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/config.h>
28 #include <linux/acpi.h>
29 #include <linux/efi.h>
30 #include <linux/irq.h>
31 #include <linux/module.h>
32
33 #include <asm/pgtable.h>
34 #include <asm/io_apic.h>
35 #include <asm/apic.h>
36 #include <asm/io.h>
37 #include <asm/irq.h>
38 #include <asm/mpspec.h>
39
40 #ifdef CONFIG_X86_64
41
42 static inline void acpi_madt_oem_check(char *oem_id, char *oem_table_id) { }
43 extern void __init clustered_apic_check(void);
44 static inline int ioapic_setup_disabled(void) { return 0; }
45 #include <asm/proto.h>
46
47 #else /* X86 */
48
49 #ifdef CONFIG_X86_LOCAL_APIC
50 #include <mach_apic.h>
51 #include <mach_mpparse.h>
52 #endif /* CONFIG_X86_LOCAL_APIC */
53
54 #endif /* X86 */
55
56 #define BAD_MADT_ENTRY(entry, end) ( \
57 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \
58 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
59
60 #define PREFIX "ACPI: "
61
62 #ifdef CONFIG_ACPI_PCI
63 int acpi_noirq __initdata; /* skip ACPI IRQ initialization */
64 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
65 #else
66 int acpi_noirq __initdata = 1;
67 int acpi_pci_disabled __initdata = 1;
68 #endif
69 int acpi_ht __initdata = 1; /* enable HT */
70
71 int acpi_lapic;
72 int acpi_ioapic;
73 int acpi_strict;
74 EXPORT_SYMBOL(acpi_strict);
75
76 acpi_interrupt_flags acpi_sci_flags __initdata;
77 int acpi_sci_override_gsi __initdata;
78 int acpi_skip_timer_override __initdata;
79
80 #ifdef CONFIG_X86_LOCAL_APIC
81 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
82 #endif
83
84 #ifndef __HAVE_ARCH_CMPXCHG
85 #warning ACPI uses CMPXCHG, i486 and later hardware
86 #endif
87
88 #define MAX_MADT_ENTRIES 256
89 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
90 { [0 ... MAX_MADT_ENTRIES-1] = 0xff };
91 EXPORT_SYMBOL(x86_acpiid_to_apicid);
92
93 /* --------------------------------------------------------------------------
94 Boot-time Configuration
95 -------------------------------------------------------------------------- */
96
97 /*
98 * The default interrupt routing model is PIC (8259). This gets
99 * overriden if IOAPICs are enumerated (below).
100 */
101 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
102
103 #ifdef CONFIG_X86_64
104
105 /* rely on all ACPI tables being in the direct mapping */
106 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
107 {
108 if (!phys_addr || !size)
109 return NULL;
110
111 if (phys_addr < (end_pfn_map << PAGE_SHIFT))
112 return __va(phys_addr);
113
114 return NULL;
115 }
116
117 #else
118
119 /*
120 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
121 * to map the target physical address. The problem is that set_fixmap()
122 * provides a single page, and it is possible that the page is not
123 * sufficient.
124 * By using this area, we can map up to MAX_IO_APICS pages temporarily,
125 * i.e. until the next __va_range() call.
126 *
127 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted*
128 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and
129 * count idx down while incrementing the phys address.
130 */
131 char *__acpi_map_table(unsigned long phys, unsigned long size)
132 {
133 unsigned long base, offset, mapped_size;
134 int idx;
135
136 if (phys + size < 8*1024*1024)
137 return __va(phys);
138
139 offset = phys & (PAGE_SIZE - 1);
140 mapped_size = PAGE_SIZE - offset;
141 set_fixmap(FIX_ACPI_END, phys);
142 base = fix_to_virt(FIX_ACPI_END);
143
144 /*
145 * Most cases can be covered by the below.
146 */
147 idx = FIX_ACPI_END;
148 while (mapped_size < size) {
149 if (--idx < FIX_ACPI_BEGIN)
150 return NULL; /* cannot handle this */
151 phys += PAGE_SIZE;
152 set_fixmap(idx, phys);
153 mapped_size += PAGE_SIZE;
154 }
155
156 return ((unsigned char *) base + offset);
157 }
158 #endif
159
160 #ifdef CONFIG_PCI_MMCONFIG
161 static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
162 {
163 struct acpi_table_mcfg *mcfg;
164
165 if (!phys_addr || !size)
166 return -EINVAL;
167
168 mcfg = (struct acpi_table_mcfg *) __acpi_map_table(phys_addr, size);
169 if (!mcfg) {
170 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
171 return -ENODEV;
172 }
173
174 if (mcfg->base_reserved) {
175 printk(KERN_ERR PREFIX "MMCONFIG not in low 4GB of memory\n");
176 return -ENODEV;
177 }
178
179 pci_mmcfg_base_addr = mcfg->base_address;
180
181 return 0;
182 }
183 #else
184 #define acpi_parse_mcfg NULL
185 #endif /* !CONFIG_PCI_MMCONFIG */
186
187 #ifdef CONFIG_X86_LOCAL_APIC
188 static int __init
189 acpi_parse_madt (
190 unsigned long phys_addr,
191 unsigned long size)
192 {
193 struct acpi_table_madt *madt = NULL;
194
195 if (!phys_addr || !size)
196 return -EINVAL;
197
198 madt = (struct acpi_table_madt *) __acpi_map_table(phys_addr, size);
199 if (!madt) {
200 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
201 return -ENODEV;
202 }
203
204 if (madt->lapic_address) {
205 acpi_lapic_addr = (u64) madt->lapic_address;
206
207 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
208 madt->lapic_address);
209 }
210
211 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
212
213 return 0;
214 }
215
216
217 static int __init
218 acpi_parse_lapic (
219 acpi_table_entry_header *header, const unsigned long end)
220 {
221 struct acpi_table_lapic *processor = NULL;
222
223 processor = (struct acpi_table_lapic*) header;
224
225 if (BAD_MADT_ENTRY(processor, end))
226 return -EINVAL;
227
228 acpi_table_print_madt_entry(header);
229
230 /* no utility in registering a disabled processor */
231 if (processor->flags.enabled == 0)
232 return 0;
233
234 x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
235
236 mp_register_lapic (
237 processor->id, /* APIC ID */
238 processor->flags.enabled); /* Enabled? */
239
240 return 0;
241 }
242
243 static int __init
244 acpi_parse_lapic_addr_ovr (
245 acpi_table_entry_header *header, const unsigned long end)
246 {
247 struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
248
249 lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr*) header;
250
251 if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
252 return -EINVAL;
253
254 acpi_lapic_addr = lapic_addr_ovr->address;
255
256 return 0;
257 }
258
259 static int __init
260 acpi_parse_lapic_nmi (
261 acpi_table_entry_header *header, const unsigned long end)
262 {
263 struct acpi_table_lapic_nmi *lapic_nmi = NULL;
264
265 lapic_nmi = (struct acpi_table_lapic_nmi*) header;
266
267 if (BAD_MADT_ENTRY(lapic_nmi, end))
268 return -EINVAL;
269
270 acpi_table_print_madt_entry(header);
271
272 if (lapic_nmi->lint != 1)
273 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
274
275 return 0;
276 }
277
278
279 #endif /*CONFIG_X86_LOCAL_APIC*/
280
281 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
282
283 static int __init
284 acpi_parse_ioapic (
285 acpi_table_entry_header *header, const unsigned long end)
286 {
287 struct acpi_table_ioapic *ioapic = NULL;
288
289 ioapic = (struct acpi_table_ioapic*) header;
290
291 if (BAD_MADT_ENTRY(ioapic, end))
292 return -EINVAL;
293
294 acpi_table_print_madt_entry(header);
295
296 mp_register_ioapic (
297 ioapic->id,
298 ioapic->address,
299 ioapic->global_irq_base);
300
301 return 0;
302 }
303
304 /*
305 * Parse Interrupt Source Override for the ACPI SCI
306 */
307 static void
308 acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
309 {
310 if (trigger == 0) /* compatible SCI trigger is level */
311 trigger = 3;
312
313 if (polarity == 0) /* compatible SCI polarity is low */
314 polarity = 3;
315
316 /* Command-line over-ride via acpi_sci= */
317 if (acpi_sci_flags.trigger)
318 trigger = acpi_sci_flags.trigger;
319
320 if (acpi_sci_flags.polarity)
321 polarity = acpi_sci_flags.polarity;
322
323 /*
324 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
325 * If GSI is < 16, this will update its flags,
326 * else it will create a new mp_irqs[] entry.
327 */
328 mp_override_legacy_irq(gsi, polarity, trigger, gsi);
329
330 /*
331 * stash over-ride to indicate we've been here
332 * and for later update of acpi_fadt
333 */
334 acpi_sci_override_gsi = gsi;
335 return;
336 }
337
338 static int __init
339 acpi_parse_int_src_ovr (
340 acpi_table_entry_header *header, const unsigned long end)
341 {
342 struct acpi_table_int_src_ovr *intsrc = NULL;
343
344 intsrc = (struct acpi_table_int_src_ovr*) header;
345
346 if (BAD_MADT_ENTRY(intsrc, end))
347 return -EINVAL;
348
349 acpi_table_print_madt_entry(header);
350
351 if (intsrc->bus_irq == acpi_fadt.sci_int) {
352 acpi_sci_ioapic_setup(intsrc->global_irq,
353 intsrc->flags.polarity, intsrc->flags.trigger);
354 return 0;
355 }
356
357 if (acpi_skip_timer_override &&
358 intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
359 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
360 return 0;
361 }
362
363 mp_override_legacy_irq (
364 intsrc->bus_irq,
365 intsrc->flags.polarity,
366 intsrc->flags.trigger,
367 intsrc->global_irq);
368
369 return 0;
370 }
371
372
373 static int __init
374 acpi_parse_nmi_src (
375 acpi_table_entry_header *header, const unsigned long end)
376 {
377 struct acpi_table_nmi_src *nmi_src = NULL;
378
379 nmi_src = (struct acpi_table_nmi_src*) header;
380
381 if (BAD_MADT_ENTRY(nmi_src, end))
382 return -EINVAL;
383
384 acpi_table_print_madt_entry(header);
385
386 /* TBD: Support nimsrc entries? */
387
388 return 0;
389 }
390
391 #endif /* CONFIG_X86_IO_APIC */
392
393 #ifdef CONFIG_ACPI_BUS
394
395 /*
396 * acpi_pic_sci_set_trigger()
397 *
398 * use ELCR to set PIC-mode trigger type for SCI
399 *
400 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
401 * it may require Edge Trigger -- use "acpi_sci=edge"
402 *
403 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
404 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
405 * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
406 * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
407 */
408
409 void __init
410 acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
411 {
412 unsigned int mask = 1 << irq;
413 unsigned int old, new;
414
415 /* Real old ELCR mask */
416 old = inb(0x4d0) | (inb(0x4d1) << 8);
417
418 /*
419 * If we use ACPI to set PCI irq's, then we should clear ELCR
420 * since we will set it correctly as we enable the PCI irq
421 * routing.
422 */
423 new = acpi_noirq ? old : 0;
424
425 /*
426 * Update SCI information in the ELCR, it isn't in the PCI
427 * routing tables..
428 */
429 switch (trigger) {
430 case 1: /* Edge - clear */
431 new &= ~mask;
432 break;
433 case 3: /* Level - set */
434 new |= mask;
435 break;
436 }
437
438 if (old == new)
439 return;
440
441 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
442 outb(new, 0x4d0);
443 outb(new >> 8, 0x4d1);
444 }
445
446
447 #endif /* CONFIG_ACPI_BUS */
448
449 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
450 {
451 #ifdef CONFIG_X86_IO_APIC
452 if (use_pci_vector() && !platform_legacy_irq(gsi))
453 *irq = IO_APIC_VECTOR(gsi);
454 else
455 #endif
456 *irq = gsi;
457 return 0;
458 }
459
460 unsigned int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
461 {
462 unsigned int irq;
463 unsigned int plat_gsi = gsi;
464
465 #ifdef CONFIG_PCI
466 /*
467 * Make sure all (legacy) PCI IRQs are set as level-triggered.
468 */
469 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
470 extern void eisa_set_level_irq(unsigned int irq);
471
472 if (edge_level == ACPI_LEVEL_SENSITIVE)
473 eisa_set_level_irq(gsi);
474 }
475 #endif
476
477 #ifdef CONFIG_X86_IO_APIC
478 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
479 plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
480 }
481 #endif
482 acpi_gsi_to_irq(plat_gsi, &irq);
483 return irq;
484 }
485 EXPORT_SYMBOL(acpi_register_gsi);
486
487 /*
488 * ACPI based hotplug support for CPU
489 */
490 #ifdef CONFIG_ACPI_HOTPLUG_CPU
491 int
492 acpi_map_lsapic(acpi_handle handle, int *pcpu)
493 {
494 /* TBD */
495 return -EINVAL;
496 }
497 EXPORT_SYMBOL(acpi_map_lsapic);
498
499
500 int
501 acpi_unmap_lsapic(int cpu)
502 {
503 /* TBD */
504 return -EINVAL;
505 }
506 EXPORT_SYMBOL(acpi_unmap_lsapic);
507 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
508
509 static unsigned long __init
510 acpi_scan_rsdp (
511 unsigned long start,
512 unsigned long length)
513 {
514 unsigned long offset = 0;
515 unsigned long sig_len = sizeof("RSD PTR ") - 1;
516
517 /*
518 * Scan all 16-byte boundaries of the physical memory region for the
519 * RSDP signature.
520 */
521 for (offset = 0; offset < length; offset += 16) {
522 if (strncmp((char *) (start + offset), "RSD PTR ", sig_len))
523 continue;
524 return (start + offset);
525 }
526
527 return 0;
528 }
529
530 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
531 {
532 struct acpi_table_sbf *sb;
533
534 if (!phys_addr || !size)
535 return -EINVAL;
536
537 sb = (struct acpi_table_sbf *) __acpi_map_table(phys_addr, size);
538 if (!sb) {
539 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
540 return -ENODEV;
541 }
542
543 sbf_port = sb->sbf_cmos; /* Save CMOS port */
544
545 return 0;
546 }
547
548
549 #ifdef CONFIG_HPET_TIMER
550
551 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
552 {
553 struct acpi_table_hpet *hpet_tbl;
554
555 if (!phys || !size)
556 return -EINVAL;
557
558 hpet_tbl = (struct acpi_table_hpet *) __acpi_map_table(phys, size);
559 if (!hpet_tbl) {
560 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
561 return -ENODEV;
562 }
563
564 if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
565 printk(KERN_WARNING PREFIX "HPET timers must be located in "
566 "memory.\n");
567 return -1;
568 }
569
570 #ifdef CONFIG_X86_64
571 vxtime.hpet_address = hpet_tbl->addr.addrl |
572 ((long) hpet_tbl->addr.addrh << 32);
573
574 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
575 hpet_tbl->id, vxtime.hpet_address);
576 #else /* X86 */
577 {
578 extern unsigned long hpet_address;
579
580 hpet_address = hpet_tbl->addr.addrl;
581 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
582 hpet_tbl->id, hpet_address);
583 }
584 #endif /* X86 */
585
586 return 0;
587 }
588 #else
589 #define acpi_parse_hpet NULL
590 #endif
591
592 #ifdef CONFIG_X86_PM_TIMER
593 extern u32 pmtmr_ioport;
594 #endif
595
596 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
597 {
598 struct fadt_descriptor_rev2 *fadt = NULL;
599
600 fadt = (struct fadt_descriptor_rev2*) __acpi_map_table(phys,size);
601 if(!fadt) {
602 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
603 return 0;
604 }
605
606 #ifdef CONFIG_ACPI_INTERPRETER
607 /* initialize sci_int early for INT_SRC_OVR MADT parsing */
608 acpi_fadt.sci_int = fadt->sci_int;
609 #endif
610
611 #ifdef CONFIG_X86_PM_TIMER
612 /* detect the location of the ACPI PM Timer */
613 if (fadt->revision >= FADT2_REVISION_ID) {
614 /* FADT rev. 2 */
615 if (fadt->xpm_tmr_blk.address_space_id != ACPI_ADR_SPACE_SYSTEM_IO)
616 return 0;
617
618 pmtmr_ioport = fadt->xpm_tmr_blk.address;
619 } else {
620 /* FADT rev. 1 */
621 pmtmr_ioport = fadt->V1_pm_tmr_blk;
622 }
623 if (pmtmr_ioport)
624 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", pmtmr_ioport);
625 #endif
626 return 0;
627 }
628
629
630 unsigned long __init
631 acpi_find_rsdp (void)
632 {
633 unsigned long rsdp_phys = 0;
634
635 if (efi_enabled) {
636 if (efi.acpi20)
637 return __pa(efi.acpi20);
638 else if (efi.acpi)
639 return __pa(efi.acpi);
640 }
641 /*
642 * Scan memory looking for the RSDP signature. First search EBDA (low
643 * memory) paragraphs and then search upper memory (E0000-FFFFF).
644 */
645 rsdp_phys = acpi_scan_rsdp (0, 0x400);
646 if (!rsdp_phys)
647 rsdp_phys = acpi_scan_rsdp (0xE0000, 0xFFFFF);
648
649 return rsdp_phys;
650 }
651
652 #ifdef CONFIG_X86_LOCAL_APIC
653 /*
654 * Parse LAPIC entries in MADT
655 * returns 0 on success, < 0 on error
656 */
657 static int __init
658 acpi_parse_madt_lapic_entries(void)
659 {
660 int count;
661
662 /*
663 * Note that the LAPIC address is obtained from the MADT (32-bit value)
664 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
665 */
666
667 count = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0);
668 if (count < 0) {
669 printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
670 return count;
671 }
672
673 mp_register_lapic_address(acpi_lapic_addr);
674
675 count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
676 MAX_APICS);
677 if (!count) {
678 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
679 /* TBD: Cleanup to allow fallback to MPS */
680 return -ENODEV;
681 }
682 else if (count < 0) {
683 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
684 /* TBD: Cleanup to allow fallback to MPS */
685 return count;
686 }
687
688 count = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
689 if (count < 0) {
690 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
691 /* TBD: Cleanup to allow fallback to MPS */
692 return count;
693 }
694 return 0;
695 }
696 #endif /* CONFIG_X86_LOCAL_APIC */
697
698 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
699 /*
700 * Parse IOAPIC related entries in MADT
701 * returns 0 on success, < 0 on error
702 */
703 static int __init
704 acpi_parse_madt_ioapic_entries(void)
705 {
706 int count;
707
708 /*
709 * ACPI interpreter is required to complete interrupt setup,
710 * so if it is off, don't enumerate the io-apics with ACPI.
711 * If MPS is present, it will handle them,
712 * otherwise the system will stay in PIC mode
713 */
714 if (acpi_disabled || acpi_noirq) {
715 return -ENODEV;
716 }
717
718 /*
719 * if "noapic" boot option, don't look for IO-APICs
720 */
721 if (skip_ioapic_setup) {
722 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
723 "due to 'noapic' option.\n");
724 return -ENODEV;
725 }
726
727 count = acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic, MAX_IO_APICS);
728 if (!count) {
729 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
730 return -ENODEV;
731 }
732 else if (count < 0) {
733 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
734 return count;
735 }
736
737 count = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, NR_IRQ_VECTORS);
738 if (count < 0) {
739 printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
740 /* TBD: Cleanup to allow fallback to MPS */
741 return count;
742 }
743
744 /*
745 * If BIOS did not supply an INT_SRC_OVR for the SCI
746 * pretend we got one so we can set the SCI flags.
747 */
748 if (!acpi_sci_override_gsi)
749 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
750
751 /* Fill in identity legacy mapings where no override */
752 mp_config_acpi_legacy_irqs();
753
754 count = acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, NR_IRQ_VECTORS);
755 if (count < 0) {
756 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
757 /* TBD: Cleanup to allow fallback to MPS */
758 return count;
759 }
760
761 return 0;
762 }
763 #else
764 static inline int acpi_parse_madt_ioapic_entries(void)
765 {
766 return -1;
767 }
768 #endif /* !(CONFIG_X86_IO_APIC && CONFIG_ACPI_INTERPRETER) */
769
770
771 static void __init
772 acpi_process_madt(void)
773 {
774 #ifdef CONFIG_X86_LOCAL_APIC
775 int count, error;
776
777 count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
778 if (count >= 1) {
779
780 /*
781 * Parse MADT LAPIC entries
782 */
783 error = acpi_parse_madt_lapic_entries();
784 if (!error) {
785 acpi_lapic = 1;
786
787 /*
788 * Parse MADT IO-APIC entries
789 */
790 error = acpi_parse_madt_ioapic_entries();
791 if (!error) {
792 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
793 acpi_irq_balance_set(NULL);
794 acpi_ioapic = 1;
795
796 smp_found_config = 1;
797 clustered_apic_check();
798 }
799 }
800 if (error == -EINVAL) {
801 /*
802 * Dell Precision Workstation 410, 610 come here.
803 */
804 printk(KERN_ERR PREFIX "Invalid BIOS MADT, disabling ACPI\n");
805 disable_acpi();
806 }
807 }
808 #endif
809 return;
810 }
811
812 /*
813 * acpi_boot_table_init() and acpi_boot_init()
814 * called from setup_arch(), always.
815 * 1. checksums all tables
816 * 2. enumerates lapics
817 * 3. enumerates io-apics
818 *
819 * acpi_table_init() is separate to allow reading SRAT without
820 * other side effects.
821 *
822 * side effects of acpi_boot_init:
823 * acpi_lapic = 1 if LAPIC found
824 * acpi_ioapic = 1 if IOAPIC found
825 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
826 * if acpi_blacklisted() acpi_disabled = 1;
827 * acpi_irq_model=...
828 * ...
829 *
830 * return value: (currently ignored)
831 * 0: success
832 * !0: failure
833 */
834
835 int __init
836 acpi_boot_table_init(void)
837 {
838 int error;
839
840 /*
841 * If acpi_disabled, bail out
842 * One exception: acpi=ht continues far enough to enumerate LAPICs
843 */
844 if (acpi_disabled && !acpi_ht)
845 return 1;
846
847 /*
848 * Initialize the ACPI boot-time table parser.
849 */
850 error = acpi_table_init();
851 if (error) {
852 disable_acpi();
853 return error;
854 }
855
856 #ifdef __i386__
857 check_acpi_pci();
858 #endif
859
860 acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
861
862 /*
863 * blacklist may disable ACPI entirely
864 */
865 error = acpi_blacklisted();
866 if (error) {
867 extern int acpi_force;
868
869 if (acpi_force) {
870 printk(KERN_WARNING PREFIX "acpi=force override\n");
871 } else {
872 printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
873 disable_acpi();
874 return error;
875 }
876 }
877
878 return 0;
879 }
880
881
882 int __init acpi_boot_init(void)
883 {
884 /*
885 * If acpi_disabled, bail out
886 * One exception: acpi=ht continues far enough to enumerate LAPICs
887 */
888 if (acpi_disabled && !acpi_ht)
889 return 1;
890
891 acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
892
893 /*
894 * set sci_int and PM timer address
895 */
896 acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
897
898 /*
899 * Process the Multiple APIC Description Table (MADT), if present
900 */
901 acpi_process_madt();
902
903 acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
904 acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
905
906 return 0;
907 }
908
909
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