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acpi: remove final __acpi_map_table mapping before setting acpi_gbl_permanent_mmap
[linux-2.6/x86.git] / arch / x86 / kernel / acpi / boot.c
blob7217834f6b1dbc37d0f725059086cad01f612c80
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 u32 acpi_rsdt_forced;
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
62 #else /* X86 */
63
64 #ifdef CONFIG_X86_LOCAL_APIC
65 #include <mach_apic.h>
66 #include <mach_mpparse.h>
67 #endif /* CONFIG_X86_LOCAL_APIC */
68
69 #endif /* X86 */
70
71 #define BAD_MADT_ENTRY(entry, end) ( \
72 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
73 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
74
75 #define PREFIX "ACPI: "
76
77 int acpi_noirq; /* skip ACPI IRQ initialization */
78 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
79 EXPORT_SYMBOL(acpi_pci_disabled);
80 int acpi_ht __initdata = 1; /* enable HT */
81
82 int acpi_lapic;
83 int acpi_ioapic;
84 int acpi_strict;
85
86 u8 acpi_sci_flags __initdata;
87 int acpi_sci_override_gsi __initdata;
88 int acpi_skip_timer_override __initdata;
89 int acpi_use_timer_override __initdata;
90
91 #ifdef CONFIG_X86_LOCAL_APIC
92 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
93 #endif
94
95 #ifndef __HAVE_ARCH_CMPXCHG
96 #warning ACPI uses CMPXCHG, i486 and later hardware
97 #endif
98
99 /* --------------------------------------------------------------------------
100 Boot-time Configuration
101 -------------------------------------------------------------------------- */
102
103 /*
104 * The default interrupt routing model is PIC (8259). This gets
105 * overridden if IOAPICs are enumerated (below).
106 */
107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
108
109
110 /*
111 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
112 * to map the target physical address. The problem is that set_fixmap()
113 * provides a single page, and it is possible that the page is not
114 * sufficient.
115 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
116 * i.e. until the next __va_range() call.
117 *
118 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
119 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
120 * count idx down while incrementing the phys address.
121 */
122 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
123 {
124 static char *prev_map;
125 static unsigned long prev_size;
126
127 if (prev_map) {
128 early_iounmap(prev_map, prev_size);
129 prev_map = NULL;
130 }
131
132 if (!phys || !size)
133 return NULL;
134
135 prev_size = size;
136 prev_map = early_ioremap(phys, size);
137
138 return prev_map;
139 }
140
141 #ifdef CONFIG_PCI_MMCONFIG
142
143 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
144
145 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
146 struct acpi_mcfg_allocation *pci_mmcfg_config;
147 int pci_mmcfg_config_num;
148
149 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
150 {
151 if (!strcmp(mcfg->header.oem_id, "SGI"))
152 acpi_mcfg_64bit_base_addr = TRUE;
153
154 return 0;
155 }
156
157 int __init acpi_parse_mcfg(struct acpi_table_header *header)
158 {
159 struct acpi_table_mcfg *mcfg;
160 unsigned long i;
161 int config_size;
162
163 if (!header)
164 return -EINVAL;
165
166 mcfg = (struct acpi_table_mcfg *)header;
167
168 /* how many config structures do we have */
169 pci_mmcfg_config_num = 0;
170 i = header->length - sizeof(struct acpi_table_mcfg);
171 while (i >= sizeof(struct acpi_mcfg_allocation)) {
172 ++pci_mmcfg_config_num;
173 i -= sizeof(struct acpi_mcfg_allocation);
174 };
175 if (pci_mmcfg_config_num == 0) {
176 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
177 return -ENODEV;
178 }
179
180 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
181 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
182 if (!pci_mmcfg_config) {
183 printk(KERN_WARNING PREFIX
184 "No memory for MCFG config tables\n");
185 return -ENOMEM;
186 }
187
188 memcpy(pci_mmcfg_config, &mcfg[1], config_size);
189
190 acpi_mcfg_oem_check(mcfg);
191
192 for (i = 0; i < pci_mmcfg_config_num; ++i) {
193 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
194 !acpi_mcfg_64bit_base_addr) {
195 printk(KERN_ERR PREFIX
196 "MMCONFIG not in low 4GB of memory\n");
197 kfree(pci_mmcfg_config);
198 pci_mmcfg_config_num = 0;
199 return -ENODEV;
200 }
201 }
202
203 return 0;
204 }
205 #endif /* CONFIG_PCI_MMCONFIG */
206
207 #ifdef CONFIG_X86_LOCAL_APIC
208 static int __init acpi_parse_madt(struct acpi_table_header *table)
209 {
210 struct acpi_table_madt *madt = NULL;
211
212 if (!cpu_has_apic)
213 return -EINVAL;
214
215 madt = (struct acpi_table_madt *)table;
216 if (!madt) {
217 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
218 return -ENODEV;
219 }
220
221 if (madt->address) {
222 acpi_lapic_addr = (u64) madt->address;
223
224 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
225 madt->address);
226 }
227
228 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
229
230 return 0;
231 }
232
233 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
234 {
235 unsigned int ver = 0;
236
237 if (!enabled) {
238 ++disabled_cpus;
239 return;
240 }
241
242 if (boot_cpu_physical_apicid != -1U)
243 ver = apic_version[boot_cpu_physical_apicid];
244
245 generic_processor_info(id, ver);
246 }
247
248 static int __init
249 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
250 {
251 struct acpi_madt_local_apic *processor = NULL;
252
253 processor = (struct acpi_madt_local_apic *)header;
254
255 if (BAD_MADT_ENTRY(processor, end))
256 return -EINVAL;
257
258 acpi_table_print_madt_entry(header);
259
260 /*
261 * We need to register disabled CPU as well to permit
262 * counting disabled CPUs. This allows us to size
263 * cpus_possible_map more accurately, to permit
264 * to not preallocating memory for all NR_CPUS
265 * when we use CPU hotplug.
266 */
267 acpi_register_lapic(processor->id, /* APIC ID */
268 processor->lapic_flags & ACPI_MADT_ENABLED);
269
270 return 0;
271 }
272
273 static int __init
274 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
275 {
276 struct acpi_madt_local_sapic *processor = NULL;
277
278 processor = (struct acpi_madt_local_sapic *)header;
279
280 if (BAD_MADT_ENTRY(processor, end))
281 return -EINVAL;
282
283 acpi_table_print_madt_entry(header);
284
285 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
286 processor->lapic_flags & ACPI_MADT_ENABLED);
287
288 return 0;
289 }
290
291 static int __init
292 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
293 const unsigned long end)
294 {
295 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
296
297 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
298
299 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
300 return -EINVAL;
301
302 acpi_lapic_addr = lapic_addr_ovr->address;
303
304 return 0;
305 }
306
307 static int __init
308 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
309 {
310 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
311
312 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
313
314 if (BAD_MADT_ENTRY(lapic_nmi, end))
315 return -EINVAL;
316
317 acpi_table_print_madt_entry(header);
318
319 if (lapic_nmi->lint != 1)
320 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
321
322 return 0;
323 }
324
325 #endif /*CONFIG_X86_LOCAL_APIC */
326
327 #ifdef CONFIG_X86_IO_APIC
328
329 static int __init
330 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
331 {
332 struct acpi_madt_io_apic *ioapic = NULL;
333
334 ioapic = (struct acpi_madt_io_apic *)header;
335
336 if (BAD_MADT_ENTRY(ioapic, end))
337 return -EINVAL;
338
339 acpi_table_print_madt_entry(header);
340
341 mp_register_ioapic(ioapic->id,
342 ioapic->address, ioapic->global_irq_base);
343
344 return 0;
345 }
346
347 /*
348 * Parse Interrupt Source Override for the ACPI SCI
349 */
350 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
351 {
352 if (trigger == 0) /* compatible SCI trigger is level */
353 trigger = 3;
354
355 if (polarity == 0) /* compatible SCI polarity is low */
356 polarity = 3;
357
358 /* Command-line over-ride via acpi_sci= */
359 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
360 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
361
362 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
363 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
364
365 /*
366 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
367 * If GSI is < 16, this will update its flags,
368 * else it will create a new mp_irqs[] entry.
369 */
370 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
371
372 /*
373 * stash over-ride to indicate we've been here
374 * and for later update of acpi_gbl_FADT
375 */
376 acpi_sci_override_gsi = gsi;
377 return;
378 }
379
380 static int __init
381 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
382 const unsigned long end)
383 {
384 struct acpi_madt_interrupt_override *intsrc = NULL;
385
386 intsrc = (struct acpi_madt_interrupt_override *)header;
387
388 if (BAD_MADT_ENTRY(intsrc, end))
389 return -EINVAL;
390
391 acpi_table_print_madt_entry(header);
392
393 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
394 acpi_sci_ioapic_setup(intsrc->global_irq,
395 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
396 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
397 return 0;
398 }
399
400 if (acpi_skip_timer_override &&
401 intsrc->source_irq == 0 && intsrc->global_irq == 2) {
402 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
403 return 0;
404 }
405
406 mp_override_legacy_irq(intsrc->source_irq,
407 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
408 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
409 intsrc->global_irq);
410
411 return 0;
412 }
413
414 static int __init
415 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
416 {
417 struct acpi_madt_nmi_source *nmi_src = NULL;
418
419 nmi_src = (struct acpi_madt_nmi_source *)header;
420
421 if (BAD_MADT_ENTRY(nmi_src, end))
422 return -EINVAL;
423
424 acpi_table_print_madt_entry(header);
425
426 /* TBD: Support nimsrc entries? */
427
428 return 0;
429 }
430
431 #endif /* CONFIG_X86_IO_APIC */
432
433 /*
434 * acpi_pic_sci_set_trigger()
435 *
436 * use ELCR to set PIC-mode trigger type for SCI
437 *
438 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
439 * it may require Edge Trigger -- use "acpi_sci=edge"
440 *
441 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
442 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
443 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
444 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
445 */
446
447 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
448 {
449 unsigned int mask = 1 << irq;
450 unsigned int old, new;
451
452 /* Real old ELCR mask */
453 old = inb(0x4d0) | (inb(0x4d1) << 8);
454
455 /*
456 * If we use ACPI to set PCI IRQs, then we should clear ELCR
457 * since we will set it correctly as we enable the PCI irq
458 * routing.
459 */
460 new = acpi_noirq ? old : 0;
461
462 /*
463 * Update SCI information in the ELCR, it isn't in the PCI
464 * routing tables..
465 */
466 switch (trigger) {
467 case 1: /* Edge - clear */
468 new &= ~mask;
469 break;
470 case 3: /* Level - set */
471 new |= mask;
472 break;
473 }
474
475 if (old == new)
476 return;
477
478 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
479 outb(new, 0x4d0);
480 outb(new >> 8, 0x4d1);
481 }
482
483 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
484 {
485 *irq = gsi;
486 return 0;
487 }
488
489 /*
490 * success: return IRQ number (>=0)
491 * failure: return < 0
492 */
493 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
494 {
495 unsigned int irq;
496 unsigned int plat_gsi = gsi;
497
498 #ifdef CONFIG_PCI
499 /*
500 * Make sure all (legacy) PCI IRQs are set as level-triggered.
501 */
502 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
503 if (triggering == ACPI_LEVEL_SENSITIVE)
504 eisa_set_level_irq(gsi);
505 }
506 #endif
507
508 #ifdef CONFIG_X86_IO_APIC
509 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
510 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
511 }
512 #endif
513 acpi_gsi_to_irq(plat_gsi, &irq);
514 return irq;
515 }
516
517 /*
518 * ACPI based hotplug support for CPU
519 */
520 #ifdef CONFIG_ACPI_HOTPLUG_CPU
521
522 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
523 {
524 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
525 union acpi_object *obj;
526 struct acpi_madt_local_apic *lapic;
527 cpumask_var_t tmp_map, new_map;
528 u8 physid;
529 int cpu;
530 int retval = -ENOMEM;
531
532 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
533 return -EINVAL;
534
535 if (!buffer.length || !buffer.pointer)
536 return -EINVAL;
537
538 obj = buffer.pointer;
539 if (obj->type != ACPI_TYPE_BUFFER ||
540 obj->buffer.length < sizeof(*lapic)) {
541 kfree(buffer.pointer);
542 return -EINVAL;
543 }
544
545 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
546
547 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
548 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
549 kfree(buffer.pointer);
550 return -EINVAL;
551 }
552
553 physid = lapic->id;
554
555 kfree(buffer.pointer);
556 buffer.length = ACPI_ALLOCATE_BUFFER;
557 buffer.pointer = NULL;
558
559 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
560 goto out;
561
562 if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
563 goto free_tmp_map;
564
565 cpumask_copy(tmp_map, cpu_present_mask);
566 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
567
568 /*
569 * If mp_register_lapic successfully generates a new logical cpu
570 * number, then the following will get us exactly what was mapped
571 */
572 cpumask_andnot(new_map, cpu_present_mask, tmp_map);
573 if (cpumask_empty(new_map)) {
574 printk ("Unable to map lapic to logical cpu number\n");
575 retval = -EINVAL;
576 goto free_new_map;
577 }
578
579 cpu = cpumask_first(new_map);
580
581 *pcpu = cpu;
582 retval = 0;
583
584 free_new_map:
585 free_cpumask_var(new_map);
586 free_tmp_map:
587 free_cpumask_var(tmp_map);
588 out:
589 return retval;
590 }
591
592 /* wrapper to silence section mismatch warning */
593 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
594 {
595 return _acpi_map_lsapic(handle, pcpu);
596 }
597 EXPORT_SYMBOL(acpi_map_lsapic);
598
599 int acpi_unmap_lsapic(int cpu)
600 {
601 per_cpu(x86_cpu_to_apicid, cpu) = -1;
602 set_cpu_present(cpu, false);
603 num_processors--;
604
605 return (0);
606 }
607
608 EXPORT_SYMBOL(acpi_unmap_lsapic);
609 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
610
611 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
612 {
613 /* TBD */
614 return -EINVAL;
615 }
616
617 EXPORT_SYMBOL(acpi_register_ioapic);
618
619 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
620 {
621 /* TBD */
622 return -EINVAL;
623 }
624
625 EXPORT_SYMBOL(acpi_unregister_ioapic);
626
627 static int __init acpi_parse_sbf(struct acpi_table_header *table)
628 {
629 struct acpi_table_boot *sb;
630
631 sb = (struct acpi_table_boot *)table;
632 if (!sb) {
633 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
634 return -ENODEV;
635 }
636
637 sbf_port = sb->cmos_index; /* Save CMOS port */
638
639 return 0;
640 }
641
642 #ifdef CONFIG_HPET_TIMER
643 #include <asm/hpet.h>
644
645 static struct __initdata resource *hpet_res;
646
647 static int __init acpi_parse_hpet(struct acpi_table_header *table)
648 {
649 struct acpi_table_hpet *hpet_tbl;
650
651 hpet_tbl = (struct acpi_table_hpet *)table;
652 if (!hpet_tbl) {
653 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
654 return -ENODEV;
655 }
656
657 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
658 printk(KERN_WARNING PREFIX "HPET timers must be located in "
659 "memory.\n");
660 return -1;
661 }
662
663 hpet_address = hpet_tbl->address.address;
664
665 /*
666 * Some broken BIOSes advertise HPET at 0x0. We really do not
667 * want to allocate a resource there.
668 */
669 if (!hpet_address) {
670 printk(KERN_WARNING PREFIX
671 "HPET id: %#x base: %#lx is invalid\n",
672 hpet_tbl->id, hpet_address);
673 return 0;
674 }
675 #ifdef CONFIG_X86_64
676 /*
677 * Some even more broken BIOSes advertise HPET at
678 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
679 * some noise:
680 */
681 if (hpet_address == 0xfed0000000000000UL) {
682 if (!hpet_force_user) {
683 printk(KERN_WARNING PREFIX "HPET id: %#x "
684 "base: 0xfed0000000000000 is bogus\n "
685 "try hpet=force on the kernel command line to "
686 "fix it up to 0xfed00000.\n", hpet_tbl->id);
687 hpet_address = 0;
688 return 0;
689 }
690 printk(KERN_WARNING PREFIX
691 "HPET id: %#x base: 0xfed0000000000000 fixed up "
692 "to 0xfed00000.\n", hpet_tbl->id);
693 hpet_address >>= 32;
694 }
695 #endif
696 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
697 hpet_tbl->id, hpet_address);
698
699 /*
700 * Allocate and initialize the HPET firmware resource for adding into
701 * the resource tree during the lateinit timeframe.
702 */
703 #define HPET_RESOURCE_NAME_SIZE 9
704 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
705
706 hpet_res->name = (void *)&hpet_res[1];
707 hpet_res->flags = IORESOURCE_MEM;
708 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
709 hpet_tbl->sequence);
710
711 hpet_res->start = hpet_address;
712 hpet_res->end = hpet_address + (1 * 1024) - 1;
713
714 return 0;
715 }
716
717 /*
718 * hpet_insert_resource inserts the HPET resources used into the resource
719 * tree.
720 */
721 static __init int hpet_insert_resource(void)
722 {
723 if (!hpet_res)
724 return 1;
725
726 return insert_resource(&iomem_resource, hpet_res);
727 }
728
729 late_initcall(hpet_insert_resource);
730
731 #else
732 #define acpi_parse_hpet NULL
733 #endif
734
735 static int __init acpi_parse_fadt(struct acpi_table_header *table)
736 {
737
738 #ifdef CONFIG_X86_PM_TIMER
739 /* detect the location of the ACPI PM Timer */
740 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
741 /* FADT rev. 2 */
742 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
743 ACPI_ADR_SPACE_SYSTEM_IO)
744 return 0;
745
746 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
747 /*
748 * "X" fields are optional extensions to the original V1.0
749 * fields, so we must selectively expand V1.0 fields if the
750 * corresponding X field is zero.
751 */
752 if (!pmtmr_ioport)
753 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
754 } else {
755 /* FADT rev. 1 */
756 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
757 }
758 if (pmtmr_ioport)
759 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
760 pmtmr_ioport);
761 #endif
762 return 0;
763 }
764
765 #ifdef CONFIG_X86_LOCAL_APIC
766 /*
767 * Parse LAPIC entries in MADT
768 * returns 0 on success, < 0 on error
769 */
770
771 static void __init acpi_register_lapic_address(unsigned long address)
772 {
773 mp_lapic_addr = address;
774
775 set_fixmap_nocache(FIX_APIC_BASE, address);
776 if (boot_cpu_physical_apicid == -1U) {
777 boot_cpu_physical_apicid = read_apic_id();
778 apic_version[boot_cpu_physical_apicid] =
779 GET_APIC_VERSION(apic_read(APIC_LVR));
780 }
781 }
782
783 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
784 {
785 int count;
786
787 if (!cpu_has_apic)
788 return -ENODEV;
789
790 /*
791 * Note that the LAPIC address is obtained from the MADT (32-bit value)
792 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
793 */
794
795 count =
796 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
797 acpi_parse_lapic_addr_ovr, 0);
798 if (count < 0) {
799 printk(KERN_ERR PREFIX
800 "Error parsing LAPIC address override entry\n");
801 return count;
802 }
803
804 acpi_register_lapic_address(acpi_lapic_addr);
805
806 return count;
807 }
808
809 static int __init acpi_parse_madt_lapic_entries(void)
810 {
811 int count;
812
813 if (!cpu_has_apic)
814 return -ENODEV;
815
816 /*
817 * Note that the LAPIC address is obtained from the MADT (32-bit value)
818 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
819 */
820
821 count =
822 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
823 acpi_parse_lapic_addr_ovr, 0);
824 if (count < 0) {
825 printk(KERN_ERR PREFIX
826 "Error parsing LAPIC address override entry\n");
827 return count;
828 }
829
830 acpi_register_lapic_address(acpi_lapic_addr);
831
832 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
833 acpi_parse_sapic, MAX_APICS);
834
835 if (!count)
836 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
837 acpi_parse_lapic, MAX_APICS);
838 if (!count) {
839 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
840 /* TBD: Cleanup to allow fallback to MPS */
841 return -ENODEV;
842 } else if (count < 0) {
843 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
844 /* TBD: Cleanup to allow fallback to MPS */
845 return count;
846 }
847
848 count =
849 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
850 if (count < 0) {
851 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
852 /* TBD: Cleanup to allow fallback to MPS */
853 return count;
854 }
855 return 0;
856 }
857 #endif /* CONFIG_X86_LOCAL_APIC */
858
859 #ifdef CONFIG_X86_IO_APIC
860 #define MP_ISA_BUS 0
861
862 #ifdef CONFIG_X86_ES7000
863 extern int es7000_plat;
864 #endif
865
866 static struct {
867 int apic_id;
868 int gsi_base;
869 int gsi_end;
870 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
871 } mp_ioapic_routing[MAX_IO_APICS];
872
873 static int mp_find_ioapic(int gsi)
874 {
875 int i = 0;
876
877 /* Find the IOAPIC that manages this GSI. */
878 for (i = 0; i < nr_ioapics; i++) {
879 if ((gsi >= mp_ioapic_routing[i].gsi_base)
880 && (gsi <= mp_ioapic_routing[i].gsi_end))
881 return i;
882 }
883
884 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
885 return -1;
886 }
887
888 static u8 __init uniq_ioapic_id(u8 id)
889 {
890 #ifdef CONFIG_X86_32
891 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
892 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
893 return io_apic_get_unique_id(nr_ioapics, id);
894 else
895 return id;
896 #else
897 int i;
898 DECLARE_BITMAP(used, 256);
899 bitmap_zero(used, 256);
900 for (i = 0; i < nr_ioapics; i++) {
901 struct mp_config_ioapic *ia = &mp_ioapics[i];
902 __set_bit(ia->mp_apicid, used);
903 }
904 if (!test_bit(id, used))
905 return id;
906 return find_first_zero_bit(used, 256);
907 #endif
908 }
909
910 static int bad_ioapic(unsigned long address)
911 {
912 if (nr_ioapics >= MAX_IO_APICS) {
913 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
914 "(found %d)\n", MAX_IO_APICS, nr_ioapics);
915 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
916 }
917 if (!address) {
918 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
919 " found in table, skipping!\n");
920 return 1;
921 }
922 return 0;
923 }
924
925 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
926 {
927 int idx = 0;
928
929 if (bad_ioapic(address))
930 return;
931
932 idx = nr_ioapics;
933
934 mp_ioapics[idx].mp_type = MP_IOAPIC;
935 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
936 mp_ioapics[idx].mp_apicaddr = address;
937
938 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
939 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
940 #ifdef CONFIG_X86_32
941 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
942 #else
943 mp_ioapics[idx].mp_apicver = 0;
944 #endif
945 /*
946 * Build basic GSI lookup table to facilitate gsi->io_apic lookups
947 * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
948 */
949 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
950 mp_ioapic_routing[idx].gsi_base = gsi_base;
951 mp_ioapic_routing[idx].gsi_end = gsi_base +
952 io_apic_get_redir_entries(idx);
953
954 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
955 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
956 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
957 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
958
959 nr_ioapics++;
960 }
961
962 static void assign_to_mp_irq(struct mp_config_intsrc *m,
963 struct mp_config_intsrc *mp_irq)
964 {
965 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
966 }
967
968 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
969 struct mp_config_intsrc *m)
970 {
971 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
972 }
973
974 static void save_mp_irq(struct mp_config_intsrc *m)
975 {
976 int i;
977
978 for (i = 0; i < mp_irq_entries; i++) {
979 if (!mp_irq_cmp(&mp_irqs[i], m))
980 return;
981 }
982
983 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
984 if (++mp_irq_entries == MAX_IRQ_SOURCES)
985 panic("Max # of irq sources exceeded!!\n");
986 }
987
988 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
989 {
990 int ioapic;
991 int pin;
992 struct mp_config_intsrc mp_irq;
993
994 /*
995 * Convert 'gsi' to 'ioapic.pin'.
996 */
997 ioapic = mp_find_ioapic(gsi);
998 if (ioapic < 0)
999 return;
1000 pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1001
1002 /*
1003 * TBD: This check is for faulty timer entries, where the override
1004 * erroneously sets the trigger to level, resulting in a HUGE
1005 * increase of timer interrupts!
1006 */
1007 if ((bus_irq == 0) && (trigger == 3))
1008 trigger = 1;
1009
1010 mp_irq.mp_type = MP_INTSRC;
1011 mp_irq.mp_irqtype = mp_INT;
1012 mp_irq.mp_irqflag = (trigger << 2) | polarity;
1013 mp_irq.mp_srcbus = MP_ISA_BUS;
1014 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
1015 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1016 mp_irq.mp_dstirq = pin; /* INTIN# */
1017
1018 save_mp_irq(&mp_irq);
1019 }
1020
1021 void __init mp_config_acpi_legacy_irqs(void)
1022 {
1023 int i;
1024 int ioapic;
1025 unsigned int dstapic;
1026 struct mp_config_intsrc mp_irq;
1027
1028 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1029 /*
1030 * Fabricate the legacy ISA bus (bus #31).
1031 */
1032 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1033 #endif
1034 set_bit(MP_ISA_BUS, mp_bus_not_pci);
1035 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1036
1037 #ifdef CONFIG_X86_ES7000
1038 /*
1039 * Older generations of ES7000 have no legacy identity mappings
1040 */
1041 if (es7000_plat == 1)
1042 return;
1043 #endif
1044
1045 /*
1046 * Locate the IOAPIC that manages the ISA IRQs (0-15).
1047 */
1048 ioapic = mp_find_ioapic(0);
1049 if (ioapic < 0)
1050 return;
1051 dstapic = mp_ioapics[ioapic].mp_apicid;
1052
1053 /*
1054 * Use the default configuration for the IRQs 0-15. Unless
1055 * overridden by (MADT) interrupt source override entries.
1056 */
1057 for (i = 0; i < 16; i++) {
1058 int idx;
1059
1060 for (idx = 0; idx < mp_irq_entries; idx++) {
1061 struct mp_config_intsrc *irq = mp_irqs + idx;
1062
1063 /* Do we already have a mapping for this ISA IRQ? */
1064 if (irq->mp_srcbus == MP_ISA_BUS
1065 && irq->mp_srcbusirq == i)
1066 break;
1067
1068 /* Do we already have a mapping for this IOAPIC pin */
1069 if (irq->mp_dstapic == dstapic &&
1070 irq->mp_dstirq == i)
1071 break;
1072 }
1073
1074 if (idx != mp_irq_entries) {
1075 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1076 continue; /* IRQ already used */
1077 }
1078
1079 mp_irq.mp_type = MP_INTSRC;
1080 mp_irq.mp_irqflag = 0; /* Conforming */
1081 mp_irq.mp_srcbus = MP_ISA_BUS;
1082 mp_irq.mp_dstapic = dstapic;
1083 mp_irq.mp_irqtype = mp_INT;
1084 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1085 mp_irq.mp_dstirq = i;
1086
1087 save_mp_irq(&mp_irq);
1088 }
1089 }
1090
1091 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1092 {
1093 int ioapic;
1094 int ioapic_pin;
1095 #ifdef CONFIG_X86_32
1096 #define MAX_GSI_NUM 4096
1097 #define IRQ_COMPRESSION_START 64
1098
1099 static int pci_irq = IRQ_COMPRESSION_START;
1100 /*
1101 * Mapping between Global System Interrupts, which
1102 * represent all possible interrupts, and IRQs
1103 * assigned to actual devices.
1104 */
1105 static int gsi_to_irq[MAX_GSI_NUM];
1106 #else
1107
1108 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1109 return gsi;
1110 #endif
1111
1112 /* Don't set up the ACPI SCI because it's already set up */
1113 if (acpi_gbl_FADT.sci_interrupt == gsi)
1114 return gsi;
1115
1116 ioapic = mp_find_ioapic(gsi);
1117 if (ioapic < 0) {
1118 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1119 return gsi;
1120 }
1121
1122 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1123
1124 #ifdef CONFIG_X86_32
1125 if (ioapic_renumber_irq)
1126 gsi = ioapic_renumber_irq(ioapic, gsi);
1127 #endif
1128
1129 /*
1130 * Avoid pin reprogramming. PRTs typically include entries
1131 * with redundant pin->gsi mappings (but unique PCI devices);
1132 * we only program the IOAPIC on the first.
1133 */
1134 if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1135 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1136 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1137 ioapic_pin);
1138 return gsi;
1139 }
1140 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1141 pr_debug("Pin %d-%d already programmed\n",
1142 mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1143 #ifdef CONFIG_X86_32
1144 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1145 #else
1146 return gsi;
1147 #endif
1148 }
1149
1150 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1151 #ifdef CONFIG_X86_32
1152 /*
1153 * For GSI >= 64, use IRQ compression
1154 */
1155 if ((gsi >= IRQ_COMPRESSION_START)
1156 && (triggering == ACPI_LEVEL_SENSITIVE)) {
1157 /*
1158 * For PCI devices assign IRQs in order, avoiding gaps
1159 * due to unused I/O APIC pins.
1160 */
1161 int irq = gsi;
1162 if (gsi < MAX_GSI_NUM) {
1163 /*
1164 * Retain the VIA chipset work-around (gsi > 15), but
1165 * avoid a problem where the 8254 timer (IRQ0) is setup
1166 * via an override (so it's not on pin 0 of the ioapic),
1167 * and at the same time, the pin 0 interrupt is a PCI
1168 * type. The gsi > 15 test could cause these two pins
1169 * to be shared as IRQ0, and they are not shareable.
1170 * So test for this condition, and if necessary, avoid
1171 * the pin collision.
1172 */
1173 gsi = pci_irq++;
1174 /*
1175 * Don't assign IRQ used by ACPI SCI
1176 */
1177 if (gsi == acpi_gbl_FADT.sci_interrupt)
1178 gsi = pci_irq++;
1179 gsi_to_irq[irq] = gsi;
1180 } else {
1181 printk(KERN_ERR "GSI %u is too high\n", gsi);
1182 return gsi;
1183 }
1184 }
1185 #endif
1186 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1187 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1188 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1189 return gsi;
1190 }
1191
1192 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1193 u32 gsi, int triggering, int polarity)
1194 {
1195 #ifdef CONFIG_X86_MPPARSE
1196 struct mp_config_intsrc mp_irq;
1197 int ioapic;
1198
1199 if (!acpi_ioapic)
1200 return 0;
1201
1202 /* print the entry should happen on mptable identically */
1203 mp_irq.mp_type = MP_INTSRC;
1204 mp_irq.mp_irqtype = mp_INT;
1205 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1206 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1207 mp_irq.mp_srcbus = number;
1208 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1209 ioapic = mp_find_ioapic(gsi);
1210 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1211 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1212
1213 save_mp_irq(&mp_irq);
1214 #endif
1215 return 0;
1216 }
1217
1218 /*
1219 * Parse IOAPIC related entries in MADT
1220 * returns 0 on success, < 0 on error
1221 */
1222 static int __init acpi_parse_madt_ioapic_entries(void)
1223 {
1224 int count;
1225
1226 /*
1227 * ACPI interpreter is required to complete interrupt setup,
1228 * so if it is off, don't enumerate the io-apics with ACPI.
1229 * If MPS is present, it will handle them,
1230 * otherwise the system will stay in PIC mode
1231 */
1232 if (acpi_disabled || acpi_noirq) {
1233 return -ENODEV;
1234 }
1235
1236 if (!cpu_has_apic)
1237 return -ENODEV;
1238
1239 /*
1240 * if "noapic" boot option, don't look for IO-APICs
1241 */
1242 if (skip_ioapic_setup) {
1243 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1244 "due to 'noapic' option.\n");
1245 return -ENODEV;
1246 }
1247
1248 count =
1249 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1250 MAX_IO_APICS);
1251 if (!count) {
1252 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1253 return -ENODEV;
1254 } else if (count < 0) {
1255 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1256 return count;
1257 }
1258
1259 count =
1260 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1261 nr_irqs);
1262 if (count < 0) {
1263 printk(KERN_ERR PREFIX
1264 "Error parsing interrupt source overrides entry\n");
1265 /* TBD: Cleanup to allow fallback to MPS */
1266 return count;
1267 }
1268
1269 /*
1270 * If BIOS did not supply an INT_SRC_OVR for the SCI
1271 * pretend we got one so we can set the SCI flags.
1272 */
1273 if (!acpi_sci_override_gsi)
1274 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1275
1276 /* Fill in identity legacy mapings where no override */
1277 mp_config_acpi_legacy_irqs();
1278
1279 count =
1280 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1281 nr_irqs);
1282 if (count < 0) {
1283 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1284 /* TBD: Cleanup to allow fallback to MPS */
1285 return count;
1286 }
1287
1288 return 0;
1289 }
1290 #else
1291 static inline int acpi_parse_madt_ioapic_entries(void)
1292 {
1293 return -1;
1294 }
1295 #endif /* !CONFIG_X86_IO_APIC */
1296
1297 static void __init early_acpi_process_madt(void)
1298 {
1299 #ifdef CONFIG_X86_LOCAL_APIC
1300 int error;
1301
1302 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1303
1304 /*
1305 * Parse MADT LAPIC entries
1306 */
1307 error = early_acpi_parse_madt_lapic_addr_ovr();
1308 if (!error) {
1309 acpi_lapic = 1;
1310 smp_found_config = 1;
1311 }
1312 if (error == -EINVAL) {
1313 /*
1314 * Dell Precision Workstation 410, 610 come here.
1315 */
1316 printk(KERN_ERR PREFIX
1317 "Invalid BIOS MADT, disabling ACPI\n");
1318 disable_acpi();
1319 }
1320 }
1321 #endif
1322 }
1323
1324 static void __init acpi_process_madt(void)
1325 {
1326 #ifdef CONFIG_X86_LOCAL_APIC
1327 int error;
1328
1329 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1330
1331 /*
1332 * Parse MADT LAPIC entries
1333 */
1334 error = acpi_parse_madt_lapic_entries();
1335 if (!error) {
1336 acpi_lapic = 1;
1337
1338 #ifdef CONFIG_X86_GENERICARCH
1339 generic_bigsmp_probe();
1340 #endif
1341 /*
1342 * Parse MADT IO-APIC entries
1343 */
1344 error = acpi_parse_madt_ioapic_entries();
1345 if (!error) {
1346 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1347 acpi_ioapic = 1;
1348
1349 smp_found_config = 1;
1350 #ifdef CONFIG_X86_32
1351 setup_apic_routing();
1352 #endif
1353 }
1354 }
1355 if (error == -EINVAL) {
1356 /*
1357 * Dell Precision Workstation 410, 610 come here.
1358 */
1359 printk(KERN_ERR PREFIX
1360 "Invalid BIOS MADT, disabling ACPI\n");
1361 disable_acpi();
1362 }
1363 } else {
1364 /*
1365 * ACPI found no MADT, and so ACPI wants UP PIC mode.
1366 * In the event an MPS table was found, forget it.
1367 * Boot with "acpi=off" to use MPS on such a system.
1368 */
1369 if (smp_found_config) {
1370 printk(KERN_WARNING PREFIX
1371 "No APIC-table, disabling MPS\n");
1372 smp_found_config = 0;
1373 }
1374 }
1375
1376 /*
1377 * ACPI supports both logical (e.g. Hyper-Threading) and physical
1378 * processors, where MPS only supports physical.
1379 */
1380 if (acpi_lapic && acpi_ioapic)
1381 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1382 "information\n");
1383 else if (acpi_lapic)
1384 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1385 "configuration information\n");
1386 #endif
1387 return;
1388 }
1389
1390 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1391 {
1392 if (!acpi_force) {
1393 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1394 d->ident);
1395 acpi_noirq_set();
1396 }
1397 return 0;
1398 }
1399
1400 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1401 {
1402 if (!acpi_force) {
1403 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1404 d->ident);
1405 acpi_disable_pci();
1406 }
1407 return 0;
1408 }
1409
1410 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1411 {
1412 if (!acpi_force) {
1413 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1414 disable_acpi();
1415 } else {
1416 printk(KERN_NOTICE
1417 "Warning: DMI blacklist says broken, but acpi forced\n");
1418 }
1419 return 0;
1420 }
1421
1422 /*
1423 * Limit ACPI to CPU enumeration for HT
1424 */
1425 static int __init force_acpi_ht(const struct dmi_system_id *d)
1426 {
1427 if (!acpi_force) {
1428 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1429 d->ident);
1430 disable_acpi();
1431 acpi_ht = 1;
1432 } else {
1433 printk(KERN_NOTICE
1434 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1435 }
1436 return 0;
1437 }
1438
1439 /*
1440 * Force ignoring BIOS IRQ0 pin2 override
1441 */
1442 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1443 {
1444 /*
1445 * The ati_ixp4x0_rev() early PCI quirk should have set
1446 * the acpi_skip_timer_override flag already:
1447 */
1448 if (!acpi_skip_timer_override) {
1449 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1450 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1451 d->ident);
1452 acpi_skip_timer_override = 1;
1453 }
1454 return 0;
1455 }
1456
1457 /*
1458 * If your system is blacklisted here, but you find that acpi=force
1459 * works for you, please contact acpi-devel@sourceforge.net
1460 */
1461 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1462 /*
1463 * Boxes that need ACPI disabled
1464 */
1465 {
1466 .callback = dmi_disable_acpi,
1467 .ident = "IBM Thinkpad",
1468 .matches = {
1469 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1470 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1471 },
1472 },
1473
1474 /*
1475 * Boxes that need acpi=ht
1476 */
1477 {
1478 .callback = force_acpi_ht,
1479 .ident = "FSC Primergy T850",
1480 .matches = {
1481 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1482 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1483 },
1484 },
1485 {
1486 .callback = force_acpi_ht,
1487 .ident = "HP VISUALIZE NT Workstation",
1488 .matches = {
1489 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1490 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1491 },
1492 },
1493 {
1494 .callback = force_acpi_ht,
1495 .ident = "Compaq Workstation W8000",
1496 .matches = {
1497 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1498 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1499 },
1500 },
1501 {
1502 .callback = force_acpi_ht,
1503 .ident = "ASUS P4B266",
1504 .matches = {
1505 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1506 DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1507 },
1508 },
1509 {
1510 .callback = force_acpi_ht,
1511 .ident = "ASUS P2B-DS",
1512 .matches = {
1513 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1514 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1515 },
1516 },
1517 {
1518 .callback = force_acpi_ht,
1519 .ident = "ASUS CUR-DLS",
1520 .matches = {
1521 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1522 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1523 },
1524 },
1525 {
1526 .callback = force_acpi_ht,
1527 .ident = "ABIT i440BX-W83977",
1528 .matches = {
1529 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1530 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1531 },
1532 },
1533 {
1534 .callback = force_acpi_ht,
1535 .ident = "IBM Bladecenter",
1536 .matches = {
1537 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1538 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1539 },
1540 },
1541 {
1542 .callback = force_acpi_ht,
1543 .ident = "IBM eServer xSeries 360",
1544 .matches = {
1545 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1546 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1547 },
1548 },
1549 {
1550 .callback = force_acpi_ht,
1551 .ident = "IBM eserver xSeries 330",
1552 .matches = {
1553 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1554 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1555 },
1556 },
1557 {
1558 .callback = force_acpi_ht,
1559 .ident = "IBM eserver xSeries 440",
1560 .matches = {
1561 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1562 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1563 },
1564 },
1565
1566 /*
1567 * Boxes that need ACPI PCI IRQ routing disabled
1568 */
1569 {
1570 .callback = disable_acpi_irq,
1571 .ident = "ASUS A7V",
1572 .matches = {
1573 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1574 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1575 /* newer BIOS, Revision 1011, does work */
1576 DMI_MATCH(DMI_BIOS_VERSION,
1577 "ASUS A7V ACPI BIOS Revision 1007"),
1578 },
1579 },
1580 {
1581 /*
1582 * Latest BIOS for IBM 600E (1.16) has bad pcinum
1583 * for LPC bridge, which is needed for the PCI
1584 * interrupt links to work. DSDT fix is in bug 5966.
1585 * 2645, 2646 model numbers are shared with 600/600E/600X
1586 */
1587 .callback = disable_acpi_irq,
1588 .ident = "IBM Thinkpad 600 Series 2645",
1589 .matches = {
1590 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1591 DMI_MATCH(DMI_BOARD_NAME, "2645"),
1592 },
1593 },
1594 {
1595 .callback = disable_acpi_irq,
1596 .ident = "IBM Thinkpad 600 Series 2646",
1597 .matches = {
1598 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1599 DMI_MATCH(DMI_BOARD_NAME, "2646"),
1600 },
1601 },
1602 /*
1603 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1604 */
1605 { /* _BBN 0 bug */
1606 .callback = disable_acpi_pci,
1607 .ident = "ASUS PR-DLS",
1608 .matches = {
1609 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1610 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1611 DMI_MATCH(DMI_BIOS_VERSION,
1612 "ASUS PR-DLS ACPI BIOS Revision 1010"),
1613 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1614 },
1615 },
1616 {
1617 .callback = disable_acpi_pci,
1618 .ident = "Acer TravelMate 36x Laptop",
1619 .matches = {
1620 DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1621 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1622 },
1623 },
1624 {}
1625 };
1626
1627 /* second table for DMI checks that should run after early-quirks */
1628 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1629 /*
1630 * HP laptops which use a DSDT reporting as HP/SB400/10000,
1631 * which includes some code which overrides all temperature
1632 * trip points to 16C if the INTIN2 input of the I/O APIC
1633 * is enabled. This input is incorrectly designated the
1634 * ISA IRQ 0 via an interrupt source override even though
1635 * it is wired to the output of the master 8259A and INTIN0
1636 * is not connected at all. Force ignoring BIOS IRQ0 pin2
1637 * override in that cases.
1638 */
1639 {
1640 .callback = dmi_ignore_irq0_timer_override,
1641 .ident = "HP nx6115 laptop",
1642 .matches = {
1643 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1644 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1645 },
1646 },
1647 {
1648 .callback = dmi_ignore_irq0_timer_override,
1649 .ident = "HP NX6125 laptop",
1650 .matches = {
1651 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1652 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1653 },
1654 },
1655 {
1656 .callback = dmi_ignore_irq0_timer_override,
1657 .ident = "HP NX6325 laptop",
1658 .matches = {
1659 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1660 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1661 },
1662 },
1663 {
1664 .callback = dmi_ignore_irq0_timer_override,
1665 .ident = "HP 6715b laptop",
1666 .matches = {
1667 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1668 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1669 },
1670 },
1671 {}
1672 };
1673
1674 /*
1675 * acpi_boot_table_init() and acpi_boot_init()
1676 * called from setup_arch(), always.
1677 * 1. checksums all tables
1678 * 2. enumerates lapics
1679 * 3. enumerates io-apics
1680 *
1681 * acpi_table_init() is separate to allow reading SRAT without
1682 * other side effects.
1683 *
1684 * side effects of acpi_boot_init:
1685 * acpi_lapic = 1 if LAPIC found
1686 * acpi_ioapic = 1 if IOAPIC found
1687 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1688 * if acpi_blacklisted() acpi_disabled = 1;
1689 * acpi_irq_model=...
1690 * ...
1691 *
1692 * return value: (currently ignored)
1693 * 0: success
1694 * !0: failure
1695 */
1696
1697 int __init acpi_boot_table_init(void)
1698 {
1699 int error;
1700
1701 dmi_check_system(acpi_dmi_table);
1702
1703 /*
1704 * If acpi_disabled, bail out
1705 * One exception: acpi=ht continues far enough to enumerate LAPICs
1706 */
1707 if (acpi_disabled && !acpi_ht)
1708 return 1;
1709
1710 /*
1711 * Initialize the ACPI boot-time table parser.
1712 */
1713 error = acpi_table_init();
1714 if (error) {
1715 disable_acpi();
1716 return error;
1717 }
1718
1719 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1720
1721 /*
1722 * blacklist may disable ACPI entirely
1723 */
1724 error = acpi_blacklisted();
1725 if (error) {
1726 if (acpi_force) {
1727 printk(KERN_WARNING PREFIX "acpi=force override\n");
1728 } else {
1729 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1730 disable_acpi();
1731 return error;
1732 }
1733 }
1734
1735 return 0;
1736 }
1737
1738 int __init early_acpi_boot_init(void)
1739 {
1740 /*
1741 * If acpi_disabled, bail out
1742 * One exception: acpi=ht continues far enough to enumerate LAPICs
1743 */
1744 if (acpi_disabled && !acpi_ht)
1745 return 1;
1746
1747 /*
1748 * Process the Multiple APIC Description Table (MADT), if present
1749 */
1750 early_acpi_process_madt();
1751
1752 return 0;
1753 }
1754
1755 int __init acpi_boot_init(void)
1756 {
1757 /* those are executed after early-quirks are executed */
1758 dmi_check_system(acpi_dmi_table_late);
1759
1760 /*
1761 * If acpi_disabled, bail out
1762 * One exception: acpi=ht continues far enough to enumerate LAPICs
1763 */
1764 if (acpi_disabled && !acpi_ht)
1765 return 1;
1766
1767 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1768
1769 /*
1770 * set sci_int and PM timer address
1771 */
1772 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1773
1774 /*
1775 * Process the Multiple APIC Description Table (MADT), if present
1776 */
1777 acpi_process_madt();
1778
1779 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1780
1781 return 0;
1782 }
1783
1784 static int __init parse_acpi(char *arg)
1785 {
1786 if (!arg)
1787 return -EINVAL;
1788
1789 /* "acpi=off" disables both ACPI table parsing and interpreter */
1790 if (strcmp(arg, "off") == 0) {
1791 disable_acpi();
1792 }
1793 /* acpi=force to over-ride black-list */
1794 else if (strcmp(arg, "force") == 0) {
1795 acpi_force = 1;
1796 acpi_ht = 1;
1797 acpi_disabled = 0;
1798 }
1799 /* acpi=strict disables out-of-spec workarounds */
1800 else if (strcmp(arg, "strict") == 0) {
1801 acpi_strict = 1;
1802 }
1803 /* Limit ACPI just to boot-time to enable HT */
1804 else if (strcmp(arg, "ht") == 0) {
1805 if (!acpi_force)
1806 disable_acpi();
1807 acpi_ht = 1;
1808 }
1809 /* acpi=rsdt use RSDT instead of XSDT */
1810 else if (strcmp(arg, "rsdt") == 0) {
1811 acpi_rsdt_forced = 1;
1812 }
1813 /* "acpi=noirq" disables ACPI interrupt routing */
1814 else if (strcmp(arg, "noirq") == 0) {
1815 acpi_noirq_set();
1816 } else {
1817 /* Core will printk when we return error. */
1818 return -EINVAL;
1819 }
1820 return 0;
1821 }
1822 early_param("acpi", parse_acpi);
1823
1824 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1825 static int __init parse_pci(char *arg)
1826 {
1827 if (arg && strcmp(arg, "noacpi") == 0)
1828 acpi_disable_pci();
1829 return 0;
1830 }
1831 early_param("pci", parse_pci);
1832
1833 int __init acpi_mps_check(void)
1834 {
1835 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1836 /* mptable code is not built-in*/
1837 if (acpi_disabled || acpi_noirq) {
1838 printk(KERN_WARNING "MPS support code is not built-in.\n"
1839 "Using acpi=off or acpi=noirq or pci=noacpi "
1840 "may have problem\n");
1841 return 1;
1842 }
1843 #endif
1844 return 0;
1845 }
1846
1847 #ifdef CONFIG_X86_IO_APIC
1848 static int __init parse_acpi_skip_timer_override(char *arg)
1849 {
1850 acpi_skip_timer_override = 1;
1851 return 0;
1852 }
1853 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1854
1855 static int __init parse_acpi_use_timer_override(char *arg)
1856 {
1857 acpi_use_timer_override = 1;
1858 return 0;
1859 }
1860 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1861 #endif /* CONFIG_X86_IO_APIC */
1862
1863 static int __init setup_acpi_sci(char *s)
1864 {
1865 if (!s)
1866 return -EINVAL;
1867 if (!strcmp(s, "edge"))
1868 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE |
1869 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1870 else if (!strcmp(s, "level"))
1871 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1872 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1873 else if (!strcmp(s, "high"))
1874 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1875 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1876 else if (!strcmp(s, "low"))
1877 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1878 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1879 else
1880 return -EINVAL;
1881 return 0;
1882 }
1883 early_param("acpi_sci", setup_acpi_sci);
1884
1885 int __acpi_acquire_global_lock(unsigned int *lock)
1886 {
1887 unsigned int old, new, val;
1888 do {
1889 old = *lock;
1890 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1891 val = cmpxchg(lock, old, new);
1892 } while (unlikely (val != old));
1893 return (new < 3) ? -1 : 0;
1894 }
1895
1896 int __acpi_release_global_lock(unsigned int *lock)
1897 {
1898 unsigned int old, new, val;
1899 do {
1900 old = *lock;
1901 new = old & ~0x3;
1902 val = cmpxchg(lock, old, new);
1903 } while (unlikely (val != old));
1904 return old & 0x1;
1905 }
x86 "subsystem" repository