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/irqdomain.h>
35 #include <linux/slab.h>
36 #include <linux/bootmem.h>
37 #include <linux/ioport.h>
38 #include <linux/pci.h>
39
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 Boot-time Configuration
81 -------------------------------------------------------------------------- */
82
83 /*
84 * The default interrupt routing model is PIC (8259). This gets
85 * overridden if IOAPICs are enumerated (below).
86 */
87 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
88
89
90 /*
91 * ISA irqs by default are the first 16 gsis but can be
92 * any gsi as specified by an interrupt source override.
93 */
94 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
95 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
96 };
97
98 #define ACPI_INVALID_GSI INT_MIN
99
100 /*
101 * This is just a simple wrapper around early_ioremap(),
102 * with sanity checks for phys == 0 and size == 0.
103 */
__acpi_map_table(unsigned long phys,unsigned long size)104 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
105 {
106
107 if (!phys || !size)
108 return NULL;
109
110 return early_ioremap(phys, size);
111 }
112
__acpi_unmap_table(char * map,unsigned long size)113 void __init __acpi_unmap_table(char *map, unsigned long size)
114 {
115 if (!map || !size)
116 return;
117
118 early_iounmap(map, size);
119 }
120
121 #ifdef CONFIG_X86_LOCAL_APIC
acpi_parse_madt(struct acpi_table_header * table)122 static int __init acpi_parse_madt(struct acpi_table_header *table)
123 {
124 struct acpi_table_madt *madt = NULL;
125
126 if (!cpu_has_apic)
127 return -EINVAL;
128
129 madt = (struct acpi_table_madt *)table;
130 if (!madt) {
131 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
132 return -ENODEV;
133 }
134
135 if (madt->address) {
136 acpi_lapic_addr = (u64) madt->address;
137
138 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
139 madt->address);
140 }
141
142 default_acpi_madt_oem_check(madt->header.oem_id,
143 madt->header.oem_table_id);
144
145 return 0;
146 }
147
148 /**
149 * acpi_register_lapic - register a local apic and generates a logic cpu number
150 * @id: local apic id to register
151 * @enabled: this cpu is enabled or not
152 *
153 * Returns the logic cpu number which maps to the local apic
154 */
acpi_register_lapic(int id,u8 enabled)155 static int acpi_register_lapic(int id, u8 enabled)
156 {
157 unsigned int ver = 0;
158
159 if (id >= MAX_LOCAL_APIC) {
160 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
161 return -EINVAL;
162 }
163
164 if (!enabled) {
165 ++disabled_cpus;
166 return -EINVAL;
167 }
168
169 if (boot_cpu_physical_apicid != -1U)
170 ver = apic_version[boot_cpu_physical_apicid];
171
172 return generic_processor_info(id, ver);
173 }
174
175 static int __init
acpi_parse_x2apic(struct acpi_subtable_header * header,const unsigned long end)176 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
177 {
178 struct acpi_madt_local_x2apic *processor = NULL;
179 int apic_id;
180 u8 enabled;
181
182 processor = (struct acpi_madt_local_x2apic *)header;
183
184 if (BAD_MADT_ENTRY(processor, end))
185 return -EINVAL;
186
187 acpi_table_print_madt_entry(header);
188
189 apic_id = processor->local_apic_id;
190 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
191 #ifdef CONFIG_X86_X2APIC
192 /*
193 * We need to register disabled CPU as well to permit
194 * counting disabled CPUs. This allows us to size
195 * cpus_possible_map more accurately, to permit
196 * to not preallocating memory for all NR_CPUS
197 * when we use CPU hotplug.
198 */
199 if (!apic->apic_id_valid(apic_id) && enabled)
200 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
201 else
202 acpi_register_lapic(apic_id, enabled);
203 #else
204 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
205 #endif
206
207 return 0;
208 }
209
210 static int __init
acpi_parse_lapic(struct acpi_subtable_header * header,const unsigned long end)211 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
212 {
213 struct acpi_madt_local_apic *processor = NULL;
214
215 processor = (struct acpi_madt_local_apic *)header;
216
217 if (BAD_MADT_ENTRY(processor, end))
218 return -EINVAL;
219
220 acpi_table_print_madt_entry(header);
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 acpi_register_lapic(processor->id, /* APIC ID */
230 processor->lapic_flags & ACPI_MADT_ENABLED);
231
232 return 0;
233 }
234
235 static int __init
acpi_parse_sapic(struct acpi_subtable_header * header,const unsigned long end)236 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
237 {
238 struct acpi_madt_local_sapic *processor = NULL;
239
240 processor = (struct acpi_madt_local_sapic *)header;
241
242 if (BAD_MADT_ENTRY(processor, end))
243 return -EINVAL;
244
245 acpi_table_print_madt_entry(header);
246
247 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
248 processor->lapic_flags & ACPI_MADT_ENABLED);
249
250 return 0;
251 }
252
253 static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,const unsigned long end)254 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
255 const unsigned long end)
256 {
257 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
258
259 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
260
261 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
262 return -EINVAL;
263
264 acpi_lapic_addr = lapic_addr_ovr->address;
265
266 return 0;
267 }
268
269 static int __init
acpi_parse_x2apic_nmi(struct acpi_subtable_header * header,const unsigned long end)270 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
271 const unsigned long end)
272 {
273 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
274
275 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
276
277 if (BAD_MADT_ENTRY(x2apic_nmi, end))
278 return -EINVAL;
279
280 acpi_table_print_madt_entry(header);
281
282 if (x2apic_nmi->lint != 1)
283 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
284
285 return 0;
286 }
287
288 static int __init
acpi_parse_lapic_nmi(struct acpi_subtable_header * header,const unsigned long end)289 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
290 {
291 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
292
293 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
294
295 if (BAD_MADT_ENTRY(lapic_nmi, end))
296 return -EINVAL;
297
298 acpi_table_print_madt_entry(header);
299
300 if (lapic_nmi->lint != 1)
301 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
302
303 return 0;
304 }
305
306 #endif /*CONFIG_X86_LOCAL_APIC */
307
308 #ifdef CONFIG_X86_IO_APIC
309 #define MP_ISA_BUS 0
310
311 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
312 u8 trigger, u32 gsi);
313
mp_override_legacy_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)314 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
315 u32 gsi)
316 {
317 /*
318 * Check bus_irq boundary.
319 */
320 if (bus_irq >= NR_IRQS_LEGACY) {
321 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
322 return;
323 }
324
325 /*
326 * TBD: This check is for faulty timer entries, where the override
327 * erroneously sets the trigger to level, resulting in a HUGE
328 * increase of timer interrupts!
329 */
330 if ((bus_irq == 0) && (trigger == 3))
331 trigger = 1;
332
333 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
334 return;
335 /*
336 * Reset default identity mapping if gsi is also an legacy IRQ,
337 * otherwise there will be more than one entry with the same GSI
338 * and acpi_isa_irq_to_gsi() may give wrong result.
339 */
340 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
341 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
342 isa_irq_to_gsi[bus_irq] = gsi;
343 }
344
mp_config_acpi_gsi(struct device * dev,u32 gsi,int trigger,int polarity)345 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
346 int polarity)
347 {
348 #ifdef CONFIG_X86_MPPARSE
349 struct mpc_intsrc mp_irq;
350 struct pci_dev *pdev;
351 unsigned char number;
352 unsigned int devfn;
353 int ioapic;
354 u8 pin;
355
356 if (!acpi_ioapic)
357 return 0;
358 if (!dev || !dev_is_pci(dev))
359 return 0;
360
361 pdev = to_pci_dev(dev);
362 number = pdev->bus->number;
363 devfn = pdev->devfn;
364 pin = pdev->pin;
365 /* print the entry should happen on mptable identically */
366 mp_irq.type = MP_INTSRC;
367 mp_irq.irqtype = mp_INT;
368 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
369 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
370 mp_irq.srcbus = number;
371 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
372 ioapic = mp_find_ioapic(gsi);
373 mp_irq.dstapic = mpc_ioapic_id(ioapic);
374 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
375
376 mp_save_irq(&mp_irq);
377 #endif
378 return 0;
379 }
380
mp_register_gsi(struct device * dev,u32 gsi,int trigger,int polarity)381 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
382 int polarity)
383 {
384 int irq, node;
385
386 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
387 return gsi;
388
389 /* Don't set up the ACPI SCI because it's already set up */
390 if (acpi_gbl_FADT.sci_interrupt == gsi)
391 return mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
392
393 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
394 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
395 node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
396 if (mp_set_gsi_attr(gsi, trigger, polarity, node)) {
397 pr_warn("Failed to set pin attr for GSI%d\n", gsi);
398 return -1;
399 }
400
401 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
402 if (irq < 0)
403 return irq;
404
405 if (enable_update_mptable)
406 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
407
408 return irq;
409 }
410
mp_unregister_gsi(u32 gsi)411 static void mp_unregister_gsi(u32 gsi)
412 {
413 int irq;
414
415 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
416 return;
417
418 if (acpi_gbl_FADT.sci_interrupt == gsi)
419 return;
420
421 irq = mp_map_gsi_to_irq(gsi, 0);
422 if (irq > 0)
423 mp_unmap_irq(irq);
424 }
425
426 static struct irq_domain_ops acpi_irqdomain_ops = {
427 .map = mp_irqdomain_map,
428 .unmap = mp_irqdomain_unmap,
429 };
430
mp_register_ioapic_irq(u8 bus_irq,u8 polarity,u8 trigger,u32 gsi)431 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
432 u8 trigger, u32 gsi)
433 {
434 struct mpc_intsrc mp_irq;
435 int ioapic, pin;
436
437 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
438 ioapic = mp_find_ioapic(gsi);
439 if (ioapic < 0) {
440 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
441 return ioapic;
442 }
443
444 pin = mp_find_ioapic_pin(ioapic, gsi);
445
446 mp_irq.type = MP_INTSRC;
447 mp_irq.irqtype = mp_INT;
448 mp_irq.irqflag = (trigger << 2) | polarity;
449 mp_irq.srcbus = MP_ISA_BUS;
450 mp_irq.srcbusirq = bus_irq;
451 mp_irq.dstapic = mpc_ioapic_id(ioapic);
452 mp_irq.dstirq = pin;
453
454 mp_save_irq(&mp_irq);
455
456 return 0;
457 }
458
459 static int __init
acpi_parse_ioapic(struct acpi_subtable_header * header,const unsigned long end)460 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
461 {
462 struct acpi_madt_io_apic *ioapic = NULL;
463 struct ioapic_domain_cfg cfg = {
464 .type = IOAPIC_DOMAIN_DYNAMIC,
465 .ops = &acpi_irqdomain_ops,
466 };
467
468 ioapic = (struct acpi_madt_io_apic *)header;
469
470 if (BAD_MADT_ENTRY(ioapic, end))
471 return -EINVAL;
472
473 acpi_table_print_madt_entry(header);
474
475 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
476 if (ioapic->global_irq_base < nr_legacy_irqs())
477 cfg.type = IOAPIC_DOMAIN_LEGACY;
478
479 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
480 &cfg);
481
482 return 0;
483 }
484
485 /*
486 * Parse Interrupt Source Override for the ACPI SCI
487 */
acpi_sci_ioapic_setup(u8 bus_irq,u16 polarity,u16 trigger,u32 gsi)488 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
489 {
490 if (trigger == 0) /* compatible SCI trigger is level */
491 trigger = 3;
492
493 if (polarity == 0) /* compatible SCI polarity is low */
494 polarity = 3;
495
496 /* Command-line over-ride via acpi_sci= */
497 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
498 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
499
500 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
501 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
502
503 if (bus_irq < NR_IRQS_LEGACY)
504 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
505 else
506 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
507
508 /*
509 * stash over-ride to indicate we've been here
510 * and for later update of acpi_gbl_FADT
511 */
512 acpi_sci_override_gsi = gsi;
513 return;
514 }
515
516 static int __init
acpi_parse_int_src_ovr(struct acpi_subtable_header * header,const unsigned long end)517 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
518 const unsigned long end)
519 {
520 struct acpi_madt_interrupt_override *intsrc = NULL;
521
522 intsrc = (struct acpi_madt_interrupt_override *)header;
523
524 if (BAD_MADT_ENTRY(intsrc, end))
525 return -EINVAL;
526
527 acpi_table_print_madt_entry(header);
528
529 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
530 acpi_sci_ioapic_setup(intsrc->source_irq,
531 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
532 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
533 intsrc->global_irq);
534 return 0;
535 }
536
537 if (intsrc->source_irq == 0) {
538 if (acpi_skip_timer_override) {
539 printk(PREFIX "BIOS IRQ0 override ignored.\n");
540 return 0;
541 }
542
543 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
544 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
545 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
546 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
547 }
548 }
549
550 mp_override_legacy_irq(intsrc->source_irq,
551 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
552 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
553 intsrc->global_irq);
554
555 return 0;
556 }
557
558 static int __init
acpi_parse_nmi_src(struct acpi_subtable_header * header,const unsigned long end)559 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
560 {
561 struct acpi_madt_nmi_source *nmi_src = NULL;
562
563 nmi_src = (struct acpi_madt_nmi_source *)header;
564
565 if (BAD_MADT_ENTRY(nmi_src, end))
566 return -EINVAL;
567
568 acpi_table_print_madt_entry(header);
569
570 /* TBD: Support nimsrc entries? */
571
572 return 0;
573 }
574
575 #endif /* CONFIG_X86_IO_APIC */
576
577 /*
578 * acpi_pic_sci_set_trigger()
579 *
580 * use ELCR to set PIC-mode trigger type for SCI
581 *
582 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
583 * it may require Edge Trigger -- use "acpi_sci=edge"
584 *
585 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
586 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
587 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
588 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
589 */
590
acpi_pic_sci_set_trigger(unsigned int irq,u16 trigger)591 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
592 {
593 unsigned int mask = 1 << irq;
594 unsigned int old, new;
595
596 /* Real old ELCR mask */
597 old = inb(0x4d0) | (inb(0x4d1) << 8);
598
599 /*
600 * If we use ACPI to set PCI IRQs, then we should clear ELCR
601 * since we will set it correctly as we enable the PCI irq
602 * routing.
603 */
604 new = acpi_noirq ? old : 0;
605
606 /*
607 * Update SCI information in the ELCR, it isn't in the PCI
608 * routing tables..
609 */
610 switch (trigger) {
611 case 1: /* Edge - clear */
612 new &= ~mask;
613 break;
614 case 3: /* Level - set */
615 new |= mask;
616 break;
617 }
618
619 if (old == new)
620 return;
621
622 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
623 outb(new, 0x4d0);
624 outb(new >> 8, 0x4d1);
625 }
626
acpi_gsi_to_irq(u32 gsi,unsigned int * irqp)627 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
628 {
629 int rc, irq, trigger, polarity;
630
631 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
632 *irqp = gsi;
633 return 0;
634 }
635
636 rc = acpi_get_override_irq(gsi, &trigger, &polarity);
637 if (rc == 0) {
638 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
639 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
640 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
641 if (irq >= 0) {
642 *irqp = irq;
643 return 0;
644 }
645 }
646 return -1;
647 }
648 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
649
acpi_isa_irq_to_gsi(unsigned isa_irq,u32 * gsi)650 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
651 {
652 if (isa_irq < nr_legacy_irqs() &&
653 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
654 *gsi = isa_irq_to_gsi[isa_irq];
655 return 0;
656 }
657
658 return -1;
659 }
660
acpi_register_gsi_pic(struct device * dev,u32 gsi,int trigger,int polarity)661 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
662 int trigger, int polarity)
663 {
664 #ifdef CONFIG_PCI
665 /*
666 * Make sure all (legacy) PCI IRQs are set as level-triggered.
667 */
668 if (trigger == ACPI_LEVEL_SENSITIVE)
669 eisa_set_level_irq(gsi);
670 #endif
671
672 return gsi;
673 }
674
acpi_register_gsi_ioapic(struct device * dev,u32 gsi,int trigger,int polarity)675 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
676 int trigger, int polarity)
677 {
678 int irq = gsi;
679
680 #ifdef CONFIG_X86_IO_APIC
681 irq = mp_register_gsi(dev, gsi, trigger, polarity);
682 #endif
683
684 return irq;
685 }
686
acpi_unregister_gsi_ioapic(u32 gsi)687 static void acpi_unregister_gsi_ioapic(u32 gsi)
688 {
689 #ifdef CONFIG_X86_IO_APIC
690 mp_unregister_gsi(gsi);
691 #endif
692 }
693
694 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
695 int trigger, int polarity) = acpi_register_gsi_pic;
696 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
697
698 #ifdef CONFIG_ACPI_SLEEP
699 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
700 #else
701 int (*acpi_suspend_lowlevel)(void);
702 #endif
703
704 /*
705 * success: return IRQ number (>=0)
706 * failure: return < 0
707 */
acpi_register_gsi(struct device * dev,u32 gsi,int trigger,int polarity)708 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
709 {
710 return __acpi_register_gsi(dev, gsi, trigger, polarity);
711 }
712 EXPORT_SYMBOL_GPL(acpi_register_gsi);
713
acpi_unregister_gsi(u32 gsi)714 void acpi_unregister_gsi(u32 gsi)
715 {
716 if (__acpi_unregister_gsi)
717 __acpi_unregister_gsi(gsi);
718 }
719 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
720
acpi_set_irq_model_ioapic(void)721 static void __init acpi_set_irq_model_ioapic(void)
722 {
723 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
724 __acpi_register_gsi = acpi_register_gsi_ioapic;
725 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
726 acpi_ioapic = 1;
727 }
728
729 /*
730 * ACPI based hotplug support for CPU
731 */
732 #ifdef CONFIG_ACPI_HOTPLUG_CPU
733 #include <acpi/processor.h>
734
acpi_map_cpu2node(acpi_handle handle,int cpu,int physid)735 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
736 {
737 #ifdef CONFIG_ACPI_NUMA
738 int nid;
739
740 nid = acpi_get_node(handle);
741 if (nid != -1) {
742 set_apicid_to_node(physid, nid);
743 numa_set_node(cpu, nid);
744 }
745 #endif
746 }
747
_acpi_map_lsapic(acpi_handle handle,int physid,int * pcpu)748 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
749 {
750 int cpu;
751
752 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
753 if (cpu < 0) {
754 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
755 return cpu;
756 }
757
758 acpi_processor_set_pdc(handle);
759 acpi_map_cpu2node(handle, cpu, physid);
760
761 *pcpu = cpu;
762 return 0;
763 }
764
765 /* wrapper to silence section mismatch warning */
acpi_map_lsapic(acpi_handle handle,int physid,int * pcpu)766 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
767 {
768 return _acpi_map_lsapic(handle, physid, pcpu);
769 }
770 EXPORT_SYMBOL(acpi_map_lsapic);
771
acpi_unmap_lsapic(int cpu)772 int acpi_unmap_lsapic(int cpu)
773 {
774 #ifdef CONFIG_ACPI_NUMA
775 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
776 #endif
777
778 per_cpu(x86_cpu_to_apicid, cpu) = -1;
779 set_cpu_present(cpu, false);
780 num_processors--;
781
782 return (0);
783 }
784
785 EXPORT_SYMBOL(acpi_unmap_lsapic);
786 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
787
acpi_register_ioapic(acpi_handle handle,u64 phys_addr,u32 gsi_base)788 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
789 {
790 /* TBD */
791 return -EINVAL;
792 }
793
794 EXPORT_SYMBOL(acpi_register_ioapic);
795
acpi_unregister_ioapic(acpi_handle handle,u32 gsi_base)796 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
797 {
798 /* TBD */
799 return -EINVAL;
800 }
801
802 EXPORT_SYMBOL(acpi_unregister_ioapic);
803
acpi_parse_sbf(struct acpi_table_header * table)804 static int __init acpi_parse_sbf(struct acpi_table_header *table)
805 {
806 struct acpi_table_boot *sb;
807
808 sb = (struct acpi_table_boot *)table;
809 if (!sb) {
810 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
811 return -ENODEV;
812 }
813
814 sbf_port = sb->cmos_index; /* Save CMOS port */
815
816 return 0;
817 }
818
819 #ifdef CONFIG_HPET_TIMER
820 #include <asm/hpet.h>
821
822 static struct resource *hpet_res __initdata;
823
acpi_parse_hpet(struct acpi_table_header * table)824 static int __init acpi_parse_hpet(struct acpi_table_header *table)
825 {
826 struct acpi_table_hpet *hpet_tbl;
827
828 hpet_tbl = (struct acpi_table_hpet *)table;
829 if (!hpet_tbl) {
830 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
831 return -ENODEV;
832 }
833
834 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
835 printk(KERN_WARNING PREFIX "HPET timers must be located in "
836 "memory.\n");
837 return -1;
838 }
839
840 hpet_address = hpet_tbl->address.address;
841 hpet_blockid = hpet_tbl->sequence;
842
843 /*
844 * Some broken BIOSes advertise HPET at 0x0. We really do not
845 * want to allocate a resource there.
846 */
847 if (!hpet_address) {
848 printk(KERN_WARNING PREFIX
849 "HPET id: %#x base: %#lx is invalid\n",
850 hpet_tbl->id, hpet_address);
851 return 0;
852 }
853 #ifdef CONFIG_X86_64
854 /*
855 * Some even more broken BIOSes advertise HPET at
856 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
857 * some noise:
858 */
859 if (hpet_address == 0xfed0000000000000UL) {
860 if (!hpet_force_user) {
861 printk(KERN_WARNING PREFIX "HPET id: %#x "
862 "base: 0xfed0000000000000 is bogus\n "
863 "try hpet=force on the kernel command line to "
864 "fix it up to 0xfed00000.\n", hpet_tbl->id);
865 hpet_address = 0;
866 return 0;
867 }
868 printk(KERN_WARNING PREFIX
869 "HPET id: %#x base: 0xfed0000000000000 fixed up "
870 "to 0xfed00000.\n", hpet_tbl->id);
871 hpet_address >>= 32;
872 }
873 #endif
874 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
875 hpet_tbl->id, hpet_address);
876
877 /*
878 * Allocate and initialize the HPET firmware resource for adding into
879 * the resource tree during the lateinit timeframe.
880 */
881 #define HPET_RESOURCE_NAME_SIZE 9
882 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
883
884 hpet_res->name = (void *)&hpet_res[1];
885 hpet_res->flags = IORESOURCE_MEM;
886 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
887 hpet_tbl->sequence);
888
889 hpet_res->start = hpet_address;
890 hpet_res->end = hpet_address + (1 * 1024) - 1;
891
892 return 0;
893 }
894
895 /*
896 * hpet_insert_resource inserts the HPET resources used into the resource
897 * tree.
898 */
hpet_insert_resource(void)899 static __init int hpet_insert_resource(void)
900 {
901 if (!hpet_res)
902 return 1;
903
904 return insert_resource(&iomem_resource, hpet_res);
905 }
906
907 late_initcall(hpet_insert_resource);
908
909 #else
910 #define acpi_parse_hpet NULL
911 #endif
912
acpi_parse_fadt(struct acpi_table_header * table)913 static int __init acpi_parse_fadt(struct acpi_table_header *table)
914 {
915
916 #ifdef CONFIG_X86_PM_TIMER
917 /* detect the location of the ACPI PM Timer */
918 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
919 /* FADT rev. 2 */
920 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
921 ACPI_ADR_SPACE_SYSTEM_IO)
922 return 0;
923
924 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
925 /*
926 * "X" fields are optional extensions to the original V1.0
927 * fields, so we must selectively expand V1.0 fields if the
928 * corresponding X field is zero.
929 */
930 if (!pmtmr_ioport)
931 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
932 } else {
933 /* FADT rev. 1 */
934 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
935 }
936 if (pmtmr_ioport)
937 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
938 pmtmr_ioport);
939 #endif
940 return 0;
941 }
942
943 #ifdef CONFIG_X86_LOCAL_APIC
944 /*
945 * Parse LAPIC entries in MADT
946 * returns 0 on success, < 0 on error
947 */
948
early_acpi_parse_madt_lapic_addr_ovr(void)949 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
950 {
951 int count;
952
953 if (!cpu_has_apic)
954 return -ENODEV;
955
956 /*
957 * Note that the LAPIC address is obtained from the MADT (32-bit value)
958 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
959 */
960
961 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
962 acpi_parse_lapic_addr_ovr, 0);
963 if (count < 0) {
964 printk(KERN_ERR PREFIX
965 "Error parsing LAPIC address override entry\n");
966 return count;
967 }
968
969 register_lapic_address(acpi_lapic_addr);
970
971 return count;
972 }
973
acpi_parse_madt_lapic_entries(void)974 static int __init acpi_parse_madt_lapic_entries(void)
975 {
976 int count;
977 int x2count = 0;
978
979 if (!cpu_has_apic)
980 return -ENODEV;
981
982 /*
983 * Note that the LAPIC address is obtained from the MADT (32-bit value)
984 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
985 */
986
987 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
988 acpi_parse_lapic_addr_ovr, 0);
989 if (count < 0) {
990 printk(KERN_ERR PREFIX
991 "Error parsing LAPIC address override entry\n");
992 return count;
993 }
994
995 register_lapic_address(acpi_lapic_addr);
996
997 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
998 acpi_parse_sapic, MAX_LOCAL_APIC);
999
1000 if (!count) {
1001 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
1002 acpi_parse_x2apic, MAX_LOCAL_APIC);
1003 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
1004 acpi_parse_lapic, MAX_LOCAL_APIC);
1005 }
1006 if (!count && !x2count) {
1007 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1008 /* TBD: Cleanup to allow fallback to MPS */
1009 return -ENODEV;
1010 } else if (count < 0 || x2count < 0) {
1011 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1012 /* TBD: Cleanup to allow fallback to MPS */
1013 return count;
1014 }
1015
1016 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1017 acpi_parse_x2apic_nmi, 0);
1018 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1019 acpi_parse_lapic_nmi, 0);
1020 if (count < 0 || x2count < 0) {
1021 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1022 /* TBD: Cleanup to allow fallback to MPS */
1023 return count;
1024 }
1025 return 0;
1026 }
1027 #endif /* CONFIG_X86_LOCAL_APIC */
1028
1029 #ifdef CONFIG_X86_IO_APIC
mp_config_acpi_legacy_irqs(void)1030 static void __init mp_config_acpi_legacy_irqs(void)
1031 {
1032 int i;
1033 struct mpc_intsrc mp_irq;
1034
1035 #ifdef CONFIG_EISA
1036 /*
1037 * Fabricate the legacy ISA bus (bus #31).
1038 */
1039 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1040 #endif
1041 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1042 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1043
1044 /*
1045 * Use the default configuration for the IRQs 0-15. Unless
1046 * overridden by (MADT) interrupt source override entries.
1047 */
1048 for (i = 0; i < nr_legacy_irqs(); i++) {
1049 int ioapic, pin;
1050 unsigned int dstapic;
1051 int idx;
1052 u32 gsi;
1053
1054 /* Locate the gsi that irq i maps to. */
1055 if (acpi_isa_irq_to_gsi(i, &gsi))
1056 continue;
1057
1058 /*
1059 * Locate the IOAPIC that manages the ISA IRQ.
1060 */
1061 ioapic = mp_find_ioapic(gsi);
1062 if (ioapic < 0)
1063 continue;
1064 pin = mp_find_ioapic_pin(ioapic, gsi);
1065 dstapic = mpc_ioapic_id(ioapic);
1066
1067 for (idx = 0; idx < mp_irq_entries; idx++) {
1068 struct mpc_intsrc *irq = mp_irqs + idx;
1069
1070 /* Do we already have a mapping for this ISA IRQ? */
1071 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1072 break;
1073
1074 /* Do we already have a mapping for this IOAPIC pin */
1075 if (irq->dstapic == dstapic && irq->dstirq == pin)
1076 break;
1077 }
1078
1079 if (idx != mp_irq_entries) {
1080 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1081 continue; /* IRQ already used */
1082 }
1083
1084 mp_irq.type = MP_INTSRC;
1085 mp_irq.irqflag = 0; /* Conforming */
1086 mp_irq.srcbus = MP_ISA_BUS;
1087 mp_irq.dstapic = dstapic;
1088 mp_irq.irqtype = mp_INT;
1089 mp_irq.srcbusirq = i; /* Identity mapped */
1090 mp_irq.dstirq = pin;
1091
1092 mp_save_irq(&mp_irq);
1093 }
1094 }
1095
1096 /*
1097 * Parse IOAPIC related entries in MADT
1098 * returns 0 on success, < 0 on error
1099 */
acpi_parse_madt_ioapic_entries(void)1100 static int __init acpi_parse_madt_ioapic_entries(void)
1101 {
1102 int count;
1103
1104 /*
1105 * ACPI interpreter is required to complete interrupt setup,
1106 * so if it is off, don't enumerate the io-apics with ACPI.
1107 * If MPS is present, it will handle them,
1108 * otherwise the system will stay in PIC mode
1109 */
1110 if (acpi_disabled || acpi_noirq)
1111 return -ENODEV;
1112
1113 if (!cpu_has_apic)
1114 return -ENODEV;
1115
1116 /*
1117 * if "noapic" boot option, don't look for IO-APICs
1118 */
1119 if (skip_ioapic_setup) {
1120 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1121 "due to 'noapic' option.\n");
1122 return -ENODEV;
1123 }
1124
1125 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1126 MAX_IO_APICS);
1127 if (!count) {
1128 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1129 return -ENODEV;
1130 } else if (count < 0) {
1131 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1132 return count;
1133 }
1134
1135 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1136 acpi_parse_int_src_ovr, nr_irqs);
1137 if (count < 0) {
1138 printk(KERN_ERR PREFIX
1139 "Error parsing interrupt source overrides entry\n");
1140 /* TBD: Cleanup to allow fallback to MPS */
1141 return count;
1142 }
1143
1144 /*
1145 * If BIOS did not supply an INT_SRC_OVR for the SCI
1146 * pretend we got one so we can set the SCI flags.
1147 */
1148 if (!acpi_sci_override_gsi)
1149 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1150 acpi_gbl_FADT.sci_interrupt);
1151
1152 /* Fill in identity legacy mappings where no override */
1153 mp_config_acpi_legacy_irqs();
1154
1155 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1156 acpi_parse_nmi_src, nr_irqs);
1157 if (count < 0) {
1158 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1159 /* TBD: Cleanup to allow fallback to MPS */
1160 return count;
1161 }
1162
1163 return 0;
1164 }
1165 #else
acpi_parse_madt_ioapic_entries(void)1166 static inline int acpi_parse_madt_ioapic_entries(void)
1167 {
1168 return -1;
1169 }
1170 #endif /* !CONFIG_X86_IO_APIC */
1171
early_acpi_process_madt(void)1172 static void __init early_acpi_process_madt(void)
1173 {
1174 #ifdef CONFIG_X86_LOCAL_APIC
1175 int error;
1176
1177 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1178
1179 /*
1180 * Parse MADT LAPIC entries
1181 */
1182 error = early_acpi_parse_madt_lapic_addr_ovr();
1183 if (!error) {
1184 acpi_lapic = 1;
1185 smp_found_config = 1;
1186 }
1187 if (error == -EINVAL) {
1188 /*
1189 * Dell Precision Workstation 410, 610 come here.
1190 */
1191 printk(KERN_ERR PREFIX
1192 "Invalid BIOS MADT, disabling ACPI\n");
1193 disable_acpi();
1194 }
1195 }
1196 #endif
1197 }
1198
acpi_process_madt(void)1199 static void __init acpi_process_madt(void)
1200 {
1201 #ifdef CONFIG_X86_LOCAL_APIC
1202 int error;
1203
1204 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1205
1206 /*
1207 * Parse MADT LAPIC entries
1208 */
1209 error = acpi_parse_madt_lapic_entries();
1210 if (!error) {
1211 acpi_lapic = 1;
1212
1213 /*
1214 * Parse MADT IO-APIC entries
1215 */
1216 error = acpi_parse_madt_ioapic_entries();
1217 if (!error) {
1218 acpi_set_irq_model_ioapic();
1219
1220 smp_found_config = 1;
1221 }
1222 }
1223 if (error == -EINVAL) {
1224 /*
1225 * Dell Precision Workstation 410, 610 come here.
1226 */
1227 printk(KERN_ERR PREFIX
1228 "Invalid BIOS MADT, disabling ACPI\n");
1229 disable_acpi();
1230 }
1231 } else {
1232 /*
1233 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1234 * In the event an MPS table was found, forget it.
1235 * Boot with "acpi=off" to use MPS on such a system.
1236 */
1237 if (smp_found_config) {
1238 printk(KERN_WARNING PREFIX
1239 "No APIC-table, disabling MPS\n");
1240 smp_found_config = 0;
1241 }
1242 }
1243
1244 /*
1245 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1246 * processors, where MPS only supports physical.
1247 */
1248 if (acpi_lapic && acpi_ioapic)
1249 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1250 "information\n");
1251 else if (acpi_lapic)
1252 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1253 "configuration information\n");
1254 #endif
1255 return;
1256 }
1257
disable_acpi_irq(const struct dmi_system_id * d)1258 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1259 {
1260 if (!acpi_force) {
1261 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1262 d->ident);
1263 acpi_noirq_set();
1264 }
1265 return 0;
1266 }
1267
disable_acpi_pci(const struct dmi_system_id * d)1268 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1269 {
1270 if (!acpi_force) {
1271 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1272 d->ident);
1273 acpi_disable_pci();
1274 }
1275 return 0;
1276 }
1277
dmi_disable_acpi(const struct dmi_system_id * d)1278 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1279 {
1280 if (!acpi_force) {
1281 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1282 disable_acpi();
1283 } else {
1284 printk(KERN_NOTICE
1285 "Warning: DMI blacklist says broken, but acpi forced\n");
1286 }
1287 return 0;
1288 }
1289
1290 /*
1291 * Force ignoring BIOS IRQ0 override
1292 */
dmi_ignore_irq0_timer_override(const struct dmi_system_id * d)1293 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1294 {
1295 if (!acpi_skip_timer_override) {
1296 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1297 d->ident);
1298 acpi_skip_timer_override = 1;
1299 }
1300 return 0;
1301 }
1302
1303 /*
1304 * If your system is blacklisted here, but you find that acpi=force
1305 * works for you, please contact linux-acpi@vger.kernel.org
1306 */
1307 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1308 /*
1309 * Boxes that need ACPI disabled
1310 */
1311 {
1312 .callback = dmi_disable_acpi,
1313 .ident = "IBM Thinkpad",
1314 .matches = {
1315 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1316 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1317 },
1318 },
1319
1320 /*
1321 * Boxes that need ACPI PCI IRQ routing disabled
1322 */
1323 {
1324 .callback = disable_acpi_irq,
1325 .ident = "ASUS A7V",
1326 .matches = {
1327 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1328 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1329 /* newer BIOS, Revision 1011, does work */
1330 DMI_MATCH(DMI_BIOS_VERSION,
1331 "ASUS A7V ACPI BIOS Revision 1007"),
1332 },
1333 },
1334 {
1335 /*
1336 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1337 * for LPC bridge, which is needed for the PCI
1338 * interrupt links to work. DSDT fix is in bug 5966.
1339 * 2645, 2646 model numbers are shared with 600/600E/600X
1340 */
1341 .callback = disable_acpi_irq,
1342 .ident = "IBM Thinkpad 600 Series 2645",
1343 .matches = {
1344 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1345 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1346 },
1347 },
1348 {
1349 .callback = disable_acpi_irq,
1350 .ident = "IBM Thinkpad 600 Series 2646",
1351 .matches = {
1352 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1353 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1354 },
1355 },
1356 /*
1357 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1358 */
1359 { /* _BBN 0 bug */
1360 .callback = disable_acpi_pci,
1361 .ident = "ASUS PR-DLS",
1362 .matches = {
1363 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1364 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1365 DMI_MATCH(DMI_BIOS_VERSION,
1366 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1367 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1368 },
1369 },
1370 {
1371 .callback = disable_acpi_pci,
1372 .ident = "Acer TravelMate 36x Laptop",
1373 .matches = {
1374 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1375 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1376 },
1377 },
1378 {}
1379 };
1380
1381 /* second table for DMI checks that should run after early-quirks */
1382 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1383 /*
1384 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1385 * which includes some code which overrides all temperature
1386 * trip points to 16C if the INTIN2 input of the I/O APIC
1387 * is enabled. This input is incorrectly designated the
1388 * ISA IRQ 0 via an interrupt source override even though
1389 * it is wired to the output of the master 8259A and INTIN0
1390 * is not connected at all. Force ignoring BIOS IRQ0
1391 * override in that cases.
1392 */
1393 {
1394 .callback = dmi_ignore_irq0_timer_override,
1395 .ident = "HP nx6115 laptop",
1396 .matches = {
1397 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1398 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1399 },
1400 },
1401 {
1402 .callback = dmi_ignore_irq0_timer_override,
1403 .ident = "HP NX6125 laptop",
1404 .matches = {
1405 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1406 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1407 },
1408 },
1409 {
1410 .callback = dmi_ignore_irq0_timer_override,
1411 .ident = "HP NX6325 laptop",
1412 .matches = {
1413 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1414 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1415 },
1416 },
1417 {
1418 .callback = dmi_ignore_irq0_timer_override,
1419 .ident = "HP 6715b laptop",
1420 .matches = {
1421 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1422 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1423 },
1424 },
1425 {
1426 .callback = dmi_ignore_irq0_timer_override,
1427 .ident = "FUJITSU SIEMENS",
1428 .matches = {
1429 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1430 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1431 },
1432 },
1433 {}
1434 };
1435
1436 /*
1437 * acpi_boot_table_init() and acpi_boot_init()
1438 * called from setup_arch(), always.
1439 * 1. checksums all tables
1440 * 2. enumerates lapics
1441 * 3. enumerates io-apics
1442 *
1443 * acpi_table_init() is separate to allow reading SRAT without
1444 * other side effects.
1445 *
1446 * side effects of acpi_boot_init:
1447 * acpi_lapic = 1 if LAPIC found
1448 * acpi_ioapic = 1 if IOAPIC found
1449 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1450 * if acpi_blacklisted() acpi_disabled = 1;
1451 * acpi_irq_model=...
1452 * ...
1453 */
1454
acpi_boot_table_init(void)1455 void __init acpi_boot_table_init(void)
1456 {
1457 dmi_check_system(acpi_dmi_table);
1458
1459 /*
1460 * If acpi_disabled, bail out
1461 */
1462 if (acpi_disabled)
1463 return;
1464
1465 /*
1466 * Initialize the ACPI boot-time table parser.
1467 */
1468 if (acpi_table_init()) {
1469 disable_acpi();
1470 return;
1471 }
1472
1473 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1474
1475 /*
1476 * blacklist may disable ACPI entirely
1477 */
1478 if (acpi_blacklisted()) {
1479 if (acpi_force) {
1480 printk(KERN_WARNING PREFIX "acpi=force override\n");
1481 } else {
1482 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1483 disable_acpi();
1484 return;
1485 }
1486 }
1487 }
1488
early_acpi_boot_init(void)1489 int __init early_acpi_boot_init(void)
1490 {
1491 /*
1492 * If acpi_disabled, bail out
1493 */
1494 if (acpi_disabled)
1495 return 1;
1496
1497 /*
1498 * Process the Multiple APIC Description Table (MADT), if present
1499 */
1500 early_acpi_process_madt();
1501
1502 return 0;
1503 }
1504
acpi_boot_init(void)1505 int __init acpi_boot_init(void)
1506 {
1507 /* those are executed after early-quirks are executed */
1508 dmi_check_system(acpi_dmi_table_late);
1509
1510 /*
1511 * If acpi_disabled, bail out
1512 */
1513 if (acpi_disabled)
1514 return 1;
1515
1516 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1517
1518 /*
1519 * set sci_int and PM timer address
1520 */
1521 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1522
1523 /*
1524 * Process the Multiple APIC Description Table (MADT), if present
1525 */
1526 acpi_process_madt();
1527
1528 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1529
1530 if (!acpi_noirq)
1531 x86_init.pci.init = pci_acpi_init;
1532
1533 return 0;
1534 }
1535
parse_acpi(char * arg)1536 static int __init parse_acpi(char *arg)
1537 {
1538 if (!arg)
1539 return -EINVAL;
1540
1541 /* "acpi=off" disables both ACPI table parsing and interpreter */
1542 if (strcmp(arg, "off") == 0) {
1543 disable_acpi();
1544 }
1545 /* acpi=force to over-ride black-list */
1546 else if (strcmp(arg, "force") == 0) {
1547 acpi_force = 1;
1548 acpi_disabled = 0;
1549 }
1550 /* acpi=strict disables out-of-spec workarounds */
1551 else if (strcmp(arg, "strict") == 0) {
1552 acpi_strict = 1;
1553 }
1554 /* acpi=rsdt use RSDT instead of XSDT */
1555 else if (strcmp(arg, "rsdt") == 0) {
1556 acpi_gbl_do_not_use_xsdt = TRUE;
1557 }
1558 /* "acpi=noirq" disables ACPI interrupt routing */
1559 else if (strcmp(arg, "noirq") == 0) {
1560 acpi_noirq_set();
1561 }
1562 /* "acpi=copy_dsdt" copys DSDT */
1563 else if (strcmp(arg, "copy_dsdt") == 0) {
1564 acpi_gbl_copy_dsdt_locally = 1;
1565 }
1566 /* "acpi=nocmcff" disables FF mode for corrected errors */
1567 else if (strcmp(arg, "nocmcff") == 0) {
1568 acpi_disable_cmcff = 1;
1569 } else {
1570 /* Core will printk when we return error. */
1571 return -EINVAL;
1572 }
1573 return 0;
1574 }
1575 early_param("acpi", parse_acpi);
1576
1577 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
parse_pci(char * arg)1578 static int __init parse_pci(char *arg)
1579 {
1580 if (arg && strcmp(arg, "noacpi") == 0)
1581 acpi_disable_pci();
1582 return 0;
1583 }
1584 early_param("pci", parse_pci);
1585
acpi_mps_check(void)1586 int __init acpi_mps_check(void)
1587 {
1588 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1589 /* mptable code is not built-in*/
1590 if (acpi_disabled || acpi_noirq) {
1591 printk(KERN_WARNING "MPS support code is not built-in.\n"
1592 "Using acpi=off or acpi=noirq or pci=noacpi "
1593 "may have problem\n");
1594 return 1;
1595 }
1596 #endif
1597 return 0;
1598 }
1599
1600 #ifdef CONFIG_X86_IO_APIC
parse_acpi_skip_timer_override(char * arg)1601 static int __init parse_acpi_skip_timer_override(char *arg)
1602 {
1603 acpi_skip_timer_override = 1;
1604 return 0;
1605 }
1606 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1607
parse_acpi_use_timer_override(char * arg)1608 static int __init parse_acpi_use_timer_override(char *arg)
1609 {
1610 acpi_use_timer_override = 1;
1611 return 0;
1612 }
1613 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1614 #endif /* CONFIG_X86_IO_APIC */
1615
setup_acpi_sci(char * s)1616 static int __init setup_acpi_sci(char *s)
1617 {
1618 if (!s)
1619 return -EINVAL;
1620 if (!strcmp(s, "edge"))
1621 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1622 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1623 else if (!strcmp(s, "level"))
1624 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1625 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1626 else if (!strcmp(s, "high"))
1627 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1628 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1629 else if (!strcmp(s, "low"))
1630 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1631 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1632 else
1633 return -EINVAL;
1634 return 0;
1635 }
1636 early_param("acpi_sci", setup_acpi_sci);
1637
__acpi_acquire_global_lock(unsigned int * lock)1638 int __acpi_acquire_global_lock(unsigned int *lock)
1639 {
1640 unsigned int old, new, val;
1641 do {
1642 old = *lock;
1643 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1644 val = cmpxchg(lock, old, new);
1645 } while (unlikely (val != old));
1646 return (new < 3) ? -1 : 0;
1647 }
1648
__acpi_release_global_lock(unsigned int * lock)1649 int __acpi_release_global_lock(unsigned int *lock)
1650 {
1651 unsigned int old, new, val;
1652 do {
1653 old = *lock;
1654 new = old & ~0x3;
1655 val = cmpxchg(lock, old, new);
1656 } while (unlikely (val != old));
1657 return old & 0x1;
1658 }
1659
arch_reserve_mem_area(acpi_physical_address addr,size_t size)1660 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1661 {
1662 e820_add_region(addr, size, E820_ACPI);
1663 update_e820();
1664 }
1665