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x86: unstatic mp_find_ioapic so it can be used elsewhere
[linux-2.6/linux-2.6-openrd.git] / arch / x86 / kernel / acpi / boot.c
blob068b900f4b0639a7109dd2116767ec4645d12b4b
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/genapic.h>
41 #include <asm/io.h>
42 #include <asm/mpspec.h>
43 #include <asm/smp.h>
44
45 static int __initdata acpi_force = 0;
46 u32 acpi_rsdt_forced;
47 #ifdef CONFIG_ACPI
48 int acpi_disabled = 0;
49 #else
50 int acpi_disabled = 1;
51 #endif
52 EXPORT_SYMBOL(acpi_disabled);
53
54 #ifdef CONFIG_X86_64
55 # include <asm/proto.h>
56 #endif /* X86 */
57
58 #define BAD_MADT_ENTRY(entry, end) ( \
59 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
60 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
61
62 #define PREFIX "ACPI: "
63
64 int acpi_noirq; /* skip ACPI IRQ initialization */
65 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
66 EXPORT_SYMBOL(acpi_pci_disabled);
67 int acpi_ht __initdata = 1; /* enable HT */
68
69 int acpi_lapic;
70 int acpi_ioapic;
71 int acpi_strict;
72
73 u8 acpi_sci_flags __initdata;
74 int acpi_sci_override_gsi __initdata;
75 int acpi_skip_timer_override __initdata;
76 int acpi_use_timer_override __initdata;
77
78 #ifdef CONFIG_X86_LOCAL_APIC
79 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
80 #endif
81
82 #ifndef __HAVE_ARCH_CMPXCHG
83 #warning ACPI uses CMPXCHG, i486 and later hardware
84 #endif
85
86 /* --------------------------------------------------------------------------
87 Boot-time Configuration
88 -------------------------------------------------------------------------- */
89
90 /*
91 * The default interrupt routing model is PIC (8259). This gets
92 * overridden if IOAPICs are enumerated (below).
93 */
94 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
95
96
97 /*
98 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
99 * to map the target physical address. The problem is that set_fixmap()
100 * provides a single page, and it is possible that the page is not
101 * sufficient.
102 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
103 * i.e. until the next __va_range() call.
104 *
105 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
106 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
107 * count idx down while incrementing the phys address.
108 */
109 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
110 {
111 unsigned long base, offset, mapped_size;
112 int idx;
113
114 if (!phys || !size)
115 return NULL;
116
117 if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
118 return __va(phys);
119
120 offset = phys & (PAGE_SIZE - 1);
121 mapped_size = PAGE_SIZE - offset;
122 clear_fixmap(FIX_ACPI_END);
123 set_fixmap(FIX_ACPI_END, phys);
124 base = fix_to_virt(FIX_ACPI_END);
125
126 /*
127 * Most cases can be covered by the below.
128 */
129 idx = FIX_ACPI_END;
130 while (mapped_size < size) {
131 if (--idx < FIX_ACPI_BEGIN)
132 return NULL; /* cannot handle this */
133 phys += PAGE_SIZE;
134 clear_fixmap(idx);
135 set_fixmap(idx, phys);
136 mapped_size += PAGE_SIZE;
137 }
138
139 return ((unsigned char *)base + offset);
140 }
141
142 #ifdef CONFIG_PCI_MMCONFIG
143
144 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
145
146 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
147 struct acpi_mcfg_allocation *pci_mmcfg_config;
148 int pci_mmcfg_config_num;
149
150 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
151 {
152 if (!strcmp(mcfg->header.oem_id, "SGI"))
153 acpi_mcfg_64bit_base_addr = TRUE;
154
155 return 0;
156 }
157
158 int __init acpi_parse_mcfg(struct acpi_table_header *header)
159 {
160 struct acpi_table_mcfg *mcfg;
161 unsigned long i;
162 int config_size;
163
164 if (!header)
165 return -EINVAL;
166
167 mcfg = (struct acpi_table_mcfg *)header;
168
169 /* how many config structures do we have */
170 pci_mmcfg_config_num = 0;
171 i = header->length - sizeof(struct acpi_table_mcfg);
172 while (i >= sizeof(struct acpi_mcfg_allocation)) {
173 ++pci_mmcfg_config_num;
174 i -= sizeof(struct acpi_mcfg_allocation);
175 };
176 if (pci_mmcfg_config_num == 0) {
177 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
178 return -ENODEV;
179 }
180
181 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
182 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
183 if (!pci_mmcfg_config) {
184 printk(KERN_WARNING PREFIX
185 "No memory for MCFG config tables\n");
186 return -ENOMEM;
187 }
188
189 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
190
191 acpi_mcfg_oem_check(mcfg);
192
193 for (i = 0; i < pci_mmcfg_config_num; ++i) {
194 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
195 !acpi_mcfg_64bit_base_addr) {
196 printk(KERN_ERR PREFIX
197 "MMCONFIG not in low 4GB of memory\n");
198 kfree(pci_mmcfg_config);
199 pci_mmcfg_config_num = 0;
200 return -ENODEV;
201 }
202 }
203
204 return 0;
205 }
206 #endif /* CONFIG_PCI_MMCONFIG */
207
208 #ifdef CONFIG_X86_LOCAL_APIC
209 static int __init acpi_parse_madt(struct acpi_table_header *table)
210 {
211 struct acpi_table_madt *madt = NULL;
212
213 if (!cpu_has_apic)
214 return -EINVAL;
215
216 madt = (struct acpi_table_madt *)table;
217 if (!madt) {
218 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
219 return -ENODEV;
220 }
221
222 if (madt->address) {
223 acpi_lapic_addr = (u64) madt->address;
224
225 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
226 madt->address);
227 }
228
229 default_acpi_madt_oem_check(madt->header.oem_id,
230 madt->header.oem_table_id);
231
232 return 0;
233 }
234
235 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
236 {
237 unsigned int ver = 0;
238
239 if (!enabled) {
240 ++disabled_cpus;
241 return;
242 }
243
244 if (boot_cpu_physical_apicid != -1U)
245 ver = apic_version[boot_cpu_physical_apicid];
246
247 generic_processor_info(id, ver);
248 }
249
250 static int __init
251 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
252 {
253 struct acpi_madt_local_apic *processor = NULL;
254
255 processor = (struct acpi_madt_local_apic *)header;
256
257 if (BAD_MADT_ENTRY(processor, end))
258 return -EINVAL;
259
260 acpi_table_print_madt_entry(header);
261
262 /*
263 * We need to register disabled CPU as well to permit
264 * counting disabled CPUs. This allows us to size
265 * cpus_possible_map more accurately, to permit
266 * to not preallocating memory for all NR_CPUS
267 * when we use CPU hotplug.
268 */
269 acpi_register_lapic(processor->id, /* APIC ID */
270 processor->lapic_flags & ACPI_MADT_ENABLED);
271
272 return 0;
273 }
274
275 static int __init
276 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
277 {
278 struct acpi_madt_local_sapic *processor = NULL;
279
280 processor = (struct acpi_madt_local_sapic *)header;
281
282 if (BAD_MADT_ENTRY(processor, end))
283 return -EINVAL;
284
285 acpi_table_print_madt_entry(header);
286
287 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
288 processor->lapic_flags & ACPI_MADT_ENABLED);
289
290 return 0;
291 }
292
293 static int __init
294 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
295 const unsigned long end)
296 {
297 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
298
299 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
300
301 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
302 return -EINVAL;
303
304 acpi_lapic_addr = lapic_addr_ovr->address;
305
306 return 0;
307 }
308
309 static int __init
310 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
311 {
312 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
313
314 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
315
316 if (BAD_MADT_ENTRY(lapic_nmi, end))
317 return -EINVAL;
318
319 acpi_table_print_madt_entry(header);
320
321 if (lapic_nmi->lint != 1)
322 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
323
324 return 0;
325 }
326
327 #endif /*CONFIG_X86_LOCAL_APIC */
328
329 #ifdef CONFIG_X86_IO_APIC
330
331 static int __init
332 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
333 {
334 struct acpi_madt_io_apic *ioapic = NULL;
335
336 ioapic = (struct acpi_madt_io_apic *)header;
337
338 if (BAD_MADT_ENTRY(ioapic, end))
339 return -EINVAL;
340
341 acpi_table_print_madt_entry(header);
342
343 mp_register_ioapic(ioapic->id,
344 ioapic->address, ioapic->global_irq_base);
345
346 return 0;
347 }
348
349 /*
350 * Parse Interrupt Source Override for the ACPI SCI
351 */
352 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
353 {
354 if (trigger == 0) /* compatible SCI trigger is level */
355 trigger = 3;
356
357 if (polarity == 0) /* compatible SCI polarity is low */
358 polarity = 3;
359
360 /* Command-line over-ride via acpi_sci= */
361 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
362 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
363
364 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
365 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
366
367 /*
368 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
369 * If GSI is < 16, this will update its flags,
370 * else it will create a new mp_irqs[] entry.
371 */
372 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
373
374 /*
375 * stash over-ride to indicate we've been here
376 * and for later update of acpi_gbl_FADT
377 */
378 acpi_sci_override_gsi = gsi;
379 return;
380 }
381
382 static int __init
383 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
384 const unsigned long end)
385 {
386 struct acpi_madt_interrupt_override *intsrc = NULL;
387
388 intsrc = (struct acpi_madt_interrupt_override *)header;
389
390 if (BAD_MADT_ENTRY(intsrc, end))
391 return -EINVAL;
392
393 acpi_table_print_madt_entry(header);
394
395 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
396 acpi_sci_ioapic_setup(intsrc->global_irq,
397 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
398 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
399 return 0;
400 }
401
402 if (acpi_skip_timer_override &&
403 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
404 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
405 return 0;
406 }
407
408 mp_override_legacy_irq(intsrc->source_irq,
409 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
410 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
411 intsrc->global_irq);
412
413 return 0;
414 }
415
416 static int __init
417 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
418 {
419 struct acpi_madt_nmi_source *nmi_src = NULL;
420
421 nmi_src = (struct acpi_madt_nmi_source *)header;
422
423 if (BAD_MADT_ENTRY(nmi_src, end))
424 return -EINVAL;
425
426 acpi_table_print_madt_entry(header);
427
428 /* TBD: Support nimsrc entries? */
429
430 return 0;
431 }
432
433 #endif /* CONFIG_X86_IO_APIC */
434
435 /*
436 * acpi_pic_sci_set_trigger()
437 *
438 * use ELCR to set PIC-mode trigger type for SCI
439 *
440 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
441 * it may require Edge Trigger -- use "acpi_sci=edge"
442 *
443 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
444 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
445 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
446 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
447 */
448
449 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
450 {
451 unsigned int mask = 1 << irq;
452 unsigned int old, new;
453
454 /* Real old ELCR mask */
455 old = inb(0x4d0) | (inb(0x4d1) << 8);
456
457 /*
458 * If we use ACPI to set PCI IRQs, then we should clear ELCR
459 * since we will set it correctly as we enable the PCI irq
460 * routing.
461 */
462 new = acpi_noirq ? old : 0;
463
464 /*
465 * Update SCI information in the ELCR, it isn't in the PCI
466 * routing tables..
467 */
468 switch (trigger) {
469 case 1: /* Edge - clear */
470 new &= ~mask;
471 break;
472 case 3: /* Level - set */
473 new |= mask;
474 break;
475 }
476
477 if (old == new)
478 return;
479
480 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
481 outb(new, 0x4d0);
482 outb(new >> 8, 0x4d1);
483 }
484
485 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
486 {
487 *irq = gsi;
488 return 0;
489 }
490
491 /*
492 * success: return IRQ number (>=0)
493 * failure: return < 0
494 */
495 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
496 {
497 unsigned int irq;
498 unsigned int plat_gsi = gsi;
499
500 #ifdef CONFIG_PCI
501 /*
502 * Make sure all (legacy) PCI IRQs are set as level-triggered.
503 */
504 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
505 if (triggering == ACPI_LEVEL_SENSITIVE)
506 eisa_set_level_irq(gsi);
507 }
508 #endif
509
510 #ifdef CONFIG_X86_IO_APIC
511 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
512 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
513 }
514 #endif
515 acpi_gsi_to_irq(plat_gsi, &irq);
516 return irq;
517 }
518
519 /*
520 * ACPI based hotplug support for CPU
521 */
522 #ifdef CONFIG_ACPI_HOTPLUG_CPU
523
524 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
525 {
526 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
527 union acpi_object *obj;
528 struct acpi_madt_local_apic *lapic;
529 cpumask_var_t tmp_map, new_map;
530 u8 physid;
531 int cpu;
532 int retval = -ENOMEM;
533
534 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
535 return -EINVAL;
536
537 if (!buffer.length || !buffer.pointer)
538 return -EINVAL;
539
540 obj = buffer.pointer;
541 if (obj->type != ACPI_TYPE_BUFFER ||
542 obj->buffer.length < sizeof(*lapic)) {
543 kfree(buffer.pointer);
544 return -EINVAL;
545 }
546
547 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
548
549 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
550 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
551 kfree(buffer.pointer);
552 return -EINVAL;
553 }
554
555 physid = lapic->id;
556
557 kfree(buffer.pointer);
558 buffer.length = ACPI_ALLOCATE_BUFFER;
559 buffer.pointer = NULL;
560
561 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
562 goto out;
563
564 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
565 goto free_tmp_map;
566
567 cpumask_copy(tmp_map, cpu_present_mask);
568 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
569
570 /*
571 * If mp_register_lapic successfully generates a new logical cpu
572 * number, then the following will get us exactly what was mapped
573 */
574 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
575 if (cpumask_empty(new_map)) {
576 printk ("Unable to map lapic to logical cpu number\n");
577 retval = -EINVAL;
578 goto free_new_map;
579 }
580
581 cpu = cpumask_first(new_map);
582
583 *pcpu = cpu;
584 retval = 0;
585
586 free_new_map:
587 free_cpumask_var(new_map);
588 free_tmp_map:
589 free_cpumask_var(tmp_map);
590 out:
591 return retval;
592 }
593
594 /* wrapper to silence section mismatch warning */
595 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
596 {
597 return _acpi_map_lsapic(handle, pcpu);
598 }
599 EXPORT_SYMBOL(acpi_map_lsapic);
600
601 int acpi_unmap_lsapic(int cpu)
602 {
603 per_cpu(x86_cpu_to_apicid, cpu) = -1;
604 set_cpu_present(cpu, false);
605 num_processors--;
606
607 return (0);
608 }
609
610 EXPORT_SYMBOL(acpi_unmap_lsapic);
611 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
612
613 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
614 {
615 /* TBD */
616 return -EINVAL;
617 }
618
619 EXPORT_SYMBOL(acpi_register_ioapic);
620
621 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
622 {
623 /* TBD */
624 return -EINVAL;
625 }
626
627 EXPORT_SYMBOL(acpi_unregister_ioapic);
628
629 static int __init acpi_parse_sbf(struct acpi_table_header *table)
630 {
631 struct acpi_table_boot *sb;
632
633 sb = (struct acpi_table_boot *)table;
634 if (!sb) {
635 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
636 return -ENODEV;
637 }
638
639 sbf_port = sb->cmos_index; /* Save CMOS port */
640
641 return 0;
642 }
643
644 #ifdef CONFIG_HPET_TIMER
645 #include <asm/hpet.h>
646
647 static struct __initdata resource *hpet_res;
648
649 static int __init acpi_parse_hpet(struct acpi_table_header *table)
650 {
651 struct acpi_table_hpet *hpet_tbl;
652
653 hpet_tbl = (struct acpi_table_hpet *)table;
654 if (!hpet_tbl) {
655 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
656 return -ENODEV;
657 }
658
659 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
660 printk(KERN_WARNING PREFIX "HPET timers must be located in "
661 "memory.\n");
662 return -1;
663 }
664
665 hpet_address = hpet_tbl->address.address;
666
667 /*
668 * Some broken BIOSes advertise HPET at 0x0. We really do not
669 * want to allocate a resource there.
670 */
671 if (!hpet_address) {
672 printk(KERN_WARNING PREFIX
673 "HPET id: %#x base: %#lx is invalid\n",
674 hpet_tbl->id, hpet_address);
675 return 0;
676 }
677 #ifdef CONFIG_X86_64
678 /*
679 * Some even more broken BIOSes advertise HPET at
680 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
681 * some noise:
682 */
683 if (hpet_address == 0xfed0000000000000UL) {
684 if (!hpet_force_user) {
685 printk(KERN_WARNING PREFIX "HPET id: %#x "
686 "base: 0xfed0000000000000 is bogus\n "
687 "try hpet=force on the kernel command line to "
688 "fix it up to 0xfed00000.\n", hpet_tbl->id);
689 hpet_address = 0;
690 return 0;
691 }
692 printk(KERN_WARNING PREFIX
693 "HPET id: %#x base: 0xfed0000000000000 fixed up "
694 "to 0xfed00000.\n", hpet_tbl->id);
695 hpet_address >>= 32;
696 }
697 #endif
698 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
699 hpet_tbl->id, hpet_address);
700
701 /*
702 * Allocate and initialize the HPET firmware resource for adding into
703 * the resource tree during the lateinit timeframe.
704 */
705 #define HPET_RESOURCE_NAME_SIZE 9
706 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
707
708 hpet_res->name = (void *)&hpet_res[1];
709 hpet_res->flags = IORESOURCE_MEM;
710 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
711 hpet_tbl->sequence);
712
713 hpet_res->start = hpet_address;
714 hpet_res->end = hpet_address + (1 * 1024) - 1;
715
716 return 0;
717 }
718
719 /*
720 * hpet_insert_resource inserts the HPET resources used into the resource
721 * tree.
722 */
723 static __init int hpet_insert_resource(void)
724 {
725 if (!hpet_res)
726 return 1;
727
728 return insert_resource(&iomem_resource, hpet_res);
729 }
730
731 late_initcall(hpet_insert_resource);
732
733 #else
734 #define acpi_parse_hpet NULL
735 #endif
736
737 static int __init acpi_parse_fadt(struct acpi_table_header *table)
738 {
739
740 #ifdef CONFIG_X86_PM_TIMER
741 /* detect the location of the ACPI PM Timer */
742 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
743 /* FADT rev. 2 */
744 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
745 ACPI_ADR_SPACE_SYSTEM_IO)
746 return 0;
747
748 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
749 /*
750 * "X" fields are optional extensions to the original V1.0
751 * fields, so we must selectively expand V1.0 fields if the
752 * corresponding X field is zero.
753 */
754 if (!pmtmr_ioport)
755 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
756 } else {
757 /* FADT rev. 1 */
758 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
759 }
760 if (pmtmr_ioport)
761 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
762 pmtmr_ioport);
763 #endif
764 return 0;
765 }
766
767 #ifdef CONFIG_X86_LOCAL_APIC
768 /*
769 * Parse LAPIC entries in MADT
770 * returns 0 on success, < 0 on error
771 */
772
773 static void __init acpi_register_lapic_address(unsigned long address)
774 {
775 mp_lapic_addr = address;
776
777 set_fixmap_nocache(FIX_APIC_BASE, address);
778 if (boot_cpu_physical_apicid == -1U) {
779 boot_cpu_physical_apicid = read_apic_id();
780 apic_version[boot_cpu_physical_apicid] =
781 GET_APIC_VERSION(apic_read(APIC_LVR));
782 }
783 }
784
785 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
786 {
787 int count;
788
789 if (!cpu_has_apic)
790 return -ENODEV;
791
792 /*
793 * Note that the LAPIC address is obtained from the MADT (32-bit value)
794 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
795 */
796
797 count =
798 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
799 acpi_parse_lapic_addr_ovr, 0);
800 if (count < 0) {
801 printk(KERN_ERR PREFIX
802 "Error parsing LAPIC address override entry\n");
803 return count;
804 }
805
806 acpi_register_lapic_address(acpi_lapic_addr);
807
808 return count;
809 }
810
811 static int __init acpi_parse_madt_lapic_entries(void)
812 {
813 int count;
814
815 if (!cpu_has_apic)
816 return -ENODEV;
817
818 /*
819 * Note that the LAPIC address is obtained from the MADT (32-bit value)
820 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
821 */
822
823 count =
824 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
825 acpi_parse_lapic_addr_ovr, 0);
826 if (count < 0) {
827 printk(KERN_ERR PREFIX
828 "Error parsing LAPIC address override entry\n");
829 return count;
830 }
831
832 acpi_register_lapic_address(acpi_lapic_addr);
833
834 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
835 acpi_parse_sapic, MAX_APICS);
836
837 if (!count)
838 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
839 acpi_parse_lapic, MAX_APICS);
840 if (!count) {
841 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
842 /* TBD: Cleanup to allow fallback to MPS */
843 return -ENODEV;
844 } else if (count < 0) {
845 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
846 /* TBD: Cleanup to allow fallback to MPS */
847 return count;
848 }
849
850 count =
851 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
852 if (count < 0) {
853 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
854 /* TBD: Cleanup to allow fallback to MPS */
855 return count;
856 }
857 return 0;
858 }
859 #endif /* CONFIG_X86_LOCAL_APIC */
860
861 #ifdef CONFIG_X86_IO_APIC
862 #define MP_ISA_BUS 0
863
864 #ifdef CONFIG_X86_ES7000
865 extern int es7000_plat;
866 #endif
867
868 static struct {
869 int apic_id;
870 int gsi_base;
871 int gsi_end;
872 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
873 } mp_ioapic_routing[MAX_IO_APICS];
874
875 int mp_find_ioapic(int gsi)
876 {
877 int i = 0;
878
879 /* Find the IOAPIC that manages this GSI. */
880 for (i = 0; i < nr_ioapics; i++) {
881 if ((gsi >= mp_ioapic_routing[i].gsi_base)
882 && (gsi <= mp_ioapic_routing[i].gsi_end))
883 return i;
884 }
885
886 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
887 return -1;
888 }
889
890 static u8 __init uniq_ioapic_id(u8 id)
891 {
892 #ifdef CONFIG_X86_32
893 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
894 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
895 return io_apic_get_unique_id(nr_ioapics, id);
896 else
897 return id;
898 #else
899 int i;
900 DECLARE_BITMAP(used, 256);
901 bitmap_zero(used, 256);
902 for (i = 0; i < nr_ioapics; i++) {
903 struct mpc_ioapic *ia = &mp_ioapics[i];
904 __set_bit(ia->apicid, used);
905 }
906 if (!test_bit(id, used))
907 return id;
908 return find_first_zero_bit(used, 256);
909 #endif
910 }
911
912 static int bad_ioapic(unsigned long address)
913 {
914 if (nr_ioapics >= MAX_IO_APICS) {
915 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
916 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
917 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
918 }
919 if (!address) {
920 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
921 " found in table, skipping!\n");
922 return 1;
923 }
924 return 0;
925 }
926
927 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
928 {
929 int idx = 0;
930
931 if (bad_ioapic(address))
932 return;
933
934 idx = nr_ioapics;
935
936 mp_ioapics[idx].type = MP_IOAPIC;
937 mp_ioapics[idx].flags = MPC_APIC_USABLE;
938 mp_ioapics[idx].apicaddr = address;
939
940 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
941 mp_ioapics[idx].apicid = uniq_ioapic_id(id);
942 #ifdef CONFIG_X86_32
943 mp_ioapics[idx].apicver = io_apic_get_version(idx);
944 #else
945 mp_ioapics[idx].apicver = 0;
946 #endif
947 /*
948 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
949 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
950 */
951 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].apicid;
952 mp_ioapic_routing[idx].gsi_base = gsi_base;
953 mp_ioapic_routing[idx].gsi_end = gsi_base +
954 io_apic_get_redir_entries(idx);
955
956 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
957 "GSI %d-%d\n", idx, mp_ioapics[idx].apicid,
958 mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr,
959 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
960
961 nr_ioapics++;
962 }
963
964 int __init acpi_probe_gsi(void)
965 {
966 int idx;
967 int gsi;
968 int max_gsi = 0;
969
970 if (acpi_disabled)
971 return 0;
972
973 if (!acpi_ioapic)
974 return 0;
975
976 max_gsi = 0;
977 for (idx = 0; idx < nr_ioapics; idx++) {
978 gsi = mp_ioapic_routing[idx].gsi_end;
979
980 if (gsi > max_gsi)
981 max_gsi = gsi;
982 }
983
984 return max_gsi + 1;
985 }
986
987 static void assign_to_mp_irq(struct mpc_intsrc *m,
988 struct mpc_intsrc *mp_irq)
989 {
990 memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
991 }
992
993 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
994 struct mpc_intsrc *m)
995 {
996 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
997 }
998
999 static void save_mp_irq(struct mpc_intsrc *m)
1000 {
1001 int i;
1002
1003 for (i = 0; i < mp_irq_entries; i++) {
1004 if (!mp_irq_cmp(&mp_irqs[i], m))
1005 return;
1006 }
1007
1008 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
1009 if (++mp_irq_entries == MAX_IRQ_SOURCES)
1010 panic("Max # of irq sources exceeded!!\n");
1011 }
1012
1013 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
1014 {
1015 int ioapic;
1016 int pin;
1017 struct mpc_intsrc mp_irq;
1018
1019 /*
1020 * Convert 'gsi' to 'ioapic.pin'.
1021 */
1022 ioapic = mp_find_ioapic(gsi);
1023 if (ioapic < 0)
1024 return;
1025 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1026
1027 /*
1028 * TBD: This check is for faulty timer entries, where the override
1029 * erroneously sets the trigger to level, resulting in a HUGE
1030 * increase of timer interrupts!
1031 */
1032 if ((bus_irq == 0) && (trigger == 3))
1033 trigger = 1;
1034
1035 mp_irq.type = MP_INTSRC;
1036 mp_irq.irqtype = mp_INT;
1037 mp_irq.irqflag = (trigger << 2) | polarity;
1038 mp_irq.srcbus = MP_ISA_BUS;
1039 mp_irq.srcbusirq = bus_irq; /* IRQ */
1040 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
1041 mp_irq.dstirq = pin; /* INTIN# */
1042
1043 save_mp_irq(&mp_irq);
1044 }
1045
1046 void __init mp_config_acpi_legacy_irqs(void)
1047 {
1048 int i;
1049 int ioapic;
1050 unsigned int dstapic;
1051 struct mpc_intsrc mp_irq;
1052
1053 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1054 /*
1055 * Fabricate the legacy ISA bus (bus #31).
1056 */
1057 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1058 #endif
1059 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1060 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1061
1062 #ifdef CONFIG_X86_ES7000
1063 /*
1064 * Older generations of ES7000 have no legacy identity mappings
1065 */
1066 if (es7000_plat == 1)
1067 return;
1068 #endif
1069
1070 /*
1071 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1072 */
1073 ioapic = mp_find_ioapic(0);
1074 if (ioapic < 0)
1075 return;
1076 dstapic = mp_ioapics[ioapic].apicid;
1077
1078 /*
1079 * Use the default configuration for the IRQs 0-15. Unless
1080 * overridden by (MADT) interrupt source override entries.
1081 */
1082 for (i = 0; i < 16; i++) {
1083 int idx;
1084
1085 for (idx = 0; idx < mp_irq_entries; idx++) {
1086 struct mpc_intsrc *irq = mp_irqs + idx;
1087
1088 /* Do we already have a mapping for this ISA IRQ? */
1089 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1090 break;
1091
1092 /* Do we already have a mapping for this IOAPIC pin */
1093 if (irq->dstapic == dstapic && irq->dstirq == i)
1094 break;
1095 }
1096
1097 if (idx != mp_irq_entries) {
1098 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1099 continue; /* IRQ already used */
1100 }
1101
1102 mp_irq.type = MP_INTSRC;
1103 mp_irq.irqflag = 0; /* Conforming */
1104 mp_irq.srcbus = MP_ISA_BUS;
1105 mp_irq.dstapic = dstapic;
1106 mp_irq.irqtype = mp_INT;
1107 mp_irq.srcbusirq = i; /* Identity mapped */
1108 mp_irq.dstirq = i;
1109
1110 save_mp_irq(&mp_irq);
1111 }
1112 }
1113
1114 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1115 {
1116 int ioapic;
1117 int ioapic_pin;
1118 #ifdef CONFIG_X86_32
1119 #define MAX_GSI_NUM 4096
1120 #define IRQ_COMPRESSION_START 64
1121
1122 static int pci_irq = IRQ_COMPRESSION_START;
1123 /*
1124 * Mapping between Global System Interrupts, which
1125 * represent all possible interrupts, and IRQs
1126 * assigned to actual devices.
1127 */
1128 static int gsi_to_irq[MAX_GSI_NUM];
1129 #else
1130
1131 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1132 return gsi;
1133 #endif
1134
1135 /* Don't set up the ACPI SCI because it's already set up */
1136 if (acpi_gbl_FADT.sci_interrupt == gsi)
1137 return gsi;
1138
1139 ioapic = mp_find_ioapic(gsi);
1140 if (ioapic < 0) {
1141 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1142 return gsi;
1143 }
1144
1145 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1146
1147 #ifdef CONFIG_X86_32
1148 if (ioapic_renumber_irq)
1149 gsi = ioapic_renumber_irq(ioapic, gsi);
1150 #endif
1151
1152 /*
1153 * Avoid pin reprogramming. PRTs typically include entries
1154 * with redundant pin->gsi mappings (but unique PCI devices);
1155 * we only program the IOAPIC on the first.
1156 */
1157 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1158 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1159 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1160 ioapic_pin);
1161 return gsi;
1162 }
1163 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1164 pr_debug("Pin %d-%d already programmed\n",
1165 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1166 #ifdef CONFIG_X86_32
1167 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1168 #else
1169 return gsi;
1170 #endif
1171 }
1172
1173 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1174 #ifdef CONFIG_X86_32
1175 /*
1176 * For GSI >= 64, use IRQ compression
1177 */
1178 if ((gsi >= IRQ_COMPRESSION_START)
1179 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1180 /*
1181 * For PCI devices assign IRQs in order, avoiding gaps
1182 * due to unused I/O APIC pins.
1183 */
1184 int irq = gsi;
1185 if (gsi < MAX_GSI_NUM) {
1186 /*
1187 * Retain the VIA chipset work-around (gsi > 15), but
1188 * avoid a problem where the 8254 timer (IRQ0) is setup
1189 * via an override (so it's not on pin 0 of the ioapic),
1190 * and at the same time, the pin 0 interrupt is a PCI
1191 * type. The gsi > 15 test could cause these two pins
1192 * to be shared as IRQ0, and they are not shareable.
1193 * So test for this condition, and if necessary, avoid
1194 * the pin collision.
1195 */
1196 gsi = pci_irq++;
1197 /*
1198 * Don't assign IRQ used by ACPI SCI
1199 */
1200 if (gsi == acpi_gbl_FADT.sci_interrupt)
1201 gsi = pci_irq++;
1202 gsi_to_irq[irq] = gsi;
1203 } else {
1204 printk(KERN_ERR "GSI %u is too high\n", gsi);
1205 return gsi;
1206 }
1207 }
1208 #endif
1209 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1210 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1211 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1212 return gsi;
1213 }
1214
1215 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1216 u32 gsi, int triggering, int polarity)
1217 {
1218 #ifdef CONFIG_X86_MPPARSE
1219 struct mpc_intsrc mp_irq;
1220 int ioapic;
1221
1222 if (!acpi_ioapic)
1223 return 0;
1224
1225 /* print the entry should happen on mptable identically */
1226 mp_irq.type = MP_INTSRC;
1227 mp_irq.irqtype = mp_INT;
1228 mp_irq.irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1229 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1230 mp_irq.srcbus = number;
1231 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1232 ioapic = mp_find_ioapic(gsi);
1233 mp_irq.dstapic = mp_ioapic_routing[ioapic].apic_id;
1234 mp_irq.dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1235
1236 save_mp_irq(&mp_irq);
1237 #endif
1238 return 0;
1239 }
1240
1241 /*
1242 * Parse IOAPIC related entries in MADT
1243 * returns 0 on success, < 0 on error
1244 */
1245 static int __init acpi_parse_madt_ioapic_entries(void)
1246 {
1247 int count;
1248
1249 /*
1250 * ACPI interpreter is required to complete interrupt setup,
1251 * so if it is off, don't enumerate the io-apics with ACPI.
1252 * If MPS is present, it will handle them,
1253 * otherwise the system will stay in PIC mode
1254 */
1255 if (acpi_disabled || acpi_noirq) {
1256 return -ENODEV;
1257 }
1258
1259 if (!cpu_has_apic)
1260 return -ENODEV;
1261
1262 /*
1263 * if "noapic" boot option, don't look for IO-APICs
1264 */
1265 if (skip_ioapic_setup) {
1266 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1267 "due to 'noapic' option.\n");
1268 return -ENODEV;
1269 }
1270
1271 count =
1272 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1273 MAX_IO_APICS);
1274 if (!count) {
1275 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1276 return -ENODEV;
1277 } else if (count < 0) {
1278 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1279 return count;
1280 }
1281
1282 count =
1283 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1284 nr_irqs);
1285 if (count < 0) {
1286 printk(KERN_ERR PREFIX
1287 "Error parsing interrupt source overrides entry\n");
1288 /* TBD: Cleanup to allow fallback to MPS */
1289 return count;
1290 }
1291
1292 /*
1293 * If BIOS did not supply an INT_SRC_OVR for the SCI
1294 * pretend we got one so we can set the SCI flags.
1295 */
1296 if (!acpi_sci_override_gsi)
1297 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1298
1299 /* Fill in identity legacy mapings where no override */
1300 mp_config_acpi_legacy_irqs();
1301
1302 count =
1303 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1304 nr_irqs);
1305 if (count < 0) {
1306 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1307 /* TBD: Cleanup to allow fallback to MPS */
1308 return count;
1309 }
1310
1311 return 0;
1312 }
1313 #else
1314 static inline int acpi_parse_madt_ioapic_entries(void)
1315 {
1316 return -1;
1317 }
1318 #endif /* !CONFIG_X86_IO_APIC */
1319
1320 static void __init early_acpi_process_madt(void)
1321 {
1322 #ifdef CONFIG_X86_LOCAL_APIC
1323 int error;
1324
1325 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1326
1327 /*
1328 * Parse MADT LAPIC entries
1329 */
1330 error = early_acpi_parse_madt_lapic_addr_ovr();
1331 if (!error) {
1332 acpi_lapic = 1;
1333 smp_found_config = 1;
1334 }
1335 if (error == -EINVAL) {
1336 /*
1337 * Dell Precision Workstation 410, 610 come here.
1338 */
1339 printk(KERN_ERR PREFIX
1340 "Invalid BIOS MADT, disabling ACPI\n");
1341 disable_acpi();
1342 }
1343 }
1344 #endif
1345 }
1346
1347 static void __init acpi_process_madt(void)
1348 {
1349 #ifdef CONFIG_X86_LOCAL_APIC
1350 int error;
1351
1352 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1353
1354 /*
1355 * Parse MADT LAPIC entries
1356 */
1357 error = acpi_parse_madt_lapic_entries();
1358 if (!error) {
1359 acpi_lapic = 1;
1360
1361 #ifdef CONFIG_X86_BIGSMP
1362 generic_bigsmp_probe();
1363 #endif
1364 /*
1365 * Parse MADT IO-APIC entries
1366 */
1367 error = acpi_parse_madt_ioapic_entries();
1368 if (!error) {
1369 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1370 acpi_ioapic = 1;
1371
1372 smp_found_config = 1;
1373 if (apic->setup_apic_routing)
1374 apic->setup_apic_routing();
1375 }
1376 }
1377 if (error == -EINVAL) {
1378 /*
1379 * Dell Precision Workstation 410, 610 come here.
1380 */
1381 printk(KERN_ERR PREFIX
1382 "Invalid BIOS MADT, disabling ACPI\n");
1383 disable_acpi();
1384 }
1385 } else {
1386 /*
1387 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1388 * In the event an MPS table was found, forget it.
1389 * Boot with "acpi=off" to use MPS on such a system.
1390 */
1391 if (smp_found_config) {
1392 printk(KERN_WARNING PREFIX
1393 "No APIC-table, disabling MPS\n");
1394 smp_found_config = 0;
1395 }
1396 }
1397
1398 /*
1399 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1400 * processors, where MPS only supports physical.
1401 */
1402 if (acpi_lapic && acpi_ioapic)
1403 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1404 "information\n");
1405 else if (acpi_lapic)
1406 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1407 "configuration information\n");
1408 #endif
1409 return;
1410 }
1411
1412 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1413 {
1414 if (!acpi_force) {
1415 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1416 d->ident);
1417 acpi_noirq_set();
1418 }
1419 return 0;
1420 }
1421
1422 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1423 {
1424 if (!acpi_force) {
1425 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1426 d->ident);
1427 acpi_disable_pci();
1428 }
1429 return 0;
1430 }
1431
1432 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1433 {
1434 if (!acpi_force) {
1435 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1436 disable_acpi();
1437 } else {
1438 printk(KERN_NOTICE
1439 "Warning: DMI blacklist says broken, but acpi forced\n");
1440 }
1441 return 0;
1442 }
1443
1444 /*
1445 * Limit ACPI to CPU enumeration for HT
1446 */
1447 static int __init force_acpi_ht(const struct dmi_system_id *d)
1448 {
1449 if (!acpi_force) {
1450 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1451 d->ident);
1452 disable_acpi();
1453 acpi_ht = 1;
1454 } else {
1455 printk(KERN_NOTICE
1456 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1457 }
1458 return 0;
1459 }
1460
1461 /*
1462 * Force ignoring BIOS IRQ0 pin2 override
1463 */
1464 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1465 {
1466 /*
1467 * The ati_ixp4x0_rev() early PCI quirk should have set
1468 * the acpi_skip_timer_override flag already:
1469 */
1470 if (!acpi_skip_timer_override) {
1471 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1472 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1473 d->ident);
1474 acpi_skip_timer_override = 1;
1475 }
1476 return 0;
1477 }
1478
1479 /*
1480 * If your system is blacklisted here, but you find that acpi=force
1481 * works for you, please contact acpi-devel@sourceforge.net
1482 */
1483 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1484 /*
1485 * Boxes that need ACPI disabled
1486 */
1487 {
1488 .callback = dmi_disable_acpi,
1489 .ident = "IBM Thinkpad",
1490 .matches = {
1491 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1492 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1493 },
1494 },
1495
1496 /*
1497 * Boxes that need acpi=ht
1498 */
1499 {
1500 .callback = force_acpi_ht,
1501 .ident = "FSC Primergy T850",
1502 .matches = {
1503 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1504 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1505 },
1506 },
1507 {
1508 .callback = force_acpi_ht,
1509 .ident = "HP VISUALIZE NT Workstation",
1510 .matches = {
1511 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1512 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1513 },
1514 },
1515 {
1516 .callback = force_acpi_ht,
1517 .ident = "Compaq Workstation W8000",
1518 .matches = {
1519 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1520 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1521 },
1522 },
1523 {
1524 .callback = force_acpi_ht,
1525 .ident = "ASUS P4B266",
1526 .matches = {
1527 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1528 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1529 },
1530 },
1531 {
1532 .callback = force_acpi_ht,
1533 .ident = "ASUS P2B-DS",
1534 .matches = {
1535 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1536 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1537 },
1538 },
1539 {
1540 .callback = force_acpi_ht,
1541 .ident = "ASUS CUR-DLS",
1542 .matches = {
1543 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1544 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1545 },
1546 },
1547 {
1548 .callback = force_acpi_ht,
1549 .ident = "ABIT i440BX-W83977",
1550 .matches = {
1551 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1552 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1553 },
1554 },
1555 {
1556 .callback = force_acpi_ht,
1557 .ident = "IBM Bladecenter",
1558 .matches = {
1559 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1560 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1561 },
1562 },
1563 {
1564 .callback = force_acpi_ht,
1565 .ident = "IBM eServer xSeries 360",
1566 .matches = {
1567 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1568 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1569 },
1570 },
1571 {
1572 .callback = force_acpi_ht,
1573 .ident = "IBM eserver xSeries 330",
1574 .matches = {
1575 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1576 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1577 },
1578 },
1579 {
1580 .callback = force_acpi_ht,
1581 .ident = "IBM eserver xSeries 440",
1582 .matches = {
1583 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1584 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1585 },
1586 },
1587
1588 /*
1589 * Boxes that need ACPI PCI IRQ routing disabled
1590 */
1591 {
1592 .callback = disable_acpi_irq,
1593 .ident = "ASUS A7V",
1594 .matches = {
1595 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1596 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1597 /* newer BIOS, Revision 1011, does work */
1598 DMI_MATCH(DMI_BIOS_VERSION,
1599 "ASUS A7V ACPI BIOS Revision 1007"),
1600 },
1601 },
1602 {
1603 /*
1604 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1605 * for LPC bridge, which is needed for the PCI
1606 * interrupt links to work. DSDT fix is in bug 5966.
1607 * 2645, 2646 model numbers are shared with 600/600E/600X
1608 */
1609 .callback = disable_acpi_irq,
1610 .ident = "IBM Thinkpad 600 Series 2645",
1611 .matches = {
1612 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1613 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1614 },
1615 },
1616 {
1617 .callback = disable_acpi_irq,
1618 .ident = "IBM Thinkpad 600 Series 2646",
1619 .matches = {
1620 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1621 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1622 },
1623 },
1624 /*
1625 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1626 */
1627 { /* _BBN 0 bug */
1628 .callback = disable_acpi_pci,
1629 .ident = "ASUS PR-DLS",
1630 .matches = {
1631 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1632 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1633 DMI_MATCH(DMI_BIOS_VERSION,
1634 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1635 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1636 },
1637 },
1638 {
1639 .callback = disable_acpi_pci,
1640 .ident = "Acer TravelMate 36x Laptop",
1641 .matches = {
1642 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1643 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1644 },
1645 },
1646 {}
1647 };
1648
1649 /* second table for DMI checks that should run after early-quirks */
1650 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1651 /*
1652 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1653 * which includes some code which overrides all temperature
1654 * trip points to 16C if the INTIN2 input of the I/O APIC
1655 * is enabled. This input is incorrectly designated the
1656 * ISA IRQ 0 via an interrupt source override even though
1657 * it is wired to the output of the master 8259A and INTIN0
1658 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1659 * override in that cases.
1660 */
1661 {
1662 .callback = dmi_ignore_irq0_timer_override,
1663 .ident = "HP nx6115 laptop",
1664 .matches = {
1665 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1666 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1667 },
1668 },
1669 {
1670 .callback = dmi_ignore_irq0_timer_override,
1671 .ident = "HP NX6125 laptop",
1672 .matches = {
1673 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1674 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1675 },
1676 },
1677 {
1678 .callback = dmi_ignore_irq0_timer_override,
1679 .ident = "HP NX6325 laptop",
1680 .matches = {
1681 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1682 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1683 },
1684 },
1685 {
1686 .callback = dmi_ignore_irq0_timer_override,
1687 .ident = "HP 6715b laptop",
1688 .matches = {
1689 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1690 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1691 },
1692 },
1693 {}
1694 };
1695
1696 /*
1697 * acpi_boot_table_init() and acpi_boot_init()
1698 * called from setup_arch(), always.
1699 * 1. checksums all tables
1700 * 2. enumerates lapics
1701 * 3. enumerates io-apics
1702 *
1703 * acpi_table_init() is separate to allow reading SRAT without
1704 * other side effects.
1705 *
1706 * side effects of acpi_boot_init:
1707 * acpi_lapic = 1 if LAPIC found
1708 * acpi_ioapic = 1 if IOAPIC found
1709 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1710 * if acpi_blacklisted() acpi_disabled = 1;
1711 * acpi_irq_model=...
1712 * ...
1713 *
1714 * return value: (currently ignored)
1715 * 0: success
1716 * !0: failure
1717 */
1718
1719 int __init acpi_boot_table_init(void)
1720 {
1721 int error;
1722
1723 dmi_check_system(acpi_dmi_table);
1724
1725 /*
1726 * If acpi_disabled, bail out
1727 * One exception: acpi=ht continues far enough to enumerate LAPICs
1728 */
1729 if (acpi_disabled && !acpi_ht)
1730 return 1;
1731
1732 /*
1733 * Initialize the ACPI boot-time table parser.
1734 */
1735 error = acpi_table_init();
1736 if (error) {
1737 disable_acpi();
1738 return error;
1739 }
1740
1741 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1742
1743 /*
1744 * blacklist may disable ACPI entirely
1745 */
1746 error = acpi_blacklisted();
1747 if (error) {
1748 if (acpi_force) {
1749 printk(KERN_WARNING PREFIX "acpi=force override\n");
1750 } else {
1751 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1752 disable_acpi();
1753 return error;
1754 }
1755 }
1756
1757 return 0;
1758 }
1759
1760 int __init early_acpi_boot_init(void)
1761 {
1762 /*
1763 * If acpi_disabled, bail out
1764 * One exception: acpi=ht continues far enough to enumerate LAPICs
1765 */
1766 if (acpi_disabled && !acpi_ht)
1767 return 1;
1768
1769 /*
1770 * Process the Multiple APIC Description Table (MADT), if present
1771 */
1772 early_acpi_process_madt();
1773
1774 return 0;
1775 }
1776
1777 int __init acpi_boot_init(void)
1778 {
1779 /* those are executed after early-quirks are executed */
1780 dmi_check_system(acpi_dmi_table_late);
1781
1782 /*
1783 * If acpi_disabled, bail out
1784 * One exception: acpi=ht continues far enough to enumerate LAPICs
1785 */
1786 if (acpi_disabled && !acpi_ht)
1787 return 1;
1788
1789 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1790
1791 /*
1792 * set sci_int and PM timer address
1793 */
1794 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1795
1796 /*
1797 * Process the Multiple APIC Description Table (MADT), if present
1798 */
1799 acpi_process_madt();
1800
1801 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1802
1803 return 0;
1804 }
1805
1806 static int __init parse_acpi(char *arg)
1807 {
1808 if (!arg)
1809 return -EINVAL;
1810
1811 /* "acpi=off" disables both ACPI table parsing and interpreter */
1812 if (strcmp(arg, "off") == 0) {
1813 disable_acpi();
1814 }
1815 /* acpi=force to over-ride black-list */
1816 else if (strcmp(arg, "force") == 0) {
1817 acpi_force = 1;
1818 acpi_ht = 1;
1819 acpi_disabled = 0;
1820 }
1821 /* acpi=strict disables out-of-spec workarounds */
1822 else if (strcmp(arg, "strict") == 0) {
1823 acpi_strict = 1;
1824 }
1825 /* Limit ACPI just to boot-time to enable HT */
1826 else if (strcmp(arg, "ht") == 0) {
1827 if (!acpi_force)
1828 disable_acpi();
1829 acpi_ht = 1;
1830 }
1831 /* acpi=rsdt use RSDT instead of XSDT */
1832 else if (strcmp(arg, "rsdt") == 0) {
1833 acpi_rsdt_forced = 1;
1834 }
1835 /* "acpi=noirq" disables ACPI interrupt routing */
1836 else if (strcmp(arg, "noirq") == 0) {
1837 acpi_noirq_set();
1838 } else {
1839 /* Core will printk when we return error. */
1840 return -EINVAL;
1841 }
1842 return 0;
1843 }
1844 early_param("acpi", parse_acpi);
1845
1846 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1847 static int __init parse_pci(char *arg)
1848 {
1849 if (arg && strcmp(arg, "noacpi") == 0)
1850 acpi_disable_pci();
1851 return 0;
1852 }
1853 early_param("pci", parse_pci);
1854
1855 int __init acpi_mps_check(void)
1856 {
1857 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1858 /* mptable code is not built-in*/
1859 if (acpi_disabled || acpi_noirq) {
1860 printk(KERN_WARNING "MPS support code is not built-in.\n"
1861 "Using acpi=off or acpi=noirq or pci=noacpi "
1862 "may have problem\n");
1863 return 1;
1864 }
1865 #endif
1866 return 0;
1867 }
1868
1869 #ifdef CONFIG_X86_IO_APIC
1870 static int __init parse_acpi_skip_timer_override(char *arg)
1871 {
1872 acpi_skip_timer_override = 1;
1873 return 0;
1874 }
1875 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1876
1877 static int __init parse_acpi_use_timer_override(char *arg)
1878 {
1879 acpi_use_timer_override = 1;
1880 return 0;
1881 }
1882 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1883 #endif /* CONFIG_X86_IO_APIC */
1884
1885 static int __init setup_acpi_sci(char *s)
1886 {
1887 if (!s)
1888 return -EINVAL;
1889 if (!strcmp(s, "edge"))
1890 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1891 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1892 else if (!strcmp(s, "level"))
1893 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1894 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1895 else if (!strcmp(s, "high"))
1896 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1897 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1898 else if (!strcmp(s, "low"))
1899 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1900 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1901 else
1902 return -EINVAL;
1903 return 0;
1904 }
1905 early_param("acpi_sci", setup_acpi_sci);
1906
1907 int __acpi_acquire_global_lock(unsigned int *lock)
1908 {
1909 unsigned int old, new, val;
1910 do {
1911 old = *lock;
1912 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1913 val = cmpxchg(lock, old, new);
1914 } while (unlikely (val != old));
1915 return (new < 3) ? -1 : 0;
1916 }
1917
1918 int __acpi_release_global_lock(unsigned int *lock)
1919 {
1920 unsigned int old, new, val;
1921 do {
1922 old = *lock;
1923 new = old & ~0x3;
1924 val = cmpxchg(lock, old, new);
1925 } while (unlikely (val != old));
1926 return old & 0x1;
1927 }
linux 2.6 git repository for openrd