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WIP FPC-III support
[linux/fpc-iii.git] / arch / x86 / kernel / acpi / boot.c
blob7bdc0239a9435a131cfe8dda7b8d28ed97956696
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
4 *
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
7 */
8
9 #include <linux/init.h>
10 #include <linux/acpi.h>
11 #include <linux/acpi_pmtmr.h>
12 #include <linux/efi.h>
13 #include <linux/cpumask.h>
14 #include <linux/export.h>
15 #include <linux/dmi.h>
16 #include <linux/irq.h>
17 #include <linux/slab.h>
18 #include <linux/memblock.h>
19 #include <linux/ioport.h>
20 #include <linux/pci.h>
21 #include <linux/efi-bgrt.h>
22 #include <linux/serial_core.h>
23 #include <linux/pgtable.h>
24
25 #include <asm/e820/api.h>
26 #include <asm/irqdomain.h>
27 #include <asm/pci_x86.h>
28 #include <asm/io_apic.h>
29 #include <asm/apic.h>
30 #include <asm/io.h>
31 #include <asm/mpspec.h>
32 #include <asm/smp.h>
33 #include <asm/i8259.h>
34 #include <asm/setup.h>
35
36 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
37 static int __initdata acpi_force = 0;
38 int acpi_disabled;
39 EXPORT_SYMBOL(acpi_disabled);
40
41 #ifdef CONFIG_X86_64
42 # include <asm/proto.h>
43 #endif /* X86 */
44
45 #define PREFIX "ACPI: "
46
47 int acpi_noirq; /* skip ACPI IRQ initialization */
48 static int acpi_nobgrt; /* skip ACPI BGRT */
49 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
50 EXPORT_SYMBOL(acpi_pci_disabled);
51
52 int acpi_lapic;
53 int acpi_ioapic;
54 int acpi_strict;
55 int acpi_disable_cmcff;
56
57 /* ACPI SCI override configuration */
58 u8 acpi_sci_flags __initdata;
59 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
60 int acpi_skip_timer_override __initdata;
61 int acpi_use_timer_override __initdata;
62 int acpi_fix_pin2_polarity __initdata;
63
64 #ifdef CONFIG_X86_LOCAL_APIC
65 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
66 #endif
67
68 #ifdef CONFIG_X86_IO_APIC
69 /*
70 * Locks related to IOAPIC hotplug
71 * Hotplug side:
72 * ->device_hotplug_lock
73 * ->acpi_ioapic_lock
74 * ->ioapic_lock
75 * Interrupt mapping side:
76 * ->acpi_ioapic_lock
77 * ->ioapic_mutex
78 * ->ioapic_lock
79 */
80 static DEFINE_MUTEX(acpi_ioapic_lock);
81 #endif
82
83 /* --------------------------------------------------------------------------
84 Boot-time Configuration
85 -------------------------------------------------------------------------- */
86
87 /*
88 * The default interrupt routing model is PIC (8259). This gets
89 * overridden if IOAPICs are enumerated (below).
90 */
91 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
92
93
94 /*
95 * ISA irqs by default are the first 16 gsis but can be
96 * any gsi as specified by an interrupt source override.
97 */
98 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
99 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
100 };
101
102 /*
103 * This is just a simple wrapper around early_memremap(),
104 * with sanity checks for phys == 0 and size == 0.
105 */
106 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
107 {
108
109 if (!phys || !size)
110 return NULL;
111
112 return early_memremap(phys, size);
113 }
114
115 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
116 {
117 if (!map || !size)
118 return;
119
120 early_memunmap(map, size);
121 }
122
123 #ifdef CONFIG_X86_LOCAL_APIC
124 static int __init acpi_parse_madt(struct acpi_table_header *table)
125 {
126 struct acpi_table_madt *madt = NULL;
127
128 if (!boot_cpu_has(X86_FEATURE_APIC))
129 return -EINVAL;
130
131 madt = (struct acpi_table_madt *)table;
132 if (!madt) {
133 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
134 return -ENODEV;
135 }
136
137 if (madt->address) {
138 acpi_lapic_addr = (u64) madt->address;
139
140 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
141 madt->address);
142 }
143
144 default_acpi_madt_oem_check(madt->header.oem_id,
145 madt->header.oem_table_id);
146
147 return 0;
148 }
149
150 /**
151 * acpi_register_lapic - register a local apic and generates a logic cpu number
152 * @id: local apic id to register
153 * @acpiid: ACPI id to register
154 * @enabled: this cpu is enabled or not
155 *
156 * Returns the logic cpu number which maps to the local apic
157 */
158 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
159 {
160 unsigned int ver = 0;
161 int cpu;
162
163 if (id >= MAX_LOCAL_APIC) {
164 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
165 return -EINVAL;
166 }
167
168 if (!enabled) {
169 ++disabled_cpus;
170 return -EINVAL;
171 }
172
173 if (boot_cpu_physical_apicid != -1U)
174 ver = boot_cpu_apic_version;
175
176 cpu = generic_processor_info(id, ver);
177 if (cpu >= 0)
178 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
179
180 return cpu;
181 }
182
183 static int __init
184 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
185 {
186 struct acpi_madt_local_x2apic *processor = NULL;
187 #ifdef CONFIG_X86_X2APIC
188 u32 apic_id;
189 u8 enabled;
190 #endif
191
192 processor = (struct acpi_madt_local_x2apic *)header;
193
194 if (BAD_MADT_ENTRY(processor, end))
195 return -EINVAL;
196
197 acpi_table_print_madt_entry(&header->common);
198
199 #ifdef CONFIG_X86_X2APIC
200 apic_id = processor->local_apic_id;
201 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
202
203 /* Ignore invalid ID */
204 if (apic_id == 0xffffffff)
205 return 0;
206
207 /*
208 * We need to register disabled CPU as well to permit
209 * counting disabled CPUs. This allows us to size
210 * cpus_possible_map more accurately, to permit
211 * to not preallocating memory for all NR_CPUS
212 * when we use CPU hotplug.
213 */
214 if (!apic->apic_id_valid(apic_id)) {
215 if (enabled)
216 pr_warn(PREFIX "x2apic entry ignored\n");
217 return 0;
218 }
219
220 acpi_register_lapic(apic_id, processor->uid, enabled);
221 #else
222 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
223 #endif
224
225 return 0;
226 }
227
228 static int __init
229 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
230 {
231 struct acpi_madt_local_apic *processor = NULL;
232
233 processor = (struct acpi_madt_local_apic *)header;
234
235 if (BAD_MADT_ENTRY(processor, end))
236 return -EINVAL;
237
238 acpi_table_print_madt_entry(&header->common);
239
240 /* Ignore invalid ID */
241 if (processor->id == 0xff)
242 return 0;
243
244 /*
245 * We need to register disabled CPU as well to permit
246 * counting disabled CPUs. This allows us to size
247 * cpus_possible_map more accurately, to permit
248 * to not preallocating memory for all NR_CPUS
249 * when we use CPU hotplug.
250 */
251 acpi_register_lapic(processor->id, /* APIC ID */
252 processor->processor_id, /* ACPI ID */
253 processor->lapic_flags & ACPI_MADT_ENABLED);
254
255 return 0;
256 }
257
258 static int __init
259 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
260 {
261 struct acpi_madt_local_sapic *processor = NULL;
262
263 processor = (struct acpi_madt_local_sapic *)header;
264
265 if (BAD_MADT_ENTRY(processor, end))
266 return -EINVAL;
267
268 acpi_table_print_madt_entry(&header->common);
269
270 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
271 processor->processor_id, /* ACPI ID */
272 processor->lapic_flags & ACPI_MADT_ENABLED);
273
274 return 0;
275 }
276
277 static int __init
278 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
279 const unsigned long end)
280 {
281 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
282
283 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
284
285 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
286 return -EINVAL;
287
288 acpi_table_print_madt_entry(&header->common);
289
290 acpi_lapic_addr = lapic_addr_ovr->address;
291
292 return 0;
293 }
294
295 static int __init
296 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
297 const unsigned long end)
298 {
299 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
300
301 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
302
303 if (BAD_MADT_ENTRY(x2apic_nmi, end))
304 return -EINVAL;
305
306 acpi_table_print_madt_entry(&header->common);
307
308 if (x2apic_nmi->lint != 1)
309 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
310
311 return 0;
312 }
313
314 static int __init
315 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
316 {
317 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
318
319 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
320
321 if (BAD_MADT_ENTRY(lapic_nmi, end))
322 return -EINVAL;
323
324 acpi_table_print_madt_entry(&header->common);
325
326 if (lapic_nmi->lint != 1)
327 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
328
329 return 0;
330 }
331
332 #endif /*CONFIG_X86_LOCAL_APIC */
333
334 #ifdef CONFIG_X86_IO_APIC
335 #define MP_ISA_BUS 0
336
337 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
338 u8 trigger, u32 gsi);
339
340 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
341 u32 gsi)
342 {
343 /*
344 * Check bus_irq boundary.
345 */
346 if (bus_irq >= NR_IRQS_LEGACY) {
347 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
348 return;
349 }
350
351 /*
352 * TBD: This check is for faulty timer entries, where the override
353 * erroneously sets the trigger to level, resulting in a HUGE
354 * increase of timer interrupts!
355 */
356 if ((bus_irq == 0) && (trigger == 3))
357 trigger = 1;
358
359 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
360 return;
361 /*
362 * Reset default identity mapping if gsi is also an legacy IRQ,
363 * otherwise there will be more than one entry with the same GSI
364 * and acpi_isa_irq_to_gsi() may give wrong result.
365 */
366 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
367 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
368 isa_irq_to_gsi[bus_irq] = gsi;
369 }
370
371 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
372 int polarity)
373 {
374 #ifdef CONFIG_X86_MPPARSE
375 struct mpc_intsrc mp_irq;
376 struct pci_dev *pdev;
377 unsigned char number;
378 unsigned int devfn;
379 int ioapic;
380 u8 pin;
381
382 if (!acpi_ioapic)
383 return 0;
384 if (!dev || !dev_is_pci(dev))
385 return 0;
386
387 pdev = to_pci_dev(dev);
388 number = pdev->bus->number;
389 devfn = pdev->devfn;
390 pin = pdev->pin;
391 /* print the entry should happen on mptable identically */
392 mp_irq.type = MP_INTSRC;
393 mp_irq.irqtype = mp_INT;
394 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
395 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
396 mp_irq.srcbus = number;
397 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
398 ioapic = mp_find_ioapic(gsi);
399 mp_irq.dstapic = mpc_ioapic_id(ioapic);
400 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
401
402 mp_save_irq(&mp_irq);
403 #endif
404 return 0;
405 }
406
407 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
408 u8 trigger, u32 gsi)
409 {
410 struct mpc_intsrc mp_irq;
411 int ioapic, pin;
412
413 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
414 ioapic = mp_find_ioapic(gsi);
415 if (ioapic < 0) {
416 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
417 return ioapic;
418 }
419
420 pin = mp_find_ioapic_pin(ioapic, gsi);
421
422 mp_irq.type = MP_INTSRC;
423 mp_irq.irqtype = mp_INT;
424 mp_irq.irqflag = (trigger << 2) | polarity;
425 mp_irq.srcbus = MP_ISA_BUS;
426 mp_irq.srcbusirq = bus_irq;
427 mp_irq.dstapic = mpc_ioapic_id(ioapic);
428 mp_irq.dstirq = pin;
429
430 mp_save_irq(&mp_irq);
431
432 return 0;
433 }
434
435 static int __init
436 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
437 {
438 struct acpi_madt_io_apic *ioapic = NULL;
439 struct ioapic_domain_cfg cfg = {
440 .type = IOAPIC_DOMAIN_DYNAMIC,
441 .ops = &mp_ioapic_irqdomain_ops,
442 };
443
444 ioapic = (struct acpi_madt_io_apic *)header;
445
446 if (BAD_MADT_ENTRY(ioapic, end))
447 return -EINVAL;
448
449 acpi_table_print_madt_entry(&header->common);
450
451 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
452 if (ioapic->global_irq_base < nr_legacy_irqs())
453 cfg.type = IOAPIC_DOMAIN_LEGACY;
454
455 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
456 &cfg);
457
458 return 0;
459 }
460
461 /*
462 * Parse Interrupt Source Override for the ACPI SCI
463 */
464 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
465 {
466 if (trigger == 0) /* compatible SCI trigger is level */
467 trigger = 3;
468
469 if (polarity == 0) /* compatible SCI polarity is low */
470 polarity = 3;
471
472 /* Command-line over-ride via acpi_sci= */
473 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
474 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
475
476 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
477 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
478
479 if (bus_irq < NR_IRQS_LEGACY)
480 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
481 else
482 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
483
484 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
485
486 /*
487 * stash over-ride to indicate we've been here
488 * and for later update of acpi_gbl_FADT
489 */
490 acpi_sci_override_gsi = gsi;
491 return;
492 }
493
494 static int __init
495 acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
496 const unsigned long end)
497 {
498 struct acpi_madt_interrupt_override *intsrc = NULL;
499
500 intsrc = (struct acpi_madt_interrupt_override *)header;
501
502 if (BAD_MADT_ENTRY(intsrc, end))
503 return -EINVAL;
504
505 acpi_table_print_madt_entry(&header->common);
506
507 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
508 acpi_sci_ioapic_setup(intsrc->source_irq,
509 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
510 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
511 intsrc->global_irq);
512 return 0;
513 }
514
515 if (intsrc->source_irq == 0) {
516 if (acpi_skip_timer_override) {
517 printk(PREFIX "BIOS IRQ0 override ignored.\n");
518 return 0;
519 }
520
521 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
522 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
523 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
524 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
525 }
526 }
527
528 mp_override_legacy_irq(intsrc->source_irq,
529 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
530 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
531 intsrc->global_irq);
532
533 return 0;
534 }
535
536 static int __init
537 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
538 {
539 struct acpi_madt_nmi_source *nmi_src = NULL;
540
541 nmi_src = (struct acpi_madt_nmi_source *)header;
542
543 if (BAD_MADT_ENTRY(nmi_src, end))
544 return -EINVAL;
545
546 acpi_table_print_madt_entry(&header->common);
547
548 /* TBD: Support nimsrc entries? */
549
550 return 0;
551 }
552
553 #endif /* CONFIG_X86_IO_APIC */
554
555 /*
556 * acpi_pic_sci_set_trigger()
557 *
558 * use ELCR to set PIC-mode trigger type for SCI
559 *
560 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
561 * it may require Edge Trigger -- use "acpi_sci=edge"
562 *
563 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
564 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
565 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
566 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
567 */
568
569 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
570 {
571 unsigned int mask = 1 << irq;
572 unsigned int old, new;
573
574 /* Real old ELCR mask */
575 old = inb(0x4d0) | (inb(0x4d1) << 8);
576
577 /*
578 * If we use ACPI to set PCI IRQs, then we should clear ELCR
579 * since we will set it correctly as we enable the PCI irq
580 * routing.
581 */
582 new = acpi_noirq ? old : 0;
583
584 /*
585 * Update SCI information in the ELCR, it isn't in the PCI
586 * routing tables..
587 */
588 switch (trigger) {
589 case 1: /* Edge - clear */
590 new &= ~mask;
591 break;
592 case 3: /* Level - set */
593 new |= mask;
594 break;
595 }
596
597 if (old == new)
598 return;
599
600 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
601 outb(new, 0x4d0);
602 outb(new >> 8, 0x4d1);
603 }
604
605 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
606 {
607 int rc, irq, trigger, polarity;
608
609 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
610 *irqp = gsi;
611 return 0;
612 }
613
614 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
615 if (rc)
616 return rc;
617
618 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
619 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
620 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
621 if (irq < 0)
622 return irq;
623
624 *irqp = irq;
625 return 0;
626 }
627 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
628
629 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
630 {
631 if (isa_irq < nr_legacy_irqs() &&
632 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
633 *gsi = isa_irq_to_gsi[isa_irq];
634 return 0;
635 }
636
637 return -1;
638 }
639
640 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
641 int trigger, int polarity)
642 {
643 #ifdef CONFIG_PCI
644 /*
645 * Make sure all (legacy) PCI IRQs are set as level-triggered.
646 */
647 if (trigger == ACPI_LEVEL_SENSITIVE)
648 elcr_set_level_irq(gsi);
649 #endif
650
651 return gsi;
652 }
653
654 #ifdef CONFIG_X86_LOCAL_APIC
655 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
656 int trigger, int polarity)
657 {
658 int irq = gsi;
659 #ifdef CONFIG_X86_IO_APIC
660 int node;
661 struct irq_alloc_info info;
662
663 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
664 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
665 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
666 ioapic_set_alloc_attr(&info, node, trigger, polarity);
667
668 mutex_lock(&acpi_ioapic_lock);
669 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
670 /* Don't set up the ACPI SCI because it's already set up */
671 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
672 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
673 mutex_unlock(&acpi_ioapic_lock);
674 #endif
675
676 return irq;
677 }
678
679 static void acpi_unregister_gsi_ioapic(u32 gsi)
680 {
681 #ifdef CONFIG_X86_IO_APIC
682 int irq;
683
684 mutex_lock(&acpi_ioapic_lock);
685 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
686 if (irq > 0)
687 mp_unmap_irq(irq);
688 mutex_unlock(&acpi_ioapic_lock);
689 #endif
690 }
691 #endif
692
693 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
694 int trigger, int polarity) = acpi_register_gsi_pic;
695 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
696
697 #ifdef CONFIG_ACPI_SLEEP
698 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
699 #else
700 int (*acpi_suspend_lowlevel)(void);
701 #endif
702
703 /*
704 * success: return IRQ number (>=0)
705 * failure: return < 0
706 */
707 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
708 {
709 return __acpi_register_gsi(dev, gsi, trigger, polarity);
710 }
711 EXPORT_SYMBOL_GPL(acpi_register_gsi);
712
713 void acpi_unregister_gsi(u32 gsi)
714 {
715 if (__acpi_unregister_gsi)
716 __acpi_unregister_gsi(gsi);
717 }
718 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
719
720 #ifdef CONFIG_X86_LOCAL_APIC
721 static void __init acpi_set_irq_model_ioapic(void)
722 {
723 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
724 __acpi_register_gsi = acpi_register_gsi_ioapic;
725 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
726 acpi_ioapic = 1;
727 }
728 #endif
729
730 /*
731 * ACPI based hotplug support for CPU
732 */
733 #ifdef CONFIG_ACPI_HOTPLUG_CPU
734 #include <acpi/processor.h>
735
736 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
737 {
738 #ifdef CONFIG_ACPI_NUMA
739 int nid;
740
741 nid = acpi_get_node(handle);
742 if (nid != NUMA_NO_NODE) {
743 set_apicid_to_node(physid, nid);
744 numa_set_node(cpu, nid);
745 }
746 #endif
747 return 0;
748 }
749
750 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
751 int *pcpu)
752 {
753 int cpu;
754
755 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
756 if (cpu < 0) {
757 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
758 return cpu;
759 }
760
761 acpi_processor_set_pdc(handle);
762 acpi_map_cpu2node(handle, cpu, physid);
763
764 *pcpu = cpu;
765 return 0;
766 }
767 EXPORT_SYMBOL(acpi_map_cpu);
768
769 int acpi_unmap_cpu(int cpu)
770 {
771 #ifdef CONFIG_ACPI_NUMA
772 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
773 #endif
774
775 per_cpu(x86_cpu_to_apicid, cpu) = -1;
776 set_cpu_present(cpu, false);
777 num_processors--;
778
779 return (0);
780 }
781 EXPORT_SYMBOL(acpi_unmap_cpu);
782 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
783
784 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
785 {
786 int ret = -ENOSYS;
787 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
788 int ioapic_id;
789 u64 addr;
790 struct ioapic_domain_cfg cfg = {
791 .type = IOAPIC_DOMAIN_DYNAMIC,
792 .ops = &mp_ioapic_irqdomain_ops,
793 };
794
795 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
796 if (ioapic_id < 0) {
797 unsigned long long uid;
798 acpi_status status;
799
800 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
801 NULL, &uid);
802 if (ACPI_FAILURE(status)) {
803 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
804 return -EINVAL;
805 }
806 ioapic_id = (int)uid;
807 }
808
809 mutex_lock(&acpi_ioapic_lock);
810 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
811 mutex_unlock(&acpi_ioapic_lock);
812 #endif
813
814 return ret;
815 }
816 EXPORT_SYMBOL(acpi_register_ioapic);
817
818 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
819 {
820 int ret = -ENOSYS;
821
822 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
823 mutex_lock(&acpi_ioapic_lock);
824 ret = mp_unregister_ioapic(gsi_base);
825 mutex_unlock(&acpi_ioapic_lock);
826 #endif
827
828 return ret;
829 }
830 EXPORT_SYMBOL(acpi_unregister_ioapic);
831
832 /**
833 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
834 * has been registered
835 * @handle: ACPI handle of the IOAPIC device
836 * @gsi_base: GSI base associated with the IOAPIC
837 *
838 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
839 * with acpi_register_ioapic()/acpi_unregister_ioapic().
840 */
841 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
842 {
843 int ret = 0;
844
845 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
846 mutex_lock(&acpi_ioapic_lock);
847 ret = mp_ioapic_registered(gsi_base);
848 mutex_unlock(&acpi_ioapic_lock);
849 #endif
850
851 return ret;
852 }
853
854 static int __init acpi_parse_sbf(struct acpi_table_header *table)
855 {
856 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
857
858 sbf_port = sb->cmos_index; /* Save CMOS port */
859
860 return 0;
861 }
862
863 #ifdef CONFIG_HPET_TIMER
864 #include <asm/hpet.h>
865
866 static struct resource *hpet_res __initdata;
867
868 static int __init acpi_parse_hpet(struct acpi_table_header *table)
869 {
870 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
871
872 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
873 printk(KERN_WARNING PREFIX "HPET timers must be located in "
874 "memory.\n");
875 return -1;
876 }
877
878 hpet_address = hpet_tbl->address.address;
879 hpet_blockid = hpet_tbl->sequence;
880
881 /*
882 * Some broken BIOSes advertise HPET at 0x0. We really do not
883 * want to allocate a resource there.
884 */
885 if (!hpet_address) {
886 printk(KERN_WARNING PREFIX
887 "HPET id: %#x base: %#lx is invalid\n",
888 hpet_tbl->id, hpet_address);
889 return 0;
890 }
891 #ifdef CONFIG_X86_64
892 /*
893 * Some even more broken BIOSes advertise HPET at
894 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
895 * some noise:
896 */
897 if (hpet_address == 0xfed0000000000000UL) {
898 if (!hpet_force_user) {
899 printk(KERN_WARNING PREFIX "HPET id: %#x "
900 "base: 0xfed0000000000000 is bogus\n "
901 "try hpet=force on the kernel command line to "
902 "fix it up to 0xfed00000.\n", hpet_tbl->id);
903 hpet_address = 0;
904 return 0;
905 }
906 printk(KERN_WARNING PREFIX
907 "HPET id: %#x base: 0xfed0000000000000 fixed up "
908 "to 0xfed00000.\n", hpet_tbl->id);
909 hpet_address >>= 32;
910 }
911 #endif
912 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
913 hpet_tbl->id, hpet_address);
914
915 /*
916 * Allocate and initialize the HPET firmware resource for adding into
917 * the resource tree during the lateinit timeframe.
918 */
919 #define HPET_RESOURCE_NAME_SIZE 9
920 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
921 SMP_CACHE_BYTES);
922 if (!hpet_res)
923 panic("%s: Failed to allocate %zu bytes\n", __func__,
924 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
925
926 hpet_res->name = (void *)&hpet_res[1];
927 hpet_res->flags = IORESOURCE_MEM;
928 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
929 hpet_tbl->sequence);
930
931 hpet_res->start = hpet_address;
932 hpet_res->end = hpet_address + (1 * 1024) - 1;
933
934 return 0;
935 }
936
937 /*
938 * hpet_insert_resource inserts the HPET resources used into the resource
939 * tree.
940 */
941 static __init int hpet_insert_resource(void)
942 {
943 if (!hpet_res)
944 return 1;
945
946 return insert_resource(&iomem_resource, hpet_res);
947 }
948
949 late_initcall(hpet_insert_resource);
950
951 #else
952 #define acpi_parse_hpet NULL
953 #endif
954
955 static int __init acpi_parse_fadt(struct acpi_table_header *table)
956 {
957 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
958 pr_debug("ACPI: no legacy devices present\n");
959 x86_platform.legacy.devices.pnpbios = 0;
960 }
961
962 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
963 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
964 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
965 pr_debug("ACPI: i8042 controller is absent\n");
966 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
967 }
968
969 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
970 pr_debug("ACPI: not registering RTC platform device\n");
971 x86_platform.legacy.rtc = 0;
972 }
973
974 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
975 pr_debug("ACPI: probing for VGA not safe\n");
976 x86_platform.legacy.no_vga = 1;
977 }
978
979 #ifdef CONFIG_X86_PM_TIMER
980 /* detect the location of the ACPI PM Timer */
981 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
982 /* FADT rev. 2 */
983 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
984 ACPI_ADR_SPACE_SYSTEM_IO)
985 return 0;
986
987 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
988 /*
989 * "X" fields are optional extensions to the original V1.0
990 * fields, so we must selectively expand V1.0 fields if the
991 * corresponding X field is zero.
992 */
993 if (!pmtmr_ioport)
994 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
995 } else {
996 /* FADT rev. 1 */
997 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
998 }
999 if (pmtmr_ioport)
1000 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1001 pmtmr_ioport);
1002 #endif
1003 return 0;
1004 }
1005
1006 #ifdef CONFIG_X86_LOCAL_APIC
1007 /*
1008 * Parse LAPIC entries in MADT
1009 * returns 0 on success, < 0 on error
1010 */
1011
1012 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1013 {
1014 int count;
1015
1016 if (!boot_cpu_has(X86_FEATURE_APIC))
1017 return -ENODEV;
1018
1019 /*
1020 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1021 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1022 */
1023
1024 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1025 acpi_parse_lapic_addr_ovr, 0);
1026 if (count < 0) {
1027 printk(KERN_ERR PREFIX
1028 "Error parsing LAPIC address override entry\n");
1029 return count;
1030 }
1031
1032 register_lapic_address(acpi_lapic_addr);
1033
1034 return count;
1035 }
1036
1037 static int __init acpi_parse_madt_lapic_entries(void)
1038 {
1039 int count;
1040 int x2count = 0;
1041 int ret;
1042 struct acpi_subtable_proc madt_proc[2];
1043
1044 if (!boot_cpu_has(X86_FEATURE_APIC))
1045 return -ENODEV;
1046
1047 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1048 acpi_parse_sapic, MAX_LOCAL_APIC);
1049
1050 if (!count) {
1051 memset(madt_proc, 0, sizeof(madt_proc));
1052 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1053 madt_proc[0].handler = acpi_parse_lapic;
1054 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1055 madt_proc[1].handler = acpi_parse_x2apic;
1056 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1057 sizeof(struct acpi_table_madt),
1058 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1059 if (ret < 0) {
1060 printk(KERN_ERR PREFIX
1061 "Error parsing LAPIC/X2APIC entries\n");
1062 return ret;
1063 }
1064
1065 count = madt_proc[0].count;
1066 x2count = madt_proc[1].count;
1067 }
1068 if (!count && !x2count) {
1069 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1070 /* TBD: Cleanup to allow fallback to MPS */
1071 return -ENODEV;
1072 } else if (count < 0 || x2count < 0) {
1073 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1074 /* TBD: Cleanup to allow fallback to MPS */
1075 return count;
1076 }
1077
1078 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1079 acpi_parse_x2apic_nmi, 0);
1080 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1081 acpi_parse_lapic_nmi, 0);
1082 if (count < 0 || x2count < 0) {
1083 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1084 /* TBD: Cleanup to allow fallback to MPS */
1085 return count;
1086 }
1087 return 0;
1088 }
1089 #endif /* CONFIG_X86_LOCAL_APIC */
1090
1091 #ifdef CONFIG_X86_IO_APIC
1092 static void __init mp_config_acpi_legacy_irqs(void)
1093 {
1094 int i;
1095 struct mpc_intsrc mp_irq;
1096
1097 #ifdef CONFIG_EISA
1098 /*
1099 * Fabricate the legacy ISA bus (bus #31).
1100 */
1101 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1102 #endif
1103 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1104 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1105
1106 /*
1107 * Use the default configuration for the IRQs 0-15. Unless
1108 * overridden by (MADT) interrupt source override entries.
1109 */
1110 for (i = 0; i < nr_legacy_irqs(); i++) {
1111 int ioapic, pin;
1112 unsigned int dstapic;
1113 int idx;
1114 u32 gsi;
1115
1116 /* Locate the gsi that irq i maps to. */
1117 if (acpi_isa_irq_to_gsi(i, &gsi))
1118 continue;
1119
1120 /*
1121 * Locate the IOAPIC that manages the ISA IRQ.
1122 */
1123 ioapic = mp_find_ioapic(gsi);
1124 if (ioapic < 0)
1125 continue;
1126 pin = mp_find_ioapic_pin(ioapic, gsi);
1127 dstapic = mpc_ioapic_id(ioapic);
1128
1129 for (idx = 0; idx < mp_irq_entries; idx++) {
1130 struct mpc_intsrc *irq = mp_irqs + idx;
1131
1132 /* Do we already have a mapping for this ISA IRQ? */
1133 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1134 break;
1135
1136 /* Do we already have a mapping for this IOAPIC pin */
1137 if (irq->dstapic == dstapic && irq->dstirq == pin)
1138 break;
1139 }
1140
1141 if (idx != mp_irq_entries) {
1142 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1143 continue; /* IRQ already used */
1144 }
1145
1146 mp_irq.type = MP_INTSRC;
1147 mp_irq.irqflag = 0; /* Conforming */
1148 mp_irq.srcbus = MP_ISA_BUS;
1149 mp_irq.dstapic = dstapic;
1150 mp_irq.irqtype = mp_INT;
1151 mp_irq.srcbusirq = i; /* Identity mapped */
1152 mp_irq.dstirq = pin;
1153
1154 mp_save_irq(&mp_irq);
1155 }
1156 }
1157
1158 /*
1159 * Parse IOAPIC related entries in MADT
1160 * returns 0 on success, < 0 on error
1161 */
1162 static int __init acpi_parse_madt_ioapic_entries(void)
1163 {
1164 int count;
1165
1166 /*
1167 * ACPI interpreter is required to complete interrupt setup,
1168 * so if it is off, don't enumerate the io-apics with ACPI.
1169 * If MPS is present, it will handle them,
1170 * otherwise the system will stay in PIC mode
1171 */
1172 if (acpi_disabled || acpi_noirq)
1173 return -ENODEV;
1174
1175 if (!boot_cpu_has(X86_FEATURE_APIC))
1176 return -ENODEV;
1177
1178 /*
1179 * if "noapic" boot option, don't look for IO-APICs
1180 */
1181 if (skip_ioapic_setup) {
1182 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1183 "due to 'noapic' option.\n");
1184 return -ENODEV;
1185 }
1186
1187 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1188 MAX_IO_APICS);
1189 if (!count) {
1190 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1191 return -ENODEV;
1192 } else if (count < 0) {
1193 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1194 return count;
1195 }
1196
1197 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1198 acpi_parse_int_src_ovr, nr_irqs);
1199 if (count < 0) {
1200 printk(KERN_ERR PREFIX
1201 "Error parsing interrupt source overrides entry\n");
1202 /* TBD: Cleanup to allow fallback to MPS */
1203 return count;
1204 }
1205
1206 /*
1207 * If BIOS did not supply an INT_SRC_OVR for the SCI
1208 * pretend we got one so we can set the SCI flags.
1209 * But ignore setting up SCI on hardware reduced platforms.
1210 */
1211 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1212 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1213 acpi_gbl_FADT.sci_interrupt);
1214
1215 /* Fill in identity legacy mappings where no override */
1216 mp_config_acpi_legacy_irqs();
1217
1218 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1219 acpi_parse_nmi_src, nr_irqs);
1220 if (count < 0) {
1221 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1222 /* TBD: Cleanup to allow fallback to MPS */
1223 return count;
1224 }
1225
1226 return 0;
1227 }
1228 #else
1229 static inline int acpi_parse_madt_ioapic_entries(void)
1230 {
1231 return -1;
1232 }
1233 #endif /* !CONFIG_X86_IO_APIC */
1234
1235 static void __init early_acpi_process_madt(void)
1236 {
1237 #ifdef CONFIG_X86_LOCAL_APIC
1238 int error;
1239
1240 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1241
1242 /*
1243 * Parse MADT LAPIC entries
1244 */
1245 error = early_acpi_parse_madt_lapic_addr_ovr();
1246 if (!error) {
1247 acpi_lapic = 1;
1248 smp_found_config = 1;
1249 }
1250 if (error == -EINVAL) {
1251 /*
1252 * Dell Precision Workstation 410, 610 come here.
1253 */
1254 printk(KERN_ERR PREFIX
1255 "Invalid BIOS MADT, disabling ACPI\n");
1256 disable_acpi();
1257 }
1258 }
1259 #endif
1260 }
1261
1262 static void __init acpi_process_madt(void)
1263 {
1264 #ifdef CONFIG_X86_LOCAL_APIC
1265 int error;
1266
1267 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1268
1269 /*
1270 * Parse MADT LAPIC entries
1271 */
1272 error = acpi_parse_madt_lapic_entries();
1273 if (!error) {
1274 acpi_lapic = 1;
1275
1276 /*
1277 * Parse MADT IO-APIC entries
1278 */
1279 mutex_lock(&acpi_ioapic_lock);
1280 error = acpi_parse_madt_ioapic_entries();
1281 mutex_unlock(&acpi_ioapic_lock);
1282 if (!error) {
1283 acpi_set_irq_model_ioapic();
1284
1285 smp_found_config = 1;
1286 }
1287 }
1288 if (error == -EINVAL) {
1289 /*
1290 * Dell Precision Workstation 410, 610 come here.
1291 */
1292 printk(KERN_ERR PREFIX
1293 "Invalid BIOS MADT, disabling ACPI\n");
1294 disable_acpi();
1295 }
1296 } else {
1297 /*
1298 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1299 * In the event an MPS table was found, forget it.
1300 * Boot with "acpi=off" to use MPS on such a system.
1301 */
1302 if (smp_found_config) {
1303 printk(KERN_WARNING PREFIX
1304 "No APIC-table, disabling MPS\n");
1305 smp_found_config = 0;
1306 }
1307 }
1308
1309 /*
1310 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1311 * processors, where MPS only supports physical.
1312 */
1313 if (acpi_lapic && acpi_ioapic)
1314 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1315 "information\n");
1316 else if (acpi_lapic)
1317 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1318 "configuration information\n");
1319 #endif
1320 return;
1321 }
1322
1323 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1324 {
1325 if (!acpi_force) {
1326 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1327 d->ident);
1328 acpi_noirq_set();
1329 }
1330 return 0;
1331 }
1332
1333 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1334 {
1335 if (!acpi_force) {
1336 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1337 d->ident);
1338 acpi_disable_pci();
1339 }
1340 return 0;
1341 }
1342
1343 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1344 {
1345 if (!acpi_force) {
1346 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1347 disable_acpi();
1348 } else {
1349 printk(KERN_NOTICE
1350 "Warning: DMI blacklist says broken, but acpi forced\n");
1351 }
1352 return 0;
1353 }
1354
1355 /*
1356 * Force ignoring BIOS IRQ0 override
1357 */
1358 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1359 {
1360 if (!acpi_skip_timer_override) {
1361 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1362 d->ident);
1363 acpi_skip_timer_override = 1;
1364 }
1365 return 0;
1366 }
1367
1368 /*
1369 * ACPI offers an alternative platform interface model that removes
1370 * ACPI hardware requirements for platforms that do not implement
1371 * the PC Architecture.
1372 *
1373 * We initialize the Hardware-reduced ACPI model here:
1374 */
1375 void __init acpi_generic_reduced_hw_init(void)
1376 {
1377 /*
1378 * Override x86_init functions and bypass legacy PIC in
1379 * hardware reduced ACPI mode.
1380 */
1381 x86_init.timers.timer_init = x86_init_noop;
1382 x86_init.irqs.pre_vector_init = x86_init_noop;
1383 legacy_pic = &null_legacy_pic;
1384 }
1385
1386 static void __init acpi_reduced_hw_init(void)
1387 {
1388 if (acpi_gbl_reduced_hardware)
1389 x86_init.acpi.reduced_hw_early_init();
1390 }
1391
1392 /*
1393 * If your system is blacklisted here, but you find that acpi=force
1394 * works for you, please contact linux-acpi@vger.kernel.org
1395 */
1396 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1397 /*
1398 * Boxes that need ACPI disabled
1399 */
1400 {
1401 .callback = dmi_disable_acpi,
1402 .ident = "IBM Thinkpad",
1403 .matches = {
1404 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1405 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1406 },
1407 },
1408
1409 /*
1410 * Boxes that need ACPI PCI IRQ routing disabled
1411 */
1412 {
1413 .callback = disable_acpi_irq,
1414 .ident = "ASUS A7V",
1415 .matches = {
1416 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1417 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1418 /* newer BIOS, Revision 1011, does work */
1419 DMI_MATCH(DMI_BIOS_VERSION,
1420 "ASUS A7V ACPI BIOS Revision 1007"),
1421 },
1422 },
1423 {
1424 /*
1425 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1426 * for LPC bridge, which is needed for the PCI
1427 * interrupt links to work. DSDT fix is in bug 5966.
1428 * 2645, 2646 model numbers are shared with 600/600E/600X
1429 */
1430 .callback = disable_acpi_irq,
1431 .ident = "IBM Thinkpad 600 Series 2645",
1432 .matches = {
1433 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1434 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1435 },
1436 },
1437 {
1438 .callback = disable_acpi_irq,
1439 .ident = "IBM Thinkpad 600 Series 2646",
1440 .matches = {
1441 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1442 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1443 },
1444 },
1445 /*
1446 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1447 */
1448 { /* _BBN 0 bug */
1449 .callback = disable_acpi_pci,
1450 .ident = "ASUS PR-DLS",
1451 .matches = {
1452 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1453 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1454 DMI_MATCH(DMI_BIOS_VERSION,
1455 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1456 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1457 },
1458 },
1459 {
1460 .callback = disable_acpi_pci,
1461 .ident = "Acer TravelMate 36x Laptop",
1462 .matches = {
1463 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1465 },
1466 },
1467 {}
1468 };
1469
1470 /* second table for DMI checks that should run after early-quirks */
1471 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1472 /*
1473 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1474 * which includes some code which overrides all temperature
1475 * trip points to 16C if the INTIN2 input of the I/O APIC
1476 * is enabled. This input is incorrectly designated the
1477 * ISA IRQ 0 via an interrupt source override even though
1478 * it is wired to the output of the master 8259A and INTIN0
1479 * is not connected at all. Force ignoring BIOS IRQ0
1480 * override in that cases.
1481 */
1482 {
1483 .callback = dmi_ignore_irq0_timer_override,
1484 .ident = "HP nx6115 laptop",
1485 .matches = {
1486 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1487 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1488 },
1489 },
1490 {
1491 .callback = dmi_ignore_irq0_timer_override,
1492 .ident = "HP NX6125 laptop",
1493 .matches = {
1494 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1495 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1496 },
1497 },
1498 {
1499 .callback = dmi_ignore_irq0_timer_override,
1500 .ident = "HP NX6325 laptop",
1501 .matches = {
1502 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1503 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1504 },
1505 },
1506 {
1507 .callback = dmi_ignore_irq0_timer_override,
1508 .ident = "HP 6715b laptop",
1509 .matches = {
1510 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1511 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1512 },
1513 },
1514 {
1515 .callback = dmi_ignore_irq0_timer_override,
1516 .ident = "FUJITSU SIEMENS",
1517 .matches = {
1518 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1519 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1520 },
1521 },
1522 {}
1523 };
1524
1525 /*
1526 * acpi_boot_table_init() and acpi_boot_init()
1527 * called from setup_arch(), always.
1528 * 1. checksums all tables
1529 * 2. enumerates lapics
1530 * 3. enumerates io-apics
1531 *
1532 * acpi_table_init() is separate to allow reading SRAT without
1533 * other side effects.
1534 *
1535 * side effects of acpi_boot_init:
1536 * acpi_lapic = 1 if LAPIC found
1537 * acpi_ioapic = 1 if IOAPIC found
1538 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1539 * if acpi_blacklisted() acpi_disabled = 1;
1540 * acpi_irq_model=...
1541 * ...
1542 */
1543
1544 void __init acpi_boot_table_init(void)
1545 {
1546 dmi_check_system(acpi_dmi_table);
1547
1548 /*
1549 * If acpi_disabled, bail out
1550 */
1551 if (acpi_disabled)
1552 return;
1553
1554 /*
1555 * Initialize the ACPI boot-time table parser.
1556 */
1557 if (acpi_table_init()) {
1558 disable_acpi();
1559 return;
1560 }
1561
1562 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1563
1564 /*
1565 * blacklist may disable ACPI entirely
1566 */
1567 if (acpi_blacklisted()) {
1568 if (acpi_force) {
1569 printk(KERN_WARNING PREFIX "acpi=force override\n");
1570 } else {
1571 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1572 disable_acpi();
1573 return;
1574 }
1575 }
1576 }
1577
1578 int __init early_acpi_boot_init(void)
1579 {
1580 /*
1581 * If acpi_disabled, bail out
1582 */
1583 if (acpi_disabled)
1584 return 1;
1585
1586 /*
1587 * Process the Multiple APIC Description Table (MADT), if present
1588 */
1589 early_acpi_process_madt();
1590
1591 /*
1592 * Hardware-reduced ACPI mode initialization:
1593 */
1594 acpi_reduced_hw_init();
1595
1596 return 0;
1597 }
1598
1599 int __init acpi_boot_init(void)
1600 {
1601 /* those are executed after early-quirks are executed */
1602 dmi_check_system(acpi_dmi_table_late);
1603
1604 /*
1605 * If acpi_disabled, bail out
1606 */
1607 if (acpi_disabled)
1608 return 1;
1609
1610 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1611
1612 /*
1613 * set sci_int and PM timer address
1614 */
1615 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1616
1617 /*
1618 * Process the Multiple APIC Description Table (MADT), if present
1619 */
1620 acpi_process_madt();
1621
1622 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1623 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1624 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1625
1626 if (!acpi_noirq)
1627 x86_init.pci.init = pci_acpi_init;
1628
1629 /* Do not enable ACPI SPCR console by default */
1630 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1631 return 0;
1632 }
1633
1634 static int __init parse_acpi(char *arg)
1635 {
1636 if (!arg)
1637 return -EINVAL;
1638
1639 /* "acpi=off" disables both ACPI table parsing and interpreter */
1640 if (strcmp(arg, "off") == 0) {
1641 disable_acpi();
1642 }
1643 /* acpi=force to over-ride black-list */
1644 else if (strcmp(arg, "force") == 0) {
1645 acpi_force = 1;
1646 acpi_disabled = 0;
1647 }
1648 /* acpi=strict disables out-of-spec workarounds */
1649 else if (strcmp(arg, "strict") == 0) {
1650 acpi_strict = 1;
1651 }
1652 /* acpi=rsdt use RSDT instead of XSDT */
1653 else if (strcmp(arg, "rsdt") == 0) {
1654 acpi_gbl_do_not_use_xsdt = TRUE;
1655 }
1656 /* "acpi=noirq" disables ACPI interrupt routing */
1657 else if (strcmp(arg, "noirq") == 0) {
1658 acpi_noirq_set();
1659 }
1660 /* "acpi=copy_dsdt" copys DSDT */
1661 else if (strcmp(arg, "copy_dsdt") == 0) {
1662 acpi_gbl_copy_dsdt_locally = 1;
1663 }
1664 /* "acpi=nocmcff" disables FF mode for corrected errors */
1665 else if (strcmp(arg, "nocmcff") == 0) {
1666 acpi_disable_cmcff = 1;
1667 } else {
1668 /* Core will printk when we return error. */
1669 return -EINVAL;
1670 }
1671 return 0;
1672 }
1673 early_param("acpi", parse_acpi);
1674
1675 static int __init parse_acpi_bgrt(char *arg)
1676 {
1677 acpi_nobgrt = true;
1678 return 0;
1679 }
1680 early_param("bgrt_disable", parse_acpi_bgrt);
1681
1682 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1683 static int __init parse_pci(char *arg)
1684 {
1685 if (arg && strcmp(arg, "noacpi") == 0)
1686 acpi_disable_pci();
1687 return 0;
1688 }
1689 early_param("pci", parse_pci);
1690
1691 int __init acpi_mps_check(void)
1692 {
1693 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1694 /* mptable code is not built-in*/
1695 if (acpi_disabled || acpi_noirq) {
1696 printk(KERN_WARNING "MPS support code is not built-in.\n"
1697 "Using acpi=off or acpi=noirq or pci=noacpi "
1698 "may have problem\n");
1699 return 1;
1700 }
1701 #endif
1702 return 0;
1703 }
1704
1705 #ifdef CONFIG_X86_IO_APIC
1706 static int __init parse_acpi_skip_timer_override(char *arg)
1707 {
1708 acpi_skip_timer_override = 1;
1709 return 0;
1710 }
1711 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1712
1713 static int __init parse_acpi_use_timer_override(char *arg)
1714 {
1715 acpi_use_timer_override = 1;
1716 return 0;
1717 }
1718 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1719 #endif /* CONFIG_X86_IO_APIC */
1720
1721 static int __init setup_acpi_sci(char *s)
1722 {
1723 if (!s)
1724 return -EINVAL;
1725 if (!strcmp(s, "edge"))
1726 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1727 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1728 else if (!strcmp(s, "level"))
1729 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1730 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1731 else if (!strcmp(s, "high"))
1732 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1733 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1734 else if (!strcmp(s, "low"))
1735 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1736 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1737 else
1738 return -EINVAL;
1739 return 0;
1740 }
1741 early_param("acpi_sci", setup_acpi_sci);
1742
1743 int __acpi_acquire_global_lock(unsigned int *lock)
1744 {
1745 unsigned int old, new, val;
1746 do {
1747 old = *lock;
1748 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1749 val = cmpxchg(lock, old, new);
1750 } while (unlikely (val != old));
1751 return ((new & 0x3) < 3) ? -1 : 0;
1752 }
1753
1754 int __acpi_release_global_lock(unsigned int *lock)
1755 {
1756 unsigned int old, new, val;
1757 do {
1758 old = *lock;
1759 new = old & ~0x3;
1760 val = cmpxchg(lock, old, new);
1761 } while (unlikely (val != old));
1762 return old & 0x1;
1763 }
1764
1765 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1766 {
1767 e820__range_add(addr, size, E820_TYPE_ACPI);
1768 e820__update_table_print();
1769 }
1770
1771 void x86_default_set_root_pointer(u64 addr)
1772 {
1773 boot_params.acpi_rsdp_addr = addr;
1774 }
1775
1776 u64 x86_default_get_root_pointer(void)
1777 {
1778 return boot_params.acpi_rsdp_addr;
1779 }
Linux with added FPC-III support