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Merge git://git.linux-nfs.org/pub/linux/nfs-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 * overriden 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 IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
418 * ECLR2 is IRQ's 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 irq's, 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 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 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
641 hpet_tbl->id, hpet_address);
642
643 /*
644 * Allocate and initialize the HPET firmware resource for adding into
645 * the resource tree during the lateinit timeframe.
646 */
647 #define HPET_RESOURCE_NAME_SIZE 9
648 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
649
650 if (!hpet_res)
651 return 0;
652
653 memset(hpet_res, 0, sizeof(*hpet_res));
654 hpet_res->name = (void *)&hpet_res[1];
655 hpet_res->flags = IORESOURCE_MEM;
656 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
657 hpet_tbl->sequence);
658
659 hpet_res->start = hpet_address;
660 hpet_res->end = hpet_address + (1 * 1024) - 1;
661
662 return 0;
663 }
664
665 /*
666 * hpet_insert_resource inserts the HPET resources used into the resource
667 * tree.
668 */
669 static __init int hpet_insert_resource(void)
670 {
671 if (!hpet_res)
672 return 1;
673
674 return insert_resource(&iomem_resource, hpet_res);
675 }
676
677 late_initcall(hpet_insert_resource);
678
679 #else
680 #define acpi_parse_hpet NULL
681 #endif
682
683 static int __init acpi_parse_fadt(struct acpi_table_header *table)
684 {
685
686 #ifdef CONFIG_X86_PM_TIMER
687 /* detect the location of the ACPI PM Timer */
688 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
689 /* FADT rev. 2 */
690 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
691 ACPI_ADR_SPACE_SYSTEM_IO)
692 return 0;
693
694 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
695 /*
696 * "X" fields are optional extensions to the original V1.0
697 * fields, so we must selectively expand V1.0 fields if the
698 * corresponding X field is zero.
699 */
700 if (!pmtmr_ioport)
701 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
702 } else {
703 /* FADT rev. 1 */
704 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
705 }
706 if (pmtmr_ioport)
707 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
708 pmtmr_ioport);
709 #endif
710 return 0;
711 }
712
713 unsigned long __init acpi_find_rsdp(void)
714 {
715 unsigned long rsdp_phys = 0;
716
717 if (efi_enabled) {
718 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
719 return efi.acpi20;
720 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
721 return efi.acpi;
722 }
723 /*
724 * Scan memory looking for the RSDP signature. First search EBDA (low
725 * memory) paragraphs and then search upper memory (E0000-FFFFF).
726 */
727 rsdp_phys = acpi_scan_rsdp(0, 0x400);
728 if (!rsdp_phys)
729 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
730
731 return rsdp_phys;
732 }
733
734 #ifdef CONFIG_X86_LOCAL_APIC
735 /*
736 * Parse LAPIC entries in MADT
737 * returns 0 on success, < 0 on error
738 */
739 static int __init acpi_parse_madt_lapic_entries(void)
740 {
741 int count;
742
743 if (!cpu_has_apic)
744 return -ENODEV;
745
746 /*
747 * Note that the LAPIC address is obtained from the MADT (32-bit value)
748 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
749 */
750
751 count =
752 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
753 acpi_parse_lapic_addr_ovr, 0);
754 if (count < 0) {
755 printk(KERN_ERR PREFIX
756 "Error parsing LAPIC address override entry\n");
757 return count;
758 }
759
760 mp_register_lapic_address(acpi_lapic_addr);
761
762 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
763 MAX_APICS);
764 if (!count) {
765 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
766 /* TBD: Cleanup to allow fallback to MPS */
767 return -ENODEV;
768 } else if (count < 0) {
769 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
770 /* TBD: Cleanup to allow fallback to MPS */
771 return count;
772 }
773
774 count =
775 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
776 if (count < 0) {
777 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
778 /* TBD: Cleanup to allow fallback to MPS */
779 return count;
780 }
781 return 0;
782 }
783 #endif /* CONFIG_X86_LOCAL_APIC */
784
785 #ifdef CONFIG_X86_IO_APIC
786 /*
787 * Parse IOAPIC related entries in MADT
788 * returns 0 on success, < 0 on error
789 */
790 static int __init acpi_parse_madt_ioapic_entries(void)
791 {
792 int count;
793
794 /*
795 * ACPI interpreter is required to complete interrupt setup,
796 * so if it is off, don't enumerate the io-apics with ACPI.
797 * If MPS is present, it will handle them,
798 * otherwise the system will stay in PIC mode
799 */
800 if (acpi_disabled || acpi_noirq) {
801 return -ENODEV;
802 }
803
804 if (!cpu_has_apic)
805 return -ENODEV;
806
807 /*
808 * if "noapic" boot option, don't look for IO-APICs
809 */
810 if (skip_ioapic_setup) {
811 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
812 "due to 'noapic' option.\n");
813 return -ENODEV;
814 }
815
816 count =
817 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
818 MAX_IO_APICS);
819 if (!count) {
820 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
821 return -ENODEV;
822 } else if (count < 0) {
823 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
824 return count;
825 }
826
827 count =
828 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
829 NR_IRQ_VECTORS);
830 if (count < 0) {
831 printk(KERN_ERR PREFIX
832 "Error parsing interrupt source overrides entry\n");
833 /* TBD: Cleanup to allow fallback to MPS */
834 return count;
835 }
836
837 /*
838 * If BIOS did not supply an INT_SRC_OVR for the SCI
839 * pretend we got one so we can set the SCI flags.
840 */
841 if (!acpi_sci_override_gsi)
842 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
843
844 /* Fill in identity legacy mapings where no override */
845 mp_config_acpi_legacy_irqs();
846
847 count =
848 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
849 NR_IRQ_VECTORS);
850 if (count < 0) {
851 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
852 /* TBD: Cleanup to allow fallback to MPS */
853 return count;
854 }
855
856 return 0;
857 }
858 #else
859 static inline int acpi_parse_madt_ioapic_entries(void)
860 {
861 return -1;
862 }
863 #endif /* !CONFIG_X86_IO_APIC */
864
865 static void __init acpi_process_madt(void)
866 {
867 #ifdef CONFIG_X86_LOCAL_APIC
868 int error;
869
870 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
871
872 /*
873 * Parse MADT LAPIC entries
874 */
875 error = acpi_parse_madt_lapic_entries();
876 if (!error) {
877 acpi_lapic = 1;
878
879 #ifdef CONFIG_X86_GENERICARCH
880 generic_bigsmp_probe();
881 #endif
882 /*
883 * Parse MADT IO-APIC entries
884 */
885 error = acpi_parse_madt_ioapic_entries();
886 if (!error) {
887 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
888 acpi_irq_balance_set(NULL);
889 acpi_ioapic = 1;
890
891 smp_found_config = 1;
892 setup_apic_routing();
893 }
894 }
895 if (error == -EINVAL) {
896 /*
897 * Dell Precision Workstation 410, 610 come here.
898 */
899 printk(KERN_ERR PREFIX
900 "Invalid BIOS MADT, disabling ACPI\n");
901 disable_acpi();
902 }
903 }
904 #endif
905 return;
906 }
907
908 #ifdef __i386__
909
910 static int __init disable_acpi_irq(const struct dmi_system_id *d)
911 {
912 if (!acpi_force) {
913 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
914 d->ident);
915 acpi_noirq_set();
916 }
917 return 0;
918 }
919
920 static int __init disable_acpi_pci(const struct dmi_system_id *d)
921 {
922 if (!acpi_force) {
923 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
924 d->ident);
925 acpi_disable_pci();
926 }
927 return 0;
928 }
929
930 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
931 {
932 if (!acpi_force) {
933 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
934 disable_acpi();
935 } else {
936 printk(KERN_NOTICE
937 "Warning: DMI blacklist says broken, but acpi forced\n");
938 }
939 return 0;
940 }
941
942 /*
943 * Limit ACPI to CPU enumeration for HT
944 */
945 static int __init force_acpi_ht(const struct dmi_system_id *d)
946 {
947 if (!acpi_force) {
948 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
949 d->ident);
950 disable_acpi();
951 acpi_ht = 1;
952 } else {
953 printk(KERN_NOTICE
954 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
955 }
956 return 0;
957 }
958
959 /*
960 * If your system is blacklisted here, but you find that acpi=force
961 * works for you, please contact acpi-devel@sourceforge.net
962 */
963 static struct dmi_system_id __initdata acpi_dmi_table[] = {
964 /*
965 * Boxes that need ACPI disabled
966 */
967 {
968 .callback = dmi_disable_acpi,
969 .ident = "IBM Thinkpad",
970 .matches = {
971 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
972 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
973 },
974 },
975
976 /*
977 * Boxes that need acpi=ht
978 */
979 {
980 .callback = force_acpi_ht,
981 .ident = "FSC Primergy T850",
982 .matches = {
983 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
984 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
985 },
986 },
987 {
988 .callback = force_acpi_ht,
989 .ident = "HP VISUALIZE NT Workstation",
990 .matches = {
991 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
992 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
993 },
994 },
995 {
996 .callback = force_acpi_ht,
997 .ident = "Compaq Workstation W8000",
998 .matches = {
999 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1000 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1001 },
1002 },
1003 {
1004 .callback = force_acpi_ht,
1005 .ident = "ASUS P4B266",
1006 .matches = {
1007 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1008 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1009 },
1010 },
1011 {
1012 .callback = force_acpi_ht,
1013 .ident = "ASUS P2B-DS",
1014 .matches = {
1015 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1016 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1017 },
1018 },
1019 {
1020 .callback = force_acpi_ht,
1021 .ident = "ASUS CUR-DLS",
1022 .matches = {
1023 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1024 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1025 },
1026 },
1027 {
1028 .callback = force_acpi_ht,
1029 .ident = "ABIT i440BX-W83977",
1030 .matches = {
1031 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1032 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1033 },
1034 },
1035 {
1036 .callback = force_acpi_ht,
1037 .ident = "IBM Bladecenter",
1038 .matches = {
1039 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1040 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1041 },
1042 },
1043 {
1044 .callback = force_acpi_ht,
1045 .ident = "IBM eServer xSeries 360",
1046 .matches = {
1047 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1048 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1049 },
1050 },
1051 {
1052 .callback = force_acpi_ht,
1053 .ident = "IBM eserver xSeries 330",
1054 .matches = {
1055 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1056 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1057 },
1058 },
1059 {
1060 .callback = force_acpi_ht,
1061 .ident = "IBM eserver xSeries 440",
1062 .matches = {
1063 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1064 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1065 },
1066 },
1067
1068 /*
1069 * Boxes that need ACPI PCI IRQ routing disabled
1070 */
1071 {
1072 .callback = disable_acpi_irq,
1073 .ident = "ASUS A7V",
1074 .matches = {
1075 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1076 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1077 /* newer BIOS, Revision 1011, does work */
1078 DMI_MATCH(DMI_BIOS_VERSION,
1079 "ASUS A7V ACPI BIOS Revision 1007"),
1080 },
1081 },
1082 {
1083 /*
1084 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1085 * for LPC bridge, which is needed for the PCI
1086 * interrupt links to work. DSDT fix is in bug 5966.
1087 * 2645, 2646 model numbers are shared with 600/600E/600X
1088 */
1089 .callback = disable_acpi_irq,
1090 .ident = "IBM Thinkpad 600 Series 2645",
1091 .matches = {
1092 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1093 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1094 },
1095 },
1096 {
1097 .callback = disable_acpi_irq,
1098 .ident = "IBM Thinkpad 600 Series 2646",
1099 .matches = {
1100 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1101 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1102 },
1103 },
1104 /*
1105 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1106 */
1107 { /* _BBN 0 bug */
1108 .callback = disable_acpi_pci,
1109 .ident = "ASUS PR-DLS",
1110 .matches = {
1111 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1112 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1113 DMI_MATCH(DMI_BIOS_VERSION,
1114 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1115 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1116 },
1117 },
1118 {
1119 .callback = disable_acpi_pci,
1120 .ident = "Acer TravelMate 36x Laptop",
1121 .matches = {
1122 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1123 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1124 },
1125 },
1126 {}
1127 };
1128
1129 #endif /* __i386__ */
1130
1131 /*
1132 * acpi_boot_table_init() and acpi_boot_init()
1133 * called from setup_arch(), always.
1134 * 1. checksums all tables
1135 * 2. enumerates lapics
1136 * 3. enumerates io-apics
1137 *
1138 * acpi_table_init() is separate to allow reading SRAT without
1139 * other side effects.
1140 *
1141 * side effects of acpi_boot_init:
1142 * acpi_lapic = 1 if LAPIC found
1143 * acpi_ioapic = 1 if IOAPIC found
1144 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1145 * if acpi_blacklisted() acpi_disabled = 1;
1146 * acpi_irq_model=...
1147 * ...
1148 *
1149 * return value: (currently ignored)
1150 * 0: success
1151 * !0: failure
1152 */
1153
1154 int __init acpi_boot_table_init(void)
1155 {
1156 int error;
1157
1158 #ifdef __i386__
1159 dmi_check_system(acpi_dmi_table);
1160 #endif
1161
1162 /*
1163 * If acpi_disabled, bail out
1164 * One exception: acpi=ht continues far enough to enumerate LAPICs
1165 */
1166 if (acpi_disabled && !acpi_ht)
1167 return 1;
1168
1169 /*
1170 * Initialize the ACPI boot-time table parser.
1171 */
1172 error = acpi_table_init();
1173 if (error) {
1174 disable_acpi();
1175 return error;
1176 }
1177
1178 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1179
1180 /*
1181 * blacklist may disable ACPI entirely
1182 */
1183 error = acpi_blacklisted();
1184 if (error) {
1185 if (acpi_force) {
1186 printk(KERN_WARNING PREFIX "acpi=force override\n");
1187 } else {
1188 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1189 disable_acpi();
1190 return error;
1191 }
1192 }
1193
1194 return 0;
1195 }
1196
1197 int __init acpi_boot_init(void)
1198 {
1199 /*
1200 * If acpi_disabled, bail out
1201 * One exception: acpi=ht continues far enough to enumerate LAPICs
1202 */
1203 if (acpi_disabled && !acpi_ht)
1204 return 1;
1205
1206 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1207
1208 /*
1209 * set sci_int and PM timer address
1210 */
1211 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1212
1213 /*
1214 * Process the Multiple APIC Description Table (MADT), if present
1215 */
1216 acpi_process_madt();
1217
1218 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1219
1220 return 0;
1221 }
1222
1223 static int __init parse_acpi(char *arg)
1224 {
1225 if (!arg)
1226 return -EINVAL;
1227
1228 /* "acpi=off" disables both ACPI table parsing and interpreter */
1229 if (strcmp(arg, "off") == 0) {
1230 disable_acpi();
1231 }
1232 /* acpi=force to over-ride black-list */
1233 else if (strcmp(arg, "force") == 0) {
1234 acpi_force = 1;
1235 acpi_ht = 1;
1236 acpi_disabled = 0;
1237 }
1238 /* acpi=strict disables out-of-spec workarounds */
1239 else if (strcmp(arg, "strict") == 0) {
1240 acpi_strict = 1;
1241 }
1242 /* Limit ACPI just to boot-time to enable HT */
1243 else if (strcmp(arg, "ht") == 0) {
1244 if (!acpi_force)
1245 disable_acpi();
1246 acpi_ht = 1;
1247 }
1248 /* "acpi=noirq" disables ACPI interrupt routing */
1249 else if (strcmp(arg, "noirq") == 0) {
1250 acpi_noirq_set();
1251 } else {
1252 /* Core will printk when we return error. */
1253 return -EINVAL;
1254 }
1255 return 0;
1256 }
1257 early_param("acpi", parse_acpi);
1258
1259 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1260 static int __init parse_pci(char *arg)
1261 {
1262 if (arg && strcmp(arg, "noacpi") == 0)
1263 acpi_disable_pci();
1264 return 0;
1265 }
1266 early_param("pci", parse_pci);
1267
1268 #ifdef CONFIG_X86_IO_APIC
1269 static int __init parse_acpi_skip_timer_override(char *arg)
1270 {
1271 acpi_skip_timer_override = 1;
1272 return 0;
1273 }
1274 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1275
1276 static int __init parse_acpi_use_timer_override(char *arg)
1277 {
1278 acpi_use_timer_override = 1;
1279 return 0;
1280 }
1281 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1282 #endif /* CONFIG_X86_IO_APIC */
1283
1284 static int __init setup_acpi_sci(char *s)
1285 {
1286 if (!s)
1287 return -EINVAL;
1288 if (!strcmp(s, "edge"))
1289 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1290 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1291 else if (!strcmp(s, "level"))
1292 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1293 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1294 else if (!strcmp(s, "high"))
1295 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1296 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1297 else if (!strcmp(s, "low"))
1298 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1299 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1300 else
1301 return -EINVAL;
1302 return 0;
1303 }
1304 early_param("acpi_sci", setup_acpi_sci);
1305
1306 int __acpi_acquire_global_lock(unsigned int *lock)
1307 {
1308 unsigned int old, new, val;
1309 do {
1310 old = *lock;
1311 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1312 val = cmpxchg(lock, old, new);
1313 } while (unlikely (val != old));
1314 return (new < 3) ? -1 : 0;
1315 }
1316
1317 int __acpi_release_global_lock(unsigned int *lock)
1318 {
1319 unsigned int old, new, val;
1320 do {
1321 old = *lock;
1322 new = old & ~0x3;
1323 val = cmpxchg(lock, old, new);
1324 } while (unlikely (val != old));
1325 return old & 0x1;
1326 }
Linux kernel - Deliverables
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