arch/x86/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/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/bootmem.h>
  35 #include <linux/ioport.h>
  36 #include <linux/pci.h>
  37
  38 #include <asm/pgtable.h>
  39 #include <asm/io_apic.h>
  40 #include <asm/apic.h>
  41 #include <asm/io.h>
  42 #include <asm/mpspec.h>
  43 #include <asm/smp.h>
  44
  45 static int __initdata acpi_force = 0;
  46 u32 acpi_rsdt_forced;
  47 int acpi_disabled;
  48 EXPORT_SYMBOL(acpi_disabled);
  49
  50 #ifdef  CONFIG_X86_64
  51 # include <asm/proto.h>
  52 #endif                          /* X86 */
  53
  54 #define BAD_MADT_ENTRY(entry, end) (                                        \
  55                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  56                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  57
  58 #define PREFIX                  "ACPI: "
  59
  60 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  61 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  62 EXPORT_SYMBOL(acpi_pci_disabled);
  63 int acpi_ht __initdata = 1;     /* enable HT */
  64
  65 int acpi_lapic;
  66 int acpi_ioapic;
  67 int acpi_strict;
  68
  69 u8 acpi_sci_flags __initdata;
  70 int acpi_sci_override_gsi __initdata;
  71 int acpi_skip_timer_override __initdata;
  72 int acpi_use_timer_override __initdata;
  73
  74 #ifdef CONFIG_X86_LOCAL_APIC
  75 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  76 #endif
  77
  78 #ifndef __HAVE_ARCH_CMPXCHG
  79 #warning ACPI uses CMPXCHG, i486 and later hardware
  80 #endif
  81
  82 /* --------------------------------------------------------------------------
  83                               Boot-time Configuration
  84    -------------------------------------------------------------------------- */
  85
  86 /*
  87  * The default interrupt routing model is PIC (8259).  This gets
  88  * overridden if IOAPICs are enumerated (below).
  89  */
  90 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  91
  92
  93 /*
  94  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
  95  * to map the target physical address. The problem is that set_fixmap()
  96  * provides a single page, and it is possible that the page is not
  97  * sufficient.
  98  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
  99  * i.e. until the next __va_range() call.
 100  *
 101  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 102  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 103  * count idx down while incrementing the phys address.
 104  */
 105 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 106 {
 107
 108         if (!phys || !size)
 109                 return NULL;
 110
 111         return early_ioremap(phys, size);
 112 }
 113 void __init __acpi_unmap_table(char *map, unsigned long size)
 114 {
 115         if (!map || !size)
 116                 return;
 117
 118         early_iounmap(map, size);
 119 }
 120
 121 #ifdef CONFIG_X86_LOCAL_APIC
 122 static int __init acpi_parse_madt(struct acpi_table_header *table)
 123 {
 124         struct acpi_table_madt *madt = NULL;
 125
 126         if (!cpu_has_apic)
 127                 return -EINVAL;
 128
 129         madt = (struct acpi_table_madt *)table;
 130         if (!madt) {
 131                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 132                 return -ENODEV;
 133         }
 134
 135         if (madt->address) {
 136                 acpi_lapic_addr = (u64) madt->address;
 137
 138                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 139                        madt->address);
 140         }
 141
 142         default_acpi_madt_oem_check(madt->header.oem_id,
 143                                     madt->header.oem_table_id);
 144
 145         return 0;
 146 }
 147
 148 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 149 {
 150         unsigned int ver = 0;
 151
 152         if (!enabled) {
 153                 ++disabled_cpus;
 154                 return;
 155         }
 156
 157         if (boot_cpu_physical_apicid != -1U)
 158                 ver = apic_version[boot_cpu_physical_apicid];
 159
 160         generic_processor_info(id, ver);
 161 }
 162
 163 static int __init
 164 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 165 {
 166         struct acpi_madt_local_x2apic *processor = NULL;
 167
 168         processor = (struct acpi_madt_local_x2apic *)header;
 169
 170         if (BAD_MADT_ENTRY(processor, end))
 171                 return -EINVAL;
 172
 173         acpi_table_print_madt_entry(header);
 174
 175 #ifdef CONFIG_X86_X2APIC
 176         /*
 177          * We need to register disabled CPU as well to permit
 178          * counting disabled CPUs. This allows us to size
 179          * cpus_possible_map more accurately, to permit
 180          * to not preallocating memory for all NR_CPUS
 181          * when we use CPU hotplug.
 182          */
 183         acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 184                             processor->lapic_flags & ACPI_MADT_ENABLED);
 185 #else
 186         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 187 #endif
 188
 189         return 0;
 190 }
 191
 192 static int __init
 193 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 194 {
 195         struct acpi_madt_local_apic *processor = NULL;
 196
 197         processor = (struct acpi_madt_local_apic *)header;
 198
 199         if (BAD_MADT_ENTRY(processor, end))
 200                 return -EINVAL;
 201
 202         acpi_table_print_madt_entry(header);
 203
 204         /*
 205          * We need to register disabled CPU as well to permit
 206          * counting disabled CPUs. This allows us to size
 207          * cpus_possible_map more accurately, to permit
 208          * to not preallocating memory for all NR_CPUS
 209          * when we use CPU hotplug.
 210          */
 211         acpi_register_lapic(processor->id,      /* APIC ID */
 212                             processor->lapic_flags & ACPI_MADT_ENABLED);
 213
 214         return 0;
 215 }
 216
 217 static int __init
 218 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 219 {
 220         struct acpi_madt_local_sapic *processor = NULL;
 221
 222         processor = (struct acpi_madt_local_sapic *)header;
 223
 224         if (BAD_MADT_ENTRY(processor, end))
 225                 return -EINVAL;
 226
 227         acpi_table_print_madt_entry(header);
 228
 229         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 230                             processor->lapic_flags & ACPI_MADT_ENABLED);
 231
 232         return 0;
 233 }
 234
 235 static int __init
 236 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 237                           const unsigned long end)
 238 {
 239         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 240
 241         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 242
 243         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 244                 return -EINVAL;
 245
 246         acpi_lapic_addr = lapic_addr_ovr->address;
 247
 248         return 0;
 249 }
 250
 251 static int __init
 252 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 253                       const unsigned long end)
 254 {
 255         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 256
 257         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 258
 259         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 260                 return -EINVAL;
 261
 262         acpi_table_print_madt_entry(header);
 263
 264         if (x2apic_nmi->lint != 1)
 265                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 266
 267         return 0;
 268 }
 269
 270 static int __init
 271 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 272 {
 273         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 274
 275         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 276
 277         if (BAD_MADT_ENTRY(lapic_nmi, end))
 278                 return -EINVAL;
 279
 280         acpi_table_print_madt_entry(header);
 281
 282         if (lapic_nmi->lint != 1)
 283                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 284
 285         return 0;
 286 }
 287
 288 #endif                          /*CONFIG_X86_LOCAL_APIC */
 289
 290 #ifdef CONFIG_X86_IO_APIC
 291
 292 static int __init
 293 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 294 {
 295         struct acpi_madt_io_apic *ioapic = NULL;
 296
 297         ioapic = (struct acpi_madt_io_apic *)header;
 298
 299         if (BAD_MADT_ENTRY(ioapic, end))
 300                 return -EINVAL;
 301
 302         acpi_table_print_madt_entry(header);
 303
 304         mp_register_ioapic(ioapic->id,
 305                            ioapic->address, ioapic->global_irq_base);
 306
 307         return 0;
 308 }
 309
 310 /*
 311  * Parse Interrupt Source Override for the ACPI SCI
 312  */
 313 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 314 {
 315         if (trigger == 0)       /* compatible SCI trigger is level */
 316                 trigger = 3;
 317
 318         if (polarity == 0)      /* compatible SCI polarity is low */
 319                 polarity = 3;
 320
 321         /* Command-line over-ride via acpi_sci= */
 322         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 323                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 324
 325         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 326                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 327
 328         /*
 329          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 330          * If GSI is < 16, this will update its flags,
 331          * else it will create a new mp_irqs[] entry.
 332          */
 333         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 334
 335         /*
 336          * stash over-ride to indicate we've been here
 337          * and for later update of acpi_gbl_FADT
 338          */
 339         acpi_sci_override_gsi = gsi;
 340         return;
 341 }
 342
 343 static int __init
 344 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 345                        const unsigned long end)
 346 {
 347         struct acpi_madt_interrupt_override *intsrc = NULL;
 348
 349         intsrc = (struct acpi_madt_interrupt_override *)header;
 350
 351         if (BAD_MADT_ENTRY(intsrc, end))
 352                 return -EINVAL;
 353
 354         acpi_table_print_madt_entry(header);
 355
 356         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 357                 acpi_sci_ioapic_setup(intsrc->global_irq,
 358                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 359                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
 360                 return 0;
 361         }
 362
 363         if (acpi_skip_timer_override &&
 364             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 365                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 366                 return 0;
 367         }
 368
 369         mp_override_legacy_irq(intsrc->source_irq,
 370                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 371                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 372                                 intsrc->global_irq);
 373
 374         return 0;
 375 }
 376
 377 static int __init
 378 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 379 {
 380         struct acpi_madt_nmi_source *nmi_src = NULL;
 381
 382         nmi_src = (struct acpi_madt_nmi_source *)header;
 383
 384         if (BAD_MADT_ENTRY(nmi_src, end))
 385                 return -EINVAL;
 386
 387         acpi_table_print_madt_entry(header);
 388
 389         /* TBD: Support nimsrc entries? */
 390
 391         return 0;
 392 }
 393
 394 #endif                          /* CONFIG_X86_IO_APIC */
 395
 396 /*
 397  * acpi_pic_sci_set_trigger()
 398  *
 399  * use ELCR to set PIC-mode trigger type for SCI
 400  *
 401  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 402  * it may require Edge Trigger -- use "acpi_sci=edge"
 403  *
 404  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 405  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 406  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 407  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 408  */
 409
 410 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 411 {
 412         unsigned int mask = 1 << irq;
 413         unsigned int old, new;
 414
 415         /* Real old ELCR mask */
 416         old = inb(0x4d0) | (inb(0x4d1) << 8);
 417
 418         /*
 419          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 420          * since we will set it correctly as we enable the PCI irq
 421          * routing.
 422          */
 423         new = acpi_noirq ? old : 0;
 424
 425         /*
 426          * Update SCI information in the ELCR, it isn't in the PCI
 427          * routing tables..
 428          */
 429         switch (trigger) {
 430         case 1:         /* Edge - clear */
 431                 new &= ~mask;
 432                 break;
 433         case 3:         /* Level - set */
 434                 new |= mask;
 435                 break;
 436         }
 437
 438         if (old == new)
 439                 return;
 440
 441         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 442         outb(new, 0x4d0);
 443         outb(new >> 8, 0x4d1);
 444 }
 445
 446 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 447 {
 448         *irq = gsi;
 449
 450 #ifdef CONFIG_X86_IO_APIC
 451         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 452                 setup_IO_APIC_irq_extra(gsi);
 453 #endif
 454
 455         return 0;
 456 }
 457
 458 /*
 459  * success: return IRQ number (>=0)
 460  * failure: return < 0
 461  */
 462 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 463 {
 464         unsigned int irq;
 465         unsigned int plat_gsi = gsi;
 466
 467 #ifdef CONFIG_PCI
 468         /*
 469          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 470          */
 471         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 472                 if (trigger == ACPI_LEVEL_SENSITIVE)
 473                         eisa_set_level_irq(gsi);
 474         }
 475 #endif
 476
 477 #ifdef CONFIG_X86_IO_APIC
 478         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 479                 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 480         }
 481 #endif
 482         irq = plat_gsi;
 483
 484         return irq;
 485 }
 486
 487 /*
 488  *  ACPI based hotplug support for CPU
 489  */
 490 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 491
 492 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 493 {
 494         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 495         union acpi_object *obj;
 496         struct acpi_madt_local_apic *lapic;
 497         cpumask_var_t tmp_map, new_map;
 498         u8 physid;
 499         int cpu;
 500         int retval = -ENOMEM;
 501
 502         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 503                 return -EINVAL;
 504
 505         if (!buffer.length || !buffer.pointer)
 506                 return -EINVAL;
 507
 508         obj = buffer.pointer;
 509         if (obj->type != ACPI_TYPE_BUFFER ||
 510             obj->buffer.length < sizeof(*lapic)) {
 511                 kfree(buffer.pointer);
 512                 return -EINVAL;
 513         }
 514
 515         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 516
 517         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 518             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 519                 kfree(buffer.pointer);
 520                 return -EINVAL;
 521         }
 522
 523         physid = lapic->id;
 524
 525         kfree(buffer.pointer);
 526         buffer.length = ACPI_ALLOCATE_BUFFER;
 527         buffer.pointer = NULL;
 528
 529         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 530                 goto out;
 531
 532         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 533                 goto free_tmp_map;
 534
 535         cpumask_copy(tmp_map, cpu_present_mask);
 536         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 537
 538         /*
 539          * If mp_register_lapic successfully generates a new logical cpu
 540          * number, then the following will get us exactly what was mapped
 541          */
 542         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 543         if (cpumask_empty(new_map)) {
 544                 printk ("Unable to map lapic to logical cpu number\n");
 545                 retval = -EINVAL;
 546                 goto free_new_map;
 547         }
 548
 549         cpu = cpumask_first(new_map);
 550
 551         *pcpu = cpu;
 552         retval = 0;
 553
 554 free_new_map:
 555         free_cpumask_var(new_map);
 556 free_tmp_map:
 557         free_cpumask_var(tmp_map);
 558 out:
 559         return retval;
 560 }
 561
 562 /* wrapper to silence section mismatch warning */
 563 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 564 {
 565         return _acpi_map_lsapic(handle, pcpu);
 566 }
 567 EXPORT_SYMBOL(acpi_map_lsapic);
 568
 569 int acpi_unmap_lsapic(int cpu)
 570 {
 571         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 572         set_cpu_present(cpu, false);
 573         num_processors--;
 574
 575         return (0);
 576 }
 577
 578 EXPORT_SYMBOL(acpi_unmap_lsapic);
 579 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 580
 581 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 582 {
 583         /* TBD */
 584         return -EINVAL;
 585 }
 586
 587 EXPORT_SYMBOL(acpi_register_ioapic);
 588
 589 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 590 {
 591         /* TBD */
 592         return -EINVAL;
 593 }
 594
 595 EXPORT_SYMBOL(acpi_unregister_ioapic);
 596
 597 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 598 {
 599         struct acpi_table_boot *sb;
 600
 601         sb = (struct acpi_table_boot *)table;
 602         if (!sb) {
 603                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 604                 return -ENODEV;
 605         }
 606
 607         sbf_port = sb->cmos_index;      /* Save CMOS port */
 608
 609         return 0;
 610 }
 611
 612 #ifdef CONFIG_HPET_TIMER
 613 #include <asm/hpet.h>
 614
 615 static struct __initdata resource *hpet_res;
 616
 617 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 618 {
 619         struct acpi_table_hpet *hpet_tbl;
 620
 621         hpet_tbl = (struct acpi_table_hpet *)table;
 622         if (!hpet_tbl) {
 623                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 624                 return -ENODEV;
 625         }
 626
 627         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 628                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 629                        "memory.\n");
 630                 return -1;
 631         }
 632
 633         hpet_address = hpet_tbl->address.address;
 634
 635         /*
 636          * Some broken BIOSes advertise HPET at 0x0. We really do not
 637          * want to allocate a resource there.
 638          */
 639         if (!hpet_address) {
 640                 printk(KERN_WARNING PREFIX
 641                        "HPET id: %#x base: %#lx is invalid\n",
 642                        hpet_tbl->id, hpet_address);
 643                 return 0;
 644         }
 645 #ifdef CONFIG_X86_64
 646         /*
 647          * Some even more broken BIOSes advertise HPET at
 648          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 649          * some noise:
 650          */
 651         if (hpet_address == 0xfed0000000000000UL) {
 652                 if (!hpet_force_user) {
 653                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 654                                "base: 0xfed0000000000000 is bogus\n "
 655                                "try hpet=force on the kernel command line to "
 656                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 657                         hpet_address = 0;
 658                         return 0;
 659                 }
 660                 printk(KERN_WARNING PREFIX
 661                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 662                        "to 0xfed00000.\n", hpet_tbl->id);
 663                 hpet_address >>= 32;
 664         }
 665 #endif
 666         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 667                hpet_tbl->id, hpet_address);
 668
 669         /*
 670          * Allocate and initialize the HPET firmware resource for adding into
 671          * the resource tree during the lateinit timeframe.
 672          */
 673 #define HPET_RESOURCE_NAME_SIZE 9
 674         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 675
 676         hpet_res->name = (void *)&hpet_res[1];
 677         hpet_res->flags = IORESOURCE_MEM;
 678         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 679                  hpet_tbl->sequence);
 680
 681         hpet_res->start = hpet_address;
 682         hpet_res->end = hpet_address + (1 * 1024) - 1;
 683
 684         return 0;
 685 }
 686
 687 /*
 688  * hpet_insert_resource inserts the HPET resources used into the resource
 689  * tree.
 690  */
 691 static __init int hpet_insert_resource(void)
 692 {
 693         if (!hpet_res)
 694                 return 1;
 695
 696         return insert_resource(&iomem_resource, hpet_res);
 697 }
 698
 699 late_initcall(hpet_insert_resource);
 700
 701 #else
 702 #define acpi_parse_hpet NULL
 703 #endif
 704
 705 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 706 {
 707
 708 #ifdef CONFIG_X86_PM_TIMER
 709         /* detect the location of the ACPI PM Timer */
 710         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 711                 /* FADT rev. 2 */
 712                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 713                     ACPI_ADR_SPACE_SYSTEM_IO)
 714                         return 0;
 715
 716                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 717                 /*
 718                  * "X" fields are optional extensions to the original V1.0
 719                  * fields, so we must selectively expand V1.0 fields if the
 720                  * corresponding X field is zero.
 721                  */
 722                 if (!pmtmr_ioport)
 723                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 724         } else {
 725                 /* FADT rev. 1 */
 726                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 727         }
 728         if (pmtmr_ioport)
 729                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 730                        pmtmr_ioport);
 731 #endif
 732         return 0;
 733 }
 734
 735 #ifdef  CONFIG_X86_LOCAL_APIC
 736 /*
 737  * Parse LAPIC entries in MADT
 738  * returns 0 on success, < 0 on error
 739  */
 740
 741 static void __init acpi_register_lapic_address(unsigned long address)
 742 {
 743         mp_lapic_addr = address;
 744
 745         set_fixmap_nocache(FIX_APIC_BASE, address);
 746         if (boot_cpu_physical_apicid == -1U) {
 747                 boot_cpu_physical_apicid  = read_apic_id();
 748                 apic_version[boot_cpu_physical_apicid] =
 749                          GET_APIC_VERSION(apic_read(APIC_LVR));
 750         }
 751 }
 752
 753 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 754 {
 755         int count;
 756
 757         if (!cpu_has_apic)
 758                 return -ENODEV;
 759
 760         /*
 761          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 762          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 763          */
 764
 765         count =
 766             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 767                                   acpi_parse_lapic_addr_ovr, 0);
 768         if (count < 0) {
 769                 printk(KERN_ERR PREFIX
 770                        "Error parsing LAPIC address override entry\n");
 771                 return count;
 772         }
 773
 774         acpi_register_lapic_address(acpi_lapic_addr);
 775
 776         return count;
 777 }
 778
 779 static int __init acpi_parse_madt_lapic_entries(void)
 780 {
 781         int count;
 782         int x2count = 0;
 783
 784         if (!cpu_has_apic)
 785                 return -ENODEV;
 786
 787         /*
 788          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 789          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 790          */
 791
 792         count =
 793             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 794                                   acpi_parse_lapic_addr_ovr, 0);
 795         if (count < 0) {
 796                 printk(KERN_ERR PREFIX
 797                        "Error parsing LAPIC address override entry\n");
 798                 return count;
 799         }
 800
 801         acpi_register_lapic_address(acpi_lapic_addr);
 802
 803         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 804                                       acpi_parse_sapic, MAX_APICS);
 805
 806         if (!count) {
 807                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 808                                                 acpi_parse_x2apic, MAX_APICS);
 809                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 810                                               acpi_parse_lapic, MAX_APICS);
 811         }
 812         if (!count && !x2count) {
 813                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 814                 /* TBD: Cleanup to allow fallback to MPS */
 815                 return -ENODEV;
 816         } else if (count < 0 || x2count < 0) {
 817                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 818                 /* TBD: Cleanup to allow fallback to MPS */
 819                 return count;
 820         }
 821
 822         x2count =
 823             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 824                                   acpi_parse_x2apic_nmi, 0);
 825         count =
 826             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 827         if (count < 0 || x2count < 0) {
 828                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 829                 /* TBD: Cleanup to allow fallback to MPS */
 830                 return count;
 831         }
 832         return 0;
 833 }
 834 #endif                          /* CONFIG_X86_LOCAL_APIC */
 835
 836 #ifdef  CONFIG_X86_IO_APIC
 837 #define MP_ISA_BUS              0
 838
 839 #ifdef CONFIG_X86_ES7000
 840 extern int es7000_plat;
 841 #endif
 842
 843 int __init acpi_probe_gsi(void)
 844 {
 845         int idx;
 846         int gsi;
 847         int max_gsi = 0;
 848
 849         if (acpi_disabled)
 850                 return 0;
 851
 852         if (!acpi_ioapic)
 853                 return 0;
 854
 855         max_gsi = 0;
 856         for (idx = 0; idx < nr_ioapics; idx++) {
 857                 gsi = mp_gsi_routing[idx].gsi_end;
 858
 859                 if (gsi > max_gsi)
 860                         max_gsi = gsi;
 861         }
 862
 863         return max_gsi + 1;
 864 }
 865
 866 static void assign_to_mp_irq(struct mpc_intsrc *m,
 867                                     struct mpc_intsrc *mp_irq)
 868 {
 869         memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
 870 }
 871
 872 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
 873                                 struct mpc_intsrc *m)
 874 {
 875         return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
 876 }
 877
 878 static void save_mp_irq(struct mpc_intsrc *m)
 879 {
 880         int i;
 881
 882         for (i = 0; i < mp_irq_entries; i++) {
 883                 if (!mp_irq_cmp(&mp_irqs[i], m))
 884                         return;
 885         }
 886
 887         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
 888         if (++mp_irq_entries == MAX_IRQ_SOURCES)
 889                 panic("Max # of irq sources exceeded!!\n");
 890 }
 891
 892 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 893 {
 894         int ioapic;
 895         int pin;
 896         struct mpc_intsrc mp_irq;
 897
 898         /*
 899          * Convert 'gsi' to 'ioapic.pin'.
 900          */
 901         ioapic = mp_find_ioapic(gsi);
 902         if (ioapic < 0)
 903                 return;
 904         pin = mp_find_ioapic_pin(ioapic, gsi);
 905
 906         /*
 907          * TBD: This check is for faulty timer entries, where the override
 908          *      erroneously sets the trigger to level, resulting in a HUGE
 909          *      increase of timer interrupts!
 910          */
 911         if ((bus_irq == 0) && (trigger == 3))
 912                 trigger = 1;
 913
 914         mp_irq.type = MP_INTSRC;
 915         mp_irq.irqtype = mp_INT;
 916         mp_irq.irqflag = (trigger << 2) | polarity;
 917         mp_irq.srcbus = MP_ISA_BUS;
 918         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 919         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
 920         mp_irq.dstirq = pin;    /* INTIN# */
 921
 922         save_mp_irq(&mp_irq);
 923 }
 924
 925 void __init mp_config_acpi_legacy_irqs(void)
 926 {
 927         int i;
 928         int ioapic;
 929         unsigned int dstapic;
 930         struct mpc_intsrc mp_irq;
 931
 932 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
 933         /*
 934          * Fabricate the legacy ISA bus (bus #31).
 935          */
 936         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 937 #endif
 938         set_bit(MP_ISA_BUS, mp_bus_not_pci);
 939         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
 940
 941 #ifdef CONFIG_X86_ES7000
 942         /*
 943          * Older generations of ES7000 have no legacy identity mappings
 944          */
 945         if (es7000_plat == 1)
 946                 return;
 947 #endif
 948
 949         /*
 950          * Locate the IOAPIC that manages the ISA IRQs (0-15).
 951          */
 952         ioapic = mp_find_ioapic(0);
 953         if (ioapic < 0)
 954                 return;
 955         dstapic = mp_ioapics[ioapic].apicid;
 956
 957         /*
 958          * Use the default configuration for the IRQs 0-15.  Unless
 959          * overridden by (MADT) interrupt source override entries.
 960          */
 961         for (i = 0; i < 16; i++) {
 962                 int idx;
 963
 964                 for (idx = 0; idx < mp_irq_entries; idx++) {
 965                         struct mpc_intsrc *irq = mp_irqs + idx;
 966
 967                         /* Do we already have a mapping for this ISA IRQ? */
 968                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
 969                                 break;
 970
 971                         /* Do we already have a mapping for this IOAPIC pin */
 972                         if (irq->dstapic == dstapic && irq->dstirq == i)
 973                                 break;
 974                 }
 975
 976                 if (idx != mp_irq_entries) {
 977                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
 978                         continue;       /* IRQ already used */
 979                 }
 980
 981                 mp_irq.type = MP_INTSRC;
 982                 mp_irq.irqflag = 0;     /* Conforming */
 983                 mp_irq.srcbus = MP_ISA_BUS;
 984                 mp_irq.dstapic = dstapic;
 985                 mp_irq.irqtype = mp_INT;
 986                 mp_irq.srcbusirq = i; /* Identity mapped */
 987                 mp_irq.dstirq = i;
 988
 989                 save_mp_irq(&mp_irq);
 990         }
 991 }
 992
 993 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 994                         int polarity)
 995 {
 996 #ifdef CONFIG_X86_MPPARSE
 997         struct mpc_intsrc mp_irq;
 998         struct pci_dev *pdev;
 999         unsigned char number;
1000         unsigned int devfn;
1001         int ioapic;
1002         u8 pin;
1003
1004         if (!acpi_ioapic)
1005                 return 0;
1006         if (!dev)
1007                 return 0;
1008         if (dev->bus != &pci_bus_type)
1009                 return 0;
1010
1011         pdev = to_pci_dev(dev);
1012         number = pdev->bus->number;
1013         devfn = pdev->devfn;
1014         pin = pdev->pin;
1015         /* print the entry should happen on mptable identically */
1016         mp_irq.type = MP_INTSRC;
1017         mp_irq.irqtype = mp_INT;
1018         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1019                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1020         mp_irq.srcbus = number;
1021         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1022         ioapic = mp_find_ioapic(gsi);
1023         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1024         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1025
1026         save_mp_irq(&mp_irq);
1027 #endif
1028         return 0;
1029 }
1030
1031 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1032 {
1033         int ioapic;
1034         int ioapic_pin;
1035         struct io_apic_irq_attr irq_attr;
1036
1037         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1038                 return gsi;
1039
1040         /* Don't set up the ACPI SCI because it's already set up */
1041         if (acpi_gbl_FADT.sci_interrupt == gsi)
1042                 return gsi;
1043
1044         ioapic = mp_find_ioapic(gsi);
1045         if (ioapic < 0) {
1046                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1047                 return gsi;
1048         }
1049
1050         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1051
1052 #ifdef CONFIG_X86_32
1053         if (ioapic_renumber_irq)
1054                 gsi = ioapic_renumber_irq(ioapic, gsi);
1055 #endif
1056
1057         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1058                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1059                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1060                        ioapic_pin);
1061                 return gsi;
1062         }
1063
1064         if (enable_update_mptable)
1065                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1066
1067         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1068                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1069                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1070         io_apic_set_pci_routing(dev, gsi, &irq_attr);
1071
1072         return gsi;
1073 }
1074
1075 /*
1076  * Parse IOAPIC related entries in MADT
1077  * returns 0 on success, < 0 on error
1078  */
1079 static int __init acpi_parse_madt_ioapic_entries(void)
1080 {
1081         int count;
1082
1083         /*
1084          * ACPI interpreter is required to complete interrupt setup,
1085          * so if it is off, don't enumerate the io-apics with ACPI.
1086          * If MPS is present, it will handle them,
1087          * otherwise the system will stay in PIC mode
1088          */
1089         if (acpi_disabled || acpi_noirq)
1090                 return -ENODEV;
1091
1092         if (!cpu_has_apic)
1093                 return -ENODEV;
1094
1095         /*
1096          * if "noapic" boot option, don't look for IO-APICs
1097          */
1098         if (skip_ioapic_setup) {
1099                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1100                        "due to 'noapic' option.\n");
1101                 return -ENODEV;
1102         }
1103
1104         count =
1105             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1106                                   MAX_IO_APICS);
1107         if (!count) {
1108                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1109                 return -ENODEV;
1110         } else if (count < 0) {
1111                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1112                 return count;
1113         }
1114
1115         count =
1116             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1117                                   nr_irqs);
1118         if (count < 0) {
1119                 printk(KERN_ERR PREFIX
1120                        "Error parsing interrupt source overrides entry\n");
1121                 /* TBD: Cleanup to allow fallback to MPS */
1122                 return count;
1123         }
1124
1125         /*
1126          * If BIOS did not supply an INT_SRC_OVR for the SCI
1127          * pretend we got one so we can set the SCI flags.
1128          */
1129         if (!acpi_sci_override_gsi)
1130                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1131
1132         /* Fill in identity legacy mapings where no override */
1133         mp_config_acpi_legacy_irqs();
1134
1135         count =
1136             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1137                                   nr_irqs);
1138         if (count < 0) {
1139                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1140                 /* TBD: Cleanup to allow fallback to MPS */
1141                 return count;
1142         }
1143
1144         return 0;
1145 }
1146 #else
1147 static inline int acpi_parse_madt_ioapic_entries(void)
1148 {
1149         return -1;
1150 }
1151 #endif  /* !CONFIG_X86_IO_APIC */
1152
1153 static void __init early_acpi_process_madt(void)
1154 {
1155 #ifdef CONFIG_X86_LOCAL_APIC
1156         int error;
1157
1158         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1159
1160                 /*
1161                  * Parse MADT LAPIC entries
1162                  */
1163                 error = early_acpi_parse_madt_lapic_addr_ovr();
1164                 if (!error) {
1165                         acpi_lapic = 1;
1166                         smp_found_config = 1;
1167                 }
1168                 if (error == -EINVAL) {
1169                         /*
1170                          * Dell Precision Workstation 410, 610 come here.
1171                          */
1172                         printk(KERN_ERR PREFIX
1173                                "Invalid BIOS MADT, disabling ACPI\n");
1174                         disable_acpi();
1175                 }
1176         }
1177 #endif
1178 }
1179
1180 static void __init acpi_process_madt(void)
1181 {
1182 #ifdef CONFIG_X86_LOCAL_APIC
1183         int error;
1184
1185         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1186
1187                 /*
1188                  * Parse MADT LAPIC entries
1189                  */
1190                 error = acpi_parse_madt_lapic_entries();
1191                 if (!error) {
1192                         acpi_lapic = 1;
1193
1194                         /*
1195                          * Parse MADT IO-APIC entries
1196                          */
1197                         error = acpi_parse_madt_ioapic_entries();
1198                         if (!error) {
1199                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1200                                 acpi_ioapic = 1;
1201
1202                                 smp_found_config = 1;
1203                         }
1204                 }
1205                 if (error == -EINVAL) {
1206                         /*
1207                          * Dell Precision Workstation 410, 610 come here.
1208                          */
1209                         printk(KERN_ERR PREFIX
1210                                "Invalid BIOS MADT, disabling ACPI\n");
1211                         disable_acpi();
1212                 }
1213         } else {
1214                 /*
1215                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1216                  * In the event an MPS table was found, forget it.
1217                  * Boot with "acpi=off" to use MPS on such a system.
1218                  */
1219                 if (smp_found_config) {
1220                         printk(KERN_WARNING PREFIX
1221                                 "No APIC-table, disabling MPS\n");
1222                         smp_found_config = 0;
1223                 }
1224         }
1225
1226         /*
1227          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1228          * processors, where MPS only supports physical.
1229          */
1230         if (acpi_lapic && acpi_ioapic)
1231                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1232                        "information\n");
1233         else if (acpi_lapic)
1234                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1235                        "configuration information\n");
1236 #endif
1237         return;
1238 }
1239
1240 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1241 {
1242         if (!acpi_force) {
1243                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1244                        d->ident);
1245                 acpi_noirq_set();
1246         }
1247         return 0;
1248 }
1249
1250 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1251 {
1252         if (!acpi_force) {
1253                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1254                        d->ident);
1255                 acpi_disable_pci();
1256         }
1257         return 0;
1258 }
1259
1260 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1261 {
1262         if (!acpi_force) {
1263                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1264                 disable_acpi();
1265         } else {
1266                 printk(KERN_NOTICE
1267                        "Warning: DMI blacklist says broken, but acpi forced\n");
1268         }
1269         return 0;
1270 }
1271
1272 /*
1273  * Limit ACPI to CPU enumeration for HT
1274  */
1275 static int __init force_acpi_ht(const struct dmi_system_id *d)
1276 {
1277         if (!acpi_force) {
1278                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1279                        d->ident);
1280                 disable_acpi();
1281                 acpi_ht = 1;
1282         } else {
1283                 printk(KERN_NOTICE
1284                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1285         }
1286         return 0;
1287 }
1288
1289 /*
1290  * Force ignoring BIOS IRQ0 pin2 override
1291  */
1292 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1293 {
1294         /*
1295          * The ati_ixp4x0_rev() early PCI quirk should have set
1296          * the acpi_skip_timer_override flag already:
1297          */
1298         if (!acpi_skip_timer_override) {
1299                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1300                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1301                         d->ident);
1302                 acpi_skip_timer_override = 1;
1303         }
1304         return 0;
1305 }
1306
1307 /*
1308  * If your system is blacklisted here, but you find that acpi=force
1309  * works for you, please contact linux-acpi@vger.kernel.org
1310  */
1311 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1312         /*
1313          * Boxes that need ACPI disabled
1314          */
1315         {
1316          .callback = dmi_disable_acpi,
1317          .ident = "IBM Thinkpad",
1318          .matches = {
1319                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1320                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1321                      },
1322          },
1323
1324         /*
1325          * Boxes that need acpi=ht
1326          */
1327         {
1328          .callback = force_acpi_ht,
1329          .ident = "FSC Primergy T850",
1330          .matches = {
1331                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1332                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1333                      },
1334          },
1335         {
1336          .callback = force_acpi_ht,
1337          .ident = "HP VISUALIZE NT Workstation",
1338          .matches = {
1339                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1340                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1341                      },
1342          },
1343         {
1344          .callback = force_acpi_ht,
1345          .ident = "Compaq Workstation W8000",
1346          .matches = {
1347                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1348                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1349                      },
1350          },
1351         {
1352          .callback = force_acpi_ht,
1353          .ident = "ASUS CUR-DLS",
1354          .matches = {
1355                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1356                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1357                      },
1358          },
1359         {
1360          .callback = force_acpi_ht,
1361          .ident = "ABIT i440BX-W83977",
1362          .matches = {
1363                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1364                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1365                      },
1366          },
1367         {
1368          .callback = force_acpi_ht,
1369          .ident = "IBM Bladecenter",
1370          .matches = {
1371                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1372                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1373                      },
1374          },
1375         {
1376          .callback = force_acpi_ht,
1377          .ident = "IBM eServer xSeries 360",
1378          .matches = {
1379                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1380                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1381                      },
1382          },
1383         {
1384          .callback = force_acpi_ht,
1385          .ident = "IBM eserver xSeries 330",
1386          .matches = {
1387                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1388                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1389                      },
1390          },
1391         {
1392          .callback = force_acpi_ht,
1393          .ident = "IBM eserver xSeries 440",
1394          .matches = {
1395                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1396                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1397                      },
1398          },
1399
1400         /*
1401          * Boxes that need ACPI PCI IRQ routing disabled
1402          */
1403         {
1404          .callback = disable_acpi_irq,
1405          .ident = "ASUS A7V",
1406          .matches = {
1407                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1408                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1409                      /* newer BIOS, Revision 1011, does work */
1410                      DMI_MATCH(DMI_BIOS_VERSION,
1411                                "ASUS A7V ACPI BIOS Revision 1007"),
1412                      },
1413          },
1414         {
1415                 /*
1416                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1417                  * for LPC bridge, which is needed for the PCI
1418                  * interrupt links to work. DSDT fix is in bug 5966.
1419                  * 2645, 2646 model numbers are shared with 600/600E/600X
1420                  */
1421          .callback = disable_acpi_irq,
1422          .ident = "IBM Thinkpad 600 Series 2645",
1423          .matches = {
1424                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1425                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1426                      },
1427          },
1428         {
1429          .callback = disable_acpi_irq,
1430          .ident = "IBM Thinkpad 600 Series 2646",
1431          .matches = {
1432                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1433                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1434                      },
1435          },
1436         /*
1437          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1438          */
1439         {                       /* _BBN 0 bug */
1440          .callback = disable_acpi_pci,
1441          .ident = "ASUS PR-DLS",
1442          .matches = {
1443                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1444                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1445                      DMI_MATCH(DMI_BIOS_VERSION,
1446                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1447                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1448                      },
1449          },
1450         {
1451          .callback = disable_acpi_pci,
1452          .ident = "Acer TravelMate 36x Laptop",
1453          .matches = {
1454                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1455                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1456                      },
1457          },
1458         {}
1459 };
1460
1461 /* second table for DMI checks that should run after early-quirks */
1462 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1463         /*
1464          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1465          * which includes some code which overrides all temperature
1466          * trip points to 16C if the INTIN2 input of the I/O APIC
1467          * is enabled.  This input is incorrectly designated the
1468          * ISA IRQ 0 via an interrupt source override even though
1469          * it is wired to the output of the master 8259A and INTIN0
1470          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1471          * override in that cases.
1472          */
1473         {
1474          .callback = dmi_ignore_irq0_timer_override,
1475          .ident = "HP nx6115 laptop",
1476          .matches = {
1477                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1478                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1479                      },
1480          },
1481         {
1482          .callback = dmi_ignore_irq0_timer_override,
1483          .ident = "HP NX6125 laptop",
1484          .matches = {
1485                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1486                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1487                      },
1488          },
1489         {
1490          .callback = dmi_ignore_irq0_timer_override,
1491          .ident = "HP NX6325 laptop",
1492          .matches = {
1493                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1494                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1495                      },
1496          },
1497         {
1498          .callback = dmi_ignore_irq0_timer_override,
1499          .ident = "HP 6715b laptop",
1500          .matches = {
1501                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1502                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1503                      },
1504          },
1505         {}
1506 };
1507
1508 /*
1509  * acpi_boot_table_init() and acpi_boot_init()
1510  *  called from setup_arch(), always.
1511  *      1. checksums all tables
1512  *      2. enumerates lapics
1513  *      3. enumerates io-apics
1514  *
1515  * acpi_table_init() is separate to allow reading SRAT without
1516  * other side effects.
1517  *
1518  * side effects of acpi_boot_init:
1519  *      acpi_lapic = 1 if LAPIC found
1520  *      acpi_ioapic = 1 if IOAPIC found
1521  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1522  *      if acpi_blacklisted() acpi_disabled = 1;
1523  *      acpi_irq_model=...
1524  *      ...
1525  *
1526  * return value: (currently ignored)
1527  *      0: success
1528  *      !0: failure
1529  */
1530
1531 int __init acpi_boot_table_init(void)
1532 {
1533         int error;
1534
1535         dmi_check_system(acpi_dmi_table);
1536
1537         /*
1538          * If acpi_disabled, bail out
1539          * One exception: acpi=ht continues far enough to enumerate LAPICs
1540          */
1541         if (acpi_disabled && !acpi_ht)
1542                 return 1;
1543
1544         /*
1545          * Initialize the ACPI boot-time table parser.
1546          */
1547         error = acpi_table_init();
1548         if (error) {
1549                 disable_acpi();
1550                 return error;
1551         }
1552
1553         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1554
1555         /*
1556          * blacklist may disable ACPI entirely
1557          */
1558         error = acpi_blacklisted();
1559         if (error) {
1560                 if (acpi_force) {
1561                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1562                 } else {
1563                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1564                         disable_acpi();
1565                         return error;
1566                 }
1567         }
1568
1569         return 0;
1570 }
1571
1572 int __init early_acpi_boot_init(void)
1573 {
1574         /*
1575          * If acpi_disabled, bail out
1576          * One exception: acpi=ht continues far enough to enumerate LAPICs
1577          */
1578         if (acpi_disabled && !acpi_ht)
1579                 return 1;
1580
1581         /*
1582          * Process the Multiple APIC Description Table (MADT), if present
1583          */
1584         early_acpi_process_madt();
1585
1586         return 0;
1587 }
1588
1589 int __init acpi_boot_init(void)
1590 {
1591         /* those are executed after early-quirks are executed */
1592         dmi_check_system(acpi_dmi_table_late);
1593
1594         /*
1595          * If acpi_disabled, bail out
1596          * One exception: acpi=ht continues far enough to enumerate LAPICs
1597          */
1598         if (acpi_disabled && !acpi_ht)
1599                 return 1;
1600
1601         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1602
1603         /*
1604          * set sci_int and PM timer address
1605          */
1606         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1607
1608         /*
1609          * Process the Multiple APIC Description Table (MADT), if present
1610          */
1611         acpi_process_madt();
1612
1613         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1614
1615         return 0;
1616 }
1617
1618 static int __init parse_acpi(char *arg)
1619 {
1620         if (!arg)
1621                 return -EINVAL;
1622
1623         /* "acpi=off" disables both ACPI table parsing and interpreter */
1624         if (strcmp(arg, "off") == 0) {
1625                 disable_acpi();
1626         }
1627         /* acpi=force to over-ride black-list */
1628         else if (strcmp(arg, "force") == 0) {
1629                 acpi_force = 1;
1630                 acpi_ht = 1;
1631                 acpi_disabled = 0;
1632         }
1633         /* acpi=strict disables out-of-spec workarounds */
1634         else if (strcmp(arg, "strict") == 0) {
1635                 acpi_strict = 1;
1636         }
1637         /* Limit ACPI just to boot-time to enable HT */
1638         else if (strcmp(arg, "ht") == 0) {
1639                 if (!acpi_force)
1640                         disable_acpi();
1641                 acpi_ht = 1;
1642         }
1643         /* acpi=rsdt use RSDT instead of XSDT */
1644         else if (strcmp(arg, "rsdt") == 0) {
1645                 acpi_rsdt_forced = 1;
1646         }
1647         /* "acpi=noirq" disables ACPI interrupt routing */
1648         else if (strcmp(arg, "noirq") == 0) {
1649                 acpi_noirq_set();
1650         } else {
1651                 /* Core will printk when we return error. */
1652                 return -EINVAL;
1653         }
1654         return 0;
1655 }
1656 early_param("acpi", parse_acpi);
1657
1658 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1659 static int __init parse_pci(char *arg)
1660 {
1661         if (arg && strcmp(arg, "noacpi") == 0)
1662                 acpi_disable_pci();
1663         return 0;
1664 }
1665 early_param("pci", parse_pci);
1666
1667 int __init acpi_mps_check(void)
1668 {
1669 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1670 /* mptable code is not built-in*/
1671         if (acpi_disabled || acpi_noirq) {
1672                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1673                        "Using acpi=off or acpi=noirq or pci=noacpi "
1674                        "may have problem\n");
1675                 return 1;
1676         }
1677 #endif
1678         return 0;
1679 }
1680
1681 #ifdef CONFIG_X86_IO_APIC
1682 static int __init parse_acpi_skip_timer_override(char *arg)
1683 {
1684         acpi_skip_timer_override = 1;
1685         return 0;
1686 }
1687 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1688
1689 static int __init parse_acpi_use_timer_override(char *arg)
1690 {
1691         acpi_use_timer_override = 1;
1692         return 0;
1693 }
1694 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1695 #endif /* CONFIG_X86_IO_APIC */
1696
1697 static int __init setup_acpi_sci(char *s)
1698 {
1699         if (!s)
1700                 return -EINVAL;
1701         if (!strcmp(s, "edge"))
1702                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1703                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1704         else if (!strcmp(s, "level"))
1705                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1706                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1707         else if (!strcmp(s, "high"))
1708                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1709                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1710         else if (!strcmp(s, "low"))
1711                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1712                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1713         else
1714                 return -EINVAL;
1715         return 0;
1716 }
1717 early_param("acpi_sci", setup_acpi_sci);
1718
1719 int __acpi_acquire_global_lock(unsigned int *lock)
1720 {
1721         unsigned int old, new, val;
1722         do {
1723                 old = *lock;
1724                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1725                 val = cmpxchg(lock, old, new);
1726         } while (unlikely (val != old));
1727         return (new < 3) ? -1 : 0;
1728 }
1729
1730 int __acpi_release_global_lock(unsigned int *lock)
1731 {
1732         unsigned int old, new, val;
1733         do {
1734                 old = *lock;
1735                 new = old & ~0x3;
1736                 val = cmpxchg(lock, old, new);
1737         } while (unlikely (val != old));
1738         return old & 0x1;
1739 }