Loading...
1/*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26#include <linux/init.h>
27#include <linux/acpi.h>
28#include <linux/acpi_pmtmr.h>
29#include <linux/efi.h>
30#include <linux/cpumask.h>
31#include <linux/module.h>
32#include <linux/dmi.h>
33#include <linux/irq.h>
34#include <linux/slab.h>
35#include <linux/bootmem.h>
36#include <linux/ioport.h>
37#include <linux/pci.h>
38
39#include <asm/pci_x86.h>
40#include <asm/pgtable.h>
41#include <asm/io_apic.h>
42#include <asm/apic.h>
43#include <asm/io.h>
44#include <asm/mpspec.h>
45#include <asm/smp.h>
46
47static int __initdata acpi_force = 0;
48u32 acpi_rsdt_forced;
49int acpi_disabled;
50EXPORT_SYMBOL(acpi_disabled);
51
52#ifdef CONFIG_X86_64
53# include <asm/proto.h>
54# include <asm/numa_64.h>
55#endif /* X86 */
56
57#define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
60
61#define PREFIX "ACPI: "
62
63int acpi_noirq; /* skip ACPI IRQ initialization */
64int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
65EXPORT_SYMBOL(acpi_pci_disabled);
66
67int acpi_lapic;
68int acpi_ioapic;
69int acpi_strict;
70
71u8 acpi_sci_flags __initdata;
72int acpi_sci_override_gsi __initdata;
73int acpi_skip_timer_override __initdata;
74int acpi_use_timer_override __initdata;
75int acpi_fix_pin2_polarity __initdata;
76
77#ifdef CONFIG_X86_LOCAL_APIC
78static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
79#endif
80
81#ifndef __HAVE_ARCH_CMPXCHG
82#warning ACPI uses CMPXCHG, i486 and later hardware
83#endif
84
85/* --------------------------------------------------------------------------
86 Boot-time Configuration
87 -------------------------------------------------------------------------- */
88
89/*
90 * The default interrupt routing model is PIC (8259). This gets
91 * overridden if IOAPICs are enumerated (below).
92 */
93enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
94
95
96/*
97 * ISA irqs by default are the first 16 gsis but can be
98 * any gsi as specified by an interrupt source override.
99 */
100static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
101 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
102};
103
104static unsigned int gsi_to_irq(unsigned int gsi)
105{
106 unsigned int irq = gsi + NR_IRQS_LEGACY;
107 unsigned int i;
108
109 for (i = 0; i < NR_IRQS_LEGACY; i++) {
110 if (isa_irq_to_gsi[i] == gsi) {
111 return i;
112 }
113 }
114
115 /* Provide an identity mapping of gsi == irq
116 * except on truly weird platforms that have
117 * non isa irqs in the first 16 gsis.
118 */
119 if (gsi >= NR_IRQS_LEGACY)
120 irq = gsi;
121 else
122 irq = gsi_top + gsi;
123
124 return irq;
125}
126
127static u32 irq_to_gsi(int irq)
128{
129 unsigned int gsi;
130
131 if (irq < NR_IRQS_LEGACY)
132 gsi = isa_irq_to_gsi[irq];
133 else if (irq < gsi_top)
134 gsi = irq;
135 else if (irq < (gsi_top + NR_IRQS_LEGACY))
136 gsi = irq - gsi_top;
137 else
138 gsi = 0xffffffff;
139
140 return gsi;
141}
142
143/*
144 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
145 * to map the target physical address. The problem is that set_fixmap()
146 * provides a single page, and it is possible that the page is not
147 * sufficient.
148 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
149 * i.e. until the next __va_range() call.
150 *
151 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
152 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
153 * count idx down while incrementing the phys address.
154 */
155char *__init __acpi_map_table(unsigned long phys, unsigned long size)
156{
157
158 if (!phys || !size)
159 return NULL;
160
161 return early_ioremap(phys, size);
162}
163void __init __acpi_unmap_table(char *map, unsigned long size)
164{
165 if (!map || !size)
166 return;
167
168 early_iounmap(map, size);
169}
170
171#ifdef CONFIG_X86_LOCAL_APIC
172static int __init acpi_parse_madt(struct acpi_table_header *table)
173{
174 struct acpi_table_madt *madt = NULL;
175
176 if (!cpu_has_apic)
177 return -EINVAL;
178
179 madt = (struct acpi_table_madt *)table;
180 if (!madt) {
181 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
182 return -ENODEV;
183 }
184
185 if (madt->address) {
186 acpi_lapic_addr = (u64) madt->address;
187
188 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
189 madt->address);
190 }
191
192 default_acpi_madt_oem_check(madt->header.oem_id,
193 madt->header.oem_table_id);
194
195 return 0;
196}
197
198static void __cpuinit acpi_register_lapic(int id, u8 enabled)
199{
200 unsigned int ver = 0;
201
202 if (id >= (MAX_LOCAL_APIC-1)) {
203 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
204 return;
205 }
206
207 if (!enabled) {
208 ++disabled_cpus;
209 return;
210 }
211
212 if (boot_cpu_physical_apicid != -1U)
213 ver = apic_version[boot_cpu_physical_apicid];
214
215 generic_processor_info(id, ver);
216}
217
218static int __init
219acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
220{
221 struct acpi_madt_local_x2apic *processor = NULL;
222 int apic_id;
223 u8 enabled;
224
225 processor = (struct acpi_madt_local_x2apic *)header;
226
227 if (BAD_MADT_ENTRY(processor, end))
228 return -EINVAL;
229
230 acpi_table_print_madt_entry(header);
231
232 apic_id = processor->local_apic_id;
233 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
234#ifdef CONFIG_X86_X2APIC
235 /*
236 * We need to register disabled CPU as well to permit
237 * counting disabled CPUs. This allows us to size
238 * cpus_possible_map more accurately, to permit
239 * to not preallocating memory for all NR_CPUS
240 * when we use CPU hotplug.
241 */
242 if (!apic->apic_id_valid(apic_id) && enabled)
243 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
244 else
245 acpi_register_lapic(apic_id, enabled);
246#else
247 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
248#endif
249
250 return 0;
251}
252
253static int __init
254acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
255{
256 struct acpi_madt_local_apic *processor = NULL;
257
258 processor = (struct acpi_madt_local_apic *)header;
259
260 if (BAD_MADT_ENTRY(processor, end))
261 return -EINVAL;
262
263 acpi_table_print_madt_entry(header);
264
265 /*
266 * We need to register disabled CPU as well to permit
267 * counting disabled CPUs. This allows us to size
268 * cpus_possible_map more accurately, to permit
269 * to not preallocating memory for all NR_CPUS
270 * when we use CPU hotplug.
271 */
272 acpi_register_lapic(processor->id, /* APIC ID */
273 processor->lapic_flags & ACPI_MADT_ENABLED);
274
275 return 0;
276}
277
278static int __init
279acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
280{
281 struct acpi_madt_local_sapic *processor = NULL;
282
283 processor = (struct acpi_madt_local_sapic *)header;
284
285 if (BAD_MADT_ENTRY(processor, end))
286 return -EINVAL;
287
288 acpi_table_print_madt_entry(header);
289
290 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
291 processor->lapic_flags & ACPI_MADT_ENABLED);
292
293 return 0;
294}
295
296static int __init
297acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
298 const unsigned long end)
299{
300 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
301
302 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
303
304 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
305 return -EINVAL;
306
307 acpi_lapic_addr = lapic_addr_ovr->address;
308
309 return 0;
310}
311
312static int __init
313acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
314 const unsigned long end)
315{
316 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
317
318 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
319
320 if (BAD_MADT_ENTRY(x2apic_nmi, end))
321 return -EINVAL;
322
323 acpi_table_print_madt_entry(header);
324
325 if (x2apic_nmi->lint != 1)
326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
327
328 return 0;
329}
330
331static int __init
332acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
333{
334 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
335
336 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
337
338 if (BAD_MADT_ENTRY(lapic_nmi, end))
339 return -EINVAL;
340
341 acpi_table_print_madt_entry(header);
342
343 if (lapic_nmi->lint != 1)
344 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
345
346 return 0;
347}
348
349#endif /*CONFIG_X86_LOCAL_APIC */
350
351#ifdef CONFIG_X86_IO_APIC
352
353static int __init
354acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
355{
356 struct acpi_madt_io_apic *ioapic = NULL;
357
358 ioapic = (struct acpi_madt_io_apic *)header;
359
360 if (BAD_MADT_ENTRY(ioapic, end))
361 return -EINVAL;
362
363 acpi_table_print_madt_entry(header);
364
365 mp_register_ioapic(ioapic->id,
366 ioapic->address, ioapic->global_irq_base);
367
368 return 0;
369}
370
371/*
372 * Parse Interrupt Source Override for the ACPI SCI
373 */
374static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
375{
376 if (trigger == 0) /* compatible SCI trigger is level */
377 trigger = 3;
378
379 if (polarity == 0) /* compatible SCI polarity is low */
380 polarity = 3;
381
382 /* Command-line over-ride via acpi_sci= */
383 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
384 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
385
386 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
387 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
388
389 /*
390 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
391 * If GSI is < 16, this will update its flags,
392 * else it will create a new mp_irqs[] entry.
393 */
394 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
395
396 /*
397 * stash over-ride to indicate we've been here
398 * and for later update of acpi_gbl_FADT
399 */
400 acpi_sci_override_gsi = gsi;
401 return;
402}
403
404static int __init
405acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
406 const unsigned long end)
407{
408 struct acpi_madt_interrupt_override *intsrc = NULL;
409
410 intsrc = (struct acpi_madt_interrupt_override *)header;
411
412 if (BAD_MADT_ENTRY(intsrc, end))
413 return -EINVAL;
414
415 acpi_table_print_madt_entry(header);
416
417 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
418 acpi_sci_ioapic_setup(intsrc->source_irq,
419 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
420 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
421 intsrc->global_irq);
422 return 0;
423 }
424
425 if (intsrc->source_irq == 0) {
426 if (acpi_skip_timer_override) {
427 printk(PREFIX "BIOS IRQ0 override ignored.\n");
428 return 0;
429 }
430
431 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
432 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
433 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
434 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
435 }
436 }
437
438 mp_override_legacy_irq(intsrc->source_irq,
439 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
440 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
441 intsrc->global_irq);
442
443 return 0;
444}
445
446static int __init
447acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
448{
449 struct acpi_madt_nmi_source *nmi_src = NULL;
450
451 nmi_src = (struct acpi_madt_nmi_source *)header;
452
453 if (BAD_MADT_ENTRY(nmi_src, end))
454 return -EINVAL;
455
456 acpi_table_print_madt_entry(header);
457
458 /* TBD: Support nimsrc entries? */
459
460 return 0;
461}
462
463#endif /* CONFIG_X86_IO_APIC */
464
465/*
466 * acpi_pic_sci_set_trigger()
467 *
468 * use ELCR to set PIC-mode trigger type for SCI
469 *
470 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
471 * it may require Edge Trigger -- use "acpi_sci=edge"
472 *
473 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
474 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
475 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
476 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
477 */
478
479void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
480{
481 unsigned int mask = 1 << irq;
482 unsigned int old, new;
483
484 /* Real old ELCR mask */
485 old = inb(0x4d0) | (inb(0x4d1) << 8);
486
487 /*
488 * If we use ACPI to set PCI IRQs, then we should clear ELCR
489 * since we will set it correctly as we enable the PCI irq
490 * routing.
491 */
492 new = acpi_noirq ? old : 0;
493
494 /*
495 * Update SCI information in the ELCR, it isn't in the PCI
496 * routing tables..
497 */
498 switch (trigger) {
499 case 1: /* Edge - clear */
500 new &= ~mask;
501 break;
502 case 3: /* Level - set */
503 new |= mask;
504 break;
505 }
506
507 if (old == new)
508 return;
509
510 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
511 outb(new, 0x4d0);
512 outb(new >> 8, 0x4d1);
513}
514
515int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
516{
517 *irq = gsi_to_irq(gsi);
518
519#ifdef CONFIG_X86_IO_APIC
520 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
521 setup_IO_APIC_irq_extra(gsi);
522#endif
523
524 return 0;
525}
526EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
527
528int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
529{
530 if (isa_irq >= 16)
531 return -1;
532 *gsi = irq_to_gsi(isa_irq);
533 return 0;
534}
535
536static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
537 int trigger, int polarity)
538{
539#ifdef CONFIG_PCI
540 /*
541 * Make sure all (legacy) PCI IRQs are set as level-triggered.
542 */
543 if (trigger == ACPI_LEVEL_SENSITIVE)
544 eisa_set_level_irq(gsi);
545#endif
546
547 return gsi;
548}
549
550static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
551 int trigger, int polarity)
552{
553#ifdef CONFIG_X86_IO_APIC
554 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
555#endif
556
557 return gsi;
558}
559
560int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
561 int trigger, int polarity) = acpi_register_gsi_pic;
562
563/*
564 * success: return IRQ number (>=0)
565 * failure: return < 0
566 */
567int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
568{
569 unsigned int irq;
570 unsigned int plat_gsi = gsi;
571
572 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
573 irq = gsi_to_irq(plat_gsi);
574
575 return irq;
576}
577
578void __init acpi_set_irq_model_pic(void)
579{
580 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
581 __acpi_register_gsi = acpi_register_gsi_pic;
582 acpi_ioapic = 0;
583}
584
585void __init acpi_set_irq_model_ioapic(void)
586{
587 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
588 __acpi_register_gsi = acpi_register_gsi_ioapic;
589 acpi_ioapic = 1;
590}
591
592/*
593 * ACPI based hotplug support for CPU
594 */
595#ifdef CONFIG_ACPI_HOTPLUG_CPU
596#include <acpi/processor.h>
597
598static void __cpuinit acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
599{
600#ifdef CONFIG_ACPI_NUMA
601 int nid;
602
603 nid = acpi_get_node(handle);
604 if (nid == -1 || !node_online(nid))
605 return;
606 set_apicid_to_node(physid, nid);
607 numa_set_node(cpu, nid);
608#endif
609}
610
611static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
612{
613 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
614 union acpi_object *obj;
615 struct acpi_madt_local_apic *lapic;
616 cpumask_var_t tmp_map, new_map;
617 u8 physid;
618 int cpu;
619 int retval = -ENOMEM;
620
621 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
622 return -EINVAL;
623
624 if (!buffer.length || !buffer.pointer)
625 return -EINVAL;
626
627 obj = buffer.pointer;
628 if (obj->type != ACPI_TYPE_BUFFER ||
629 obj->buffer.length < sizeof(*lapic)) {
630 kfree(buffer.pointer);
631 return -EINVAL;
632 }
633
634 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
635
636 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
637 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
638 kfree(buffer.pointer);
639 return -EINVAL;
640 }
641
642 physid = lapic->id;
643
644 kfree(buffer.pointer);
645 buffer.length = ACPI_ALLOCATE_BUFFER;
646 buffer.pointer = NULL;
647 lapic = NULL;
648
649 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
650 goto out;
651
652 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
653 goto free_tmp_map;
654
655 cpumask_copy(tmp_map, cpu_present_mask);
656 acpi_register_lapic(physid, ACPI_MADT_ENABLED);
657
658 /*
659 * If mp_register_lapic successfully generates a new logical cpu
660 * number, then the following will get us exactly what was mapped
661 */
662 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
663 if (cpumask_empty(new_map)) {
664 printk ("Unable to map lapic to logical cpu number\n");
665 retval = -EINVAL;
666 goto free_new_map;
667 }
668
669 acpi_processor_set_pdc(handle);
670
671 cpu = cpumask_first(new_map);
672 acpi_map_cpu2node(handle, cpu, physid);
673
674 *pcpu = cpu;
675 retval = 0;
676
677free_new_map:
678 free_cpumask_var(new_map);
679free_tmp_map:
680 free_cpumask_var(tmp_map);
681out:
682 return retval;
683}
684
685/* wrapper to silence section mismatch warning */
686int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
687{
688 return _acpi_map_lsapic(handle, pcpu);
689}
690EXPORT_SYMBOL(acpi_map_lsapic);
691
692int acpi_unmap_lsapic(int cpu)
693{
694 per_cpu(x86_cpu_to_apicid, cpu) = -1;
695 set_cpu_present(cpu, false);
696 num_processors--;
697
698 return (0);
699}
700
701EXPORT_SYMBOL(acpi_unmap_lsapic);
702#endif /* CONFIG_ACPI_HOTPLUG_CPU */
703
704int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
705{
706 /* TBD */
707 return -EINVAL;
708}
709
710EXPORT_SYMBOL(acpi_register_ioapic);
711
712int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
713{
714 /* TBD */
715 return -EINVAL;
716}
717
718EXPORT_SYMBOL(acpi_unregister_ioapic);
719
720static int __init acpi_parse_sbf(struct acpi_table_header *table)
721{
722 struct acpi_table_boot *sb;
723
724 sb = (struct acpi_table_boot *)table;
725 if (!sb) {
726 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
727 return -ENODEV;
728 }
729
730 sbf_port = sb->cmos_index; /* Save CMOS port */
731
732 return 0;
733}
734
735#ifdef CONFIG_HPET_TIMER
736#include <asm/hpet.h>
737
738static struct __initdata resource *hpet_res;
739
740static int __init acpi_parse_hpet(struct acpi_table_header *table)
741{
742 struct acpi_table_hpet *hpet_tbl;
743
744 hpet_tbl = (struct acpi_table_hpet *)table;
745 if (!hpet_tbl) {
746 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
747 return -ENODEV;
748 }
749
750 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
751 printk(KERN_WARNING PREFIX "HPET timers must be located in "
752 "memory.\n");
753 return -1;
754 }
755
756 hpet_address = hpet_tbl->address.address;
757 hpet_blockid = hpet_tbl->sequence;
758
759 /*
760 * Some broken BIOSes advertise HPET at 0x0. We really do not
761 * want to allocate a resource there.
762 */
763 if (!hpet_address) {
764 printk(KERN_WARNING PREFIX
765 "HPET id: %#x base: %#lx is invalid\n",
766 hpet_tbl->id, hpet_address);
767 return 0;
768 }
769#ifdef CONFIG_X86_64
770 /*
771 * Some even more broken BIOSes advertise HPET at
772 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
773 * some noise:
774 */
775 if (hpet_address == 0xfed0000000000000UL) {
776 if (!hpet_force_user) {
777 printk(KERN_WARNING PREFIX "HPET id: %#x "
778 "base: 0xfed0000000000000 is bogus\n "
779 "try hpet=force on the kernel command line to "
780 "fix it up to 0xfed00000.\n", hpet_tbl->id);
781 hpet_address = 0;
782 return 0;
783 }
784 printk(KERN_WARNING PREFIX
785 "HPET id: %#x base: 0xfed0000000000000 fixed up "
786 "to 0xfed00000.\n", hpet_tbl->id);
787 hpet_address >>= 32;
788 }
789#endif
790 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
791 hpet_tbl->id, hpet_address);
792
793 /*
794 * Allocate and initialize the HPET firmware resource for adding into
795 * the resource tree during the lateinit timeframe.
796 */
797#define HPET_RESOURCE_NAME_SIZE 9
798 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
799
800 hpet_res->name = (void *)&hpet_res[1];
801 hpet_res->flags = IORESOURCE_MEM;
802 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
803 hpet_tbl->sequence);
804
805 hpet_res->start = hpet_address;
806 hpet_res->end = hpet_address + (1 * 1024) - 1;
807
808 return 0;
809}
810
811/*
812 * hpet_insert_resource inserts the HPET resources used into the resource
813 * tree.
814 */
815static __init int hpet_insert_resource(void)
816{
817 if (!hpet_res)
818 return 1;
819
820 return insert_resource(&iomem_resource, hpet_res);
821}
822
823late_initcall(hpet_insert_resource);
824
825#else
826#define acpi_parse_hpet NULL
827#endif
828
829static int __init acpi_parse_fadt(struct acpi_table_header *table)
830{
831
832#ifdef CONFIG_X86_PM_TIMER
833 /* detect the location of the ACPI PM Timer */
834 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
835 /* FADT rev. 2 */
836 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
837 ACPI_ADR_SPACE_SYSTEM_IO)
838 return 0;
839
840 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
841 /*
842 * "X" fields are optional extensions to the original V1.0
843 * fields, so we must selectively expand V1.0 fields if the
844 * corresponding X field is zero.
845 */
846 if (!pmtmr_ioport)
847 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
848 } else {
849 /* FADT rev. 1 */
850 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
851 }
852 if (pmtmr_ioport)
853 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
854 pmtmr_ioport);
855#endif
856 return 0;
857}
858
859#ifdef CONFIG_X86_LOCAL_APIC
860/*
861 * Parse LAPIC entries in MADT
862 * returns 0 on success, < 0 on error
863 */
864
865static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
866{
867 int count;
868
869 if (!cpu_has_apic)
870 return -ENODEV;
871
872 /*
873 * Note that the LAPIC address is obtained from the MADT (32-bit value)
874 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
875 */
876
877 count =
878 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
879 acpi_parse_lapic_addr_ovr, 0);
880 if (count < 0) {
881 printk(KERN_ERR PREFIX
882 "Error parsing LAPIC address override entry\n");
883 return count;
884 }
885
886 register_lapic_address(acpi_lapic_addr);
887
888 return count;
889}
890
891static int __init acpi_parse_madt_lapic_entries(void)
892{
893 int count;
894 int x2count = 0;
895
896 if (!cpu_has_apic)
897 return -ENODEV;
898
899 /*
900 * Note that the LAPIC address is obtained from the MADT (32-bit value)
901 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
902 */
903
904 count =
905 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
906 acpi_parse_lapic_addr_ovr, 0);
907 if (count < 0) {
908 printk(KERN_ERR PREFIX
909 "Error parsing LAPIC address override entry\n");
910 return count;
911 }
912
913 register_lapic_address(acpi_lapic_addr);
914
915 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
916 acpi_parse_sapic, MAX_LOCAL_APIC);
917
918 if (!count) {
919 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
920 acpi_parse_x2apic, MAX_LOCAL_APIC);
921 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
922 acpi_parse_lapic, MAX_LOCAL_APIC);
923 }
924 if (!count && !x2count) {
925 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
926 /* TBD: Cleanup to allow fallback to MPS */
927 return -ENODEV;
928 } else if (count < 0 || x2count < 0) {
929 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
930 /* TBD: Cleanup to allow fallback to MPS */
931 return count;
932 }
933
934 x2count =
935 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
936 acpi_parse_x2apic_nmi, 0);
937 count =
938 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
939 if (count < 0 || x2count < 0) {
940 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
941 /* TBD: Cleanup to allow fallback to MPS */
942 return count;
943 }
944 return 0;
945}
946#endif /* CONFIG_X86_LOCAL_APIC */
947
948#ifdef CONFIG_X86_IO_APIC
949#define MP_ISA_BUS 0
950
951#ifdef CONFIG_X86_ES7000
952extern int es7000_plat;
953#endif
954
955void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
956{
957 int ioapic;
958 int pin;
959 struct mpc_intsrc mp_irq;
960
961 /*
962 * Convert 'gsi' to 'ioapic.pin'.
963 */
964 ioapic = mp_find_ioapic(gsi);
965 if (ioapic < 0)
966 return;
967 pin = mp_find_ioapic_pin(ioapic, gsi);
968
969 /*
970 * TBD: This check is for faulty timer entries, where the override
971 * erroneously sets the trigger to level, resulting in a HUGE
972 * increase of timer interrupts!
973 */
974 if ((bus_irq == 0) && (trigger == 3))
975 trigger = 1;
976
977 mp_irq.type = MP_INTSRC;
978 mp_irq.irqtype = mp_INT;
979 mp_irq.irqflag = (trigger << 2) | polarity;
980 mp_irq.srcbus = MP_ISA_BUS;
981 mp_irq.srcbusirq = bus_irq; /* IRQ */
982 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
983 mp_irq.dstirq = pin; /* INTIN# */
984
985 mp_save_irq(&mp_irq);
986
987 isa_irq_to_gsi[bus_irq] = gsi;
988}
989
990void __init mp_config_acpi_legacy_irqs(void)
991{
992 int i;
993 struct mpc_intsrc mp_irq;
994
995#ifdef CONFIG_EISA
996 /*
997 * Fabricate the legacy ISA bus (bus #31).
998 */
999 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1000#endif
1001 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1002 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1003
1004#ifdef CONFIG_X86_ES7000
1005 /*
1006 * Older generations of ES7000 have no legacy identity mappings
1007 */
1008 if (es7000_plat == 1)
1009 return;
1010#endif
1011
1012 /*
1013 * Use the default configuration for the IRQs 0-15. Unless
1014 * overridden by (MADT) interrupt source override entries.
1015 */
1016 for (i = 0; i < 16; i++) {
1017 int ioapic, pin;
1018 unsigned int dstapic;
1019 int idx;
1020 u32 gsi;
1021
1022 /* Locate the gsi that irq i maps to. */
1023 if (acpi_isa_irq_to_gsi(i, &gsi))
1024 continue;
1025
1026 /*
1027 * Locate the IOAPIC that manages the ISA IRQ.
1028 */
1029 ioapic = mp_find_ioapic(gsi);
1030 if (ioapic < 0)
1031 continue;
1032 pin = mp_find_ioapic_pin(ioapic, gsi);
1033 dstapic = mpc_ioapic_id(ioapic);
1034
1035 for (idx = 0; idx < mp_irq_entries; idx++) {
1036 struct mpc_intsrc *irq = mp_irqs + idx;
1037
1038 /* Do we already have a mapping for this ISA IRQ? */
1039 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1040 break;
1041
1042 /* Do we already have a mapping for this IOAPIC pin */
1043 if (irq->dstapic == dstapic && irq->dstirq == pin)
1044 break;
1045 }
1046
1047 if (idx != mp_irq_entries) {
1048 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1049 continue; /* IRQ already used */
1050 }
1051
1052 mp_irq.type = MP_INTSRC;
1053 mp_irq.irqflag = 0; /* Conforming */
1054 mp_irq.srcbus = MP_ISA_BUS;
1055 mp_irq.dstapic = dstapic;
1056 mp_irq.irqtype = mp_INT;
1057 mp_irq.srcbusirq = i; /* Identity mapped */
1058 mp_irq.dstirq = pin;
1059
1060 mp_save_irq(&mp_irq);
1061 }
1062}
1063
1064static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1065 int polarity)
1066{
1067#ifdef CONFIG_X86_MPPARSE
1068 struct mpc_intsrc mp_irq;
1069 struct pci_dev *pdev;
1070 unsigned char number;
1071 unsigned int devfn;
1072 int ioapic;
1073 u8 pin;
1074
1075 if (!acpi_ioapic)
1076 return 0;
1077 if (!dev)
1078 return 0;
1079 if (dev->bus != &pci_bus_type)
1080 return 0;
1081
1082 pdev = to_pci_dev(dev);
1083 number = pdev->bus->number;
1084 devfn = pdev->devfn;
1085 pin = pdev->pin;
1086 /* print the entry should happen on mptable identically */
1087 mp_irq.type = MP_INTSRC;
1088 mp_irq.irqtype = mp_INT;
1089 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1090 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1091 mp_irq.srcbus = number;
1092 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1093 ioapic = mp_find_ioapic(gsi);
1094 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1095 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1096
1097 mp_save_irq(&mp_irq);
1098#endif
1099 return 0;
1100}
1101
1102int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1103{
1104 int ioapic;
1105 int ioapic_pin;
1106 struct io_apic_irq_attr irq_attr;
1107
1108 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1109 return gsi;
1110
1111 /* Don't set up the ACPI SCI because it's already set up */
1112 if (acpi_gbl_FADT.sci_interrupt == gsi)
1113 return gsi;
1114
1115 ioapic = mp_find_ioapic(gsi);
1116 if (ioapic < 0) {
1117 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1118 return gsi;
1119 }
1120
1121 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1122
1123 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1124 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1125 "%d-%d\n", mpc_ioapic_id(ioapic),
1126 ioapic_pin);
1127 return gsi;
1128 }
1129
1130 if (enable_update_mptable)
1131 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1132
1133 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1134 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1135 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1136 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1137
1138 return gsi;
1139}
1140
1141/*
1142 * Parse IOAPIC related entries in MADT
1143 * returns 0 on success, < 0 on error
1144 */
1145static int __init acpi_parse_madt_ioapic_entries(void)
1146{
1147 int count;
1148
1149 /*
1150 * ACPI interpreter is required to complete interrupt setup,
1151 * so if it is off, don't enumerate the io-apics with ACPI.
1152 * If MPS is present, it will handle them,
1153 * otherwise the system will stay in PIC mode
1154 */
1155 if (acpi_disabled || acpi_noirq)
1156 return -ENODEV;
1157
1158 if (!cpu_has_apic)
1159 return -ENODEV;
1160
1161 /*
1162 * if "noapic" boot option, don't look for IO-APICs
1163 */
1164 if (skip_ioapic_setup) {
1165 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1166 "due to 'noapic' option.\n");
1167 return -ENODEV;
1168 }
1169
1170 count =
1171 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1172 MAX_IO_APICS);
1173 if (!count) {
1174 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1175 return -ENODEV;
1176 } else if (count < 0) {
1177 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1178 return count;
1179 }
1180
1181 count =
1182 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1183 nr_irqs);
1184 if (count < 0) {
1185 printk(KERN_ERR PREFIX
1186 "Error parsing interrupt source overrides entry\n");
1187 /* TBD: Cleanup to allow fallback to MPS */
1188 return count;
1189 }
1190
1191 /*
1192 * If BIOS did not supply an INT_SRC_OVR for the SCI
1193 * pretend we got one so we can set the SCI flags.
1194 */
1195 if (!acpi_sci_override_gsi)
1196 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1197 acpi_gbl_FADT.sci_interrupt);
1198
1199 /* Fill in identity legacy mappings where no override */
1200 mp_config_acpi_legacy_irqs();
1201
1202 count =
1203 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1204 nr_irqs);
1205 if (count < 0) {
1206 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1207 /* TBD: Cleanup to allow fallback to MPS */
1208 return count;
1209 }
1210
1211 return 0;
1212}
1213#else
1214static inline int acpi_parse_madt_ioapic_entries(void)
1215{
1216 return -1;
1217}
1218#endif /* !CONFIG_X86_IO_APIC */
1219
1220static void __init early_acpi_process_madt(void)
1221{
1222#ifdef CONFIG_X86_LOCAL_APIC
1223 int error;
1224
1225 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1226
1227 /*
1228 * Parse MADT LAPIC entries
1229 */
1230 error = early_acpi_parse_madt_lapic_addr_ovr();
1231 if (!error) {
1232 acpi_lapic = 1;
1233 smp_found_config = 1;
1234 }
1235 if (error == -EINVAL) {
1236 /*
1237 * Dell Precision Workstation 410, 610 come here.
1238 */
1239 printk(KERN_ERR PREFIX
1240 "Invalid BIOS MADT, disabling ACPI\n");
1241 disable_acpi();
1242 }
1243 }
1244#endif
1245}
1246
1247static void __init acpi_process_madt(void)
1248{
1249#ifdef CONFIG_X86_LOCAL_APIC
1250 int error;
1251
1252 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1253
1254 /*
1255 * Parse MADT LAPIC entries
1256 */
1257 error = acpi_parse_madt_lapic_entries();
1258 if (!error) {
1259 acpi_lapic = 1;
1260
1261 /*
1262 * Parse MADT IO-APIC entries
1263 */
1264 error = acpi_parse_madt_ioapic_entries();
1265 if (!error) {
1266 acpi_set_irq_model_ioapic();
1267
1268 smp_found_config = 1;
1269 }
1270 }
1271 if (error == -EINVAL) {
1272 /*
1273 * Dell Precision Workstation 410, 610 come here.
1274 */
1275 printk(KERN_ERR PREFIX
1276 "Invalid BIOS MADT, disabling ACPI\n");
1277 disable_acpi();
1278 }
1279 } else {
1280 /*
1281 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1282 * In the event an MPS table was found, forget it.
1283 * Boot with "acpi=off" to use MPS on such a system.
1284 */
1285 if (smp_found_config) {
1286 printk(KERN_WARNING PREFIX
1287 "No APIC-table, disabling MPS\n");
1288 smp_found_config = 0;
1289 }
1290 }
1291
1292 /*
1293 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1294 * processors, where MPS only supports physical.
1295 */
1296 if (acpi_lapic && acpi_ioapic)
1297 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1298 "information\n");
1299 else if (acpi_lapic)
1300 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1301 "configuration information\n");
1302#endif
1303 return;
1304}
1305
1306static int __init disable_acpi_irq(const struct dmi_system_id *d)
1307{
1308 if (!acpi_force) {
1309 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1310 d->ident);
1311 acpi_noirq_set();
1312 }
1313 return 0;
1314}
1315
1316static int __init disable_acpi_pci(const struct dmi_system_id *d)
1317{
1318 if (!acpi_force) {
1319 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1320 d->ident);
1321 acpi_disable_pci();
1322 }
1323 return 0;
1324}
1325
1326static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1327{
1328 if (!acpi_force) {
1329 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1330 disable_acpi();
1331 } else {
1332 printk(KERN_NOTICE
1333 "Warning: DMI blacklist says broken, but acpi forced\n");
1334 }
1335 return 0;
1336}
1337
1338/*
1339 * Force ignoring BIOS IRQ0 override
1340 */
1341static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1342{
1343 if (!acpi_skip_timer_override) {
1344 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1345 d->ident);
1346 acpi_skip_timer_override = 1;
1347 }
1348 return 0;
1349}
1350
1351/*
1352 * If your system is blacklisted here, but you find that acpi=force
1353 * works for you, please contact linux-acpi@vger.kernel.org
1354 */
1355static struct dmi_system_id __initdata acpi_dmi_table[] = {
1356 /*
1357 * Boxes that need ACPI disabled
1358 */
1359 {
1360 .callback = dmi_disable_acpi,
1361 .ident = "IBM Thinkpad",
1362 .matches = {
1363 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1364 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1365 },
1366 },
1367
1368 /*
1369 * Boxes that need ACPI PCI IRQ routing disabled
1370 */
1371 {
1372 .callback = disable_acpi_irq,
1373 .ident = "ASUS A7V",
1374 .matches = {
1375 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1376 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1377 /* newer BIOS, Revision 1011, does work */
1378 DMI_MATCH(DMI_BIOS_VERSION,
1379 "ASUS A7V ACPI BIOS Revision 1007"),
1380 },
1381 },
1382 {
1383 /*
1384 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1385 * for LPC bridge, which is needed for the PCI
1386 * interrupt links to work. DSDT fix is in bug 5966.
1387 * 2645, 2646 model numbers are shared with 600/600E/600X
1388 */
1389 .callback = disable_acpi_irq,
1390 .ident = "IBM Thinkpad 600 Series 2645",
1391 .matches = {
1392 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1393 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1394 },
1395 },
1396 {
1397 .callback = disable_acpi_irq,
1398 .ident = "IBM Thinkpad 600 Series 2646",
1399 .matches = {
1400 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1401 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1402 },
1403 },
1404 /*
1405 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1406 */
1407 { /* _BBN 0 bug */
1408 .callback = disable_acpi_pci,
1409 .ident = "ASUS PR-DLS",
1410 .matches = {
1411 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1412 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1413 DMI_MATCH(DMI_BIOS_VERSION,
1414 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1415 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1416 },
1417 },
1418 {
1419 .callback = disable_acpi_pci,
1420 .ident = "Acer TravelMate 36x Laptop",
1421 .matches = {
1422 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1423 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1424 },
1425 },
1426 {}
1427};
1428
1429/* second table for DMI checks that should run after early-quirks */
1430static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1431 /*
1432 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1433 * which includes some code which overrides all temperature
1434 * trip points to 16C if the INTIN2 input of the I/O APIC
1435 * is enabled. This input is incorrectly designated the
1436 * ISA IRQ 0 via an interrupt source override even though
1437 * it is wired to the output of the master 8259A and INTIN0
1438 * is not connected at all. Force ignoring BIOS IRQ0
1439 * override in that cases.
1440 */
1441 {
1442 .callback = dmi_ignore_irq0_timer_override,
1443 .ident = "HP nx6115 laptop",
1444 .matches = {
1445 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1446 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1447 },
1448 },
1449 {
1450 .callback = dmi_ignore_irq0_timer_override,
1451 .ident = "HP NX6125 laptop",
1452 .matches = {
1453 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1454 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1455 },
1456 },
1457 {
1458 .callback = dmi_ignore_irq0_timer_override,
1459 .ident = "HP NX6325 laptop",
1460 .matches = {
1461 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1462 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1463 },
1464 },
1465 {
1466 .callback = dmi_ignore_irq0_timer_override,
1467 .ident = "HP 6715b laptop",
1468 .matches = {
1469 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1470 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1471 },
1472 },
1473 {
1474 .callback = dmi_ignore_irq0_timer_override,
1475 .ident = "FUJITSU SIEMENS",
1476 .matches = {
1477 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1478 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1479 },
1480 },
1481 {}
1482};
1483
1484/*
1485 * acpi_boot_table_init() and acpi_boot_init()
1486 * called from setup_arch(), always.
1487 * 1. checksums all tables
1488 * 2. enumerates lapics
1489 * 3. enumerates io-apics
1490 *
1491 * acpi_table_init() is separate to allow reading SRAT without
1492 * other side effects.
1493 *
1494 * side effects of acpi_boot_init:
1495 * acpi_lapic = 1 if LAPIC found
1496 * acpi_ioapic = 1 if IOAPIC found
1497 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1498 * if acpi_blacklisted() acpi_disabled = 1;
1499 * acpi_irq_model=...
1500 * ...
1501 */
1502
1503void __init acpi_boot_table_init(void)
1504{
1505 dmi_check_system(acpi_dmi_table);
1506
1507 /*
1508 * If acpi_disabled, bail out
1509 */
1510 if (acpi_disabled)
1511 return;
1512
1513 /*
1514 * Initialize the ACPI boot-time table parser.
1515 */
1516 if (acpi_table_init()) {
1517 disable_acpi();
1518 return;
1519 }
1520
1521 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1522
1523 /*
1524 * blacklist may disable ACPI entirely
1525 */
1526 if (acpi_blacklisted()) {
1527 if (acpi_force) {
1528 printk(KERN_WARNING PREFIX "acpi=force override\n");
1529 } else {
1530 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1531 disable_acpi();
1532 return;
1533 }
1534 }
1535}
1536
1537int __init early_acpi_boot_init(void)
1538{
1539 /*
1540 * If acpi_disabled, bail out
1541 */
1542 if (acpi_disabled)
1543 return 1;
1544
1545 /*
1546 * Process the Multiple APIC Description Table (MADT), if present
1547 */
1548 early_acpi_process_madt();
1549
1550 return 0;
1551}
1552
1553int __init acpi_boot_init(void)
1554{
1555 /* those are executed after early-quirks are executed */
1556 dmi_check_system(acpi_dmi_table_late);
1557
1558 /*
1559 * If acpi_disabled, bail out
1560 */
1561 if (acpi_disabled)
1562 return 1;
1563
1564 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1565
1566 /*
1567 * set sci_int and PM timer address
1568 */
1569 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1570
1571 /*
1572 * Process the Multiple APIC Description Table (MADT), if present
1573 */
1574 acpi_process_madt();
1575
1576 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1577
1578 if (!acpi_noirq)
1579 x86_init.pci.init = pci_acpi_init;
1580
1581 return 0;
1582}
1583
1584static int __init parse_acpi(char *arg)
1585{
1586 if (!arg)
1587 return -EINVAL;
1588
1589 /* "acpi=off" disables both ACPI table parsing and interpreter */
1590 if (strcmp(arg, "off") == 0) {
1591 disable_acpi();
1592 }
1593 /* acpi=force to over-ride black-list */
1594 else if (strcmp(arg, "force") == 0) {
1595 acpi_force = 1;
1596 acpi_disabled = 0;
1597 }
1598 /* acpi=strict disables out-of-spec workarounds */
1599 else if (strcmp(arg, "strict") == 0) {
1600 acpi_strict = 1;
1601 }
1602 /* acpi=rsdt use RSDT instead of XSDT */
1603 else if (strcmp(arg, "rsdt") == 0) {
1604 acpi_rsdt_forced = 1;
1605 }
1606 /* "acpi=noirq" disables ACPI interrupt routing */
1607 else if (strcmp(arg, "noirq") == 0) {
1608 acpi_noirq_set();
1609 }
1610 /* "acpi=copy_dsdt" copys DSDT */
1611 else if (strcmp(arg, "copy_dsdt") == 0) {
1612 acpi_gbl_copy_dsdt_locally = 1;
1613 } else {
1614 /* Core will printk when we return error. */
1615 return -EINVAL;
1616 }
1617 return 0;
1618}
1619early_param("acpi", parse_acpi);
1620
1621/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1622static int __init parse_pci(char *arg)
1623{
1624 if (arg && strcmp(arg, "noacpi") == 0)
1625 acpi_disable_pci();
1626 return 0;
1627}
1628early_param("pci", parse_pci);
1629
1630int __init acpi_mps_check(void)
1631{
1632#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1633/* mptable code is not built-in*/
1634 if (acpi_disabled || acpi_noirq) {
1635 printk(KERN_WARNING "MPS support code is not built-in.\n"
1636 "Using acpi=off or acpi=noirq or pci=noacpi "
1637 "may have problem\n");
1638 return 1;
1639 }
1640#endif
1641 return 0;
1642}
1643
1644#ifdef CONFIG_X86_IO_APIC
1645static int __init parse_acpi_skip_timer_override(char *arg)
1646{
1647 acpi_skip_timer_override = 1;
1648 return 0;
1649}
1650early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1651
1652static int __init parse_acpi_use_timer_override(char *arg)
1653{
1654 acpi_use_timer_override = 1;
1655 return 0;
1656}
1657early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1658#endif /* CONFIG_X86_IO_APIC */
1659
1660static int __init setup_acpi_sci(char *s)
1661{
1662 if (!s)
1663 return -EINVAL;
1664 if (!strcmp(s, "edge"))
1665 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1666 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1667 else if (!strcmp(s, "level"))
1668 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1669 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1670 else if (!strcmp(s, "high"))
1671 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1672 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1673 else if (!strcmp(s, "low"))
1674 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1675 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1676 else
1677 return -EINVAL;
1678 return 0;
1679}
1680early_param("acpi_sci", setup_acpi_sci);
1681
1682int __acpi_acquire_global_lock(unsigned int *lock)
1683{
1684 unsigned int old, new, val;
1685 do {
1686 old = *lock;
1687 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1688 val = cmpxchg(lock, old, new);
1689 } while (unlikely (val != old));
1690 return (new < 3) ? -1 : 0;
1691}
1692
1693int __acpi_release_global_lock(unsigned int *lock)
1694{
1695 unsigned int old, new, val;
1696 do {
1697 old = *lock;
1698 new = old & ~0x3;
1699 val = cmpxchg(lock, old, new);
1700 } while (unlikely (val != old));
1701 return old & 0x1;
1702}
1/*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26#include <linux/init.h>
27#include <linux/acpi.h>
28#include <linux/acpi_pmtmr.h>
29#include <linux/efi.h>
30#include <linux/cpumask.h>
31#include <linux/module.h>
32#include <linux/dmi.h>
33#include <linux/irq.h>
34#include <linux/slab.h>
35#include <linux/bootmem.h>
36#include <linux/ioport.h>
37#include <linux/pci.h>
38
39#include <asm/pci_x86.h>
40#include <asm/pgtable.h>
41#include <asm/io_apic.h>
42#include <asm/apic.h>
43#include <asm/io.h>
44#include <asm/mpspec.h>
45#include <asm/smp.h>
46
47#include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
48static int __initdata acpi_force = 0;
49int acpi_disabled;
50EXPORT_SYMBOL(acpi_disabled);
51
52#ifdef CONFIG_X86_64
53# include <asm/proto.h>
54#endif /* X86 */
55
56#define PREFIX "ACPI: "
57
58int acpi_noirq; /* skip ACPI IRQ initialization */
59int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
60EXPORT_SYMBOL(acpi_pci_disabled);
61
62int acpi_lapic;
63int acpi_ioapic;
64int acpi_strict;
65int acpi_disable_cmcff;
66
67u8 acpi_sci_flags __initdata;
68int acpi_sci_override_gsi __initdata;
69int acpi_skip_timer_override __initdata;
70int acpi_use_timer_override __initdata;
71int acpi_fix_pin2_polarity __initdata;
72
73#ifdef CONFIG_X86_LOCAL_APIC
74static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
75#endif
76
77#ifndef __HAVE_ARCH_CMPXCHG
78#warning ACPI uses CMPXCHG, i486 and later hardware
79#endif
80
81/* --------------------------------------------------------------------------
82 Boot-time Configuration
83 -------------------------------------------------------------------------- */
84
85/*
86 * The default interrupt routing model is PIC (8259). This gets
87 * overridden if IOAPICs are enumerated (below).
88 */
89enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
90
91
92/*
93 * ISA irqs by default are the first 16 gsis but can be
94 * any gsi as specified by an interrupt source override.
95 */
96static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
97 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
98};
99
100static unsigned int gsi_to_irq(unsigned int gsi)
101{
102 unsigned int irq = gsi + NR_IRQS_LEGACY;
103 unsigned int i;
104
105 for (i = 0; i < NR_IRQS_LEGACY; i++) {
106 if (isa_irq_to_gsi[i] == gsi) {
107 return i;
108 }
109 }
110
111 /* Provide an identity mapping of gsi == irq
112 * except on truly weird platforms that have
113 * non isa irqs in the first 16 gsis.
114 */
115 if (gsi >= NR_IRQS_LEGACY)
116 irq = gsi;
117 else
118 irq = gsi_top + gsi;
119
120 return irq;
121}
122
123static u32 irq_to_gsi(int irq)
124{
125 unsigned int gsi;
126
127 if (irq < NR_IRQS_LEGACY)
128 gsi = isa_irq_to_gsi[irq];
129 else if (irq < gsi_top)
130 gsi = irq;
131 else if (irq < (gsi_top + NR_IRQS_LEGACY))
132 gsi = irq - gsi_top;
133 else
134 gsi = 0xffffffff;
135
136 return gsi;
137}
138
139/*
140 * This is just a simple wrapper around early_ioremap(),
141 * with sanity checks for phys == 0 and size == 0.
142 */
143char *__init __acpi_map_table(unsigned long phys, unsigned long size)
144{
145
146 if (!phys || !size)
147 return NULL;
148
149 return early_ioremap(phys, size);
150}
151
152void __init __acpi_unmap_table(char *map, unsigned long size)
153{
154 if (!map || !size)
155 return;
156
157 early_iounmap(map, size);
158}
159
160#ifdef CONFIG_X86_LOCAL_APIC
161static int __init acpi_parse_madt(struct acpi_table_header *table)
162{
163 struct acpi_table_madt *madt = NULL;
164
165 if (!cpu_has_apic)
166 return -EINVAL;
167
168 madt = (struct acpi_table_madt *)table;
169 if (!madt) {
170 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
171 return -ENODEV;
172 }
173
174 if (madt->address) {
175 acpi_lapic_addr = (u64) madt->address;
176
177 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
178 madt->address);
179 }
180
181 default_acpi_madt_oem_check(madt->header.oem_id,
182 madt->header.oem_table_id);
183
184 return 0;
185}
186
187/**
188 * acpi_register_lapic - register a local apic and generates a logic cpu number
189 * @id: local apic id to register
190 * @enabled: this cpu is enabled or not
191 *
192 * Returns the logic cpu number which maps to the local apic
193 */
194static int acpi_register_lapic(int id, u8 enabled)
195{
196 unsigned int ver = 0;
197
198 if (id >= MAX_LOCAL_APIC) {
199 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
200 return -EINVAL;
201 }
202
203 if (!enabled) {
204 ++disabled_cpus;
205 return -EINVAL;
206 }
207
208 if (boot_cpu_physical_apicid != -1U)
209 ver = apic_version[boot_cpu_physical_apicid];
210
211 return generic_processor_info(id, ver);
212}
213
214static int __init
215acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
216{
217 struct acpi_madt_local_x2apic *processor = NULL;
218 int apic_id;
219 u8 enabled;
220
221 processor = (struct acpi_madt_local_x2apic *)header;
222
223 if (BAD_MADT_ENTRY(processor, end))
224 return -EINVAL;
225
226 acpi_table_print_madt_entry(header);
227
228 apic_id = processor->local_apic_id;
229 enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
230#ifdef CONFIG_X86_X2APIC
231 /*
232 * We need to register disabled CPU as well to permit
233 * counting disabled CPUs. This allows us to size
234 * cpus_possible_map more accurately, to permit
235 * to not preallocating memory for all NR_CPUS
236 * when we use CPU hotplug.
237 */
238 if (!apic->apic_id_valid(apic_id) && enabled)
239 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
240 else
241 acpi_register_lapic(apic_id, enabled);
242#else
243 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
244#endif
245
246 return 0;
247}
248
249static int __init
250acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
251{
252 struct acpi_madt_local_apic *processor = NULL;
253
254 processor = (struct acpi_madt_local_apic *)header;
255
256 if (BAD_MADT_ENTRY(processor, end))
257 return -EINVAL;
258
259 acpi_table_print_madt_entry(header);
260
261 /*
262 * We need to register disabled CPU as well to permit
263 * counting disabled CPUs. This allows us to size
264 * cpus_possible_map more accurately, to permit
265 * to not preallocating memory for all NR_CPUS
266 * when we use CPU hotplug.
267 */
268 acpi_register_lapic(processor->id, /* APIC ID */
269 processor->lapic_flags & ACPI_MADT_ENABLED);
270
271 return 0;
272}
273
274static int __init
275acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
276{
277 struct acpi_madt_local_sapic *processor = NULL;
278
279 processor = (struct acpi_madt_local_sapic *)header;
280
281 if (BAD_MADT_ENTRY(processor, end))
282 return -EINVAL;
283
284 acpi_table_print_madt_entry(header);
285
286 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
287 processor->lapic_flags & ACPI_MADT_ENABLED);
288
289 return 0;
290}
291
292static int __init
293acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
294 const unsigned long end)
295{
296 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
297
298 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
299
300 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
301 return -EINVAL;
302
303 acpi_lapic_addr = lapic_addr_ovr->address;
304
305 return 0;
306}
307
308static int __init
309acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
310 const unsigned long end)
311{
312 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
313
314 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
315
316 if (BAD_MADT_ENTRY(x2apic_nmi, end))
317 return -EINVAL;
318
319 acpi_table_print_madt_entry(header);
320
321 if (x2apic_nmi->lint != 1)
322 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
323
324 return 0;
325}
326
327static int __init
328acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
329{
330 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
331
332 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
333
334 if (BAD_MADT_ENTRY(lapic_nmi, end))
335 return -EINVAL;
336
337 acpi_table_print_madt_entry(header);
338
339 if (lapic_nmi->lint != 1)
340 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
341
342 return 0;
343}
344
345#endif /*CONFIG_X86_LOCAL_APIC */
346
347#ifdef CONFIG_X86_IO_APIC
348
349static int __init
350acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
351{
352 struct acpi_madt_io_apic *ioapic = NULL;
353
354 ioapic = (struct acpi_madt_io_apic *)header;
355
356 if (BAD_MADT_ENTRY(ioapic, end))
357 return -EINVAL;
358
359 acpi_table_print_madt_entry(header);
360
361 mp_register_ioapic(ioapic->id,
362 ioapic->address, ioapic->global_irq_base);
363
364 return 0;
365}
366
367/*
368 * Parse Interrupt Source Override for the ACPI SCI
369 */
370static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
371{
372 if (trigger == 0) /* compatible SCI trigger is level */
373 trigger = 3;
374
375 if (polarity == 0) /* compatible SCI polarity is low */
376 polarity = 3;
377
378 /* Command-line over-ride via acpi_sci= */
379 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
380 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
381
382 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
383 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
384
385 /*
386 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
387 * If GSI is < 16, this will update its flags,
388 * else it will create a new mp_irqs[] entry.
389 */
390 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
391
392 /*
393 * stash over-ride to indicate we've been here
394 * and for later update of acpi_gbl_FADT
395 */
396 acpi_sci_override_gsi = gsi;
397 return;
398}
399
400static int __init
401acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
402 const unsigned long end)
403{
404 struct acpi_madt_interrupt_override *intsrc = NULL;
405
406 intsrc = (struct acpi_madt_interrupt_override *)header;
407
408 if (BAD_MADT_ENTRY(intsrc, end))
409 return -EINVAL;
410
411 acpi_table_print_madt_entry(header);
412
413 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
414 acpi_sci_ioapic_setup(intsrc->source_irq,
415 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
416 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
417 intsrc->global_irq);
418 return 0;
419 }
420
421 if (intsrc->source_irq == 0) {
422 if (acpi_skip_timer_override) {
423 printk(PREFIX "BIOS IRQ0 override ignored.\n");
424 return 0;
425 }
426
427 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
428 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
429 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
430 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
431 }
432 }
433
434 mp_override_legacy_irq(intsrc->source_irq,
435 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
436 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
437 intsrc->global_irq);
438
439 return 0;
440}
441
442static int __init
443acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
444{
445 struct acpi_madt_nmi_source *nmi_src = NULL;
446
447 nmi_src = (struct acpi_madt_nmi_source *)header;
448
449 if (BAD_MADT_ENTRY(nmi_src, end))
450 return -EINVAL;
451
452 acpi_table_print_madt_entry(header);
453
454 /* TBD: Support nimsrc entries? */
455
456 return 0;
457}
458
459#endif /* CONFIG_X86_IO_APIC */
460
461/*
462 * acpi_pic_sci_set_trigger()
463 *
464 * use ELCR to set PIC-mode trigger type for SCI
465 *
466 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
467 * it may require Edge Trigger -- use "acpi_sci=edge"
468 *
469 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
470 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
471 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
472 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
473 */
474
475void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
476{
477 unsigned int mask = 1 << irq;
478 unsigned int old, new;
479
480 /* Real old ELCR mask */
481 old = inb(0x4d0) | (inb(0x4d1) << 8);
482
483 /*
484 * If we use ACPI to set PCI IRQs, then we should clear ELCR
485 * since we will set it correctly as we enable the PCI irq
486 * routing.
487 */
488 new = acpi_noirq ? old : 0;
489
490 /*
491 * Update SCI information in the ELCR, it isn't in the PCI
492 * routing tables..
493 */
494 switch (trigger) {
495 case 1: /* Edge - clear */
496 new &= ~mask;
497 break;
498 case 3: /* Level - set */
499 new |= mask;
500 break;
501 }
502
503 if (old == new)
504 return;
505
506 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
507 outb(new, 0x4d0);
508 outb(new >> 8, 0x4d1);
509}
510
511int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
512{
513 *irq = gsi_to_irq(gsi);
514
515#ifdef CONFIG_X86_IO_APIC
516 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
517 setup_IO_APIC_irq_extra(gsi);
518#endif
519
520 return 0;
521}
522EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
523
524int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
525{
526 if (isa_irq >= 16)
527 return -1;
528 *gsi = irq_to_gsi(isa_irq);
529 return 0;
530}
531
532static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
533 int trigger, int polarity)
534{
535#ifdef CONFIG_PCI
536 /*
537 * Make sure all (legacy) PCI IRQs are set as level-triggered.
538 */
539 if (trigger == ACPI_LEVEL_SENSITIVE)
540 eisa_set_level_irq(gsi);
541#endif
542
543 return gsi;
544}
545
546static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
547 int trigger, int polarity)
548{
549#ifdef CONFIG_X86_IO_APIC
550 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
551#endif
552
553 return gsi;
554}
555
556int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
557 int trigger, int polarity) = acpi_register_gsi_pic;
558
559#ifdef CONFIG_ACPI_SLEEP
560int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
561#else
562int (*acpi_suspend_lowlevel)(void);
563#endif
564
565/*
566 * success: return IRQ number (>=0)
567 * failure: return < 0
568 */
569int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
570{
571 unsigned int irq;
572 unsigned int plat_gsi = gsi;
573
574 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
575 irq = gsi_to_irq(plat_gsi);
576
577 return irq;
578}
579EXPORT_SYMBOL_GPL(acpi_register_gsi);
580
581void acpi_unregister_gsi(u32 gsi)
582{
583}
584EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
585
586void __init acpi_set_irq_model_pic(void)
587{
588 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
589 __acpi_register_gsi = acpi_register_gsi_pic;
590 acpi_ioapic = 0;
591}
592
593void __init acpi_set_irq_model_ioapic(void)
594{
595 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
596 __acpi_register_gsi = acpi_register_gsi_ioapic;
597 acpi_ioapic = 1;
598}
599
600/*
601 * ACPI based hotplug support for CPU
602 */
603#ifdef CONFIG_ACPI_HOTPLUG_CPU
604#include <acpi/processor.h>
605
606static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
607{
608#ifdef CONFIG_ACPI_NUMA
609 int nid;
610
611 nid = acpi_get_node(handle);
612 if (nid != -1) {
613 set_apicid_to_node(physid, nid);
614 numa_set_node(cpu, nid);
615 }
616#endif
617}
618
619static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
620{
621 int cpu;
622
623 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
624 if (cpu < 0) {
625 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
626 return cpu;
627 }
628
629 acpi_processor_set_pdc(handle);
630 acpi_map_cpu2node(handle, cpu, physid);
631
632 *pcpu = cpu;
633 return 0;
634}
635
636/* wrapper to silence section mismatch warning */
637int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
638{
639 return _acpi_map_lsapic(handle, physid, pcpu);
640}
641EXPORT_SYMBOL(acpi_map_lsapic);
642
643int acpi_unmap_lsapic(int cpu)
644{
645#ifdef CONFIG_ACPI_NUMA
646 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
647#endif
648
649 per_cpu(x86_cpu_to_apicid, cpu) = -1;
650 set_cpu_present(cpu, false);
651 num_processors--;
652
653 return (0);
654}
655
656EXPORT_SYMBOL(acpi_unmap_lsapic);
657#endif /* CONFIG_ACPI_HOTPLUG_CPU */
658
659int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
660{
661 /* TBD */
662 return -EINVAL;
663}
664
665EXPORT_SYMBOL(acpi_register_ioapic);
666
667int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
668{
669 /* TBD */
670 return -EINVAL;
671}
672
673EXPORT_SYMBOL(acpi_unregister_ioapic);
674
675static int __init acpi_parse_sbf(struct acpi_table_header *table)
676{
677 struct acpi_table_boot *sb;
678
679 sb = (struct acpi_table_boot *)table;
680 if (!sb) {
681 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
682 return -ENODEV;
683 }
684
685 sbf_port = sb->cmos_index; /* Save CMOS port */
686
687 return 0;
688}
689
690#ifdef CONFIG_HPET_TIMER
691#include <asm/hpet.h>
692
693static struct resource *hpet_res __initdata;
694
695static int __init acpi_parse_hpet(struct acpi_table_header *table)
696{
697 struct acpi_table_hpet *hpet_tbl;
698
699 hpet_tbl = (struct acpi_table_hpet *)table;
700 if (!hpet_tbl) {
701 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
702 return -ENODEV;
703 }
704
705 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
706 printk(KERN_WARNING PREFIX "HPET timers must be located in "
707 "memory.\n");
708 return -1;
709 }
710
711 hpet_address = hpet_tbl->address.address;
712 hpet_blockid = hpet_tbl->sequence;
713
714 /*
715 * Some broken BIOSes advertise HPET at 0x0. We really do not
716 * want to allocate a resource there.
717 */
718 if (!hpet_address) {
719 printk(KERN_WARNING PREFIX
720 "HPET id: %#x base: %#lx is invalid\n",
721 hpet_tbl->id, hpet_address);
722 return 0;
723 }
724#ifdef CONFIG_X86_64
725 /*
726 * Some even more broken BIOSes advertise HPET at
727 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
728 * some noise:
729 */
730 if (hpet_address == 0xfed0000000000000UL) {
731 if (!hpet_force_user) {
732 printk(KERN_WARNING PREFIX "HPET id: %#x "
733 "base: 0xfed0000000000000 is bogus\n "
734 "try hpet=force on the kernel command line to "
735 "fix it up to 0xfed00000.\n", hpet_tbl->id);
736 hpet_address = 0;
737 return 0;
738 }
739 printk(KERN_WARNING PREFIX
740 "HPET id: %#x base: 0xfed0000000000000 fixed up "
741 "to 0xfed00000.\n", hpet_tbl->id);
742 hpet_address >>= 32;
743 }
744#endif
745 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
746 hpet_tbl->id, hpet_address);
747
748 /*
749 * Allocate and initialize the HPET firmware resource for adding into
750 * the resource tree during the lateinit timeframe.
751 */
752#define HPET_RESOURCE_NAME_SIZE 9
753 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
754
755 hpet_res->name = (void *)&hpet_res[1];
756 hpet_res->flags = IORESOURCE_MEM;
757 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
758 hpet_tbl->sequence);
759
760 hpet_res->start = hpet_address;
761 hpet_res->end = hpet_address + (1 * 1024) - 1;
762
763 return 0;
764}
765
766/*
767 * hpet_insert_resource inserts the HPET resources used into the resource
768 * tree.
769 */
770static __init int hpet_insert_resource(void)
771{
772 if (!hpet_res)
773 return 1;
774
775 return insert_resource(&iomem_resource, hpet_res);
776}
777
778late_initcall(hpet_insert_resource);
779
780#else
781#define acpi_parse_hpet NULL
782#endif
783
784static int __init acpi_parse_fadt(struct acpi_table_header *table)
785{
786
787#ifdef CONFIG_X86_PM_TIMER
788 /* detect the location of the ACPI PM Timer */
789 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
790 /* FADT rev. 2 */
791 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
792 ACPI_ADR_SPACE_SYSTEM_IO)
793 return 0;
794
795 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
796 /*
797 * "X" fields are optional extensions to the original V1.0
798 * fields, so we must selectively expand V1.0 fields if the
799 * corresponding X field is zero.
800 */
801 if (!pmtmr_ioport)
802 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
803 } else {
804 /* FADT rev. 1 */
805 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
806 }
807 if (pmtmr_ioport)
808 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
809 pmtmr_ioport);
810#endif
811 return 0;
812}
813
814#ifdef CONFIG_X86_LOCAL_APIC
815/*
816 * Parse LAPIC entries in MADT
817 * returns 0 on success, < 0 on error
818 */
819
820static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
821{
822 int count;
823
824 if (!cpu_has_apic)
825 return -ENODEV;
826
827 /*
828 * Note that the LAPIC address is obtained from the MADT (32-bit value)
829 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
830 */
831
832 count =
833 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
834 acpi_parse_lapic_addr_ovr, 0);
835 if (count < 0) {
836 printk(KERN_ERR PREFIX
837 "Error parsing LAPIC address override entry\n");
838 return count;
839 }
840
841 register_lapic_address(acpi_lapic_addr);
842
843 return count;
844}
845
846static int __init acpi_parse_madt_lapic_entries(void)
847{
848 int count;
849 int x2count = 0;
850
851 if (!cpu_has_apic)
852 return -ENODEV;
853
854 /*
855 * Note that the LAPIC address is obtained from the MADT (32-bit value)
856 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
857 */
858
859 count =
860 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
861 acpi_parse_lapic_addr_ovr, 0);
862 if (count < 0) {
863 printk(KERN_ERR PREFIX
864 "Error parsing LAPIC address override entry\n");
865 return count;
866 }
867
868 register_lapic_address(acpi_lapic_addr);
869
870 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
871 acpi_parse_sapic, MAX_LOCAL_APIC);
872
873 if (!count) {
874 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
875 acpi_parse_x2apic, MAX_LOCAL_APIC);
876 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
877 acpi_parse_lapic, MAX_LOCAL_APIC);
878 }
879 if (!count && !x2count) {
880 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
881 /* TBD: Cleanup to allow fallback to MPS */
882 return -ENODEV;
883 } else if (count < 0 || x2count < 0) {
884 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
885 /* TBD: Cleanup to allow fallback to MPS */
886 return count;
887 }
888
889 x2count =
890 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
891 acpi_parse_x2apic_nmi, 0);
892 count =
893 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
894 if (count < 0 || x2count < 0) {
895 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
896 /* TBD: Cleanup to allow fallback to MPS */
897 return count;
898 }
899 return 0;
900}
901#endif /* CONFIG_X86_LOCAL_APIC */
902
903#ifdef CONFIG_X86_IO_APIC
904#define MP_ISA_BUS 0
905
906void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
907{
908 int ioapic;
909 int pin;
910 struct mpc_intsrc mp_irq;
911
912 /*
913 * Convert 'gsi' to 'ioapic.pin'.
914 */
915 ioapic = mp_find_ioapic(gsi);
916 if (ioapic < 0)
917 return;
918 pin = mp_find_ioapic_pin(ioapic, gsi);
919
920 /*
921 * TBD: This check is for faulty timer entries, where the override
922 * erroneously sets the trigger to level, resulting in a HUGE
923 * increase of timer interrupts!
924 */
925 if ((bus_irq == 0) && (trigger == 3))
926 trigger = 1;
927
928 mp_irq.type = MP_INTSRC;
929 mp_irq.irqtype = mp_INT;
930 mp_irq.irqflag = (trigger << 2) | polarity;
931 mp_irq.srcbus = MP_ISA_BUS;
932 mp_irq.srcbusirq = bus_irq; /* IRQ */
933 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
934 mp_irq.dstirq = pin; /* INTIN# */
935
936 mp_save_irq(&mp_irq);
937
938 isa_irq_to_gsi[bus_irq] = gsi;
939}
940
941void __init mp_config_acpi_legacy_irqs(void)
942{
943 int i;
944 struct mpc_intsrc mp_irq;
945
946#ifdef CONFIG_EISA
947 /*
948 * Fabricate the legacy ISA bus (bus #31).
949 */
950 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
951#endif
952 set_bit(MP_ISA_BUS, mp_bus_not_pci);
953 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
954
955 /*
956 * Use the default configuration for the IRQs 0-15. Unless
957 * overridden by (MADT) interrupt source override entries.
958 */
959 for (i = 0; i < 16; i++) {
960 int ioapic, pin;
961 unsigned int dstapic;
962 int idx;
963 u32 gsi;
964
965 /* Locate the gsi that irq i maps to. */
966 if (acpi_isa_irq_to_gsi(i, &gsi))
967 continue;
968
969 /*
970 * Locate the IOAPIC that manages the ISA IRQ.
971 */
972 ioapic = mp_find_ioapic(gsi);
973 if (ioapic < 0)
974 continue;
975 pin = mp_find_ioapic_pin(ioapic, gsi);
976 dstapic = mpc_ioapic_id(ioapic);
977
978 for (idx = 0; idx < mp_irq_entries; idx++) {
979 struct mpc_intsrc *irq = mp_irqs + idx;
980
981 /* Do we already have a mapping for this ISA IRQ? */
982 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
983 break;
984
985 /* Do we already have a mapping for this IOAPIC pin */
986 if (irq->dstapic == dstapic && irq->dstirq == pin)
987 break;
988 }
989
990 if (idx != mp_irq_entries) {
991 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
992 continue; /* IRQ already used */
993 }
994
995 mp_irq.type = MP_INTSRC;
996 mp_irq.irqflag = 0; /* Conforming */
997 mp_irq.srcbus = MP_ISA_BUS;
998 mp_irq.dstapic = dstapic;
999 mp_irq.irqtype = mp_INT;
1000 mp_irq.srcbusirq = i; /* Identity mapped */
1001 mp_irq.dstirq = pin;
1002
1003 mp_save_irq(&mp_irq);
1004 }
1005}
1006
1007static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1008 int polarity)
1009{
1010#ifdef CONFIG_X86_MPPARSE
1011 struct mpc_intsrc mp_irq;
1012 struct pci_dev *pdev;
1013 unsigned char number;
1014 unsigned int devfn;
1015 int ioapic;
1016 u8 pin;
1017
1018 if (!acpi_ioapic)
1019 return 0;
1020 if (!dev || !dev_is_pci(dev))
1021 return 0;
1022
1023 pdev = to_pci_dev(dev);
1024 number = pdev->bus->number;
1025 devfn = pdev->devfn;
1026 pin = pdev->pin;
1027 /* print the entry should happen on mptable identically */
1028 mp_irq.type = MP_INTSRC;
1029 mp_irq.irqtype = mp_INT;
1030 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1031 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1032 mp_irq.srcbus = number;
1033 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1034 ioapic = mp_find_ioapic(gsi);
1035 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1036 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1037
1038 mp_save_irq(&mp_irq);
1039#endif
1040 return 0;
1041}
1042
1043int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1044{
1045 int ioapic;
1046 int ioapic_pin;
1047 struct io_apic_irq_attr irq_attr;
1048 int ret;
1049
1050 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1051 return gsi;
1052
1053 /* Don't set up the ACPI SCI because it's already set up */
1054 if (acpi_gbl_FADT.sci_interrupt == gsi)
1055 return gsi;
1056
1057 ioapic = mp_find_ioapic(gsi);
1058 if (ioapic < 0) {
1059 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1060 return gsi;
1061 }
1062
1063 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1064
1065 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1066 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1067 "%d-%d\n", mpc_ioapic_id(ioapic),
1068 ioapic_pin);
1069 return gsi;
1070 }
1071
1072 if (enable_update_mptable)
1073 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1074
1075 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1076 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1077 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1078 ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1079 if (ret < 0)
1080 gsi = INT_MIN;
1081
1082 return gsi;
1083}
1084
1085/*
1086 * Parse IOAPIC related entries in MADT
1087 * returns 0 on success, < 0 on error
1088 */
1089static int __init acpi_parse_madt_ioapic_entries(void)
1090{
1091 int count;
1092
1093 /*
1094 * ACPI interpreter is required to complete interrupt setup,
1095 * so if it is off, don't enumerate the io-apics with ACPI.
1096 * If MPS is present, it will handle them,
1097 * otherwise the system will stay in PIC mode
1098 */
1099 if (acpi_disabled || acpi_noirq)
1100 return -ENODEV;
1101
1102 if (!cpu_has_apic)
1103 return -ENODEV;
1104
1105 /*
1106 * if "noapic" boot option, don't look for IO-APICs
1107 */
1108 if (skip_ioapic_setup) {
1109 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1110 "due to 'noapic' option.\n");
1111 return -ENODEV;
1112 }
1113
1114 count =
1115 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1116 MAX_IO_APICS);
1117 if (!count) {
1118 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1119 return -ENODEV;
1120 } else if (count < 0) {
1121 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1122 return count;
1123 }
1124
1125 count =
1126 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1127 nr_irqs);
1128 if (count < 0) {
1129 printk(KERN_ERR PREFIX
1130 "Error parsing interrupt source overrides entry\n");
1131 /* TBD: Cleanup to allow fallback to MPS */
1132 return count;
1133 }
1134
1135 /*
1136 * If BIOS did not supply an INT_SRC_OVR for the SCI
1137 * pretend we got one so we can set the SCI flags.
1138 */
1139 if (!acpi_sci_override_gsi)
1140 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1141 acpi_gbl_FADT.sci_interrupt);
1142
1143 /* Fill in identity legacy mappings where no override */
1144 mp_config_acpi_legacy_irqs();
1145
1146 count =
1147 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1148 nr_irqs);
1149 if (count < 0) {
1150 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1151 /* TBD: Cleanup to allow fallback to MPS */
1152 return count;
1153 }
1154
1155 return 0;
1156}
1157#else
1158static inline int acpi_parse_madt_ioapic_entries(void)
1159{
1160 return -1;
1161}
1162#endif /* !CONFIG_X86_IO_APIC */
1163
1164static void __init early_acpi_process_madt(void)
1165{
1166#ifdef CONFIG_X86_LOCAL_APIC
1167 int error;
1168
1169 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1170
1171 /*
1172 * Parse MADT LAPIC entries
1173 */
1174 error = early_acpi_parse_madt_lapic_addr_ovr();
1175 if (!error) {
1176 acpi_lapic = 1;
1177 smp_found_config = 1;
1178 }
1179 if (error == -EINVAL) {
1180 /*
1181 * Dell Precision Workstation 410, 610 come here.
1182 */
1183 printk(KERN_ERR PREFIX
1184 "Invalid BIOS MADT, disabling ACPI\n");
1185 disable_acpi();
1186 }
1187 }
1188#endif
1189}
1190
1191static void __init acpi_process_madt(void)
1192{
1193#ifdef CONFIG_X86_LOCAL_APIC
1194 int error;
1195
1196 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1197
1198 /*
1199 * Parse MADT LAPIC entries
1200 */
1201 error = acpi_parse_madt_lapic_entries();
1202 if (!error) {
1203 acpi_lapic = 1;
1204
1205 /*
1206 * Parse MADT IO-APIC entries
1207 */
1208 error = acpi_parse_madt_ioapic_entries();
1209 if (!error) {
1210 acpi_set_irq_model_ioapic();
1211
1212 smp_found_config = 1;
1213 }
1214 }
1215 if (error == -EINVAL) {
1216 /*
1217 * Dell Precision Workstation 410, 610 come here.
1218 */
1219 printk(KERN_ERR PREFIX
1220 "Invalid BIOS MADT, disabling ACPI\n");
1221 disable_acpi();
1222 }
1223 } else {
1224 /*
1225 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1226 * In the event an MPS table was found, forget it.
1227 * Boot with "acpi=off" to use MPS on such a system.
1228 */
1229 if (smp_found_config) {
1230 printk(KERN_WARNING PREFIX
1231 "No APIC-table, disabling MPS\n");
1232 smp_found_config = 0;
1233 }
1234 }
1235
1236 /*
1237 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1238 * processors, where MPS only supports physical.
1239 */
1240 if (acpi_lapic && acpi_ioapic)
1241 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1242 "information\n");
1243 else if (acpi_lapic)
1244 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1245 "configuration information\n");
1246#endif
1247 return;
1248}
1249
1250static int __init disable_acpi_irq(const struct dmi_system_id *d)
1251{
1252 if (!acpi_force) {
1253 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1254 d->ident);
1255 acpi_noirq_set();
1256 }
1257 return 0;
1258}
1259
1260static int __init disable_acpi_pci(const struct dmi_system_id *d)
1261{
1262 if (!acpi_force) {
1263 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1264 d->ident);
1265 acpi_disable_pci();
1266 }
1267 return 0;
1268}
1269
1270static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1271{
1272 if (!acpi_force) {
1273 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1274 disable_acpi();
1275 } else {
1276 printk(KERN_NOTICE
1277 "Warning: DMI blacklist says broken, but acpi forced\n");
1278 }
1279 return 0;
1280}
1281
1282/*
1283 * Force ignoring BIOS IRQ0 override
1284 */
1285static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1286{
1287 if (!acpi_skip_timer_override) {
1288 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1289 d->ident);
1290 acpi_skip_timer_override = 1;
1291 }
1292 return 0;
1293}
1294
1295/*
1296 * If your system is blacklisted here, but you find that acpi=force
1297 * works for you, please contact linux-acpi@vger.kernel.org
1298 */
1299static struct dmi_system_id __initdata acpi_dmi_table[] = {
1300 /*
1301 * Boxes that need ACPI disabled
1302 */
1303 {
1304 .callback = dmi_disable_acpi,
1305 .ident = "IBM Thinkpad",
1306 .matches = {
1307 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1308 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1309 },
1310 },
1311
1312 /*
1313 * Boxes that need ACPI PCI IRQ routing disabled
1314 */
1315 {
1316 .callback = disable_acpi_irq,
1317 .ident = "ASUS A7V",
1318 .matches = {
1319 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1320 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1321 /* newer BIOS, Revision 1011, does work */
1322 DMI_MATCH(DMI_BIOS_VERSION,
1323 "ASUS A7V ACPI BIOS Revision 1007"),
1324 },
1325 },
1326 {
1327 /*
1328 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1329 * for LPC bridge, which is needed for the PCI
1330 * interrupt links to work. DSDT fix is in bug 5966.
1331 * 2645, 2646 model numbers are shared with 600/600E/600X
1332 */
1333 .callback = disable_acpi_irq,
1334 .ident = "IBM Thinkpad 600 Series 2645",
1335 .matches = {
1336 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1337 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1338 },
1339 },
1340 {
1341 .callback = disable_acpi_irq,
1342 .ident = "IBM Thinkpad 600 Series 2646",
1343 .matches = {
1344 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1345 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1346 },
1347 },
1348 /*
1349 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1350 */
1351 { /* _BBN 0 bug */
1352 .callback = disable_acpi_pci,
1353 .ident = "ASUS PR-DLS",
1354 .matches = {
1355 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1356 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1357 DMI_MATCH(DMI_BIOS_VERSION,
1358 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1359 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1360 },
1361 },
1362 {
1363 .callback = disable_acpi_pci,
1364 .ident = "Acer TravelMate 36x Laptop",
1365 .matches = {
1366 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1367 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1368 },
1369 },
1370 {}
1371};
1372
1373/* second table for DMI checks that should run after early-quirks */
1374static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1375 /*
1376 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1377 * which includes some code which overrides all temperature
1378 * trip points to 16C if the INTIN2 input of the I/O APIC
1379 * is enabled. This input is incorrectly designated the
1380 * ISA IRQ 0 via an interrupt source override even though
1381 * it is wired to the output of the master 8259A and INTIN0
1382 * is not connected at all. Force ignoring BIOS IRQ0
1383 * override in that cases.
1384 */
1385 {
1386 .callback = dmi_ignore_irq0_timer_override,
1387 .ident = "HP nx6115 laptop",
1388 .matches = {
1389 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1390 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1391 },
1392 },
1393 {
1394 .callback = dmi_ignore_irq0_timer_override,
1395 .ident = "HP NX6125 laptop",
1396 .matches = {
1397 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1398 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1399 },
1400 },
1401 {
1402 .callback = dmi_ignore_irq0_timer_override,
1403 .ident = "HP NX6325 laptop",
1404 .matches = {
1405 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1406 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1407 },
1408 },
1409 {
1410 .callback = dmi_ignore_irq0_timer_override,
1411 .ident = "HP 6715b laptop",
1412 .matches = {
1413 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1414 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1415 },
1416 },
1417 {
1418 .callback = dmi_ignore_irq0_timer_override,
1419 .ident = "FUJITSU SIEMENS",
1420 .matches = {
1421 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1422 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1423 },
1424 },
1425 {}
1426};
1427
1428/*
1429 * acpi_boot_table_init() and acpi_boot_init()
1430 * called from setup_arch(), always.
1431 * 1. checksums all tables
1432 * 2. enumerates lapics
1433 * 3. enumerates io-apics
1434 *
1435 * acpi_table_init() is separate to allow reading SRAT without
1436 * other side effects.
1437 *
1438 * side effects of acpi_boot_init:
1439 * acpi_lapic = 1 if LAPIC found
1440 * acpi_ioapic = 1 if IOAPIC found
1441 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1442 * if acpi_blacklisted() acpi_disabled = 1;
1443 * acpi_irq_model=...
1444 * ...
1445 */
1446
1447void __init acpi_boot_table_init(void)
1448{
1449 dmi_check_system(acpi_dmi_table);
1450
1451 /*
1452 * If acpi_disabled, bail out
1453 */
1454 if (acpi_disabled)
1455 return;
1456
1457 /*
1458 * Initialize the ACPI boot-time table parser.
1459 */
1460 if (acpi_table_init()) {
1461 disable_acpi();
1462 return;
1463 }
1464
1465 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1466
1467 /*
1468 * blacklist may disable ACPI entirely
1469 */
1470 if (acpi_blacklisted()) {
1471 if (acpi_force) {
1472 printk(KERN_WARNING PREFIX "acpi=force override\n");
1473 } else {
1474 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1475 disable_acpi();
1476 return;
1477 }
1478 }
1479}
1480
1481int __init early_acpi_boot_init(void)
1482{
1483 /*
1484 * If acpi_disabled, bail out
1485 */
1486 if (acpi_disabled)
1487 return 1;
1488
1489 /*
1490 * Process the Multiple APIC Description Table (MADT), if present
1491 */
1492 early_acpi_process_madt();
1493
1494 return 0;
1495}
1496
1497int __init acpi_boot_init(void)
1498{
1499 /* those are executed after early-quirks are executed */
1500 dmi_check_system(acpi_dmi_table_late);
1501
1502 /*
1503 * If acpi_disabled, bail out
1504 */
1505 if (acpi_disabled)
1506 return 1;
1507
1508 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1509
1510 /*
1511 * set sci_int and PM timer address
1512 */
1513 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1514
1515 /*
1516 * Process the Multiple APIC Description Table (MADT), if present
1517 */
1518 acpi_process_madt();
1519
1520 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1521
1522 if (!acpi_noirq)
1523 x86_init.pci.init = pci_acpi_init;
1524
1525 return 0;
1526}
1527
1528static int __init parse_acpi(char *arg)
1529{
1530 if (!arg)
1531 return -EINVAL;
1532
1533 /* "acpi=off" disables both ACPI table parsing and interpreter */
1534 if (strcmp(arg, "off") == 0) {
1535 disable_acpi();
1536 }
1537 /* acpi=force to over-ride black-list */
1538 else if (strcmp(arg, "force") == 0) {
1539 acpi_force = 1;
1540 acpi_disabled = 0;
1541 }
1542 /* acpi=strict disables out-of-spec workarounds */
1543 else if (strcmp(arg, "strict") == 0) {
1544 acpi_strict = 1;
1545 }
1546 /* acpi=rsdt use RSDT instead of XSDT */
1547 else if (strcmp(arg, "rsdt") == 0) {
1548 acpi_gbl_do_not_use_xsdt = TRUE;
1549 }
1550 /* "acpi=noirq" disables ACPI interrupt routing */
1551 else if (strcmp(arg, "noirq") == 0) {
1552 acpi_noirq_set();
1553 }
1554 /* "acpi=copy_dsdt" copys DSDT */
1555 else if (strcmp(arg, "copy_dsdt") == 0) {
1556 acpi_gbl_copy_dsdt_locally = 1;
1557 }
1558 /* "acpi=nocmcff" disables FF mode for corrected errors */
1559 else if (strcmp(arg, "nocmcff") == 0) {
1560 acpi_disable_cmcff = 1;
1561 } else {
1562 /* Core will printk when we return error. */
1563 return -EINVAL;
1564 }
1565 return 0;
1566}
1567early_param("acpi", parse_acpi);
1568
1569/* FIXME: Using pci= for an ACPI parameter is a travesty. */
1570static int __init parse_pci(char *arg)
1571{
1572 if (arg && strcmp(arg, "noacpi") == 0)
1573 acpi_disable_pci();
1574 return 0;
1575}
1576early_param("pci", parse_pci);
1577
1578int __init acpi_mps_check(void)
1579{
1580#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1581/* mptable code is not built-in*/
1582 if (acpi_disabled || acpi_noirq) {
1583 printk(KERN_WARNING "MPS support code is not built-in.\n"
1584 "Using acpi=off or acpi=noirq or pci=noacpi "
1585 "may have problem\n");
1586 return 1;
1587 }
1588#endif
1589 return 0;
1590}
1591
1592#ifdef CONFIG_X86_IO_APIC
1593static int __init parse_acpi_skip_timer_override(char *arg)
1594{
1595 acpi_skip_timer_override = 1;
1596 return 0;
1597}
1598early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1599
1600static int __init parse_acpi_use_timer_override(char *arg)
1601{
1602 acpi_use_timer_override = 1;
1603 return 0;
1604}
1605early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1606#endif /* CONFIG_X86_IO_APIC */
1607
1608static int __init setup_acpi_sci(char *s)
1609{
1610 if (!s)
1611 return -EINVAL;
1612 if (!strcmp(s, "edge"))
1613 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1614 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1615 else if (!strcmp(s, "level"))
1616 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1617 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1618 else if (!strcmp(s, "high"))
1619 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1620 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1621 else if (!strcmp(s, "low"))
1622 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1623 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1624 else
1625 return -EINVAL;
1626 return 0;
1627}
1628early_param("acpi_sci", setup_acpi_sci);
1629
1630int __acpi_acquire_global_lock(unsigned int *lock)
1631{
1632 unsigned int old, new, val;
1633 do {
1634 old = *lock;
1635 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1636 val = cmpxchg(lock, old, new);
1637 } while (unlikely (val != old));
1638 return (new < 3) ? -1 : 0;
1639}
1640
1641int __acpi_release_global_lock(unsigned int *lock)
1642{
1643 unsigned int old, new, val;
1644 do {
1645 old = *lock;
1646 new = old & ~0x3;
1647 val = cmpxchg(lock, old, new);
1648 } while (unlikely (val != old));
1649 return old & 0x1;
1650}
1651
1652void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1653{
1654 e820_add_region(addr, size, E820_ACPI);
1655 update_e820();
1656}