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
  37 #include <asm/pgtable.h>
  38 #include <asm/io_apic.h>
  39 #include <asm/apic.h>
  40 #include <asm/genapic.h>
  41 #include <asm/io.h>
  42 #include <asm/mpspec.h>
  43 #include <asm/smp.h>
  44
  45 #ifdef CONFIG_X86_LOCAL_APIC
  46 # include <mach_apic.h>
  47 #endif
  48
  49 static int __initdata acpi_force = 0;
  50
  51 #ifdef  CONFIG_ACPI
  52 int acpi_disabled = 0;
  53 #else
  54 int acpi_disabled = 1;
  55 #endif
  56 EXPORT_SYMBOL(acpi_disabled);
  57
  58 #ifdef  CONFIG_X86_64
  59
  60 #include <asm/proto.h>
  61
  62 #else                           /* X86 */
  63
  64 #ifdef  CONFIG_X86_LOCAL_APIC
  65 #include <mach_apic.h>
  66 #include <mach_mpparse.h>
  67 #endif                          /* CONFIG_X86_LOCAL_APIC */
  68
  69 #endif                          /* X86 */
  70
  71 #define BAD_MADT_ENTRY(entry, end) (                                        \
  72                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  73                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  74
  75 #define PREFIX                  "ACPI: "
  76
  77 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  78 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  79 EXPORT_SYMBOL(acpi_pci_disabled);
  80 int acpi_ht __initdata = 1;     /* enable HT */
  81
  82 int acpi_lapic;
  83 int acpi_ioapic;
  84 int acpi_strict;
  85
  86 u8 acpi_sci_flags __initdata;
  87 int acpi_sci_override_gsi __initdata;
  88 int acpi_skip_timer_override __initdata;
  89 int acpi_use_timer_override __initdata;
  90
  91 #ifdef CONFIG_X86_LOCAL_APIC
  92 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  93 #endif
  94
  95 #ifndef __HAVE_ARCH_CMPXCHG
  96 #warning ACPI uses CMPXCHG, i486 and later hardware
  97 #endif
  98
  99 /* --------------------------------------------------------------------------
 100                               Boot-time Configuration
 101    -------------------------------------------------------------------------- */
 102
 103 /*
 104  * The default interrupt routing model is PIC (8259).  This gets
 105  * overridden if IOAPICs are enumerated (below).
 106  */
 107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 108
 109
 110 /*
 111  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
 112  * to map the target physical address. The problem is that set_fixmap()
 113  * provides a single page, and it is possible that the page is not
 114  * sufficient.
 115  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 116  * i.e. until the next __va_range() call.
 117  *
 118  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 119  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 120  * count idx down while incrementing the phys address.
 121  */
 122 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 123 {
 124         unsigned long base, offset, mapped_size;
 125         int idx;
 126
 127         if (!phys || !size)
 128                 return NULL;
 129
 130         if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
 131                 return __va(phys);
 132
 133         offset = phys & (PAGE_SIZE - 1);
 134         mapped_size = PAGE_SIZE - offset;
 135         clear_fixmap(FIX_ACPI_END);
 136         set_fixmap(FIX_ACPI_END, phys);
 137         base = fix_to_virt(FIX_ACPI_END);
 138
 139         /*
 140          * Most cases can be covered by the below.
 141          */
 142         idx = FIX_ACPI_END;
 143         while (mapped_size < size) {
 144                 if (--idx < FIX_ACPI_BEGIN)
 145                         return NULL;    /* cannot handle this */
 146                 phys += PAGE_SIZE;
 147                 clear_fixmap(idx);
 148                 set_fixmap(idx, phys);
 149                 mapped_size += PAGE_SIZE;
 150         }
 151
 152         return ((unsigned char *)base + offset);
 153 }
 154
 155 #ifdef CONFIG_PCI_MMCONFIG
 156 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
 157 struct acpi_mcfg_allocation *pci_mmcfg_config;
 158 int pci_mmcfg_config_num;
 159
 160 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
 161
 162 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
 163 {
 164         if (!strcmp(mcfg->header.oem_id, "SGI"))
 165                 acpi_mcfg_64bit_base_addr = TRUE;
 166
 167         return 0;
 168 }
 169
 170 int __init acpi_parse_mcfg(struct acpi_table_header *header)
 171 {
 172         struct acpi_table_mcfg *mcfg;
 173         unsigned long i;
 174         int config_size;
 175
 176         if (!header)
 177                 return -EINVAL;
 178
 179         mcfg = (struct acpi_table_mcfg *)header;
 180
 181         /* how many config structures do we have */
 182         pci_mmcfg_config_num = 0;
 183         i = header->length - sizeof(struct acpi_table_mcfg);
 184         while (i >= sizeof(struct acpi_mcfg_allocation)) {
 185                 ++pci_mmcfg_config_num;
 186                 i -= sizeof(struct acpi_mcfg_allocation);
 187         };
 188         if (pci_mmcfg_config_num == 0) {
 189                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
 190                 return -ENODEV;
 191         }
 192
 193         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
 194         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
 195         if (!pci_mmcfg_config) {
 196                 printk(KERN_WARNING PREFIX
 197                        "No memory for MCFG config tables\n");
 198                 return -ENOMEM;
 199         }
 200
 201         memcpy(pci_mmcfg_config, &mcfg[1], config_size);
 202
 203         acpi_mcfg_oem_check(mcfg);
 204
 205         for (i = 0; i < pci_mmcfg_config_num; ++i) {
 206                 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
 207                     !acpi_mcfg_64bit_base_addr) {
 208                         printk(KERN_ERR PREFIX
 209                                "MMCONFIG not in low 4GB of memory\n");
 210                         kfree(pci_mmcfg_config);
 211                         pci_mmcfg_config_num = 0;
 212                         return -ENODEV;
 213                 }
 214         }
 215
 216         return 0;
 217 }
 218 #endif                          /* CONFIG_PCI_MMCONFIG */
 219
 220 #ifdef CONFIG_X86_LOCAL_APIC
 221 static int __init acpi_parse_madt(struct acpi_table_header *table)
 222 {
 223         struct acpi_table_madt *madt = NULL;
 224
 225         if (!cpu_has_apic)
 226                 return -EINVAL;
 227
 228         madt = (struct acpi_table_madt *)table;
 229         if (!madt) {
 230                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 231                 return -ENODEV;
 232         }
 233
 234         if (madt->address) {
 235                 acpi_lapic_addr = (u64) madt->address;
 236
 237                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 238                        madt->address);
 239         }
 240
 241         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
 242
 243         return 0;
 244 }
 245
 246 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 247 {
 248         unsigned int ver = 0;
 249
 250         if (!enabled) {
 251                 ++disabled_cpus;
 252                 return;
 253         }
 254
 255 #ifdef CONFIG_X86_32
 256         if (boot_cpu_physical_apicid != -1U)
 257                 ver = apic_version[boot_cpu_physical_apicid];
 258 #endif
 259
 260         generic_processor_info(id, ver);
 261 }
 262
 263 static int __init
 264 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 265 {
 266         struct acpi_madt_local_apic *processor = NULL;
 267
 268         processor = (struct acpi_madt_local_apic *)header;
 269
 270         if (BAD_MADT_ENTRY(processor, end))
 271                 return -EINVAL;
 272
 273         acpi_table_print_madt_entry(header);
 274
 275         /*
 276          * We need to register disabled CPU as well to permit
 277          * counting disabled CPUs. This allows us to size
 278          * cpus_possible_map more accurately, to permit
 279          * to not preallocating memory for all NR_CPUS
 280          * when we use CPU hotplug.
 281          */
 282         acpi_register_lapic(processor->id,      /* APIC ID */
 283                             processor->lapic_flags & ACPI_MADT_ENABLED);
 284
 285         return 0;
 286 }
 287
 288 static int __init
 289 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 290 {
 291         struct acpi_madt_local_sapic *processor = NULL;
 292
 293         processor = (struct acpi_madt_local_sapic *)header;
 294
 295         if (BAD_MADT_ENTRY(processor, end))
 296                 return -EINVAL;
 297
 298         acpi_table_print_madt_entry(header);
 299
 300         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 301                             processor->lapic_flags & ACPI_MADT_ENABLED);
 302
 303         return 0;
 304 }
 305
 306 static int __init
 307 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 308                           const unsigned long end)
 309 {
 310         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 311
 312         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 313
 314         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 315                 return -EINVAL;
 316
 317         acpi_lapic_addr = lapic_addr_ovr->address;
 318
 319         return 0;
 320 }
 321
 322 static int __init
 323 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 324 {
 325         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 326
 327         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 328
 329         if (BAD_MADT_ENTRY(lapic_nmi, end))
 330                 return -EINVAL;
 331
 332         acpi_table_print_madt_entry(header);
 333
 334         if (lapic_nmi->lint != 1)
 335                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 336
 337         return 0;
 338 }
 339
 340 #endif                          /*CONFIG_X86_LOCAL_APIC */
 341
 342 #ifdef CONFIG_X86_IO_APIC
 343
 344 static int __init
 345 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 346 {
 347         struct acpi_madt_io_apic *ioapic = NULL;
 348
 349         ioapic = (struct acpi_madt_io_apic *)header;
 350
 351         if (BAD_MADT_ENTRY(ioapic, end))
 352                 return -EINVAL;
 353
 354         acpi_table_print_madt_entry(header);
 355
 356         mp_register_ioapic(ioapic->id,
 357                            ioapic->address, ioapic->global_irq_base);
 358
 359         return 0;
 360 }
 361
 362 /*
 363  * Parse Interrupt Source Override for the ACPI SCI
 364  */
 365 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 366 {
 367         if (trigger == 0)       /* compatible SCI trigger is level */
 368                 trigger = 3;
 369
 370         if (polarity == 0)      /* compatible SCI polarity is low */
 371                 polarity = 3;
 372
 373         /* Command-line over-ride via acpi_sci= */
 374         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 375                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 376
 377         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 378                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 379
 380         /*
 381          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 382          * If GSI is < 16, this will update its flags,
 383          * else it will create a new mp_irqs[] entry.
 384          */
 385         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 386
 387         /*
 388          * stash over-ride to indicate we've been here
 389          * and for later update of acpi_gbl_FADT
 390          */
 391         acpi_sci_override_gsi = gsi;
 392         return;
 393 }
 394
 395 static int __init
 396 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 397                        const unsigned long end)
 398 {
 399         struct acpi_madt_interrupt_override *intsrc = NULL;
 400
 401         intsrc = (struct acpi_madt_interrupt_override *)header;
 402
 403         if (BAD_MADT_ENTRY(intsrc, end))
 404                 return -EINVAL;
 405
 406         acpi_table_print_madt_entry(header);
 407
 408         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 409                 acpi_sci_ioapic_setup(intsrc->global_irq,
 410                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 411                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
 412                 return 0;
 413         }
 414
 415         if (acpi_skip_timer_override &&
 416             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 417                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 418                 return 0;
 419         }
 420
 421         mp_override_legacy_irq(intsrc->source_irq,
 422                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 423                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 424                                 intsrc->global_irq);
 425
 426         return 0;
 427 }
 428
 429 static int __init
 430 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 431 {
 432         struct acpi_madt_nmi_source *nmi_src = NULL;
 433
 434         nmi_src = (struct acpi_madt_nmi_source *)header;
 435
 436         if (BAD_MADT_ENTRY(nmi_src, end))
 437                 return -EINVAL;
 438
 439         acpi_table_print_madt_entry(header);
 440
 441         /* TBD: Support nimsrc entries? */
 442
 443         return 0;
 444 }
 445
 446 #endif                          /* CONFIG_X86_IO_APIC */
 447
 448 /*
 449  * acpi_pic_sci_set_trigger()
 450  *
 451  * use ELCR to set PIC-mode trigger type for SCI
 452  *
 453  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 454  * it may require Edge Trigger -- use "acpi_sci=edge"
 455  *
 456  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 457  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 458  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 459  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 460  */
 461
 462 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 463 {
 464         unsigned int mask = 1 << irq;
 465         unsigned int old, new;
 466
 467         /* Real old ELCR mask */
 468         old = inb(0x4d0) | (inb(0x4d1) << 8);
 469
 470         /*
 471          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 472          * since we will set it correctly as we enable the PCI irq
 473          * routing.
 474          */
 475         new = acpi_noirq ? old : 0;
 476
 477         /*
 478          * Update SCI information in the ELCR, it isn't in the PCI
 479          * routing tables..
 480          */
 481         switch (trigger) {
 482         case 1:         /* Edge - clear */
 483                 new &= ~mask;
 484                 break;
 485         case 3:         /* Level - set */
 486                 new |= mask;
 487                 break;
 488         }
 489
 490         if (old == new)
 491                 return;
 492
 493         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 494         outb(new, 0x4d0);
 495         outb(new >> 8, 0x4d1);
 496 }
 497
 498 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 499 {
 500         *irq = gsi;
 501         return 0;
 502 }
 503
 504 /*
 505  * success: return IRQ number (>=0)
 506  * failure: return < 0
 507  */
 508 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
 509 {
 510         unsigned int irq;
 511         unsigned int plat_gsi = gsi;
 512
 513 #ifdef CONFIG_PCI
 514         /*
 515          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 516          */
 517         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 518                 if (triggering == ACPI_LEVEL_SENSITIVE)
 519                         eisa_set_level_irq(gsi);
 520         }
 521 #endif
 522
 523 #ifdef CONFIG_X86_IO_APIC
 524         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 525                 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
 526         }
 527 #endif
 528         acpi_gsi_to_irq(plat_gsi, &irq);
 529         return irq;
 530 }
 531
 532 /*
 533  *  ACPI based hotplug support for CPU
 534  */
 535 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 536
 537 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 538 {
 539         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 540         union acpi_object *obj;
 541         struct acpi_madt_local_apic *lapic;
 542         cpumask_t tmp_map, new_map;
 543         u8 physid;
 544         int cpu;
 545
 546         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 547                 return -EINVAL;
 548
 549         if (!buffer.length || !buffer.pointer)
 550                 return -EINVAL;
 551
 552         obj = buffer.pointer;
 553         if (obj->type != ACPI_TYPE_BUFFER ||
 554             obj->buffer.length < sizeof(*lapic)) {
 555                 kfree(buffer.pointer);
 556                 return -EINVAL;
 557         }
 558
 559         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 560
 561         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 562             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 563                 kfree(buffer.pointer);
 564                 return -EINVAL;
 565         }
 566
 567         physid = lapic->id;
 568
 569         kfree(buffer.pointer);
 570         buffer.length = ACPI_ALLOCATE_BUFFER;
 571         buffer.pointer = NULL;
 572
 573         tmp_map = cpu_present_map;
 574         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 575
 576         /*
 577          * If mp_register_lapic successfully generates a new logical cpu
 578          * number, then the following will get us exactly what was mapped
 579          */
 580         cpus_andnot(new_map, cpu_present_map, tmp_map);
 581         if (cpus_empty(new_map)) {
 582                 printk ("Unable to map lapic to logical cpu number\n");
 583                 return -EINVAL;
 584         }
 585
 586         cpu = first_cpu(new_map);
 587
 588         *pcpu = cpu;
 589         return 0;
 590 }
 591
 592 /* wrapper to silence section mismatch warning */
 593 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 594 {
 595         return _acpi_map_lsapic(handle, pcpu);
 596 }
 597 EXPORT_SYMBOL(acpi_map_lsapic);
 598
 599 int acpi_unmap_lsapic(int cpu)
 600 {
 601         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 602         cpu_clear(cpu, cpu_present_map);
 603         num_processors--;
 604
 605         return (0);
 606 }
 607
 608 EXPORT_SYMBOL(acpi_unmap_lsapic);
 609 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 610
 611 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 612 {
 613         /* TBD */
 614         return -EINVAL;
 615 }
 616
 617 EXPORT_SYMBOL(acpi_register_ioapic);
 618
 619 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 620 {
 621         /* TBD */
 622         return -EINVAL;
 623 }
 624
 625 EXPORT_SYMBOL(acpi_unregister_ioapic);
 626
 627 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 628 {
 629         struct acpi_table_boot *sb;
 630
 631         sb = (struct acpi_table_boot *)table;
 632         if (!sb) {
 633                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 634                 return -ENODEV;
 635         }
 636
 637         sbf_port = sb->cmos_index;      /* Save CMOS port */
 638
 639         return 0;
 640 }
 641
 642 #ifdef CONFIG_HPET_TIMER
 643 #include <asm/hpet.h>
 644
 645 static struct __initdata resource *hpet_res;
 646
 647 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 648 {
 649         struct acpi_table_hpet *hpet_tbl;
 650
 651         hpet_tbl = (struct acpi_table_hpet *)table;
 652         if (!hpet_tbl) {
 653                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 654                 return -ENODEV;
 655         }
 656
 657         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 658                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 659                        "memory.\n");
 660                 return -1;
 661         }
 662
 663         hpet_address = hpet_tbl->address.address;
 664
 665         /*
 666          * Some broken BIOSes advertise HPET at 0x0. We really do not
 667          * want to allocate a resource there.
 668          */
 669         if (!hpet_address) {
 670                 printk(KERN_WARNING PREFIX
 671                        "HPET id: %#x base: %#lx is invalid\n",
 672                        hpet_tbl->id, hpet_address);
 673                 return 0;
 674         }
 675 #ifdef CONFIG_X86_64
 676         /*
 677          * Some even more broken BIOSes advertise HPET at
 678          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 679          * some noise:
 680          */
 681         if (hpet_address == 0xfed0000000000000UL) {
 682                 if (!hpet_force_user) {
 683                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 684                                "base: 0xfed0000000000000 is bogus\n "
 685                                "try hpet=force on the kernel command line to "
 686                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 687                         hpet_address = 0;
 688                         return 0;
 689                 }
 690                 printk(KERN_WARNING PREFIX
 691                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 692                        "to 0xfed00000.\n", hpet_tbl->id);
 693                 hpet_address >>= 32;
 694         }
 695 #endif
 696         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 697                hpet_tbl->id, hpet_address);
 698
 699         /*
 700          * Allocate and initialize the HPET firmware resource for adding into
 701          * the resource tree during the lateinit timeframe.
 702          */
 703 #define HPET_RESOURCE_NAME_SIZE 9
 704         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 705
 706         hpet_res->name = (void *)&hpet_res[1];
 707         hpet_res->flags = IORESOURCE_MEM;
 708         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 709                  hpet_tbl->sequence);
 710
 711         hpet_res->start = hpet_address;
 712         hpet_res->end = hpet_address + (1 * 1024) - 1;
 713
 714         return 0;
 715 }
 716
 717 /*
 718  * hpet_insert_resource inserts the HPET resources used into the resource
 719  * tree.
 720  */
 721 static __init int hpet_insert_resource(void)
 722 {
 723         if (!hpet_res)
 724                 return 1;
 725
 726         return insert_resource(&iomem_resource, hpet_res);
 727 }
 728
 729 late_initcall(hpet_insert_resource);
 730
 731 #else
 732 #define acpi_parse_hpet NULL
 733 #endif
 734
 735 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 736 {
 737
 738 #ifdef CONFIG_X86_PM_TIMER
 739         /* detect the location of the ACPI PM Timer */
 740         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 741                 /* FADT rev. 2 */
 742                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 743                     ACPI_ADR_SPACE_SYSTEM_IO)
 744                         return 0;
 745
 746                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 747                 /*
 748                  * "X" fields are optional extensions to the original V1.0
 749                  * fields, so we must selectively expand V1.0 fields if the
 750                  * corresponding X field is zero.
 751                  */
 752                 if (!pmtmr_ioport)
 753                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 754         } else {
 755                 /* FADT rev. 1 */
 756                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 757         }
 758         if (pmtmr_ioport)
 759                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 760                        pmtmr_ioport);
 761 #endif
 762         return 0;
 763 }
 764
 765 #ifdef  CONFIG_X86_LOCAL_APIC
 766 /*
 767  * Parse LAPIC entries in MADT
 768  * returns 0 on success, < 0 on error
 769  */
 770
 771 static void __init acpi_register_lapic_address(unsigned long address)
 772 {
 773         mp_lapic_addr = address;
 774
 775         set_fixmap_nocache(FIX_APIC_BASE, address);
 776         if (boot_cpu_physical_apicid == -1U) {
 777                 boot_cpu_physical_apicid  = read_apic_id();
 778 #ifdef CONFIG_X86_32
 779                 apic_version[boot_cpu_physical_apicid] =
 780                          GET_APIC_VERSION(apic_read(APIC_LVR));
 781 #endif
 782         }
 783 }
 784
 785 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 786 {
 787         int count;
 788
 789         if (!cpu_has_apic)
 790                 return -ENODEV;
 791
 792         /*
 793          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 794          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 795          */
 796
 797         count =
 798             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 799                                   acpi_parse_lapic_addr_ovr, 0);
 800         if (count < 0) {
 801                 printk(KERN_ERR PREFIX
 802                        "Error parsing LAPIC address override entry\n");
 803                 return count;
 804         }
 805
 806         acpi_register_lapic_address(acpi_lapic_addr);
 807
 808         return count;
 809 }
 810
 811 static int __init acpi_parse_madt_lapic_entries(void)
 812 {
 813         int count;
 814
 815         if (!cpu_has_apic)
 816                 return -ENODEV;
 817
 818         /*
 819          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 820          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 821          */
 822
 823         count =
 824             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 825                                   acpi_parse_lapic_addr_ovr, 0);
 826         if (count < 0) {
 827                 printk(KERN_ERR PREFIX
 828                        "Error parsing LAPIC address override entry\n");
 829                 return count;
 830         }
 831
 832         acpi_register_lapic_address(acpi_lapic_addr);
 833
 834         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 835                                       acpi_parse_sapic, MAX_APICS);
 836
 837         if (!count)
 838                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 839                                               acpi_parse_lapic, MAX_APICS);
 840         if (!count) {
 841                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 842                 /* TBD: Cleanup to allow fallback to MPS */
 843                 return -ENODEV;
 844         } else if (count < 0) {
 845                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 846                 /* TBD: Cleanup to allow fallback to MPS */
 847                 return count;
 848         }
 849
 850         count =
 851             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 852         if (count < 0) {
 853                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 854                 /* TBD: Cleanup to allow fallback to MPS */
 855                 return count;
 856         }
 857         return 0;
 858 }
 859 #endif                          /* CONFIG_X86_LOCAL_APIC */
 860
 861 #ifdef  CONFIG_X86_IO_APIC
 862 #define MP_ISA_BUS              0
 863
 864 #ifdef CONFIG_X86_ES7000
 865 extern int es7000_plat;
 866 #endif
 867
 868 static struct {
 869         int apic_id;
 870         int gsi_base;
 871         int gsi_end;
 872         DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
 873 } mp_ioapic_routing[MAX_IO_APICS];
 874
 875 static int mp_find_ioapic(int gsi)
 876 {
 877         int i = 0;
 878
 879         /* Find the IOAPIC that manages this GSI. */
 880         for (i = 0; i < nr_ioapics; i++) {
 881                 if ((gsi >= mp_ioapic_routing[i].gsi_base)
 882                     && (gsi <= mp_ioapic_routing[i].gsi_end))
 883                         return i;
 884         }
 885
 886         printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
 887         return -1;
 888 }
 889
 890 static u8 __init uniq_ioapic_id(u8 id)
 891 {
 892 #ifdef CONFIG_X86_32
 893         if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
 894             !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
 895                 return io_apic_get_unique_id(nr_ioapics, id);
 896         else
 897                 return id;
 898 #else
 899         int i;
 900         DECLARE_BITMAP(used, 256);
 901         bitmap_zero(used, 256);
 902         for (i = 0; i < nr_ioapics; i++) {
 903                 struct mp_config_ioapic *ia = &mp_ioapics[i];
 904                 __set_bit(ia->mp_apicid, used);
 905         }
 906         if (!test_bit(id, used))
 907                 return id;
 908         return find_first_zero_bit(used, 256);
 909 #endif
 910 }
 911
 912 static int bad_ioapic(unsigned long address)
 913 {
 914         if (nr_ioapics >= MAX_IO_APICS) {
 915                 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
 916                        "(found %d)\n", MAX_IO_APICS, nr_ioapics);
 917                 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
 918         }
 919         if (!address) {
 920                 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
 921                        " found in table, skipping!\n");
 922                 return 1;
 923         }
 924         return 0;
 925 }
 926
 927 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
 928 {
 929         int idx = 0;
 930
 931         if (bad_ioapic(address))
 932                 return;
 933
 934         idx = nr_ioapics;
 935
 936         mp_ioapics[idx].mp_type = MP_IOAPIC;
 937         mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
 938         mp_ioapics[idx].mp_apicaddr = address;
 939
 940         set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
 941         mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
 942 #ifdef CONFIG_X86_32
 943         mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
 944 #else
 945         mp_ioapics[idx].mp_apicver = 0;
 946 #endif
 947         /*
 948          * Build basic GSI lookup table to facilitate gsi->io_apic lookups
 949          * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
 950          */
 951         mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
 952         mp_ioapic_routing[idx].gsi_base = gsi_base;
 953         mp_ioapic_routing[idx].gsi_end = gsi_base +
 954             io_apic_get_redir_entries(idx);
 955
 956         printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
 957                "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
 958                mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
 959                mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
 960
 961         nr_ioapics++;
 962 }
 963
 964 static void assign_to_mp_irq(struct mp_config_intsrc *m,
 965                                     struct mp_config_intsrc *mp_irq)
 966 {
 967         memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
 968 }
 969
 970 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
 971                                 struct mp_config_intsrc *m)
 972 {
 973         return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
 974 }
 975
 976 static void save_mp_irq(struct mp_config_intsrc *m)
 977 {
 978         int i;
 979
 980         for (i = 0; i < mp_irq_entries; i++) {
 981                 if (!mp_irq_cmp(&mp_irqs[i], m))
 982                         return;
 983         }
 984
 985         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
 986         if (++mp_irq_entries == MAX_IRQ_SOURCES)
 987                 panic("Max # of irq sources exceeded!!\n");
 988 }
 989
 990 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 991 {
 992         int ioapic;
 993         int pin;
 994         struct mp_config_intsrc mp_irq;
 995
 996         /*
 997          * Convert 'gsi' to 'ioapic.pin'.
 998          */
 999         ioapic = mp_find_ioapic(gsi);
1000         if (ioapic < 0)
1001                 return;
1002         pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1003
1004         /*
1005          * TBD: This check is for faulty timer entries, where the override
1006          *      erroneously sets the trigger to level, resulting in a HUGE
1007          *      increase of timer interrupts!
1008          */
1009         if ((bus_irq == 0) && (trigger == 3))
1010                 trigger = 1;
1011
1012         mp_irq.mp_type = MP_INTSRC;
1013         mp_irq.mp_irqtype = mp_INT;
1014         mp_irq.mp_irqflag = (trigger << 2) | polarity;
1015         mp_irq.mp_srcbus = MP_ISA_BUS;
1016         mp_irq.mp_srcbusirq = bus_irq;  /* IRQ */
1017         mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
1018         mp_irq.mp_dstirq = pin; /* INTIN# */
1019
1020         save_mp_irq(&mp_irq);
1021 }
1022
1023 void __init mp_config_acpi_legacy_irqs(void)
1024 {
1025         int i;
1026         int ioapic;
1027         unsigned int dstapic;
1028         struct mp_config_intsrc mp_irq;
1029
1030 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1031         /*
1032          * Fabricate the legacy ISA bus (bus #31).
1033          */
1034         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1035 #endif
1036         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1037         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1038
1039 #ifdef CONFIG_X86_ES7000
1040         /*
1041          * Older generations of ES7000 have no legacy identity mappings
1042          */
1043         if (es7000_plat == 1)
1044                 return;
1045 #endif
1046
1047         /*
1048          * Locate the IOAPIC that manages the ISA IRQs (0-15).
1049          */
1050         ioapic = mp_find_ioapic(0);
1051         if (ioapic < 0)
1052                 return;
1053         dstapic = mp_ioapics[ioapic].mp_apicid;
1054
1055         /*
1056          * Use the default configuration for the IRQs 0-15.  Unless
1057          * overridden by (MADT) interrupt source override entries.
1058          */
1059         for (i = 0; i < 16; i++) {
1060                 int idx;
1061
1062                 for (idx = 0; idx < mp_irq_entries; idx++) {
1063                         struct mp_config_intsrc *irq = mp_irqs + idx;
1064
1065                         /* Do we already have a mapping for this ISA IRQ? */
1066                         if (irq->mp_srcbus == MP_ISA_BUS
1067                             && irq->mp_srcbusirq == i)
1068                                 break;
1069
1070                         /* Do we already have a mapping for this IOAPIC pin */
1071                         if (irq->mp_dstapic == dstapic &&
1072                             irq->mp_dstirq == i)
1073                                 break;
1074                 }
1075
1076                 if (idx != mp_irq_entries) {
1077                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1078                         continue;       /* IRQ already used */
1079                 }
1080
1081                 mp_irq.mp_type = MP_INTSRC;
1082                 mp_irq.mp_irqflag = 0;  /* Conforming */
1083                 mp_irq.mp_srcbus = MP_ISA_BUS;
1084                 mp_irq.mp_dstapic = dstapic;
1085                 mp_irq.mp_irqtype = mp_INT;
1086                 mp_irq.mp_srcbusirq = i; /* Identity mapped */
1087                 mp_irq.mp_dstirq = i;
1088
1089                 save_mp_irq(&mp_irq);
1090         }
1091 }
1092
1093 int mp_register_gsi(u32 gsi, int triggering, int polarity)
1094 {
1095         int ioapic;
1096         int ioapic_pin;
1097 #ifdef CONFIG_X86_32
1098 #define MAX_GSI_NUM     4096
1099 #define IRQ_COMPRESSION_START   64
1100
1101         static int pci_irq = IRQ_COMPRESSION_START;
1102         /*
1103          * Mapping between Global System Interrupts, which
1104          * represent all possible interrupts, and IRQs
1105          * assigned to actual devices.
1106          */
1107         static int gsi_to_irq[MAX_GSI_NUM];
1108 #else
1109
1110         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1111                 return gsi;
1112 #endif
1113
1114         /* Don't set up the ACPI SCI because it's already set up */
1115         if (acpi_gbl_FADT.sci_interrupt == gsi)
1116                 return gsi;
1117
1118         ioapic = mp_find_ioapic(gsi);
1119         if (ioapic < 0) {
1120                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1121                 return gsi;
1122         }
1123
1124         ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
1125
1126 #ifdef CONFIG_X86_32
1127         if (ioapic_renumber_irq)
1128                 gsi = ioapic_renumber_irq(ioapic, gsi);
1129 #endif
1130
1131         /*
1132          * Avoid pin reprogramming.  PRTs typically include entries
1133          * with redundant pin->gsi mappings (but unique PCI devices);
1134          * we only program the IOAPIC on the first.
1135          */
1136         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1137                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1138                        "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
1139                        ioapic_pin);
1140                 return gsi;
1141         }
1142         if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
1143                 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n",
1144                          mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
1145 #ifdef CONFIG_X86_32
1146                 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
1147 #else
1148                 return gsi;
1149 #endif
1150         }
1151
1152         set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
1153 #ifdef CONFIG_X86_32
1154         /*
1155          * For GSI >= 64, use IRQ compression
1156          */
1157         if ((gsi >= IRQ_COMPRESSION_START)
1158             && (triggering == ACPI_LEVEL_SENSITIVE)) {
1159                 /*
1160                  * For PCI devices assign IRQs in order, avoiding gaps
1161                  * due to unused I/O APIC pins.
1162                  */
1163                 int irq = gsi;
1164                 if (gsi < MAX_GSI_NUM) {
1165                         /*
1166                          * Retain the VIA chipset work-around (gsi > 15), but
1167                          * avoid a problem where the 8254 timer (IRQ0) is setup
1168                          * via an override (so it's not on pin 0 of the ioapic),
1169                          * and at the same time, the pin 0 interrupt is a PCI
1170                          * type.  The gsi > 15 test could cause these two pins
1171                          * to be shared as IRQ0, and they are not shareable.
1172                          * So test for this condition, and if necessary, avoid
1173                          * the pin collision.
1174                          */
1175                         gsi = pci_irq++;
1176                         /*
1177                          * Don't assign IRQ used by ACPI SCI
1178                          */
1179                         if (gsi == acpi_gbl_FADT.sci_interrupt)
1180                                 gsi = pci_irq++;
1181                         gsi_to_irq[irq] = gsi;
1182                 } else {
1183                         printk(KERN_ERR "GSI %u is too high\n", gsi);
1184                         return gsi;
1185                 }
1186         }
1187 #endif
1188         io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
1189                                 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1190                                 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1191         return gsi;
1192 }
1193
1194 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
1195                         u32 gsi, int triggering, int polarity)
1196 {
1197 #ifdef CONFIG_X86_MPPARSE
1198         struct mp_config_intsrc mp_irq;
1199         int ioapic;
1200
1201         if (!acpi_ioapic)
1202                 return 0;
1203
1204         /* print the entry should happen on mptable identically */
1205         mp_irq.mp_type = MP_INTSRC;
1206         mp_irq.mp_irqtype = mp_INT;
1207         mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1208                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1209         mp_irq.mp_srcbus = number;
1210         mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1211         ioapic = mp_find_ioapic(gsi);
1212         mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
1213         mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
1214
1215         save_mp_irq(&mp_irq);
1216 #endif
1217         return 0;
1218 }
1219
1220 /*
1221  * Parse IOAPIC related entries in MADT
1222  * returns 0 on success, < 0 on error
1223  */
1224 static int __init acpi_parse_madt_ioapic_entries(void)
1225 {
1226         int count;
1227
1228         /*
1229          * ACPI interpreter is required to complete interrupt setup,
1230          * so if it is off, don't enumerate the io-apics with ACPI.
1231          * If MPS is present, it will handle them,
1232          * otherwise the system will stay in PIC mode
1233          */
1234         if (acpi_disabled || acpi_noirq) {
1235                 return -ENODEV;
1236         }
1237
1238         if (!cpu_has_apic)
1239                 return -ENODEV;
1240
1241         /*
1242          * if "noapic" boot option, don't look for IO-APICs
1243          */
1244         if (skip_ioapic_setup) {
1245                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1246                        "due to 'noapic' option.\n");
1247                 return -ENODEV;
1248         }
1249
1250         count =
1251             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1252                                   MAX_IO_APICS);
1253         if (!count) {
1254                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1255                 return -ENODEV;
1256         } else if (count < 0) {
1257                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1258                 return count;
1259         }
1260
1261         count =
1262             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1263                                   NR_IRQ_VECTORS);
1264         if (count < 0) {
1265                 printk(KERN_ERR PREFIX
1266                        "Error parsing interrupt source overrides entry\n");
1267                 /* TBD: Cleanup to allow fallback to MPS */
1268                 return count;
1269         }
1270
1271         /*
1272          * If BIOS did not supply an INT_SRC_OVR for the SCI
1273          * pretend we got one so we can set the SCI flags.
1274          */
1275         if (!acpi_sci_override_gsi)
1276                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1277
1278         /* Fill in identity legacy mapings where no override */
1279         mp_config_acpi_legacy_irqs();
1280
1281         count =
1282             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1283                                   NR_IRQ_VECTORS);
1284         if (count < 0) {
1285                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1286                 /* TBD: Cleanup to allow fallback to MPS */
1287                 return count;
1288         }
1289
1290         return 0;
1291 }
1292 #else
1293 static inline int acpi_parse_madt_ioapic_entries(void)
1294 {
1295         return -1;
1296 }
1297 #endif  /* !CONFIG_X86_IO_APIC */
1298
1299 static void __init early_acpi_process_madt(void)
1300 {
1301 #ifdef CONFIG_X86_LOCAL_APIC
1302         int error;
1303
1304         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1305
1306                 /*
1307                  * Parse MADT LAPIC entries
1308                  */
1309                 error = early_acpi_parse_madt_lapic_addr_ovr();
1310                 if (!error) {
1311                         acpi_lapic = 1;
1312                         smp_found_config = 1;
1313                 }
1314                 if (error == -EINVAL) {
1315                         /*
1316                          * Dell Precision Workstation 410, 610 come here.
1317                          */
1318                         printk(KERN_ERR PREFIX
1319                                "Invalid BIOS MADT, disabling ACPI\n");
1320                         disable_acpi();
1321                 }
1322         }
1323 #endif
1324 }
1325
1326 static void __init acpi_process_madt(void)
1327 {
1328 #ifdef CONFIG_X86_LOCAL_APIC
1329         int error;
1330
1331         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1332
1333                 /*
1334                  * Parse MADT LAPIC entries
1335                  */
1336                 error = acpi_parse_madt_lapic_entries();
1337                 if (!error) {
1338                         acpi_lapic = 1;
1339
1340 #ifdef CONFIG_X86_GENERICARCH
1341                         generic_bigsmp_probe();
1342 #endif
1343                         /*
1344                          * Parse MADT IO-APIC entries
1345                          */
1346                         error = acpi_parse_madt_ioapic_entries();
1347                         if (!error) {
1348                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1349                                 acpi_irq_balance_set(NULL);
1350                                 acpi_ioapic = 1;
1351
1352                                 smp_found_config = 1;
1353 #ifdef CONFIG_X86_32
1354                                 setup_apic_routing();
1355 #endif
1356                         }
1357                 }
1358                 if (error == -EINVAL) {
1359                         /*
1360                          * Dell Precision Workstation 410, 610 come here.
1361                          */
1362                         printk(KERN_ERR PREFIX
1363                                "Invalid BIOS MADT, disabling ACPI\n");
1364                         disable_acpi();
1365                 }
1366         }
1367 #endif
1368         return;
1369 }
1370
1371 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1372 {
1373         if (!acpi_force) {
1374                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1375                        d->ident);
1376                 acpi_noirq_set();
1377         }
1378         return 0;
1379 }
1380
1381 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1382 {
1383         if (!acpi_force) {
1384                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1385                        d->ident);
1386                 acpi_disable_pci();
1387         }
1388         return 0;
1389 }
1390
1391 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1392 {
1393         if (!acpi_force) {
1394                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1395                 disable_acpi();
1396         } else {
1397                 printk(KERN_NOTICE
1398                        "Warning: DMI blacklist says broken, but acpi forced\n");
1399         }
1400         return 0;
1401 }
1402
1403 /*
1404  * Limit ACPI to CPU enumeration for HT
1405  */
1406 static int __init force_acpi_ht(const struct dmi_system_id *d)
1407 {
1408         if (!acpi_force) {
1409                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1410                        d->ident);
1411                 disable_acpi();
1412                 acpi_ht = 1;
1413         } else {
1414                 printk(KERN_NOTICE
1415                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1416         }
1417         return 0;
1418 }
1419
1420 /*
1421  * Force ignoring BIOS IRQ0 pin2 override
1422  */
1423 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1424 {
1425         pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
1426         acpi_skip_timer_override = 1;
1427         return 0;
1428 }
1429
1430 /*
1431  * If your system is blacklisted here, but you find that acpi=force
1432  * works for you, please contact acpi-devel@sourceforge.net
1433  */
1434 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1435         /*
1436          * Boxes that need ACPI disabled
1437          */
1438         {
1439          .callback = dmi_disable_acpi,
1440          .ident = "IBM Thinkpad",
1441          .matches = {
1442                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1443                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1444                      },
1445          },
1446
1447         /*
1448          * Boxes that need acpi=ht
1449          */
1450         {
1451          .callback = force_acpi_ht,
1452          .ident = "FSC Primergy T850",
1453          .matches = {
1454                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1455                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1456                      },
1457          },
1458         {
1459          .callback = force_acpi_ht,
1460          .ident = "HP VISUALIZE NT Workstation",
1461          .matches = {
1462                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1463                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1464                      },
1465          },
1466         {
1467          .callback = force_acpi_ht,
1468          .ident = "Compaq Workstation W8000",
1469          .matches = {
1470                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1471                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1472                      },
1473          },
1474         {
1475          .callback = force_acpi_ht,
1476          .ident = "ASUS P4B266",
1477          .matches = {
1478                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1479                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1480                      },
1481          },
1482         {
1483          .callback = force_acpi_ht,
1484          .ident = "ASUS P2B-DS",
1485          .matches = {
1486                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1487                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1488                      },
1489          },
1490         {
1491          .callback = force_acpi_ht,
1492          .ident = "ASUS CUR-DLS",
1493          .matches = {
1494                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1495                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1496                      },
1497          },
1498         {
1499          .callback = force_acpi_ht,
1500          .ident = "ABIT i440BX-W83977",
1501          .matches = {
1502                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1503                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1504                      },
1505          },
1506         {
1507          .callback = force_acpi_ht,
1508          .ident = "IBM Bladecenter",
1509          .matches = {
1510                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1511                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1512                      },
1513          },
1514         {
1515          .callback = force_acpi_ht,
1516          .ident = "IBM eServer xSeries 360",
1517          .matches = {
1518                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1519                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1520                      },
1521          },
1522         {
1523          .callback = force_acpi_ht,
1524          .ident = "IBM eserver xSeries 330",
1525          .matches = {
1526                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1527                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1528                      },
1529          },
1530         {
1531          .callback = force_acpi_ht,
1532          .ident = "IBM eserver xSeries 440",
1533          .matches = {
1534                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1535                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1536                      },
1537          },
1538
1539         /*
1540          * Boxes that need ACPI PCI IRQ routing disabled
1541          */
1542         {
1543          .callback = disable_acpi_irq,
1544          .ident = "ASUS A7V",
1545          .matches = {
1546                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1547                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1548                      /* newer BIOS, Revision 1011, does work */
1549                      DMI_MATCH(DMI_BIOS_VERSION,
1550                                "ASUS A7V ACPI BIOS Revision 1007"),
1551                      },
1552          },
1553         {
1554                 /*
1555                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1556                  * for LPC bridge, which is needed for the PCI
1557                  * interrupt links to work. DSDT fix is in bug 5966.
1558                  * 2645, 2646 model numbers are shared with 600/600E/600X
1559                  */
1560          .callback = disable_acpi_irq,
1561          .ident = "IBM Thinkpad 600 Series 2645",
1562          .matches = {
1563                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1564                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1565                      },
1566          },
1567         {
1568          .callback = disable_acpi_irq,
1569          .ident = "IBM Thinkpad 600 Series 2646",
1570          .matches = {
1571                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1572                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1573                      },
1574          },
1575         /*
1576          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1577          */
1578         {                       /* _BBN 0 bug */
1579          .callback = disable_acpi_pci,
1580          .ident = "ASUS PR-DLS",
1581          .matches = {
1582                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1583                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1584                      DMI_MATCH(DMI_BIOS_VERSION,
1585                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1586                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1587                      },
1588          },
1589         {
1590          .callback = disable_acpi_pci,
1591          .ident = "Acer TravelMate 36x Laptop",
1592          .matches = {
1593                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1594                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1595                      },
1596          },
1597         /*
1598          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1599          * which includes some code which overrides all temperature
1600          * trip points to 16C if the INTIN2 input of the I/O APIC
1601          * is enabled.  This input is incorrectly designated the
1602          * ISA IRQ 0 via an interrupt source override even though
1603          * it is wired to the output of the master 8259A and INTIN0
1604          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1605          * override in that cases.
1606          */
1607         {
1608          .callback = dmi_ignore_irq0_timer_override,
1609          .ident = "HP NX6125 laptop",
1610          .matches = {
1611                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1612                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1613                      },
1614          },
1615         {
1616          .callback = dmi_ignore_irq0_timer_override,
1617          .ident = "HP NX6325 laptop",
1618          .matches = {
1619                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1620                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1621                      },
1622          },
1623         {}
1624 };
1625
1626 /*
1627  * acpi_boot_table_init() and acpi_boot_init()
1628  *  called from setup_arch(), always.
1629  *      1. checksums all tables
1630  *      2. enumerates lapics
1631  *      3. enumerates io-apics
1632  *
1633  * acpi_table_init() is separate to allow reading SRAT without
1634  * other side effects.
1635  *
1636  * side effects of acpi_boot_init:
1637  *      acpi_lapic = 1 if LAPIC found
1638  *      acpi_ioapic = 1 if IOAPIC found
1639  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1640  *      if acpi_blacklisted() acpi_disabled = 1;
1641  *      acpi_irq_model=...
1642  *      ...
1643  *
1644  * return value: (currently ignored)
1645  *      0: success
1646  *      !0: failure
1647  */
1648
1649 int __init acpi_boot_table_init(void)
1650 {
1651         int error;
1652
1653         dmi_check_system(acpi_dmi_table);
1654
1655         /*
1656          * If acpi_disabled, bail out
1657          * One exception: acpi=ht continues far enough to enumerate LAPICs
1658          */
1659         if (acpi_disabled && !acpi_ht)
1660                 return 1;
1661
1662         /*
1663          * Initialize the ACPI boot-time table parser.
1664          */
1665         error = acpi_table_init();
1666         if (error) {
1667                 disable_acpi();
1668                 return error;
1669         }
1670
1671         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1672
1673         /*
1674          * blacklist may disable ACPI entirely
1675          */
1676         error = acpi_blacklisted();
1677         if (error) {
1678                 if (acpi_force) {
1679                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1680                 } else {
1681                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1682                         disable_acpi();
1683                         return error;
1684                 }
1685         }
1686
1687         return 0;
1688 }
1689
1690 int __init early_acpi_boot_init(void)
1691 {
1692         /*
1693          * If acpi_disabled, bail out
1694          * One exception: acpi=ht continues far enough to enumerate LAPICs
1695          */
1696         if (acpi_disabled && !acpi_ht)
1697                 return 1;
1698
1699         /*
1700          * Process the Multiple APIC Description Table (MADT), if present
1701          */
1702         early_acpi_process_madt();
1703
1704         return 0;
1705 }
1706
1707 int __init acpi_boot_init(void)
1708 {
1709         /*
1710          * If acpi_disabled, bail out
1711          * One exception: acpi=ht continues far enough to enumerate LAPICs
1712          */
1713         if (acpi_disabled && !acpi_ht)
1714                 return 1;
1715
1716         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1717
1718         /*
1719          * set sci_int and PM timer address
1720          */
1721         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1722
1723         /*
1724          * Process the Multiple APIC Description Table (MADT), if present
1725          */
1726         acpi_process_madt();
1727
1728         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1729
1730         return 0;
1731 }
1732
1733 static int __init parse_acpi(char *arg)
1734 {
1735         if (!arg)
1736                 return -EINVAL;
1737
1738         /* "acpi=off" disables both ACPI table parsing and interpreter */
1739         if (strcmp(arg, "off") == 0) {
1740                 disable_acpi();
1741         }
1742         /* acpi=force to over-ride black-list */
1743         else if (strcmp(arg, "force") == 0) {
1744                 acpi_force = 1;
1745                 acpi_ht = 1;
1746                 acpi_disabled = 0;
1747         }
1748         /* acpi=strict disables out-of-spec workarounds */
1749         else if (strcmp(arg, "strict") == 0) {
1750                 acpi_strict = 1;
1751         }
1752         /* Limit ACPI just to boot-time to enable HT */
1753         else if (strcmp(arg, "ht") == 0) {
1754                 if (!acpi_force)
1755                         disable_acpi();
1756                 acpi_ht = 1;
1757         }
1758         /* "acpi=noirq" disables ACPI interrupt routing */
1759         else if (strcmp(arg, "noirq") == 0) {
1760                 acpi_noirq_set();
1761         } else {
1762                 /* Core will printk when we return error. */
1763                 return -EINVAL;
1764         }
1765         return 0;
1766 }
1767 early_param("acpi", parse_acpi);
1768
1769 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1770 static int __init parse_pci(char *arg)
1771 {
1772         if (arg && strcmp(arg, "noacpi") == 0)
1773                 acpi_disable_pci();
1774         return 0;
1775 }
1776 early_param("pci", parse_pci);
1777
1778 int __init acpi_mps_check(void)
1779 {
1780 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1781 /* mptable code is not built-in*/
1782         if (acpi_disabled || acpi_noirq) {
1783                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1784                        "Using acpi=off or acpi=noirq or pci=noacpi "
1785                        "may have problem\n");
1786                 return 1;
1787         }
1788 #endif
1789         return 0;
1790 }
1791
1792 #ifdef CONFIG_X86_IO_APIC
1793 static int __init parse_acpi_skip_timer_override(char *arg)
1794 {
1795         acpi_skip_timer_override = 1;
1796         return 0;
1797 }
1798 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1799
1800 static int __init parse_acpi_use_timer_override(char *arg)
1801 {
1802         acpi_use_timer_override = 1;
1803         return 0;
1804 }
1805 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1806 #endif /* CONFIG_X86_IO_APIC */
1807
1808 static int __init setup_acpi_sci(char *s)
1809 {
1810         if (!s)
1811                 return -EINVAL;
1812         if (!strcmp(s, "edge"))
1813                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1814                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1815         else if (!strcmp(s, "level"))
1816                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1817                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1818         else if (!strcmp(s, "high"))
1819                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1820                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1821         else if (!strcmp(s, "low"))
1822                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1823                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1824         else
1825                 return -EINVAL;
1826         return 0;
1827 }
1828 early_param("acpi_sci", setup_acpi_sci);
1829
1830 int __acpi_acquire_global_lock(unsigned int *lock)
1831 {
1832         unsigned int old, new, val;
1833         do {
1834                 old = *lock;
1835                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1836                 val = cmpxchg(lock, old, new);
1837         } while (unlikely (val != old));
1838         return (new < 3) ? -1 : 0;
1839 }
1840
1841 int __acpi_release_global_lock(unsigned int *lock)
1842 {
1843         unsigned int old, new, val;
1844         do {
1845                 old = *lock;
1846                 new = old & ~0x3;
1847                 val = cmpxchg(lock, old, new);
1848         } while (unlikely (val != old));
1849         return old & 0x1;
1850 }