = "HP nx6115 laptop",
1446 .matches = {
1447 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1448 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1449 },
1450 },
1451 {
1452 .callback = dmi_ignore_irq0_timer_override,
1453 .ident = "HP NX6125 laptop",
1454 .matches = {
1455 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1456 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1457 },
1458 },
1459 {
1460 .callback = dmi_ignore_irq0_timer_override,
1461 .ident = "HP NX6325 laptop",
1462 .matches = {
1463 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1465 },
1466 },
1467 {
1468 .callback = dmi_ignore_irq0_timer_override,
1469 .ident = "HP 6715b laptop",
1470 .matches = {
1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1473 },
1474 },
1475 {
1476 .callback = dmi_ignore_irq0_timer_override,
1477 .ident = "FUJITSU SIEMENS",
1478 .matches = {
1479 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1480 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1481 },
1482 },
1483 {}
1484 };
1485
1486 /*
1487 * acpi_boot_table_init() and acpi_boot_init()
1488 * called from setup_arch(), always.
1489 * 1. checksums all tables
1490 * 2. enumerates lapics
1491 * 3. enumerates io-apics
1492 *
1493 * acpi_table_init() is separate to allow reading SRAT without
1494 * other side effects.
1495 *
1496 * side effects of acpi_boot_init:
1497 * acpi_lapic = 1 if LAPIC found
1498 * acpi_ioapic = 1 if IOAPIC found
1499 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1500 * if acpi_blacklisted() acpi_disabled = 1;
1501 * acpi_irq_model=...
1502 * ...
1503 */
1504
1505 void __init acpi_boot_table_init(void)
1506 {
1507 dmi_check_system(acpi_dmi_table);
1508
1509 /*
1510 * If acpi_disabled, bail out
1511 */
1512 if (acpi_disabled)
1513 return;
1514
1515 /*
1516 * Initialize the ACPI boot-time table parser.
1517 */
1518 if (acpi_table_init()) {
1519 disable_acpi();
1520 return;
1521 }
1522
1523 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1524
1525 /*
1526 * blacklist may disable ACPI entirely
1527 */
1528 if (acpi_blacklisted()) {
1529 if (acpi_force) {
1530 printk(KERN_WARNING PREFIX "acpi=force override\n");
1531 } else {
1532 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1533 disable_acpi();
1534 return;
1535 }
1536 }
1537 }
1538
1539 int __init early_acpi_boot_init(void)
1540 {
1541 /*
1542 * If acpi_disabled, bail out
1543 */
1544 if (acpi_disabled)
1545 return 1;
1546
1547 /*
1548 * Process the Multiple APIC Description Table (MADT), if present
1549 */
1550 early_acpi_process_madt();
1551
1552 /*
1553 * Hardware-reduced ACPI mode initialization:
1554 */
1555 acpi_reduced_hw_init();
1556
1557 return 0;
1558 }
1559
1560 int __init acpi_boot_init(void)
1561 {
1562 /* those are executed after early-quirks are executed */
1563 dmi_check_system(acpi_dmi_table_late);
1564
1565 /*
1566 * If acpi_disabled, bail out
1567 */
1568 if (acpi_disabled)
1569 return 1;
1570
1571 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1572
1573 /*
1574 * set sci_int and PM timer address
1575 */
1576 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1577
1578 /*
1579 * Process the Multiple APIC Description Table (MADT), if present
1580 */
1581 acpi_process_madt();
1582
1583 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1584
1585 if (!acpi_noirq)
1586 x86_init.pci.init = pci_acpi_init;
1587
1588 return 0;
1589 }
1590
1591 static int __init parse_acpi(char *arg)
1592 {
1593 if (!arg)
1594 return -EINVAL;
1595
1596 /* "acpi=off" disables both ACPI table parsing and interpreter */
1597 if (strcmp(arg, "off") == 0) {
1598 disable_acpi();
1599 }
1600 /* acpi=force to over-ride black-list */
1601 else if (strcmp(arg, "force") == 0) {
1602 acpi_force = 1;
1603 acpi_disabled = 0;
1604 }
1605 /* acpi=strict disables out-of-spec workarounds */
1606 else if (strcmp(arg, "strict") == 0) {
1607 acpi_strict = 1;
1608 }
1609 /* acpi=rsdt use RSDT instead of XSDT */
1610 else if (strcmp(arg, "rsdt") == 0) {
1611 acpi_gbl_do_not_use_xsdt = TRUE;
1612 }
1613 /* "acpi=noirq" disables ACPI interrupt routing */
1614 else if (strcmp(arg, "noirq") == 0) {
1615 acpi_noirq_set();
1616 }
1617 /* "acpi=copy_dsdt" copys DSDT */
1618 else if (strcmp(arg, "copy_dsdt") == 0) {
1619 acpi_gbl_copy_dsdt_locally = 1;
1620 }
1621 /* "acpi=nocmcff" disables FF mode for corrected errors */
1622 else if (strcmp(arg, "nocmcff") == 0) {
1623 acpi_disable_cmcff = 1;
1624 } else {
1625 /* Core will printk when we return error. */
1626 return -EINVAL;
1627 }
1628 return 0;
1629 }
1630 early_param("acpi", parse_acpi);
1631
1632 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1633 static int __init parse_pci(char *arg)
1634 {
1635 if (arg && strcmp(arg, "noacpi") == 0)
1636 acpi_disable_pci();
1637 return 0;
1638 }
1639 early_param("pci", parse_pci);
1640
1641 int __init acpi_mps_check(void)
1642 {
1643 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1644 /* mptable code is not built-in*/
1645 if (acpi_disabled || acpi_noirq) {
1646 printk(KERN_WARNING "MPS support code is not built-in.\n"
1647 "Using acpi=off or acpi=noirq or pci=noacpi "
1648 "may have problem\n");
1649 return 1;
1650 }
1651 #endif
1652 return 0;
1653 }
1654
1655 #ifdef CONFIG_X86_IO_APIC
1656 static int __init parse_acpi_skip_timer_override(char *arg)
1657 {
1658 acpi_skip_timer_override = 1;
1659 return 0;
1660 }
1661 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1662
1663 static int __init parse_acpi_use_timer_override(char *arg)
1664 {
1665 acpi_use_timer_override = 1;
1666 return 0;
1667 }
1668 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1669 #endif /* CONFIG_X86_IO_APIC */
1670
1671 static int __init setup_acpi_sci(char *s)
1672 {
1673 if (!s)
1674 return -EINVAL;
1675 if (!strcmp(s, "edge"))
1676 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1677 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1678 else if (!strcmp(s, "level"))
1679 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1680 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1681 else if (!strcmp(s, "high"))
1682 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1683 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1684 else if (!strcmp(s, "low"))
1685 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1686 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1687 else
1688 return -EINVAL;
1689 return 0;
1690 }
1691 early_param("acpi_sci", setup_acpi_sci);
1692
1693 int __acpi_acquire_global_lock(unsigned int *lock)
1694 {
1695 unsigned int old, new, val;
1696 do {
1697 old = *lock;
1698 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1699 val = cmpxchg(lock, old, new);
1700 } while (unlikely (val != old));
1701 return (new < 3) ? -1 : 0;
1702 }
1703
1704 int __acpi_release_global_lock(unsigned int *lock)
1705 {
1706 unsigned int old, new, val;
1707 do {
1708 old = *lock;
1709 new = old & ~0x3;
1710 val = cmpxchg(lock, old, new);
1711 } while (unlikely (val != old));
1712 return old & 0x1;
1713 }
1714
1715 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1716 {
1717 e820_add_region(addr, size, E820_ACPI);
1718 update_e820();
1719 }
Linux with added FPC-III support