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Linux/arch/x86/kernel/acpi/boot.c

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  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/acpi.h>
 28 #include <linux/acpi_pmtmr.h>
 29 #include <linux/efi.h>
 30 #include <linux/cpumask.h>
 31 #include <linux/module.h>
 32 #include <linux/dmi.h>
 33 #include <linux/irq.h>
 34 #include <linux/slab.h>
 35 #include <linux/bootmem.h>
 36 #include <linux/ioport.h>
 37 #include <linux/pci.h>
 38 
 39 #include <asm/pci_x86.h>
 40 #include <asm/pgtable.h>
 41 #include <asm/io_apic.h>
 42 #include <asm/apic.h>
 43 #include <asm/io.h>
 44 #include <asm/mpspec.h>
 45 #include <asm/smp.h>
 46 
 47 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
 48 static int __initdata acpi_force = 0;
 49 u32 acpi_rsdt_forced;
 50 int acpi_disabled;
 51 EXPORT_SYMBOL(acpi_disabled);
 52 
 53 #ifdef  CONFIG_X86_64
 54 # include <asm/proto.h>
 55 #endif                          /* X86 */
 56 
 57 #define BAD_MADT_ENTRY(entry, end) (                                        \
 58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
 59                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
 60 
 61 #define PREFIX                  "ACPI: "
 62 
 63 int acpi_noirq;                         /* skip ACPI IRQ initialization */
 64 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
 65 EXPORT_SYMBOL(acpi_pci_disabled);
 66 
 67 int acpi_lapic;
 68 int acpi_ioapic;
 69 int acpi_strict;
 70 
 71 u8 acpi_sci_flags __initdata;
 72 int acpi_sci_override_gsi __initdata;
 73 int acpi_skip_timer_override __initdata;
 74 int acpi_use_timer_override __initdata;
 75 int acpi_fix_pin2_polarity __initdata;
 76 
 77 #ifdef CONFIG_X86_LOCAL_APIC
 78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
 79 #endif
 80 
 81 #ifndef __HAVE_ARCH_CMPXCHG
 82 #warning ACPI uses CMPXCHG, i486 and later hardware
 83 #endif
 84 
 85 /* --------------------------------------------------------------------------
 86                               Boot-time Configuration
 87    -------------------------------------------------------------------------- */
 88 
 89 /*
 90  * The default interrupt routing model is PIC (8259).  This gets
 91  * overridden if IOAPICs are enumerated (below).
 92  */
 93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 94 
 95 
 96 /*
 97  * ISA irqs by default are the first 16 gsis but can be
 98  * any gsi as specified by an interrupt source override.
 99  */
100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
101         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
102 };
103 
104 static unsigned int gsi_to_irq(unsigned int gsi)
105 {
106         unsigned int irq = gsi + NR_IRQS_LEGACY;
107         unsigned int i;
108 
109         for (i = 0; i < NR_IRQS_LEGACY; i++) {
110                 if (isa_irq_to_gsi[i] == gsi) {
111                         return i;
112                 }
113         }
114 
115         /* Provide an identity mapping of gsi == irq
116          * except on truly weird platforms that have
117          * non isa irqs in the first 16 gsis.
118          */
119         if (gsi >= NR_IRQS_LEGACY)
120                 irq = gsi;
121         else
122                 irq = gsi_top + gsi;
123 
124         return irq;
125 }
126 
127 static u32 irq_to_gsi(int irq)
128 {
129         unsigned int gsi;
130 
131         if (irq < NR_IRQS_LEGACY)
132                 gsi = isa_irq_to_gsi[irq];
133         else if (irq < gsi_top)
134                 gsi = irq;
135         else if (irq < (gsi_top + NR_IRQS_LEGACY))
136                 gsi = irq - gsi_top;
137         else
138                 gsi = 0xffffffff;
139 
140         return gsi;
141 }
142 
143 /*
144  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
145  * to map the target physical address. The problem is that set_fixmap()
146  * provides a single page, and it is possible that the page is not
147  * sufficient.
148  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
149  * i.e. until the next __va_range() call.
150  *
151  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
152  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
153  * count idx down while incrementing the phys address.
154  */
155 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
156 {
157 
158         if (!phys || !size)
159                 return NULL;
160 
161         return early_ioremap(phys, size);
162 }
163 void __init __acpi_unmap_table(char *map, unsigned long size)
164 {
165         if (!map || !size)
166                 return;
167 
168         early_iounmap(map, size);
169 }
170 
171 #ifdef CONFIG_X86_LOCAL_APIC
172 static int __init acpi_parse_madt(struct acpi_table_header *table)
173 {
174         struct acpi_table_madt *madt = NULL;
175 
176         if (!cpu_has_apic)
177                 return -EINVAL;
178 
179         madt = (struct acpi_table_madt *)table;
180         if (!madt) {
181                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
182                 return -ENODEV;
183         }
184 
185         if (madt->address) {
186                 acpi_lapic_addr = (u64) madt->address;
187 
188                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
189                        madt->address);
190         }
191 
192         default_acpi_madt_oem_check(madt->header.oem_id,
193                                     madt->header.oem_table_id);
194 
195         return 0;
196 }
197 
198 static void acpi_register_lapic(int id, u8 enabled)
199 {
200         unsigned int ver = 0;
201 
202         if (id >= (MAX_LOCAL_APIC-1)) {
203                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
204                 return;
205         }
206 
207         if (!enabled) {
208                 ++disabled_cpus;
209                 return;
210         }
211 
212         if (boot_cpu_physical_apicid != -1U)
213                 ver = apic_version[boot_cpu_physical_apicid];
214 
215         generic_processor_info(id, ver);
216 }
217 
218 static int __init
219 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
220 {
221         struct acpi_madt_local_x2apic *processor = NULL;
222         int apic_id;
223         u8 enabled;
224 
225         processor = (struct acpi_madt_local_x2apic *)header;
226 
227         if (BAD_MADT_ENTRY(processor, end))
228                 return -EINVAL;
229 
230         acpi_table_print_madt_entry(header);
231 
232         apic_id = processor->local_apic_id;
233         enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
234 #ifdef CONFIG_X86_X2APIC
235         /*
236          * We need to register disabled CPU as well to permit
237          * counting disabled CPUs. This allows us to size
238          * cpus_possible_map more accurately, to permit
239          * to not preallocating memory for all NR_CPUS
240          * when we use CPU hotplug.
241          */
242         if (!apic->apic_id_valid(apic_id) && enabled)
243                 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
244         else
245                 acpi_register_lapic(apic_id, enabled);
246 #else
247         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
248 #endif
249 
250         return 0;
251 }
252 
253 static int __init
254 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
255 {
256         struct acpi_madt_local_apic *processor = NULL;
257 
258         processor = (struct acpi_madt_local_apic *)header;
259 
260         if (BAD_MADT_ENTRY(processor, end))
261                 return -EINVAL;
262 
263         acpi_table_print_madt_entry(header);
264 
265         /*
266          * We need to register disabled CPU as well to permit
267          * counting disabled CPUs. This allows us to size
268          * cpus_possible_map more accurately, to permit
269          * to not preallocating memory for all NR_CPUS
270          * when we use CPU hotplug.
271          */
272         acpi_register_lapic(processor->id,      /* APIC ID */
273                             processor->lapic_flags & ACPI_MADT_ENABLED);
274 
275         return 0;
276 }
277 
278 static int __init
279 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
280 {
281         struct acpi_madt_local_sapic *processor = NULL;
282 
283         processor = (struct acpi_madt_local_sapic *)header;
284 
285         if (BAD_MADT_ENTRY(processor, end))
286                 return -EINVAL;
287 
288         acpi_table_print_madt_entry(header);
289 
290         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
291                             processor->lapic_flags & ACPI_MADT_ENABLED);
292 
293         return 0;
294 }
295 
296 static int __init
297 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
298                           const unsigned long end)
299 {
300         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
301 
302         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
303 
304         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
305                 return -EINVAL;
306 
307         acpi_lapic_addr = lapic_addr_ovr->address;
308 
309         return 0;
310 }
311 
312 static int __init
313 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
314                       const unsigned long end)
315 {
316         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
317 
318         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
319 
320         if (BAD_MADT_ENTRY(x2apic_nmi, end))
321                 return -EINVAL;
322 
323         acpi_table_print_madt_entry(header);
324 
325         if (x2apic_nmi->lint != 1)
326                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
327 
328         return 0;
329 }
330 
331 static int __init
332 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
333 {
334         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
335 
336         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
337 
338         if (BAD_MADT_ENTRY(lapic_nmi, end))
339                 return -EINVAL;
340 
341         acpi_table_print_madt_entry(header);
342 
343         if (lapic_nmi->lint != 1)
344                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
345 
346         return 0;
347 }
348 
349 #endif                          /*CONFIG_X86_LOCAL_APIC */
350 
351 #ifdef CONFIG_X86_IO_APIC
352 
353 static int __init
354 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
355 {
356         struct acpi_madt_io_apic *ioapic = NULL;
357 
358         ioapic = (struct acpi_madt_io_apic *)header;
359 
360         if (BAD_MADT_ENTRY(ioapic, end))
361                 return -EINVAL;
362 
363         acpi_table_print_madt_entry(header);
364 
365         mp_register_ioapic(ioapic->id,
366                            ioapic->address, ioapic->global_irq_base);
367 
368         return 0;
369 }
370 
371 /*
372  * Parse Interrupt Source Override for the ACPI SCI
373  */
374 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
375 {
376         if (trigger == 0)       /* compatible SCI trigger is level */
377                 trigger = 3;
378 
379         if (polarity == 0)      /* compatible SCI polarity is low */
380                 polarity = 3;
381 
382         /* Command-line over-ride via acpi_sci= */
383         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
384                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
385 
386         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
387                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
388 
389         /*
390          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
391          * If GSI is < 16, this will update its flags,
392          * else it will create a new mp_irqs[] entry.
393          */
394         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
395 
396         /*
397          * stash over-ride to indicate we've been here
398          * and for later update of acpi_gbl_FADT
399          */
400         acpi_sci_override_gsi = gsi;
401         return;
402 }
403 
404 static int __init
405 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
406                        const unsigned long end)
407 {
408         struct acpi_madt_interrupt_override *intsrc = NULL;
409 
410         intsrc = (struct acpi_madt_interrupt_override *)header;
411 
412         if (BAD_MADT_ENTRY(intsrc, end))
413                 return -EINVAL;
414 
415         acpi_table_print_madt_entry(header);
416 
417         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
418                 acpi_sci_ioapic_setup(intsrc->source_irq,
419                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
420                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
421                                       intsrc->global_irq);
422                 return 0;
423         }
424 
425         if (intsrc->source_irq == 0) {
426                 if (acpi_skip_timer_override) {
427                         printk(PREFIX "BIOS IRQ0 override ignored.\n");
428                         return 0;
429                 }
430 
431                 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
432                         && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
433                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
434                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
435                 }
436         }
437 
438         mp_override_legacy_irq(intsrc->source_irq,
439                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
440                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
441                                 intsrc->global_irq);
442 
443         return 0;
444 }
445 
446 static int __init
447 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
448 {
449         struct acpi_madt_nmi_source *nmi_src = NULL;
450 
451         nmi_src = (struct acpi_madt_nmi_source *)header;
452 
453         if (BAD_MADT_ENTRY(nmi_src, end))
454                 return -EINVAL;
455 
456         acpi_table_print_madt_entry(header);
457 
458         /* TBD: Support nimsrc entries? */
459 
460         return 0;
461 }
462 
463 #endif                          /* CONFIG_X86_IO_APIC */
464 
465 /*
466  * acpi_pic_sci_set_trigger()
467  *
468  * use ELCR to set PIC-mode trigger type for SCI
469  *
470  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
471  * it may require Edge Trigger -- use "acpi_sci=edge"
472  *
473  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
474  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
475  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
476  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
477  */
478 
479 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
480 {
481         unsigned int mask = 1 << irq;
482         unsigned int old, new;
483 
484         /* Real old ELCR mask */
485         old = inb(0x4d0) | (inb(0x4d1) << 8);
486 
487         /*
488          * If we use ACPI to set PCI IRQs, then we should clear ELCR
489          * since we will set it correctly as we enable the PCI irq
490          * routing.
491          */
492         new = acpi_noirq ? old : 0;
493 
494         /*
495          * Update SCI information in the ELCR, it isn't in the PCI
496          * routing tables..
497          */
498         switch (trigger) {
499         case 1:         /* Edge - clear */
500                 new &= ~mask;
501                 break;
502         case 3:         /* Level - set */
503                 new |= mask;
504                 break;
505         }
506 
507         if (old == new)
508                 return;
509 
510         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
511         outb(new, 0x4d0);
512         outb(new >> 8, 0x4d1);
513 }
514 
515 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
516 {
517         *irq = gsi_to_irq(gsi);
518 
519 #ifdef CONFIG_X86_IO_APIC
520         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
521                 setup_IO_APIC_irq_extra(gsi);
522 #endif
523 
524         return 0;
525 }
526 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
527 
528 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
529 {
530         if (isa_irq >= 16)
531                 return -1;
532         *gsi = irq_to_gsi(isa_irq);
533         return 0;
534 }
535 
536 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
537                                  int trigger, int polarity)
538 {
539 #ifdef CONFIG_PCI
540         /*
541          * Make sure all (legacy) PCI IRQs are set as level-triggered.
542          */
543         if (trigger == ACPI_LEVEL_SENSITIVE)
544                 eisa_set_level_irq(gsi);
545 #endif
546 
547         return gsi;
548 }
549 
550 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
551                                     int trigger, int polarity)
552 {
553 #ifdef CONFIG_X86_IO_APIC
554         gsi = mp_register_gsi(dev, gsi, trigger, polarity);
555 #endif
556 
557         return gsi;
558 }
559 
560 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
561                            int trigger, int polarity) = acpi_register_gsi_pic;
562 
563 #ifdef CONFIG_ACPI_SLEEP
564 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
565 #else
566 int (*acpi_suspend_lowlevel)(void);
567 #endif
568 
569 /*
570  * success: return IRQ number (>=0)
571  * failure: return < 0
572  */
573 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
574 {
575         unsigned int irq;
576         unsigned int plat_gsi = gsi;
577 
578         plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
579         irq = gsi_to_irq(plat_gsi);
580 
581         return irq;
582 }
583 EXPORT_SYMBOL_GPL(acpi_register_gsi);
584 
585 void acpi_unregister_gsi(u32 gsi)
586 {
587 }
588 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
589 
590 void __init acpi_set_irq_model_pic(void)
591 {
592         acpi_irq_model = ACPI_IRQ_MODEL_PIC;
593         __acpi_register_gsi = acpi_register_gsi_pic;
594         acpi_ioapic = 0;
595 }
596 
597 void __init acpi_set_irq_model_ioapic(void)
598 {
599         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
600         __acpi_register_gsi = acpi_register_gsi_ioapic;
601         acpi_ioapic = 1;
602 }
603 
604 /*
605  *  ACPI based hotplug support for CPU
606  */
607 #ifdef CONFIG_ACPI_HOTPLUG_CPU
608 #include <acpi/processor.h>
609 
610 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
611 {
612 #ifdef CONFIG_ACPI_NUMA
613         int nid;
614 
615         nid = acpi_get_node(handle);
616         if (nid == -1 || !node_online(nid))
617                 return;
618         set_apicid_to_node(physid, nid);
619         numa_set_node(cpu, nid);
620 #endif
621 }
622 
623 static int _acpi_map_lsapic(acpi_handle handle, int *pcpu)
624 {
625         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
626         union acpi_object *obj;
627         struct acpi_madt_local_apic *lapic;
628         cpumask_var_t tmp_map, new_map;
629         u8 physid;
630         int cpu;
631         int retval = -ENOMEM;
632 
633         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
634                 return -EINVAL;
635 
636         if (!buffer.length || !buffer.pointer)
637                 return -EINVAL;
638 
639         obj = buffer.pointer;
640         if (obj->type != ACPI_TYPE_BUFFER ||
641             obj->buffer.length < sizeof(*lapic)) {
642                 kfree(buffer.pointer);
643                 return -EINVAL;
644         }
645 
646         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
647 
648         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
649             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
650                 kfree(buffer.pointer);
651                 return -EINVAL;
652         }
653 
654         physid = lapic->id;
655 
656         kfree(buffer.pointer);
657         buffer.length = ACPI_ALLOCATE_BUFFER;
658         buffer.pointer = NULL;
659         lapic = NULL;
660 
661         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
662                 goto out;
663 
664         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
665                 goto free_tmp_map;
666 
667         cpumask_copy(tmp_map, cpu_present_mask);
668         acpi_register_lapic(physid, ACPI_MADT_ENABLED);
669 
670         /*
671          * If acpi_register_lapic successfully generates a new logical cpu
672          * number, then the following will get us exactly what was mapped
673          */
674         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
675         if (cpumask_empty(new_map)) {
676                 printk ("Unable to map lapic to logical cpu number\n");
677                 retval = -EINVAL;
678                 goto free_new_map;
679         }
680 
681         acpi_processor_set_pdc(handle);
682 
683         cpu = cpumask_first(new_map);
684         acpi_map_cpu2node(handle, cpu, physid);
685 
686         *pcpu = cpu;
687         retval = 0;
688 
689 free_new_map:
690         free_cpumask_var(new_map);
691 free_tmp_map:
692         free_cpumask_var(tmp_map);
693 out:
694         return retval;
695 }
696 
697 /* wrapper to silence section mismatch warning */
698 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
699 {
700         return _acpi_map_lsapic(handle, pcpu);
701 }
702 EXPORT_SYMBOL(acpi_map_lsapic);
703 
704 int acpi_unmap_lsapic(int cpu)
705 {
706 #ifdef CONFIG_ACPI_NUMA
707         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
708 #endif
709 
710         per_cpu(x86_cpu_to_apicid, cpu) = -1;
711         set_cpu_present(cpu, false);
712         num_processors--;
713 
714         return (0);
715 }
716 
717 EXPORT_SYMBOL(acpi_unmap_lsapic);
718 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
719 
720 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
721 {
722         /* TBD */
723         return -EINVAL;
724 }
725 
726 EXPORT_SYMBOL(acpi_register_ioapic);
727 
728 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
729 {
730         /* TBD */
731         return -EINVAL;
732 }
733 
734 EXPORT_SYMBOL(acpi_unregister_ioapic);
735 
736 static int __init acpi_parse_sbf(struct acpi_table_header *table)
737 {
738         struct acpi_table_boot *sb;
739 
740         sb = (struct acpi_table_boot *)table;
741         if (!sb) {
742                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
743                 return -ENODEV;
744         }
745 
746         sbf_port = sb->cmos_index;      /* Save CMOS port */
747 
748         return 0;
749 }
750 
751 #ifdef CONFIG_HPET_TIMER
752 #include <asm/hpet.h>
753 
754 static struct __initdata resource *hpet_res;
755 
756 static int __init acpi_parse_hpet(struct acpi_table_header *table)
757 {
758         struct acpi_table_hpet *hpet_tbl;
759 
760         hpet_tbl = (struct acpi_table_hpet *)table;
761         if (!hpet_tbl) {
762                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
763                 return -ENODEV;
764         }
765 
766         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
767                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
768                        "memory.\n");
769                 return -1;
770         }
771 
772         hpet_address = hpet_tbl->address.address;
773         hpet_blockid = hpet_tbl->sequence;
774 
775         /*
776          * Some broken BIOSes advertise HPET at 0x0. We really do not
777          * want to allocate a resource there.
778          */
779         if (!hpet_address) {
780                 printk(KERN_WARNING PREFIX
781                        "HPET id: %#x base: %#lx is invalid\n",
782                        hpet_tbl->id, hpet_address);
783                 return 0;
784         }
785 #ifdef CONFIG_X86_64
786         /*
787          * Some even more broken BIOSes advertise HPET at
788          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
789          * some noise:
790          */
791         if (hpet_address == 0xfed0000000000000UL) {
792                 if (!hpet_force_user) {
793                         printk(KERN_WARNING PREFIX "HPET id: %#x "
794                                "base: 0xfed0000000000000 is bogus\n "
795                                "try hpet=force on the kernel command line to "
796                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
797                         hpet_address = 0;
798                         return 0;
799                 }
800                 printk(KERN_WARNING PREFIX
801                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
802                        "to 0xfed00000.\n", hpet_tbl->id);
803                 hpet_address >>= 32;
804         }
805 #endif
806         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
807                hpet_tbl->id, hpet_address);
808 
809         /*
810          * Allocate and initialize the HPET firmware resource for adding into
811          * the resource tree during the lateinit timeframe.
812          */
813 #define HPET_RESOURCE_NAME_SIZE 9
814         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
815 
816         hpet_res->name = (void *)&hpet_res[1];
817         hpet_res->flags = IORESOURCE_MEM;
818         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
819                  hpet_tbl->sequence);
820 
821         hpet_res->start = hpet_address;
822         hpet_res->end = hpet_address + (1 * 1024) - 1;
823 
824         return 0;
825 }
826 
827 /*
828  * hpet_insert_resource inserts the HPET resources used into the resource
829  * tree.
830  */
831 static __init int hpet_insert_resource(void)
832 {
833         if (!hpet_res)
834                 return 1;
835 
836         return insert_resource(&iomem_resource, hpet_res);
837 }
838 
839 late_initcall(hpet_insert_resource);
840 
841 #else
842 #define acpi_parse_hpet NULL
843 #endif
844 
845 static int __init acpi_parse_fadt(struct acpi_table_header *table)
846 {
847 
848 #ifdef CONFIG_X86_PM_TIMER
849         /* detect the location of the ACPI PM Timer */
850         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
851                 /* FADT rev. 2 */
852                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
853                     ACPI_ADR_SPACE_SYSTEM_IO)
854                         return 0;
855 
856                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
857                 /*
858                  * "X" fields are optional extensions to the original V1.0
859                  * fields, so we must selectively expand V1.0 fields if the
860                  * corresponding X field is zero.
861                  */
862                 if (!pmtmr_ioport)
863                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
864         } else {
865                 /* FADT rev. 1 */
866                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
867         }
868         if (pmtmr_ioport)
869                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
870                        pmtmr_ioport);
871 #endif
872         return 0;
873 }
874 
875 #ifdef  CONFIG_X86_LOCAL_APIC
876 /*
877  * Parse LAPIC entries in MADT
878  * returns 0 on success, < 0 on error
879  */
880 
881 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
882 {
883         int count;
884 
885         if (!cpu_has_apic)
886                 return -ENODEV;
887 
888         /*
889          * Note that the LAPIC address is obtained from the MADT (32-bit value)
890          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
891          */
892 
893         count =
894             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
895                                   acpi_parse_lapic_addr_ovr, 0);
896         if (count < 0) {
897                 printk(KERN_ERR PREFIX
898                        "Error parsing LAPIC address override entry\n");
899                 return count;
900         }
901 
902         register_lapic_address(acpi_lapic_addr);
903 
904         return count;
905 }
906 
907 static int __init acpi_parse_madt_lapic_entries(void)
908 {
909         int count;
910         int x2count = 0;
911 
912         if (!cpu_has_apic)
913                 return -ENODEV;
914 
915         /*
916          * Note that the LAPIC address is obtained from the MADT (32-bit value)
917          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
918          */
919 
920         count =
921             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
922                                   acpi_parse_lapic_addr_ovr, 0);
923         if (count < 0) {
924                 printk(KERN_ERR PREFIX
925                        "Error parsing LAPIC address override entry\n");
926                 return count;
927         }
928 
929         register_lapic_address(acpi_lapic_addr);
930 
931         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
932                                       acpi_parse_sapic, MAX_LOCAL_APIC);
933 
934         if (!count) {
935                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
936                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
937                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
938                                         acpi_parse_lapic, MAX_LOCAL_APIC);
939         }
940         if (!count && !x2count) {
941                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
942                 /* TBD: Cleanup to allow fallback to MPS */
943                 return -ENODEV;
944         } else if (count < 0 || x2count < 0) {
945                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
946                 /* TBD: Cleanup to allow fallback to MPS */
947                 return count;
948         }
949 
950         x2count =
951             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
952                                   acpi_parse_x2apic_nmi, 0);
953         count =
954             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
955         if (count < 0 || x2count < 0) {
956                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
957                 /* TBD: Cleanup to allow fallback to MPS */
958                 return count;
959         }
960         return 0;
961 }
962 #endif                          /* CONFIG_X86_LOCAL_APIC */
963 
964 #ifdef  CONFIG_X86_IO_APIC
965 #define MP_ISA_BUS              0
966 
967 #ifdef CONFIG_X86_ES7000
968 extern int es7000_plat;
969 #endif
970 
971 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
972 {
973         int ioapic;
974         int pin;
975         struct mpc_intsrc mp_irq;
976 
977         /*
978          * Convert 'gsi' to 'ioapic.pin'.
979          */
980         ioapic = mp_find_ioapic(gsi);
981         if (ioapic < 0)
982                 return;
983         pin = mp_find_ioapic_pin(ioapic, gsi);
984 
985         /*
986          * TBD: This check is for faulty timer entries, where the override
987          *      erroneously sets the trigger to level, resulting in a HUGE
988          *      increase of timer interrupts!
989          */
990         if ((bus_irq == 0) && (trigger == 3))
991                 trigger = 1;
992 
993         mp_irq.type = MP_INTSRC;
994         mp_irq.irqtype = mp_INT;
995         mp_irq.irqflag = (trigger << 2) | polarity;
996         mp_irq.srcbus = MP_ISA_BUS;
997         mp_irq.srcbusirq = bus_irq;     /* IRQ */
998         mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
999         mp_irq.dstirq = pin;    /* INTIN# */
1000 
1001         mp_save_irq(&mp_irq);
1002 
1003         isa_irq_to_gsi[bus_irq] = gsi;
1004 }
1005 
1006 void __init mp_config_acpi_legacy_irqs(void)
1007 {
1008         int i;
1009         struct mpc_intsrc mp_irq;
1010 
1011 #ifdef CONFIG_EISA
1012         /*
1013          * Fabricate the legacy ISA bus (bus #31).
1014          */
1015         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1016 #endif
1017         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1018         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1019 
1020 #ifdef CONFIG_X86_ES7000
1021         /*
1022          * Older generations of ES7000 have no legacy identity mappings
1023          */
1024         if (es7000_plat == 1)
1025                 return;
1026 #endif
1027 
1028         /*
1029          * Use the default configuration for the IRQs 0-15.  Unless
1030          * overridden by (MADT) interrupt source override entries.
1031          */
1032         for (i = 0; i < 16; i++) {
1033                 int ioapic, pin;
1034                 unsigned int dstapic;
1035                 int idx;
1036                 u32 gsi;
1037 
1038                 /* Locate the gsi that irq i maps to. */
1039                 if (acpi_isa_irq_to_gsi(i, &gsi))
1040                         continue;
1041 
1042                 /*
1043                  * Locate the IOAPIC that manages the ISA IRQ.
1044                  */
1045                 ioapic = mp_find_ioapic(gsi);
1046                 if (ioapic < 0)
1047                         continue;
1048                 pin = mp_find_ioapic_pin(ioapic, gsi);
1049                 dstapic = mpc_ioapic_id(ioapic);
1050 
1051                 for (idx = 0; idx < mp_irq_entries; idx++) {
1052                         struct mpc_intsrc *irq = mp_irqs + idx;
1053 
1054                         /* Do we already have a mapping for this ISA IRQ? */
1055                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1056                                 break;
1057 
1058                         /* Do we already have a mapping for this IOAPIC pin */
1059                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1060                                 break;
1061                 }
1062 
1063                 if (idx != mp_irq_entries) {
1064                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1065                         continue;       /* IRQ already used */
1066                 }
1067 
1068                 mp_irq.type = MP_INTSRC;
1069                 mp_irq.irqflag = 0;     /* Conforming */
1070                 mp_irq.srcbus = MP_ISA_BUS;
1071                 mp_irq.dstapic = dstapic;
1072                 mp_irq.irqtype = mp_INT;
1073                 mp_irq.srcbusirq = i; /* Identity mapped */
1074                 mp_irq.dstirq = pin;
1075 
1076                 mp_save_irq(&mp_irq);
1077         }
1078 }
1079 
1080 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1081                         int polarity)
1082 {
1083 #ifdef CONFIG_X86_MPPARSE
1084         struct mpc_intsrc mp_irq;
1085         struct pci_dev *pdev;
1086         unsigned char number;
1087         unsigned int devfn;
1088         int ioapic;
1089         u8 pin;
1090 
1091         if (!acpi_ioapic)
1092                 return 0;
1093         if (!dev)
1094                 return 0;
1095         if (dev->bus != &pci_bus_type)
1096                 return 0;
1097 
1098         pdev = to_pci_dev(dev);
1099         number = pdev->bus->number;
1100         devfn = pdev->devfn;
1101         pin = pdev->pin;
1102         /* print the entry should happen on mptable identically */
1103         mp_irq.type = MP_INTSRC;
1104         mp_irq.irqtype = mp_INT;
1105         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1106                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1107         mp_irq.srcbus = number;
1108         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1109         ioapic = mp_find_ioapic(gsi);
1110         mp_irq.dstapic = mpc_ioapic_id(ioapic);
1111         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1112 
1113         mp_save_irq(&mp_irq);
1114 #endif
1115         return 0;
1116 }
1117 
1118 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1119 {
1120         int ioapic;
1121         int ioapic_pin;
1122         struct io_apic_irq_attr irq_attr;
1123 
1124         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1125                 return gsi;
1126 
1127         /* Don't set up the ACPI SCI because it's already set up */
1128         if (acpi_gbl_FADT.sci_interrupt == gsi)
1129                 return gsi;
1130 
1131         ioapic = mp_find_ioapic(gsi);
1132         if (ioapic < 0) {
1133                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1134                 return gsi;
1135         }
1136 
1137         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1138 
1139         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1140                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1141                        "%d-%d\n", mpc_ioapic_id(ioapic),
1142                        ioapic_pin);
1143                 return gsi;
1144         }
1145 
1146         if (enable_update_mptable)
1147                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1148 
1149         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1150                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1151                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1152         io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1153 
1154         return gsi;
1155 }
1156 
1157 /*
1158  * Parse IOAPIC related entries in MADT
1159  * returns 0 on success, < 0 on error
1160  */
1161 static int __init acpi_parse_madt_ioapic_entries(void)
1162 {
1163         int count;
1164 
1165         /*
1166          * ACPI interpreter is required to complete interrupt setup,
1167          * so if it is off, don't enumerate the io-apics with ACPI.
1168          * If MPS is present, it will handle them,
1169          * otherwise the system will stay in PIC mode
1170          */
1171         if (acpi_disabled || acpi_noirq)
1172                 return -ENODEV;
1173 
1174         if (!cpu_has_apic)
1175                 return -ENODEV;
1176 
1177         /*
1178          * if "noapic" boot option, don't look for IO-APICs
1179          */
1180         if (skip_ioapic_setup) {
1181                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1182                        "due to 'noapic' option.\n");
1183                 return -ENODEV;
1184         }
1185 
1186         count =
1187             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1188                                   MAX_IO_APICS);
1189         if (!count) {
1190                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1191                 return -ENODEV;
1192         } else if (count < 0) {
1193                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1194                 return count;
1195         }
1196 
1197         count =
1198             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1199                                   nr_irqs);
1200         if (count < 0) {
1201                 printk(KERN_ERR PREFIX
1202                        "Error parsing interrupt source overrides entry\n");
1203                 /* TBD: Cleanup to allow fallback to MPS */
1204                 return count;
1205         }
1206 
1207         /*
1208          * If BIOS did not supply an INT_SRC_OVR for the SCI
1209          * pretend we got one so we can set the SCI flags.
1210          */
1211         if (!acpi_sci_override_gsi)
1212                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1213                                       acpi_gbl_FADT.sci_interrupt);
1214 
1215         /* Fill in identity legacy mappings where no override */
1216         mp_config_acpi_legacy_irqs();
1217 
1218         count =
1219             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1220                                   nr_irqs);
1221         if (count < 0) {
1222                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1223                 /* TBD: Cleanup to allow fallback to MPS */
1224                 return count;
1225         }
1226 
1227         return 0;
1228 }
1229 #else
1230 static inline int acpi_parse_madt_ioapic_entries(void)
1231 {
1232         return -1;
1233 }
1234 #endif  /* !CONFIG_X86_IO_APIC */
1235 
1236 static void __init early_acpi_process_madt(void)
1237 {
1238 #ifdef CONFIG_X86_LOCAL_APIC
1239         int error;
1240 
1241         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1242 
1243                 /*
1244                  * Parse MADT LAPIC entries
1245                  */
1246                 error = early_acpi_parse_madt_lapic_addr_ovr();
1247                 if (!error) {
1248                         acpi_lapic = 1;
1249                         smp_found_config = 1;
1250                 }
1251                 if (error == -EINVAL) {
1252                         /*
1253                          * Dell Precision Workstation 410, 610 come here.
1254                          */
1255                         printk(KERN_ERR PREFIX
1256                                "Invalid BIOS MADT, disabling ACPI\n");
1257                         disable_acpi();
1258                 }
1259         }
1260 #endif
1261 }
1262 
1263 static void __init acpi_process_madt(void)
1264 {
1265 #ifdef CONFIG_X86_LOCAL_APIC
1266         int error;
1267 
1268         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1269 
1270                 /*
1271                  * Parse MADT LAPIC entries
1272                  */
1273                 error = acpi_parse_madt_lapic_entries();
1274                 if (!error) {
1275                         acpi_lapic = 1;
1276 
1277                         /*
1278                          * Parse MADT IO-APIC entries
1279                          */
1280                         error = acpi_parse_madt_ioapic_entries();
1281                         if (!error) {
1282                                 acpi_set_irq_model_ioapic();
1283 
1284                                 smp_found_config = 1;
1285                         }
1286                 }
1287                 if (error == -EINVAL) {
1288                         /*
1289                          * Dell Precision Workstation 410, 610 come here.
1290                          */
1291                         printk(KERN_ERR PREFIX
1292                                "Invalid BIOS MADT, disabling ACPI\n");
1293                         disable_acpi();
1294                 }
1295         } else {
1296                 /*
1297                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1298                  * In the event an MPS table was found, forget it.
1299                  * Boot with "acpi=off" to use MPS on such a system.
1300                  */
1301                 if (smp_found_config) {
1302                         printk(KERN_WARNING PREFIX
1303                                 "No APIC-table, disabling MPS\n");
1304                         smp_found_config = 0;
1305                 }
1306         }
1307 
1308         /*
1309          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1310          * processors, where MPS only supports physical.
1311          */
1312         if (acpi_lapic && acpi_ioapic)
1313                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1314                        "information\n");
1315         else if (acpi_lapic)
1316                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1317                        "configuration information\n");
1318 #endif
1319         return;
1320 }
1321 
1322 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1323 {
1324         if (!acpi_force) {
1325                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1326                        d->ident);
1327                 acpi_noirq_set();
1328         }
1329         return 0;
1330 }
1331 
1332 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1333 {
1334         if (!acpi_force) {
1335                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1336                        d->ident);
1337                 acpi_disable_pci();
1338         }
1339         return 0;
1340 }
1341 
1342 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1343 {
1344         if (!acpi_force) {
1345                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1346                 disable_acpi();
1347         } else {
1348                 printk(KERN_NOTICE
1349                        "Warning: DMI blacklist says broken, but acpi forced\n");
1350         }
1351         return 0;
1352 }
1353 
1354 /*
1355  * Force ignoring BIOS IRQ0 override
1356  */
1357 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1358 {
1359         if (!acpi_skip_timer_override) {
1360                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1361                         d->ident);
1362                 acpi_skip_timer_override = 1;
1363         }
1364         return 0;
1365 }
1366 
1367 /*
1368  * If your system is blacklisted here, but you find that acpi=force
1369  * works for you, please contact linux-acpi@vger.kernel.org
1370  */
1371 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1372         /*
1373          * Boxes that need ACPI disabled
1374          */
1375         {
1376          .callback = dmi_disable_acpi,
1377          .ident = "IBM Thinkpad",
1378          .matches = {
1379                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1380                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1381                      },
1382          },
1383 
1384         /*
1385          * Boxes that need ACPI PCI IRQ routing disabled
1386          */
1387         {
1388          .callback = disable_acpi_irq,
1389          .ident = "ASUS A7V",
1390          .matches = {
1391                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1392                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1393                      /* newer BIOS, Revision 1011, does work */
1394                      DMI_MATCH(DMI_BIOS_VERSION,
1395                                "ASUS A7V ACPI BIOS Revision 1007"),
1396                      },
1397          },
1398         {
1399                 /*
1400                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1401                  * for LPC bridge, which is needed for the PCI
1402                  * interrupt links to work. DSDT fix is in bug 5966.
1403                  * 2645, 2646 model numbers are shared with 600/600E/600X
1404                  */
1405          .callback = disable_acpi_irq,
1406          .ident = "IBM Thinkpad 600 Series 2645",
1407          .matches = {
1408                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1409                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1410                      },
1411          },
1412         {
1413          .callback = disable_acpi_irq,
1414          .ident = "IBM Thinkpad 600 Series 2646",
1415          .matches = {
1416                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1417                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1418                      },
1419          },
1420         /*
1421          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1422          */
1423         {                       /* _BBN 0 bug */
1424          .callback = disable_acpi_pci,
1425          .ident = "ASUS PR-DLS",
1426          .matches = {
1427                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1428                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1429                      DMI_MATCH(DMI_BIOS_VERSION,
1430                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1431                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1432                      },
1433          },
1434         {
1435          .callback = disable_acpi_pci,
1436          .ident = "Acer TravelMate 36x Laptop",
1437          .matches = {
1438                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1439                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1440                      },
1441          },
1442         {}
1443 };
1444 
1445 /* second table for DMI checks that should run after early-quirks */
1446 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1447         /*
1448          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1449          * which includes some code which overrides all temperature
1450          * trip points to 16C if the INTIN2 input of the I/O APIC
1451          * is enabled.  This input is incorrectly designated the
1452          * ISA IRQ 0 via an interrupt source override even though
1453          * it is wired to the output of the master 8259A and INTIN0
1454          * is not connected at all.  Force ignoring BIOS IRQ0
1455          * override in that cases.
1456          */
1457         {
1458          .callback = dmi_ignore_irq0_timer_override,
1459          .ident = "HP nx6115 laptop",
1460          .matches = {
1461                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1462                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1463                      },
1464          },
1465         {
1466          .callback = dmi_ignore_irq0_timer_override,
1467          .ident = "HP NX6125 laptop",
1468          .matches = {
1469                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1470                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1471                      },
1472          },
1473         {
1474          .callback = dmi_ignore_irq0_timer_override,
1475          .ident = "HP NX6325 laptop",
1476          .matches = {
1477                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1478                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1479                      },
1480          },
1481         {
1482          .callback = dmi_ignore_irq0_timer_override,
1483          .ident = "HP 6715b laptop",
1484          .matches = {
1485                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1486                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1487                      },
1488          },
1489         {
1490          .callback = dmi_ignore_irq0_timer_override,
1491          .ident = "FUJITSU SIEMENS",
1492          .matches = {
1493                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1494                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1495                      },
1496          },
1497         {}
1498 };
1499 
1500 /*
1501  * acpi_boot_table_init() and acpi_boot_init()
1502  *  called from setup_arch(), always.
1503  *      1. checksums all tables
1504  *      2. enumerates lapics
1505  *      3. enumerates io-apics
1506  *
1507  * acpi_table_init() is separate to allow reading SRAT without
1508  * other side effects.
1509  *
1510  * side effects of acpi_boot_init:
1511  *      acpi_lapic = 1 if LAPIC found
1512  *      acpi_ioapic = 1 if IOAPIC found
1513  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1514  *      if acpi_blacklisted() acpi_disabled = 1;
1515  *      acpi_irq_model=...
1516  *      ...
1517  */
1518 
1519 void __init acpi_boot_table_init(void)
1520 {
1521         dmi_check_system(acpi_dmi_table);
1522 
1523         /*
1524          * If acpi_disabled, bail out
1525          */
1526         if (acpi_disabled)
1527                 return; 
1528 
1529         /*
1530          * Initialize the ACPI boot-time table parser.
1531          */
1532         if (acpi_table_init()) {
1533                 disable_acpi();
1534                 return;
1535         }
1536 
1537         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1538 
1539         /*
1540          * blacklist may disable ACPI entirely
1541          */
1542         if (acpi_blacklisted()) {
1543                 if (acpi_force) {
1544                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1545                 } else {
1546                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1547                         disable_acpi();
1548                         return;
1549                 }
1550         }
1551 }
1552 
1553 int __init early_acpi_boot_init(void)
1554 {
1555         /*
1556          * If acpi_disabled, bail out
1557          */
1558         if (acpi_disabled)
1559                 return 1;
1560 
1561         /*
1562          * Process the Multiple APIC Description Table (MADT), if present
1563          */
1564         early_acpi_process_madt();
1565 
1566         return 0;
1567 }
1568 
1569 int __init acpi_boot_init(void)
1570 {
1571         /* those are executed after early-quirks are executed */
1572         dmi_check_system(acpi_dmi_table_late);
1573 
1574         /*
1575          * If acpi_disabled, bail out
1576          */
1577         if (acpi_disabled)
1578                 return 1;
1579 
1580         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1581 
1582         /*
1583          * set sci_int and PM timer address
1584          */
1585         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1586 
1587         /*
1588          * Process the Multiple APIC Description Table (MADT), if present
1589          */
1590         acpi_process_madt();
1591 
1592         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1593 
1594         if (!acpi_noirq)
1595                 x86_init.pci.init = pci_acpi_init;
1596 
1597         return 0;
1598 }
1599 
1600 static int __init parse_acpi(char *arg)
1601 {
1602         if (!arg)
1603                 return -EINVAL;
1604 
1605         /* "acpi=off" disables both ACPI table parsing and interpreter */
1606         if (strcmp(arg, "off") == 0) {
1607                 disable_acpi();
1608         }
1609         /* acpi=force to over-ride black-list */
1610         else if (strcmp(arg, "force") == 0) {
1611                 acpi_force = 1;
1612                 acpi_disabled = 0;
1613         }
1614         /* acpi=strict disables out-of-spec workarounds */
1615         else if (strcmp(arg, "strict") == 0) {
1616                 acpi_strict = 1;
1617         }
1618         /* acpi=rsdt use RSDT instead of XSDT */
1619         else if (strcmp(arg, "rsdt") == 0) {
1620                 acpi_rsdt_forced = 1;
1621         }
1622         /* "acpi=noirq" disables ACPI interrupt routing */
1623         else if (strcmp(arg, "noirq") == 0) {
1624                 acpi_noirq_set();
1625         }
1626         /* "acpi=copy_dsdt" copys DSDT */
1627         else if (strcmp(arg, "copy_dsdt") == 0) {
1628                 acpi_gbl_copy_dsdt_locally = 1;
1629         } else {
1630                 /* Core will printk when we return error. */
1631                 return -EINVAL;
1632         }
1633         return 0;
1634 }
1635 early_param("acpi", parse_acpi);
1636 
1637 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1638 static int __init parse_pci(char *arg)
1639 {
1640         if (arg && strcmp(arg, "noacpi") == 0)
1641                 acpi_disable_pci();
1642         return 0;
1643 }
1644 early_param("pci", parse_pci);
1645 
1646 int __init acpi_mps_check(void)
1647 {
1648 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1649 /* mptable code is not built-in*/
1650         if (acpi_disabled || acpi_noirq) {
1651                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1652                        "Using acpi=off or acpi=noirq or pci=noacpi "
1653                        "may have problem\n");
1654                 return 1;
1655         }
1656 #endif
1657         return 0;
1658 }
1659 
1660 #ifdef CONFIG_X86_IO_APIC
1661 static int __init parse_acpi_skip_timer_override(char *arg)
1662 {
1663         acpi_skip_timer_override = 1;
1664         return 0;
1665 }
1666 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1667 
1668 static int __init parse_acpi_use_timer_override(char *arg)
1669 {
1670         acpi_use_timer_override = 1;
1671         return 0;
1672 }
1673 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1674 #endif /* CONFIG_X86_IO_APIC */
1675 
1676 static int __init setup_acpi_sci(char *s)
1677 {
1678         if (!s)
1679                 return -EINVAL;
1680         if (!strcmp(s, "edge"))
1681                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1682                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1683         else if (!strcmp(s, "level"))
1684                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1685                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1686         else if (!strcmp(s, "high"))
1687                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1688                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1689         else if (!strcmp(s, "low"))
1690                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1691                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1692         else
1693                 return -EINVAL;
1694         return 0;
1695 }
1696 early_param("acpi_sci", setup_acpi_sci);
1697 
1698 int __acpi_acquire_global_lock(unsigned int *lock)
1699 {
1700         unsigned int old, new, val;
1701         do {
1702                 old = *lock;
1703                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1704                 val = cmpxchg(lock, old, new);
1705         } while (unlikely (val != old));
1706         return (new < 3) ? -1 : 0;
1707 }
1708 
1709 int __acpi_release_global_lock(unsigned int *lock)
1710 {
1711         unsigned int old, new, val;
1712         do {
1713                 old = *lock;
1714                 new = old & ~0x3;
1715                 val = cmpxchg(lock, old, new);
1716         } while (unlikely (val != old));
1717         return old & 0x1;
1718 }
1719 
1720 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1721 {
1722         e820_add_region(addr, size, E820_ACPI);
1723         update_e820();
1724 }
1725 

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