Loading...
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/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 */
50static int __initdata acpi_force = 0;
51int acpi_disabled;
52EXPORT_SYMBOL(acpi_disabled);
53
54#ifdef CONFIG_X86_64
55# include <asm/proto.h>
56#endif /* X86 */
57
58#define PREFIX "ACPI: "
59
60int acpi_noirq; /* skip ACPI IRQ initialization */
61int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
62EXPORT_SYMBOL(acpi_pci_disabled);
63
64int acpi_lapic;
65int acpi_ioapic;
66int acpi_strict;
67int acpi_disable_cmcff;
68
69u8 acpi_sci_flags __initdata;
70int acpi_sci_override_gsi __initdata;
71int acpi_skip_timer_override __initdata;
72int acpi_use_timer_override __initdata;
73int acpi_fix_pin2_polarity __initdata;
74
75#ifdef CONFIG_X86_LOCAL_APIC
76static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
77#endif
78
79/*
80 * Locks related to IOAPIC hotplug
81 * Hotplug side:
82 * ->device_hotplug_lock
83 * ->acpi_ioapic_lock
84 * ->ioapic_lock
85 * Interrupt mapping side:
86 * ->acpi_ioapic_lock
87 * ->ioapic_mutex
88 * ->ioapic_lock
89 */
90static DEFINE_MUTEX(acpi_ioapic_lock);
91
92/* --------------------------------------------------------------------------
93 Boot-time Configuration
94 -------------------------------------------------------------------------- */
95
96/*
97 * The default interrupt routing model is PIC (8259). This gets
98 * overridden if IOAPICs are enumerated (below).
99 */
100enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
101
102
103/*
104 * ISA irqs by default are the first 16 gsis but can be
105 * any gsi as specified by an interrupt source override.
106 */
107static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
109};
110
111#define ACPI_INVALID_GSI INT_MIN
112
113/*
114 * This is just a simple wrapper around early_ioremap(),
115 * with sanity checks for phys == 0 and size == 0.
116 */
117char *__init __acpi_map_table(unsigned long phys, unsigned long size)
118{
119
120 if (!phys || !size)
121 return NULL;
122
123 return early_ioremap(phys, size);
124}
125
126void __init __acpi_unmap_table(char *map, unsigned long size)
127{
128 if (!map || !size)
129 return;
130
131 early_iounmap(map, size);
132}
133
134#ifdef CONFIG_X86_LOCAL_APIC
135static int __init acpi_parse_madt(struct acpi_table_header *table)
136{
137 struct acpi_table_madt *madt = NULL;
138
139 if (!cpu_has_apic)
140 return -EINVAL;
141
142 madt = (struct acpi_table_madt *)table;
143 if (!madt) {
144 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
145 return -ENODEV;
146 }
147
148 if (madt->address) {
149 acpi_lapic_addr = (u64) madt->address;
150
151 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
152 madt->address);
153 }
154
155 default_acpi_madt_oem_check(madt->header.oem_id,
156 madt->header.oem_table_id);
157
158 return 0;
159}
160
161/**
162 * acpi_register_lapic - register a local apic and generates a logic cpu number
163 * @id: local apic id to register
164 * @enabled: this cpu is enabled or not
165 *
166 * Returns the logic cpu number which maps to the local apic
167 */
168static int acpi_register_lapic(int id, u8 enabled)
169{
170 unsigned int ver = 0;
171
172 if (id >= MAX_LOCAL_APIC) {
173 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
174 return -EINVAL;
175 }
176
177 if (!enabled) {
178 ++disabled_cpus;
179 return -EINVAL;
180 }
181
182 if (boot_cpu_physical_apicid != -1U)
183 ver = apic_version[boot_cpu_physical_apicid];
184
185 return generic_processor_info(id, ver);
186}
187
188static int __init
189acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
190{
191 struct acpi_madt_local_x2apic *processor = NULL;
192 int apic_id;
193 u8 enabled;
194
195 processor = (struct acpi_madt_local_x2apic *)header;
196
197 if (BAD_MADT_ENTRY(processor, end))
198 return -EINVAL;
199
200 acpi_table_print_madt_entry(header);
201
202 apic_id = processor->local_apic_id;
203 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
204#ifdef CONFIG_X86_X2APIC
205 /*
206 * We need to register disabled CPU as well to permit
207 * counting disabled CPUs. This allows us to size
208 * cpus_possible_map more accurately, to permit
209 * to not preallocating memory for all NR_CPUS
210 * when we use CPU hotplug.
211 */
212 if (!apic->apic_id_valid(apic_id) && enabled)
213 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
214 else
215 acpi_register_lapic(apic_id, enabled);
216#else
217 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
218#endif
219
220 return 0;
221}
222
223static int __init
224acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
225{
226 struct acpi_madt_local_apic *processor = NULL;
227
228 processor = (struct acpi_madt_local_apic *)header;
229
230 if (BAD_MADT_ENTRY(processor, end))
231 return -EINVAL;
232
233 acpi_table_print_madt_entry(header);
234
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 acpi_register_lapic(processor->id, /* APIC ID */
243 processor->lapic_flags & ACPI_MADT_ENABLED);
244
245 return 0;
246}
247
248static int __init
249acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
250{
251 struct acpi_madt_local_sapic *processor = NULL;
252
253 processor = (struct acpi_madt_local_sapic *)header;
254
255 if (BAD_MADT_ENTRY(processor, end))
256 return -EINVAL;
257
258 acpi_table_print_madt_entry(header);
259
260 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
261 processor->lapic_flags & ACPI_MADT_ENABLED);
262
263 return 0;
264}
265
266static int __init
267acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
268 const unsigned long end)
269{
270 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
271
272 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
273
274 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
275 return -EINVAL;
276
277 acpi_lapic_addr = lapic_addr_ovr->address;
278
279 return 0;
280}
281
282static int __init
283acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
284 const unsigned long end)
285{
286 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
287
288 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
289
290 if (BAD_MADT_ENTRY(x2apic_nmi, end))
291 return -EINVAL;
292
293 acpi_table_print_madt_entry(header);
294
295 if (x2apic_nmi->lint != 1)
296 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
297
298 return 0;
299}
300
301static int __init
302acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
303{
304 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
305
306 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
307
308 if (BAD_MADT_ENTRY(lapic_nmi, end))
309 return -EINVAL;
310
311 acpi_table_print_madt_entry(header);
312
313 if (lapic_nmi->lint != 1)
314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
315
316 return 0;
317}
318
319#endif /*CONFIG_X86_LOCAL_APIC */
320
321#ifdef CONFIG_X86_IO_APIC
322#define MP_ISA_BUS 0
323
324static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
325 u32 gsi)
326{
327 int ioapic;
328 int pin;
329 struct mpc_intsrc mp_irq;
330
331 /*
332 * Convert 'gsi' to 'ioapic.pin'.
333 */
334 ioapic = mp_find_ioapic(gsi);
335 if (ioapic < 0)
336 return;
337 pin = mp_find_ioapic_pin(ioapic, gsi);
338
339 /*
340 * TBD: This check is for faulty timer entries, where the override
341 * erroneously sets the trigger to level, resulting in a HUGE
342 * increase of timer interrupts!
343 */
344 if ((bus_irq == 0) && (trigger == 3))
345 trigger = 1;
346
347 mp_irq.type = MP_INTSRC;
348 mp_irq.irqtype = mp_INT;
349 mp_irq.irqflag = (trigger << 2) | polarity;
350 mp_irq.srcbus = MP_ISA_BUS;
351 mp_irq.srcbusirq = bus_irq; /* IRQ */
352 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
353 mp_irq.dstirq = pin; /* INTIN# */
354
355 mp_save_irq(&mp_irq);
356
357 /*
358 * Reset default identity mapping if gsi is also an legacy IRQ,
359 * otherwise there will be more than one entry with the same GSI
360 * and acpi_isa_irq_to_gsi() may give wrong result.
361 */
362 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
363 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
364 isa_irq_to_gsi[bus_irq] = gsi;
365}
366
367static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
368 int polarity)
369{
370#ifdef CONFIG_X86_MPPARSE
371 struct mpc_intsrc mp_irq;
372 struct pci_dev *pdev;
373 unsigned char number;
374 unsigned int devfn;
375 int ioapic;
376 u8 pin;
377
378 if (!acpi_ioapic)
379 return 0;
380 if (!dev || !dev_is_pci(dev))
381 return 0;
382
383 pdev = to_pci_dev(dev);
384 number = pdev->bus->number;
385 devfn = pdev->devfn;
386 pin = pdev->pin;
387 /* print the entry should happen on mptable identically */
388 mp_irq.type = MP_INTSRC;
389 mp_irq.irqtype = mp_INT;
390 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
391 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
392 mp_irq.srcbus = number;
393 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
394 ioapic = mp_find_ioapic(gsi);
395 mp_irq.dstapic = mpc_ioapic_id(ioapic);
396 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
397
398 mp_save_irq(&mp_irq);
399#endif
400 return 0;
401}
402
403static int __init
404acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
405{
406 struct acpi_madt_io_apic *ioapic = NULL;
407 struct ioapic_domain_cfg cfg = {
408 .type = IOAPIC_DOMAIN_DYNAMIC,
409 .ops = &mp_ioapic_irqdomain_ops,
410 };
411
412 ioapic = (struct acpi_madt_io_apic *)header;
413
414 if (BAD_MADT_ENTRY(ioapic, end))
415 return -EINVAL;
416
417 acpi_table_print_madt_entry(header);
418
419 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
420 if (ioapic->global_irq_base < nr_legacy_irqs())
421 cfg.type = IOAPIC_DOMAIN_LEGACY;
422
423 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
424 &cfg);
425
426 return 0;
427}
428
429/*
430 * Parse Interrupt Source Override for the ACPI SCI
431 */
432static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
433{
434 if (trigger == 0) /* compatible SCI trigger is level */
435 trigger = 3;
436
437 if (polarity == 0) /* compatible SCI polarity is low */
438 polarity = 3;
439
440 /* Command-line over-ride via acpi_sci= */
441 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
442 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
443
444 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
445 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
446
447 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
448 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
449
450 /*
451 * stash over-ride to indicate we've been here
452 * and for later update of acpi_gbl_FADT
453 */
454 acpi_sci_override_gsi = gsi;
455 return;
456}
457
458static int __init
459acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
460 const unsigned long end)
461{
462 struct acpi_madt_interrupt_override *intsrc = NULL;
463
464 intsrc = (struct acpi_madt_interrupt_override *)header;
465
466 if (BAD_MADT_ENTRY(intsrc, end))
467 return -EINVAL;
468
469 acpi_table_print_madt_entry(header);
470
471 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
472 acpi_sci_ioapic_setup(intsrc->source_irq,
473 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
474 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
475 intsrc->global_irq);
476 return 0;
477 }
478
479 if (intsrc->source_irq == 0) {
480 if (acpi_skip_timer_override) {
481 printk(PREFIX "BIOS IRQ0 override ignored.\n");
482 return 0;
483 }
484
485 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
486 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
487 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
488 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
489 }
490 }
491
492 mp_override_legacy_irq(intsrc->source_irq,
493 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
494 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
495 intsrc->global_irq);
496
497 return 0;
498}
499
500static int __init
501acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
502{
503 struct acpi_madt_nmi_source *nmi_src = NULL;
504
505 nmi_src = (struct acpi_madt_nmi_source *)header;
506
507 if (BAD_MADT_ENTRY(nmi_src, end))
508 return -EINVAL;
509
510 acpi_table_print_madt_entry(header);
511
512 /* TBD: Support nimsrc entries? */
513
514 return 0;
515}
516
517#endif /* CONFIG_X86_IO_APIC */
518
519/*
520 * acpi_pic_sci_set_trigger()
521 *
522 * use ELCR to set PIC-mode trigger type for SCI
523 *
524 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
525 * it may require Edge Trigger -- use "acpi_sci=edge"
526 *
527 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
528 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
529 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
530 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
531 */
532
533void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
534{
535 unsigned int mask = 1 << irq;
536 unsigned int old, new;
537
538 /* Real old ELCR mask */
539 old = inb(0x4d0) | (inb(0x4d1) << 8);
540
541 /*
542 * If we use ACPI to set PCI IRQs, then we should clear ELCR
543 * since we will set it correctly as we enable the PCI irq
544 * routing.
545 */
546 new = acpi_noirq ? old : 0;
547
548 /*
549 * Update SCI information in the ELCR, it isn't in the PCI
550 * routing tables..
551 */
552 switch (trigger) {
553 case 1: /* Edge - clear */
554 new &= ~mask;
555 break;
556 case 3: /* Level - set */
557 new |= mask;
558 break;
559 }
560
561 if (old == new)
562 return;
563
564 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
565 outb(new, 0x4d0);
566 outb(new >> 8, 0x4d1);
567}
568
569int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
570{
571 int rc, irq, trigger, polarity;
572
573 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
574 *irqp = gsi;
575 return 0;
576 }
577
578 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
579 if (rc == 0) {
580 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
581 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
582 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
583 if (irq >= 0) {
584 *irqp = irq;
585 return 0;
586 }
587 }
588
589 return -1;
590}
591EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
592
593int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
594{
595 if (isa_irq < nr_legacy_irqs() &&
596 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
597 *gsi = isa_irq_to_gsi[isa_irq];
598 return 0;
599 }
600
601 return -1;
602}
603
604static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
605 int trigger, int polarity)
606{
607#ifdef CONFIG_PCI
608 /*
609 * Make sure all (legacy) PCI IRQs are set as level-triggered.
610 */
611 if (trigger == ACPI_LEVEL_SENSITIVE)
612 elcr_set_level_irq(gsi);
613#endif
614
615 return gsi;
616}
617
618#ifdef CONFIG_X86_LOCAL_APIC
619static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
620 int trigger, int polarity)
621{
622 int irq = gsi;
623#ifdef CONFIG_X86_IO_APIC
624 int node;
625 struct irq_alloc_info info;
626
627 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
628 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
629 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
630 ioapic_set_alloc_attr(&info, node, trigger, polarity);
631
632 mutex_lock(&acpi_ioapic_lock);
633 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
634 /* Don't set up the ACPI SCI because it's already set up */
635 if (irq >= 0 && enable_update_mptable &&
636 acpi_gbl_FADT.sci_interrupt != gsi)
637 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
638 mutex_unlock(&acpi_ioapic_lock);
639#endif
640
641 return irq;
642}
643
644static void acpi_unregister_gsi_ioapic(u32 gsi)
645{
646#ifdef CONFIG_X86_IO_APIC
647 int irq;
648
649 mutex_lock(&acpi_ioapic_lock);
650 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
651 if (irq > 0)
652 mp_unmap_irq(irq);
653 mutex_unlock(&acpi_ioapic_lock);
654#endif
655}
656#endif
657
658int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
659 int trigger, int polarity) = acpi_register_gsi_pic;
660void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
661
662#ifdef CONFIG_ACPI_SLEEP
663int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
664#else
665int (*acpi_suspend_lowlevel)(void);
666#endif
667
668/*
669 * success: return IRQ number (>=0)
670 * failure: return < 0
671 */
672int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
673{
674 return __acpi_register_gsi(dev, gsi, trigger, polarity);
675}
676EXPORT_SYMBOL_GPL(acpi_register_gsi);
677
678void acpi_unregister_gsi(u32 gsi)
679{
680 if (__acpi_unregister_gsi)
681 __acpi_unregister_gsi(gsi);
682}
683EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
684
685#ifdef CONFIG_X86_LOCAL_APIC
686static void __init acpi_set_irq_model_ioapic(void)
687{
688 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
689 __acpi_register_gsi = acpi_register_gsi_ioapic;
690 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
691 acpi_ioapic = 1;
692}
693#endif
694
695/*
696 * ACPI based hotplug support for CPU
697 */
698#ifdef CONFIG_ACPI_HOTPLUG_CPU
699#include <acpi/processor.h>
700
701static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
702{
703#ifdef CONFIG_ACPI_NUMA
704 int nid;
705
706 nid = acpi_get_node(handle);
707 if (nid != -1) {
708 set_apicid_to_node(physid, nid);
709 numa_set_node(cpu, nid);
710 }
711#endif
712}
713
714int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
715{
716 int cpu;
717
718 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
719 if (cpu < 0) {
720 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
721 return cpu;
722 }
723
724 acpi_processor_set_pdc(handle);
725 acpi_map_cpu2node(handle, cpu, physid);
726
727 *pcpu = cpu;
728 return 0;
729}
730EXPORT_SYMBOL(acpi_map_cpu);
731
732int acpi_unmap_cpu(int cpu)
733{
734#ifdef CONFIG_ACPI_NUMA
735 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
736#endif
737
738 per_cpu(x86_cpu_to_apicid, cpu) = -1;
739 set_cpu_present(cpu, false);
740 num_processors--;
741
742 return (0);
743}
744EXPORT_SYMBOL(acpi_unmap_cpu);
745#endif /* CONFIG_ACPI_HOTPLUG_CPU */
746
747int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
748{
749 int ret = -ENOSYS;
750#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
751 int ioapic_id;
752 u64 addr;
753 struct ioapic_domain_cfg cfg = {
754 .type = IOAPIC_DOMAIN_DYNAMIC,
755 .ops = &mp_ioapic_irqdomain_ops,
756 };
757
758 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
759 if (ioapic_id < 0) {
760 unsigned long long uid;
761 acpi_status status;
762
763 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
764 NULL, &uid);
765 if (ACPI_FAILURE(status)) {
766 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
767 return -EINVAL;
768 }
769 ioapic_id = (int)uid;
770 }
771
772 mutex_lock(&acpi_ioapic_lock);
773 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
774 mutex_unlock(&acpi_ioapic_lock);
775#endif
776
777 return ret;
778}
779EXPORT_SYMBOL(acpi_register_ioapic);
780
781int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
782{
783 int ret = -ENOSYS;
784
785#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
786 mutex_lock(&acpi_ioapic_lock);
787 ret = mp_unregister_ioapic(gsi_base);
788 mutex_unlock(&acpi_ioapic_lock);
789#endif
790
791 return ret;
792}
793EXPORT_SYMBOL(acpi_unregister_ioapic);
794
795/**
796 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
797 * has been registered
798 * @handle: ACPI handle of the IOAPIC deivce
799 * @gsi_base: GSI base associated with the IOAPIC
800 *
801 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
802 * with acpi_register_ioapic()/acpi_unregister_ioapic().
803 */
804int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
805{
806 int ret = 0;
807
808#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
809 mutex_lock(&acpi_ioapic_lock);
810 ret = mp_ioapic_registered(gsi_base);
811 mutex_unlock(&acpi_ioapic_lock);
812#endif
813
814 return ret;
815}
816
817static int __init acpi_parse_sbf(struct acpi_table_header *table)
818{
819 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
820
821 sbf_port = sb->cmos_index; /* Save CMOS port */
822
823 return 0;
824}
825
826#ifdef CONFIG_HPET_TIMER
827#include <asm/hpet.h>
828
829static struct resource *hpet_res __initdata;
830
831static int __init acpi_parse_hpet(struct acpi_table_header *table)
832{
833 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
834
835 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
836 printk(KERN_WARNING PREFIX "HPET timers must be located in "
837 "memory.\n");
838 return -1;
839 }
840
841 hpet_address = hpet_tbl->address.address;
842 hpet_blockid = hpet_tbl->sequence;
843
844 /*
845 * Some broken BIOSes advertise HPET at 0x0. We really do not
846 * want to allocate a resource there.
847 */
848 if (!hpet_address) {
849 printk(KERN_WARNING PREFIX
850 "HPET id: %#x base: %#lx is invalid\n",
851 hpet_tbl->id, hpet_address);
852 return 0;
853 }
854#ifdef CONFIG_X86_64
855 /*
856 * Some even more broken BIOSes advertise HPET at
857 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
858 * some noise:
859 */
860 if (hpet_address == 0xfed0000000000000UL) {
861 if (!hpet_force_user) {
862 printk(KERN_WARNING PREFIX "HPET id: %#x "
863 "base: 0xfed0000000000000 is bogus\n "
864 "try hpet=force on the kernel command line to "
865 "fix it up to 0xfed00000.\n", hpet_tbl->id);
866 hpet_address = 0;
867 return 0;
868 }
869 printk(KERN_WARNING PREFIX
870 "HPET id: %#x base: 0xfed0000000000000 fixed up "
871 "to 0xfed00000.\n", hpet_tbl->id);
872 hpet_address >>= 32;
873 }
874#endif
875 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
876 hpet_tbl->id, hpet_address);
877
878 /*
879 * Allocate and initialize the HPET firmware resource for adding into
880 * the resource tree during the lateinit timeframe.
881 */
882#define HPET_RESOURCE_NAME_SIZE 9
883 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
884
885 hpet_res->name = (void *)&hpet_res[1];
886 hpet_res->flags = IORESOURCE_MEM;
887 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
888 hpet_tbl->sequence);
889
890 hpet_res->start = hpet_address;
891 hpet_res->end = hpet_address + (1 * 1024) - 1;
892
893 return 0;
894}
895
896/*
897 * hpet_insert_resource inserts the HPET resources used into the resource
898 * tree.
899 */
900static __init int hpet_insert_resource(void)
901{
902 if (!hpet_res)
903 return 1;
904
905 return insert_resource(&iomem_resource, hpet_res);
906}
907
908late_initcall(hpet_insert_resource);
909
910#else
911#define acpi_parse_hpet NULL
912#endif
913
914static int __init acpi_parse_fadt(struct acpi_table_header *table)
915{
916
917#ifdef CONFIG_X86_PM_TIMER
918 /* detect the location of the ACPI PM Timer */
919 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
920 /* FADT rev. 2 */
921 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
922 ACPI_ADR_SPACE_SYSTEM_IO)
923 return 0;
924
925 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
926 /*
927 * "X" fields are optional extensions to the original V1.0
928 * fields, so we must selectively expand V1.0 fields if the
929 * corresponding X field is zero.
930 */
931 if (!pmtmr_ioport)
932 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
933 } else {
934 /* FADT rev. 1 */
935 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
936 }
937 if (pmtmr_ioport)
938 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
939 pmtmr_ioport);
940#endif
941 return 0;
942}
943
944#ifdef CONFIG_X86_LOCAL_APIC
945/*
946 * Parse LAPIC entries in MADT
947 * returns 0 on success, < 0 on error
948 */
949
950static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
951{
952 int count;
953
954 if (!cpu_has_apic)
955 return -ENODEV;
956
957 /*
958 * Note that the LAPIC address is obtained from the MADT (32-bit value)
959 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
960 */
961
962 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
963 acpi_parse_lapic_addr_ovr, 0);
964 if (count < 0) {
965 printk(KERN_ERR PREFIX
966 "Error parsing LAPIC address override entry\n");
967 return count;
968 }
969
970 register_lapic_address(acpi_lapic_addr);
971
972 return count;
973}
974
975static int __init acpi_parse_madt_lapic_entries(void)
976{
977 int count;
978 int x2count = 0;
979 int ret;
980 struct acpi_subtable_proc madt_proc[2];
981
982 if (!cpu_has_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 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1001 acpi_parse_sapic, MAX_LOCAL_APIC);
1002
1003 if (!count) {
1004 memset(madt_proc, 0, sizeof(madt_proc));
1005 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1006 madt_proc[0].handler = acpi_parse_lapic;
1007 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1008 madt_proc[1].handler = acpi_parse_x2apic;
1009 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1010 sizeof(struct acpi_table_madt),
1011 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1012 if (ret < 0) {
1013 printk(KERN_ERR PREFIX
1014 "Error parsing LAPIC/X2APIC entries\n");
1015 return ret;
1016 }
1017
1018 x2count = madt_proc[0].count;
1019 count = madt_proc[1].count;
1020 }
1021 if (!count && !x2count) {
1022 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1023 /* TBD: Cleanup to allow fallback to MPS */
1024 return -ENODEV;
1025 } else if (count < 0 || x2count < 0) {
1026 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1027 /* TBD: Cleanup to allow fallback to MPS */
1028 return count;
1029 }
1030
1031 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1032 acpi_parse_x2apic_nmi, 0);
1033 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1034 acpi_parse_lapic_nmi, 0);
1035 if (count < 0 || x2count < 0) {
1036 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1037 /* TBD: Cleanup to allow fallback to MPS */
1038 return count;
1039 }
1040 return 0;
1041}
1042#endif /* CONFIG_X86_LOCAL_APIC */
1043
1044#ifdef CONFIG_X86_IO_APIC
1045static void __init mp_config_acpi_legacy_irqs(void)
1046{
1047 int i;
1048 struct mpc_intsrc mp_irq;
1049
1050#ifdef CONFIG_EISA
1051 /*
1052 * Fabricate the legacy ISA bus (bus #31).
1053 */
1054 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1055#endif
1056 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1057 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1058
1059 /*
1060 * Use the default configuration for the IRQs 0-15. Unless
1061 * overridden by (MADT) interrupt source override entries.
1062 */
1063 for (i = 0; i < nr_legacy_irqs(); i++) {
1064 int ioapic, pin;
1065 unsigned int dstapic;
1066 int idx;
1067 u32 gsi;
1068
1069 /* Locate the gsi that irq i maps to. */
1070 if (acpi_isa_irq_to_gsi(i, &gsi))
1071 continue;
1072
1073 /*
1074 * Locate the IOAPIC that manages the ISA IRQ.
1075 */
1076 ioapic = mp_find_ioapic(gsi);
1077 if (ioapic < 0)
1078 continue;
1079 pin = mp_find_ioapic_pin(ioapic, gsi);
1080 dstapic = mpc_ioapic_id(ioapic);
1081
1082 for (idx = 0; idx < mp_irq_entries; idx++) {
1083 struct mpc_intsrc *irq = mp_irqs + idx;
1084
1085 /* Do we already have a mapping for this ISA IRQ? */
1086 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1087 break;
1088
1089 /* Do we already have a mapping for this IOAPIC pin */
1090 if (irq->dstapic == dstapic && irq->dstirq == pin)
1091 break;
1092 }
1093
1094 if (idx != mp_irq_entries) {
1095 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1096 continue; /* IRQ already used */
1097 }
1098
1099 mp_irq.type = MP_INTSRC;
1100 mp_irq.irqflag = 0; /* Conforming */
1101 mp_irq.srcbus = MP_ISA_BUS;
1102 mp_irq.dstapic = dstapic;
1103 mp_irq.irqtype = mp_INT;
1104 mp_irq.srcbusirq = i; /* Identity mapped */
1105 mp_irq.dstirq = pin;
1106
1107 mp_save_irq(&mp_irq);
1108 }
1109}
1110
1111/*
1112 * Parse IOAPIC related entries in MADT
1113 * returns 0 on success, < 0 on error
1114 */
1115static int __init acpi_parse_madt_ioapic_entries(void)
1116{
1117 int count;
1118
1119 /*
1120 * ACPI interpreter is required to complete interrupt setup,
1121 * so if it is off, don't enumerate the io-apics with ACPI.
1122 * If MPS is present, it will handle them,
1123 * otherwise the system will stay in PIC mode
1124 */
1125 if (acpi_disabled || acpi_noirq)
1126 return -ENODEV;
1127
1128 if (!cpu_has_apic)
1129 return -ENODEV;
1130
1131 /*
1132 * if "noapic" boot option, don't look for IO-APICs
1133 */
1134 if (skip_ioapic_setup) {
1135 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1136 "due to 'noapic' option.\n");
1137 return -ENODEV;
1138 }
1139
1140 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1141 MAX_IO_APICS);
1142 if (!count) {
1143 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1144 return -ENODEV;
1145 } else if (count < 0) {
1146 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1147 return count;
1148 }
1149
1150 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1151 acpi_parse_int_src_ovr, nr_irqs);
1152 if (count < 0) {
1153 printk(KERN_ERR PREFIX
1154 "Error parsing interrupt source overrides entry\n");
1155 /* TBD: Cleanup to allow fallback to MPS */
1156 return count;
1157 }
1158
1159 /*
1160 * If BIOS did not supply an INT_SRC_OVR for the SCI
1161 * pretend we got one so we can set the SCI flags.
1162 */
1163 if (!acpi_sci_override_gsi)
1164 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1165 acpi_gbl_FADT.sci_interrupt);
1166
1167 /* Fill in identity legacy mappings where no override */
1168 mp_config_acpi_legacy_irqs();
1169
1170 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1171 acpi_parse_nmi_src, nr_irqs);
1172 if (count < 0) {
1173 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1174 /* TBD: Cleanup to allow fallback to MPS */
1175 return count;
1176 }
1177
1178 return 0;
1179}
1180#else
1181static inline int acpi_parse_madt_ioapic_entries(void)
1182{
1183 return -1;
1184}
1185#endif /* !CONFIG_X86_IO_APIC */
1186
1187static void __init early_acpi_process_madt(void)
1188{
1189#ifdef CONFIG_X86_LOCAL_APIC
1190 int error;
1191
1192 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1193
1194 /*
1195 * Parse MADT LAPIC entries
1196 */
1197 error = early_acpi_parse_madt_lapic_addr_ovr();
1198 if (!error) {
1199 acpi_lapic = 1;
1200 smp_found_config = 1;
1201 }
1202 if (error == -EINVAL) {
1203 /*
1204 * Dell Precision Workstation 410, 610 come here.
1205 */
1206 printk(KERN_ERR PREFIX
1207 "Invalid BIOS MADT, disabling ACPI\n");
1208 disable_acpi();
1209 }
1210 }
1211#endif
1212}
1213
1214static void __init acpi_process_madt(void)
1215{
1216#ifdef CONFIG_X86_LOCAL_APIC
1217 int error;
1218
1219 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1220
1221 /*
1222 * Parse MADT LAPIC entries
1223 */
1224 error = acpi_parse_madt_lapic_entries();
1225 if (!error) {
1226 acpi_lapic = 1;
1227
1228 /*
1229 * Parse MADT IO-APIC entries
1230 */
1231 mutex_lock(&acpi_ioapic_lock);
1232 error = acpi_parse_madt_ioapic_entries();
1233 mutex_unlock(&acpi_ioapic_lock);
1234 if (!error) {
1235 acpi_set_irq_model_ioapic();
1236
1237 smp_found_config = 1;
1238 }
1239 }
1240 if (error == -EINVAL) {
1241 /*
1242 * Dell Precision Workstation 410, 610 come here.
1243 */
1244 printk(KERN_ERR PREFIX
1245 "Invalid BIOS MADT, disabling ACPI\n");
1246 disable_acpi();
1247 }
1248 } else {
1249 /*
1250 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1251 * In the event an MPS table was found, forget it.
1252 * Boot with "acpi=off" to use MPS on such a system.
1253 */
1254 if (smp_found_config) {
1255 printk(KERN_WARNING PREFIX
1256 "No APIC-table, disabling MPS\n");
1257 smp_found_config = 0;
1258 }
1259 }
1260
1261 /*
1262 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1263 * processors, where MPS only supports physical.
1264 */
1265 if (acpi_lapic && acpi_ioapic)
1266 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1267 "information\n");
1268 else if (acpi_lapic)
1269 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1270 "configuration information\n");
1271#endif
1272 return;
1273}
1274
1275static int __init disable_acpi_irq(const struct dmi_system_id *d)
1276{
1277 if (!acpi_force) {
1278 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1279 d->ident);
1280 acpi_noirq_set();
1281 }
1282 return 0;
1283}
1284
1285static int __init disable_acpi_pci(const struct dmi_system_id *d)
1286{
1287 if (!acpi_force) {
1288 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1289 d->ident);
1290 acpi_disable_pci();
1291 }
1292 return 0;
1293}
1294
1295static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1296{
1297 if (!acpi_force) {
1298 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1299 disable_acpi();
1300 } else {
1301 printk(KERN_NOTICE
1302 "Warning: DMI blacklist says broken, but acpi forced\n");
1303 }
1304 return 0;
1305}
1306
1307/*
1308 * Force ignoring BIOS IRQ0 override
1309 */
1310static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1311{
1312 if (!acpi_skip_timer_override) {
1313 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1314 d->ident);
1315 acpi_skip_timer_override = 1;
1316 }
1317 return 0;
1318}
1319
1320/*
1321 * ACPI offers an alternative platform interface model that removes
1322 * ACPI hardware requirements for platforms that do not implement
1323 * the PC Architecture.
1324 *
1325 * We initialize the Hardware-reduced ACPI model here:
1326 */
1327static void __init acpi_reduced_hw_init(void)
1328{
1329 if (acpi_gbl_reduced_hardware) {
1330 /*
1331 * Override x86_init functions and bypass legacy pic
1332 * in Hardware-reduced ACPI mode
1333 */
1334 x86_init.timers.timer_init = x86_init_noop;
1335 x86_init.irqs.pre_vector_init = x86_init_noop;
1336 legacy_pic = &null_legacy_pic;
1337 }
1338}
1339
1340/*
1341 * If your system is blacklisted here, but you find that acpi=force
1342 * works for you, please contact linux-acpi@vger.kernel.org
1343 */
1344static struct dmi_system_id __initdata acpi_dmi_table[] = {
1345 /*
1346 * Boxes that need ACPI disabled
1347 */
1348 {
1349 .callback = dmi_disable_acpi,
1350 .ident = "IBM Thinkpad",
1351 .matches = {
1352 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1353 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1354 },
1355 },
1356
1357 /*
1358 * Boxes that need ACPI PCI IRQ routing disabled
1359 */
1360 {
1361 .callback = disable_acpi_irq,
1362 .ident = "ASUS A7V",
1363 .matches = {
1364 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1365 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1366 /* newer BIOS, Revision 1011, does work */
1367 DMI_MATCH(DMI_BIOS_VERSION,
1368 "ASUS A7V ACPI BIOS Revision 1007"),
1369 },
1370 },
1371 {
1372 /*
1373 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1374 * for LPC bridge, which is needed for the PCI
1375 * interrupt links to work. DSDT fix is in bug 5966.
1376 * 2645, 2646 model numbers are shared with 600/600E/600X
1377 */
1378 .callback = disable_acpi_irq,
1379 .ident = "IBM Thinkpad 600 Series 2645",
1380 .matches = {
1381 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1382 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1383 },
1384 },
1385 {
1386 .callback = disable_acpi_irq,
1387 .ident = "IBM Thinkpad 600 Series 2646",
1388 .matches = {
1389 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1390 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1391 },
1392 },
1393 /*
1394 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1395 */
1396 { /* _BBN 0 bug */
1397 .callback = disable_acpi_pci,
1398 .ident = "ASUS PR-DLS",
1399 .matches = {
1400 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1401 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1402 DMI_MATCH(DMI_BIOS_VERSION,
1403 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1404 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1405 },
1406 },
1407 {
1408 .callback = disable_acpi_pci,
1409 .ident = "Acer TravelMate 36x Laptop",
1410 .matches = {
1411 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1412 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1413 },
1414 },
1415 {}
1416};
1417
1418/* second table for DMI checks that should run after early-quirks */
1419static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1420 /*
1421 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1422 * which includes some code which overrides all temperature
1423 * trip points to 16C if the INTIN2 input of the I/O APIC
1424 * is enabled. This input is incorrectly designated the
1425 * ISA IRQ 0 via an interrupt source override even though
1426 * it is wired to the output of the master 8259A and INTIN0
1427 * is not connected at all. Force ignoring BIOS IRQ0
1428 * override in that cases.
1429 */
1430 {
1431 .callback = dmi_ignore_irq0_timer_override,
1432 .ident = "HP nx6115 laptop",
1433 .matches = {
1434 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1435 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1436 },
1437 },
1438 {
1439 .callback = dmi_ignore_irq0_timer_override,
1440 .ident = "HP NX6125 laptop",
1441 .matches = {
1442 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1443 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1444 },
1445 },
1446 {
1447 .callback = dmi_ignore_irq0_timer_override,
1448 .ident = "HP NX6325 laptop",
1449 .matches = {
1450 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1451 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1452 },
1453 },
1454 {
1455 .callback = dmi_ignore_irq0_timer_override,
1456 .ident = "HP 6715b laptop",
1457 .matches = {
1458 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1459 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1460 },
1461 },
1462 {
1463 .callback = dmi_ignore_irq0_timer_override,
1464 .ident = "FUJITSU SIEMENS",
1465 .matches = {
1466 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1467 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1468 },
1469 },
1470 {}
1471};
1472
1473/*
1474 * acpi_boot_table_init() and acpi_boot_init()
1475 * called from setup_arch(), always.
1476 * 1. checksums all tables
1477 * 2. enumerates lapics
1478 * 3. enumerates io-apics
1479 *
1480 * acpi_table_init() is separate to allow reading SRAT without
1481 * other side effects.
1482 *
1483 * side effects of acpi_boot_init:
1484 * acpi_lapic = 1 if LAPIC found
1485 * acpi_ioapic = 1 if IOAPIC found
1486 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1487 * if acpi_blacklisted() acpi_disabled = 1;
1488 * acpi_irq_model=...
1489 * ...
1490 */
1491
1492void __init acpi_boot_table_init(void)
1493{
1494 dmi_check_system(acpi_dmi_table);
1495
1496 /*
1497 * If acpi_disabled, bail out
1498 */
1499 if (acpi_disabled)
1500 return;
1501
1502 /*
1503 * Initialize the ACPI boot-time table parser.
1504 */
1505 if (acpi_table_init()) {
1506 disable_acpi();
1507 return;
1508 }
1509
1510 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1511
1512 /*
1513 * blacklist may disable ACPI entirely
1514 */
1515 if (acpi_blacklisted()) {
1516 if (acpi_force) {
1517 printk(KERN_WARNING PREFIX "acpi=force override\n");
1518 } else {
1519 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1520 disable_acpi();
1521 return;
1522 }
1523 }
1524}
1525
1526int __init early_acpi_boot_init(void)
1527{
1528 /*
1529 * If acpi_disabled, bail out
1530 */
1531 if (acpi_disabled)
1532 return 1;
1533
1534 /*
1535 * Process the Multiple APIC Description Table (MADT), if present
1536 */
1537 early_acpi_process_madt();
1538
1539 /*
1540 * Hardware-reduced ACPI mode initialization:
1541 */
1542 acpi_reduced_hw_init();
1543
1544 return 0;
1545}
1546
1547int __init acpi_boot_init(void)
1548{
1549 /* those are executed after early-quirks are executed */
1550 dmi_check_system(acpi_dmi_table_late);
1551
1552 /*
1553 * If acpi_disabled, bail out
1554 */
1555 if (acpi_disabled)
1556 return 1;
1557
1558 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1559
1560 /*
1561 * set sci_int and PM timer address
1562 */
1563 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1564
1565 /*
1566 * Process the Multiple APIC Description Table (MADT), if present
1567 */
1568 acpi_process_madt();
1569
1570 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1571
1572 if (!acpi_noirq)
1573 x86_init.pci.init = pci_acpi_init;
1574
1575 return 0;
1576}
1577
1578static int __init parse_acpi(char *arg)
1579{
1580 if (!arg)
1581 return -EINVAL;
1582
1583 /* "acpi=off" disables both ACPI table parsing and interpreter */
1584 if (strcmp(arg, "off") == 0) {
1585 disable_acpi();
1586 }
1587 /* acpi=force to over-ride black-list */
1588 else if (strcmp(arg, "force") == 0) {
1589 acpi_force = 1;
1590 acpi_disabled = 0;
1591 }
1592 /* acpi=strict disables out-of-spec workarounds */
1593 else if (strcmp(arg, "strict") == 0) {
1594 acpi_strict = 1;
1595 }
1596 /* acpi=rsdt use RSDT instead of XSDT */
1597 else if (strcmp(arg, "rsdt") == 0) {
1598 acpi_gbl_do_not_use_xsdt = TRUE;
1599 }
1600 /* "acpi=noirq" disables ACPI interrupt routing */
1601 else if (strcmp(arg, "noirq") == 0) {
1602 acpi_noirq_set();
1603 }
1604 /* "acpi=copy_dsdt" copys DSDT */
1605 else if (strcmp(arg, "copy_dsdt") == 0) {
1606 acpi_gbl_copy_dsdt_locally = 1;
1607 }
1608 /* "acpi=nocmcff" disables FF mode for corrected errors */
1609 else if (strcmp(arg, "nocmcff") == 0) {
1610 acpi_disable_cmcff = 1;
1611 } else {
1612 /* Core will printk when we return error. */
1613 return -EINVAL;
1614 }
1615 return 0;
1616}
1617early_param("acpi", parse_acpi);
1618
1619/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1620static int __init parse_pci(char *arg)
1621{
1622 if (arg && strcmp(arg, "noacpi") == 0)
1623 acpi_disable_pci();
1624 return 0;
1625}
1626early_param("pci", parse_pci);
1627
1628int __init acpi_mps_check(void)
1629{
1630#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1631/* mptable code is not built-in*/
1632 if (acpi_disabled || acpi_noirq) {
1633 printk(KERN_WARNING "MPS support code is not built-in.\n"
1634 "Using acpi=off or acpi=noirq or pci=noacpi "
1635 "may have problem\n");
1636 return 1;
1637 }
1638#endif
1639 return 0;
1640}
1641
1642#ifdef CONFIG_X86_IO_APIC
1643static int __init parse_acpi_skip_timer_override(char *arg)
1644{
1645 acpi_skip_timer_override = 1;
1646 return 0;
1647}
1648early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1649
1650static int __init parse_acpi_use_timer_override(char *arg)
1651{
1652 acpi_use_timer_override = 1;
1653 return 0;
1654}
1655early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1656#endif /* CONFIG_X86_IO_APIC */
1657
1658static int __init setup_acpi_sci(char *s)
1659{
1660 if (!s)
1661 return -EINVAL;
1662 if (!strcmp(s, "edge"))
1663 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1664 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1665 else if (!strcmp(s, "level"))
1666 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1667 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1668 else if (!strcmp(s, "high"))
1669 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1670 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1671 else if (!strcmp(s, "low"))
1672 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1673 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1674 else
1675 return -EINVAL;
1676 return 0;
1677}
1678early_param("acpi_sci", setup_acpi_sci);
1679
1680int __acpi_acquire_global_lock(unsigned int *lock)
1681{
1682 unsigned int old, new, val;
1683 do {
1684 old = *lock;
1685 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1686 val = cmpxchg(lock, old, new);
1687 } while (unlikely (val != old));
1688 return (new < 3) ? -1 : 0;
1689}
1690
1691int __acpi_release_global_lock(unsigned int *lock)
1692{
1693 unsigned int old, new, val;
1694 do {
1695 old = *lock;
1696 new = old & ~0x3;
1697 val = cmpxchg(lock, old, new);
1698 } while (unlikely (val != old));
1699 return old & 0x1;
1700}
1701
1702void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1703{
1704 e820_add_region(addr, size, E820_ACPI);
1705 update_e820();
1706}
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
47static int __initdata acpi_force = 0;
48u32 acpi_rsdt_forced;
49int acpi_disabled;
50EXPORT_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
63int acpi_noirq; /* skip ACPI IRQ initialization */
64int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
65EXPORT_SYMBOL(acpi_pci_disabled);
66
67int acpi_lapic;
68int acpi_ioapic;
69int acpi_strict;
70
71u8 acpi_sci_flags __initdata;
72int acpi_sci_override_gsi __initdata;
73int acpi_skip_timer_override __initdata;
74int acpi_use_timer_override __initdata;
75int acpi_fix_pin2_polarity __initdata;
76
77#ifdef CONFIG_X86_LOCAL_APIC
78static 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 */
93enum 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 */
100static 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
104static 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
127static 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 */
155char *__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}
163void __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
172static 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
198static 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
218static int __init
219acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
220{
221 struct acpi_madt_local_x2apic *processor = NULL;
222
223 processor = (struct acpi_madt_local_x2apic *)header;
224
225 if (BAD_MADT_ENTRY(processor, end))
226 return -EINVAL;
227
228 acpi_table_print_madt_entry(header);
229
230#ifdef CONFIG_X86_X2APIC
231 /*
232 * We need to register disabled CPU as well to permit
233 * counting disabled CPUs. This allows us to size
234 * cpus_possible_map more accurately, to permit
235 * to not preallocating memory for all NR_CPUS
236 * when we use CPU hotplug.
237 */
238 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
239 processor->lapic_flags & ACPI_MADT_ENABLED);
240#else
241 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
242#endif
243
244 return 0;
245}
246
247static int __init
248acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
249{
250 struct acpi_madt_local_apic *processor = NULL;
251
252 processor = (struct acpi_madt_local_apic *)header;
253
254 if (BAD_MADT_ENTRY(processor, end))
255 return -EINVAL;
256
257 acpi_table_print_madt_entry(header);
258
259 /*
260 * We need to register disabled CPU as well to permit
261 * counting disabled CPUs. This allows us to size
262 * cpus_possible_map more accurately, to permit
263 * to not preallocating memory for all NR_CPUS
264 * when we use CPU hotplug.
265 */
266 acpi_register_lapic(processor->id, /* APIC ID */
267 processor->lapic_flags & ACPI_MADT_ENABLED);
268
269 return 0;
270}
271
272static int __init
273acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
274{
275 struct acpi_madt_local_sapic *processor = NULL;
276
277 processor = (struct acpi_madt_local_sapic *)header;
278
279 if (BAD_MADT_ENTRY(processor, end))
280 return -EINVAL;
281
282 acpi_table_print_madt_entry(header);
283
284 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
285 processor->lapic_flags & ACPI_MADT_ENABLED);
286
287 return 0;
288}
289
290static int __init
291acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
292 const unsigned long end)
293{
294 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
295
296 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
297
298 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
299 return -EINVAL;
300
301 acpi_lapic_addr = lapic_addr_ovr->address;
302
303 return 0;
304}
305
306static int __init
307acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
308 const unsigned long end)
309{
310 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
311
312 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
313
314 if (BAD_MADT_ENTRY(x2apic_nmi, end))
315 return -EINVAL;
316
317 acpi_table_print_madt_entry(header);
318
319 if (x2apic_nmi->lint != 1)
320 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
321
322 return 0;
323}
324
325static int __init
326acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
327{
328 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
329
330 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
331
332 if (BAD_MADT_ENTRY(lapic_nmi, end))
333 return -EINVAL;
334
335 acpi_table_print_madt_entry(header);
336
337 if (lapic_nmi->lint != 1)
338 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
339
340 return 0;
341}
342
343#endif /*CONFIG_X86_LOCAL_APIC */
344
345#ifdef CONFIG_X86_IO_APIC
346
347static int __init
348acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
349{
350 struct acpi_madt_io_apic *ioapic = NULL;
351
352 ioapic = (struct acpi_madt_io_apic *)header;
353
354 if (BAD_MADT_ENTRY(ioapic, end))
355 return -EINVAL;
356
357 acpi_table_print_madt_entry(header);
358
359 mp_register_ioapic(ioapic->id,
360 ioapic->address, ioapic->global_irq_base);
361
362 return 0;
363}
364
365/*
366 * Parse Interrupt Source Override for the ACPI SCI
367 */
368static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
369{
370 if (trigger == 0) /* compatible SCI trigger is level */
371 trigger = 3;
372
373 if (polarity == 0) /* compatible SCI polarity is low */
374 polarity = 3;
375
376 /* Command-line over-ride via acpi_sci= */
377 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
378 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
379
380 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
381 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
382
383 /*
384 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
385 * If GSI is < 16, this will update its flags,
386 * else it will create a new mp_irqs[] entry.
387 */
388 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
389
390 /*
391 * stash over-ride to indicate we've been here
392 * and for later update of acpi_gbl_FADT
393 */
394 acpi_sci_override_gsi = gsi;
395 return;
396}
397
398static int __init
399acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
400 const unsigned long end)
401{
402 struct acpi_madt_interrupt_override *intsrc = NULL;
403
404 intsrc = (struct acpi_madt_interrupt_override *)header;
405
406 if (BAD_MADT_ENTRY(intsrc, end))
407 return -EINVAL;
408
409 acpi_table_print_madt_entry(header);
410
411 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
412 acpi_sci_ioapic_setup(intsrc->source_irq,
413 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
414 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
415 intsrc->global_irq);
416 return 0;
417 }
418
419 if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
420 if (acpi_skip_timer_override) {
421 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
422 return 0;
423 }
424 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
425 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
426 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
427 }
428 }
429
430 mp_override_legacy_irq(intsrc->source_irq,
431 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
432 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
433 intsrc->global_irq);
434
435 return 0;
436}
437
438static int __init
439acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
440{
441 struct acpi_madt_nmi_source *nmi_src = NULL;
442
443 nmi_src = (struct acpi_madt_nmi_source *)header;
444
445 if (BAD_MADT_ENTRY(nmi_src, end))
446 return -EINVAL;
447
448 acpi_table_print_madt_entry(header);
449
450 /* TBD: Support nimsrc entries? */
451
452 return 0;
453}
454
455#endif /* CONFIG_X86_IO_APIC */
456
457/*
458 * acpi_pic_sci_set_trigger()
459 *
460 * use ELCR to set PIC-mode trigger type for SCI
461 *
462 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
463 * it may require Edge Trigger -- use "acpi_sci=edge"
464 *
465 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
466 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
467 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
468 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
469 */
470
471void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
472{
473 unsigned int mask = 1 << irq;
474 unsigned int old, new;
475
476 /* Real old ELCR mask */
477 old = inb(0x4d0) | (inb(0x4d1) << 8);
478
479 /*
480 * If we use ACPI to set PCI IRQs, then we should clear ELCR
481 * since we will set it correctly as we enable the PCI irq
482 * routing.
483 */
484 new = acpi_noirq ? old : 0;
485
486 /*
487 * Update SCI information in the ELCR, it isn't in the PCI
488 * routing tables..
489 */
490 switch (trigger) {
491 case 1: /* Edge - clear */
492 new &= ~mask;
493 break;
494 case 3: /* Level - set */
495 new |= mask;
496 break;
497 }
498
499 if (old == new)
500 return;
501
502 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
503 outb(new, 0x4d0);
504 outb(new >> 8, 0x4d1);
505}
506
507int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
508{
509 *irq = gsi_to_irq(gsi);
510
511#ifdef CONFIG_X86_IO_APIC
512 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
513 setup_IO_APIC_irq_extra(gsi);
514#endif
515
516 return 0;
517}
518EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
519
520int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
521{
522 if (isa_irq >= 16)
523 return -1;
524 *gsi = irq_to_gsi(isa_irq);
525 return 0;
526}
527
528static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
529 int trigger, int polarity)
530{
531#ifdef CONFIG_PCI
532 /*
533 * Make sure all (legacy) PCI IRQs are set as level-triggered.
534 */
535 if (trigger == ACPI_LEVEL_SENSITIVE)
536 eisa_set_level_irq(gsi);
537#endif
538
539 return gsi;
540}
541
542static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
543 int trigger, int polarity)
544{
545#ifdef CONFIG_X86_IO_APIC
546 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
547#endif
548
549 return gsi;
550}
551
552int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
553 int trigger, int polarity) = acpi_register_gsi_pic;
554
555/*
556 * success: return IRQ number (>=0)
557 * failure: return < 0
558 */
559int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
560{
561 unsigned int irq;
562 unsigned int plat_gsi = gsi;
563
564 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
565 irq = gsi_to_irq(plat_gsi);
566
567 return irq;
568}
569
570void __init acpi_set_irq_model_pic(void)
571{
572 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
573 __acpi_register_gsi = acpi_register_gsi_pic;
574 acpi_ioapic = 0;
575}
576
577void __init acpi_set_irq_model_ioapic(void)
578{
579 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
580 __acpi_register_gsi = acpi_register_gsi_ioapic;
581 acpi_ioapic = 1;
582}
583
584/*
585 * ACPI based hotplug support for CPU
586 */
587#ifdef CONFIG_ACPI_HOTPLUG_CPU
588#include <acpi/processor.h>
589
590static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
591{
592#ifdef CONFIG_ACPI_NUMA
593 int nid;
594
595 nid = acpi_get_node(handle);
596 if (nid == -1 || !node_online(nid))
597 return;
598 set_apicid_to_node(physid, nid);
599 numa_set_node(cpu, nid);
600#endif
601}
602
603static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
604{
605 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
606 union acpi_object *obj;
607 struct acpi_madt_local_apic *lapic;
608 cpumask_var_t tmp_map, new_map;
609 u8 physid;
610 int cpu;
611 int retval = -ENOMEM;
612
613 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
614 return -EINVAL;
615
616 if (!buffer.length || !buffer.pointer)
617 return -EINVAL;
618
619 obj = buffer.pointer;
620 if (obj->type != ACPI_TYPE_BUFFER ||
621 obj->buffer.length < sizeof(*lapic)) {
622 kfree(buffer.pointer);
623 return -EINVAL;
624 }
625
626 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
627
628 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
629 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
630 kfree(buffer.pointer);
631 return -EINVAL;
632 }
633
634 physid = lapic->id;
635
636 kfree(buffer.pointer);
637 buffer.length = ACPI_ALLOCATE_BUFFER;
638 buffer.pointer = NULL;
639
640 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
641 goto out;
642
643 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
644 goto free_tmp_map;
645
646 cpumask_copy(tmp_map, cpu_present_mask);
647 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
648
649 /*
650 * If mp_register_lapic successfully generates a new logical cpu
651 * number, then the following will get us exactly what was mapped
652 */
653 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
654 if (cpumask_empty(new_map)) {
655 printk ("Unable to map lapic to logical cpu number\n");
656 retval = -EINVAL;
657 goto free_new_map;
658 }
659
660 acpi_processor_set_pdc(handle);
661
662 cpu = cpumask_first(new_map);
663 acpi_map_cpu2node(handle, cpu, physid);
664
665 *pcpu = cpu;
666 retval = 0;
667
668free_new_map:
669 free_cpumask_var(new_map);
670free_tmp_map:
671 free_cpumask_var(tmp_map);
672out:
673 return retval;
674}
675
676/* wrapper to silence section mismatch warning */
677int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
678{
679 return _acpi_map_lsapic(handle, pcpu);
680}
681EXPORT_SYMBOL(acpi_map_lsapic);
682
683int acpi_unmap_lsapic(int cpu)
684{
685 per_cpu(x86_cpu_to_apicid, cpu) = -1;
686 set_cpu_present(cpu, false);
687 num_processors--;
688
689 return (0);
690}
691
692EXPORT_SYMBOL(acpi_unmap_lsapic);
693#endif /* CONFIG_ACPI_HOTPLUG_CPU */
694
695int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
696{
697 /* TBD */
698 return -EINVAL;
699}
700
701EXPORT_SYMBOL(acpi_register_ioapic);
702
703int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
704{
705 /* TBD */
706 return -EINVAL;
707}
708
709EXPORT_SYMBOL(acpi_unregister_ioapic);
710
711static int __init acpi_parse_sbf(struct acpi_table_header *table)
712{
713 struct acpi_table_boot *sb;
714
715 sb = (struct acpi_table_boot *)table;
716 if (!sb) {
717 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
718 return -ENODEV;
719 }
720
721 sbf_port = sb->cmos_index; /* Save CMOS port */
722
723 return 0;
724}
725
726#ifdef CONFIG_HPET_TIMER
727#include <asm/hpet.h>
728
729static struct __initdata resource *hpet_res;
730
731static int __init acpi_parse_hpet(struct acpi_table_header *table)
732{
733 struct acpi_table_hpet *hpet_tbl;
734
735 hpet_tbl = (struct acpi_table_hpet *)table;
736 if (!hpet_tbl) {
737 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
738 return -ENODEV;
739 }
740
741 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
742 printk(KERN_WARNING PREFIX "HPET timers must be located in "
743 "memory.\n");
744 return -1;
745 }
746
747 hpet_address = hpet_tbl->address.address;
748 hpet_blockid = hpet_tbl->sequence;
749
750 /*
751 * Some broken BIOSes advertise HPET at 0x0. We really do not
752 * want to allocate a resource there.
753 */
754 if (!hpet_address) {
755 printk(KERN_WARNING PREFIX
756 "HPET id: %#x base: %#lx is invalid\n",
757 hpet_tbl->id, hpet_address);
758 return 0;
759 }
760#ifdef CONFIG_X86_64
761 /*
762 * Some even more broken BIOSes advertise HPET at
763 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
764 * some noise:
765 */
766 if (hpet_address == 0xfed0000000000000UL) {
767 if (!hpet_force_user) {
768 printk(KERN_WARNING PREFIX "HPET id: %#x "
769 "base: 0xfed0000000000000 is bogus\n "
770 "try hpet=force on the kernel command line to "
771 "fix it up to 0xfed00000.\n", hpet_tbl->id);
772 hpet_address = 0;
773 return 0;
774 }
775 printk(KERN_WARNING PREFIX
776 "HPET id: %#x base: 0xfed0000000000000 fixed up "
777 "to 0xfed00000.\n", hpet_tbl->id);
778 hpet_address >>= 32;
779 }
780#endif
781 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
782 hpet_tbl->id, hpet_address);
783
784 /*
785 * Allocate and initialize the HPET firmware resource for adding into
786 * the resource tree during the lateinit timeframe.
787 */
788#define HPET_RESOURCE_NAME_SIZE 9
789 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
790
791 hpet_res->name = (void *)&hpet_res[1];
792 hpet_res->flags = IORESOURCE_MEM;
793 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
794 hpet_tbl->sequence);
795
796 hpet_res->start = hpet_address;
797 hpet_res->end = hpet_address + (1 * 1024) - 1;
798
799 return 0;
800}
801
802/*
803 * hpet_insert_resource inserts the HPET resources used into the resource
804 * tree.
805 */
806static __init int hpet_insert_resource(void)
807{
808 if (!hpet_res)
809 return 1;
810
811 return insert_resource(&iomem_resource, hpet_res);
812}
813
814late_initcall(hpet_insert_resource);
815
816#else
817#define acpi_parse_hpet NULL
818#endif
819
820static int __init acpi_parse_fadt(struct acpi_table_header *table)
821{
822
823#ifdef CONFIG_X86_PM_TIMER
824 /* detect the location of the ACPI PM Timer */
825 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
826 /* FADT rev. 2 */
827 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
828 ACPI_ADR_SPACE_SYSTEM_IO)
829 return 0;
830
831 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
832 /*
833 * "X" fields are optional extensions to the original V1.0
834 * fields, so we must selectively expand V1.0 fields if the
835 * corresponding X field is zero.
836 */
837 if (!pmtmr_ioport)
838 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
839 } else {
840 /* FADT rev. 1 */
841 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
842 }
843 if (pmtmr_ioport)
844 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
845 pmtmr_ioport);
846#endif
847 return 0;
848}
849
850#ifdef CONFIG_X86_LOCAL_APIC
851/*
852 * Parse LAPIC entries in MADT
853 * returns 0 on success, < 0 on error
854 */
855
856static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
857{
858 int count;
859
860 if (!cpu_has_apic)
861 return -ENODEV;
862
863 /*
864 * Note that the LAPIC address is obtained from the MADT (32-bit value)
865 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
866 */
867
868 count =
869 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
870 acpi_parse_lapic_addr_ovr, 0);
871 if (count < 0) {
872 printk(KERN_ERR PREFIX
873 "Error parsing LAPIC address override entry\n");
874 return count;
875 }
876
877 register_lapic_address(acpi_lapic_addr);
878
879 return count;
880}
881
882static int __init acpi_parse_madt_lapic_entries(void)
883{
884 int count;
885 int x2count = 0;
886
887 if (!cpu_has_apic)
888 return -ENODEV;
889
890 /*
891 * Note that the LAPIC address is obtained from the MADT (32-bit value)
892 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
893 */
894
895 count =
896 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
897 acpi_parse_lapic_addr_ovr, 0);
898 if (count < 0) {
899 printk(KERN_ERR PREFIX
900 "Error parsing LAPIC address override entry\n");
901 return count;
902 }
903
904 register_lapic_address(acpi_lapic_addr);
905
906 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
907 acpi_parse_sapic, MAX_LOCAL_APIC);
908
909 if (!count) {
910 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
911 acpi_parse_x2apic, MAX_LOCAL_APIC);
912 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
913 acpi_parse_lapic, MAX_LOCAL_APIC);
914 }
915 if (!count && !x2count) {
916 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
917 /* TBD: Cleanup to allow fallback to MPS */
918 return -ENODEV;
919 } else if (count < 0 || x2count < 0) {
920 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
921 /* TBD: Cleanup to allow fallback to MPS */
922 return count;
923 }
924
925 x2count =
926 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
927 acpi_parse_x2apic_nmi, 0);
928 count =
929 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
930 if (count < 0 || x2count < 0) {
931 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
932 /* TBD: Cleanup to allow fallback to MPS */
933 return count;
934 }
935 return 0;
936}
937#endif /* CONFIG_X86_LOCAL_APIC */
938
939#ifdef CONFIG_X86_IO_APIC
940#define MP_ISA_BUS 0
941
942#ifdef CONFIG_X86_ES7000
943extern int es7000_plat;
944#endif
945
946void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
947{
948 int ioapic;
949 int pin;
950 struct mpc_intsrc mp_irq;
951
952 /*
953 * Convert 'gsi' to 'ioapic.pin'.
954 */
955 ioapic = mp_find_ioapic(gsi);
956 if (ioapic < 0)
957 return;
958 pin = mp_find_ioapic_pin(ioapic, gsi);
959
960 /*
961 * TBD: This check is for faulty timer entries, where the override
962 * erroneously sets the trigger to level, resulting in a HUGE
963 * increase of timer interrupts!
964 */
965 if ((bus_irq == 0) && (trigger == 3))
966 trigger = 1;
967
968 mp_irq.type = MP_INTSRC;
969 mp_irq.irqtype = mp_INT;
970 mp_irq.irqflag = (trigger << 2) | polarity;
971 mp_irq.srcbus = MP_ISA_BUS;
972 mp_irq.srcbusirq = bus_irq; /* IRQ */
973 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
974 mp_irq.dstirq = pin; /* INTIN# */
975
976 mp_save_irq(&mp_irq);
977
978 isa_irq_to_gsi[bus_irq] = gsi;
979}
980
981void __init mp_config_acpi_legacy_irqs(void)
982{
983 int i;
984 struct mpc_intsrc mp_irq;
985
986#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
987 /*
988 * Fabricate the legacy ISA bus (bus #31).
989 */
990 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
991#endif
992 set_bit(MP_ISA_BUS, mp_bus_not_pci);
993 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
994
995#ifdef CONFIG_X86_ES7000
996 /*
997 * Older generations of ES7000 have no legacy identity mappings
998 */
999 if (es7000_plat == 1)
1000 return;
1001#endif
1002
1003 /*
1004 * Use the default configuration for the IRQs 0-15. Unless
1005 * overridden by (MADT) interrupt source override entries.
1006 */
1007 for (i = 0; i < 16; i++) {
1008 int ioapic, pin;
1009 unsigned int dstapic;
1010 int idx;
1011 u32 gsi;
1012
1013 /* Locate the gsi that irq i maps to. */
1014 if (acpi_isa_irq_to_gsi(i, &gsi))
1015 continue;
1016
1017 /*
1018 * Locate the IOAPIC that manages the ISA IRQ.
1019 */
1020 ioapic = mp_find_ioapic(gsi);
1021 if (ioapic < 0)
1022 continue;
1023 pin = mp_find_ioapic_pin(ioapic, gsi);
1024 dstapic = mpc_ioapic_id(ioapic);
1025
1026 for (idx = 0; idx < mp_irq_entries; idx++) {
1027 struct mpc_intsrc *irq = mp_irqs + idx;
1028
1029 /* Do we already have a mapping for this ISA IRQ? */
1030 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1031 break;
1032
1033 /* Do we already have a mapping for this IOAPIC pin */
1034 if (irq->dstapic == dstapic && irq->dstirq == pin)
1035 break;
1036 }
1037
1038 if (idx != mp_irq_entries) {
1039 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1040 continue; /* IRQ already used */
1041 }
1042
1043 mp_irq.type = MP_INTSRC;
1044 mp_irq.irqflag = 0; /* Conforming */
1045 mp_irq.srcbus = MP_ISA_BUS;
1046 mp_irq.dstapic = dstapic;
1047 mp_irq.irqtype = mp_INT;
1048 mp_irq.srcbusirq = i; /* Identity mapped */
1049 mp_irq.dstirq = pin;
1050
1051 mp_save_irq(&mp_irq);
1052 }
1053}
1054
1055static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1056 int polarity)
1057{
1058#ifdef CONFIG_X86_MPPARSE
1059 struct mpc_intsrc mp_irq;
1060 struct pci_dev *pdev;
1061 unsigned char number;
1062 unsigned int devfn;
1063 int ioapic;
1064 u8 pin;
1065
1066 if (!acpi_ioapic)
1067 return 0;
1068 if (!dev)
1069 return 0;
1070 if (dev->bus != &pci_bus_type)
1071 return 0;
1072
1073 pdev = to_pci_dev(dev);
1074 number = pdev->bus->number;
1075 devfn = pdev->devfn;
1076 pin = pdev->pin;
1077 /* print the entry should happen on mptable identically */
1078 mp_irq.type = MP_INTSRC;
1079 mp_irq.irqtype = mp_INT;
1080 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1081 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1082 mp_irq.srcbus = number;
1083 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1084 ioapic = mp_find_ioapic(gsi);
1085 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1086 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1087
1088 mp_save_irq(&mp_irq);
1089#endif
1090 return 0;
1091}
1092
1093int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1094{
1095 int ioapic;
1096 int ioapic_pin;
1097 struct io_apic_irq_attr irq_attr;
1098
1099 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1100 return gsi;
1101
1102 /* Don't set up the ACPI SCI because it's already set up */
1103 if (acpi_gbl_FADT.sci_interrupt == gsi)
1104 return gsi;
1105
1106 ioapic = mp_find_ioapic(gsi);
1107 if (ioapic < 0) {
1108 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1109 return gsi;
1110 }
1111
1112 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1113
1114 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1115 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1116 "%d-%d\n", mpc_ioapic_id(ioapic),
1117 ioapic_pin);
1118 return gsi;
1119 }
1120
1121 if (enable_update_mptable)
1122 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1123
1124 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1125 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1126 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1127 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1128
1129 return gsi;
1130}
1131
1132/*
1133 * Parse IOAPIC related entries in MADT
1134 * returns 0 on success, < 0 on error
1135 */
1136static int __init acpi_parse_madt_ioapic_entries(void)
1137{
1138 int count;
1139
1140 /*
1141 * ACPI interpreter is required to complete interrupt setup,
1142 * so if it is off, don't enumerate the io-apics with ACPI.
1143 * If MPS is present, it will handle them,
1144 * otherwise the system will stay in PIC mode
1145 */
1146 if (acpi_disabled || acpi_noirq)
1147 return -ENODEV;
1148
1149 if (!cpu_has_apic)
1150 return -ENODEV;
1151
1152 /*
1153 * if "noapic" boot option, don't look for IO-APICs
1154 */
1155 if (skip_ioapic_setup) {
1156 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1157 "due to 'noapic' option.\n");
1158 return -ENODEV;
1159 }
1160
1161 count =
1162 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1163 MAX_IO_APICS);
1164 if (!count) {
1165 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1166 return -ENODEV;
1167 } else if (count < 0) {
1168 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1169 return count;
1170 }
1171
1172 count =
1173 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1174 nr_irqs);
1175 if (count < 0) {
1176 printk(KERN_ERR PREFIX
1177 "Error parsing interrupt source overrides entry\n");
1178 /* TBD: Cleanup to allow fallback to MPS */
1179 return count;
1180 }
1181
1182 /*
1183 * If BIOS did not supply an INT_SRC_OVR for the SCI
1184 * pretend we got one so we can set the SCI flags.
1185 */
1186 if (!acpi_sci_override_gsi)
1187 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1188 acpi_gbl_FADT.sci_interrupt);
1189
1190 /* Fill in identity legacy mappings where no override */
1191 mp_config_acpi_legacy_irqs();
1192
1193 count =
1194 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1195 nr_irqs);
1196 if (count < 0) {
1197 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1198 /* TBD: Cleanup to allow fallback to MPS */
1199 return count;
1200 }
1201
1202 return 0;
1203}
1204#else
1205static inline int acpi_parse_madt_ioapic_entries(void)
1206{
1207 return -1;
1208}
1209#endif /* !CONFIG_X86_IO_APIC */
1210
1211static void __init early_acpi_process_madt(void)
1212{
1213#ifdef CONFIG_X86_LOCAL_APIC
1214 int error;
1215
1216 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1217
1218 /*
1219 * Parse MADT LAPIC entries
1220 */
1221 error = early_acpi_parse_madt_lapic_addr_ovr();
1222 if (!error) {
1223 acpi_lapic = 1;
1224 smp_found_config = 1;
1225 }
1226 if (error == -EINVAL) {
1227 /*
1228 * Dell Precision Workstation 410, 610 come here.
1229 */
1230 printk(KERN_ERR PREFIX
1231 "Invalid BIOS MADT, disabling ACPI\n");
1232 disable_acpi();
1233 }
1234 }
1235#endif
1236}
1237
1238static void __init acpi_process_madt(void)
1239{
1240#ifdef CONFIG_X86_LOCAL_APIC
1241 int error;
1242
1243 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1244
1245 /*
1246 * Parse MADT LAPIC entries
1247 */
1248 error = acpi_parse_madt_lapic_entries();
1249 if (!error) {
1250 acpi_lapic = 1;
1251
1252 /*
1253 * Parse MADT IO-APIC entries
1254 */
1255 error = acpi_parse_madt_ioapic_entries();
1256 if (!error) {
1257 acpi_set_irq_model_ioapic();
1258
1259 smp_found_config = 1;
1260 }
1261 }
1262 if (error == -EINVAL) {
1263 /*
1264 * Dell Precision Workstation 410, 610 come here.
1265 */
1266 printk(KERN_ERR PREFIX
1267 "Invalid BIOS MADT, disabling ACPI\n");
1268 disable_acpi();
1269 }
1270 } else {
1271 /*
1272 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1273 * In the event an MPS table was found, forget it.
1274 * Boot with "acpi=off" to use MPS on such a system.
1275 */
1276 if (smp_found_config) {
1277 printk(KERN_WARNING PREFIX
1278 "No APIC-table, disabling MPS\n");
1279 smp_found_config = 0;
1280 }
1281 }
1282
1283 /*
1284 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1285 * processors, where MPS only supports physical.
1286 */
1287 if (acpi_lapic && acpi_ioapic)
1288 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1289 "information\n");
1290 else if (acpi_lapic)
1291 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1292 "configuration information\n");
1293#endif
1294 return;
1295}
1296
1297static int __init disable_acpi_irq(const struct dmi_system_id *d)
1298{
1299 if (!acpi_force) {
1300 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1301 d->ident);
1302 acpi_noirq_set();
1303 }
1304 return 0;
1305}
1306
1307static int __init disable_acpi_pci(const struct dmi_system_id *d)
1308{
1309 if (!acpi_force) {
1310 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1311 d->ident);
1312 acpi_disable_pci();
1313 }
1314 return 0;
1315}
1316
1317static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1318{
1319 if (!acpi_force) {
1320 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1321 disable_acpi();
1322 } else {
1323 printk(KERN_NOTICE
1324 "Warning: DMI blacklist says broken, but acpi forced\n");
1325 }
1326 return 0;
1327}
1328
1329/*
1330 * Force ignoring BIOS IRQ0 pin2 override
1331 */
1332static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1333{
1334 /*
1335 * The ati_ixp4x0_rev() early PCI quirk should have set
1336 * the acpi_skip_timer_override flag already:
1337 */
1338 if (!acpi_skip_timer_override) {
1339 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1340 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1341 d->ident);
1342 acpi_skip_timer_override = 1;
1343 }
1344 return 0;
1345}
1346
1347/*
1348 * If your system is blacklisted here, but you find that acpi=force
1349 * works for you, please contact linux-acpi@vger.kernel.org
1350 */
1351static struct dmi_system_id __initdata acpi_dmi_table[] = {
1352 /*
1353 * Boxes that need ACPI disabled
1354 */
1355 {
1356 .callback = dmi_disable_acpi,
1357 .ident = "IBM Thinkpad",
1358 .matches = {
1359 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1360 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1361 },
1362 },
1363
1364 /*
1365 * Boxes that need ACPI PCI IRQ routing disabled
1366 */
1367 {
1368 .callback = disable_acpi_irq,
1369 .ident = "ASUS A7V",
1370 .matches = {
1371 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1372 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1373 /* newer BIOS, Revision 1011, does work */
1374 DMI_MATCH(DMI_BIOS_VERSION,
1375 "ASUS A7V ACPI BIOS Revision 1007"),
1376 },
1377 },
1378 {
1379 /*
1380 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1381 * for LPC bridge, which is needed for the PCI
1382 * interrupt links to work. DSDT fix is in bug 5966.
1383 * 2645, 2646 model numbers are shared with 600/600E/600X
1384 */
1385 .callback = disable_acpi_irq,
1386 .ident = "IBM Thinkpad 600 Series 2645",
1387 .matches = {
1388 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1389 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1390 },
1391 },
1392 {
1393 .callback = disable_acpi_irq,
1394 .ident = "IBM Thinkpad 600 Series 2646",
1395 .matches = {
1396 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1397 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1398 },
1399 },
1400 /*
1401 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1402 */
1403 { /* _BBN 0 bug */
1404 .callback = disable_acpi_pci,
1405 .ident = "ASUS PR-DLS",
1406 .matches = {
1407 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1408 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1409 DMI_MATCH(DMI_BIOS_VERSION,
1410 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1411 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1412 },
1413 },
1414 {
1415 .callback = disable_acpi_pci,
1416 .ident = "Acer TravelMate 36x Laptop",
1417 .matches = {
1418 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1419 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1420 },
1421 },
1422 {}
1423};
1424
1425/* second table for DMI checks that should run after early-quirks */
1426static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1427 /*
1428 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1429 * which includes some code which overrides all temperature
1430 * trip points to 16C if the INTIN2 input of the I/O APIC
1431 * is enabled. This input is incorrectly designated the
1432 * ISA IRQ 0 via an interrupt source override even though
1433 * it is wired to the output of the master 8259A and INTIN0
1434 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1435 * override in that cases.
1436 */
1437 {
1438 .callback = dmi_ignore_irq0_timer_override,
1439 .ident = "HP nx6115 laptop",
1440 .matches = {
1441 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1442 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1443 },
1444 },
1445 {
1446 .callback = dmi_ignore_irq0_timer_override,
1447 .ident = "HP NX6125 laptop",
1448 .matches = {
1449 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1450 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1451 },
1452 },
1453 {
1454 .callback = dmi_ignore_irq0_timer_override,
1455 .ident = "HP NX6325 laptop",
1456 .matches = {
1457 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1458 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1459 },
1460 },
1461 {
1462 .callback = dmi_ignore_irq0_timer_override,
1463 .ident = "HP 6715b laptop",
1464 .matches = {
1465 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1466 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1467 },
1468 },
1469 {}
1470};
1471
1472/*
1473 * acpi_boot_table_init() and acpi_boot_init()
1474 * called from setup_arch(), always.
1475 * 1. checksums all tables
1476 * 2. enumerates lapics
1477 * 3. enumerates io-apics
1478 *
1479 * acpi_table_init() is separate to allow reading SRAT without
1480 * other side effects.
1481 *
1482 * side effects of acpi_boot_init:
1483 * acpi_lapic = 1 if LAPIC found
1484 * acpi_ioapic = 1 if IOAPIC found
1485 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1486 * if acpi_blacklisted() acpi_disabled = 1;
1487 * acpi_irq_model=...
1488 * ...
1489 */
1490
1491void __init acpi_boot_table_init(void)
1492{
1493 dmi_check_system(acpi_dmi_table);
1494
1495 /*
1496 * If acpi_disabled, bail out
1497 */
1498 if (acpi_disabled)
1499 return;
1500
1501 /*
1502 * Initialize the ACPI boot-time table parser.
1503 */
1504 if (acpi_table_init()) {
1505 disable_acpi();
1506 return;
1507 }
1508
1509 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1510
1511 /*
1512 * blacklist may disable ACPI entirely
1513 */
1514 if (acpi_blacklisted()) {
1515 if (acpi_force) {
1516 printk(KERN_WARNING PREFIX "acpi=force override\n");
1517 } else {
1518 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1519 disable_acpi();
1520 return;
1521 }
1522 }
1523}
1524
1525int __init early_acpi_boot_init(void)
1526{
1527 /*
1528 * If acpi_disabled, bail out
1529 */
1530 if (acpi_disabled)
1531 return 1;
1532
1533 /*
1534 * Process the Multiple APIC Description Table (MADT), if present
1535 */
1536 early_acpi_process_madt();
1537
1538 return 0;
1539}
1540
1541int __init acpi_boot_init(void)
1542{
1543 /* those are executed after early-quirks are executed */
1544 dmi_check_system(acpi_dmi_table_late);
1545
1546 /*
1547 * If acpi_disabled, bail out
1548 */
1549 if (acpi_disabled)
1550 return 1;
1551
1552 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1553
1554 /*
1555 * set sci_int and PM timer address
1556 */
1557 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1558
1559 /*
1560 * Process the Multiple APIC Description Table (MADT), if present
1561 */
1562 acpi_process_madt();
1563
1564 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1565
1566 if (!acpi_noirq)
1567 x86_init.pci.init = pci_acpi_init;
1568
1569 return 0;
1570}
1571
1572static int __init parse_acpi(char *arg)
1573{
1574 if (!arg)
1575 return -EINVAL;
1576
1577 /* "acpi=off" disables both ACPI table parsing and interpreter */
1578 if (strcmp(arg, "off") == 0) {
1579 disable_acpi();
1580 }
1581 /* acpi=force to over-ride black-list */
1582 else if (strcmp(arg, "force") == 0) {
1583 acpi_force = 1;
1584 acpi_disabled = 0;
1585 }
1586 /* acpi=strict disables out-of-spec workarounds */
1587 else if (strcmp(arg, "strict") == 0) {
1588 acpi_strict = 1;
1589 }
1590 /* acpi=rsdt use RSDT instead of XSDT */
1591 else if (strcmp(arg, "rsdt") == 0) {
1592 acpi_rsdt_forced = 1;
1593 }
1594 /* "acpi=noirq" disables ACPI interrupt routing */
1595 else if (strcmp(arg, "noirq") == 0) {
1596 acpi_noirq_set();
1597 }
1598 /* "acpi=copy_dsdt" copys DSDT */
1599 else if (strcmp(arg, "copy_dsdt") == 0) {
1600 acpi_gbl_copy_dsdt_locally = 1;
1601 } else {
1602 /* Core will printk when we return error. */
1603 return -EINVAL;
1604 }
1605 return 0;
1606}
1607early_param("acpi", parse_acpi);
1608
1609/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1610static int __init parse_pci(char *arg)
1611{
1612 if (arg && strcmp(arg, "noacpi") == 0)
1613 acpi_disable_pci();
1614 return 0;
1615}
1616early_param("pci", parse_pci);
1617
1618int __init acpi_mps_check(void)
1619{
1620#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1621/* mptable code is not built-in*/
1622 if (acpi_disabled || acpi_noirq) {
1623 printk(KERN_WARNING "MPS support code is not built-in.\n"
1624 "Using acpi=off or acpi=noirq or pci=noacpi "
1625 "may have problem\n");
1626 return 1;
1627 }
1628#endif
1629 return 0;
1630}
1631
1632#ifdef CONFIG_X86_IO_APIC
1633static int __init parse_acpi_skip_timer_override(char *arg)
1634{
1635 acpi_skip_timer_override = 1;
1636 return 0;
1637}
1638early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1639
1640static int __init parse_acpi_use_timer_override(char *arg)
1641{
1642 acpi_use_timer_override = 1;
1643 return 0;
1644}
1645early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1646#endif /* CONFIG_X86_IO_APIC */
1647
1648static int __init setup_acpi_sci(char *s)
1649{
1650 if (!s)
1651 return -EINVAL;
1652 if (!strcmp(s, "edge"))
1653 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1654 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1655 else if (!strcmp(s, "level"))
1656 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1657 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1658 else if (!strcmp(s, "high"))
1659 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1660 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1661 else if (!strcmp(s, "low"))
1662 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1663 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1664 else
1665 return -EINVAL;
1666 return 0;
1667}
1668early_param("acpi_sci", setup_acpi_sci);
1669
1670int __acpi_acquire_global_lock(unsigned int *lock)
1671{
1672 unsigned int old, new, val;
1673 do {
1674 old = *lock;
1675 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1676 val = cmpxchg(lock, old, new);
1677 } while (unlikely (val != old));
1678 return (new < 3) ? -1 : 0;
1679}
1680
1681int __acpi_release_global_lock(unsigned int *lock)
1682{
1683 unsigned int old, new, val;
1684 do {
1685 old = *lock;
1686 new = old & ~0x3;
1687 val = cmpxchg(lock, old, new);
1688 } while (unlikely (val != old));
1689 return old & 0x1;
1690}