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