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[linux-rt-nao.git] / arch / x86 / kernel / acpi / boot.c
bloba18eb7ce223643c8c9d6f40303c8180fa7d59e47
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 #include <asm/smp.h>
43
44 static int __initdata acpi_force = 0;
45 u32 acpi_rsdt_forced;
46 #ifdef CONFIG_ACPI
47 int acpi_disabled = 0;
48 #else
49 int acpi_disabled = 1;
50 #endif
51 EXPORT_SYMBOL(acpi_disabled);
52
53 #ifdef CONFIG_X86_64
54 # include <asm/proto.h>
55 #endif /* X86 */
56
57 #define BAD_MADT_ENTRY(entry, end) ( \
58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
60
61 #define PREFIX "ACPI: "
62
63 int acpi_noirq; /* skip ACPI IRQ initialization */
64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
65 EXPORT_SYMBOL(acpi_pci_disabled);
66 int acpi_ht __initdata = 1; /* enable HT */
67
68 int acpi_lapic;
69 int acpi_ioapic;
70 int acpi_strict;
71
72 u8 acpi_sci_flags __initdata;
73 int acpi_sci_override_gsi __initdata;
74 int acpi_skip_timer_override __initdata;
75 int acpi_use_timer_override __initdata;
76
77 #ifdef CONFIG_X86_LOCAL_APIC
78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
79 #endif
80
81 #ifndef __HAVE_ARCH_CMPXCHG
82 #warning ACPI uses CMPXCHG, i486 and later hardware
83 #endif
84
85 /* --------------------------------------------------------------------------
86 Boot-time Configuration
87 -------------------------------------------------------------------------- */
88
89 /*
90 * The default interrupt routing model is PIC (8259). This gets
91 * overridden if IOAPICs are enumerated (below).
92 */
93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
94
95
96 /*
97 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
98 * to map the target physical address. The problem is that set_fixmap()
99 * provides a single page, and it is possible that the page is not
100 * sufficient.
101 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
102 * i.e. until the next __va_range() call.
103 *
104 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
105 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
106 * count idx down while incrementing the phys address.
107 */
108 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
109 {
110
111 if (!phys || !size)
112 return NULL;
113
114 return early_ioremap(phys, size);
115 }
116 void __init __acpi_unmap_table(char *map, unsigned long size)
117 {
118 if (!map || !size)
119 return;
120
121 early_iounmap(map, size);
122 }
123
124 #ifdef CONFIG_PCI_MMCONFIG
125
126 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
127
128 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
129 struct acpi_mcfg_allocation *pci_mmcfg_config;
130 int pci_mmcfg_config_num;
131
132 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
133 {
134 if (!strcmp(mcfg->header.oem_id, "SGI"))
135 acpi_mcfg_64bit_base_addr = TRUE;
136
137 return 0;
138 }
139
140 int __init acpi_parse_mcfg(struct acpi_table_header *header)
141 {
142 struct acpi_table_mcfg *mcfg;
143 unsigned long i;
144 int config_size;
145
146 if (!header)
147 return -EINVAL;
148
149 mcfg = (struct acpi_table_mcfg *)header;
150
151 /* how many config structures do we have */
152 pci_mmcfg_config_num = 0;
153 i = header->length - sizeof(struct acpi_table_mcfg);
154 while (i >= sizeof(struct acpi_mcfg_allocation)) {
155 ++pci_mmcfg_config_num;
156 i -= sizeof(struct acpi_mcfg_allocation);
157 };
158 if (pci_mmcfg_config_num == 0) {
159 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
160 return -ENODEV;
161 }
162
163 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
164 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
165 if (!pci_mmcfg_config) {
166 printk(KERN_WARNING PREFIX
167 "No memory for MCFG config tables\n");
168 return -ENOMEM;
169 }
170
171 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
172
173 acpi_mcfg_oem_check(mcfg);
174
175 for (i = 0; i < pci_mmcfg_config_num; ++i) {
176 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
177 !acpi_mcfg_64bit_base_addr) {
178 printk(KERN_ERR PREFIX
179 "MMCONFIG not in low 4GB of memory\n");
180 kfree(pci_mmcfg_config);
181 pci_mmcfg_config_num = 0;
182 return -ENODEV;
183 }
184 }
185
186 return 0;
187 }
188 #endif /* CONFIG_PCI_MMCONFIG */
189
190 #ifdef CONFIG_X86_LOCAL_APIC
191 static int __init acpi_parse_madt(struct acpi_table_header *table)
192 {
193 struct acpi_table_madt *madt = NULL;
194
195 if (!cpu_has_apic)
196 return -EINVAL;
197
198 madt = (struct acpi_table_madt *)table;
199 if (!madt) {
200 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
201 return -ENODEV;
202 }
203
204 if (madt->address) {
205 acpi_lapic_addr = (u64) madt->address;
206
207 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
208 madt->address);
209 }
210
211 default_acpi_madt_oem_check(madt->header.oem_id,
212 madt->header.oem_table_id);
213
214 return 0;
215 }
216
217 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
218 {
219 unsigned int ver = 0;
220
221 if (!enabled) {
222 ++disabled_cpus;
223 return;
224 }
225
226 if (boot_cpu_physical_apicid != -1U)
227 ver = apic_version[boot_cpu_physical_apicid];
228
229 generic_processor_info(id, ver);
230 }
231
232 static int __init
233 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
234 {
235 struct acpi_madt_local_apic *processor = NULL;
236
237 processor = (struct acpi_madt_local_apic *)header;
238
239 if (BAD_MADT_ENTRY(processor, end))
240 return -EINVAL;
241
242 acpi_table_print_madt_entry(header);
243
244 /*
245 * We need to register disabled CPU as well to permit
246 * counting disabled CPUs. This allows us to size
247 * cpus_possible_map more accurately, to permit
248 * to not preallocating memory for all NR_CPUS
249 * when we use CPU hotplug.
250 */
251 acpi_register_lapic(processor->id, /* APIC ID */
252 processor->lapic_flags & ACPI_MADT_ENABLED);
253
254 return 0;
255 }
256
257 static int __init
258 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
259 {
260 struct acpi_madt_local_sapic *processor = NULL;
261
262 processor = (struct acpi_madt_local_sapic *)header;
263
264 if (BAD_MADT_ENTRY(processor, end))
265 return -EINVAL;
266
267 acpi_table_print_madt_entry(header);
268
269 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
270 processor->lapic_flags & ACPI_MADT_ENABLED);
271
272 return 0;
273 }
274
275 static int __init
276 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
277 const unsigned long end)
278 {
279 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
280
281 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
282
283 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
284 return -EINVAL;
285
286 acpi_lapic_addr = lapic_addr_ovr->address;
287
288 return 0;
289 }
290
291 static int __init
292 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
293 {
294 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
295
296 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
297
298 if (BAD_MADT_ENTRY(lapic_nmi, end))
299 return -EINVAL;
300
301 acpi_table_print_madt_entry(header);
302
303 if (lapic_nmi->lint != 1)
304 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
305
306 return 0;
307 }
308
309 #endif /*CONFIG_X86_LOCAL_APIC */
310
311 #ifdef CONFIG_X86_IO_APIC
312
313 static int __init
314 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
315 {
316 struct acpi_madt_io_apic *ioapic = NULL;
317
318 ioapic = (struct acpi_madt_io_apic *)header;
319
320 if (BAD_MADT_ENTRY(ioapic, end))
321 return -EINVAL;
322
323 acpi_table_print_madt_entry(header);
324
325 mp_register_ioapic(ioapic->id,
326 ioapic->address, ioapic->global_irq_base);
327
328 return 0;
329 }
330
331 /*
332 * Parse Interrupt Source Override for the ACPI SCI
333 */
334 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
335 {
336 if (trigger == 0) /* compatible SCI trigger is level */
337 trigger = 3;
338
339 if (polarity == 0) /* compatible SCI polarity is low */
340 polarity = 3;
341
342 /* Command-line over-ride via acpi_sci= */
343 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
344 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
345
346 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
347 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
348
349 /*
350 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
351 * If GSI is < 16, this will update its flags,
352 * else it will create a new mp_irqs[] entry.
353 */
354 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
355
356 /*
357 * stash over-ride to indicate we've been here
358 * and for later update of acpi_gbl_FADT
359 */
360 acpi_sci_override_gsi = gsi;
361 return;
362 }
363
364 static int __init
365 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
366 const unsigned long end)
367 {
368 struct acpi_madt_interrupt_override *intsrc = NULL;
369
370 intsrc = (struct acpi_madt_interrupt_override *)header;
371
372 if (BAD_MADT_ENTRY(intsrc, end))
373 return -EINVAL;
374
375 acpi_table_print_madt_entry(header);
376
377 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
378 acpi_sci_ioapic_setup(intsrc->global_irq,
379 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
380 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
381 return 0;
382 }
383
384 if (acpi_skip_timer_override &&
385 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
386 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
387 return 0;
388 }
389
390 mp_override_legacy_irq(intsrc->source_irq,
391 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
392 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
393 intsrc->global_irq);
394
395 return 0;
396 }
397
398 static int __init
399 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
400 {
401 struct acpi_madt_nmi_source *nmi_src = NULL;
402
403 nmi_src = (struct acpi_madt_nmi_source *)header;
404
405 if (BAD_MADT_ENTRY(nmi_src, end))
406 return -EINVAL;
407
408 acpi_table_print_madt_entry(header);
409
410 /* TBD: Support nimsrc entries? */
411
412 return 0;
413 }
414
415 #endif /* CONFIG_X86_IO_APIC */
416
417 /*
418 * acpi_pic_sci_set_trigger()
419 *
420 * use ELCR to set PIC-mode trigger type for SCI
421 *
422 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
423 * it may require Edge Trigger -- use "acpi_sci=edge"
424 *
425 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
426 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
427 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
428 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
429 */
430
431 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
432 {
433 unsigned int mask = 1 << irq;
434 unsigned int old, new;
435
436 /* Real old ELCR mask */
437 old = inb(0x4d0) | (inb(0x4d1) << 8);
438
439 /*
440 * If we use ACPI to set PCI IRQs, then we should clear ELCR
441 * since we will set it correctly as we enable the PCI irq
442 * routing.
443 */
444 new = acpi_noirq ? old : 0;
445
446 /*
447 * Update SCI information in the ELCR, it isn't in the PCI
448 * routing tables..
449 */
450 switch (trigger) {
451 case 1: /* Edge - clear */
452 new &= ~mask;
453 break;
454 case 3: /* Level - set */
455 new |= mask;
456 break;
457 }
458
459 if (old == new)
460 return;
461
462 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
463 outb(new, 0x4d0);
464 outb(new >> 8, 0x4d1);
465 }
466
467 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
468 {
469 *irq = gsi;
470 return 0;
471 }
472
473 /*
474 * success: return IRQ number (>=0)
475 * failure: return < 0
476 */
477 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
478 {
479 unsigned int irq;
480 unsigned int plat_gsi = gsi;
481
482 #ifdef CONFIG_PCI
483 /*
484 * Make sure all (legacy) PCI IRQs are set as level-triggered.
485 */
486 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
487 if (triggering == ACPI_LEVEL_SENSITIVE)
488 eisa_set_level_irq(gsi);
489 }
490 #endif
491
492 #ifdef CONFIG_X86_IO_APIC
493 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
494 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
495 }
496 #endif
497 acpi_gsi_to_irq(plat_gsi, &irq);
498 return irq;
499 }
500
501 /*
502 * ACPI based hotplug support for CPU
503 */
504 #ifdef CONFIG_ACPI_HOTPLUG_CPU
505
506 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
507 {
508 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
509 union acpi_object *obj;
510 struct acpi_madt_local_apic *lapic;
511 cpumask_var_t tmp_map, new_map;
512 u8 physid;
513 int cpu;
514 int retval = -ENOMEM;
515
516 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
517 return -EINVAL;
518
519 if (!buffer.length || !buffer.pointer)
520 return -EINVAL;
521
522 obj = buffer.pointer;
523 if (obj->type != ACPI_TYPE_BUFFER ||
524 obj->buffer.length < sizeof(*lapic)) {
525 kfree(buffer.pointer);
526 return -EINVAL;
527 }
528
529 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
530
531 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
532 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
533 kfree(buffer.pointer);
534 return -EINVAL;
535 }
536
537 physid = lapic->id;
538
539 kfree(buffer.pointer);
540 buffer.length = ACPI_ALLOCATE_BUFFER;
541 buffer.pointer = NULL;
542
543 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
544 goto out;
545
546 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
547 goto free_tmp_map;
548
549 cpumask_copy(tmp_map, cpu_present_mask);
550 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
551
552 /*
553 * If mp_register_lapic successfully generates a new logical cpu
554 * number, then the following will get us exactly what was mapped
555 */
556 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
557 if (cpumask_empty(new_map)) {
558 printk ("Unable to map lapic to logical cpu number\n");
559 retval = -EINVAL;
560 goto free_new_map;
561 }
562
563 cpu = cpumask_first(new_map);
564
565 *pcpu = cpu;
566 retval = 0;
567
568 free_new_map:
569 free_cpumask_var(new_map);
570 free_tmp_map:
571 free_cpumask_var(tmp_map);
572 out:
573 return retval;
574 }
575
576 /* wrapper to silence section mismatch warning */
577 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
578 {
579 return _acpi_map_lsapic(handle, pcpu);
580 }
581 EXPORT_SYMBOL(acpi_map_lsapic);
582
583 int acpi_unmap_lsapic(int cpu)
584 {
585 per_cpu(x86_cpu_to_apicid, cpu) = -1;
586 set_cpu_present(cpu, false);
587 num_processors--;
588
589 return (0);
590 }
591
592 EXPORT_SYMBOL(acpi_unmap_lsapic);
593 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
594
595 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
596 {
597 /* TBD */
598 return -EINVAL;
599 }
600
601 EXPORT_SYMBOL(acpi_register_ioapic);
602
603 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
604 {
605 /* TBD */
606 return -EINVAL;
607 }
608
609 EXPORT_SYMBOL(acpi_unregister_ioapic);
610
611 static int __init acpi_parse_sbf(struct acpi_table_header *table)
612 {
613 struct acpi_table_boot *sb;
614
615 sb = (struct acpi_table_boot *)table;
616 if (!sb) {
617 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
618 return -ENODEV;
619 }
620
621 sbf_port = sb->cmos_index; /* Save CMOS port */
622
623 return 0;
624 }
625
626 #ifdef CONFIG_HPET_TIMER
627 #include <asm/hpet.h>
628
629 static struct __initdata resource *hpet_res;
630
631 static int __init acpi_parse_hpet(struct acpi_table_header *table)
632 {
633 struct acpi_table_hpet *hpet_tbl;
634
635 hpet_tbl = (struct acpi_table_hpet *)table;
636 if (!hpet_tbl) {
637 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
638 return -ENODEV;
639 }
640
641 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
642 printk(KERN_WARNING PREFIX "HPET timers must be located in "
643 "memory.\n");
644 return -1;
645 }
646
647 hpet_address = hpet_tbl->address.address;
648
649 /*
650 * Some broken BIOSes advertise HPET at 0x0. We really do not
651 * want to allocate a resource there.
652 */
653 if (!hpet_address) {
654 printk(KERN_WARNING PREFIX
655 "HPET id: %#x base: %#lx is invalid\n",
656 hpet_tbl->id, hpet_address);
657 return 0;
658 }
659 #ifdef CONFIG_X86_64
660 /*
661 * Some even more broken BIOSes advertise HPET at
662 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
663 * some noise:
664 */
665 if (hpet_address == 0xfed0000000000000UL) {
666 if (!hpet_force_user) {
667 printk(KERN_WARNING PREFIX "HPET id: %#x "
668 "base: 0xfed0000000000000 is bogus\n "
669 "try hpet=force on the kernel command line to "
670 "fix it up to 0xfed00000.\n", hpet_tbl->id);
671 hpet_address = 0;
672 return 0;
673 }
674 printk(KERN_WARNING PREFIX
675 "HPET id: %#x base: 0xfed0000000000000 fixed up "
676 "to 0xfed00000.\n", hpet_tbl->id);
677 hpet_address >>= 32;
678 }
679 #endif
680 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
681 hpet_tbl->id, hpet_address);
682
683 /*
684 * Allocate and initialize the HPET firmware resource for adding into
685 * the resource tree during the lateinit timeframe.
686 */
687 #define HPET_RESOURCE_NAME_SIZE 9
688 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
689
690 hpet_res->name = (void *)&hpet_res[1];
691 hpet_res->flags = IORESOURCE_MEM;
692 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
693 hpet_tbl->sequence);
694
695 hpet_res->start = hpet_address;
696 hpet_res->end = hpet_address + (1 * 1024) - 1;
697
698 return 0;
699 }
700
701 /*
702 * hpet_insert_resource inserts the HPET resources used into the resource
703 * tree.
704 */
705 static __init int hpet_insert_resource(void)
706 {
707 if (!hpet_res)
708 return 1;
709
710 return insert_resource(&iomem_resource, hpet_res);
711 }
712
713 late_initcall(hpet_insert_resource);
714
715 #else
716 #define acpi_parse_hpet NULL
717 #endif
718
719 static int __init acpi_parse_fadt(struct acpi_table_header *table)
720 {
721
722 #ifdef CONFIG_X86_PM_TIMER
723 /* detect the location of the ACPI PM Timer */
724 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
725 /* FADT rev. 2 */
726 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
727 ACPI_ADR_SPACE_SYSTEM_IO)
728 return 0;
729
730 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
731 /*
732 * "X" fields are optional extensions to the original V1.0
733 * fields, so we must selectively expand V1.0 fields if the
734 * corresponding X field is zero.
735 */
736 if (!pmtmr_ioport)
737 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
738 } else {
739 /* FADT rev. 1 */
740 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
741 }
742 if (pmtmr_ioport)
743 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
744 pmtmr_ioport);
745 #endif
746 return 0;
747 }
748
749 #ifdef CONFIG_X86_LOCAL_APIC
750 /*
751 * Parse LAPIC entries in MADT
752 * returns 0 on success, < 0 on error
753 */
754
755 static void __init acpi_register_lapic_address(unsigned long address)
756 {
757 mp_lapic_addr = address;
758
759 set_fixmap_nocache(FIX_APIC_BASE, address);
760 if (boot_cpu_physical_apicid == -1U) {
761 boot_cpu_physical_apicid = read_apic_id();
762 apic_version[boot_cpu_physical_apicid] =
763 GET_APIC_VERSION(apic_read(APIC_LVR));
764 }
765 }
766
767 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
768 {
769 int count;
770
771 if (!cpu_has_apic)
772 return -ENODEV;
773
774 /*
775 * Note that the LAPIC address is obtained from the MADT (32-bit value)
776 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
777 */
778
779 count =
780 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
781 acpi_parse_lapic_addr_ovr, 0);
782 if (count < 0) {
783 printk(KERN_ERR PREFIX
784 "Error parsing LAPIC address override entry\n");
785 return count;
786 }
787
788 acpi_register_lapic_address(acpi_lapic_addr);
789
790 return count;
791 }
792
793 static int __init acpi_parse_madt_lapic_entries(void)
794 {
795 int count;
796
797 if (!cpu_has_apic)
798 return -ENODEV;
799
800 /*
801 * Note that the LAPIC address is obtained from the MADT (32-bit value)
802 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
803 */
804
805 count =
806 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
807 acpi_parse_lapic_addr_ovr, 0);
808 if (count < 0) {
809 printk(KERN_ERR PREFIX
810 "Error parsing LAPIC address override entry\n");
811 return count;
812 }
813
814 acpi_register_lapic_address(acpi_lapic_addr);
815
816 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
817 acpi_parse_sapic, MAX_APICS);
818
819 if (!count)
820 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
821 acpi_parse_lapic, MAX_APICS);
822 if (!count) {
823 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
824 /* TBD: Cleanup to allow fallback to MPS */
825 return -ENODEV;
826 } else if (count < 0) {
827 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
828 /* TBD: Cleanup to allow fallback to MPS */
829 return count;
830 }
831
832 count =
833 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
834 if (count < 0) {
835 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
836 /* TBD: Cleanup to allow fallback to MPS */
837 return count;
838 }
839 return 0;
840 }
841 #endif /* CONFIG_X86_LOCAL_APIC */
842
843 #ifdef CONFIG_X86_IO_APIC
844 #define MP_ISA_BUS 0
845
846 #ifdef CONFIG_X86_ES7000
847 extern int es7000_plat;
848 #endif
849
850 static struct {
851 int apic_id;
852 int gsi_base;
853 int gsi_end;
854 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
855 } mp_ioapic_routing[MAX_IO_APICS];
856
857 int mp_find_ioapic(int gsi)
858 {
859 int i = 0;
860
861 /* Find the IOAPIC that manages this GSI. */
862 for (i = 0; i < nr_ioapics; i++) {
863 if ((gsi >= mp_ioapic_routing[i].gsi_base)
864 && (gsi <= mp_ioapic_routing[i].gsi_end))
865 return i;
866 }
867
868 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
869 return -1;
870 }
871
872 int mp_find_ioapic_pin(int ioapic, int gsi)
873 {
874 if (WARN_ON(ioapic == -1))
875 return -1;
876 if (WARN_ON(gsi > mp_ioapic_routing[ioapic].gsi_end))
877 return -1;
878
879 return gsi - mp_ioapic_routing[ioapic].gsi_base;
880 }
881
882 static u8 __init uniq_ioapic_id(u8 id)
883 {
884 #ifdef CONFIG_X86_32
885 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
886 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
887 return io_apic_get_unique_id(nr_ioapics, id);
888 else
889 return id;
890 #else
891 int i;
892 DECLARE_BITMAP(used, 256);
893 bitmap_zero(used, 256);
894 for (i = 0; i < nr_ioapics; i++) {
895 struct mpc_ioapic *ia = &mp_ioapics[i];
896 __set_bit(ia->apicid, used);
897 }
898 if (!test_bit(id, used))
899 return id;
900 return find_first_zero_bit(used, 256);
901 #endif
902 }
903
904 static int bad_ioapic(unsigned long address)
905 {
906 if (nr_ioapics >= MAX_IO_APICS) {
907 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
908 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
909 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
910 }
911 if (!address) {
912 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
913 " found in table, skipping!\n");
914 return 1;
915 }
916 return 0;
917 }
918
919 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
920 {
921 int idx = 0;
922
923 if (bad_ioapic(address))
924 return;
925
926 idx = nr_ioapics;
927
928 mp_ioapics[idx].type = MP_IOAPIC;
929 mp_ioapics[idx].flags = MPC_APIC_USABLE;
930 mp_ioapics[idx].apicaddr = address;
931
932 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
933 mp_ioapics[idx].apicid = uniq_ioapic_id(id);
934 #ifdef CONFIG_X86_32
935 mp_ioapics[idx].apicver = io_apic_get_version(idx);
936 #else
937 mp_ioapics[idx].apicver = 0;
938 #endif
939 /*
940 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
941 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
942 */
943 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].apicid;
944 mp_ioapic_routing[idx].gsi_base = gsi_base;
945 mp_ioapic_routing[idx].gsi_end = gsi_base +
946 io_apic_get_redir_entries(idx);
947
948 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
949 "GSI %d-%d\n", idx, mp_ioapics[idx].apicid,
950 mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr,
951 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
952
953 nr_ioapics++;
954 }
955
956 int __init acpi_probe_gsi(void)
957 {
958 int idx;
959 int gsi;
960 int max_gsi = 0;
961
962 if (acpi_disabled)
963 return 0;
964
965 if (!acpi_ioapic)
966 return 0;
967
968 max_gsi = 0;
969 for (idx = 0; idx < nr_ioapics; idx++) {
970 gsi = mp_ioapic_routing[idx].gsi_end;
971
972 if (gsi > max_gsi)
973 max_gsi = gsi;
974 }
975
976 return max_gsi + 1;
977 }
978
979 static void assign_to_mp_irq(struct mpc_intsrc *m,
980 struct mpc_intsrc *mp_irq)
981 {
982 memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
983 }
984
985 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
986 struct mpc_intsrc *m)
987 {
988 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
989 }
990
991 static void save_mp_irq(struct mpc_intsrc *m)
992 {
993 int i;
994
995 for (i = 0; i < mp_irq_entries; i++) {
996 if (!mp_irq_cmp(&mp_irqs[i], m))
997 return;
998 }
999
1000 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
1001 if (++mp_irq_entries == MAX_IRQ_SOURCES)
1002 panic("Max # of irq sources exceeded!!\n");
1003 }
1004
1005 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
1006 {
1007 int ioapic;
1008 int pin;
1009 struct mpc_intsrc mp_irq;
1010
1011 /*
1012 * Convert 'gsi' to 'ioapic.pin'.
1013 */
1014 ioapic = mp_find_ioapic(gsi);
1015 if (ioapic < 0)
1016 return;
1017 pin = mp_find_ioapic_pin(ioapic, gsi);
1018
1019 /*
1020 * TBD: This check is for faulty timer entries, where the override
1021 * erroneously sets the trigger to level, resulting in a HUGE
1022 * increase of timer interrupts!
1023 */
1024 if ((bus_irq == 0) && (trigger == 3))
1025 trigger = 1;
1026
1027 mp_irq.type = MP_INTSRC;
1028 mp_irq.irqtype = mp_INT;
1029 mp_irq.irqflag = (trigger << 2) | polarity;
1030 mp_irq.srcbus = MP_ISA_BUS;
1031 mp_irq.srcbusirq = bus_irq; /* IRQ */
1032 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
1033 mp_irq.dstirq = pin; /* INTIN# */
1034
1035 save_mp_irq(&mp_irq);
1036 }
1037
1038 void __init mp_config_acpi_legacy_irqs(void)
1039 {
1040 int i;
1041 int ioapic;
1042 unsigned int dstapic;
1043 struct mpc_intsrc mp_irq;
1044
1045 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1046 /*
1047 * Fabricate the legacy ISA bus (bus #31).
1048 */
1049 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1050 #endif
1051 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1052 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1053
1054 #ifdef CONFIG_X86_ES7000
1055 /*
1056 * Older generations of ES7000 have no legacy identity mappings
1057 */
1058 if (es7000_plat == 1)
1059 return;
1060 #endif
1061
1062 /*
1063 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1064 */
1065 ioapic = mp_find_ioapic(0);
1066 if (ioapic < 0)
1067 return;
1068 dstapic = mp_ioapics[ioapic].apicid;
1069
1070 /*
1071 * Use the default configuration for the IRQs 0-15. Unless
1072 * overridden by (MADT) interrupt source override entries.
1073 */
1074 for (i = 0; i < 16; i++) {
1075 int idx;
1076
1077 for (idx = 0; idx < mp_irq_entries; idx++) {
1078 struct mpc_intsrc *irq = mp_irqs + idx;
1079
1080 /* Do we already have a mapping for this ISA IRQ? */
1081 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1082 break;
1083
1084 /* Do we already have a mapping for this IOAPIC pin */
1085 if (irq->dstapic == dstapic && irq->dstirq == i)
1086 break;
1087 }
1088
1089 if (idx != mp_irq_entries) {
1090 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1091 continue; /* IRQ already used */
1092 }
1093
1094 mp_irq.type = MP_INTSRC;
1095 mp_irq.irqflag = 0; /* Conforming */
1096 mp_irq.srcbus = MP_ISA_BUS;
1097 mp_irq.dstapic = dstapic;
1098 mp_irq.irqtype = mp_INT;
1099 mp_irq.srcbusirq = i; /* Identity mapped */
1100 mp_irq.dstirq = i;
1101
1102 save_mp_irq(&mp_irq);
1103 }
1104 }
1105
1106 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1107 {
1108 int ioapic;
1109 int ioapic_pin;
1110 #ifdef CONFIG_X86_32
1111 #define MAX_GSI_NUM 4096
1112 #define IRQ_COMPRESSION_START 64
1113
1114 static int pci_irq = IRQ_COMPRESSION_START;
1115 /*
1116 * Mapping between Global System Interrupts, which
1117 * represent all possible interrupts, and IRQs
1118 * assigned to actual devices.
1119 */
1120 static int gsi_to_irq[MAX_GSI_NUM];
1121 #else
1122
1123 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1124 return gsi;
1125 #endif
1126
1127 /* Don't set up the ACPI SCI because it's already set up */
1128 if (acpi_gbl_FADT.sci_interrupt == gsi)
1129 return gsi;
1130
1131 ioapic = mp_find_ioapic(gsi);
1132 if (ioapic < 0) {
1133 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1134 return gsi;
1135 }
1136
1137 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1138
1139 #ifdef CONFIG_X86_32
1140 if (ioapic_renumber_irq)
1141 gsi = ioapic_renumber_irq(ioapic, gsi);
1142 #endif
1143
1144 /*
1145 * Avoid pin reprogramming. PRTs typically include entries
1146 * with redundant pin->gsi mappings (but unique PCI devices);
1147 * we only program the IOAPIC on the first.
1148 */
1149 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1150 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1151 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1152 ioapic_pin);
1153 return gsi;
1154 }
1155 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1156 pr_debug("Pin %d-%d already programmed\n",
1157 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1158 #ifdef CONFIG_X86_32
1159 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1160 #else
1161 return gsi;
1162 #endif
1163 }
1164
1165 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1166 #ifdef CONFIG_X86_32
1167 /*
1168 * For GSI >= 64, use IRQ compression
1169 */
1170 if ((gsi >= IRQ_COMPRESSION_START)
1171 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1172 /*
1173 * For PCI devices assign IRQs in order, avoiding gaps
1174 * due to unused I/O APIC pins.
1175 */
1176 int irq = gsi;
1177 if (gsi < MAX_GSI_NUM) {
1178 /*
1179 * Retain the VIA chipset work-around (gsi > 15), but
1180 * avoid a problem where the 8254 timer (IRQ0) is setup
1181 * via an override (so it's not on pin 0 of the ioapic),
1182 * and at the same time, the pin 0 interrupt is a PCI
1183 * type. The gsi > 15 test could cause these two pins
1184 * to be shared as IRQ0, and they are not shareable.
1185 * So test for this condition, and if necessary, avoid
1186 * the pin collision.
1187 */
1188 gsi = pci_irq++;
1189 /*
1190 * Don't assign IRQ used by ACPI SCI
1191 */
1192 if (gsi == acpi_gbl_FADT.sci_interrupt)
1193 gsi = pci_irq++;
1194 gsi_to_irq[irq] = gsi;
1195 } else {
1196 printk(KERN_ERR "GSI %u is too high\n", gsi);
1197 return gsi;
1198 }
1199 }
1200 #endif
1201 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1202 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1203 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1204 return gsi;
1205 }
1206
1207 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1208 u32 gsi, int triggering, int polarity)
1209 {
1210 #ifdef CONFIG_X86_MPPARSE
1211 struct mpc_intsrc mp_irq;
1212 int ioapic;
1213
1214 if (!acpi_ioapic)
1215 return 0;
1216
1217 /* print the entry should happen on mptable identically */
1218 mp_irq.type = MP_INTSRC;
1219 mp_irq.irqtype = mp_INT;
1220 mp_irq.irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1221 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1222 mp_irq.srcbus = number;
1223 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1224 ioapic = mp_find_ioapic(gsi);
1225 mp_irq.dstapic = mp_ioapic_routing[ioapic].apic_id;
1226 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1227
1228 save_mp_irq(&mp_irq);
1229 #endif
1230 return 0;
1231 }
1232
1233 /*
1234 * Parse IOAPIC related entries in MADT
1235 * returns 0 on success, < 0 on error
1236 */
1237 static int __init acpi_parse_madt_ioapic_entries(void)
1238 {
1239 int count;
1240
1241 /*
1242 * ACPI interpreter is required to complete interrupt setup,
1243 * so if it is off, don't enumerate the io-apics with ACPI.
1244 * If MPS is present, it will handle them,
1245 * otherwise the system will stay in PIC mode
1246 */
1247 if (acpi_disabled || acpi_noirq) {
1248 return -ENODEV;
1249 }
1250
1251 if (!cpu_has_apic)
1252 return -ENODEV;
1253
1254 /*
1255 * if "noapic" boot option, don't look for IO-APICs
1256 */
1257 if (skip_ioapic_setup) {
1258 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1259 "due to 'noapic' option.\n");
1260 return -ENODEV;
1261 }
1262
1263 count =
1264 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1265 MAX_IO_APICS);
1266 if (!count) {
1267 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1268 return -ENODEV;
1269 } else if (count < 0) {
1270 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1271 return count;
1272 }
1273
1274 count =
1275 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1276 nr_irqs);
1277 if (count < 0) {
1278 printk(KERN_ERR PREFIX
1279 "Error parsing interrupt source overrides entry\n");
1280 /* TBD: Cleanup to allow fallback to MPS */
1281 return count;
1282 }
1283
1284 /*
1285 * If BIOS did not supply an INT_SRC_OVR for the SCI
1286 * pretend we got one so we can set the SCI flags.
1287 */
1288 if (!acpi_sci_override_gsi)
1289 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1290
1291 /* Fill in identity legacy mapings where no override */
1292 mp_config_acpi_legacy_irqs();
1293
1294 count =
1295 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1296 nr_irqs);
1297 if (count < 0) {
1298 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1299 /* TBD: Cleanup to allow fallback to MPS */
1300 return count;
1301 }
1302
1303 return 0;
1304 }
1305 #else
1306 static inline int acpi_parse_madt_ioapic_entries(void)
1307 {
1308 return -1;
1309 }
1310 #endif /* !CONFIG_X86_IO_APIC */
1311
1312 static void __init early_acpi_process_madt(void)
1313 {
1314 #ifdef CONFIG_X86_LOCAL_APIC
1315 int error;
1316
1317 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1318
1319 /*
1320 * Parse MADT LAPIC entries
1321 */
1322 error = early_acpi_parse_madt_lapic_addr_ovr();
1323 if (!error) {
1324 acpi_lapic = 1;
1325 smp_found_config = 1;
1326 }
1327 if (error == -EINVAL) {
1328 /*
1329 * Dell Precision Workstation 410, 610 come here.
1330 */
1331 printk(KERN_ERR PREFIX
1332 "Invalid BIOS MADT, disabling ACPI\n");
1333 disable_acpi();
1334 }
1335 }
1336 #endif
1337 }
1338
1339 static void __init acpi_process_madt(void)
1340 {
1341 #ifdef CONFIG_X86_LOCAL_APIC
1342 int error;
1343
1344 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1345
1346 /*
1347 * Parse MADT LAPIC entries
1348 */
1349 error = acpi_parse_madt_lapic_entries();
1350 if (!error) {
1351 acpi_lapic = 1;
1352
1353 #ifdef CONFIG_X86_BIGSMP
1354 generic_bigsmp_probe();
1355 #endif
1356 /*
1357 * Parse MADT IO-APIC entries
1358 */
1359 error = acpi_parse_madt_ioapic_entries();
1360 if (!error) {
1361 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1362 acpi_ioapic = 1;
1363
1364 smp_found_config = 1;
1365 if (apic->setup_apic_routing)
1366 apic->setup_apic_routing();
1367 }
1368 }
1369 if (error == -EINVAL) {
1370 /*
1371 * Dell Precision Workstation 410, 610 come here.
1372 */
1373 printk(KERN_ERR PREFIX
1374 "Invalid BIOS MADT, disabling ACPI\n");
1375 disable_acpi();
1376 }
1377 } else {
1378 /*
1379 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1380 * In the event an MPS table was found, forget it.
1381 * Boot with "acpi=off" to use MPS on such a system.
1382 */
1383 if (smp_found_config) {
1384 printk(KERN_WARNING PREFIX
1385 "No APIC-table, disabling MPS\n");
1386 smp_found_config = 0;
1387 }
1388 }
1389
1390 /*
1391 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1392 * processors, where MPS only supports physical.
1393 */
1394 if (acpi_lapic && acpi_ioapic)
1395 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1396 "information\n");
1397 else if (acpi_lapic)
1398 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1399 "configuration information\n");
1400 #endif
1401 return;
1402 }
1403
1404 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1405 {
1406 if (!acpi_force) {
1407 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1408 d->ident);
1409 acpi_noirq_set();
1410 }
1411 return 0;
1412 }
1413
1414 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1415 {
1416 if (!acpi_force) {
1417 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1418 d->ident);
1419 acpi_disable_pci();
1420 }
1421 return 0;
1422 }
1423
1424 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1425 {
1426 if (!acpi_force) {
1427 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1428 disable_acpi();
1429 } else {
1430 printk(KERN_NOTICE
1431 "Warning: DMI blacklist says broken, but acpi forced\n");
1432 }
1433 return 0;
1434 }
1435
1436 /*
1437 * Limit ACPI to CPU enumeration for HT
1438 */
1439 static int __init force_acpi_ht(const struct dmi_system_id *d)
1440 {
1441 if (!acpi_force) {
1442 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1443 d->ident);
1444 disable_acpi();
1445 acpi_ht = 1;
1446 } else {
1447 printk(KERN_NOTICE
1448 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1449 }
1450 return 0;
1451 }
1452
1453 /*
1454 * Force ignoring BIOS IRQ0 pin2 override
1455 */
1456 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1457 {
1458 /*
1459 * The ati_ixp4x0_rev() early PCI quirk should have set
1460 * the acpi_skip_timer_override flag already:
1461 */
1462 if (!acpi_skip_timer_override) {
1463 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1464 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1465 d->ident);
1466 acpi_skip_timer_override = 1;
1467 }
1468 return 0;
1469 }
1470
1471 /*
1472 * If your system is blacklisted here, but you find that acpi=force
1473 * works for you, please contact acpi-devel@sourceforge.net
1474 */
1475 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1476 /*
1477 * Boxes that need ACPI disabled
1478 */
1479 {
1480 .callback = dmi_disable_acpi,
1481 .ident = "IBM Thinkpad",
1482 .matches = {
1483 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1484 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1485 },
1486 },
1487
1488 /*
1489 * Boxes that need acpi=ht
1490 */
1491 {
1492 .callback = force_acpi_ht,
1493 .ident = "FSC Primergy T850",
1494 .matches = {
1495 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1496 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1497 },
1498 },
1499 {
1500 .callback = force_acpi_ht,
1501 .ident = "HP VISUALIZE NT Workstation",
1502 .matches = {
1503 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1504 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1505 },
1506 },
1507 {
1508 .callback = force_acpi_ht,
1509 .ident = "Compaq Workstation W8000",
1510 .matches = {
1511 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1512 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1513 },
1514 },
1515 {
1516 .callback = force_acpi_ht,
1517 .ident = "ASUS P4B266",
1518 .matches = {
1519 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1520 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1521 },
1522 },
1523 {
1524 .callback = force_acpi_ht,
1525 .ident = "ASUS P2B-DS",
1526 .matches = {
1527 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1528 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1529 },
1530 },
1531 {
1532 .callback = force_acpi_ht,
1533 .ident = "ASUS CUR-DLS",
1534 .matches = {
1535 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1536 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1537 },
1538 },
1539 {
1540 .callback = force_acpi_ht,
1541 .ident = "ABIT i440BX-W83977",
1542 .matches = {
1543 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1544 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1545 },
1546 },
1547 {
1548 .callback = force_acpi_ht,
1549 .ident = "IBM Bladecenter",
1550 .matches = {
1551 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1552 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1553 },
1554 },
1555 {
1556 .callback = force_acpi_ht,
1557 .ident = "IBM eServer xSeries 360",
1558 .matches = {
1559 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1560 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1561 },
1562 },
1563 {
1564 .callback = force_acpi_ht,
1565 .ident = "IBM eserver xSeries 330",
1566 .matches = {
1567 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1568 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1569 },
1570 },
1571 {
1572 .callback = force_acpi_ht,
1573 .ident = "IBM eserver xSeries 440",
1574 .matches = {
1575 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1576 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1577 },
1578 },
1579
1580 /*
1581 * Boxes that need ACPI PCI IRQ routing disabled
1582 */
1583 {
1584 .callback = disable_acpi_irq,
1585 .ident = "ASUS A7V",
1586 .matches = {
1587 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1588 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1589 /* newer BIOS, Revision 1011, does work */
1590 DMI_MATCH(DMI_BIOS_VERSION,
1591 "ASUS A7V ACPI BIOS Revision 1007"),
1592 },
1593 },
1594 {
1595 /*
1596 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1597 * for LPC bridge, which is needed for the PCI
1598 * interrupt links to work. DSDT fix is in bug 5966.
1599 * 2645, 2646 model numbers are shared with 600/600E/600X
1600 */
1601 .callback = disable_acpi_irq,
1602 .ident = "IBM Thinkpad 600 Series 2645",
1603 .matches = {
1604 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1605 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1606 },
1607 },
1608 {
1609 .callback = disable_acpi_irq,
1610 .ident = "IBM Thinkpad 600 Series 2646",
1611 .matches = {
1612 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1613 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1614 },
1615 },
1616 /*
1617 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1618 */
1619 { /* _BBN 0 bug */
1620 .callback = disable_acpi_pci,
1621 .ident = "ASUS PR-DLS",
1622 .matches = {
1623 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1624 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1625 DMI_MATCH(DMI_BIOS_VERSION,
1626 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1627 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1628 },
1629 },
1630 {
1631 .callback = disable_acpi_pci,
1632 .ident = "Acer TravelMate 36x Laptop",
1633 .matches = {
1634 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1635 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1636 },
1637 },
1638 {}
1639 };
1640
1641 /* second table for DMI checks that should run after early-quirks */
1642 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1643 /*
1644 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1645 * which includes some code which overrides all temperature
1646 * trip points to 16C if the INTIN2 input of the I/O APIC
1647 * is enabled. This input is incorrectly designated the
1648 * ISA IRQ 0 via an interrupt source override even though
1649 * it is wired to the output of the master 8259A and INTIN0
1650 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1651 * override in that cases.
1652 */
1653 {
1654 .callback = dmi_ignore_irq0_timer_override,
1655 .ident = "HP nx6115 laptop",
1656 .matches = {
1657 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1658 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1659 },
1660 },
1661 {
1662 .callback = dmi_ignore_irq0_timer_override,
1663 .ident = "HP NX6125 laptop",
1664 .matches = {
1665 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1666 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1667 },
1668 },
1669 {
1670 .callback = dmi_ignore_irq0_timer_override,
1671 .ident = "HP NX6325 laptop",
1672 .matches = {
1673 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1674 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1675 },
1676 },
1677 {
1678 .callback = dmi_ignore_irq0_timer_override,
1679 .ident = "HP 6715b laptop",
1680 .matches = {
1681 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1682 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1683 },
1684 },
1685 {}
1686 };
1687
1688 /*
1689 * acpi_boot_table_init() and acpi_boot_init()
1690 * called from setup_arch(), always.
1691 * 1. checksums all tables
1692 * 2. enumerates lapics
1693 * 3. enumerates io-apics
1694 *
1695 * acpi_table_init() is separate to allow reading SRAT without
1696 * other side effects.
1697 *
1698 * side effects of acpi_boot_init:
1699 * acpi_lapic = 1 if LAPIC found
1700 * acpi_ioapic = 1 if IOAPIC found
1701 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1702 * if acpi_blacklisted() acpi_disabled = 1;
1703 * acpi_irq_model=...
1704 * ...
1705 *
1706 * return value: (currently ignored)
1707 * 0: success
1708 * !0: failure
1709 */
1710
1711 int __init acpi_boot_table_init(void)
1712 {
1713 int error;
1714
1715 dmi_check_system(acpi_dmi_table);
1716
1717 /*
1718 * If acpi_disabled, bail out
1719 * One exception: acpi=ht continues far enough to enumerate LAPICs
1720 */
1721 if (acpi_disabled && !acpi_ht)
1722 return 1;
1723
1724 /*
1725 * Initialize the ACPI boot-time table parser.
1726 */
1727 error = acpi_table_init();
1728 if (error) {
1729 disable_acpi();
1730 return error;
1731 }
1732
1733 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1734
1735 /*
1736 * blacklist may disable ACPI entirely
1737 */
1738 error = acpi_blacklisted();
1739 if (error) {
1740 if (acpi_force) {
1741 printk(KERN_WARNING PREFIX "acpi=force override\n");
1742 } else {
1743 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1744 disable_acpi();
1745 return error;
1746 }
1747 }
1748
1749 return 0;
1750 }
1751
1752 int __init early_acpi_boot_init(void)
1753 {
1754 /*
1755 * If acpi_disabled, bail out
1756 * One exception: acpi=ht continues far enough to enumerate LAPICs
1757 */
1758 if (acpi_disabled && !acpi_ht)
1759 return 1;
1760
1761 /*
1762 * Process the Multiple APIC Description Table (MADT), if present
1763 */
1764 early_acpi_process_madt();
1765
1766 return 0;
1767 }
1768
1769 int __init acpi_boot_init(void)
1770 {
1771 /* those are executed after early-quirks are executed */
1772 dmi_check_system(acpi_dmi_table_late);
1773
1774 /*
1775 * If acpi_disabled, bail out
1776 * One exception: acpi=ht continues far enough to enumerate LAPICs
1777 */
1778 if (acpi_disabled && !acpi_ht)
1779 return 1;
1780
1781 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1782
1783 /*
1784 * set sci_int and PM timer address
1785 */
1786 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1787
1788 /*
1789 * Process the Multiple APIC Description Table (MADT), if present
1790 */
1791 acpi_process_madt();
1792
1793 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1794
1795 return 0;
1796 }
1797
1798 static int __init parse_acpi(char *arg)
1799 {
1800 if (!arg)
1801 return -EINVAL;
1802
1803 /* "acpi=off" disables both ACPI table parsing and interpreter */
1804 if (strcmp(arg, "off") == 0) {
1805 disable_acpi();
1806 }
1807 /* acpi=force to over-ride black-list */
1808 else if (strcmp(arg, "force") == 0) {
1809 acpi_force = 1;
1810 acpi_ht = 1;
1811 acpi_disabled = 0;
1812 }
1813 /* acpi=strict disables out-of-spec workarounds */
1814 else if (strcmp(arg, "strict") == 0) {
1815 acpi_strict = 1;
1816 }
1817 /* Limit ACPI just to boot-time to enable HT */
1818 else if (strcmp(arg, "ht") == 0) {
1819 if (!acpi_force)
1820 disable_acpi();
1821 acpi_ht = 1;
1822 }
1823 /* acpi=rsdt use RSDT instead of XSDT */
1824 else if (strcmp(arg, "rsdt") == 0) {
1825 acpi_rsdt_forced = 1;
1826 }
1827 /* "acpi=noirq" disables ACPI interrupt routing */
1828 else if (strcmp(arg, "noirq") == 0) {
1829 acpi_noirq_set();
1830 } else {
1831 /* Core will printk when we return error. */
1832 return -EINVAL;
1833 }
1834 return 0;
1835 }
1836 early_param("acpi", parse_acpi);
1837
1838 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1839 static int __init parse_pci(char *arg)
1840 {
1841 if (arg && strcmp(arg, "noacpi") == 0)
1842 acpi_disable_pci();
1843 return 0;
1844 }
1845 early_param("pci", parse_pci);
1846
1847 int __init acpi_mps_check(void)
1848 {
1849 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1850 /* mptable code is not built-in*/
1851 if (acpi_disabled || acpi_noirq) {
1852 printk(KERN_WARNING "MPS support code is not built-in.\n"
1853 "Using acpi=off or acpi=noirq or pci=noacpi "
1854 "may have problem\n");
1855 return 1;
1856 }
1857 #endif
1858 return 0;
1859 }
1860
1861 #ifdef CONFIG_X86_IO_APIC
1862 static int __init parse_acpi_skip_timer_override(char *arg)
1863 {
1864 acpi_skip_timer_override = 1;
1865 return 0;
1866 }
1867 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1868
1869 static int __init parse_acpi_use_timer_override(char *arg)
1870 {
1871 acpi_use_timer_override = 1;
1872 return 0;
1873 }
1874 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1875 #endif /* CONFIG_X86_IO_APIC */
1876
1877 static int __init setup_acpi_sci(char *s)
1878 {
1879 if (!s)
1880 return -EINVAL;
1881 if (!strcmp(s, "edge"))
1882 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1883 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1884 else if (!strcmp(s, "level"))
1885 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1886 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1887 else if (!strcmp(s, "high"))
1888 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1889 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1890 else if (!strcmp(s, "low"))
1891 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1892 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1893 else
1894 return -EINVAL;
1895 return 0;
1896 }
1897 early_param("acpi_sci", setup_acpi_sci);
1898
1899 int __acpi_acquire_global_lock(unsigned int *lock)
1900 {
1901 unsigned int old, new, val;
1902 do {
1903 old = *lock;
1904 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1905 val = cmpxchg(lock, old, new);
1906 } while (unlikely (val != old));
1907 return (new < 3) ? -1 : 0;
1908 }
1909
1910 int __acpi_release_global_lock(unsigned int *lock)
1911 {
1912 unsigned int old, new, val;
1913 do {
1914 old = *lock;
1915 new = old & ~0x3;
1916 val = cmpxchg(lock, old, new);
1917 } while (unlikely (val != old));
1918 return old & 0x1;
1919 }
(Inofficial) Linux kernel tree running on the Nao robot