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/bootmem.h>
35 #include <linux/ioport.h>
36 #include <linux/pci.h>
37
38 #include <asm/pgtable.h>
39 #include <asm/io_apic.h>
40 #include <asm/apic.h>
41 #include <asm/io.h>
42 #include <asm/mpspec.h>
43 #include <asm/smp.h>
44
45 static int __initdata acpi_force = 0;
46 u32 acpi_rsdt_forced;
47 int acpi_disabled;
48 EXPORT_SYMBOL(acpi_disabled);
49
50 #ifdef CONFIG_X86_64
51 # include <asm/proto.h>
52 #endif /* X86 */
53
54 #define BAD_MADT_ENTRY(entry, end) ( \
55 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
56 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
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 int acpi_ht __initdata = 1; /* enable HT */
64
65 int acpi_lapic;
66 int acpi_ioapic;
67 int acpi_strict;
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
74 #ifdef CONFIG_X86_LOCAL_APIC
75 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
76 #endif
77
78 #ifndef __HAVE_ARCH_CMPXCHG
79 #warning ACPI uses CMPXCHG, i486 and later hardware
80 #endif
81
82 /* --------------------------------------------------------------------------
83 Boot-time Configuration
84 -------------------------------------------------------------------------- */
85
86 /*
87 * The default interrupt routing model is PIC (8259). This gets
88 * overridden if IOAPICs are enumerated (below).
89 */
90 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
91
92
93 /*
94 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
95 * to map the target physical address. The problem is that set_fixmap()
96 * provides a single page, and it is possible that the page is not
97 * sufficient.
98 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
99 * i.e. until the next __va_range() call.
100 *
101 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
102 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
103 * count idx down while incrementing the phys address.
104 */
105 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
106 {
107
108 if (!phys || !size)
109 return NULL;
110
111 return early_ioremap(phys, size);
112 }
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
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 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
149 {
150 unsigned int ver = 0;
151
152 if (!enabled) {
153 ++disabled_cpus;
154 return;
155 }
156
157 if (boot_cpu_physical_apicid != -1U)
158 ver = apic_version[boot_cpu_physical_apicid];
159
160 generic_processor_info(id, ver);
161 }
162
163 static int __init
164 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
165 {
166 struct acpi_madt_local_x2apic *processor = NULL;
167
168 processor = (struct acpi_madt_local_x2apic *)header;
169
170 if (BAD_MADT_ENTRY(processor, end))
171 return -EINVAL;
172
173 acpi_table_print_madt_entry(header);
174
175 #ifdef CONFIG_X86_X2APIC
176 /*
177 * We need to register disabled CPU as well to permit
178 * counting disabled CPUs. This allows us to size
179 * cpus_possible_map more accurately, to permit
180 * to not preallocating memory for all NR_CPUS
181 * when we use CPU hotplug.
182 */
183 acpi_register_lapic(processor->local_apic_id, /* APIC ID */
184 processor->lapic_flags & ACPI_MADT_ENABLED);
185 #else
186 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
187 #endif
188
189 return 0;
190 }
191
192 static int __init
193 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
194 {
195 struct acpi_madt_local_apic *processor = NULL;
196
197 processor = (struct acpi_madt_local_apic *)header;
198
199 if (BAD_MADT_ENTRY(processor, end))
200 return -EINVAL;
201
202 acpi_table_print_madt_entry(header);
203
204 /*
205 * We need to register disabled CPU as well to permit
206 * counting disabled CPUs. This allows us to size
207 * cpus_possible_map more accurately, to permit
208 * to not preallocating memory for all NR_CPUS
209 * when we use CPU hotplug.
210 */
211 acpi_register_lapic(processor->id, /* APIC ID */
212 processor->lapic_flags & ACPI_MADT_ENABLED);
213
214 return 0;
215 }
216
217 static int __init
218 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
219 {
220 struct acpi_madt_local_sapic *processor = NULL;
221
222 processor = (struct acpi_madt_local_sapic *)header;
223
224 if (BAD_MADT_ENTRY(processor, end))
225 return -EINVAL;
226
227 acpi_table_print_madt_entry(header);
228
229 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
230 processor->lapic_flags & ACPI_MADT_ENABLED);
231
232 return 0;
233 }
234
235 static int __init
236 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
237 const unsigned long end)
238 {
239 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
240
241 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
242
243 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
244 return -EINVAL;
245
246 acpi_lapic_addr = lapic_addr_ovr->address;
247
248 return 0;
249 }
250
251 static int __init
252 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
253 const unsigned long end)
254 {
255 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
256
257 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
258
259 if (BAD_MADT_ENTRY(x2apic_nmi, end))
260 return -EINVAL;
261
262 acpi_table_print_madt_entry(header);
263
264 if (x2apic_nmi->lint != 1)
265 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
266
267 return 0;
268 }
269
270 static int __init
271 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
272 {
273 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
274
275 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
276
277 if (BAD_MADT_ENTRY(lapic_nmi, end))
278 return -EINVAL;
279
280 acpi_table_print_madt_entry(header);
281
282 if (lapic_nmi->lint != 1)
283 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
284
285 return 0;
286 }
287
288 #endif /*CONFIG_X86_LOCAL_APIC */
289
290 #ifdef CONFIG_X86_IO_APIC
291
292 static int __init
293 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
294 {
295 struct acpi_madt_io_apic *ioapic = NULL;
296
297 ioapic = (struct acpi_madt_io_apic *)header;
298
299 if (BAD_MADT_ENTRY(ioapic, end))
300 return -EINVAL;
301
302 acpi_table_print_madt_entry(header);
303
304 mp_register_ioapic(ioapic->id,
305 ioapic->address, ioapic->global_irq_base);
306
307 return 0;
308 }
309
310 /*
311 * Parse Interrupt Source Override for the ACPI SCI
312 */
313 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
314 {
315 if (trigger == 0) /* compatible SCI trigger is level */
316 trigger = 3;
317
318 if (polarity == 0) /* compatible SCI polarity is low */
319 polarity = 3;
320
321 /* Command-line over-ride via acpi_sci= */
322 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
323 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
324
325 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
326 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
327
328 /*
329 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
330 * If GSI is < 16, this will update its flags,
331 * else it will create a new mp_irqs[] entry.
332 */
333 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
334
335 /*
336 * stash over-ride to indicate we've been here
337 * and for later update of acpi_gbl_FADT
338 */
339 acpi_sci_override_gsi = gsi;
340 return;
341 }
342
343 static int __init
344 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
345 const unsigned long end)
346 {
347 struct acpi_madt_interrupt_override *intsrc = NULL;
348
349 intsrc = (struct acpi_madt_interrupt_override *)header;
350
351 if (BAD_MADT_ENTRY(intsrc, end))
352 return -EINVAL;
353
354 acpi_table_print_madt_entry(header);
355
356 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
357 acpi_sci_ioapic_setup(intsrc->global_irq,
358 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
359 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
360 return 0;
361 }
362
363 if (acpi_skip_timer_override &&
364 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
365 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
366 return 0;
367 }
368
369 mp_override_legacy_irq(intsrc->source_irq,
370 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
371 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
372 intsrc->global_irq);
373
374 return 0;
375 }
376
377 static int __init
378 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
379 {
380 struct acpi_madt_nmi_source *nmi_src = NULL;
381
382 nmi_src = (struct acpi_madt_nmi_source *)header;
383
384 if (BAD_MADT_ENTRY(nmi_src, end))
385 return -EINVAL;
386
387 acpi_table_print_madt_entry(header);
388
389 /* TBD: Support nimsrc entries? */
390
391 return 0;
392 }
393
394 #endif /* CONFIG_X86_IO_APIC */
395
396 /*
397 * acpi_pic_sci_set_trigger()
398 *
399 * use ELCR to set PIC-mode trigger type for SCI
400 *
401 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
402 * it may require Edge Trigger -- use "acpi_sci=edge"
403 *
404 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
405 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
406 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
407 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
408 */
409
410 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
411 {
412 unsigned int mask = 1 << irq;
413 unsigned int old, new;
414
415 /* Real old ELCR mask */
416 old = inb(0x4d0) | (inb(0x4d1) << 8);
417
418 /*
419 * If we use ACPI to set PCI IRQs, then we should clear ELCR
420 * since we will set it correctly as we enable the PCI irq
421 * routing.
422 */
423 new = acpi_noirq ? old : 0;
424
425 /*
426 * Update SCI information in the ELCR, it isn't in the PCI
427 * routing tables..
428 */
429 switch (trigger) {
430 case 1: /* Edge - clear */
431 new &= ~mask;
432 break;
433 case 3: /* Level - set */
434 new |= mask;
435 break;
436 }
437
438 if (old == new)
439 return;
440
441 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
442 outb(new, 0x4d0);
443 outb(new >> 8, 0x4d1);
444 }
445
446 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
447 {
448 *irq = gsi;
449
450 #ifdef CONFIG_X86_IO_APIC
451 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
452 setup_IO_APIC_irq_extra(gsi);
453 #endif
454
455 return 0;
456 }
457
458 /*
459 * success: return IRQ number (>=0)
460 * failure: return < 0
461 */
462 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
463 {
464 unsigned int irq;
465 unsigned int plat_gsi = gsi;
466
467 #ifdef CONFIG_PCI
468 /*
469 * Make sure all (legacy) PCI IRQs are set as level-triggered.
470 */
471 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
472 if (trigger == ACPI_LEVEL_SENSITIVE)
473 eisa_set_level_irq(gsi);
474 }
475 #endif
476
477 #ifdef CONFIG_X86_IO_APIC
478 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
479 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
480 }
481 #endif
482 irq = plat_gsi;
483
484 return irq;
485 }
486
487 /*
488 * ACPI based hotplug support for CPU
489 */
490 #ifdef CONFIG_ACPI_HOTPLUG_CPU
491
492 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
493 {
494 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
495 union acpi_object *obj;
496 struct acpi_madt_local_apic *lapic;
497 cpumask_var_t tmp_map, new_map;
498 u8 physid;
499 int cpu;
500 int retval = -ENOMEM;
501
502 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
503 return -EINVAL;
504
505 if (!buffer.length || !buffer.pointer)
506 return -EINVAL;
507
508 obj = buffer.pointer;
509 if (obj->type != ACPI_TYPE_BUFFER ||
510 obj->buffer.length < sizeof(*lapic)) {
511 kfree(buffer.pointer);
512 return -EINVAL;
513 }
514
515 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
516
517 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
518 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
519 kfree(buffer.pointer);
520 return -EINVAL;
521 }
522
523 physid = lapic->id;
524
525 kfree(buffer.pointer);
526 buffer.length = ACPI_ALLOCATE_BUFFER;
527 buffer.pointer = NULL;
528
529 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
530 goto out;
531
532 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
533 goto free_tmp_map;
534
535 cpumask_copy(tmp_map, cpu_present_mask);
536 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
537
538 /*
539 * If mp_register_lapic successfully generates a new logical cpu
540 * number, then the following will get us exactly what was mapped
541 */
542 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
543 if (cpumask_empty(new_map)) {
544 printk ("Unable to map lapic to logical cpu number\n");
545 retval = -EINVAL;
546 goto free_new_map;
547 }
548
549 cpu = cpumask_first(new_map);
550
551 *pcpu = cpu;
552 retval = 0;
553
554 free_new_map:
555 free_cpumask_var(new_map);
556 free_tmp_map:
557 free_cpumask_var(tmp_map);
558 out:
559 return retval;
560 }
561
562 /* wrapper to silence section mismatch warning */
563 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
564 {
565 return _acpi_map_lsapic(handle, pcpu);
566 }
567 EXPORT_SYMBOL(acpi_map_lsapic);
568
569 int acpi_unmap_lsapic(int cpu)
570 {
571 per_cpu(x86_cpu_to_apicid, cpu) = -1;
572 set_cpu_present(cpu, false);
573 num_processors--;
574
575 return (0);
576 }
577
578 EXPORT_SYMBOL(acpi_unmap_lsapic);
579 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
580
581 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
582 {
583 /* TBD */
584 return -EINVAL;
585 }
586
587 EXPORT_SYMBOL(acpi_register_ioapic);
588
589 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
590 {
591 /* TBD */
592 return -EINVAL;
593 }
594
595 EXPORT_SYMBOL(acpi_unregister_ioapic);
596
597 static int __init acpi_parse_sbf(struct acpi_table_header *table)
598 {
599 struct acpi_table_boot *sb;
600
601 sb = (struct acpi_table_boot *)table;
602 if (!sb) {
603 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
604 return -ENODEV;
605 }
606
607 sbf_port = sb->cmos_index; /* Save CMOS port */
608
609 return 0;
610 }
611
612 #ifdef CONFIG_HPET_TIMER
613 #include <asm/hpet.h>
614
615 static struct __initdata resource *hpet_res;
616
617 static int __init acpi_parse_hpet(struct acpi_table_header *table)
618 {
619 struct acpi_table_hpet *hpet_tbl;
620
621 hpet_tbl = (struct acpi_table_hpet *)table;
622 if (!hpet_tbl) {
623 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
624 return -ENODEV;
625 }
626
627 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
628 printk(KERN_WARNING PREFIX "HPET timers must be located in "
629 "memory.\n");
630 return -1;
631 }
632
633 hpet_address = hpet_tbl->address.address;
634
635 /*
636 * Some broken BIOSes advertise HPET at 0x0. We really do not
637 * want to allocate a resource there.
638 */
639 if (!hpet_address) {
640 printk(KERN_WARNING PREFIX
641 "HPET id: %#x base: %#lx is invalid\n",
642 hpet_tbl->id, hpet_address);
643 return 0;
644 }
645 #ifdef CONFIG_X86_64
646 /*
647 * Some even more broken BIOSes advertise HPET at
648 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
649 * some noise:
650 */
651 if (hpet_address == 0xfed0000000000000UL) {
652 if (!hpet_force_user) {
653 printk(KERN_WARNING PREFIX "HPET id: %#x "
654 "base: 0xfed0000000000000 is bogus\n "
655 "try hpet=force on the kernel command line to "
656 "fix it up to 0xfed00000.\n", hpet_tbl->id);
657 hpet_address = 0;
658 return 0;
659 }
660 printk(KERN_WARNING PREFIX
661 "HPET id: %#x base: 0xfed0000000000000 fixed up "
662 "to 0xfed00000.\n", hpet_tbl->id);
663 hpet_address >>= 32;
664 }
665 #endif
666 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
667 hpet_tbl->id, hpet_address);
668
669 /*
670 * Allocate and initialize the HPET firmware resource for adding into
671 * the resource tree during the lateinit timeframe.
672 */
673 #define HPET_RESOURCE_NAME_SIZE 9
674 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
675
676 hpet_res->name = (void *)&hpet_res[1];
677 hpet_res->flags = IORESOURCE_MEM;
678 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
679 hpet_tbl->sequence);
680
681 hpet_res->start = hpet_address;
682 hpet_res->end = hpet_address + (1 * 1024) - 1;
683
684 return 0;
685 }
686
687 /*
688 * hpet_insert_resource inserts the HPET resources used into the resource
689 * tree.
690 */
691 static __init int hpet_insert_resource(void)
692 {
693 if (!hpet_res)
694 return 1;
695
696 return insert_resource(&iomem_resource, hpet_res);
697 }
698
699 late_initcall(hpet_insert_resource);
700
701 #else
702 #define acpi_parse_hpet NULL
703 #endif
704
705 static int __init acpi_parse_fadt(struct acpi_table_header *table)
706 {
707
708 #ifdef CONFIG_X86_PM_TIMER
709 /* detect the location of the ACPI PM Timer */
710 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
711 /* FADT rev. 2 */
712 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
713 ACPI_ADR_SPACE_SYSTEM_IO)
714 return 0;
715
716 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
717 /*
718 * "X" fields are optional extensions to the original V1.0
719 * fields, so we must selectively expand V1.0 fields if the
720 * corresponding X field is zero.
721 */
722 if (!pmtmr_ioport)
723 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
724 } else {
725 /* FADT rev. 1 */
726 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
727 }
728 if (pmtmr_ioport)
729 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
730 pmtmr_ioport);
731 #endif
732 return 0;
733 }
734
735 #ifdef CONFIG_X86_LOCAL_APIC
736 /*
737 * Parse LAPIC entries in MADT
738 * returns 0 on success, < 0 on error
739 */
740
741 static void __init acpi_register_lapic_address(unsigned long address)
742 {
743 mp_lapic_addr = address;
744
745 set_fixmap_nocache(FIX_APIC_BASE, address);
746 if (boot_cpu_physical_apicid == -1U) {
747 boot_cpu_physical_apicid = read_apic_id();
748 apic_version[boot_cpu_physical_apicid] =
749 GET_APIC_VERSION(apic_read(APIC_LVR));
750 }
751 }
752
753 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
754 {
755 int count;
756
757 if (!cpu_has_apic)
758 return -ENODEV;
759
760 /*
761 * Note that the LAPIC address is obtained from the MADT (32-bit value)
762 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
763 */
764
765 count =
766 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
767 acpi_parse_lapic_addr_ovr, 0);
768 if (count < 0) {
769 printk(KERN_ERR PREFIX
770 "Error parsing LAPIC address override entry\n");
771 return count;
772 }
773
774 acpi_register_lapic_address(acpi_lapic_addr);
775
776 return count;
777 }
778
779 static int __init acpi_parse_madt_lapic_entries(void)
780 {
781 int count;
782 int x2count = 0;
783
784 if (!cpu_has_apic)
785 return -ENODEV;
786
787 /*
788 * Note that the LAPIC address is obtained from the MADT (32-bit value)
789 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
790 */
791
792 count =
793 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
794 acpi_parse_lapic_addr_ovr, 0);
795 if (count < 0) {
796 printk(KERN_ERR PREFIX
797 "Error parsing LAPIC address override entry\n");
798 return count;
799 }
800
801 acpi_register_lapic_address(acpi_lapic_addr);
802
803 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
804 acpi_parse_sapic, MAX_APICS);
805
806 if (!count) {
807 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
808 acpi_parse_x2apic, MAX_APICS);
809 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
810 acpi_parse_lapic, MAX_APICS);
811 }
812 if (!count && !x2count) {
813 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
814 /* TBD: Cleanup to allow fallback to MPS */
815 return -ENODEV;
816 } else if (count < 0 || x2count < 0) {
817 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
818 /* TBD: Cleanup to allow fallback to MPS */
819 return count;
820 }
821
822 x2count =
823 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
824 acpi_parse_x2apic_nmi, 0);
825 count =
826 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
827 if (count < 0 || x2count < 0) {
828 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
829 /* TBD: Cleanup to allow fallback to MPS */
830 return count;
831 }
832 return 0;
833 }
834 #endif /* CONFIG_X86_LOCAL_APIC */
835
836 #ifdef CONFIG_X86_IO_APIC
837 #define MP_ISA_BUS 0
838
839 #ifdef CONFIG_X86_ES7000
840 extern int es7000_plat;
841 #endif
842
843 static struct {
844 int gsi_base;
845 int gsi_end;
846 } mp_ioapic_routing[MAX_IO_APICS];
847
848 int mp_find_ioapic(int gsi)
849 {
850 int i = 0;
851
852 /* Find the IOAPIC that manages this GSI. */
853 for (i = 0; i < nr_ioapics; i++) {
854 if ((gsi >= mp_ioapic_routing[i].gsi_base)
855 && (gsi <= mp_ioapic_routing[i].gsi_end))
856 return i;
857 }
858
859 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
860 return -1;
861 }
862
863 int mp_find_ioapic_pin(int ioapic, int gsi)
864 {
865 if (WARN_ON(ioapic == -1))
866 return -1;
867 if (WARN_ON(gsi > mp_ioapic_routing[ioapic].gsi_end))
868 return -1;
869
870 return gsi - mp_ioapic_routing[ioapic].gsi_base;
871 }
872
873 static u8 __init uniq_ioapic_id(u8 id)
874 {
875 #ifdef CONFIG_X86_32
876 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
877 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
878 return io_apic_get_unique_id(nr_ioapics, id);
879 else
880 return id;
881 #else
882 int i;
883 DECLARE_BITMAP(used, 256);
884 bitmap_zero(used, 256);
885 for (i = 0; i < nr_ioapics; i++) {
886 struct mpc_ioapic *ia = &mp_ioapics[i];
887 __set_bit(ia->apicid, used);
888 }
889 if (!test_bit(id, used))
890 return id;
891 return find_first_zero_bit(used, 256);
892 #endif
893 }
894
895 static int bad_ioapic(unsigned long address)
896 {
897 if (nr_ioapics >= MAX_IO_APICS) {
898 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
899 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
900 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
901 }
902 if (!address) {
903 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
904 " found in table, skipping!\n");
905 return 1;
906 }
907 return 0;
908 }
909
910 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
911 {
912 int idx = 0;
913
914 if (bad_ioapic(address))
915 return;
916
917 idx = nr_ioapics;
918
919 mp_ioapics[idx].type = MP_IOAPIC;
920 mp_ioapics[idx].flags = MPC_APIC_USABLE;
921 mp_ioapics[idx].apicaddr = address;
922
923 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
924 mp_ioapics[idx].apicid = uniq_ioapic_id(id);
925 mp_ioapics[idx].apicver = io_apic_get_version(idx);
926
927 /*
928 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
929 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
930 */
931 mp_ioapic_routing[idx].gsi_base = gsi_base;
932 mp_ioapic_routing[idx].gsi_end = gsi_base +
933 io_apic_get_redir_entries(idx);
934
935 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
936 "GSI %d-%d\n", idx, mp_ioapics[idx].apicid,
937 mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr,
938 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
939
940 nr_ioapics++;
941 }
942
943 int __init acpi_probe_gsi(void)
944 {
945 int idx;
946 int gsi;
947 int max_gsi = 0;
948
949 if (acpi_disabled)
950 return 0;
951
952 if (!acpi_ioapic)
953 return 0;
954
955 max_gsi = 0;
956 for (idx = 0; idx < nr_ioapics; idx++) {
957 gsi = mp_ioapic_routing[idx].gsi_end;
958
959 if (gsi > max_gsi)
960 max_gsi = gsi;
961 }
962
963 return max_gsi + 1;
964 }
965
966 static void assign_to_mp_irq(struct mpc_intsrc *m,
967 struct mpc_intsrc *mp_irq)
968 {
969 memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
970 }
971
972 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
973 struct mpc_intsrc *m)
974 {
975 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
976 }
977
978 static void save_mp_irq(struct mpc_intsrc *m)
979 {
980 int i;
981
982 for (i = 0; i < mp_irq_entries; i++) {
983 if (!mp_irq_cmp(&mp_irqs[i], m))
984 return;
985 }
986
987 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
988 if (++mp_irq_entries == MAX_IRQ_SOURCES)
989 panic("Max # of irq sources exceeded!!\n");
990 }
991
992 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
993 {
994 int ioapic;
995 int pin;
996 struct mpc_intsrc mp_irq;
997
998 /*
999 * Convert 'gsi' to 'ioapic.pin'.
1000 */
1001 ioapic = mp_find_ioapic(gsi);
1002 if (ioapic < 0)
1003 return;
1004 pin = mp_find_ioapic_pin(ioapic, gsi);
1005
1006 /*
1007 * TBD: This check is for faulty timer entries, where the override
1008 * erroneously sets the trigger to level, resulting in a HUGE
1009 * increase of timer interrupts!
1010 */
1011 if ((bus_irq == 0) && (trigger == 3))
1012 trigger = 1;
1013
1014 mp_irq.type = MP_INTSRC;
1015 mp_irq.irqtype = mp_INT;
1016 mp_irq.irqflag = (trigger << 2) | polarity;
1017 mp_irq.srcbus = MP_ISA_BUS;
1018 mp_irq.srcbusirq = bus_irq; /* IRQ */
1019 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
1020 mp_irq.dstirq = pin; /* INTIN# */
1021
1022 save_mp_irq(&mp_irq);
1023 }
1024
1025 void __init mp_config_acpi_legacy_irqs(void)
1026 {
1027 int i;
1028 int ioapic;
1029 unsigned int dstapic;
1030 struct mpc_intsrc mp_irq;
1031
1032 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1033 /*
1034 * Fabricate the legacy ISA bus (bus #31).
1035 */
1036 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1037 #endif
1038 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1039 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1040
1041 #ifdef CONFIG_X86_ES7000
1042 /*
1043 * Older generations of ES7000 have no legacy identity mappings
1044 */
1045 if (es7000_plat == 1)
1046 return;
1047 #endif
1048
1049 /*
1050 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1051 */
1052 ioapic = mp_find_ioapic(0);
1053 if (ioapic < 0)
1054 return;
1055 dstapic = mp_ioapics[ioapic].apicid;
1056
1057 /*
1058 * Use the default configuration for the IRQs 0-15. Unless
1059 * overridden by (MADT) interrupt source override entries.
1060 */
1061 for (i = 0; i < 16; i++) {
1062 int idx;
1063
1064 for (idx = 0; idx < mp_irq_entries; idx++) {
1065 struct mpc_intsrc *irq = mp_irqs + idx;
1066
1067 /* Do we already have a mapping for this ISA IRQ? */
1068 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1069 break;
1070
1071 /* Do we already have a mapping for this IOAPIC pin */
1072 if (irq->dstapic == dstapic && irq->dstirq == i)
1073 break;
1074 }
1075
1076 if (idx != mp_irq_entries) {
1077 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1078 continue; /* IRQ already used */
1079 }
1080
1081 mp_irq.type = MP_INTSRC;
1082 mp_irq.irqflag = 0; /* Conforming */
1083 mp_irq.srcbus = MP_ISA_BUS;
1084 mp_irq.dstapic = dstapic;
1085 mp_irq.irqtype = mp_INT;
1086 mp_irq.srcbusirq = i; /* Identity mapped */
1087 mp_irq.dstirq = i;
1088
1089 save_mp_irq(&mp_irq);
1090 }
1091 }
1092
1093 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1094 int polarity)
1095 {
1096 #ifdef CONFIG_X86_MPPARSE
1097 struct mpc_intsrc mp_irq;
1098 struct pci_dev *pdev;
1099 unsigned char number;
1100 unsigned int devfn;
1101 int ioapic;
1102 u8 pin;
1103
1104 if (!acpi_ioapic)
1105 return 0;
1106 if (!dev)
1107 return 0;
1108 if (dev->bus != &pci_bus_type)
1109 return 0;
1110
1111 pdev = to_pci_dev(dev);
1112 number = pdev->bus->number;
1113 devfn = pdev->devfn;
1114 pin = pdev->pin;
1115 /* print the entry should happen on mptable identically */
1116 mp_irq.type = MP_INTSRC;
1117 mp_irq.irqtype = mp_INT;
1118 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1119 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1120 mp_irq.srcbus = number;
1121 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1122 ioapic = mp_find_ioapic(gsi);
1123 mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1124 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1125
1126 save_mp_irq(&mp_irq);
1127 #endif
1128 return 0;
1129 }
1130
1131 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1132 {
1133 int ioapic;
1134 int ioapic_pin;
1135 struct io_apic_irq_attr irq_attr;
1136
1137 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1138 return gsi;
1139
1140 /* Don't set up the ACPI SCI because it's already set up */
1141 if (acpi_gbl_FADT.sci_interrupt == gsi)
1142 return gsi;
1143
1144 ioapic = mp_find_ioapic(gsi);
1145 if (ioapic < 0) {
1146 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1147 return gsi;
1148 }
1149
1150 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1151
1152 #ifdef CONFIG_X86_32
1153 if (ioapic_renumber_irq)
1154 gsi = ioapic_renumber_irq(ioapic, gsi);
1155 #endif
1156
1157 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1158 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1159 "%d-%d\n", mp_ioapics[ioapic].apicid,
1160 ioapic_pin);
1161 return gsi;
1162 }
1163
1164 if (enable_update_mptable)
1165 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1166
1167 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1168 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1169 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1170 io_apic_set_pci_routing(dev, gsi, &irq_attr);
1171
1172 return gsi;
1173 }
1174
1175 /*
1176 * Parse IOAPIC related entries in MADT
1177 * returns 0 on success, < 0 on error
1178 */
1179 static int __init acpi_parse_madt_ioapic_entries(void)
1180 {
1181 int count;
1182
1183 /*
1184 * ACPI interpreter is required to complete interrupt setup,
1185 * so if it is off, don't enumerate the io-apics with ACPI.
1186 * If MPS is present, it will handle them,
1187 * otherwise the system will stay in PIC mode
1188 */
1189 if (acpi_disabled || acpi_noirq) {
1190 return -ENODEV;
1191 }
1192
1193 if (!cpu_has_apic)
1194 return -ENODEV;
1195
1196 /*
1197 * if "noapic" boot option, don't look for IO-APICs
1198 */
1199 if (skip_ioapic_setup) {
1200 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1201 "due to 'noapic' option.\n");
1202 return -ENODEV;
1203 }
1204
1205 count =
1206 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1207 MAX_IO_APICS);
1208 if (!count) {
1209 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1210 return -ENODEV;
1211 } else if (count < 0) {
1212 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1213 return count;
1214 }
1215
1216 count =
1217 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1218 nr_irqs);
1219 if (count < 0) {
1220 printk(KERN_ERR PREFIX
1221 "Error parsing interrupt source overrides entry\n");
1222 /* TBD: Cleanup to allow fallback to MPS */
1223 return count;
1224 }
1225
1226 /*
1227 * If BIOS did not supply an INT_SRC_OVR for the SCI
1228 * pretend we got one so we can set the SCI flags.
1229 */
1230 if (!acpi_sci_override_gsi)
1231 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1232
1233 /* Fill in identity legacy mapings where no override */
1234 mp_config_acpi_legacy_irqs();
1235
1236 count =
1237 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1238 nr_irqs);
1239 if (count < 0) {
1240 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1241 /* TBD: Cleanup to allow fallback to MPS */
1242 return count;
1243 }
1244
1245 return 0;
1246 }
1247 #else
1248 static inline int acpi_parse_madt_ioapic_entries(void)
1249 {
1250 return -1;
1251 }
1252 #endif /* !CONFIG_X86_IO_APIC */
1253
1254 static void __init early_acpi_process_madt(void)
1255 {
1256 #ifdef CONFIG_X86_LOCAL_APIC
1257 int error;
1258
1259 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1260
1261 /*
1262 * Parse MADT LAPIC entries
1263 */
1264 error = early_acpi_parse_madt_lapic_addr_ovr();
1265 if (!error) {
1266 acpi_lapic = 1;
1267 smp_found_config = 1;
1268 }
1269 if (error == -EINVAL) {
1270 /*
1271 * Dell Precision Workstation 410, 610 come here.
1272 */
1273 printk(KERN_ERR PREFIX
1274 "Invalid BIOS MADT, disabling ACPI\n");
1275 disable_acpi();
1276 }
1277 }
1278 #endif
1279 }
1280
1281 static void __init acpi_process_madt(void)
1282 {
1283 #ifdef CONFIG_X86_LOCAL_APIC
1284 int error;
1285
1286 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1287
1288 /*
1289 * Parse MADT LAPIC entries
1290 */
1291 error = acpi_parse_madt_lapic_entries();
1292 if (!error) {
1293 acpi_lapic = 1;
1294
1295 #ifdef CONFIG_X86_BIGSMP
1296 generic_bigsmp_probe();
1297 #endif
1298 /*
1299 * Parse MADT IO-APIC entries
1300 */
1301 error = acpi_parse_madt_ioapic_entries();
1302 if (!error) {
1303 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1304 acpi_ioapic = 1;
1305
1306 smp_found_config = 1;
1307 if (apic->setup_apic_routing)
1308 apic->setup_apic_routing();
1309 }
1310 }
1311 if (error == -EINVAL) {
1312 /*
1313 * Dell Precision Workstation 410, 610 come here.
1314 */
1315 printk(KERN_ERR PREFIX
1316 "Invalid BIOS MADT, disabling ACPI\n");
1317 disable_acpi();
1318 }
1319 } else {
1320 /*
1321 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1322 * In the event an MPS table was found, forget it.
1323 * Boot with "acpi=off" to use MPS on such a system.
1324 */
1325 if (smp_found_config) {
1326 printk(KERN_WARNING PREFIX
1327 "No APIC-table, disabling MPS\n");
1328 smp_found_config = 0;
1329 }
1330 }
1331
1332 /*
1333 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1334 * processors, where MPS only supports physical.
1335 */
1336 if (acpi_lapic && acpi_ioapic)
1337 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1338 "information\n");
1339 else if (acpi_lapic)
1340 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1341 "configuration information\n");
1342 #endif
1343 return;
1344 }
1345
1346 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1347 {
1348 if (!acpi_force) {
1349 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1350 d->ident);
1351 acpi_noirq_set();
1352 }
1353 return 0;
1354 }
1355
1356 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1357 {
1358 if (!acpi_force) {
1359 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1360 d->ident);
1361 acpi_disable_pci();
1362 }
1363 return 0;
1364 }
1365
1366 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1367 {
1368 if (!acpi_force) {
1369 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1370 disable_acpi();
1371 } else {
1372 printk(KERN_NOTICE
1373 "Warning: DMI blacklist says broken, but acpi forced\n");
1374 }
1375 return 0;
1376 }
1377
1378 /*
1379 * Limit ACPI to CPU enumeration for HT
1380 */
1381 static int __init force_acpi_ht(const struct dmi_system_id *d)
1382 {
1383 if (!acpi_force) {
1384 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1385 d->ident);
1386 disable_acpi();
1387 acpi_ht = 1;
1388 } else {
1389 printk(KERN_NOTICE
1390 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1391 }
1392 return 0;
1393 }
1394
1395 /*
1396 * Force ignoring BIOS IRQ0 pin2 override
1397 */
1398 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1399 {
1400 /*
1401 * The ati_ixp4x0_rev() early PCI quirk should have set
1402 * the acpi_skip_timer_override flag already:
1403 */
1404 if (!acpi_skip_timer_override) {
1405 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1406 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1407 d->ident);
1408 acpi_skip_timer_override = 1;
1409 }
1410 return 0;
1411 }
1412
1413 /*
1414 * If your system is blacklisted here, but you find that acpi=force
1415 * works for you, please contact linux-acpi@vger.kernel.org
1416 */
1417 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1418 /*
1419 * Boxes that need ACPI disabled
1420 */
1421 {
1422 .callback = dmi_disable_acpi,
1423 .ident = "IBM Thinkpad",
1424 .matches = {
1425 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1426 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1427 },
1428 },
1429
1430 /*
1431 * Boxes that need acpi=ht
1432 */
1433 {
1434 .callback = force_acpi_ht,
1435 .ident = "FSC Primergy T850",
1436 .matches = {
1437 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1438 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1439 },
1440 },
1441 {
1442 .callback = force_acpi_ht,
1443 .ident = "HP VISUALIZE NT Workstation",
1444 .matches = {
1445 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1446 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1447 },
1448 },
1449 {
1450 .callback = force_acpi_ht,
1451 .ident = "Compaq Workstation W8000",
1452 .matches = {
1453 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1454 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1455 },
1456 },
1457 {
1458 .callback = force_acpi_ht,
1459 .ident = "ASUS P2B-DS",
1460 .matches = {
1461 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1462 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1463 },
1464 },
1465 {
1466 .callback = force_acpi_ht,
1467 .ident = "ASUS CUR-DLS",
1468 .matches = {
1469 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1470 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1471 },
1472 },
1473 {
1474 .callback = force_acpi_ht,
1475 .ident = "ABIT i440BX-W83977",
1476 .matches = {
1477 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1478 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1479 },
1480 },
1481 {
1482 .callback = force_acpi_ht,
1483 .ident = "IBM Bladecenter",
1484 .matches = {
1485 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1486 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1487 },
1488 },
1489 {
1490 .callback = force_acpi_ht,
1491 .ident = "IBM eServer xSeries 360",
1492 .matches = {
1493 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1494 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1495 },
1496 },
1497 {
1498 .callback = force_acpi_ht,
1499 .ident = "IBM eserver xSeries 330",
1500 .matches = {
1501 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1502 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1503 },
1504 },
1505 {
1506 .callback = force_acpi_ht,
1507 .ident = "IBM eserver xSeries 440",
1508 .matches = {
1509 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1510 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1511 },
1512 },
1513
1514 /*
1515 * Boxes that need ACPI PCI IRQ routing disabled
1516 */
1517 {
1518 .callback = disable_acpi_irq,
1519 .ident = "ASUS A7V",
1520 .matches = {
1521 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1522 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1523 /* newer BIOS, Revision 1011, does work */
1524 DMI_MATCH(DMI_BIOS_VERSION,
1525 "ASUS A7V ACPI BIOS Revision 1007"),
1526 },
1527 },
1528 {
1529 /*
1530 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1531 * for LPC bridge, which is needed for the PCI
1532 * interrupt links to work. DSDT fix is in bug 5966.
1533 * 2645, 2646 model numbers are shared with 600/600E/600X
1534 */
1535 .callback = disable_acpi_irq,
1536 .ident = "IBM Thinkpad 600 Series 2645",
1537 .matches = {
1538 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1539 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1540 },
1541 },
1542 {
1543 .callback = disable_acpi_irq,
1544 .ident = "IBM Thinkpad 600 Series 2646",
1545 .matches = {
1546 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1547 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1548 },
1549 },
1550 /*
1551 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1552 */
1553 { /* _BBN 0 bug */
1554 .callback = disable_acpi_pci,
1555 .ident = "ASUS PR-DLS",
1556 .matches = {
1557 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1558 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1559 DMI_MATCH(DMI_BIOS_VERSION,
1560 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1561 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1562 },
1563 },
1564 {
1565 .callback = disable_acpi_pci,
1566 .ident = "Acer TravelMate 36x Laptop",
1567 .matches = {
1568 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1569 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1570 },
1571 },
1572 {}
1573 };
1574
1575 /* second table for DMI checks that should run after early-quirks */
1576 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1577 /*
1578 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1579 * which includes some code which overrides all temperature
1580 * trip points to 16C if the INTIN2 input of the I/O APIC
1581 * is enabled. This input is incorrectly designated the
1582 * ISA IRQ 0 via an interrupt source override even though
1583 * it is wired to the output of the master 8259A and INTIN0
1584 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1585 * override in that cases.
1586 */
1587 {
1588 .callback = dmi_ignore_irq0_timer_override,
1589 .ident = "HP nx6115 laptop",
1590 .matches = {
1591 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1592 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1593 },
1594 },
1595 {
1596 .callback = dmi_ignore_irq0_timer_override,
1597 .ident = "HP NX6125 laptop",
1598 .matches = {
1599 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1600 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1601 },
1602 },
1603 {
1604 .callback = dmi_ignore_irq0_timer_override,
1605 .ident = "HP NX6325 laptop",
1606 .matches = {
1607 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1608 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1609 },
1610 },
1611 {
1612 .callback = dmi_ignore_irq0_timer_override,
1613 .ident = "HP 6715b laptop",
1614 .matches = {
1615 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1616 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1617 },
1618 },
1619 {}
1620 };
1621
1622 /*
1623 * acpi_boot_table_init() and acpi_boot_init()
1624 * called from setup_arch(), always.
1625 * 1. checksums all tables
1626 * 2. enumerates lapics
1627 * 3. enumerates io-apics
1628 *
1629 * acpi_table_init() is separate to allow reading SRAT without
1630 * other side effects.
1631 *
1632 * side effects of acpi_boot_init:
1633 * acpi_lapic = 1 if LAPIC found
1634 * acpi_ioapic = 1 if IOAPIC found
1635 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1636 * if acpi_blacklisted() acpi_disabled = 1;
1637 * acpi_irq_model=...
1638 * ...
1639 *
1640 * return value: (currently ignored)
1641 * 0: success
1642 * !0: failure
1643 */
1644
1645 int __init acpi_boot_table_init(void)
1646 {
1647 int error;
1648
1649 dmi_check_system(acpi_dmi_table);
1650
1651 /*
1652 * If acpi_disabled, bail out
1653 * One exception: acpi=ht continues far enough to enumerate LAPICs
1654 */
1655 if (acpi_disabled && !acpi_ht)
1656 return 1;
1657
1658 /*
1659 * Initialize the ACPI boot-time table parser.
1660 */
1661 error = acpi_table_init();
1662 if (error) {
1663 disable_acpi();
1664 return error;
1665 }
1666
1667 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1668
1669 /*
1670 * blacklist may disable ACPI entirely
1671 */
1672 error = acpi_blacklisted();
1673 if (error) {
1674 if (acpi_force) {
1675 printk(KERN_WARNING PREFIX "acpi=force override\n");
1676 } else {
1677 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1678 disable_acpi();
1679 return error;
1680 }
1681 }
1682
1683 return 0;
1684 }
1685
1686 int __init early_acpi_boot_init(void)
1687 {
1688 /*
1689 * If acpi_disabled, bail out
1690 * One exception: acpi=ht continues far enough to enumerate LAPICs
1691 */
1692 if (acpi_disabled && !acpi_ht)
1693 return 1;
1694
1695 /*
1696 * Process the Multiple APIC Description Table (MADT), if present
1697 */
1698 early_acpi_process_madt();
1699
1700 return 0;
1701 }
1702
1703 int __init acpi_boot_init(void)
1704 {
1705 /* those are executed after early-quirks are executed */
1706 dmi_check_system(acpi_dmi_table_late);
1707
1708 /*
1709 * If acpi_disabled, bail out
1710 * One exception: acpi=ht continues far enough to enumerate LAPICs
1711 */
1712 if (acpi_disabled && !acpi_ht)
1713 return 1;
1714
1715 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1716
1717 /*
1718 * set sci_int and PM timer address
1719 */
1720 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1721
1722 /*
1723 * Process the Multiple APIC Description Table (MADT), if present
1724 */
1725 acpi_process_madt();
1726
1727 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1728
1729 return 0;
1730 }
1731
1732 static int __init parse_acpi(char *arg)
1733 {
1734 if (!arg)
1735 return -EINVAL;
1736
1737 /* "acpi=off" disables both ACPI table parsing and interpreter */
1738 if (strcmp(arg, "off") == 0) {
1739 disable_acpi();
1740 }
1741 /* acpi=force to over-ride black-list */
1742 else if (strcmp(arg, "force") == 0) {
1743 acpi_force = 1;
1744 acpi_ht = 1;
1745 acpi_disabled = 0;
1746 }
1747 /* acpi=strict disables out-of-spec workarounds */
1748 else if (strcmp(arg, "strict") == 0) {
1749 acpi_strict = 1;
1750 }
1751 /* Limit ACPI just to boot-time to enable HT */
1752 else if (strcmp(arg, "ht") == 0) {
1753 if (!acpi_force)
1754 disable_acpi();
1755 acpi_ht = 1;
1756 }
1757 /* acpi=rsdt use RSDT instead of XSDT */
1758 else if (strcmp(arg, "rsdt") == 0) {
1759 acpi_rsdt_forced = 1;
1760 }
1761 /* "acpi=noirq" disables ACPI interrupt routing */
1762 else if (strcmp(arg, "noirq") == 0) {
1763 acpi_noirq_set();
1764 } else {
1765 /* Core will printk when we return error. */
1766 return -EINVAL;
1767 }
1768 return 0;
1769 }
1770 early_param("acpi", parse_acpi);
1771
1772 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1773 static int __init parse_pci(char *arg)
1774 {
1775 if (arg && strcmp(arg, "noacpi") == 0)
1776 acpi_disable_pci();
1777 return 0;
1778 }
1779 early_param("pci", parse_pci);
1780
1781 int __init acpi_mps_check(void)
1782 {
1783 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1784 /* mptable code is not built-in*/
1785 if (acpi_disabled || acpi_noirq) {
1786 printk(KERN_WARNING "MPS support code is not built-in.\n"
1787 "Using acpi=off or acpi=noirq or pci=noacpi "
1788 "may have problem\n");
1789 return 1;
1790 }
1791 #endif
1792 return 0;
1793 }
1794
1795 #ifdef CONFIG_X86_IO_APIC
1796 static int __init parse_acpi_skip_timer_override(char *arg)
1797 {
1798 acpi_skip_timer_override = 1;
1799 return 0;
1800 }
1801 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1802
1803 static int __init parse_acpi_use_timer_override(char *arg)
1804 {
1805 acpi_use_timer_override = 1;
1806 return 0;
1807 }
1808 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1809 #endif /* CONFIG_X86_IO_APIC */
1810
1811 static int __init setup_acpi_sci(char *s)
1812 {
1813 if (!s)
1814 return -EINVAL;
1815 if (!strcmp(s, "edge"))
1816 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1817 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1818 else if (!strcmp(s, "level"))
1819 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1820 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1821 else if (!strcmp(s, "high"))
1822 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1823 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1824 else if (!strcmp(s, "low"))
1825 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1826 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1827 else
1828 return -EINVAL;
1829 return 0;
1830 }
1831 early_param("acpi_sci", setup_acpi_sci);
1832
1833 int __acpi_acquire_global_lock(unsigned int *lock)
1834 {
1835 unsigned int old, new, val;
1836 do {
1837 old = *lock;
1838 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1839 val = cmpxchg(lock, old, new);
1840 } while (unlikely (val != old));
1841 return (new < 3) ? -1 : 0;
1842 }
1843
1844 int __acpi_release_global_lock(unsigned int *lock)
1845 {
1846 unsigned int old, new, val;
1847 do {
1848 old = *lock;
1849 new = old & ~0x3;
1850 val = cmpxchg(lock, old, new);
1851 } while (unlikely (val != old));
1852 return old & 0x1;
1853 }
1854
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