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Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86
[deliverable/linux.git] / arch / x86 / kernel / acpi / boot.c
1 /*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/bootmem.h>
35 #include <linux/ioport.h>
36
37 #include <asm/pgtable.h>
38 #include <asm/io_apic.h>
39 #include <asm/apic.h>
40 #include <asm/io.h>
41 #include <asm/mpspec.h>
42
43 static int __initdata acpi_force = 0;
44
45 #ifdef CONFIG_ACPI
46 int acpi_disabled = 0;
47 #else
48 int acpi_disabled = 1;
49 #endif
50 EXPORT_SYMBOL(acpi_disabled);
51
52 #ifdef CONFIG_X86_64
53
54 #include <asm/proto.h>
55
56 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
57
58
59 #else /* X86 */
60
61 #ifdef CONFIG_X86_LOCAL_APIC
62 #include <mach_apic.h>
63 #include <mach_mpparse.h>
64 #endif /* CONFIG_X86_LOCAL_APIC */
65
66 #endif /* X86 */
67
68 #define BAD_MADT_ENTRY(entry, end) ( \
69 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
70 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
71
72 #define PREFIX "ACPI: "
73
74 int acpi_noirq; /* skip ACPI IRQ initialization */
75 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
76 int acpi_ht __initdata = 1; /* enable HT */
77
78 int acpi_lapic;
79 int acpi_ioapic;
80 int acpi_strict;
81 EXPORT_SYMBOL(acpi_strict);
82
83 u8 acpi_sci_flags __initdata;
84 int acpi_sci_override_gsi __initdata;
85 int acpi_skip_timer_override __initdata;
86 int acpi_use_timer_override __initdata;
87
88 #ifdef CONFIG_X86_LOCAL_APIC
89 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
90 #endif
91
92 #ifndef __HAVE_ARCH_CMPXCHG
93 #warning ACPI uses CMPXCHG, i486 and later hardware
94 #endif
95
96 /* --------------------------------------------------------------------------
97 Boot-time Configuration
98 -------------------------------------------------------------------------- */
99
100 /*
101 * The default interrupt routing model is PIC (8259). This gets
102 * overridden if IOAPICs are enumerated (below).
103 */
104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
105
106 #ifdef CONFIG_X86_64
107
108 /* rely on all ACPI tables being in the direct mapping */
109 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
110 {
111 if (!phys_addr || !size)
112 return NULL;
113
114 if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
115 return __va(phys_addr);
116
117 return NULL;
118 }
119
120 #else
121
122 /*
123 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
124 * to map the target physical address. The problem is that set_fixmap()
125 * provides a single page, and it is possible that the page is not
126 * sufficient.
127 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
128 * i.e. until the next __va_range() call.
129 *
130 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
131 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
132 * count idx down while incrementing the phys address.
133 */
134 char *__acpi_map_table(unsigned long phys, unsigned long size)
135 {
136 unsigned long base, offset, mapped_size;
137 int idx;
138
139 if (phys + size < 8 * 1024 * 1024)
140 return __va(phys);
141
142 offset = phys & (PAGE_SIZE - 1);
143 mapped_size = PAGE_SIZE - offset;
144 set_fixmap(FIX_ACPI_END, phys);
145 base = fix_to_virt(FIX_ACPI_END);
146
147 /*
148 * Most cases can be covered by the below.
149 */
150 idx = FIX_ACPI_END;
151 while (mapped_size < size) {
152 if (--idx < FIX_ACPI_BEGIN)
153 return NULL; /* cannot handle this */
154 phys += PAGE_SIZE;
155 set_fixmap(idx, phys);
156 mapped_size += PAGE_SIZE;
157 }
158
159 return ((unsigned char *)base + offset);
160 }
161 #endif
162
163 #ifdef CONFIG_PCI_MMCONFIG
164 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
165 struct acpi_mcfg_allocation *pci_mmcfg_config;
166 int pci_mmcfg_config_num;
167
168 int __init acpi_parse_mcfg(struct acpi_table_header *header)
169 {
170 struct acpi_table_mcfg *mcfg;
171 unsigned long i;
172 int config_size;
173
174 if (!header)
175 return -EINVAL;
176
177 mcfg = (struct acpi_table_mcfg *)header;
178
179 /* how many config structures do we have */
180 pci_mmcfg_config_num = 0;
181 i = header->length - sizeof(struct acpi_table_mcfg);
182 while (i >= sizeof(struct acpi_mcfg_allocation)) {
183 ++pci_mmcfg_config_num;
184 i -= sizeof(struct acpi_mcfg_allocation);
185 };
186 if (pci_mmcfg_config_num == 0) {
187 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
188 return -ENODEV;
189 }
190
191 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
192 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
193 if (!pci_mmcfg_config) {
194 printk(KERN_WARNING PREFIX
195 "No memory for MCFG config tables\n");
196 return -ENOMEM;
197 }
198
199 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
200 for (i = 0; i < pci_mmcfg_config_num; ++i) {
201 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) {
202 printk(KERN_ERR PREFIX
203 "MMCONFIG not in low 4GB of memory\n");
204 kfree(pci_mmcfg_config);
205 pci_mmcfg_config_num = 0;
206 return -ENODEV;
207 }
208 }
209
210 return 0;
211 }
212 #endif /* CONFIG_PCI_MMCONFIG */
213
214 #ifdef CONFIG_X86_LOCAL_APIC
215 static int __init acpi_parse_madt(struct acpi_table_header *table)
216 {
217 struct acpi_table_madt *madt = NULL;
218
219 if (!cpu_has_apic)
220 return -EINVAL;
221
222 madt = (struct acpi_table_madt *)table;
223 if (!madt) {
224 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
225 return -ENODEV;
226 }
227
228 if (madt->address) {
229 acpi_lapic_addr = (u64) madt->address;
230
231 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
232 madt->address);
233 }
234
235 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
236
237 return 0;
238 }
239
240 static int __init
241 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
242 {
243 struct acpi_madt_local_apic *processor = NULL;
244
245 processor = (struct acpi_madt_local_apic *)header;
246
247 if (BAD_MADT_ENTRY(processor, end))
248 return -EINVAL;
249
250 acpi_table_print_madt_entry(header);
251
252 /*
253 * We need to register disabled CPU as well to permit
254 * counting disabled CPUs. This allows us to size
255 * cpus_possible_map more accurately, to permit
256 * to not preallocating memory for all NR_CPUS
257 * when we use CPU hotplug.
258 */
259 mp_register_lapic(processor->id, /* APIC ID */
260 processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */
261
262 return 0;
263 }
264
265 static int __init
266 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
267 const unsigned long end)
268 {
269 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
270
271 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
272
273 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
274 return -EINVAL;
275
276 acpi_lapic_addr = lapic_addr_ovr->address;
277
278 return 0;
279 }
280
281 static int __init
282 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
283 {
284 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
285
286 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
287
288 if (BAD_MADT_ENTRY(lapic_nmi, end))
289 return -EINVAL;
290
291 acpi_table_print_madt_entry(header);
292
293 if (lapic_nmi->lint != 1)
294 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
295
296 return 0;
297 }
298
299 #endif /*CONFIG_X86_LOCAL_APIC */
300
301 #ifdef CONFIG_X86_IO_APIC
302
303 static int __init
304 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
305 {
306 struct acpi_madt_io_apic *ioapic = NULL;
307
308 ioapic = (struct acpi_madt_io_apic *)header;
309
310 if (BAD_MADT_ENTRY(ioapic, end))
311 return -EINVAL;
312
313 acpi_table_print_madt_entry(header);
314
315 mp_register_ioapic(ioapic->id,
316 ioapic->address, ioapic->global_irq_base);
317
318 return 0;
319 }
320
321 /*
322 * Parse Interrupt Source Override for the ACPI SCI
323 */
324 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
325 {
326 if (trigger == 0) /* compatible SCI trigger is level */
327 trigger = 3;
328
329 if (polarity == 0) /* compatible SCI polarity is low */
330 polarity = 3;
331
332 /* Command-line over-ride via acpi_sci= */
333 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
334 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
335
336 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
337 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
338
339 /*
340 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
341 * If GSI is < 16, this will update its flags,
342 * else it will create a new mp_irqs[] entry.
343 */
344 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
345
346 /*
347 * stash over-ride to indicate we've been here
348 * and for later update of acpi_gbl_FADT
349 */
350 acpi_sci_override_gsi = gsi;
351 return;
352 }
353
354 static int __init
355 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
356 const unsigned long end)
357 {
358 struct acpi_madt_interrupt_override *intsrc = NULL;
359
360 intsrc = (struct acpi_madt_interrupt_override *)header;
361
362 if (BAD_MADT_ENTRY(intsrc, end))
363 return -EINVAL;
364
365 acpi_table_print_madt_entry(header);
366
367 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
368 acpi_sci_ioapic_setup(intsrc->global_irq,
369 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
370 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
371 return 0;
372 }
373
374 if (acpi_skip_timer_override &&
375 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
376 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
377 return 0;
378 }
379
380 mp_override_legacy_irq(intsrc->source_irq,
381 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
382 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
383 intsrc->global_irq);
384
385 return 0;
386 }
387
388 static int __init
389 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
390 {
391 struct acpi_madt_nmi_source *nmi_src = NULL;
392
393 nmi_src = (struct acpi_madt_nmi_source *)header;
394
395 if (BAD_MADT_ENTRY(nmi_src, end))
396 return -EINVAL;
397
398 acpi_table_print_madt_entry(header);
399
400 /* TBD: Support nimsrc entries? */
401
402 return 0;
403 }
404
405 #endif /* CONFIG_X86_IO_APIC */
406
407 /*
408 * acpi_pic_sci_set_trigger()
409 *
410 * use ELCR to set PIC-mode trigger type for SCI
411 *
412 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
413 * it may require Edge Trigger -- use "acpi_sci=edge"
414 *
415 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
416 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
417 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
418 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
419 */
420
421 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
422 {
423 unsigned int mask = 1 << irq;
424 unsigned int old, new;
425
426 /* Real old ELCR mask */
427 old = inb(0x4d0) | (inb(0x4d1) << 8);
428
429 /*
430 * If we use ACPI to set PCI IRQs, then we should clear ELCR
431 * since we will set it correctly as we enable the PCI irq
432 * routing.
433 */
434 new = acpi_noirq ? old : 0;
435
436 /*
437 * Update SCI information in the ELCR, it isn't in the PCI
438 * routing tables..
439 */
440 switch (trigger) {
441 case 1: /* Edge - clear */
442 new &= ~mask;
443 break;
444 case 3: /* Level - set */
445 new |= mask;
446 break;
447 }
448
449 if (old == new)
450 return;
451
452 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
453 outb(new, 0x4d0);
454 outb(new >> 8, 0x4d1);
455 }
456
457 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
458 {
459 *irq = gsi;
460 return 0;
461 }
462
463 /*
464 * success: return IRQ number (>=0)
465 * failure: return < 0
466 */
467 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
468 {
469 unsigned int irq;
470 unsigned int plat_gsi = gsi;
471
472 #ifdef CONFIG_PCI
473 /*
474 * Make sure all (legacy) PCI IRQs are set as level-triggered.
475 */
476 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
477 extern void eisa_set_level_irq(unsigned int irq);
478
479 if (triggering == ACPI_LEVEL_SENSITIVE)
480 eisa_set_level_irq(gsi);
481 }
482 #endif
483
484 #ifdef CONFIG_X86_IO_APIC
485 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
486 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
487 }
488 #endif
489 acpi_gsi_to_irq(plat_gsi, &irq);
490 return irq;
491 }
492
493 EXPORT_SYMBOL(acpi_register_gsi);
494
495 /*
496 * ACPI based hotplug support for CPU
497 */
498 #ifdef CONFIG_ACPI_HOTPLUG_CPU
499
500 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
501 {
502 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
503 union acpi_object *obj;
504 struct acpi_madt_local_apic *lapic;
505 cpumask_t tmp_map, new_map;
506 u8 physid;
507 int cpu;
508
509 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
510 return -EINVAL;
511
512 if (!buffer.length || !buffer.pointer)
513 return -EINVAL;
514
515 obj = buffer.pointer;
516 if (obj->type != ACPI_TYPE_BUFFER ||
517 obj->buffer.length < sizeof(*lapic)) {
518 kfree(buffer.pointer);
519 return -EINVAL;
520 }
521
522 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
523
524 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
525 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
526 kfree(buffer.pointer);
527 return -EINVAL;
528 }
529
530 physid = lapic->id;
531
532 kfree(buffer.pointer);
533 buffer.length = ACPI_ALLOCATE_BUFFER;
534 buffer.pointer = NULL;
535
536 tmp_map = cpu_present_map;
537 mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
538
539 /*
540 * If mp_register_lapic successfully generates a new logical cpu
541 * number, then the following will get us exactly what was mapped
542 */
543 cpus_andnot(new_map, cpu_present_map, tmp_map);
544 if (cpus_empty(new_map)) {
545 printk ("Unable to map lapic to logical cpu number\n");
546 return -EINVAL;
547 }
548
549 cpu = first_cpu(new_map);
550
551 *pcpu = cpu;
552 return 0;
553 }
554
555 /* wrapper to silence section mismatch warning */
556 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
557 {
558 return _acpi_map_lsapic(handle, pcpu);
559 }
560 EXPORT_SYMBOL(acpi_map_lsapic);
561
562 int acpi_unmap_lsapic(int cpu)
563 {
564 per_cpu(x86_cpu_to_apicid, cpu) = -1;
565 cpu_clear(cpu, cpu_present_map);
566 num_processors--;
567
568 return (0);
569 }
570
571 EXPORT_SYMBOL(acpi_unmap_lsapic);
572 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
573
574 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
575 {
576 /* TBD */
577 return -EINVAL;
578 }
579
580 EXPORT_SYMBOL(acpi_register_ioapic);
581
582 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
583 {
584 /* TBD */
585 return -EINVAL;
586 }
587
588 EXPORT_SYMBOL(acpi_unregister_ioapic);
589
590 static unsigned long __init
591 acpi_scan_rsdp(unsigned long start, unsigned long length)
592 {
593 unsigned long offset = 0;
594 unsigned long sig_len = sizeof("RSD PTR ") - 1;
595
596 /*
597 * Scan all 16-byte boundaries of the physical memory region for the
598 * RSDP signature.
599 */
600 for (offset = 0; offset < length; offset += 16) {
601 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
602 continue;
603 return (start + offset);
604 }
605
606 return 0;
607 }
608
609 static int __init acpi_parse_sbf(struct acpi_table_header *table)
610 {
611 struct acpi_table_boot *sb;
612
613 sb = (struct acpi_table_boot *)table;
614 if (!sb) {
615 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
616 return -ENODEV;
617 }
618
619 sbf_port = sb->cmos_index; /* Save CMOS port */
620
621 return 0;
622 }
623
624 #ifdef CONFIG_HPET_TIMER
625 #include <asm/hpet.h>
626
627 static struct __initdata resource *hpet_res;
628
629 static int __init acpi_parse_hpet(struct acpi_table_header *table)
630 {
631 struct acpi_table_hpet *hpet_tbl;
632
633 hpet_tbl = (struct acpi_table_hpet *)table;
634 if (!hpet_tbl) {
635 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
636 return -ENODEV;
637 }
638
639 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
640 printk(KERN_WARNING PREFIX "HPET timers must be located in "
641 "memory.\n");
642 return -1;
643 }
644
645 hpet_address = hpet_tbl->address.address;
646
647 /*
648 * Some broken BIOSes advertise HPET at 0x0. We really do not
649 * want to allocate a resource there.
650 */
651 if (!hpet_address) {
652 printk(KERN_WARNING PREFIX
653 "HPET id: %#x base: %#lx is invalid\n",
654 hpet_tbl->id, hpet_address);
655 return 0;
656 }
657 #ifdef CONFIG_X86_64
658 /*
659 * Some even more broken BIOSes advertise HPET at
660 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
661 * some noise:
662 */
663 if (hpet_address == 0xfed0000000000000UL) {
664 if (!hpet_force_user) {
665 printk(KERN_WARNING PREFIX "HPET id: %#x "
666 "base: 0xfed0000000000000 is bogus\n "
667 "try hpet=force on the kernel command line to "
668 "fix it up to 0xfed00000.\n", hpet_tbl->id);
669 hpet_address = 0;
670 return 0;
671 }
672 printk(KERN_WARNING PREFIX
673 "HPET id: %#x base: 0xfed0000000000000 fixed up "
674 "to 0xfed00000.\n", hpet_tbl->id);
675 hpet_address >>= 32;
676 }
677 #endif
678 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
679 hpet_tbl->id, hpet_address);
680
681 /*
682 * Allocate and initialize the HPET firmware resource for adding into
683 * the resource tree during the lateinit timeframe.
684 */
685 #define HPET_RESOURCE_NAME_SIZE 9
686 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
687
688 if (!hpet_res)
689 return 0;
690
691 memset(hpet_res, 0, sizeof(*hpet_res));
692 hpet_res->name = (void *)&hpet_res[1];
693 hpet_res->flags = IORESOURCE_MEM;
694 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
695 hpet_tbl->sequence);
696
697 hpet_res->start = hpet_address;
698 hpet_res->end = hpet_address + (1 * 1024) - 1;
699
700 return 0;
701 }
702
703 /*
704 * hpet_insert_resource inserts the HPET resources used into the resource
705 * tree.
706 */
707 static __init int hpet_insert_resource(void)
708 {
709 if (!hpet_res)
710 return 1;
711
712 return insert_resource(&iomem_resource, hpet_res);
713 }
714
715 late_initcall(hpet_insert_resource);
716
717 #else
718 #define acpi_parse_hpet NULL
719 #endif
720
721 static int __init acpi_parse_fadt(struct acpi_table_header *table)
722 {
723
724 #ifdef CONFIG_X86_PM_TIMER
725 /* detect the location of the ACPI PM Timer */
726 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
727 /* FADT rev. 2 */
728 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
729 ACPI_ADR_SPACE_SYSTEM_IO)
730 return 0;
731
732 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
733 /*
734 * "X" fields are optional extensions to the original V1.0
735 * fields, so we must selectively expand V1.0 fields if the
736 * corresponding X field is zero.
737 */
738 if (!pmtmr_ioport)
739 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
740 } else {
741 /* FADT rev. 1 */
742 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
743 }
744 if (pmtmr_ioport)
745 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
746 pmtmr_ioport);
747 #endif
748 return 0;
749 }
750
751 unsigned long __init acpi_find_rsdp(void)
752 {
753 unsigned long rsdp_phys = 0;
754
755 if (efi_enabled) {
756 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
757 return efi.acpi20;
758 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
759 return efi.acpi;
760 }
761 /*
762 * Scan memory looking for the RSDP signature. First search EBDA (low
763 * memory) paragraphs and then search upper memory (E0000-FFFFF).
764 */
765 rsdp_phys = acpi_scan_rsdp(0, 0x400);
766 if (!rsdp_phys)
767 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
768
769 return rsdp_phys;
770 }
771
772 #ifdef CONFIG_X86_LOCAL_APIC
773 /*
774 * Parse LAPIC entries in MADT
775 * returns 0 on success, < 0 on error
776 */
777 static int __init acpi_parse_madt_lapic_entries(void)
778 {
779 int count;
780
781 if (!cpu_has_apic)
782 return -ENODEV;
783
784 /*
785 * Note that the LAPIC address is obtained from the MADT (32-bit value)
786 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
787 */
788
789 count =
790 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
791 acpi_parse_lapic_addr_ovr, 0);
792 if (count < 0) {
793 printk(KERN_ERR PREFIX
794 "Error parsing LAPIC address override entry\n");
795 return count;
796 }
797
798 mp_register_lapic_address(acpi_lapic_addr);
799
800 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
801 MAX_APICS);
802 if (!count) {
803 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
804 /* TBD: Cleanup to allow fallback to MPS */
805 return -ENODEV;
806 } else if (count < 0) {
807 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
808 /* TBD: Cleanup to allow fallback to MPS */
809 return count;
810 }
811
812 count =
813 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
814 if (count < 0) {
815 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
816 /* TBD: Cleanup to allow fallback to MPS */
817 return count;
818 }
819 return 0;
820 }
821 #endif /* CONFIG_X86_LOCAL_APIC */
822
823 #ifdef CONFIG_X86_IO_APIC
824 /*
825 * Parse IOAPIC related entries in MADT
826 * returns 0 on success, < 0 on error
827 */
828 static int __init acpi_parse_madt_ioapic_entries(void)
829 {
830 int count;
831
832 /*
833 * ACPI interpreter is required to complete interrupt setup,
834 * so if it is off, don't enumerate the io-apics with ACPI.
835 * If MPS is present, it will handle them,
836 * otherwise the system will stay in PIC mode
837 */
838 if (acpi_disabled || acpi_noirq) {
839 return -ENODEV;
840 }
841
842 if (!cpu_has_apic)
843 return -ENODEV;
844
845 /*
846 * if "noapic" boot option, don't look for IO-APICs
847 */
848 if (skip_ioapic_setup) {
849 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
850 "due to 'noapic' option.\n");
851 return -ENODEV;
852 }
853
854 count =
855 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
856 MAX_IO_APICS);
857 if (!count) {
858 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
859 return -ENODEV;
860 } else if (count < 0) {
861 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
862 return count;
863 }
864
865 count =
866 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
867 NR_IRQ_VECTORS);
868 if (count < 0) {
869 printk(KERN_ERR PREFIX
870 "Error parsing interrupt source overrides entry\n");
871 /* TBD: Cleanup to allow fallback to MPS */
872 return count;
873 }
874
875 /*
876 * If BIOS did not supply an INT_SRC_OVR for the SCI
877 * pretend we got one so we can set the SCI flags.
878 */
879 if (!acpi_sci_override_gsi)
880 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
881
882 /* Fill in identity legacy mapings where no override */
883 mp_config_acpi_legacy_irqs();
884
885 count =
886 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
887 NR_IRQ_VECTORS);
888 if (count < 0) {
889 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
890 /* TBD: Cleanup to allow fallback to MPS */
891 return count;
892 }
893
894 return 0;
895 }
896 #else
897 static inline int acpi_parse_madt_ioapic_entries(void)
898 {
899 return -1;
900 }
901 #endif /* !CONFIG_X86_IO_APIC */
902
903 static void __init acpi_process_madt(void)
904 {
905 #ifdef CONFIG_X86_LOCAL_APIC
906 int error;
907
908 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
909
910 /*
911 * Parse MADT LAPIC entries
912 */
913 error = acpi_parse_madt_lapic_entries();
914 if (!error) {
915 acpi_lapic = 1;
916
917 #ifdef CONFIG_X86_GENERICARCH
918 generic_bigsmp_probe();
919 #endif
920 /*
921 * Parse MADT IO-APIC entries
922 */
923 error = acpi_parse_madt_ioapic_entries();
924 if (!error) {
925 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
926 acpi_irq_balance_set(NULL);
927 acpi_ioapic = 1;
928
929 smp_found_config = 1;
930 setup_apic_routing();
931 }
932 }
933 if (error == -EINVAL) {
934 /*
935 * Dell Precision Workstation 410, 610 come here.
936 */
937 printk(KERN_ERR PREFIX
938 "Invalid BIOS MADT, disabling ACPI\n");
939 disable_acpi();
940 }
941 }
942 #endif
943 return;
944 }
945
946 #ifdef __i386__
947
948 static int __init disable_acpi_irq(const struct dmi_system_id *d)
949 {
950 if (!acpi_force) {
951 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
952 d->ident);
953 acpi_noirq_set();
954 }
955 return 0;
956 }
957
958 static int __init disable_acpi_pci(const struct dmi_system_id *d)
959 {
960 if (!acpi_force) {
961 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
962 d->ident);
963 acpi_disable_pci();
964 }
965 return 0;
966 }
967
968 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
969 {
970 if (!acpi_force) {
971 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
972 disable_acpi();
973 } else {
974 printk(KERN_NOTICE
975 "Warning: DMI blacklist says broken, but acpi forced\n");
976 }
977 return 0;
978 }
979
980 /*
981 * Limit ACPI to CPU enumeration for HT
982 */
983 static int __init force_acpi_ht(const struct dmi_system_id *d)
984 {
985 if (!acpi_force) {
986 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
987 d->ident);
988 disable_acpi();
989 acpi_ht = 1;
990 } else {
991 printk(KERN_NOTICE
992 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
993 }
994 return 0;
995 }
996
997 /*
998 * If your system is blacklisted here, but you find that acpi=force
999 * works for you, please contact acpi-devel@sourceforge.net
1000 */
1001 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1002 /*
1003 * Boxes that need ACPI disabled
1004 */
1005 {
1006 .callback = dmi_disable_acpi,
1007 .ident = "IBM Thinkpad",
1008 .matches = {
1009 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1010 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1011 },
1012 },
1013
1014 /*
1015 * Boxes that need acpi=ht
1016 */
1017 {
1018 .callback = force_acpi_ht,
1019 .ident = "FSC Primergy T850",
1020 .matches = {
1021 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1022 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1023 },
1024 },
1025 {
1026 .callback = force_acpi_ht,
1027 .ident = "HP VISUALIZE NT Workstation",
1028 .matches = {
1029 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1030 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1031 },
1032 },
1033 {
1034 .callback = force_acpi_ht,
1035 .ident = "Compaq Workstation W8000",
1036 .matches = {
1037 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1038 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1039 },
1040 },
1041 {
1042 .callback = force_acpi_ht,
1043 .ident = "ASUS P4B266",
1044 .matches = {
1045 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1046 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1047 },
1048 },
1049 {
1050 .callback = force_acpi_ht,
1051 .ident = "ASUS P2B-DS",
1052 .matches = {
1053 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1054 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1055 },
1056 },
1057 {
1058 .callback = force_acpi_ht,
1059 .ident = "ASUS CUR-DLS",
1060 .matches = {
1061 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1062 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1063 },
1064 },
1065 {
1066 .callback = force_acpi_ht,
1067 .ident = "ABIT i440BX-W83977",
1068 .matches = {
1069 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1070 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1071 },
1072 },
1073 {
1074 .callback = force_acpi_ht,
1075 .ident = "IBM Bladecenter",
1076 .matches = {
1077 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1078 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1079 },
1080 },
1081 {
1082 .callback = force_acpi_ht,
1083 .ident = "IBM eServer xSeries 360",
1084 .matches = {
1085 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1086 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1087 },
1088 },
1089 {
1090 .callback = force_acpi_ht,
1091 .ident = "IBM eserver xSeries 330",
1092 .matches = {
1093 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1094 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1095 },
1096 },
1097 {
1098 .callback = force_acpi_ht,
1099 .ident = "IBM eserver xSeries 440",
1100 .matches = {
1101 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1102 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1103 },
1104 },
1105
1106 /*
1107 * Boxes that need ACPI PCI IRQ routing disabled
1108 */
1109 {
1110 .callback = disable_acpi_irq,
1111 .ident = "ASUS A7V",
1112 .matches = {
1113 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1114 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1115 /* newer BIOS, Revision 1011, does work */
1116 DMI_MATCH(DMI_BIOS_VERSION,
1117 "ASUS A7V ACPI BIOS Revision 1007"),
1118 },
1119 },
1120 {
1121 /*
1122 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1123 * for LPC bridge, which is needed for the PCI
1124 * interrupt links to work. DSDT fix is in bug 5966.
1125 * 2645, 2646 model numbers are shared with 600/600E/600X
1126 */
1127 .callback = disable_acpi_irq,
1128 .ident = "IBM Thinkpad 600 Series 2645",
1129 .matches = {
1130 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1131 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1132 },
1133 },
1134 {
1135 .callback = disable_acpi_irq,
1136 .ident = "IBM Thinkpad 600 Series 2646",
1137 .matches = {
1138 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1139 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1140 },
1141 },
1142 /*
1143 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1144 */
1145 { /* _BBN 0 bug */
1146 .callback = disable_acpi_pci,
1147 .ident = "ASUS PR-DLS",
1148 .matches = {
1149 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1150 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1151 DMI_MATCH(DMI_BIOS_VERSION,
1152 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1153 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1154 },
1155 },
1156 {
1157 .callback = disable_acpi_pci,
1158 .ident = "Acer TravelMate 36x Laptop",
1159 .matches = {
1160 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1161 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1162 },
1163 },
1164 {}
1165 };
1166
1167 #endif /* __i386__ */
1168
1169 /*
1170 * acpi_boot_table_init() and acpi_boot_init()
1171 * called from setup_arch(), always.
1172 * 1. checksums all tables
1173 * 2. enumerates lapics
1174 * 3. enumerates io-apics
1175 *
1176 * acpi_table_init() is separate to allow reading SRAT without
1177 * other side effects.
1178 *
1179 * side effects of acpi_boot_init:
1180 * acpi_lapic = 1 if LAPIC found
1181 * acpi_ioapic = 1 if IOAPIC found
1182 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1183 * if acpi_blacklisted() acpi_disabled = 1;
1184 * acpi_irq_model=...
1185 * ...
1186 *
1187 * return value: (currently ignored)
1188 * 0: success
1189 * !0: failure
1190 */
1191
1192 int __init acpi_boot_table_init(void)
1193 {
1194 int error;
1195
1196 #ifdef __i386__
1197 dmi_check_system(acpi_dmi_table);
1198 #endif
1199
1200 /*
1201 * If acpi_disabled, bail out
1202 * One exception: acpi=ht continues far enough to enumerate LAPICs
1203 */
1204 if (acpi_disabled && !acpi_ht)
1205 return 1;
1206
1207 /*
1208 * Initialize the ACPI boot-time table parser.
1209 */
1210 error = acpi_table_init();
1211 if (error) {
1212 disable_acpi();
1213 return error;
1214 }
1215
1216 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1217
1218 /*
1219 * blacklist may disable ACPI entirely
1220 */
1221 error = acpi_blacklisted();
1222 if (error) {
1223 if (acpi_force) {
1224 printk(KERN_WARNING PREFIX "acpi=force override\n");
1225 } else {
1226 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1227 disable_acpi();
1228 return error;
1229 }
1230 }
1231
1232 return 0;
1233 }
1234
1235 int __init acpi_boot_init(void)
1236 {
1237 /*
1238 * If acpi_disabled, bail out
1239 * One exception: acpi=ht continues far enough to enumerate LAPICs
1240 */
1241 if (acpi_disabled && !acpi_ht)
1242 return 1;
1243
1244 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1245
1246 /*
1247 * set sci_int and PM timer address
1248 */
1249 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1250
1251 /*
1252 * Process the Multiple APIC Description Table (MADT), if present
1253 */
1254 acpi_process_madt();
1255
1256 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1257
1258 return 0;
1259 }
1260
1261 static int __init parse_acpi(char *arg)
1262 {
1263 if (!arg)
1264 return -EINVAL;
1265
1266 /* "acpi=off" disables both ACPI table parsing and interpreter */
1267 if (strcmp(arg, "off") == 0) {
1268 disable_acpi();
1269 }
1270 /* acpi=force to over-ride black-list */
1271 else if (strcmp(arg, "force") == 0) {
1272 acpi_force = 1;
1273 acpi_ht = 1;
1274 acpi_disabled = 0;
1275 }
1276 /* acpi=strict disables out-of-spec workarounds */
1277 else if (strcmp(arg, "strict") == 0) {
1278 acpi_strict = 1;
1279 }
1280 /* Limit ACPI just to boot-time to enable HT */
1281 else if (strcmp(arg, "ht") == 0) {
1282 if (!acpi_force)
1283 disable_acpi();
1284 acpi_ht = 1;
1285 }
1286 /* "acpi=noirq" disables ACPI interrupt routing */
1287 else if (strcmp(arg, "noirq") == 0) {
1288 acpi_noirq_set();
1289 } else {
1290 /* Core will printk when we return error. */
1291 return -EINVAL;
1292 }
1293 return 0;
1294 }
1295 early_param("acpi", parse_acpi);
1296
1297 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1298 static int __init parse_pci(char *arg)
1299 {
1300 if (arg && strcmp(arg, "noacpi") == 0)
1301 acpi_disable_pci();
1302 return 0;
1303 }
1304 early_param("pci", parse_pci);
1305
1306 #ifdef CONFIG_X86_IO_APIC
1307 static int __init parse_acpi_skip_timer_override(char *arg)
1308 {
1309 acpi_skip_timer_override = 1;
1310 return 0;
1311 }
1312 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1313
1314 static int __init parse_acpi_use_timer_override(char *arg)
1315 {
1316 acpi_use_timer_override = 1;
1317 return 0;
1318 }
1319 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1320 #endif /* CONFIG_X86_IO_APIC */
1321
1322 static int __init setup_acpi_sci(char *s)
1323 {
1324 if (!s)
1325 return -EINVAL;
1326 if (!strcmp(s, "edge"))
1327 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1328 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1329 else if (!strcmp(s, "level"))
1330 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1331 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1332 else if (!strcmp(s, "high"))
1333 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1334 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1335 else if (!strcmp(s, "low"))
1336 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1337 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1338 else
1339 return -EINVAL;
1340 return 0;
1341 }
1342 early_param("acpi_sci", setup_acpi_sci);
1343
1344 int __acpi_acquire_global_lock(unsigned int *lock)
1345 {
1346 unsigned int old, new, val;
1347 do {
1348 old = *lock;
1349 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1350 val = cmpxchg(lock, old, new);
1351 } while (unlikely (val != old));
1352 return (new < 3) ? -1 : 0;
1353 }
1354
1355 int __acpi_release_global_lock(unsigned int *lock)
1356 {
1357 unsigned int old, new, val;
1358 do {
1359 old = *lock;
1360 new = old & ~0x3;
1361 val = cmpxchg(lock, old, new);
1362 } while (unlikely (val != old));
1363 return old & 0x1;
1364 }
Linux kernel - Deliverables
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