Merge branch 'upstream'
[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 static inline void acpi_madt_oem_check(char *oem_id, char *oem_table_id)
43 {
44 }
45 extern void __init clustered_apic_check(void);
46 static inline int ioapic_setup_disabled(void)
47 {
48         return 0;
49 }
50
51 #include <asm/proto.h>
52
53 #else                           /* X86 */
54
55 #ifdef  CONFIG_X86_LOCAL_APIC
56 #include <mach_apic.h>
57 #include <mach_mpparse.h>
58 #endif                          /* CONFIG_X86_LOCAL_APIC */
59
60 #endif                          /* X86 */
61
62 #define BAD_MADT_ENTRY(entry, end) (                                        \
63                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
64                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
65
66 #define PREFIX                  "ACPI: "
67
68 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
69 int acpi_pci_disabled __initdata;       /* skip ACPI PCI scan and IRQ initialization */
70 int acpi_ht __initdata = 1;     /* enable HT */
71
72 int acpi_lapic;
73 int acpi_ioapic;
74 int acpi_strict;
75 EXPORT_SYMBOL(acpi_strict);
76
77 acpi_interrupt_flags acpi_sci_flags __initdata;
78 int acpi_sci_override_gsi __initdata;
79 int acpi_skip_timer_override __initdata;
80
81 #ifdef CONFIG_X86_LOCAL_APIC
82 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
83 #endif
84
85 #ifndef __HAVE_ARCH_CMPXCHG
86 #warning ACPI uses CMPXCHG, i486 and later hardware
87 #endif
88
89 #define MAX_MADT_ENTRIES        256
90 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
91     {[0 ... MAX_MADT_ENTRIES - 1] = 0xff };
92 EXPORT_SYMBOL(x86_acpiid_to_apicid);
93
94 /* --------------------------------------------------------------------------
95                               Boot-time Configuration
96    -------------------------------------------------------------------------- */
97
98 /*
99  * The default interrupt routing model is PIC (8259).  This gets
100  * overriden if IOAPICs are enumerated (below).
101  */
102 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
103
104 #ifdef  CONFIG_X86_64
105
106 /* rely on all ACPI tables being in the direct mapping */
107 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
108 {
109         if (!phys_addr || !size)
110                 return NULL;
111
112         if (phys_addr < (end_pfn_map << PAGE_SHIFT))
113                 return __va(phys_addr);
114
115         return NULL;
116 }
117
118 #else
119
120 /*
121  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
122  * to map the target physical address. The problem is that set_fixmap()
123  * provides a single page, and it is possible that the page is not
124  * sufficient.
125  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
126  * i.e. until the next __va_range() call.
127  *
128  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
129  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
130  * count idx down while incrementing the phys address.
131  */
132 char *__acpi_map_table(unsigned long phys, unsigned long size)
133 {
134         unsigned long base, offset, mapped_size;
135         int idx;
136
137         if (phys + size < 8 * 1024 * 1024)
138                 return __va(phys);
139
140         offset = phys & (PAGE_SIZE - 1);
141         mapped_size = PAGE_SIZE - offset;
142         set_fixmap(FIX_ACPI_END, phys);
143         base = fix_to_virt(FIX_ACPI_END);
144
145         /*
146          * Most cases can be covered by the below.
147          */
148         idx = FIX_ACPI_END;
149         while (mapped_size < size) {
150                 if (--idx < FIX_ACPI_BEGIN)
151                         return NULL;    /* cannot handle this */
152                 phys += PAGE_SIZE;
153                 set_fixmap(idx, phys);
154                 mapped_size += PAGE_SIZE;
155         }
156
157         return ((unsigned char *)base + offset);
158 }
159 #endif
160
161 #ifdef CONFIG_PCI_MMCONFIG
162 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
163 struct acpi_table_mcfg_config *pci_mmcfg_config;
164 int pci_mmcfg_config_num;
165
166 int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
167 {
168         struct acpi_table_mcfg *mcfg;
169         unsigned long i;
170         int config_size;
171
172         if (!phys_addr || !size)
173                 return -EINVAL;
174
175         mcfg = (struct acpi_table_mcfg *)__acpi_map_table(phys_addr, size);
176         if (!mcfg) {
177                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
178                 return -ENODEV;
179         }
180
181         /* how many config structures do we have */
182         pci_mmcfg_config_num = 0;
183         i = size - sizeof(struct acpi_table_mcfg);
184         while (i >= sizeof(struct acpi_table_mcfg_config)) {
185                 ++pci_mmcfg_config_num;
186                 i -= sizeof(struct acpi_table_mcfg_config);
187         };
188         if (pci_mmcfg_config_num == 0) {
189                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
190                 return -ENODEV;
191         }
192
193         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
194         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
195         if (!pci_mmcfg_config) {
196                 printk(KERN_WARNING PREFIX
197                        "No memory for MCFG config tables\n");
198                 return -ENOMEM;
199         }
200
201         memcpy(pci_mmcfg_config, &mcfg->config, config_size);
202         for (i = 0; i < pci_mmcfg_config_num; ++i) {
203                 if (mcfg->config[i].base_reserved) {
204                         printk(KERN_ERR PREFIX
205                                "MMCONFIG not in low 4GB of memory\n");
206                         return -ENODEV;
207                 }
208         }
209
210         return 0;
211 }
212 #endif                          /* CONFIG_PCI_MMCONFIG */
213
214 #ifdef CONFIG_X86_LOCAL_APIC
215 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
216 {
217         struct acpi_table_madt *madt = NULL;
218
219         if (!phys_addr || !size)
220                 return -EINVAL;
221
222         madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size);
223         if (!madt) {
224                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
225                 return -ENODEV;
226         }
227
228         if (madt->lapic_address) {
229                 acpi_lapic_addr = (u64) madt->lapic_address;
230
231                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
232                        madt->lapic_address);
233         }
234
235         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
236
237         return 0;
238 }
239
240 static int __init
241 acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
242 {
243         struct acpi_table_lapic *processor = NULL;
244
245         processor = (struct acpi_table_lapic *)header;
246
247         if (BAD_MADT_ENTRY(processor, end))
248                 return -EINVAL;
249
250         acpi_table_print_madt_entry(header);
251
252         /* no utility in registering a disabled processor */
253         if (processor->flags.enabled == 0)
254                 return 0;
255
256         x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
257
258         mp_register_lapic(processor->id,        /* APIC ID */
259                           processor->flags.enabled);    /* Enabled? */
260
261         return 0;
262 }
263
264 static int __init
265 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
266                           const unsigned long end)
267 {
268         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
269
270         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr *)header;
271
272         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
273                 return -EINVAL;
274
275         acpi_lapic_addr = lapic_addr_ovr->address;
276
277         return 0;
278 }
279
280 static int __init
281 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
282 {
283         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
284
285         lapic_nmi = (struct acpi_table_lapic_nmi *)header;
286
287         if (BAD_MADT_ENTRY(lapic_nmi, end))
288                 return -EINVAL;
289
290         acpi_table_print_madt_entry(header);
291
292         if (lapic_nmi->lint != 1)
293                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
294
295         return 0;
296 }
297
298 #endif                          /*CONFIG_X86_LOCAL_APIC */
299
300 #ifdef CONFIG_X86_IO_APIC
301
302 static int __init
303 acpi_parse_ioapic(acpi_table_entry_header * header, const unsigned long end)
304 {
305         struct acpi_table_ioapic *ioapic = NULL;
306
307         ioapic = (struct acpi_table_ioapic *)header;
308
309         if (BAD_MADT_ENTRY(ioapic, end))
310                 return -EINVAL;
311
312         acpi_table_print_madt_entry(header);
313
314         mp_register_ioapic(ioapic->id,
315                            ioapic->address, ioapic->global_irq_base);
316
317         return 0;
318 }
319
320 /*
321  * Parse Interrupt Source Override for the ACPI SCI
322  */
323 static void acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
324 {
325         if (trigger == 0)       /* compatible SCI trigger is level */
326                 trigger = 3;
327
328         if (polarity == 0)      /* compatible SCI polarity is low */
329                 polarity = 3;
330
331         /* Command-line over-ride via acpi_sci= */
332         if (acpi_sci_flags.trigger)
333                 trigger = acpi_sci_flags.trigger;
334
335         if (acpi_sci_flags.polarity)
336                 polarity = acpi_sci_flags.polarity;
337
338         /*
339          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
340          * If GSI is < 16, this will update its flags,
341          * else it will create a new mp_irqs[] entry.
342          */
343         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
344
345         /*
346          * stash over-ride to indicate we've been here
347          * and for later update of acpi_fadt
348          */
349         acpi_sci_override_gsi = gsi;
350         return;
351 }
352
353 static int __init
354 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
355                        const unsigned long end)
356 {
357         struct acpi_table_int_src_ovr *intsrc = NULL;
358
359         intsrc = (struct acpi_table_int_src_ovr *)header;
360
361         if (BAD_MADT_ENTRY(intsrc, end))
362                 return -EINVAL;
363
364         acpi_table_print_madt_entry(header);
365
366         if (intsrc->bus_irq == acpi_fadt.sci_int) {
367                 acpi_sci_ioapic_setup(intsrc->global_irq,
368                                       intsrc->flags.polarity,
369                                       intsrc->flags.trigger);
370                 return 0;
371         }
372
373         if (acpi_skip_timer_override &&
374             intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
375                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
376                 return 0;
377         }
378
379         mp_override_legacy_irq(intsrc->bus_irq,
380                                intsrc->flags.polarity,
381                                intsrc->flags.trigger, intsrc->global_irq);
382
383         return 0;
384 }
385
386 static int __init
387 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
388 {
389         struct acpi_table_nmi_src *nmi_src = NULL;
390
391         nmi_src = (struct acpi_table_nmi_src *)header;
392
393         if (BAD_MADT_ENTRY(nmi_src, end))
394                 return -EINVAL;
395
396         acpi_table_print_madt_entry(header);
397
398         /* TBD: Support nimsrc entries? */
399
400         return 0;
401 }
402
403 #endif                          /* CONFIG_X86_IO_APIC */
404
405 /*
406  * acpi_pic_sci_set_trigger()
407  * 
408  * use ELCR to set PIC-mode trigger type for SCI
409  *
410  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
411  * it may require Edge Trigger -- use "acpi_sci=edge"
412  *
413  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
414  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
415  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
416  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
417  */
418
419 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
420 {
421         unsigned int mask = 1 << irq;
422         unsigned int old, new;
423
424         /* Real old ELCR mask */
425         old = inb(0x4d0) | (inb(0x4d1) << 8);
426
427         /*
428          * If we use ACPI to set PCI irq's, then we should clear ELCR
429          * since we will set it correctly as we enable the PCI irq
430          * routing.
431          */
432         new = acpi_noirq ? old : 0;
433
434         /*
435          * Update SCI information in the ELCR, it isn't in the PCI
436          * routing tables..
437          */
438         switch (trigger) {
439         case 1:         /* Edge - clear */
440                 new &= ~mask;
441                 break;
442         case 3:         /* Level - set */
443                 new |= mask;
444                 break;
445         }
446
447         if (old == new)
448                 return;
449
450         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
451         outb(new, 0x4d0);
452         outb(new >> 8, 0x4d1);
453 }
454
455 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
456 {
457 #ifdef CONFIG_X86_IO_APIC
458         if (use_pci_vector() && !platform_legacy_irq(gsi))
459                 *irq = IO_APIC_VECTOR(gsi);
460         else
461 #endif
462                 *irq = gsi;
463         return 0;
464 }
465
466 /*
467  * success: return IRQ number (>=0)
468  * failure: return < 0
469  */
470 int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
471 {
472         unsigned int irq;
473         unsigned int plat_gsi = gsi;
474
475 #ifdef CONFIG_PCI
476         /*
477          * Make sure all (legacy) PCI IRQs are set as level-triggered.
478          */
479         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
480                 extern void eisa_set_level_irq(unsigned int irq);
481
482                 if (edge_level == ACPI_LEVEL_SENSITIVE)
483                         eisa_set_level_irq(gsi);
484         }
485 #endif
486
487 #ifdef CONFIG_X86_IO_APIC
488         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
489                 plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
490         }
491 #endif
492         acpi_gsi_to_irq(plat_gsi, &irq);
493         return irq;
494 }
495
496 EXPORT_SYMBOL(acpi_register_gsi);
497
498 /*
499  *  ACPI based hotplug support for CPU
500  */
501 #ifdef CONFIG_ACPI_HOTPLUG_CPU
502 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
503 {
504         /* TBD */
505         return -EINVAL;
506 }
507
508 EXPORT_SYMBOL(acpi_map_lsapic);
509
510 int acpi_unmap_lsapic(int cpu)
511 {
512         /* TBD */
513         return -EINVAL;
514 }
515
516 EXPORT_SYMBOL(acpi_unmap_lsapic);
517 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
518
519 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
520 {
521         /* TBD */
522         return -EINVAL;
523 }
524
525 EXPORT_SYMBOL(acpi_register_ioapic);
526
527 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
528 {
529         /* TBD */
530         return -EINVAL;
531 }
532
533 EXPORT_SYMBOL(acpi_unregister_ioapic);
534
535 static unsigned long __init
536 acpi_scan_rsdp(unsigned long start, unsigned long length)
537 {
538         unsigned long offset = 0;
539         unsigned long sig_len = sizeof("RSD PTR ") - 1;
540
541         /*
542          * Scan all 16-byte boundaries of the physical memory region for the
543          * RSDP signature.
544          */
545         for (offset = 0; offset < length; offset += 16) {
546                 if (strncmp((char *)(start + offset), "RSD PTR ", sig_len))
547                         continue;
548                 return (start + offset);
549         }
550
551         return 0;
552 }
553
554 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
555 {
556         struct acpi_table_sbf *sb;
557
558         if (!phys_addr || !size)
559                 return -EINVAL;
560
561         sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
562         if (!sb) {
563                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
564                 return -ENODEV;
565         }
566
567         sbf_port = sb->sbf_cmos;        /* Save CMOS port */
568
569         return 0;
570 }
571
572 #ifdef CONFIG_HPET_TIMER
573
574 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
575 {
576         struct acpi_table_hpet *hpet_tbl;
577
578         if (!phys || !size)
579                 return -EINVAL;
580
581         hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
582         if (!hpet_tbl) {
583                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
584                 return -ENODEV;
585         }
586
587         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
588                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
589                        "memory.\n");
590                 return -1;
591         }
592 #ifdef  CONFIG_X86_64
593         vxtime.hpet_address = hpet_tbl->addr.addrl |
594             ((long)hpet_tbl->addr.addrh << 32);
595
596         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
597                hpet_tbl->id, vxtime.hpet_address);
598 #else                           /* X86 */
599         {
600                 extern unsigned long hpet_address;
601
602                 hpet_address = hpet_tbl->addr.addrl;
603                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
604                        hpet_tbl->id, hpet_address);
605         }
606 #endif                          /* X86 */
607
608         return 0;
609 }
610 #else
611 #define acpi_parse_hpet NULL
612 #endif
613
614 #ifdef CONFIG_X86_PM_TIMER
615 extern u32 pmtmr_ioport;
616 #endif
617
618 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
619 {
620         struct fadt_descriptor_rev2 *fadt = NULL;
621
622         fadt = (struct fadt_descriptor_rev2 *)__acpi_map_table(phys, size);
623         if (!fadt) {
624                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
625                 return 0;
626         }
627         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
628         acpi_fadt.sci_int = fadt->sci_int;
629
630         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
631         acpi_fadt.revision = fadt->revision;
632         acpi_fadt.force_apic_physical_destination_mode =
633             fadt->force_apic_physical_destination_mode;
634
635 #ifdef CONFIG_X86_PM_TIMER
636         /* detect the location of the ACPI PM Timer */
637         if (fadt->revision >= FADT2_REVISION_ID) {
638                 /* FADT rev. 2 */
639                 if (fadt->xpm_tmr_blk.address_space_id !=
640                     ACPI_ADR_SPACE_SYSTEM_IO)
641                         return 0;
642
643                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
644         } else {
645                 /* FADT rev. 1 */
646                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
647         }
648         if (pmtmr_ioport)
649                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
650                        pmtmr_ioport);
651 #endif
652         return 0;
653 }
654
655 unsigned long __init acpi_find_rsdp(void)
656 {
657         unsigned long rsdp_phys = 0;
658
659         if (efi_enabled) {
660                 if (efi.acpi20)
661                         return __pa(efi.acpi20);
662                 else if (efi.acpi)
663                         return __pa(efi.acpi);
664         }
665         /*
666          * Scan memory looking for the RSDP signature. First search EBDA (low
667          * memory) paragraphs and then search upper memory (E0000-FFFFF).
668          */
669         rsdp_phys = acpi_scan_rsdp(0, 0x400);
670         if (!rsdp_phys)
671                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
672
673         return rsdp_phys;
674 }
675
676 #ifdef  CONFIG_X86_LOCAL_APIC
677 /*
678  * Parse LAPIC entries in MADT
679  * returns 0 on success, < 0 on error
680  */
681 static int __init acpi_parse_madt_lapic_entries(void)
682 {
683         int count;
684
685         /* 
686          * Note that the LAPIC address is obtained from the MADT (32-bit value)
687          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
688          */
689
690         count =
691             acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
692                                   acpi_parse_lapic_addr_ovr, 0);
693         if (count < 0) {
694                 printk(KERN_ERR PREFIX
695                        "Error parsing LAPIC address override entry\n");
696                 return count;
697         }
698
699         mp_register_lapic_address(acpi_lapic_addr);
700
701         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
702                                       MAX_APICS);
703         if (!count) {
704                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
705                 /* TBD: Cleanup to allow fallback to MPS */
706                 return -ENODEV;
707         } else if (count < 0) {
708                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
709                 /* TBD: Cleanup to allow fallback to MPS */
710                 return count;
711         }
712
713         count =
714             acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
715         if (count < 0) {
716                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
717                 /* TBD: Cleanup to allow fallback to MPS */
718                 return count;
719         }
720         return 0;
721 }
722 #endif                          /* CONFIG_X86_LOCAL_APIC */
723
724 #ifdef  CONFIG_X86_IO_APIC
725 /*
726  * Parse IOAPIC related entries in MADT
727  * returns 0 on success, < 0 on error
728  */
729 static int __init acpi_parse_madt_ioapic_entries(void)
730 {
731         int count;
732
733         /*
734          * ACPI interpreter is required to complete interrupt setup,
735          * so if it is off, don't enumerate the io-apics with ACPI.
736          * If MPS is present, it will handle them,
737          * otherwise the system will stay in PIC mode
738          */
739         if (acpi_disabled || acpi_noirq) {
740                 return -ENODEV;
741         }
742
743         /*
744          * if "noapic" boot option, don't look for IO-APICs
745          */
746         if (skip_ioapic_setup) {
747                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
748                        "due to 'noapic' option.\n");
749                 return -ENODEV;
750         }
751
752         count =
753             acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
754                                   MAX_IO_APICS);
755         if (!count) {
756                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
757                 return -ENODEV;
758         } else if (count < 0) {
759                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
760                 return count;
761         }
762
763         count =
764             acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
765                                   NR_IRQ_VECTORS);
766         if (count < 0) {
767                 printk(KERN_ERR PREFIX
768                        "Error parsing interrupt source overrides entry\n");
769                 /* TBD: Cleanup to allow fallback to MPS */
770                 return count;
771         }
772
773         /*
774          * If BIOS did not supply an INT_SRC_OVR for the SCI
775          * pretend we got one so we can set the SCI flags.
776          */
777         if (!acpi_sci_override_gsi)
778                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
779
780         /* Fill in identity legacy mapings where no override */
781         mp_config_acpi_legacy_irqs();
782
783         count =
784             acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
785                                   NR_IRQ_VECTORS);
786         if (count < 0) {
787                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
788                 /* TBD: Cleanup to allow fallback to MPS */
789                 return count;
790         }
791
792         return 0;
793 }
794 #else
795 static inline int acpi_parse_madt_ioapic_entries(void)
796 {
797         return -1;
798 }
799 #endif  /* !CONFIG_X86_IO_APIC */
800
801 static void __init acpi_process_madt(void)
802 {
803 #ifdef CONFIG_X86_LOCAL_APIC
804         int count, error;
805
806         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
807         if (count >= 1) {
808
809                 /*
810                  * Parse MADT LAPIC entries
811                  */
812                 error = acpi_parse_madt_lapic_entries();
813                 if (!error) {
814                         acpi_lapic = 1;
815
816 #ifdef CONFIG_X86_GENERICARCH
817                         generic_bigsmp_probe();
818 #endif
819                         /*
820                          * Parse MADT IO-APIC entries
821                          */
822                         error = acpi_parse_madt_ioapic_entries();
823                         if (!error) {
824                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
825                                 acpi_irq_balance_set(NULL);
826                                 acpi_ioapic = 1;
827
828                                 smp_found_config = 1;
829                                 clustered_apic_check();
830                         }
831                 }
832                 if (error == -EINVAL) {
833                         /*
834                          * Dell Precision Workstation 410, 610 come here.
835                          */
836                         printk(KERN_ERR PREFIX
837                                "Invalid BIOS MADT, disabling ACPI\n");
838                         disable_acpi();
839                 }
840         }
841 #endif
842         return;
843 }
844
845 extern int acpi_force;
846
847 #ifdef __i386__
848
849 static int __init disable_acpi_irq(struct dmi_system_id *d)
850 {
851         if (!acpi_force) {
852                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
853                        d->ident);
854                 acpi_noirq_set();
855         }
856         return 0;
857 }
858
859 static int __init disable_acpi_pci(struct dmi_system_id *d)
860 {
861         if (!acpi_force) {
862                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
863                        d->ident);
864                 acpi_disable_pci();
865         }
866         return 0;
867 }
868
869 static int __init dmi_disable_acpi(struct dmi_system_id *d)
870 {
871         if (!acpi_force) {
872                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
873                 disable_acpi();
874         } else {
875                 printk(KERN_NOTICE
876                        "Warning: DMI blacklist says broken, but acpi forced\n");
877         }
878         return 0;
879 }
880
881 /*
882  * Limit ACPI to CPU enumeration for HT
883  */
884 static int __init force_acpi_ht(struct dmi_system_id *d)
885 {
886         if (!acpi_force) {
887                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
888                        d->ident);
889                 disable_acpi();
890                 acpi_ht = 1;
891         } else {
892                 printk(KERN_NOTICE
893                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
894         }
895         return 0;
896 }
897
898 /*
899  * If your system is blacklisted here, but you find that acpi=force
900  * works for you, please contact acpi-devel@sourceforge.net
901  */
902 static struct dmi_system_id __initdata acpi_dmi_table[] = {
903         /*
904          * Boxes that need ACPI disabled
905          */
906         {
907          .callback = dmi_disable_acpi,
908          .ident = "IBM Thinkpad",
909          .matches = {
910                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
911                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
912                      },
913          },
914
915         /*
916          * Boxes that need acpi=ht
917          */
918         {
919          .callback = force_acpi_ht,
920          .ident = "FSC Primergy T850",
921          .matches = {
922                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
923                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
924                      },
925          },
926         {
927          .callback = force_acpi_ht,
928          .ident = "DELL GX240",
929          .matches = {
930                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
931                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
932                      },
933          },
934         {
935          .callback = force_acpi_ht,
936          .ident = "HP VISUALIZE NT Workstation",
937          .matches = {
938                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
939                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
940                      },
941          },
942         {
943          .callback = force_acpi_ht,
944          .ident = "Compaq Workstation W8000",
945          .matches = {
946                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
947                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
948                      },
949          },
950         {
951          .callback = force_acpi_ht,
952          .ident = "ASUS P4B266",
953          .matches = {
954                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
955                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
956                      },
957          },
958         {
959          .callback = force_acpi_ht,
960          .ident = "ASUS P2B-DS",
961          .matches = {
962                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
963                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
964                      },
965          },
966         {
967          .callback = force_acpi_ht,
968          .ident = "ASUS CUR-DLS",
969          .matches = {
970                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
971                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
972                      },
973          },
974         {
975          .callback = force_acpi_ht,
976          .ident = "ABIT i440BX-W83977",
977          .matches = {
978                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
979                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
980                      },
981          },
982         {
983          .callback = force_acpi_ht,
984          .ident = "IBM Bladecenter",
985          .matches = {
986                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
987                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
988                      },
989          },
990         {
991          .callback = force_acpi_ht,
992          .ident = "IBM eServer xSeries 360",
993          .matches = {
994                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
995                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
996                      },
997          },
998         {
999          .callback = force_acpi_ht,
1000          .ident = "IBM eserver xSeries 330",
1001          .matches = {
1002                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1003                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1004                      },
1005          },
1006         {
1007          .callback = force_acpi_ht,
1008          .ident = "IBM eserver xSeries 440",
1009          .matches = {
1010                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1011                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1012                      },
1013          },
1014
1015         /*
1016          * Boxes that need ACPI PCI IRQ routing disabled
1017          */
1018         {
1019          .callback = disable_acpi_irq,
1020          .ident = "ASUS A7V",
1021          .matches = {
1022                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1023                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1024                      /* newer BIOS, Revision 1011, does work */
1025                      DMI_MATCH(DMI_BIOS_VERSION,
1026                                "ASUS A7V ACPI BIOS Revision 1007"),
1027                      },
1028          },
1029
1030         /*
1031          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1032          */
1033         {                       /* _BBN 0 bug */
1034          .callback = disable_acpi_pci,
1035          .ident = "ASUS PR-DLS",
1036          .matches = {
1037                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1038                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1039                      DMI_MATCH(DMI_BIOS_VERSION,
1040                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1041                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1042                      },
1043          },
1044         {
1045          .callback = disable_acpi_pci,
1046          .ident = "Acer TravelMate 36x Laptop",
1047          .matches = {
1048                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1049                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1050                      },
1051          },
1052         {}
1053 };
1054
1055 #endif                          /* __i386__ */
1056
1057 /*
1058  * acpi_boot_table_init() and acpi_boot_init()
1059  *  called from setup_arch(), always.
1060  *      1. checksums all tables
1061  *      2. enumerates lapics
1062  *      3. enumerates io-apics
1063  *
1064  * acpi_table_init() is separate to allow reading SRAT without
1065  * other side effects.
1066  *
1067  * side effects of acpi_boot_init:
1068  *      acpi_lapic = 1 if LAPIC found
1069  *      acpi_ioapic = 1 if IOAPIC found
1070  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1071  *      if acpi_blacklisted() acpi_disabled = 1;
1072  *      acpi_irq_model=...
1073  *      ...
1074  *
1075  * return value: (currently ignored)
1076  *      0: success
1077  *      !0: failure
1078  */
1079
1080 int __init acpi_boot_table_init(void)
1081 {
1082         int error;
1083
1084 #ifdef __i386__
1085         dmi_check_system(acpi_dmi_table);
1086 #endif
1087
1088         /*
1089          * If acpi_disabled, bail out
1090          * One exception: acpi=ht continues far enough to enumerate LAPICs
1091          */
1092         if (acpi_disabled && !acpi_ht)
1093                 return 1;
1094
1095         /* 
1096          * Initialize the ACPI boot-time table parser.
1097          */
1098         error = acpi_table_init();
1099         if (error) {
1100                 disable_acpi();
1101                 return error;
1102         }
1103 #ifdef __i386__
1104         check_acpi_pci();
1105 #endif
1106
1107         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1108
1109         /*
1110          * blacklist may disable ACPI entirely
1111          */
1112         error = acpi_blacklisted();
1113         if (error) {
1114                 if (acpi_force) {
1115                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1116                 } else {
1117                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1118                         disable_acpi();
1119                         return error;
1120                 }
1121         }
1122
1123         return 0;
1124 }
1125
1126 int __init acpi_boot_init(void)
1127 {
1128         /*
1129          * If acpi_disabled, bail out
1130          * One exception: acpi=ht continues far enough to enumerate LAPICs
1131          */
1132         if (acpi_disabled && !acpi_ht)
1133                 return 1;
1134
1135         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1136
1137         /*
1138          * set sci_int and PM timer address
1139          */
1140         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1141
1142         /*
1143          * Process the Multiple APIC Description Table (MADT), if present
1144          */
1145         acpi_process_madt();
1146
1147         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1148
1149         return 0;
1150 }