1 /*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/export.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38 #include <linux/efi-bgrt.h>
39
40 #include <asm/e820/api.h>
41 #include <asm/irqdomain.h>
42 #include <asm/pci_x86.h>
43 #include <asm/pgtable.h>
44 #include <asm/io_apic.h>
45 #include <asm/apic.h>
46 #include <asm/io.h>
47 #include <asm/mpspec.h>
48 #include <asm/smp.h>
49 #include <asm/i8259.h>
50
51 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
52 static int __initdata acpi_force = 0;
53 int acpi_disabled;
54 EXPORT_SYMBOL(acpi_disabled);
55
56 #ifdef CONFIG_X86_64
57 # include <asm/proto.h>
58 #endif /* X86 */
59
60 #define PREFIX "ACPI: "
61
62 int acpi_noirq; /* skip ACPI IRQ initialization */
63 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
64 EXPORT_SYMBOL(acpi_pci_disabled);
65
66 int acpi_lapic;
67 int acpi_ioapic;
68 int acpi_strict;
69 int acpi_disable_cmcff;
70
71 u8 acpi_sci_flags __initdata;
72 int acpi_sci_override_gsi __initdata;
73 int acpi_skip_timer_override __initdata;
74 int acpi_use_timer_override __initdata;
75 int acpi_fix_pin2_polarity __initdata;
76
77 #ifdef CONFIG_X86_LOCAL_APIC
78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
79 #endif
80
81 #ifdef CONFIG_X86_IO_APIC
82 /*
83 * Locks related to IOAPIC hotplug
84 * Hotplug side:
85 * ->device_hotplug_lock
86 * ->acpi_ioapic_lock
87 * ->ioapic_lock
88 * Interrupt mapping side:
89 * ->acpi_ioapic_lock
90 * ->ioapic_mutex
91 * ->ioapic_lock
92 */
93 static DEFINE_MUTEX(acpi_ioapic_lock);
94 #endif
95
96 /* --------------------------------------------------------------------------
97 Boot-time Configuration
98 -------------------------------------------------------------------------- */
99
100 /*
101 * The default interrupt routing model is PIC (8259). This gets
102 * overridden if IOAPICs are enumerated (below).
103 */
104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
105
106
107 /*
108 * ISA irqs by default are the first 16 gsis but can be
109 * any gsi as specified by an interrupt source override.
110 */
111 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
112 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
113 };
114
115 #define ACPI_INVALID_GSI INT_MIN
116
117 /*
118 * This is just a simple wrapper around early_memremap(),
119 * with sanity checks for phys == 0 and size == 0.
120 */
__acpi_map_table(unsigned long phys,unsigned long size)121 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
122 {
123
124 if (!phys || !size)
125 return NULL;
126
127 return early_memremap(phys, size);
128 }
129
__acpi_unmap_table(void __iomem * map,unsigned long size)130 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
131 {
132 if (!map || !size)
133 return;
134
135 early_memunmap(map, size);
136 }
137
138 #ifdef CONFIG_X86_LOCAL_APIC
acpi_parse_madt(struct acpi_table_header * table)139 static int __init acpi_parse_madt(struct acpi_table_header *table)
140 {
141 struct acpi_table_madt *madt = NULL;
142
143 if (!boot_cpu_has(X86_FEATURE_APIC))
144 return -EINVAL;
145
146 madt = (struct acpi_table_madt *)table;
147 if (!madt) {
148 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
149 return -ENODEV;
150 }
151
152 if (madt->address) {
153 acpi_lapic_addr = (u64) madt->address;
154
155 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
156 madt->address);
157 }
158
159 default_acpi_madt_oem_check(madt->header.oem_id,
160 madt->header.oem_table_id);
161
162 return 0;
163 }
164
165 /**
166 * acpi_register_lapic - register a local apic and generates a logic cpu number
167 * @id: local apic id to register
168 * @acpiid: ACPI id to register
169 * @enabled: this cpu is enabled or not
170 *
171 * Returns the logic cpu number which maps to the local apic
172 */
acpi_register_lapic(int id,u32 acpiid,u8 enabled)173 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
174 {
175 unsigned int ver = 0;
176 int cpu;
177
178 if (id >= MAX_LOCAL_APIC) {
179 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
180 return -EINVAL;
181 }
182
183 if (!enabled) {
184 ++disabled_cpus;
185 return -EINVAL;
186 }
187
188 if (boot_cpu_physical_apicid != -1U)
189 ver = boot_cpu_apic_version;
190
191 cpu = generic_processor_info(id, ver);
192 if (cpu >= 0)
193 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
194
195 return cpu;
196 }
197
198 static int __init
acpi_parse_x2apic(struct acpi_subtable_header * header,const unsigned long end)199 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
200 {
201 struct acpi_madt_local_x2apic *processor = NULL;
202 #ifdef CONFIG_X86_X2APIC
203 int apic_id;
204 u8 enabled;
205 #endif
206
207 processor = (struct acpi_madt_local_x2apic *)header;
208
209 if (BAD_MADT_ENTRY(processor, end))
210 return -EINVAL;
211
212 acpi_table_print_madt_entry(header);
213
214 #ifdef CONFIG_X86_X2APIC
215 apic_id = processor->local_apic_id;
216 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
217
218 /* Ignore invalid ID */
219 if (apic_id == 0xffffffff)
220 return 0;
221
222 /*
223 * We need to register disabled CPU as well to permit
224 * counting disabled CPUs. This allows us to size
225 * cpus_possible_map more accurately, to permit
226 * to not preallocating memory for all NR_CPUS
227 * when we use CPU hotplug.
228 */
229 if (!apic->apic_id_valid(apic_id) && enabled)
230 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
231 else
232 acpi_register_lapic(apic_id, processor->uid, enabled);
233 #else
234 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
235 #endif
236
237 return 0;
238 }
239
240 static int __init
acpi_parse_lapic(struct acpi_subtable_header * header,const unsigned long end)241 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
242 {
243 struct acpi_madt_local_apic *processor = NULL;
244
245 processor = (struct acpi_madt_local_apic *)header;
246
247 if (BAD_MADT_ENTRY(processor, end))
248 return -EINVAL;
249
250 acpi_table_print_madt_entry(header);
251
252 /* Ignore invalid ID */
253 if (processor->id == 0xff)
254 return 0;
255
256 /*
257 * We need to register disabled CPU as well to permit
258 * counting disabled CPUs. This allows us to size
259 * cpus_possible_map more accurately, to permit
260 * to not preallocating memory for all NR_CPUS
261 * when we use CPU hotplug.
262 */
263 acpi_register_lapic(processor->id, /* APIC ID */
264 processor->processor_id, /* ACPI ID */
265 processor->lapic_flags & ACPI_MADT_ENABLED);
266
267 return 0;
268 }
269
270 static int __init
acpi_parse_sapic(struct acpi_subtable_header * header,const unsigned long end)271 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
272 {
273 struct acpi_madt_local_sapic *processor = NULL;
274
275 processor = (struct acpi_madt_local_sapic *)header;
276
277 if (BAD_MADT_ENTRY(processor, end))
278 return -EINVAL;
279
280 acpi_table_print_madt_entry(header);
281
282 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
283 processor->processor_id, /* ACPI ID */
284 processor->lapic_flags & ACPI_MADT_ENABLED);
285
286 return 0;
287 }
288
289 static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,const unsigned long end)290 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
291 const unsigned long end)
292 {
293 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
294
295 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
296
297 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
298 return -EINVAL;
299
300 acpi_table_print_madt_entry(header);
301
302 acpi_lapic_addr = lapic_addr_ovr->address;
303
304 return 0;
305 }
306
307 static int __init
acpi_parse_x2apic_nmi(struct acpi_subtable_header * header,const unsigned long end)308 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
309 const unsigned long end)
310 {
311 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
312
313 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
314
315 if (BAD_MADT_ENTRY(x2apic_nmi, end))
316 return -EINVAL;
317
318 acpi_table_print_madt_entry(header);
319
320 if (x2apic_nmi->lint != 1)
321 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
322
323 return 0;
324 }
325
326 static int __init
acpi_parse_lapic_nmi(struct acpi_subtable_header * header,const unsigned long end)327 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
328 {
329 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
330
331 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
332
333 if (BAD_MADT_ENTRY(lapic_nmi, end))
334 return -EINVAL;
335
336 acpi_table_print_madt_entry(header);
337
338 if (lapic_nmi->lint != 1)
339 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
340
341 return 0;
342 }
343
344 #endif /*CONFIG_X86_LOCAL_APIC */
345
346 #ifdef CONFIG_X86_IO_APIC
347 #define MP_ISA_BUS 0
348
349 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
350 u8 trigger, u32 gsi);
351
mp_override_legacy_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)352 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
353 u32 gsi)
354 {
355 /*
356 * Check bus_irq boundary.
357 */
358 if (bus_irq >= NR_IRQS_LEGACY) {
359 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
360 return;
361 }
362
363 /*
364 * TBD: This check is for faulty timer entries, where the override
365 * erroneously sets the trigger to level, resulting in a HUGE
366 * increase of timer interrupts!
367 */
368 if ((bus_irq == 0) && (trigger == 3))
369 trigger = 1;
370
371 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
372 return;
373 /*
374 * Reset default identity mapping if gsi is also an legacy IRQ,
375 * otherwise there will be more than one entry with the same GSI
376 * and acpi_isa_irq_to_gsi() may give wrong result.
377 */
378 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
379 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
380 isa_irq_to_gsi[bus_irq] = gsi;
381 }
382
mp_config_acpi_gsi(struct device * dev,u32 gsi,int trigger,int polarity)383 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
384 int polarity)
385 {
386 #ifdef CONFIG_X86_MPPARSE
387 struct mpc_intsrc mp_irq;
388 struct pci_dev *pdev;
389 unsigned char number;
390 unsigned int devfn;
391 int ioapic;
392 u8 pin;
393
394 if (!acpi_ioapic)
395 return 0;
396 if (!dev || !dev_is_pci(dev))
397 return 0;
398
399 pdev = to_pci_dev(dev);
400 number = pdev->bus->number;
401 devfn = pdev->devfn;
402 pin = pdev->pin;
403 /* print the entry should happen on mptable identically */
404 mp_irq.type = MP_INTSRC;
405 mp_irq.irqtype = mp_INT;
406 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
407 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
408 mp_irq.srcbus = number;
409 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
410 ioapic = mp_find_ioapic(gsi);
411 mp_irq.dstapic = mpc_ioapic_id(ioapic);
412 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
413
414 mp_save_irq(&mp_irq);
415 #endif
416 return 0;
417 }
418
mp_register_ioapic_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)419 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
420 u8 trigger, u32 gsi)
421 {
422 struct mpc_intsrc mp_irq;
423 int ioapic, pin;
424
425 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
426 ioapic = mp_find_ioapic(gsi);
427 if (ioapic < 0) {
428 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
429 return ioapic;
430 }
431
432 pin = mp_find_ioapic_pin(ioapic, gsi);
433
434 mp_irq.type = MP_INTSRC;
435 mp_irq.irqtype = mp_INT;
436 mp_irq.irqflag = (trigger << 2) | polarity;
437 mp_irq.srcbus = MP_ISA_BUS;
438 mp_irq.srcbusirq = bus_irq;
439 mp_irq.dstapic = mpc_ioapic_id(ioapic);
440 mp_irq.dstirq = pin;
441
442 mp_save_irq(&mp_irq);
443
444 return 0;
445 }
446
447 static int __init
acpi_parse_ioapic(struct acpi_subtable_header * header,const unsigned long end)448 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
449 {
450 struct acpi_madt_io_apic *ioapic = NULL;
451 struct ioapic_domain_cfg cfg = {
452 .type = IOAPIC_DOMAIN_DYNAMIC,
453 .ops = &mp_ioapic_irqdomain_ops,
454 };
455
456 ioapic = (struct acpi_madt_io_apic *)header;
457
458 if (BAD_MADT_ENTRY(ioapic, end))
459 return -EINVAL;
460
461 acpi_table_print_madt_entry(header);
462
463 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
464 if (ioapic->global_irq_base < nr_legacy_irqs())
465 cfg.type = IOAPIC_DOMAIN_LEGACY;
466
467 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
468 &cfg);
469
470 return 0;
471 }
472
473 /*
474 * Parse Interrupt Source Override for the ACPI SCI
475 */
acpi_sci_ioapic_setup(u8 bus_irq,u16 polarity,u16 trigger,u32 gsi)476 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
477 {
478 if (trigger == 0) /* compatible SCI trigger is level */
479 trigger = 3;
480
481 if (polarity == 0) /* compatible SCI polarity is low */
482 polarity = 3;
483
484 /* Command-line over-ride via acpi_sci= */
485 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
486 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
487
488 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
489 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
490
491 if (bus_irq < NR_IRQS_LEGACY)
492 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
493 else
494 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
495
496 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
497
498 /*
499 * stash over-ride to indicate we've been here
500 * and for later update of acpi_gbl_FADT
501 */
502 acpi_sci_override_gsi = gsi;
503 return;
504 }
505
506 static int __init
acpi_parse_int_src_ovr(struct acpi_subtable_header * header,const unsigned long end)507 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
508 const unsigned long end)
509 {
510 struct acpi_madt_interrupt_override *intsrc = NULL;
511
512 intsrc = (struct acpi_madt_interrupt_override *)header;
513
514 if (BAD_MADT_ENTRY(intsrc, end))
515 return -EINVAL;
516
517 acpi_table_print_madt_entry(header);
518
519 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
520 acpi_sci_ioapic_setup(intsrc->source_irq,
521 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
522 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
523 intsrc->global_irq);
524 return 0;
525 }
526
527 if (intsrc->source_irq == 0) {
528 if (acpi_skip_timer_override) {
529 printk(PREFIX "BIOS IRQ0 override ignored.\n");
530 return 0;
531 }
532
533 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
534 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
535 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
536 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
537 }
538 }
539
540 mp_override_legacy_irq(intsrc->source_irq,
541 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
542 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
543 intsrc->global_irq);
544
545 return 0;
546 }
547
548 static int __init
acpi_parse_nmi_src(struct acpi_subtable_header * header,const unsigned long end)549 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
550 {
551 struct acpi_madt_nmi_source *nmi_src = NULL;
552
553 nmi_src = (struct acpi_madt_nmi_source *)header;
554
555 if (BAD_MADT_ENTRY(nmi_src, end))
556 return -EINVAL;
557
558 acpi_table_print_madt_entry(header);
559
560 /* TBD: Support nimsrc entries? */
561
562 return 0;
563 }
564
565 #endif /* CONFIG_X86_IO_APIC */
566
567 /*
568 * acpi_pic_sci_set_trigger()
569 *
570 * use ELCR to set PIC-mode trigger type for SCI
571 *
572 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
573 * it may require Edge Trigger -- use "acpi_sci=edge"
574 *
575 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
576 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
577 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
578 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
579 */
580
acpi_pic_sci_set_trigger(unsigned int irq,u16 trigger)581 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
582 {
583 unsigned int mask = 1 << irq;
584 unsigned int old, new;
585
586 /* Real old ELCR mask */
587 old = inb(0x4d0) | (inb(0x4d1) << 8);
588
589 /*
590 * If we use ACPI to set PCI IRQs, then we should clear ELCR
591 * since we will set it correctly as we enable the PCI irq
592 * routing.
593 */
594 new = acpi_noirq ? old : 0;
595
596 /*
597 * Update SCI information in the ELCR, it isn't in the PCI
598 * routing tables..
599 */
600 switch (trigger) {
601 case 1: /* Edge - clear */
602 new &= ~mask;
603 break;
604 case 3: /* Level - set */
605 new |= mask;
606 break;
607 }
608
609 if (old == new)
610 return;
611
612 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
613 outb(new, 0x4d0);
614 outb(new >> 8, 0x4d1);
615 }
616
acpi_gsi_to_irq(u32 gsi,unsigned int * irqp)617 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
618 {
619 int rc, irq, trigger, polarity;
620
621 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
622 *irqp = gsi;
623 return 0;
624 }
625
626 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
627 if (rc == 0) {
628 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
629 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
630 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
631 if (irq >= 0) {
632 *irqp = irq;
633 return 0;
634 }
635 }
636
637 return -1;
638 }
639 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
640
acpi_isa_irq_to_gsi(unsigned isa_irq,u32 * gsi)641 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
642 {
643 if (isa_irq < nr_legacy_irqs() &&
644 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
645 *gsi = isa_irq_to_gsi[isa_irq];
646 return 0;
647 }
648
649 return -1;
650 }
651
acpi_register_gsi_pic(struct device * dev,u32 gsi,int trigger,int polarity)652 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
653 int trigger, int polarity)
654 {
655 #ifdef CONFIG_PCI
656 /*
657 * Make sure all (legacy) PCI IRQs are set as level-triggered.
658 */
659 if (trigger == ACPI_LEVEL_SENSITIVE)
660 elcr_set_level_irq(gsi);
661 #endif
662
663 return gsi;
664 }
665
666 #ifdef CONFIG_X86_LOCAL_APIC
acpi_register_gsi_ioapic(struct device * dev,u32 gsi,int trigger,int polarity)667 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
668 int trigger, int polarity)
669 {
670 int irq = gsi;
671 #ifdef CONFIG_X86_IO_APIC
672 int node;
673 struct irq_alloc_info info;
674
675 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
676 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
677 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
678 ioapic_set_alloc_attr(&info, node, trigger, polarity);
679
680 mutex_lock(&acpi_ioapic_lock);
681 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
682 /* Don't set up the ACPI SCI because it's already set up */
683 if (irq >= 0 && enable_update_mptable &&
684 acpi_gbl_FADT.sci_interrupt != gsi)
685 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
686 mutex_unlock(&acpi_ioapic_lock);
687 #endif
688
689 return irq;
690 }
691
acpi_unregister_gsi_ioapic(u32 gsi)692 static void acpi_unregister_gsi_ioapic(u32 gsi)
693 {
694 #ifdef CONFIG_X86_IO_APIC
695 int irq;
696
697 mutex_lock(&acpi_ioapic_lock);
698 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
699 if (irq > 0)
700 mp_unmap_irq(irq);
701 mutex_unlock(&acpi_ioapic_lock);
702 #endif
703 }
704 #endif
705
706 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
707 int trigger, int polarity) = acpi_register_gsi_pic;
708 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
709
710 #ifdef CONFIG_ACPI_SLEEP
711 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
712 #else
713 int (*acpi_suspend_lowlevel)(void);
714 #endif
715
716 /*
717 * success: return IRQ number (>=0)
718 * failure: return < 0
719 */
acpi_register_gsi(struct device * dev,u32 gsi,int trigger,int polarity)720 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
721 {
722 return __acpi_register_gsi(dev, gsi, trigger, polarity);
723 }
724 EXPORT_SYMBOL_GPL(acpi_register_gsi);
725
acpi_unregister_gsi(u32 gsi)726 void acpi_unregister_gsi(u32 gsi)
727 {
728 if (__acpi_unregister_gsi)
729 __acpi_unregister_gsi(gsi);
730 }
731 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
732
733 #ifdef CONFIG_X86_LOCAL_APIC
acpi_set_irq_model_ioapic(void)734 static void __init acpi_set_irq_model_ioapic(void)
735 {
736 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
737 __acpi_register_gsi = acpi_register_gsi_ioapic;
738 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
739 acpi_ioapic = 1;
740 }
741 #endif
742
743 /*
744 * ACPI based hotplug support for CPU
745 */
746 #ifdef CONFIG_ACPI_HOTPLUG_CPU
747 #include <acpi/processor.h>
748
acpi_map_cpu2node(acpi_handle handle,int cpu,int physid)749 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
750 {
751 #ifdef CONFIG_ACPI_NUMA
752 int nid;
753
754 nid = acpi_get_node(handle);
755 if (nid != NUMA_NO_NODE) {
756 set_apicid_to_node(physid, nid);
757 numa_set_node(cpu, nid);
758 }
759 #endif
760 return 0;
761 }
762
acpi_map_cpu(acpi_handle handle,phys_cpuid_t physid,u32 acpi_id,int * pcpu)763 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
764 int *pcpu)
765 {
766 int cpu;
767
768 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
769 if (cpu < 0) {
770 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
771 return cpu;
772 }
773
774 acpi_processor_set_pdc(handle);
775 acpi_map_cpu2node(handle, cpu, physid);
776
777 *pcpu = cpu;
778 return 0;
779 }
780 EXPORT_SYMBOL(acpi_map_cpu);
781
acpi_unmap_cpu(int cpu)782 int acpi_unmap_cpu(int cpu)
783 {
784 #ifdef CONFIG_ACPI_NUMA
785 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
786 #endif
787
788 per_cpu(x86_cpu_to_apicid, cpu) = -1;
789 set_cpu_present(cpu, false);
790 num_processors--;
791
792 return (0);
793 }
794 EXPORT_SYMBOL(acpi_unmap_cpu);
795 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
796
acpi_register_ioapic(acpi_handle handle,u64 phys_addr,u32 gsi_base)797 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
798 {
799 int ret = -ENOSYS;
800 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
801 int ioapic_id;
802 u64 addr;
803 struct ioapic_domain_cfg cfg = {
804 .type = IOAPIC_DOMAIN_DYNAMIC,
805 .ops = &mp_ioapic_irqdomain_ops,
806 };
807
808 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
809 if (ioapic_id < 0) {
810 unsigned long long uid;
811 acpi_status status;
812
813 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
814 NULL, &uid);
815 if (ACPI_FAILURE(status)) {
816 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
817 return -EINVAL;
818 }
819 ioapic_id = (int)uid;
820 }
821
822 mutex_lock(&acpi_ioapic_lock);
823 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
824 mutex_unlock(&acpi_ioapic_lock);
825 #endif
826
827 return ret;
828 }
829 EXPORT_SYMBOL(acpi_register_ioapic);
830
acpi_unregister_ioapic(acpi_handle handle,u32 gsi_base)831 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
832 {
833 int ret = -ENOSYS;
834
835 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
836 mutex_lock(&acpi_ioapic_lock);
837 ret = mp_unregister_ioapic(gsi_base);
838 mutex_unlock(&acpi_ioapic_lock);
839 #endif
840
841 return ret;
842 }
843 EXPORT_SYMBOL(acpi_unregister_ioapic);
844
845 /**
846 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
847 * has been registered
848 * @handle: ACPI handle of the IOAPIC deivce
849 * @gsi_base: GSI base associated with the IOAPIC
850 *
851 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
852 * with acpi_register_ioapic()/acpi_unregister_ioapic().
853 */
acpi_ioapic_registered(acpi_handle handle,u32 gsi_base)854 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
855 {
856 int ret = 0;
857
858 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
859 mutex_lock(&acpi_ioapic_lock);
860 ret = mp_ioapic_registered(gsi_base);
861 mutex_unlock(&acpi_ioapic_lock);
862 #endif
863
864 return ret;
865 }
866
acpi_parse_sbf(struct acpi_table_header * table)867 static int __init acpi_parse_sbf(struct acpi_table_header *table)
868 {
869 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
870
871 sbf_port = sb->cmos_index; /* Save CMOS port */
872
873 return 0;
874 }
875
876 #ifdef CONFIG_HPET_TIMER
877 #include <asm/hpet.h>
878
879 static struct resource *hpet_res __initdata;
880
acpi_parse_hpet(struct acpi_table_header * table)881 static int __init acpi_parse_hpet(struct acpi_table_header *table)
882 {
883 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
884
885 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
886 printk(KERN_WARNING PREFIX "HPET timers must be located in "
887 "memory.\n");
888 return -1;
889 }
890
891 hpet_address = hpet_tbl->address.address;
892 hpet_blockid = hpet_tbl->sequence;
893
894 /*
895 * Some broken BIOSes advertise HPET at 0x0. We really do not
896 * want to allocate a resource there.
897 */
898 if (!hpet_address) {
899 printk(KERN_WARNING PREFIX
900 "HPET id: %#x base: %#lx is invalid\n",
901 hpet_tbl->id, hpet_address);
902 return 0;
903 }
904 #ifdef CONFIG_X86_64
905 /*
906 * Some even more broken BIOSes advertise HPET at
907 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
908 * some noise:
909 */
910 if (hpet_address == 0xfed0000000000000UL) {
911 if (!hpet_force_user) {
912 printk(KERN_WARNING PREFIX "HPET id: %#x "
913 "base: 0xfed0000000000000 is bogus\n "
914 "try hpet=force on the kernel command line to "
915 "fix it up to 0xfed00000.\n", hpet_tbl->id);
916 hpet_address = 0;
917 return 0;
918 }
919 printk(KERN_WARNING PREFIX
920 "HPET id: %#x base: 0xfed0000000000000 fixed up "
921 "to 0xfed00000.\n", hpet_tbl->id);
922 hpet_address >>= 32;
923 }
924 #endif
925 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
926 hpet_tbl->id, hpet_address);
927
928 /*
929 * Allocate and initialize the HPET firmware resource for adding into
930 * the resource tree during the lateinit timeframe.
931 */
932 #define HPET_RESOURCE_NAME_SIZE 9
933 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
934
935 hpet_res->name = (void *)&hpet_res[1];
936 hpet_res->flags = IORESOURCE_MEM;
937 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
938 hpet_tbl->sequence);
939
940 hpet_res->start = hpet_address;
941 hpet_res->end = hpet_address + (1 * 1024) - 1;
942
943 return 0;
944 }
945
946 /*
947 * hpet_insert_resource inserts the HPET resources used into the resource
948 * tree.
949 */
hpet_insert_resource(void)950 static __init int hpet_insert_resource(void)
951 {
952 if (!hpet_res)
953 return 1;
954
955 return insert_resource(&iomem_resource, hpet_res);
956 }
957
958 late_initcall(hpet_insert_resource);
959
960 #else
961 #define acpi_parse_hpet NULL
962 #endif
963
acpi_parse_fadt(struct acpi_table_header * table)964 static int __init acpi_parse_fadt(struct acpi_table_header *table)
965 {
966 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
967 pr_debug("ACPI: no legacy devices present\n");
968 x86_platform.legacy.devices.pnpbios = 0;
969 }
970
971 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
972 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
973 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
974 pr_debug("ACPI: i8042 controller is absent\n");
975 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
976 }
977
978 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
979 pr_debug("ACPI: not registering RTC platform device\n");
980 x86_platform.legacy.rtc = 0;
981 }
982
983 #ifdef CONFIG_X86_PM_TIMER
984 /* detect the location of the ACPI PM Timer */
985 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
986 /* FADT rev. 2 */
987 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
988 ACPI_ADR_SPACE_SYSTEM_IO)
989 return 0;
990
991 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
992 /*
993 * "X" fields are optional extensions to the original V1.0
994 * fields, so we must selectively expand V1.0 fields if the
995 * corresponding X field is zero.
996 */
997 if (!pmtmr_ioport)
998 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
999 } else {
1000 /* FADT rev. 1 */
1001 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1002 }
1003 if (pmtmr_ioport)
1004 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1005 pmtmr_ioport);
1006 #endif
1007 return 0;
1008 }
1009
1010 #ifdef CONFIG_X86_LOCAL_APIC
1011 /*
1012 * Parse LAPIC entries in MADT
1013 * returns 0 on success, < 0 on error
1014 */
1015
early_acpi_parse_madt_lapic_addr_ovr(void)1016 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1017 {
1018 int count;
1019
1020 if (!boot_cpu_has(X86_FEATURE_APIC))
1021 return -ENODEV;
1022
1023 /*
1024 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1025 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1026 */
1027
1028 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1029 acpi_parse_lapic_addr_ovr, 0);
1030 if (count < 0) {
1031 printk(KERN_ERR PREFIX
1032 "Error parsing LAPIC address override entry\n");
1033 return count;
1034 }
1035
1036 register_lapic_address(acpi_lapic_addr);
1037
1038 return count;
1039 }
1040
acpi_parse_madt_lapic_entries(void)1041 static int __init acpi_parse_madt_lapic_entries(void)
1042 {
1043 int count;
1044 int x2count = 0;
1045 int ret;
1046 struct acpi_subtable_proc madt_proc[2];
1047
1048 if (!boot_cpu_has(X86_FEATURE_APIC))
1049 return -ENODEV;
1050
1051 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1052 acpi_parse_sapic, MAX_LOCAL_APIC);
1053
1054 if (!count) {
1055 memset(madt_proc, 0, sizeof(madt_proc));
1056 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1057 madt_proc[0].handler = acpi_parse_lapic;
1058 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1059 madt_proc[1].handler = acpi_parse_x2apic;
1060 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1061 sizeof(struct acpi_table_madt),
1062 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1063 if (ret < 0) {
1064 printk(KERN_ERR PREFIX
1065 "Error parsing LAPIC/X2APIC entries\n");
1066 return ret;
1067 }
1068
1069 count = madt_proc[0].count;
1070 x2count = madt_proc[1].count;
1071 }
1072 if (!count && !x2count) {
1073 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1074 /* TBD: Cleanup to allow fallback to MPS */
1075 return -ENODEV;
1076 } else if (count < 0 || x2count < 0) {
1077 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1078 /* TBD: Cleanup to allow fallback to MPS */
1079 return count;
1080 }
1081
1082 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1083 acpi_parse_x2apic_nmi, 0);
1084 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1085 acpi_parse_lapic_nmi, 0);
1086 if (count < 0 || x2count < 0) {
1087 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1088 /* TBD: Cleanup to allow fallback to MPS */
1089 return count;
1090 }
1091 return 0;
1092 }
1093 #endif /* CONFIG_X86_LOCAL_APIC */
1094
1095 #ifdef CONFIG_X86_IO_APIC
mp_config_acpi_legacy_irqs(void)1096 static void __init mp_config_acpi_legacy_irqs(void)
1097 {
1098 int i;
1099 struct mpc_intsrc mp_irq;
1100
1101 #ifdef CONFIG_EISA
1102 /*
1103 * Fabricate the legacy ISA bus (bus #31).
1104 */
1105 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1106 #endif
1107 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1108 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1109
1110 /*
1111 * Use the default configuration for the IRQs 0-15. Unless
1112 * overridden by (MADT) interrupt source override entries.
1113 */
1114 for (i = 0; i < nr_legacy_irqs(); i++) {
1115 int ioapic, pin;
1116 unsigned int dstapic;
1117 int idx;
1118 u32 gsi;
1119
1120 /* Locate the gsi that irq i maps to. */
1121 if (acpi_isa_irq_to_gsi(i, &gsi))
1122 continue;
1123
1124 /*
1125 * Locate the IOAPIC that manages the ISA IRQ.
1126 */
1127 ioapic = mp_find_ioapic(gsi);
1128 if (ioapic < 0)
1129 continue;
1130 pin = mp_find_ioapic_pin(ioapic, gsi);
1131 dstapic = mpc_ioapic_id(ioapic);
1132
1133 for (idx = 0; idx < mp_irq_entries; idx++) {
1134 struct mpc_intsrc *irq = mp_irqs + idx;
1135
1136 /* Do we already have a mapping for this ISA IRQ? */
1137 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1138 break;
1139
1140 /* Do we already have a mapping for this IOAPIC pin */
1141 if (irq->dstapic == dstapic && irq->dstirq == pin)
1142 break;
1143 }
1144
1145 if (idx != mp_irq_entries) {
1146 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1147 continue; /* IRQ already used */
1148 }
1149
1150 mp_irq.type = MP_INTSRC;
1151 mp_irq.irqflag = 0; /* Conforming */
1152 mp_irq.srcbus = MP_ISA_BUS;
1153 mp_irq.dstapic = dstapic;
1154 mp_irq.irqtype = mp_INT;
1155 mp_irq.srcbusirq = i; /* Identity mapped */
1156 mp_irq.dstirq = pin;
1157
1158 mp_save_irq(&mp_irq);
1159 }
1160 }
1161
1162 /*
1163 * Parse IOAPIC related entries in MADT
1164 * returns 0 on success, < 0 on error
1165 */
acpi_parse_madt_ioapic_entries(void)1166 static int __init acpi_parse_madt_ioapic_entries(void)
1167 {
1168 int count;
1169
1170 /*
1171 * ACPI interpreter is required to complete interrupt setup,
1172 * so if it is off, don't enumerate the io-apics with ACPI.
1173 * If MPS is present, it will handle them,
1174 * otherwise the system will stay in PIC mode
1175 */
1176 if (acpi_disabled || acpi_noirq)
1177 return -ENODEV;
1178
1179 if (!boot_cpu_has(X86_FEATURE_APIC))
1180 return -ENODEV;
1181
1182 /*
1183 * if "noapic" boot option, don't look for IO-APICs
1184 */
1185 if (skip_ioapic_setup) {
1186 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1187 "due to 'noapic' option.\n");
1188 return -ENODEV;
1189 }
1190
1191 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1192 MAX_IO_APICS);
1193 if (!count) {
1194 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1195 return -ENODEV;
1196 } else if (count < 0) {
1197 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1198 return count;
1199 }
1200
1201 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1202 acpi_parse_int_src_ovr, nr_irqs);
1203 if (count < 0) {
1204 printk(KERN_ERR PREFIX
1205 "Error parsing interrupt source overrides entry\n");
1206 /* TBD: Cleanup to allow fallback to MPS */
1207 return count;
1208 }
1209
1210 /*
1211 * If BIOS did not supply an INT_SRC_OVR for the SCI
1212 * pretend we got one so we can set the SCI flags.
1213 */
1214 if (!acpi_sci_override_gsi)
1215 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1216 acpi_gbl_FADT.sci_interrupt);
1217
1218 /* Fill in identity legacy mappings where no override */
1219 mp_config_acpi_legacy_irqs();
1220
1221 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1222 acpi_parse_nmi_src, nr_irqs);
1223 if (count < 0) {
1224 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1225 /* TBD: Cleanup to allow fallback to MPS */
1226 return count;
1227 }
1228
1229 return 0;
1230 }
1231 #else
acpi_parse_madt_ioapic_entries(void)1232 static inline int acpi_parse_madt_ioapic_entries(void)
1233 {
1234 return -1;
1235 }
1236 #endif /* !CONFIG_X86_IO_APIC */
1237
early_acpi_process_madt(void)1238 static void __init early_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 = early_acpi_parse_madt_lapic_addr_ovr();
1249 if (!error) {
1250 acpi_lapic = 1;
1251 smp_found_config = 1;
1252 }
1253 if (error == -EINVAL) {
1254 /*
1255 * Dell Precision Workstation 410, 610 come here.
1256 */
1257 printk(KERN_ERR PREFIX
1258 "Invalid BIOS MADT, disabling ACPI\n");
1259 disable_acpi();
1260 }
1261 }
1262 #endif
1263 }
1264
acpi_process_madt(void)1265 static void __init acpi_process_madt(void)
1266 {
1267 #ifdef CONFIG_X86_LOCAL_APIC
1268 int error;
1269
1270 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1271
1272 /*
1273 * Parse MADT LAPIC entries
1274 */
1275 error = acpi_parse_madt_lapic_entries();
1276 if (!error) {
1277 acpi_lapic = 1;
1278
1279 /*
1280 * Parse MADT IO-APIC entries
1281 */
1282 mutex_lock(&acpi_ioapic_lock);
1283 error = acpi_parse_madt_ioapic_entries();
1284 mutex_unlock(&acpi_ioapic_lock);
1285 if (!error) {
1286 acpi_set_irq_model_ioapic();
1287
1288 smp_found_config = 1;
1289 }
1290 }
1291 if (error == -EINVAL) {
1292 /*
1293 * Dell Precision Workstation 410, 610 come here.
1294 */
1295 printk(KERN_ERR PREFIX
1296 "Invalid BIOS MADT, disabling ACPI\n");
1297 disable_acpi();
1298 }
1299 } else {
1300 /*
1301 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1302 * In the event an MPS table was found, forget it.
1303 * Boot with "acpi=off" to use MPS on such a system.
1304 */
1305 if (smp_found_config) {
1306 printk(KERN_WARNING PREFIX
1307 "No APIC-table, disabling MPS\n");
1308 smp_found_config = 0;
1309 }
1310 }
1311
1312 /*
1313 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1314 * processors, where MPS only supports physical.
1315 */
1316 if (acpi_lapic && acpi_ioapic)
1317 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1318 "information\n");
1319 else if (acpi_lapic)
1320 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1321 "configuration information\n");
1322 #endif
1323 return;
1324 }
1325
disable_acpi_irq(const struct dmi_system_id * d)1326 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1327 {
1328 if (!acpi_force) {
1329 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1330 d->ident);
1331 acpi_noirq_set();
1332 }
1333 return 0;
1334 }
1335
disable_acpi_pci(const struct dmi_system_id * d)1336 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1337 {
1338 if (!acpi_force) {
1339 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1340 d->ident);
1341 acpi_disable_pci();
1342 }
1343 return 0;
1344 }
1345
dmi_disable_acpi(const struct dmi_system_id * d)1346 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1347 {
1348 if (!acpi_force) {
1349 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1350 disable_acpi();
1351 } else {
1352 printk(KERN_NOTICE
1353 "Warning: DMI blacklist says broken, but acpi forced\n");
1354 }
1355 return 0;
1356 }
1357
1358 /*
1359 * Force ignoring BIOS IRQ0 override
1360 */
dmi_ignore_irq0_timer_override(const struct dmi_system_id * d)1361 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1362 {
1363 if (!acpi_skip_timer_override) {
1364 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1365 d->ident);
1366 acpi_skip_timer_override = 1;
1367 }
1368 return 0;
1369 }
1370
1371 /*
1372 * ACPI offers an alternative platform interface model that removes
1373 * ACPI hardware requirements for platforms that do not implement
1374 * the PC Architecture.
1375 *
1376 * We initialize the Hardware-reduced ACPI model here:
1377 */
acpi_reduced_hw_init(void)1378 static void __init acpi_reduced_hw_init(void)
1379 {
1380 if (acpi_gbl_reduced_hardware) {
1381 /*
1382 * Override x86_init functions and bypass legacy pic
1383 * in Hardware-reduced ACPI mode
1384 */
1385 x86_init.timers.timer_init = x86_init_noop;
1386 x86_init.irqs.pre_vector_init = x86_init_noop;
1387 legacy_pic = &null_legacy_pic;
1388 }
1389 }
1390
1391 /*
1392 * If your system is blacklisted here, but you find that acpi=force
1393 * works for you, please contact linux-acpi@vger.kernel.org
1394 */
1395 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1396 /*
1397 * Boxes that need ACPI disabled
1398 */
1399 {
1400 .callback = dmi_disable_acpi,
1401 .ident = "IBM Thinkpad",
1402 .matches = {
1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1404 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1405 },
1406 },
1407
1408 /*
1409 * Boxes that need ACPI PCI IRQ routing disabled
1410 */
1411 {
1412 .callback = disable_acpi_irq,
1413 .ident = "ASUS A7V",
1414 .matches = {
1415 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1416 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1417 /* newer BIOS, Revision 1011, does work */
1418 DMI_MATCH(DMI_BIOS_VERSION,
1419 "ASUS A7V ACPI BIOS Revision 1007"),
1420 },
1421 },
1422 {
1423 /*
1424 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1425 * for LPC bridge, which is needed for the PCI
1426 * interrupt links to work. DSDT fix is in bug 5966.
1427 * 2645, 2646 model numbers are shared with 600/600E/600X
1428 */
1429 .callback = disable_acpi_irq,
1430 .ident = "IBM Thinkpad 600 Series 2645",
1431 .matches = {
1432 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1433 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1434 },
1435 },
1436 {
1437 .callback = disable_acpi_irq,
1438 .ident = "IBM Thinkpad 600 Series 2646",
1439 .matches = {
1440 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1441 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1442 },
1443 },
1444 /*
1445 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1446 */
1447 { /* _BBN 0 bug */
1448 .callback = disable_acpi_pci,
1449 .ident = "ASUS PR-DLS",
1450 .matches = {
1451 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1452 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1453 DMI_MATCH(DMI_BIOS_VERSION,
1454 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1455 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1456 },
1457 },
1458 {
1459 .callback = disable_acpi_pci,
1460 .ident = "Acer TravelMate 36x Laptop",
1461 .matches = {
1462 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1463 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1464 },
1465 },
1466 {}
1467 };
1468
1469 /* second table for DMI checks that should run after early-quirks */
1470 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1471 /*
1472 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1473 * which includes some code which overrides all temperature
1474 * trip points to 16C if the INTIN2 input of the I/O APIC
1475 * is enabled. This input is incorrectly designated the
1476 * ISA IRQ 0 via an interrupt source override even though
1477 * it is wired to the output of the master 8259A and INTIN0
1478 * is not connected at all. Force ignoring BIOS IRQ0
1479 * override in that cases.
1480 */
1481 {
1482 .callback = dmi_ignore_irq0_timer_override,
1483 .ident = "HP nx6115 laptop",
1484 .matches = {
1485 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1486 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1487 },
1488 },
1489 {
1490 .callback = dmi_ignore_irq0_timer_override,
1491 .ident = "HP NX6125 laptop",
1492 .matches = {
1493 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1494 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1495 },
1496 },
1497 {
1498 .callback = dmi_ignore_irq0_timer_override,
1499 .ident = "HP NX6325 laptop",
1500 .matches = {
1501 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1502 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1503 },
1504 },
1505 {
1506 .callback = dmi_ignore_irq0_timer_override,
1507 .ident = "HP 6715b laptop",
1508 .matches = {
1509 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1510 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1511 },
1512 },
1513 {
1514 .callback = dmi_ignore_irq0_timer_override,
1515 .ident = "FUJITSU SIEMENS",
1516 .matches = {
1517 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1518 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1519 },
1520 },
1521 {}
1522 };
1523
1524 /*
1525 * acpi_boot_table_init() and acpi_boot_init()
1526 * called from setup_arch(), always.
1527 * 1. checksums all tables
1528 * 2. enumerates lapics
1529 * 3. enumerates io-apics
1530 *
1531 * acpi_table_init() is separate to allow reading SRAT without
1532 * other side effects.
1533 *
1534 * side effects of acpi_boot_init:
1535 * acpi_lapic = 1 if LAPIC found
1536 * acpi_ioapic = 1 if IOAPIC found
1537 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1538 * if acpi_blacklisted() acpi_disabled = 1;
1539 * acpi_irq_model=...
1540 * ...
1541 */
1542
acpi_boot_table_init(void)1543 void __init acpi_boot_table_init(void)
1544 {
1545 dmi_check_system(acpi_dmi_table);
1546
1547 /*
1548 * If acpi_disabled, bail out
1549 */
1550 if (acpi_disabled)
1551 return;
1552
1553 /*
1554 * Initialize the ACPI boot-time table parser.
1555 */
1556 if (acpi_table_init()) {
1557 disable_acpi();
1558 return;
1559 }
1560
1561 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1562
1563 /*
1564 * blacklist may disable ACPI entirely
1565 */
1566 if (acpi_blacklisted()) {
1567 if (acpi_force) {
1568 printk(KERN_WARNING PREFIX "acpi=force override\n");
1569 } else {
1570 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1571 disable_acpi();
1572 return;
1573 }
1574 }
1575 }
1576
early_acpi_boot_init(void)1577 int __init early_acpi_boot_init(void)
1578 {
1579 /*
1580 * If acpi_disabled, bail out
1581 */
1582 if (acpi_disabled)
1583 return 1;
1584
1585 /*
1586 * Process the Multiple APIC Description Table (MADT), if present
1587 */
1588 early_acpi_process_madt();
1589
1590 /*
1591 * Hardware-reduced ACPI mode initialization:
1592 */
1593 acpi_reduced_hw_init();
1594
1595 return 0;
1596 }
1597
acpi_boot_init(void)1598 int __init acpi_boot_init(void)
1599 {
1600 /* those are executed after early-quirks are executed */
1601 dmi_check_system(acpi_dmi_table_late);
1602
1603 /*
1604 * If acpi_disabled, bail out
1605 */
1606 if (acpi_disabled)
1607 return 1;
1608
1609 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1610
1611 /*
1612 * set sci_int and PM timer address
1613 */
1614 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1615
1616 /*
1617 * Process the Multiple APIC Description Table (MADT), if present
1618 */
1619 acpi_process_madt();
1620
1621 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1622 if (IS_ENABLED(CONFIG_ACPI_BGRT))
1623 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1624
1625 if (!acpi_noirq)
1626 x86_init.pci.init = pci_acpi_init;
1627
1628 return 0;
1629 }
1630
parse_acpi(char * arg)1631 static int __init parse_acpi(char *arg)
1632 {
1633 if (!arg)
1634 return -EINVAL;
1635
1636 /* "acpi=off" disables both ACPI table parsing and interpreter */
1637 if (strcmp(arg, "off") == 0) {
1638 disable_acpi();
1639 }
1640 /* acpi=force to over-ride black-list */
1641 else if (strcmp(arg, "force") == 0) {
1642 acpi_force = 1;
1643 acpi_disabled = 0;
1644 }
1645 /* acpi=strict disables out-of-spec workarounds */
1646 else if (strcmp(arg, "strict") == 0) {
1647 acpi_strict = 1;
1648 }
1649 /* acpi=rsdt use RSDT instead of XSDT */
1650 else if (strcmp(arg, "rsdt") == 0) {
1651 acpi_gbl_do_not_use_xsdt = TRUE;
1652 }
1653 /* "acpi=noirq" disables ACPI interrupt routing */
1654 else if (strcmp(arg, "noirq") == 0) {
1655 acpi_noirq_set();
1656 }
1657 /* "acpi=copy_dsdt" copys DSDT */
1658 else if (strcmp(arg, "copy_dsdt") == 0) {
1659 acpi_gbl_copy_dsdt_locally = 1;
1660 }
1661 /* "acpi=nocmcff" disables FF mode for corrected errors */
1662 else if (strcmp(arg, "nocmcff") == 0) {
1663 acpi_disable_cmcff = 1;
1664 } else {
1665 /* Core will printk when we return error. */
1666 return -EINVAL;
1667 }
1668 return 0;
1669 }
1670 early_param("acpi", parse_acpi);
1671
1672 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
parse_pci(char * arg)1673 static int __init parse_pci(char *arg)
1674 {
1675 if (arg && strcmp(arg, "noacpi") == 0)
1676 acpi_disable_pci();
1677 return 0;
1678 }
1679 early_param("pci", parse_pci);
1680
acpi_mps_check(void)1681 int __init acpi_mps_check(void)
1682 {
1683 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1684 /* mptable code is not built-in*/
1685 if (acpi_disabled || acpi_noirq) {
1686 printk(KERN_WARNING "MPS support code is not built-in.\n"
1687 "Using acpi=off or acpi=noirq or pci=noacpi "
1688 "may have problem\n");
1689 return 1;
1690 }
1691 #endif
1692 return 0;
1693 }
1694
1695 #ifdef CONFIG_X86_IO_APIC
parse_acpi_skip_timer_override(char * arg)1696 static int __init parse_acpi_skip_timer_override(char *arg)
1697 {
1698 acpi_skip_timer_override = 1;
1699 return 0;
1700 }
1701 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1702
parse_acpi_use_timer_override(char * arg)1703 static int __init parse_acpi_use_timer_override(char *arg)
1704 {
1705 acpi_use_timer_override = 1;
1706 return 0;
1707 }
1708 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1709 #endif /* CONFIG_X86_IO_APIC */
1710
setup_acpi_sci(char * s)1711 static int __init setup_acpi_sci(char *s)
1712 {
1713 if (!s)
1714 return -EINVAL;
1715 if (!strcmp(s, "edge"))
1716 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1717 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1718 else if (!strcmp(s, "level"))
1719 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1720 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1721 else if (!strcmp(s, "high"))
1722 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1723 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1724 else if (!strcmp(s, "low"))
1725 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1726 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1727 else
1728 return -EINVAL;
1729 return 0;
1730 }
1731 early_param("acpi_sci", setup_acpi_sci);
1732
__acpi_acquire_global_lock(unsigned int * lock)1733 int __acpi_acquire_global_lock(unsigned int *lock)
1734 {
1735 unsigned int old, new, val;
1736 do {
1737 old = *lock;
1738 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1739 val = cmpxchg(lock, old, new);
1740 } while (unlikely (val != old));
1741 return (new < 3) ? -1 : 0;
1742 }
1743
__acpi_release_global_lock(unsigned int * lock)1744 int __acpi_release_global_lock(unsigned int *lock)
1745 {
1746 unsigned int old, new, val;
1747 do {
1748 old = *lock;
1749 new = old & ~0x3;
1750 val = cmpxchg(lock, old, new);
1751 } while (unlikely (val != old));
1752 return old & 0x1;
1753 }
1754
arch_reserve_mem_area(acpi_physical_address addr,size_t size)1755 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1756 {
1757 e820__range_add(addr, size, E820_TYPE_ACPI);
1758 e820__update_table_print();
1759 }
1760