Merge ../torvalds-2.6/
[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 {
45 }
46 extern void __init clustered_apic_check(void);
47 static inline int ioapic_setup_disabled(void)
48 {
49         return 0;
50 }
51
52 #include <asm/proto.h>
53
54 #else                           /* X86 */
55
56 #ifdef  CONFIG_X86_LOCAL_APIC
57 #include <mach_apic.h>
58 #include <mach_mpparse.h>
59 #endif                          /* CONFIG_X86_LOCAL_APIC */
60
61 #endif                          /* X86 */
62
63 #define BAD_MADT_ENTRY(entry, end) (                                        \
64                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
65                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
66
67 #define PREFIX                  "ACPI: "
68
69 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
70 int acpi_pci_disabled __initdata;       /* skip ACPI PCI scan and IRQ initialization */
71 int acpi_ht __initdata = 1;     /* enable HT */
72
73 int acpi_lapic;
74 int acpi_ioapic;
75 int acpi_strict;
76 EXPORT_SYMBOL(acpi_strict);
77
78 acpi_interrupt_flags acpi_sci_flags __initdata;
79 int acpi_sci_override_gsi __initdata;
80 int acpi_skip_timer_override __initdata;
81
82 #ifdef CONFIG_X86_LOCAL_APIC
83 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
84 #endif
85
86 #ifndef __HAVE_ARCH_CMPXCHG
87 #warning ACPI uses CMPXCHG, i486 and later hardware
88 #endif
89
90 #define MAX_MADT_ENTRIES        256
91 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
92     {[0 ... MAX_MADT_ENTRIES - 1] = 0xff };
93 EXPORT_SYMBOL(x86_acpiid_to_apicid);
94
95 /* --------------------------------------------------------------------------
96                               Boot-time Configuration
97    -------------------------------------------------------------------------- */
98
99 /*
100  * The default interrupt routing model is PIC (8259).  This gets
101  * overriden if IOAPICs are enumerated (below).
102  */
103 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
104
105 #ifdef  CONFIG_X86_64
106
107 /* rely on all ACPI tables being in the direct mapping */
108 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
109 {
110         if (!phys_addr || !size)
111                 return NULL;
112
113         if (phys_addr < (end_pfn_map << PAGE_SHIFT))
114                 return __va(phys_addr);
115
116         return NULL;
117 }
118
119 #else
120
121 /*
122  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
123  * to map the target physical address. The problem is that set_fixmap()
124  * provides a single page, and it is possible that the page is not
125  * sufficient.
126  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
127  * i.e. until the next __va_range() call.
128  *
129  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
130  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
131  * count idx down while incrementing the phys address.
132  */
133 char *__acpi_map_table(unsigned long phys, unsigned long size)
134 {
135         unsigned long base, offset, mapped_size;
136         int idx;
137
138         if (phys + size < 8 * 1024 * 1024)
139                 return __va(phys);
140
141         offset = phys & (PAGE_SIZE - 1);
142         mapped_size = PAGE_SIZE - offset;
143         set_fixmap(FIX_ACPI_END, phys);
144         base = fix_to_virt(FIX_ACPI_END);
145
146         /*
147          * Most cases can be covered by the below.
148          */
149         idx = FIX_ACPI_END;
150         while (mapped_size < size) {
151                 if (--idx < FIX_ACPI_BEGIN)
152                         return NULL;    /* cannot handle this */
153                 phys += PAGE_SIZE;
154                 set_fixmap(idx, phys);
155                 mapped_size += PAGE_SIZE;
156         }
157
158         return ((unsigned char *)base + offset);
159 }
160 #endif
161
162 #ifdef CONFIG_PCI_MMCONFIG
163 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
164 struct acpi_table_mcfg_config *pci_mmcfg_config;
165 int pci_mmcfg_config_num;
166
167 int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
168 {
169         struct acpi_table_mcfg *mcfg;
170         unsigned long i;
171         int config_size;
172
173         if (!phys_addr || !size)
174                 return -EINVAL;
175
176         mcfg = (struct acpi_table_mcfg *)__acpi_map_table(phys_addr, size);
177         if (!mcfg) {
178                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
179                 return -ENODEV;
180         }
181
182         /* how many config structures do we have */
183         pci_mmcfg_config_num = 0;
184         i = size - sizeof(struct acpi_table_mcfg);
185         while (i >= sizeof(struct acpi_table_mcfg_config)) {
186                 ++pci_mmcfg_config_num;
187                 i -= sizeof(struct acpi_table_mcfg_config);
188         };
189         if (pci_mmcfg_config_num == 0) {
190                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
191                 return -ENODEV;
192         }
193
194         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
195         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
196         if (!pci_mmcfg_config) {
197                 printk(KERN_WARNING PREFIX
198                        "No memory for MCFG config tables\n");
199                 return -ENOMEM;
200         }
201
202         memcpy(pci_mmcfg_config, &mcfg->config, config_size);
203         for (i = 0; i < pci_mmcfg_config_num; ++i) {
204                 if (mcfg->config[i].base_reserved) {
205                         printk(KERN_ERR PREFIX
206                                "MMCONFIG not in low 4GB of memory\n");
207                         return -ENODEV;
208                 }
209         }
210
211         return 0;
212 }
213 #endif                          /* CONFIG_PCI_MMCONFIG */
214
215 #ifdef CONFIG_X86_LOCAL_APIC
216 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
217 {
218         struct acpi_table_madt *madt = NULL;
219
220         if (!phys_addr || !size)
221                 return -EINVAL;
222
223         madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size);
224         if (!madt) {
225                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
226                 return -ENODEV;
227         }
228
229         if (madt->lapic_address) {
230                 acpi_lapic_addr = (u64) madt->lapic_address;
231
232                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
233                        madt->lapic_address);
234         }
235
236         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
237
238         return 0;
239 }
240
241 static int __init
242 acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
243 {
244         struct acpi_table_lapic *processor = NULL;
245
246         processor = (struct acpi_table_lapic *)header;
247
248         if (BAD_MADT_ENTRY(processor, end))
249                 return -EINVAL;
250
251         acpi_table_print_madt_entry(header);
252
253         /* no utility in registering a disabled processor */
254         if (processor->flags.enabled == 0)
255                 return 0;
256
257         x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
258
259         mp_register_lapic(processor->id,        /* APIC ID */
260                           processor->flags.enabled);    /* Enabled? */
261
262         return 0;
263 }
264
265 static int __init
266 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
267                           const unsigned long end)
268 {
269         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
270
271         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr *)header;
272
273         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
274                 return -EINVAL;
275
276         acpi_lapic_addr = lapic_addr_ovr->address;
277
278         return 0;
279 }
280
281 static int __init
282 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
283 {
284         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
285
286         lapic_nmi = (struct acpi_table_lapic_nmi *)header;
287
288         if (BAD_MADT_ENTRY(lapic_nmi, end))
289                 return -EINVAL;
290
291         acpi_table_print_madt_entry(header);
292
293         if (lapic_nmi->lint != 1)
294                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
295
296         return 0;
297 }
298
299 #endif                          /*CONFIG_X86_LOCAL_APIC */
300
301 #ifdef CONFIG_X86_IO_APIC
302
303 static int __init
304 acpi_parse_ioapic(acpi_table_entry_header * header, const unsigned long end)
305 {
306         struct acpi_table_ioapic *ioapic = NULL;
307
308         ioapic = (struct acpi_table_ioapic *)header;
309
310         if (BAD_MADT_ENTRY(ioapic, end))
311                 return -EINVAL;
312
313         acpi_table_print_madt_entry(header);
314
315         mp_register_ioapic(ioapic->id,
316                            ioapic->address, ioapic->global_irq_base);
317
318         return 0;
319 }
320
321 /*
322  * Parse Interrupt Source Override for the ACPI SCI
323  */
324 static void acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
325 {
326         if (trigger == 0)       /* compatible SCI trigger is level */
327                 trigger = 3;
328
329         if (polarity == 0)      /* compatible SCI polarity is low */
330                 polarity = 3;
331
332         /* Command-line over-ride via acpi_sci= */
333         if (acpi_sci_flags.trigger)
334                 trigger = acpi_sci_flags.trigger;
335
336         if (acpi_sci_flags.polarity)
337                 polarity = acpi_sci_flags.polarity;
338
339         /*
340          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
341          * If GSI is < 16, this will update its flags,
342          * else it will create a new mp_irqs[] entry.
343          */
344         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
345
346         /*
347          * stash over-ride to indicate we've been here
348          * and for later update of acpi_fadt
349          */
350         acpi_sci_override_gsi = gsi;
351         return;
352 }
353
354 static int __init
355 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
356                        const unsigned long end)
357 {
358         struct acpi_table_int_src_ovr *intsrc = NULL;
359
360         intsrc = (struct acpi_table_int_src_ovr *)header;
361
362         if (BAD_MADT_ENTRY(intsrc, end))
363                 return -EINVAL;
364
365         acpi_table_print_madt_entry(header);
366
367         if (intsrc->bus_irq == acpi_fadt.sci_int) {
368                 acpi_sci_ioapic_setup(intsrc->global_irq,
369                                       intsrc->flags.polarity,
370                                       intsrc->flags.trigger);
371                 return 0;
372         }
373
374         if (acpi_skip_timer_override &&
375             intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
376                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
377                 return 0;
378         }
379
380         mp_override_legacy_irq(intsrc->bus_irq,
381                                intsrc->flags.polarity,
382                                intsrc->flags.trigger, intsrc->global_irq);
383
384         return 0;
385 }
386
387 static int __init
388 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
389 {
390         struct acpi_table_nmi_src *nmi_src = NULL;
391
392         nmi_src = (struct acpi_table_nmi_src *)header;
393
394         if (BAD_MADT_ENTRY(nmi_src, end))
395                 return -EINVAL;
396
397         acpi_table_print_madt_entry(header);
398
399         /* TBD: Support nimsrc entries? */
400
401         return 0;
402 }
403
404 #endif                          /* CONFIG_X86_IO_APIC */
405
406 /*
407  * acpi_pic_sci_set_trigger()
408  * 
409  * use ELCR to set PIC-mode trigger type for SCI
410  *
411  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
412  * it may require Edge Trigger -- use "acpi_sci=edge"
413  *
414  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
415  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
416  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
417  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
418  */
419
420 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
421 {
422         unsigned int mask = 1 << irq;
423         unsigned int old, new;
424
425         /* Real old ELCR mask */
426         old = inb(0x4d0) | (inb(0x4d1) << 8);
427
428         /*
429          * If we use ACPI to set PCI irq's, then we should clear ELCR
430          * since we will set it correctly as we enable the PCI irq
431          * routing.
432          */
433         new = acpi_noirq ? old : 0;
434
435         /*
436          * Update SCI information in the ELCR, it isn't in the PCI
437          * routing tables..
438          */
439         switch (trigger) {
440         case 1:         /* Edge - clear */
441                 new &= ~mask;
442                 break;
443         case 3:         /* Level - set */
444                 new |= mask;
445                 break;
446         }
447
448         if (old == new)
449                 return;
450
451         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
452         outb(new, 0x4d0);
453         outb(new >> 8, 0x4d1);
454 }
455
456 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
457 {
458 #ifdef CONFIG_X86_IO_APIC
459         if (use_pci_vector() && !platform_legacy_irq(gsi))
460                 *irq = IO_APIC_VECTOR(gsi);
461         else
462 #endif
463                 *irq = gsi;
464         return 0;
465 }
466
467 /*
468  * success: return IRQ number (>=0)
469  * failure: return < 0
470  */
471 int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
472 {
473         unsigned int irq;
474         unsigned int plat_gsi = gsi;
475
476 #ifdef CONFIG_PCI
477         /*
478          * Make sure all (legacy) PCI IRQs are set as level-triggered.
479          */
480         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
481                 extern void eisa_set_level_irq(unsigned int irq);
482
483                 if (edge_level == ACPI_LEVEL_SENSITIVE)
484                         eisa_set_level_irq(gsi);
485         }
486 #endif
487
488 #ifdef CONFIG_X86_IO_APIC
489         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
490                 plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
491         }
492 #endif
493         acpi_gsi_to_irq(plat_gsi, &irq);
494         return irq;
495 }
496
497 EXPORT_SYMBOL(acpi_register_gsi);
498
499 /*
500  *  ACPI based hotplug support for CPU
501  */
502 #ifdef CONFIG_ACPI_HOTPLUG_CPU
503 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
504 {
505         /* TBD */
506         return -EINVAL;
507 }
508
509 EXPORT_SYMBOL(acpi_map_lsapic);
510
511 int acpi_unmap_lsapic(int cpu)
512 {
513         /* TBD */
514         return -EINVAL;
515 }
516
517 EXPORT_SYMBOL(acpi_unmap_lsapic);
518 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
519
520 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
521 {
522         /* TBD */
523         return -EINVAL;
524 }
525
526 EXPORT_SYMBOL(acpi_register_ioapic);
527
528 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
529 {
530         /* TBD */
531         return -EINVAL;
532 }
533
534 EXPORT_SYMBOL(acpi_unregister_ioapic);
535
536 static unsigned long __init
537 acpi_scan_rsdp(unsigned long start, unsigned long length)
538 {
539         unsigned long offset = 0;
540         unsigned long sig_len = sizeof("RSD PTR ") - 1;
541
542         /*
543          * Scan all 16-byte boundaries of the physical memory region for the
544          * RSDP signature.
545          */
546         for (offset = 0; offset < length; offset += 16) {
547                 if (strncmp((char *)(start + offset), "RSD PTR ", sig_len))
548                         continue;
549                 return (start + offset);
550         }
551
552         return 0;
553 }
554
555 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
556 {
557         struct acpi_table_sbf *sb;
558
559         if (!phys_addr || !size)
560                 return -EINVAL;
561
562         sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
563         if (!sb) {
564                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
565                 return -ENODEV;
566         }
567
568         sbf_port = sb->sbf_cmos;        /* Save CMOS port */
569
570         return 0;
571 }
572
573 #ifdef CONFIG_HPET_TIMER
574
575 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
576 {
577         struct acpi_table_hpet *hpet_tbl;
578
579         if (!phys || !size)
580                 return -EINVAL;
581
582         hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
583         if (!hpet_tbl) {
584                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
585                 return -ENODEV;
586         }
587
588         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
589                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
590                        "memory.\n");
591                 return -1;
592         }
593 #ifdef  CONFIG_X86_64
594         vxtime.hpet_address = hpet_tbl->addr.addrl |
595             ((long)hpet_tbl->addr.addrh << 32);
596
597         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
598                hpet_tbl->id, vxtime.hpet_address);
599 #else                           /* X86 */
600         {
601                 extern unsigned long hpet_address;
602
603                 hpet_address = hpet_tbl->addr.addrl;
604                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
605                        hpet_tbl->id, hpet_address);
606         }
607 #endif                          /* X86 */
608
609         return 0;
610 }
611 #else
612 #define acpi_parse_hpet NULL
613 #endif
614
615 #ifdef CONFIG_X86_PM_TIMER
616 extern u32 pmtmr_ioport;
617 #endif
618
619 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
620 {
621         struct fadt_descriptor_rev2 *fadt = NULL;
622
623         fadt = (struct fadt_descriptor_rev2 *)__acpi_map_table(phys, size);
624         if (!fadt) {
625                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
626                 return 0;
627         }
628         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
629         acpi_fadt.sci_int = fadt->sci_int;
630
631         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
632         acpi_fadt.revision = fadt->revision;
633         acpi_fadt.force_apic_physical_destination_mode =
634             fadt->force_apic_physical_destination_mode;
635
636 #ifdef CONFIG_X86_PM_TIMER
637         /* detect the location of the ACPI PM Timer */
638         if (fadt->revision >= FADT2_REVISION_ID) {
639                 /* FADT rev. 2 */
640                 if (fadt->xpm_tmr_blk.address_space_id !=
641                     ACPI_ADR_SPACE_SYSTEM_IO)
642                         return 0;
643
644                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
645         } else {
646                 /* FADT rev. 1 */
647                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
648         }
649         if (pmtmr_ioport)
650                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
651                        pmtmr_ioport);
652 #endif
653         return 0;
654 }
655
656 unsigned long __init acpi_find_rsdp(void)
657 {
658         unsigned long rsdp_phys = 0;
659
660         if (efi_enabled) {
661                 if (efi.acpi20)
662                         return __pa(efi.acpi20);
663                 else if (efi.acpi)
664                         return __pa(efi.acpi);
665         }
666         /*
667          * Scan memory looking for the RSDP signature. First search EBDA (low
668          * memory) paragraphs and then search upper memory (E0000-FFFFF).
669          */
670         rsdp_phys = acpi_scan_rsdp(0, 0x400);
671         if (!rsdp_phys)
672                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
673
674         return rsdp_phys;
675 }
676
677 #ifdef  CONFIG_X86_LOCAL_APIC
678 /*
679  * Parse LAPIC entries in MADT
680  * returns 0 on success, < 0 on error
681  */
682 static int __init acpi_parse_madt_lapic_entries(void)
683 {
684         int count;
685
686         /* 
687          * Note that the LAPIC address is obtained from the MADT (32-bit value)
688          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
689          */
690
691         count =
692             acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
693                                   acpi_parse_lapic_addr_ovr, 0);
694         if (count < 0) {
695                 printk(KERN_ERR PREFIX
696                        "Error parsing LAPIC address override entry\n");
697                 return count;
698         }
699
700         mp_register_lapic_address(acpi_lapic_addr);
701
702         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
703                                       MAX_APICS);
704         if (!count) {
705                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
706                 /* TBD: Cleanup to allow fallback to MPS */
707                 return -ENODEV;
708         } else if (count < 0) {
709                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
710                 /* TBD: Cleanup to allow fallback to MPS */
711                 return count;
712         }
713
714         count =
715             acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
716         if (count < 0) {
717                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
718                 /* TBD: Cleanup to allow fallback to MPS */
719                 return count;
720         }
721         return 0;
722 }
723 #endif                          /* CONFIG_X86_LOCAL_APIC */
724
725 #ifdef  CONFIG_X86_IO_APIC
726 /*
727  * Parse IOAPIC related entries in MADT
728  * returns 0 on success, < 0 on error
729  */
730 static int __init acpi_parse_madt_ioapic_entries(void)
731 {
732         int count;
733
734         /*
735          * ACPI interpreter is required to complete interrupt setup,
736          * so if it is off, don't enumerate the io-apics with ACPI.
737          * If MPS is present, it will handle them,
738          * otherwise the system will stay in PIC mode
739          */
740         if (acpi_disabled || acpi_noirq) {
741                 return -ENODEV;
742         }
743
744         /*
745          * if "noapic" boot option, don't look for IO-APICs
746          */
747         if (skip_ioapic_setup) {
748                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
749                        "due to 'noapic' option.\n");
750                 return -ENODEV;
751         }
752
753         count =
754             acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
755                                   MAX_IO_APICS);
756         if (!count) {
757                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
758                 return -ENODEV;
759         } else if (count < 0) {
760                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
761                 return count;
762         }
763
764         count =
765             acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
766                                   NR_IRQ_VECTORS);
767         if (count < 0) {
768                 printk(KERN_ERR PREFIX
769                        "Error parsing interrupt source overrides entry\n");
770                 /* TBD: Cleanup to allow fallback to MPS */
771                 return count;
772         }
773
774         /*
775          * If BIOS did not supply an INT_SRC_OVR for the SCI
776          * pretend we got one so we can set the SCI flags.
777          */
778         if (!acpi_sci_override_gsi)
779                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
780
781         /* Fill in identity legacy mapings where no override */
782         mp_config_acpi_legacy_irqs();
783
784         count =
785             acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
786                                   NR_IRQ_VECTORS);
787         if (count < 0) {
788                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
789                 /* TBD: Cleanup to allow fallback to MPS */
790                 return count;
791         }
792
793         return 0;
794 }
795 #else
796 static inline int acpi_parse_madt_ioapic_entries(void)
797 {
798         return -1;
799 }
800 #endif  /* !CONFIG_X86_IO_APIC */
801
802 static void __init acpi_process_madt(void)
803 {
804 #ifdef CONFIG_X86_LOCAL_APIC
805         int count, error;
806
807         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
808         if (count >= 1) {
809
810                 /*
811                  * Parse MADT LAPIC entries
812                  */
813                 error = acpi_parse_madt_lapic_entries();
814                 if (!error) {
815                         acpi_lapic = 1;
816
817 #ifdef CONFIG_X86_GENERICARCH
818                         generic_bigsmp_probe();
819 #endif
820                         /*
821                          * Parse MADT IO-APIC entries
822                          */
823                         error = acpi_parse_madt_ioapic_entries();
824                         if (!error) {
825                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
826                                 acpi_irq_balance_set(NULL);
827                                 acpi_ioapic = 1;
828
829                                 smp_found_config = 1;
830                                 clustered_apic_check();
831                         }
832                 }
833                 if (error == -EINVAL) {
834                         /*
835                          * Dell Precision Workstation 410, 610 come here.
836                          */
837                         printk(KERN_ERR PREFIX
838                                "Invalid BIOS MADT, disabling ACPI\n");
839                         disable_acpi();
840                 }
841         }
842 #endif
843         return;
844 }
845
846 extern int acpi_force;
847
848 #ifdef __i386__
849
850 static int __init disable_acpi_irq(struct dmi_system_id *d)
851 {
852         if (!acpi_force) {
853                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
854                        d->ident);
855                 acpi_noirq_set();
856         }
857         return 0;
858 }
859
860 static int __init disable_acpi_pci(struct dmi_system_id *d)
861 {
862         if (!acpi_force) {
863                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
864                        d->ident);
865                 acpi_disable_pci();
866         }
867         return 0;
868 }
869
870 static int __init dmi_disable_acpi(struct dmi_system_id *d)
871 {
872         if (!acpi_force) {
873                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
874                 disable_acpi();
875         } else {
876                 printk(KERN_NOTICE
877                        "Warning: DMI blacklist says broken, but acpi forced\n");
878         }
879         return 0;
880 }
881
882 /*
883  * Limit ACPI to CPU enumeration for HT
884  */
885 static int __init force_acpi_ht(struct dmi_system_id *d)
886 {
887         if (!acpi_force) {
888                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
889                        d->ident);
890                 disable_acpi();
891                 acpi_ht = 1;
892         } else {
893                 printk(KERN_NOTICE
894                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
895         }
896         return 0;
897 }
898
899 /*
900  * If your system is blacklisted here, but you find that acpi=force
901  * works for you, please contact acpi-devel@sourceforge.net
902  */
903 static struct dmi_system_id __initdata acpi_dmi_table[] = {
904         /*
905          * Boxes that need ACPI disabled
906          */
907         {
908          .callback = dmi_disable_acpi,
909          .ident = "IBM Thinkpad",
910          .matches = {
911                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
912                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
913                      },
914          },
915
916         /*
917          * Boxes that need acpi=ht
918          */
919         {
920          .callback = force_acpi_ht,
921          .ident = "FSC Primergy T850",
922          .matches = {
923                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
924                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
925                      },
926          },
927         {
928          .callback = force_acpi_ht,
929          .ident = "DELL GX240",
930          .matches = {
931                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
932                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
933                      },
934          },
935         {
936          .callback = force_acpi_ht,
937          .ident = "HP VISUALIZE NT Workstation",
938          .matches = {
939                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
940                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
941                      },
942          },
943         {
944          .callback = force_acpi_ht,
945          .ident = "Compaq Workstation W8000",
946          .matches = {
947                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
948                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
949                      },
950          },
951         {
952          .callback = force_acpi_ht,
953          .ident = "ASUS P4B266",
954          .matches = {
955                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
956                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
957                      },
958          },
959         {
960          .callback = force_acpi_ht,
961          .ident = "ASUS P2B-DS",
962          .matches = {
963                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
964                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
965                      },
966          },
967         {
968          .callback = force_acpi_ht,
969          .ident = "ASUS CUR-DLS",
970          .matches = {
971                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
972                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
973                      },
974          },
975         {
976          .callback = force_acpi_ht,
977          .ident = "ABIT i440BX-W83977",
978          .matches = {
979                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
980                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
981                      },
982          },
983         {
984          .callback = force_acpi_ht,
985          .ident = "IBM Bladecenter",
986          .matches = {
987                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
988                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
989                      },
990          },
991         {
992          .callback = force_acpi_ht,
993          .ident = "IBM eServer xSeries 360",
994          .matches = {
995                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
996                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
997                      },
998          },
999         {
1000          .callback = force_acpi_ht,
1001          .ident = "IBM eserver xSeries 330",
1002          .matches = {
1003                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1004                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1005                      },
1006          },
1007         {
1008          .callback = force_acpi_ht,
1009          .ident = "IBM eserver xSeries 440",
1010          .matches = {
1011                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1012                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1013                      },
1014          },
1015
1016         /*
1017          * Boxes that need ACPI PCI IRQ routing disabled
1018          */
1019         {
1020          .callback = disable_acpi_irq,
1021          .ident = "ASUS A7V",
1022          .matches = {
1023                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1024                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1025                      /* newer BIOS, Revision 1011, does work */
1026                      DMI_MATCH(DMI_BIOS_VERSION,
1027                                "ASUS A7V ACPI BIOS Revision 1007"),
1028                      },
1029          },
1030
1031         /*
1032          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1033          */
1034         {                       /* _BBN 0 bug */
1035          .callback = disable_acpi_pci,
1036          .ident = "ASUS PR-DLS",
1037          .matches = {
1038                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1039                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1040                      DMI_MATCH(DMI_BIOS_VERSION,
1041                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1042                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1043                      },
1044          },
1045         {
1046          .callback = disable_acpi_pci,
1047          .ident = "Acer TravelMate 36x Laptop",
1048          .matches = {
1049                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1050                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1051                      },
1052          },
1053         {}
1054 };
1055
1056 #endif                          /* __i386__ */
1057
1058 /*
1059  * acpi_boot_table_init() and acpi_boot_init()
1060  *  called from setup_arch(), always.
1061  *      1. checksums all tables
1062  *      2. enumerates lapics
1063  *      3. enumerates io-apics
1064  *
1065  * acpi_table_init() is separate to allow reading SRAT without
1066  * other side effects.
1067  *
1068  * side effects of acpi_boot_init:
1069  *      acpi_lapic = 1 if LAPIC found
1070  *      acpi_ioapic = 1 if IOAPIC found
1071  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1072  *      if acpi_blacklisted() acpi_disabled = 1;
1073  *      acpi_irq_model=...
1074  *      ...
1075  *
1076  * return value: (currently ignored)
1077  *      0: success
1078  *      !0: failure
1079  */
1080
1081 int __init acpi_boot_table_init(void)
1082 {
1083         int error;
1084
1085 #ifdef __i386__
1086         dmi_check_system(acpi_dmi_table);
1087 #endif
1088
1089         /*
1090          * If acpi_disabled, bail out
1091          * One exception: acpi=ht continues far enough to enumerate LAPICs
1092          */
1093         if (acpi_disabled && !acpi_ht)
1094                 return 1;
1095
1096         /* 
1097          * Initialize the ACPI boot-time table parser.
1098          */
1099         error = acpi_table_init();
1100         if (error) {
1101                 disable_acpi();
1102                 return error;
1103         }
1104 #ifdef __i386__
1105         check_acpi_pci();
1106 #endif
1107
1108         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1109
1110         /*
1111          * blacklist may disable ACPI entirely
1112          */
1113         error = acpi_blacklisted();
1114         if (error) {
1115                 if (acpi_force) {
1116                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1117                 } else {
1118                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1119                         disable_acpi();
1120                         return error;
1121                 }
1122         }
1123
1124         return 0;
1125 }
1126
1127 int __init acpi_boot_init(void)
1128 {
1129         /*
1130          * If acpi_disabled, bail out
1131          * One exception: acpi=ht continues far enough to enumerate LAPICs
1132          */
1133         if (acpi_disabled && !acpi_ht)
1134                 return 1;
1135
1136         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1137
1138         /*
1139          * set sci_int and PM timer address
1140          */
1141         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1142
1143         /*
1144          * Process the Multiple APIC Description Table (MADT), if present
1145          */
1146         acpi_process_madt();
1147
1148         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1149
1150         return 0;
1151 }