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Merge branches 'release' and 'wmi-2.6.25' into release
[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/bootmem.h>
35 #include <linux/ioport.h>
36
37 #include <asm/pgtable.h>
38 #include <asm/io_apic.h>
39 #include <asm/apic.h>
40 #include <asm/io.h>
41 #include <asm/mpspec.h>
42
43 static int __initdata acpi_force = 0;
44
45 #ifdef CONFIG_ACPI
46 int acpi_disabled = 0;
47 #else
48 int acpi_disabled = 1;
49 #endif
50 EXPORT_SYMBOL(acpi_disabled);
51
52 #ifdef CONFIG_X86_64
53
54 #include <asm/proto.h>
55
56 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
57
58
59 #else /* X86 */
60
61 #ifdef CONFIG_X86_LOCAL_APIC
62 #include <mach_apic.h>
63 #include <mach_mpparse.h>
64 #endif /* CONFIG_X86_LOCAL_APIC */
65
66 #endif /* X86 */
67
68 #define BAD_MADT_ENTRY(entry, end) ( \
69 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
70 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
71
72 #define PREFIX "ACPI: "
73
74 int acpi_noirq; /* skip ACPI IRQ initialization */
75 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
76 int acpi_ht __initdata = 1; /* enable HT */
77
78 int acpi_lapic;
79 int acpi_ioapic;
80 int acpi_strict;
81 EXPORT_SYMBOL(acpi_strict);
82
83 u8 acpi_sci_flags __initdata;
84 int acpi_sci_override_gsi __initdata;
85 int acpi_skip_timer_override __initdata;
86 int acpi_use_timer_override __initdata;
87
88 #ifdef CONFIG_X86_LOCAL_APIC
89 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
90 #endif
91
92 #ifndef __HAVE_ARCH_CMPXCHG
93 #warning ACPI uses CMPXCHG, i486 and later hardware
94 #endif
95
96 /* --------------------------------------------------------------------------
97 Boot-time Configuration
98 -------------------------------------------------------------------------- */
99
100 /*
101 * The default interrupt routing model is PIC (8259). This gets
102 * overridden if IOAPICs are enumerated (below).
103 */
104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
105
106 #ifdef CONFIG_X86_64
107
108 /* rely on all ACPI tables being in the direct mapping */
109 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
110 {
111 if (!phys_addr || !size)
112 return NULL;
113
114 if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
115 return __va(phys_addr);
116
117 return NULL;
118 }
119
120 #else
121
122 /*
123 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
124 * to map the target physical address. The problem is that set_fixmap()
125 * provides a single page, and it is possible that the page is not
126 * sufficient.
127 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
128 * i.e. until the next __va_range() call.
129 *
130 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
131 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
132 * count idx down while incrementing the phys address.
133 */
134 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
135 {
136 unsigned long base, offset, mapped_size;
137 int idx;
138
139 if (phys + size < 8 * 1024 * 1024)
140 return __va(phys);
141
142 offset = phys & (PAGE_SIZE - 1);
143 mapped_size = PAGE_SIZE - offset;
144 set_fixmap(FIX_ACPI_END, phys);
145 base = fix_to_virt(FIX_ACPI_END);
146
147 /*
148 * Most cases can be covered by the below.
149 */
150 idx = FIX_ACPI_END;
151 while (mapped_size < size) {
152 if (--idx < FIX_ACPI_BEGIN)
153 return NULL; /* cannot handle this */
154 phys += PAGE_SIZE;
155 set_fixmap(idx, phys);
156 mapped_size += PAGE_SIZE;
157 }
158
159 return ((unsigned char *)base + offset);
160 }
161 #endif
162
163 #ifdef CONFIG_PCI_MMCONFIG
164 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
165 struct acpi_mcfg_allocation *pci_mmcfg_config;
166 int pci_mmcfg_config_num;
167
168 int __init acpi_parse_mcfg(struct acpi_table_header *header)
169 {
170 struct acpi_table_mcfg *mcfg;
171 unsigned long i;
172 int config_size;
173
174 if (!header)
175 return -EINVAL;
176
177 mcfg = (struct acpi_table_mcfg *)header;
178
179 /* how many config structures do we have */
180 pci_mmcfg_config_num = 0;
181 i = header->length - sizeof(struct acpi_table_mcfg);
182 while (i >= sizeof(struct acpi_mcfg_allocation)) {
183 ++pci_mmcfg_config_num;
184 i -= sizeof(struct acpi_mcfg_allocation);
185 };
186 if (pci_mmcfg_config_num == 0) {
187 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
188 return -ENODEV;
189 }
190
191 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
192 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
193 if (!pci_mmcfg_config) {
194 printk(KERN_WARNING PREFIX
195 "No memory for MCFG config tables\n");
196 return -ENOMEM;
197 }
198
199 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
200 for (i = 0; i < pci_mmcfg_config_num; ++i) {
201 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
202 printk(KERN_ERR PREFIX
203 "MMCONFIG not in low 4GB of memory\n");
204 kfree(pci_mmcfg_config);
205 pci_mmcfg_config_num = 0;
206 return -ENODEV;
207 }
208 }
209
210 return 0;
211 }
212 #endif /* CONFIG_PCI_MMCONFIG */
213
214 #ifdef CONFIG_X86_LOCAL_APIC
215 static int __init acpi_parse_madt(struct acpi_table_header *table)
216 {
217 struct acpi_table_madt *madt = NULL;
218
219 if (!cpu_has_apic)
220 return -EINVAL;
221
222 madt = (struct acpi_table_madt *)table;
223 if (!madt) {
224 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
225 return -ENODEV;
226 }
227
228 if (madt->address) {
229 acpi_lapic_addr = (u64) madt->address;
230
231 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
232 madt->address);
233 }
234
235 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
236
237 return 0;
238 }
239
240 static int __init
241 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
242 {
243 struct acpi_madt_local_apic *processor = NULL;
244
245 processor = (struct acpi_madt_local_apic *)header;
246
247 if (BAD_MADT_ENTRY(processor, end))
248 return -EINVAL;
249
250 acpi_table_print_madt_entry(header);
251
252 /*
253 * We need to register disabled CPU as well to permit
254 * counting disabled CPUs. This allows us to size
255 * cpus_possible_map more accurately, to permit
256 * to not preallocating memory for all NR_CPUS
257 * when we use CPU hotplug.
258 */
259 mp_register_lapic(processor->id, /* APIC ID */
260 processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */
261
262 return 0;
263 }
264
265 static int __init
266 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
267 const unsigned long end)
268 {
269 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
270
271 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
272
273 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
274 return -EINVAL;
275
276 acpi_lapic_addr = lapic_addr_ovr->address;
277
278 return 0;
279 }
280
281 static int __init
282 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
283 {
284 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
285
286 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
287
288 if (BAD_MADT_ENTRY(lapic_nmi, end))
289 return -EINVAL;
290
291 acpi_table_print_madt_entry(header);
292
293 if (lapic_nmi->lint != 1)
294 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
295
296 return 0;
297 }
298
299 #endif /*CONFIG_X86_LOCAL_APIC */
300
301 #ifdef CONFIG_X86_IO_APIC
302
303 static int __init
304 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
305 {
306 struct acpi_madt_io_apic *ioapic = NULL;
307
308 ioapic = (struct acpi_madt_io_apic *)header;
309
310 if (BAD_MADT_ENTRY(ioapic, end))
311 return -EINVAL;
312
313 acpi_table_print_madt_entry(header);
314
315 mp_register_ioapic(ioapic->id,
316 ioapic->address, ioapic->global_irq_base);
317
318 return 0;
319 }
320
321 /*
322 * Parse Interrupt Source Override for the ACPI SCI
323 */
324 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
325 {
326 if (trigger == 0) /* compatible SCI trigger is level */
327 trigger = 3;
328
329 if (polarity == 0) /* compatible SCI polarity is low */
330 polarity = 3;
331
332 /* Command-line over-ride via acpi_sci= */
333 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
334 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
335
336 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
337 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
338
339 /*
340 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
341 * If GSI is < 16, this will update its flags,
342 * else it will create a new mp_irqs[] entry.
343 */
344 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
345
346 /*
347 * stash over-ride to indicate we've been here
348 * and for later update of acpi_gbl_FADT
349 */
350 acpi_sci_override_gsi = gsi;
351 return;
352 }
353
354 static int __init
355 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
356 const unsigned long end)
357 {
358 struct acpi_madt_interrupt_override *intsrc = NULL;
359
360 intsrc = (struct acpi_madt_interrupt_override *)header;
361
362 if (BAD_MADT_ENTRY(intsrc, end))
363 return -EINVAL;
364
365 acpi_table_print_madt_entry(header);
366
367 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
368 acpi_sci_ioapic_setup(intsrc->global_irq,
369 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
370 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
371 return 0;
372 }
373
374 if (acpi_skip_timer_override &&
375 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
376 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
377 return 0;
378 }
379
380 mp_override_legacy_irq(intsrc->source_irq,
381 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
382 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
383 intsrc->global_irq);
384
385 return 0;
386 }
387
388 static int __init
389 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
390 {
391 struct acpi_madt_nmi_source *nmi_src = NULL;
392
393 nmi_src = (struct acpi_madt_nmi_source *)header;
394
395 if (BAD_MADT_ENTRY(nmi_src, end))
396 return -EINVAL;
397
398 acpi_table_print_madt_entry(header);
399
400 /* TBD: Support nimsrc entries? */
401
402 return 0;
403 }
404
405 #endif /* CONFIG_X86_IO_APIC */
406
407 /*
408 * acpi_pic_sci_set_trigger()
409 *
410 * use ELCR to set PIC-mode trigger type for SCI
411 *
412 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
413 * it may require Edge Trigger -- use "acpi_sci=edge"
414 *
415 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
416 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
417 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
418 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
419 */
420
421 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
422 {
423 unsigned int mask = 1 << irq;
424 unsigned int old, new;
425
426 /* Real old ELCR mask */
427 old = inb(0x4d0) | (inb(0x4d1) << 8);
428
429 /*
430 * If we use ACPI to set PCI IRQs, then we should clear ELCR
431 * since we will set it correctly as we enable the PCI irq
432 * routing.
433 */
434 new = acpi_noirq ? old : 0;
435
436 /*
437 * Update SCI information in the ELCR, it isn't in the PCI
438 * routing tables..
439 */
440 switch (trigger) {
441 case 1: /* Edge - clear */
442 new &= ~mask;
443 break;
444 case 3: /* Level - set */
445 new |= mask;
446 break;
447 }
448
449 if (old == new)
450 return;
451
452 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
453 outb(new, 0x4d0);
454 outb(new >> 8, 0x4d1);
455 }
456
457 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
458 {
459 *irq = gsi;
460 return 0;
461 }
462
463 /*
464 * success: return IRQ number (>=0)
465 * failure: return < 0
466 */
467 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
468 {
469 unsigned int irq;
470 unsigned int plat_gsi = gsi;
471
472 #ifdef CONFIG_PCI
473 /*
474 * Make sure all (legacy) PCI IRQs are set as level-triggered.
475 */
476 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
477 extern void eisa_set_level_irq(unsigned int irq);
478
479 if (triggering == ACPI_LEVEL_SENSITIVE)
480 eisa_set_level_irq(gsi);
481 }
482 #endif
483
484 #ifdef CONFIG_X86_IO_APIC
485 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
486 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
487 }
488 #endif
489 acpi_gsi_to_irq(plat_gsi, &irq);
490 return irq;
491 }
492
493 EXPORT_SYMBOL(acpi_register_gsi);
494
495 /*
496 * ACPI based hotplug support for CPU
497 */
498 #ifdef CONFIG_ACPI_HOTPLUG_CPU
499
500 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
501 {
502 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
503 union acpi_object *obj;
504 struct acpi_madt_local_apic *lapic;
505 cpumask_t tmp_map, new_map;
506 u8 physid;
507 int cpu;
508
509 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
510 return -EINVAL;
511
512 if (!buffer.length || !buffer.pointer)
513 return -EINVAL;
514
515 obj = buffer.pointer;
516 if (obj->type != ACPI_TYPE_BUFFER ||
517 obj->buffer.length < sizeof(*lapic)) {
518 kfree(buffer.pointer);
519 return -EINVAL;
520 }
521
522 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
523
524 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
525 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
526 kfree(buffer.pointer);
527 return -EINVAL;
528 }
529
530 physid = lapic->id;
531
532 kfree(buffer.pointer);
533 buffer.length = ACPI_ALLOCATE_BUFFER;
534 buffer.pointer = NULL;
535
536 tmp_map = cpu_present_map;
537 mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
538
539 /*
540 * If mp_register_lapic successfully generates a new logical cpu
541 * number, then the following will get us exactly what was mapped
542 */
543 cpus_andnot(new_map, cpu_present_map, tmp_map);
544 if (cpus_empty(new_map)) {
545 printk ("Unable to map lapic to logical cpu number\n");
546 return -EINVAL;
547 }
548
549 cpu = first_cpu(new_map);
550
551 *pcpu = cpu;
552 return 0;
553 }
554
555 /* wrapper to silence section mismatch warning */
556 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
557 {
558 return _acpi_map_lsapic(handle, pcpu);
559 }
560 EXPORT_SYMBOL(acpi_map_lsapic);
561
562 int acpi_unmap_lsapic(int cpu)
563 {
564 per_cpu(x86_cpu_to_apicid, cpu) = -1;
565 cpu_clear(cpu, cpu_present_map);
566 num_processors--;
567
568 return (0);
569 }
570
571 EXPORT_SYMBOL(acpi_unmap_lsapic);
572 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
573
574 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
575 {
576 /* TBD */
577 return -EINVAL;
578 }
579
580 EXPORT_SYMBOL(acpi_register_ioapic);
581
582 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
583 {
584 /* TBD */
585 return -EINVAL;
586 }
587
588 EXPORT_SYMBOL(acpi_unregister_ioapic);
589
590 static int __init acpi_parse_sbf(struct acpi_table_header *table)
591 {
592 struct acpi_table_boot *sb;
593
594 sb = (struct acpi_table_boot *)table;
595 if (!sb) {
596 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
597 return -ENODEV;
598 }
599
600 sbf_port = sb->cmos_index; /* Save CMOS port */
601
602 return 0;
603 }
604
605 #ifdef CONFIG_HPET_TIMER
606 #include <asm/hpet.h>
607
608 static struct __initdata resource *hpet_res;
609
610 static int __init acpi_parse_hpet(struct acpi_table_header *table)
611 {
612 struct acpi_table_hpet *hpet_tbl;
613
614 hpet_tbl = (struct acpi_table_hpet *)table;
615 if (!hpet_tbl) {
616 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
617 return -ENODEV;
618 }
619
620 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
621 printk(KERN_WARNING PREFIX "HPET timers must be located in "
622 "memory.\n");
623 return -1;
624 }
625
626 hpet_address = hpet_tbl->address.address;
627
628 /*
629 * Some broken BIOSes advertise HPET at 0x0. We really do not
630 * want to allocate a resource there.
631 */
632 if (!hpet_address) {
633 printk(KERN_WARNING PREFIX
634 "HPET id: %#x base: %#lx is invalid\n",
635 hpet_tbl->id, hpet_address);
636 return 0;
637 }
638 #ifdef CONFIG_X86_64
639 /*
640 * Some even more broken BIOSes advertise HPET at
641 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
642 * some noise:
643 */
644 if (hpet_address == 0xfed0000000000000UL) {
645 if (!hpet_force_user) {
646 printk(KERN_WARNING PREFIX "HPET id: %#x "
647 "base: 0xfed0000000000000 is bogus\n "
648 "try hpet=force on the kernel command line to "
649 "fix it up to 0xfed00000.\n", hpet_tbl->id);
650 hpet_address = 0;
651 return 0;
652 }
653 printk(KERN_WARNING PREFIX
654 "HPET id: %#x base: 0xfed0000000000000 fixed up "
655 "to 0xfed00000.\n", hpet_tbl->id);
656 hpet_address >>= 32;
657 }
658 #endif
659 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
660 hpet_tbl->id, hpet_address);
661
662 /*
663 * Allocate and initialize the HPET firmware resource for adding into
664 * the resource tree during the lateinit timeframe.
665 */
666 #define HPET_RESOURCE_NAME_SIZE 9
667 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
668
669 if (!hpet_res)
670 return 0;
671
672 memset(hpet_res, 0, sizeof(*hpet_res));
673 hpet_res->name = (void *)&hpet_res[1];
674 hpet_res->flags = IORESOURCE_MEM;
675 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
676 hpet_tbl->sequence);
677
678 hpet_res->start = hpet_address;
679 hpet_res->end = hpet_address + (1 * 1024) - 1;
680
681 return 0;
682 }
683
684 /*
685 * hpet_insert_resource inserts the HPET resources used into the resource
686 * tree.
687 */
688 static __init int hpet_insert_resource(void)
689 {
690 if (!hpet_res)
691 return 1;
692
693 return insert_resource(&iomem_resource, hpet_res);
694 }
695
696 late_initcall(hpet_insert_resource);
697
698 #else
699 #define acpi_parse_hpet NULL
700 #endif
701
702 static int __init acpi_parse_fadt(struct acpi_table_header *table)
703 {
704
705 #ifdef CONFIG_X86_PM_TIMER
706 /* detect the location of the ACPI PM Timer */
707 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
708 /* FADT rev. 2 */
709 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
710 ACPI_ADR_SPACE_SYSTEM_IO)
711 return 0;
712
713 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
714 /*
715 * "X" fields are optional extensions to the original V1.0
716 * fields, so we must selectively expand V1.0 fields if the
717 * corresponding X field is zero.
718 */
719 if (!pmtmr_ioport)
720 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
721 } else {
722 /* FADT rev. 1 */
723 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
724 }
725 if (pmtmr_ioport)
726 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
727 pmtmr_ioport);
728 #endif
729 return 0;
730 }
731
732 #ifdef CONFIG_X86_LOCAL_APIC
733 /*
734 * Parse LAPIC entries in MADT
735 * returns 0 on success, < 0 on error
736 */
737 static int __init acpi_parse_madt_lapic_entries(void)
738 {
739 int count;
740
741 if (!cpu_has_apic)
742 return -ENODEV;
743
744 /*
745 * Note that the LAPIC address is obtained from the MADT (32-bit value)
746 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
747 */
748
749 count =
750 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
751 acpi_parse_lapic_addr_ovr, 0);
752 if (count < 0) {
753 printk(KERN_ERR PREFIX
754 "Error parsing LAPIC address override entry\n");
755 return count;
756 }
757
758 mp_register_lapic_address(acpi_lapic_addr);
759
760 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
761 MAX_APICS);
762 if (!count) {
763 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
764 /* TBD: Cleanup to allow fallback to MPS */
765 return -ENODEV;
766 } else if (count < 0) {
767 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
768 /* TBD: Cleanup to allow fallback to MPS */
769 return count;
770 }
771
772 count =
773 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
774 if (count < 0) {
775 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
776 /* TBD: Cleanup to allow fallback to MPS */
777 return count;
778 }
779 return 0;
780 }
781 #endif /* CONFIG_X86_LOCAL_APIC */
782
783 #ifdef CONFIG_X86_IO_APIC
784 /*
785 * Parse IOAPIC related entries in MADT
786 * returns 0 on success, < 0 on error
787 */
788 static int __init acpi_parse_madt_ioapic_entries(void)
789 {
790 int count;
791
792 /*
793 * ACPI interpreter is required to complete interrupt setup,
794 * so if it is off, don't enumerate the io-apics with ACPI.
795 * If MPS is present, it will handle them,
796 * otherwise the system will stay in PIC mode
797 */
798 if (acpi_disabled || acpi_noirq) {
799 return -ENODEV;
800 }
801
802 if (!cpu_has_apic)
803 return -ENODEV;
804
805 /*
806 * if "noapic" boot option, don't look for IO-APICs
807 */
808 if (skip_ioapic_setup) {
809 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
810 "due to 'noapic' option.\n");
811 return -ENODEV;
812 }
813
814 count =
815 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
816 MAX_IO_APICS);
817 if (!count) {
818 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
819 return -ENODEV;
820 } else if (count < 0) {
821 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
822 return count;
823 }
824
825 count =
826 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
827 NR_IRQ_VECTORS);
828 if (count < 0) {
829 printk(KERN_ERR PREFIX
830 "Error parsing interrupt source overrides entry\n");
831 /* TBD: Cleanup to allow fallback to MPS */
832 return count;
833 }
834
835 /*
836 * If BIOS did not supply an INT_SRC_OVR for the SCI
837 * pretend we got one so we can set the SCI flags.
838 */
839 if (!acpi_sci_override_gsi)
840 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
841
842 /* Fill in identity legacy mapings where no override */
843 mp_config_acpi_legacy_irqs();
844
845 count =
846 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
847 NR_IRQ_VECTORS);
848 if (count < 0) {
849 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
850 /* TBD: Cleanup to allow fallback to MPS */
851 return count;
852 }
853
854 return 0;
855 }
856 #else
857 static inline int acpi_parse_madt_ioapic_entries(void)
858 {
859 return -1;
860 }
861 #endif /* !CONFIG_X86_IO_APIC */
862
863 static void __init acpi_process_madt(void)
864 {
865 #ifdef CONFIG_X86_LOCAL_APIC
866 int error;
867
868 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
869
870 /*
871 * Parse MADT LAPIC entries
872 */
873 error = acpi_parse_madt_lapic_entries();
874 if (!error) {
875 acpi_lapic = 1;
876
877 #ifdef CONFIG_X86_GENERICARCH
878 generic_bigsmp_probe();
879 #endif
880 /*
881 * Parse MADT IO-APIC entries
882 */
883 error = acpi_parse_madt_ioapic_entries();
884 if (!error) {
885 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
886 acpi_irq_balance_set(NULL);
887 acpi_ioapic = 1;
888
889 smp_found_config = 1;
890 setup_apic_routing();
891 }
892 }
893 if (error == -EINVAL) {
894 /*
895 * Dell Precision Workstation 410, 610 come here.
896 */
897 printk(KERN_ERR PREFIX
898 "Invalid BIOS MADT, disabling ACPI\n");
899 disable_acpi();
900 }
901 }
902 #endif
903 return;
904 }
905
906 #ifdef __i386__
907
908 static int __init disable_acpi_irq(const struct dmi_system_id *d)
909 {
910 if (!acpi_force) {
911 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
912 d->ident);
913 acpi_noirq_set();
914 }
915 return 0;
916 }
917
918 static int __init disable_acpi_pci(const struct dmi_system_id *d)
919 {
920 if (!acpi_force) {
921 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
922 d->ident);
923 acpi_disable_pci();
924 }
925 return 0;
926 }
927
928 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
929 {
930 if (!acpi_force) {
931 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
932 disable_acpi();
933 } else {
934 printk(KERN_NOTICE
935 "Warning: DMI blacklist says broken, but acpi forced\n");
936 }
937 return 0;
938 }
939
940 /*
941 * Limit ACPI to CPU enumeration for HT
942 */
943 static int __init force_acpi_ht(const struct dmi_system_id *d)
944 {
945 if (!acpi_force) {
946 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
947 d->ident);
948 disable_acpi();
949 acpi_ht = 1;
950 } else {
951 printk(KERN_NOTICE
952 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
953 }
954 return 0;
955 }
956
957 /*
958 * If your system is blacklisted here, but you find that acpi=force
959 * works for you, please contact acpi-devel@sourceforge.net
960 */
961 static struct dmi_system_id __initdata acpi_dmi_table[] = {
962 /*
963 * Boxes that need ACPI disabled
964 */
965 {
966 .callback = dmi_disable_acpi,
967 .ident = "IBM Thinkpad",
968 .matches = {
969 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
970 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
971 },
972 },
973
974 /*
975 * Boxes that need acpi=ht
976 */
977 {
978 .callback = force_acpi_ht,
979 .ident = "FSC Primergy T850",
980 .matches = {
981 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
982 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
983 },
984 },
985 {
986 .callback = force_acpi_ht,
987 .ident = "HP VISUALIZE NT Workstation",
988 .matches = {
989 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
990 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
991 },
992 },
993 {
994 .callback = force_acpi_ht,
995 .ident = "Compaq Workstation W8000",
996 .matches = {
997 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
998 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
999 },
1000 },
1001 {
1002 .callback = force_acpi_ht,
1003 .ident = "ASUS P4B266",
1004 .matches = {
1005 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1006 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1007 },
1008 },
1009 {
1010 .callback = force_acpi_ht,
1011 .ident = "ASUS P2B-DS",
1012 .matches = {
1013 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1014 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1015 },
1016 },
1017 {
1018 .callback = force_acpi_ht,
1019 .ident = "ASUS CUR-DLS",
1020 .matches = {
1021 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1022 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1023 },
1024 },
1025 {
1026 .callback = force_acpi_ht,
1027 .ident = "ABIT i440BX-W83977",
1028 .matches = {
1029 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1030 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1031 },
1032 },
1033 {
1034 .callback = force_acpi_ht,
1035 .ident = "IBM Bladecenter",
1036 .matches = {
1037 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1038 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1039 },
1040 },
1041 {
1042 .callback = force_acpi_ht,
1043 .ident = "IBM eServer xSeries 360",
1044 .matches = {
1045 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1046 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1047 },
1048 },
1049 {
1050 .callback = force_acpi_ht,
1051 .ident = "IBM eserver xSeries 330",
1052 .matches = {
1053 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1054 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1055 },
1056 },
1057 {
1058 .callback = force_acpi_ht,
1059 .ident = "IBM eserver xSeries 440",
1060 .matches = {
1061 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1062 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1063 },
1064 },
1065
1066 /*
1067 * Boxes that need ACPI PCI IRQ routing disabled
1068 */
1069 {
1070 .callback = disable_acpi_irq,
1071 .ident = "ASUS A7V",
1072 .matches = {
1073 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1074 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1075 /* newer BIOS, Revision 1011, does work */
1076 DMI_MATCH(DMI_BIOS_VERSION,
1077 "ASUS A7V ACPI BIOS Revision 1007"),
1078 },
1079 },
1080 {
1081 /*
1082 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1083 * for LPC bridge, which is needed for the PCI
1084 * interrupt links to work. DSDT fix is in bug 5966.
1085 * 2645, 2646 model numbers are shared with 600/600E/600X
1086 */
1087 .callback = disable_acpi_irq,
1088 .ident = "IBM Thinkpad 600 Series 2645",
1089 .matches = {
1090 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1091 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1092 },
1093 },
1094 {
1095 .callback = disable_acpi_irq,
1096 .ident = "IBM Thinkpad 600 Series 2646",
1097 .matches = {
1098 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1099 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1100 },
1101 },
1102 /*
1103 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1104 */
1105 { /* _BBN 0 bug */
1106 .callback = disable_acpi_pci,
1107 .ident = "ASUS PR-DLS",
1108 .matches = {
1109 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1110 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1111 DMI_MATCH(DMI_BIOS_VERSION,
1112 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1113 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1114 },
1115 },
1116 {
1117 .callback = disable_acpi_pci,
1118 .ident = "Acer TravelMate 36x Laptop",
1119 .matches = {
1120 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1121 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1122 },
1123 },
1124 {}
1125 };
1126
1127 #endif /* __i386__ */
1128
1129 /*
1130 * acpi_boot_table_init() and acpi_boot_init()
1131 * called from setup_arch(), always.
1132 * 1. checksums all tables
1133 * 2. enumerates lapics
1134 * 3. enumerates io-apics
1135 *
1136 * acpi_table_init() is separate to allow reading SRAT without
1137 * other side effects.
1138 *
1139 * side effects of acpi_boot_init:
1140 * acpi_lapic = 1 if LAPIC found
1141 * acpi_ioapic = 1 if IOAPIC found
1142 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1143 * if acpi_blacklisted() acpi_disabled = 1;
1144 * acpi_irq_model=...
1145 * ...
1146 *
1147 * return value: (currently ignored)
1148 * 0: success
1149 * !0: failure
1150 */
1151
1152 int __init acpi_boot_table_init(void)
1153 {
1154 int error;
1155
1156 #ifdef __i386__
1157 dmi_check_system(acpi_dmi_table);
1158 #endif
1159
1160 /*
1161 * If acpi_disabled, bail out
1162 * One exception: acpi=ht continues far enough to enumerate LAPICs
1163 */
1164 if (acpi_disabled && !acpi_ht)
1165 return 1;
1166
1167 /*
1168 * Initialize the ACPI boot-time table parser.
1169 */
1170 error = acpi_table_init();
1171 if (error) {
1172 disable_acpi();
1173 return error;
1174 }
1175
1176 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1177
1178 /*
1179 * blacklist may disable ACPI entirely
1180 */
1181 error = acpi_blacklisted();
1182 if (error) {
1183 if (acpi_force) {
1184 printk(KERN_WARNING PREFIX "acpi=force override\n");
1185 } else {
1186 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1187 disable_acpi();
1188 return error;
1189 }
1190 }
1191
1192 return 0;
1193 }
1194
1195 int __init acpi_boot_init(void)
1196 {
1197 /*
1198 * If acpi_disabled, bail out
1199 * One exception: acpi=ht continues far enough to enumerate LAPICs
1200 */
1201 if (acpi_disabled && !acpi_ht)
1202 return 1;
1203
1204 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1205
1206 /*
1207 * set sci_int and PM timer address
1208 */
1209 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1210
1211 /*
1212 * Process the Multiple APIC Description Table (MADT), if present
1213 */
1214 acpi_process_madt();
1215
1216 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1217
1218 return 0;
1219 }
1220
1221 static int __init parse_acpi(char *arg)
1222 {
1223 if (!arg)
1224 return -EINVAL;
1225
1226 /* "acpi=off" disables both ACPI table parsing and interpreter */
1227 if (strcmp(arg, "off") == 0) {
1228 disable_acpi();
1229 }
1230 /* acpi=force to over-ride black-list */
1231 else if (strcmp(arg, "force") == 0) {
1232 acpi_force = 1;
1233 acpi_ht = 1;
1234 acpi_disabled = 0;
1235 }
1236 /* acpi=strict disables out-of-spec workarounds */
1237 else if (strcmp(arg, "strict") == 0) {
1238 acpi_strict = 1;
1239 }
1240 /* Limit ACPI just to boot-time to enable HT */
1241 else if (strcmp(arg, "ht") == 0) {
1242 if (!acpi_force)
1243 disable_acpi();
1244 acpi_ht = 1;
1245 }
1246 /* "acpi=noirq" disables ACPI interrupt routing */
1247 else if (strcmp(arg, "noirq") == 0) {
1248 acpi_noirq_set();
1249 } else {
1250 /* Core will printk when we return error. */
1251 return -EINVAL;
1252 }
1253 return 0;
1254 }
1255 early_param("acpi", parse_acpi);
1256
1257 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1258 static int __init parse_pci(char *arg)
1259 {
1260 if (arg && strcmp(arg, "noacpi") == 0)
1261 acpi_disable_pci();
1262 return 0;
1263 }
1264 early_param("pci", parse_pci);
1265
1266 #ifdef CONFIG_X86_IO_APIC
1267 static int __init parse_acpi_skip_timer_override(char *arg)
1268 {
1269 acpi_skip_timer_override = 1;
1270 return 0;
1271 }
1272 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1273
1274 static int __init parse_acpi_use_timer_override(char *arg)
1275 {
1276 acpi_use_timer_override = 1;
1277 return 0;
1278 }
1279 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1280 #endif /* CONFIG_X86_IO_APIC */
1281
1282 static int __init setup_acpi_sci(char *s)
1283 {
1284 if (!s)
1285 return -EINVAL;
1286 if (!strcmp(s, "edge"))
1287 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1288 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1289 else if (!strcmp(s, "level"))
1290 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1291 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1292 else if (!strcmp(s, "high"))
1293 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1294 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1295 else if (!strcmp(s, "low"))
1296 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1297 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1298 else
1299 return -EINVAL;
1300 return 0;
1301 }
1302 early_param("acpi_sci", setup_acpi_sci);
1303
1304 int __acpi_acquire_global_lock(unsigned int *lock)
1305 {
1306 unsigned int old, new, val;
1307 do {
1308 old = *lock;
1309 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1310 val = cmpxchg(lock, old, new);
1311 } while (unlikely (val != old));
1312 return (new < 3) ? -1 : 0;
1313 }
1314
1315 int __acpi_release_global_lock(unsigned int *lock)
1316 {
1317 unsigned int old, new, val;
1318 do {
1319 old = *lock;
1320 new = old & ~0x3;
1321 val = cmpxchg(lock, old, new);
1322 } while (unlikely (val != old));
1323 return old & 0x1;
1324 }
Linux kernel - Deliverables
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