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Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6
[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 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
500 {
501 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
502 union acpi_object *obj;
503 struct acpi_madt_local_apic *lapic;
504 cpumask_t tmp_map, new_map;
505 u8 physid;
506 int cpu;
507
508 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
509 return -EINVAL;
510
511 if (!buffer.length || !buffer.pointer)
512 return -EINVAL;
513
514 obj = buffer.pointer;
515 if (obj->type != ACPI_TYPE_BUFFER ||
516 obj->buffer.length < sizeof(*lapic)) {
517 kfree(buffer.pointer);
518 return -EINVAL;
519 }
520
521 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
522
523 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
524 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
525 kfree(buffer.pointer);
526 return -EINVAL;
527 }
528
529 physid = lapic->id;
530
531 kfree(buffer.pointer);
532 buffer.length = ACPI_ALLOCATE_BUFFER;
533 buffer.pointer = NULL;
534
535 tmp_map = cpu_present_map;
536 mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
537
538 /*
539 * If mp_register_lapic successfully generates a new logical cpu
540 * number, then the following will get us exactly what was mapped
541 */
542 cpus_andnot(new_map, cpu_present_map, tmp_map);
543 if (cpus_empty(new_map)) {
544 printk ("Unable to map lapic to logical cpu number\n");
545 return -EINVAL;
546 }
547
548 cpu = first_cpu(new_map);
549
550 *pcpu = cpu;
551 return 0;
552 }
553
554 EXPORT_SYMBOL(acpi_map_lsapic);
555
556 int acpi_unmap_lsapic(int cpu)
557 {
558 per_cpu(x86_cpu_to_apicid, cpu) = -1;
559 cpu_clear(cpu, cpu_present_map);
560 num_processors--;
561
562 return (0);
563 }
564
565 EXPORT_SYMBOL(acpi_unmap_lsapic);
566 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
567
568 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
569 {
570 /* TBD */
571 return -EINVAL;
572 }
573
574 EXPORT_SYMBOL(acpi_register_ioapic);
575
576 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
577 {
578 /* TBD */
579 return -EINVAL;
580 }
581
582 EXPORT_SYMBOL(acpi_unregister_ioapic);
583
584 static unsigned long __init
585 acpi_scan_rsdp(unsigned long start, unsigned long length)
586 {
587 unsigned long offset = 0;
588 unsigned long sig_len = sizeof("RSD PTR ") - 1;
589
590 /*
591 * Scan all 16-byte boundaries of the physical memory region for the
592 * RSDP signature.
593 */
594 for (offset = 0; offset < length; offset += 16) {
595 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
596 continue;
597 return (start + offset);
598 }
599
600 return 0;
601 }
602
603 static int __init acpi_parse_sbf(struct acpi_table_header *table)
604 {
605 struct acpi_table_boot *sb;
606
607 sb = (struct acpi_table_boot *)table;
608 if (!sb) {
609 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
610 return -ENODEV;
611 }
612
613 sbf_port = sb->cmos_index; /* Save CMOS port */
614
615 return 0;
616 }
617
618 #ifdef CONFIG_HPET_TIMER
619 #include <asm/hpet.h>
620
621 static struct __initdata resource *hpet_res;
622
623 static int __init acpi_parse_hpet(struct acpi_table_header *table)
624 {
625 struct acpi_table_hpet *hpet_tbl;
626
627 hpet_tbl = (struct acpi_table_hpet *)table;
628 if (!hpet_tbl) {
629 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
630 return -ENODEV;
631 }
632
633 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
634 printk(KERN_WARNING PREFIX "HPET timers must be located in "
635 "memory.\n");
636 return -1;
637 }
638
639 hpet_address = hpet_tbl->address.address;
640
641 /*
642 * Some broken BIOSes advertise HPET at 0x0. We really do not
643 * want to allocate a resource there.
644 */
645 if (!hpet_address) {
646 printk(KERN_WARNING PREFIX
647 "HPET id: %#x base: %#lx is invalid\n",
648 hpet_tbl->id, hpet_address);
649 return 0;
650 }
651 #ifdef CONFIG_X86_64
652 /*
653 * Some even more broken BIOSes advertise HPET at
654 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
655 * some noise:
656 */
657 if (hpet_address == 0xfed0000000000000UL) {
658 if (!hpet_force_user) {
659 printk(KERN_WARNING PREFIX "HPET id: %#x "
660 "base: 0xfed0000000000000 is bogus\n "
661 "try hpet=force on the kernel command line to "
662 "fix it up to 0xfed00000.\n", hpet_tbl->id);
663 hpet_address = 0;
664 return 0;
665 }
666 printk(KERN_WARNING PREFIX
667 "HPET id: %#x base: 0xfed0000000000000 fixed up "
668 "to 0xfed00000.\n", hpet_tbl->id);
669 hpet_address >>= 32;
670 }
671 #endif
672 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
673 hpet_tbl->id, hpet_address);
674
675 /*
676 * Allocate and initialize the HPET firmware resource for adding into
677 * the resource tree during the lateinit timeframe.
678 */
679 #define HPET_RESOURCE_NAME_SIZE 9
680 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
681
682 if (!hpet_res)
683 return 0;
684
685 memset(hpet_res, 0, sizeof(*hpet_res));
686 hpet_res->name = (void *)&hpet_res[1];
687 hpet_res->flags = IORESOURCE_MEM;
688 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
689 hpet_tbl->sequence);
690
691 hpet_res->start = hpet_address;
692 hpet_res->end = hpet_address + (1 * 1024) - 1;
693
694 return 0;
695 }
696
697 /*
698 * hpet_insert_resource inserts the HPET resources used into the resource
699 * tree.
700 */
701 static __init int hpet_insert_resource(void)
702 {
703 if (!hpet_res)
704 return 1;
705
706 return insert_resource(&iomem_resource, hpet_res);
707 }
708
709 late_initcall(hpet_insert_resource);
710
711 #else
712 #define acpi_parse_hpet NULL
713 #endif
714
715 static int __init acpi_parse_fadt(struct acpi_table_header *table)
716 {
717
718 #ifdef CONFIG_X86_PM_TIMER
719 /* detect the location of the ACPI PM Timer */
720 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
721 /* FADT rev. 2 */
722 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
723 ACPI_ADR_SPACE_SYSTEM_IO)
724 return 0;
725
726 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
727 /*
728 * "X" fields are optional extensions to the original V1.0
729 * fields, so we must selectively expand V1.0 fields if the
730 * corresponding X field is zero.
731 */
732 if (!pmtmr_ioport)
733 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
734 } else {
735 /* FADT rev. 1 */
736 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
737 }
738 if (pmtmr_ioport)
739 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
740 pmtmr_ioport);
741 #endif
742 return 0;
743 }
744
745 unsigned long __init acpi_find_rsdp(void)
746 {
747 unsigned long rsdp_phys = 0;
748
749 if (efi_enabled) {
750 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
751 return efi.acpi20;
752 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
753 return efi.acpi;
754 }
755 /*
756 * Scan memory looking for the RSDP signature. First search EBDA (low
757 * memory) paragraphs and then search upper memory (E0000-FFFFF).
758 */
759 rsdp_phys = acpi_scan_rsdp(0, 0x400);
760 if (!rsdp_phys)
761 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
762
763 return rsdp_phys;
764 }
765
766 #ifdef CONFIG_X86_LOCAL_APIC
767 /*
768 * Parse LAPIC entries in MADT
769 * returns 0 on success, < 0 on error
770 */
771 static int __init acpi_parse_madt_lapic_entries(void)
772 {
773 int count;
774
775 if (!cpu_has_apic)
776 return -ENODEV;
777
778 /*
779 * Note that the LAPIC address is obtained from the MADT (32-bit value)
780 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
781 */
782
783 count =
784 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
785 acpi_parse_lapic_addr_ovr, 0);
786 if (count < 0) {
787 printk(KERN_ERR PREFIX
788 "Error parsing LAPIC address override entry\n");
789 return count;
790 }
791
792 mp_register_lapic_address(acpi_lapic_addr);
793
794 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
795 MAX_APICS);
796 if (!count) {
797 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
798 /* TBD: Cleanup to allow fallback to MPS */
799 return -ENODEV;
800 } else if (count < 0) {
801 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
802 /* TBD: Cleanup to allow fallback to MPS */
803 return count;
804 }
805
806 count =
807 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
808 if (count < 0) {
809 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
810 /* TBD: Cleanup to allow fallback to MPS */
811 return count;
812 }
813 return 0;
814 }
815 #endif /* CONFIG_X86_LOCAL_APIC */
816
817 #ifdef CONFIG_X86_IO_APIC
818 /*
819 * Parse IOAPIC related entries in MADT
820 * returns 0 on success, < 0 on error
821 */
822 static int __init acpi_parse_madt_ioapic_entries(void)
823 {
824 int count;
825
826 /*
827 * ACPI interpreter is required to complete interrupt setup,
828 * so if it is off, don't enumerate the io-apics with ACPI.
829 * If MPS is present, it will handle them,
830 * otherwise the system will stay in PIC mode
831 */
832 if (acpi_disabled || acpi_noirq) {
833 return -ENODEV;
834 }
835
836 if (!cpu_has_apic)
837 return -ENODEV;
838
839 /*
840 * if "noapic" boot option, don't look for IO-APICs
841 */
842 if (skip_ioapic_setup) {
843 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
844 "due to 'noapic' option.\n");
845 return -ENODEV;
846 }
847
848 count =
849 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
850 MAX_IO_APICS);
851 if (!count) {
852 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
853 return -ENODEV;
854 } else if (count < 0) {
855 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
856 return count;
857 }
858
859 count =
860 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
861 NR_IRQ_VECTORS);
862 if (count < 0) {
863 printk(KERN_ERR PREFIX
864 "Error parsing interrupt source overrides entry\n");
865 /* TBD: Cleanup to allow fallback to MPS */
866 return count;
867 }
868
869 /*
870 * If BIOS did not supply an INT_SRC_OVR for the SCI
871 * pretend we got one so we can set the SCI flags.
872 */
873 if (!acpi_sci_override_gsi)
874 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
875
876 /* Fill in identity legacy mapings where no override */
877 mp_config_acpi_legacy_irqs();
878
879 count =
880 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
881 NR_IRQ_VECTORS);
882 if (count < 0) {
883 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
884 /* TBD: Cleanup to allow fallback to MPS */
885 return count;
886 }
887
888 return 0;
889 }
890 #else
891 static inline int acpi_parse_madt_ioapic_entries(void)
892 {
893 return -1;
894 }
895 #endif /* !CONFIG_X86_IO_APIC */
896
897 static void __init acpi_process_madt(void)
898 {
899 #ifdef CONFIG_X86_LOCAL_APIC
900 int error;
901
902 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
903
904 /*
905 * Parse MADT LAPIC entries
906 */
907 error = acpi_parse_madt_lapic_entries();
908 if (!error) {
909 acpi_lapic = 1;
910
911 #ifdef CONFIG_X86_GENERICARCH
912 generic_bigsmp_probe();
913 #endif
914 /*
915 * Parse MADT IO-APIC entries
916 */
917 error = acpi_parse_madt_ioapic_entries();
918 if (!error) {
919 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
920 acpi_irq_balance_set(NULL);
921 acpi_ioapic = 1;
922
923 smp_found_config = 1;
924 setup_apic_routing();
925 }
926 }
927 if (error == -EINVAL) {
928 /*
929 * Dell Precision Workstation 410, 610 come here.
930 */
931 printk(KERN_ERR PREFIX
932 "Invalid BIOS MADT, disabling ACPI\n");
933 disable_acpi();
934 }
935 }
936 #endif
937 return;
938 }
939
940 #ifdef __i386__
941
942 static int __init disable_acpi_irq(const struct dmi_system_id *d)
943 {
944 if (!acpi_force) {
945 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
946 d->ident);
947 acpi_noirq_set();
948 }
949 return 0;
950 }
951
952 static int __init disable_acpi_pci(const struct dmi_system_id *d)
953 {
954 if (!acpi_force) {
955 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
956 d->ident);
957 acpi_disable_pci();
958 }
959 return 0;
960 }
961
962 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
963 {
964 if (!acpi_force) {
965 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
966 disable_acpi();
967 } else {
968 printk(KERN_NOTICE
969 "Warning: DMI blacklist says broken, but acpi forced\n");
970 }
971 return 0;
972 }
973
974 /*
975 * Limit ACPI to CPU enumeration for HT
976 */
977 static int __init force_acpi_ht(const struct dmi_system_id *d)
978 {
979 if (!acpi_force) {
980 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
981 d->ident);
982 disable_acpi();
983 acpi_ht = 1;
984 } else {
985 printk(KERN_NOTICE
986 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
987 }
988 return 0;
989 }
990
991 /*
992 * If your system is blacklisted here, but you find that acpi=force
993 * works for you, please contact acpi-devel@sourceforge.net
994 */
995 static struct dmi_system_id __initdata acpi_dmi_table[] = {
996 /*
997 * Boxes that need ACPI disabled
998 */
999 {
1000 .callback = dmi_disable_acpi,
1001 .ident = "IBM Thinkpad",
1002 .matches = {
1003 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1004 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1005 },
1006 },
1007
1008 /*
1009 * Boxes that need acpi=ht
1010 */
1011 {
1012 .callback = force_acpi_ht,
1013 .ident = "FSC Primergy T850",
1014 .matches = {
1015 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1016 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1017 },
1018 },
1019 {
1020 .callback = force_acpi_ht,
1021 .ident = "HP VISUALIZE NT Workstation",
1022 .matches = {
1023 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1024 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1025 },
1026 },
1027 {
1028 .callback = force_acpi_ht,
1029 .ident = "Compaq Workstation W8000",
1030 .matches = {
1031 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1032 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1033 },
1034 },
1035 {
1036 .callback = force_acpi_ht,
1037 .ident = "ASUS P4B266",
1038 .matches = {
1039 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1040 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1041 },
1042 },
1043 {
1044 .callback = force_acpi_ht,
1045 .ident = "ASUS P2B-DS",
1046 .matches = {
1047 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1048 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1049 },
1050 },
1051 {
1052 .callback = force_acpi_ht,
1053 .ident = "ASUS CUR-DLS",
1054 .matches = {
1055 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1056 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1057 },
1058 },
1059 {
1060 .callback = force_acpi_ht,
1061 .ident = "ABIT i440BX-W83977",
1062 .matches = {
1063 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1064 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1065 },
1066 },
1067 {
1068 .callback = force_acpi_ht,
1069 .ident = "IBM Bladecenter",
1070 .matches = {
1071 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1072 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1073 },
1074 },
1075 {
1076 .callback = force_acpi_ht,
1077 .ident = "IBM eServer xSeries 360",
1078 .matches = {
1079 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1080 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1081 },
1082 },
1083 {
1084 .callback = force_acpi_ht,
1085 .ident = "IBM eserver xSeries 330",
1086 .matches = {
1087 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1088 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1089 },
1090 },
1091 {
1092 .callback = force_acpi_ht,
1093 .ident = "IBM eserver xSeries 440",
1094 .matches = {
1095 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1096 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1097 },
1098 },
1099
1100 /*
1101 * Boxes that need ACPI PCI IRQ routing disabled
1102 */
1103 {
1104 .callback = disable_acpi_irq,
1105 .ident = "ASUS A7V",
1106 .matches = {
1107 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1108 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1109 /* newer BIOS, Revision 1011, does work */
1110 DMI_MATCH(DMI_BIOS_VERSION,
1111 "ASUS A7V ACPI BIOS Revision 1007"),
1112 },
1113 },
1114 {
1115 /*
1116 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1117 * for LPC bridge, which is needed for the PCI
1118 * interrupt links to work. DSDT fix is in bug 5966.
1119 * 2645, 2646 model numbers are shared with 600/600E/600X
1120 */
1121 .callback = disable_acpi_irq,
1122 .ident = "IBM Thinkpad 600 Series 2645",
1123 .matches = {
1124 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1125 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1126 },
1127 },
1128 {
1129 .callback = disable_acpi_irq,
1130 .ident = "IBM Thinkpad 600 Series 2646",
1131 .matches = {
1132 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1133 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1134 },
1135 },
1136 /*
1137 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1138 */
1139 { /* _BBN 0 bug */
1140 .callback = disable_acpi_pci,
1141 .ident = "ASUS PR-DLS",
1142 .matches = {
1143 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1144 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1145 DMI_MATCH(DMI_BIOS_VERSION,
1146 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1147 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1148 },
1149 },
1150 {
1151 .callback = disable_acpi_pci,
1152 .ident = "Acer TravelMate 36x Laptop",
1153 .matches = {
1154 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1155 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1156 },
1157 },
1158 {}
1159 };
1160
1161 #endif /* __i386__ */
1162
1163 /*
1164 * acpi_boot_table_init() and acpi_boot_init()
1165 * called from setup_arch(), always.
1166 * 1. checksums all tables
1167 * 2. enumerates lapics
1168 * 3. enumerates io-apics
1169 *
1170 * acpi_table_init() is separate to allow reading SRAT without
1171 * other side effects.
1172 *
1173 * side effects of acpi_boot_init:
1174 * acpi_lapic = 1 if LAPIC found
1175 * acpi_ioapic = 1 if IOAPIC found
1176 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1177 * if acpi_blacklisted() acpi_disabled = 1;
1178 * acpi_irq_model=...
1179 * ...
1180 *
1181 * return value: (currently ignored)
1182 * 0: success
1183 * !0: failure
1184 */
1185
1186 int __init acpi_boot_table_init(void)
1187 {
1188 int error;
1189
1190 #ifdef __i386__
1191 dmi_check_system(acpi_dmi_table);
1192 #endif
1193
1194 /*
1195 * If acpi_disabled, bail out
1196 * One exception: acpi=ht continues far enough to enumerate LAPICs
1197 */
1198 if (acpi_disabled && !acpi_ht)
1199 return 1;
1200
1201 /*
1202 * Initialize the ACPI boot-time table parser.
1203 */
1204 error = acpi_table_init();
1205 if (error) {
1206 disable_acpi();
1207 return error;
1208 }
1209
1210 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1211
1212 /*
1213 * blacklist may disable ACPI entirely
1214 */
1215 error = acpi_blacklisted();
1216 if (error) {
1217 if (acpi_force) {
1218 printk(KERN_WARNING PREFIX "acpi=force override\n");
1219 } else {
1220 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1221 disable_acpi();
1222 return error;
1223 }
1224 }
1225
1226 return 0;
1227 }
1228
1229 int __init acpi_boot_init(void)
1230 {
1231 /*
1232 * If acpi_disabled, bail out
1233 * One exception: acpi=ht continues far enough to enumerate LAPICs
1234 */
1235 if (acpi_disabled && !acpi_ht)
1236 return 1;
1237
1238 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1239
1240 /*
1241 * set sci_int and PM timer address
1242 */
1243 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1244
1245 /*
1246 * Process the Multiple APIC Description Table (MADT), if present
1247 */
1248 acpi_process_madt();
1249
1250 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1251
1252 return 0;
1253 }
1254
1255 static int __init parse_acpi(char *arg)
1256 {
1257 if (!arg)
1258 return -EINVAL;
1259
1260 /* "acpi=off" disables both ACPI table parsing and interpreter */
1261 if (strcmp(arg, "off") == 0) {
1262 disable_acpi();
1263 }
1264 /* acpi=force to over-ride black-list */
1265 else if (strcmp(arg, "force") == 0) {
1266 acpi_force = 1;
1267 acpi_ht = 1;
1268 acpi_disabled = 0;
1269 }
1270 /* acpi=strict disables out-of-spec workarounds */
1271 else if (strcmp(arg, "strict") == 0) {
1272 acpi_strict = 1;
1273 }
1274 /* Limit ACPI just to boot-time to enable HT */
1275 else if (strcmp(arg, "ht") == 0) {
1276 if (!acpi_force)
1277 disable_acpi();
1278 acpi_ht = 1;
1279 }
1280 /* "acpi=noirq" disables ACPI interrupt routing */
1281 else if (strcmp(arg, "noirq") == 0) {
1282 acpi_noirq_set();
1283 } else {
1284 /* Core will printk when we return error. */
1285 return -EINVAL;
1286 }
1287 return 0;
1288 }
1289 early_param("acpi", parse_acpi);
1290
1291 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1292 static int __init parse_pci(char *arg)
1293 {
1294 if (arg && strcmp(arg, "noacpi") == 0)
1295 acpi_disable_pci();
1296 return 0;
1297 }
1298 early_param("pci", parse_pci);
1299
1300 #ifdef CONFIG_X86_IO_APIC
1301 static int __init parse_acpi_skip_timer_override(char *arg)
1302 {
1303 acpi_skip_timer_override = 1;
1304 return 0;
1305 }
1306 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1307
1308 static int __init parse_acpi_use_timer_override(char *arg)
1309 {
1310 acpi_use_timer_override = 1;
1311 return 0;
1312 }
1313 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1314 #endif /* CONFIG_X86_IO_APIC */
1315
1316 static int __init setup_acpi_sci(char *s)
1317 {
1318 if (!s)
1319 return -EINVAL;
1320 if (!strcmp(s, "edge"))
1321 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1322 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1323 else if (!strcmp(s, "level"))
1324 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1325 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1326 else if (!strcmp(s, "high"))
1327 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1328 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1329 else if (!strcmp(s, "low"))
1330 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1331 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1332 else
1333 return -EINVAL;
1334 return 0;
1335 }
1336 early_param("acpi_sci", setup_acpi_sci);
1337
1338 int __acpi_acquire_global_lock(unsigned int *lock)
1339 {
1340 unsigned int old, new, val;
1341 do {
1342 old = *lock;
1343 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1344 val = cmpxchg(lock, old, new);
1345 } while (unlikely (val != old));
1346 return (new < 3) ? -1 : 0;
1347 }
1348
1349 int __acpi_release_global_lock(unsigned int *lock)
1350 {
1351 unsigned int old, new, val;
1352 do {
1353 old = *lock;
1354 new = old & ~0x3;
1355 val = cmpxchg(lock, old, new);
1356 } while (unlikely (val != old));
1357 return old & 0x1;
1358 }
Linux kernel - Deliverables
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