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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}
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#define pr_fmt(fmt) "ACPI: " fmt
9
10#include <linux/init.h>
11#include <linux/acpi.h>
12#include <linux/acpi_pmtmr.h>
13#include <linux/efi.h>
14#include <linux/cpumask.h>
15#include <linux/export.h>
16#include <linux/dmi.h>
17#include <linux/irq.h>
18#include <linux/slab.h>
19#include <linux/memblock.h>
20#include <linux/ioport.h>
21#include <linux/pci.h>
22#include <linux/efi-bgrt.h>
23#include <linux/serial_core.h>
24#include <linux/pgtable.h>
25
26#include <asm/e820/api.h>
27#include <asm/irqdomain.h>
28#include <asm/pci_x86.h>
29#include <asm/io_apic.h>
30#include <asm/apic.h>
31#include <asm/io.h>
32#include <asm/mpspec.h>
33#include <asm/smp.h>
34#include <asm/i8259.h>
35#include <asm/setup.h>
36
37#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
38static int __initdata acpi_force = 0;
39int acpi_disabled;
40EXPORT_SYMBOL(acpi_disabled);
41
42#ifdef CONFIG_X86_64
43# include <asm/proto.h>
44#endif /* X86 */
45
46int acpi_noirq; /* skip ACPI IRQ initialization */
47static int acpi_nobgrt; /* skip ACPI BGRT */
48int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
49EXPORT_SYMBOL(acpi_pci_disabled);
50
51int acpi_lapic;
52int acpi_ioapic;
53int acpi_strict;
54int acpi_disable_cmcff;
55
56/* ACPI SCI override configuration */
57u8 acpi_sci_flags __initdata;
58u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
59int acpi_skip_timer_override __initdata;
60int acpi_use_timer_override __initdata;
61int acpi_fix_pin2_polarity __initdata;
62
63#ifdef CONFIG_X86_LOCAL_APIC
64static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
65static bool acpi_support_online_capable;
66#endif
67
68#ifdef CONFIG_X86_64
69/* Physical address of the Multiprocessor Wakeup Structure mailbox */
70static u64 acpi_mp_wake_mailbox_paddr;
71/* Virtual address of the Multiprocessor Wakeup Structure mailbox */
72static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox;
73#endif
74
75#ifdef CONFIG_X86_IO_APIC
76/*
77 * Locks related to IOAPIC hotplug
78 * Hotplug side:
79 * ->device_hotplug_lock
80 * ->acpi_ioapic_lock
81 * ->ioapic_lock
82 * Interrupt mapping side:
83 * ->acpi_ioapic_lock
84 * ->ioapic_mutex
85 * ->ioapic_lock
86 */
87static DEFINE_MUTEX(acpi_ioapic_lock);
88#endif
89
90/* --------------------------------------------------------------------------
91 Boot-time Configuration
92 -------------------------------------------------------------------------- */
93
94/*
95 * The default interrupt routing model is PIC (8259). This gets
96 * overridden if IOAPICs are enumerated (below).
97 */
98enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
99
100
101/*
102 * ISA irqs by default are the first 16 gsis but can be
103 * any gsi as specified by an interrupt source override.
104 */
105static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
106 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
107};
108
109/*
110 * This is just a simple wrapper around early_memremap(),
111 * with sanity checks for phys == 0 and size == 0.
112 */
113void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
114{
115
116 if (!phys || !size)
117 return NULL;
118
119 return early_memremap(phys, size);
120}
121
122void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
123{
124 if (!map || !size)
125 return;
126
127 early_memunmap(map, size);
128}
129
130#ifdef CONFIG_X86_LOCAL_APIC
131static int __init acpi_parse_madt(struct acpi_table_header *table)
132{
133 struct acpi_table_madt *madt = NULL;
134
135 if (!boot_cpu_has(X86_FEATURE_APIC))
136 return -EINVAL;
137
138 madt = (struct acpi_table_madt *)table;
139 if (!madt) {
140 pr_warn("Unable to map MADT\n");
141 return -ENODEV;
142 }
143
144 if (madt->address) {
145 acpi_lapic_addr = (u64) madt->address;
146
147 pr_debug("Local APIC address 0x%08x\n", madt->address);
148 }
149 if (madt->header.revision >= 5)
150 acpi_support_online_capable = true;
151
152 default_acpi_madt_oem_check(madt->header.oem_id,
153 madt->header.oem_table_id);
154
155 return 0;
156}
157
158/**
159 * acpi_register_lapic - register a local apic and generates a logic cpu number
160 * @id: local apic id to register
161 * @acpiid: ACPI id to register
162 * @enabled: this cpu is enabled or not
163 *
164 * Returns the logic cpu number which maps to the local apic
165 */
166static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
167{
168 unsigned int ver = 0;
169 int cpu;
170
171 if (id >= MAX_LOCAL_APIC) {
172 pr_info("skipped apicid that is too big\n");
173 return -EINVAL;
174 }
175
176 if (!enabled) {
177 ++disabled_cpus;
178 return -EINVAL;
179 }
180
181 if (boot_cpu_physical_apicid != -1U)
182 ver = boot_cpu_apic_version;
183
184 cpu = generic_processor_info(id, ver);
185 if (cpu >= 0)
186 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
187
188 return cpu;
189}
190
191static int __init
192acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
193{
194 struct acpi_madt_local_x2apic *processor = NULL;
195#ifdef CONFIG_X86_X2APIC
196 u32 apic_id;
197 u8 enabled;
198#endif
199
200 processor = (struct acpi_madt_local_x2apic *)header;
201
202 if (BAD_MADT_ENTRY(processor, end))
203 return -EINVAL;
204
205 acpi_table_print_madt_entry(&header->common);
206
207#ifdef CONFIG_X86_X2APIC
208 apic_id = processor->local_apic_id;
209 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
210
211 /* Ignore invalid ID */
212 if (apic_id == 0xffffffff)
213 return 0;
214
215 /*
216 * We need to register disabled CPU as well to permit
217 * counting disabled CPUs. This allows us to size
218 * cpus_possible_map more accurately, to permit
219 * to not preallocating memory for all NR_CPUS
220 * when we use CPU hotplug.
221 */
222 if (!apic->apic_id_valid(apic_id)) {
223 if (enabled)
224 pr_warn("x2apic entry ignored\n");
225 return 0;
226 }
227
228 acpi_register_lapic(apic_id, processor->uid, enabled);
229#else
230 pr_warn("x2apic entry ignored\n");
231#endif
232
233 return 0;
234}
235
236static int __init
237acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
238{
239 struct acpi_madt_local_apic *processor = NULL;
240
241 processor = (struct acpi_madt_local_apic *)header;
242
243 if (BAD_MADT_ENTRY(processor, end))
244 return -EINVAL;
245
246 acpi_table_print_madt_entry(&header->common);
247
248 /* Ignore invalid ID */
249 if (processor->id == 0xff)
250 return 0;
251
252 /* don't register processors that can not be onlined */
253 if (acpi_support_online_capable &&
254 !(processor->lapic_flags & ACPI_MADT_ENABLED) &&
255 !(processor->lapic_flags & ACPI_MADT_ONLINE_CAPABLE))
256 return 0;
257
258 /*
259 * We need to register disabled CPU as well to permit
260 * counting disabled CPUs. This allows us to size
261 * cpus_possible_map more accurately, to permit
262 * to not preallocating memory for all NR_CPUS
263 * when we use CPU hotplug.
264 */
265 acpi_register_lapic(processor->id, /* APIC ID */
266 processor->processor_id, /* ACPI ID */
267 processor->lapic_flags & ACPI_MADT_ENABLED);
268
269 return 0;
270}
271
272static int __init
273acpi_parse_sapic(union acpi_subtable_headers *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->common);
283
284 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
285 processor->processor_id, /* ACPI ID */
286 processor->lapic_flags & ACPI_MADT_ENABLED);
287
288 return 0;
289}
290
291static int __init
292acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header,
293 const unsigned long end)
294{
295 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
296
297 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
298
299 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
300 return -EINVAL;
301
302 acpi_table_print_madt_entry(&header->common);
303
304 acpi_lapic_addr = lapic_addr_ovr->address;
305
306 return 0;
307}
308
309static int __init
310acpi_parse_x2apic_nmi(union acpi_subtable_headers *header,
311 const unsigned long end)
312{
313 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
314
315 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
316
317 if (BAD_MADT_ENTRY(x2apic_nmi, end))
318 return -EINVAL;
319
320 acpi_table_print_madt_entry(&header->common);
321
322 if (x2apic_nmi->lint != 1)
323 pr_warn("NMI not connected to LINT 1!\n");
324
325 return 0;
326}
327
328static int __init
329acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end)
330{
331 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
332
333 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
334
335 if (BAD_MADT_ENTRY(lapic_nmi, end))
336 return -EINVAL;
337
338 acpi_table_print_madt_entry(&header->common);
339
340 if (lapic_nmi->lint != 1)
341 pr_warn("NMI not connected to LINT 1!\n");
342
343 return 0;
344}
345
346#ifdef CONFIG_X86_64
347static int acpi_wakeup_cpu(int apicid, unsigned long start_ip)
348{
349 /*
350 * Remap mailbox memory only for the first call to acpi_wakeup_cpu().
351 *
352 * Wakeup of secondary CPUs is fully serialized in the core code.
353 * No need to protect acpi_mp_wake_mailbox from concurrent accesses.
354 */
355 if (!acpi_mp_wake_mailbox) {
356 acpi_mp_wake_mailbox = memremap(acpi_mp_wake_mailbox_paddr,
357 sizeof(*acpi_mp_wake_mailbox),
358 MEMREMAP_WB);
359 }
360
361 /*
362 * Mailbox memory is shared between the firmware and OS. Firmware will
363 * listen on mailbox command address, and once it receives the wakeup
364 * command, the CPU associated with the given apicid will be booted.
365 *
366 * The value of 'apic_id' and 'wakeup_vector' must be visible to the
367 * firmware before the wakeup command is visible. smp_store_release()
368 * ensures ordering and visibility.
369 */
370 acpi_mp_wake_mailbox->apic_id = apicid;
371 acpi_mp_wake_mailbox->wakeup_vector = start_ip;
372 smp_store_release(&acpi_mp_wake_mailbox->command,
373 ACPI_MP_WAKE_COMMAND_WAKEUP);
374
375 /*
376 * Wait for the CPU to wake up.
377 *
378 * The CPU being woken up is essentially in a spin loop waiting to be
379 * woken up. It should not take long for it wake up and acknowledge by
380 * zeroing out ->command.
381 *
382 * ACPI specification doesn't provide any guidance on how long kernel
383 * has to wait for a wake up acknowledgement. It also doesn't provide
384 * a way to cancel a wake up request if it takes too long.
385 *
386 * In TDX environment, the VMM has control over how long it takes to
387 * wake up secondary. It can postpone scheduling secondary vCPU
388 * indefinitely. Giving up on wake up request and reporting error opens
389 * possible attack vector for VMM: it can wake up a secondary CPU when
390 * kernel doesn't expect it. Wait until positive result of the wake up
391 * request.
392 */
393 while (READ_ONCE(acpi_mp_wake_mailbox->command))
394 cpu_relax();
395
396 return 0;
397}
398#endif /* CONFIG_X86_64 */
399#endif /* CONFIG_X86_LOCAL_APIC */
400
401#ifdef CONFIG_X86_IO_APIC
402#define MP_ISA_BUS 0
403
404static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
405 u8 trigger, u32 gsi);
406
407static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
408 u32 gsi)
409{
410 /*
411 * Check bus_irq boundary.
412 */
413 if (bus_irq >= NR_IRQS_LEGACY) {
414 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
415 return;
416 }
417
418 /*
419 * TBD: This check is for faulty timer entries, where the override
420 * erroneously sets the trigger to level, resulting in a HUGE
421 * increase of timer interrupts!
422 */
423 if ((bus_irq == 0) && (trigger == 3))
424 trigger = 1;
425
426 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
427 return;
428 /*
429 * Reset default identity mapping if gsi is also an legacy IRQ,
430 * otherwise there will be more than one entry with the same GSI
431 * and acpi_isa_irq_to_gsi() may give wrong result.
432 */
433 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
434 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
435 isa_irq_to_gsi[bus_irq] = gsi;
436}
437
438static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
439 int polarity)
440{
441#ifdef CONFIG_X86_MPPARSE
442 struct mpc_intsrc mp_irq;
443 struct pci_dev *pdev;
444 unsigned char number;
445 unsigned int devfn;
446 int ioapic;
447 u8 pin;
448
449 if (!acpi_ioapic)
450 return;
451 if (!dev || !dev_is_pci(dev))
452 return;
453
454 pdev = to_pci_dev(dev);
455 number = pdev->bus->number;
456 devfn = pdev->devfn;
457 pin = pdev->pin;
458 /* print the entry should happen on mptable identically */
459 mp_irq.type = MP_INTSRC;
460 mp_irq.irqtype = mp_INT;
461 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
462 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
463 mp_irq.srcbus = number;
464 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
465 ioapic = mp_find_ioapic(gsi);
466 mp_irq.dstapic = mpc_ioapic_id(ioapic);
467 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
468
469 mp_save_irq(&mp_irq);
470#endif
471}
472
473static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
474 u8 trigger, u32 gsi)
475{
476 struct mpc_intsrc mp_irq;
477 int ioapic, pin;
478
479 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
480 ioapic = mp_find_ioapic(gsi);
481 if (ioapic < 0) {
482 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
483 return ioapic;
484 }
485
486 pin = mp_find_ioapic_pin(ioapic, gsi);
487
488 mp_irq.type = MP_INTSRC;
489 mp_irq.irqtype = mp_INT;
490 mp_irq.irqflag = (trigger << 2) | polarity;
491 mp_irq.srcbus = MP_ISA_BUS;
492 mp_irq.srcbusirq = bus_irq;
493 mp_irq.dstapic = mpc_ioapic_id(ioapic);
494 mp_irq.dstirq = pin;
495
496 mp_save_irq(&mp_irq);
497
498 return 0;
499}
500
501static int __init
502acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end)
503{
504 struct acpi_madt_io_apic *ioapic = NULL;
505 struct ioapic_domain_cfg cfg = {
506 .type = IOAPIC_DOMAIN_DYNAMIC,
507 .ops = &mp_ioapic_irqdomain_ops,
508 };
509
510 ioapic = (struct acpi_madt_io_apic *)header;
511
512 if (BAD_MADT_ENTRY(ioapic, end))
513 return -EINVAL;
514
515 acpi_table_print_madt_entry(&header->common);
516
517 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
518 if (ioapic->global_irq_base < nr_legacy_irqs())
519 cfg.type = IOAPIC_DOMAIN_LEGACY;
520
521 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
522 &cfg);
523
524 return 0;
525}
526
527/*
528 * Parse Interrupt Source Override for the ACPI SCI
529 */
530static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
531{
532 if (trigger == 0) /* compatible SCI trigger is level */
533 trigger = 3;
534
535 if (polarity == 0) /* compatible SCI polarity is low */
536 polarity = 3;
537
538 /* Command-line over-ride via acpi_sci= */
539 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
540 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
541
542 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
543 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
544
545 if (bus_irq < NR_IRQS_LEGACY)
546 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
547 else
548 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
549
550 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
551
552 /*
553 * stash over-ride to indicate we've been here
554 * and for later update of acpi_gbl_FADT
555 */
556 acpi_sci_override_gsi = gsi;
557 return;
558}
559
560static int __init
561acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
562 const unsigned long end)
563{
564 struct acpi_madt_interrupt_override *intsrc = NULL;
565
566 intsrc = (struct acpi_madt_interrupt_override *)header;
567
568 if (BAD_MADT_ENTRY(intsrc, end))
569 return -EINVAL;
570
571 acpi_table_print_madt_entry(&header->common);
572
573 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
574 acpi_sci_ioapic_setup(intsrc->source_irq,
575 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
576 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
577 intsrc->global_irq);
578 return 0;
579 }
580
581 if (intsrc->source_irq == 0) {
582 if (acpi_skip_timer_override) {
583 pr_warn("BIOS IRQ0 override ignored.\n");
584 return 0;
585 }
586
587 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
588 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
589 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
590 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
591 }
592 }
593
594 mp_override_legacy_irq(intsrc->source_irq,
595 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
596 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
597 intsrc->global_irq);
598
599 return 0;
600}
601
602static int __init
603acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end)
604{
605 struct acpi_madt_nmi_source *nmi_src = NULL;
606
607 nmi_src = (struct acpi_madt_nmi_source *)header;
608
609 if (BAD_MADT_ENTRY(nmi_src, end))
610 return -EINVAL;
611
612 acpi_table_print_madt_entry(&header->common);
613
614 /* TBD: Support nimsrc entries? */
615
616 return 0;
617}
618
619#endif /* CONFIG_X86_IO_APIC */
620
621/*
622 * acpi_pic_sci_set_trigger()
623 *
624 * use ELCR to set PIC-mode trigger type for SCI
625 *
626 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
627 * it may require Edge Trigger -- use "acpi_sci=edge"
628 *
629 * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers
630 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
631 * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
632 * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
633 */
634
635void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
636{
637 unsigned int mask = 1 << irq;
638 unsigned int old, new;
639
640 /* Real old ELCR mask */
641 old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
642
643 /*
644 * If we use ACPI to set PCI IRQs, then we should clear ELCR
645 * since we will set it correctly as we enable the PCI irq
646 * routing.
647 */
648 new = acpi_noirq ? old : 0;
649
650 /*
651 * Update SCI information in the ELCR, it isn't in the PCI
652 * routing tables..
653 */
654 switch (trigger) {
655 case 1: /* Edge - clear */
656 new &= ~mask;
657 break;
658 case 3: /* Level - set */
659 new |= mask;
660 break;
661 }
662
663 if (old == new)
664 return;
665
666 pr_warn("setting ELCR to %04x (from %04x)\n", new, old);
667 outb(new, PIC_ELCR1);
668 outb(new >> 8, PIC_ELCR2);
669}
670
671int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
672{
673 int rc, irq, trigger, polarity;
674
675 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
676 *irqp = gsi;
677 return 0;
678 }
679
680 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
681 if (rc)
682 return rc;
683
684 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
685 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
686 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
687 if (irq < 0)
688 return irq;
689
690 *irqp = irq;
691 return 0;
692}
693EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
694
695int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
696{
697 if (isa_irq < nr_legacy_irqs() &&
698 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
699 *gsi = isa_irq_to_gsi[isa_irq];
700 return 0;
701 }
702
703 return -1;
704}
705
706static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
707 int trigger, int polarity)
708{
709#ifdef CONFIG_PCI
710 /*
711 * Make sure all (legacy) PCI IRQs are set as level-triggered.
712 */
713 if (trigger == ACPI_LEVEL_SENSITIVE)
714 elcr_set_level_irq(gsi);
715#endif
716
717 return gsi;
718}
719
720#ifdef CONFIG_X86_LOCAL_APIC
721static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
722 int trigger, int polarity)
723{
724 int irq = gsi;
725#ifdef CONFIG_X86_IO_APIC
726 int node;
727 struct irq_alloc_info info;
728
729 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
730 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
731 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
732 ioapic_set_alloc_attr(&info, node, trigger, polarity);
733
734 mutex_lock(&acpi_ioapic_lock);
735 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
736 /* Don't set up the ACPI SCI because it's already set up */
737 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
738 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
739 mutex_unlock(&acpi_ioapic_lock);
740#endif
741
742 return irq;
743}
744
745static void acpi_unregister_gsi_ioapic(u32 gsi)
746{
747#ifdef CONFIG_X86_IO_APIC
748 int irq;
749
750 mutex_lock(&acpi_ioapic_lock);
751 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
752 if (irq > 0)
753 mp_unmap_irq(irq);
754 mutex_unlock(&acpi_ioapic_lock);
755#endif
756}
757#endif
758
759int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
760 int trigger, int polarity) = acpi_register_gsi_pic;
761void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
762
763#ifdef CONFIG_ACPI_SLEEP
764int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
765#else
766int (*acpi_suspend_lowlevel)(void);
767#endif
768
769/*
770 * success: return IRQ number (>=0)
771 * failure: return < 0
772 */
773int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
774{
775 return __acpi_register_gsi(dev, gsi, trigger, polarity);
776}
777EXPORT_SYMBOL_GPL(acpi_register_gsi);
778
779void acpi_unregister_gsi(u32 gsi)
780{
781 if (__acpi_unregister_gsi)
782 __acpi_unregister_gsi(gsi);
783}
784EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
785
786#ifdef CONFIG_X86_LOCAL_APIC
787static void __init acpi_set_irq_model_ioapic(void)
788{
789 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
790 __acpi_register_gsi = acpi_register_gsi_ioapic;
791 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
792 acpi_ioapic = 1;
793}
794#endif
795
796/*
797 * ACPI based hotplug support for CPU
798 */
799#ifdef CONFIG_ACPI_HOTPLUG_CPU
800#include <acpi/processor.h>
801
802static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
803{
804#ifdef CONFIG_ACPI_NUMA
805 int nid;
806
807 nid = acpi_get_node(handle);
808 if (nid != NUMA_NO_NODE) {
809 set_apicid_to_node(physid, nid);
810 numa_set_node(cpu, nid);
811 }
812#endif
813 return 0;
814}
815
816int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
817 int *pcpu)
818{
819 int cpu;
820
821 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
822 if (cpu < 0) {
823 pr_info("Unable to map lapic to logical cpu number\n");
824 return cpu;
825 }
826
827 acpi_processor_set_pdc(handle);
828 acpi_map_cpu2node(handle, cpu, physid);
829
830 *pcpu = cpu;
831 return 0;
832}
833EXPORT_SYMBOL(acpi_map_cpu);
834
835int acpi_unmap_cpu(int cpu)
836{
837#ifdef CONFIG_ACPI_NUMA
838 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
839#endif
840
841 per_cpu(x86_cpu_to_apicid, cpu) = -1;
842 set_cpu_present(cpu, false);
843 num_processors--;
844
845 return (0);
846}
847EXPORT_SYMBOL(acpi_unmap_cpu);
848#endif /* CONFIG_ACPI_HOTPLUG_CPU */
849
850int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
851{
852 int ret = -ENOSYS;
853#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
854 int ioapic_id;
855 u64 addr;
856 struct ioapic_domain_cfg cfg = {
857 .type = IOAPIC_DOMAIN_DYNAMIC,
858 .ops = &mp_ioapic_irqdomain_ops,
859 };
860
861 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
862 if (ioapic_id < 0) {
863 unsigned long long uid;
864 acpi_status status;
865
866 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
867 NULL, &uid);
868 if (ACPI_FAILURE(status)) {
869 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
870 return -EINVAL;
871 }
872 ioapic_id = (int)uid;
873 }
874
875 mutex_lock(&acpi_ioapic_lock);
876 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
877 mutex_unlock(&acpi_ioapic_lock);
878#endif
879
880 return ret;
881}
882EXPORT_SYMBOL(acpi_register_ioapic);
883
884int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
885{
886 int ret = -ENOSYS;
887
888#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
889 mutex_lock(&acpi_ioapic_lock);
890 ret = mp_unregister_ioapic(gsi_base);
891 mutex_unlock(&acpi_ioapic_lock);
892#endif
893
894 return ret;
895}
896EXPORT_SYMBOL(acpi_unregister_ioapic);
897
898/**
899 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base
900 * has been registered
901 * @handle: ACPI handle of the IOAPIC device
902 * @gsi_base: GSI base associated with the IOAPIC
903 *
904 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
905 * with acpi_register_ioapic()/acpi_unregister_ioapic().
906 */
907int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
908{
909 int ret = 0;
910
911#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
912 mutex_lock(&acpi_ioapic_lock);
913 ret = mp_ioapic_registered(gsi_base);
914 mutex_unlock(&acpi_ioapic_lock);
915#endif
916
917 return ret;
918}
919
920static int __init acpi_parse_sbf(struct acpi_table_header *table)
921{
922 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
923
924 sbf_port = sb->cmos_index; /* Save CMOS port */
925
926 return 0;
927}
928
929#ifdef CONFIG_HPET_TIMER
930#include <asm/hpet.h>
931
932static struct resource *hpet_res __initdata;
933
934static int __init acpi_parse_hpet(struct acpi_table_header *table)
935{
936 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
937
938 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
939 pr_warn("HPET timers must be located in memory.\n");
940 return -1;
941 }
942
943 hpet_address = hpet_tbl->address.address;
944 hpet_blockid = hpet_tbl->sequence;
945
946 /*
947 * Some broken BIOSes advertise HPET at 0x0. We really do not
948 * want to allocate a resource there.
949 */
950 if (!hpet_address) {
951 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address);
952 return 0;
953 }
954#ifdef CONFIG_X86_64
955 /*
956 * Some even more broken BIOSes advertise HPET at
957 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
958 * some noise:
959 */
960 if (hpet_address == 0xfed0000000000000UL) {
961 if (!hpet_force_user) {
962 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n",
963 hpet_tbl->id);
964 hpet_address = 0;
965 return 0;
966 }
967 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n",
968 hpet_tbl->id);
969 hpet_address >>= 32;
970 }
971#endif
972 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address);
973
974 /*
975 * Allocate and initialize the HPET firmware resource for adding into
976 * the resource tree during the lateinit timeframe.
977 */
978#define HPET_RESOURCE_NAME_SIZE 9
979 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
980 SMP_CACHE_BYTES);
981 if (!hpet_res)
982 panic("%s: Failed to allocate %zu bytes\n", __func__,
983 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
984
985 hpet_res->name = (void *)&hpet_res[1];
986 hpet_res->flags = IORESOURCE_MEM;
987 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
988 hpet_tbl->sequence);
989
990 hpet_res->start = hpet_address;
991 hpet_res->end = hpet_address + (1 * 1024) - 1;
992
993 return 0;
994}
995
996/*
997 * hpet_insert_resource inserts the HPET resources used into the resource
998 * tree.
999 */
1000static __init int hpet_insert_resource(void)
1001{
1002 if (!hpet_res)
1003 return 1;
1004
1005 return insert_resource(&iomem_resource, hpet_res);
1006}
1007
1008late_initcall(hpet_insert_resource);
1009
1010#else
1011#define acpi_parse_hpet NULL
1012#endif
1013
1014static int __init acpi_parse_fadt(struct acpi_table_header *table)
1015{
1016 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
1017 pr_debug("no legacy devices present\n");
1018 x86_platform.legacy.devices.pnpbios = 0;
1019 }
1020
1021 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
1022 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
1023 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
1024 pr_debug("i8042 controller is absent\n");
1025 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
1026 }
1027
1028 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
1029 pr_debug("not registering RTC platform device\n");
1030 x86_platform.legacy.rtc = 0;
1031 }
1032
1033 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
1034 pr_debug("probing for VGA not safe\n");
1035 x86_platform.legacy.no_vga = 1;
1036 }
1037
1038#ifdef CONFIG_X86_PM_TIMER
1039 /* detect the location of the ACPI PM Timer */
1040 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
1041 /* FADT rev. 2 */
1042 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
1043 ACPI_ADR_SPACE_SYSTEM_IO)
1044 return 0;
1045
1046 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
1047 /*
1048 * "X" fields are optional extensions to the original V1.0
1049 * fields, so we must selectively expand V1.0 fields if the
1050 * corresponding X field is zero.
1051 */
1052 if (!pmtmr_ioport)
1053 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1054 } else {
1055 /* FADT rev. 1 */
1056 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1057 }
1058 if (pmtmr_ioport)
1059 pr_info("PM-Timer IO Port: %#x\n", pmtmr_ioport);
1060#endif
1061 return 0;
1062}
1063
1064#ifdef CONFIG_X86_LOCAL_APIC
1065/*
1066 * Parse LAPIC entries in MADT
1067 * returns 0 on success, < 0 on error
1068 */
1069
1070static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1071{
1072 int count;
1073
1074 if (!boot_cpu_has(X86_FEATURE_APIC))
1075 return -ENODEV;
1076
1077 /*
1078 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1079 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1080 */
1081
1082 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1083 acpi_parse_lapic_addr_ovr, 0);
1084 if (count < 0) {
1085 pr_err("Error parsing LAPIC address override entry\n");
1086 return count;
1087 }
1088
1089 register_lapic_address(acpi_lapic_addr);
1090
1091 return count;
1092}
1093
1094static int __init acpi_parse_madt_lapic_entries(void)
1095{
1096 int count;
1097 int x2count = 0;
1098 int ret;
1099 struct acpi_subtable_proc madt_proc[2];
1100
1101 if (!boot_cpu_has(X86_FEATURE_APIC))
1102 return -ENODEV;
1103
1104 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1105 acpi_parse_sapic, MAX_LOCAL_APIC);
1106
1107 if (!count) {
1108 memset(madt_proc, 0, sizeof(madt_proc));
1109 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1110 madt_proc[0].handler = acpi_parse_lapic;
1111 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1112 madt_proc[1].handler = acpi_parse_x2apic;
1113 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1114 sizeof(struct acpi_table_madt),
1115 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1116 if (ret < 0) {
1117 pr_err("Error parsing LAPIC/X2APIC entries\n");
1118 return ret;
1119 }
1120
1121 count = madt_proc[0].count;
1122 x2count = madt_proc[1].count;
1123 }
1124 if (!count && !x2count) {
1125 pr_err("No LAPIC entries present\n");
1126 /* TBD: Cleanup to allow fallback to MPS */
1127 return -ENODEV;
1128 } else if (count < 0 || x2count < 0) {
1129 pr_err("Error parsing LAPIC entry\n");
1130 /* TBD: Cleanup to allow fallback to MPS */
1131 return count;
1132 }
1133
1134 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1135 acpi_parse_x2apic_nmi, 0);
1136 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1137 acpi_parse_lapic_nmi, 0);
1138 if (count < 0 || x2count < 0) {
1139 pr_err("Error parsing LAPIC NMI entry\n");
1140 /* TBD: Cleanup to allow fallback to MPS */
1141 return count;
1142 }
1143 return 0;
1144}
1145
1146#ifdef CONFIG_X86_64
1147static int __init acpi_parse_mp_wake(union acpi_subtable_headers *header,
1148 const unsigned long end)
1149{
1150 struct acpi_madt_multiproc_wakeup *mp_wake;
1151
1152 if (!IS_ENABLED(CONFIG_SMP))
1153 return -ENODEV;
1154
1155 mp_wake = (struct acpi_madt_multiproc_wakeup *)header;
1156 if (BAD_MADT_ENTRY(mp_wake, end))
1157 return -EINVAL;
1158
1159 acpi_table_print_madt_entry(&header->common);
1160
1161 acpi_mp_wake_mailbox_paddr = mp_wake->base_address;
1162
1163 acpi_wake_cpu_handler_update(acpi_wakeup_cpu);
1164
1165 return 0;
1166}
1167#endif /* CONFIG_X86_64 */
1168#endif /* CONFIG_X86_LOCAL_APIC */
1169
1170#ifdef CONFIG_X86_IO_APIC
1171static void __init mp_config_acpi_legacy_irqs(void)
1172{
1173 int i;
1174 struct mpc_intsrc mp_irq;
1175
1176#ifdef CONFIG_EISA
1177 /*
1178 * Fabricate the legacy ISA bus (bus #31).
1179 */
1180 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1181#endif
1182 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1183 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1184
1185 /*
1186 * Use the default configuration for the IRQs 0-15. Unless
1187 * overridden by (MADT) interrupt source override entries.
1188 */
1189 for (i = 0; i < nr_legacy_irqs(); i++) {
1190 int ioapic, pin;
1191 unsigned int dstapic;
1192 int idx;
1193 u32 gsi;
1194
1195 /* Locate the gsi that irq i maps to. */
1196 if (acpi_isa_irq_to_gsi(i, &gsi))
1197 continue;
1198
1199 /*
1200 * Locate the IOAPIC that manages the ISA IRQ.
1201 */
1202 ioapic = mp_find_ioapic(gsi);
1203 if (ioapic < 0)
1204 continue;
1205 pin = mp_find_ioapic_pin(ioapic, gsi);
1206 dstapic = mpc_ioapic_id(ioapic);
1207
1208 for (idx = 0; idx < mp_irq_entries; idx++) {
1209 struct mpc_intsrc *irq = mp_irqs + idx;
1210
1211 /* Do we already have a mapping for this ISA IRQ? */
1212 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1213 break;
1214
1215 /* Do we already have a mapping for this IOAPIC pin */
1216 if (irq->dstapic == dstapic && irq->dstirq == pin)
1217 break;
1218 }
1219
1220 if (idx != mp_irq_entries) {
1221 pr_debug("ACPI: IRQ%d used by override.\n", i);
1222 continue; /* IRQ already used */
1223 }
1224
1225 mp_irq.type = MP_INTSRC;
1226 mp_irq.irqflag = 0; /* Conforming */
1227 mp_irq.srcbus = MP_ISA_BUS;
1228 mp_irq.dstapic = dstapic;
1229 mp_irq.irqtype = mp_INT;
1230 mp_irq.srcbusirq = i; /* Identity mapped */
1231 mp_irq.dstirq = pin;
1232
1233 mp_save_irq(&mp_irq);
1234 }
1235}
1236
1237/*
1238 * Parse IOAPIC related entries in MADT
1239 * returns 0 on success, < 0 on error
1240 */
1241static int __init acpi_parse_madt_ioapic_entries(void)
1242{
1243 int count;
1244
1245 /*
1246 * ACPI interpreter is required to complete interrupt setup,
1247 * so if it is off, don't enumerate the io-apics with ACPI.
1248 * If MPS is present, it will handle them,
1249 * otherwise the system will stay in PIC mode
1250 */
1251 if (acpi_disabled || acpi_noirq)
1252 return -ENODEV;
1253
1254 if (!boot_cpu_has(X86_FEATURE_APIC))
1255 return -ENODEV;
1256
1257 /*
1258 * if "noapic" boot option, don't look for IO-APICs
1259 */
1260 if (skip_ioapic_setup) {
1261 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n");
1262 return -ENODEV;
1263 }
1264
1265 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1266 MAX_IO_APICS);
1267 if (!count) {
1268 pr_err("No IOAPIC entries present\n");
1269 return -ENODEV;
1270 } else if (count < 0) {
1271 pr_err("Error parsing IOAPIC entry\n");
1272 return count;
1273 }
1274
1275 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1276 acpi_parse_int_src_ovr, nr_irqs);
1277 if (count < 0) {
1278 pr_err("Error parsing interrupt source overrides entry\n");
1279 /* TBD: Cleanup to allow fallback to MPS */
1280 return count;
1281 }
1282
1283 /*
1284 * If BIOS did not supply an INT_SRC_OVR for the SCI
1285 * pretend we got one so we can set the SCI flags.
1286 * But ignore setting up SCI on hardware reduced platforms.
1287 */
1288 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1289 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1290 acpi_gbl_FADT.sci_interrupt);
1291
1292 /* Fill in identity legacy mappings where no override */
1293 mp_config_acpi_legacy_irqs();
1294
1295 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1296 acpi_parse_nmi_src, nr_irqs);
1297 if (count < 0) {
1298 pr_err("Error parsing NMI SRC entry\n");
1299 /* TBD: Cleanup to allow fallback to MPS */
1300 return count;
1301 }
1302
1303 return 0;
1304}
1305#else
1306static inline int acpi_parse_madt_ioapic_entries(void)
1307{
1308 return -1;
1309}
1310#endif /* !CONFIG_X86_IO_APIC */
1311
1312static void __init early_acpi_process_madt(void)
1313{
1314#ifdef CONFIG_X86_LOCAL_APIC
1315 int error;
1316
1317 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1318
1319 /*
1320 * Parse MADT LAPIC entries
1321 */
1322 error = early_acpi_parse_madt_lapic_addr_ovr();
1323 if (!error) {
1324 acpi_lapic = 1;
1325 smp_found_config = 1;
1326 }
1327 if (error == -EINVAL) {
1328 /*
1329 * Dell Precision Workstation 410, 610 come here.
1330 */
1331 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1332 disable_acpi();
1333 }
1334 }
1335#endif
1336}
1337
1338static void __init acpi_process_madt(void)
1339{
1340#ifdef CONFIG_X86_LOCAL_APIC
1341 int error;
1342
1343 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1344
1345 /*
1346 * Parse MADT LAPIC entries
1347 */
1348 error = acpi_parse_madt_lapic_entries();
1349 if (!error) {
1350 acpi_lapic = 1;
1351
1352 /*
1353 * Parse MADT IO-APIC entries
1354 */
1355 mutex_lock(&acpi_ioapic_lock);
1356 error = acpi_parse_madt_ioapic_entries();
1357 mutex_unlock(&acpi_ioapic_lock);
1358 if (!error) {
1359 acpi_set_irq_model_ioapic();
1360
1361 smp_found_config = 1;
1362 }
1363
1364#ifdef CONFIG_X86_64
1365 /*
1366 * Parse MADT MP Wake entry.
1367 */
1368 acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP,
1369 acpi_parse_mp_wake, 1);
1370#endif
1371 }
1372 if (error == -EINVAL) {
1373 /*
1374 * Dell Precision Workstation 410, 610 come here.
1375 */
1376 pr_err("Invalid BIOS MADT, disabling ACPI\n");
1377 disable_acpi();
1378 }
1379 } else {
1380 /*
1381 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1382 * In the event an MPS table was found, forget it.
1383 * Boot with "acpi=off" to use MPS on such a system.
1384 */
1385 if (smp_found_config) {
1386 pr_warn("No APIC-table, disabling MPS\n");
1387 smp_found_config = 0;
1388 }
1389 }
1390
1391 /*
1392 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1393 * processors, where MPS only supports physical.
1394 */
1395 if (acpi_lapic && acpi_ioapic)
1396 pr_info("Using ACPI (MADT) for SMP configuration information\n");
1397 else if (acpi_lapic)
1398 pr_info("Using ACPI for processor (LAPIC) configuration information\n");
1399#endif
1400 return;
1401}
1402
1403static int __init disable_acpi_irq(const struct dmi_system_id *d)
1404{
1405 if (!acpi_force) {
1406 pr_notice("%s detected: force use of acpi=noirq\n", d->ident);
1407 acpi_noirq_set();
1408 }
1409 return 0;
1410}
1411
1412static int __init disable_acpi_pci(const struct dmi_system_id *d)
1413{
1414 if (!acpi_force) {
1415 pr_notice("%s detected: force use of pci=noacpi\n", d->ident);
1416 acpi_disable_pci();
1417 }
1418 return 0;
1419}
1420
1421static int __init disable_acpi_xsdt(const struct dmi_system_id *d)
1422{
1423 if (!acpi_force) {
1424 pr_notice("%s detected: force use of acpi=rsdt\n", d->ident);
1425 acpi_gbl_do_not_use_xsdt = TRUE;
1426 } else {
1427 pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n");
1428 }
1429 return 0;
1430}
1431
1432static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1433{
1434 if (!acpi_force) {
1435 pr_notice("%s detected: acpi off\n", d->ident);
1436 disable_acpi();
1437 } else {
1438 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n");
1439 }
1440 return 0;
1441}
1442
1443/*
1444 * Force ignoring BIOS IRQ0 override
1445 */
1446static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1447{
1448 if (!acpi_skip_timer_override) {
1449 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1450 d->ident);
1451 acpi_skip_timer_override = 1;
1452 }
1453 return 0;
1454}
1455
1456/*
1457 * ACPI offers an alternative platform interface model that removes
1458 * ACPI hardware requirements for platforms that do not implement
1459 * the PC Architecture.
1460 *
1461 * We initialize the Hardware-reduced ACPI model here:
1462 */
1463void __init acpi_generic_reduced_hw_init(void)
1464{
1465 /*
1466 * Override x86_init functions and bypass legacy PIC in
1467 * hardware reduced ACPI mode.
1468 */
1469 x86_init.timers.timer_init = x86_init_noop;
1470 x86_init.irqs.pre_vector_init = x86_init_noop;
1471 legacy_pic = &null_legacy_pic;
1472}
1473
1474static void __init acpi_reduced_hw_init(void)
1475{
1476 if (acpi_gbl_reduced_hardware)
1477 x86_init.acpi.reduced_hw_early_init();
1478}
1479
1480/*
1481 * If your system is blacklisted here, but you find that acpi=force
1482 * works for you, please contact linux-acpi@vger.kernel.org
1483 */
1484static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1485 /*
1486 * Boxes that need ACPI disabled
1487 */
1488 {
1489 .callback = dmi_disable_acpi,
1490 .ident = "IBM Thinkpad",
1491 .matches = {
1492 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1493 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1494 },
1495 },
1496
1497 /*
1498 * Boxes that need ACPI PCI IRQ routing disabled
1499 */
1500 {
1501 .callback = disable_acpi_irq,
1502 .ident = "ASUS A7V",
1503 .matches = {
1504 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1505 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1506 /* newer BIOS, Revision 1011, does work */
1507 DMI_MATCH(DMI_BIOS_VERSION,
1508 "ASUS A7V ACPI BIOS Revision 1007"),
1509 },
1510 },
1511 {
1512 /*
1513 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1514 * for LPC bridge, which is needed for the PCI
1515 * interrupt links to work. DSDT fix is in bug 5966.
1516 * 2645, 2646 model numbers are shared with 600/600E/600X
1517 */
1518 .callback = disable_acpi_irq,
1519 .ident = "IBM Thinkpad 600 Series 2645",
1520 .matches = {
1521 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1522 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1523 },
1524 },
1525 {
1526 .callback = disable_acpi_irq,
1527 .ident = "IBM Thinkpad 600 Series 2646",
1528 .matches = {
1529 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1530 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1531 },
1532 },
1533 /*
1534 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1535 */
1536 { /* _BBN 0 bug */
1537 .callback = disable_acpi_pci,
1538 .ident = "ASUS PR-DLS",
1539 .matches = {
1540 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1541 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1542 DMI_MATCH(DMI_BIOS_VERSION,
1543 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1544 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1545 },
1546 },
1547 {
1548 .callback = disable_acpi_pci,
1549 .ident = "Acer TravelMate 36x Laptop",
1550 .matches = {
1551 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1552 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1553 },
1554 },
1555 /*
1556 * Boxes that need ACPI XSDT use disabled due to corrupted tables
1557 */
1558 {
1559 .callback = disable_acpi_xsdt,
1560 .ident = "Advantech DAC-BJ01",
1561 .matches = {
1562 DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
1563 DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"),
1564 DMI_MATCH(DMI_BIOS_VERSION, "V1.12"),
1565 DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"),
1566 },
1567 },
1568 {}
1569};
1570
1571/* second table for DMI checks that should run after early-quirks */
1572static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1573 /*
1574 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1575 * which includes some code which overrides all temperature
1576 * trip points to 16C if the INTIN2 input of the I/O APIC
1577 * is enabled. This input is incorrectly designated the
1578 * ISA IRQ 0 via an interrupt source override even though
1579 * it is wired to the output of the master 8259A and INTIN0
1580 * is not connected at all. Force ignoring BIOS IRQ0
1581 * override in that cases.
1582 */
1583 {
1584 .callback = dmi_ignore_irq0_timer_override,
1585 .ident = "HP nx6115 laptop",
1586 .matches = {
1587 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1588 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1589 },
1590 },
1591 {
1592 .callback = dmi_ignore_irq0_timer_override,
1593 .ident = "HP NX6125 laptop",
1594 .matches = {
1595 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1596 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1597 },
1598 },
1599 {
1600 .callback = dmi_ignore_irq0_timer_override,
1601 .ident = "HP NX6325 laptop",
1602 .matches = {
1603 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1604 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1605 },
1606 },
1607 {
1608 .callback = dmi_ignore_irq0_timer_override,
1609 .ident = "HP 6715b laptop",
1610 .matches = {
1611 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1612 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1613 },
1614 },
1615 {
1616 .callback = dmi_ignore_irq0_timer_override,
1617 .ident = "FUJITSU SIEMENS",
1618 .matches = {
1619 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1620 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1621 },
1622 },
1623 {}
1624};
1625
1626/*
1627 * acpi_boot_table_init() and acpi_boot_init()
1628 * called from setup_arch(), always.
1629 * 1. checksums all tables
1630 * 2. enumerates lapics
1631 * 3. enumerates io-apics
1632 *
1633 * acpi_table_init() is separate to allow reading SRAT without
1634 * other side effects.
1635 *
1636 * side effects of acpi_boot_init:
1637 * acpi_lapic = 1 if LAPIC found
1638 * acpi_ioapic = 1 if IOAPIC found
1639 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1640 * if acpi_blacklisted() acpi_disabled = 1;
1641 * acpi_irq_model=...
1642 * ...
1643 */
1644
1645void __init acpi_boot_table_init(void)
1646{
1647 dmi_check_system(acpi_dmi_table);
1648
1649 /*
1650 * If acpi_disabled, bail out
1651 */
1652 if (acpi_disabled)
1653 return;
1654
1655 /*
1656 * Initialize the ACPI boot-time table parser.
1657 */
1658 if (acpi_locate_initial_tables())
1659 disable_acpi();
1660 else
1661 acpi_reserve_initial_tables();
1662}
1663
1664int __init early_acpi_boot_init(void)
1665{
1666 if (acpi_disabled)
1667 return 1;
1668
1669 acpi_table_init_complete();
1670
1671 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1672
1673 /*
1674 * blacklist may disable ACPI entirely
1675 */
1676 if (acpi_blacklisted()) {
1677 if (acpi_force) {
1678 pr_warn("acpi=force override\n");
1679 } else {
1680 pr_warn("Disabling ACPI support\n");
1681 disable_acpi();
1682 return 1;
1683 }
1684 }
1685
1686 /*
1687 * Process the Multiple APIC Description Table (MADT), if present
1688 */
1689 early_acpi_process_madt();
1690
1691 /*
1692 * Hardware-reduced ACPI mode initialization:
1693 */
1694 acpi_reduced_hw_init();
1695
1696 return 0;
1697}
1698
1699int __init acpi_boot_init(void)
1700{
1701 /* those are executed after early-quirks are executed */
1702 dmi_check_system(acpi_dmi_table_late);
1703
1704 /*
1705 * If acpi_disabled, bail out
1706 */
1707 if (acpi_disabled)
1708 return 1;
1709
1710 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1711
1712 /*
1713 * set sci_int and PM timer address
1714 */
1715 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1716
1717 /*
1718 * Process the Multiple APIC Description Table (MADT), if present
1719 */
1720 acpi_process_madt();
1721
1722 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1723 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt)
1724 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1725
1726 if (!acpi_noirq)
1727 x86_init.pci.init = pci_acpi_init;
1728
1729 /* Do not enable ACPI SPCR console by default */
1730 acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1731 return 0;
1732}
1733
1734static int __init parse_acpi(char *arg)
1735{
1736 if (!arg)
1737 return -EINVAL;
1738
1739 /* "acpi=off" disables both ACPI table parsing and interpreter */
1740 if (strcmp(arg, "off") == 0) {
1741 disable_acpi();
1742 }
1743 /* acpi=force to over-ride black-list */
1744 else if (strcmp(arg, "force") == 0) {
1745 acpi_force = 1;
1746 acpi_disabled = 0;
1747 }
1748 /* acpi=strict disables out-of-spec workarounds */
1749 else if (strcmp(arg, "strict") == 0) {
1750 acpi_strict = 1;
1751 }
1752 /* acpi=rsdt use RSDT instead of XSDT */
1753 else if (strcmp(arg, "rsdt") == 0) {
1754 acpi_gbl_do_not_use_xsdt = TRUE;
1755 }
1756 /* "acpi=noirq" disables ACPI interrupt routing */
1757 else if (strcmp(arg, "noirq") == 0) {
1758 acpi_noirq_set();
1759 }
1760 /* "acpi=copy_dsdt" copies DSDT */
1761 else if (strcmp(arg, "copy_dsdt") == 0) {
1762 acpi_gbl_copy_dsdt_locally = 1;
1763 }
1764 /* "acpi=nocmcff" disables FF mode for corrected errors */
1765 else if (strcmp(arg, "nocmcff") == 0) {
1766 acpi_disable_cmcff = 1;
1767 } else {
1768 /* Core will printk when we return error. */
1769 return -EINVAL;
1770 }
1771 return 0;
1772}
1773early_param("acpi", parse_acpi);
1774
1775static int __init parse_acpi_bgrt(char *arg)
1776{
1777 acpi_nobgrt = true;
1778 return 0;
1779}
1780early_param("bgrt_disable", parse_acpi_bgrt);
1781
1782/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1783static int __init parse_pci(char *arg)
1784{
1785 if (arg && strcmp(arg, "noacpi") == 0)
1786 acpi_disable_pci();
1787 return 0;
1788}
1789early_param("pci", parse_pci);
1790
1791int __init acpi_mps_check(void)
1792{
1793#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1794/* mptable code is not built-in*/
1795 if (acpi_disabled || acpi_noirq) {
1796 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n");
1797 return 1;
1798 }
1799#endif
1800 return 0;
1801}
1802
1803#ifdef CONFIG_X86_IO_APIC
1804static int __init parse_acpi_skip_timer_override(char *arg)
1805{
1806 acpi_skip_timer_override = 1;
1807 return 0;
1808}
1809early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1810
1811static int __init parse_acpi_use_timer_override(char *arg)
1812{
1813 acpi_use_timer_override = 1;
1814 return 0;
1815}
1816early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1817#endif /* CONFIG_X86_IO_APIC */
1818
1819static int __init setup_acpi_sci(char *s)
1820{
1821 if (!s)
1822 return -EINVAL;
1823 if (!strcmp(s, "edge"))
1824 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1825 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1826 else if (!strcmp(s, "level"))
1827 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1828 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1829 else if (!strcmp(s, "high"))
1830 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1831 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1832 else if (!strcmp(s, "low"))
1833 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1834 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1835 else
1836 return -EINVAL;
1837 return 0;
1838}
1839early_param("acpi_sci", setup_acpi_sci);
1840
1841int __acpi_acquire_global_lock(unsigned int *lock)
1842{
1843 unsigned int old, new, val;
1844 do {
1845 old = *lock;
1846 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1847 val = cmpxchg(lock, old, new);
1848 } while (unlikely (val != old));
1849 return ((new & 0x3) < 3) ? -1 : 0;
1850}
1851
1852int __acpi_release_global_lock(unsigned int *lock)
1853{
1854 unsigned int old, new, val;
1855 do {
1856 old = *lock;
1857 new = old & ~0x3;
1858 val = cmpxchg(lock, old, new);
1859 } while (unlikely (val != old));
1860 return old & 0x1;
1861}
1862
1863void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1864{
1865 e820__range_add(addr, size, E820_TYPE_NVS);
1866 e820__update_table_print();
1867}
1868
1869void x86_default_set_root_pointer(u64 addr)
1870{
1871 boot_params.acpi_rsdp_addr = addr;
1872}
1873
1874u64 x86_default_get_root_pointer(void)
1875{
1876 return boot_params.acpi_rsdp_addr;
1877}