Pull 5283 into release branch
[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/module.h>
31 #include <linux/dmi.h>
32 #include <linux/irq.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/mpspec.h>
39
40 #ifdef  CONFIG_X86_64
41
42 extern void __init clustered_apic_check(void);
43
44 extern int gsi_irq_sharing(int gsi);
45 #include <asm/proto.h>
46
47 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
48
49
50 #else                           /* X86 */
51
52 #ifdef  CONFIG_X86_LOCAL_APIC
53 #include <mach_apic.h>
54 #include <mach_mpparse.h>
55 #endif                          /* CONFIG_X86_LOCAL_APIC */
56
57 static inline int gsi_irq_sharing(int gsi) { return gsi; }
58
59 #endif                          /* X86 */
60
61 #define BAD_MADT_ENTRY(entry, end) (                                        \
62                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
63                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
64
65 #define PREFIX                  "ACPI: "
66
67 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
68 int acpi_pci_disabled __initdata;       /* skip ACPI PCI scan and IRQ initialization */
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 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
162 struct acpi_table_mcfg_config *pci_mmcfg_config;
163 int pci_mmcfg_config_num;
164
165 int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
166 {
167         struct acpi_table_mcfg *mcfg;
168         unsigned long i;
169         int config_size;
170
171         if (!phys_addr || !size)
172                 return -EINVAL;
173
174         mcfg = (struct acpi_table_mcfg *)__acpi_map_table(phys_addr, size);
175         if (!mcfg) {
176                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
177                 return -ENODEV;
178         }
179
180         /* how many config structures do we have */
181         pci_mmcfg_config_num = 0;
182         i = size - sizeof(struct acpi_table_mcfg);
183         while (i >= sizeof(struct acpi_table_mcfg_config)) {
184                 ++pci_mmcfg_config_num;
185                 i -= sizeof(struct acpi_table_mcfg_config);
186         };
187         if (pci_mmcfg_config_num == 0) {
188                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
189                 return -ENODEV;
190         }
191
192         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
193         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
194         if (!pci_mmcfg_config) {
195                 printk(KERN_WARNING PREFIX
196                        "No memory for MCFG config tables\n");
197                 return -ENOMEM;
198         }
199
200         memcpy(pci_mmcfg_config, &mcfg->config, config_size);
201         for (i = 0; i < pci_mmcfg_config_num; ++i) {
202                 if (mcfg->config[i].base_reserved) {
203                         printk(KERN_ERR PREFIX
204                                "MMCONFIG not in low 4GB of memory\n");
205                         return -ENODEV;
206                 }
207         }
208
209         return 0;
210 }
211 #endif                          /* CONFIG_PCI_MMCONFIG */
212
213 #ifdef CONFIG_X86_LOCAL_APIC
214 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
215 {
216         struct acpi_table_madt *madt = NULL;
217
218         if (!phys_addr || !size)
219                 return -EINVAL;
220
221         madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size);
222         if (!madt) {
223                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
224                 return -ENODEV;
225         }
226
227         if (madt->lapic_address) {
228                 acpi_lapic_addr = (u64) madt->lapic_address;
229
230                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
231                        madt->lapic_address);
232         }
233
234         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
235
236         return 0;
237 }
238
239 static int __init
240 acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
241 {
242         struct acpi_table_lapic *processor = NULL;
243
244         processor = (struct acpi_table_lapic *)header;
245
246         if (BAD_MADT_ENTRY(processor, end))
247                 return -EINVAL;
248
249         acpi_table_print_madt_entry(header);
250
251         /* Register even disabled CPUs for cpu hotplug */
252
253         x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
254
255         mp_register_lapic(processor->id,        /* APIC ID */
256                           processor->flags.enabled);    /* Enabled? */
257
258         return 0;
259 }
260
261 static int __init
262 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
263                           const unsigned long end)
264 {
265         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
266
267         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr *)header;
268
269         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
270                 return -EINVAL;
271
272         acpi_lapic_addr = lapic_addr_ovr->address;
273
274         return 0;
275 }
276
277 static int __init
278 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
279 {
280         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
281
282         lapic_nmi = (struct acpi_table_lapic_nmi *)header;
283
284         if (BAD_MADT_ENTRY(lapic_nmi, end))
285                 return -EINVAL;
286
287         acpi_table_print_madt_entry(header);
288
289         if (lapic_nmi->lint != 1)
290                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
291
292         return 0;
293 }
294
295 #endif                          /*CONFIG_X86_LOCAL_APIC */
296
297 #ifdef CONFIG_X86_IO_APIC
298
299 static int __init
300 acpi_parse_ioapic(acpi_table_entry_header * header, const unsigned long end)
301 {
302         struct acpi_table_ioapic *ioapic = NULL;
303
304         ioapic = (struct acpi_table_ioapic *)header;
305
306         if (BAD_MADT_ENTRY(ioapic, end))
307                 return -EINVAL;
308
309         acpi_table_print_madt_entry(header);
310
311         mp_register_ioapic(ioapic->id,
312                            ioapic->address, ioapic->global_irq_base);
313
314         return 0;
315 }
316
317 /*
318  * Parse Interrupt Source Override for the ACPI SCI
319  */
320 static void acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
321 {
322         if (trigger == 0)       /* compatible SCI trigger is level */
323                 trigger = 3;
324
325         if (polarity == 0)      /* compatible SCI polarity is low */
326                 polarity = 3;
327
328         /* Command-line over-ride via acpi_sci= */
329         if (acpi_sci_flags.trigger)
330                 trigger = acpi_sci_flags.trigger;
331
332         if (acpi_sci_flags.polarity)
333                 polarity = acpi_sci_flags.polarity;
334
335         /*
336          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
337          * If GSI is < 16, this will update its flags,
338          * else it will create a new mp_irqs[] entry.
339          */
340         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
341
342         /*
343          * stash over-ride to indicate we've been here
344          * and for later update of acpi_fadt
345          */
346         acpi_sci_override_gsi = gsi;
347         return;
348 }
349
350 static int __init
351 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
352                        const unsigned long end)
353 {
354         struct acpi_table_int_src_ovr *intsrc = NULL;
355
356         intsrc = (struct acpi_table_int_src_ovr *)header;
357
358         if (BAD_MADT_ENTRY(intsrc, end))
359                 return -EINVAL;
360
361         acpi_table_print_madt_entry(header);
362
363         if (intsrc->bus_irq == acpi_fadt.sci_int) {
364                 acpi_sci_ioapic_setup(intsrc->global_irq,
365                                       intsrc->flags.polarity,
366                                       intsrc->flags.trigger);
367                 return 0;
368         }
369
370         if (acpi_skip_timer_override &&
371             intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
372                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
373                 return 0;
374         }
375
376         mp_override_legacy_irq(intsrc->bus_irq,
377                                intsrc->flags.polarity,
378                                intsrc->flags.trigger, intsrc->global_irq);
379
380         return 0;
381 }
382
383 static int __init
384 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
385 {
386         struct acpi_table_nmi_src *nmi_src = NULL;
387
388         nmi_src = (struct acpi_table_nmi_src *)header;
389
390         if (BAD_MADT_ENTRY(nmi_src, end))
391                 return -EINVAL;
392
393         acpi_table_print_madt_entry(header);
394
395         /* TBD: Support nimsrc entries? */
396
397         return 0;
398 }
399
400 #endif                          /* CONFIG_X86_IO_APIC */
401
402 /*
403  * acpi_pic_sci_set_trigger()
404  * 
405  * use ELCR to set PIC-mode trigger type for SCI
406  *
407  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
408  * it may require Edge Trigger -- use "acpi_sci=edge"
409  *
410  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
411  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
412  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
413  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
414  */
415
416 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
417 {
418         unsigned int mask = 1 << irq;
419         unsigned int old, new;
420
421         /* Real old ELCR mask */
422         old = inb(0x4d0) | (inb(0x4d1) << 8);
423
424         /*
425          * If we use ACPI to set PCI irq's, then we should clear ELCR
426          * since we will set it correctly as we enable the PCI irq
427          * routing.
428          */
429         new = acpi_noirq ? old : 0;
430
431         /*
432          * Update SCI information in the ELCR, it isn't in the PCI
433          * routing tables..
434          */
435         switch (trigger) {
436         case 1:         /* Edge - clear */
437                 new &= ~mask;
438                 break;
439         case 3:         /* Level - set */
440                 new |= mask;
441                 break;
442         }
443
444         if (old == new)
445                 return;
446
447         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
448         outb(new, 0x4d0);
449         outb(new >> 8, 0x4d1);
450 }
451
452 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
453 {
454 #ifdef CONFIG_X86_IO_APIC
455         if (use_pci_vector() && !platform_legacy_irq(gsi))
456                 *irq = IO_APIC_VECTOR(gsi);
457         else
458 #endif
459                 *irq = gsi_irq_sharing(gsi);
460         return 0;
461 }
462
463 /*
464  * success: return IRQ number (>=0)
465  * failure: return < 0
466  */
467 int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
468 {
469         unsigned int irq;
470         unsigned int plat_gsi = gsi;
471
472 #ifdef CONFIG_PCI
473         /*
474          * Make sure all (legacy) PCI IRQs are set as level-triggered.
475          */
476         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
477                 extern void eisa_set_level_irq(unsigned int irq);
478
479                 if (edge_level == ACPI_LEVEL_SENSITIVE)
480                         eisa_set_level_irq(gsi);
481         }
482 #endif
483
484 #ifdef CONFIG_X86_IO_APIC
485         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
486                 plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
487         }
488 #endif
489         acpi_gsi_to_irq(plat_gsi, &irq);
490         return irq;
491 }
492
493 EXPORT_SYMBOL(acpi_register_gsi);
494
495 /*
496  *  ACPI based hotplug support for CPU
497  */
498 #ifdef CONFIG_ACPI_HOTPLUG_CPU
499 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
500 {
501         /* TBD */
502         return -EINVAL;
503 }
504
505 EXPORT_SYMBOL(acpi_map_lsapic);
506
507 int acpi_unmap_lsapic(int cpu)
508 {
509         /* TBD */
510         return -EINVAL;
511 }
512
513 EXPORT_SYMBOL(acpi_unmap_lsapic);
514 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
515
516 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
517 {
518         /* TBD */
519         return -EINVAL;
520 }
521
522 EXPORT_SYMBOL(acpi_register_ioapic);
523
524 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
525 {
526         /* TBD */
527         return -EINVAL;
528 }
529
530 EXPORT_SYMBOL(acpi_unregister_ioapic);
531
532 static unsigned long __init
533 acpi_scan_rsdp(unsigned long start, unsigned long length)
534 {
535         unsigned long offset = 0;
536         unsigned long sig_len = sizeof("RSD PTR ") - 1;
537
538         /*
539          * Scan all 16-byte boundaries of the physical memory region for the
540          * RSDP signature.
541          */
542         for (offset = 0; offset < length; offset += 16) {
543                 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
544                         continue;
545                 return (start + offset);
546         }
547
548         return 0;
549 }
550
551 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
552 {
553         struct acpi_table_sbf *sb;
554
555         if (!phys_addr || !size)
556                 return -EINVAL;
557
558         sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
559         if (!sb) {
560                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
561                 return -ENODEV;
562         }
563
564         sbf_port = sb->sbf_cmos;        /* Save CMOS port */
565
566         return 0;
567 }
568
569 #ifdef CONFIG_HPET_TIMER
570
571 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
572 {
573         struct acpi_table_hpet *hpet_tbl;
574
575         if (!phys || !size)
576                 return -EINVAL;
577
578         hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
579         if (!hpet_tbl) {
580                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
581                 return -ENODEV;
582         }
583
584         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
585                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
586                        "memory.\n");
587                 return -1;
588         }
589 #ifdef  CONFIG_X86_64
590         vxtime.hpet_address = hpet_tbl->addr.addrl |
591             ((long)hpet_tbl->addr.addrh << 32);
592
593         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
594                hpet_tbl->id, vxtime.hpet_address);
595 #else                           /* X86 */
596         {
597                 extern unsigned long hpet_address;
598
599                 hpet_address = hpet_tbl->addr.addrl;
600                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
601                        hpet_tbl->id, hpet_address);
602         }
603 #endif                          /* X86 */
604
605         return 0;
606 }
607 #else
608 #define acpi_parse_hpet NULL
609 #endif
610
611 #ifdef CONFIG_X86_PM_TIMER
612 extern u32 pmtmr_ioport;
613 #endif
614
615 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
616 {
617         struct fadt_descriptor_rev2 *fadt = NULL;
618
619         fadt = (struct fadt_descriptor_rev2 *)__acpi_map_table(phys, size);
620         if (!fadt) {
621                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
622                 return 0;
623         }
624         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
625         acpi_fadt.sci_int = fadt->sci_int;
626
627         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
628         acpi_fadt.revision = fadt->revision;
629         acpi_fadt.force_apic_physical_destination_mode =
630             fadt->force_apic_physical_destination_mode;
631
632 #ifdef CONFIG_X86_PM_TIMER
633         /* detect the location of the ACPI PM Timer */
634         if (fadt->revision >= FADT2_REVISION_ID) {
635                 /* FADT rev. 2 */
636                 if (fadt->xpm_tmr_blk.address_space_id !=
637                     ACPI_ADR_SPACE_SYSTEM_IO)
638                         return 0;
639
640                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
641                 /*
642                  * "X" fields are optional extensions to the original V1.0
643                  * fields, so we must selectively expand V1.0 fields if the
644                  * corresponding X field is zero.
645                  */
646                 if (!pmtmr_ioport)
647                         pmtmr_ioport = fadt->V1_pm_tmr_blk;
648         } else {
649                 /* FADT rev. 1 */
650                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
651         }
652         if (pmtmr_ioport)
653                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
654                        pmtmr_ioport);
655 #endif
656         return 0;
657 }
658
659 unsigned long __init acpi_find_rsdp(void)
660 {
661         unsigned long rsdp_phys = 0;
662
663         if (efi_enabled) {
664                 if (efi.acpi20)
665                         return __pa(efi.acpi20);
666                 else if (efi.acpi)
667                         return __pa(efi.acpi);
668         }
669         /*
670          * Scan memory looking for the RSDP signature. First search EBDA (low
671          * memory) paragraphs and then search upper memory (E0000-FFFFF).
672          */
673         rsdp_phys = acpi_scan_rsdp(0, 0x400);
674         if (!rsdp_phys)
675                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
676
677         return rsdp_phys;
678 }
679
680 #ifdef  CONFIG_X86_LOCAL_APIC
681 /*
682  * Parse LAPIC entries in MADT
683  * returns 0 on success, < 0 on error
684  */
685 static int __init acpi_parse_madt_lapic_entries(void)
686 {
687         int count;
688
689         /* 
690          * Note that the LAPIC address is obtained from the MADT (32-bit value)
691          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
692          */
693
694         count =
695             acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
696                                   acpi_parse_lapic_addr_ovr, 0);
697         if (count < 0) {
698                 printk(KERN_ERR PREFIX
699                        "Error parsing LAPIC address override entry\n");
700                 return count;
701         }
702
703         mp_register_lapic_address(acpi_lapic_addr);
704
705         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
706                                       MAX_APICS);
707         if (!count) {
708                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
709                 /* TBD: Cleanup to allow fallback to MPS */
710                 return -ENODEV;
711         } else if (count < 0) {
712                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
713                 /* TBD: Cleanup to allow fallback to MPS */
714                 return count;
715         }
716
717         count =
718             acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
719         if (count < 0) {
720                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
721                 /* TBD: Cleanup to allow fallback to MPS */
722                 return count;
723         }
724         return 0;
725 }
726 #endif                          /* CONFIG_X86_LOCAL_APIC */
727
728 #ifdef  CONFIG_X86_IO_APIC
729 /*
730  * Parse IOAPIC related entries in MADT
731  * returns 0 on success, < 0 on error
732  */
733 static int __init acpi_parse_madt_ioapic_entries(void)
734 {
735         int count;
736
737         /*
738          * ACPI interpreter is required to complete interrupt setup,
739          * so if it is off, don't enumerate the io-apics with ACPI.
740          * If MPS is present, it will handle them,
741          * otherwise the system will stay in PIC mode
742          */
743         if (acpi_disabled || acpi_noirq) {
744                 return -ENODEV;
745         }
746
747         /*
748          * if "noapic" boot option, don't look for IO-APICs
749          */
750         if (skip_ioapic_setup) {
751                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
752                        "due to 'noapic' option.\n");
753                 return -ENODEV;
754         }
755
756         count =
757             acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
758                                   MAX_IO_APICS);
759         if (!count) {
760                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
761                 return -ENODEV;
762         } else if (count < 0) {
763                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
764                 return count;
765         }
766
767         count =
768             acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
769                                   NR_IRQ_VECTORS);
770         if (count < 0) {
771                 printk(KERN_ERR PREFIX
772                        "Error parsing interrupt source overrides entry\n");
773                 /* TBD: Cleanup to allow fallback to MPS */
774                 return count;
775         }
776
777         /*
778          * If BIOS did not supply an INT_SRC_OVR for the SCI
779          * pretend we got one so we can set the SCI flags.
780          */
781         if (!acpi_sci_override_gsi)
782                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
783
784         /* Fill in identity legacy mapings where no override */
785         mp_config_acpi_legacy_irqs();
786
787         count =
788             acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
789                                   NR_IRQ_VECTORS);
790         if (count < 0) {
791                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
792                 /* TBD: Cleanup to allow fallback to MPS */
793                 return count;
794         }
795
796         return 0;
797 }
798 #else
799 static inline int acpi_parse_madt_ioapic_entries(void)
800 {
801         return -1;
802 }
803 #endif  /* !CONFIG_X86_IO_APIC */
804
805 static void __init acpi_process_madt(void)
806 {
807 #ifdef CONFIG_X86_LOCAL_APIC
808         int count, error;
809
810         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
811         if (count >= 1) {
812
813                 /*
814                  * Parse MADT LAPIC entries
815                  */
816                 error = acpi_parse_madt_lapic_entries();
817                 if (!error) {
818                         acpi_lapic = 1;
819
820 #ifdef CONFIG_X86_GENERICARCH
821                         generic_bigsmp_probe();
822 #endif
823                         /*
824                          * Parse MADT IO-APIC entries
825                          */
826                         error = acpi_parse_madt_ioapic_entries();
827                         if (!error) {
828                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
829                                 acpi_irq_balance_set(NULL);
830                                 acpi_ioapic = 1;
831
832                                 smp_found_config = 1;
833                                 clustered_apic_check();
834                         }
835                 }
836                 if (error == -EINVAL) {
837                         /*
838                          * Dell Precision Workstation 410, 610 come here.
839                          */
840                         printk(KERN_ERR PREFIX
841                                "Invalid BIOS MADT, disabling ACPI\n");
842                         disable_acpi();
843                 }
844         }
845 #endif
846         return;
847 }
848
849 extern int acpi_force;
850
851 #ifdef __i386__
852
853 static int __init disable_acpi_irq(struct dmi_system_id *d)
854 {
855         if (!acpi_force) {
856                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
857                        d->ident);
858                 acpi_noirq_set();
859         }
860         return 0;
861 }
862
863 static int __init disable_acpi_pci(struct dmi_system_id *d)
864 {
865         if (!acpi_force) {
866                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
867                        d->ident);
868                 acpi_disable_pci();
869         }
870         return 0;
871 }
872
873 static int __init dmi_disable_acpi(struct dmi_system_id *d)
874 {
875         if (!acpi_force) {
876                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
877                 disable_acpi();
878         } else {
879                 printk(KERN_NOTICE
880                        "Warning: DMI blacklist says broken, but acpi forced\n");
881         }
882         return 0;
883 }
884
885 /*
886  * Limit ACPI to CPU enumeration for HT
887  */
888 static int __init force_acpi_ht(struct dmi_system_id *d)
889 {
890         if (!acpi_force) {
891                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
892                        d->ident);
893                 disable_acpi();
894                 acpi_ht = 1;
895         } else {
896                 printk(KERN_NOTICE
897                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
898         }
899         return 0;
900 }
901
902 /*
903  * If your system is blacklisted here, but you find that acpi=force
904  * works for you, please contact acpi-devel@sourceforge.net
905  */
906 static struct dmi_system_id __initdata acpi_dmi_table[] = {
907         /*
908          * Boxes that need ACPI disabled
909          */
910         {
911          .callback = dmi_disable_acpi,
912          .ident = "IBM Thinkpad",
913          .matches = {
914                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
915                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
916                      },
917          },
918
919         /*
920          * Boxes that need acpi=ht
921          */
922         {
923          .callback = force_acpi_ht,
924          .ident = "FSC Primergy T850",
925          .matches = {
926                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
927                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
928                      },
929          },
930         {
931          .callback = force_acpi_ht,
932          .ident = "DELL GX240",
933          .matches = {
934                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
935                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
936                      },
937          },
938         {
939          .callback = force_acpi_ht,
940          .ident = "HP VISUALIZE NT Workstation",
941          .matches = {
942                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
943                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
944                      },
945          },
946         {
947          .callback = force_acpi_ht,
948          .ident = "Compaq Workstation W8000",
949          .matches = {
950                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
951                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
952                      },
953          },
954         {
955          .callback = force_acpi_ht,
956          .ident = "ASUS P4B266",
957          .matches = {
958                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
959                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
960                      },
961          },
962         {
963          .callback = force_acpi_ht,
964          .ident = "ASUS P2B-DS",
965          .matches = {
966                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
967                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
968                      },
969          },
970         {
971          .callback = force_acpi_ht,
972          .ident = "ASUS CUR-DLS",
973          .matches = {
974                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
975                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
976                      },
977          },
978         {
979          .callback = force_acpi_ht,
980          .ident = "ABIT i440BX-W83977",
981          .matches = {
982                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
983                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
984                      },
985          },
986         {
987          .callback = force_acpi_ht,
988          .ident = "IBM Bladecenter",
989          .matches = {
990                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
991                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
992                      },
993          },
994         {
995          .callback = force_acpi_ht,
996          .ident = "IBM eServer xSeries 360",
997          .matches = {
998                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
999                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1000                      },
1001          },
1002         {
1003          .callback = force_acpi_ht,
1004          .ident = "IBM eserver xSeries 330",
1005          .matches = {
1006                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1007                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1008                      },
1009          },
1010         {
1011          .callback = force_acpi_ht,
1012          .ident = "IBM eserver xSeries 440",
1013          .matches = {
1014                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1015                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1016                      },
1017          },
1018
1019         /*
1020          * Boxes that need ACPI PCI IRQ routing disabled
1021          */
1022         {
1023          .callback = disable_acpi_irq,
1024          .ident = "ASUS A7V",
1025          .matches = {
1026                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1027                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1028                      /* newer BIOS, Revision 1011, does work */
1029                      DMI_MATCH(DMI_BIOS_VERSION,
1030                                "ASUS A7V ACPI BIOS Revision 1007"),
1031                      },
1032          },
1033
1034         /*
1035          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1036          */
1037         {                       /* _BBN 0 bug */
1038          .callback = disable_acpi_pci,
1039          .ident = "ASUS PR-DLS",
1040          .matches = {
1041                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1042                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1043                      DMI_MATCH(DMI_BIOS_VERSION,
1044                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1045                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1046                      },
1047          },
1048         {
1049          .callback = disable_acpi_pci,
1050          .ident = "Acer TravelMate 36x Laptop",
1051          .matches = {
1052                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1053                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1054                      },
1055          },
1056         {}
1057 };
1058
1059 #endif                          /* __i386__ */
1060
1061 /*
1062  * acpi_boot_table_init() and acpi_boot_init()
1063  *  called from setup_arch(), always.
1064  *      1. checksums all tables
1065  *      2. enumerates lapics
1066  *      3. enumerates io-apics
1067  *
1068  * acpi_table_init() is separate to allow reading SRAT without
1069  * other side effects.
1070  *
1071  * side effects of acpi_boot_init:
1072  *      acpi_lapic = 1 if LAPIC found
1073  *      acpi_ioapic = 1 if IOAPIC found
1074  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1075  *      if acpi_blacklisted() acpi_disabled = 1;
1076  *      acpi_irq_model=...
1077  *      ...
1078  *
1079  * return value: (currently ignored)
1080  *      0: success
1081  *      !0: failure
1082  */
1083
1084 int __init acpi_boot_table_init(void)
1085 {
1086         int error;
1087
1088 #ifdef __i386__
1089         dmi_check_system(acpi_dmi_table);
1090 #endif
1091
1092         /*
1093          * If acpi_disabled, bail out
1094          * One exception: acpi=ht continues far enough to enumerate LAPICs
1095          */
1096         if (acpi_disabled && !acpi_ht)
1097                 return 1;
1098
1099         /* 
1100          * Initialize the ACPI boot-time table parser.
1101          */
1102         error = acpi_table_init();
1103         if (error) {
1104                 disable_acpi();
1105                 return error;
1106         }
1107 #ifdef __i386__
1108         check_acpi_pci();
1109 #endif
1110
1111         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1112
1113         /*
1114          * blacklist may disable ACPI entirely
1115          */
1116         error = acpi_blacklisted();
1117         if (error) {
1118                 if (acpi_force) {
1119                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1120                 } else {
1121                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1122                         disable_acpi();
1123                         return error;
1124                 }
1125         }
1126
1127         return 0;
1128 }
1129
1130 int __init acpi_boot_init(void)
1131 {
1132         /*
1133          * If acpi_disabled, bail out
1134          * One exception: acpi=ht continues far enough to enumerate LAPICs
1135          */
1136         if (acpi_disabled && !acpi_ht)
1137                 return 1;
1138
1139         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1140
1141         /*
1142          * set sci_int and PM timer address
1143          */
1144         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1145
1146         /*
1147          * Process the Multiple APIC Description Table (MADT), if present
1148          */
1149         acpi_process_madt();
1150
1151         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1152
1153         return 0;
1154 }