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Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
[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 #ifdef CONFIG_X86_32
256 if (boot_cpu_physical_apicid != -1U)
257 ver = apic_version[boot_cpu_physical_apicid];
258 #endif
259
260 generic_processor_info(id, ver);
261 }
262
263 static int __init
264 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
265 {
266 struct acpi_madt_local_apic *processor = NULL;
267
268 processor = (struct acpi_madt_local_apic *)header;
269
270 if (BAD_MADT_ENTRY(processor, end))
271 return -EINVAL;
272
273 acpi_table_print_madt_entry(header);
274
275 /*
276 * We need to register disabled CPU as well to permit
277 * counting disabled CPUs. This allows us to size
278 * cpus_possible_map more accurately, to permit
279 * to not preallocating memory for all NR_CPUS
280 * when we use CPU hotplug.
281 */
282 acpi_register_lapic(processor->id, /* APIC ID */
283 processor->lapic_flags & ACPI_MADT_ENABLED);
284
285 return 0;
286 }
287
288 static int __init
289 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
290 {
291 struct acpi_madt_local_sapic *processor = NULL;
292
293 processor = (struct acpi_madt_local_sapic *)header;
294
295 if (BAD_MADT_ENTRY(processor, end))
296 return -EINVAL;
297
298 acpi_table_print_madt_entry(header);
299
300 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
301 processor->lapic_flags & ACPI_MADT_ENABLED);
302
303 return 0;
304 }
305
306 static int __init
307 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
308 const unsigned long end)
309 {
310 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
311
312 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
313
314 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
315 return -EINVAL;
316
317 acpi_lapic_addr = lapic_addr_ovr->address;
318
319 return 0;
320 }
321
322 static int __init
323 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
324 {
325 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
326
327 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
328
329 if (BAD_MADT_ENTRY(lapic_nmi, end))
330 return -EINVAL;
331
332 acpi_table_print_madt_entry(header);
333
334 if (lapic_nmi->lint != 1)
335 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
336
337 return 0;
338 }
339
340 #endif /*CONFIG_X86_LOCAL_APIC */
341
342 #ifdef CONFIG_X86_IO_APIC
343
344 static int __init
345 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
346 {
347 struct acpi_madt_io_apic *ioapic = NULL;
348
349 ioapic = (struct acpi_madt_io_apic *)header;
350
351 if (BAD_MADT_ENTRY(ioapic, end))
352 return -EINVAL;
353
354 acpi_table_print_madt_entry(header);
355
356 mp_register_ioapic(ioapic->id,
357 ioapic->address, ioapic->global_irq_base);
358
359 return 0;
360 }
361
362 /*
363 * Parse Interrupt Source Override for the ACPI SCI
364 */
365 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
366 {
367 if (trigger == 0) /* compatible SCI trigger is level */
368 trigger = 3;
369
370 if (polarity == 0) /* compatible SCI polarity is low */
371 polarity = 3;
372
373 /* Command-line over-ride via acpi_sci= */
374 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
375 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
376
377 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
378 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
379
380 /*
381 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
382 * If GSI is < 16, this will update its flags,
383 * else it will create a new mp_irqs[] entry.
384 */
385 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
386
387 /*
388 * stash over-ride to indicate we've been here
389 * and for later update of acpi_gbl_FADT
390 */
391 acpi_sci_override_gsi = gsi;
392 return;
393 }
394
395 static int __init
396 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
397 const unsigned long end)
398 {
399 struct acpi_madt_interrupt_override *intsrc = NULL;
400
401 intsrc = (struct acpi_madt_interrupt_override *)header;
402
403 if (BAD_MADT_ENTRY(intsrc, end))
404 return -EINVAL;
405
406 acpi_table_print_madt_entry(header);
407
408 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
409 acpi_sci_ioapic_setup(intsrc->global_irq,
410 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
411 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
412 return 0;
413 }
414
415 if (acpi_skip_timer_override &&
416 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
417 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
418 return 0;
419 }
420
421 mp_override_legacy_irq(intsrc->source_irq,
422 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
423 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
424 intsrc->global_irq);
425
426 return 0;
427 }
428
429 static int __init
430 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
431 {
432 struct acpi_madt_nmi_source *nmi_src = NULL;
433
434 nmi_src = (struct acpi_madt_nmi_source *)header;
435
436 if (BAD_MADT_ENTRY(nmi_src, end))
437 return -EINVAL;
438
439 acpi_table_print_madt_entry(header);
440
441 /* TBD: Support nimsrc entries? */
442
443 return 0;
444 }
445
446 #endif /* CONFIG_X86_IO_APIC */
447
448 /*
449 * acpi_pic_sci_set_trigger()
450 *
451 * use ELCR to set PIC-mode trigger type for SCI
452 *
453 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
454 * it may require Edge Trigger -- use "acpi_sci=edge"
455 *
456 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
457 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
458 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
459 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
460 */
461
462 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
463 {
464 unsigned int mask = 1 << irq;
465 unsigned int old, new;
466
467 /* Real old ELCR mask */
468 old = inb(0x4d0) | (inb(0x4d1) << 8);
469
470 /*
471 * If we use ACPI to set PCI IRQs, then we should clear ELCR
472 * since we will set it correctly as we enable the PCI irq
473 * routing.
474 */
475 new = acpi_noirq ? old : 0;
476
477 /*
478 * Update SCI information in the ELCR, it isn't in the PCI
479 * routing tables..
480 */
481 switch (trigger) {
482 case 1: /* Edge - clear */
483 new &= ~mask;
484 break;
485 case 3: /* Level - set */
486 new |= mask;
487 break;
488 }
489
490 if (old == new)
491 return;
492
493 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
494 outb(new, 0x4d0);
495 outb(new >> 8, 0x4d1);
496 }
497
498 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
499 {
500 *irq = gsi;
501 return 0;
502 }
503
504 /*
505 * success: return IRQ number (>=0)
506 * failure: return < 0
507 */
508 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
509 {
510 unsigned int irq;
511 unsigned int plat_gsi = gsi;
512
513 #ifdef CONFIG_PCI
514 /*
515 * Make sure all (legacy) PCI IRQs are set as level-triggered.
516 */
517 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
518 if (triggering == ACPI_LEVEL_SENSITIVE)
519 eisa_set_level_irq(gsi);
520 }
521 #endif
522
523 #ifdef CONFIG_X86_IO_APIC
524 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
525 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
526 }
527 #endif
528 acpi_gsi_to_irq(plat_gsi, &irq);
529 return irq;
530 }
531
532 /*
533 * ACPI based hotplug support for CPU
534 */
535 #ifdef CONFIG_ACPI_HOTPLUG_CPU
536
537 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
538 {
539 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
540 union acpi_object *obj;
541 struct acpi_madt_local_apic *lapic;
542 cpumask_t tmp_map, new_map;
543 u8 physid;
544 int cpu;
545
546 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
547 return -EINVAL;
548
549 if (!buffer.length || !buffer.pointer)
550 return -EINVAL;
551
552 obj = buffer.pointer;
553 if (obj->type != ACPI_TYPE_BUFFER ||
554 obj->buffer.length < sizeof(*lapic)) {
555 kfree(buffer.pointer);
556 return -EINVAL;
557 }
558
559 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
560
561 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
562 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
563 kfree(buffer.pointer);
564 return -EINVAL;
565 }
566
567 physid = lapic->id;
568
569 kfree(buffer.pointer);
570 buffer.length = ACPI_ALLOCATE_BUFFER;
571 buffer.pointer = NULL;
572
573 tmp_map = cpu_present_map;
574 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
575
576 /*
577 * If mp_register_lapic successfully generates a new logical cpu
578 * number, then the following will get us exactly what was mapped
579 */
580 cpus_andnot(new_map, cpu_present_map, tmp_map);
581 if (cpus_empty(new_map)) {
582 printk ("Unable to map lapic to logical cpu number\n");
583 return -EINVAL;
584 }
585
586 cpu = first_cpu(new_map);
587
588 *pcpu = cpu;
589 return 0;
590 }
591
592 /* wrapper to silence section mismatch warning */
593 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
594 {
595 return _acpi_map_lsapic(handle, pcpu);
596 }
597 EXPORT_SYMBOL(acpi_map_lsapic);
598
599 int acpi_unmap_lsapic(int cpu)
600 {
601 per_cpu(x86_cpu_to_apicid, cpu) = -1;
602 cpu_clear(cpu, cpu_present_map);
603 num_processors--;
604
605 return (0);
606 }
607
608 EXPORT_SYMBOL(acpi_unmap_lsapic);
609 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
610
611 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
612 {
613 /* TBD */
614 return -EINVAL;
615 }
616
617 EXPORT_SYMBOL(acpi_register_ioapic);
618
619 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
620 {
621 /* TBD */
622 return -EINVAL;
623 }
624
625 EXPORT_SYMBOL(acpi_unregister_ioapic);
626
627 static int __init acpi_parse_sbf(struct acpi_table_header *table)
628 {
629 struct acpi_table_boot *sb;
630
631 sb = (struct acpi_table_boot *)table;
632 if (!sb) {
633 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
634 return -ENODEV;
635 }
636
637 sbf_port = sb->cmos_index; /* Save CMOS port */
638
639 return 0;
640 }
641
642 #ifdef CONFIG_HPET_TIMER
643 #include <asm/hpet.h>
644
645 static struct __initdata resource *hpet_res;
646
647 static int __init acpi_parse_hpet(struct acpi_table_header *table)
648 {
649 struct acpi_table_hpet *hpet_tbl;
650
651 hpet_tbl = (struct acpi_table_hpet *)table;
652 if (!hpet_tbl) {
653 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
654 return -ENODEV;
655 }
656
657 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
658 printk(KERN_WARNING PREFIX "HPET timers must be located in "
659 "memory.\n");
660 return -1;
661 }
662
663 hpet_address = hpet_tbl->address.address;
664
665 /*
666 * Some broken BIOSes advertise HPET at 0x0. We really do not
667 * want to allocate a resource there.
668 */
669 if (!hpet_address) {
670 printk(KERN_WARNING PREFIX
671 "HPET id: %#x base: %#lx is invalid\n",
672 hpet_tbl->id, hpet_address);
673 return 0;
674 }
675 #ifdef CONFIG_X86_64
676 /*
677 * Some even more broken BIOSes advertise HPET at
678 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
679 * some noise:
680 */
681 if (hpet_address == 0xfed0000000000000UL) {
682 if (!hpet_force_user) {
683 printk(KERN_WARNING PREFIX "HPET id: %#x "
684 "base: 0xfed0000000000000 is bogus\n "
685 "try hpet=force on the kernel command line to "
686 "fix it up to 0xfed00000.\n", hpet_tbl->id);
687 hpet_address = 0;
688 return 0;
689 }
690 printk(KERN_WARNING PREFIX
691 "HPET id: %#x base: 0xfed0000000000000 fixed up "
692 "to 0xfed00000.\n", hpet_tbl->id);
693 hpet_address >>= 32;
694 }
695 #endif
696 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
697 hpet_tbl->id, hpet_address);
698
699 /*
700 * Allocate and initialize the HPET firmware resource for adding into
701 * the resource tree during the lateinit timeframe.
702 */
703 #define HPET_RESOURCE_NAME_SIZE 9
704 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
705
706 hpet_res->name = (void *)&hpet_res[1];
707 hpet_res->flags = IORESOURCE_MEM;
708 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
709 hpet_tbl->sequence);
710
711 hpet_res->start = hpet_address;
712 hpet_res->end = hpet_address + (1 * 1024) - 1;
713
714 return 0;
715 }
716
717 /*
718 * hpet_insert_resource inserts the HPET resources used into the resource
719 * tree.
720 */
721 static __init int hpet_insert_resource(void)
722 {
723 if (!hpet_res)
724 return 1;
725
726 return insert_resource(&iomem_resource, hpet_res);
727 }
728
729 late_initcall(hpet_insert_resource);
730
731 #else
732 #define acpi_parse_hpet NULL
733 #endif
734
735 static int __init acpi_parse_fadt(struct acpi_table_header *table)
736 {
737
738 #ifdef CONFIG_X86_PM_TIMER
739 /* detect the location of the ACPI PM Timer */
740 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
741 /* FADT rev. 2 */
742 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
743 ACPI_ADR_SPACE_SYSTEM_IO)
744 return 0;
745
746 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
747 /*
748 * "X" fields are optional extensions to the original V1.0
749 * fields, so we must selectively expand V1.0 fields if the
750 * corresponding X field is zero.
751 */
752 if (!pmtmr_ioport)
753 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
754 } else {
755 /* FADT rev. 1 */
756 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
757 }
758 if (pmtmr_ioport)
759 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
760 pmtmr_ioport);
761 #endif
762 return 0;
763 }
764
765 #ifdef CONFIG_X86_LOCAL_APIC
766 /*
767 * Parse LAPIC entries in MADT
768 * returns 0 on success, < 0 on error
769 */
770
771 static void __init acpi_register_lapic_address(unsigned long address)
772 {
773 mp_lapic_addr = address;
774
775 set_fixmap_nocache(FIX_APIC_BASE, address);
776 if (boot_cpu_physical_apicid == -1U) {
777 boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id());
778 #ifdef CONFIG_X86_32
779 apic_version[boot_cpu_physical_apicid] =
780 GET_APIC_VERSION(apic_read(APIC_LVR));
781 #endif
782 }
783 }
784
785 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
786 {
787 int count;
788
789 if (!cpu_has_apic)
790 return -ENODEV;
791
792 /*
793 * Note that the LAPIC address is obtained from the MADT (32-bit value)
794 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
795 */
796
797 count =
798 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
799 acpi_parse_lapic_addr_ovr, 0);
800 if (count < 0) {
801 printk(KERN_ERR PREFIX
802 "Error parsing LAPIC address override entry\n");
803 return count;
804 }
805
806 acpi_register_lapic_address(acpi_lapic_addr);
807
808 return count;
809 }
810
811 static int __init acpi_parse_madt_lapic_entries(void)
812 {
813 int count;
814
815 if (!cpu_has_apic)
816 return -ENODEV;
817
818 /*
819 * Note that the LAPIC address is obtained from the MADT (32-bit value)
820 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
821 */
822
823 count =
824 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
825 acpi_parse_lapic_addr_ovr, 0);
826 if (count < 0) {
827 printk(KERN_ERR PREFIX
828 "Error parsing LAPIC address override entry\n");
829 return count;
830 }
831
832 acpi_register_lapic_address(acpi_lapic_addr);
833
834 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
835 acpi_parse_sapic, MAX_APICS);
836
837 if (!count)
838 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
839 acpi_parse_lapic, MAX_APICS);
840 if (!count) {
841 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
842 /* TBD: Cleanup to allow fallback to MPS */
843 return -ENODEV;
844 } else if (count < 0) {
845 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
846 /* TBD: Cleanup to allow fallback to MPS */
847 return count;
848 }
849
850 count =
851 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
852 if (count < 0) {
853 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
854 /* TBD: Cleanup to allow fallback to MPS */
855 return count;
856 }
857 return 0;
858 }
859 #endif /* CONFIG_X86_LOCAL_APIC */
860
861 #ifdef CONFIG_X86_IO_APIC
862 #define MP_ISA_BUS 0
863
864 #ifdef CONFIG_X86_ES7000
865 extern int es7000_plat;
866 #endif
867
868 static struct {
869 int apic_id;
870 int gsi_base;
871 int gsi_end;
872 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
873 } mp_ioapic_routing[MAX_IO_APICS];
874
875 static int mp_find_ioapic(int gsi)
876 {
877 int i = 0;
878
879 /* Find the IOAPIC that manages this GSI. */
880 for (i = 0; i < nr_ioapics; i++) {
881 if ((gsi >= mp_ioapic_routing[i].gsi_base)
882 && (gsi <= mp_ioapic_routing[i].gsi_end))
883 return i;
884 }
885
886 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
887 return -1;
888 }
889
890 static u8 __init uniq_ioapic_id(u8 id)
891 {
892 #ifdef CONFIG_X86_32
893 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
894 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
895 return io_apic_get_unique_id(nr_ioapics, id);
896 else
897 return id;
898 #else
899 int i;
900 DECLARE_BITMAP(used, 256);
901 bitmap_zero(used, 256);
902 for (i = 0; i < nr_ioapics; i++) {
903 struct mp_config_ioapic *ia = &mp_ioapics[i];
904 __set_bit(ia->mp_apicid, used);
905 }
906 if (!test_bit(id, used))
907 return id;
908 return find_first_zero_bit(used, 256);
909 #endif
910 }
911
912 static int bad_ioapic(unsigned long address)
913 {
914 if (nr_ioapics >= MAX_IO_APICS) {
915 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
916 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
917 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
918 }
919 if (!address) {
920 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
921 " found in table, skipping!\n");
922 return 1;
923 }
924 return 0;
925 }
926
927 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
928 {
929 int idx = 0;
930
931 if (bad_ioapic(address))
932 return;
933
934 idx = nr_ioapics;
935
936 mp_ioapics[idx].mp_type = MP_IOAPIC;
937 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
938 mp_ioapics[idx].mp_apicaddr = address;
939
940 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
941 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
942 #ifdef CONFIG_X86_32
943 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
944 #else
945 mp_ioapics[idx].mp_apicver = 0;
946 #endif
947 /*
948 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
949 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
950 */
951 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
952 mp_ioapic_routing[idx].gsi_base = gsi_base;
953 mp_ioapic_routing[idx].gsi_end = gsi_base +
954 io_apic_get_redir_entries(idx);
955
956 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
957 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
958 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
959 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
960
961 nr_ioapics++;
962 }
963
964 static void assign_to_mp_irq(struct mp_config_intsrc *m,
965 struct mp_config_intsrc *mp_irq)
966 {
967 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
968 }
969
970 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
971 struct mp_config_intsrc *m)
972 {
973 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
974 }
975
976 static void save_mp_irq(struct mp_config_intsrc *m)
977 {
978 int i;
979
980 for (i = 0; i < mp_irq_entries; i++) {
981 if (!mp_irq_cmp(&mp_irqs[i], m))
982 return;
983 }
984
985 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
986 if (++mp_irq_entries == MAX_IRQ_SOURCES)
987 panic("Max # of irq sources exceeded!!\n");
988 }
989
990 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
991 {
992 int ioapic;
993 int pin;
994 struct mp_config_intsrc mp_irq;
995
996 /*
997 * Convert 'gsi' to 'ioapic.pin'.
998 */
999 ioapic = mp_find_ioapic(gsi);
1000 if (ioapic < 0)
1001 return;
1002 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1003
1004 /*
1005 * TBD: This check is for faulty timer entries, where the override
1006 * erroneously sets the trigger to level, resulting in a HUGE
1007 * increase of timer interrupts!
1008 */
1009 if ((bus_irq == 0) && (trigger == 3))
1010 trigger = 1;
1011
1012 mp_irq.mp_type = MP_INTSRC;
1013 mp_irq.mp_irqtype = mp_INT;
1014 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1015 mp_irq.mp_srcbus = MP_ISA_BUS;
1016 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1017 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1018 mp_irq.mp_dstirq = pin; /* INTIN# */
1019
1020 save_mp_irq(&mp_irq);
1021 }
1022
1023 void __init mp_config_acpi_legacy_irqs(void)
1024 {
1025 int i;
1026 int ioapic;
1027 unsigned int dstapic;
1028 struct mp_config_intsrc mp_irq;
1029
1030 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1031 /*
1032 * Fabricate the legacy ISA bus (bus #31).
1033 */
1034 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1035 #endif
1036 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1037 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1038
1039 #ifdef CONFIG_X86_ES7000
1040 /*
1041 * Older generations of ES7000 have no legacy identity mappings
1042 */
1043 if (es7000_plat == 1)
1044 return;
1045 #endif
1046
1047 /*
1048 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1049 */
1050 ioapic = mp_find_ioapic(0);
1051 if (ioapic < 0)
1052 return;
1053 dstapic = mp_ioapics[ioapic].mp_apicid;
1054
1055 /*
1056 * Use the default configuration for the IRQs 0-15. Unless
1057 * overridden by (MADT) interrupt source override entries.
1058 */
1059 for (i = 0; i < 16; i++) {
1060 int idx;
1061
1062 for (idx = 0; idx < mp_irq_entries; idx++) {
1063 struct mp_config_intsrc *irq = mp_irqs + idx;
1064
1065 /* Do we already have a mapping for this ISA IRQ? */
1066 if (irq->mp_srcbus == MP_ISA_BUS
1067 && irq->mp_srcbusirq == i)
1068 break;
1069
1070 /* Do we already have a mapping for this IOAPIC pin */
1071 if (irq->mp_dstapic == dstapic &&
1072 irq->mp_dstirq == i)
1073 break;
1074 }
1075
1076 if (idx != mp_irq_entries) {
1077 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1078 continue; /* IRQ already used */
1079 }
1080
1081 mp_irq.mp_type = MP_INTSRC;
1082 mp_irq.mp_irqflag = 0; /* Conforming */
1083 mp_irq.mp_srcbus = MP_ISA_BUS;
1084 mp_irq.mp_dstapic = dstapic;
1085 mp_irq.mp_irqtype = mp_INT;
1086 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1087 mp_irq.mp_dstirq = i;
1088
1089 save_mp_irq(&mp_irq);
1090 }
1091 }
1092
1093 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1094 {
1095 int ioapic;
1096 int ioapic_pin;
1097 #ifdef CONFIG_X86_32
1098 #define MAX_GSI_NUM 4096
1099 #define IRQ_COMPRESSION_START 64
1100
1101 static int pci_irq = IRQ_COMPRESSION_START;
1102 /*
1103 * Mapping between Global System Interrupts, which
1104 * represent all possible interrupts, and IRQs
1105 * assigned to actual devices.
1106 */
1107 static int gsi_to_irq[MAX_GSI_NUM];
1108 #else
1109
1110 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1111 return gsi;
1112 #endif
1113
1114 /* Don't set up the ACPI SCI because it's already set up */
1115 if (acpi_gbl_FADT.sci_interrupt == gsi)
1116 return gsi;
1117
1118 ioapic = mp_find_ioapic(gsi);
1119 if (ioapic < 0) {
1120 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1121 return gsi;
1122 }
1123
1124 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1125
1126 #ifdef CONFIG_X86_32
1127 if (ioapic_renumber_irq)
1128 gsi = ioapic_renumber_irq(ioapic, gsi);
1129 #endif
1130
1131 /*
1132 * Avoid pin reprogramming. PRTs typically include entries
1133 * with redundant pin->gsi mappings (but unique PCI devices);
1134 * we only program the IOAPIC on the first.
1135 */
1136 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1137 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1138 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1139 ioapic_pin);
1140 return gsi;
1141 }
1142 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1143 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n",
1144 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1145 #ifdef CONFIG_X86_32
1146 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1147 #else
1148 return gsi;
1149 #endif
1150 }
1151
1152 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1153 #ifdef CONFIG_X86_32
1154 /*
1155 * For GSI >= 64, use IRQ compression
1156 */
1157 if ((gsi >= IRQ_COMPRESSION_START)
1158 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1159 /*
1160 * For PCI devices assign IRQs in order, avoiding gaps
1161 * due to unused I/O APIC pins.
1162 */
1163 int irq = gsi;
1164 if (gsi < MAX_GSI_NUM) {
1165 /*
1166 * Retain the VIA chipset work-around (gsi > 15), but
1167 * avoid a problem where the 8254 timer (IRQ0) is setup
1168 * via an override (so it's not on pin 0 of the ioapic),
1169 * and at the same time, the pin 0 interrupt is a PCI
1170 * type. The gsi > 15 test could cause these two pins
1171 * to be shared as IRQ0, and they are not shareable.
1172 * So test for this condition, and if necessary, avoid
1173 * the pin collision.
1174 */
1175 gsi = pci_irq++;
1176 /*
1177 * Don't assign IRQ used by ACPI SCI
1178 */
1179 if (gsi == acpi_gbl_FADT.sci_interrupt)
1180 gsi = pci_irq++;
1181 gsi_to_irq[irq] = gsi;
1182 } else {
1183 printk(KERN_ERR "GSI %u is too high\n", gsi);
1184 return gsi;
1185 }
1186 }
1187 #endif
1188 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1189 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1190 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1191 return gsi;
1192 }
1193
1194 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1195 u32 gsi, int triggering, int polarity)
1196 {
1197 #ifdef CONFIG_X86_MPPARSE
1198 struct mp_config_intsrc mp_irq;
1199 int ioapic;
1200
1201 if (!acpi_ioapic)
1202 return 0;
1203
1204 /* print the entry should happen on mptable identically */
1205 mp_irq.mp_type = MP_INTSRC;
1206 mp_irq.mp_irqtype = mp_INT;
1207 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1208 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1209 mp_irq.mp_srcbus = number;
1210 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1211 ioapic = mp_find_ioapic(gsi);
1212 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1213 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1214
1215 save_mp_irq(&mp_irq);
1216 #endif
1217 return 0;
1218 }
1219
1220 /*
1221 * Parse IOAPIC related entries in MADT
1222 * returns 0 on success, < 0 on error
1223 */
1224 static int __init acpi_parse_madt_ioapic_entries(void)
1225 {
1226 int count;
1227
1228 /*
1229 * ACPI interpreter is required to complete interrupt setup,
1230 * so if it is off, don't enumerate the io-apics with ACPI.
1231 * If MPS is present, it will handle them,
1232 * otherwise the system will stay in PIC mode
1233 */
1234 if (acpi_disabled || acpi_noirq) {
1235 return -ENODEV;
1236 }
1237
1238 if (!cpu_has_apic)
1239 return -ENODEV;
1240
1241 /*
1242 * if "noapic" boot option, don't look for IO-APICs
1243 */
1244 if (skip_ioapic_setup) {
1245 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1246 "due to 'noapic' option.\n");
1247 return -ENODEV;
1248 }
1249
1250 count =
1251 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1252 MAX_IO_APICS);
1253 if (!count) {
1254 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1255 return -ENODEV;
1256 } else if (count < 0) {
1257 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1258 return count;
1259 }
1260
1261 count =
1262 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1263 NR_IRQ_VECTORS);
1264 if (count < 0) {
1265 printk(KERN_ERR PREFIX
1266 "Error parsing interrupt source overrides entry\n");
1267 /* TBD: Cleanup to allow fallback to MPS */
1268 return count;
1269 }
1270
1271 /*
1272 * If BIOS did not supply an INT_SRC_OVR for the SCI
1273 * pretend we got one so we can set the SCI flags.
1274 */
1275 if (!acpi_sci_override_gsi)
1276 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1277
1278 /* Fill in identity legacy mapings where no override */
1279 mp_config_acpi_legacy_irqs();
1280
1281 count =
1282 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1283 NR_IRQ_VECTORS);
1284 if (count < 0) {
1285 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1286 /* TBD: Cleanup to allow fallback to MPS */
1287 return count;
1288 }
1289
1290 return 0;
1291 }
1292 #else
1293 static inline int acpi_parse_madt_ioapic_entries(void)
1294 {
1295 return -1;
1296 }
1297 #endif /* !CONFIG_X86_IO_APIC */
1298
1299 static void __init early_acpi_process_madt(void)
1300 {
1301 #ifdef CONFIG_X86_LOCAL_APIC
1302 int error;
1303
1304 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1305
1306 /*
1307 * Parse MADT LAPIC entries
1308 */
1309 error = early_acpi_parse_madt_lapic_addr_ovr();
1310 if (!error) {
1311 acpi_lapic = 1;
1312 smp_found_config = 1;
1313 }
1314 if (error == -EINVAL) {
1315 /*
1316 * Dell Precision Workstation 410, 610 come here.
1317 */
1318 printk(KERN_ERR PREFIX
1319 "Invalid BIOS MADT, disabling ACPI\n");
1320 disable_acpi();
1321 }
1322 }
1323 #endif
1324 }
1325
1326 static void __init acpi_process_madt(void)
1327 {
1328 #ifdef CONFIG_X86_LOCAL_APIC
1329 int error;
1330
1331 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1332
1333 /*
1334 * Parse MADT LAPIC entries
1335 */
1336 error = acpi_parse_madt_lapic_entries();
1337 if (!error) {
1338 acpi_lapic = 1;
1339
1340 #ifdef CONFIG_X86_GENERICARCH
1341 generic_bigsmp_probe();
1342 #endif
1343 /*
1344 * Parse MADT IO-APIC entries
1345 */
1346 error = acpi_parse_madt_ioapic_entries();
1347 if (!error) {
1348 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1349 acpi_irq_balance_set(NULL);
1350 acpi_ioapic = 1;
1351
1352 smp_found_config = 1;
1353 setup_apic_routing();
1354 }
1355 }
1356 if (error == -EINVAL) {
1357 /*
1358 * Dell Precision Workstation 410, 610 come here.
1359 */
1360 printk(KERN_ERR PREFIX
1361 "Invalid BIOS MADT, disabling ACPI\n");
1362 disable_acpi();
1363 }
1364 }
1365 #endif
1366 return;
1367 }
1368
1369 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1370 {
1371 if (!acpi_force) {
1372 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1373 d->ident);
1374 acpi_noirq_set();
1375 }
1376 return 0;
1377 }
1378
1379 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1380 {
1381 if (!acpi_force) {
1382 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1383 d->ident);
1384 acpi_disable_pci();
1385 }
1386 return 0;
1387 }
1388
1389 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1390 {
1391 if (!acpi_force) {
1392 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1393 disable_acpi();
1394 } else {
1395 printk(KERN_NOTICE
1396 "Warning: DMI blacklist says broken, but acpi forced\n");
1397 }
1398 return 0;
1399 }
1400
1401 /*
1402 * Limit ACPI to CPU enumeration for HT
1403 */
1404 static int __init force_acpi_ht(const struct dmi_system_id *d)
1405 {
1406 if (!acpi_force) {
1407 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1408 d->ident);
1409 disable_acpi();
1410 acpi_ht = 1;
1411 } else {
1412 printk(KERN_NOTICE
1413 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1414 }
1415 return 0;
1416 }
1417
1418 /*
1419 * Force ignoring BIOS IRQ0 pin2 override
1420 */
1421 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1422 {
1423 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
1424 acpi_skip_timer_override = 1;
1425 return 0;
1426 }
1427
1428 /*
1429 * If your system is blacklisted here, but you find that acpi=force
1430 * works for you, please contact acpi-devel@sourceforge.net
1431 */
1432 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1433 /*
1434 * Boxes that need ACPI disabled
1435 */
1436 {
1437 .callback = dmi_disable_acpi,
1438 .ident = "IBM Thinkpad",
1439 .matches = {
1440 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1441 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1442 },
1443 },
1444
1445 /*
1446 * Boxes that need acpi=ht
1447 */
1448 {
1449 .callback = force_acpi_ht,
1450 .ident = "FSC Primergy T850",
1451 .matches = {
1452 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1453 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1454 },
1455 },
1456 {
1457 .callback = force_acpi_ht,
1458 .ident = "HP VISUALIZE NT Workstation",
1459 .matches = {
1460 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1461 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1462 },
1463 },
1464 {
1465 .callback = force_acpi_ht,
1466 .ident = "Compaq Workstation W8000",
1467 .matches = {
1468 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1469 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1470 },
1471 },
1472 {
1473 .callback = force_acpi_ht,
1474 .ident = "ASUS P4B266",
1475 .matches = {
1476 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1477 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1478 },
1479 },
1480 {
1481 .callback = force_acpi_ht,
1482 .ident = "ASUS P2B-DS",
1483 .matches = {
1484 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1485 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1486 },
1487 },
1488 {
1489 .callback = force_acpi_ht,
1490 .ident = "ASUS CUR-DLS",
1491 .matches = {
1492 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1493 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1494 },
1495 },
1496 {
1497 .callback = force_acpi_ht,
1498 .ident = "ABIT i440BX-W83977",
1499 .matches = {
1500 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1501 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1502 },
1503 },
1504 {
1505 .callback = force_acpi_ht,
1506 .ident = "IBM Bladecenter",
1507 .matches = {
1508 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1509 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1510 },
1511 },
1512 {
1513 .callback = force_acpi_ht,
1514 .ident = "IBM eServer xSeries 360",
1515 .matches = {
1516 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1517 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1518 },
1519 },
1520 {
1521 .callback = force_acpi_ht,
1522 .ident = "IBM eserver xSeries 330",
1523 .matches = {
1524 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1525 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1526 },
1527 },
1528 {
1529 .callback = force_acpi_ht,
1530 .ident = "IBM eserver xSeries 440",
1531 .matches = {
1532 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1533 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1534 },
1535 },
1536
1537 /*
1538 * Boxes that need ACPI PCI IRQ routing disabled
1539 */
1540 {
1541 .callback = disable_acpi_irq,
1542 .ident = "ASUS A7V",
1543 .matches = {
1544 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1545 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1546 /* newer BIOS, Revision 1011, does work */
1547 DMI_MATCH(DMI_BIOS_VERSION,
1548 "ASUS A7V ACPI BIOS Revision 1007"),
1549 },
1550 },
1551 {
1552 /*
1553 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1554 * for LPC bridge, which is needed for the PCI
1555 * interrupt links to work. DSDT fix is in bug 5966.
1556 * 2645, 2646 model numbers are shared with 600/600E/600X
1557 */
1558 .callback = disable_acpi_irq,
1559 .ident = "IBM Thinkpad 600 Series 2645",
1560 .matches = {
1561 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1562 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1563 },
1564 },
1565 {
1566 .callback = disable_acpi_irq,
1567 .ident = "IBM Thinkpad 600 Series 2646",
1568 .matches = {
1569 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1570 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1571 },
1572 },
1573 /*
1574 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1575 */
1576 { /* _BBN 0 bug */
1577 .callback = disable_acpi_pci,
1578 .ident = "ASUS PR-DLS",
1579 .matches = {
1580 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1581 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1582 DMI_MATCH(DMI_BIOS_VERSION,
1583 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1584 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1585 },
1586 },
1587 {
1588 .callback = disable_acpi_pci,
1589 .ident = "Acer TravelMate 36x Laptop",
1590 .matches = {
1591 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1592 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1593 },
1594 },
1595 /*
1596 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1597 * which includes some code which overrides all temperature
1598 * trip points to 16C if the INTIN2 input of the I/O APIC
1599 * is enabled. This input is incorrectly designated the
1600 * ISA IRQ 0 via an interrupt source override even though
1601 * it is wired to the output of the master 8259A and INTIN0
1602 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1603 * override in that cases.
1604 */
1605 {
1606 .callback = dmi_ignore_irq0_timer_override,
1607 .ident = "HP nx6115 laptop",
1608 .matches = {
1609 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1610 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1611 },
1612 },
1613 {
1614 .callback = dmi_ignore_irq0_timer_override,
1615 .ident = "HP NX6125 laptop",
1616 .matches = {
1617 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1618 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1619 },
1620 },
1621 {
1622 .callback = dmi_ignore_irq0_timer_override,
1623 .ident = "HP NX6325 laptop",
1624 .matches = {
1625 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1626 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1627 },
1628 },
1629 {
1630 .callback = dmi_ignore_irq0_timer_override,
1631 .ident = "HP 6715b laptop",
1632 .matches = {
1633 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1634 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1635 },
1636 },
1637 {}
1638 };
1639
1640 /*
1641 * acpi_boot_table_init() and acpi_boot_init()
1642 * called from setup_arch(), always.
1643 * 1. checksums all tables
1644 * 2. enumerates lapics
1645 * 3. enumerates io-apics
1646 *
1647 * acpi_table_init() is separate to allow reading SRAT without
1648 * other side effects.
1649 *
1650 * side effects of acpi_boot_init:
1651 * acpi_lapic = 1 if LAPIC found
1652 * acpi_ioapic = 1 if IOAPIC found
1653 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1654 * if acpi_blacklisted() acpi_disabled = 1;
1655 * acpi_irq_model=...
1656 * ...
1657 *
1658 * return value: (currently ignored)
1659 * 0: success
1660 * !0: failure
1661 */
1662
1663 int __init acpi_boot_table_init(void)
1664 {
1665 int error;
1666
1667 dmi_check_system(acpi_dmi_table);
1668
1669 /*
1670 * If acpi_disabled, bail out
1671 * One exception: acpi=ht continues far enough to enumerate LAPICs
1672 */
1673 if (acpi_disabled && !acpi_ht)
1674 return 1;
1675
1676 /*
1677 * Initialize the ACPI boot-time table parser.
1678 */
1679 error = acpi_table_init();
1680 if (error) {
1681 disable_acpi();
1682 return error;
1683 }
1684
1685 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1686
1687 /*
1688 * blacklist may disable ACPI entirely
1689 */
1690 error = acpi_blacklisted();
1691 if (error) {
1692 if (acpi_force) {
1693 printk(KERN_WARNING PREFIX "acpi=force override\n");
1694 } else {
1695 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1696 disable_acpi();
1697 return error;
1698 }
1699 }
1700
1701 return 0;
1702 }
1703
1704 int __init early_acpi_boot_init(void)
1705 {
1706 /*
1707 * If acpi_disabled, bail out
1708 * One exception: acpi=ht continues far enough to enumerate LAPICs
1709 */
1710 if (acpi_disabled && !acpi_ht)
1711 return 1;
1712
1713 /*
1714 * Process the Multiple APIC Description Table (MADT), if present
1715 */
1716 early_acpi_process_madt();
1717
1718 return 0;
1719 }
1720
1721 int __init acpi_boot_init(void)
1722 {
1723 /*
1724 * If acpi_disabled, bail out
1725 * One exception: acpi=ht continues far enough to enumerate LAPICs
1726 */
1727 if (acpi_disabled && !acpi_ht)
1728 return 1;
1729
1730 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1731
1732 /*
1733 * set sci_int and PM timer address
1734 */
1735 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1736
1737 /*
1738 * Process the Multiple APIC Description Table (MADT), if present
1739 */
1740 acpi_process_madt();
1741
1742 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1743
1744 return 0;
1745 }
1746
1747 static int __init parse_acpi(char *arg)
1748 {
1749 if (!arg)
1750 return -EINVAL;
1751
1752 /* "acpi=off" disables both ACPI table parsing and interpreter */
1753 if (strcmp(arg, "off") == 0) {
1754 disable_acpi();
1755 }
1756 /* acpi=force to over-ride black-list */
1757 else if (strcmp(arg, "force") == 0) {
1758 acpi_force = 1;
1759 acpi_ht = 1;
1760 acpi_disabled = 0;
1761 }
1762 /* acpi=strict disables out-of-spec workarounds */
1763 else if (strcmp(arg, "strict") == 0) {
1764 acpi_strict = 1;
1765 }
1766 /* Limit ACPI just to boot-time to enable HT */
1767 else if (strcmp(arg, "ht") == 0) {
1768 if (!acpi_force)
1769 disable_acpi();
1770 acpi_ht = 1;
1771 }
1772 /* "acpi=noirq" disables ACPI interrupt routing */
1773 else if (strcmp(arg, "noirq") == 0) {
1774 acpi_noirq_set();
1775 } else {
1776 /* Core will printk when we return error. */
1777 return -EINVAL;
1778 }
1779 return 0;
1780 }
1781 early_param("acpi", parse_acpi);
1782
1783 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1784 static int __init parse_pci(char *arg)
1785 {
1786 if (arg && strcmp(arg, "noacpi") == 0)
1787 acpi_disable_pci();
1788 return 0;
1789 }
1790 early_param("pci", parse_pci);
1791
1792 int __init acpi_mps_check(void)
1793 {
1794 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1795 /* mptable code is not built-in*/
1796 if (acpi_disabled || acpi_noirq) {
1797 printk(KERN_WARNING "MPS support code is not built-in.\n"
1798 "Using acpi=off or acpi=noirq or pci=noacpi "
1799 "may have problem\n");
1800 return 1;
1801 }
1802 #endif
1803 return 0;
1804 }
1805
1806 #ifdef CONFIG_X86_IO_APIC
1807 static int __init parse_acpi_skip_timer_override(char *arg)
1808 {
1809 acpi_skip_timer_override = 1;
1810 return 0;
1811 }
1812 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1813
1814 static int __init parse_acpi_use_timer_override(char *arg)
1815 {
1816 acpi_use_timer_override = 1;
1817 return 0;
1818 }
1819 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1820 #endif /* CONFIG_X86_IO_APIC */
1821
1822 static int __init setup_acpi_sci(char *s)
1823 {
1824 if (!s)
1825 return -EINVAL;
1826 if (!strcmp(s, "edge"))
1827 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1828 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1829 else if (!strcmp(s, "level"))
1830 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1831 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1832 else if (!strcmp(s, "high"))
1833 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1834 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1835 else if (!strcmp(s, "low"))
1836 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1837 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1838 else
1839 return -EINVAL;
1840 return 0;
1841 }
1842 early_param("acpi_sci", setup_acpi_sci);
1843
1844 int __acpi_acquire_global_lock(unsigned int *lock)
1845 {
1846 unsigned int old, new, val;
1847 do {
1848 old = *lock;
1849 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1850 val = cmpxchg(lock, old, new);
1851 } while (unlikely (val != old));
1852 return (new < 3) ? -1 : 0;
1853 }
1854
1855 int __acpi_release_global_lock(unsigned int *lock)
1856 {
1857 unsigned int old, new, val;
1858 do {
1859 old = *lock;
1860 new = old & ~0x3;
1861 val = cmpxchg(lock, old, new);
1862 } while (unlikely (val != old));
1863 return old & 0x1;
1864 }
Linux kernel - Deliverables
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