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/irqdomain.h>
  35 #include <linux/slab.h>
  36 #include <linux/bootmem.h>
  37 #include <linux/ioport.h>
  38 #include <linux/pci.h>
  39
  40 #include <asm/pci_x86.h>
  41 #include <asm/pgtable.h>
  42 #include <asm/io_apic.h>
  43 #include <asm/apic.h>
  44 #include <asm/io.h>
  45 #include <asm/mpspec.h>
  46 #include <asm/smp.h>
  47 #include <asm/i8259.h>
  48
  49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
  50 static int __initdata acpi_force = 0;
  51 int acpi_disabled;
  52 EXPORT_SYMBOL(acpi_disabled);
  53
  54 #ifdef  CONFIG_X86_64
  55 # include <asm/proto.h>
  56 #endif                          /* X86 */
  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
  64 int acpi_lapic;
  65 int acpi_ioapic;
  66 int acpi_strict;
  67 int acpi_disable_cmcff;
  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 int acpi_fix_pin2_polarity __initdata;
  74
  75 #ifdef CONFIG_X86_LOCAL_APIC
  76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  77 #endif
  78
  79 /* --------------------------------------------------------------------------
  80                               Boot-time Configuration
  81    -------------------------------------------------------------------------- */
  82
  83 /*
  84  * The default interrupt routing model is PIC (8259).  This gets
  85  * overridden if IOAPICs are enumerated (below).
  86  */
  87 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  88
  89
  90 /*
  91  * ISA irqs by default are the first 16 gsis but can be
  92  * any gsi as specified by an interrupt source override.
  93  */
  94 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
  95         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
  96 };
  97
  98 #define ACPI_INVALID_GSI                INT_MIN
  99
 100 /*
 101  * This is just a simple wrapper around early_ioremap(),
 102  * with sanity checks for phys == 0 and size == 0.
 103  */
 104 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 105 {
 106
 107         if (!phys || !size)
 108                 return NULL;
 109
 110         return early_ioremap(phys, size);
 111 }
 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 /**
 149  * acpi_register_lapic - register a local apic and generates a logic cpu number
 150  * @id: local apic id to register
 151  * @enabled: this cpu is enabled or not
 152  *
 153  * Returns the logic cpu number which maps to the local apic
 154  */
 155 static int acpi_register_lapic(int id, u8 enabled)
 156 {
 157         unsigned int ver = 0;
 158
 159         if (id >= MAX_LOCAL_APIC) {
 160                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 161                 return -EINVAL;
 162         }
 163
 164         if (!enabled) {
 165                 ++disabled_cpus;
 166                 return -EINVAL;
 167         }
 168
 169         if (boot_cpu_physical_apicid != -1U)
 170                 ver = apic_version[boot_cpu_physical_apicid];
 171
 172         return generic_processor_info(id, ver);
 173 }
 174
 175 static int __init
 176 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 177 {
 178         struct acpi_madt_local_x2apic *processor = NULL;
 179         int apic_id;
 180         u8 enabled;
 181
 182         processor = (struct acpi_madt_local_x2apic *)header;
 183
 184         if (BAD_MADT_ENTRY(processor, end))
 185                 return -EINVAL;
 186
 187         acpi_table_print_madt_entry(header);
 188
 189         apic_id = processor->local_apic_id;
 190         enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
 191 #ifdef CONFIG_X86_X2APIC
 192         /*
 193          * We need to register disabled CPU as well to permit
 194          * counting disabled CPUs. This allows us to size
 195          * cpus_possible_map more accurately, to permit
 196          * to not preallocating memory for all NR_CPUS
 197          * when we use CPU hotplug.
 198          */
 199         if (!apic->apic_id_valid(apic_id) && enabled)
 200                 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 201         else
 202                 acpi_register_lapic(apic_id, enabled);
 203 #else
 204         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 205 #endif
 206
 207         return 0;
 208 }
 209
 210 static int __init
 211 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 212 {
 213         struct acpi_madt_local_apic *processor = NULL;
 214
 215         processor = (struct acpi_madt_local_apic *)header;
 216
 217         if (BAD_MADT_ENTRY(processor, end))
 218                 return -EINVAL;
 219
 220         acpi_table_print_madt_entry(header);
 221
 222         /*
 223          * We need to register disabled CPU as well to permit
 224          * counting disabled CPUs. This allows us to size
 225          * cpus_possible_map more accurately, to permit
 226          * to not preallocating memory for all NR_CPUS
 227          * when we use CPU hotplug.
 228          */
 229         acpi_register_lapic(processor->id,      /* APIC ID */
 230                             processor->lapic_flags & ACPI_MADT_ENABLED);
 231
 232         return 0;
 233 }
 234
 235 static int __init
 236 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 237 {
 238         struct acpi_madt_local_sapic *processor = NULL;
 239
 240         processor = (struct acpi_madt_local_sapic *)header;
 241
 242         if (BAD_MADT_ENTRY(processor, end))
 243                 return -EINVAL;
 244
 245         acpi_table_print_madt_entry(header);
 246
 247         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 248                             processor->lapic_flags & ACPI_MADT_ENABLED);
 249
 250         return 0;
 251 }
 252
 253 static int __init
 254 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 255                           const unsigned long end)
 256 {
 257         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 258
 259         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 260
 261         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 262                 return -EINVAL;
 263
 264         acpi_lapic_addr = lapic_addr_ovr->address;
 265
 266         return 0;
 267 }
 268
 269 static int __init
 270 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 271                       const unsigned long end)
 272 {
 273         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 274
 275         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 276
 277         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 278                 return -EINVAL;
 279
 280         acpi_table_print_madt_entry(header);
 281
 282         if (x2apic_nmi->lint != 1)
 283                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 284
 285         return 0;
 286 }
 287
 288 static int __init
 289 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 290 {
 291         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 292
 293         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 294
 295         if (BAD_MADT_ENTRY(lapic_nmi, end))
 296                 return -EINVAL;
 297
 298         acpi_table_print_madt_entry(header);
 299
 300         if (lapic_nmi->lint != 1)
 301                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 302
 303         return 0;
 304 }
 305
 306 #endif                          /*CONFIG_X86_LOCAL_APIC */
 307
 308 #ifdef CONFIG_X86_IO_APIC
 309 #define MP_ISA_BUS              0
 310
 311 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
 312                                           u32 gsi)
 313 {
 314         int ioapic;
 315         int pin;
 316         struct mpc_intsrc mp_irq;
 317
 318         /*
 319          * Convert 'gsi' to 'ioapic.pin'.
 320          */
 321         ioapic = mp_find_ioapic(gsi);
 322         if (ioapic < 0)
 323                 return;
 324         pin = mp_find_ioapic_pin(ioapic, gsi);
 325
 326         /*
 327          * TBD: This check is for faulty timer entries, where the override
 328          *      erroneously sets the trigger to level, resulting in a HUGE
 329          *      increase of timer interrupts!
 330          */
 331         if ((bus_irq == 0) && (trigger == 3))
 332                 trigger = 1;
 333
 334         mp_irq.type = MP_INTSRC;
 335         mp_irq.irqtype = mp_INT;
 336         mp_irq.irqflag = (trigger << 2) | polarity;
 337         mp_irq.srcbus = MP_ISA_BUS;
 338         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 339         mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
 340         mp_irq.dstirq = pin;    /* INTIN# */
 341
 342         mp_save_irq(&mp_irq);
 343
 344         /*
 345          * Reset default identity mapping if gsi is also an legacy IRQ,
 346          * otherwise there will be more than one entry with the same GSI
 347          * and acpi_isa_irq_to_gsi() may give wrong result.
 348          */
 349         if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
 350                 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
 351         isa_irq_to_gsi[bus_irq] = gsi;
 352 }
 353
 354 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 355                         int polarity)
 356 {
 357 #ifdef CONFIG_X86_MPPARSE
 358         struct mpc_intsrc mp_irq;
 359         struct pci_dev *pdev;
 360         unsigned char number;
 361         unsigned int devfn;
 362         int ioapic;
 363         u8 pin;
 364
 365         if (!acpi_ioapic)
 366                 return 0;
 367         if (!dev || !dev_is_pci(dev))
 368                 return 0;
 369
 370         pdev = to_pci_dev(dev);
 371         number = pdev->bus->number;
 372         devfn = pdev->devfn;
 373         pin = pdev->pin;
 374         /* print the entry should happen on mptable identically */
 375         mp_irq.type = MP_INTSRC;
 376         mp_irq.irqtype = mp_INT;
 377         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
 378                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
 379         mp_irq.srcbus = number;
 380         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
 381         ioapic = mp_find_ioapic(gsi);
 382         mp_irq.dstapic = mpc_ioapic_id(ioapic);
 383         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
 384
 385         mp_save_irq(&mp_irq);
 386 #endif
 387         return 0;
 388 }
 389
 390 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
 391                            int polarity)
 392 {
 393         int irq, node;
 394
 395         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
 396                 return gsi;
 397
 398         /* Don't set up the ACPI SCI because it's already set up */
 399         if (acpi_gbl_FADT.sci_interrupt == gsi)
 400                 return mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
 401
 402         trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
 403         polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
 404         node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
 405         if (mp_set_gsi_attr(gsi, trigger, polarity, node)) {
 406                 pr_warn("Failed to set pin attr for GSI%d\n", gsi);
 407                 return -1;
 408         }
 409
 410         irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
 411         if (irq < 0)
 412                 return irq;
 413
 414         if (enable_update_mptable)
 415                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
 416
 417         return irq;
 418 }
 419
 420 static void mp_unregister_gsi(u32 gsi)
 421 {
 422         int irq;
 423
 424         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
 425                 return;
 426
 427         if (acpi_gbl_FADT.sci_interrupt == gsi)
 428                 return;
 429
 430         irq = mp_map_gsi_to_irq(gsi, 0);
 431         if (irq > 0)
 432                 mp_unmap_irq(irq);
 433 }
 434
 435 static struct irq_domain_ops acpi_irqdomain_ops = {
 436         .map = mp_irqdomain_map,
 437         .unmap = mp_irqdomain_unmap,
 438 };
 439
 440 static int __init
 441 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 442 {
 443         struct acpi_madt_io_apic *ioapic = NULL;
 444         struct ioapic_domain_cfg cfg = {
 445                 .type = IOAPIC_DOMAIN_DYNAMIC,
 446                 .ops = &acpi_irqdomain_ops,
 447         };
 448
 449         ioapic = (struct acpi_madt_io_apic *)header;
 450
 451         if (BAD_MADT_ENTRY(ioapic, end))
 452                 return -EINVAL;
 453
 454         acpi_table_print_madt_entry(header);
 455
 456         /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
 457         if (ioapic->global_irq_base < nr_legacy_irqs())
 458                 cfg.type = IOAPIC_DOMAIN_LEGACY;
 459
 460         mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
 461                            &cfg);
 462
 463         return 0;
 464 }
 465
 466 /*
 467  * Parse Interrupt Source Override for the ACPI SCI
 468  */
 469 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 470 {
 471         if (trigger == 0)       /* compatible SCI trigger is level */
 472                 trigger = 3;
 473
 474         if (polarity == 0)      /* compatible SCI polarity is low */
 475                 polarity = 3;
 476
 477         /* Command-line over-ride via acpi_sci= */
 478         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 479                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 480
 481         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 482                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 483
 484         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 485
 486         /*
 487          * stash over-ride to indicate we've been here
 488          * and for later update of acpi_gbl_FADT
 489          */
 490         acpi_sci_override_gsi = gsi;
 491         return;
 492 }
 493
 494 static int __init
 495 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 496                        const unsigned long end)
 497 {
 498         struct acpi_madt_interrupt_override *intsrc = NULL;
 499
 500         intsrc = (struct acpi_madt_interrupt_override *)header;
 501
 502         if (BAD_MADT_ENTRY(intsrc, end))
 503                 return -EINVAL;
 504
 505         acpi_table_print_madt_entry(header);
 506
 507         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 508                 acpi_sci_ioapic_setup(intsrc->source_irq,
 509                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 510                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 511                                       intsrc->global_irq);
 512                 return 0;
 513         }
 514
 515         if (intsrc->source_irq == 0) {
 516                 if (acpi_skip_timer_override) {
 517                         printk(PREFIX "BIOS IRQ0 override ignored.\n");
 518                         return 0;
 519                 }
 520
 521                 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
 522                         && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 523                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 524                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 525                 }
 526         }
 527
 528         mp_override_legacy_irq(intsrc->source_irq,
 529                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 530                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 531                                 intsrc->global_irq);
 532
 533         return 0;
 534 }
 535
 536 static int __init
 537 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 538 {
 539         struct acpi_madt_nmi_source *nmi_src = NULL;
 540
 541         nmi_src = (struct acpi_madt_nmi_source *)header;
 542
 543         if (BAD_MADT_ENTRY(nmi_src, end))
 544                 return -EINVAL;
 545
 546         acpi_table_print_madt_entry(header);
 547
 548         /* TBD: Support nimsrc entries? */
 549
 550         return 0;
 551 }
 552
 553 #endif                          /* CONFIG_X86_IO_APIC */
 554
 555 /*
 556  * acpi_pic_sci_set_trigger()
 557  *
 558  * use ELCR to set PIC-mode trigger type for SCI
 559  *
 560  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 561  * it may require Edge Trigger -- use "acpi_sci=edge"
 562  *
 563  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 564  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 565  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 566  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 567  */
 568
 569 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 570 {
 571         unsigned int mask = 1 << irq;
 572         unsigned int old, new;
 573
 574         /* Real old ELCR mask */
 575         old = inb(0x4d0) | (inb(0x4d1) << 8);
 576
 577         /*
 578          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 579          * since we will set it correctly as we enable the PCI irq
 580          * routing.
 581          */
 582         new = acpi_noirq ? old : 0;
 583
 584         /*
 585          * Update SCI information in the ELCR, it isn't in the PCI
 586          * routing tables..
 587          */
 588         switch (trigger) {
 589         case 1:         /* Edge - clear */
 590                 new &= ~mask;
 591                 break;
 592         case 3:         /* Level - set */
 593                 new |= mask;
 594                 break;
 595         }
 596
 597         if (old == new)
 598                 return;
 599
 600         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 601         outb(new, 0x4d0);
 602         outb(new >> 8, 0x4d1);
 603 }
 604
 605 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
 606 {
 607         int irq;
 608
 609         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 610                 *irqp = gsi;
 611         } else {
 612                 irq = mp_map_gsi_to_irq(gsi,
 613                                         IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK);
 614                 if (irq < 0)
 615                         return -1;
 616                 *irqp = irq;
 617         }
 618         return 0;
 619 }
 620 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 621
 622 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 623 {
 624         if (isa_irq < nr_legacy_irqs() &&
 625             isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
 626                 *gsi = isa_irq_to_gsi[isa_irq];
 627                 return 0;
 628         }
 629
 630         return -1;
 631 }
 632
 633 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 634                                  int trigger, int polarity)
 635 {
 636 #ifdef CONFIG_PCI
 637         /*
 638          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 639          */
 640         if (trigger == ACPI_LEVEL_SENSITIVE)
 641                 eisa_set_level_irq(gsi);
 642 #endif
 643
 644         return gsi;
 645 }
 646
 647 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 648                                     int trigger, int polarity)
 649 {
 650         int irq = gsi;
 651
 652 #ifdef CONFIG_X86_IO_APIC
 653         irq = mp_register_gsi(dev, gsi, trigger, polarity);
 654 #endif
 655
 656         return irq;
 657 }
 658
 659 static void acpi_unregister_gsi_ioapic(u32 gsi)
 660 {
 661 #ifdef CONFIG_X86_IO_APIC
 662         mp_unregister_gsi(gsi);
 663 #endif
 664 }
 665
 666 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 667                            int trigger, int polarity) = acpi_register_gsi_pic;
 668 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 669
 670 #ifdef CONFIG_ACPI_SLEEP
 671 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 672 #else
 673 int (*acpi_suspend_lowlevel)(void);
 674 #endif
 675
 676 /*
 677  * success: return IRQ number (>=0)
 678  * failure: return < 0
 679  */
 680 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 681 {
 682         return __acpi_register_gsi(dev, gsi, trigger, polarity);
 683 }
 684 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 685
 686 void acpi_unregister_gsi(u32 gsi)
 687 {
 688         if (__acpi_unregister_gsi)
 689                 __acpi_unregister_gsi(gsi);
 690 }
 691 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 692
 693 static void __init acpi_set_irq_model_ioapic(void)
 694 {
 695         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 696         __acpi_register_gsi = acpi_register_gsi_ioapic;
 697         __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 698         acpi_ioapic = 1;
 699 }
 700
 701 /*
 702  *  ACPI based hotplug support for CPU
 703  */
 704 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 705 #include <acpi/processor.h>
 706
 707 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 708 {
 709 #ifdef CONFIG_ACPI_NUMA
 710         int nid;
 711
 712         nid = acpi_get_node(handle);
 713         if (nid != -1) {
 714                 set_apicid_to_node(physid, nid);
 715                 numa_set_node(cpu, nid);
 716         }
 717 #endif
 718 }
 719
 720 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
 721 {
 722         int cpu;
 723
 724         cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
 725         if (cpu < 0) {
 726                 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
 727                 return cpu;
 728         }
 729
 730         acpi_processor_set_pdc(handle);
 731         acpi_map_cpu2node(handle, cpu, physid);
 732
 733         *pcpu = cpu;
 734         return 0;
 735 }
 736
 737 /* wrapper to silence section mismatch warning */
 738 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
 739 {
 740         return _acpi_map_lsapic(handle, physid, pcpu);
 741 }
 742 EXPORT_SYMBOL(acpi_map_lsapic);
 743
 744 int acpi_unmap_lsapic(int cpu)
 745 {
 746 #ifdef CONFIG_ACPI_NUMA
 747         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 748 #endif
 749
 750         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 751         set_cpu_present(cpu, false);
 752         num_processors--;
 753
 754         return (0);
 755 }
 756
 757 EXPORT_SYMBOL(acpi_unmap_lsapic);
 758 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 759
 760 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 761 {
 762         /* TBD */
 763         return -EINVAL;
 764 }
 765
 766 EXPORT_SYMBOL(acpi_register_ioapic);
 767
 768 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 769 {
 770         /* TBD */
 771         return -EINVAL;
 772 }
 773
 774 EXPORT_SYMBOL(acpi_unregister_ioapic);
 775
 776 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 777 {
 778         struct acpi_table_boot *sb;
 779
 780         sb = (struct acpi_table_boot *)table;
 781         if (!sb) {
 782                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 783                 return -ENODEV;
 784         }
 785
 786         sbf_port = sb->cmos_index;      /* Save CMOS port */
 787
 788         return 0;
 789 }
 790
 791 #ifdef CONFIG_HPET_TIMER
 792 #include <asm/hpet.h>
 793
 794 static struct resource *hpet_res __initdata;
 795
 796 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 797 {
 798         struct acpi_table_hpet *hpet_tbl;
 799
 800         hpet_tbl = (struct acpi_table_hpet *)table;
 801         if (!hpet_tbl) {
 802                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 803                 return -ENODEV;
 804         }
 805
 806         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 807                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 808                        "memory.\n");
 809                 return -1;
 810         }
 811
 812         hpet_address = hpet_tbl->address.address;
 813         hpet_blockid = hpet_tbl->sequence;
 814
 815         /*
 816          * Some broken BIOSes advertise HPET at 0x0. We really do not
 817          * want to allocate a resource there.
 818          */
 819         if (!hpet_address) {
 820                 printk(KERN_WARNING PREFIX
 821                        "HPET id: %#x base: %#lx is invalid\n",
 822                        hpet_tbl->id, hpet_address);
 823                 return 0;
 824         }
 825 #ifdef CONFIG_X86_64
 826         /*
 827          * Some even more broken BIOSes advertise HPET at
 828          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 829          * some noise:
 830          */
 831         if (hpet_address == 0xfed0000000000000UL) {
 832                 if (!hpet_force_user) {
 833                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 834                                "base: 0xfed0000000000000 is bogus\n "
 835                                "try hpet=force on the kernel command line to "
 836                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 837                         hpet_address = 0;
 838                         return 0;
 839                 }
 840                 printk(KERN_WARNING PREFIX
 841                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 842                        "to 0xfed00000.\n", hpet_tbl->id);
 843                 hpet_address >>= 32;
 844         }
 845 #endif
 846         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 847                hpet_tbl->id, hpet_address);
 848
 849         /*
 850          * Allocate and initialize the HPET firmware resource for adding into
 851          * the resource tree during the lateinit timeframe.
 852          */
 853 #define HPET_RESOURCE_NAME_SIZE 9
 854         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 855
 856         hpet_res->name = (void *)&hpet_res[1];
 857         hpet_res->flags = IORESOURCE_MEM;
 858         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 859                  hpet_tbl->sequence);
 860
 861         hpet_res->start = hpet_address;
 862         hpet_res->end = hpet_address + (1 * 1024) - 1;
 863
 864         return 0;
 865 }
 866
 867 /*
 868  * hpet_insert_resource inserts the HPET resources used into the resource
 869  * tree.
 870  */
 871 static __init int hpet_insert_resource(void)
 872 {
 873         if (!hpet_res)
 874                 return 1;
 875
 876         return insert_resource(&iomem_resource, hpet_res);
 877 }
 878
 879 late_initcall(hpet_insert_resource);
 880
 881 #else
 882 #define acpi_parse_hpet NULL
 883 #endif
 884
 885 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 886 {
 887
 888 #ifdef CONFIG_X86_PM_TIMER
 889         /* detect the location of the ACPI PM Timer */
 890         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 891                 /* FADT rev. 2 */
 892                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 893                     ACPI_ADR_SPACE_SYSTEM_IO)
 894                         return 0;
 895
 896                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 897                 /*
 898                  * "X" fields are optional extensions to the original V1.0
 899                  * fields, so we must selectively expand V1.0 fields if the
 900                  * corresponding X field is zero.
 901                  */
 902                 if (!pmtmr_ioport)
 903                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 904         } else {
 905                 /* FADT rev. 1 */
 906                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 907         }
 908         if (pmtmr_ioport)
 909                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 910                        pmtmr_ioport);
 911 #endif
 912         return 0;
 913 }
 914
 915 #ifdef  CONFIG_X86_LOCAL_APIC
 916 /*
 917  * Parse LAPIC entries in MADT
 918  * returns 0 on success, < 0 on error
 919  */
 920
 921 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 922 {
 923         int count;
 924
 925         if (!cpu_has_apic)
 926                 return -ENODEV;
 927
 928         /*
 929          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 930          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 931          */
 932
 933         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 934                                       acpi_parse_lapic_addr_ovr, 0);
 935         if (count < 0) {
 936                 printk(KERN_ERR PREFIX
 937                        "Error parsing LAPIC address override entry\n");
 938                 return count;
 939         }
 940
 941         register_lapic_address(acpi_lapic_addr);
 942
 943         return count;
 944 }
 945
 946 static int __init acpi_parse_madt_lapic_entries(void)
 947 {
 948         int count;
 949         int x2count = 0;
 950
 951         if (!cpu_has_apic)
 952                 return -ENODEV;
 953
 954         /*
 955          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 956          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 957          */
 958
 959         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 960                                       acpi_parse_lapic_addr_ovr, 0);
 961         if (count < 0) {
 962                 printk(KERN_ERR PREFIX
 963                        "Error parsing LAPIC address override entry\n");
 964                 return count;
 965         }
 966
 967         register_lapic_address(acpi_lapic_addr);
 968
 969         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 970                                       acpi_parse_sapic, MAX_LOCAL_APIC);
 971
 972         if (!count) {
 973                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 974                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
 975                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 976                                         acpi_parse_lapic, MAX_LOCAL_APIC);
 977         }
 978         if (!count && !x2count) {
 979                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 980                 /* TBD: Cleanup to allow fallback to MPS */
 981                 return -ENODEV;
 982         } else if (count < 0 || x2count < 0) {
 983                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 984                 /* TBD: Cleanup to allow fallback to MPS */
 985                 return count;
 986         }
 987
 988         x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 989                                         acpi_parse_x2apic_nmi, 0);
 990         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
 991                                       acpi_parse_lapic_nmi, 0);
 992         if (count < 0 || x2count < 0) {
 993                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 994                 /* TBD: Cleanup to allow fallback to MPS */
 995                 return count;
 996         }
 997         return 0;
 998 }
 999 #endif                          /* CONFIG_X86_LOCAL_APIC */
1000
1001 #ifdef  CONFIG_X86_IO_APIC
1002 static void __init mp_config_acpi_legacy_irqs(void)
1003 {
1004         int i;
1005         struct mpc_intsrc mp_irq;
1006
1007 #ifdef CONFIG_EISA
1008         /*
1009          * Fabricate the legacy ISA bus (bus #31).
1010          */
1011         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1012 #endif
1013         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1014         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1015
1016         /*
1017          * Use the default configuration for the IRQs 0-15.  Unless
1018          * overridden by (MADT) interrupt source override entries.
1019          */
1020         for (i = 0; i < nr_legacy_irqs(); i++) {
1021                 int ioapic, pin;
1022                 unsigned int dstapic;
1023                 int idx;
1024                 u32 gsi;
1025
1026                 /* Locate the gsi that irq i maps to. */
1027                 if (acpi_isa_irq_to_gsi(i, &gsi))
1028                         continue;
1029
1030                 /*
1031                  * Locate the IOAPIC that manages the ISA IRQ.
1032                  */
1033                 ioapic = mp_find_ioapic(gsi);
1034                 if (ioapic < 0)
1035                         continue;
1036                 pin = mp_find_ioapic_pin(ioapic, gsi);
1037                 dstapic = mpc_ioapic_id(ioapic);
1038
1039                 for (idx = 0; idx < mp_irq_entries; idx++) {
1040                         struct mpc_intsrc *irq = mp_irqs + idx;
1041
1042                         /* Do we already have a mapping for this ISA IRQ? */
1043                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1044                                 break;
1045
1046                         /* Do we already have a mapping for this IOAPIC pin */
1047                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1048                                 break;
1049                 }
1050
1051                 if (idx != mp_irq_entries) {
1052                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1053                         continue;       /* IRQ already used */
1054                 }
1055
1056                 mp_irq.type = MP_INTSRC;
1057                 mp_irq.irqflag = 0;     /* Conforming */
1058                 mp_irq.srcbus = MP_ISA_BUS;
1059                 mp_irq.dstapic = dstapic;
1060                 mp_irq.irqtype = mp_INT;
1061                 mp_irq.srcbusirq = i; /* Identity mapped */
1062                 mp_irq.dstirq = pin;
1063
1064                 mp_save_irq(&mp_irq);
1065         }
1066 }
1067
1068 /*
1069  * Parse IOAPIC related entries in MADT
1070  * returns 0 on success, < 0 on error
1071  */
1072 static int __init acpi_parse_madt_ioapic_entries(void)
1073 {
1074         int count;
1075
1076         /*
1077          * ACPI interpreter is required to complete interrupt setup,
1078          * so if it is off, don't enumerate the io-apics with ACPI.
1079          * If MPS is present, it will handle them,
1080          * otherwise the system will stay in PIC mode
1081          */
1082         if (acpi_disabled || acpi_noirq)
1083                 return -ENODEV;
1084
1085         if (!cpu_has_apic)
1086                 return -ENODEV;
1087
1088         /*
1089          * if "noapic" boot option, don't look for IO-APICs
1090          */
1091         if (skip_ioapic_setup) {
1092                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1093                        "due to 'noapic' option.\n");
1094                 return -ENODEV;
1095         }
1096
1097         count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1098                                       MAX_IO_APICS);
1099         if (!count) {
1100                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1101                 return -ENODEV;
1102         } else if (count < 0) {
1103                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1104                 return count;
1105         }
1106
1107         count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1108                                       acpi_parse_int_src_ovr, nr_irqs);
1109         if (count < 0) {
1110                 printk(KERN_ERR PREFIX
1111                        "Error parsing interrupt source overrides entry\n");
1112                 /* TBD: Cleanup to allow fallback to MPS */
1113                 return count;
1114         }
1115
1116         /*
1117          * If BIOS did not supply an INT_SRC_OVR for the SCI
1118          * pretend we got one so we can set the SCI flags.
1119          */
1120         if (!acpi_sci_override_gsi)
1121                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1122                                       acpi_gbl_FADT.sci_interrupt);
1123
1124         /* Fill in identity legacy mappings where no override */
1125         mp_config_acpi_legacy_irqs();
1126
1127         count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1128                                       acpi_parse_nmi_src, nr_irqs);
1129         if (count < 0) {
1130                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1131                 /* TBD: Cleanup to allow fallback to MPS */
1132                 return count;
1133         }
1134
1135         return 0;
1136 }
1137 #else
1138 static inline int acpi_parse_madt_ioapic_entries(void)
1139 {
1140         return -1;
1141 }
1142 #endif  /* !CONFIG_X86_IO_APIC */
1143
1144 static void __init early_acpi_process_madt(void)
1145 {
1146 #ifdef CONFIG_X86_LOCAL_APIC
1147         int error;
1148
1149         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1150
1151                 /*
1152                  * Parse MADT LAPIC entries
1153                  */
1154                 error = early_acpi_parse_madt_lapic_addr_ovr();
1155                 if (!error) {
1156                         acpi_lapic = 1;
1157                         smp_found_config = 1;
1158                 }
1159                 if (error == -EINVAL) {
1160                         /*
1161                          * Dell Precision Workstation 410, 610 come here.
1162                          */
1163                         printk(KERN_ERR PREFIX
1164                                "Invalid BIOS MADT, disabling ACPI\n");
1165                         disable_acpi();
1166                 }
1167         }
1168 #endif
1169 }
1170
1171 static void __init acpi_process_madt(void)
1172 {
1173 #ifdef CONFIG_X86_LOCAL_APIC
1174         int error;
1175
1176         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1177
1178                 /*
1179                  * Parse MADT LAPIC entries
1180                  */
1181                 error = acpi_parse_madt_lapic_entries();
1182                 if (!error) {
1183                         acpi_lapic = 1;
1184
1185                         /*
1186                          * Parse MADT IO-APIC entries
1187                          */
1188                         error = acpi_parse_madt_ioapic_entries();
1189                         if (!error) {
1190                                 acpi_set_irq_model_ioapic();
1191
1192                                 smp_found_config = 1;
1193                         }
1194                 }
1195                 if (error == -EINVAL) {
1196                         /*
1197                          * Dell Precision Workstation 410, 610 come here.
1198                          */
1199                         printk(KERN_ERR PREFIX
1200                                "Invalid BIOS MADT, disabling ACPI\n");
1201                         disable_acpi();
1202                 }
1203         } else {
1204                 /*
1205                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1206                  * In the event an MPS table was found, forget it.
1207                  * Boot with "acpi=off" to use MPS on such a system.
1208                  */
1209                 if (smp_found_config) {
1210                         printk(KERN_WARNING PREFIX
1211                                 "No APIC-table, disabling MPS\n");
1212                         smp_found_config = 0;
1213                 }
1214         }
1215
1216         /*
1217          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1218          * processors, where MPS only supports physical.
1219          */
1220         if (acpi_lapic && acpi_ioapic)
1221                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1222                        "information\n");
1223         else if (acpi_lapic)
1224                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1225                        "configuration information\n");
1226 #endif
1227         return;
1228 }
1229
1230 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1231 {
1232         if (!acpi_force) {
1233                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1234                        d->ident);
1235                 acpi_noirq_set();
1236         }
1237         return 0;
1238 }
1239
1240 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1241 {
1242         if (!acpi_force) {
1243                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1244                        d->ident);
1245                 acpi_disable_pci();
1246         }
1247         return 0;
1248 }
1249
1250 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1251 {
1252         if (!acpi_force) {
1253                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1254                 disable_acpi();
1255         } else {
1256                 printk(KERN_NOTICE
1257                        "Warning: DMI blacklist says broken, but acpi forced\n");
1258         }
1259         return 0;
1260 }
1261
1262 /*
1263  * Force ignoring BIOS IRQ0 override
1264  */
1265 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1266 {
1267         if (!acpi_skip_timer_override) {
1268                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1269                         d->ident);
1270                 acpi_skip_timer_override = 1;
1271         }
1272         return 0;
1273 }
1274
1275 /*
1276  * If your system is blacklisted here, but you find that acpi=force
1277  * works for you, please contact linux-acpi@vger.kernel.org
1278  */
1279 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1280         /*
1281          * Boxes that need ACPI disabled
1282          */
1283         {
1284          .callback = dmi_disable_acpi,
1285          .ident = "IBM Thinkpad",
1286          .matches = {
1287                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1288                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1289                      },
1290          },
1291
1292         /*
1293          * Boxes that need ACPI PCI IRQ routing disabled
1294          */
1295         {
1296          .callback = disable_acpi_irq,
1297          .ident = "ASUS A7V",
1298          .matches = {
1299                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1300                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1301                      /* newer BIOS, Revision 1011, does work */
1302                      DMI_MATCH(DMI_BIOS_VERSION,
1303                                "ASUS A7V ACPI BIOS Revision 1007"),
1304                      },
1305          },
1306         {
1307                 /*
1308                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1309                  * for LPC bridge, which is needed for the PCI
1310                  * interrupt links to work. DSDT fix is in bug 5966.
1311                  * 2645, 2646 model numbers are shared with 600/600E/600X
1312                  */
1313          .callback = disable_acpi_irq,
1314          .ident = "IBM Thinkpad 600 Series 2645",
1315          .matches = {
1316                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1317                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1318                      },
1319          },
1320         {
1321          .callback = disable_acpi_irq,
1322          .ident = "IBM Thinkpad 600 Series 2646",
1323          .matches = {
1324                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1325                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1326                      },
1327          },
1328         /*
1329          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1330          */
1331         {                       /* _BBN 0 bug */
1332          .callback = disable_acpi_pci,
1333          .ident = "ASUS PR-DLS",
1334          .matches = {
1335                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1336                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1337                      DMI_MATCH(DMI_BIOS_VERSION,
1338                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1339                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1340                      },
1341          },
1342         {
1343          .callback = disable_acpi_pci,
1344          .ident = "Acer TravelMate 36x Laptop",
1345          .matches = {
1346                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1347                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1348                      },
1349          },
1350         {}
1351 };
1352
1353 /* second table for DMI checks that should run after early-quirks */
1354 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1355         /*
1356          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1357          * which includes some code which overrides all temperature
1358          * trip points to 16C if the INTIN2 input of the I/O APIC
1359          * is enabled.  This input is incorrectly designated the
1360          * ISA IRQ 0 via an interrupt source override even though
1361          * it is wired to the output of the master 8259A and INTIN0
1362          * is not connected at all.  Force ignoring BIOS IRQ0
1363          * override in that cases.
1364          */
1365         {
1366          .callback = dmi_ignore_irq0_timer_override,
1367          .ident = "HP nx6115 laptop",
1368          .matches = {
1369                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1370                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1371                      },
1372          },
1373         {
1374          .callback = dmi_ignore_irq0_timer_override,
1375          .ident = "HP NX6125 laptop",
1376          .matches = {
1377                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1378                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1379                      },
1380          },
1381         {
1382          .callback = dmi_ignore_irq0_timer_override,
1383          .ident = "HP NX6325 laptop",
1384          .matches = {
1385                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1386                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1387                      },
1388          },
1389         {
1390          .callback = dmi_ignore_irq0_timer_override,
1391          .ident = "HP 6715b laptop",
1392          .matches = {
1393                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1394                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1395                      },
1396          },
1397         {
1398          .callback = dmi_ignore_irq0_timer_override,
1399          .ident = "FUJITSU SIEMENS",
1400          .matches = {
1401                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1402                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1403                      },
1404          },
1405         {}
1406 };
1407
1408 /*
1409  * acpi_boot_table_init() and acpi_boot_init()
1410  *  called from setup_arch(), always.
1411  *      1. checksums all tables
1412  *      2. enumerates lapics
1413  *      3. enumerates io-apics
1414  *
1415  * acpi_table_init() is separate to allow reading SRAT without
1416  * other side effects.
1417  *
1418  * side effects of acpi_boot_init:
1419  *      acpi_lapic = 1 if LAPIC found
1420  *      acpi_ioapic = 1 if IOAPIC found
1421  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1422  *      if acpi_blacklisted() acpi_disabled = 1;
1423  *      acpi_irq_model=...
1424  *      ...
1425  */
1426
1427 void __init acpi_boot_table_init(void)
1428 {
1429         dmi_check_system(acpi_dmi_table);
1430
1431         /*
1432          * If acpi_disabled, bail out
1433          */
1434         if (acpi_disabled)
1435                 return;
1436
1437         /*
1438          * Initialize the ACPI boot-time table parser.
1439          */
1440         if (acpi_table_init()) {
1441                 disable_acpi();
1442                 return;
1443         }
1444
1445         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1446
1447         /*
1448          * blacklist may disable ACPI entirely
1449          */
1450         if (acpi_blacklisted()) {
1451                 if (acpi_force) {
1452                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1453                 } else {
1454                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1455                         disable_acpi();
1456                         return;
1457                 }
1458         }
1459 }
1460
1461 int __init early_acpi_boot_init(void)
1462 {
1463         /*
1464          * If acpi_disabled, bail out
1465          */
1466         if (acpi_disabled)
1467                 return 1;
1468
1469         /*
1470          * Process the Multiple APIC Description Table (MADT), if present
1471          */
1472         early_acpi_process_madt();
1473
1474         return 0;
1475 }
1476
1477 int __init acpi_boot_init(void)
1478 {
1479         /* those are executed after early-quirks are executed */
1480         dmi_check_system(acpi_dmi_table_late);
1481
1482         /*
1483          * If acpi_disabled, bail out
1484          */
1485         if (acpi_disabled)
1486                 return 1;
1487
1488         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1489
1490         /*
1491          * set sci_int and PM timer address
1492          */
1493         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1494
1495         /*
1496          * Process the Multiple APIC Description Table (MADT), if present
1497          */
1498         acpi_process_madt();
1499
1500         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1501
1502         if (!acpi_noirq)
1503                 x86_init.pci.init = pci_acpi_init;
1504
1505         return 0;
1506 }
1507
1508 static int __init parse_acpi(char *arg)
1509 {
1510         if (!arg)
1511                 return -EINVAL;
1512
1513         /* "acpi=off" disables both ACPI table parsing and interpreter */
1514         if (strcmp(arg, "off") == 0) {
1515                 disable_acpi();
1516         }
1517         /* acpi=force to over-ride black-list */
1518         else if (strcmp(arg, "force") == 0) {
1519                 acpi_force = 1;
1520                 acpi_disabled = 0;
1521         }
1522         /* acpi=strict disables out-of-spec workarounds */
1523         else if (strcmp(arg, "strict") == 0) {
1524                 acpi_strict = 1;
1525         }
1526         /* acpi=rsdt use RSDT instead of XSDT */
1527         else if (strcmp(arg, "rsdt") == 0) {
1528                 acpi_gbl_do_not_use_xsdt = TRUE;
1529         }
1530         /* "acpi=noirq" disables ACPI interrupt routing */
1531         else if (strcmp(arg, "noirq") == 0) {
1532                 acpi_noirq_set();
1533         }
1534         /* "acpi=copy_dsdt" copys DSDT */
1535         else if (strcmp(arg, "copy_dsdt") == 0) {
1536                 acpi_gbl_copy_dsdt_locally = 1;
1537         }
1538         /* "acpi=nocmcff" disables FF mode for corrected errors */
1539         else if (strcmp(arg, "nocmcff") == 0) {
1540                 acpi_disable_cmcff = 1;
1541         } else {
1542                 /* Core will printk when we return error. */
1543                 return -EINVAL;
1544         }
1545         return 0;
1546 }
1547 early_param("acpi", parse_acpi);
1548
1549 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1550 static int __init parse_pci(char *arg)
1551 {
1552         if (arg && strcmp(arg, "noacpi") == 0)
1553                 acpi_disable_pci();
1554         return 0;
1555 }
1556 early_param("pci", parse_pci);
1557
1558 int __init acpi_mps_check(void)
1559 {
1560 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1561 /* mptable code is not built-in*/
1562         if (acpi_disabled || acpi_noirq) {
1563                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1564                        "Using acpi=off or acpi=noirq or pci=noacpi "
1565                        "may have problem\n");
1566                 return 1;
1567         }
1568 #endif
1569         return 0;
1570 }
1571
1572 #ifdef CONFIG_X86_IO_APIC
1573 static int __init parse_acpi_skip_timer_override(char *arg)
1574 {
1575         acpi_skip_timer_override = 1;
1576         return 0;
1577 }
1578 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1579
1580 static int __init parse_acpi_use_timer_override(char *arg)
1581 {
1582         acpi_use_timer_override = 1;
1583         return 0;
1584 }
1585 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1586 #endif /* CONFIG_X86_IO_APIC */
1587
1588 static int __init setup_acpi_sci(char *s)
1589 {
1590         if (!s)
1591                 return -EINVAL;
1592         if (!strcmp(s, "edge"))
1593                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1594                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1595         else if (!strcmp(s, "level"))
1596                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1597                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1598         else if (!strcmp(s, "high"))
1599                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1600                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1601         else if (!strcmp(s, "low"))
1602                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1603                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1604         else
1605                 return -EINVAL;
1606         return 0;
1607 }
1608 early_param("acpi_sci", setup_acpi_sci);
1609
1610 int __acpi_acquire_global_lock(unsigned int *lock)
1611 {
1612         unsigned int old, new, val;
1613         do {
1614                 old = *lock;
1615                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1616                 val = cmpxchg(lock, old, new);
1617         } while (unlikely (val != old));
1618         return (new < 3) ? -1 : 0;
1619 }
1620
1621 int __acpi_release_global_lock(unsigned int *lock)
1622 {
1623         unsigned int old, new, val;
1624         do {
1625                 old = *lock;
1626                 new = old & ~0x3;
1627                 val = cmpxchg(lock, old, new);
1628         } while (unlikely (val != old));
1629         return old & 0x1;
1630 }
1631
1632 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1633 {
1634         e820_add_region(addr, size, E820_ACPI);
1635         update_e820();
1636 }