Merge Christoph's freeze cleanup patch
[linux-2.6] / arch / i386 / 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/config.h>
28 #include <linux/acpi.h>
29 #include <linux/efi.h>
30 #include <linux/irq.h>
31 #include <linux/module.h>
32 #include <linux/dmi.h>
33
34 #include <asm/pgtable.h>
35 #include <asm/io_apic.h>
36 #include <asm/apic.h>
37 #include <asm/io.h>
38 #include <asm/irq.h>
39 #include <asm/mpspec.h>
40
41 #ifdef  CONFIG_X86_64
42
43 static inline void  acpi_madt_oem_check(char *oem_id, char *oem_table_id) { }
44 extern void __init clustered_apic_check(void);
45 static inline int ioapic_setup_disabled(void) { return 0; }
46 #include <asm/proto.h>
47
48 #else   /* X86 */
49
50 #ifdef  CONFIG_X86_LOCAL_APIC
51 #include <mach_apic.h>
52 #include <mach_mpparse.h>
53 #endif  /* CONFIG_X86_LOCAL_APIC */
54
55 #endif  /* X86 */
56
57 #define BAD_MADT_ENTRY(entry, end) (                                        \
58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
59                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
60
61 #define PREFIX                  "ACPI: "
62
63 #ifdef CONFIG_ACPI_PCI
64 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
65 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
66 #else
67 int acpi_noirq __initdata = 1;
68 int acpi_pci_disabled __initdata = 1;
69 #endif
70 int acpi_ht __initdata = 1;     /* enable HT */
71
72 int acpi_lapic;
73 int acpi_ioapic;
74 int acpi_strict;
75 EXPORT_SYMBOL(acpi_strict);
76
77 acpi_interrupt_flags acpi_sci_flags __initdata;
78 int acpi_sci_override_gsi __initdata;
79 int acpi_skip_timer_override __initdata;
80
81 #ifdef CONFIG_X86_LOCAL_APIC
82 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
83 #endif
84
85 #ifndef __HAVE_ARCH_CMPXCHG
86 #warning ACPI uses CMPXCHG, i486 and later hardware
87 #endif
88
89 #define MAX_MADT_ENTRIES        256
90 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
91                         { [0 ... MAX_MADT_ENTRIES-1] = 0xff };
92 EXPORT_SYMBOL(x86_acpiid_to_apicid);
93
94 /* --------------------------------------------------------------------------
95                               Boot-time Configuration
96    -------------------------------------------------------------------------- */
97
98 /*
99  * The default interrupt routing model is PIC (8259).  This gets
100  * overriden if IOAPICs are enumerated (below).
101  */
102 enum acpi_irq_model_id          acpi_irq_model = ACPI_IRQ_MODEL_PIC;
103
104 #ifdef  CONFIG_X86_64
105
106 /* rely on all ACPI tables being in the direct mapping */
107 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
108 {
109         if (!phys_addr || !size)
110         return NULL;
111
112         if (phys_addr < (end_pfn_map << PAGE_SHIFT))
113                 return __va(phys_addr);
114
115         return NULL;
116 }
117
118 #else
119
120 /*
121  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
122  * to map the target physical address. The problem is that set_fixmap()
123  * provides a single page, and it is possible that the page is not
124  * sufficient.
125  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
126  * i.e. until the next __va_range() call.
127  *
128  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
129  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
130  * count idx down while incrementing the phys address.
131  */
132 char *__acpi_map_table(unsigned long phys, unsigned long size)
133 {
134         unsigned long base, offset, mapped_size;
135         int idx;
136
137         if (phys + size < 8*1024*1024) 
138                 return __va(phys); 
139
140         offset = phys & (PAGE_SIZE - 1);
141         mapped_size = PAGE_SIZE - offset;
142         set_fixmap(FIX_ACPI_END, phys);
143         base = fix_to_virt(FIX_ACPI_END);
144
145         /*
146          * Most cases can be covered by the below.
147          */
148         idx = FIX_ACPI_END;
149         while (mapped_size < size) {
150                 if (--idx < FIX_ACPI_BEGIN)
151                         return NULL;    /* cannot handle this */
152                 phys += PAGE_SIZE;
153                 set_fixmap(idx, phys);
154                 mapped_size += PAGE_SIZE;
155         }
156
157         return ((unsigned char *) base + offset);
158 }
159 #endif
160
161 #ifdef CONFIG_PCI_MMCONFIG
162 static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
163 {
164         struct acpi_table_mcfg *mcfg;
165
166         if (!phys_addr || !size)
167                 return -EINVAL;
168
169         mcfg = (struct acpi_table_mcfg *) __acpi_map_table(phys_addr, size);
170         if (!mcfg) {
171                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
172                 return -ENODEV;
173         }
174
175         if (mcfg->base_reserved) {
176                 printk(KERN_ERR PREFIX "MMCONFIG not in low 4GB of memory\n");
177                 return -ENODEV;
178         }
179
180         pci_mmcfg_base_addr = mcfg->base_address;
181
182         return 0;
183 }
184 #else
185 #define acpi_parse_mcfg NULL
186 #endif /* !CONFIG_PCI_MMCONFIG */
187
188 #ifdef CONFIG_X86_LOCAL_APIC
189 static int __init
190 acpi_parse_madt (
191         unsigned long           phys_addr,
192         unsigned long           size)
193 {
194         struct acpi_table_madt  *madt = NULL;
195
196         if (!phys_addr || !size)
197                 return -EINVAL;
198
199         madt = (struct acpi_table_madt *) __acpi_map_table(phys_addr, size);
200         if (!madt) {
201                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
202                 return -ENODEV;
203         }
204
205         if (madt->lapic_address) {
206                 acpi_lapic_addr = (u64) madt->lapic_address;
207
208                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
209                         madt->lapic_address);
210         }
211
212         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
213         
214         return 0;
215 }
216
217
218 static int __init
219 acpi_parse_lapic (
220         acpi_table_entry_header *header, const unsigned long end)
221 {
222         struct acpi_table_lapic *processor = NULL;
223
224         processor = (struct acpi_table_lapic*) header;
225
226         if (BAD_MADT_ENTRY(processor, end))
227                 return -EINVAL;
228
229         acpi_table_print_madt_entry(header);
230
231         /* no utility in registering a disabled processor */
232         if (processor->flags.enabled == 0)
233                 return 0;
234
235         x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
236
237         mp_register_lapic (
238                 processor->id,                                     /* APIC ID */
239                 processor->flags.enabled);                        /* Enabled? */
240
241         return 0;
242 }
243
244 static int __init
245 acpi_parse_lapic_addr_ovr (
246         acpi_table_entry_header *header, const unsigned long end)
247 {
248         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
249
250         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr*) header;
251
252         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
253                 return -EINVAL;
254
255         acpi_lapic_addr = lapic_addr_ovr->address;
256
257         return 0;
258 }
259
260 static int __init
261 acpi_parse_lapic_nmi (
262         acpi_table_entry_header *header, const unsigned long end)
263 {
264         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
265
266         lapic_nmi = (struct acpi_table_lapic_nmi*) header;
267
268         if (BAD_MADT_ENTRY(lapic_nmi, end))
269                 return -EINVAL;
270
271         acpi_table_print_madt_entry(header);
272
273         if (lapic_nmi->lint != 1)
274                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
275
276         return 0;
277 }
278
279
280 #endif /*CONFIG_X86_LOCAL_APIC*/
281
282 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
283
284 static int __init
285 acpi_parse_ioapic (
286         acpi_table_entry_header *header, const unsigned long end)
287 {
288         struct acpi_table_ioapic *ioapic = NULL;
289
290         ioapic = (struct acpi_table_ioapic*) header;
291
292         if (BAD_MADT_ENTRY(ioapic, end))
293                 return -EINVAL;
294  
295         acpi_table_print_madt_entry(header);
296
297         mp_register_ioapic (
298                 ioapic->id,
299                 ioapic->address,
300                 ioapic->global_irq_base);
301  
302         return 0;
303 }
304
305 /*
306  * Parse Interrupt Source Override for the ACPI SCI
307  */
308 static void
309 acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
310 {
311         if (trigger == 0)       /* compatible SCI trigger is level */
312                 trigger = 3;
313
314         if (polarity == 0)      /* compatible SCI polarity is low */
315                 polarity = 3;
316
317         /* Command-line over-ride via acpi_sci= */
318         if (acpi_sci_flags.trigger)
319                 trigger = acpi_sci_flags.trigger;
320
321         if (acpi_sci_flags.polarity)
322                 polarity = acpi_sci_flags.polarity;
323
324         /*
325          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
326          * If GSI is < 16, this will update its flags,
327          * else it will create a new mp_irqs[] entry.
328          */
329         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
330
331         /*
332          * stash over-ride to indicate we've been here
333          * and for later update of acpi_fadt
334          */
335         acpi_sci_override_gsi = gsi;
336         return;
337 }
338
339 static int __init
340 acpi_parse_int_src_ovr (
341         acpi_table_entry_header *header, const unsigned long end)
342 {
343         struct acpi_table_int_src_ovr *intsrc = NULL;
344
345         intsrc = (struct acpi_table_int_src_ovr*) header;
346
347         if (BAD_MADT_ENTRY(intsrc, end))
348                 return -EINVAL;
349
350         acpi_table_print_madt_entry(header);
351
352         if (intsrc->bus_irq == acpi_fadt.sci_int) {
353                 acpi_sci_ioapic_setup(intsrc->global_irq,
354                         intsrc->flags.polarity, intsrc->flags.trigger);
355                 return 0;
356         }
357
358         if (acpi_skip_timer_override &&
359                 intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
360                         printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
361                         return 0;
362         }
363
364         mp_override_legacy_irq (
365                 intsrc->bus_irq,
366                 intsrc->flags.polarity,
367                 intsrc->flags.trigger,
368                 intsrc->global_irq);
369
370         return 0;
371 }
372
373
374 static int __init
375 acpi_parse_nmi_src (
376         acpi_table_entry_header *header, const unsigned long end)
377 {
378         struct acpi_table_nmi_src *nmi_src = NULL;
379
380         nmi_src = (struct acpi_table_nmi_src*) header;
381
382         if (BAD_MADT_ENTRY(nmi_src, end))
383                 return -EINVAL;
384
385         acpi_table_print_madt_entry(header);
386
387         /* TBD: Support nimsrc entries? */
388
389         return 0;
390 }
391
392 #endif /* CONFIG_X86_IO_APIC */
393
394 #ifdef  CONFIG_ACPI_BUS
395
396 /*
397  * acpi_pic_sci_set_trigger()
398  * 
399  * use ELCR to set PIC-mode trigger type for SCI
400  *
401  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
402  * it may require Edge Trigger -- use "acpi_sci=edge"
403  *
404  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
405  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
406  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
407  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
408  */
409
410 void __init
411 acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
412 {
413         unsigned int mask = 1 << irq;
414         unsigned int old, new;
415
416         /* Real old ELCR mask */
417         old = inb(0x4d0) | (inb(0x4d1) << 8);
418
419         /*
420          * If we use ACPI to set PCI irq's, then we should clear ELCR
421          * since we will set it correctly as we enable the PCI irq
422          * routing.
423          */
424         new = acpi_noirq ? old : 0;
425
426         /*
427          * Update SCI information in the ELCR, it isn't in the PCI
428          * routing tables..
429          */
430         switch (trigger) {
431         case 1: /* Edge - clear */
432                 new &= ~mask;
433                 break;
434         case 3: /* Level - set */
435                 new |= mask;
436                 break;
437         }
438
439         if (old == new)
440                 return;
441
442         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
443         outb(new, 0x4d0);
444         outb(new >> 8, 0x4d1);
445 }
446
447
448 #endif /* CONFIG_ACPI_BUS */
449
450 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
451 {
452 #ifdef CONFIG_X86_IO_APIC
453         if (use_pci_vector() && !platform_legacy_irq(gsi))
454                 *irq = IO_APIC_VECTOR(gsi);
455         else
456 #endif
457                 *irq = gsi;
458         return 0;
459 }
460
461 unsigned int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
462 {
463         unsigned int irq;
464         unsigned int plat_gsi = gsi;
465
466 #ifdef CONFIG_PCI
467         /*
468          * Make sure all (legacy) PCI IRQs are set as level-triggered.
469          */
470         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
471                 extern void eisa_set_level_irq(unsigned int irq);
472
473                 if (edge_level == ACPI_LEVEL_SENSITIVE)
474                                 eisa_set_level_irq(gsi);
475         }
476 #endif
477
478 #ifdef CONFIG_X86_IO_APIC
479         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
480                 plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
481         }
482 #endif
483         acpi_gsi_to_irq(plat_gsi, &irq);
484         return irq;
485 }
486 EXPORT_SYMBOL(acpi_register_gsi);
487
488 /*
489  *  ACPI based hotplug support for CPU
490  */
491 #ifdef CONFIG_ACPI_HOTPLUG_CPU
492 int
493 acpi_map_lsapic(acpi_handle handle, int *pcpu)
494 {
495         /* TBD */
496         return -EINVAL;
497 }
498 EXPORT_SYMBOL(acpi_map_lsapic);
499
500
501 int
502 acpi_unmap_lsapic(int cpu)
503 {
504         /* TBD */
505         return -EINVAL;
506 }
507 EXPORT_SYMBOL(acpi_unmap_lsapic);
508 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
509
510 static unsigned long __init
511 acpi_scan_rsdp (
512         unsigned long           start,
513         unsigned long           length)
514 {
515         unsigned long           offset = 0;
516         unsigned long           sig_len = sizeof("RSD PTR ") - 1;
517
518         /*
519          * Scan all 16-byte boundaries of the physical memory region for the
520          * RSDP signature.
521          */
522         for (offset = 0; offset < length; offset += 16) {
523                 if (strncmp((char *) (start + offset), "RSD PTR ", sig_len))
524                         continue;
525                 return (start + offset);
526         }
527
528         return 0;
529 }
530
531 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
532 {
533         struct acpi_table_sbf *sb;
534
535         if (!phys_addr || !size)
536         return -EINVAL;
537
538         sb = (struct acpi_table_sbf *) __acpi_map_table(phys_addr, size);
539         if (!sb) {
540                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
541                 return -ENODEV;
542         }
543
544         sbf_port = sb->sbf_cmos; /* Save CMOS port */
545
546         return 0;
547 }
548
549
550 #ifdef CONFIG_HPET_TIMER
551
552 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
553 {
554         struct acpi_table_hpet *hpet_tbl;
555
556         if (!phys || !size)
557                 return -EINVAL;
558
559         hpet_tbl = (struct acpi_table_hpet *) __acpi_map_table(phys, size);
560         if (!hpet_tbl) {
561                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
562                 return -ENODEV;
563         }
564
565         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
566                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
567                        "memory.\n");
568                 return -1;
569         }
570
571 #ifdef  CONFIG_X86_64
572         vxtime.hpet_address = hpet_tbl->addr.addrl |
573                 ((long) hpet_tbl->addr.addrh << 32);
574
575         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
576                hpet_tbl->id, vxtime.hpet_address);
577 #else   /* X86 */
578         {
579                 extern unsigned long hpet_address;
580
581                 hpet_address = hpet_tbl->addr.addrl;
582                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
583                         hpet_tbl->id, hpet_address);
584         }
585 #endif  /* X86 */
586
587         return 0;
588 }
589 #else
590 #define acpi_parse_hpet NULL
591 #endif
592
593 #ifdef CONFIG_X86_PM_TIMER
594 extern u32 pmtmr_ioport;
595 #endif
596
597 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
598 {
599         struct fadt_descriptor_rev2 *fadt = NULL;
600
601         fadt = (struct fadt_descriptor_rev2*) __acpi_map_table(phys,size);
602         if(!fadt) {
603                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
604                 return 0;
605         }
606
607 #ifdef  CONFIG_ACPI_INTERPRETER
608         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
609         acpi_fadt.sci_int = fadt->sci_int;
610 #endif
611
612 #ifdef CONFIG_ACPI_BUS
613         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
614         acpi_fadt.revision = fadt->revision;
615         acpi_fadt.force_apic_physical_destination_mode = fadt->force_apic_physical_destination_mode;
616 #endif
617
618 #ifdef CONFIG_X86_PM_TIMER
619         /* detect the location of the ACPI PM Timer */
620         if (fadt->revision >= FADT2_REVISION_ID) {
621                 /* FADT rev. 2 */
622                 if (fadt->xpm_tmr_blk.address_space_id != ACPI_ADR_SPACE_SYSTEM_IO)
623                         return 0;
624
625                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
626         } else {
627                 /* FADT rev. 1 */
628                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
629         }
630         if (pmtmr_ioport)
631                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", pmtmr_ioport);
632 #endif
633         return 0;
634 }
635
636
637 unsigned long __init
638 acpi_find_rsdp (void)
639 {
640         unsigned long           rsdp_phys = 0;
641
642         if (efi_enabled) {
643                 if (efi.acpi20)
644                         return __pa(efi.acpi20);
645                 else if (efi.acpi)
646                         return __pa(efi.acpi);
647         }
648         /*
649          * Scan memory looking for the RSDP signature. First search EBDA (low
650          * memory) paragraphs and then search upper memory (E0000-FFFFF).
651          */
652         rsdp_phys = acpi_scan_rsdp (0, 0x400);
653         if (!rsdp_phys)
654                 rsdp_phys = acpi_scan_rsdp (0xE0000, 0x20000);
655
656         return rsdp_phys;
657 }
658
659 #ifdef  CONFIG_X86_LOCAL_APIC
660 /*
661  * Parse LAPIC entries in MADT
662  * returns 0 on success, < 0 on error
663  */
664 static int __init
665 acpi_parse_madt_lapic_entries(void)
666 {
667         int count;
668
669         /* 
670          * Note that the LAPIC address is obtained from the MADT (32-bit value)
671          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
672          */
673
674         count = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0);
675         if (count < 0) {
676                 printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
677                 return count;
678         }
679
680         mp_register_lapic_address(acpi_lapic_addr);
681
682         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
683                                        MAX_APICS);
684         if (!count) { 
685                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
686                 /* TBD: Cleanup to allow fallback to MPS */
687                 return -ENODEV;
688         }
689         else if (count < 0) {
690                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
691                 /* TBD: Cleanup to allow fallback to MPS */
692                 return count;
693         }
694
695         count = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
696         if (count < 0) {
697                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
698                 /* TBD: Cleanup to allow fallback to MPS */
699                 return count;
700         }
701         return 0;
702 }
703 #endif /* CONFIG_X86_LOCAL_APIC */
704
705 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
706 /*
707  * Parse IOAPIC related entries in MADT
708  * returns 0 on success, < 0 on error
709  */
710 static int __init
711 acpi_parse_madt_ioapic_entries(void)
712 {
713         int count;
714
715         /*
716          * ACPI interpreter is required to complete interrupt setup,
717          * so if it is off, don't enumerate the io-apics with ACPI.
718          * If MPS is present, it will handle them,
719          * otherwise the system will stay in PIC mode
720          */
721         if (acpi_disabled || acpi_noirq) {
722                 return -ENODEV;
723         }
724
725         /*
726          * if "noapic" boot option, don't look for IO-APICs
727          */
728         if (skip_ioapic_setup) {
729                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
730                         "due to 'noapic' option.\n");
731                 return -ENODEV;
732         }
733
734         count = acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic, MAX_IO_APICS);
735         if (!count) {
736                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
737                 return -ENODEV;
738         }
739         else if (count < 0) {
740                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
741                 return count;
742         }
743
744         count = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, NR_IRQ_VECTORS);
745         if (count < 0) {
746                 printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
747                 /* TBD: Cleanup to allow fallback to MPS */
748                 return count;
749         }
750
751         /*
752          * If BIOS did not supply an INT_SRC_OVR for the SCI
753          * pretend we got one so we can set the SCI flags.
754          */
755         if (!acpi_sci_override_gsi)
756                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
757
758         /* Fill in identity legacy mapings where no override */
759         mp_config_acpi_legacy_irqs();
760
761         count = acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, NR_IRQ_VECTORS);
762         if (count < 0) {
763                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
764                 /* TBD: Cleanup to allow fallback to MPS */
765                 return count;
766         }
767
768         return 0;
769 }
770 #else
771 static inline int acpi_parse_madt_ioapic_entries(void)
772 {
773         return -1;
774 }
775 #endif /* !(CONFIG_X86_IO_APIC && CONFIG_ACPI_INTERPRETER) */
776
777
778 static void __init
779 acpi_process_madt(void)
780 {
781 #ifdef CONFIG_X86_LOCAL_APIC
782         int count, error;
783
784         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
785         if (count >= 1) {
786
787                 /*
788                  * Parse MADT LAPIC entries
789                  */
790                 error = acpi_parse_madt_lapic_entries();
791                 if (!error) {
792                         acpi_lapic = 1;
793
794                         /*
795                          * Parse MADT IO-APIC entries
796                          */
797                         error = acpi_parse_madt_ioapic_entries();
798                         if (!error) {
799                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
800                                 acpi_irq_balance_set(NULL);
801                                 acpi_ioapic = 1;
802
803                                 smp_found_config = 1;
804                                 clustered_apic_check();
805                         }
806                 }
807                 if (error == -EINVAL) {
808                         /*
809                          * Dell Precision Workstation 410, 610 come here.
810                          */
811                         printk(KERN_ERR PREFIX "Invalid BIOS MADT, disabling ACPI\n");
812                         disable_acpi();
813                 }
814         }
815 #endif
816         return;
817 }
818
819 extern int acpi_force;
820
821 #ifdef __i386__
822
823 #ifdef  CONFIG_ACPI_PCI
824 static int __init disable_acpi_irq(struct dmi_system_id *d)
825 {
826         if (!acpi_force) {
827                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
828                        d->ident);
829                 acpi_noirq_set();
830         }
831         return 0;
832 }
833
834 static int __init disable_acpi_pci(struct dmi_system_id *d)
835 {
836         if (!acpi_force) {
837                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
838                        d->ident);
839                 acpi_disable_pci();
840         }
841         return 0;
842 }
843 #endif
844
845 static int __init dmi_disable_acpi(struct dmi_system_id *d)
846 {
847         if (!acpi_force) {
848                 printk(KERN_NOTICE "%s detected: acpi off\n",d->ident);
849                 disable_acpi();
850         } else {
851                 printk(KERN_NOTICE
852                        "Warning: DMI blacklist says broken, but acpi forced\n");
853         }
854         return 0;
855 }
856
857 /*
858  * Limit ACPI to CPU enumeration for HT
859  */
860 static int __init force_acpi_ht(struct dmi_system_id *d)
861 {
862         if (!acpi_force) {
863                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", d->ident);
864                 disable_acpi();
865                 acpi_ht = 1;
866         } else {
867                 printk(KERN_NOTICE
868                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
869         }
870         return 0;
871 }
872
873 /*
874  * If your system is blacklisted here, but you find that acpi=force
875  * works for you, please contact acpi-devel@sourceforge.net
876  */
877 static struct dmi_system_id __initdata acpi_dmi_table[] = {
878         /*
879          * Boxes that need ACPI disabled
880          */
881         {
882                 .callback = dmi_disable_acpi,
883                 .ident = "IBM Thinkpad",
884                 .matches = {
885                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
886                         DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
887                 },
888         },
889
890         /*
891          * Boxes that need acpi=ht
892          */
893         {
894                 .callback = force_acpi_ht,
895                 .ident = "FSC Primergy T850",
896                 .matches = {
897                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
898                         DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
899                 },
900         },
901         {
902                 .callback = force_acpi_ht,
903                 .ident = "DELL GX240",
904                 .matches = {
905                         DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
906                         DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
907                 },
908         },
909         {
910                 .callback = force_acpi_ht,
911                 .ident = "HP VISUALIZE NT Workstation",
912                 .matches = {
913                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
914                         DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
915                 },
916         },
917         {
918                 .callback = force_acpi_ht,
919                 .ident = "Compaq Workstation W8000",
920                 .matches = {
921                         DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
922                         DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
923                 },
924         },
925         {
926                 .callback = force_acpi_ht,
927                 .ident = "ASUS P4B266",
928                 .matches = {
929                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
930                         DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
931                 },
932         },
933         {
934                 .callback = force_acpi_ht,
935                 .ident = "ASUS P2B-DS",
936                 .matches = {
937                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
938                         DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
939                 },
940         },
941         {
942                 .callback = force_acpi_ht,
943                 .ident = "ASUS CUR-DLS",
944                 .matches = {
945                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
946                         DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
947                 },
948         },
949         {
950                 .callback = force_acpi_ht,
951                 .ident = "ABIT i440BX-W83977",
952                 .matches = {
953                         DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
954                         DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
955                 },
956         },
957         {
958                 .callback = force_acpi_ht,
959                 .ident = "IBM Bladecenter",
960                 .matches = {
961                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
962                         DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
963                 },
964         },
965         {
966                 .callback = force_acpi_ht,
967                 .ident = "IBM eServer xSeries 360",
968                 .matches = {
969                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
970                         DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
971                 },
972         },
973         {
974                 .callback = force_acpi_ht,
975                 .ident = "IBM eserver xSeries 330",
976                 .matches = {
977                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
978                         DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
979                 },
980         },
981         {
982                 .callback = force_acpi_ht,
983                 .ident = "IBM eserver xSeries 440",
984                 .matches = {
985                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
986                         DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
987                 },
988         },
989
990 #ifdef  CONFIG_ACPI_PCI
991         /*
992          * Boxes that need ACPI PCI IRQ routing disabled
993          */
994         {
995                 .callback = disable_acpi_irq,
996                 .ident = "ASUS A7V",
997                 .matches = {
998                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
999                         DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1000                         /* newer BIOS, Revision 1011, does work */
1001                         DMI_MATCH(DMI_BIOS_VERSION, "ASUS A7V ACPI BIOS Revision 1007"),
1002                 },
1003         },
1004
1005         /*
1006          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1007          */
1008         {       /* _BBN 0 bug */
1009                 .callback = disable_acpi_pci,
1010                 .ident = "ASUS PR-DLS",
1011                 .matches = {
1012                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1013                         DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1014                         DMI_MATCH(DMI_BIOS_VERSION, "ASUS PR-DLS ACPI BIOS Revision 1010"),
1015                         DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1016                 },
1017         },
1018         {
1019                 .callback = disable_acpi_pci,
1020                 .ident = "Acer TravelMate 36x Laptop",
1021                 .matches = {
1022                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1023                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1024                 },
1025         },
1026 #endif
1027         { }
1028 };
1029
1030 #endif  /* __i386__ */
1031
1032 /*
1033  * acpi_boot_table_init() and acpi_boot_init()
1034  *  called from setup_arch(), always.
1035  *      1. checksums all tables
1036  *      2. enumerates lapics
1037  *      3. enumerates io-apics
1038  *
1039  * acpi_table_init() is separate to allow reading SRAT without
1040  * other side effects.
1041  *
1042  * side effects of acpi_boot_init:
1043  *      acpi_lapic = 1 if LAPIC found
1044  *      acpi_ioapic = 1 if IOAPIC found
1045  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1046  *      if acpi_blacklisted() acpi_disabled = 1;
1047  *      acpi_irq_model=...
1048  *      ...
1049  *
1050  * return value: (currently ignored)
1051  *      0: success
1052  *      !0: failure
1053  */
1054
1055 int __init
1056 acpi_boot_table_init(void)
1057 {
1058         int error;
1059
1060 #ifdef __i386__
1061         dmi_check_system(acpi_dmi_table);
1062 #endif
1063
1064         /*
1065          * If acpi_disabled, bail out
1066          * One exception: acpi=ht continues far enough to enumerate LAPICs
1067          */
1068         if (acpi_disabled && !acpi_ht)
1069                  return 1;
1070
1071         /* 
1072          * Initialize the ACPI boot-time table parser.
1073          */
1074         error = acpi_table_init();
1075         if (error) {
1076                 disable_acpi();
1077                 return error;
1078         }
1079
1080 #ifdef __i386__
1081         check_acpi_pci();
1082 #endif
1083
1084         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1085
1086         /*
1087          * blacklist may disable ACPI entirely
1088          */
1089         error = acpi_blacklisted();
1090         if (error) {
1091                 if (acpi_force) {
1092                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1093                 } else {
1094                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1095                         disable_acpi();
1096                         return error;
1097                 }
1098         }
1099
1100         return 0;
1101 }
1102
1103
1104 int __init acpi_boot_init(void)
1105 {
1106         /*
1107          * If acpi_disabled, bail out
1108          * One exception: acpi=ht continues far enough to enumerate LAPICs
1109          */
1110         if (acpi_disabled && !acpi_ht)
1111                  return 1;
1112
1113         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1114
1115         /*
1116          * set sci_int and PM timer address
1117          */
1118         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1119
1120         /*
1121          * Process the Multiple APIC Description Table (MADT), if present
1122          */
1123         acpi_process_madt();
1124
1125         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1126         acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
1127
1128         return 0;
1129 }
1130