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