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Merge commit '63cc8c75156462d4b42cbdd76c293b7eee7ddbfe':
[deliverable/linux.git] / arch / x86 / kernel / acpi / boot.c
1 /*
2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26 #include <linux/init.h>
27 #include <linux/acpi.h>
28 #include <linux/acpi_pmtmr.h>
29 #include <linux/efi.h>
30 #include <linux/cpumask.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33 #include <linux/irq.h>
34 #include <linux/bootmem.h>
35 #include <linux/ioport.h>
36
37 #include <asm/pgtable.h>
38 #include <asm/io_apic.h>
39 #include <asm/apic.h>
40 #include <asm/genapic.h>
41 #include <asm/io.h>
42 #include <asm/mpspec.h>
43 #include <asm/smp.h>
44
45 #ifdef CONFIG_X86_LOCAL_APIC
46 # include <mach_apic.h>
47 #endif
48
49 static int __initdata acpi_force = 0;
50
51 #ifdef CONFIG_ACPI
52 int acpi_disabled = 0;
53 #else
54 int acpi_disabled = 1;
55 #endif
56 EXPORT_SYMBOL(acpi_disabled);
57
58 #ifdef CONFIG_X86_64
59
60 #include <asm/proto.h>
61 #include <asm/genapic.h>
62
63 #else /* X86 */
64
65 #ifdef CONFIG_X86_LOCAL_APIC
66 #include <mach_apic.h>
67 #include <mach_mpparse.h>
68 #endif /* CONFIG_X86_LOCAL_APIC */
69
70 #endif /* X86 */
71
72 #define BAD_MADT_ENTRY(entry, end) ( \
73 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
74 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
75
76 #define PREFIX "ACPI: "
77
78 int acpi_noirq; /* skip ACPI IRQ initialization */
79 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
80 EXPORT_SYMBOL(acpi_pci_disabled);
81 int acpi_ht __initdata = 1; /* enable HT */
82
83 int acpi_lapic;
84 int acpi_ioapic;
85 int acpi_strict;
86
87 u8 acpi_sci_flags __initdata;
88 int acpi_sci_override_gsi __initdata;
89 int acpi_skip_timer_override __initdata;
90 int acpi_use_timer_override __initdata;
91
92 #ifdef CONFIG_X86_LOCAL_APIC
93 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
94 #endif
95
96 #ifndef __HAVE_ARCH_CMPXCHG
97 #warning ACPI uses CMPXCHG, i486 and later hardware
98 #endif
99
100 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
101
102 /* --------------------------------------------------------------------------
103 Boot-time Configuration
104 -------------------------------------------------------------------------- */
105
106 /*
107 * The default interrupt routing model is PIC (8259). This gets
108 * overridden if IOAPICs are enumerated (below).
109 */
110 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
111
112
113 /*
114 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
115 * to map the target physical address. The problem is that set_fixmap()
116 * provides a single page, and it is possible that the page is not
117 * sufficient.
118 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
119 * i.e. until the next __va_range() call.
120 *
121 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
122 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
123 * count idx down while incrementing the phys address.
124 */
125 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
126 {
127 unsigned long base, offset, mapped_size;
128 int idx;
129
130 if (!phys || !size)
131 return NULL;
132
133 if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
134 return __va(phys);
135
136 offset = phys & (PAGE_SIZE - 1);
137 mapped_size = PAGE_SIZE - offset;
138 clear_fixmap(FIX_ACPI_END);
139 set_fixmap(FIX_ACPI_END, phys);
140 base = fix_to_virt(FIX_ACPI_END);
141
142 /*
143 * Most cases can be covered by the below.
144 */
145 idx = FIX_ACPI_END;
146 while (mapped_size < size) {
147 if (--idx < FIX_ACPI_BEGIN)
148 return NULL; /* cannot handle this */
149 phys += PAGE_SIZE;
150 clear_fixmap(idx);
151 set_fixmap(idx, phys);
152 mapped_size += PAGE_SIZE;
153 }
154
155 return ((unsigned char *)base + offset);
156 }
157
158 #ifdef CONFIG_PCI_MMCONFIG
159 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
160 struct acpi_mcfg_allocation *pci_mmcfg_config;
161 int pci_mmcfg_config_num;
162
163 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
164 {
165 if (!strcmp(mcfg->header.oem_id, "SGI"))
166 acpi_mcfg_64bit_base_addr = TRUE;
167
168 return 0;
169 }
170
171 int __init acpi_parse_mcfg(struct acpi_table_header *header)
172 {
173 struct acpi_table_mcfg *mcfg;
174 unsigned long i;
175 int config_size;
176
177 if (!header)
178 return -EINVAL;
179
180 mcfg = (struct acpi_table_mcfg *)header;
181
182 /* how many config structures do we have */
183 pci_mmcfg_config_num = 0;
184 i = header->length - sizeof(struct acpi_table_mcfg);
185 while (i >= sizeof(struct acpi_mcfg_allocation)) {
186 ++pci_mmcfg_config_num;
187 i -= sizeof(struct acpi_mcfg_allocation);
188 };
189 if (pci_mmcfg_config_num == 0) {
190 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
191 return -ENODEV;
192 }
193
194 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
195 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
196 if (!pci_mmcfg_config) {
197 printk(KERN_WARNING PREFIX
198 "No memory for MCFG config tables\n");
199 return -ENOMEM;
200 }
201
202 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
203
204 acpi_mcfg_oem_check(mcfg);
205
206 for (i = 0; i < pci_mmcfg_config_num; ++i) {
207 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
208 !acpi_mcfg_64bit_base_addr) {
209 printk(KERN_ERR PREFIX
210 "MMCONFIG not in low 4GB of memory\n");
211 kfree(pci_mmcfg_config);
212 pci_mmcfg_config_num = 0;
213 return -ENODEV;
214 }
215 }
216
217 return 0;
218 }
219 #endif /* CONFIG_PCI_MMCONFIG */
220
221 #ifdef CONFIG_X86_LOCAL_APIC
222 static int __init acpi_parse_madt(struct acpi_table_header *table)
223 {
224 struct acpi_table_madt *madt = NULL;
225
226 if (!cpu_has_apic)
227 return -EINVAL;
228
229 madt = (struct acpi_table_madt *)table;
230 if (!madt) {
231 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
232 return -ENODEV;
233 }
234
235 if (madt->address) {
236 acpi_lapic_addr = (u64) madt->address;
237
238 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
239 madt->address);
240 }
241
242 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
243
244 return 0;
245 }
246
247 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
248 {
249 unsigned int ver = 0;
250
251 if (!enabled) {
252 ++disabled_cpus;
253 return;
254 }
255
256 #ifdef CONFIG_X86_32
257 if (boot_cpu_physical_apicid != -1U)
258 ver = apic_version[boot_cpu_physical_apicid];
259 #endif
260
261 generic_processor_info(id, ver);
262 }
263
264 static int __init
265 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
266 {
267 struct acpi_madt_local_apic *processor = NULL;
268
269 processor = (struct acpi_madt_local_apic *)header;
270
271 if (BAD_MADT_ENTRY(processor, end))
272 return -EINVAL;
273
274 acpi_table_print_madt_entry(header);
275
276 /*
277 * We need to register disabled CPU as well to permit
278 * counting disabled CPUs. This allows us to size
279 * cpus_possible_map more accurately, to permit
280 * to not preallocating memory for all NR_CPUS
281 * when we use CPU hotplug.
282 */
283 acpi_register_lapic(processor->id, /* APIC ID */
284 processor->lapic_flags & ACPI_MADT_ENABLED);
285
286 return 0;
287 }
288
289 static int __init
290 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
291 {
292 struct acpi_madt_local_sapic *processor = NULL;
293
294 processor = (struct acpi_madt_local_sapic *)header;
295
296 if (BAD_MADT_ENTRY(processor, end))
297 return -EINVAL;
298
299 acpi_table_print_madt_entry(header);
300
301 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
302 processor->lapic_flags & ACPI_MADT_ENABLED);
303
304 return 0;
305 }
306
307 static int __init
308 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
309 const unsigned long end)
310 {
311 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
312
313 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
314
315 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
316 return -EINVAL;
317
318 acpi_lapic_addr = lapic_addr_ovr->address;
319
320 return 0;
321 }
322
323 static int __init
324 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
325 {
326 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
327
328 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
329
330 if (BAD_MADT_ENTRY(lapic_nmi, end))
331 return -EINVAL;
332
333 acpi_table_print_madt_entry(header);
334
335 if (lapic_nmi->lint != 1)
336 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
337
338 return 0;
339 }
340
341 #endif /*CONFIG_X86_LOCAL_APIC */
342
343 #ifdef CONFIG_X86_IO_APIC
344
345 static int __init
346 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
347 {
348 struct acpi_madt_io_apic *ioapic = NULL;
349
350 ioapic = (struct acpi_madt_io_apic *)header;
351
352 if (BAD_MADT_ENTRY(ioapic, end))
353 return -EINVAL;
354
355 acpi_table_print_madt_entry(header);
356
357 mp_register_ioapic(ioapic->id,
358 ioapic->address, ioapic->global_irq_base);
359
360 return 0;
361 }
362
363 /*
364 * Parse Interrupt Source Override for the ACPI SCI
365 */
366 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
367 {
368 if (trigger == 0) /* compatible SCI trigger is level */
369 trigger = 3;
370
371 if (polarity == 0) /* compatible SCI polarity is low */
372 polarity = 3;
373
374 /* Command-line over-ride via acpi_sci= */
375 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
376 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
377
378 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
379 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
380
381 /*
382 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
383 * If GSI is < 16, this will update its flags,
384 * else it will create a new mp_irqs[] entry.
385 */
386 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
387
388 /*
389 * stash over-ride to indicate we've been here
390 * and for later update of acpi_gbl_FADT
391 */
392 acpi_sci_override_gsi = gsi;
393 return;
394 }
395
396 static int __init
397 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
398 const unsigned long end)
399 {
400 struct acpi_madt_interrupt_override *intsrc = NULL;
401
402 intsrc = (struct acpi_madt_interrupt_override *)header;
403
404 if (BAD_MADT_ENTRY(intsrc, end))
405 return -EINVAL;
406
407 acpi_table_print_madt_entry(header);
408
409 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
410 acpi_sci_ioapic_setup(intsrc->global_irq,
411 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
412 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
413 return 0;
414 }
415
416 if (acpi_skip_timer_override &&
417 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
418 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
419 return 0;
420 }
421
422 mp_override_legacy_irq(intsrc->source_irq,
423 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
424 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
425 intsrc->global_irq);
426
427 return 0;
428 }
429
430 static int __init
431 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
432 {
433 struct acpi_madt_nmi_source *nmi_src = NULL;
434
435 nmi_src = (struct acpi_madt_nmi_source *)header;
436
437 if (BAD_MADT_ENTRY(nmi_src, end))
438 return -EINVAL;
439
440 acpi_table_print_madt_entry(header);
441
442 /* TBD: Support nimsrc entries? */
443
444 return 0;
445 }
446
447 #endif /* CONFIG_X86_IO_APIC */
448
449 /*
450 * acpi_pic_sci_set_trigger()
451 *
452 * use ELCR to set PIC-mode trigger type for SCI
453 *
454 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
455 * it may require Edge Trigger -- use "acpi_sci=edge"
456 *
457 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
458 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
459 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
460 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
461 */
462
463 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
464 {
465 unsigned int mask = 1 << irq;
466 unsigned int old, new;
467
468 /* Real old ELCR mask */
469 old = inb(0x4d0) | (inb(0x4d1) << 8);
470
471 /*
472 * If we use ACPI to set PCI IRQs, then we should clear ELCR
473 * since we will set it correctly as we enable the PCI irq
474 * routing.
475 */
476 new = acpi_noirq ? old : 0;
477
478 /*
479 * Update SCI information in the ELCR, it isn't in the PCI
480 * routing tables..
481 */
482 switch (trigger) {
483 case 1: /* Edge - clear */
484 new &= ~mask;
485 break;
486 case 3: /* Level - set */
487 new |= mask;
488 break;
489 }
490
491 if (old == new)
492 return;
493
494 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
495 outb(new, 0x4d0);
496 outb(new >> 8, 0x4d1);
497 }
498
499 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
500 {
501 *irq = gsi;
502 return 0;
503 }
504
505 /*
506 * success: return IRQ number (>=0)
507 * failure: return < 0
508 */
509 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
510 {
511 unsigned int irq;
512 unsigned int plat_gsi = gsi;
513
514 #ifdef CONFIG_PCI
515 /*
516 * Make sure all (legacy) PCI IRQs are set as level-triggered.
517 */
518 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
519 if (triggering == ACPI_LEVEL_SENSITIVE)
520 eisa_set_level_irq(gsi);
521 }
522 #endif
523
524 #ifdef CONFIG_X86_IO_APIC
525 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
526 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
527 }
528 #endif
529 acpi_gsi_to_irq(plat_gsi, &irq);
530 return irq;
531 }
532
533 /*
534 * ACPI based hotplug support for CPU
535 */
536 #ifdef CONFIG_ACPI_HOTPLUG_CPU
537
538 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
539 {
540 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
541 union acpi_object *obj;
542 struct acpi_madt_local_apic *lapic;
543 cpumask_t tmp_map, new_map;
544 u8 physid;
545 int cpu;
546
547 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
548 return -EINVAL;
549
550 if (!buffer.length || !buffer.pointer)
551 return -EINVAL;
552
553 obj = buffer.pointer;
554 if (obj->type != ACPI_TYPE_BUFFER ||
555 obj->buffer.length < sizeof(*lapic)) {
556 kfree(buffer.pointer);
557 return -EINVAL;
558 }
559
560 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
561
562 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
563 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
564 kfree(buffer.pointer);
565 return -EINVAL;
566 }
567
568 physid = lapic->id;
569
570 kfree(buffer.pointer);
571 buffer.length = ACPI_ALLOCATE_BUFFER;
572 buffer.pointer = NULL;
573
574 tmp_map = cpu_present_map;
575 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
576
577 /*
578 * If mp_register_lapic successfully generates a new logical cpu
579 * number, then the following will get us exactly what was mapped
580 */
581 cpus_andnot(new_map, cpu_present_map, tmp_map);
582 if (cpus_empty(new_map)) {
583 printk ("Unable to map lapic to logical cpu number\n");
584 return -EINVAL;
585 }
586
587 cpu = first_cpu(new_map);
588
589 *pcpu = cpu;
590 return 0;
591 }
592
593 /* wrapper to silence section mismatch warning */
594 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
595 {
596 return _acpi_map_lsapic(handle, pcpu);
597 }
598 EXPORT_SYMBOL(acpi_map_lsapic);
599
600 int acpi_unmap_lsapic(int cpu)
601 {
602 per_cpu(x86_cpu_to_apicid, cpu) = -1;
603 cpu_clear(cpu, cpu_present_map);
604 num_processors--;
605
606 return (0);
607 }
608
609 EXPORT_SYMBOL(acpi_unmap_lsapic);
610 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
611
612 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
613 {
614 /* TBD */
615 return -EINVAL;
616 }
617
618 EXPORT_SYMBOL(acpi_register_ioapic);
619
620 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
621 {
622 /* TBD */
623 return -EINVAL;
624 }
625
626 EXPORT_SYMBOL(acpi_unregister_ioapic);
627
628 static int __init acpi_parse_sbf(struct acpi_table_header *table)
629 {
630 struct acpi_table_boot *sb;
631
632 sb = (struct acpi_table_boot *)table;
633 if (!sb) {
634 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
635 return -ENODEV;
636 }
637
638 sbf_port = sb->cmos_index; /* Save CMOS port */
639
640 return 0;
641 }
642
643 #ifdef CONFIG_HPET_TIMER
644 #include <asm/hpet.h>
645
646 static struct __initdata resource *hpet_res;
647
648 static int __init acpi_parse_hpet(struct acpi_table_header *table)
649 {
650 struct acpi_table_hpet *hpet_tbl;
651
652 hpet_tbl = (struct acpi_table_hpet *)table;
653 if (!hpet_tbl) {
654 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
655 return -ENODEV;
656 }
657
658 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
659 printk(KERN_WARNING PREFIX "HPET timers must be located in "
660 "memory.\n");
661 return -1;
662 }
663
664 hpet_address = hpet_tbl->address.address;
665
666 /*
667 * Some broken BIOSes advertise HPET at 0x0. We really do not
668 * want to allocate a resource there.
669 */
670 if (!hpet_address) {
671 printk(KERN_WARNING PREFIX
672 "HPET id: %#x base: %#lx is invalid\n",
673 hpet_tbl->id, hpet_address);
674 return 0;
675 }
676 #ifdef CONFIG_X86_64
677 /*
678 * Some even more broken BIOSes advertise HPET at
679 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
680 * some noise:
681 */
682 if (hpet_address == 0xfed0000000000000UL) {
683 if (!hpet_force_user) {
684 printk(KERN_WARNING PREFIX "HPET id: %#x "
685 "base: 0xfed0000000000000 is bogus\n "
686 "try hpet=force on the kernel command line to "
687 "fix it up to 0xfed00000.\n", hpet_tbl->id);
688 hpet_address = 0;
689 return 0;
690 }
691 printk(KERN_WARNING PREFIX
692 "HPET id: %#x base: 0xfed0000000000000 fixed up "
693 "to 0xfed00000.\n", hpet_tbl->id);
694 hpet_address >>= 32;
695 }
696 #endif
697 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
698 hpet_tbl->id, hpet_address);
699
700 /*
701 * Allocate and initialize the HPET firmware resource for adding into
702 * the resource tree during the lateinit timeframe.
703 */
704 #define HPET_RESOURCE_NAME_SIZE 9
705 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
706
707 hpet_res->name = (void *)&hpet_res[1];
708 hpet_res->flags = IORESOURCE_MEM;
709 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
710 hpet_tbl->sequence);
711
712 hpet_res->start = hpet_address;
713 hpet_res->end = hpet_address + (1 * 1024) - 1;
714
715 return 0;
716 }
717
718 /*
719 * hpet_insert_resource inserts the HPET resources used into the resource
720 * tree.
721 */
722 static __init int hpet_insert_resource(void)
723 {
724 if (!hpet_res)
725 return 1;
726
727 return insert_resource(&iomem_resource, hpet_res);
728 }
729
730 late_initcall(hpet_insert_resource);
731
732 #else
733 #define acpi_parse_hpet NULL
734 #endif
735
736 static int __init acpi_parse_fadt(struct acpi_table_header *table)
737 {
738
739 #ifdef CONFIG_X86_PM_TIMER
740 /* detect the location of the ACPI PM Timer */
741 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
742 /* FADT rev. 2 */
743 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
744 ACPI_ADR_SPACE_SYSTEM_IO)
745 return 0;
746
747 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
748 /*
749 * "X" fields are optional extensions to the original V1.0
750 * fields, so we must selectively expand V1.0 fields if the
751 * corresponding X field is zero.
752 */
753 if (!pmtmr_ioport)
754 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
755 } else {
756 /* FADT rev. 1 */
757 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
758 }
759 if (pmtmr_ioport)
760 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
761 pmtmr_ioport);
762 #endif
763 return 0;
764 }
765
766 #ifdef CONFIG_X86_LOCAL_APIC
767 /*
768 * Parse LAPIC entries in MADT
769 * returns 0 on success, < 0 on error
770 */
771
772 static void __init acpi_register_lapic_address(unsigned long address)
773 {
774 mp_lapic_addr = address;
775
776 set_fixmap_nocache(FIX_APIC_BASE, address);
777 if (boot_cpu_physical_apicid == -1U) {
778 boot_cpu_physical_apicid = read_apic_id();
779 #ifdef CONFIG_X86_32
780 apic_version[boot_cpu_physical_apicid] =
781 GET_APIC_VERSION(apic_read(APIC_LVR));
782 #endif
783 }
784 }
785
786 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
787 {
788 int count;
789
790 if (!cpu_has_apic)
791 return -ENODEV;
792
793 /*
794 * Note that the LAPIC address is obtained from the MADT (32-bit value)
795 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
796 */
797
798 count =
799 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
800 acpi_parse_lapic_addr_ovr, 0);
801 if (count < 0) {
802 printk(KERN_ERR PREFIX
803 "Error parsing LAPIC address override entry\n");
804 return count;
805 }
806
807 acpi_register_lapic_address(acpi_lapic_addr);
808
809 return count;
810 }
811
812 static int __init acpi_parse_madt_lapic_entries(void)
813 {
814 int count;
815
816 if (!cpu_has_apic)
817 return -ENODEV;
818
819 /*
820 * Note that the LAPIC address is obtained from the MADT (32-bit value)
821 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
822 */
823
824 count =
825 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
826 acpi_parse_lapic_addr_ovr, 0);
827 if (count < 0) {
828 printk(KERN_ERR PREFIX
829 "Error parsing LAPIC address override entry\n");
830 return count;
831 }
832
833 acpi_register_lapic_address(acpi_lapic_addr);
834
835 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
836 acpi_parse_sapic, MAX_APICS);
837
838 if (!count)
839 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
840 acpi_parse_lapic, MAX_APICS);
841 if (!count) {
842 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
843 /* TBD: Cleanup to allow fallback to MPS */
844 return -ENODEV;
845 } else if (count < 0) {
846 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
847 /* TBD: Cleanup to allow fallback to MPS */
848 return count;
849 }
850
851 count =
852 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
853 if (count < 0) {
854 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
855 /* TBD: Cleanup to allow fallback to MPS */
856 return count;
857 }
858 return 0;
859 }
860 #endif /* CONFIG_X86_LOCAL_APIC */
861
862 #ifdef CONFIG_X86_IO_APIC
863 #define MP_ISA_BUS 0
864
865 #ifdef CONFIG_X86_ES7000
866 extern int es7000_plat;
867 #endif
868
869 static struct {
870 int apic_id;
871 int gsi_base;
872 int gsi_end;
873 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
874 } mp_ioapic_routing[MAX_IO_APICS];
875
876 static int mp_find_ioapic(int gsi)
877 {
878 int i = 0;
879
880 /* Find the IOAPIC that manages this GSI. */
881 for (i = 0; i < nr_ioapics; i++) {
882 if ((gsi >= mp_ioapic_routing[i].gsi_base)
883 && (gsi <= mp_ioapic_routing[i].gsi_end))
884 return i;
885 }
886
887 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
888 return -1;
889 }
890
891 static u8 __init uniq_ioapic_id(u8 id)
892 {
893 #ifdef CONFIG_X86_32
894 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
895 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
896 return io_apic_get_unique_id(nr_ioapics, id);
897 else
898 return id;
899 #else
900 int i;
901 DECLARE_BITMAP(used, 256);
902 bitmap_zero(used, 256);
903 for (i = 0; i < nr_ioapics; i++) {
904 struct mp_config_ioapic *ia = &mp_ioapics[i];
905 __set_bit(ia->mp_apicid, used);
906 }
907 if (!test_bit(id, used))
908 return id;
909 return find_first_zero_bit(used, 256);
910 #endif
911 }
912
913 static int bad_ioapic(unsigned long address)
914 {
915 if (nr_ioapics >= MAX_IO_APICS) {
916 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
917 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
918 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
919 }
920 if (!address) {
921 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
922 " found in table, skipping!\n");
923 return 1;
924 }
925 return 0;
926 }
927
928 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
929 {
930 int idx = 0;
931
932 if (bad_ioapic(address))
933 return;
934
935 idx = nr_ioapics;
936
937 mp_ioapics[idx].mp_type = MP_IOAPIC;
938 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
939 mp_ioapics[idx].mp_apicaddr = address;
940
941 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
942 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
943 #ifdef CONFIG_X86_32
944 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
945 #else
946 mp_ioapics[idx].mp_apicver = 0;
947 #endif
948 /*
949 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
950 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
951 */
952 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
953 mp_ioapic_routing[idx].gsi_base = gsi_base;
954 mp_ioapic_routing[idx].gsi_end = gsi_base +
955 io_apic_get_redir_entries(idx);
956
957 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
958 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
959 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
960 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
961
962 nr_ioapics++;
963 }
964
965 static void assign_to_mp_irq(struct mp_config_intsrc *m,
966 struct mp_config_intsrc *mp_irq)
967 {
968 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
969 }
970
971 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
972 struct mp_config_intsrc *m)
973 {
974 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
975 }
976
977 static void save_mp_irq(struct mp_config_intsrc *m)
978 {
979 int i;
980
981 for (i = 0; i < mp_irq_entries; i++) {
982 if (!mp_irq_cmp(&mp_irqs[i], m))
983 return;
984 }
985
986 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
987 if (++mp_irq_entries == MAX_IRQ_SOURCES)
988 panic("Max # of irq sources exceeded!!\n");
989 }
990
991 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
992 {
993 int ioapic;
994 int pin;
995 struct mp_config_intsrc mp_irq;
996
997 /*
998 * Convert 'gsi' to 'ioapic.pin'.
999 */
1000 ioapic = mp_find_ioapic(gsi);
1001 if (ioapic < 0)
1002 return;
1003 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1004
1005 /*
1006 * TBD: This check is for faulty timer entries, where the override
1007 * erroneously sets the trigger to level, resulting in a HUGE
1008 * increase of timer interrupts!
1009 */
1010 if ((bus_irq == 0) && (trigger == 3))
1011 trigger = 1;
1012
1013 mp_irq.mp_type = MP_INTSRC;
1014 mp_irq.mp_irqtype = mp_INT;
1015 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1016 mp_irq.mp_srcbus = MP_ISA_BUS;
1017 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1018 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1019 mp_irq.mp_dstirq = pin; /* INTIN# */
1020
1021 save_mp_irq(&mp_irq);
1022 }
1023
1024 void __init mp_config_acpi_legacy_irqs(void)
1025 {
1026 int i;
1027 int ioapic;
1028 unsigned int dstapic;
1029 struct mp_config_intsrc mp_irq;
1030
1031 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1032 /*
1033 * Fabricate the legacy ISA bus (bus #31).
1034 */
1035 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1036 #endif
1037 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1038 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1039
1040 #ifdef CONFIG_X86_ES7000
1041 /*
1042 * Older generations of ES7000 have no legacy identity mappings
1043 */
1044 if (es7000_plat == 1)
1045 return;
1046 #endif
1047
1048 /*
1049 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1050 */
1051 ioapic = mp_find_ioapic(0);
1052 if (ioapic < 0)
1053 return;
1054 dstapic = mp_ioapics[ioapic].mp_apicid;
1055
1056 /*
1057 * Use the default configuration for the IRQs 0-15. Unless
1058 * overridden by (MADT) interrupt source override entries.
1059 */
1060 for (i = 0; i < 16; i++) {
1061 int idx;
1062
1063 for (idx = 0; idx < mp_irq_entries; idx++) {
1064 struct mp_config_intsrc *irq = mp_irqs + idx;
1065
1066 /* Do we already have a mapping for this ISA IRQ? */
1067 if (irq->mp_srcbus == MP_ISA_BUS
1068 && irq->mp_srcbusirq == i)
1069 break;
1070
1071 /* Do we already have a mapping for this IOAPIC pin */
1072 if (irq->mp_dstapic == dstapic &&
1073 irq->mp_dstirq == i)
1074 break;
1075 }
1076
1077 if (idx != mp_irq_entries) {
1078 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1079 continue; /* IRQ already used */
1080 }
1081
1082 mp_irq.mp_type = MP_INTSRC;
1083 mp_irq.mp_irqflag = 0; /* Conforming */
1084 mp_irq.mp_srcbus = MP_ISA_BUS;
1085 mp_irq.mp_dstapic = dstapic;
1086 mp_irq.mp_irqtype = mp_INT;
1087 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1088 mp_irq.mp_dstirq = i;
1089
1090 save_mp_irq(&mp_irq);
1091 }
1092 }
1093
1094 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1095 {
1096 int ioapic;
1097 int ioapic_pin;
1098 #ifdef CONFIG_X86_32
1099 #define MAX_GSI_NUM 4096
1100 #define IRQ_COMPRESSION_START 64
1101
1102 static int pci_irq = IRQ_COMPRESSION_START;
1103 /*
1104 * Mapping between Global System Interrupts, which
1105 * represent all possible interrupts, and IRQs
1106 * assigned to actual devices.
1107 */
1108 static int gsi_to_irq[MAX_GSI_NUM];
1109 #else
1110
1111 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1112 return gsi;
1113 #endif
1114
1115 /* Don't set up the ACPI SCI because it's already set up */
1116 if (acpi_gbl_FADT.sci_interrupt == gsi)
1117 return gsi;
1118
1119 ioapic = mp_find_ioapic(gsi);
1120 if (ioapic < 0) {
1121 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1122 return gsi;
1123 }
1124
1125 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1126
1127 #ifdef CONFIG_X86_32
1128 if (ioapic_renumber_irq)
1129 gsi = ioapic_renumber_irq(ioapic, gsi);
1130 #endif
1131
1132 /*
1133 * Avoid pin reprogramming. PRTs typically include entries
1134 * with redundant pin->gsi mappings (but unique PCI devices);
1135 * we only program the IOAPIC on the first.
1136 */
1137 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1138 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1139 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1140 ioapic_pin);
1141 return gsi;
1142 }
1143 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1144 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n",
1145 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1146 #ifdef CONFIG_X86_32
1147 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1148 #else
1149 return gsi;
1150 #endif
1151 }
1152
1153 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1154 #ifdef CONFIG_X86_32
1155 /*
1156 * For GSI >= 64, use IRQ compression
1157 */
1158 if ((gsi >= IRQ_COMPRESSION_START)
1159 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1160 /*
1161 * For PCI devices assign IRQs in order, avoiding gaps
1162 * due to unused I/O APIC pins.
1163 */
1164 int irq = gsi;
1165 if (gsi < MAX_GSI_NUM) {
1166 /*
1167 * Retain the VIA chipset work-around (gsi > 15), but
1168 * avoid a problem where the 8254 timer (IRQ0) is setup
1169 * via an override (so it's not on pin 0 of the ioapic),
1170 * and at the same time, the pin 0 interrupt is a PCI
1171 * type. The gsi > 15 test could cause these two pins
1172 * to be shared as IRQ0, and they are not shareable.
1173 * So test for this condition, and if necessary, avoid
1174 * the pin collision.
1175 */
1176 gsi = pci_irq++;
1177 /*
1178 * Don't assign IRQ used by ACPI SCI
1179 */
1180 if (gsi == acpi_gbl_FADT.sci_interrupt)
1181 gsi = pci_irq++;
1182 gsi_to_irq[irq] = gsi;
1183 } else {
1184 printk(KERN_ERR "GSI %u is too high\n", gsi);
1185 return gsi;
1186 }
1187 }
1188 #endif
1189 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1190 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1191 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1192 return gsi;
1193 }
1194
1195 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1196 u32 gsi, int triggering, int polarity)
1197 {
1198 #ifdef CONFIG_X86_MPPARSE
1199 struct mp_config_intsrc mp_irq;
1200 int ioapic;
1201
1202 if (!acpi_ioapic)
1203 return 0;
1204
1205 /* print the entry should happen on mptable identically */
1206 mp_irq.mp_type = MP_INTSRC;
1207 mp_irq.mp_irqtype = mp_INT;
1208 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1209 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1210 mp_irq.mp_srcbus = number;
1211 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1212 ioapic = mp_find_ioapic(gsi);
1213 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1214 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1215
1216 save_mp_irq(&mp_irq);
1217 #endif
1218 return 0;
1219 }
1220
1221 /*
1222 * Parse IOAPIC related entries in MADT
1223 * returns 0 on success, < 0 on error
1224 */
1225 static int __init acpi_parse_madt_ioapic_entries(void)
1226 {
1227 int count;
1228
1229 /*
1230 * ACPI interpreter is required to complete interrupt setup,
1231 * so if it is off, don't enumerate the io-apics with ACPI.
1232 * If MPS is present, it will handle them,
1233 * otherwise the system will stay in PIC mode
1234 */
1235 if (acpi_disabled || acpi_noirq) {
1236 return -ENODEV;
1237 }
1238
1239 if (!cpu_has_apic)
1240 return -ENODEV;
1241
1242 /*
1243 * if "noapic" boot option, don't look for IO-APICs
1244 */
1245 if (skip_ioapic_setup) {
1246 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1247 "due to 'noapic' option.\n");
1248 return -ENODEV;
1249 }
1250
1251 count =
1252 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1253 MAX_IO_APICS);
1254 if (!count) {
1255 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1256 return -ENODEV;
1257 } else if (count < 0) {
1258 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1259 return count;
1260 }
1261
1262 count =
1263 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1264 NR_IRQ_VECTORS);
1265 if (count < 0) {
1266 printk(KERN_ERR PREFIX
1267 "Error parsing interrupt source overrides entry\n");
1268 /* TBD: Cleanup to allow fallback to MPS */
1269 return count;
1270 }
1271
1272 /*
1273 * If BIOS did not supply an INT_SRC_OVR for the SCI
1274 * pretend we got one so we can set the SCI flags.
1275 */
1276 if (!acpi_sci_override_gsi)
1277 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1278
1279 /* Fill in identity legacy mapings where no override */
1280 mp_config_acpi_legacy_irqs();
1281
1282 count =
1283 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1284 NR_IRQ_VECTORS);
1285 if (count < 0) {
1286 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1287 /* TBD: Cleanup to allow fallback to MPS */
1288 return count;
1289 }
1290
1291 return 0;
1292 }
1293 #else
1294 static inline int acpi_parse_madt_ioapic_entries(void)
1295 {
1296 return -1;
1297 }
1298 #endif /* !CONFIG_X86_IO_APIC */
1299
1300 static void __init early_acpi_process_madt(void)
1301 {
1302 #ifdef CONFIG_X86_LOCAL_APIC
1303 int error;
1304
1305 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1306
1307 /*
1308 * Parse MADT LAPIC entries
1309 */
1310 error = early_acpi_parse_madt_lapic_addr_ovr();
1311 if (!error) {
1312 acpi_lapic = 1;
1313 smp_found_config = 1;
1314 }
1315 if (error == -EINVAL) {
1316 /*
1317 * Dell Precision Workstation 410, 610 come here.
1318 */
1319 printk(KERN_ERR PREFIX
1320 "Invalid BIOS MADT, disabling ACPI\n");
1321 disable_acpi();
1322 }
1323 }
1324 #endif
1325 }
1326
1327 static void __init acpi_process_madt(void)
1328 {
1329 #ifdef CONFIG_X86_LOCAL_APIC
1330 int error;
1331
1332 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1333
1334 /*
1335 * Parse MADT LAPIC entries
1336 */
1337 error = acpi_parse_madt_lapic_entries();
1338 if (!error) {
1339 acpi_lapic = 1;
1340
1341 #ifdef CONFIG_X86_GENERICARCH
1342 generic_bigsmp_probe();
1343 #endif
1344 /*
1345 * Parse MADT IO-APIC entries
1346 */
1347 error = acpi_parse_madt_ioapic_entries();
1348 if (!error) {
1349 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1350 acpi_irq_balance_set(NULL);
1351 acpi_ioapic = 1;
1352
1353 smp_found_config = 1;
1354 #ifdef CONFIG_X86_32
1355 setup_apic_routing();
1356 #endif
1357 }
1358 }
1359 if (error == -EINVAL) {
1360 /*
1361 * Dell Precision Workstation 410, 610 come here.
1362 */
1363 printk(KERN_ERR PREFIX
1364 "Invalid BIOS MADT, disabling ACPI\n");
1365 disable_acpi();
1366 }
1367 }
1368 #endif
1369 return;
1370 }
1371
1372 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1373 {
1374 if (!acpi_force) {
1375 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1376 d->ident);
1377 acpi_noirq_set();
1378 }
1379 return 0;
1380 }
1381
1382 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1383 {
1384 if (!acpi_force) {
1385 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1386 d->ident);
1387 acpi_disable_pci();
1388 }
1389 return 0;
1390 }
1391
1392 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1393 {
1394 if (!acpi_force) {
1395 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1396 disable_acpi();
1397 } else {
1398 printk(KERN_NOTICE
1399 "Warning: DMI blacklist says broken, but acpi forced\n");
1400 }
1401 return 0;
1402 }
1403
1404 /*
1405 * Limit ACPI to CPU enumeration for HT
1406 */
1407 static int __init force_acpi_ht(const struct dmi_system_id *d)
1408 {
1409 if (!acpi_force) {
1410 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1411 d->ident);
1412 disable_acpi();
1413 acpi_ht = 1;
1414 } else {
1415 printk(KERN_NOTICE
1416 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1417 }
1418 return 0;
1419 }
1420
1421 /*
1422 * Force ignoring BIOS IRQ0 pin2 override
1423 */
1424 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1425 {
1426 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
1427 acpi_skip_timer_override = 1;
1428 return 0;
1429 }
1430
1431 /*
1432 * If your system is blacklisted here, but you find that acpi=force
1433 * works for you, please contact acpi-devel@sourceforge.net
1434 */
1435 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1436 /*
1437 * Boxes that need ACPI disabled
1438 */
1439 {
1440 .callback = dmi_disable_acpi,
1441 .ident = "IBM Thinkpad",
1442 .matches = {
1443 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1444 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1445 },
1446 },
1447
1448 /*
1449 * Boxes that need acpi=ht
1450 */
1451 {
1452 .callback = force_acpi_ht,
1453 .ident = "FSC Primergy T850",
1454 .matches = {
1455 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1456 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1457 },
1458 },
1459 {
1460 .callback = force_acpi_ht,
1461 .ident = "HP VISUALIZE NT Workstation",
1462 .matches = {
1463 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1465 },
1466 },
1467 {
1468 .callback = force_acpi_ht,
1469 .ident = "Compaq Workstation W8000",
1470 .matches = {
1471 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1472 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1473 },
1474 },
1475 {
1476 .callback = force_acpi_ht,
1477 .ident = "ASUS P4B266",
1478 .matches = {
1479 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1480 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1481 },
1482 },
1483 {
1484 .callback = force_acpi_ht,
1485 .ident = "ASUS P2B-DS",
1486 .matches = {
1487 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1488 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1489 },
1490 },
1491 {
1492 .callback = force_acpi_ht,
1493 .ident = "ASUS CUR-DLS",
1494 .matches = {
1495 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1496 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1497 },
1498 },
1499 {
1500 .callback = force_acpi_ht,
1501 .ident = "ABIT i440BX-W83977",
1502 .matches = {
1503 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1504 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1505 },
1506 },
1507 {
1508 .callback = force_acpi_ht,
1509 .ident = "IBM Bladecenter",
1510 .matches = {
1511 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1512 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1513 },
1514 },
1515 {
1516 .callback = force_acpi_ht,
1517 .ident = "IBM eServer xSeries 360",
1518 .matches = {
1519 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1520 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1521 },
1522 },
1523 {
1524 .callback = force_acpi_ht,
1525 .ident = "IBM eserver xSeries 330",
1526 .matches = {
1527 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1528 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1529 },
1530 },
1531 {
1532 .callback = force_acpi_ht,
1533 .ident = "IBM eserver xSeries 440",
1534 .matches = {
1535 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1536 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1537 },
1538 },
1539
1540 /*
1541 * Boxes that need ACPI PCI IRQ routing disabled
1542 */
1543 {
1544 .callback = disable_acpi_irq,
1545 .ident = "ASUS A7V",
1546 .matches = {
1547 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1548 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1549 /* newer BIOS, Revision 1011, does work */
1550 DMI_MATCH(DMI_BIOS_VERSION,
1551 "ASUS A7V ACPI BIOS Revision 1007"),
1552 },
1553 },
1554 {
1555 /*
1556 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1557 * for LPC bridge, which is needed for the PCI
1558 * interrupt links to work. DSDT fix is in bug 5966.
1559 * 2645, 2646 model numbers are shared with 600/600E/600X
1560 */
1561 .callback = disable_acpi_irq,
1562 .ident = "IBM Thinkpad 600 Series 2645",
1563 .matches = {
1564 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1565 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1566 },
1567 },
1568 {
1569 .callback = disable_acpi_irq,
1570 .ident = "IBM Thinkpad 600 Series 2646",
1571 .matches = {
1572 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1573 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1574 },
1575 },
1576 /*
1577 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1578 */
1579 { /* _BBN 0 bug */
1580 .callback = disable_acpi_pci,
1581 .ident = "ASUS PR-DLS",
1582 .matches = {
1583 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1584 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1585 DMI_MATCH(DMI_BIOS_VERSION,
1586 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1587 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1588 },
1589 },
1590 {
1591 .callback = disable_acpi_pci,
1592 .ident = "Acer TravelMate 36x Laptop",
1593 .matches = {
1594 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1595 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1596 },
1597 },
1598 /*
1599 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1600 * which includes some code which overrides all temperature
1601 * trip points to 16C if the INTIN2 input of the I/O APIC
1602 * is enabled. This input is incorrectly designated the
1603 * ISA IRQ 0 via an interrupt source override even though
1604 * it is wired to the output of the master 8259A and INTIN0
1605 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1606 * override in that cases.
1607 */
1608 {
1609 .callback = dmi_ignore_irq0_timer_override,
1610 .ident = "HP NX6125 laptop",
1611 .matches = {
1612 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1613 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1614 },
1615 },
1616 {
1617 .callback = dmi_ignore_irq0_timer_override,
1618 .ident = "HP NX6325 laptop",
1619 .matches = {
1620 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1621 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1622 },
1623 },
1624 {}
1625 };
1626
1627 /*
1628 * acpi_boot_table_init() and acpi_boot_init()
1629 * called from setup_arch(), always.
1630 * 1. checksums all tables
1631 * 2. enumerates lapics
1632 * 3. enumerates io-apics
1633 *
1634 * acpi_table_init() is separate to allow reading SRAT without
1635 * other side effects.
1636 *
1637 * side effects of acpi_boot_init:
1638 * acpi_lapic = 1 if LAPIC found
1639 * acpi_ioapic = 1 if IOAPIC found
1640 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1641 * if acpi_blacklisted() acpi_disabled = 1;
1642 * acpi_irq_model=...
1643 * ...
1644 *
1645 * return value: (currently ignored)
1646 * 0: success
1647 * !0: failure
1648 */
1649
1650 int __init acpi_boot_table_init(void)
1651 {
1652 int error;
1653
1654 dmi_check_system(acpi_dmi_table);
1655
1656 /*
1657 * If acpi_disabled, bail out
1658 * One exception: acpi=ht continues far enough to enumerate LAPICs
1659 */
1660 if (acpi_disabled && !acpi_ht)
1661 return 1;
1662
1663 /*
1664 * Initialize the ACPI boot-time table parser.
1665 */
1666 error = acpi_table_init();
1667 if (error) {
1668 disable_acpi();
1669 return error;
1670 }
1671
1672 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1673
1674 /*
1675 * blacklist may disable ACPI entirely
1676 */
1677 error = acpi_blacklisted();
1678 if (error) {
1679 if (acpi_force) {
1680 printk(KERN_WARNING PREFIX "acpi=force override\n");
1681 } else {
1682 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1683 disable_acpi();
1684 return error;
1685 }
1686 }
1687
1688 return 0;
1689 }
1690
1691 int __init early_acpi_boot_init(void)
1692 {
1693 /*
1694 * If acpi_disabled, bail out
1695 * One exception: acpi=ht continues far enough to enumerate LAPICs
1696 */
1697 if (acpi_disabled && !acpi_ht)
1698 return 1;
1699
1700 /*
1701 * Process the Multiple APIC Description Table (MADT), if present
1702 */
1703 early_acpi_process_madt();
1704
1705 return 0;
1706 }
1707
1708 int __init acpi_boot_init(void)
1709 {
1710 /*
1711 * If acpi_disabled, bail out
1712 * One exception: acpi=ht continues far enough to enumerate LAPICs
1713 */
1714 if (acpi_disabled && !acpi_ht)
1715 return 1;
1716
1717 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1718
1719 /*
1720 * set sci_int and PM timer address
1721 */
1722 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1723
1724 /*
1725 * Process the Multiple APIC Description Table (MADT), if present
1726 */
1727 acpi_process_madt();
1728
1729 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1730
1731 return 0;
1732 }
1733
1734 static int __init parse_acpi(char *arg)
1735 {
1736 if (!arg)
1737 return -EINVAL;
1738
1739 /* "acpi=off" disables both ACPI table parsing and interpreter */
1740 if (strcmp(arg, "off") == 0) {
1741 disable_acpi();
1742 }
1743 /* acpi=force to over-ride black-list */
1744 else if (strcmp(arg, "force") == 0) {
1745 acpi_force = 1;
1746 acpi_ht = 1;
1747 acpi_disabled = 0;
1748 }
1749 /* acpi=strict disables out-of-spec workarounds */
1750 else if (strcmp(arg, "strict") == 0) {
1751 acpi_strict = 1;
1752 }
1753 /* Limit ACPI just to boot-time to enable HT */
1754 else if (strcmp(arg, "ht") == 0) {
1755 if (!acpi_force)
1756 disable_acpi();
1757 acpi_ht = 1;
1758 }
1759 /* "acpi=noirq" disables ACPI interrupt routing */
1760 else if (strcmp(arg, "noirq") == 0) {
1761 acpi_noirq_set();
1762 } else {
1763 /* Core will printk when we return error. */
1764 return -EINVAL;
1765 }
1766 return 0;
1767 }
1768 early_param("acpi", parse_acpi);
1769
1770 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1771 static int __init parse_pci(char *arg)
1772 {
1773 if (arg && strcmp(arg, "noacpi") == 0)
1774 acpi_disable_pci();
1775 return 0;
1776 }
1777 early_param("pci", parse_pci);
1778
1779 int __init acpi_mps_check(void)
1780 {
1781 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1782 /* mptable code is not built-in*/
1783 if (acpi_disabled || acpi_noirq) {
1784 printk(KERN_WARNING "MPS support code is not built-in.\n"
1785 "Using acpi=off or acpi=noirq or pci=noacpi "
1786 "may have problem\n");
1787 return 1;
1788 }
1789 #endif
1790 return 0;
1791 }
1792
1793 #ifdef CONFIG_X86_IO_APIC
1794 static int __init parse_acpi_skip_timer_override(char *arg)
1795 {
1796 acpi_skip_timer_override = 1;
1797 return 0;
1798 }
1799 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1800
1801 static int __init parse_acpi_use_timer_override(char *arg)
1802 {
1803 acpi_use_timer_override = 1;
1804 return 0;
1805 }
1806 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1807 #endif /* CONFIG_X86_IO_APIC */
1808
1809 static int __init setup_acpi_sci(char *s)
1810 {
1811 if (!s)
1812 return -EINVAL;
1813 if (!strcmp(s, "edge"))
1814 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1815 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1816 else if (!strcmp(s, "level"))
1817 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1818 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1819 else if (!strcmp(s, "high"))
1820 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1821 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1822 else if (!strcmp(s, "low"))
1823 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1824 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1825 else
1826 return -EINVAL;
1827 return 0;
1828 }
1829 early_param("acpi_sci", setup_acpi_sci);
1830
1831 int __acpi_acquire_global_lock(unsigned int *lock)
1832 {
1833 unsigned int old, new, val;
1834 do {
1835 old = *lock;
1836 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1837 val = cmpxchg(lock, old, new);
1838 } while (unlikely (val != old));
1839 return (new < 3) ? -1 : 0;
1840 }
1841
1842 int __acpi_release_global_lock(unsigned int *lock)
1843 {
1844 unsigned int old, new, val;
1845 do {
1846 old = *lock;
1847 new = old & ~0x3;
1848 val = cmpxchg(lock, old, new);
1849 } while (unlikely (val != old));
1850 return old & 0x1;
1851 }
Linux kernel - Deliverables
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