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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
[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/genapic.h>
41 #include <asm/io.h>
42 #include <asm/mpspec.h>
43 #include <asm/smp.h>
44
45 #ifdef CONFIG_X86_LOCAL_APIC
46 # include <mach_apic.h>
47 #endif
48
49 static int __initdata acpi_force = 0;
50
51 #ifdef CONFIG_ACPI
52 int acpi_disabled = 0;
53 #else
54 int acpi_disabled = 1;
55 #endif
56 EXPORT_SYMBOL(acpi_disabled);
57
58 #ifdef CONFIG_X86_64
59
60 #include <asm/proto.h>
61
62 #else /* X86 */
63
64 #ifdef CONFIG_X86_LOCAL_APIC
65 #include <mach_apic.h>
66 #include <mach_mpparse.h>
67 #endif /* CONFIG_X86_LOCAL_APIC */
68
69 #endif /* X86 */
70
71 #define BAD_MADT_ENTRY(entry, end) ( \
72 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
73 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
74
75 #define PREFIX "ACPI: "
76
77 int acpi_noirq; /* skip ACPI IRQ initialization */
78 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
79 EXPORT_SYMBOL(acpi_pci_disabled);
80 int acpi_ht __initdata = 1; /* enable HT */
81
82 int acpi_lapic;
83 int acpi_ioapic;
84 int acpi_strict;
85
86 u8 acpi_sci_flags __initdata;
87 int acpi_sci_override_gsi __initdata;
88 int acpi_skip_timer_override __initdata;
89 int acpi_use_timer_override __initdata;
90
91 #ifdef CONFIG_X86_LOCAL_APIC
92 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
93 #endif
94
95 #ifndef __HAVE_ARCH_CMPXCHG
96 #warning ACPI uses CMPXCHG, i486 and later hardware
97 #endif
98
99 /* --------------------------------------------------------------------------
100 Boot-time Configuration
101 -------------------------------------------------------------------------- */
102
103 /*
104 * The default interrupt routing model is PIC (8259). This gets
105 * overridden if IOAPICs are enumerated (below).
106 */
107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
108
109
110 /*
111 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
112 * to map the target physical address. The problem is that set_fixmap()
113 * provides a single page, and it is possible that the page is not
114 * sufficient.
115 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
116 * i.e. until the next __va_range() call.
117 *
118 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
119 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
120 * count idx down while incrementing the phys address.
121 */
122 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
123 {
124 unsigned long base, offset, mapped_size;
125 int idx;
126
127 if (!phys || !size)
128 return NULL;
129
130 if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
131 return __va(phys);
132
133 offset = phys & (PAGE_SIZE - 1);
134 mapped_size = PAGE_SIZE - offset;
135 clear_fixmap(FIX_ACPI_END);
136 set_fixmap(FIX_ACPI_END, phys);
137 base = fix_to_virt(FIX_ACPI_END);
138
139 /*
140 * Most cases can be covered by the below.
141 */
142 idx = FIX_ACPI_END;
143 while (mapped_size < size) {
144 if (--idx < FIX_ACPI_BEGIN)
145 return NULL; /* cannot handle this */
146 phys += PAGE_SIZE;
147 clear_fixmap(idx);
148 set_fixmap(idx, phys);
149 mapped_size += PAGE_SIZE;
150 }
151
152 return ((unsigned char *)base + offset);
153 }
154
155 #ifdef CONFIG_PCI_MMCONFIG
156 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
157 struct acpi_mcfg_allocation *pci_mmcfg_config;
158 int pci_mmcfg_config_num;
159
160 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
161
162 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
163 {
164 if (!strcmp(mcfg->header.oem_id, "SGI"))
165 acpi_mcfg_64bit_base_addr = TRUE;
166
167 return 0;
168 }
169
170 int __init acpi_parse_mcfg(struct acpi_table_header *header)
171 {
172 struct acpi_table_mcfg *mcfg;
173 unsigned long i;
174 int config_size;
175
176 if (!header)
177 return -EINVAL;
178
179 mcfg = (struct acpi_table_mcfg *)header;
180
181 /* how many config structures do we have */
182 pci_mmcfg_config_num = 0;
183 i = header->length - sizeof(struct acpi_table_mcfg);
184 while (i >= sizeof(struct acpi_mcfg_allocation)) {
185 ++pci_mmcfg_config_num;
186 i -= sizeof(struct acpi_mcfg_allocation);
187 };
188 if (pci_mmcfg_config_num == 0) {
189 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
190 return -ENODEV;
191 }
192
193 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
194 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
195 if (!pci_mmcfg_config) {
196 printk(KERN_WARNING PREFIX
197 "No memory for MCFG config tables\n");
198 return -ENOMEM;
199 }
200
201 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
202
203 acpi_mcfg_oem_check(mcfg);
204
205 for (i = 0; i < pci_mmcfg_config_num; ++i) {
206 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
207 !acpi_mcfg_64bit_base_addr) {
208 printk(KERN_ERR PREFIX
209 "MMCONFIG not in low 4GB of memory\n");
210 kfree(pci_mmcfg_config);
211 pci_mmcfg_config_num = 0;
212 return -ENODEV;
213 }
214 }
215
216 return 0;
217 }
218 #endif /* CONFIG_PCI_MMCONFIG */
219
220 #ifdef CONFIG_X86_LOCAL_APIC
221 static int __init acpi_parse_madt(struct acpi_table_header *table)
222 {
223 struct acpi_table_madt *madt = NULL;
224
225 if (!cpu_has_apic)
226 return -EINVAL;
227
228 madt = (struct acpi_table_madt *)table;
229 if (!madt) {
230 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
231 return -ENODEV;
232 }
233
234 if (madt->address) {
235 acpi_lapic_addr = (u64) madt->address;
236
237 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
238 madt->address);
239 }
240
241 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
242
243 return 0;
244 }
245
246 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
247 {
248 unsigned int ver = 0;
249
250 if (!enabled) {
251 ++disabled_cpus;
252 return;
253 }
254
255 if (boot_cpu_physical_apicid != -1U)
256 ver = apic_version[boot_cpu_physical_apicid];
257
258 generic_processor_info(id, ver);
259 }
260
261 static int __init
262 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
263 {
264 struct acpi_madt_local_apic *processor = NULL;
265
266 processor = (struct acpi_madt_local_apic *)header;
267
268 if (BAD_MADT_ENTRY(processor, end))
269 return -EINVAL;
270
271 acpi_table_print_madt_entry(header);
272
273 /*
274 * We need to register disabled CPU as well to permit
275 * counting disabled CPUs. This allows us to size
276 * cpus_possible_map more accurately, to permit
277 * to not preallocating memory for all NR_CPUS
278 * when we use CPU hotplug.
279 */
280 acpi_register_lapic(processor->id, /* APIC ID */
281 processor->lapic_flags & ACPI_MADT_ENABLED);
282
283 return 0;
284 }
285
286 static int __init
287 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
288 {
289 struct acpi_madt_local_sapic *processor = NULL;
290
291 processor = (struct acpi_madt_local_sapic *)header;
292
293 if (BAD_MADT_ENTRY(processor, end))
294 return -EINVAL;
295
296 acpi_table_print_madt_entry(header);
297
298 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
299 processor->lapic_flags & ACPI_MADT_ENABLED);
300
301 return 0;
302 }
303
304 static int __init
305 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
306 const unsigned long end)
307 {
308 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
309
310 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
311
312 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
313 return -EINVAL;
314
315 acpi_lapic_addr = lapic_addr_ovr->address;
316
317 return 0;
318 }
319
320 static int __init
321 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
322 {
323 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
324
325 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
326
327 if (BAD_MADT_ENTRY(lapic_nmi, end))
328 return -EINVAL;
329
330 acpi_table_print_madt_entry(header);
331
332 if (lapic_nmi->lint != 1)
333 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
334
335 return 0;
336 }
337
338 #endif /*CONFIG_X86_LOCAL_APIC */
339
340 #ifdef CONFIG_X86_IO_APIC
341
342 static int __init
343 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
344 {
345 struct acpi_madt_io_apic *ioapic = NULL;
346
347 ioapic = (struct acpi_madt_io_apic *)header;
348
349 if (BAD_MADT_ENTRY(ioapic, end))
350 return -EINVAL;
351
352 acpi_table_print_madt_entry(header);
353
354 mp_register_ioapic(ioapic->id,
355 ioapic->address, ioapic->global_irq_base);
356
357 return 0;
358 }
359
360 /*
361 * Parse Interrupt Source Override for the ACPI SCI
362 */
363 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
364 {
365 if (trigger == 0) /* compatible SCI trigger is level */
366 trigger = 3;
367
368 if (polarity == 0) /* compatible SCI polarity is low */
369 polarity = 3;
370
371 /* Command-line over-ride via acpi_sci= */
372 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
373 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
374
375 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
376 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
377
378 /*
379 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
380 * If GSI is < 16, this will update its flags,
381 * else it will create a new mp_irqs[] entry.
382 */
383 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
384
385 /*
386 * stash over-ride to indicate we've been here
387 * and for later update of acpi_gbl_FADT
388 */
389 acpi_sci_override_gsi = gsi;
390 return;
391 }
392
393 static int __init
394 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
395 const unsigned long end)
396 {
397 struct acpi_madt_interrupt_override *intsrc = NULL;
398
399 intsrc = (struct acpi_madt_interrupt_override *)header;
400
401 if (BAD_MADT_ENTRY(intsrc, end))
402 return -EINVAL;
403
404 acpi_table_print_madt_entry(header);
405
406 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
407 acpi_sci_ioapic_setup(intsrc->global_irq,
408 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
409 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
410 return 0;
411 }
412
413 if (acpi_skip_timer_override &&
414 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
415 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
416 return 0;
417 }
418
419 mp_override_legacy_irq(intsrc->source_irq,
420 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
421 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
422 intsrc->global_irq);
423
424 return 0;
425 }
426
427 static int __init
428 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
429 {
430 struct acpi_madt_nmi_source *nmi_src = NULL;
431
432 nmi_src = (struct acpi_madt_nmi_source *)header;
433
434 if (BAD_MADT_ENTRY(nmi_src, end))
435 return -EINVAL;
436
437 acpi_table_print_madt_entry(header);
438
439 /* TBD: Support nimsrc entries? */
440
441 return 0;
442 }
443
444 #endif /* CONFIG_X86_IO_APIC */
445
446 /*
447 * acpi_pic_sci_set_trigger()
448 *
449 * use ELCR to set PIC-mode trigger type for SCI
450 *
451 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
452 * it may require Edge Trigger -- use "acpi_sci=edge"
453 *
454 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
455 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
456 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
457 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
458 */
459
460 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
461 {
462 unsigned int mask = 1 << irq;
463 unsigned int old, new;
464
465 /* Real old ELCR mask */
466 old = inb(0x4d0) | (inb(0x4d1) << 8);
467
468 /*
469 * If we use ACPI to set PCI IRQs, then we should clear ELCR
470 * since we will set it correctly as we enable the PCI irq
471 * routing.
472 */
473 new = acpi_noirq ? old : 0;
474
475 /*
476 * Update SCI information in the ELCR, it isn't in the PCI
477 * routing tables..
478 */
479 switch (trigger) {
480 case 1: /* Edge - clear */
481 new &= ~mask;
482 break;
483 case 3: /* Level - set */
484 new |= mask;
485 break;
486 }
487
488 if (old == new)
489 return;
490
491 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
492 outb(new, 0x4d0);
493 outb(new >> 8, 0x4d1);
494 }
495
496 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
497 {
498 *irq = gsi;
499 return 0;
500 }
501
502 /*
503 * success: return IRQ number (>=0)
504 * failure: return < 0
505 */
506 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
507 {
508 unsigned int irq;
509 unsigned int plat_gsi = gsi;
510
511 #ifdef CONFIG_PCI
512 /*
513 * Make sure all (legacy) PCI IRQs are set as level-triggered.
514 */
515 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
516 if (triggering == ACPI_LEVEL_SENSITIVE)
517 eisa_set_level_irq(gsi);
518 }
519 #endif
520
521 #ifdef CONFIG_X86_IO_APIC
522 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
523 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
524 }
525 #endif
526 acpi_gsi_to_irq(plat_gsi, &irq);
527 return irq;
528 }
529
530 /*
531 * ACPI based hotplug support for CPU
532 */
533 #ifdef CONFIG_ACPI_HOTPLUG_CPU
534
535 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
536 {
537 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
538 union acpi_object *obj;
539 struct acpi_madt_local_apic *lapic;
540 cpumask_t tmp_map, new_map;
541 u8 physid;
542 int cpu;
543
544 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
545 return -EINVAL;
546
547 if (!buffer.length || !buffer.pointer)
548 return -EINVAL;
549
550 obj = buffer.pointer;
551 if (obj->type != ACPI_TYPE_BUFFER ||
552 obj->buffer.length < sizeof(*lapic)) {
553 kfree(buffer.pointer);
554 return -EINVAL;
555 }
556
557 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
558
559 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
560 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
561 kfree(buffer.pointer);
562 return -EINVAL;
563 }
564
565 physid = lapic->id;
566
567 kfree(buffer.pointer);
568 buffer.length = ACPI_ALLOCATE_BUFFER;
569 buffer.pointer = NULL;
570
571 tmp_map = cpu_present_map;
572 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
573
574 /*
575 * If mp_register_lapic successfully generates a new logical cpu
576 * number, then the following will get us exactly what was mapped
577 */
578 cpus_andnot(new_map, cpu_present_map, tmp_map);
579 if (cpus_empty(new_map)) {
580 printk ("Unable to map lapic to logical cpu number\n");
581 return -EINVAL;
582 }
583
584 cpu = first_cpu(new_map);
585
586 *pcpu = cpu;
587 return 0;
588 }
589
590 /* wrapper to silence section mismatch warning */
591 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
592 {
593 return _acpi_map_lsapic(handle, pcpu);
594 }
595 EXPORT_SYMBOL(acpi_map_lsapic);
596
597 int acpi_unmap_lsapic(int cpu)
598 {
599 per_cpu(x86_cpu_to_apicid, cpu) = -1;
600 cpu_clear(cpu, cpu_present_map);
601 num_processors--;
602
603 return (0);
604 }
605
606 EXPORT_SYMBOL(acpi_unmap_lsapic);
607 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
608
609 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
610 {
611 /* TBD */
612 return -EINVAL;
613 }
614
615 EXPORT_SYMBOL(acpi_register_ioapic);
616
617 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
618 {
619 /* TBD */
620 return -EINVAL;
621 }
622
623 EXPORT_SYMBOL(acpi_unregister_ioapic);
624
625 static int __init acpi_parse_sbf(struct acpi_table_header *table)
626 {
627 struct acpi_table_boot *sb;
628
629 sb = (struct acpi_table_boot *)table;
630 if (!sb) {
631 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
632 return -ENODEV;
633 }
634
635 sbf_port = sb->cmos_index; /* Save CMOS port */
636
637 return 0;
638 }
639
640 #ifdef CONFIG_HPET_TIMER
641 #include <asm/hpet.h>
642
643 static struct __initdata resource *hpet_res;
644
645 static int __init acpi_parse_hpet(struct acpi_table_header *table)
646 {
647 struct acpi_table_hpet *hpet_tbl;
648
649 hpet_tbl = (struct acpi_table_hpet *)table;
650 if (!hpet_tbl) {
651 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
652 return -ENODEV;
653 }
654
655 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
656 printk(KERN_WARNING PREFIX "HPET timers must be located in "
657 "memory.\n");
658 return -1;
659 }
660
661 hpet_address = hpet_tbl->address.address;
662
663 /*
664 * Some broken BIOSes advertise HPET at 0x0. We really do not
665 * want to allocate a resource there.
666 */
667 if (!hpet_address) {
668 printk(KERN_WARNING PREFIX
669 "HPET id: %#x base: %#lx is invalid\n",
670 hpet_tbl->id, hpet_address);
671 return 0;
672 }
673 #ifdef CONFIG_X86_64
674 /*
675 * Some even more broken BIOSes advertise HPET at
676 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
677 * some noise:
678 */
679 if (hpet_address == 0xfed0000000000000UL) {
680 if (!hpet_force_user) {
681 printk(KERN_WARNING PREFIX "HPET id: %#x "
682 "base: 0xfed0000000000000 is bogus\n "
683 "try hpet=force on the kernel command line to "
684 "fix it up to 0xfed00000.\n", hpet_tbl->id);
685 hpet_address = 0;
686 return 0;
687 }
688 printk(KERN_WARNING PREFIX
689 "HPET id: %#x base: 0xfed0000000000000 fixed up "
690 "to 0xfed00000.\n", hpet_tbl->id);
691 hpet_address >>= 32;
692 }
693 #endif
694 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
695 hpet_tbl->id, hpet_address);
696
697 /*
698 * Allocate and initialize the HPET firmware resource for adding into
699 * the resource tree during the lateinit timeframe.
700 */
701 #define HPET_RESOURCE_NAME_SIZE 9
702 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
703
704 hpet_res->name = (void *)&hpet_res[1];
705 hpet_res->flags = IORESOURCE_MEM;
706 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
707 hpet_tbl->sequence);
708
709 hpet_res->start = hpet_address;
710 hpet_res->end = hpet_address + (1 * 1024) - 1;
711
712 return 0;
713 }
714
715 /*
716 * hpet_insert_resource inserts the HPET resources used into the resource
717 * tree.
718 */
719 static __init int hpet_insert_resource(void)
720 {
721 if (!hpet_res)
722 return 1;
723
724 return insert_resource(&iomem_resource, hpet_res);
725 }
726
727 late_initcall(hpet_insert_resource);
728
729 #else
730 #define acpi_parse_hpet NULL
731 #endif
732
733 static int __init acpi_parse_fadt(struct acpi_table_header *table)
734 {
735
736 #ifdef CONFIG_X86_PM_TIMER
737 /* detect the location of the ACPI PM Timer */
738 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
739 /* FADT rev. 2 */
740 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
741 ACPI_ADR_SPACE_SYSTEM_IO)
742 return 0;
743
744 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
745 /*
746 * "X" fields are optional extensions to the original V1.0
747 * fields, so we must selectively expand V1.0 fields if the
748 * corresponding X field is zero.
749 */
750 if (!pmtmr_ioport)
751 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
752 } else {
753 /* FADT rev. 1 */
754 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
755 }
756 if (pmtmr_ioport)
757 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
758 pmtmr_ioport);
759 #endif
760 return 0;
761 }
762
763 #ifdef CONFIG_X86_LOCAL_APIC
764 /*
765 * Parse LAPIC entries in MADT
766 * returns 0 on success, < 0 on error
767 */
768
769 static void __init acpi_register_lapic_address(unsigned long address)
770 {
771 mp_lapic_addr = address;
772
773 set_fixmap_nocache(FIX_APIC_BASE, address);
774 if (boot_cpu_physical_apicid == -1U) {
775 boot_cpu_physical_apicid = read_apic_id();
776 apic_version[boot_cpu_physical_apicid] =
777 GET_APIC_VERSION(apic_read(APIC_LVR));
778 }
779 }
780
781 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
782 {
783 int count;
784
785 if (!cpu_has_apic)
786 return -ENODEV;
787
788 /*
789 * Note that the LAPIC address is obtained from the MADT (32-bit value)
790 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
791 */
792
793 count =
794 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
795 acpi_parse_lapic_addr_ovr, 0);
796 if (count < 0) {
797 printk(KERN_ERR PREFIX
798 "Error parsing LAPIC address override entry\n");
799 return count;
800 }
801
802 acpi_register_lapic_address(acpi_lapic_addr);
803
804 return count;
805 }
806
807 static int __init acpi_parse_madt_lapic_entries(void)
808 {
809 int count;
810
811 if (!cpu_has_apic)
812 return -ENODEV;
813
814 /*
815 * Note that the LAPIC address is obtained from the MADT (32-bit value)
816 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
817 */
818
819 count =
820 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
821 acpi_parse_lapic_addr_ovr, 0);
822 if (count < 0) {
823 printk(KERN_ERR PREFIX
824 "Error parsing LAPIC address override entry\n");
825 return count;
826 }
827
828 acpi_register_lapic_address(acpi_lapic_addr);
829
830 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
831 acpi_parse_sapic, MAX_APICS);
832
833 if (!count)
834 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
835 acpi_parse_lapic, MAX_APICS);
836 if (!count) {
837 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
838 /* TBD: Cleanup to allow fallback to MPS */
839 return -ENODEV;
840 } else if (count < 0) {
841 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
842 /* TBD: Cleanup to allow fallback to MPS */
843 return count;
844 }
845
846 count =
847 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
848 if (count < 0) {
849 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
850 /* TBD: Cleanup to allow fallback to MPS */
851 return count;
852 }
853 return 0;
854 }
855 #endif /* CONFIG_X86_LOCAL_APIC */
856
857 #ifdef CONFIG_X86_IO_APIC
858 #define MP_ISA_BUS 0
859
860 #ifdef CONFIG_X86_ES7000
861 extern int es7000_plat;
862 #endif
863
864 static struct {
865 int apic_id;
866 int gsi_base;
867 int gsi_end;
868 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
869 } mp_ioapic_routing[MAX_IO_APICS];
870
871 static int mp_find_ioapic(int gsi)
872 {
873 int i = 0;
874
875 /* Find the IOAPIC that manages this GSI. */
876 for (i = 0; i < nr_ioapics; i++) {
877 if ((gsi >= mp_ioapic_routing[i].gsi_base)
878 && (gsi <= mp_ioapic_routing[i].gsi_end))
879 return i;
880 }
881
882 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
883 return -1;
884 }
885
886 static u8 __init uniq_ioapic_id(u8 id)
887 {
888 #ifdef CONFIG_X86_32
889 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
890 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
891 return io_apic_get_unique_id(nr_ioapics, id);
892 else
893 return id;
894 #else
895 int i;
896 DECLARE_BITMAP(used, 256);
897 bitmap_zero(used, 256);
898 for (i = 0; i < nr_ioapics; i++) {
899 struct mp_config_ioapic *ia = &mp_ioapics[i];
900 __set_bit(ia->mp_apicid, used);
901 }
902 if (!test_bit(id, used))
903 return id;
904 return find_first_zero_bit(used, 256);
905 #endif
906 }
907
908 static int bad_ioapic(unsigned long address)
909 {
910 if (nr_ioapics >= MAX_IO_APICS) {
911 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
912 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
913 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
914 }
915 if (!address) {
916 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
917 " found in table, skipping!\n");
918 return 1;
919 }
920 return 0;
921 }
922
923 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
924 {
925 int idx = 0;
926
927 if (bad_ioapic(address))
928 return;
929
930 idx = nr_ioapics;
931
932 mp_ioapics[idx].mp_type = MP_IOAPIC;
933 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
934 mp_ioapics[idx].mp_apicaddr = address;
935
936 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
937 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
938 #ifdef CONFIG_X86_32
939 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
940 #else
941 mp_ioapics[idx].mp_apicver = 0;
942 #endif
943 /*
944 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
945 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
946 */
947 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
948 mp_ioapic_routing[idx].gsi_base = gsi_base;
949 mp_ioapic_routing[idx].gsi_end = gsi_base +
950 io_apic_get_redir_entries(idx);
951
952 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
953 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
954 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
955 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
956
957 nr_ioapics++;
958 }
959
960 static void assign_to_mp_irq(struct mp_config_intsrc *m,
961 struct mp_config_intsrc *mp_irq)
962 {
963 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
964 }
965
966 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
967 struct mp_config_intsrc *m)
968 {
969 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
970 }
971
972 static void save_mp_irq(struct mp_config_intsrc *m)
973 {
974 int i;
975
976 for (i = 0; i < mp_irq_entries; i++) {
977 if (!mp_irq_cmp(&mp_irqs[i], m))
978 return;
979 }
980
981 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
982 if (++mp_irq_entries == MAX_IRQ_SOURCES)
983 panic("Max # of irq sources exceeded!!\n");
984 }
985
986 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
987 {
988 int ioapic;
989 int pin;
990 struct mp_config_intsrc mp_irq;
991
992 /*
993 * Convert 'gsi' to 'ioapic.pin'.
994 */
995 ioapic = mp_find_ioapic(gsi);
996 if (ioapic < 0)
997 return;
998 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
999
1000 /*
1001 * TBD: This check is for faulty timer entries, where the override
1002 * erroneously sets the trigger to level, resulting in a HUGE
1003 * increase of timer interrupts!
1004 */
1005 if ((bus_irq == 0) && (trigger == 3))
1006 trigger = 1;
1007
1008 mp_irq.mp_type = MP_INTSRC;
1009 mp_irq.mp_irqtype = mp_INT;
1010 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1011 mp_irq.mp_srcbus = MP_ISA_BUS;
1012 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1013 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1014 mp_irq.mp_dstirq = pin; /* INTIN# */
1015
1016 save_mp_irq(&mp_irq);
1017 }
1018
1019 void __init mp_config_acpi_legacy_irqs(void)
1020 {
1021 int i;
1022 int ioapic;
1023 unsigned int dstapic;
1024 struct mp_config_intsrc mp_irq;
1025
1026 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1027 /*
1028 * Fabricate the legacy ISA bus (bus #31).
1029 */
1030 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1031 #endif
1032 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1033 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1034
1035 #ifdef CONFIG_X86_ES7000
1036 /*
1037 * Older generations of ES7000 have no legacy identity mappings
1038 */
1039 if (es7000_plat == 1)
1040 return;
1041 #endif
1042
1043 /*
1044 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1045 */
1046 ioapic = mp_find_ioapic(0);
1047 if (ioapic < 0)
1048 return;
1049 dstapic = mp_ioapics[ioapic].mp_apicid;
1050
1051 /*
1052 * Use the default configuration for the IRQs 0-15. Unless
1053 * overridden by (MADT) interrupt source override entries.
1054 */
1055 for (i = 0; i < 16; i++) {
1056 int idx;
1057
1058 for (idx = 0; idx < mp_irq_entries; idx++) {
1059 struct mp_config_intsrc *irq = mp_irqs + idx;
1060
1061 /* Do we already have a mapping for this ISA IRQ? */
1062 if (irq->mp_srcbus == MP_ISA_BUS
1063 && irq->mp_srcbusirq == i)
1064 break;
1065
1066 /* Do we already have a mapping for this IOAPIC pin */
1067 if (irq->mp_dstapic == dstapic &&
1068 irq->mp_dstirq == i)
1069 break;
1070 }
1071
1072 if (idx != mp_irq_entries) {
1073 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1074 continue; /* IRQ already used */
1075 }
1076
1077 mp_irq.mp_type = MP_INTSRC;
1078 mp_irq.mp_irqflag = 0; /* Conforming */
1079 mp_irq.mp_srcbus = MP_ISA_BUS;
1080 mp_irq.mp_dstapic = dstapic;
1081 mp_irq.mp_irqtype = mp_INT;
1082 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1083 mp_irq.mp_dstirq = i;
1084
1085 save_mp_irq(&mp_irq);
1086 }
1087 }
1088
1089 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1090 {
1091 int ioapic;
1092 int ioapic_pin;
1093 #ifdef CONFIG_X86_32
1094 #define MAX_GSI_NUM 4096
1095 #define IRQ_COMPRESSION_START 64
1096
1097 static int pci_irq = IRQ_COMPRESSION_START;
1098 /*
1099 * Mapping between Global System Interrupts, which
1100 * represent all possible interrupts, and IRQs
1101 * assigned to actual devices.
1102 */
1103 static int gsi_to_irq[MAX_GSI_NUM];
1104 #else
1105
1106 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1107 return gsi;
1108 #endif
1109
1110 /* Don't set up the ACPI SCI because it's already set up */
1111 if (acpi_gbl_FADT.sci_interrupt == gsi)
1112 return gsi;
1113
1114 ioapic = mp_find_ioapic(gsi);
1115 if (ioapic < 0) {
1116 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1117 return gsi;
1118 }
1119
1120 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1121
1122 #ifdef CONFIG_X86_32
1123 if (ioapic_renumber_irq)
1124 gsi = ioapic_renumber_irq(ioapic, gsi);
1125 #endif
1126
1127 /*
1128 * Avoid pin reprogramming. PRTs typically include entries
1129 * with redundant pin->gsi mappings (but unique PCI devices);
1130 * we only program the IOAPIC on the first.
1131 */
1132 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1133 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1134 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1135 ioapic_pin);
1136 return gsi;
1137 }
1138 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1139 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n",
1140 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1141 #ifdef CONFIG_X86_32
1142 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1143 #else
1144 return gsi;
1145 #endif
1146 }
1147
1148 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1149 #ifdef CONFIG_X86_32
1150 /*
1151 * For GSI >= 64, use IRQ compression
1152 */
1153 if ((gsi >= IRQ_COMPRESSION_START)
1154 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1155 /*
1156 * For PCI devices assign IRQs in order, avoiding gaps
1157 * due to unused I/O APIC pins.
1158 */
1159 int irq = gsi;
1160 if (gsi < MAX_GSI_NUM) {
1161 /*
1162 * Retain the VIA chipset work-around (gsi > 15), but
1163 * avoid a problem where the 8254 timer (IRQ0) is setup
1164 * via an override (so it's not on pin 0 of the ioapic),
1165 * and at the same time, the pin 0 interrupt is a PCI
1166 * type. The gsi > 15 test could cause these two pins
1167 * to be shared as IRQ0, and they are not shareable.
1168 * So test for this condition, and if necessary, avoid
1169 * the pin collision.
1170 */
1171 gsi = pci_irq++;
1172 /*
1173 * Don't assign IRQ used by ACPI SCI
1174 */
1175 if (gsi == acpi_gbl_FADT.sci_interrupt)
1176 gsi = pci_irq++;
1177 gsi_to_irq[irq] = gsi;
1178 } else {
1179 printk(KERN_ERR "GSI %u is too high\n", gsi);
1180 return gsi;
1181 }
1182 }
1183 #endif
1184 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1185 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1186 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1187 return gsi;
1188 }
1189
1190 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1191 u32 gsi, int triggering, int polarity)
1192 {
1193 #ifdef CONFIG_X86_MPPARSE
1194 struct mp_config_intsrc mp_irq;
1195 int ioapic;
1196
1197 if (!acpi_ioapic)
1198 return 0;
1199
1200 /* print the entry should happen on mptable identically */
1201 mp_irq.mp_type = MP_INTSRC;
1202 mp_irq.mp_irqtype = mp_INT;
1203 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1204 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1205 mp_irq.mp_srcbus = number;
1206 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1207 ioapic = mp_find_ioapic(gsi);
1208 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1209 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1210
1211 save_mp_irq(&mp_irq);
1212 #endif
1213 return 0;
1214 }
1215
1216 /*
1217 * Parse IOAPIC related entries in MADT
1218 * returns 0 on success, < 0 on error
1219 */
1220 static int __init acpi_parse_madt_ioapic_entries(void)
1221 {
1222 int count;
1223
1224 /*
1225 * ACPI interpreter is required to complete interrupt setup,
1226 * so if it is off, don't enumerate the io-apics with ACPI.
1227 * If MPS is present, it will handle them,
1228 * otherwise the system will stay in PIC mode
1229 */
1230 if (acpi_disabled || acpi_noirq) {
1231 return -ENODEV;
1232 }
1233
1234 if (!cpu_has_apic)
1235 return -ENODEV;
1236
1237 /*
1238 * if "noapic" boot option, don't look for IO-APICs
1239 */
1240 if (skip_ioapic_setup) {
1241 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1242 "due to 'noapic' option.\n");
1243 return -ENODEV;
1244 }
1245
1246 count =
1247 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1248 MAX_IO_APICS);
1249 if (!count) {
1250 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1251 return -ENODEV;
1252 } else if (count < 0) {
1253 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1254 return count;
1255 }
1256
1257 count =
1258 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1259 NR_IRQ_VECTORS);
1260 if (count < 0) {
1261 printk(KERN_ERR PREFIX
1262 "Error parsing interrupt source overrides entry\n");
1263 /* TBD: Cleanup to allow fallback to MPS */
1264 return count;
1265 }
1266
1267 /*
1268 * If BIOS did not supply an INT_SRC_OVR for the SCI
1269 * pretend we got one so we can set the SCI flags.
1270 */
1271 if (!acpi_sci_override_gsi)
1272 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1273
1274 /* Fill in identity legacy mapings where no override */
1275 mp_config_acpi_legacy_irqs();
1276
1277 count =
1278 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1279 NR_IRQ_VECTORS);
1280 if (count < 0) {
1281 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1282 /* TBD: Cleanup to allow fallback to MPS */
1283 return count;
1284 }
1285
1286 return 0;
1287 }
1288 #else
1289 static inline int acpi_parse_madt_ioapic_entries(void)
1290 {
1291 return -1;
1292 }
1293 #endif /* !CONFIG_X86_IO_APIC */
1294
1295 static void __init early_acpi_process_madt(void)
1296 {
1297 #ifdef CONFIG_X86_LOCAL_APIC
1298 int error;
1299
1300 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1301
1302 /*
1303 * Parse MADT LAPIC entries
1304 */
1305 error = early_acpi_parse_madt_lapic_addr_ovr();
1306 if (!error) {
1307 acpi_lapic = 1;
1308 smp_found_config = 1;
1309 }
1310 if (error == -EINVAL) {
1311 /*
1312 * Dell Precision Workstation 410, 610 come here.
1313 */
1314 printk(KERN_ERR PREFIX
1315 "Invalid BIOS MADT, disabling ACPI\n");
1316 disable_acpi();
1317 }
1318 }
1319 #endif
1320 }
1321
1322 static void __init acpi_process_madt(void)
1323 {
1324 #ifdef CONFIG_X86_LOCAL_APIC
1325 int error;
1326
1327 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1328
1329 /*
1330 * Parse MADT LAPIC entries
1331 */
1332 error = acpi_parse_madt_lapic_entries();
1333 if (!error) {
1334 acpi_lapic = 1;
1335
1336 #ifdef CONFIG_X86_GENERICARCH
1337 generic_bigsmp_probe();
1338 #endif
1339 /*
1340 * Parse MADT IO-APIC entries
1341 */
1342 error = acpi_parse_madt_ioapic_entries();
1343 if (!error) {
1344 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1345 acpi_irq_balance_set(NULL);
1346 acpi_ioapic = 1;
1347
1348 smp_found_config = 1;
1349 #ifdef CONFIG_X86_32
1350 setup_apic_routing();
1351 #endif
1352 }
1353 }
1354 if (error == -EINVAL) {
1355 /*
1356 * Dell Precision Workstation 410, 610 come here.
1357 */
1358 printk(KERN_ERR PREFIX
1359 "Invalid BIOS MADT, disabling ACPI\n");
1360 disable_acpi();
1361 }
1362 }
1363 #endif
1364 return;
1365 }
1366
1367 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1368 {
1369 if (!acpi_force) {
1370 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1371 d->ident);
1372 acpi_noirq_set();
1373 }
1374 return 0;
1375 }
1376
1377 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1378 {
1379 if (!acpi_force) {
1380 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1381 d->ident);
1382 acpi_disable_pci();
1383 }
1384 return 0;
1385 }
1386
1387 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1388 {
1389 if (!acpi_force) {
1390 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1391 disable_acpi();
1392 } else {
1393 printk(KERN_NOTICE
1394 "Warning: DMI blacklist says broken, but acpi forced\n");
1395 }
1396 return 0;
1397 }
1398
1399 /*
1400 * Limit ACPI to CPU enumeration for HT
1401 */
1402 static int __init force_acpi_ht(const struct dmi_system_id *d)
1403 {
1404 if (!acpi_force) {
1405 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1406 d->ident);
1407 disable_acpi();
1408 acpi_ht = 1;
1409 } else {
1410 printk(KERN_NOTICE
1411 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1412 }
1413 return 0;
1414 }
1415
1416 /*
1417 * Force ignoring BIOS IRQ0 pin2 override
1418 */
1419 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1420 {
1421 /*
1422 * The ati_ixp4x0_rev() early PCI quirk should have set
1423 * the acpi_skip_timer_override flag already:
1424 */
1425 if (!acpi_skip_timer_override) {
1426 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1427 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1428 d->ident);
1429 acpi_skip_timer_override = 1;
1430 }
1431 return 0;
1432 }
1433
1434 /*
1435 * If your system is blacklisted here, but you find that acpi=force
1436 * works for you, please contact acpi-devel@sourceforge.net
1437 */
1438 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1439 /*
1440 * Boxes that need ACPI disabled
1441 */
1442 {
1443 .callback = dmi_disable_acpi,
1444 .ident = "IBM Thinkpad",
1445 .matches = {
1446 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1447 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1448 },
1449 },
1450
1451 /*
1452 * Boxes that need acpi=ht
1453 */
1454 {
1455 .callback = force_acpi_ht,
1456 .ident = "FSC Primergy T850",
1457 .matches = {
1458 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1459 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1460 },
1461 },
1462 {
1463 .callback = force_acpi_ht,
1464 .ident = "HP VISUALIZE NT Workstation",
1465 .matches = {
1466 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1467 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1468 },
1469 },
1470 {
1471 .callback = force_acpi_ht,
1472 .ident = "Compaq Workstation W8000",
1473 .matches = {
1474 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1475 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1476 },
1477 },
1478 {
1479 .callback = force_acpi_ht,
1480 .ident = "ASUS P4B266",
1481 .matches = {
1482 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1483 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1484 },
1485 },
1486 {
1487 .callback = force_acpi_ht,
1488 .ident = "ASUS P2B-DS",
1489 .matches = {
1490 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1491 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1492 },
1493 },
1494 {
1495 .callback = force_acpi_ht,
1496 .ident = "ASUS CUR-DLS",
1497 .matches = {
1498 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1499 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1500 },
1501 },
1502 {
1503 .callback = force_acpi_ht,
1504 .ident = "ABIT i440BX-W83977",
1505 .matches = {
1506 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1507 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1508 },
1509 },
1510 {
1511 .callback = force_acpi_ht,
1512 .ident = "IBM Bladecenter",
1513 .matches = {
1514 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1515 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1516 },
1517 },
1518 {
1519 .callback = force_acpi_ht,
1520 .ident = "IBM eServer xSeries 360",
1521 .matches = {
1522 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1523 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1524 },
1525 },
1526 {
1527 .callback = force_acpi_ht,
1528 .ident = "IBM eserver xSeries 330",
1529 .matches = {
1530 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1531 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1532 },
1533 },
1534 {
1535 .callback = force_acpi_ht,
1536 .ident = "IBM eserver xSeries 440",
1537 .matches = {
1538 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1539 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1540 },
1541 },
1542
1543 /*
1544 * Boxes that need ACPI PCI IRQ routing disabled
1545 */
1546 {
1547 .callback = disable_acpi_irq,
1548 .ident = "ASUS A7V",
1549 .matches = {
1550 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1551 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1552 /* newer BIOS, Revision 1011, does work */
1553 DMI_MATCH(DMI_BIOS_VERSION,
1554 "ASUS A7V ACPI BIOS Revision 1007"),
1555 },
1556 },
1557 {
1558 /*
1559 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1560 * for LPC bridge, which is needed for the PCI
1561 * interrupt links to work. DSDT fix is in bug 5966.
1562 * 2645, 2646 model numbers are shared with 600/600E/600X
1563 */
1564 .callback = disable_acpi_irq,
1565 .ident = "IBM Thinkpad 600 Series 2645",
1566 .matches = {
1567 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1568 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1569 },
1570 },
1571 {
1572 .callback = disable_acpi_irq,
1573 .ident = "IBM Thinkpad 600 Series 2646",
1574 .matches = {
1575 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1576 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1577 },
1578 },
1579 /*
1580 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1581 */
1582 { /* _BBN 0 bug */
1583 .callback = disable_acpi_pci,
1584 .ident = "ASUS PR-DLS",
1585 .matches = {
1586 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1587 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1588 DMI_MATCH(DMI_BIOS_VERSION,
1589 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1590 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1591 },
1592 },
1593 {
1594 .callback = disable_acpi_pci,
1595 .ident = "Acer TravelMate 36x Laptop",
1596 .matches = {
1597 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1598 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1599 },
1600 },
1601 /*
1602 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1603 * which includes some code which overrides all temperature
1604 * trip points to 16C if the INTIN2 input of the I/O APIC
1605 * is enabled. This input is incorrectly designated the
1606 * ISA IRQ 0 via an interrupt source override even though
1607 * it is wired to the output of the master 8259A and INTIN0
1608 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1609 * override in that cases.
1610 */
1611 {
1612 .callback = dmi_ignore_irq0_timer_override,
1613 .ident = "HP nx6115 laptop",
1614 .matches = {
1615 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1616 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1617 },
1618 },
1619 {
1620 .callback = dmi_ignore_irq0_timer_override,
1621 .ident = "HP NX6125 laptop",
1622 .matches = {
1623 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1624 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1625 },
1626 },
1627 {
1628 .callback = dmi_ignore_irq0_timer_override,
1629 .ident = "HP NX6325 laptop",
1630 .matches = {
1631 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1632 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1633 },
1634 },
1635 {
1636 .callback = dmi_ignore_irq0_timer_override,
1637 .ident = "HP 6715b laptop",
1638 .matches = {
1639 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1640 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1641 },
1642 },
1643 {}
1644 };
1645
1646 /*
1647 * acpi_boot_table_init() and acpi_boot_init()
1648 * called from setup_arch(), always.
1649 * 1. checksums all tables
1650 * 2. enumerates lapics
1651 * 3. enumerates io-apics
1652 *
1653 * acpi_table_init() is separate to allow reading SRAT without
1654 * other side effects.
1655 *
1656 * side effects of acpi_boot_init:
1657 * acpi_lapic = 1 if LAPIC found
1658 * acpi_ioapic = 1 if IOAPIC found
1659 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1660 * if acpi_blacklisted() acpi_disabled = 1;
1661 * acpi_irq_model=...
1662 * ...
1663 *
1664 * return value: (currently ignored)
1665 * 0: success
1666 * !0: failure
1667 */
1668
1669 int __init acpi_boot_table_init(void)
1670 {
1671 int error;
1672
1673 dmi_check_system(acpi_dmi_table);
1674
1675 /*
1676 * If acpi_disabled, bail out
1677 * One exception: acpi=ht continues far enough to enumerate LAPICs
1678 */
1679 if (acpi_disabled && !acpi_ht)
1680 return 1;
1681
1682 /*
1683 * Initialize the ACPI boot-time table parser.
1684 */
1685 error = acpi_table_init();
1686 if (error) {
1687 disable_acpi();
1688 return error;
1689 }
1690
1691 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1692
1693 /*
1694 * blacklist may disable ACPI entirely
1695 */
1696 error = acpi_blacklisted();
1697 if (error) {
1698 if (acpi_force) {
1699 printk(KERN_WARNING PREFIX "acpi=force override\n");
1700 } else {
1701 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1702 disable_acpi();
1703 return error;
1704 }
1705 }
1706
1707 return 0;
1708 }
1709
1710 int __init early_acpi_boot_init(void)
1711 {
1712 /*
1713 * If acpi_disabled, bail out
1714 * One exception: acpi=ht continues far enough to enumerate LAPICs
1715 */
1716 if (acpi_disabled && !acpi_ht)
1717 return 1;
1718
1719 /*
1720 * Process the Multiple APIC Description Table (MADT), if present
1721 */
1722 early_acpi_process_madt();
1723
1724 return 0;
1725 }
1726
1727 int __init acpi_boot_init(void)
1728 {
1729 /*
1730 * If acpi_disabled, bail out
1731 * One exception: acpi=ht continues far enough to enumerate LAPICs
1732 */
1733 if (acpi_disabled && !acpi_ht)
1734 return 1;
1735
1736 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1737
1738 /*
1739 * set sci_int and PM timer address
1740 */
1741 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1742
1743 /*
1744 * Process the Multiple APIC Description Table (MADT), if present
1745 */
1746 acpi_process_madt();
1747
1748 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1749
1750 return 0;
1751 }
1752
1753 static int __init parse_acpi(char *arg)
1754 {
1755 if (!arg)
1756 return -EINVAL;
1757
1758 /* "acpi=off" disables both ACPI table parsing and interpreter */
1759 if (strcmp(arg, "off") == 0) {
1760 disable_acpi();
1761 }
1762 /* acpi=force to over-ride black-list */
1763 else if (strcmp(arg, "force") == 0) {
1764 acpi_force = 1;
1765 acpi_ht = 1;
1766 acpi_disabled = 0;
1767 }
1768 /* acpi=strict disables out-of-spec workarounds */
1769 else if (strcmp(arg, "strict") == 0) {
1770 acpi_strict = 1;
1771 }
1772 /* Limit ACPI just to boot-time to enable HT */
1773 else if (strcmp(arg, "ht") == 0) {
1774 if (!acpi_force)
1775 disable_acpi();
1776 acpi_ht = 1;
1777 }
1778 /* "acpi=noirq" disables ACPI interrupt routing */
1779 else if (strcmp(arg, "noirq") == 0) {
1780 acpi_noirq_set();
1781 } else {
1782 /* Core will printk when we return error. */
1783 return -EINVAL;
1784 }
1785 return 0;
1786 }
1787 early_param("acpi", parse_acpi);
1788
1789 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1790 static int __init parse_pci(char *arg)
1791 {
1792 if (arg && strcmp(arg, "noacpi") == 0)
1793 acpi_disable_pci();
1794 return 0;
1795 }
1796 early_param("pci", parse_pci);
1797
1798 int __init acpi_mps_check(void)
1799 {
1800 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1801 /* mptable code is not built-in*/
1802 if (acpi_disabled || acpi_noirq) {
1803 printk(KERN_WARNING "MPS support code is not built-in.\n"
1804 "Using acpi=off or acpi=noirq or pci=noacpi "
1805 "may have problem\n");
1806 return 1;
1807 }
1808 #endif
1809 return 0;
1810 }
1811
1812 #ifdef CONFIG_X86_IO_APIC
1813 static int __init parse_acpi_skip_timer_override(char *arg)
1814 {
1815 acpi_skip_timer_override = 1;
1816 return 0;
1817 }
1818 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1819
1820 static int __init parse_acpi_use_timer_override(char *arg)
1821 {
1822 acpi_use_timer_override = 1;
1823 return 0;
1824 }
1825 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1826 #endif /* CONFIG_X86_IO_APIC */
1827
1828 static int __init setup_acpi_sci(char *s)
1829 {
1830 if (!s)
1831 return -EINVAL;
1832 if (!strcmp(s, "edge"))
1833 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1834 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1835 else if (!strcmp(s, "level"))
1836 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1837 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1838 else if (!strcmp(s, "high"))
1839 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1840 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1841 else if (!strcmp(s, "low"))
1842 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1843 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1844 else
1845 return -EINVAL;
1846 return 0;
1847 }
1848 early_param("acpi_sci", setup_acpi_sci);
1849
1850 int __acpi_acquire_global_lock(unsigned int *lock)
1851 {
1852 unsigned int old, new, val;
1853 do {
1854 old = *lock;
1855 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1856 val = cmpxchg(lock, old, new);
1857 } while (unlikely (val != old));
1858 return (new < 3) ? -1 : 0;
1859 }
1860
1861 int __acpi_release_global_lock(unsigned int *lock)
1862 {
1863 unsigned int old, new, val;
1864 do {
1865 old = *lock;
1866 new = old & ~0x3;
1867 val = cmpxchg(lock, old, new);
1868 } while (unlikely (val != old));
1869 return old & 0x1;
1870 }
Linux kernel - Deliverables
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