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clk: mxs: imx28: decrease the frequency of ref_io1 for SSP2 and SSP3
[deliverable/linux.git] / arch / x86 / kernel / acpi / boot.c
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 static int __initdata acpi_force = 0;
48 u32 acpi_rsdt_forced;
49 int acpi_disabled;
50 EXPORT_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
63 int acpi_noirq; /* skip ACPI IRQ initialization */
64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
65 EXPORT_SYMBOL(acpi_pci_disabled);
66
67 int acpi_lapic;
68 int acpi_ioapic;
69 int acpi_strict;
70
71 u8 acpi_sci_flags __initdata;
72 int acpi_sci_override_gsi __initdata;
73 int acpi_skip_timer_override __initdata;
74 int acpi_use_timer_override __initdata;
75 int acpi_fix_pin2_polarity __initdata;
76
77 #ifdef CONFIG_X86_LOCAL_APIC
78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
79 #endif
80
81 #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 */
93 enum 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 */
100 static 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
104 static 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
127 static 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 */
155 char *__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 }
163 void __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
172 static 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
198 static 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
218 static int __init
219 acpi_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
253 static int __init
254 acpi_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
278 static int __init
279 acpi_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
296 static int __init
297 acpi_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
312 static int __init
313 acpi_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
331 static int __init
332 acpi_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
353 static int __init
354 acpi_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 */
374 static 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
404 static int __init
405 acpi_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 && intsrc->global_irq == 2) {
426 if (acpi_skip_timer_override) {
427 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
428 return 0;
429 }
430 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
431 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
432 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
433 }
434 }
435
436 mp_override_legacy_irq(intsrc->source_irq,
437 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
438 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
439 intsrc->global_irq);
440
441 return 0;
442 }
443
444 static int __init
445 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
446 {
447 struct acpi_madt_nmi_source *nmi_src = NULL;
448
449 nmi_src = (struct acpi_madt_nmi_source *)header;
450
451 if (BAD_MADT_ENTRY(nmi_src, end))
452 return -EINVAL;
453
454 acpi_table_print_madt_entry(header);
455
456 /* TBD: Support nimsrc entries? */
457
458 return 0;
459 }
460
461 #endif /* CONFIG_X86_IO_APIC */
462
463 /*
464 * acpi_pic_sci_set_trigger()
465 *
466 * use ELCR to set PIC-mode trigger type for SCI
467 *
468 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
469 * it may require Edge Trigger -- use "acpi_sci=edge"
470 *
471 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
472 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
473 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
474 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
475 */
476
477 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
478 {
479 unsigned int mask = 1 << irq;
480 unsigned int old, new;
481
482 /* Real old ELCR mask */
483 old = inb(0x4d0) | (inb(0x4d1) << 8);
484
485 /*
486 * If we use ACPI to set PCI IRQs, then we should clear ELCR
487 * since we will set it correctly as we enable the PCI irq
488 * routing.
489 */
490 new = acpi_noirq ? old : 0;
491
492 /*
493 * Update SCI information in the ELCR, it isn't in the PCI
494 * routing tables..
495 */
496 switch (trigger) {
497 case 1: /* Edge - clear */
498 new &= ~mask;
499 break;
500 case 3: /* Level - set */
501 new |= mask;
502 break;
503 }
504
505 if (old == new)
506 return;
507
508 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
509 outb(new, 0x4d0);
510 outb(new >> 8, 0x4d1);
511 }
512
513 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
514 {
515 *irq = gsi_to_irq(gsi);
516
517 #ifdef CONFIG_X86_IO_APIC
518 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
519 setup_IO_APIC_irq_extra(gsi);
520 #endif
521
522 return 0;
523 }
524 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
525
526 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
527 {
528 if (isa_irq >= 16)
529 return -1;
530 *gsi = irq_to_gsi(isa_irq);
531 return 0;
532 }
533
534 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
535 int trigger, int polarity)
536 {
537 #ifdef CONFIG_PCI
538 /*
539 * Make sure all (legacy) PCI IRQs are set as level-triggered.
540 */
541 if (trigger == ACPI_LEVEL_SENSITIVE)
542 eisa_set_level_irq(gsi);
543 #endif
544
545 return gsi;
546 }
547
548 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
549 int trigger, int polarity)
550 {
551 #ifdef CONFIG_X86_IO_APIC
552 gsi = mp_register_gsi(dev, gsi, trigger, polarity);
553 #endif
554
555 return gsi;
556 }
557
558 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
559 int trigger, int polarity) = acpi_register_gsi_pic;
560
561 /*
562 * success: return IRQ number (>=0)
563 * failure: return < 0
564 */
565 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
566 {
567 unsigned int irq;
568 unsigned int plat_gsi = gsi;
569
570 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
571 irq = gsi_to_irq(plat_gsi);
572
573 return irq;
574 }
575
576 void __init acpi_set_irq_model_pic(void)
577 {
578 acpi_irq_model = ACPI_IRQ_MODEL_PIC;
579 __acpi_register_gsi = acpi_register_gsi_pic;
580 acpi_ioapic = 0;
581 }
582
583 void __init acpi_set_irq_model_ioapic(void)
584 {
585 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
586 __acpi_register_gsi = acpi_register_gsi_ioapic;
587 acpi_ioapic = 1;
588 }
589
590 /*
591 * ACPI based hotplug support for CPU
592 */
593 #ifdef CONFIG_ACPI_HOTPLUG_CPU
594 #include <acpi/processor.h>
595
596 static void __cpuinit acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
597 {
598 #ifdef CONFIG_ACPI_NUMA
599 int nid;
600
601 nid = acpi_get_node(handle);
602 if (nid == -1 || !node_online(nid))
603 return;
604 set_apicid_to_node(physid, nid);
605 numa_set_node(cpu, nid);
606 #endif
607 }
608
609 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
610 {
611 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
612 union acpi_object *obj;
613 struct acpi_madt_local_apic *lapic;
614 cpumask_var_t tmp_map, new_map;
615 u8 physid;
616 int cpu;
617 int retval = -ENOMEM;
618
619 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
620 return -EINVAL;
621
622 if (!buffer.length || !buffer.pointer)
623 return -EINVAL;
624
625 obj = buffer.pointer;
626 if (obj->type != ACPI_TYPE_BUFFER ||
627 obj->buffer.length < sizeof(*lapic)) {
628 kfree(buffer.pointer);
629 return -EINVAL;
630 }
631
632 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
633
634 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
635 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
636 kfree(buffer.pointer);
637 return -EINVAL;
638 }
639
640 physid = lapic->id;
641
642 kfree(buffer.pointer);
643 buffer.length = ACPI_ALLOCATE_BUFFER;
644 buffer.pointer = NULL;
645 lapic = NULL;
646
647 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
648 goto out;
649
650 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
651 goto free_tmp_map;
652
653 cpumask_copy(tmp_map, cpu_present_mask);
654 acpi_register_lapic(physid, ACPI_MADT_ENABLED);
655
656 /*
657 * If mp_register_lapic successfully generates a new logical cpu
658 * number, then the following will get us exactly what was mapped
659 */
660 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
661 if (cpumask_empty(new_map)) {
662 printk ("Unable to map lapic to logical cpu number\n");
663 retval = -EINVAL;
664 goto free_new_map;
665 }
666
667 acpi_processor_set_pdc(handle);
668
669 cpu = cpumask_first(new_map);
670 acpi_map_cpu2node(handle, cpu, physid);
671
672 *pcpu = cpu;
673 retval = 0;
674
675 free_new_map:
676 free_cpumask_var(new_map);
677 free_tmp_map:
678 free_cpumask_var(tmp_map);
679 out:
680 return retval;
681 }
682
683 /* wrapper to silence section mismatch warning */
684 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
685 {
686 return _acpi_map_lsapic(handle, pcpu);
687 }
688 EXPORT_SYMBOL(acpi_map_lsapic);
689
690 int acpi_unmap_lsapic(int cpu)
691 {
692 per_cpu(x86_cpu_to_apicid, cpu) = -1;
693 set_cpu_present(cpu, false);
694 num_processors--;
695
696 return (0);
697 }
698
699 EXPORT_SYMBOL(acpi_unmap_lsapic);
700 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
701
702 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
703 {
704 /* TBD */
705 return -EINVAL;
706 }
707
708 EXPORT_SYMBOL(acpi_register_ioapic);
709
710 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
711 {
712 /* TBD */
713 return -EINVAL;
714 }
715
716 EXPORT_SYMBOL(acpi_unregister_ioapic);
717
718 static int __init acpi_parse_sbf(struct acpi_table_header *table)
719 {
720 struct acpi_table_boot *sb;
721
722 sb = (struct acpi_table_boot *)table;
723 if (!sb) {
724 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
725 return -ENODEV;
726 }
727
728 sbf_port = sb->cmos_index; /* Save CMOS port */
729
730 return 0;
731 }
732
733 #ifdef CONFIG_HPET_TIMER
734 #include <asm/hpet.h>
735
736 static struct __initdata resource *hpet_res;
737
738 static int __init acpi_parse_hpet(struct acpi_table_header *table)
739 {
740 struct acpi_table_hpet *hpet_tbl;
741
742 hpet_tbl = (struct acpi_table_hpet *)table;
743 if (!hpet_tbl) {
744 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
745 return -ENODEV;
746 }
747
748 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
749 printk(KERN_WARNING PREFIX "HPET timers must be located in "
750 "memory.\n");
751 return -1;
752 }
753
754 hpet_address = hpet_tbl->address.address;
755 hpet_blockid = hpet_tbl->sequence;
756
757 /*
758 * Some broken BIOSes advertise HPET at 0x0. We really do not
759 * want to allocate a resource there.
760 */
761 if (!hpet_address) {
762 printk(KERN_WARNING PREFIX
763 "HPET id: %#x base: %#lx is invalid\n",
764 hpet_tbl->id, hpet_address);
765 return 0;
766 }
767 #ifdef CONFIG_X86_64
768 /*
769 * Some even more broken BIOSes advertise HPET at
770 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
771 * some noise:
772 */
773 if (hpet_address == 0xfed0000000000000UL) {
774 if (!hpet_force_user) {
775 printk(KERN_WARNING PREFIX "HPET id: %#x "
776 "base: 0xfed0000000000000 is bogus\n "
777 "try hpet=force on the kernel command line to "
778 "fix it up to 0xfed00000.\n", hpet_tbl->id);
779 hpet_address = 0;
780 return 0;
781 }
782 printk(KERN_WARNING PREFIX
783 "HPET id: %#x base: 0xfed0000000000000 fixed up "
784 "to 0xfed00000.\n", hpet_tbl->id);
785 hpet_address >>= 32;
786 }
787 #endif
788 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
789 hpet_tbl->id, hpet_address);
790
791 /*
792 * Allocate and initialize the HPET firmware resource for adding into
793 * the resource tree during the lateinit timeframe.
794 */
795 #define HPET_RESOURCE_NAME_SIZE 9
796 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
797
798 hpet_res->name = (void *)&hpet_res[1];
799 hpet_res->flags = IORESOURCE_MEM;
800 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
801 hpet_tbl->sequence);
802
803 hpet_res->start = hpet_address;
804 hpet_res->end = hpet_address + (1 * 1024) - 1;
805
806 return 0;
807 }
808
809 /*
810 * hpet_insert_resource inserts the HPET resources used into the resource
811 * tree.
812 */
813 static __init int hpet_insert_resource(void)
814 {
815 if (!hpet_res)
816 return 1;
817
818 return insert_resource(&iomem_resource, hpet_res);
819 }
820
821 late_initcall(hpet_insert_resource);
822
823 #else
824 #define acpi_parse_hpet NULL
825 #endif
826
827 static int __init acpi_parse_fadt(struct acpi_table_header *table)
828 {
829
830 #ifdef CONFIG_X86_PM_TIMER
831 /* detect the location of the ACPI PM Timer */
832 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
833 /* FADT rev. 2 */
834 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
835 ACPI_ADR_SPACE_SYSTEM_IO)
836 return 0;
837
838 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
839 /*
840 * "X" fields are optional extensions to the original V1.0
841 * fields, so we must selectively expand V1.0 fields if the
842 * corresponding X field is zero.
843 */
844 if (!pmtmr_ioport)
845 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
846 } else {
847 /* FADT rev. 1 */
848 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
849 }
850 if (pmtmr_ioport)
851 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
852 pmtmr_ioport);
853 #endif
854 return 0;
855 }
856
857 #ifdef CONFIG_X86_LOCAL_APIC
858 /*
859 * Parse LAPIC entries in MADT
860 * returns 0 on success, < 0 on error
861 */
862
863 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
864 {
865 int count;
866
867 if (!cpu_has_apic)
868 return -ENODEV;
869
870 /*
871 * Note that the LAPIC address is obtained from the MADT (32-bit value)
872 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
873 */
874
875 count =
876 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
877 acpi_parse_lapic_addr_ovr, 0);
878 if (count < 0) {
879 printk(KERN_ERR PREFIX
880 "Error parsing LAPIC address override entry\n");
881 return count;
882 }
883
884 register_lapic_address(acpi_lapic_addr);
885
886 return count;
887 }
888
889 static int __init acpi_parse_madt_lapic_entries(void)
890 {
891 int count;
892 int x2count = 0;
893
894 if (!cpu_has_apic)
895 return -ENODEV;
896
897 /*
898 * Note that the LAPIC address is obtained from the MADT (32-bit value)
899 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
900 */
901
902 count =
903 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
904 acpi_parse_lapic_addr_ovr, 0);
905 if (count < 0) {
906 printk(KERN_ERR PREFIX
907 "Error parsing LAPIC address override entry\n");
908 return count;
909 }
910
911 register_lapic_address(acpi_lapic_addr);
912
913 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
914 acpi_parse_sapic, MAX_LOCAL_APIC);
915
916 if (!count) {
917 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
918 acpi_parse_x2apic, MAX_LOCAL_APIC);
919 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
920 acpi_parse_lapic, MAX_LOCAL_APIC);
921 }
922 if (!count && !x2count) {
923 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
924 /* TBD: Cleanup to allow fallback to MPS */
925 return -ENODEV;
926 } else if (count < 0 || x2count < 0) {
927 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
928 /* TBD: Cleanup to allow fallback to MPS */
929 return count;
930 }
931
932 x2count =
933 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
934 acpi_parse_x2apic_nmi, 0);
935 count =
936 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
937 if (count < 0 || x2count < 0) {
938 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
939 /* TBD: Cleanup to allow fallback to MPS */
940 return count;
941 }
942 return 0;
943 }
944 #endif /* CONFIG_X86_LOCAL_APIC */
945
946 #ifdef CONFIG_X86_IO_APIC
947 #define MP_ISA_BUS 0
948
949 #ifdef CONFIG_X86_ES7000
950 extern int es7000_plat;
951 #endif
952
953 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
954 {
955 int ioapic;
956 int pin;
957 struct mpc_intsrc mp_irq;
958
959 /*
960 * Convert 'gsi' to 'ioapic.pin'.
961 */
962 ioapic = mp_find_ioapic(gsi);
963 if (ioapic < 0)
964 return;
965 pin = mp_find_ioapic_pin(ioapic, gsi);
966
967 /*
968 * TBD: This check is for faulty timer entries, where the override
969 * erroneously sets the trigger to level, resulting in a HUGE
970 * increase of timer interrupts!
971 */
972 if ((bus_irq == 0) && (trigger == 3))
973 trigger = 1;
974
975 mp_irq.type = MP_INTSRC;
976 mp_irq.irqtype = mp_INT;
977 mp_irq.irqflag = (trigger << 2) | polarity;
978 mp_irq.srcbus = MP_ISA_BUS;
979 mp_irq.srcbusirq = bus_irq; /* IRQ */
980 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
981 mp_irq.dstirq = pin; /* INTIN# */
982
983 mp_save_irq(&mp_irq);
984
985 isa_irq_to_gsi[bus_irq] = gsi;
986 }
987
988 void __init mp_config_acpi_legacy_irqs(void)
989 {
990 int i;
991 struct mpc_intsrc mp_irq;
992
993 #ifdef CONFIG_EISA
994 /*
995 * Fabricate the legacy ISA bus (bus #31).
996 */
997 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
998 #endif
999 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1000 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1001
1002 #ifdef CONFIG_X86_ES7000
1003 /*
1004 * Older generations of ES7000 have no legacy identity mappings
1005 */
1006 if (es7000_plat == 1)
1007 return;
1008 #endif
1009
1010 /*
1011 * Use the default configuration for the IRQs 0-15. Unless
1012 * overridden by (MADT) interrupt source override entries.
1013 */
1014 for (i = 0; i < 16; i++) {
1015 int ioapic, pin;
1016 unsigned int dstapic;
1017 int idx;
1018 u32 gsi;
1019
1020 /* Locate the gsi that irq i maps to. */
1021 if (acpi_isa_irq_to_gsi(i, &gsi))
1022 continue;
1023
1024 /*
1025 * Locate the IOAPIC that manages the ISA IRQ.
1026 */
1027 ioapic = mp_find_ioapic(gsi);
1028 if (ioapic < 0)
1029 continue;
1030 pin = mp_find_ioapic_pin(ioapic, gsi);
1031 dstapic = mpc_ioapic_id(ioapic);
1032
1033 for (idx = 0; idx < mp_irq_entries; idx++) {
1034 struct mpc_intsrc *irq = mp_irqs + idx;
1035
1036 /* Do we already have a mapping for this ISA IRQ? */
1037 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1038 break;
1039
1040 /* Do we already have a mapping for this IOAPIC pin */
1041 if (irq->dstapic == dstapic && irq->dstirq == pin)
1042 break;
1043 }
1044
1045 if (idx != mp_irq_entries) {
1046 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1047 continue; /* IRQ already used */
1048 }
1049
1050 mp_irq.type = MP_INTSRC;
1051 mp_irq.irqflag = 0; /* Conforming */
1052 mp_irq.srcbus = MP_ISA_BUS;
1053 mp_irq.dstapic = dstapic;
1054 mp_irq.irqtype = mp_INT;
1055 mp_irq.srcbusirq = i; /* Identity mapped */
1056 mp_irq.dstirq = pin;
1057
1058 mp_save_irq(&mp_irq);
1059 }
1060 }
1061
1062 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1063 int polarity)
1064 {
1065 #ifdef CONFIG_X86_MPPARSE
1066 struct mpc_intsrc mp_irq;
1067 struct pci_dev *pdev;
1068 unsigned char number;
1069 unsigned int devfn;
1070 int ioapic;
1071 u8 pin;
1072
1073 if (!acpi_ioapic)
1074 return 0;
1075 if (!dev)
1076 return 0;
1077 if (dev->bus != &pci_bus_type)
1078 return 0;
1079
1080 pdev = to_pci_dev(dev);
1081 number = pdev->bus->number;
1082 devfn = pdev->devfn;
1083 pin = pdev->pin;
1084 /* print the entry should happen on mptable identically */
1085 mp_irq.type = MP_INTSRC;
1086 mp_irq.irqtype = mp_INT;
1087 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1088 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1089 mp_irq.srcbus = number;
1090 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1091 ioapic = mp_find_ioapic(gsi);
1092 mp_irq.dstapic = mpc_ioapic_id(ioapic);
1093 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1094
1095 mp_save_irq(&mp_irq);
1096 #endif
1097 return 0;
1098 }
1099
1100 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1101 {
1102 int ioapic;
1103 int ioapic_pin;
1104 struct io_apic_irq_attr irq_attr;
1105
1106 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1107 return gsi;
1108
1109 /* Don't set up the ACPI SCI because it's already set up */
1110 if (acpi_gbl_FADT.sci_interrupt == gsi)
1111 return gsi;
1112
1113 ioapic = mp_find_ioapic(gsi);
1114 if (ioapic < 0) {
1115 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1116 return gsi;
1117 }
1118
1119 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1120
1121 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1122 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1123 "%d-%d\n", mpc_ioapic_id(ioapic),
1124 ioapic_pin);
1125 return gsi;
1126 }
1127
1128 if (enable_update_mptable)
1129 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1130
1131 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1132 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1133 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1134 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1135
1136 return gsi;
1137 }
1138
1139 /*
1140 * Parse IOAPIC related entries in MADT
1141 * returns 0 on success, < 0 on error
1142 */
1143 static int __init acpi_parse_madt_ioapic_entries(void)
1144 {
1145 int count;
1146
1147 /*
1148 * ACPI interpreter is required to complete interrupt setup,
1149 * so if it is off, don't enumerate the io-apics with ACPI.
1150 * If MPS is present, it will handle them,
1151 * otherwise the system will stay in PIC mode
1152 */
1153 if (acpi_disabled || acpi_noirq)
1154 return -ENODEV;
1155
1156 if (!cpu_has_apic)
1157 return -ENODEV;
1158
1159 /*
1160 * if "noapic" boot option, don't look for IO-APICs
1161 */
1162 if (skip_ioapic_setup) {
1163 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1164 "due to 'noapic' option.\n");
1165 return -ENODEV;
1166 }
1167
1168 count =
1169 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1170 MAX_IO_APICS);
1171 if (!count) {
1172 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1173 return -ENODEV;
1174 } else if (count < 0) {
1175 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1176 return count;
1177 }
1178
1179 count =
1180 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1181 nr_irqs);
1182 if (count < 0) {
1183 printk(KERN_ERR PREFIX
1184 "Error parsing interrupt source overrides entry\n");
1185 /* TBD: Cleanup to allow fallback to MPS */
1186 return count;
1187 }
1188
1189 /*
1190 * If BIOS did not supply an INT_SRC_OVR for the SCI
1191 * pretend we got one so we can set the SCI flags.
1192 */
1193 if (!acpi_sci_override_gsi)
1194 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1195 acpi_gbl_FADT.sci_interrupt);
1196
1197 /* Fill in identity legacy mappings where no override */
1198 mp_config_acpi_legacy_irqs();
1199
1200 count =
1201 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1202 nr_irqs);
1203 if (count < 0) {
1204 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1205 /* TBD: Cleanup to allow fallback to MPS */
1206 return count;
1207 }
1208
1209 return 0;
1210 }
1211 #else
1212 static inline int acpi_parse_madt_ioapic_entries(void)
1213 {
1214 return -1;
1215 }
1216 #endif /* !CONFIG_X86_IO_APIC */
1217
1218 static void __init early_acpi_process_madt(void)
1219 {
1220 #ifdef CONFIG_X86_LOCAL_APIC
1221 int error;
1222
1223 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1224
1225 /*
1226 * Parse MADT LAPIC entries
1227 */
1228 error = early_acpi_parse_madt_lapic_addr_ovr();
1229 if (!error) {
1230 acpi_lapic = 1;
1231 smp_found_config = 1;
1232 }
1233 if (error == -EINVAL) {
1234 /*
1235 * Dell Precision Workstation 410, 610 come here.
1236 */
1237 printk(KERN_ERR PREFIX
1238 "Invalid BIOS MADT, disabling ACPI\n");
1239 disable_acpi();
1240 }
1241 }
1242 #endif
1243 }
1244
1245 static void __init acpi_process_madt(void)
1246 {
1247 #ifdef CONFIG_X86_LOCAL_APIC
1248 int error;
1249
1250 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1251
1252 /*
1253 * Parse MADT LAPIC entries
1254 */
1255 error = acpi_parse_madt_lapic_entries();
1256 if (!error) {
1257 acpi_lapic = 1;
1258
1259 /*
1260 * Parse MADT IO-APIC entries
1261 */
1262 error = acpi_parse_madt_ioapic_entries();
1263 if (!error) {
1264 acpi_set_irq_model_ioapic();
1265
1266 smp_found_config = 1;
1267 }
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 } else {
1278 /*
1279 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1280 * In the event an MPS table was found, forget it.
1281 * Boot with "acpi=off" to use MPS on such a system.
1282 */
1283 if (smp_found_config) {
1284 printk(KERN_WARNING PREFIX
1285 "No APIC-table, disabling MPS\n");
1286 smp_found_config = 0;
1287 }
1288 }
1289
1290 /*
1291 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1292 * processors, where MPS only supports physical.
1293 */
1294 if (acpi_lapic && acpi_ioapic)
1295 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1296 "information\n");
1297 else if (acpi_lapic)
1298 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1299 "configuration information\n");
1300 #endif
1301 return;
1302 }
1303
1304 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1305 {
1306 if (!acpi_force) {
1307 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1308 d->ident);
1309 acpi_noirq_set();
1310 }
1311 return 0;
1312 }
1313
1314 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1315 {
1316 if (!acpi_force) {
1317 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1318 d->ident);
1319 acpi_disable_pci();
1320 }
1321 return 0;
1322 }
1323
1324 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1325 {
1326 if (!acpi_force) {
1327 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1328 disable_acpi();
1329 } else {
1330 printk(KERN_NOTICE
1331 "Warning: DMI blacklist says broken, but acpi forced\n");
1332 }
1333 return 0;
1334 }
1335
1336 /*
1337 * Force ignoring BIOS IRQ0 pin2 override
1338 */
1339 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1340 {
1341 /*
1342 * The ati_ixp4x0_rev() early PCI quirk should have set
1343 * the acpi_skip_timer_override flag already:
1344 */
1345 if (!acpi_skip_timer_override) {
1346 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1347 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1348 d->ident);
1349 acpi_skip_timer_override = 1;
1350 }
1351 return 0;
1352 }
1353
1354 /*
1355 * If your system is blacklisted here, but you find that acpi=force
1356 * works for you, please contact linux-acpi@vger.kernel.org
1357 */
1358 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1359 /*
1360 * Boxes that need ACPI disabled
1361 */
1362 {
1363 .callback = dmi_disable_acpi,
1364 .ident = "IBM Thinkpad",
1365 .matches = {
1366 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1367 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1368 },
1369 },
1370
1371 /*
1372 * Boxes that need ACPI PCI IRQ routing disabled
1373 */
1374 {
1375 .callback = disable_acpi_irq,
1376 .ident = "ASUS A7V",
1377 .matches = {
1378 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1379 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1380 /* newer BIOS, Revision 1011, does work */
1381 DMI_MATCH(DMI_BIOS_VERSION,
1382 "ASUS A7V ACPI BIOS Revision 1007"),
1383 },
1384 },
1385 {
1386 /*
1387 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1388 * for LPC bridge, which is needed for the PCI
1389 * interrupt links to work. DSDT fix is in bug 5966.
1390 * 2645, 2646 model numbers are shared with 600/600E/600X
1391 */
1392 .callback = disable_acpi_irq,
1393 .ident = "IBM Thinkpad 600 Series 2645",
1394 .matches = {
1395 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1396 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1397 },
1398 },
1399 {
1400 .callback = disable_acpi_irq,
1401 .ident = "IBM Thinkpad 600 Series 2646",
1402 .matches = {
1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1404 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1405 },
1406 },
1407 /*
1408 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1409 */
1410 { /* _BBN 0 bug */
1411 .callback = disable_acpi_pci,
1412 .ident = "ASUS PR-DLS",
1413 .matches = {
1414 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1415 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1416 DMI_MATCH(DMI_BIOS_VERSION,
1417 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1418 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1419 },
1420 },
1421 {
1422 .callback = disable_acpi_pci,
1423 .ident = "Acer TravelMate 36x Laptop",
1424 .matches = {
1425 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1426 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1427 },
1428 },
1429 {}
1430 };
1431
1432 /* second table for DMI checks that should run after early-quirks */
1433 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1434 /*
1435 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1436 * which includes some code which overrides all temperature
1437 * trip points to 16C if the INTIN2 input of the I/O APIC
1438 * is enabled. This input is incorrectly designated the
1439 * ISA IRQ 0 via an interrupt source override even though
1440 * it is wired to the output of the master 8259A and INTIN0
1441 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1442 * override in that cases.
1443 */
1444 {
1445 .callback = dmi_ignore_irq0_timer_override,
1446 .ident = "HP nx6115 laptop",
1447 .matches = {
1448 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1449 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1450 },
1451 },
1452 {
1453 .callback = dmi_ignore_irq0_timer_override,
1454 .ident = "HP NX6125 laptop",
1455 .matches = {
1456 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1457 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1458 },
1459 },
1460 {
1461 .callback = dmi_ignore_irq0_timer_override,
1462 .ident = "HP NX6325 laptop",
1463 .matches = {
1464 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1465 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1466 },
1467 },
1468 {
1469 .callback = dmi_ignore_irq0_timer_override,
1470 .ident = "HP 6715b laptop",
1471 .matches = {
1472 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1473 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1474 },
1475 },
1476 {}
1477 };
1478
1479 /*
1480 * acpi_boot_table_init() and acpi_boot_init()
1481 * called from setup_arch(), always.
1482 * 1. checksums all tables
1483 * 2. enumerates lapics
1484 * 3. enumerates io-apics
1485 *
1486 * acpi_table_init() is separate to allow reading SRAT without
1487 * other side effects.
1488 *
1489 * side effects of acpi_boot_init:
1490 * acpi_lapic = 1 if LAPIC found
1491 * acpi_ioapic = 1 if IOAPIC found
1492 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1493 * if acpi_blacklisted() acpi_disabled = 1;
1494 * acpi_irq_model=...
1495 * ...
1496 */
1497
1498 void __init acpi_boot_table_init(void)
1499 {
1500 dmi_check_system(acpi_dmi_table);
1501
1502 /*
1503 * If acpi_disabled, bail out
1504 */
1505 if (acpi_disabled)
1506 return;
1507
1508 /*
1509 * Initialize the ACPI boot-time table parser.
1510 */
1511 if (acpi_table_init()) {
1512 disable_acpi();
1513 return;
1514 }
1515
1516 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1517
1518 /*
1519 * blacklist may disable ACPI entirely
1520 */
1521 if (acpi_blacklisted()) {
1522 if (acpi_force) {
1523 printk(KERN_WARNING PREFIX "acpi=force override\n");
1524 } else {
1525 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1526 disable_acpi();
1527 return;
1528 }
1529 }
1530 }
1531
1532 int __init early_acpi_boot_init(void)
1533 {
1534 /*
1535 * If acpi_disabled, bail out
1536 */
1537 if (acpi_disabled)
1538 return 1;
1539
1540 /*
1541 * Process the Multiple APIC Description Table (MADT), if present
1542 */
1543 early_acpi_process_madt();
1544
1545 return 0;
1546 }
1547
1548 int __init acpi_boot_init(void)
1549 {
1550 /* those are executed after early-quirks are executed */
1551 dmi_check_system(acpi_dmi_table_late);
1552
1553 /*
1554 * If acpi_disabled, bail out
1555 */
1556 if (acpi_disabled)
1557 return 1;
1558
1559 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1560
1561 /*
1562 * set sci_int and PM timer address
1563 */
1564 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1565
1566 /*
1567 * Process the Multiple APIC Description Table (MADT), if present
1568 */
1569 acpi_process_madt();
1570
1571 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1572
1573 if (!acpi_noirq)
1574 x86_init.pci.init = pci_acpi_init;
1575
1576 return 0;
1577 }
1578
1579 static int __init parse_acpi(char *arg)
1580 {
1581 if (!arg)
1582 return -EINVAL;
1583
1584 /* "acpi=off" disables both ACPI table parsing and interpreter */
1585 if (strcmp(arg, "off") == 0) {
1586 disable_acpi();
1587 }
1588 /* acpi=force to over-ride black-list */
1589 else if (strcmp(arg, "force") == 0) {
1590 acpi_force = 1;
1591 acpi_disabled = 0;
1592 }
1593 /* acpi=strict disables out-of-spec workarounds */
1594 else if (strcmp(arg, "strict") == 0) {
1595 acpi_strict = 1;
1596 }
1597 /* acpi=rsdt use RSDT instead of XSDT */
1598 else if (strcmp(arg, "rsdt") == 0) {
1599 acpi_rsdt_forced = 1;
1600 }
1601 /* "acpi=noirq" disables ACPI interrupt routing */
1602 else if (strcmp(arg, "noirq") == 0) {
1603 acpi_noirq_set();
1604 }
1605 /* "acpi=copy_dsdt" copys DSDT */
1606 else if (strcmp(arg, "copy_dsdt") == 0) {
1607 acpi_gbl_copy_dsdt_locally = 1;
1608 } else {
1609 /* Core will printk when we return error. */
1610 return -EINVAL;
1611 }
1612 return 0;
1613 }
1614 early_param("acpi", parse_acpi);
1615
1616 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1617 static int __init parse_pci(char *arg)
1618 {
1619 if (arg && strcmp(arg, "noacpi") == 0)
1620 acpi_disable_pci();
1621 return 0;
1622 }
1623 early_param("pci", parse_pci);
1624
1625 int __init acpi_mps_check(void)
1626 {
1627 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1628 /* mptable code is not built-in*/
1629 if (acpi_disabled || acpi_noirq) {
1630 printk(KERN_WARNING "MPS support code is not built-in.\n"
1631 "Using acpi=off or acpi=noirq or pci=noacpi "
1632 "may have problem\n");
1633 return 1;
1634 }
1635 #endif
1636 return 0;
1637 }
1638
1639 #ifdef CONFIG_X86_IO_APIC
1640 static int __init parse_acpi_skip_timer_override(char *arg)
1641 {
1642 acpi_skip_timer_override = 1;
1643 return 0;
1644 }
1645 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1646
1647 static int __init parse_acpi_use_timer_override(char *arg)
1648 {
1649 acpi_use_timer_override = 1;
1650 return 0;
1651 }
1652 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1653 #endif /* CONFIG_X86_IO_APIC */
1654
1655 static int __init setup_acpi_sci(char *s)
1656 {
1657 if (!s)
1658 return -EINVAL;
1659 if (!strcmp(s, "edge"))
1660 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1661 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1662 else if (!strcmp(s, "level"))
1663 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1664 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1665 else if (!strcmp(s, "high"))
1666 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1667 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1668 else if (!strcmp(s, "low"))
1669 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1670 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1671 else
1672 return -EINVAL;
1673 return 0;
1674 }
1675 early_param("acpi_sci", setup_acpi_sci);
1676
1677 int __acpi_acquire_global_lock(unsigned int *lock)
1678 {
1679 unsigned int old, new, val;
1680 do {
1681 old = *lock;
1682 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1683 val = cmpxchg(lock, old, new);
1684 } while (unlikely (val != old));
1685 return (new < 3) ? -1 : 0;
1686 }
1687
1688 int __acpi_release_global_lock(unsigned int *lock)
1689 {
1690 unsigned int old, new, val;
1691 do {
1692 old = *lock;
1693 new = old & ~0x3;
1694 val = cmpxchg(lock, old, new);
1695 } while (unlikely (val != old));
1696 return old & 0x1;
1697 }
Linux kernel - Deliverables
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