1 /*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/slab.h>
35 #include <linux/bootmem.h>
36 #include <linux/ioport.h>
37 #include <linux/pci.h>
38
39 #include <asm/irqdomain.h>
40 #include <asm/pci_x86.h>
41 #include <asm/pgtable.h>
42 #include <asm/io_apic.h>
43 #include <asm/apic.h>
44 #include <asm/io.h>
45 #include <asm/mpspec.h>
46 #include <asm/smp.h>
47 #include <asm/i8259.h>
48
49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
50 static int __initdata acpi_force = 0;
51 int acpi_disabled;
52 EXPORT_SYMBOL(acpi_disabled);
53
54 #ifdef CONFIG_X86_64
55 # include <asm/proto.h>
56 #endif /* X86 */
57
58 #define PREFIX "ACPI: "
59
60 int acpi_noirq; /* skip ACPI IRQ initialization */
61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
62 EXPORT_SYMBOL(acpi_pci_disabled);
63
64 int acpi_lapic;
65 int acpi_ioapic;
66 int acpi_strict;
67 int acpi_disable_cmcff;
68
69 u8 acpi_sci_flags __initdata;
70 int acpi_sci_override_gsi __initdata;
71 int acpi_skip_timer_override __initdata;
72 int acpi_use_timer_override __initdata;
73 int acpi_fix_pin2_polarity __initdata;
74
75 #ifdef CONFIG_X86_LOCAL_APIC
76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
77 #endif
78
79 /*
80 * Locks related to IOAPIC hotplug
81 * Hotplug side:
82 * ->device_hotplug_lock
83 * ->acpi_ioapic_lock
84 * ->ioapic_lock
85 * Interrupt mapping side:
86 * ->acpi_ioapic_lock
87 * ->ioapic_mutex
88 * ->ioapic_lock
89 */
90 static DEFINE_MUTEX(acpi_ioapic_lock);
91
92 /* --------------------------------------------------------------------------
93 Boot-time Configuration
94 -------------------------------------------------------------------------- */
95
96 /*
97 * The default interrupt routing model is PIC (8259). This gets
98 * overridden if IOAPICs are enumerated (below).
99 */
100 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
101
102
103 /*
104 * ISA irqs by default are the first 16 gsis but can be
105 * any gsi as specified by an interrupt source override.
106 */
107 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
109 };
110
111 #define ACPI_INVALID_GSI INT_MIN
112
113 /*
114 * This is just a simple wrapper around early_ioremap(),
115 * with sanity checks for phys == 0 and size == 0.
116 */
__acpi_map_table(unsigned long phys,unsigned long size)117 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
118 {
119
120 if (!phys || !size)
121 return NULL;
122
123 return early_ioremap(phys, size);
124 }
125
__acpi_unmap_table(char * map,unsigned long size)126 void __init __acpi_unmap_table(char *map, unsigned long size)
127 {
128 if (!map || !size)
129 return;
130
131 early_iounmap(map, size);
132 }
133
134 #ifdef CONFIG_X86_LOCAL_APIC
acpi_parse_madt(struct acpi_table_header * table)135 static int __init acpi_parse_madt(struct acpi_table_header *table)
136 {
137 struct acpi_table_madt *madt = NULL;
138
139 if (!cpu_has_apic)
140 return -EINVAL;
141
142 madt = (struct acpi_table_madt *)table;
143 if (!madt) {
144 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
145 return -ENODEV;
146 }
147
148 if (madt->address) {
149 acpi_lapic_addr = (u64) madt->address;
150
151 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
152 madt->address);
153 }
154
155 default_acpi_madt_oem_check(madt->header.oem_id,
156 madt->header.oem_table_id);
157
158 return 0;
159 }
160
161 /**
162 * acpi_register_lapic - register a local apic and generates a logic cpu number
163 * @id: local apic id to register
164 * @enabled: this cpu is enabled or not
165 *
166 * Returns the logic cpu number which maps to the local apic
167 */
acpi_register_lapic(int id,u8 enabled)168 static int acpi_register_lapic(int id, u8 enabled)
169 {
170 unsigned int ver = 0;
171
172 if (id >= MAX_LOCAL_APIC) {
173 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
174 return -EINVAL;
175 }
176
177 if (!enabled) {
178 ++disabled_cpus;
179 return -EINVAL;
180 }
181
182 if (boot_cpu_physical_apicid != -1U)
183 ver = apic_version[boot_cpu_physical_apicid];
184
185 return generic_processor_info(id, ver);
186 }
187
188 static int __init
acpi_parse_x2apic(struct acpi_subtable_header * header,const unsigned long end)189 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
190 {
191 struct acpi_madt_local_x2apic *processor = NULL;
192 int apic_id;
193 u8 enabled;
194
195 processor = (struct acpi_madt_local_x2apic *)header;
196
197 if (BAD_MADT_ENTRY(processor, end))
198 return -EINVAL;
199
200 acpi_table_print_madt_entry(header);
201
202 apic_id = processor->local_apic_id;
203 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
204 #ifdef CONFIG_X86_X2APIC
205 /*
206 * We need to register disabled CPU as well to permit
207 * counting disabled CPUs. This allows us to size
208 * cpus_possible_map more accurately, to permit
209 * to not preallocating memory for all NR_CPUS
210 * when we use CPU hotplug.
211 */
212 if (!apic->apic_id_valid(apic_id) && enabled)
213 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
214 else
215 acpi_register_lapic(apic_id, enabled);
216 #else
217 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
218 #endif
219
220 return 0;
221 }
222
223 static int __init
acpi_parse_lapic(struct acpi_subtable_header * header,const unsigned long end)224 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
225 {
226 struct acpi_madt_local_apic *processor = NULL;
227
228 processor = (struct acpi_madt_local_apic *)header;
229
230 if (BAD_MADT_ENTRY(processor, end))
231 return -EINVAL;
232
233 acpi_table_print_madt_entry(header);
234
235 /*
236 * We need to register disabled CPU as well to permit
237 * counting disabled CPUs. This allows us to size
238 * cpus_possible_map more accurately, to permit
239 * to not preallocating memory for all NR_CPUS
240 * when we use CPU hotplug.
241 */
242 acpi_register_lapic(processor->id, /* APIC ID */
243 processor->lapic_flags & ACPI_MADT_ENABLED);
244
245 return 0;
246 }
247
248 static int __init
acpi_parse_sapic(struct acpi_subtable_header * header,const unsigned long end)249 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
250 {
251 struct acpi_madt_local_sapic *processor = NULL;
252
253 processor = (struct acpi_madt_local_sapic *)header;
254
255 if (BAD_MADT_ENTRY(processor, end))
256 return -EINVAL;
257
258 acpi_table_print_madt_entry(header);
259
260 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
261 processor->lapic_flags & ACPI_MADT_ENABLED);
262
263 return 0;
264 }
265
266 static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,const unsigned long end)267 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
268 const unsigned long end)
269 {
270 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
271
272 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
273
274 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
275 return -EINVAL;
276
277 acpi_lapic_addr = lapic_addr_ovr->address;
278
279 return 0;
280 }
281
282 static int __init
acpi_parse_x2apic_nmi(struct acpi_subtable_header * header,const unsigned long end)283 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
284 const unsigned long end)
285 {
286 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
287
288 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
289
290 if (BAD_MADT_ENTRY(x2apic_nmi, end))
291 return -EINVAL;
292
293 acpi_table_print_madt_entry(header);
294
295 if (x2apic_nmi->lint != 1)
296 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
297
298 return 0;
299 }
300
301 static int __init
acpi_parse_lapic_nmi(struct acpi_subtable_header * header,const unsigned long end)302 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
303 {
304 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
305
306 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
307
308 if (BAD_MADT_ENTRY(lapic_nmi, end))
309 return -EINVAL;
310
311 acpi_table_print_madt_entry(header);
312
313 if (lapic_nmi->lint != 1)
314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
315
316 return 0;
317 }
318
319 #endif /*CONFIG_X86_LOCAL_APIC */
320
321 #ifdef CONFIG_X86_IO_APIC
322 #define MP_ISA_BUS 0
323
324 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
325 u8 trigger, u32 gsi);
326
mp_override_legacy_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)327 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
328 u32 gsi)
329 {
330 /*
331 * Check bus_irq boundary.
332 */
333 if (bus_irq >= NR_IRQS_LEGACY) {
334 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
335 return;
336 }
337
338 /*
339 * TBD: This check is for faulty timer entries, where the override
340 * erroneously sets the trigger to level, resulting in a HUGE
341 * increase of timer interrupts!
342 */
343 if ((bus_irq == 0) && (trigger == 3))
344 trigger = 1;
345
346 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
347 return;
348 /*
349 * Reset default identity mapping if gsi is also an legacy IRQ,
350 * otherwise there will be more than one entry with the same GSI
351 * and acpi_isa_irq_to_gsi() may give wrong result.
352 */
353 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
354 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
355 isa_irq_to_gsi[bus_irq] = gsi;
356 }
357
mp_config_acpi_gsi(struct device * dev,u32 gsi,int trigger,int polarity)358 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
359 int polarity)
360 {
361 #ifdef CONFIG_X86_MPPARSE
362 struct mpc_intsrc mp_irq;
363 struct pci_dev *pdev;
364 unsigned char number;
365 unsigned int devfn;
366 int ioapic;
367 u8 pin;
368
369 if (!acpi_ioapic)
370 return 0;
371 if (!dev || !dev_is_pci(dev))
372 return 0;
373
374 pdev = to_pci_dev(dev);
375 number = pdev->bus->number;
376 devfn = pdev->devfn;
377 pin = pdev->pin;
378 /* print the entry should happen on mptable identically */
379 mp_irq.type = MP_INTSRC;
380 mp_irq.irqtype = mp_INT;
381 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
382 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
383 mp_irq.srcbus = number;
384 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
385 ioapic = mp_find_ioapic(gsi);
386 mp_irq.dstapic = mpc_ioapic_id(ioapic);
387 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
388
389 mp_save_irq(&mp_irq);
390 #endif
391 return 0;
392 }
393
mp_register_ioapic_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)394 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
395 u8 trigger, u32 gsi)
396 {
397 struct mpc_intsrc mp_irq;
398 int ioapic, pin;
399
400 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
401 ioapic = mp_find_ioapic(gsi);
402 if (ioapic < 0) {
403 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
404 return ioapic;
405 }
406
407 pin = mp_find_ioapic_pin(ioapic, gsi);
408
409 mp_irq.type = MP_INTSRC;
410 mp_irq.irqtype = mp_INT;
411 mp_irq.irqflag = (trigger << 2) | polarity;
412 mp_irq.srcbus = MP_ISA_BUS;
413 mp_irq.srcbusirq = bus_irq;
414 mp_irq.dstapic = mpc_ioapic_id(ioapic);
415 mp_irq.dstirq = pin;
416
417 mp_save_irq(&mp_irq);
418
419 return 0;
420 }
421
422 static int __init
acpi_parse_ioapic(struct acpi_subtable_header * header,const unsigned long end)423 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
424 {
425 struct acpi_madt_io_apic *ioapic = NULL;
426 struct ioapic_domain_cfg cfg = {
427 .type = IOAPIC_DOMAIN_DYNAMIC,
428 .ops = &mp_ioapic_irqdomain_ops,
429 };
430
431 ioapic = (struct acpi_madt_io_apic *)header;
432
433 if (BAD_MADT_ENTRY(ioapic, end))
434 return -EINVAL;
435
436 acpi_table_print_madt_entry(header);
437
438 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
439 if (ioapic->global_irq_base < nr_legacy_irqs())
440 cfg.type = IOAPIC_DOMAIN_LEGACY;
441
442 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
443 &cfg);
444
445 return 0;
446 }
447
448 /*
449 * Parse Interrupt Source Override for the ACPI SCI
450 */
acpi_sci_ioapic_setup(u8 bus_irq,u16 polarity,u16 trigger,u32 gsi)451 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
452 {
453 if (trigger == 0) /* compatible SCI trigger is level */
454 trigger = 3;
455
456 if (polarity == 0) /* compatible SCI polarity is low */
457 polarity = 3;
458
459 /* Command-line over-ride via acpi_sci= */
460 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
461 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
462
463 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
464 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
465
466 if (bus_irq < NR_IRQS_LEGACY)
467 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
468 else
469 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
470
471 acpi_penalize_sci_irq(bus_irq, trigger, polarity);
472
473 /*
474 * stash over-ride to indicate we've been here
475 * and for later update of acpi_gbl_FADT
476 */
477 acpi_sci_override_gsi = gsi;
478 return;
479 }
480
481 static int __init
acpi_parse_int_src_ovr(struct acpi_subtable_header * header,const unsigned long end)482 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
483 const unsigned long end)
484 {
485 struct acpi_madt_interrupt_override *intsrc = NULL;
486
487 intsrc = (struct acpi_madt_interrupt_override *)header;
488
489 if (BAD_MADT_ENTRY(intsrc, end))
490 return -EINVAL;
491
492 acpi_table_print_madt_entry(header);
493
494 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
495 acpi_sci_ioapic_setup(intsrc->source_irq,
496 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
497 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
498 intsrc->global_irq);
499 return 0;
500 }
501
502 if (intsrc->source_irq == 0) {
503 if (acpi_skip_timer_override) {
504 printk(PREFIX "BIOS IRQ0 override ignored.\n");
505 return 0;
506 }
507
508 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
509 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
510 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
511 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
512 }
513 }
514
515 mp_override_legacy_irq(intsrc->source_irq,
516 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
517 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
518 intsrc->global_irq);
519
520 return 0;
521 }
522
523 static int __init
acpi_parse_nmi_src(struct acpi_subtable_header * header,const unsigned long end)524 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
525 {
526 struct acpi_madt_nmi_source *nmi_src = NULL;
527
528 nmi_src = (struct acpi_madt_nmi_source *)header;
529
530 if (BAD_MADT_ENTRY(nmi_src, end))
531 return -EINVAL;
532
533 acpi_table_print_madt_entry(header);
534
535 /* TBD: Support nimsrc entries? */
536
537 return 0;
538 }
539
540 #endif /* CONFIG_X86_IO_APIC */
541
542 /*
543 * acpi_pic_sci_set_trigger()
544 *
545 * use ELCR to set PIC-mode trigger type for SCI
546 *
547 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
548 * it may require Edge Trigger -- use "acpi_sci=edge"
549 *
550 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
551 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
552 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
553 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
554 */
555
acpi_pic_sci_set_trigger(unsigned int irq,u16 trigger)556 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
557 {
558 unsigned int mask = 1 << irq;
559 unsigned int old, new;
560
561 /* Real old ELCR mask */
562 old = inb(0x4d0) | (inb(0x4d1) << 8);
563
564 /*
565 * If we use ACPI to set PCI IRQs, then we should clear ELCR
566 * since we will set it correctly as we enable the PCI irq
567 * routing.
568 */
569 new = acpi_noirq ? old : 0;
570
571 /*
572 * Update SCI information in the ELCR, it isn't in the PCI
573 * routing tables..
574 */
575 switch (trigger) {
576 case 1: /* Edge - clear */
577 new &= ~mask;
578 break;
579 case 3: /* Level - set */
580 new |= mask;
581 break;
582 }
583
584 if (old == new)
585 return;
586
587 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
588 outb(new, 0x4d0);
589 outb(new >> 8, 0x4d1);
590 }
591
acpi_gsi_to_irq(u32 gsi,unsigned int * irqp)592 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
593 {
594 int rc, irq, trigger, polarity;
595
596 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
597 *irqp = gsi;
598 return 0;
599 }
600
601 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
602 if (rc == 0) {
603 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
604 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
605 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
606 if (irq >= 0) {
607 *irqp = irq;
608 return 0;
609 }
610 }
611
612 return -1;
613 }
614 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
615
acpi_isa_irq_to_gsi(unsigned isa_irq,u32 * gsi)616 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
617 {
618 if (isa_irq < nr_legacy_irqs() &&
619 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
620 *gsi = isa_irq_to_gsi[isa_irq];
621 return 0;
622 }
623
624 return -1;
625 }
626
acpi_register_gsi_pic(struct device * dev,u32 gsi,int trigger,int polarity)627 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
628 int trigger, int polarity)
629 {
630 #ifdef CONFIG_PCI
631 /*
632 * Make sure all (legacy) PCI IRQs are set as level-triggered.
633 */
634 if (trigger == ACPI_LEVEL_SENSITIVE)
635 elcr_set_level_irq(gsi);
636 #endif
637
638 return gsi;
639 }
640
641 #ifdef CONFIG_X86_LOCAL_APIC
acpi_register_gsi_ioapic(struct device * dev,u32 gsi,int trigger,int polarity)642 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
643 int trigger, int polarity)
644 {
645 int irq = gsi;
646 #ifdef CONFIG_X86_IO_APIC
647 int node;
648 struct irq_alloc_info info;
649
650 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
651 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
652 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
653 ioapic_set_alloc_attr(&info, node, trigger, polarity);
654
655 mutex_lock(&acpi_ioapic_lock);
656 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
657 /* Don't set up the ACPI SCI because it's already set up */
658 if (irq >= 0 && enable_update_mptable &&
659 acpi_gbl_FADT.sci_interrupt != gsi)
660 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
661 mutex_unlock(&acpi_ioapic_lock);
662 #endif
663
664 return irq;
665 }
666
acpi_unregister_gsi_ioapic(u32 gsi)667 static void acpi_unregister_gsi_ioapic(u32 gsi)
668 {
669 #ifdef CONFIG_X86_IO_APIC
670 int irq;
671
672 mutex_lock(&acpi_ioapic_lock);
673 irq = mp_map_gsi_to_irq(gsi, 0, NULL);
674 if (irq > 0)
675 mp_unmap_irq(irq);
676 mutex_unlock(&acpi_ioapic_lock);
677 #endif
678 }
679 #endif
680
681 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
682 int trigger, int polarity) = acpi_register_gsi_pic;
683 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
684
685 #ifdef CONFIG_ACPI_SLEEP
686 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
687 #else
688 int (*acpi_suspend_lowlevel)(void);
689 #endif
690
691 /*
692 * success: return IRQ number (>=0)
693 * failure: return < 0
694 */
acpi_register_gsi(struct device * dev,u32 gsi,int trigger,int polarity)695 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
696 {
697 return __acpi_register_gsi(dev, gsi, trigger, polarity);
698 }
699 EXPORT_SYMBOL_GPL(acpi_register_gsi);
700
acpi_unregister_gsi(u32 gsi)701 void acpi_unregister_gsi(u32 gsi)
702 {
703 if (__acpi_unregister_gsi)
704 __acpi_unregister_gsi(gsi);
705 }
706 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
707
708 #ifdef CONFIG_X86_LOCAL_APIC
acpi_set_irq_model_ioapic(void)709 static void __init acpi_set_irq_model_ioapic(void)
710 {
711 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
712 __acpi_register_gsi = acpi_register_gsi_ioapic;
713 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
714 acpi_ioapic = 1;
715 }
716 #endif
717
718 /*
719 * ACPI based hotplug support for CPU
720 */
721 #ifdef CONFIG_ACPI_HOTPLUG_CPU
722 #include <acpi/processor.h>
723
acpi_map_cpu2node(acpi_handle handle,int cpu,int physid)724 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
725 {
726 #ifdef CONFIG_ACPI_NUMA
727 int nid;
728
729 nid = acpi_get_node(handle);
730 if (nid != -1) {
731 set_apicid_to_node(physid, nid);
732 numa_set_node(cpu, nid);
733 }
734 #endif
735 }
736
acpi_map_cpu(acpi_handle handle,phys_cpuid_t physid,int * pcpu)737 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
738 {
739 int cpu;
740
741 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
742 if (cpu < 0) {
743 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
744 return cpu;
745 }
746
747 acpi_processor_set_pdc(handle);
748 acpi_map_cpu2node(handle, cpu, physid);
749
750 *pcpu = cpu;
751 return 0;
752 }
753 EXPORT_SYMBOL(acpi_map_cpu);
754
acpi_unmap_cpu(int cpu)755 int acpi_unmap_cpu(int cpu)
756 {
757 #ifdef CONFIG_ACPI_NUMA
758 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
759 #endif
760
761 per_cpu(x86_cpu_to_apicid, cpu) = -1;
762 set_cpu_present(cpu, false);
763 num_processors--;
764
765 return (0);
766 }
767 EXPORT_SYMBOL(acpi_unmap_cpu);
768 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
769
acpi_register_ioapic(acpi_handle handle,u64 phys_addr,u32 gsi_base)770 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
771 {
772 int ret = -ENOSYS;
773 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
774 int ioapic_id;
775 u64 addr;
776 struct ioapic_domain_cfg cfg = {
777 .type = IOAPIC_DOMAIN_DYNAMIC,
778 .ops = &mp_ioapic_irqdomain_ops,
779 };
780
781 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
782 if (ioapic_id < 0) {
783 unsigned long long uid;
784 acpi_status status;
785
786 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
787 NULL, &uid);
788 if (ACPI_FAILURE(status)) {
789 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
790 return -EINVAL;
791 }
792 ioapic_id = (int)uid;
793 }
794
795 mutex_lock(&acpi_ioapic_lock);
796 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
797 mutex_unlock(&acpi_ioapic_lock);
798 #endif
799
800 return ret;
801 }
802 EXPORT_SYMBOL(acpi_register_ioapic);
803
acpi_unregister_ioapic(acpi_handle handle,u32 gsi_base)804 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
805 {
806 int ret = -ENOSYS;
807
808 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
809 mutex_lock(&acpi_ioapic_lock);
810 ret = mp_unregister_ioapic(gsi_base);
811 mutex_unlock(&acpi_ioapic_lock);
812 #endif
813
814 return ret;
815 }
816 EXPORT_SYMBOL(acpi_unregister_ioapic);
817
818 /**
819 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
820 * has been registered
821 * @handle: ACPI handle of the IOAPIC deivce
822 * @gsi_base: GSI base associated with the IOAPIC
823 *
824 * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
825 * with acpi_register_ioapic()/acpi_unregister_ioapic().
826 */
acpi_ioapic_registered(acpi_handle handle,u32 gsi_base)827 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
828 {
829 int ret = 0;
830
831 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
832 mutex_lock(&acpi_ioapic_lock);
833 ret = mp_ioapic_registered(gsi_base);
834 mutex_unlock(&acpi_ioapic_lock);
835 #endif
836
837 return ret;
838 }
839
acpi_parse_sbf(struct acpi_table_header * table)840 static int __init acpi_parse_sbf(struct acpi_table_header *table)
841 {
842 struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
843
844 sbf_port = sb->cmos_index; /* Save CMOS port */
845
846 return 0;
847 }
848
849 #ifdef CONFIG_HPET_TIMER
850 #include <asm/hpet.h>
851
852 static struct resource *hpet_res __initdata;
853
acpi_parse_hpet(struct acpi_table_header * table)854 static int __init acpi_parse_hpet(struct acpi_table_header *table)
855 {
856 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
857
858 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
859 printk(KERN_WARNING PREFIX "HPET timers must be located in "
860 "memory.\n");
861 return -1;
862 }
863
864 hpet_address = hpet_tbl->address.address;
865 hpet_blockid = hpet_tbl->sequence;
866
867 /*
868 * Some broken BIOSes advertise HPET at 0x0. We really do not
869 * want to allocate a resource there.
870 */
871 if (!hpet_address) {
872 printk(KERN_WARNING PREFIX
873 "HPET id: %#x base: %#lx is invalid\n",
874 hpet_tbl->id, hpet_address);
875 return 0;
876 }
877 #ifdef CONFIG_X86_64
878 /*
879 * Some even more broken BIOSes advertise HPET at
880 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
881 * some noise:
882 */
883 if (hpet_address == 0xfed0000000000000UL) {
884 if (!hpet_force_user) {
885 printk(KERN_WARNING PREFIX "HPET id: %#x "
886 "base: 0xfed0000000000000 is bogus\n "
887 "try hpet=force on the kernel command line to "
888 "fix it up to 0xfed00000.\n", hpet_tbl->id);
889 hpet_address = 0;
890 return 0;
891 }
892 printk(KERN_WARNING PREFIX
893 "HPET id: %#x base: 0xfed0000000000000 fixed up "
894 "to 0xfed00000.\n", hpet_tbl->id);
895 hpet_address >>= 32;
896 }
897 #endif
898 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
899 hpet_tbl->id, hpet_address);
900
901 /*
902 * Allocate and initialize the HPET firmware resource for adding into
903 * the resource tree during the lateinit timeframe.
904 */
905 #define HPET_RESOURCE_NAME_SIZE 9
906 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
907
908 hpet_res->name = (void *)&hpet_res[1];
909 hpet_res->flags = IORESOURCE_MEM;
910 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
911 hpet_tbl->sequence);
912
913 hpet_res->start = hpet_address;
914 hpet_res->end = hpet_address + (1 * 1024) - 1;
915
916 return 0;
917 }
918
919 /*
920 * hpet_insert_resource inserts the HPET resources used into the resource
921 * tree.
922 */
hpet_insert_resource(void)923 static __init int hpet_insert_resource(void)
924 {
925 if (!hpet_res)
926 return 1;
927
928 return insert_resource(&iomem_resource, hpet_res);
929 }
930
931 late_initcall(hpet_insert_resource);
932
933 #else
934 #define acpi_parse_hpet NULL
935 #endif
936
acpi_parse_fadt(struct acpi_table_header * table)937 static int __init acpi_parse_fadt(struct acpi_table_header *table)
938 {
939
940 #ifdef CONFIG_X86_PM_TIMER
941 /* detect the location of the ACPI PM Timer */
942 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
943 /* FADT rev. 2 */
944 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
945 ACPI_ADR_SPACE_SYSTEM_IO)
946 return 0;
947
948 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
949 /*
950 * "X" fields are optional extensions to the original V1.0
951 * fields, so we must selectively expand V1.0 fields if the
952 * corresponding X field is zero.
953 */
954 if (!pmtmr_ioport)
955 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
956 } else {
957 /* FADT rev. 1 */
958 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
959 }
960 if (pmtmr_ioport)
961 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
962 pmtmr_ioport);
963 #endif
964 return 0;
965 }
966
967 #ifdef CONFIG_X86_LOCAL_APIC
968 /*
969 * Parse LAPIC entries in MADT
970 * returns 0 on success, < 0 on error
971 */
972
early_acpi_parse_madt_lapic_addr_ovr(void)973 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
974 {
975 int count;
976
977 if (!cpu_has_apic)
978 return -ENODEV;
979
980 /*
981 * Note that the LAPIC address is obtained from the MADT (32-bit value)
982 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
983 */
984
985 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
986 acpi_parse_lapic_addr_ovr, 0);
987 if (count < 0) {
988 printk(KERN_ERR PREFIX
989 "Error parsing LAPIC address override entry\n");
990 return count;
991 }
992
993 register_lapic_address(acpi_lapic_addr);
994
995 return count;
996 }
997
acpi_parse_madt_lapic_entries(void)998 static int __init acpi_parse_madt_lapic_entries(void)
999 {
1000 int count;
1001 int x2count = 0;
1002 int ret;
1003 struct acpi_subtable_proc madt_proc[2];
1004
1005 if (!cpu_has_apic)
1006 return -ENODEV;
1007
1008 /*
1009 * Note that the LAPIC address is obtained from the MADT (32-bit value)
1010 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
1011 */
1012
1013 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1014 acpi_parse_lapic_addr_ovr, 0);
1015 if (count < 0) {
1016 printk(KERN_ERR PREFIX
1017 "Error parsing LAPIC address override entry\n");
1018 return count;
1019 }
1020
1021 register_lapic_address(acpi_lapic_addr);
1022
1023 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1024 acpi_parse_sapic, MAX_LOCAL_APIC);
1025
1026 if (!count) {
1027 memset(madt_proc, 0, sizeof(madt_proc));
1028 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1029 madt_proc[0].handler = acpi_parse_lapic;
1030 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1031 madt_proc[1].handler = acpi_parse_x2apic;
1032 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1033 sizeof(struct acpi_table_madt),
1034 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1035 if (ret < 0) {
1036 printk(KERN_ERR PREFIX
1037 "Error parsing LAPIC/X2APIC entries\n");
1038 return ret;
1039 }
1040
1041 x2count = madt_proc[0].count;
1042 count = madt_proc[1].count;
1043 }
1044 if (!count && !x2count) {
1045 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1046 /* TBD: Cleanup to allow fallback to MPS */
1047 return -ENODEV;
1048 } else if (count < 0 || x2count < 0) {
1049 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1050 /* TBD: Cleanup to allow fallback to MPS */
1051 return count;
1052 }
1053
1054 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1055 acpi_parse_x2apic_nmi, 0);
1056 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1057 acpi_parse_lapic_nmi, 0);
1058 if (count < 0 || x2count < 0) {
1059 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1060 /* TBD: Cleanup to allow fallback to MPS */
1061 return count;
1062 }
1063 return 0;
1064 }
1065 #endif /* CONFIG_X86_LOCAL_APIC */
1066
1067 #ifdef CONFIG_X86_IO_APIC
mp_config_acpi_legacy_irqs(void)1068 static void __init mp_config_acpi_legacy_irqs(void)
1069 {
1070 int i;
1071 struct mpc_intsrc mp_irq;
1072
1073 #ifdef CONFIG_EISA
1074 /*
1075 * Fabricate the legacy ISA bus (bus #31).
1076 */
1077 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1078 #endif
1079 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1080 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1081
1082 /*
1083 * Use the default configuration for the IRQs 0-15. Unless
1084 * overridden by (MADT) interrupt source override entries.
1085 */
1086 for (i = 0; i < nr_legacy_irqs(); i++) {
1087 int ioapic, pin;
1088 unsigned int dstapic;
1089 int idx;
1090 u32 gsi;
1091
1092 /* Locate the gsi that irq i maps to. */
1093 if (acpi_isa_irq_to_gsi(i, &gsi))
1094 continue;
1095
1096 /*
1097 * Locate the IOAPIC that manages the ISA IRQ.
1098 */
1099 ioapic = mp_find_ioapic(gsi);
1100 if (ioapic < 0)
1101 continue;
1102 pin = mp_find_ioapic_pin(ioapic, gsi);
1103 dstapic = mpc_ioapic_id(ioapic);
1104
1105 for (idx = 0; idx < mp_irq_entries; idx++) {
1106 struct mpc_intsrc *irq = mp_irqs + idx;
1107
1108 /* Do we already have a mapping for this ISA IRQ? */
1109 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1110 break;
1111
1112 /* Do we already have a mapping for this IOAPIC pin */
1113 if (irq->dstapic == dstapic && irq->dstirq == pin)
1114 break;
1115 }
1116
1117 if (idx != mp_irq_entries) {
1118 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1119 continue; /* IRQ already used */
1120 }
1121
1122 mp_irq.type = MP_INTSRC;
1123 mp_irq.irqflag = 0; /* Conforming */
1124 mp_irq.srcbus = MP_ISA_BUS;
1125 mp_irq.dstapic = dstapic;
1126 mp_irq.irqtype = mp_INT;
1127 mp_irq.srcbusirq = i; /* Identity mapped */
1128 mp_irq.dstirq = pin;
1129
1130 mp_save_irq(&mp_irq);
1131 }
1132 }
1133
1134 /*
1135 * Parse IOAPIC related entries in MADT
1136 * returns 0 on success, < 0 on error
1137 */
acpi_parse_madt_ioapic_entries(void)1138 static int __init acpi_parse_madt_ioapic_entries(void)
1139 {
1140 int count;
1141
1142 /*
1143 * ACPI interpreter is required to complete interrupt setup,
1144 * so if it is off, don't enumerate the io-apics with ACPI.
1145 * If MPS is present, it will handle them,
1146 * otherwise the system will stay in PIC mode
1147 */
1148 if (acpi_disabled || acpi_noirq)
1149 return -ENODEV;
1150
1151 if (!cpu_has_apic)
1152 return -ENODEV;
1153
1154 /*
1155 * if "noapic" boot option, don't look for IO-APICs
1156 */
1157 if (skip_ioapic_setup) {
1158 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1159 "due to 'noapic' option.\n");
1160 return -ENODEV;
1161 }
1162
1163 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1164 MAX_IO_APICS);
1165 if (!count) {
1166 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1167 return -ENODEV;
1168 } else if (count < 0) {
1169 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1170 return count;
1171 }
1172
1173 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1174 acpi_parse_int_src_ovr, 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 = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1194 acpi_parse_nmi_src, nr_irqs);
1195 if (count < 0) {
1196 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1197 /* TBD: Cleanup to allow fallback to MPS */
1198 return count;
1199 }
1200
1201 return 0;
1202 }
1203 #else
acpi_parse_madt_ioapic_entries(void)1204 static inline int acpi_parse_madt_ioapic_entries(void)
1205 {
1206 return -1;
1207 }
1208 #endif /* !CONFIG_X86_IO_APIC */
1209
early_acpi_process_madt(void)1210 static void __init early_acpi_process_madt(void)
1211 {
1212 #ifdef CONFIG_X86_LOCAL_APIC
1213 int error;
1214
1215 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1216
1217 /*
1218 * Parse MADT LAPIC entries
1219 */
1220 error = early_acpi_parse_madt_lapic_addr_ovr();
1221 if (!error) {
1222 acpi_lapic = 1;
1223 smp_found_config = 1;
1224 }
1225 if (error == -EINVAL) {
1226 /*
1227 * Dell Precision Workstation 410, 610 come here.
1228 */
1229 printk(KERN_ERR PREFIX
1230 "Invalid BIOS MADT, disabling ACPI\n");
1231 disable_acpi();
1232 }
1233 }
1234 #endif
1235 }
1236
acpi_process_madt(void)1237 static void __init acpi_process_madt(void)
1238 {
1239 #ifdef CONFIG_X86_LOCAL_APIC
1240 int error;
1241
1242 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1243
1244 /*
1245 * Parse MADT LAPIC entries
1246 */
1247 error = acpi_parse_madt_lapic_entries();
1248 if (!error) {
1249 acpi_lapic = 1;
1250
1251 /*
1252 * Parse MADT IO-APIC entries
1253 */
1254 mutex_lock(&acpi_ioapic_lock);
1255 error = acpi_parse_madt_ioapic_entries();
1256 mutex_unlock(&acpi_ioapic_lock);
1257 if (!error) {
1258 acpi_set_irq_model_ioapic();
1259
1260 smp_found_config = 1;
1261 }
1262 }
1263 if (error == -EINVAL) {
1264 /*
1265 * Dell Precision Workstation 410, 610 come here.
1266 */
1267 printk(KERN_ERR PREFIX
1268 "Invalid BIOS MADT, disabling ACPI\n");
1269 disable_acpi();
1270 }
1271 } else {
1272 /*
1273 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1274 * In the event an MPS table was found, forget it.
1275 * Boot with "acpi=off" to use MPS on such a system.
1276 */
1277 if (smp_found_config) {
1278 printk(KERN_WARNING PREFIX
1279 "No APIC-table, disabling MPS\n");
1280 smp_found_config = 0;
1281 }
1282 }
1283
1284 /*
1285 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1286 * processors, where MPS only supports physical.
1287 */
1288 if (acpi_lapic && acpi_ioapic)
1289 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1290 "information\n");
1291 else if (acpi_lapic)
1292 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1293 "configuration information\n");
1294 #endif
1295 return;
1296 }
1297
disable_acpi_irq(const struct dmi_system_id * d)1298 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1299 {
1300 if (!acpi_force) {
1301 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1302 d->ident);
1303 acpi_noirq_set();
1304 }
1305 return 0;
1306 }
1307
disable_acpi_pci(const struct dmi_system_id * d)1308 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1309 {
1310 if (!acpi_force) {
1311 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1312 d->ident);
1313 acpi_disable_pci();
1314 }
1315 return 0;
1316 }
1317
dmi_disable_acpi(const struct dmi_system_id * d)1318 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1319 {
1320 if (!acpi_force) {
1321 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1322 disable_acpi();
1323 } else {
1324 printk(KERN_NOTICE
1325 "Warning: DMI blacklist says broken, but acpi forced\n");
1326 }
1327 return 0;
1328 }
1329
1330 /*
1331 * Force ignoring BIOS IRQ0 override
1332 */
dmi_ignore_irq0_timer_override(const struct dmi_system_id * d)1333 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1334 {
1335 if (!acpi_skip_timer_override) {
1336 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1337 d->ident);
1338 acpi_skip_timer_override = 1;
1339 }
1340 return 0;
1341 }
1342
1343 /*
1344 * ACPI offers an alternative platform interface model that removes
1345 * ACPI hardware requirements for platforms that do not implement
1346 * the PC Architecture.
1347 *
1348 * We initialize the Hardware-reduced ACPI model here:
1349 */
acpi_reduced_hw_init(void)1350 static void __init acpi_reduced_hw_init(void)
1351 {
1352 if (acpi_gbl_reduced_hardware) {
1353 /*
1354 * Override x86_init functions and bypass legacy pic
1355 * in Hardware-reduced ACPI mode
1356 */
1357 x86_init.timers.timer_init = x86_init_noop;
1358 x86_init.irqs.pre_vector_init = x86_init_noop;
1359 legacy_pic = &null_legacy_pic;
1360 }
1361 }
1362
1363 /*
1364 * If your system is blacklisted here, but you find that acpi=force
1365 * works for you, please contact linux-acpi@vger.kernel.org
1366 */
1367 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1368 /*
1369 * Boxes that need ACPI disabled
1370 */
1371 {
1372 .callback = dmi_disable_acpi,
1373 .ident = "IBM Thinkpad",
1374 .matches = {
1375 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1376 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1377 },
1378 },
1379
1380 /*
1381 * Boxes that need ACPI PCI IRQ routing disabled
1382 */
1383 {
1384 .callback = disable_acpi_irq,
1385 .ident = "ASUS A7V",
1386 .matches = {
1387 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1388 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1389 /* newer BIOS, Revision 1011, does work */
1390 DMI_MATCH(DMI_BIOS_VERSION,
1391 "ASUS A7V ACPI BIOS Revision 1007"),
1392 },
1393 },
1394 {
1395 /*
1396 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1397 * for LPC bridge, which is needed for the PCI
1398 * interrupt links to work. DSDT fix is in bug 5966.
1399 * 2645, 2646 model numbers are shared with 600/600E/600X
1400 */
1401 .callback = disable_acpi_irq,
1402 .ident = "IBM Thinkpad 600 Series 2645",
1403 .matches = {
1404 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1405 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1406 },
1407 },
1408 {
1409 .callback = disable_acpi_irq,
1410 .ident = "IBM Thinkpad 600 Series 2646",
1411 .matches = {
1412 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1413 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1414 },
1415 },
1416 /*
1417 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1418 */
1419 { /* _BBN 0 bug */
1420 .callback = disable_acpi_pci,
1421 .ident = "ASUS PR-DLS",
1422 .matches = {
1423 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1424 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1425 DMI_MATCH(DMI_BIOS_VERSION,
1426 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1427 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1428 },
1429 },
1430 {
1431 .callback = disable_acpi_pci,
1432 .ident = "Acer TravelMate 36x Laptop",
1433 .matches = {
1434 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1435 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1436 },
1437 },
1438 {}
1439 };
1440
1441 /* second table for DMI checks that should run after early-quirks */
1442 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1443 /*
1444 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1445 * which includes some code which overrides all temperature
1446 * trip points to 16C if the INTIN2 input of the I/O APIC
1447 * is enabled. This input is incorrectly designated the
1448 * ISA IRQ 0 via an interrupt source override even though
1449 * it is wired to the output of the master 8259A and INTIN0
1450 * is not connected at all. Force ignoring BIOS IRQ0
1451 * override in that cases.
1452 */
1453 {
1454 .callback = dmi_ignore_irq0_timer_override,
1455 .ident = "HP nx6115 laptop",
1456 .matches = {
1457 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1458 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1459 },
1460 },
1461 {
1462 .callback = dmi_ignore_irq0_timer_override,
1463 .ident = "HP NX6125 laptop",
1464 .matches = {
1465 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1466 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1467 },
1468 },
1469 {
1470 .callback = dmi_ignore_irq0_timer_override,
1471 .ident = "HP NX6325 laptop",
1472 .matches = {
1473 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1474 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1475 },
1476 },
1477 {
1478 .callback = dmi_ignore_irq0_timer_override,
1479 .ident = "HP 6715b laptop",
1480 .matches = {
1481 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1482 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1483 },
1484 },
1485 {
1486 .callback = dmi_ignore_irq0_timer_override,
1487 .ident = "FUJITSU SIEMENS",
1488 .matches = {
1489 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1490 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1491 },
1492 },
1493 {}
1494 };
1495
1496 /*
1497 * acpi_boot_table_init() and acpi_boot_init()
1498 * called from setup_arch(), always.
1499 * 1. checksums all tables
1500 * 2. enumerates lapics
1501 * 3. enumerates io-apics
1502 *
1503 * acpi_table_init() is separate to allow reading SRAT without
1504 * other side effects.
1505 *
1506 * side effects of acpi_boot_init:
1507 * acpi_lapic = 1 if LAPIC found
1508 * acpi_ioapic = 1 if IOAPIC found
1509 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1510 * if acpi_blacklisted() acpi_disabled = 1;
1511 * acpi_irq_model=...
1512 * ...
1513 */
1514
acpi_boot_table_init(void)1515 void __init acpi_boot_table_init(void)
1516 {
1517 dmi_check_system(acpi_dmi_table);
1518
1519 /*
1520 * If acpi_disabled, bail out
1521 */
1522 if (acpi_disabled)
1523 return;
1524
1525 /*
1526 * Initialize the ACPI boot-time table parser.
1527 */
1528 if (acpi_table_init()) {
1529 disable_acpi();
1530 return;
1531 }
1532
1533 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1534
1535 /*
1536 * blacklist may disable ACPI entirely
1537 */
1538 if (acpi_blacklisted()) {
1539 if (acpi_force) {
1540 printk(KERN_WARNING PREFIX "acpi=force override\n");
1541 } else {
1542 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1543 disable_acpi();
1544 return;
1545 }
1546 }
1547 }
1548
early_acpi_boot_init(void)1549 int __init early_acpi_boot_init(void)
1550 {
1551 /*
1552 * If acpi_disabled, bail out
1553 */
1554 if (acpi_disabled)
1555 return 1;
1556
1557 /*
1558 * Process the Multiple APIC Description Table (MADT), if present
1559 */
1560 early_acpi_process_madt();
1561
1562 /*
1563 * Hardware-reduced ACPI mode initialization:
1564 */
1565 acpi_reduced_hw_init();
1566
1567 return 0;
1568 }
1569
acpi_boot_init(void)1570 int __init acpi_boot_init(void)
1571 {
1572 /* those are executed after early-quirks are executed */
1573 dmi_check_system(acpi_dmi_table_late);
1574
1575 /*
1576 * If acpi_disabled, bail out
1577 */
1578 if (acpi_disabled)
1579 return 1;
1580
1581 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1582
1583 /*
1584 * set sci_int and PM timer address
1585 */
1586 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1587
1588 /*
1589 * Process the Multiple APIC Description Table (MADT), if present
1590 */
1591 acpi_process_madt();
1592
1593 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1594
1595 if (!acpi_noirq)
1596 x86_init.pci.init = pci_acpi_init;
1597
1598 return 0;
1599 }
1600
parse_acpi(char * arg)1601 static int __init parse_acpi(char *arg)
1602 {
1603 if (!arg)
1604 return -EINVAL;
1605
1606 /* "acpi=off" disables both ACPI table parsing and interpreter */
1607 if (strcmp(arg, "off") == 0) {
1608 disable_acpi();
1609 }
1610 /* acpi=force to over-ride black-list */
1611 else if (strcmp(arg, "force") == 0) {
1612 acpi_force = 1;
1613 acpi_disabled = 0;
1614 }
1615 /* acpi=strict disables out-of-spec workarounds */
1616 else if (strcmp(arg, "strict") == 0) {
1617 acpi_strict = 1;
1618 }
1619 /* acpi=rsdt use RSDT instead of XSDT */
1620 else if (strcmp(arg, "rsdt") == 0) {
1621 acpi_gbl_do_not_use_xsdt = TRUE;
1622 }
1623 /* "acpi=noirq" disables ACPI interrupt routing */
1624 else if (strcmp(arg, "noirq") == 0) {
1625 acpi_noirq_set();
1626 }
1627 /* "acpi=copy_dsdt" copys DSDT */
1628 else if (strcmp(arg, "copy_dsdt") == 0) {
1629 acpi_gbl_copy_dsdt_locally = 1;
1630 }
1631 /* "acpi=nocmcff" disables FF mode for corrected errors */
1632 else if (strcmp(arg, "nocmcff") == 0) {
1633 acpi_disable_cmcff = 1;
1634 } else {
1635 /* Core will printk when we return error. */
1636 return -EINVAL;
1637 }
1638 return 0;
1639 }
1640 early_param("acpi", parse_acpi);
1641
1642 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
parse_pci(char * arg)1643 static int __init parse_pci(char *arg)
1644 {
1645 if (arg && strcmp(arg, "noacpi") == 0)
1646 acpi_disable_pci();
1647 return 0;
1648 }
1649 early_param("pci", parse_pci);
1650
acpi_mps_check(void)1651 int __init acpi_mps_check(void)
1652 {
1653 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1654 /* mptable code is not built-in*/
1655 if (acpi_disabled || acpi_noirq) {
1656 printk(KERN_WARNING "MPS support code is not built-in.\n"
1657 "Using acpi=off or acpi=noirq or pci=noacpi "
1658 "may have problem\n");
1659 return 1;
1660 }
1661 #endif
1662 return 0;
1663 }
1664
1665 #ifdef CONFIG_X86_IO_APIC
parse_acpi_skip_timer_override(char * arg)1666 static int __init parse_acpi_skip_timer_override(char *arg)
1667 {
1668 acpi_skip_timer_override = 1;
1669 return 0;
1670 }
1671 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1672
parse_acpi_use_timer_override(char * arg)1673 static int __init parse_acpi_use_timer_override(char *arg)
1674 {
1675 acpi_use_timer_override = 1;
1676 return 0;
1677 }
1678 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1679 #endif /* CONFIG_X86_IO_APIC */
1680
setup_acpi_sci(char * s)1681 static int __init setup_acpi_sci(char *s)
1682 {
1683 if (!s)
1684 return -EINVAL;
1685 if (!strcmp(s, "edge"))
1686 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1687 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1688 else if (!strcmp(s, "level"))
1689 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1690 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1691 else if (!strcmp(s, "high"))
1692 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1693 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1694 else if (!strcmp(s, "low"))
1695 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1696 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1697 else
1698 return -EINVAL;
1699 return 0;
1700 }
1701 early_param("acpi_sci", setup_acpi_sci);
1702
__acpi_acquire_global_lock(unsigned int * lock)1703 int __acpi_acquire_global_lock(unsigned int *lock)
1704 {
1705 unsigned int old, new, val;
1706 do {
1707 old = *lock;
1708 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1709 val = cmpxchg(lock, old, new);
1710 } while (unlikely (val != old));
1711 return ((new & 0x3) < 3) ? -1 : 0;
1712 }
1713
__acpi_release_global_lock(unsigned int * lock)1714 int __acpi_release_global_lock(unsigned int *lock)
1715 {
1716 unsigned int old, new, val;
1717 do {
1718 old = *lock;
1719 new = old & ~0x3;
1720 val = cmpxchg(lock, old, new);
1721 } while (unlikely (val != old));
1722 return old & 0x1;
1723 }
1724
arch_reserve_mem_area(acpi_physical_address addr,size_t size)1725 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1726 {
1727 e820_add_region(addr, size, E820_ACPI);
1728 update_e820();
1729 }
1730