[ACPI] Lindent created a syntax error that broke the build
[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 #ifdef CONFIG_ACPI_PCI
70 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
71 int acpi_pci_disabled __initdata;       /* skip ACPI PCI scan and IRQ initialization */
72 #else
73 int acpi_noirq __initdata = 1;
74 int acpi_pci_disabled __initdata = 1;
75 #endif
76 int acpi_ht __initdata = 1;     /* enable HT */
77
78 int acpi_lapic;
79 int acpi_ioapic;
80 int acpi_strict;
81 EXPORT_SYMBOL(acpi_strict);
82
83 acpi_interrupt_flags acpi_sci_flags __initdata;
84 int acpi_sci_override_gsi __initdata;
85 int acpi_skip_timer_override __initdata;
86
87 #ifdef CONFIG_X86_LOCAL_APIC
88 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
89 #endif
90
91 #ifndef __HAVE_ARCH_CMPXCHG
92 #warning ACPI uses CMPXCHG, i486 and later hardware
93 #endif
94
95 #define MAX_MADT_ENTRIES        256
96 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
97     {[0 ... MAX_MADT_ENTRIES - 1] = 0xff };
98 EXPORT_SYMBOL(x86_acpiid_to_apicid);
99
100 /* --------------------------------------------------------------------------
101                               Boot-time Configuration
102    -------------------------------------------------------------------------- */
103
104 /*
105  * The default interrupt routing model is PIC (8259).  This gets
106  * overriden if IOAPICs are enumerated (below).
107  */
108 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
109
110 #ifdef  CONFIG_X86_64
111
112 /* rely on all ACPI tables being in the direct mapping */
113 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
114 {
115         if (!phys_addr || !size)
116                 return NULL;
117
118         if (phys_addr < (end_pfn_map << PAGE_SHIFT))
119                 return __va(phys_addr);
120
121         return NULL;
122 }
123
124 #else
125
126 /*
127  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
128  * to map the target physical address. The problem is that set_fixmap()
129  * provides a single page, and it is possible that the page is not
130  * sufficient.
131  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
132  * i.e. until the next __va_range() call.
133  *
134  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
135  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
136  * count idx down while incrementing the phys address.
137  */
138 char *__acpi_map_table(unsigned long phys, unsigned long size)
139 {
140         unsigned long base, offset, mapped_size;
141         int idx;
142
143         if (phys + size < 8 * 1024 * 1024)
144                 return __va(phys);
145
146         offset = phys & (PAGE_SIZE - 1);
147         mapped_size = PAGE_SIZE - offset;
148         set_fixmap(FIX_ACPI_END, phys);
149         base = fix_to_virt(FIX_ACPI_END);
150
151         /*
152          * Most cases can be covered by the below.
153          */
154         idx = FIX_ACPI_END;
155         while (mapped_size < size) {
156                 if (--idx < FIX_ACPI_BEGIN)
157                         return NULL;    /* cannot handle this */
158                 phys += PAGE_SIZE;
159                 set_fixmap(idx, phys);
160                 mapped_size += PAGE_SIZE;
161         }
162
163         return ((unsigned char *)base + offset);
164 }
165 #endif
166
167 #ifdef CONFIG_PCI_MMCONFIG
168 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
169 struct acpi_table_mcfg_config *pci_mmcfg_config;
170 int pci_mmcfg_config_num;
171
172 int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
173 {
174         struct acpi_table_mcfg *mcfg;
175         unsigned long i;
176         int config_size;
177
178         if (!phys_addr || !size)
179                 return -EINVAL;
180
181         mcfg = (struct acpi_table_mcfg *)__acpi_map_table(phys_addr, size);
182         if (!mcfg) {
183                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
184                 return -ENODEV;
185         }
186
187         /* how many config structures do we have */
188         pci_mmcfg_config_num = 0;
189         i = size - sizeof(struct acpi_table_mcfg);
190         while (i >= sizeof(struct acpi_table_mcfg_config)) {
191                 ++pci_mmcfg_config_num;
192                 i -= sizeof(struct acpi_table_mcfg_config);
193         };
194         if (pci_mmcfg_config_num == 0) {
195                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
196                 return -ENODEV;
197         }
198
199         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
200         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
201         if (!pci_mmcfg_config) {
202                 printk(KERN_WARNING PREFIX
203                        "No memory for MCFG config tables\n");
204                 return -ENOMEM;
205         }
206
207         memcpy(pci_mmcfg_config, &mcfg->config, config_size);
208         for (i = 0; i < pci_mmcfg_config_num; ++i) {
209                 if (mcfg->config[i].base_reserved) {
210                         printk(KERN_ERR PREFIX
211                                "MMCONFIG not in low 4GB of memory\n");
212                         return -ENODEV;
213                 }
214         }
215
216         return 0;
217 }
218 #endif                          /* CONFIG_PCI_MMCONFIG */
219
220 #ifdef CONFIG_X86_LOCAL_APIC
221 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
222 {
223         struct acpi_table_madt *madt = NULL;
224
225         if (!phys_addr || !size)
226                 return -EINVAL;
227
228         madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size);
229         if (!madt) {
230                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
231                 return -ENODEV;
232         }
233
234         if (madt->lapic_address) {
235                 acpi_lapic_addr = (u64) madt->lapic_address;
236
237                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
238                        madt->lapic_address);
239         }
240
241         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
242
243         return 0;
244 }
245
246 static int __init
247 acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
248 {
249         struct acpi_table_lapic *processor = NULL;
250
251         processor = (struct acpi_table_lapic *)header;
252
253         if (BAD_MADT_ENTRY(processor, end))
254                 return -EINVAL;
255
256         acpi_table_print_madt_entry(header);
257
258         /* no utility in registering a disabled processor */
259         if (processor->flags.enabled == 0)
260                 return 0;
261
262         x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
263
264         mp_register_lapic(processor->id,        /* APIC ID */
265                           processor->flags.enabled);    /* Enabled? */
266
267         return 0;
268 }
269
270 static int __init
271 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
272                           const unsigned long end)
273 {
274         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
275
276         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr *)header;
277
278         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
279                 return -EINVAL;
280
281         acpi_lapic_addr = lapic_addr_ovr->address;
282
283         return 0;
284 }
285
286 static int __init
287 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
288 {
289         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
290
291         lapic_nmi = (struct acpi_table_lapic_nmi *)header;
292
293         if (BAD_MADT_ENTRY(lapic_nmi, end))
294                 return -EINVAL;
295
296         acpi_table_print_madt_entry(header);
297
298         if (lapic_nmi->lint != 1)
299                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
300
301         return 0;
302 }
303
304 #endif                          /*CONFIG_X86_LOCAL_APIC */
305
306 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
307
308 static int __init
309 acpi_parse_ioapic(acpi_table_entry_header * header, const unsigned long end)
310 {
311         struct acpi_table_ioapic *ioapic = NULL;
312
313         ioapic = (struct acpi_table_ioapic *)header;
314
315         if (BAD_MADT_ENTRY(ioapic, end))
316                 return -EINVAL;
317
318         acpi_table_print_madt_entry(header);
319
320         mp_register_ioapic(ioapic->id,
321                            ioapic->address, ioapic->global_irq_base);
322
323         return 0;
324 }
325
326 /*
327  * Parse Interrupt Source Override for the ACPI SCI
328  */
329 static void acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
330 {
331         if (trigger == 0)       /* compatible SCI trigger is level */
332                 trigger = 3;
333
334         if (polarity == 0)      /* compatible SCI polarity is low */
335                 polarity = 3;
336
337         /* Command-line over-ride via acpi_sci= */
338         if (acpi_sci_flags.trigger)
339                 trigger = acpi_sci_flags.trigger;
340
341         if (acpi_sci_flags.polarity)
342                 polarity = acpi_sci_flags.polarity;
343
344         /*
345          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
346          * If GSI is < 16, this will update its flags,
347          * else it will create a new mp_irqs[] entry.
348          */
349         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
350
351         /*
352          * stash over-ride to indicate we've been here
353          * and for later update of acpi_fadt
354          */
355         acpi_sci_override_gsi = gsi;
356         return;
357 }
358
359 static int __init
360 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
361                        const unsigned long end)
362 {
363         struct acpi_table_int_src_ovr *intsrc = NULL;
364
365         intsrc = (struct acpi_table_int_src_ovr *)header;
366
367         if (BAD_MADT_ENTRY(intsrc, end))
368                 return -EINVAL;
369
370         acpi_table_print_madt_entry(header);
371
372         if (intsrc->bus_irq == acpi_fadt.sci_int) {
373                 acpi_sci_ioapic_setup(intsrc->global_irq,
374                                       intsrc->flags.polarity,
375                                       intsrc->flags.trigger);
376                 return 0;
377         }
378
379         if (acpi_skip_timer_override &&
380             intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
381                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
382                 return 0;
383         }
384
385         mp_override_legacy_irq(intsrc->bus_irq,
386                                intsrc->flags.polarity,
387                                intsrc->flags.trigger, intsrc->global_irq);
388
389         return 0;
390 }
391
392 static int __init
393 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
394 {
395         struct acpi_table_nmi_src *nmi_src = NULL;
396
397         nmi_src = (struct acpi_table_nmi_src *)header;
398
399         if (BAD_MADT_ENTRY(nmi_src, end))
400                 return -EINVAL;
401
402         acpi_table_print_madt_entry(header);
403
404         /* TBD: Support nimsrc entries? */
405
406         return 0;
407 }
408
409 #endif                          /* CONFIG_X86_IO_APIC */
410
411 #ifdef  CONFIG_ACPI_BUS
412
413 /*
414  * acpi_pic_sci_set_trigger()
415  * 
416  * use ELCR to set PIC-mode trigger type for SCI
417  *
418  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
419  * it may require Edge Trigger -- use "acpi_sci=edge"
420  *
421  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
422  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
423  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
424  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
425  */
426
427 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
428 {
429         unsigned int mask = 1 << irq;
430         unsigned int old, new;
431
432         /* Real old ELCR mask */
433         old = inb(0x4d0) | (inb(0x4d1) << 8);
434
435         /*
436          * If we use ACPI to set PCI irq's, then we should clear ELCR
437          * since we will set it correctly as we enable the PCI irq
438          * routing.
439          */
440         new = acpi_noirq ? old : 0;
441
442         /*
443          * Update SCI information in the ELCR, it isn't in the PCI
444          * routing tables..
445          */
446         switch (trigger) {
447         case 1:         /* Edge - clear */
448                 new &= ~mask;
449                 break;
450         case 3:         /* Level - set */
451                 new |= mask;
452                 break;
453         }
454
455         if (old == new)
456                 return;
457
458         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
459         outb(new, 0x4d0);
460         outb(new >> 8, 0x4d1);
461 }
462
463 #endif                          /* CONFIG_ACPI_BUS */
464
465 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
466 {
467 #ifdef CONFIG_X86_IO_APIC
468         if (use_pci_vector() && !platform_legacy_irq(gsi))
469                 *irq = IO_APIC_VECTOR(gsi);
470         else
471 #endif
472                 *irq = gsi;
473         return 0;
474 }
475
476 /*
477  * success: return IRQ number (>=0)
478  * failure: return < 0
479  */
480 int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
481 {
482         unsigned int irq;
483         unsigned int plat_gsi = gsi;
484
485 #ifdef CONFIG_PCI
486         /*
487          * Make sure all (legacy) PCI IRQs are set as level-triggered.
488          */
489         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
490                 extern void eisa_set_level_irq(unsigned int irq);
491
492                 if (edge_level == ACPI_LEVEL_SENSITIVE)
493                         eisa_set_level_irq(gsi);
494         }
495 #endif
496
497 #ifdef CONFIG_X86_IO_APIC
498         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
499                 plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
500         }
501 #endif
502         acpi_gsi_to_irq(plat_gsi, &irq);
503         return irq;
504 }
505
506 EXPORT_SYMBOL(acpi_register_gsi);
507
508 /*
509  *  ACPI based hotplug support for CPU
510  */
511 #ifdef CONFIG_ACPI_HOTPLUG_CPU
512 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
513 {
514         /* TBD */
515         return -EINVAL;
516 }
517
518 EXPORT_SYMBOL(acpi_map_lsapic);
519
520 int acpi_unmap_lsapic(int cpu)
521 {
522         /* TBD */
523         return -EINVAL;
524 }
525
526 EXPORT_SYMBOL(acpi_unmap_lsapic);
527 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
528
529 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
530 {
531         /* TBD */
532         return -EINVAL;
533 }
534
535 EXPORT_SYMBOL(acpi_register_ioapic);
536
537 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
538 {
539         /* TBD */
540         return -EINVAL;
541 }
542
543 EXPORT_SYMBOL(acpi_unregister_ioapic);
544
545 static unsigned long __init
546 acpi_scan_rsdp(unsigned long start, unsigned long length)
547 {
548         unsigned long offset = 0;
549         unsigned long sig_len = sizeof("RSD PTR ") - 1;
550
551         /*
552          * Scan all 16-byte boundaries of the physical memory region for the
553          * RSDP signature.
554          */
555         for (offset = 0; offset < length; offset += 16) {
556                 if (strncmp((char *)(start + offset), "RSD PTR ", sig_len))
557                         continue;
558                 return (start + offset);
559         }
560
561         return 0;
562 }
563
564 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
565 {
566         struct acpi_table_sbf *sb;
567
568         if (!phys_addr || !size)
569                 return -EINVAL;
570
571         sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
572         if (!sb) {
573                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
574                 return -ENODEV;
575         }
576
577         sbf_port = sb->sbf_cmos;        /* Save CMOS port */
578
579         return 0;
580 }
581
582 #ifdef CONFIG_HPET_TIMER
583
584 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
585 {
586         struct acpi_table_hpet *hpet_tbl;
587
588         if (!phys || !size)
589                 return -EINVAL;
590
591         hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
592         if (!hpet_tbl) {
593                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
594                 return -ENODEV;
595         }
596
597         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
598                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
599                        "memory.\n");
600                 return -1;
601         }
602 #ifdef  CONFIG_X86_64
603         vxtime.hpet_address = hpet_tbl->addr.addrl |
604             ((long)hpet_tbl->addr.addrh << 32);
605
606         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
607                hpet_tbl->id, vxtime.hpet_address);
608 #else                           /* X86 */
609         {
610                 extern unsigned long hpet_address;
611
612                 hpet_address = hpet_tbl->addr.addrl;
613                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
614                        hpet_tbl->id, hpet_address);
615         }
616 #endif                          /* X86 */
617
618         return 0;
619 }
620 #else
621 #define acpi_parse_hpet NULL
622 #endif
623
624 #ifdef CONFIG_X86_PM_TIMER
625 extern u32 pmtmr_ioport;
626 #endif
627
628 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
629 {
630         struct fadt_descriptor_rev2 *fadt = NULL;
631
632         fadt = (struct fadt_descriptor_rev2 *)__acpi_map_table(phys, size);
633         if (!fadt) {
634                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
635                 return 0;
636         }
637 #ifdef  CONFIG_ACPI_INTERPRETER
638         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
639         acpi_fadt.sci_int = fadt->sci_int;
640 #endif
641
642 #ifdef CONFIG_ACPI_BUS
643         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
644         acpi_fadt.revision = fadt->revision;
645         acpi_fadt.force_apic_physical_destination_mode =
646             fadt->force_apic_physical_destination_mode;
647 #endif
648
649 #ifdef CONFIG_X86_PM_TIMER
650         /* detect the location of the ACPI PM Timer */
651         if (fadt->revision >= FADT2_REVISION_ID) {
652                 /* FADT rev. 2 */
653                 if (fadt->xpm_tmr_blk.address_space_id !=
654                     ACPI_ADR_SPACE_SYSTEM_IO)
655                         return 0;
656
657                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
658         } else {
659                 /* FADT rev. 1 */
660                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
661         }
662         if (pmtmr_ioport)
663                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
664                        pmtmr_ioport);
665 #endif
666         return 0;
667 }
668
669 unsigned long __init acpi_find_rsdp(void)
670 {
671         unsigned long rsdp_phys = 0;
672
673         if (efi_enabled) {
674                 if (efi.acpi20)
675                         return __pa(efi.acpi20);
676                 else if (efi.acpi)
677                         return __pa(efi.acpi);
678         }
679         /*
680          * Scan memory looking for the RSDP signature. First search EBDA (low
681          * memory) paragraphs and then search upper memory (E0000-FFFFF).
682          */
683         rsdp_phys = acpi_scan_rsdp(0, 0x400);
684         if (!rsdp_phys)
685                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
686
687         return rsdp_phys;
688 }
689
690 #ifdef  CONFIG_X86_LOCAL_APIC
691 /*
692  * Parse LAPIC entries in MADT
693  * returns 0 on success, < 0 on error
694  */
695 static int __init acpi_parse_madt_lapic_entries(void)
696 {
697         int count;
698
699         /* 
700          * Note that the LAPIC address is obtained from the MADT (32-bit value)
701          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
702          */
703
704         count =
705             acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
706                                   acpi_parse_lapic_addr_ovr, 0);
707         if (count < 0) {
708                 printk(KERN_ERR PREFIX
709                        "Error parsing LAPIC address override entry\n");
710                 return count;
711         }
712
713         mp_register_lapic_address(acpi_lapic_addr);
714
715         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
716                                       MAX_APICS);
717         if (!count) {
718                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
719                 /* TBD: Cleanup to allow fallback to MPS */
720                 return -ENODEV;
721         } else if (count < 0) {
722                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
723                 /* TBD: Cleanup to allow fallback to MPS */
724                 return count;
725         }
726
727         count =
728             acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
729         if (count < 0) {
730                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
731                 /* TBD: Cleanup to allow fallback to MPS */
732                 return count;
733         }
734         return 0;
735 }
736 #endif                          /* CONFIG_X86_LOCAL_APIC */
737
738 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
739 /*
740  * Parse IOAPIC related entries in MADT
741  * returns 0 on success, < 0 on error
742  */
743 static int __init acpi_parse_madt_ioapic_entries(void)
744 {
745         int count;
746
747         /*
748          * ACPI interpreter is required to complete interrupt setup,
749          * so if it is off, don't enumerate the io-apics with ACPI.
750          * If MPS is present, it will handle them,
751          * otherwise the system will stay in PIC mode
752          */
753         if (acpi_disabled || acpi_noirq) {
754                 return -ENODEV;
755         }
756
757         /*
758          * if "noapic" boot option, don't look for IO-APICs
759          */
760         if (skip_ioapic_setup) {
761                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
762                        "due to 'noapic' option.\n");
763                 return -ENODEV;
764         }
765
766         count =
767             acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
768                                   MAX_IO_APICS);
769         if (!count) {
770                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
771                 return -ENODEV;
772         } else if (count < 0) {
773                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
774                 return count;
775         }
776
777         count =
778             acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
779                                   NR_IRQ_VECTORS);
780         if (count < 0) {
781                 printk(KERN_ERR PREFIX
782                        "Error parsing interrupt source overrides entry\n");
783                 /* TBD: Cleanup to allow fallback to MPS */
784                 return count;
785         }
786
787         /*
788          * If BIOS did not supply an INT_SRC_OVR for the SCI
789          * pretend we got one so we can set the SCI flags.
790          */
791         if (!acpi_sci_override_gsi)
792                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
793
794         /* Fill in identity legacy mapings where no override */
795         mp_config_acpi_legacy_irqs();
796
797         count =
798             acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
799                                   NR_IRQ_VECTORS);
800         if (count < 0) {
801                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
802                 /* TBD: Cleanup to allow fallback to MPS */
803                 return count;
804         }
805
806         return 0;
807 }
808 #else
809 static inline int acpi_parse_madt_ioapic_entries(void)
810 {
811         return -1;
812 }
813 #endif                          /* !(CONFIG_X86_IO_APIC && CONFIG_ACPI_INTERPRETER) */
814
815 static void __init acpi_process_madt(void)
816 {
817 #ifdef CONFIG_X86_LOCAL_APIC
818         int count, error;
819
820         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
821         if (count >= 1) {
822
823                 /*
824                  * Parse MADT LAPIC entries
825                  */
826                 error = acpi_parse_madt_lapic_entries();
827                 if (!error) {
828                         acpi_lapic = 1;
829
830                         /*
831                          * Parse MADT IO-APIC entries
832                          */
833                         error = acpi_parse_madt_ioapic_entries();
834                         if (!error) {
835                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
836                                 acpi_irq_balance_set(NULL);
837                                 acpi_ioapic = 1;
838
839                                 smp_found_config = 1;
840                                 clustered_apic_check();
841                         }
842                 }
843                 if (error == -EINVAL) {
844                         /*
845                          * Dell Precision Workstation 410, 610 come here.
846                          */
847                         printk(KERN_ERR PREFIX
848                                "Invalid BIOS MADT, disabling ACPI\n");
849                         disable_acpi();
850                 }
851         }
852 #endif
853         return;
854 }
855
856 extern int acpi_force;
857
858 #ifdef __i386__
859
860 #ifdef  CONFIG_ACPI_PCI
861 static int __init disable_acpi_irq(struct dmi_system_id *d)
862 {
863         if (!acpi_force) {
864                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
865                        d->ident);
866                 acpi_noirq_set();
867         }
868         return 0;
869 }
870
871 static int __init disable_acpi_pci(struct dmi_system_id *d)
872 {
873         if (!acpi_force) {
874                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
875                        d->ident);
876                 acpi_disable_pci();
877         }
878         return 0;
879 }
880 #endif
881
882 static int __init dmi_disable_acpi(struct dmi_system_id *d)
883 {
884         if (!acpi_force) {
885                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
886                 disable_acpi();
887         } else {
888                 printk(KERN_NOTICE
889                        "Warning: DMI blacklist says broken, but acpi forced\n");
890         }
891         return 0;
892 }
893
894 /*
895  * Limit ACPI to CPU enumeration for HT
896  */
897 static int __init force_acpi_ht(struct dmi_system_id *d)
898 {
899         if (!acpi_force) {
900                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
901                        d->ident);
902                 disable_acpi();
903                 acpi_ht = 1;
904         } else {
905                 printk(KERN_NOTICE
906                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
907         }
908         return 0;
909 }
910
911 /*
912  * If your system is blacklisted here, but you find that acpi=force
913  * works for you, please contact acpi-devel@sourceforge.net
914  */
915 static struct dmi_system_id __initdata acpi_dmi_table[] = {
916         /*
917          * Boxes that need ACPI disabled
918          */
919         {
920          .callback = dmi_disable_acpi,
921          .ident = "IBM Thinkpad",
922          .matches = {
923                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
924                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
925                      },
926          },
927
928         /*
929          * Boxes that need acpi=ht
930          */
931         {
932          .callback = force_acpi_ht,
933          .ident = "FSC Primergy T850",
934          .matches = {
935                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
936                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
937                      },
938          },
939         {
940          .callback = force_acpi_ht,
941          .ident = "DELL GX240",
942          .matches = {
943                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
944                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
945                      },
946          },
947         {
948          .callback = force_acpi_ht,
949          .ident = "HP VISUALIZE NT Workstation",
950          .matches = {
951                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
952                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
953                      },
954          },
955         {
956          .callback = force_acpi_ht,
957          .ident = "Compaq Workstation W8000",
958          .matches = {
959                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
960                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
961                      },
962          },
963         {
964          .callback = force_acpi_ht,
965          .ident = "ASUS P4B266",
966          .matches = {
967                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
968                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
969                      },
970          },
971         {
972          .callback = force_acpi_ht,
973          .ident = "ASUS P2B-DS",
974          .matches = {
975                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
976                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
977                      },
978          },
979         {
980          .callback = force_acpi_ht,
981          .ident = "ASUS CUR-DLS",
982          .matches = {
983                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
984                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
985                      },
986          },
987         {
988          .callback = force_acpi_ht,
989          .ident = "ABIT i440BX-W83977",
990          .matches = {
991                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
992                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
993                      },
994          },
995         {
996          .callback = force_acpi_ht,
997          .ident = "IBM Bladecenter",
998          .matches = {
999                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1000                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1001                      },
1002          },
1003         {
1004          .callback = force_acpi_ht,
1005          .ident = "IBM eServer xSeries 360",
1006          .matches = {
1007                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1008                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1009                      },
1010          },
1011         {
1012          .callback = force_acpi_ht,
1013          .ident = "IBM eserver xSeries 330",
1014          .matches = {
1015                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1016                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1017                      },
1018          },
1019         {
1020          .callback = force_acpi_ht,
1021          .ident = "IBM eserver xSeries 440",
1022          .matches = {
1023                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1024                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1025                      },
1026          },
1027
1028 #ifdef  CONFIG_ACPI_PCI
1029         /*
1030          * Boxes that need ACPI PCI IRQ routing disabled
1031          */
1032         {
1033          .callback = disable_acpi_irq,
1034          .ident = "ASUS A7V",
1035          .matches = {
1036                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1037                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1038                      /* newer BIOS, Revision 1011, does work */
1039                      DMI_MATCH(DMI_BIOS_VERSION,
1040                                "ASUS A7V ACPI BIOS Revision 1007"),
1041                      },
1042          },
1043
1044         /*
1045          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1046          */
1047         {                       /* _BBN 0 bug */
1048          .callback = disable_acpi_pci,
1049          .ident = "ASUS PR-DLS",
1050          .matches = {
1051                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1052                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1053                      DMI_MATCH(DMI_BIOS_VERSION,
1054                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1055                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1056                      },
1057          },
1058         {
1059          .callback = disable_acpi_pci,
1060          .ident = "Acer TravelMate 36x Laptop",
1061          .matches = {
1062                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1063                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1064                      },
1065          },
1066 #endif
1067         {}
1068 };
1069
1070 #endif                          /* __i386__ */
1071
1072 /*
1073  * acpi_boot_table_init() and acpi_boot_init()
1074  *  called from setup_arch(), always.
1075  *      1. checksums all tables
1076  *      2. enumerates lapics
1077  *      3. enumerates io-apics
1078  *
1079  * acpi_table_init() is separate to allow reading SRAT without
1080  * other side effects.
1081  *
1082  * side effects of acpi_boot_init:
1083  *      acpi_lapic = 1 if LAPIC found
1084  *      acpi_ioapic = 1 if IOAPIC found
1085  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1086  *      if acpi_blacklisted() acpi_disabled = 1;
1087  *      acpi_irq_model=...
1088  *      ...
1089  *
1090  * return value: (currently ignored)
1091  *      0: success
1092  *      !0: failure
1093  */
1094
1095 int __init acpi_boot_table_init(void)
1096 {
1097         int error;
1098
1099 #ifdef __i386__
1100         dmi_check_system(acpi_dmi_table);
1101 #endif
1102
1103         /*
1104          * If acpi_disabled, bail out
1105          * One exception: acpi=ht continues far enough to enumerate LAPICs
1106          */
1107         if (acpi_disabled && !acpi_ht)
1108                 return 1;
1109
1110         /* 
1111          * Initialize the ACPI boot-time table parser.
1112          */
1113         error = acpi_table_init();
1114         if (error) {
1115                 disable_acpi();
1116                 return error;
1117         }
1118 #ifdef __i386__
1119         check_acpi_pci();
1120 #endif
1121
1122         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1123
1124         /*
1125          * blacklist may disable ACPI entirely
1126          */
1127         error = acpi_blacklisted();
1128         if (error) {
1129                 if (acpi_force) {
1130                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1131                 } else {
1132                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1133                         disable_acpi();
1134                         return error;
1135                 }
1136         }
1137
1138         return 0;
1139 }
1140
1141 int __init acpi_boot_init(void)
1142 {
1143         /*
1144          * If acpi_disabled, bail out
1145          * One exception: acpi=ht continues far enough to enumerate LAPICs
1146          */
1147         if (acpi_disabled && !acpi_ht)
1148                 return 1;
1149
1150         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1151
1152         /*
1153          * set sci_int and PM timer address
1154          */
1155         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1156
1157         /*
1158          * Process the Multiple APIC Description Table (MADT), if present
1159          */
1160         acpi_process_madt();
1161
1162         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1163
1164         return 0;
1165 }